From e73f843a3235a19de38359c91586e9eadef12238 Mon Sep 17 00:00:00 2001
From: Suresh Jayaraman <sjayaraman@suse.com>
Date: Tue, 12 Jun 2012 07:15:50 +0530
Subject: cifs: fix parsing of password mount option
The double delimiter check that allows a comma in the password parsing code is
unconditional. We set "tmp_end" to the end of the string and we continue to
check for double delimiter. In the case where the password doesn't contain a
comma we end up setting tmp_end to NULL and eventually setting "options" to
"end". This results in the premature termination of the options string and hence
the values of UNCip and UNC are being set to NULL. This results in mount failure
with "Connecting to DFS root not implemented yet" error.
This error is usually not noticable as we have password as the last option in
the superblock mountdata. But when we call expand_dfs_referral() from
cifs_mount() and try to compose mount options for the submount, the resulting
mountdata will be of the form
",ver=1,user=foo,pass=bar,ip=x.x.x.x,unc=\\server\share"
and hence results in the above error. This bug has been seen with older NAS
servers running Samba 3.0.24.
Fix this by moving the double delimiter check inside the conditional loop.
Changes since -v1
- removed the wrong strlen() micro optimization.
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.com>
Acked-by: Sachin Prabhu <sprabhu@redhat.com>
Cc: stable@vger.kernel.org [3.1+]
Signed-off-by: Steve French <sfrench@us.ibm.com>
---
fs/cifs/connect.c | 32 +++++++++++++++++---------------
1 file changed, 17 insertions(+), 15 deletions(-)
(limited to 'fs')
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 78db68a5cf4..5b3840725d0 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1653,24 +1653,26 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
* If yes, we have encountered a double deliminator
* reset the NULL character to the deliminator
*/
- if (tmp_end < end && tmp_end[1] == delim)
+ if (tmp_end < end && tmp_end[1] == delim) {
tmp_end[0] = delim;
- /* Keep iterating until we get to a single deliminator
- * OR the end
- */
- while ((tmp_end = strchr(tmp_end, delim)) != NULL &&
- (tmp_end[1] == delim)) {
- tmp_end = (char *) &tmp_end[2];
- }
+ /* Keep iterating until we get to a single
+ * deliminator OR the end
+ */
+ while ((tmp_end = strchr(tmp_end, delim))
+ != NULL && (tmp_end[1] == delim)) {
+ tmp_end = (char *) &tmp_end[2];
+ }
- /* Reset var options to point to next element */
- if (tmp_end) {
- tmp_end[0] = '\0';
- options = (char *) &tmp_end[1];
- } else
- /* Reached the end of the mount option string */
- options = end;
+ /* Reset var options to point to next element */
+ if (tmp_end) {
+ tmp_end[0] = '\0';
+ options = (char *) &tmp_end[1];
+ } else
+ /* Reached the end of the mount option
+ * string */
+ options = end;
+ }
/* Now build new password string */
temp_len = strlen(value);
--
cgit v1.2.3-70-g09d2
From 047fe3605235888f3ebcda0c728cb31937eadfe6 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Tue, 12 Jun 2012 15:24:40 +0200
Subject: splice: fix racy pipe->buffers uses
Dave Jones reported a kernel BUG at mm/slub.c:3474! triggered
by splice_shrink_spd() called from vmsplice_to_pipe()
commit 35f3d14dbbc5 (pipe: add support for shrinking and growing pipes)
added capability to adjust pipe->buffers.
Problem is some paths don't hold pipe mutex and assume pipe->buffers
doesn't change for their duration.
Fix this by adding nr_pages_max field in struct splice_pipe_desc, and
use it in place of pipe->buffers where appropriate.
splice_shrink_spd() loses its struct pipe_inode_info argument.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Tom Herbert <therbert@google.com>
Cc: stable <stable@vger.kernel.org> # 2.6.35
Tested-by: Dave Jones <davej@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
fs/splice.c | 35 ++++++++++++++++++++---------------
include/linux/splice.h | 8 ++++----
kernel/relay.c | 5 +++--
kernel/trace/trace.c | 6 ++++--
mm/shmem.c | 3 ++-
net/core/skbuff.c | 1 +
6 files changed, 34 insertions(+), 24 deletions(-)
(limited to 'fs')
diff --git a/fs/splice.c b/fs/splice.c
index c9f1318a3b8..7bf08fa22ec 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -273,13 +273,16 @@ void spd_release_page(struct splice_pipe_desc *spd, unsigned int i)
* Check if we need to grow the arrays holding pages and partial page
* descriptions.
*/
-int splice_grow_spd(struct pipe_inode_info *pipe, struct splice_pipe_desc *spd)
+int splice_grow_spd(const struct pipe_inode_info *pipe, struct splice_pipe_desc *spd)
{
- if (pipe->buffers <= PIPE_DEF_BUFFERS)
+ unsigned int buffers = ACCESS_ONCE(pipe->buffers);
+
+ spd->nr_pages_max = buffers;
+ if (buffers <= PIPE_DEF_BUFFERS)
return 0;
- spd->pages = kmalloc(pipe->buffers * sizeof(struct page *), GFP_KERNEL);
- spd->partial = kmalloc(pipe->buffers * sizeof(struct partial_page), GFP_KERNEL);
+ spd->pages = kmalloc(buffers * sizeof(struct page *), GFP_KERNEL);
+ spd->partial = kmalloc(buffers * sizeof(struct partial_page), GFP_KERNEL);
if (spd->pages && spd->partial)
return 0;
@@ -289,10 +292,9 @@ int splice_grow_spd(struct pipe_inode_info *pipe, struct splice_pipe_desc *spd)
return -ENOMEM;
}
-void splice_shrink_spd(struct pipe_inode_info *pipe,
- struct splice_pipe_desc *spd)
+void splice_shrink_spd(struct splice_pipe_desc *spd)
{
- if (pipe->buffers <= PIPE_DEF_BUFFERS)
+ if (spd->nr_pages_max <= PIPE_DEF_BUFFERS)
return;
kfree(spd->pages);
@@ -315,6 +317,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
struct splice_pipe_desc spd = {
.pages = pages,
.partial = partial,
+ .nr_pages_max = PIPE_DEF_BUFFERS,
.flags = flags,
.ops = &page_cache_pipe_buf_ops,
.spd_release = spd_release_page,
@@ -326,7 +329,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
index = *ppos >> PAGE_CACHE_SHIFT;
loff = *ppos & ~PAGE_CACHE_MASK;
req_pages = (len + loff + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
- nr_pages = min(req_pages, pipe->buffers);
+ nr_pages = min(req_pages, spd.nr_pages_max);
/*
* Lookup the (hopefully) full range of pages we need.
@@ -497,7 +500,7 @@ fill_it:
if (spd.nr_pages)
error = splice_to_pipe(pipe, &spd);
- splice_shrink_spd(pipe, &spd);
+ splice_shrink_spd(&spd);
return error;
}
@@ -598,6 +601,7 @@ ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
struct splice_pipe_desc spd = {
.pages = pages,
.partial = partial,
+ .nr_pages_max = PIPE_DEF_BUFFERS,
.flags = flags,
.ops = &default_pipe_buf_ops,
.spd_release = spd_release_page,
@@ -608,8 +612,8 @@ ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
res = -ENOMEM;
vec = __vec;
- if (pipe->buffers > PIPE_DEF_BUFFERS) {
- vec = kmalloc(pipe->buffers * sizeof(struct iovec), GFP_KERNEL);
+ if (spd.nr_pages_max > PIPE_DEF_BUFFERS) {
+ vec = kmalloc(spd.nr_pages_max * sizeof(struct iovec), GFP_KERNEL);
if (!vec)
goto shrink_ret;
}
@@ -617,7 +621,7 @@ ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
offset = *ppos & ~PAGE_CACHE_MASK;
nr_pages = (len + offset + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
- for (i = 0; i < nr_pages && i < pipe->buffers && len; i++) {
+ for (i = 0; i < nr_pages && i < spd.nr_pages_max && len; i++) {
struct page *page;
page = alloc_page(GFP_USER);
@@ -665,7 +669,7 @@ ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
shrink_ret:
if (vec != __vec)
kfree(vec);
- splice_shrink_spd(pipe, &spd);
+ splice_shrink_spd(&spd);
return res;
err:
@@ -1614,6 +1618,7 @@ static long vmsplice_to_pipe(struct file *file, const struct iovec __user *iov,
struct splice_pipe_desc spd = {
.pages = pages,
.partial = partial,
+ .nr_pages_max = PIPE_DEF_BUFFERS,
.flags = flags,
.ops = &user_page_pipe_buf_ops,
.spd_release = spd_release_page,
@@ -1629,13 +1634,13 @@ static long vmsplice_to_pipe(struct file *file, const struct iovec __user *iov,
spd.nr_pages = get_iovec_page_array(iov, nr_segs, spd.pages,
spd.partial, false,
- pipe->buffers);
+ spd.nr_pages_max);
if (spd.nr_pages <= 0)
ret = spd.nr_pages;
else
ret = splice_to_pipe(pipe, &spd);
- splice_shrink_spd(pipe, &spd);
+ splice_shrink_spd(&spd);
return ret;
}
diff --git a/include/linux/splice.h b/include/linux/splice.h
index 26e5b613ded..09a545a7dfa 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
@@ -51,7 +51,8 @@ struct partial_page {
struct splice_pipe_desc {
struct page **pages; /* page map */
struct partial_page *partial; /* pages[] may not be contig */
- int nr_pages; /* number of pages in map */
+ int nr_pages; /* number of populated pages in map */
+ unsigned int nr_pages_max; /* pages[] & partial[] arrays size */
unsigned int flags; /* splice flags */
const struct pipe_buf_operations *ops;/* ops associated with output pipe */
void (*spd_release)(struct splice_pipe_desc *, unsigned int);
@@ -85,9 +86,8 @@ extern ssize_t splice_direct_to_actor(struct file *, struct splice_desc *,
/*
* for dynamic pipe sizing
*/
-extern int splice_grow_spd(struct pipe_inode_info *, struct splice_pipe_desc *);
-extern void splice_shrink_spd(struct pipe_inode_info *,
- struct splice_pipe_desc *);
+extern int splice_grow_spd(const struct pipe_inode_info *, struct splice_pipe_desc *);
+extern void splice_shrink_spd(struct splice_pipe_desc *);
extern void spd_release_page(struct splice_pipe_desc *, unsigned int);
extern const struct pipe_buf_operations page_cache_pipe_buf_ops;
diff --git a/kernel/relay.c b/kernel/relay.c
index ab56a1764d4..e8cd2027abb 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1235,6 +1235,7 @@ static ssize_t subbuf_splice_actor(struct file *in,
struct splice_pipe_desc spd = {
.pages = pages,
.nr_pages = 0,
+ .nr_pages_max = PIPE_DEF_BUFFERS,
.partial = partial,
.flags = flags,
.ops = &relay_pipe_buf_ops,
@@ -1302,8 +1303,8 @@ static ssize_t subbuf_splice_actor(struct file *in,
ret += padding;
out:
- splice_shrink_spd(pipe, &spd);
- return ret;
+ splice_shrink_spd(&spd);
+ return ret;
}
static ssize_t relay_file_splice_read(struct file *in,
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 68032c6177d..28848808222 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3609,6 +3609,7 @@ static ssize_t tracing_splice_read_pipe(struct file *filp,
.pages = pages_def,
.partial = partial_def,
.nr_pages = 0, /* This gets updated below. */
+ .nr_pages_max = PIPE_DEF_BUFFERS,
.flags = flags,
.ops = &tracing_pipe_buf_ops,
.spd_release = tracing_spd_release_pipe,
@@ -3680,7 +3681,7 @@ static ssize_t tracing_splice_read_pipe(struct file *filp,
ret = splice_to_pipe(pipe, &spd);
out:
- splice_shrink_spd(pipe, &spd);
+ splice_shrink_spd(&spd);
return ret;
out_err:
@@ -4231,6 +4232,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
struct splice_pipe_desc spd = {
.pages = pages_def,
.partial = partial_def,
+ .nr_pages_max = PIPE_DEF_BUFFERS,
.flags = flags,
.ops = &buffer_pipe_buf_ops,
.spd_release = buffer_spd_release,
@@ -4318,7 +4320,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
}
ret = splice_to_pipe(pipe, &spd);
- splice_shrink_spd(pipe, &spd);
+ splice_shrink_spd(&spd);
out:
return ret;
}
diff --git a/mm/shmem.c b/mm/shmem.c
index 585bd220a21..c244e93a70f 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1577,6 +1577,7 @@ static ssize_t shmem_file_splice_read(struct file *in, loff_t *ppos,
struct splice_pipe_desc spd = {
.pages = pages,
.partial = partial,
+ .nr_pages_max = PIPE_DEF_BUFFERS,
.flags = flags,
.ops = &page_cache_pipe_buf_ops,
.spd_release = spd_release_page,
@@ -1665,7 +1666,7 @@ static ssize_t shmem_file_splice_read(struct file *in, loff_t *ppos,
if (spd.nr_pages)
error = splice_to_pipe(pipe, &spd);
- splice_shrink_spd(pipe, &spd);
+ splice_shrink_spd(&spd);
if (error > 0) {
*ppos += error;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 016694d6248..bac3c5756d6 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1755,6 +1755,7 @@ int skb_splice_bits(struct sk_buff *skb, unsigned int offset,
struct splice_pipe_desc spd = {
.pages = pages,
.partial = partial,
+ .nr_pages_max = MAX_SKB_FRAGS,
.flags = flags,
.ops = &sock_pipe_buf_ops,
.spd_release = sock_spd_release,
--
cgit v1.2.3-70-g09d2
From 1cfb7271076a265b7c2cbbf9cf5c2ae060a24385 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Sat, 9 Jun 2012 12:08:23 +0300
Subject: UBIFS: fix assertion
The asserts here never check anything because it uses '|' instead of
'&'. Now if the flags are not set it prints a warning a a stack trace.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
---
fs/ubifs/find.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
(limited to 'fs')
diff --git a/fs/ubifs/find.c b/fs/ubifs/find.c
index 2559d174e00..28ec13af28d 100644
--- a/fs/ubifs/find.c
+++ b/fs/ubifs/find.c
@@ -939,8 +939,8 @@ static int find_dirtiest_idx_leb(struct ubifs_info *c)
}
dbg_find("LEB %d, dirty %d and free %d flags %#x", lp->lnum, lp->dirty,
lp->free, lp->flags);
- ubifs_assert(lp->flags | LPROPS_TAKEN);
- ubifs_assert(lp->flags | LPROPS_INDEX);
+ ubifs_assert(lp->flags & LPROPS_TAKEN);
+ ubifs_assert(lp->flags & LPROPS_INDEX);
return lnum;
}
--
cgit v1.2.3-70-g09d2
From 2d4cf5ae123e4a7bd26a88e600581aa809bcad7f Mon Sep 17 00:00:00 2001
From: Brian Norris <computersforpeace@gmail.com>
Date: Mon, 18 Jun 2012 16:31:22 -0700
Subject: UBIFS: correct usage of IS_ENABLED()
Commit "818039c UBIFS: fix debugfs-less systems support" fixed one
regression but introduced a different regression - the debugfs is now always
compiled out. Root cause: IS_ENABLED() arguments should be used with the
CONFIG_* prefix.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
---
fs/ubifs/debug.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
(limited to 'fs')
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 84a7e6f3c04..92df3b08153 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2918,7 +2918,7 @@ int dbg_debugfs_init_fs(struct ubifs_info *c)
struct dentry *dent;
struct ubifs_debug_info *d = c->dbg;
- if (!IS_ENABLED(DEBUG_FS))
+ if (!IS_ENABLED(CONFIG_DEBUG_FS))
return 0;
n = snprintf(d->dfs_dir_name, UBIFS_DFS_DIR_LEN + 1, UBIFS_DFS_DIR_NAME,
@@ -3013,7 +3013,7 @@ out:
*/
void dbg_debugfs_exit_fs(struct ubifs_info *c)
{
- if (IS_ENABLED(DEBUG_FS))
+ if (IS_ENABLED(CONFIG_DEBUG_FS))
debugfs_remove_recursive(c->dbg->dfs_dir);
}
@@ -3099,7 +3099,7 @@ int dbg_debugfs_init(void)
const char *fname;
struct dentry *dent;
- if (!IS_ENABLED(DEBUG_FS))
+ if (!IS_ENABLED(CONFIG_DEBUG_FS))
return 0;
fname = "ubifs";
@@ -3166,7 +3166,7 @@ out:
*/
void dbg_debugfs_exit(void)
{
- if (IS_ENABLED(DEBUG_FS))
+ if (IS_ENABLED(CONFIG_DEBUG_FS))
debugfs_remove_recursive(dfs_rootdir);
}
--
cgit v1.2.3-70-g09d2
From 8ca78f3eda4bf1799e8c4ba02035623fd7a347df Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Wed, 27 Jun 2012 15:05:48 +0200
Subject: Btrfs: avoid waiting for delayed refs when we must not
We track two conditions to decide if we should sleep while waiting for more
delayed refs, the number of delayed refs (num_refs) and the first entry in
the list of blockers (first_seq).
When we suspect staleness, we save num_refs and do one more cycle. If
nothing changes, we then save first_seq for later comparison and do
wait_event. We ought to save first_seq the very same moment we're saving
num_refs. Otherwise we cannot be sure that nothing has changed and we might
start waiting when we shouldn't, which could lead to starvation.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
---
fs/btrfs/extent-tree.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4b5a1e1bdef..6e1d36702ff 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2347,12 +2347,10 @@ next:
return count;
}
-
static void wait_for_more_refs(struct btrfs_delayed_ref_root *delayed_refs,
- unsigned long num_refs)
+ unsigned long num_refs,
+ struct list_head *first_seq)
{
- struct list_head *first_seq = delayed_refs->seq_head.next;
-
spin_unlock(&delayed_refs->lock);
pr_debug("waiting for more refs (num %ld, first %p)\n",
num_refs, first_seq);
@@ -2381,6 +2379,7 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_root *delayed_refs;
struct btrfs_delayed_ref_node *ref;
struct list_head cluster;
+ struct list_head *first_seq = NULL;
int ret;
u64 delayed_start;
int run_all = count == (unsigned long)-1;
@@ -2436,8 +2435,10 @@ again:
*/
consider_waiting = 1;
num_refs = delayed_refs->num_entries;
+ first_seq = root->fs_info->tree_mod_seq_list.next;
} else {
- wait_for_more_refs(delayed_refs, num_refs);
+ wait_for_more_refs(delayed_refs,
+ num_refs, first_seq);
/*
* after waiting, things have changed. we
* dropped the lock and someone else might have
--
cgit v1.2.3-70-g09d2
From 9345457f4a539a40056431aeb6f068750857472f Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Wed, 27 Jun 2012 15:23:09 +0200
Subject: Btrfs: support root level changes in __resolve_indirect_ref
With the tree mod log, we can have a tree that's two levels high, but
btrfs_search_old_slot may still return a path with the tree root at level
one instead. __resolve_indirect_ref must care for this and accept parents in
a lower level than expected.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
---
fs/btrfs/backref.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 7301cdb4b2c..cf0df904347 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -301,10 +301,14 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
goto out;
eb = path->nodes[level];
- if (!eb) {
- WARN_ON(1);
- ret = 1;
- goto out;
+ while (!eb) {
+ if (!level) {
+ WARN_ON(1);
+ ret = 1;
+ goto out;
+ }
+ level--;
+ eb = path->nodes[level];
}
ret = add_all_parents(root, path, parents, level, &ref->key_for_search,
--
cgit v1.2.3-70-g09d2
From 28da9fb4467f7a650cd31af6dfad3a4e4a3abf6e Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Thu, 21 Jun 2012 10:59:13 +0200
Subject: Btrfs: fix tree mod log for root replacements at leaf level
For the tree mod log, we don't log any operations at leaf level. If the root
is at the leaf level (i.e. the tree consists only of the root), then
__tree_mod_log_oldest_root will find a ROOT_REPLACE operation in the log
(because we always log that one no matter which level), but no other
operations.
With this patch __tree_mod_log_oldest_root exits cleanly instead of
BUGging in this situation. get_old_root checks if its really a root at leaf
level in case we don't have any operations and WARNs if this assumption
breaks.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
---
fs/btrfs/ctree.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 15cbc2bf4ff..7d1e4fc5fb6 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1024,11 +1024,18 @@ __tree_mod_log_oldest_root(struct btrfs_fs_info *fs_info,
if (!looped && !tm)
return 0;
/*
- * we must have key remove operations in the log before the
- * replace operation.
+ * if there are no tree operation for the oldest root, we simply
+ * return it. this should only happen if that (old) root is at
+ * level 0.
*/
- BUG_ON(!tm);
+ if (!tm)
+ break;
+ /*
+ * if there's an operation that's not a root replacement, we
+ * found the oldest version of our root. normally, we'll find a
+ * MOD_LOG_KEY_REMOVE_WHILE_FREEING operation here.
+ */
if (tm->op != MOD_LOG_ROOT_REPLACE)
break;
@@ -1192,16 +1199,8 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
}
tm = tree_mod_log_search(root->fs_info, logical, time_seq);
- /*
- * there was an item in the log when __tree_mod_log_oldest_root
- * returned. this one must not go away, because the time_seq passed to
- * us must be blocking its removal.
- */
- BUG_ON(!tm);
-
if (old_root)
- eb = alloc_dummy_extent_buffer(tm->index << PAGE_CACHE_SHIFT,
- root->nodesize);
+ eb = alloc_dummy_extent_buffer(logical, root->nodesize);
else
eb = btrfs_clone_extent_buffer(root->node);
btrfs_tree_read_unlock(root->node);
@@ -1216,7 +1215,10 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
btrfs_set_header_level(eb, old_root->level);
btrfs_set_header_generation(eb, old_generation);
}
- __tree_mod_log_rewind(eb, time_seq, tm);
+ if (tm)
+ __tree_mod_log_rewind(eb, time_seq, tm);
+ else
+ WARN_ON(btrfs_header_level(eb) != 0);
extent_buffer_get(eb);
return eb;
--
cgit v1.2.3-70-g09d2
From c3e0696523862c48b4d8c73ffb2867e9db478338 Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Thu, 21 Jun 2012 11:01:06 +0200
Subject: Btrfs: always put insert_ptr modifications into the tree mod log
Several callers of insert_ptr set the tree_mod_log parameter to 0 to avoid
addition to the tree mod log. In fact, we need all of those operations. This
commit simply removes the additional parameter and makes addition to the
tree mod log unconditional.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
---
fs/btrfs/ctree.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 7d1e4fc5fb6..e005d9b0461 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2997,7 +2997,7 @@ static noinline int insert_new_root(struct btrfs_trans_handle *trans,
static void insert_ptr(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_disk_key *key, u64 bytenr,
- int slot, int level, int tree_mod_log)
+ int slot, int level)
{
struct extent_buffer *lower;
int nritems;
@@ -3010,7 +3010,7 @@ static void insert_ptr(struct btrfs_trans_handle *trans,
BUG_ON(slot > nritems);
BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(root));
if (slot != nritems) {
- if (tree_mod_log && level)
+ if (level)
tree_mod_log_eb_move(root->fs_info, lower, slot + 1,
slot, nritems - slot);
memmove_extent_buffer(lower,
@@ -3018,7 +3018,7 @@ static void insert_ptr(struct btrfs_trans_handle *trans,
btrfs_node_key_ptr_offset(slot),
(nritems - slot) * sizeof(struct btrfs_key_ptr));
}
- if (tree_mod_log && level) {
+ if (level) {
ret = tree_mod_log_insert_key(root->fs_info, lower, slot,
MOD_LOG_KEY_ADD);
BUG_ON(ret < 0);
@@ -3106,7 +3106,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(split);
insert_ptr(trans, root, path, &disk_key, split->start,
- path->slots[level + 1] + 1, level + 1, 1);
+ path->slots[level + 1] + 1, level + 1);
if (path->slots[level] >= mid) {
path->slots[level] -= mid;
@@ -3643,7 +3643,7 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
btrfs_set_header_nritems(l, mid);
btrfs_item_key(right, &disk_key, 0);
insert_ptr(trans, root, path, &disk_key, right->start,
- path->slots[1] + 1, 1, 0);
+ path->slots[1] + 1, 1);
btrfs_mark_buffer_dirty(right);
btrfs_mark_buffer_dirty(l);
@@ -3850,7 +3850,7 @@ again:
if (mid <= slot) {
btrfs_set_header_nritems(right, 0);
insert_ptr(trans, root, path, &disk_key, right->start,
- path->slots[1] + 1, 1, 0);
+ path->slots[1] + 1, 1);
btrfs_tree_unlock(path->nodes[0]);
free_extent_buffer(path->nodes[0]);
path->nodes[0] = right;
@@ -3859,7 +3859,7 @@ again:
} else {
btrfs_set_header_nritems(right, 0);
insert_ptr(trans, root, path, &disk_key, right->start,
- path->slots[1], 1, 0);
+ path->slots[1], 1);
btrfs_tree_unlock(path->nodes[0]);
free_extent_buffer(path->nodes[0]);
path->nodes[0] = right;
--
cgit v1.2.3-70-g09d2
From 155725c9c051a343be5e555bf943da827e6cf721 Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Fri, 22 Jun 2012 14:01:00 +0200
Subject: Btrfs: leave critical region in btrfs_find_all_roots as soon as
possible
When delayed refs exist, btrfs_find_all_roots used to hold the delayed ref
mutex way longer than actually required. We ought to drop it immediately
after we're done collecting all the delayed refs.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
---
fs/btrfs/backref.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index cf0df904347..a383c18e74e 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -839,6 +839,7 @@ again:
}
ret = __add_delayed_refs(head, delayed_ref_seq,
&prefs_delayed);
+ mutex_unlock(&head->mutex);
if (ret) {
spin_unlock(&delayed_refs->lock);
goto out;
@@ -932,8 +933,6 @@ again:
}
out:
- if (head)
- mutex_unlock(&head->mutex);
btrfs_free_path(path);
while (!list_empty(&prefs)) {
ref = list_first_entry(&prefs, struct __prelim_ref, list);
--
cgit v1.2.3-70-g09d2
From 19956c7e94a7a58d6df8c4db5ae62f9109a7c663 Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Fri, 22 Jun 2012 14:52:13 +0200
Subject: Btrfs: fix tree mod log rewind of ADD operations
When a MOD_LOG_KEY_ADD operation is rewinded, we remove the key from the
tree block. If its not the last key, removal involves a move operation.
This move operation was explicitly done before this commit.
However, at insertion time, there's a move operation before the actual
addition to make room for the new key, which is recorded in the tree mod
log as well. This means, we must drop the move operation when rewinding the
add operation, because the next operation we'll be rewinding will be the
corresponding MOD_LOG_MOVE_KEYS operation.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
---
fs/btrfs/ctree.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index e005d9b0461..b98f8604f4f 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1094,11 +1094,7 @@ __tree_mod_log_rewind(struct extent_buffer *eb, u64 time_seq,
tm->generation);
break;
case MOD_LOG_KEY_ADD:
- if (tm->slot != n - 1) {
- o_dst = btrfs_node_key_ptr_offset(tm->slot);
- o_src = btrfs_node_key_ptr_offset(tm->slot + 1);
- memmove_extent_buffer(eb, o_dst, o_src, p_size);
- }
+ /* if a move operation is needed it's in the log */
n--;
break;
case MOD_LOG_MOVE_KEYS:
--
cgit v1.2.3-70-g09d2
From d42244a0d36ad0939c5f173ebf15841a0678899c Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Fri, 22 Jun 2012 14:51:15 +0200
Subject: Btrfs: resolve tree mod log locking issue in btrfs_next_leaf
With the tree mod log, we may end up with two roots (the current root and a
rewinded version of it) both pointing to two leaves, l1 and l2, of which l2
had already been cow-ed in the current transaction. If we don't rewind any
tree blocks, we cannot have two roots both pointing to an already cowed tree
block.
Now there is btrfs_next_leaf, which has a leaf locked and wants a lock on
the next (right) leaf. And there is push_leaf_left, which has a (cowed!)
leaf locked and wants a lock on the previous (left) leaf.
In order to solve this dead lock situation, we use try_lock in
btrfs_next_leaf (only in case it's called with a tree mod log time_seq
paramter) and if we fail to get a lock on the next leaf, we give up our lock
on the current leaf and retry from the very beginning.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
---
fs/btrfs/ctree.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
(limited to 'fs')
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index b98f8604f4f..8206b390058 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -5119,6 +5119,18 @@ again:
if (!path->skip_locking) {
ret = btrfs_try_tree_read_lock(next);
+ if (!ret && time_seq) {
+ /*
+ * If we don't get the lock, we may be racing
+ * with push_leaf_left, holding that lock while
+ * itself waiting for the leaf we've currently
+ * locked. To solve this situation, we give up
+ * on our lock and cycle.
+ */
+ btrfs_release_path(path);
+ cond_resched();
+ goto again;
+ }
if (!ret) {
btrfs_set_path_blocking(path);
btrfs_tree_read_lock(next);
--
cgit v1.2.3-70-g09d2
From cb14d340ef1737c24125dd663eff77734a482d47 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Wed, 27 Jun 2012 20:08:44 +0200
Subject: udf: Use 'ret' instead of abusing 'i' in udf_load_logicalvol()
Signed-off-by: Jan Kara <jack@suse.cz>
---
fs/udf/super.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
(limited to 'fs')
diff --git a/fs/udf/super.c b/fs/udf/super.c
index ac8a348dcb6..9da6f4ee112 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1233,11 +1233,9 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
BUG_ON(ident != TAG_IDENT_LVD);
lvd = (struct logicalVolDesc *)bh->b_data;
- i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
- if (i != 0) {
- ret = i;
+ ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
+ if (ret)
goto out_bh;
- }
for (i = 0, offset = 0;
i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
--
cgit v1.2.3-70-g09d2
From adee11b2085bee90bd8f4f52123ffb07882d6256 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Wed, 27 Jun 2012 20:20:22 +0200
Subject: udf: Avoid run away loop when partition table length is corrupted
Check provided length of partition table so that (possibly maliciously)
corrupted partition table cannot cause accessing data beyond current buffer.
Signed-off-by: Jan Kara <jack@suse.cz>
---
fs/udf/super.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9da6f4ee112..ce911f50b39 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1225,6 +1225,7 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
struct genericPartitionMap *gpm;
uint16_t ident;
struct buffer_head *bh;
+ unsigned int table_len;
int ret = 0;
bh = udf_read_tagged(sb, block, block, &ident);
@@ -1232,13 +1233,20 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
return 1;
BUG_ON(ident != TAG_IDENT_LVD);
lvd = (struct logicalVolDesc *)bh->b_data;
+ table_len = le32_to_cpu(lvd->mapTableLength);
+ if (sizeof(*lvd) + table_len > sb->s_blocksize) {
+ udf_err(sb, "error loading logical volume descriptor: "
+ "Partition table too long (%u > %lu)\n", table_len,
+ sb->s_blocksize - sizeof(*lvd));
+ goto out_bh;
+ }
ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
if (ret)
goto out_bh;
for (i = 0, offset = 0;
- i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
+ i < sbi->s_partitions && offset < table_len;
i++, offset += gpm->partitionMapLength) {
struct udf_part_map *map = &sbi->s_partmaps[i];
gpm = (struct genericPartitionMap *)
--
cgit v1.2.3-70-g09d2
From 1df2ae31c724e57be9d7ac00d78db8a5dabdd050 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Wed, 27 Jun 2012 21:23:07 +0200
Subject: udf: Fortify loading of sparing table
Add sanity checks when loading sparing table from disk to avoid accessing
unallocated memory or writing to it.
Signed-off-by: Jan Kara <jack@suse.cz>
---
fs/udf/super.c | 86 ++++++++++++++++++++++++++++++++++++----------------------
1 file changed, 53 insertions(+), 33 deletions(-)
(limited to 'fs')
diff --git a/fs/udf/super.c b/fs/udf/super.c
index ce911f50b39..8d86a8706c0 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -56,6 +56,7 @@
#include <linux/seq_file.h>
#include <linux/bitmap.h>
#include <linux/crc-itu-t.h>
+#include <linux/log2.h>
#include <asm/byteorder.h>
#include "udf_sb.h"
@@ -1215,11 +1216,59 @@ out_bh:
return ret;
}
+static int udf_load_sparable_map(struct super_block *sb,
+ struct udf_part_map *map,
+ struct sparablePartitionMap *spm)
+{
+ uint32_t loc;
+ uint16_t ident;
+ struct sparingTable *st;
+ struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
+ int i;
+ struct buffer_head *bh;
+
+ map->s_partition_type = UDF_SPARABLE_MAP15;
+ sdata->s_packet_len = le16_to_cpu(spm->packetLength);
+ if (!is_power_of_2(sdata->s_packet_len)) {
+ udf_err(sb, "error loading logical volume descriptor: "
+ "Invalid packet length %u\n",
+ (unsigned)sdata->s_packet_len);
+ return -EIO;
+ }
+ if (spm->numSparingTables > 4) {
+ udf_err(sb, "error loading logical volume descriptor: "
+ "Too many sparing tables (%d)\n",
+ (int)spm->numSparingTables);
+ return -EIO;
+ }
+
+ for (i = 0; i < spm->numSparingTables; i++) {
+ loc = le32_to_cpu(spm->locSparingTable[i]);
+ bh = udf_read_tagged(sb, loc, loc, &ident);
+ if (!bh)
+ continue;
+
+ st = (struct sparingTable *)bh->b_data;
+ if (ident != 0 ||
+ strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
+ strlen(UDF_ID_SPARING)) ||
+ sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
+ sb->s_blocksize) {
+ brelse(bh);
+ continue;
+ }
+
+ sdata->s_spar_map[i] = bh;
+ }
+ map->s_partition_func = udf_get_pblock_spar15;
+ return 0;
+}
+
static int udf_load_logicalvol(struct super_block *sb, sector_t block,
struct kernel_lb_addr *fileset)
{
struct logicalVolDesc *lvd;
- int i, j, offset;
+ int i, offset;
uint8_t type;
struct udf_sb_info *sbi = UDF_SB(sb);
struct genericPartitionMap *gpm;
@@ -1281,38 +1330,9 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
} else if (!strncmp(upm2->partIdent.ident,
UDF_ID_SPARABLE,
strlen(UDF_ID_SPARABLE))) {
- uint32_t loc;
- struct sparingTable *st;
- struct sparablePartitionMap *spm =
- (struct sparablePartitionMap *)gpm;
-
- map->s_partition_type = UDF_SPARABLE_MAP15;
- map->s_type_specific.s_sparing.s_packet_len =
- le16_to_cpu(spm->packetLength);
- for (j = 0; j < spm->numSparingTables; j++) {
- struct buffer_head *bh2;
-
- loc = le32_to_cpu(
- spm->locSparingTable[j]);
- bh2 = udf_read_tagged(sb, loc, loc,
- &ident);
- map->s_type_specific.s_sparing.
- s_spar_map[j] = bh2;
-
- if (bh2 == NULL)
- continue;
-
- st = (struct sparingTable *)bh2->b_data;
- if (ident != 0 || strncmp(
- st->sparingIdent.ident,
- UDF_ID_SPARING,
- strlen(UDF_ID_SPARING))) {
- brelse(bh2);
- map->s_type_specific.s_sparing.
- s_spar_map[j] = NULL;
- }
- }
- map->s_partition_func = udf_get_pblock_spar15;
+ if (udf_load_sparable_map(sb, map,
+ (struct sparablePartitionMap *)gpm) < 0)
+ goto out_bh;
} else if (!strncmp(upm2->partIdent.ident,
UDF_ID_METADATA,
strlen(UDF_ID_METADATA))) {
--
cgit v1.2.3-70-g09d2
From 597a60fadedf9a40fdff8735054bf772b3dafd57 Mon Sep 17 00:00:00 2001
From: Stefan Behrens <sbehrens@giantdisaster.de>
Date: Thu, 14 Jun 2012 16:42:31 +0200
Subject: Btrfs: don't count I/O statistic read errors for missing devices
It is normal behaviour of the low level btrfs function btrfs_map_bio()
to complete a bio with -EIO if the device is missing, instead of just
preventing the bio creation in an earlier step.
This used to cause I/O statistic read error increments and annoying
printk_ratelimited messages. This commit fixes the issue.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Reported-by: Carey Underwood <cwillu@cwillu.com>
---
fs/btrfs/volumes.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 8a3d2594b80..3f292cf693a 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4061,16 +4061,18 @@ static void btrfs_end_bio(struct bio *bio, int err)
BUG_ON(stripe_index >= bbio->num_stripes);
dev = bbio->stripes[stripe_index].dev;
- if (bio->bi_rw & WRITE)
- btrfs_dev_stat_inc(dev,
- BTRFS_DEV_STAT_WRITE_ERRS);
- else
- btrfs_dev_stat_inc(dev,
- BTRFS_DEV_STAT_READ_ERRS);
- if ((bio->bi_rw & WRITE_FLUSH) == WRITE_FLUSH)
- btrfs_dev_stat_inc(dev,
- BTRFS_DEV_STAT_FLUSH_ERRS);
- btrfs_dev_stat_print_on_error(dev);
+ if (dev->bdev) {
+ if (bio->bi_rw & WRITE)
+ btrfs_dev_stat_inc(dev,
+ BTRFS_DEV_STAT_WRITE_ERRS);
+ else
+ btrfs_dev_stat_inc(dev,
+ BTRFS_DEV_STAT_READ_ERRS);
+ if ((bio->bi_rw & WRITE_FLUSH) == WRITE_FLUSH)
+ btrfs_dev_stat_inc(dev,
+ BTRFS_DEV_STAT_FLUSH_ERRS);
+ btrfs_dev_stat_print_on_error(dev);
+ }
}
}
--
cgit v1.2.3-70-g09d2
From c3473e830074ef04f974f2829690942dd8580619 Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@redhat.com>
Date: Tue, 19 Jun 2012 10:59:00 -0400
Subject: Btrfs: fix dio write vs buffered read race
Miao pointed out there's a problem with mixing dio writes and buffered
reads. If the read happens between us invalidating the page range and
actually locking the extent we can bring in pages into page cache. Then
once the write finishes if somebody tries to read again it will just find
uptodate pages and we'll read stale data. So we need to lock the extent and
check for uptodate bits in the range. If there are uptodate bits we need to
unlock and invalidate again. This will keep this race from happening since
we will hold the extent locked until we create the ordered extent, and then
teh read side always waits for ordered extents. There was also a race in
how we updated i_size, previously we were relying on the generic DIO stuff
to adjust the i_size after the DIO had completed, but this happens outside
of the extent lock which means reads could come in and not see the updated
i_size. So instead move this work into where we create the extents, and
then this way the update ordered i_size stuff works properly in the endio
handlers. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
---
fs/btrfs/file.c | 13 -------------
fs/btrfs/inode.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++-----
2 files changed, 50 insertions(+), 18 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 876cddd6b2f..248d2026524 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1334,7 +1334,6 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
loff_t *ppos, size_t count, size_t ocount)
{
struct file *file = iocb->ki_filp;
- struct inode *inode = fdentry(file)->d_inode;
struct iov_iter i;
ssize_t written;
ssize_t written_buffered;
@@ -1344,18 +1343,6 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
written = generic_file_direct_write(iocb, iov, &nr_segs, pos, ppos,
count, ocount);
- /*
- * the generic O_DIRECT will update in-memory i_size after the
- * DIOs are done. But our endio handlers that update the on
- * disk i_size never update past the in memory i_size. So we
- * need one more update here to catch any additions to the
- * file
- */
- if (inode->i_size != BTRFS_I(inode)->disk_i_size) {
- btrfs_ordered_update_i_size(inode, inode->i_size, NULL);
- mark_inode_dirty(inode);
- }
-
if (written < 0 || written == count)
return written;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4a4f2d59a64..6971fb5fc85 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5904,8 +5904,17 @@ map:
bh_result->b_size = len;
bh_result->b_bdev = em->bdev;
set_buffer_mapped(bh_result);
- if (create && !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
- set_buffer_new(bh_result);
+ if (create) {
+ if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
+ set_buffer_new(bh_result);
+
+ /*
+ * Need to update the i_size under the extent lock so buffered
+ * readers will get the updated i_size when we unlock.
+ */
+ if (start + len > i_size_read(inode))
+ i_size_write(inode, start + len);
+ }
free_extent_map(em);
@@ -6388,12 +6397,48 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
*/
ordered = btrfs_lookup_ordered_range(inode, lockstart,
lockend - lockstart + 1);
- if (!ordered)
+
+ /*
+ * We need to make sure there are no buffered pages in this
+ * range either, we could have raced between the invalidate in
+ * generic_file_direct_write and locking the extent. The
+ * invalidate needs to happen so that reads after a write do not
+ * get stale data.
+ */
+ if (!ordered && (!writing ||
+ !test_range_bit(&BTRFS_I(inode)->io_tree,
+ lockstart, lockend, EXTENT_UPTODATE, 0,
+ cached_state)))
break;
+
unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
&cached_state, GFP_NOFS);
- btrfs_start_ordered_extent(inode, ordered, 1);
- btrfs_put_ordered_extent(ordered);
+
+ if (ordered) {
+ btrfs_start_ordered_extent(inode, ordered, 1);
+ btrfs_put_ordered_extent(ordered);
+ } else {
+ /* Screw you mmap */
+ ret = filemap_write_and_wait_range(file->f_mapping,
+ lockstart,
+ lockend);
+ if (ret)
+ goto out;
+
+ /*
+ * If we found a page that couldn't be invalidated just
+ * fall back to buffered.
+ */
+ ret = invalidate_inode_pages2_range(file->f_mapping,
+ lockstart >> PAGE_CACHE_SHIFT,
+ lockend >> PAGE_CACHE_SHIFT);
+ if (ret) {
+ if (ret == -EBUSY)
+ ret = 0;
+ goto out;
+ }
+ }
+
cond_resched();
}
--
cgit v1.2.3-70-g09d2
From 68310a5e42f93c2242ec1836c3b18d531e0065e2 Mon Sep 17 00:00:00 2001
From: Ilya Dryomov <idryomov@gmail.com>
Date: Fri, 22 Jun 2012 12:24:12 -0600
Subject: Btrfs: restore restriper state on all mounts
Fix a bug that triggered asserts in btrfs_balance() in both normal and
resume modes -- restriper state was not properly restored on read-only
mounts. This factors out resuming code from btrfs_restore_balance(),
which is now also called earlier in the mount sequence to avoid the
problem of some early writes getting the old profile.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
fs/btrfs/disk-io.c | 10 ++++++----
fs/btrfs/volumes.c | 39 +++++++++++++++++++--------------------
fs/btrfs/volumes.h | 2 +-
3 files changed, 26 insertions(+), 25 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 7d7bc8eace8..3a7961ba161 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2354,12 +2354,17 @@ retry_root_backup:
BTRFS_CSUM_TREE_OBJECTID, csum_root);
if (ret)
goto recovery_tree_root;
-
csum_root->track_dirty = 1;
fs_info->generation = generation;
fs_info->last_trans_committed = generation;
+ ret = btrfs_recover_balance(fs_info);
+ if (ret) {
+ printk(KERN_WARNING "btrfs: failed to recover balance\n");
+ goto fail_block_groups;
+ }
+
ret = btrfs_init_dev_stats(fs_info);
if (ret) {
printk(KERN_ERR "btrfs: failed to init dev_stats: %d\n",
@@ -2492,9 +2497,6 @@ retry_root_backup:
err = btrfs_orphan_cleanup(fs_info->tree_root);
up_read(&fs_info->cleanup_work_sem);
- if (!err)
- err = btrfs_recover_balance(fs_info->tree_root);
-
if (err) {
close_ctree(tree_root);
return err;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 3f292cf693a..48943d0f861 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2867,9 +2867,8 @@ static int balance_kthread(void *data)
return ret;
}
-int btrfs_recover_balance(struct btrfs_root *tree_root)
+int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
{
- struct task_struct *tsk;
struct btrfs_balance_control *bctl;
struct btrfs_balance_item *item;
struct btrfs_disk_balance_args disk_bargs;
@@ -2882,29 +2881,30 @@ int btrfs_recover_balance(struct btrfs_root *tree_root)
if (!path)
return -ENOMEM;
- bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
- if (!bctl) {
- ret = -ENOMEM;
- goto out;
- }
-
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_BALANCE_ITEM_KEY;
key.offset = 0;
- ret = btrfs_search_slot(NULL, tree_root, &key, path, 0, 0);
+ ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0);
if (ret < 0)
- goto out_bctl;
+ goto out;
if (ret > 0) { /* ret = -ENOENT; */
ret = 0;
- goto out_bctl;
+ goto out;
+ }
+
+ bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
+ if (!bctl) {
+ ret = -ENOMEM;
+ goto out;
}
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_balance_item);
- bctl->fs_info = tree_root->fs_info;
- bctl->flags = btrfs_balance_flags(leaf, item) | BTRFS_BALANCE_RESUME;
+ bctl->fs_info = fs_info;
+ bctl->flags = btrfs_balance_flags(leaf, item);
+ bctl->flags |= BTRFS_BALANCE_RESUME;
btrfs_balance_data(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->data, &disk_bargs);
@@ -2913,14 +2913,13 @@ int btrfs_recover_balance(struct btrfs_root *tree_root)
btrfs_balance_sys(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->sys, &disk_bargs);
- tsk = kthread_run(balance_kthread, bctl, "btrfs-balance");
- if (IS_ERR(tsk))
- ret = PTR_ERR(tsk);
- else
- goto out;
+ mutex_lock(&fs_info->volume_mutex);
+ mutex_lock(&fs_info->balance_mutex);
-out_bctl:
- kfree(bctl);
+ set_balance_control(bctl);
+
+ mutex_unlock(&fs_info->balance_mutex);
+ mutex_unlock(&fs_info->volume_mutex);
out:
btrfs_free_path(path);
return ret;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 74366f27a76..e1b1a649fc5 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -281,7 +281,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
int btrfs_init_new_device(struct btrfs_root *root, char *path);
int btrfs_balance(struct btrfs_balance_control *bctl,
struct btrfs_ioctl_balance_args *bargs);
-int btrfs_recover_balance(struct btrfs_root *tree_root);
+int btrfs_recover_balance(struct btrfs_fs_info *fs_info);
int btrfs_pause_balance(struct btrfs_fs_info *fs_info);
int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
--
cgit v1.2.3-70-g09d2
From 2b6ba629b5aac51e7099efbb43e2b403213aa7fb Mon Sep 17 00:00:00 2001
From: Ilya Dryomov <idryomov@gmail.com>
Date: Fri, 22 Jun 2012 12:24:13 -0600
Subject: Btrfs: resume balance on rw (re)mounts properly
This introduces btrfs_resume_balance_async(), which, given that
restriper state was recovered earlier by btrfs_recover_balance(),
resumes balance in btrfs-balance kthread.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
fs/btrfs/disk-io.c | 24 +++++++++++++++---------
fs/btrfs/super.c | 4 ++++
fs/btrfs/volumes.c | 36 +++++++++++++++++++++++++++---------
fs/btrfs/volumes.h | 1 +
4 files changed, 47 insertions(+), 18 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 3a7961ba161..8cc47103a32 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2490,17 +2490,23 @@ retry_root_backup:
goto fail_trans_kthread;
}
- if (!(sb->s_flags & MS_RDONLY)) {
- down_read(&fs_info->cleanup_work_sem);
- err = btrfs_orphan_cleanup(fs_info->fs_root);
- if (!err)
- err = btrfs_orphan_cleanup(fs_info->tree_root);
+ if (sb->s_flags & MS_RDONLY)
+ return 0;
+
+ down_read(&fs_info->cleanup_work_sem);
+ if ((ret = btrfs_orphan_cleanup(fs_info->fs_root)) ||
+ (ret = btrfs_orphan_cleanup(fs_info->tree_root))) {
up_read(&fs_info->cleanup_work_sem);
+ close_ctree(tree_root);
+ return ret;
+ }
+ up_read(&fs_info->cleanup_work_sem);
- if (err) {
- close_ctree(tree_root);
- return err;
- }
+ ret = btrfs_resume_balance_async(fs_info);
+ if (ret) {
+ printk(KERN_WARNING "btrfs: failed to resume balance\n");
+ close_ctree(tree_root);
+ return ret;
}
return 0;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 0eb9a4da069..e23991574fd 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1187,6 +1187,10 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
if (ret)
goto restore;
+ ret = btrfs_resume_balance_async(fs_info);
+ if (ret)
+ goto restore;
+
sb->s_flags &= ~MS_RDONLY;
}
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 48943d0f861..ecaad40e7ef 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2845,28 +2845,46 @@ out:
static int balance_kthread(void *data)
{
- struct btrfs_balance_control *bctl =
- (struct btrfs_balance_control *)data;
- struct btrfs_fs_info *fs_info = bctl->fs_info;
+ struct btrfs_fs_info *fs_info = data;
int ret = 0;
mutex_lock(&fs_info->volume_mutex);
mutex_lock(&fs_info->balance_mutex);
- set_balance_control(bctl);
-
- if (btrfs_test_opt(fs_info->tree_root, SKIP_BALANCE)) {
- printk(KERN_INFO "btrfs: force skipping balance\n");
- } else {
+ if (fs_info->balance_ctl) {
printk(KERN_INFO "btrfs: continuing balance\n");
- ret = btrfs_balance(bctl, NULL);
+ ret = btrfs_balance(fs_info->balance_ctl, NULL);
}
mutex_unlock(&fs_info->balance_mutex);
mutex_unlock(&fs_info->volume_mutex);
+
return ret;
}
+int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info)
+{
+ struct task_struct *tsk;
+
+ spin_lock(&fs_info->balance_lock);
+ if (!fs_info->balance_ctl) {
+ spin_unlock(&fs_info->balance_lock);
+ return 0;
+ }
+ spin_unlock(&fs_info->balance_lock);
+
+ if (btrfs_test_opt(fs_info->tree_root, SKIP_BALANCE)) {
+ printk(KERN_INFO "btrfs: force skipping balance\n");
+ return 0;
+ }
+
+ tsk = kthread_run(balance_kthread, fs_info, "btrfs-balance");
+ if (IS_ERR(tsk))
+ return PTR_ERR(tsk);
+
+ return 0;
+}
+
int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
{
struct btrfs_balance_control *bctl;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index e1b1a649fc5..95f6637614d 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -281,6 +281,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
int btrfs_init_new_device(struct btrfs_root *root, char *path);
int btrfs_balance(struct btrfs_balance_control *bctl,
struct btrfs_ioctl_balance_args *bargs);
+int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info);
int btrfs_recover_balance(struct btrfs_fs_info *fs_info);
int btrfs_pause_balance(struct btrfs_fs_info *fs_info);
int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
--
cgit v1.2.3-70-g09d2
From d3a94048c912e18e99a091d5ea2d0a1178152d6f Mon Sep 17 00:00:00 2001
From: Alexander Block <ablock84@googlemail.com>
Date: Mon, 25 Jun 2012 15:36:12 -0600
Subject: Btrfs: use _IOR for BTRFS_IOC_SUBVOL_GETFLAGS
We used the wrong ioctl macro for the getflags ioctl before.
As we don't have the set/getflags ioctls in the user space ioctl.h
at the moment, it's safe to fix it now.
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Alexander Block <ablock84@googlemail.com>
---
fs/btrfs/ioctl.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 497c530724c..e440aa653c3 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -339,7 +339,7 @@ struct btrfs_ioctl_get_dev_stats {
#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
struct btrfs_ioctl_vol_args_v2)
-#define BTRFS_IOC_SUBVOL_GETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 25, __u64)
+#define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
#define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
#define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
struct btrfs_ioctl_scrub_args)
--
cgit v1.2.3-70-g09d2
From 6bf02314d9a5c29f6ec30285b9ad5361c2d4c85a Mon Sep 17 00:00:00 2001
From: Liu Bo <liubo2009@cn.fujitsu.com>
Date: Mon, 25 Jun 2012 21:59:09 -0600
Subject: Btrfs: fix wrong check during log recovery
When we're evicting an inode during log recovery, we need to ensure that the inode
is not in orphan state any more, which means inode's run_time flags has _no_
BTRFS_INODE_HAS_ORPHAN_ITEM. Thus, the BUG_ON was triggered because of a wrong
check for the flags.
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
fs/btrfs/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6971fb5fc85..9f07bd121f6 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3754,7 +3754,7 @@ void btrfs_evict_inode(struct inode *inode)
btrfs_wait_ordered_range(inode, 0, (u64)-1);
if (root->fs_info->log_root_recovering) {
- BUG_ON(!test_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
+ BUG_ON(test_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
&BTRFS_I(inode)->runtime_flags));
goto no_delete;
}
--
cgit v1.2.3-70-g09d2
From bdb7d303b33c1648514c9f9461d7513a4c05ce48 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fusionio.com>
Date: Wed, 27 Jun 2012 15:10:56 -0400
Subject: Btrfs: fix tree log remove space corner case
The tree log stuff can have allocated space that we end up having split
across a bitmap and a real extent. The free space code does not deal with
this, it assumes that if it finds an extent or bitmap entry that the entire
range must fall within the entry it finds. This isn't necessarily the case,
so rework the remove function so it can handle this case properly. This
fixed two panics the user hit, first in the case where the space was
initially in a bitmap and then in an extent entry, and then the reverse
case. Thanks,
Reported-and-tested-by: Shaun Reich <sreich@kde.org>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
fs/btrfs/free-space-cache.c | 145 ++++++++++++++++----------------------------
1 file changed, 52 insertions(+), 93 deletions(-)
(limited to 'fs')
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 19a0d85b451..a70c54e2e1b 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1542,29 +1542,26 @@ again:
end = bitmap_info->offset + (u64)(BITS_PER_BITMAP * ctl->unit) - 1;
/*
- * XXX - this can go away after a few releases.
- *
- * since the only user of btrfs_remove_free_space is the tree logging
- * stuff, and the only way to test that is under crash conditions, we
- * want to have this debug stuff here just in case somethings not
- * working. Search the bitmap for the space we are trying to use to
- * make sure its actually there. If its not there then we need to stop
- * because something has gone wrong.
+ * We need to search for bits in this bitmap. We could only cover some
+ * of the extent in this bitmap thanks to how we add space, so we need
+ * to search for as much as it as we can and clear that amount, and then
+ * go searching for the next bit.
*/
search_start = *offset;
- search_bytes = *bytes;
+ search_bytes = ctl->unit;
search_bytes = min(search_bytes, end - search_start + 1);
ret = search_bitmap(ctl, bitmap_info, &search_start, &search_bytes);
BUG_ON(ret < 0 || search_start != *offset);
- if (*offset > bitmap_info->offset && *offset + *bytes > end) {
- bitmap_clear_bits(ctl, bitmap_info, *offset, end - *offset + 1);
- *bytes -= end - *offset + 1;
- *offset = end + 1;
- } else if (*offset >= bitmap_info->offset && *offset + *bytes <= end) {
- bitmap_clear_bits(ctl, bitmap_info, *offset, *bytes);
- *bytes = 0;
- }
+ /* We may have found more bits than what we need */
+ search_bytes = min(search_bytes, *bytes);
+
+ /* Cannot clear past the end of the bitmap */
+ search_bytes = min(search_bytes, end - search_start + 1);
+
+ bitmap_clear_bits(ctl, bitmap_info, search_start, search_bytes);
+ *offset += search_bytes;
+ *bytes -= search_bytes;
if (*bytes) {
struct rb_node *next = rb_next(&bitmap_info->offset_index);
@@ -1595,7 +1592,7 @@ again:
* everything over again.
*/
search_start = *offset;
- search_bytes = *bytes;
+ search_bytes = ctl->unit;
ret = search_bitmap(ctl, bitmap_info, &search_start,
&search_bytes);
if (ret < 0 || search_start != *offset)
@@ -1878,12 +1875,14 @@ int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
{
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct btrfs_free_space *info;
- struct btrfs_free_space *next_info = NULL;
int ret = 0;
spin_lock(&ctl->tree_lock);
again:
+ if (!bytes)
+ goto out_lock;
+
info = tree_search_offset(ctl, offset, 0, 0);
if (!info) {
/*
@@ -1904,88 +1903,48 @@ again:
}
}
- if (info->bytes < bytes && rb_next(&info->offset_index)) {
- u64 end;
- next_info = rb_entry(rb_next(&info->offset_index),
- struct btrfs_free_space,
- offset_index);
-
- if (next_info->bitmap)
- end = next_info->offset +
- BITS_PER_BITMAP * ctl->unit - 1;
- else
- end = next_info->offset + next_info->bytes;
-
- if (next_info->bytes < bytes ||
- next_info->offset > offset || offset > end) {
- printk(KERN_CRIT "Found free space at %llu, size %llu,"
- " trying to use %llu\n",
- (unsigned long long)info->offset,
- (unsigned long long)info->bytes,
- (unsigned long long)bytes);
- WARN_ON(1);
- ret = -EINVAL;
- goto out_lock;
- }
-
- info = next_info;
- }
-
- if (info->bytes == bytes) {
+ if (!info->bitmap) {
unlink_free_space(ctl, info);
- if (info->bitmap) {
- kfree(info->bitmap);
- ctl->total_bitmaps--;
- }
- kmem_cache_free(btrfs_free_space_cachep, info);
- ret = 0;
- goto out_lock;
- }
-
- if (!info->bitmap && info->offset == offset) {
- unlink_free_space(ctl, info);
- info->offset += bytes;
- info->bytes -= bytes;
- ret = link_free_space(ctl, info);
- WARN_ON(ret);
- goto out_lock;
- }
+ if (offset == info->offset) {
+ u64 to_free = min(bytes, info->bytes);
+
+ info->bytes -= to_free;
+ info->offset += to_free;
+ if (info->bytes) {
+ ret = link_free_space(ctl, info);
+ WARN_ON(ret);
+ } else {
+ kmem_cache_free(btrfs_free_space_cachep, info);
+ }
- if (!info->bitmap && info->offset <= offset &&
- info->offset + info->bytes >= offset + bytes) {
- u64 old_start = info->offset;
- /*
- * we're freeing space in the middle of the info,
- * this can happen during tree log replay
- *
- * first unlink the old info and then
- * insert it again after the hole we're creating
- */
- unlink_free_space(ctl, info);
- if (offset + bytes < info->offset + info->bytes) {
- u64 old_end = info->offset + info->bytes;
+ offset += to_free;
+ bytes -= to_free;
+ goto again;
+ } else {
+ u64 old_end = info->bytes + info->offset;
- info->offset = offset + bytes;
- info->bytes = old_end - info->offset;
+ info->bytes = offset - info->offset;
ret = link_free_space(ctl, info);
WARN_ON(ret);
if (ret)
goto out_lock;
- } else {
- /* the hole we're creating ends at the end
- * of the info struct, just free the info
- */
- kmem_cache_free(btrfs_free_space_cachep, info);
- }
- spin_unlock(&ctl->tree_lock);
- /* step two, insert a new info struct to cover
- * anything before the hole
- */
- ret = btrfs_add_free_space(block_group, old_start,
- offset - old_start);
- WARN_ON(ret); /* -ENOMEM */
- goto out;
+ /* Not enough bytes in this entry to satisfy us */
+ if (old_end < offset + bytes) {
+ bytes -= old_end - offset;
+ offset = old_end;
+ goto again;
+ } else if (old_end == offset + bytes) {
+ /* all done */
+ goto out_lock;
+ }
+ spin_unlock(&ctl->tree_lock);
+
+ ret = btrfs_add_free_space(block_group, offset + bytes,
+ old_end - (offset + bytes));
+ WARN_ON(ret);
+ goto out;
+ }
}
ret = remove_from_bitmap(ctl, info, &offset, &bytes);
--
cgit v1.2.3-70-g09d2
From 7fd1a3f73f3743b4ffd520effe288a70b0ec47c9 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fusionio.com>
Date: Wed, 27 Jun 2012 17:18:41 -0400
Subject: Btrfs: hold a ref on the inode during writepages
We can race with unlink and not actually be able to do our igrab in
btrfs_add_ordered_extent. This will result in all sorts of problems.
Instead of doing the complicated work to try and handle returning an error
properly from btrfs_add_ordered_extent, just hold a ref to the inode during
writepages. If we cannot grab a ref we know we're freeing this inode anyway
and can just drop the dirty pages on the floor, because screw them we're
going to invalidate them anyway. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
fs/btrfs/extent_io.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
(limited to 'fs')
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index aaa12c1eb34..01c21b6c6d4 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3324,6 +3324,7 @@ static int extent_write_cache_pages(struct extent_io_tree *tree,
writepage_t writepage, void *data,
void (*flush_fn)(void *))
{
+ struct inode *inode = mapping->host;
int ret = 0;
int done = 0;
int nr_to_write_done = 0;
@@ -3334,6 +3335,18 @@ static int extent_write_cache_pages(struct extent_io_tree *tree,
int scanned = 0;
int tag;
+ /*
+ * We have to hold onto the inode so that ordered extents can do their
+ * work when the IO finishes. The alternative to this is failing to add
+ * an ordered extent if the igrab() fails there and that is a huge pain
+ * to deal with, so instead just hold onto the inode throughout the
+ * writepages operation. If it fails here we are freeing up the inode
+ * anyway and we'd rather not waste our time writing out stuff that is
+ * going to be truncated anyway.
+ */
+ if (!igrab(inode))
+ return 0;
+
pagevec_init(&pvec, 0);
if (wbc->range_cyclic) {
index = mapping->writeback_index; /* Start from prev offset */
@@ -3428,6 +3441,7 @@ retry:
index = 0;
goto retry;
}
+ btrfs_add_delayed_iput(inode);
return ret;
}
--
cgit v1.2.3-70-g09d2
From b6305567e7d31b0bec1b8cb9ec0cadd7f7086f5f Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@fusionio.com>
Date: Mon, 2 Jul 2012 15:29:53 -0400
Subject: Btrfs: run delayed directory updates during log replay
While we are resolving directory modifications in the
tree log, we are triggering delayed metadata updates to
the filesystem btrees.
This commit forces the delayed updates to run so the
replay code can find any modifications done. It stops
us from crashing because the directory deleltion replay
expects items to be removed immediately from the tree.
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
cc: stable@kernel.org
---
fs/btrfs/tree-log.c | 6 ++++++
1 file changed, 6 insertions(+)
(limited to 'fs')
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 2017d0ff511..8abeae4224f 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -690,6 +690,8 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans,
kfree(name);
iput(inode);
+
+ btrfs_run_delayed_items(trans, root);
return ret;
}
@@ -895,6 +897,7 @@ again:
ret = btrfs_unlink_inode(trans, root, dir,
inode, victim_name,
victim_name_len);
+ btrfs_run_delayed_items(trans, root);
}
kfree(victim_name);
ptr = (unsigned long)(victim_ref + 1) + victim_name_len;
@@ -1475,6 +1478,9 @@ again:
ret = btrfs_unlink_inode(trans, root, dir, inode,
name, name_len);
BUG_ON(ret);
+
+ btrfs_run_delayed_items(trans, root);
+
kfree(name);
iput(inode);
--
cgit v1.2.3-70-g09d2
From ec01d738a1691dfc85b96b9f796020267a7be577 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@redhat.com>
Date: Mon, 2 Jul 2012 07:24:25 -0400
Subject: cifs: when server doesn't set CAP_LARGE_READ_X, cap default rsize at
MaxBufferSize
When the server doesn't advertise CAP_LARGE_READ_X, then MS-CIFS states
that you must cap the size of the read at the client's MaxBufferSize.
Unfortunately, testing with many older servers shows that they often
can't service a read larger than their own MaxBufferSize.
Since we can't assume what the server will do in this situation, we must
be conservative here for the default. When the server can't do large
reads, then assume that it can't satisfy any read larger than its
MaxBufferSize either.
Luckily almost all modern servers can do large reads, so this won't
affect them. This is really just for older win9x and OS/2 era servers.
Also, note that this patch just governs the default rsize. The admin can
always override this if he so chooses.
Cc: <stable@vger.kernel.org> # 3.2
Reported-by: David H. Durgee <dhdurgee@acm.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steven French <sfrench@w500smf.(none)>
---
fs/cifs/connect.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
(limited to 'fs')
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5b3840725d0..0ae86ddf221 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3495,18 +3495,15 @@ cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info)
* MS-CIFS indicates that servers are only limited by the client's
* bufsize for reads, testing against win98se shows that it throws
* INVALID_PARAMETER errors if you try to request too large a read.
+ * OS/2 just sends back short reads.
*
- * If the server advertises a MaxBufferSize of less than one page,
- * assume that it also can't satisfy reads larger than that either.
- *
- * FIXME: Is there a better heuristic for this?
+ * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
+ * it can't handle a read request larger than its MaxBufferSize either.
*/
if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
defsize = CIFS_DEFAULT_IOSIZE;
else if (server->capabilities & CAP_LARGE_READ_X)
defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
- else if (server->maxBuf >= PAGE_CACHE_SIZE)
- defsize = CIFSMaxBufSize;
else
defsize = server->maxBuf - sizeof(READ_RSP);
--
cgit v1.2.3-70-g09d2
From 9fe79d7600497ed8a95c3981cbe5b73ab98222f0 Mon Sep 17 00:00:00 2001
From: Tyler Hicks <tyhicks@canonical.com>
Date: Tue, 12 Jun 2012 11:17:01 -0700
Subject: eCryptfs: Properly check for O_RDONLY flag before doing privileged
open
If the first attempt at opening the lower file read/write fails,
eCryptfs will retry using a privileged kthread. However, the privileged
retry should not happen if the lower file's inode is read-only because a
read/write open will still be unsuccessful.
The check for determining if the open should be retried was intended to
be based on the access mode of the lower file's open flags being
O_RDONLY, but the check was incorrectly performed. This would cause the
open to be retried by the privileged kthread, resulting in a second
failed open of the lower file. This patch corrects the check to
determine if the open request should be handled by the privileged
kthread.
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
---
fs/ecryptfs/kthread.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index 69f994a7d52..0dbe58a8b17 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -149,7 +149,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
(*lower_file) = dentry_open(lower_dentry, lower_mnt, flags, cred);
if (!IS_ERR(*lower_file))
goto out;
- if (flags & O_RDONLY) {
+ if ((flags & O_ACCMODE) == O_RDONLY) {
rc = PTR_ERR((*lower_file));
goto out;
}
--
cgit v1.2.3-70-g09d2
From 60d65f1f07a7d81d3eb3b91fc13fca80f2fdbb12 Mon Sep 17 00:00:00 2001
From: Tyler Hicks <tyhicks@canonical.com>
Date: Mon, 11 Jun 2012 10:21:34 -0700
Subject: eCryptfs: Fix lockdep warning in miscdev operations
Don't grab the daemon mutex while holding the message context mutex.
Addresses this lockdep warning:
ecryptfsd/2141 is trying to acquire lock:
(&ecryptfs_msg_ctx_arr[i].mux){+.+.+.}, at: [<ffffffffa029c213>] ecryptfs_miscdev_read+0x143/0x470 [ecryptfs]
but task is already holding lock:
(&(*daemon)->mux){+.+...}, at: [<ffffffffa029c2ec>] ecryptfs_miscdev_read+0x21c/0x470 [ecryptfs]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&(*daemon)->mux){+.+...}:
[<ffffffff810a3b8d>] lock_acquire+0x9d/0x220
[<ffffffff8151c6da>] __mutex_lock_common+0x5a/0x4b0
[<ffffffff8151cc64>] mutex_lock_nested+0x44/0x50
[<ffffffffa029c5d7>] ecryptfs_send_miscdev+0x97/0x120 [ecryptfs]
[<ffffffffa029b744>] ecryptfs_send_message+0x134/0x1e0 [ecryptfs]
[<ffffffffa029a24e>] ecryptfs_generate_key_packet_set+0x2fe/0xa80 [ecryptfs]
[<ffffffffa02960f8>] ecryptfs_write_metadata+0x108/0x250 [ecryptfs]
[<ffffffffa0290f80>] ecryptfs_create+0x130/0x250 [ecryptfs]
[<ffffffff811963a4>] vfs_create+0xb4/0x120
[<ffffffff81197865>] do_last+0x8c5/0xa10
[<ffffffff811998f9>] path_openat+0xd9/0x460
[<ffffffff81199da2>] do_filp_open+0x42/0xa0
[<ffffffff81187998>] do_sys_open+0xf8/0x1d0
[<ffffffff81187a91>] sys_open+0x21/0x30
[<ffffffff81527d69>] system_call_fastpath+0x16/0x1b
-> #0 (&ecryptfs_msg_ctx_arr[i].mux){+.+.+.}:
[<ffffffff810a3418>] __lock_acquire+0x1bf8/0x1c50
[<ffffffff810a3b8d>] lock_acquire+0x9d/0x220
[<ffffffff8151c6da>] __mutex_lock_common+0x5a/0x4b0
[<ffffffff8151cc64>] mutex_lock_nested+0x44/0x50
[<ffffffffa029c213>] ecryptfs_miscdev_read+0x143/0x470 [ecryptfs]
[<ffffffff811887d3>] vfs_read+0xb3/0x180
[<ffffffff811888ed>] sys_read+0x4d/0x90
[<ffffffff81527d69>] system_call_fastpath+0x16/0x1b
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
---
fs/ecryptfs/miscdev.c | 25 +++++++++++++------------
1 file changed, 13 insertions(+), 12 deletions(-)
(limited to 'fs')
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index 3a06f4043df..3c632ec412e 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -191,31 +191,32 @@ int ecryptfs_send_miscdev(char *data, size_t data_size,
struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
u16 msg_flags, struct ecryptfs_daemon *daemon)
{
- int rc = 0;
+ struct ecryptfs_message *msg;
- mutex_lock(&msg_ctx->mux);
- msg_ctx->msg = kmalloc((sizeof(*msg_ctx->msg) + data_size),
- GFP_KERNEL);
- if (!msg_ctx->msg) {
- rc = -ENOMEM;
+ msg = kmalloc((sizeof(*msg) + data_size), GFP_KERNEL);
+ if (!msg) {
printk(KERN_ERR "%s: Out of memory whilst attempting "
"to kmalloc(%zd, GFP_KERNEL)\n", __func__,
- (sizeof(*msg_ctx->msg) + data_size));
- goto out_unlock;
+ (sizeof(*msg) + data_size));
+ return -ENOMEM;
}
+
+ mutex_lock(&msg_ctx->mux);
+ msg_ctx->msg = msg;
msg_ctx->msg->index = msg_ctx->index;
msg_ctx->msg->data_len = data_size;
msg_ctx->type = msg_type;
memcpy(msg_ctx->msg->data, data, data_size);
msg_ctx->msg_size = (sizeof(*msg_ctx->msg) + data_size);
- mutex_lock(&daemon->mux);
list_add_tail(&msg_ctx->daemon_out_list, &daemon->msg_ctx_out_queue);
+ mutex_unlock(&msg_ctx->mux);
+
+ mutex_lock(&daemon->mux);
daemon->num_queued_msg_ctx++;
wake_up_interruptible(&daemon->wait);
mutex_unlock(&daemon->mux);
-out_unlock:
- mutex_unlock(&msg_ctx->mux);
- return rc;
+
+ return 0;
}
/*
--
cgit v1.2.3-70-g09d2
From 3e5d3c35a68c9a933bdbdd8685bd1a205b57e806 Mon Sep 17 00:00:00 2001
From: Junxiao Bi <junxiao.bi@oracle.com>
Date: Wed, 27 Jun 2012 17:09:55 +0800
Subject: ocfs2: clear unaligned io flag when dio fails
The unaligned io flag is set in the kiocb when an unaligned
dio is issued, it should be cleared even when the dio fails,
or it may affect the following io which are using the same
kiocb.
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Joel Becker <jlbec@evilplan.org>
---
fs/ocfs2/file.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 061591a3ab0..98513c8ed58 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2422,8 +2422,10 @@ out_dio:
unaligned_dio = 0;
}
- if (unaligned_dio)
+ if (unaligned_dio) {
+ ocfs2_iocb_clear_unaligned_aio(iocb);
atomic_dec(&OCFS2_I(inode)->ip_unaligned_aio);
+ }
out:
if (rw_level != -1)
--
cgit v1.2.3-70-g09d2
From 16865b7c42fbce8a4d2b278460e387e719e289cb Mon Sep 17 00:00:00 2001
From: roel <roel.kluin@gmail.com>
Date: Mon, 12 Dec 2011 23:40:51 +0100
Subject: ocfs2: Misplaced parens in unlikley
Fix misplaced parentheses
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
---
fs/ocfs2/dlmglue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 81a4cd22f80..274529cce9c 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -456,7 +456,7 @@ static void ocfs2_update_lock_stats(struct ocfs2_lock_res *res, int level,
stats->ls_gets++;
stats->ls_total += ktime_to_ns(kt);
/* overflow */
- if (unlikely(stats->ls_gets) == 0) {
+ if (unlikely(stats->ls_gets == 0)) {
stats->ls_gets++;
stats->ls_total = ktime_to_ns(kt);
}
--
cgit v1.2.3-70-g09d2
From a75e9ccabd925d16954739bd977c54695c9310d0 Mon Sep 17 00:00:00 2001
From: Srinivas Eeda <srinivas.eeda@oracle.com>
Date: Mon, 30 Jan 2012 21:51:22 -0800
Subject: ocfs2: use spinlock irqsave for downconvert lock.patch
When ocfs2dc thread holds dc_task_lock spinlock and receives soft IRQ it
deadlock itself trying to get same spinlock in ocfs2_wake_downconvert_thread.
Below is the stack snippet.
The patch disables interrupts when acquiring dc_task_lock spinlock.
ocfs2_wake_downconvert_thread
ocfs2_rw_unlock
ocfs2_dio_end_io
dio_complete
.....
bio_endio
req_bio_endio
....
scsi_io_completion
blk_done_softirq
__do_softirq
do_softirq
irq_exit
do_IRQ
ocfs2_downconvert_thread
[kthread]
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
---
fs/ocfs2/dlmglue.c | 31 +++++++++++++++++++------------
1 file changed, 19 insertions(+), 12 deletions(-)
(limited to 'fs')
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 274529cce9c..4f7795fb5fc 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3932,6 +3932,8 @@ unqueue:
static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres)
{
+ unsigned long flags;
+
assert_spin_locked(&lockres->l_lock);
if (lockres->l_flags & OCFS2_LOCK_FREEING) {
@@ -3945,21 +3947,22 @@ static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb,
lockres_or_flags(lockres, OCFS2_LOCK_QUEUED);
- spin_lock(&osb->dc_task_lock);
+ spin_lock_irqsave(&osb->dc_task_lock, flags);
if (list_empty(&lockres->l_blocked_list)) {
list_add_tail(&lockres->l_blocked_list,
&osb->blocked_lock_list);
osb->blocked_lock_count++;
}
- spin_unlock(&osb->dc_task_lock);
+ spin_unlock_irqrestore(&osb->dc_task_lock, flags);
}
static void ocfs2_downconvert_thread_do_work(struct ocfs2_super *osb)
{
unsigned long processed;
+ unsigned long flags;
struct ocfs2_lock_res *lockres;
- spin_lock(&osb->dc_task_lock);
+ spin_lock_irqsave(&osb->dc_task_lock, flags);
/* grab this early so we know to try again if a state change and
* wake happens part-way through our work */
osb->dc_work_sequence = osb->dc_wake_sequence;
@@ -3972,38 +3975,40 @@ static void ocfs2_downconvert_thread_do_work(struct ocfs2_super *osb)
struct ocfs2_lock_res, l_blocked_list);
list_del_init(&lockres->l_blocked_list);
osb->blocked_lock_count--;
- spin_unlock(&osb->dc_task_lock);
+ spin_unlock_irqrestore(&osb->dc_task_lock, flags);
BUG_ON(!processed);
processed--;
ocfs2_process_blocked_lock(osb, lockres);
- spin_lock(&osb->dc_task_lock);
+ spin_lock_irqsave(&osb->dc_task_lock, flags);
}
- spin_unlock(&osb->dc_task_lock);
+ spin_unlock_irqrestore(&osb->dc_task_lock, flags);
}
static int ocfs2_downconvert_thread_lists_empty(struct ocfs2_super *osb)
{
int empty = 0;
+ unsigned long flags;
- spin_lock(&osb->dc_task_lock);
+ spin_lock_irqsave(&osb->dc_task_lock, flags);
if (list_empty(&osb->blocked_lock_list))
empty = 1;
- spin_unlock(&osb->dc_task_lock);
+ spin_unlock_irqrestore(&osb->dc_task_lock, flags);
return empty;
}
static int ocfs2_downconvert_thread_should_wake(struct ocfs2_super *osb)
{
int should_wake = 0;
+ unsigned long flags;
- spin_lock(&osb->dc_task_lock);
+ spin_lock_irqsave(&osb->dc_task_lock, flags);
if (osb->dc_work_sequence != osb->dc_wake_sequence)
should_wake = 1;
- spin_unlock(&osb->dc_task_lock);
+ spin_unlock_irqrestore(&osb->dc_task_lock, flags);
return should_wake;
}
@@ -4033,10 +4038,12 @@ static int ocfs2_downconvert_thread(void *arg)
void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb)
{
- spin_lock(&osb->dc_task_lock);
+ unsigned long flags;
+
+ spin_lock_irqsave(&osb->dc_task_lock, flags);
/* make sure the voting thread gets a swipe at whatever changes
* the caller may have made to the voting state */
osb->dc_wake_sequence++;
- spin_unlock(&osb->dc_task_lock);
+ spin_unlock_irqrestore(&osb->dc_task_lock, flags);
wake_up(&osb->dc_event);
}
--
cgit v1.2.3-70-g09d2
From 65622e647bfff3ed89f95576ec120693ed4085a6 Mon Sep 17 00:00:00 2001
From: Jeff Liu <jeff.liu@oracle.com>
Date: Thu, 9 Feb 2012 14:42:22 +0800
Subject: ocfs2: for SEEK_DATA/SEEK_HOLE, return internal error unchanged if
ocfs2_get_clusters_nocache() or ocfs2_inode_lock() call failed.
Hello,
Since ENXIO only means "offset beyond EOF" for SEEK_DATA/SEEK_HOLE,
Hence we should return the internal error unchanged if ocfs2_inode_lock() or
ocfs2_get_clusters_nocache() call failed rather than ENXIO.
Otherwise, it will confuse the user applications when they trying to understand the root cause.
Thanks Dave for pointing this out.
Thanks,
-Jeff
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
---
fs/ocfs2/extent_map.c | 2 --
1 file changed, 2 deletions(-)
(limited to 'fs')
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 2f5b92ef0e5..70b5863a2d6 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -923,8 +923,6 @@ out_unlock:
ocfs2_inode_unlock(inode, 0);
out:
- if (ret && ret != -ENXIO)
- ret = -ENXIO;
return ret;
}
--
cgit v1.2.3-70-g09d2
From a4564ead763a9264edbec6d4e72aa273f05eb39c Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Fri, 10 Feb 2012 10:50:07 +0100
Subject: ocfs2: Fix bogus error message from ocfs2_global_read_info
'status' variable in ocfs2_global_read_info() is always != 0 when leaving the
function because it happens to contain number of read bytes. Thus we always log
error message although everything is OK. Since all error cases properly call
mlog_errno() before jumping to out_err, there's no reason to call mlog_errno()
on exit at all. This is a fallout of c1e8d35e (conversion of mlog_exit()
calls).
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
---
fs/ocfs2/quota_global.c | 2 --
1 file changed, 2 deletions(-)
(limited to 'fs')
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index 92fcd575775..0a86e302655 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -399,8 +399,6 @@ int ocfs2_global_read_info(struct super_block *sb, int type)
msecs_to_jiffies(oinfo->dqi_syncms));
out_err:
- if (status)
- mlog_errno(status);
return status;
out_unlock:
ocfs2_unlock_global_qf(oinfo, 0);
--
cgit v1.2.3-70-g09d2
From 8dc6780587c99286c0d3de747a2946a76989414a Mon Sep 17 00:00:00 2001
From: Tyler Hicks <tyhicks@canonical.com>
Date: Mon, 11 Jun 2012 09:24:11 -0700
Subject: eCryptfs: Gracefully refuse miscdev file ops on inherited/passed
files
File operations on /dev/ecryptfs would BUG() when the operations were
performed by processes other than the process that originally opened the
file. This could happen with open files inherited after fork() or file
descriptors passed through IPC mechanisms. Rather than calling BUG(), an
error code can be safely returned in most situations.
In ecryptfs_miscdev_release(), eCryptfs still needs to handle the
release even if the last file reference is being held by a process that
didn't originally open the file. ecryptfs_find_daemon_by_euid() will not
be successful, so a pointer to the daemon is stored in the file's
private_data. The private_data pointer is initialized when the miscdev
file is opened and only used when the file is released.
https://launchpad.net/bugs/994247
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Sasha Levin <levinsasha928@gmail.com>
Tested-by: Sasha Levin <levinsasha928@gmail.com>
---
fs/ecryptfs/miscdev.c | 23 ++++++++++++++++-------
1 file changed, 16 insertions(+), 7 deletions(-)
(limited to 'fs')
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index 3c632ec412e..c0038f6566d 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -49,7 +49,10 @@ ecryptfs_miscdev_poll(struct file *file, poll_table *pt)
mutex_lock(&ecryptfs_daemon_hash_mux);
/* TODO: Just use file->private_data? */
rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
- BUG_ON(rc || !daemon);
+ if (rc || !daemon) {
+ mutex_unlock(&ecryptfs_daemon_hash_mux);
+ return -EINVAL;
+ }
mutex_lock(&daemon->mux);
mutex_unlock(&ecryptfs_daemon_hash_mux);
if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
@@ -122,6 +125,7 @@ ecryptfs_miscdev_open(struct inode *inode, struct file *file)
goto out_unlock_daemon;
}
daemon->flags |= ECRYPTFS_DAEMON_MISCDEV_OPEN;
+ file->private_data = daemon;
atomic_inc(&ecryptfs_num_miscdev_opens);
out_unlock_daemon:
mutex_unlock(&daemon->mux);
@@ -152,9 +156,9 @@ ecryptfs_miscdev_release(struct inode *inode, struct file *file)
mutex_lock(&ecryptfs_daemon_hash_mux);
rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
- BUG_ON(rc || !daemon);
+ if (rc || !daemon)
+ daemon = file->private_data;
mutex_lock(&daemon->mux);
- BUG_ON(daemon->pid != task_pid(current));
BUG_ON(!(daemon->flags & ECRYPTFS_DAEMON_MISCDEV_OPEN));
daemon->flags &= ~ECRYPTFS_DAEMON_MISCDEV_OPEN;
atomic_dec(&ecryptfs_num_miscdev_opens);
@@ -270,8 +274,16 @@ ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count,
mutex_lock(&ecryptfs_daemon_hash_mux);
/* TODO: Just use file->private_data? */
rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
- BUG_ON(rc || !daemon);
+ if (rc || !daemon) {
+ mutex_unlock(&ecryptfs_daemon_hash_mux);
+ return -EINVAL;
+ }
mutex_lock(&daemon->mux);
+ if (task_pid(current) != daemon->pid) {
+ mutex_unlock(&daemon->mux);
+ mutex_unlock(&ecryptfs_daemon_hash_mux);
+ return -EPERM;
+ }
if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
rc = 0;
mutex_unlock(&ecryptfs_daemon_hash_mux);
@@ -308,9 +320,6 @@ check_list:
* message from the queue; try again */
goto check_list;
}
- BUG_ON(euid != daemon->euid);
- BUG_ON(current_user_ns() != daemon->user_ns);
- BUG_ON(task_pid(current) != daemon->pid);
msg_ctx = list_first_entry(&daemon->msg_ctx_out_queue,
struct ecryptfs_msg_ctx, daemon_out_list);
BUG_ON(!msg_ctx);
--
cgit v1.2.3-70-g09d2
From 332a2e1244bd08b9e3ecd378028513396a004a24 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sat, 7 Jul 2012 10:17:00 -0700
Subject: vfs: make O_PATH file descriptors usable for 'fchdir()'
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
We already use them for openat() and friends, but fchdir() also wants to
be able to use O_PATH file descriptors. This should make it comparable
to the O_SEARCH of Solaris. In particular, O_PATH allows you to access
(not-quite-open) a directory you don't have read persmission to, only
execute permission.
Noticed during development of multithread support for ksh93.
Reported-by: ольга крыжановская <olga.kryzhanovska@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org # O_PATH introduced in 3.0+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/open.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
(limited to 'fs')
diff --git a/fs/open.c b/fs/open.c
index d6c79a0dffc..1540632d838 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -397,10 +397,10 @@ SYSCALL_DEFINE1(fchdir, unsigned int, fd)
{
struct file *file;
struct inode *inode;
- int error;
+ int error, fput_needed;
error = -EBADF;
- file = fget(fd);
+ file = fget_raw_light(fd, &fput_needed);
if (!file)
goto out;
@@ -414,7 +414,7 @@ SYSCALL_DEFINE1(fchdir, unsigned int, fd)
if (!error)
set_fs_pwd(current->fs, &file->f_path);
out_putf:
- fput(file);
+ fput_light(file, fput_needed);
out:
return error;
}
--
cgit v1.2.3-70-g09d2
From 4035c2487f179327fae87af3477659402b797584 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Sun, 8 Jul 2012 10:24:10 -0400
Subject: NFS: Fix list manipulation snafus in fs/nfs/direct.c
Fix 2 bugs in nfs_direct_write_reschedule:
- The request needs to be removed from the 'reqs' list before it can
be added to 'failed'.
- Fix an infinite loop if the 'failed' list is non-empty.
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
fs/nfs/direct.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 9a4cbfc85d8..48253372ab1 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -484,6 +484,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
list_for_each_entry_safe(req, tmp, &reqs, wb_list) {
if (!nfs_pageio_add_request(&desc, req)) {
+ nfs_list_remove_request(req);
nfs_list_add_request(req, &failed);
spin_lock(cinfo.lock);
dreq->flags = 0;
@@ -494,8 +495,11 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
}
nfs_pageio_complete(&desc);
- while (!list_empty(&failed))
+ while (!list_empty(&failed)) {
+ req = nfs_list_entry(failed.next);
+ nfs_list_remove_request(req);
nfs_unlock_and_release_request(req);
+ }
if (put_dreq(dreq))
nfs_direct_write_complete(dreq, dreq->inode);
--
cgit v1.2.3-70-g09d2
From f1daf666dd7d097653bd38320248c68084b1febf Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 10 Jul 2012 12:04:15 -0400
Subject: NFSv4: Fix an NFSv4 mount regression
The helper nfs_fs_mount() will always call nfs4_try_mount with the
mount_info->fill_super argument pointing to nfs_fill_super, which is
NFSv2/v3 only.
Fix is to have nfs4_try_mount replace it with nfs4_fill_super.
The regression was introduced by commit c40f8d1d (NFS: Create a common
fs_mount() function)
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
fs/nfs/super.c | 2 ++
1 file changed, 2 insertions(+)
(limited to 'fs')
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 906f09c7d84..06228192f64 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2860,6 +2860,8 @@ static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
dfprintk(MOUNT, "--> nfs4_try_mount()\n");
+ mount_info->fill_super = nfs4_fill_super;
+
export_path = data->nfs_server.export_path;
data->nfs_server.export_path = "/";
root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, mount_info,
--
cgit v1.2.3-70-g09d2
From a4e08d001f2e50bb8b3c4eebadcf08e5535f02ee Mon Sep 17 00:00:00 2001
From: Luis Henriques <luis.henriques@canonical.com>
Date: Wed, 11 Jul 2012 14:02:10 -0700
Subject: ocfs2: fix NULL pointer dereference in __ocfs2_change_file_space()
As ocfs2_fallocate() will invoke __ocfs2_change_file_space() with a NULL
as the first parameter (file), it may trigger a NULL pointer dereferrence
due to a missing check.
Addresses http://bugs.launchpad.net/bugs/1006012
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Reported-by: Bret Towe <magnade@gmail.com>
Tested-by: Bret Towe <magnade@gmail.com>
Cc: Sunil Mushran <sunil.mushran@oracle.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/ocfs2/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 98513c8ed58..7602783d7f4 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1950,7 +1950,7 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
if (ret < 0)
mlog_errno(ret);
- if (file->f_flags & O_SYNC)
+ if (file && (file->f_flags & O_SYNC))
handle->h_sync = 1;
ocfs2_commit_trans(osb, handle);
--
cgit v1.2.3-70-g09d2
From fea9f718b3d68147f162ed2d870183ce5e0ad8d8 Mon Sep 17 00:00:00 2001
From: Bob Liu <lliubbo@gmail.com>
Date: Wed, 11 Jul 2012 14:02:35 -0700
Subject: fs: ramfs: file-nommu: add SetPageUptodate()
There is a bug in the below scenario for !CONFIG_MMU:
1. create a new file
2. mmap the file and write to it
3. read the file can't get the correct value
Because
sys_read() -> generic_file_aio_read() -> simple_readpage() -> clear_page()
which causes the page to be zeroed.
Add SetPageUptodate() to ramfs_nommu_expand_for_mapping() so that
generic_file_aio_read() do not call simple_readpage().
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/ramfs/file-nommu.c | 1 +
1 file changed, 1 insertion(+)
(limited to 'fs')
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index fbb0b478a34..d5378d02858 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -110,6 +110,7 @@ int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
/* prevent the page from being discarded on memory pressure */
SetPageDirty(page);
+ SetPageUptodate(page);
unlock_page(page);
put_page(page);
--
cgit v1.2.3-70-g09d2
From 5d8ecbbc284f7e7568969574a6601b05f1ed1d90 Mon Sep 17 00:00:00 2001
From: "Steven J. Magnani" <steve@digidescorp.com>
Date: Wed, 11 Jul 2012 14:02:42 -0700
Subject: fat: fix non-atomic NFS i_pos read
fat_encode_fh() can fetch an invalid i_pos value on systems where 64-bit
accesses are not atomic. Make it use the same accessor as the rest of the
FAT code.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/fat/inode.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
(limited to 'fs')
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index a3d81ebf6d8..0038b32cb36 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -738,22 +738,21 @@ static int
fat_encode_fh(struct inode *inode, __u32 *fh, int *lenp, struct inode *parent)
{
int len = *lenp;
- u32 ipos_h, ipos_m, ipos_l;
+ struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+ loff_t i_pos;
if (len < 5) {
*lenp = 5;
return 255; /* no room */
}
- ipos_h = MSDOS_I(inode)->i_pos >> 8;
- ipos_m = (MSDOS_I(inode)->i_pos & 0xf0) << 24;
- ipos_l = (MSDOS_I(inode)->i_pos & 0x0f) << 28;
+ i_pos = fat_i_pos_read(sbi, inode);
*lenp = 5;
fh[0] = inode->i_ino;
fh[1] = inode->i_generation;
- fh[2] = ipos_h;
- fh[3] = ipos_m | MSDOS_I(inode)->i_logstart;
- fh[4] = ipos_l;
+ fh[2] = i_pos >> 8;
+ fh[3] = ((i_pos & 0xf0) << 24) | MSDOS_I(inode)->i_logstart;
+ fh[4] = (i_pos & 0x0f) << 28;
if (parent)
fh[4] |= MSDOS_I(parent)->i_logstart;
return 3;
--
cgit v1.2.3-70-g09d2
From 91f68c89d8f35fe98ea04159b9a3b42d0149478f Mon Sep 17 00:00:00 2001
From: Jeff Moyer <jmoyer@redhat.com>
Date: Thu, 12 Jul 2012 09:43:14 -0400
Subject: block: fix infinite loop in __getblk_slow
Commit 080399aaaf35 ("block: don't mark buffers beyond end of disk as
mapped") exposed a bug in __getblk_slow that causes mount to hang as it
loops infinitely waiting for a buffer that lies beyond the end of the
disk to become uptodate.
The problem was initially reported by Torsten Hilbrich here:
https://lkml.org/lkml/2012/6/18/54
and also reported independently here:
http://www.sysresccd.org/forums/viewtopic.php?f=13&t=4511
and then Richard W.M. Jones and Marcos Mello noted a few separate
bugzillas also associated with the same issue. This patch has been
confirmed to fix:
https://bugzilla.redhat.com/show_bug.cgi?id=835019
The main problem is here, in __getblk_slow:
for (;;) {
struct buffer_head * bh;
int ret;
bh = __find_get_block(bdev, block, size);
if (bh)
return bh;
ret = grow_buffers(bdev, block, size);
if (ret < 0)
return NULL;
if (ret == 0)
free_more_memory();
}
__find_get_block does not find the block, since it will not be marked as
mapped, and so grow_buffers is called to fill in the buffers for the
associated page. I believe the for (;;) loop is there primarily to
retry in the case of memory pressure keeping grow_buffers from
succeeding. However, we also continue to loop for other cases, like the
block lying beond the end of the disk. So, the fix I came up with is to
only loop when grow_buffers fails due to memory allocation issues
(return value of 0).
The attached patch was tested by myself, Torsten, and Rich, and was
found to resolve the problem in call cases.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Reported-and-Tested-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Josh Boyer <jwboyer@redhat.com>
Cc: Stable <stable@vger.kernel.org> # 3.0+
[ Jens is on vacation, taking this directly - Linus ]
--
Stable Notes: this patch requires backport to 3.0, 3.2 and 3.3.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/buffer.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)
(limited to 'fs')
diff --git a/fs/buffer.c b/fs/buffer.c
index 838a9cf246b..c7062c896d7 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1036,6 +1036,9 @@ grow_buffers(struct block_device *bdev, sector_t block, int size)
static struct buffer_head *
__getblk_slow(struct block_device *bdev, sector_t block, int size)
{
+ int ret;
+ struct buffer_head *bh;
+
/* Size must be multiple of hard sectorsize */
if (unlikely(size & (bdev_logical_block_size(bdev)-1) ||
(size < 512 || size > PAGE_SIZE))) {
@@ -1048,20 +1051,21 @@ __getblk_slow(struct block_device *bdev, sector_t block, int size)
return NULL;
}
- for (;;) {
- struct buffer_head * bh;
- int ret;
+retry:
+ bh = __find_get_block(bdev, block, size);
+ if (bh)
+ return bh;
+ ret = grow_buffers(bdev, block, size);
+ if (ret == 0) {
+ free_more_memory();
+ goto retry;
+ } else if (ret > 0) {
bh = __find_get_block(bdev, block, size);
if (bh)
return bh;
-
- ret = grow_buffers(bdev, block, size);
- if (ret < 0)
- return NULL;
- if (ret == 0)
- free_more_memory();
}
+ return NULL;
}
/*
--
cgit v1.2.3-70-g09d2
From 8d657eb3b43861064d36241e88d9d61c709f33f0 Mon Sep 17 00:00:00 2001
From: Dave Jones <davej@redhat.com>
Date: Fri, 13 Jul 2012 13:35:36 -0400
Subject: Remove easily user-triggerable BUG from generic_setlease
This can be trivially triggered from userspace by passing in something unexpected.
kernel BUG at fs/locks.c:1468!
invalid opcode: 0000 [#1] SMP
RIP: 0010:generic_setlease+0xc2/0x100
Call Trace:
__vfs_setlease+0x35/0x40
fcntl_setlease+0x76/0x150
sys_fcntl+0x1c6/0x810
system_call_fastpath+0x1a/0x1f
Signed-off-by: Dave Jones <davej@redhat.com>
Cc: stable@kernel.org # 3.2+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/locks.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/locks.c b/fs/locks.c
index 814c51d0de4..fce6238d52c 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1465,7 +1465,7 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp)
case F_WRLCK:
return generic_add_lease(filp, arg, flp);
default:
- BUG();
+ return -EINVAL;
}
}
EXPORT_SYMBOL(generic_setlease);
--
cgit v1.2.3-70-g09d2
From bc86256d2e80e6731a2055175d9a32cf96eb71f8 Mon Sep 17 00:00:00 2001
From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 18:56:51 +0300
Subject: affs: stop setting bm_flags
AFFS stores values '1' and '2' in 'bm_flags', and I fail to see any logic when
it prefers one or another. AFFS writes '1' only from '->put_super()', while
'->sync_fs()' and '->write_super()' store value '2'. So on the first glance,
it looks like we want to have '1' if we unmount. However, this does not really
happen in these cases:
1. superblock is written via 'write_super()' then we unmount;
2. we re-mount R/O, then unmount.
which are quite typical.
I could not find good documentation describing this field, except of one random
piece of documentation in the internet which says that -1 means that the root
block is valid, which is not consistent with what we have in the Linux AFFS
driver.
Jan Kara commented on this: "I have some vague recollection that on Amiga
boolean was usually encoded as: 0 == false, ~0 == -1 == true. But it has been
ages..."
Thus, my conclusion is that value of '1' is as good as value of '2' and we can
just always use '2'. An Jan Kara suggested to go further: "generally bm_flags
handling looks strange. If they are 0, we mount fs read only and thus cannot
change them. If they are != 0, we write 2 there. So IMHO if you just removed
bm_flags setting, nothing will really happen."
So this patch removes the bm_flags setting completely. This makes the "clean"
argument of the 'affs_commit_super()' function unneeded, so it is also removed.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/super.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 0782653a05a..1d42e468abd 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -25,13 +25,12 @@ static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
static int affs_remount (struct super_block *sb, int *flags, char *data);
static void
-affs_commit_super(struct super_block *sb, int wait, int clean)
+affs_commit_super(struct super_block *sb, int wait)
{
struct affs_sb_info *sbi = AFFS_SB(sb);
struct buffer_head *bh = sbi->s_root_bh;
struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
- tail->bm_flag = cpu_to_be32(clean);
secs_to_datestamp(get_seconds(), &tail->disk_change);
affs_fix_checksum(sb, bh);
mark_buffer_dirty(bh);
@@ -46,7 +45,7 @@ affs_put_super(struct super_block *sb)
pr_debug("AFFS: put_super()\n");
if (!(sb->s_flags & MS_RDONLY) && sb->s_dirt)
- affs_commit_super(sb, 1, 1);
+ affs_commit_super(sb, 1);
kfree(sbi->s_prefix);
affs_free_bitmap(sb);
@@ -60,7 +59,7 @@ affs_write_super(struct super_block *sb)
{
lock_super(sb);
if (!(sb->s_flags & MS_RDONLY))
- affs_commit_super(sb, 1, 2);
+ affs_commit_super(sb, 1);
sb->s_dirt = 0;
unlock_super(sb);
@@ -71,7 +70,7 @@ static int
affs_sync_fs(struct super_block *sb, int wait)
{
lock_super(sb);
- affs_commit_super(sb, wait, 2);
+ affs_commit_super(sb, wait);
sb->s_dirt = 0;
unlock_super(sb);
return 0;
--
cgit v1.2.3-70-g09d2
From c9753b1d20e13c94d15a1c8b252a696744bd22a2 Mon Sep 17 00:00:00 2001
From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 18:56:52 +0300
Subject: affs: remove useless superblock writeout on unmount
We do not need to write out the superblock from '->put_super()' because VFS has
already called '->sync_fs()' by this time and the superblock has already been
written out. Thus, remove the 'affs_commit_super()' infocation from
'affs_put_super()'.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/super.c | 3 ---
1 file changed, 3 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 1d42e468abd..12b4f58081b 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -44,9 +44,6 @@ affs_put_super(struct super_block *sb)
struct affs_sb_info *sbi = AFFS_SB(sb);
pr_debug("AFFS: put_super()\n");
- if (!(sb->s_flags & MS_RDONLY) && sb->s_dirt)
- affs_commit_super(sb, 1);
-
kfree(sbi->s_prefix);
affs_free_bitmap(sb);
affs_brelse(sbi->s_root_bh);
--
cgit v1.2.3-70-g09d2
From 0164b1a32e6849121ea73ef3124a2994951a4713 Mon Sep 17 00:00:00 2001
From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 18:56:53 +0300
Subject: affs: remove useless superblock writeout on remount
We do not need to write out the superblock from '->remount_fs()' because
VFS has already called '->sync_fs()' by this time and the superblock has
already been written out. Thus, remove the 'affs_write_super()'
infocation from 'affs_remount()'.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/super.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 12b4f58081b..c837e43687a 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -545,10 +545,9 @@ affs_remount(struct super_block *sb, int *flags, char *data)
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
- if (*flags & MS_RDONLY) {
- affs_write_super(sb);
+ if (*flags & MS_RDONLY)
affs_free_bitmap(sb);
- } else
+ else
res = affs_init_bitmap(sb, flags);
return res;
--
cgit v1.2.3-70-g09d2
From e0471c8d8abbc2b07fc82f7b02896d1637909319 Mon Sep 17 00:00:00 2001
From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 18:56:54 +0300
Subject: affs: re-structure superblock locking a bit
AFFS wants to serialize the superblock (the root block in AFFS terms) updates
and uses 'lock_super()/unlock_super()' for these purposes. This patch pushes the
locking down to the 'affs_commit_super()' from the callers.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/super.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/super.c b/fs/affs/super.c
index c837e43687a..4ceec563643 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -31,11 +31,13 @@ affs_commit_super(struct super_block *sb, int wait)
struct buffer_head *bh = sbi->s_root_bh;
struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
+ lock_super(sb);
secs_to_datestamp(get_seconds(), &tail->disk_change);
affs_fix_checksum(sb, bh);
mark_buffer_dirty(bh);
if (wait)
sync_dirty_buffer(bh);
+ unlock_super(sb);
}
static void
@@ -54,22 +56,17 @@ affs_put_super(struct super_block *sb)
static void
affs_write_super(struct super_block *sb)
{
- lock_super(sb);
if (!(sb->s_flags & MS_RDONLY))
affs_commit_super(sb, 1);
sb->s_dirt = 0;
- unlock_super(sb);
-
pr_debug("AFFS: write_super() at %lu, clean=2\n", get_seconds());
}
static int
affs_sync_fs(struct super_block *sb, int wait)
{
- lock_super(sb);
affs_commit_super(sb, wait);
sb->s_dirt = 0;
- unlock_super(sb);
return 0;
}
--
cgit v1.2.3-70-g09d2
From a837107439ea50116e59943556d6902c09e52772 Mon Sep 17 00:00:00 2001
From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 18:56:55 +0300
Subject: affs: stop using lock_super
The VFS's 'lock_super()' and 'unlock_super()' calls are deprecated and unwanted
and just wait for a brave knight who'd kill them. This patch makes AFFS stop
using them and use the buffer-head's own lock instead.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/super.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 4ceec563643..da7498da80a 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -31,13 +31,14 @@ affs_commit_super(struct super_block *sb, int wait)
struct buffer_head *bh = sbi->s_root_bh;
struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
- lock_super(sb);
+ lock_buffer(bh);
secs_to_datestamp(get_seconds(), &tail->disk_change);
affs_fix_checksum(sb, bh);
+ unlock_buffer(bh);
+
mark_buffer_dirty(bh);
if (wait)
sync_dirty_buffer(bh);
- unlock_super(sb);
}
static void
--
cgit v1.2.3-70-g09d2
From a215fef7edfdcd8948037ceb3060b9ae7ebcef8b Mon Sep 17 00:00:00 2001
From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 18:56:56 +0300
Subject: affs: introduce VFS superblock object back-reference
Add an 'sb' VFS superblock back-reference to the 'struct affs_sb_info' data
structure - we will need to find the VFS superblock from a 'struct
affs_sb_info' object in the next patch, so this change is jut a preparation.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/affs.h | 1 +
fs/affs/super.c | 1 +
2 files changed, 2 insertions(+)
(limited to 'fs')
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 1fceb320d2f..5a726e99224 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -100,6 +100,7 @@ struct affs_sb_info {
char *s_prefix; /* Prefix for volumes and assigns. */
char s_volume[32]; /* Volume prefix for absolute symlinks. */
spinlock_t symlink_lock; /* protects the previous two */
+ struct super_block *sb; /* the VFS superblock object */
};
#define SF_INTL 0x0001 /* International filesystem. */
diff --git a/fs/affs/super.c b/fs/affs/super.c
index da7498da80a..0496cbbeda1 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -299,6 +299,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
return -ENOMEM;
sb->s_fs_info = sbi;
+ sbi->sb = sb;
mutex_init(&sbi->s_bmlock);
spin_lock_init(&sbi->symlink_lock);
--
cgit v1.2.3-70-g09d2
From 3dd847820d138c9d60764b0e920380373285ff10 Mon Sep 17 00:00:00 2001
From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 18:56:57 +0300
Subject: affs: get rid of affs_sync_super
This patch makes affs stop using the VFS '->write_super()' method along with
the 's_dirt' superblock flag, because they are on their way out.
The whole "superblock write-out" VFS infrastructure is served by the
'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and
writes out all dirty superblocks using the '->write_super()' call-back. But the
problem with this thread is that it wastes power by waking up the system every
5 seconds, even if there are no diry superblocks, or there are no client
file-systems which would need this (e.g., btrfs does not use
'->write_super()'). So we want to kill it completely and thus, we need to make
file-systems to stop using the '->write_super()' VFS service, and then remove
it together with the kernel thread.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/affs.h | 6 ++++++
fs/affs/bitmap.c | 4 ++--
fs/affs/super.c | 48 +++++++++++++++++++++++++++++++++++++-----------
3 files changed, 45 insertions(+), 13 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 5a726e99224..3a130e27eb1 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -3,6 +3,7 @@
#include <linux/buffer_head.h>
#include <linux/amigaffs.h>
#include <linux/mutex.h>
+#include <linux/workqueue.h>
/* AmigaOS allows file names with up to 30 characters length.
* Names longer than that will be silently truncated. If you
@@ -101,6 +102,9 @@ struct affs_sb_info {
char s_volume[32]; /* Volume prefix for absolute symlinks. */
spinlock_t symlink_lock; /* protects the previous two */
struct super_block *sb; /* the VFS superblock object */
+ int work_queued; /* non-zero delayed work is queued */
+ struct delayed_work sb_work; /* superblock flush delayed work */
+ spinlock_t work_lock; /* protects sb_work and work_queued */
};
#define SF_INTL 0x0001 /* International filesystem. */
@@ -121,6 +125,8 @@ static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
return sb->s_fs_info;
}
+void affs_mark_sb_dirty(struct super_block *sb);
+
/* amigaffs.c */
extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh);
diff --git a/fs/affs/bitmap.c b/fs/affs/bitmap.c
index 3e262711ae0..6e0be43ef6e 100644
--- a/fs/affs/bitmap.c
+++ b/fs/affs/bitmap.c
@@ -103,7 +103,7 @@ affs_free_block(struct super_block *sb, u32 block)
*(__be32 *)bh->b_data = cpu_to_be32(tmp - mask);
mark_buffer_dirty(bh);
- sb->s_dirt = 1;
+ affs_mark_sb_dirty(sb);
bm->bm_free++;
mutex_unlock(&sbi->s_bmlock);
@@ -248,7 +248,7 @@ find_bit:
*(__be32 *)bh->b_data = cpu_to_be32(tmp + mask);
mark_buffer_dirty(bh);
- sb->s_dirt = 1;
+ affs_mark_sb_dirty(sb);
mutex_unlock(&sbi->s_bmlock);
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 0496cbbeda1..c70f1e5fc02 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -17,6 +17,7 @@
#include <linux/magic.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/writeback.h>
#include "affs.h"
extern struct timezone sys_tz;
@@ -47,6 +48,7 @@ affs_put_super(struct super_block *sb)
struct affs_sb_info *sbi = AFFS_SB(sb);
pr_debug("AFFS: put_super()\n");
+ cancel_delayed_work_sync(&sbi->sb_work);
kfree(sbi->s_prefix);
affs_free_bitmap(sb);
affs_brelse(sbi->s_root_bh);
@@ -54,23 +56,45 @@ affs_put_super(struct super_block *sb)
sb->s_fs_info = NULL;
}
-static void
-affs_write_super(struct super_block *sb)
-{
- if (!(sb->s_flags & MS_RDONLY))
- affs_commit_super(sb, 1);
- sb->s_dirt = 0;
- pr_debug("AFFS: write_super() at %lu, clean=2\n", get_seconds());
-}
-
static int
affs_sync_fs(struct super_block *sb, int wait)
{
affs_commit_super(sb, wait);
- sb->s_dirt = 0;
return 0;
}
+static void flush_superblock(struct work_struct *work)
+{
+ struct affs_sb_info *sbi;
+ struct super_block *sb;
+
+ sbi = container_of(work, struct affs_sb_info, sb_work.work);
+ sb = sbi->sb;
+
+ spin_lock(&sbi->work_lock);
+ sbi->work_queued = 0;
+ spin_unlock(&sbi->work_lock);
+
+ affs_commit_super(sb, 1);
+}
+
+void affs_mark_sb_dirty(struct super_block *sb)
+{
+ struct affs_sb_info *sbi = AFFS_SB(sb);
+ unsigned long delay;
+
+ if (sb->s_flags & MS_RDONLY)
+ return;
+
+ spin_lock(&sbi->work_lock);
+ if (!sbi->work_queued) {
+ delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+ queue_delayed_work(system_long_wq, &sbi->sb_work, delay);
+ sbi->work_queued = 1;
+ }
+ spin_unlock(&sbi->work_lock);
+}
+
static struct kmem_cache * affs_inode_cachep;
static struct inode *affs_alloc_inode(struct super_block *sb)
@@ -132,7 +156,6 @@ static const struct super_operations affs_sops = {
.write_inode = affs_write_inode,
.evict_inode = affs_evict_inode,
.put_super = affs_put_super,
- .write_super = affs_write_super,
.sync_fs = affs_sync_fs,
.statfs = affs_statfs,
.remount_fs = affs_remount,
@@ -302,6 +325,8 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sbi->sb = sb;
mutex_init(&sbi->s_bmlock);
spin_lock_init(&sbi->symlink_lock);
+ spin_lock_init(&sbi->work_lock);
+ INIT_DELAYED_WORK(&sbi->sb_work, flush_superblock);
if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
&blocksize,&sbi->s_prefix,
@@ -526,6 +551,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
return -EINVAL;
}
+ flush_delayed_work_sync(&sbi->sb_work);
replace_mount_options(sb, new_opts);
sbi->s_flags = mount_flags;
--
cgit v1.2.3-70-g09d2
From d187663ef24cd3d033f0cbf2867e70b36a3a90b8 Mon Sep 17 00:00:00 2001
From: Julia Lawall <Julia.Lawall@lip6.fr>
Date: Thu, 7 Jun 2012 15:45:00 -0700
Subject: fs/direct-io.c: adjust suspicious bit operation
READ is 0, so the result of the bit-and operation is 0. Rewrite with == as
done elsewhere in the same file.
This problem was found using Coccinelle (http://coccinelle.lip6.fr/).
Signed-off-by: Julia Lawall <julia@diku.dk>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/direct-io.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 0c85fae3766..1faf4cb56f3 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1258,7 +1258,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
*/
BUG_ON(retval == -EIOCBQUEUED);
if (dio->is_async && retval == 0 && dio->result &&
- ((rw & READ) || (dio->result == sdio.size)))
+ ((rw == READ) || (dio->result == sdio.size)))
retval = -EIOCBQUEUED;
if (retval != -EIOCBQUEUED)
--
cgit v1.2.3-70-g09d2
From f7a99c5b7c8bd3d3f533c8b38274e33f3da9096e Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 00:59:08 -0400
Subject: get rid of ->mnt_longterm
it's enough to set ->mnt_ns of internal vfsmounts to something
distinct from all struct mnt_namespace out there; then we can
just use the check for ->mnt_ns != NULL in the fast path of
mntput_no_expire()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/dcache.c | 2 +-
fs/fs_struct.c | 32 ++++++++++----------------------
fs/internal.h | 2 --
fs/mount.h | 9 ++++++++-
fs/namespace.c | 53 +++++++----------------------------------------------
5 files changed, 26 insertions(+), 72 deletions(-)
(limited to 'fs')
diff --git a/fs/dcache.c b/fs/dcache.c
index 40469044088..44acb5b29ae 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2622,7 +2622,7 @@ global_root:
if (!slash)
error = prepend(buffer, buflen, "/", 1);
if (!error)
- error = real_mount(vfsmnt)->mnt_ns ? 1 : 2;
+ error = is_mounted(vfsmnt) ? 1 : 2;
goto out;
}
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index e159e682ad4..5df4775fea0 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -6,18 +6,6 @@
#include <linux/fs_struct.h>
#include "internal.h"
-static inline void path_get_longterm(struct path *path)
-{
- path_get(path);
- mnt_make_longterm(path->mnt);
-}
-
-static inline void path_put_longterm(struct path *path)
-{
- mnt_make_shortterm(path->mnt);
- path_put(path);
-}
-
/*
* Replace the fs->{rootmnt,root} with {mnt,dentry}. Put the old values.
* It can block.
@@ -26,7 +14,7 @@ void set_fs_root(struct fs_struct *fs, struct path *path)
{
struct path old_root;
- path_get_longterm(path);
+ path_get(path);
spin_lock(&fs->lock);
write_seqcount_begin(&fs->seq);
old_root = fs->root;
@@ -34,7 +22,7 @@ void set_fs_root(struct fs_struct *fs, struct path *path)
write_seqcount_end(&fs->seq);
spin_unlock(&fs->lock);
if (old_root.dentry)
- path_put_longterm(&old_root);
+ path_put(&old_root);
}
/*
@@ -45,7 +33,7 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path)
{
struct path old_pwd;
- path_get_longterm(path);
+ path_get(path);
spin_lock(&fs->lock);
write_seqcount_begin(&fs->seq);
old_pwd = fs->pwd;
@@ -54,7 +42,7 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path)
spin_unlock(&fs->lock);
if (old_pwd.dentry)
- path_put_longterm(&old_pwd);
+ path_put(&old_pwd);
}
static inline int replace_path(struct path *p, const struct path *old, const struct path *new)
@@ -84,7 +72,7 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root)
write_seqcount_end(&fs->seq);
while (hits--) {
count++;
- path_get_longterm(new_root);
+ path_get(new_root);
}
spin_unlock(&fs->lock);
}
@@ -92,13 +80,13 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root)
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
while (count--)
- path_put_longterm(old_root);
+ path_put(old_root);
}
void free_fs_struct(struct fs_struct *fs)
{
- path_put_longterm(&fs->root);
- path_put_longterm(&fs->pwd);
+ path_put(&fs->root);
+ path_put(&fs->pwd);
kmem_cache_free(fs_cachep, fs);
}
@@ -132,9 +120,9 @@ struct fs_struct *copy_fs_struct(struct fs_struct *old)
spin_lock(&old->lock);
fs->root = old->root;
- path_get_longterm(&fs->root);
+ path_get(&fs->root);
fs->pwd = old->pwd;
- path_get_longterm(&fs->pwd);
+ path_get(&fs->pwd);
spin_unlock(&old->lock);
}
return fs;
diff --git a/fs/internal.h b/fs/internal.h
index 18bc216ea09..d2a23ff61b4 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -50,8 +50,6 @@ extern int copy_mount_string(const void __user *, char **);
extern struct vfsmount *lookup_mnt(struct path *);
extern int finish_automount(struct vfsmount *, struct path *);
-extern void mnt_make_longterm(struct vfsmount *);
-extern void mnt_make_shortterm(struct vfsmount *);
extern int sb_prepare_remount_readonly(struct super_block *);
extern void __init mnt_init(void);
diff --git a/fs/mount.h b/fs/mount.h
index 4ef36d93e5a..05a2a1185ef 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -22,7 +22,6 @@ struct mount {
struct vfsmount mnt;
#ifdef CONFIG_SMP
struct mnt_pcp __percpu *mnt_pcp;
- atomic_t mnt_longterm; /* how many of the refs are longterm */
#else
int mnt_count;
int mnt_writers;
@@ -49,6 +48,8 @@ struct mount {
int mnt_ghosts;
};
+#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
+
static inline struct mount *real_mount(struct vfsmount *mnt)
{
return container_of(mnt, struct mount, mnt);
@@ -59,6 +60,12 @@ static inline int mnt_has_parent(struct mount *mnt)
return mnt != mnt->mnt_parent;
}
+static inline int is_mounted(struct vfsmount *mnt)
+{
+ /* neither detached nor internal? */
+ return !IS_ERR_OR_NULL(real_mount(mnt));
+}
+
extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
static inline void get_mnt_ns(struct mnt_namespace *ns)
diff --git a/fs/namespace.c b/fs/namespace.c
index 1e4a5fe3d7b..a524ea4dbd8 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -621,21 +621,6 @@ static void attach_mnt(struct mount *mnt, struct path *path)
list_add_tail(&mnt->mnt_child, &real_mount(path->mnt)->mnt_mounts);
}
-static inline void __mnt_make_longterm(struct mount *mnt)
-{
-#ifdef CONFIG_SMP
- atomic_inc(&mnt->mnt_longterm);
-#endif
-}
-
-/* needs vfsmount lock for write */
-static inline void __mnt_make_shortterm(struct mount *mnt)
-{
-#ifdef CONFIG_SMP
- atomic_dec(&mnt->mnt_longterm);
-#endif
-}
-
/*
* vfsmount lock must be held for write
*/
@@ -649,10 +634,8 @@ static void commit_tree(struct mount *mnt)
BUG_ON(parent == mnt);
list_add_tail(&head, &mnt->mnt_list);
- list_for_each_entry(m, &head, mnt_list) {
+ list_for_each_entry(m, &head, mnt_list)
m->mnt_ns = n;
- __mnt_make_longterm(m);
- }
list_splice(&head, n->list.prev);
@@ -804,7 +787,8 @@ static void mntput_no_expire(struct mount *mnt)
put_again:
#ifdef CONFIG_SMP
br_read_lock(&vfsmount_lock);
- if (likely(atomic_read(&mnt->mnt_longterm))) {
+ if (likely(mnt->mnt_ns)) {
+ /* shouldn't be the last one */
mnt_add_count(mnt, -1);
br_read_unlock(&vfsmount_lock);
return;
@@ -1074,8 +1058,6 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill)
list_del_init(&p->mnt_expire);
list_del_init(&p->mnt_list);
__touch_mnt_namespace(p->mnt_ns);
- if (p->mnt_ns)
- __mnt_make_shortterm(p);
p->mnt_ns = NULL;
list_del_init(&p->mnt_child);
if (mnt_has_parent(p)) {
@@ -2209,23 +2191,6 @@ static struct mnt_namespace *alloc_mnt_ns(void)
return new_ns;
}
-void mnt_make_longterm(struct vfsmount *mnt)
-{
- __mnt_make_longterm(real_mount(mnt));
-}
-
-void mnt_make_shortterm(struct vfsmount *m)
-{
-#ifdef CONFIG_SMP
- struct mount *mnt = real_mount(m);
- if (atomic_add_unless(&mnt->mnt_longterm, -1, 1))
- return;
- br_write_lock(&vfsmount_lock);
- atomic_dec(&mnt->mnt_longterm);
- br_write_unlock(&vfsmount_lock);
-#endif
-}
-
/*
* Allocate a new namespace structure and populate it with contents
* copied from the namespace of the passed in task structure.
@@ -2265,18 +2230,13 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
q = new;
while (p) {
q->mnt_ns = new_ns;
- __mnt_make_longterm(q);
if (fs) {
if (&p->mnt == fs->root.mnt) {
fs->root.mnt = mntget(&q->mnt);
- __mnt_make_longterm(q);
- mnt_make_shortterm(&p->mnt);
rootmnt = &p->mnt;
}
if (&p->mnt == fs->pwd.mnt) {
fs->pwd.mnt = mntget(&q->mnt);
- __mnt_make_longterm(q);
- mnt_make_shortterm(&p->mnt);
pwdmnt = &p->mnt;
}
}
@@ -2320,7 +2280,6 @@ static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)
if (!IS_ERR(new_ns)) {
struct mount *mnt = real_mount(m);
mnt->mnt_ns = new_ns;
- __mnt_make_longterm(mnt);
new_ns->root = mnt;
list_add(&new_ns->list, &mnt->mnt_list);
} else {
@@ -2615,7 +2574,7 @@ struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
* it is a longterm mount, don't release mnt until
* we unmount before file sys is unregistered
*/
- mnt_make_longterm(mnt);
+ real_mount(mnt)->mnt_ns = MNT_NS_INTERNAL;
}
return mnt;
}
@@ -2625,7 +2584,9 @@ void kern_unmount(struct vfsmount *mnt)
{
/* release long term mount so mount point can be released */
if (!IS_ERR_OR_NULL(mnt)) {
- mnt_make_shortterm(mnt);
+ br_write_lock(&vfsmount_lock);
+ real_mount(mnt)->mnt_ns = NULL;
+ br_write_unlock(&vfsmount_lock);
mntput(mnt);
}
}
--
cgit v1.2.3-70-g09d2
From 6ce6e24e72233073c8ead9419fc5040d44803dae Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 01:16:59 -0400
Subject: get rid of magic in proc_namespace.c
don't rely on proc_mounts->m being the first field; container_of()
is there for purpose. No need to bother with ->private, while
we are at it - the same container_of will do nicely.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/mount.h | 4 +++-
fs/namespace.c | 6 +++---
fs/proc_namespace.c | 7 +++----
3 files changed, 9 insertions(+), 8 deletions(-)
(limited to 'fs')
diff --git a/fs/mount.h b/fs/mount.h
index 05a2a1185ef..4f291f9de64 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -74,10 +74,12 @@ static inline void get_mnt_ns(struct mnt_namespace *ns)
}
struct proc_mounts {
- struct seq_file m; /* must be the first element */
+ struct seq_file m;
struct mnt_namespace *ns;
struct path root;
int (*show)(struct seq_file *, struct vfsmount *);
};
+#define proc_mounts(p) (container_of((p), struct proc_mounts, m))
+
extern const struct seq_operations mounts_op;
diff --git a/fs/namespace.c b/fs/namespace.c
index a524ea4dbd8..8f412abcb67 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -923,7 +923,7 @@ EXPORT_SYMBOL(replace_mount_options);
/* iterator; we want it to have access to namespace_sem, thus here... */
static void *m_start(struct seq_file *m, loff_t *pos)
{
- struct proc_mounts *p = container_of(m, struct proc_mounts, m);
+ struct proc_mounts *p = proc_mounts(m);
down_read(&namespace_sem);
return seq_list_start(&p->ns->list, *pos);
@@ -931,7 +931,7 @@ static void *m_start(struct seq_file *m, loff_t *pos)
static void *m_next(struct seq_file *m, void *v, loff_t *pos)
{
- struct proc_mounts *p = container_of(m, struct proc_mounts, m);
+ struct proc_mounts *p = proc_mounts(m);
return seq_list_next(v, &p->ns->list, pos);
}
@@ -943,7 +943,7 @@ static void m_stop(struct seq_file *m, void *v)
static int m_show(struct seq_file *m, void *v)
{
- struct proc_mounts *p = container_of(m, struct proc_mounts, m);
+ struct proc_mounts *p = proc_mounts(m);
struct mount *r = list_entry(v, struct mount, mnt_list);
return p->show(m, &r->mnt);
}
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 5e289a7cbad..5fe34c355e8 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -17,7 +17,7 @@
static unsigned mounts_poll(struct file *file, poll_table *wait)
{
- struct proc_mounts *p = file->private_data;
+ struct proc_mounts *p = proc_mounts(file->private_data);
struct mnt_namespace *ns = p->ns;
unsigned res = POLLIN | POLLRDNORM;
@@ -121,7 +121,7 @@ out:
static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
{
- struct proc_mounts *p = m->private;
+ struct proc_mounts *p = proc_mounts(m);
struct mount *r = real_mount(mnt);
struct super_block *sb = mnt->mnt_sb;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
@@ -268,7 +268,6 @@ static int mounts_open_common(struct inode *inode, struct file *file,
if (ret)
goto err_free;
- p->m.private = p;
p->ns = ns;
p->root = root;
p->m.poll_event = ns->event;
@@ -288,7 +287,7 @@ static int mounts_open_common(struct inode *inode, struct file *file,
static int mounts_release(struct inode *inode, struct file *file)
{
- struct proc_mounts *p = file->private_data;
+ struct proc_mounts *p = proc_mounts(file->private_data);
path_put(&p->root);
put_mnt_ns(p->ns);
return seq_release(inode, file);
--
cgit v1.2.3-70-g09d2
From 63a44583f3a4408b902a3d7ba18b4ab13d1309ab Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 11:49:04 -0400
Subject: qnx6: don't bother with ->i_dentry in inode-freeing callback
we'll initialize it in inode_init_always() when we allocate that
object again.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/qnx6/inode.c | 1 -
1 file changed, 1 deletion(-)
(limited to 'fs')
diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
index e44012dc564..2049c814bda 100644
--- a/fs/qnx6/inode.c
+++ b/fs/qnx6/inode.c
@@ -622,7 +622,6 @@ static struct inode *qnx6_alloc_inode(struct super_block *sb)
static void qnx6_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
- INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(qnx6_inode_cachep, QNX6_I(inode));
}
--
cgit v1.2.3-70-g09d2
From e6f9f8d0296aad7fbaf01de38ccaa1bf654bbda4 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 11:50:36 -0400
Subject: cifs: don't bother with ->i_dentry in ->destroy_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/cifs/cifsfs.c | 1 -
1 file changed, 1 deletion(-)
(limited to 'fs')
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 8b6e344eb0b..bcab12c8714 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -257,7 +257,6 @@ cifs_alloc_inode(struct super_block *sb)
static void cifs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
- INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
}
--
cgit v1.2.3-70-g09d2
From 7968ce12e9645c5eb5bb3f4320e43c2e402d580c Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 11:51:12 -0400
Subject: adfs: don't bother with ->i_dentry in ->destroy_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/adfs/super.c | 1 -
1 file changed, 1 deletion(-)
(limited to 'fs')
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 06fdcc9382c..bdaec92353c 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -246,7 +246,6 @@ static struct inode *adfs_alloc_inode(struct super_block *sb)
static void adfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
- INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
}
--
cgit v1.2.3-70-g09d2
From 3084ee95f08ce353ae26c18c7627c4e9786983ca Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 13:03:04 -0400
Subject: affs: get rid of open-coded list_for_each_entry()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/amigaffs.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index 52a6407682e..1c7fd7928d1 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -126,18 +126,13 @@ affs_fix_dcache(struct dentry *dentry, u32 entry_ino)
{
struct inode *inode = dentry->d_inode;
void *data = dentry->d_fsdata;
- struct list_head *head, *next;
spin_lock(&inode->i_lock);
- head = &inode->i_dentry;
- next = head->next;
- while (next != head) {
- dentry = list_entry(next, struct dentry, d_alias);
+ list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
if (entry_ino == (u32)(long)dentry->d_fsdata) {
dentry->d_fsdata = data;
break;
}
- next = next->next;
}
spin_unlock(&inode->i_lock);
}
--
cgit v1.2.3-70-g09d2
From 12447c40394695c9a19920c65fea124bdf3ea034 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 13:06:09 -0400
Subject: affs: unobfuscate affs_fix_dcache()
and add a comment on what it's doing
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/amigaffs.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index 1c7fd7928d1..843cdc99480 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -122,15 +122,13 @@ affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh)
}
static void
-affs_fix_dcache(struct dentry *dentry, u32 entry_ino)
+affs_fix_dcache(struct inode *inode, u32 entry_ino)
{
- struct inode *inode = dentry->d_inode;
- void *data = dentry->d_fsdata;
-
+ struct dentry *dentry;
spin_lock(&inode->i_lock);
list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
if (entry_ino == (u32)(long)dentry->d_fsdata) {
- dentry->d_fsdata = data;
+ dentry->d_fsdata = (void *)inode->i_ino;
break;
}
}
@@ -172,7 +170,11 @@ affs_remove_link(struct dentry *dentry)
}
affs_lock_dir(dir);
- affs_fix_dcache(dentry, link_ino);
+ /*
+ * if there's a dentry for that block, make it
+ * refer to inode itself.
+ */
+ affs_fix_dcache(inode, link_ino);
retval = affs_remove_hash(dir, link_bh);
if (retval) {
affs_unlock_dir(dir);
--
cgit v1.2.3-70-g09d2
From a614a092bf28d58c742b9ec43209f3f78c3d9fb3 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 13:09:15 -0400
Subject: ocfs2: use list_for_each_entry in ocfs2_find_local_alias()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/ocfs2/dcache.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)
(limited to 'fs')
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index e5ba3481833..a40edc1e1d8 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -170,13 +170,10 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
u64 parent_blkno,
int skip_unhashed)
{
- struct list_head *p;
- struct dentry *dentry = NULL;
+ struct dentry *dentry;
spin_lock(&inode->i_lock);
- list_for_each(p, &inode->i_dentry) {
- dentry = list_entry(p, struct dentry, d_alias);
-
+ list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
spin_lock(&dentry->d_lock);
if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
trace_ocfs2_find_local_alias(dentry->d_name.len,
@@ -184,16 +181,13 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
dget_dlock(dentry);
spin_unlock(&dentry->d_lock);
- break;
+ spin_unlock(&inode->i_lock);
+ return dentry;
}
spin_unlock(&dentry->d_lock);
-
- dentry = NULL;
}
-
spin_unlock(&inode->i_lock);
-
- return dentry;
+ return NULL;
}
DEFINE_SPINLOCK(dentry_attach_lock);
--
cgit v1.2.3-70-g09d2
From 9f713878f22e0b2d34d62df0ca55f65166375634 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 13:19:12 -0400
Subject: ext4: get rid of open-coded d_find_any_alias()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/ext4/fsync.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
(limited to 'fs')
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index bb6c7d81131..4359a4d3006 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -135,14 +135,7 @@ static int ext4_sync_parent(struct inode *inode)
inode = igrab(inode);
while (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY)) {
ext4_clear_inode_state(inode, EXT4_STATE_NEWENTRY);
- dentry = NULL;
- spin_lock(&inode->i_lock);
- if (!list_empty(&inode->i_dentry)) {
- dentry = list_first_entry(&inode->i_dentry,
- struct dentry, d_alias);
- dget(dentry);
- }
- spin_unlock(&inode->i_lock);
+ dentry = d_find_any_alias(inode);
if (!dentry)
break;
next = igrab(dentry->d_parent->d_inode);
--
cgit v1.2.3-70-g09d2
From b3d9b7a3c752dc4b6976a4ff7b8298887a5b734d Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 13:51:19 -0400
Subject: vfs: switch i_dentry/d_alias to hlist
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/affs/amigaffs.c | 3 ++-
fs/btrfs/inode.c | 2 +-
fs/cifs/inode.c | 5 +++--
fs/dcache.c | 33 ++++++++++++++++++---------------
fs/exportfs/expfs.c | 3 ++-
fs/ext4/fsync.c | 2 +-
fs/fuse/dir.c | 2 +-
fs/inode.c | 2 +-
fs/nfs/getroot.c | 2 +-
fs/notify/fsnotify.c | 3 ++-
fs/ocfs2/dcache.c | 3 ++-
include/linux/dcache.h | 2 +-
include/linux/fs.h | 2 +-
13 files changed, 36 insertions(+), 28 deletions(-)
(limited to 'fs')
diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index 843cdc99480..eb82ee53ee0 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -125,8 +125,9 @@ static void
affs_fix_dcache(struct inode *inode, u32 entry_ino)
{
struct dentry *dentry;
+ struct hlist_node *p;
spin_lock(&inode->i_lock);
- list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
if (entry_ino == (u32)(long)dentry->d_fsdata) {
dentry->d_fsdata = (void *)inode->i_ino;
break;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a7d1921ac76..a101572f1ce 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6987,7 +6987,7 @@ void btrfs_destroy_inode(struct inode *inode)
struct btrfs_ordered_extent *ordered;
struct btrfs_root *root = BTRFS_I(inode)->root;
- WARN_ON(!list_empty(&inode->i_dentry));
+ WARN_ON(!hlist_empty(&inode->i_dentry));
WARN_ON(inode->i_data.nrpages);
WARN_ON(BTRFS_I(inode)->outstanding_extents);
WARN_ON(BTRFS_I(inode)->reserved_extents);
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 745da3d0653..8e8bb49112f 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -800,7 +800,7 @@ cifs_find_inode(struct inode *inode, void *opaque)
return 0;
/* if it's not a directory or has no dentries, then flag it */
- if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry))
+ if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
return 1;
@@ -825,9 +825,10 @@ static bool
inode_has_hashed_dentries(struct inode *inode)
{
struct dentry *dentry;
+ struct hlist_node *p;
spin_lock(&inode->i_lock);
- list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
spin_unlock(&inode->i_lock);
return true;
diff --git a/fs/dcache.c b/fs/dcache.c
index 44acb5b29ae..015586f1ffc 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -218,7 +218,7 @@ static void __d_free(struct rcu_head *head)
{
struct dentry *dentry = container_of(head, struct dentry, d_u.d_rcu);
- WARN_ON(!list_empty(&dentry->d_alias));
+ WARN_ON(!hlist_unhashed(&dentry->d_alias));
if (dname_external(dentry))
kfree(dentry->d_name.name);
kmem_cache_free(dentry_cache, dentry);
@@ -267,7 +267,7 @@ static void dentry_iput(struct dentry * dentry)
struct inode *inode = dentry->d_inode;
if (inode) {
dentry->d_inode = NULL;
- list_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_alias);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
if (!inode->i_nlink)
@@ -291,7 +291,7 @@ static void dentry_unlink_inode(struct dentry * dentry)
{
struct inode *inode = dentry->d_inode;
dentry->d_inode = NULL;
- list_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_alias);
dentry_rcuwalk_barrier(dentry);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
@@ -699,10 +699,11 @@ EXPORT_SYMBOL(dget_parent);
static struct dentry *__d_find_alias(struct inode *inode, int want_discon)
{
struct dentry *alias, *discon_alias;
+ struct hlist_node *p;
again:
discon_alias = NULL;
- list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
spin_lock(&alias->d_lock);
if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
if (IS_ROOT(alias) &&
@@ -737,7 +738,7 @@ struct dentry *d_find_alias(struct inode *inode)
{
struct dentry *de = NULL;
- if (!list_empty(&inode->i_dentry)) {
+ if (!hlist_empty(&inode->i_dentry)) {
spin_lock(&inode->i_lock);
de = __d_find_alias(inode, 0);
spin_unlock(&inode->i_lock);
@@ -753,9 +754,10 @@ EXPORT_SYMBOL(d_find_alias);
void d_prune_aliases(struct inode *inode)
{
struct dentry *dentry;
+ struct hlist_node *p;
restart:
spin_lock(&inode->i_lock);
- list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
spin_lock(&dentry->d_lock);
if (!dentry->d_count) {
__dget_dlock(dentry);
@@ -977,7 +979,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
inode = dentry->d_inode;
if (inode) {
dentry->d_inode = NULL;
- list_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_alias);
if (dentry->d_op && dentry->d_op->d_iput)
dentry->d_op->d_iput(dentry, inode);
else
@@ -1312,7 +1314,7 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
INIT_HLIST_BL_NODE(&dentry->d_hash);
INIT_LIST_HEAD(&dentry->d_lru);
INIT_LIST_HEAD(&dentry->d_subdirs);
- INIT_LIST_HEAD(&dentry->d_alias);
+ INIT_HLIST_NODE(&dentry->d_alias);
INIT_LIST_HEAD(&dentry->d_u.d_child);
d_set_d_op(dentry, dentry->d_sb->s_d_op);
@@ -1400,7 +1402,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
if (inode) {
if (unlikely(IS_AUTOMOUNT(inode)))
dentry->d_flags |= DCACHE_NEED_AUTOMOUNT;
- list_add(&dentry->d_alias, &inode->i_dentry);
+ hlist_add_head(&dentry->d_alias, &inode->i_dentry);
}
dentry->d_inode = inode;
dentry_rcuwalk_barrier(dentry);
@@ -1425,7 +1427,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
void d_instantiate(struct dentry *entry, struct inode * inode)
{
- BUG_ON(!list_empty(&entry->d_alias));
+ BUG_ON(!hlist_unhashed(&entry->d_alias));
if (inode)
spin_lock(&inode->i_lock);
__d_instantiate(entry, inode);
@@ -1458,13 +1460,14 @@ static struct dentry *__d_instantiate_unique(struct dentry *entry,
int len = entry->d_name.len;
const char *name = entry->d_name.name;
unsigned int hash = entry->d_name.hash;
+ struct hlist_node *p;
if (!inode) {
__d_instantiate(entry, NULL);
return NULL;
}
- list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
/*
* Don't need alias->d_lock here, because aliases with
* d_parent == entry->d_parent are not subject to name or
@@ -1490,7 +1493,7 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
{
struct dentry *result;
- BUG_ON(!list_empty(&entry->d_alias));
+ BUG_ON(!hlist_unhashed(&entry->d_alias));
if (inode)
spin_lock(&inode->i_lock);
@@ -1531,9 +1534,9 @@ static struct dentry * __d_find_any_alias(struct inode *inode)
{
struct dentry *alias;
- if (list_empty(&inode->i_dentry))
+ if (hlist_empty(&inode->i_dentry))
return NULL;
- alias = list_first_entry(&inode->i_dentry, struct dentry, d_alias);
+ alias = hlist_entry(inode->i_dentry.first, struct dentry, d_alias);
__dget(alias);
return alias;
}
@@ -1607,7 +1610,7 @@ struct dentry *d_obtain_alias(struct inode *inode)
spin_lock(&tmp->d_lock);
tmp->d_inode = inode;
tmp->d_flags |= DCACHE_DISCONNECTED;
- list_add(&tmp->d_alias, &inode->i_dentry);
+ hlist_add_head(&tmp->d_alias, &inode->i_dentry);
hlist_bl_lock(&tmp->d_sb->s_anon);
hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon);
hlist_bl_unlock(&tmp->d_sb->s_anon);
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index b0201ca6e9c..b42063cf1b2 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -44,13 +44,14 @@ find_acceptable_alias(struct dentry *result,
{
struct dentry *dentry, *toput = NULL;
struct inode *inode;
+ struct hlist_node *p;
if (acceptable(context, result))
return result;
inode = result->d_inode;
spin_lock(&inode->i_lock);
- list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
dget(dentry);
spin_unlock(&inode->i_lock);
if (toput)
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 4359a4d3006..2a1dcea4f12 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -225,7 +225,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
if (!journal) {
ret = __sync_inode(inode, datasync);
- if (!ret && !list_empty(&inode->i_dentry))
+ if (!ret && !hlist_empty(&inode->i_dentry))
ret = ext4_sync_parent(inode);
goto out;
}
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 334e0b18a01..f7543f72897 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -249,7 +249,7 @@ static struct dentry *fuse_d_add_directory(struct dentry *entry,
/* This tries to shrink the subtree below alias */
fuse_invalidate_entry(alias);
dput(alias);
- if (!list_empty(&inode->i_dentry))
+ if (!hlist_empty(&inode->i_dentry))
return ERR_PTR(-EBUSY);
} else {
dput(alias);
diff --git a/fs/inode.c b/fs/inode.c
index c99163b1b31..775cbabd4fa 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -182,7 +182,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
}
inode->i_private = NULL;
inode->i_mapping = mapping;
- INIT_LIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
+ INIT_HLIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
#ifdef CONFIG_FS_POSIX_ACL
inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
#endif
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 8abfb19bd3a..a67990f90bd 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -62,7 +62,7 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
*/
spin_lock(&sb->s_root->d_inode->i_lock);
spin_lock(&sb->s_root->d_lock);
- list_del_init(&sb->s_root->d_alias);
+ hlist_del_init(&sb->s_root->d_alias);
spin_unlock(&sb->s_root->d_lock);
spin_unlock(&sb->s_root->d_inode->i_lock);
}
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index b39c5c161ad..6baadb5a843 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -52,6 +52,7 @@ void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
void __fsnotify_update_child_dentry_flags(struct inode *inode)
{
struct dentry *alias;
+ struct hlist_node *p;
int watched;
if (!S_ISDIR(inode->i_mode))
@@ -63,7 +64,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
spin_lock(&inode->i_lock);
/* run all of the dentries associated with this inode. Since this is a
* directory, there damn well better only be one item on this list */
- list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
struct dentry *child;
/* run all of the children of the original inode and fix their
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index a40edc1e1d8..af4488268e4 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -170,10 +170,11 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
u64 parent_blkno,
int skip_unhashed)
{
+ struct hlist_node *p;
struct dentry *dentry;
spin_lock(&inode->i_lock);
- list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
spin_lock(&dentry->d_lock);
if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
trace_ocfs2_find_local_alias(dentry->d_name.len,
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 094789ff3e9..8ca25551820 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -128,7 +128,7 @@ struct dentry {
struct rcu_head d_rcu;
} d_u;
struct list_head d_subdirs; /* our children */
- struct list_head d_alias; /* inode alias list */
+ struct hlist_node d_alias; /* inode alias list */
};
/*
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 17fd887c798..f06db6bd5a7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -826,7 +826,7 @@ struct inode {
struct list_head i_lru; /* inode LRU list */
struct list_head i_sb_list;
union {
- struct list_head i_dentry;
+ struct hlist_head i_dentry;
struct rcu_head i_rcu;
};
u64 i_version;
--
cgit v1.2.3-70-g09d2
From 1d674107ea4b68669e012e654d64369b7f2bb250 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 19:52:19 -0400
Subject: coda: use list_for_each_entry
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/coda/cache.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
(limited to 'fs')
diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index 69015787618..958ae0e0ff8 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -89,17 +89,13 @@ int coda_cache_check(struct inode *inode, int mask)
/* this won't do any harm: just flag all children */
static void coda_flag_children(struct dentry *parent, int flag)
{
- struct list_head *child;
struct dentry *de;
spin_lock(&parent->d_lock);
- list_for_each(child, &parent->d_subdirs)
- {
- de = list_entry(child, struct dentry, d_u.d_child);
+ list_for_each_entry(de, &parent->d_subdirs, d_u.d_child) {
/* don't know what to do with negative dentries */
- if ( ! de->d_inode )
- continue;
- coda_flag_inode(de->d_inode, flag);
+ if (de->d_inode )
+ coda_flag_inode(de->d_inode, flag);
}
spin_unlock(&parent->d_lock);
return;
--
cgit v1.2.3-70-g09d2
From 6d7b5aaed7d887b34f29f900244cdbd17a86637c Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 04:15:17 -0400
Subject: namei.c: let follow_link() do put_link() on failure
no need for kludgy "set cookie to ERR_PTR(...) because we failed
before we did actual ->follow_link() and want to suppress put_link()",
no pointless check in put_link() itself.
Callers checked if follow_link() has failed anyway; might as well
break out of their loops if that happened, without bothering
to call put_link() first.
[AV: folded fixes from hch]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 74 ++++++++++++++++++++++++++++++++++----------------------------
1 file changed, 41 insertions(+), 33 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 7d694194024..6135a14d5a8 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -605,7 +605,7 @@ static inline void path_to_nameidata(const struct path *path,
static inline void put_link(struct nameidata *nd, struct path *link, void *cookie)
{
struct inode *inode = link->dentry->d_inode;
- if (!IS_ERR(cookie) && inode->i_op->put_link)
+ if (inode->i_op->put_link)
inode->i_op->put_link(link->dentry, nd, cookie);
path_put(link);
}
@@ -613,19 +613,19 @@ static inline void put_link(struct nameidata *nd, struct path *link, void *cooki
static __always_inline int
follow_link(struct path *link, struct nameidata *nd, void **p)
{
- int error;
struct dentry *dentry = link->dentry;
+ int error;
+ char *s;
BUG_ON(nd->flags & LOOKUP_RCU);
if (link->mnt == nd->path.mnt)
mntget(link->mnt);
- if (unlikely(current->total_link_count >= 40)) {
- *p = ERR_PTR(-ELOOP); /* no ->put_link(), please */
- path_put(&nd->path);
- return -ELOOP;
- }
+ error = -ELOOP;
+ if (unlikely(current->total_link_count >= 40))
+ goto out_put_nd_path;
+
cond_resched();
current->total_link_count++;
@@ -633,30 +633,37 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
nd_set_link(nd, NULL);
error = security_inode_follow_link(link->dentry, nd);
- if (error) {
- *p = ERR_PTR(error); /* no ->put_link(), please */
- path_put(&nd->path);
- return error;
- }
+ if (error)
+ goto out_put_nd_path;
nd->last_type = LAST_BIND;
*p = dentry->d_inode->i_op->follow_link(dentry, nd);
error = PTR_ERR(*p);
- if (!IS_ERR(*p)) {
- char *s = nd_get_link(nd);
- error = 0;
- if (s)
- error = __vfs_follow_link(nd, s);
- else if (nd->last_type == LAST_BIND) {
- nd->flags |= LOOKUP_JUMPED;
- nd->inode = nd->path.dentry->d_inode;
- if (nd->inode->i_op->follow_link) {
- /* stepped on a _really_ weird one */
- path_put(&nd->path);
- error = -ELOOP;
- }
+ if (IS_ERR(*p))
+ goto out_put_link;
+
+ error = 0;
+ s = nd_get_link(nd);
+ if (s) {
+ error = __vfs_follow_link(nd, s);
+ } else if (nd->last_type == LAST_BIND) {
+ nd->flags |= LOOKUP_JUMPED;
+ nd->inode = nd->path.dentry->d_inode;
+ if (nd->inode->i_op->follow_link) {
+ /* stepped on a _really_ weird one */
+ path_put(&nd->path);
+ error = -ELOOP;
}
}
+ if (unlikely(error))
+ put_link(nd, link, *p);
+
+ return error;
+
+out_put_nd_path:
+ path_put(&nd->path);
+out_put_link:
+ path_put(link);
return error;
}
@@ -1383,9 +1390,10 @@ static inline int nested_symlink(struct path *path, struct nameidata *nd)
void *cookie;
res = follow_link(&link, nd, &cookie);
- if (!res)
- res = walk_component(nd, path, &nd->last,
- nd->last_type, LOOKUP_FOLLOW);
+ if (res)
+ break;
+ res = walk_component(nd, path, &nd->last,
+ nd->last_type, LOOKUP_FOLLOW);
put_link(nd, &link, cookie);
} while (res > 0);
@@ -1777,8 +1785,9 @@ static int path_lookupat(int dfd, const char *name,
struct path link = path;
nd->flags |= LOOKUP_PARENT;
err = follow_link(&link, nd, &cookie);
- if (!err)
- err = lookup_last(nd, &path);
+ if (err)
+ break;
+ err = lookup_last(nd, &path);
put_link(nd, &link, cookie);
}
}
@@ -2475,9 +2484,8 @@ static struct file *path_openat(int dfd, const char *pathname,
nd->flags &= ~(LOOKUP_OPEN|LOOKUP_CREATE|LOOKUP_EXCL);
error = follow_link(&link, nd, &cookie);
if (unlikely(error))
- filp = ERR_PTR(error);
- else
- filp = do_last(nd, &path, op, pathname);
+ goto out_filp;
+ filp = do_last(nd, &path, op, pathname);
put_link(nd, &link, cookie);
}
out:
--
cgit v1.2.3-70-g09d2
From 37d7fffc9cafe75ded8a840fa30ba625f99ed7ae Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:12 +0200
Subject: vfs: do_last(): inline lookup_slow()
Copy lookup_slow() into do_last().
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 6135a14d5a8..68742e3cb98 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2254,9 +2254,22 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
if (error < 0)
goto exit;
- error = lookup_slow(nd, &nd->last, path);
- if (error < 0)
+ BUG_ON(nd->inode != dir->d_inode);
+
+ mutex_lock(&dir->d_inode->i_mutex);
+ dentry = __lookup_hash(&nd->last, dir, nd);
+ mutex_unlock(&dir->d_inode->i_mutex);
+ error = PTR_ERR(dentry);
+ if (IS_ERR(dentry))
goto exit;
+ path->mnt = nd->path.mnt;
+ path->dentry = dentry;
+ error = follow_managed(path, nd->flags);
+ if (unlikely(error < 0))
+ goto exit_dput;
+
+ if (error)
+ nd->flags |= LOOKUP_JUMPED;
inode = path->dentry->d_inode;
}
--
cgit v1.2.3-70-g09d2
From b6183df7b294997a748eeb9991daa126986ead12 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:13 +0200
Subject: vfs: do_last(): separate O_CREAT specific code
Check O_CREAT on the slow lookup paths where necessary. This allows the rest to
be shared with plain open.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 68742e3cb98..12ed29712b4 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2274,22 +2274,23 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
inode = path->dentry->d_inode;
}
goto finish_lookup;
- }
-
- /* create side of things */
- /*
- * This will *only* deal with leaving RCU mode - LOOKUP_JUMPED has been
- * cleared when we got to the last component we are about to look up
- */
- error = complete_walk(nd);
- if (error)
- return ERR_PTR(error);
+ } else {
+ /* create side of things */
+ /*
+ * This will *only* deal with leaving RCU mode - LOOKUP_JUMPED
+ * has been cleared when we got to the last component we are
+ * about to look up
+ */
+ error = complete_walk(nd);
+ if (error)
+ return ERR_PTR(error);
- audit_inode(pathname, dir);
- error = -EISDIR;
- /* trailing slashes? */
- if (nd->last.name[nd->last.len])
- goto exit;
+ audit_inode(pathname, dir);
+ error = -EISDIR;
+ /* trailing slashes? */
+ if (nd->last.name[nd->last.len])
+ goto exit;
+ }
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
@@ -2305,7 +2306,7 @@ retry_lookup:
path->mnt = nd->path.mnt;
/* Negative dentry, just create the file */
- if (!dentry->d_inode) {
+ if (!dentry->d_inode && (open_flag & O_CREAT)) {
umode_t mode = op->mode;
if (!IS_POSIXACL(dir->d_inode))
mode &= ~current_umask();
--
cgit v1.2.3-70-g09d2
From 7157486541bffc0dfec912e21ae639b029dae3d3 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:14 +0200
Subject: vfs: do_last(): common slow lookup
Make the slow lookup part of O_CREAT and non-O_CREAT opens common.
This allows atomic_open to be hooked into the slow lookup part.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 27 +++++----------------------
1 file changed, 5 insertions(+), 22 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 12ed29712b4..285e62e925f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2250,30 +2250,13 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
symlink_ok = 1;
/* we _can_ be in RCU mode here */
error = lookup_fast(nd, &nd->last, path, &inode);
- if (unlikely(error)) {
- if (error < 0)
- goto exit;
-
- BUG_ON(nd->inode != dir->d_inode);
-
- mutex_lock(&dir->d_inode->i_mutex);
- dentry = __lookup_hash(&nd->last, dir, nd);
- mutex_unlock(&dir->d_inode->i_mutex);
- error = PTR_ERR(dentry);
- if (IS_ERR(dentry))
- goto exit;
- path->mnt = nd->path.mnt;
- path->dentry = dentry;
- error = follow_managed(path, nd->flags);
- if (unlikely(error < 0))
- goto exit_dput;
+ if (likely(!error))
+ goto finish_lookup;
- if (error)
- nd->flags |= LOOKUP_JUMPED;
+ if (error < 0)
+ goto exit;
- inode = path->dentry->d_inode;
- }
- goto finish_lookup;
+ BUG_ON(nd->inode != dir->d_inode);
} else {
/* create side of things */
/*
--
cgit v1.2.3-70-g09d2
From d58ffd35c1e595df2cf8ac4803f178c8be95ca7a Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:15 +0200
Subject: vfs: add lookup_open()
Split out lookup + maybe create from do_last(). This is the part under i_mutex
protection.
The function is called lookup_open() and returns a filp even though the open
part is not used yet.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 99 ++++++++++++++++++++++++++++++++++++++------------------------
1 file changed, 61 insertions(+), 38 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 285e62e925f..fad7117dbb2 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2196,6 +2196,60 @@ static inline int open_to_namei_flags(int flag)
return flag;
}
+/*
+ * Lookup, maybe create and open the last component
+ *
+ * Must be called with i_mutex held on parent.
+ *
+ * Returns open file or NULL on success, error otherwise. NULL means no open
+ * was performed, only lookup.
+ */
+static struct file *lookup_open(struct nameidata *nd, struct path *path,
+ const struct open_flags *op,
+ int *want_write, bool *created)
+{
+ struct dentry *dir = nd->path.dentry;
+ struct dentry *dentry;
+ int error;
+
+ *created = false;
+ dentry = lookup_hash(nd);
+ if (IS_ERR(dentry))
+ return ERR_CAST(dentry);
+
+ /* Negative dentry, just create the file */
+ if (!dentry->d_inode && (op->open_flag & O_CREAT)) {
+ umode_t mode = op->mode;
+ if (!IS_POSIXACL(dir->d_inode))
+ mode &= ~current_umask();
+ /*
+ * This write is needed to ensure that a
+ * rw->ro transition does not occur between
+ * the time when the file is created and when
+ * a permanent write count is taken through
+ * the 'struct file' in nameidata_to_filp().
+ */
+ error = mnt_want_write(nd->path.mnt);
+ if (error)
+ goto out_dput;
+ *want_write = 1;
+ *created = true;
+ error = security_path_mknod(&nd->path, dentry, mode, 0);
+ if (error)
+ goto out_dput;
+ error = vfs_create(dir->d_inode, dentry, mode, nd);
+ if (error)
+ goto out_dput;
+ }
+ path->dentry = dentry;
+ path->mnt = nd->path.mnt;
+ return NULL;
+
+out_dput:
+ dput(dentry);
+ return ERR_PTR(error);
+}
+
/*
* Handle the last step of open()
*/
@@ -2203,13 +2257,13 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
const struct open_flags *op, const char *pathname)
{
struct dentry *dir = nd->path.dentry;
- struct dentry *dentry;
int open_flag = op->open_flag;
int will_truncate = open_flag & O_TRUNC;
int want_write = 0;
int acc_mode = op->acc_mode;
struct file *filp;
struct inode *inode;
+ bool created;
int symlink_ok = 0;
struct path save_parent = { .dentry = NULL, .mnt = NULL };
bool retried = false;
@@ -2277,53 +2331,24 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
+ filp = lookup_open(nd, path, op, &want_write, &created);
+ mutex_unlock(&dir->d_inode->i_mutex);
- dentry = lookup_hash(nd);
- error = PTR_ERR(dentry);
- if (IS_ERR(dentry)) {
- mutex_unlock(&dir->d_inode->i_mutex);
- goto exit;
- }
-
- path->dentry = dentry;
- path->mnt = nd->path.mnt;
+ if (IS_ERR(filp))
+ goto out;
- /* Negative dentry, just create the file */
- if (!dentry->d_inode && (open_flag & O_CREAT)) {
- umode_t mode = op->mode;
- if (!IS_POSIXACL(dir->d_inode))
- mode &= ~current_umask();
- /*
- * This write is needed to ensure that a
- * rw->ro transition does not occur between
- * the time when the file is created and when
- * a permanent write count is taken through
- * the 'struct file' in nameidata_to_filp().
- */
- error = mnt_want_write(nd->path.mnt);
- if (error)
- goto exit_mutex_unlock;
- want_write = 1;
+ if (created) {
/* Don't check for write permission, don't truncate */
open_flag &= ~O_TRUNC;
will_truncate = 0;
acc_mode = MAY_OPEN;
- error = security_path_mknod(&nd->path, dentry, mode, 0);
- if (error)
- goto exit_mutex_unlock;
- error = vfs_create(dir->d_inode, dentry, mode, nd);
- if (error)
- goto exit_mutex_unlock;
- mutex_unlock(&dir->d_inode->i_mutex);
- dput(nd->path.dentry);
- nd->path.dentry = dentry;
+ path_to_nameidata(path, nd);
goto common;
}
/*
* It already exists.
*/
- mutex_unlock(&dir->d_inode->i_mutex);
audit_inode(pathname, path->dentry);
error = -EEXIST;
@@ -2432,8 +2457,6 @@ out:
terminate_walk(nd);
return filp;
-exit_mutex_unlock:
- mutex_unlock(&dir->d_inode->i_mutex);
exit_dput:
path_put_conditional(path, nd);
exit:
--
cgit v1.2.3-70-g09d2
From 54ef487241e863a6046536ac5b1fcd5d7cde86e5 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:16 +0200
Subject: vfs: lookup_open(): expand lookup_hash()
Copy __lookup_hash() into lookup_open(). The next patch will insert the atomic
open call just before the real lookup.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index fad7117dbb2..ccb0eb17f52 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2209,14 +2209,24 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
int *want_write, bool *created)
{
struct dentry *dir = nd->path.dentry;
+ struct inode *dir_inode = dir->d_inode;
struct dentry *dentry;
int error;
+ bool need_lookup;
*created = false;
- dentry = lookup_hash(nd);
+ dentry = lookup_dcache(&nd->last, dir, nd, &need_lookup);
if (IS_ERR(dentry))
return ERR_CAST(dentry);
+ if (need_lookup) {
+ BUG_ON(dentry->d_inode);
+
+ dentry = lookup_real(dir_inode, dentry, nd);
+ if (IS_ERR(dentry))
+ return ERR_CAST(dentry);
+ }
+
/* Negative dentry, just create the file */
if (!dentry->d_inode && (op->open_flag & O_CREAT)) {
umode_t mode = op->mode;
--
cgit v1.2.3-70-g09d2
From d18e9008c377dc6a6d2166a6840bf3a23a5867fd Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:17 +0200
Subject: vfs: add i_op->atomic_open()
Add a new inode operation which is called on the last component of an open.
Using this the filesystem can look up, possibly create and open the file in one
atomic operation. If it cannot perform this (e.g. the file type turned out to
be wrong) it may signal this by returning NULL instead of an open struct file
pointer.
i_op->atomic_open() is only called if the last component is negative or needs
lookup. Handling cached positive dentries here doesn't add much value: these
can be opened using f_op->open(). If the cached file turns out to be invalid,
the open can be retried, this time using ->atomic_open() with a fresh dentry.
For now leave the old way of using open intents in lookup and revalidate in
place. This will be removed once all the users are converted.
David Howells noticed that if ->atomic_open() opens the file but does not create
it, handle_truncate() will be called on it even if it is not a regular file.
Fix this by checking the file type in this case too.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Documentation/filesystems/Locking | 4 +
Documentation/filesystems/vfs.txt | 11 +++
fs/internal.h | 5 +
fs/namei.c | 203 +++++++++++++++++++++++++++++++++++++-
fs/open.c | 42 ++++++++
include/linux/fs.h | 7 ++
6 files changed, 270 insertions(+), 2 deletions(-)
(limited to 'fs')
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 8e2da1e06e3..8157488c346 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -62,6 +62,9 @@ ata *);
int (*removexattr) (struct dentry *, const char *);
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
void (*update_time)(struct inode *, struct timespec *, int);
+ struct file * (*atomic_open)(struct inode *, struct dentry *,
+ struct opendata *, unsigned open_flag,
+ umode_t create_mode, bool *created);
locking rules:
all may block
@@ -89,6 +92,7 @@ listxattr: no
removexattr: yes
fiemap: no
update_time: no
+atomic_open: yes
Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
victim.
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index efd23f48170..beb6e691f70 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -364,6 +364,9 @@ struct inode_operations {
ssize_t (*listxattr) (struct dentry *, char *, size_t);
int (*removexattr) (struct dentry *, const char *);
void (*update_time)(struct inode *, struct timespec *, int);
+ struct file * (*atomic_open)(struct inode *, struct dentry *,
+ struct opendata *, unsigned open_flag,
+ umode_t create_mode, bool *created);
};
Again, all methods are called without any locks being held, unless
@@ -476,6 +479,14 @@ otherwise noted.
an inode. If this is not defined the VFS will update the inode itself
and call mark_inode_dirty_sync.
+ atomic_open: called on the last component of an open. Using this optional
+ method the filesystem can look up, possibly create and open the file in
+ one atomic operation. If it cannot perform this (e.g. the file type
+ turned out to be wrong) it may signal this by returning NULL instead of
+ an open struct file pointer. This method is only called if the last
+ component is negative or needs lookup. Cached positive dentries are
+ still handled by f_op->open().
+
The Address Space Object
========================
diff --git a/fs/internal.h b/fs/internal.h
index d2a23ff61b4..70067775df2 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -85,6 +85,11 @@ extern struct super_block *user_get_super(dev_t);
struct nameidata;
extern struct file *nameidata_to_filp(struct nameidata *);
extern void release_open_intent(struct nameidata *);
+struct opendata {
+ struct dentry *dentry;
+ struct vfsmount *mnt;
+ struct file **filp;
+};
struct open_flags {
int open_flag;
umode_t mode;
diff --git a/fs/namei.c b/fs/namei.c
index ccb0eb17f52..9e11ae83bff 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2196,6 +2196,176 @@ static inline int open_to_namei_flags(int flag)
return flag;
}
+static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
+{
+ int error = security_path_mknod(dir, dentry, mode, 0);
+ if (error)
+ return error;
+
+ error = inode_permission(dir->dentry->d_inode, MAY_WRITE | MAY_EXEC);
+ if (error)
+ return error;
+
+ return security_inode_create(dir->dentry->d_inode, dentry, mode);
+}
+
+static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
+ struct path *path, const struct open_flags *op,
+ int *want_write, bool need_lookup,
+ bool *created)
+{
+ struct inode *dir = nd->path.dentry->d_inode;
+ unsigned open_flag = open_to_namei_flags(op->open_flag);
+ umode_t mode;
+ int error;
+ int acc_mode;
+ struct opendata od;
+ struct file *filp;
+ int create_error = 0;
+ struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
+
+ BUG_ON(dentry->d_inode);
+
+ /* Don't create child dentry for a dead directory. */
+ if (unlikely(IS_DEADDIR(dir))) {
+ filp = ERR_PTR(-ENOENT);
+ goto out;
+ }
+
+ mode = op->mode & S_IALLUGO;
+ if ((open_flag & O_CREAT) && !IS_POSIXACL(dir))
+ mode &= ~current_umask();
+
+ if (open_flag & O_EXCL) {
+ open_flag &= ~O_TRUNC;
+ *created = true;
+ }
+
+ /*
+ * Checking write permission is tricky, bacuse we don't know if we are
+ * going to actually need it: O_CREAT opens should work as long as the
+ * file exists. But checking existence breaks atomicity. The trick is
+ * to check access and if not granted clear O_CREAT from the flags.
+ *
+ * Another problem is returing the "right" error value (e.g. for an
+ * O_EXCL open we want to return EEXIST not EROFS).
+ */
+ if ((open_flag & (O_CREAT | O_TRUNC)) ||
+ (open_flag & O_ACCMODE) != O_RDONLY) {
+ error = mnt_want_write(nd->path.mnt);
+ if (!error) {
+ *want_write = 1;
+ } else if (!(open_flag & O_CREAT)) {
+ /*
+ * No O_CREATE -> atomicity not a requirement -> fall
+ * back to lookup + open
+ */
+ goto no_open;
+ } else if (open_flag & (O_EXCL | O_TRUNC)) {
+ /* Fall back and fail with the right error */
+ create_error = error;
+ goto no_open;
+ } else {
+ /* No side effects, safe to clear O_CREAT */
+ create_error = error;
+ open_flag &= ~O_CREAT;
+ }
+ }
+
+ if (open_flag & O_CREAT) {
+ error = may_o_create(&nd->path, dentry, op->mode);
+ if (error) {
+ create_error = error;
+ if (open_flag & O_EXCL)
+ goto no_open;
+ open_flag &= ~O_CREAT;
+ }
+ }
+
+ if (nd->flags & LOOKUP_DIRECTORY)
+ open_flag |= O_DIRECTORY;
+
+ od.dentry = DENTRY_NOT_SET;
+ od.mnt = nd->path.mnt;
+ od.filp = &nd->intent.open.file;
+ filp = dir->i_op->atomic_open(dir, dentry, &od, open_flag, mode,
+ created);
+ if (IS_ERR(filp)) {
+ if (WARN_ON(od.dentry != DENTRY_NOT_SET))
+ dput(od.dentry);
+
+ if (create_error && PTR_ERR(filp) == -ENOENT)
+ filp = ERR_PTR(create_error);
+ goto out;
+ }
+
+ acc_mode = op->acc_mode;
+ if (*created) {
+ fsnotify_create(dir, dentry);
+ acc_mode = MAY_OPEN;
+ }
+
+ if (!filp) {
+ if (WARN_ON(od.dentry == DENTRY_NOT_SET)) {
+ filp = ERR_PTR(-EIO);
+ goto out;
+ }
+ if (od.dentry) {
+ dput(dentry);
+ dentry = od.dentry;
+ }
+ goto looked_up;
+ }
+
+ /*
+ * We didn't have the inode before the open, so check open permission
+ * here.
+ */
+ error = may_open(&filp->f_path, acc_mode, open_flag);
+ if (error)
+ goto out_fput;
+
+ error = open_check_o_direct(filp);
+ if (error)
+ goto out_fput;
+
+out:
+ dput(dentry);
+ return filp;
+
+out_fput:
+ fput(filp);
+ filp = ERR_PTR(error);
+ goto out;
+
+no_open:
+ if (need_lookup) {
+ dentry = lookup_real(dir, dentry, nd);
+ if (IS_ERR(dentry))
+ return ERR_CAST(dentry);
+
+ if (create_error) {
+ int open_flag = op->open_flag;
+
+ filp = ERR_PTR(create_error);
+ if ((open_flag & O_EXCL)) {
+ if (!dentry->d_inode)
+ goto out;
+ } else if (!dentry->d_inode) {
+ goto out;
+ } else if ((open_flag & O_TRUNC) &&
+ S_ISREG(dentry->d_inode->i_mode)) {
+ goto out;
+ }
+ /* will fail later, go on to get the right error */
+ }
+ }
+looked_up:
+ path->dentry = dentry;
+ path->mnt = nd->path.mnt;
+ return NULL;
+}
+
/*
* Lookup, maybe create and open the last component
*
@@ -2219,6 +2389,15 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
if (IS_ERR(dentry))
return ERR_CAST(dentry);
+ /* Cached positive dentry: will open in f_op->open */
+ if (!need_lookup && dentry->d_inode)
+ goto out_no_open;
+
+ if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
+ return atomic_open(nd, dentry, path, op, want_write,
+ need_lookup, created);
+ }
+
if (need_lookup) {
BUG_ON(dentry->d_inode);
@@ -2251,6 +2430,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
if (error)
goto out_dput;
}
+out_no_open:
path->dentry = dentry;
path->mnt = nd->path.mnt;
return NULL;
@@ -2344,8 +2524,16 @@ retry_lookup:
filp = lookup_open(nd, path, op, &want_write, &created);
mutex_unlock(&dir->d_inode->i_mutex);
- if (IS_ERR(filp))
- goto out;
+ if (filp) {
+ if (IS_ERR(filp))
+ goto out;
+
+ if (created || !S_ISREG(filp->f_path.dentry->d_inode->i_mode))
+ will_truncate = 0;
+
+ audit_inode(pathname, filp->f_path.dentry);
+ goto opened;
+ }
if (created) {
/* Don't check for write permission, don't truncate */
@@ -2361,6 +2549,16 @@ retry_lookup:
*/
audit_inode(pathname, path->dentry);
+ /*
+ * If atomic_open() acquired write access it is dropped now due to
+ * possible mount and symlink following (this might be optimized away if
+ * necessary...)
+ */
+ if (want_write) {
+ mnt_drop_write(nd->path.mnt);
+ want_write = 0;
+ }
+
error = -EEXIST;
if (open_flag & O_EXCL)
goto exit_dput;
@@ -2444,6 +2642,7 @@ common:
retried = true;
goto retry_lookup;
}
+opened:
if (!IS_ERR(filp)) {
error = ima_file_check(filp, op->acc_mode);
if (error) {
diff --git a/fs/open.c b/fs/open.c
index 1540632d838..13bece4f36a 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -810,6 +810,48 @@ out_err:
}
EXPORT_SYMBOL_GPL(lookup_instantiate_filp);
+/**
+ * finish_open - finish opening a file
+ * @od: opaque open data
+ * @dentry: pointer to dentry
+ * @open: open callback
+ *
+ * This can be used to finish opening a file passed to i_op->atomic_open().
+ *
+ * If the open callback is set to NULL, then the standard f_op->open()
+ * filesystem callback is substituted.
+ */
+struct file *finish_open(struct opendata *od, struct dentry *dentry,
+ int (*open)(struct inode *, struct file *))
+{
+ struct file *res;
+
+ mntget(od->mnt);
+ dget(dentry);
+
+ res = do_dentry_open(dentry, od->mnt, *od->filp, open, current_cred());
+ if (!IS_ERR(res))
+ *od->filp = NULL;
+
+ return res;
+}
+EXPORT_SYMBOL(finish_open);
+
+/**
+ * finish_no_open - finish ->atomic_open() without opening the file
+ *
+ * @od: opaque open data
+ * @dentry: dentry or NULL (as returned from ->lookup())
+ *
+ * This can be used to set the result of a successful lookup in ->atomic_open().
+ * The filesystem's atomic_open() method shall return NULL after calling this.
+ */
+void finish_no_open(struct opendata *od, struct dentry *dentry)
+{
+ od->dentry = dentry;
+}
+EXPORT_SYMBOL(finish_no_open);
+
/**
* nameidata_to_filp - convert a nameidata to an open filp.
* @nd: pointer to nameidata
diff --git a/include/linux/fs.h b/include/linux/fs.h
index f06db6bd5a7..0314635cf83 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -427,6 +427,7 @@ struct kstatfs;
struct vm_area_struct;
struct vfsmount;
struct cred;
+struct opendata;
extern void __init inode_init(void);
extern void __init inode_init_early(void);
@@ -1693,6 +1694,9 @@ struct inode_operations {
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
u64 len);
int (*update_time)(struct inode *, struct timespec *, int);
+ struct file * (*atomic_open)(struct inode *, struct dentry *,
+ struct opendata *, unsigned open_flag,
+ umode_t create_mode, bool *created);
} ____cacheline_aligned;
struct seq_file;
@@ -2061,6 +2065,9 @@ extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
const struct cred *);
extern int filp_close(struct file *, fl_owner_t id);
extern char * getname(const char __user *);
+extern struct file *finish_open(struct opendata *od, struct dentry *dentry,
+ int (*open)(struct inode *, struct file *));
+extern void finish_no_open(struct opendata *od, struct dentry *dentry);
/* fs/ioctl.c */
--
cgit v1.2.3-70-g09d2
From 0dd2b474d0b69d58859399b1df7fdc699ea005d4 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:18 +0200
Subject: nfs: implement i_op->atomic_open()
Replace NFS4 specific ->lookup implementation with ->atomic_open impelementation
and use the generic nfs_lookup for other lookups.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/dir.c | 183 +++++++++++++++++++++++++++++++----------------------------
1 file changed, 97 insertions(+), 86 deletions(-)
(limited to 'fs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index f430057ff3b..0d8c71271d1 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -111,11 +111,15 @@ const struct inode_operations nfs3_dir_inode_operations = {
#ifdef CONFIG_NFS_V4
-static struct dentry *nfs_atomic_lookup(struct inode *, struct dentry *, struct nameidata *);
-static int nfs_open_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd);
+static struct file *nfs_atomic_open(struct inode *, struct dentry *,
+ struct opendata *, unsigned, umode_t,
+ bool *);
+static int nfs4_create(struct inode *dir, struct dentry *dentry,
+ umode_t mode, struct nameidata *nd);
const struct inode_operations nfs4_dir_inode_operations = {
- .create = nfs_open_create,
- .lookup = nfs_atomic_lookup,
+ .create = nfs4_create,
+ .lookup = nfs_lookup,
+ .atomic_open = nfs_atomic_open,
.link = nfs_link,
.unlink = nfs_unlink,
.symlink = nfs_symlink,
@@ -1403,120 +1407,132 @@ static int do_open(struct inode *inode, struct file *filp)
return 0;
}
-static int nfs_intent_set_file(struct nameidata *nd, struct nfs_open_context *ctx)
+static struct file *nfs_finish_open(struct nfs_open_context *ctx,
+ struct dentry *dentry,
+ struct opendata *od, unsigned open_flags)
{
struct file *filp;
- int ret = 0;
+ int err;
+
+ if (ctx->dentry != dentry) {
+ dput(ctx->dentry);
+ ctx->dentry = dget(dentry);
+ }
/* If the open_intent is for execute, we have an extra check to make */
if (ctx->mode & FMODE_EXEC) {
- ret = nfs_may_open(ctx->dentry->d_inode,
- ctx->cred,
- nd->intent.open.flags);
- if (ret < 0)
+ err = nfs_may_open(dentry->d_inode, ctx->cred, open_flags);
+ if (err < 0) {
+ filp = ERR_PTR(err);
goto out;
+ }
}
- filp = lookup_instantiate_filp(nd, ctx->dentry, do_open);
- if (IS_ERR(filp))
- ret = PTR_ERR(filp);
- else
+
+ filp = finish_open(od, dentry, do_open);
+ if (!IS_ERR(filp))
nfs_file_set_open_context(filp, ctx);
+
out:
put_nfs_open_context(ctx);
- return ret;
+ return filp;
}
-static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned open_flags,
+ umode_t mode, bool *created)
{
struct nfs_open_context *ctx;
- struct iattr attr;
- struct dentry *res = NULL;
+ struct dentry *res;
+ struct iattr attr = { .ia_valid = ATTR_OPEN };
struct inode *inode;
- int open_flags;
+ struct file *filp;
int err;
- dfprintk(VFS, "NFS: atomic_lookup(%s/%ld), %s\n",
+ /* Expect a negative dentry */
+ BUG_ON(dentry->d_inode);
+
+ dfprintk(VFS, "NFS: atomic_open(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
- /* Check that we are indeed trying to open this file */
- if (!is_atomic_open(nd))
+ /* NFS only supports OPEN on regular files */
+ if ((open_flags & O_DIRECTORY)) {
+ err = -ENOENT;
+ if (!d_unhashed(dentry)) {
+ /*
+ * Hashed negative dentry with O_DIRECTORY: dentry was
+ * revalidated and is fine, no need to perform lookup
+ * again
+ */
+ goto out_err;
+ }
goto no_open;
-
- if (dentry->d_name.len > NFS_SERVER(dir)->namelen) {
- res = ERR_PTR(-ENAMETOOLONG);
- goto out;
}
- /* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash
- * the dentry. */
- if (nd->flags & LOOKUP_EXCL) {
- d_instantiate(dentry, NULL);
- goto out;
- }
-
- open_flags = nd->intent.open.flags;
- attr.ia_valid = ATTR_OPEN;
-
- ctx = create_nfs_open_context(dentry, open_flags);
- res = ERR_CAST(ctx);
- if (IS_ERR(ctx))
- goto out;
+ err = -ENAMETOOLONG;
+ if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
+ goto out_err;
- if (nd->flags & LOOKUP_CREATE) {
- attr.ia_mode = nd->intent.open.create_mode;
+ if (open_flags & O_CREAT) {
attr.ia_valid |= ATTR_MODE;
- attr.ia_mode &= ~current_umask();
- } else
- open_flags &= ~(O_EXCL | O_CREAT);
-
+ attr.ia_mode = mode & ~current_umask();
+ }
if (open_flags & O_TRUNC) {
attr.ia_valid |= ATTR_SIZE;
attr.ia_size = 0;
}
- /* Open the file on the server */
+ ctx = create_nfs_open_context(dentry, open_flags);
+ err = PTR_ERR(ctx);
+ if (IS_ERR(ctx))
+ goto out_err;
+
nfs_block_sillyrename(dentry->d_parent);
inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
+ d_drop(dentry);
if (IS_ERR(inode)) {
nfs_unblock_sillyrename(dentry->d_parent);
put_nfs_open_context(ctx);
- switch (PTR_ERR(inode)) {
- /* Make a negative dentry */
- case -ENOENT:
- d_add(dentry, NULL);
- res = NULL;
- goto out;
- /* This turned out not to be a regular file */
- case -EISDIR:
- case -ENOTDIR:
+ err = PTR_ERR(inode);
+ switch (err) {
+ case -ENOENT:
+ d_add(dentry, NULL);
+ break;
+ case -EISDIR:
+ case -ENOTDIR:
+ goto no_open;
+ case -ELOOP:
+ if (!(open_flags & O_NOFOLLOW))
goto no_open;
- case -ELOOP:
- if (!(nd->intent.open.flags & O_NOFOLLOW))
- goto no_open;
+ break;
/* case -EINVAL: */
- default:
- res = ERR_CAST(inode);
- goto out;
+ default:
+ break;
}
+ goto out_err;
}
res = d_add_unique(dentry, inode);
- nfs_unblock_sillyrename(dentry->d_parent);
- if (res != NULL) {
- dput(ctx->dentry);
- ctx->dentry = dget(res);
+ if (res != NULL)
dentry = res;
- }
- err = nfs_intent_set_file(nd, ctx);
- if (err < 0) {
- if (res != NULL)
- dput(res);
- return ERR_PTR(err);
- }
-out:
+
+ nfs_unblock_sillyrename(dentry->d_parent);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- return res;
+
+ filp = nfs_finish_open(ctx, dentry, od, open_flags);
+
+ dput(res);
+ return filp;
+
+out_err:
+ return ERR_PTR(err);
+
no_open:
- return nfs_lookup(dir, dentry, nd);
+ res = nfs_lookup(dir, dentry, NULL);
+ err = PTR_ERR(res);
+ if (IS_ERR(res))
+ goto out_err;
+
+ finish_no_open(od, res);
+ return NULL;
}
static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
@@ -1566,8 +1582,8 @@ no_open:
return nfs_lookup_revalidate(dentry, nd);
}
-static int nfs_open_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+static int nfs4_create(struct inode *dir, struct dentry *dentry,
+ umode_t mode, struct nameidata *nd)
{
struct nfs_open_context *ctx = NULL;
struct iattr attr;
@@ -1591,19 +1607,14 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry,
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, ctx);
if (error != 0)
goto out_put_ctx;
- if (nd) {
- error = nfs_intent_set_file(nd, ctx);
- if (error < 0)
- goto out_err;
- } else {
- put_nfs_open_context(ctx);
- }
+
+ put_nfs_open_context(ctx);
+
return 0;
out_put_ctx:
put_nfs_open_context(ctx);
out_err_drop:
d_drop(dentry);
-out_err:
return error;
}
--
cgit v1.2.3-70-g09d2
From 8867fe5899010a0c0ac36dadfdacf1072b1c990c Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:19 +0200
Subject: nfs: clean up ->create in nfs_rpc_ops
Don't pass nfs_open_context() to ->create(). Only the NFS4 implementation
needed that and only because it wanted to return an open file using open
intents. That task has been replaced by ->atomic_open so it is not necessary
anymore to pass the context to the create rpc operation.
Despite nfs4_proc_create apparently being okay with a NULL context it Oopses
somewhere down the call chain. So allocate a context here.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/dir.c | 42 ++----------------------------------------
fs/nfs/nfs3proc.c | 2 +-
fs/nfs/nfs4proc.c | 37 ++++++++++---------------------------
fs/nfs/proc.c | 2 +-
include/linux/nfs_xdr.h | 2 +-
5 files changed, 15 insertions(+), 70 deletions(-)
(limited to 'fs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 0d8c71271d1..45015d32a86 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -114,10 +114,8 @@ const struct inode_operations nfs3_dir_inode_operations = {
static struct file *nfs_atomic_open(struct inode *, struct dentry *,
struct opendata *, unsigned, umode_t,
bool *);
-static int nfs4_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd);
const struct inode_operations nfs4_dir_inode_operations = {
- .create = nfs4_create,
+ .create = nfs_create,
.lookup = nfs_lookup,
.atomic_open = nfs_atomic_open,
.link = nfs_link,
@@ -1582,42 +1580,6 @@ no_open:
return nfs_lookup_revalidate(dentry, nd);
}
-static int nfs4_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
-{
- struct nfs_open_context *ctx = NULL;
- struct iattr attr;
- int error;
- int open_flags = O_CREAT|O_EXCL;
-
- dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
- dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
-
- attr.ia_mode = mode;
- attr.ia_valid = ATTR_MODE;
-
- if (nd)
- open_flags = nd->intent.open.flags;
-
- ctx = create_nfs_open_context(dentry, open_flags);
- error = PTR_ERR(ctx);
- if (IS_ERR(ctx))
- goto out_err_drop;
-
- error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, ctx);
- if (error != 0)
- goto out_put_ctx;
-
- put_nfs_open_context(ctx);
-
- return 0;
-out_put_ctx:
- put_nfs_open_context(ctx);
-out_err_drop:
- d_drop(dentry);
- return error;
-}
-
#endif /* CONFIG_NFSV4 */
/*
@@ -1684,7 +1646,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry,
if (nd)
open_flags = nd->intent.open.flags;
- error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, NULL);
+ error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);
if (error != 0)
goto out_err;
return 0;
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 2292a0fd2bf..3187e24e8f7 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -314,7 +314,7 @@ static void nfs3_free_createdata(struct nfs3_createdata *data)
*/
static int
nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
- int flags, struct nfs_open_context *ctx)
+ int flags)
{
struct nfs3_createdata *data;
umode_t mode = sattr->ia_mode;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 15fc7e4664e..c157b2089b4 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2806,37 +2806,22 @@ static int nfs4_proc_readlink(struct inode *inode, struct page *page,
}
/*
- * Got race?
- * We will need to arrange for the VFS layer to provide an atomic open.
- * Until then, this create/open method is prone to inefficiency and race
- * conditions due to the lookup, create, and open VFS calls from sys_open()
- * placed on the wire.
- *
- * Given the above sorry state of affairs, I'm simply sending an OPEN.
- * The file will be opened again in the subsequent VFS open call
- * (nfs4_proc_file_open).
- *
- * The open for read will just hang around to be used by any process that
- * opens the file O_RDONLY. This will all be resolved with the VFS changes.
+ * This is just for mknod. open(O_CREAT) will always do ->open_context().
*/
-
static int
nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
- int flags, struct nfs_open_context *ctx)
+ int flags)
{
- struct dentry *de = dentry;
+ struct nfs_open_context *ctx;
struct nfs4_state *state;
- struct rpc_cred *cred = NULL;
- fmode_t fmode = 0;
int status = 0;
- if (ctx != NULL) {
- cred = ctx->cred;
- de = ctx->dentry;
- fmode = ctx->mode;
- }
+ ctx = alloc_nfs_open_context(dentry, FMODE_READ);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
sattr->ia_mode &= ~current_umask();
- state = nfs4_do_open(dir, de, fmode, flags, sattr, cred, NULL);
+ state = nfs4_do_open(dir, dentry, ctx->mode, flags, sattr, ctx->cred, NULL);
d_drop(dentry);
if (IS_ERR(state)) {
status = PTR_ERR(state);
@@ -2844,11 +2829,9 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
}
d_add(dentry, igrab(state->inode));
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- if (ctx != NULL)
- ctx->state = state;
- else
- nfs4_close_sync(state, fmode);
+ ctx->state = state;
out:
+ put_nfs_open_context(ctx);
return status;
}
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 617c7419a08..4433806e116 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -259,7 +259,7 @@ static void nfs_free_createdata(const struct nfs_createdata *data)
static int
nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
- int flags, struct nfs_open_context *ctx)
+ int flags)
{
struct nfs_createdata *data;
struct rpc_message msg = {
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 8aadd90b808..d3b7c18b18f 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1374,7 +1374,7 @@ struct nfs_rpc_ops {
int (*readlink)(struct inode *, struct page *, unsigned int,
unsigned int);
int (*create) (struct inode *, struct dentry *,
- struct iattr *, int, struct nfs_open_context *);
+ struct iattr *, int);
int (*remove) (struct inode *, struct qstr *);
void (*unlink_setup) (struct rpc_message *, struct inode *dir);
void (*unlink_rpc_prepare) (struct rpc_task *, struct nfs_unlinkdata *);
--
cgit v1.2.3-70-g09d2
From 50de348c3604f7684a89ce64180666d4dd74623f Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:20 +0200
Subject: nfs: don't use nd->intent.open.flags
Instead check LOOKUP_EXCL in nd->flags, which is basically what the open intent
flags were used for.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/dir.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
(limited to 'fs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 45015d32a86..0432f474771 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1538,7 +1538,7 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
struct dentry *parent = NULL;
struct inode *inode;
struct inode *dir;
- int openflags, ret = 0;
+ int ret = 0;
if (nd->flags & LOOKUP_RCU)
return -ECHILD;
@@ -1562,9 +1562,8 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
/* NFS only supports OPEN on regular files */
if (!S_ISREG(inode->i_mode))
goto no_open_dput;
- openflags = nd->intent.open.flags;
/* We cannot do exclusive creation on a positive dentry */
- if ((openflags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL))
+ if (nd && nd->flags & LOOKUP_EXCL)
goto no_open_dput;
/* Let f_op->open() actually open (and revalidate) the file */
@@ -1643,8 +1642,8 @@ static int nfs_create(struct inode *dir, struct dentry *dentry,
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- if (nd)
- open_flags = nd->intent.open.flags;
+ if (nd && !(nd->flags & LOOKUP_EXCL))
+ open_flags = O_CREAT;
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);
if (error != 0)
--
cgit v1.2.3-70-g09d2
From eda72afb9ef9f45941fb09260c0f268ff81ec40d Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:21 +0200
Subject: nfs: don't use intents for checking atomic open
is_atomic_open() is now only used by nfs4_lookup_revalidate() to check whether
it's okay to skip normal revalidation.
It does a racy check for mount read-onlyness and falls back to normal
revalidation if the open would fail. This makes little sense now that this
function isn't used for determining whether to actually open the file or not.
The d_mountpoint() check still makes sense since it is an indication that we
might be following a mount and so open may not revalidate the dentry.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/dir.c | 24 ++++--------------------
1 file changed, 4 insertions(+), 20 deletions(-)
(limited to 'fs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 0432f474771..e6d55dc93ff 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1366,24 +1366,6 @@ const struct dentry_operations nfs4_dentry_operations = {
.d_release = nfs_d_release,
};
-/*
- * Use intent information to determine whether we need to substitute
- * the NFSv4-style stateful OPEN for the LOOKUP call
- */
-static int is_atomic_open(struct nameidata *nd)
-{
- if (nd == NULL || nfs_lookup_check_intent(nd, LOOKUP_OPEN) == 0)
- return 0;
- /* NFS does not (yet) have a stateful open for directories */
- if (nd->flags & LOOKUP_DIRECTORY)
- return 0;
- /* Are we trying to write to a read only partition? */
- if (__mnt_is_readonly(nd->path.mnt) &&
- (nd->intent.open.flags & (O_CREAT|O_TRUNC|O_ACCMODE)))
- return 0;
- return 1;
-}
-
static fmode_t flags_to_mode(int flags)
{
fmode_t res = (__force fmode_t)flags & FMODE_EXEC;
@@ -1543,10 +1525,12 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
if (nd->flags & LOOKUP_RCU)
return -ECHILD;
- inode = dentry->d_inode;
- if (!is_atomic_open(nd) || d_mountpoint(dentry))
+ if (!(nd->flags & LOOKUP_OPEN) || (nd->flags & LOOKUP_DIRECTORY))
+ goto no_open;
+ if (d_mountpoint(dentry))
goto no_open;
+ inode = dentry->d_inode;
parent = dget_parent(dentry);
dir = parent->d_inode;
--
cgit v1.2.3-70-g09d2
From c8ccbe032feb127a977c66865cb63d72d9a6e08b Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:22 +0200
Subject: fuse: implement i_op->atomic_open()
Add an ->atomic_open implementation which replaces the atomic open+create
operation implemented via ->create. No functionality is changed.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/fuse/dir.c | 94 ++++++++++++++++++++++++++++++++++++++++++-----------------
1 file changed, 67 insertions(+), 27 deletions(-)
(limited to 'fs')
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index f7543f72897..e42442f1da1 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -369,8 +369,9 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
* If the filesystem doesn't support this, then fall back to separate
* 'mknod' + 'open' requests.
*/
-static int fuse_create_open(struct inode *dir, struct dentry *entry,
- umode_t mode, struct nameidata *nd)
+static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
+ struct opendata *od, unsigned flags,
+ umode_t mode)
{
int err;
struct inode *inode;
@@ -382,14 +383,11 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
struct fuse_entry_out outentry;
struct fuse_file *ff;
struct file *file;
- int flags = nd->intent.open.flags;
-
- if (fc->no_create)
- return -ENOSYS;
forget = fuse_alloc_forget();
+ err = -ENOMEM;
if (!forget)
- return -ENOMEM;
+ goto out_err;
req = fuse_get_req(fc);
err = PTR_ERR(req);
@@ -428,11 +426,8 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
req->out.args[1].value = &outopen;
fuse_request_send(fc, req);
err = req->out.h.error;
- if (err) {
- if (err == -ENOSYS)
- fc->no_create = 1;
+ if (err)
goto out_free_ff;
- }
err = -EIO;
if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
@@ -448,28 +443,78 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
fuse_sync_release(ff, flags);
fuse_queue_forget(fc, forget, outentry.nodeid, 1);
- return -ENOMEM;
+ err = -ENOMEM;
+ goto out_err;
}
kfree(forget);
d_instantiate(entry, inode);
fuse_change_entry_timeout(entry, &outentry);
fuse_invalidate_attr(dir);
- file = lookup_instantiate_filp(nd, entry, generic_file_open);
+ file = finish_open(od, entry, generic_file_open);
if (IS_ERR(file)) {
fuse_sync_release(ff, flags);
- return PTR_ERR(file);
+ } else {
+ file->private_data = fuse_file_get(ff);
+ fuse_finish_open(inode, file);
}
- file->private_data = fuse_file_get(ff);
- fuse_finish_open(inode, file);
- return 0;
+ return file;
- out_free_ff:
+out_free_ff:
fuse_file_free(ff);
- out_put_request:
+out_put_request:
fuse_put_request(fc, req);
- out_put_forget_req:
+out_put_forget_req:
kfree(forget);
- return err;
+out_err:
+ return ERR_PTR(err);
+}
+
+static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
+static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
+ struct opendata *od, unsigned flags,
+ umode_t mode, bool *created)
+{
+ int err;
+ struct fuse_conn *fc = get_fuse_conn(dir);
+ struct file *file;
+ struct dentry *res = NULL;
+
+ if (d_unhashed(entry)) {
+ res = fuse_lookup(dir, entry, NULL);
+ if (IS_ERR(res))
+ return ERR_CAST(res);
+
+ if (res)
+ entry = res;
+ }
+
+ if (!(flags & O_CREAT) || entry->d_inode)
+ goto no_open;
+
+ /* Only creates */
+ *created = true;
+
+ if (fc->no_create)
+ goto mknod;
+
+ file = fuse_create_open(dir, entry, od, flags, mode);
+ if (PTR_ERR(file) == -ENOSYS) {
+ fc->no_create = 1;
+ goto mknod;
+ }
+out_dput:
+ dput(res);
+ return file;
+
+mknod:
+ err = fuse_mknod(dir, entry, mode, 0);
+ if (err) {
+ file = ERR_PTR(err);
+ goto out_dput;
+ }
+no_open:
+ finish_no_open(od, res);
+ return NULL;
}
/*
@@ -573,12 +618,6 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode,
static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode,
struct nameidata *nd)
{
- if (nd) {
- int err = fuse_create_open(dir, entry, mode, nd);
- if (err != -ENOSYS)
- return err;
- /* Fall back on mknod */
- }
return fuse_mknod(dir, entry, mode, 0);
}
@@ -1646,6 +1685,7 @@ static const struct inode_operations fuse_dir_inode_operations = {
.link = fuse_link,
.setattr = fuse_setattr,
.create = fuse_create,
+ .atomic_open = fuse_atomic_open,
.mknod = fuse_mknod,
.permission = fuse_permission,
.getattr = fuse_getattr,
--
cgit v1.2.3-70-g09d2
From d2c127197dfc0b2bae62a52e1e0d3e3ff493919e Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:23 +0200
Subject: cifs: implement i_op->atomic_open()
Add an ->atomic_open implementation which replaces the atomic lookup+open+create
operation implemented via ->lookup and ->create operations.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Steve French <sfrench@samba.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/cifs/cifsfs.c | 1 +
fs/cifs/cifsfs.h | 3 +
fs/cifs/dir.c | 441 ++++++++++++++++++++++++++++++-------------------------
3 files changed, 247 insertions(+), 198 deletions(-)
(limited to 'fs')
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index bcab12c8714..c0c2751a757 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -777,6 +777,7 @@ struct file_system_type cifs_fs_type = {
};
const struct inode_operations cifs_dir_inode_ops = {
.create = cifs_create,
+ .atomic_open = cifs_atomic_open,
.lookup = cifs_lookup,
.getattr = cifs_getattr,
.unlink = cifs_unlink,
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 65365358c97..3a572bf5947 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -46,6 +46,9 @@ extern const struct inode_operations cifs_dir_inode_ops;
extern struct inode *cifs_root_iget(struct super_block *);
extern int cifs_create(struct inode *, struct dentry *, umode_t,
struct nameidata *);
+extern struct file *cifs_atomic_open(struct inode *, struct dentry *,
+ struct opendata *, unsigned, umode_t,
+ bool *);
extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
struct nameidata *);
extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index ec4e9a2a12f..7a3dcd15d68 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -133,108 +133,141 @@ cifs_bp_rename_retry:
return full_path;
}
+/*
+ * Don't allow the separator character in a path component.
+ * The VFS will not allow "/", but "\" is allowed by posix.
+ */
+static int
+check_name(struct dentry *direntry)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+ int i;
+
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
+ for (i = 0; i < direntry->d_name.len; i++) {
+ if (direntry->d_name.name[i] == '\\') {
+ cFYI(1, "Invalid file name");
+ return -EINVAL;
+ }
+ }
+ }
+ return 0;
+}
+
+
/* Inode operations in similar order to how they appear in Linux file fs.h */
-int
-cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
- struct nameidata *nd)
+static int cifs_do_create(struct inode *inode, struct dentry *direntry,
+ int xid, struct tcon_link *tlink, unsigned oflags,
+ umode_t mode, __u32 *oplock, __u16 *fileHandle,
+ bool *created)
{
int rc = -ENOENT;
- int xid;
int create_options = CREATE_NOT_DIR;
- __u32 oplock = 0;
- int oflags;
- /*
- * BB below access is probably too much for mknod to request
- * but we have to do query and setpathinfo so requesting
- * less could fail (unless we want to request getatr and setatr
- * permissions (only). At least for POSIX we do not have to
- * request so much.
- */
- int desiredAccess = GENERIC_READ | GENERIC_WRITE;
- __u16 fileHandle;
- struct cifs_sb_info *cifs_sb;
- struct tcon_link *tlink;
- struct cifs_tcon *tcon;
+ int desiredAccess;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifs_tcon *tcon = tlink_tcon(tlink);
char *full_path = NULL;
FILE_ALL_INFO *buf = NULL;
struct inode *newinode = NULL;
- int disposition = FILE_OVERWRITE_IF;
-
- xid = GetXid();
-
- cifs_sb = CIFS_SB(inode->i_sb);
- tlink = cifs_sb_tlink(cifs_sb);
- if (IS_ERR(tlink)) {
- FreeXid(xid);
- return PTR_ERR(tlink);
- }
- tcon = tlink_tcon(tlink);
+ int disposition;
+ *oplock = 0;
if (tcon->ses->server->oplocks)
- oplock = REQ_OPLOCK;
-
- if (nd)
- oflags = nd->intent.open.file->f_flags;
- else
- oflags = O_RDONLY | O_CREAT;
+ *oplock = REQ_OPLOCK;
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
rc = -ENOMEM;
- goto cifs_create_out;
+ goto out;
}
if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) &&
+ !tcon->broken_posix_open &&
(CIFS_UNIX_POSIX_PATH_OPS_CAP &
le64_to_cpu(tcon->fsUnixInfo.Capability))) {
rc = cifs_posix_open(full_path, &newinode,
- inode->i_sb, mode, oflags, &oplock, &fileHandle, xid);
- /* EIO could indicate that (posix open) operation is not
- supported, despite what server claimed in capability
- negotiation. EREMOTE indicates DFS junction, which is not
- handled in posix open */
-
- if (rc == 0) {
- if (newinode == NULL) /* query inode info */
+ inode->i_sb, mode, oflags, oplock, fileHandle, xid);
+ switch (rc) {
+ case 0:
+ if (newinode == NULL) {
+ /* query inode info */
goto cifs_create_get_file_info;
- else /* success, no need to query */
- goto cifs_create_set_dentry;
- } else if ((rc != -EIO) && (rc != -EREMOTE) &&
- (rc != -EOPNOTSUPP) && (rc != -EINVAL))
- goto cifs_create_out;
- /* else fallthrough to retry, using older open call, this is
- case where server does not support this SMB level, and
- falsely claims capability (also get here for DFS case
- which should be rare for path not covered on files) */
- }
+ }
- if (nd) {
- /* if the file is going to stay open, then we
- need to set the desired access properly */
- desiredAccess = 0;
- if (OPEN_FMODE(oflags) & FMODE_READ)
- desiredAccess |= GENERIC_READ; /* is this too little? */
- if (OPEN_FMODE(oflags) & FMODE_WRITE)
- desiredAccess |= GENERIC_WRITE;
-
- if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
- disposition = FILE_CREATE;
- else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
- disposition = FILE_OVERWRITE_IF;
- else if ((oflags & O_CREAT) == O_CREAT)
- disposition = FILE_OPEN_IF;
- else
- cFYI(1, "Create flag not set in create function");
+ if (!S_ISREG(newinode->i_mode)) {
+ /*
+ * The server may allow us to open things like
+ * FIFOs, but the client isn't set up to deal
+ * with that. If it's not a regular file, just
+ * close it and proceed as if it were a normal
+ * lookup.
+ */
+ CIFSSMBClose(xid, tcon, *fileHandle);
+ goto cifs_create_get_file_info;
+ }
+ /* success, no need to query */
+ goto cifs_create_set_dentry;
+
+ case -ENOENT:
+ goto cifs_create_get_file_info;
+
+ case -EIO:
+ case -EINVAL:
+ /*
+ * EIO could indicate that (posix open) operation is not
+ * supported, despite what server claimed in capability
+ * negotiation.
+ *
+ * POSIX open in samba versions 3.3.1 and earlier could
+ * incorrectly fail with invalid parameter.
+ */
+ tcon->broken_posix_open = true;
+ break;
+
+ case -EREMOTE:
+ case -EOPNOTSUPP:
+ /*
+ * EREMOTE indicates DFS junction, which is not handled
+ * in posix open. If either that or op not supported
+ * returned, follow the normal lookup.
+ */
+ break;
+
+ default:
+ goto out;
+ }
+ /*
+ * fallthrough to retry, using older open call, this is case
+ * where server does not support this SMB level, and falsely
+ * claims capability (also get here for DFS case which should be
+ * rare for path not covered on files)
+ */
}
+ desiredAccess = 0;
+ if (OPEN_FMODE(oflags) & FMODE_READ)
+ desiredAccess |= GENERIC_READ; /* is this too little? */
+ if (OPEN_FMODE(oflags) & FMODE_WRITE)
+ desiredAccess |= GENERIC_WRITE;
+
+ disposition = FILE_OVERWRITE_IF;
+ if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+ disposition = FILE_CREATE;
+ else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
+ disposition = FILE_OVERWRITE_IF;
+ else if ((oflags & O_CREAT) == O_CREAT)
+ disposition = FILE_OPEN_IF;
+ else
+ cFYI(1, "Create flag not set in create function");
+
/* BB add processing to set equivalent of mode - e.g. via CreateX with
ACLs */
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL) {
rc = -ENOMEM;
- goto cifs_create_out;
+ goto out;
}
/*
@@ -250,7 +283,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
if (tcon->ses->capabilities & CAP_NT_SMBS)
rc = CIFSSMBOpen(xid, tcon, full_path, disposition,
desiredAccess, create_options,
- &fileHandle, &oplock, buf, cifs_sb->local_nls,
+ fileHandle, oplock, buf, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
else
rc = -EIO; /* no NT SMB support fall into legacy open below */
@@ -259,17 +292,17 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
/* old server, retry the open legacy style */
rc = SMBLegacyOpen(xid, tcon, full_path, disposition,
desiredAccess, create_options,
- &fileHandle, &oplock, buf, cifs_sb->local_nls,
+ fileHandle, oplock, buf, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
}
if (rc) {
cFYI(1, "cifs_create returned 0x%x", rc);
- goto cifs_create_out;
+ goto out;
}
/* If Open reported that we actually created a file
then we now have to set the mode if possible */
- if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) {
+ if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) {
struct cifs_unix_set_info_args args = {
.mode = mode,
.ctime = NO_CHANGE_64,
@@ -278,6 +311,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
.device = 0,
};
+ *created = true;
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
args.uid = (__u64) current_fsuid();
if (inode->i_mode & S_ISGID)
@@ -288,7 +322,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
args.uid = NO_CHANGE_64;
args.gid = NO_CHANGE_64;
}
- CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle,
+ CIFSSMBUnixSetFileInfo(xid, tcon, &args, *fileHandle,
current->tgid);
} else {
/* BB implement mode setting via Windows security
@@ -305,11 +339,11 @@ cifs_create_get_file_info:
inode->i_sb, xid);
else {
rc = cifs_get_inode_info(&newinode, full_path, buf,
- inode->i_sb, xid, &fileHandle);
+ inode->i_sb, xid, fileHandle);
if (newinode) {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
newinode->i_mode = mode;
- if ((oplock & CIFS_CREATE_ACTION) &&
+ if ((*oplock & CIFS_CREATE_ACTION) &&
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
newinode->i_uid = current_fsuid();
if (inode->i_mode & S_ISGID)
@@ -321,37 +355,139 @@ cifs_create_get_file_info:
}
cifs_create_set_dentry:
- if (rc == 0)
- d_instantiate(direntry, newinode);
- else
+ if (rc != 0) {
cFYI(1, "Create worked, get_inode_info failed rc = %d", rc);
+ goto out;
+ }
+ d_drop(direntry);
+ d_add(direntry, newinode);
- if (newinode && nd) {
- struct cifsFileInfo *pfile_info;
- struct file *filp;
+ /* ENOENT for create? How weird... */
+ rc = -ENOENT;
+ if (!newinode) {
+ CIFSSMBClose(xid, tcon, *fileHandle);
+ goto out;
+ }
+ rc = 0;
- filp = lookup_instantiate_filp(nd, direntry, generic_file_open);
- if (IS_ERR(filp)) {
- rc = PTR_ERR(filp);
- CIFSSMBClose(xid, tcon, fileHandle);
- goto cifs_create_out;
- }
+out:
+ kfree(buf);
+ kfree(full_path);
+ return rc;
+}
- pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock);
- if (pfile_info == NULL) {
- fput(filp);
- CIFSSMBClose(xid, tcon, fileHandle);
- rc = -ENOMEM;
- }
- } else {
+struct file *
+cifs_atomic_open(struct inode *inode, struct dentry *direntry,
+ struct opendata *od, unsigned oflags, umode_t mode,
+ bool *created)
+{
+ int rc;
+ int xid;
+ struct tcon_link *tlink;
+ struct cifs_tcon *tcon;
+ __u16 fileHandle;
+ __u32 oplock;
+ struct file *filp;
+ struct cifsFileInfo *pfile_info;
+
+ /* Posix open is only called (at lookup time) for file create now. For
+ * opens (rather than creates), because we do not know if it is a file
+ * or directory yet, and current Samba no longer allows us to do posix
+ * open on dirs, we could end up wasting an open call on what turns out
+ * to be a dir. For file opens, we wait to call posix open till
+ * cifs_open. It could be added to atomic_open in the future but the
+ * performance tradeoff of the extra network request when EISDIR or
+ * EACCES is returned would have to be weighed against the 50% reduction
+ * in network traffic in the other paths.
+ */
+ if (!(oflags & O_CREAT)) {
+ struct dentry *res = cifs_lookup(inode, direntry, NULL);
+ if (IS_ERR(res))
+ return ERR_CAST(res);
+
+ finish_no_open(od, res);
+ return NULL;
+ }
+
+ rc = check_name(direntry);
+ if (rc)
+ return ERR_PTR(rc);
+
+ xid = GetXid();
+
+ cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p",
+ inode, direntry->d_name.name, direntry);
+
+ tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
+ filp = ERR_CAST(tlink);
+ if (IS_ERR(tlink))
+ goto free_xid;
+
+ tcon = tlink_tcon(tlink);
+
+ rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
+ &oplock, &fileHandle, created);
+
+ if (rc) {
+ filp = ERR_PTR(rc);
+ goto out;
+ }
+
+ filp = finish_open(od, direntry, generic_file_open);
+ if (IS_ERR(filp)) {
CIFSSMBClose(xid, tcon, fileHandle);
+ goto out;
}
-cifs_create_out:
- kfree(buf);
- kfree(full_path);
+ pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock);
+ if (pfile_info == NULL) {
+ CIFSSMBClose(xid, tcon, fileHandle);
+ fput(filp);
+ filp = ERR_PTR(-ENOMEM);
+ }
+
+out:
+ cifs_put_tlink(tlink);
+free_xid:
+ FreeXid(xid);
+ return filp;
+}
+
+int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
+ struct nameidata *nd)
+{
+ int rc;
+ int xid = GetXid();
+ /*
+ * BB below access is probably too much for mknod to request
+ * but we have to do query and setpathinfo so requesting
+ * less could fail (unless we want to request getatr and setatr
+ * permissions (only). At least for POSIX we do not have to
+ * request so much.
+ */
+ unsigned oflags = O_EXCL | O_CREAT | O_RDWR;
+ struct tcon_link *tlink;
+ __u16 fileHandle;
+ __u32 oplock;
+ bool created = true;
+
+ cFYI(1, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p",
+ inode, direntry->d_name.name, direntry);
+
+ tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
+ rc = PTR_ERR(tlink);
+ if (IS_ERR(tlink))
+ goto free_xid;
+
+ rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
+ &oplock, &fileHandle, &created);
+ if (!rc)
+ CIFSSMBClose(xid, tlink_tcon(tlink), fileHandle);
+
cifs_put_tlink(tlink);
+free_xid:
FreeXid(xid);
+
return rc;
}
@@ -492,16 +628,11 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
{
int xid;
int rc = 0; /* to get around spurious gcc warning, set to zero here */
- __u32 oplock;
- __u16 fileHandle = 0;
- bool posix_open = false;
struct cifs_sb_info *cifs_sb;
struct tcon_link *tlink;
struct cifs_tcon *pTcon;
- struct cifsFileInfo *cfile;
struct inode *newInode = NULL;
char *full_path = NULL;
- struct file *filp;
xid = GetXid();
@@ -518,31 +649,9 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
}
pTcon = tlink_tcon(tlink);
- oplock = pTcon->ses->server->oplocks ? REQ_OPLOCK : 0;
-
- /*
- * Don't allow the separator character in a path component.
- * The VFS will not allow "/", but "\" is allowed by posix.
- */
- if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
- int i;
- for (i = 0; i < direntry->d_name.len; i++)
- if (direntry->d_name.name[i] == '\\') {
- cFYI(1, "Invalid file name");
- rc = -EINVAL;
- goto lookup_out;
- }
- }
-
- /*
- * O_EXCL: optimize away the lookup, but don't hash the dentry. Let
- * the VFS handle the create.
- */
- if (nd && (nd->flags & LOOKUP_EXCL)) {
- d_instantiate(direntry, NULL);
- rc = 0;
+ rc = check_name(direntry);
+ if (rc)
goto lookup_out;
- }
/* can not grab the rename sem here since it would
deadlock in the cases (beginning of sys_rename itself)
@@ -560,80 +669,16 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
}
cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode);
- /* Posix open is only called (at lookup time) for file create now.
- * For opens (rather than creates), because we do not know if it
- * is a file or directory yet, and current Samba no longer allows
- * us to do posix open on dirs, we could end up wasting an open call
- * on what turns out to be a dir. For file opens, we wait to call posix
- * open till cifs_open. It could be added here (lookup) in the future
- * but the performance tradeoff of the extra network request when EISDIR
- * or EACCES is returned would have to be weighed against the 50%
- * reduction in network traffic in the other paths.
- */
if (pTcon->unix_ext) {
- if (nd && !(nd->flags & LOOKUP_DIRECTORY) &&
- (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open &&
- (nd->intent.open.file->f_flags & O_CREAT)) {
- rc = cifs_posix_open(full_path, &newInode,
- parent_dir_inode->i_sb,
- nd->intent.open.create_mode,
- nd->intent.open.file->f_flags, &oplock,
- &fileHandle, xid);
- /*
- * The check below works around a bug in POSIX
- * open in samba versions 3.3.1 and earlier where
- * open could incorrectly fail with invalid parameter.
- * If either that or op not supported returned, follow
- * the normal lookup.
- */
- switch (rc) {
- case 0:
- /*
- * The server may allow us to open things like
- * FIFOs, but the client isn't set up to deal
- * with that. If it's not a regular file, just
- * close it and proceed as if it were a normal
- * lookup.
- */
- if (newInode && !S_ISREG(newInode->i_mode)) {
- CIFSSMBClose(xid, pTcon, fileHandle);
- break;
- }
- case -ENOENT:
- posix_open = true;
- case -EOPNOTSUPP:
- break;
- default:
- pTcon->broken_posix_open = true;
- }
- }
- if (!posix_open)
- rc = cifs_get_inode_info_unix(&newInode, full_path,
- parent_dir_inode->i_sb, xid);
- } else
+ rc = cifs_get_inode_info_unix(&newInode, full_path,
+ parent_dir_inode->i_sb, xid);
+ } else {
rc = cifs_get_inode_info(&newInode, full_path, NULL,
parent_dir_inode->i_sb, xid, NULL);
+ }
if ((rc == 0) && (newInode != NULL)) {
d_add(direntry, newInode);
- if (posix_open) {
- filp = lookup_instantiate_filp(nd, direntry,
- generic_file_open);
- if (IS_ERR(filp)) {
- rc = PTR_ERR(filp);
- CIFSSMBClose(xid, pTcon, fileHandle);
- goto lookup_out;
- }
-
- cfile = cifs_new_fileinfo(fileHandle, filp, tlink,
- oplock);
- if (cfile == NULL) {
- fput(filp);
- CIFSSMBClose(xid, pTcon, fileHandle);
- rc = -ENOMEM;
- goto lookup_out;
- }
- }
/* since paths are not looked up by component - the parent
directories are presumed to be good here */
renew_parental_timestamps(direntry);
--
cgit v1.2.3-70-g09d2
From 3819219b592159725069eb16a7a46f58e4ecef32 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:24 +0200
Subject: ceph: remove unused arg from ceph_lookup_open()
What was the purpose of this?
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/ceph/dir.c | 4 ++--
fs/ceph/file.c | 3 +--
fs/ceph/super.h | 3 +--
3 files changed, 4 insertions(+), 6 deletions(-)
(limited to 'fs')
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 3e8094be460..c4b7832c38b 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -599,7 +599,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
(nd->flags & LOOKUP_OPEN) &&
!(nd->intent.open.flags & O_CREAT)) {
int mode = nd->intent.open.create_mode & ~current->fs->umask;
- return ceph_lookup_open(dir, dentry, nd, mode, 1);
+ return ceph_lookup_open(dir, dentry, nd, mode);
}
/* can we conclude ENOENT locally? */
@@ -710,7 +710,7 @@ static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode,
if (nd) {
BUG_ON((nd->flags & LOOKUP_OPEN) == 0);
- dentry = ceph_lookup_open(dir, dentry, nd, mode, 0);
+ dentry = ceph_lookup_open(dir, dentry, nd, mode);
/* hrm, what should i do here if we get aliased? */
if (IS_ERR(dentry))
return PTR_ERR(dentry);
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 988d4f302e4..4bf9773e6a3 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -219,8 +219,7 @@ out:
* path_lookup_create -> LOOKUP_OPEN|LOOKUP_CREATE
*/
struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd, int mode,
- int locked_dir)
+ struct nameidata *nd, int mode)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index fc35036d258..8471db98b62 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -807,8 +807,7 @@ extern int ceph_copy_from_page_vector(struct page **pages,
extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
extern int ceph_open(struct inode *inode, struct file *file);
extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd, int mode,
- int locked_dir);
+ struct nameidata *nd, int mode);
extern int ceph_release(struct inode *inode, struct file *filp);
/* dir.c */
--
cgit v1.2.3-70-g09d2
From 2d83bde9a16e18eafdc73a3a1f4a8eb110e49672 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:25 +0200
Subject: ceph: implement i_op->atomic_open()
Add an ->atomic_open implementation which replaces the atomic lookup+open+create
operation implemented via ->lookup and ->create operations.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/ceph/dir.c | 68 ++++++++++++++++++++++++++++++++++++---------------------
fs/ceph/file.c | 21 +++++++++---------
fs/ceph/super.h | 5 +++--
3 files changed, 56 insertions(+), 38 deletions(-)
(limited to 'fs')
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index c4b7832c38b..75df600ec9b 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -594,14 +594,6 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
if (err < 0)
return ERR_PTR(err);
- /* open (but not create!) intent? */
- if (nd &&
- (nd->flags & LOOKUP_OPEN) &&
- !(nd->intent.open.flags & O_CREAT)) {
- int mode = nd->intent.open.create_mode & ~current->fs->umask;
- return ceph_lookup_open(dir, dentry, nd, mode);
- }
-
/* can we conclude ENOENT locally? */
if (dentry->d_inode == NULL) {
struct ceph_inode_info *ci = ceph_inode(dir);
@@ -642,6 +634,47 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
return dentry;
}
+struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags, umode_t mode,
+ bool *created)
+{
+ int err;
+ struct dentry *res = NULL;
+ struct file *filp;
+
+ if (!(flags & O_CREAT)) {
+ if (dentry->d_name.len > NAME_MAX)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ err = ceph_init_dentry(dentry);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ return ceph_lookup_open(dir, dentry, od, flags, mode);
+ }
+
+ if (d_unhashed(dentry)) {
+ res = ceph_lookup(dir, dentry, NULL);
+ if (IS_ERR(res))
+ return ERR_CAST(res);
+
+ if (res)
+ dentry = res;
+ }
+
+ /* We don't deal with positive dentries here */
+ if (dentry->d_inode) {
+ finish_no_open(od, res);
+ return NULL;
+ }
+
+ *created = true;
+ filp = ceph_lookup_open(dir, dentry, od, flags, mode);
+ dput(res);
+
+ return filp;
+}
+
/*
* If we do a create but get no trace back from the MDS, follow up with
* a lookup (the VFS expects us to link up the provided dentry).
@@ -702,23 +735,7 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry,
static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode,
struct nameidata *nd)
{
- dout("create in dir %p dentry %p name '%.*s'\n",
- dir, dentry, dentry->d_name.len, dentry->d_name.name);
-
- if (ceph_snap(dir) != CEPH_NOSNAP)
- return -EROFS;
-
- if (nd) {
- BUG_ON((nd->flags & LOOKUP_OPEN) == 0);
- dentry = ceph_lookup_open(dir, dentry, nd, mode);
- /* hrm, what should i do here if we get aliased? */
- if (IS_ERR(dentry))
- return PTR_ERR(dentry);
- return 0;
- }
-
- /* fall back to mknod */
- return ceph_mknod(dir, dentry, (mode & ~S_IFMT) | S_IFREG, 0);
+ return ceph_mknod(dir, dentry, mode, 0);
}
static int ceph_symlink(struct inode *dir, struct dentry *dentry,
@@ -1357,6 +1374,7 @@ const struct inode_operations ceph_dir_iops = {
.rmdir = ceph_unlink,
.rename = ceph_rename,
.create = ceph_create,
+ .atomic_open = ceph_atomic_open,
};
const struct dentry_operations ceph_dentry_ops = {
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4bf9773e6a3..e34dc22e75a 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -213,21 +213,15 @@ out:
* may_open() fails, the struct *file gets cleaned up (i.e.
* ceph_release gets called). So fear not!
*/
-/*
- * flags
- * path_lookup_open -> LOOKUP_OPEN
- * path_lookup_create -> LOOKUP_OPEN|LOOKUP_CREATE
- */
-struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd, int mode)
+struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags, umode_t mode)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
- struct file *file;
+ struct file *file = NULL;
struct ceph_mds_request *req;
struct dentry *ret;
int err;
- int flags = nd->intent.open.flags;
dout("ceph_lookup_open dentry %p '%.*s' flags %d mode 0%o\n",
dentry, dentry->d_name.len, dentry->d_name.name, flags, mode);
@@ -253,14 +247,19 @@ struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
err = ceph_handle_notrace_create(dir, dentry);
if (err)
goto out;
- file = lookup_instantiate_filp(nd, req->r_dentry, ceph_open);
+ file = finish_open(od, req->r_dentry, ceph_open);
if (IS_ERR(file))
err = PTR_ERR(file);
out:
ret = ceph_finish_lookup(req, dentry, err);
ceph_mdsc_put_request(req);
dout("ceph_lookup_open result=%p\n", ret);
- return ret;
+
+ if (IS_ERR(ret))
+ return ERR_CAST(ret);
+
+ dput(ret);
+ return err ? ERR_PTR(err) : file;
}
int ceph_release(struct inode *inode, struct file *file)
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 8471db98b62..e61e54673e5 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -806,8 +806,9 @@ extern int ceph_copy_from_page_vector(struct page **pages,
loff_t off, size_t len);
extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
extern int ceph_open(struct inode *inode, struct file *file);
-extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd, int mode);
+extern struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags,
+ umode_t mode);
extern int ceph_release(struct inode *inode, struct file *filp);
/* dir.c */
--
cgit v1.2.3-70-g09d2
From e43ae79c540270865918dab5ac914c74f43101e2 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:26 +0200
Subject: 9p: implement i_op->atomic_open()
Add an ->atomic_open implementation which replaces the atomic open+create
operation implemented via ->create. No functionality is changed.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/9p/vfs_inode.c | 169 +++++++++++++++++++++++++++++--------------------
fs/9p/vfs_inode_dotl.c | 52 ++++++++++-----
2 files changed, 137 insertions(+), 84 deletions(-)
(limited to 'fs')
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 57ccb7537da..e8c42ceb89b 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -712,11 +712,14 @@ error:
}
/**
- * v9fs_vfs_create - VFS hook to create files
+ * v9fs_vfs_create - VFS hook to create a regular file
+ *
+ * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called
+ * for mknod(2).
+ *
* @dir: directory inode that is being created
* @dentry: dentry that is being deleted
* @mode: create permissions
- * @nd: path information
*
*/
@@ -724,76 +727,19 @@ static int
v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
struct nameidata *nd)
{
- int err;
- u32 perm;
- int flags;
- struct file *filp;
- struct v9fs_inode *v9inode;
- struct v9fs_session_info *v9ses;
- struct p9_fid *fid, *inode_fid;
-
- err = 0;
- fid = NULL;
- v9ses = v9fs_inode2v9ses(dir);
- perm = unixmode2p9mode(v9ses, mode);
- if (nd)
- flags = nd->intent.open.flags;
- else
- flags = O_RDWR;
+ struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
+ u32 perm = unixmode2p9mode(v9ses, mode);
+ struct p9_fid *fid;
- fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
- v9fs_uflags2omode(flags,
- v9fs_proto_dotu(v9ses)));
- if (IS_ERR(fid)) {
- err = PTR_ERR(fid);
- fid = NULL;
- goto error;
- }
+ /* P9_OEXCL? */
+ fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR);
+ if (IS_ERR(fid))
+ return PTR_ERR(fid);
v9fs_invalidate_inode_attr(dir);
- /* if we are opening a file, assign the open fid to the file */
- if (nd) {
- v9inode = V9FS_I(dentry->d_inode);
- mutex_lock(&v9inode->v_mutex);
- if (v9ses->cache && !v9inode->writeback_fid &&
- ((flags & O_ACCMODE) != O_RDONLY)) {
- /*
- * clone a fid and add it to writeback_fid
- * we do it during open time instead of
- * page dirty time via write_begin/page_mkwrite
- * because we want write after unlink usecase
- * to work.
- */
- inode_fid = v9fs_writeback_fid(dentry);
- if (IS_ERR(inode_fid)) {
- err = PTR_ERR(inode_fid);
- mutex_unlock(&v9inode->v_mutex);
- goto error;
- }
- v9inode->writeback_fid = (void *) inode_fid;
- }
- mutex_unlock(&v9inode->v_mutex);
- filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
- if (IS_ERR(filp)) {
- err = PTR_ERR(filp);
- goto error;
- }
-
- filp->private_data = fid;
-#ifdef CONFIG_9P_FSCACHE
- if (v9ses->cache)
- v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
-#endif
- } else
- p9_client_clunk(fid);
+ p9_client_clunk(fid);
return 0;
-
-error:
- if (fid)
- p9_client_clunk(fid);
-
- return err;
}
/**
@@ -910,6 +856,93 @@ error:
return ERR_PTR(result);
}
+static struct file *
+v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags, umode_t mode,
+ bool *created)
+{
+ int err;
+ u32 perm;
+ struct file *filp;
+ struct v9fs_inode *v9inode;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid, *inode_fid;
+ struct dentry *res = NULL;
+
+ if (d_unhashed(dentry)) {
+ res = v9fs_vfs_lookup(dir, dentry, NULL);
+ if (IS_ERR(res))
+ return ERR_CAST(res);
+
+ if (res)
+ dentry = res;
+ }
+
+ /* Only creates */
+ if (!(flags & O_CREAT) || dentry->d_inode) {
+ finish_no_open(od, res);
+ return NULL;
+ }
+
+ err = 0;
+ fid = NULL;
+ v9ses = v9fs_inode2v9ses(dir);
+ perm = unixmode2p9mode(v9ses, mode);
+ fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
+ v9fs_uflags2omode(flags,
+ v9fs_proto_dotu(v9ses)));
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
+ goto error;
+ }
+
+ v9fs_invalidate_inode_attr(dir);
+ v9inode = V9FS_I(dentry->d_inode);
+ mutex_lock(&v9inode->v_mutex);
+ if (v9ses->cache && !v9inode->writeback_fid &&
+ ((flags & O_ACCMODE) != O_RDONLY)) {
+ /*
+ * clone a fid and add it to writeback_fid
+ * we do it during open time instead of
+ * page dirty time via write_begin/page_mkwrite
+ * because we want write after unlink usecase
+ * to work.
+ */
+ inode_fid = v9fs_writeback_fid(dentry);
+ if (IS_ERR(inode_fid)) {
+ err = PTR_ERR(inode_fid);
+ mutex_unlock(&v9inode->v_mutex);
+ goto error;
+ }
+ v9inode->writeback_fid = (void *) inode_fid;
+ }
+ mutex_unlock(&v9inode->v_mutex);
+ filp = finish_open(od, dentry, generic_file_open);
+ if (IS_ERR(filp)) {
+ err = PTR_ERR(filp);
+ goto error;
+ }
+
+ filp->private_data = fid;
+#ifdef CONFIG_9P_FSCACHE
+ if (v9ses->cache)
+ v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
+#endif
+
+ *created = true;
+out:
+ dput(res);
+ return filp;
+
+error:
+ if (fid)
+ p9_client_clunk(fid);
+
+ filp = ERR_PTR(err);
+ goto out;
+}
+
/**
* v9fs_vfs_unlink - VFS unlink hook to delete an inode
* @i: inode that is being unlinked
@@ -1488,6 +1521,7 @@ out:
static const struct inode_operations v9fs_dir_inode_operations_dotu = {
.create = v9fs_vfs_create,
.lookup = v9fs_vfs_lookup,
+ .atomic_open = v9fs_vfs_atomic_open,
.symlink = v9fs_vfs_symlink,
.link = v9fs_vfs_link,
.unlink = v9fs_vfs_unlink,
@@ -1502,6 +1536,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
static const struct inode_operations v9fs_dir_inode_operations = {
.create = v9fs_vfs_create,
.lookup = v9fs_vfs_lookup,
+ .atomic_open = v9fs_vfs_atomic_open,
.unlink = v9fs_vfs_unlink,
.mkdir = v9fs_vfs_mkdir,
.rmdir = v9fs_vfs_rmdir,
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index e3dd2a1e2bf..a354fe2cb23 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -230,17 +230,23 @@ int v9fs_open_to_dotl_flags(int flags)
* @dir: directory inode that is being created
* @dentry: dentry that is being deleted
* @mode: create permissions
- * @nd: path information
*
*/
static int
v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
struct nameidata *nd)
+{
+ return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
+}
+
+static struct file *
+v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags, umode_t omode,
+ bool *created)
{
int err = 0;
gid_t gid;
- int flags;
umode_t mode;
char *name = NULL;
struct file *filp;
@@ -251,19 +257,25 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
struct p9_fid *dfid, *ofid, *inode_fid;
struct v9fs_session_info *v9ses;
struct posix_acl *pacl = NULL, *dacl = NULL;
+ struct dentry *res = NULL;
- v9ses = v9fs_inode2v9ses(dir);
- if (nd)
- flags = nd->intent.open.flags;
- else {
- /*
- * create call without LOOKUP_OPEN is due
- * to mknod of regular files. So use mknod
- * operation.
- */
- return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
+ if (d_unhashed(dentry)) {
+ res = v9fs_vfs_lookup(dir, dentry, NULL);
+ if (IS_ERR(res))
+ return ERR_CAST(res);
+
+ if (res)
+ dentry = res;
+ }
+
+ /* Only creates */
+ if (!(flags & O_CREAT) || dentry->d_inode) {
+ finish_no_open(od, res);
+ return NULL;
}
+ v9ses = v9fs_inode2v9ses(dir);
+
name = (char *) dentry->d_name.name;
p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
name, flags, omode);
@@ -272,7 +284,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
- return err;
+ goto err_return;
}
/* clone a fid to use for creation */
@@ -280,7 +292,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
- return err;
+ goto err_return;
}
gid = v9fs_get_fsgid_for_create(dir);
@@ -345,7 +357,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
}
mutex_unlock(&v9inode->v_mutex);
/* Since we are opening a file, assign the open fid to the file */
- filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
+ filp = finish_open(od, dentry, generic_file_open);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
goto err_clunk_old_fid;
@@ -355,7 +367,10 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
if (v9ses->cache)
v9fs_cache_inode_set_cookie(inode, filp);
#endif
- return 0;
+ *created = true;
+out:
+ dput(res);
+ return filp;
error:
if (fid)
@@ -364,7 +379,9 @@ err_clunk_old_fid:
if (ofid)
p9_client_clunk(ofid);
v9fs_set_create_acl(NULL, &dacl, &pacl);
- return err;
+err_return:
+ filp = ERR_PTR(err);
+ goto out;
}
/**
@@ -982,6 +999,7 @@ out:
const struct inode_operations v9fs_dir_inode_operations_dotl = {
.create = v9fs_vfs_create_dotl,
+ .atomic_open = v9fs_vfs_atomic_open_dotl,
.lookup = v9fs_vfs_lookup,
.link = v9fs_vfs_link_dotl,
.symlink = v9fs_vfs_symlink_dotl,
--
cgit v1.2.3-70-g09d2
From 015c3bbcd88df2305aae5b017a9c91c08b380aa1 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:27 +0200
Subject: vfs: remove open intents from nameidata
All users of open intents have been converted to use ->atomic_{open,create}.
This patch gets rid of nd->intent.open and related infrastructure.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/internal.h | 5 +--
fs/namei.c | 95 ++++++++++++++++++++++++---------------------------
fs/open.c | 87 ++--------------------------------------------
include/linux/namei.h | 14 --------
4 files changed, 48 insertions(+), 153 deletions(-)
(limited to 'fs')
diff --git a/fs/internal.h b/fs/internal.h
index 70067775df2..ae69a3b150d 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -82,13 +82,10 @@ extern struct super_block *user_get_super(dev_t);
/*
* open.c
*/
-struct nameidata;
-extern struct file *nameidata_to_filp(struct nameidata *);
-extern void release_open_intent(struct nameidata *);
struct opendata {
struct dentry *dentry;
struct vfsmount *mnt;
- struct file **filp;
+ struct file *filp;
};
struct open_flags {
int open_flag;
diff --git a/fs/namei.c b/fs/namei.c
index 9e11ae83bff..0ed876259f8 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -463,22 +463,6 @@ err_root:
return -ECHILD;
}
-/**
- * release_open_intent - free up open intent resources
- * @nd: pointer to nameidata
- */
-void release_open_intent(struct nameidata *nd)
-{
- struct file *file = nd->intent.open.file;
-
- if (file && !IS_ERR(file)) {
- if (file->f_path.dentry == NULL)
- put_filp(file);
- else
- fput(file);
- }
-}
-
static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
return dentry->d_op->d_revalidate(dentry, nd);
@@ -2210,7 +2194,8 @@ static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
}
static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
- struct path *path, const struct open_flags *op,
+ struct path *path, struct opendata *od,
+ const struct open_flags *op,
int *want_write, bool need_lookup,
bool *created)
{
@@ -2219,7 +2204,6 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
umode_t mode;
int error;
int acc_mode;
- struct opendata od;
struct file *filp;
int create_error = 0;
struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
@@ -2285,14 +2269,13 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (nd->flags & LOOKUP_DIRECTORY)
open_flag |= O_DIRECTORY;
- od.dentry = DENTRY_NOT_SET;
- od.mnt = nd->path.mnt;
- od.filp = &nd->intent.open.file;
- filp = dir->i_op->atomic_open(dir, dentry, &od, open_flag, mode,
+ od->dentry = DENTRY_NOT_SET;
+ od->mnt = nd->path.mnt;
+ filp = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
created);
if (IS_ERR(filp)) {
- if (WARN_ON(od.dentry != DENTRY_NOT_SET))
- dput(od.dentry);
+ if (WARN_ON(od->dentry != DENTRY_NOT_SET))
+ dput(od->dentry);
if (create_error && PTR_ERR(filp) == -ENOENT)
filp = ERR_PTR(create_error);
@@ -2306,13 +2289,13 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
}
if (!filp) {
- if (WARN_ON(od.dentry == DENTRY_NOT_SET)) {
+ if (WARN_ON(od->dentry == DENTRY_NOT_SET)) {
filp = ERR_PTR(-EIO);
goto out;
}
- if (od.dentry) {
+ if (od->dentry) {
dput(dentry);
- dentry = od.dentry;
+ dentry = od->dentry;
}
goto looked_up;
}
@@ -2375,6 +2358,7 @@ looked_up:
* was performed, only lookup.
*/
static struct file *lookup_open(struct nameidata *nd, struct path *path,
+ struct opendata *od,
const struct open_flags *op,
int *want_write, bool *created)
{
@@ -2394,7 +2378,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
goto out_no_open;
if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
- return atomic_open(nd, dentry, path, op, want_write,
+ return atomic_open(nd, dentry, path, od, op, want_write,
need_lookup, created);
}
@@ -2416,7 +2400,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
* rw->ro transition does not occur between
* the time when the file is created and when
* a permanent write count is taken through
- * the 'struct file' in nameidata_to_filp().
+ * the 'struct file' in finish_open().
*/
error = mnt_want_write(nd->path.mnt);
if (error)
@@ -2444,7 +2428,8 @@ out_dput:
* Handle the last step of open()
*/
static struct file *do_last(struct nameidata *nd, struct path *path,
- const struct open_flags *op, const char *pathname)
+ struct opendata *od, const struct open_flags *op,
+ const char *pathname)
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
@@ -2521,7 +2506,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
- filp = lookup_open(nd, path, op, &want_write, &created);
+ filp = lookup_open(nd, path, od, op, &want_write, &created);
mutex_unlock(&dir->d_inode->i_mutex);
if (filp) {
@@ -2627,7 +2612,8 @@ common:
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
goto exit;
- filp = nameidata_to_filp(nd);
+ od->mnt = nd->path.mnt;
+ filp = finish_open(od, nd->path.dentry, NULL);
if (filp == ERR_PTR(-EOPENSTALE) && save_parent.dentry && !retried) {
BUG_ON(save_parent.dentry != dir);
path_put(&nd->path);
@@ -2642,6 +2628,11 @@ common:
retried = true;
goto retry_lookup;
}
+ if (IS_ERR(filp))
+ goto out;
+ error = open_check_o_direct(filp);
+ if (error)
+ goto exit_fput;
opened:
if (!IS_ERR(filp)) {
error = ima_file_check(filp, op->acc_mode);
@@ -2671,24 +2662,26 @@ exit_dput:
exit:
filp = ERR_PTR(error);
goto out;
+exit_fput:
+ fput(filp);
+ goto exit;
+
}
static struct file *path_openat(int dfd, const char *pathname,
struct nameidata *nd, const struct open_flags *op, int flags)
{
struct file *base = NULL;
- struct file *filp;
+ struct opendata od;
+ struct file *res;
struct path path;
int error;
- filp = get_empty_filp();
- if (!filp)
+ od.filp = get_empty_filp();
+ if (!od.filp)
return ERR_PTR(-ENFILE);
- filp->f_flags = op->open_flag;
- nd->intent.open.file = filp;
- nd->intent.open.flags = open_to_namei_flags(op->open_flag);
- nd->intent.open.create_mode = op->mode;
+ od.filp->f_flags = op->open_flag;
error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
@@ -2699,14 +2692,14 @@ static struct file *path_openat(int dfd, const char *pathname,
if (unlikely(error))
goto out_filp;
- filp = do_last(nd, &path, op, pathname);
- while (unlikely(!filp)) { /* trailing symlink */
+ res = do_last(nd, &path, &od, op, pathname);
+ while (unlikely(!res)) { /* trailing symlink */
struct path link = path;
void *cookie;
if (!(nd->flags & LOOKUP_FOLLOW)) {
path_put_conditional(&path, nd);
path_put(&nd->path);
- filp = ERR_PTR(-ELOOP);
+ res = ERR_PTR(-ELOOP);
break;
}
nd->flags |= LOOKUP_PARENT;
@@ -2714,7 +2707,7 @@ static struct file *path_openat(int dfd, const char *pathname,
error = follow_link(&link, nd, &cookie);
if (unlikely(error))
goto out_filp;
- filp = do_last(nd, &path, op, pathname);
+ res = do_last(nd, &path, &od, op, pathname);
put_link(nd, &link, cookie);
}
out:
@@ -2722,17 +2715,20 @@ out:
path_put(&nd->root);
if (base)
fput(base);
- release_open_intent(nd);
- if (filp == ERR_PTR(-EOPENSTALE)) {
+ if (od.filp) {
+ BUG_ON(od.filp->f_path.dentry);
+ put_filp(od.filp);
+ }
+ if (res == ERR_PTR(-EOPENSTALE)) {
if (flags & LOOKUP_RCU)
- filp = ERR_PTR(-ECHILD);
+ res = ERR_PTR(-ECHILD);
else
- filp = ERR_PTR(-ESTALE);
+ res = ERR_PTR(-ESTALE);
}
- return filp;
+ return res;
out_filp:
- filp = ERR_PTR(error);
+ res = ERR_PTR(error);
goto out;
}
@@ -2788,7 +2784,6 @@ struct dentry *kern_path_create(int dfd, const char *pathname, struct path *path
goto out;
nd.flags &= ~LOOKUP_PARENT;
nd.flags |= LOOKUP_CREATE | LOOKUP_EXCL;
- nd.intent.open.flags = O_EXCL;
/*
* Do the final lookup.
diff --git a/fs/open.c b/fs/open.c
index 13bece4f36a..937f4ec2018 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -770,46 +770,6 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
return res;
}
-/**
- * lookup_instantiate_filp - instantiates the open intent filp
- * @nd: pointer to nameidata
- * @dentry: pointer to dentry
- * @open: open callback
- *
- * Helper for filesystems that want to use lookup open intents and pass back
- * a fully instantiated struct file to the caller.
- * This function is meant to be called from within a filesystem's
- * lookup method.
- * Beware of calling it for non-regular files! Those ->open methods might block
- * (e.g. in fifo_open), leaving you with parent locked (and in case of fifo,
- * leading to a deadlock, as nobody can open that fifo anymore, because
- * another process to open fifo will block on locked parent when doing lookup).
- * Note that in case of error, nd->intent.open.file is destroyed, but the
- * path information remains valid.
- * If the open callback is set to NULL, then the standard f_op->open()
- * filesystem callback is substituted.
- */
-struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
- int (*open)(struct inode *, struct file *))
-{
- const struct cred *cred = current_cred();
-
- if (IS_ERR(nd->intent.open.file))
- goto out;
- if (IS_ERR(dentry))
- goto out_err;
- nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->path.mnt),
- nd->intent.open.file,
- open, cred);
-out:
- return nd->intent.open.file;
-out_err:
- release_open_intent(nd);
- nd->intent.open.file = ERR_CAST(dentry);
- goto out;
-}
-EXPORT_SYMBOL_GPL(lookup_instantiate_filp);
-
/**
* finish_open - finish opening a file
* @od: opaque open data
@@ -829,9 +789,9 @@ struct file *finish_open(struct opendata *od, struct dentry *dentry,
mntget(od->mnt);
dget(dentry);
- res = do_dentry_open(dentry, od->mnt, *od->filp, open, current_cred());
+ res = do_dentry_open(dentry, od->mnt, od->filp, open, current_cred());
if (!IS_ERR(res))
- *od->filp = NULL;
+ od->filp = NULL;
return res;
}
@@ -852,49 +812,6 @@ void finish_no_open(struct opendata *od, struct dentry *dentry)
}
EXPORT_SYMBOL(finish_no_open);
-/**
- * nameidata_to_filp - convert a nameidata to an open filp.
- * @nd: pointer to nameidata
- * @flags: open flags
- *
- * Note that this function destroys the original nameidata
- */
-struct file *nameidata_to_filp(struct nameidata *nd)
-{
- const struct cred *cred = current_cred();
- struct file *filp;
-
- /* Pick up the filp from the open intent */
- filp = nd->intent.open.file;
-
- /* Has the filesystem initialised the file for us? */
- if (filp->f_path.dentry != NULL) {
- nd->intent.open.file = NULL;
- } else {
- struct file *res;
-
- path_get(&nd->path);
- res = do_dentry_open(nd->path.dentry, nd->path.mnt,
- filp, NULL, cred);
- if (!IS_ERR(res)) {
- int error;
-
- nd->intent.open.file = NULL;
- BUG_ON(res != filp);
-
- error = open_check_o_direct(filp);
- if (error) {
- fput(filp);
- filp = ERR_PTR(error);
- }
- } else {
- /* Allow nd->intent.open.file to be recycled */
- filp = res;
- }
- }
- return filp;
-}
-
/*
* dentry_open() will have done dput(dentry) and mntput(mnt) if it returns an
* error.
diff --git a/include/linux/namei.h b/include/linux/namei.h
index ffc02135c48..23d85987921 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -7,12 +7,6 @@
struct vfsmount;
-struct open_intent {
- int flags;
- int create_mode;
- struct file *file;
-};
-
enum { MAX_NESTED_LINKS = 8 };
struct nameidata {
@@ -25,11 +19,6 @@ struct nameidata {
int last_type;
unsigned depth;
char *saved_names[MAX_NESTED_LINKS + 1];
-
- /* Intent data */
- union {
- struct open_intent open;
- } intent;
};
/*
@@ -82,9 +71,6 @@ extern int kern_path_parent(const char *, struct nameidata *);
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
const char *, unsigned int, struct path *);
-extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
- int (*open)(struct inode *, struct file *));
-
extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
extern int follow_down_one(struct path *);
--
cgit v1.2.3-70-g09d2
From aa4caadb70b782999ce5d150ac2f4b1d18e2fc75 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:28 +0200
Subject: vfs: do_last(): clean up error handling
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 23 ++++++++---------------
1 file changed, 8 insertions(+), 15 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 0ed876259f8..044215a7bb0 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2634,21 +2634,14 @@ common:
if (error)
goto exit_fput;
opened:
- if (!IS_ERR(filp)) {
- error = ima_file_check(filp, op->acc_mode);
- if (error) {
- fput(filp);
- filp = ERR_PTR(error);
- }
- }
- if (!IS_ERR(filp)) {
- if (will_truncate) {
- error = handle_truncate(filp);
- if (error) {
- fput(filp);
- filp = ERR_PTR(error);
- }
- }
+ error = ima_file_check(filp, op->acc_mode);
+ if (error)
+ goto exit_fput;
+
+ if (will_truncate) {
+ error = handle_truncate(filp);
+ if (error)
+ goto exit_fput;
}
out:
if (want_write)
--
cgit v1.2.3-70-g09d2
From e83db167229702da0f48957641e0dbf36b2644aa Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:29 +0200
Subject: vfs: do_last(): clean up labels
Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 044215a7bb0..ea24376cfa9 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2463,13 +2463,13 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
error = -EISDIR;
goto exit;
}
- goto ok;
+ goto finish_open;
case LAST_BIND:
error = complete_walk(nd);
if (error)
return ERR_PTR(error);
audit_inode(pathname, dir);
- goto ok;
+ goto finish_open;
}
if (!(open_flag & O_CREAT)) {
@@ -2526,7 +2526,7 @@ retry_lookup:
will_truncate = 0;
acc_mode = MAY_OPEN;
path_to_nameidata(path, nd);
- goto common;
+ goto finish_open_created;
}
/*
@@ -2598,7 +2598,7 @@ finish_lookup:
if ((nd->flags & LOOKUP_DIRECTORY) && !nd->inode->i_op->lookup)
goto exit;
audit_inode(pathname, nd->path.dentry);
-ok:
+finish_open:
if (!S_ISREG(nd->inode->i_mode))
will_truncate = 0;
@@ -2608,7 +2608,7 @@ ok:
goto exit;
want_write = 1;
}
-common:
+finish_open_created:
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
goto exit;
--
cgit v1.2.3-70-g09d2
From 77d660a8a83036432dc33f092a367d06563d233e Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:30 +0200
Subject: vfs: do_last(): clean up bool
Consistently use bool for boolean values in do_last().
Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index ea24376cfa9..6bdb8d73253 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2196,7 +2196,7 @@ static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
struct path *path, struct opendata *od,
const struct open_flags *op,
- int *want_write, bool need_lookup,
+ bool *want_write, bool need_lookup,
bool *created)
{
struct inode *dir = nd->path.dentry->d_inode;
@@ -2238,7 +2238,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
(open_flag & O_ACCMODE) != O_RDONLY) {
error = mnt_want_write(nd->path.mnt);
if (!error) {
- *want_write = 1;
+ *want_write = true;
} else if (!(open_flag & O_CREAT)) {
/*
* No O_CREATE -> atomicity not a requirement -> fall
@@ -2360,7 +2360,7 @@ looked_up:
static struct file *lookup_open(struct nameidata *nd, struct path *path,
struct opendata *od,
const struct open_flags *op,
- int *want_write, bool *created)
+ bool *want_write, bool *created)
{
struct dentry *dir = nd->path.dentry;
struct inode *dir_inode = dir->d_inode;
@@ -2405,7 +2405,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
error = mnt_want_write(nd->path.mnt);
if (error)
goto out_dput;
- *want_write = 1;
+ *want_write = true;
*created = true;
error = security_path_mknod(&nd->path, dentry, mode, 0);
if (error)
@@ -2433,13 +2433,13 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
- int will_truncate = open_flag & O_TRUNC;
- int want_write = 0;
+ bool will_truncate = (open_flag & O_TRUNC) != 0;
+ bool want_write = false;
int acc_mode = op->acc_mode;
struct file *filp;
struct inode *inode;
bool created;
- int symlink_ok = 0;
+ bool symlink_ok = false;
struct path save_parent = { .dentry = NULL, .mnt = NULL };
bool retried = false;
int error;
@@ -2476,7 +2476,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
if (nd->last.name[nd->last.len])
nd->flags |= LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
if (open_flag & O_PATH && !(nd->flags & LOOKUP_FOLLOW))
- symlink_ok = 1;
+ symlink_ok = true;
/* we _can_ be in RCU mode here */
error = lookup_fast(nd, &nd->last, path, &inode);
if (likely(!error))
@@ -2514,7 +2514,7 @@ retry_lookup:
goto out;
if (created || !S_ISREG(filp->f_path.dentry->d_inode->i_mode))
- will_truncate = 0;
+ will_truncate = false;
audit_inode(pathname, filp->f_path.dentry);
goto opened;
@@ -2523,7 +2523,7 @@ retry_lookup:
if (created) {
/* Don't check for write permission, don't truncate */
open_flag &= ~O_TRUNC;
- will_truncate = 0;
+ will_truncate = false;
acc_mode = MAY_OPEN;
path_to_nameidata(path, nd);
goto finish_open_created;
@@ -2541,7 +2541,7 @@ retry_lookup:
*/
if (want_write) {
mnt_drop_write(nd->path.mnt);
- want_write = 0;
+ want_write = false;
}
error = -EEXIST;
@@ -2600,13 +2600,13 @@ finish_lookup:
audit_inode(pathname, nd->path.dentry);
finish_open:
if (!S_ISREG(nd->inode->i_mode))
- will_truncate = 0;
+ will_truncate = false;
if (will_truncate) {
error = mnt_want_write(nd->path.mnt);
if (error)
goto exit;
- want_write = 1;
+ want_write = true;
}
finish_open_created:
error = may_open(&nd->path, acc_mode, open_flag);
@@ -2623,7 +2623,7 @@ finish_open_created:
save_parent.dentry = NULL;
if (want_write) {
mnt_drop_write(nd->path.mnt);
- want_write = 0;
+ want_write = false;
}
retried = true;
goto retry_lookup;
--
cgit v1.2.3-70-g09d2
From f60dc3db6e24b7c36445cf1feb56b34c799074b3 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:31 +0200
Subject: vfs: do_last(): clean up retry
Move the lookup retry logic to the bottom of the function to make the normal
case simpler to read.
Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 36 +++++++++++++++++++++---------------
1 file changed, 21 insertions(+), 15 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 6bdb8d73253..183a769537f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2614,22 +2614,11 @@ finish_open_created:
goto exit;
od->mnt = nd->path.mnt;
filp = finish_open(od, nd->path.dentry, NULL);
- if (filp == ERR_PTR(-EOPENSTALE) && save_parent.dentry && !retried) {
- BUG_ON(save_parent.dentry != dir);
- path_put(&nd->path);
- nd->path = save_parent;
- nd->inode = dir->d_inode;
- save_parent.mnt = NULL;
- save_parent.dentry = NULL;
- if (want_write) {
- mnt_drop_write(nd->path.mnt);
- want_write = false;
- }
- retried = true;
- goto retry_lookup;
- }
- if (IS_ERR(filp))
+ if (IS_ERR(filp)) {
+ if (filp == ERR_PTR(-EOPENSTALE))
+ goto stale_open;
goto out;
+ }
error = open_check_o_direct(filp);
if (error)
goto exit_fput;
@@ -2659,6 +2648,23 @@ exit_fput:
fput(filp);
goto exit;
+stale_open:
+ /* If no saved parent or already retried then can't retry */
+ if (!save_parent.dentry || retried)
+ goto out;
+
+ BUG_ON(save_parent.dentry != dir);
+ path_put(&nd->path);
+ nd->path = save_parent;
+ nd->inode = dir->d_inode;
+ save_parent.mnt = NULL;
+ save_parent.dentry = NULL;
+ if (want_write) {
+ mnt_drop_write(nd->path.mnt);
+ want_write = false;
+ }
+ retried = true;
+ goto retry_lookup;
}
static struct file *path_openat(int dfd, const char *pathname,
--
cgit v1.2.3-70-g09d2
From a8277b9baa6268de386529a33061775bc716198b Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 15:10:32 +0200
Subject: vfs: move O_DIRECT check to common code
Perform open_check_o_direct() in a common place in do_last after opening the
file.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 17 +++++------------
1 file changed, 5 insertions(+), 12 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 183a769537f..4bc4bc6a693 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2305,22 +2305,15 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
* here.
*/
error = may_open(&filp->f_path, acc_mode, open_flag);
- if (error)
- goto out_fput;
-
- error = open_check_o_direct(filp);
- if (error)
- goto out_fput;
+ if (error) {
+ fput(filp);
+ filp = ERR_PTR(error);
+ }
out:
dput(dentry);
return filp;
-out_fput:
- fput(filp);
- filp = ERR_PTR(error);
- goto out;
-
no_open:
if (need_lookup) {
dentry = lookup_real(dir, dentry, nd);
@@ -2619,10 +2612,10 @@ finish_open_created:
goto stale_open;
goto out;
}
+opened:
error = open_check_o_direct(filp);
if (error)
goto exit_fput;
-opened:
error = ima_file_check(filp, op->acc_mode);
if (error)
goto exit_fput;
--
cgit v1.2.3-70-g09d2
From 47237687d73cbeae1dd7a133c3fc3d7239094568 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 05:01:45 -0400
Subject: ->atomic_open() prototype change - pass int * instead of bool *
... and let finish_open() report having opened the file via that sucker.
Next step: don't modify od->filp at all.
[AV: FILE_CREATE was already used by cifs; Miklos' fix folded]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/vfs.txt | 2 +-
fs/9p/vfs_inode.c | 6 +++---
fs/9p/vfs_inode_dotl.c | 6 +++---
fs/ceph/dir.c | 8 ++++----
fs/ceph/file.c | 5 +++--
fs/ceph/super.h | 2 +-
fs/cifs/cifsfs.h | 2 +-
fs/cifs/dir.c | 12 ++++++------
fs/fuse/dir.c | 10 +++++-----
fs/namei.c | 33 +++++++++++++++++----------------
fs/nfs/dir.c | 11 ++++++-----
fs/open.c | 7 +++++--
include/linux/fs.h | 9 +++++++--
14 files changed, 63 insertions(+), 52 deletions(-)
(limited to 'fs')
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 8157488c346..af4e45bd6cf 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -64,7 +64,7 @@ ata *);
void (*update_time)(struct inode *, struct timespec *, int);
struct file * (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
- umode_t create_mode, bool *created);
+ umode_t create_mode, int *opened);
locking rules:
all may block
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index beb6e691f70..d7121051afc 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -366,7 +366,7 @@ struct inode_operations {
void (*update_time)(struct inode *, struct timespec *, int);
struct file * (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
- umode_t create_mode, bool *created);
+ umode_t create_mode, int *opened);
};
Again, all methods are called without any locks being held, unless
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index e8c42ceb89b..de626b3b342 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -859,7 +859,7 @@ error:
static struct file *
v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t mode,
- bool *created)
+ int *opened)
{
int err;
u32 perm;
@@ -918,7 +918,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
v9inode->writeback_fid = (void *) inode_fid;
}
mutex_unlock(&v9inode->v_mutex);
- filp = finish_open(od, dentry, generic_file_open);
+ filp = finish_open(od, dentry, generic_file_open, opened);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
goto error;
@@ -930,7 +930,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
#endif
- *created = true;
+ *opened |= FILE_CREATED;
out:
dput(res);
return filp;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index a354fe2cb23..3db55471bc9 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -243,7 +243,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
static struct file *
v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t omode,
- bool *created)
+ int *opened)
{
int err = 0;
gid_t gid;
@@ -357,7 +357,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
}
mutex_unlock(&v9inode->v_mutex);
/* Since we are opening a file, assign the open fid to the file */
- filp = finish_open(od, dentry, generic_file_open);
+ filp = finish_open(od, dentry, generic_file_open, opened);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
goto err_clunk_old_fid;
@@ -367,7 +367,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
if (v9ses->cache)
v9fs_cache_inode_set_cookie(inode, filp);
#endif
- *created = true;
+ *opened |= FILE_CREATED;
out:
dput(res);
return filp;
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 75df600ec9b..81e5e908df9 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -636,7 +636,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t mode,
- bool *created)
+ int *opened)
{
int err;
struct dentry *res = NULL;
@@ -650,7 +650,7 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
if (err < 0)
return ERR_PTR(err);
- return ceph_lookup_open(dir, dentry, od, flags, mode);
+ return ceph_lookup_open(dir, dentry, od, flags, mode, opened);
}
if (d_unhashed(dentry)) {
@@ -668,8 +668,8 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
return NULL;
}
- *created = true;
- filp = ceph_lookup_open(dir, dentry, od, flags, mode);
+ *opened |= FILE_CREATED;
+ filp = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
dput(res);
return filp;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index e34dc22e75a..4c304a90d04 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -214,7 +214,8 @@ out:
* ceph_release gets called). So fear not!
*/
struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags, umode_t mode)
+ struct opendata *od, unsigned flags, umode_t mode,
+ int *opened)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -247,7 +248,7 @@ struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
err = ceph_handle_notrace_create(dir, dentry);
if (err)
goto out;
- file = finish_open(od, req->r_dentry, ceph_open);
+ file = finish_open(od, req->r_dentry, ceph_open, opened);
if (IS_ERR(file))
err = PTR_ERR(file);
out:
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index e61e54673e5..f9a325108b4 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -808,7 +808,7 @@ extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
extern int ceph_open(struct inode *inode, struct file *file);
extern struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags,
- umode_t mode);
+ umode_t mode, int *opened);
extern int ceph_release(struct inode *inode, struct file *filp);
/* dir.c */
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 3a572bf5947..92a7c3d8a03 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -48,7 +48,7 @@ extern int cifs_create(struct inode *, struct dentry *, umode_t,
struct nameidata *);
extern struct file *cifs_atomic_open(struct inode *, struct dentry *,
struct opendata *, unsigned, umode_t,
- bool *);
+ int *);
extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
struct nameidata *);
extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 7a3dcd15d68..6cdf23fd70e 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -160,7 +160,7 @@ check_name(struct dentry *direntry)
static int cifs_do_create(struct inode *inode, struct dentry *direntry,
int xid, struct tcon_link *tlink, unsigned oflags,
umode_t mode, __u32 *oplock, __u16 *fileHandle,
- bool *created)
+ int *created)
{
int rc = -ENOENT;
int create_options = CREATE_NOT_DIR;
@@ -311,7 +311,7 @@ static int cifs_do_create(struct inode *inode, struct dentry *direntry,
.device = 0,
};
- *created = true;
+ *created |= FILE_CREATED;
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
args.uid = (__u64) current_fsuid();
if (inode->i_mode & S_ISGID)
@@ -379,7 +379,7 @@ out:
struct file *
cifs_atomic_open(struct inode *inode, struct dentry *direntry,
struct opendata *od, unsigned oflags, umode_t mode,
- bool *created)
+ int *opened)
{
int rc;
int xid;
@@ -426,14 +426,14 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
tcon = tlink_tcon(tlink);
rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
- &oplock, &fileHandle, created);
+ &oplock, &fileHandle, opened);
if (rc) {
filp = ERR_PTR(rc);
goto out;
}
- filp = finish_open(od, direntry, generic_file_open);
+ filp = finish_open(od, direntry, generic_file_open, opened);
if (IS_ERR(filp)) {
CIFSSMBClose(xid, tcon, fileHandle);
goto out;
@@ -469,7 +469,7 @@ int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
struct tcon_link *tlink;
__u16 fileHandle;
__u32 oplock;
- bool created = true;
+ int created = FILE_CREATED;
cFYI(1, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p",
inode, direntry->d_name.name, direntry);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index e42442f1da1..345f78ee5c9 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -371,7 +371,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
*/
static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
struct opendata *od, unsigned flags,
- umode_t mode)
+ umode_t mode, int *opened)
{
int err;
struct inode *inode;
@@ -450,7 +450,7 @@ static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
d_instantiate(entry, inode);
fuse_change_entry_timeout(entry, &outentry);
fuse_invalidate_attr(dir);
- file = finish_open(od, entry, generic_file_open);
+ file = finish_open(od, entry, generic_file_open, opened);
if (IS_ERR(file)) {
fuse_sync_release(ff, flags);
} else {
@@ -472,7 +472,7 @@ out_err:
static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
struct opendata *od, unsigned flags,
- umode_t mode, bool *created)
+ umode_t mode, int *opened)
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
@@ -492,12 +492,12 @@ static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
goto no_open;
/* Only creates */
- *created = true;
+ *opened |= FILE_CREATED;
if (fc->no_create)
goto mknod;
- file = fuse_create_open(dir, entry, od, flags, mode);
+ file = fuse_create_open(dir, entry, od, flags, mode, opened);
if (PTR_ERR(file) == -ENOSYS) {
fc->no_create = 1;
goto mknod;
diff --git a/fs/namei.c b/fs/namei.c
index 4bc4bc6a693..7a33f074e5b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2197,7 +2197,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
struct path *path, struct opendata *od,
const struct open_flags *op,
bool *want_write, bool need_lookup,
- bool *created)
+ int *opened)
{
struct inode *dir = nd->path.dentry->d_inode;
unsigned open_flag = open_to_namei_flags(op->open_flag);
@@ -2222,7 +2222,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (open_flag & O_EXCL) {
open_flag &= ~O_TRUNC;
- *created = true;
+ *opened |= FILE_CREATED;
}
/*
@@ -2272,7 +2272,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
od->dentry = DENTRY_NOT_SET;
od->mnt = nd->path.mnt;
filp = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
- created);
+ opened);
if (IS_ERR(filp)) {
if (WARN_ON(od->dentry != DENTRY_NOT_SET))
dput(od->dentry);
@@ -2283,7 +2283,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
}
acc_mode = op->acc_mode;
- if (*created) {
+ if (*opened & FILE_CREATED) {
fsnotify_create(dir, dentry);
acc_mode = MAY_OPEN;
}
@@ -2353,7 +2353,7 @@ looked_up:
static struct file *lookup_open(struct nameidata *nd, struct path *path,
struct opendata *od,
const struct open_flags *op,
- bool *want_write, bool *created)
+ bool *want_write, int *opened)
{
struct dentry *dir = nd->path.dentry;
struct inode *dir_inode = dir->d_inode;
@@ -2361,7 +2361,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
int error;
bool need_lookup;
- *created = false;
+ *opened &= ~FILE_CREATED;
dentry = lookup_dcache(&nd->last, dir, nd, &need_lookup);
if (IS_ERR(dentry))
return ERR_CAST(dentry);
@@ -2372,7 +2372,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
return atomic_open(nd, dentry, path, od, op, want_write,
- need_lookup, created);
+ need_lookup, opened);
}
if (need_lookup) {
@@ -2399,7 +2399,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
if (error)
goto out_dput;
*want_write = true;
- *created = true;
+ *opened |= FILE_CREATED;
error = security_path_mknod(&nd->path, dentry, mode, 0);
if (error)
goto out_dput;
@@ -2422,7 +2422,7 @@ out_dput:
*/
static struct file *do_last(struct nameidata *nd, struct path *path,
struct opendata *od, const struct open_flags *op,
- const char *pathname)
+ int *opened, const char *pathname)
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
@@ -2431,7 +2431,6 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
int acc_mode = op->acc_mode;
struct file *filp;
struct inode *inode;
- bool created;
bool symlink_ok = false;
struct path save_parent = { .dentry = NULL, .mnt = NULL };
bool retried = false;
@@ -2499,21 +2498,22 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
- filp = lookup_open(nd, path, od, op, &want_write, &created);
+ filp = lookup_open(nd, path, od, op, &want_write, opened);
mutex_unlock(&dir->d_inode->i_mutex);
if (filp) {
if (IS_ERR(filp))
goto out;
- if (created || !S_ISREG(filp->f_path.dentry->d_inode->i_mode))
+ if ((*opened & FILE_CREATED) ||
+ !S_ISREG(filp->f_path.dentry->d_inode->i_mode))
will_truncate = false;
audit_inode(pathname, filp->f_path.dentry);
goto opened;
}
- if (created) {
+ if (*opened & FILE_CREATED) {
/* Don't check for write permission, don't truncate */
open_flag &= ~O_TRUNC;
will_truncate = false;
@@ -2606,7 +2606,7 @@ finish_open_created:
if (error)
goto exit;
od->mnt = nd->path.mnt;
- filp = finish_open(od, nd->path.dentry, NULL);
+ filp = finish_open(od, nd->path.dentry, NULL, opened);
if (IS_ERR(filp)) {
if (filp == ERR_PTR(-EOPENSTALE))
goto stale_open;
@@ -2667,6 +2667,7 @@ static struct file *path_openat(int dfd, const char *pathname,
struct opendata od;
struct file *res;
struct path path;
+ int opened = 0;
int error;
od.filp = get_empty_filp();
@@ -2684,7 +2685,7 @@ static struct file *path_openat(int dfd, const char *pathname,
if (unlikely(error))
goto out_filp;
- res = do_last(nd, &path, &od, op, pathname);
+ res = do_last(nd, &path, &od, op, &opened, pathname);
while (unlikely(!res)) { /* trailing symlink */
struct path link = path;
void *cookie;
@@ -2699,7 +2700,7 @@ static struct file *path_openat(int dfd, const char *pathname,
error = follow_link(&link, nd, &cookie);
if (unlikely(error))
goto out_filp;
- res = do_last(nd, &path, &od, op, pathname);
+ res = do_last(nd, &path, &od, op, &opened, pathname);
put_link(nd, &link, cookie);
}
out:
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e6d55dc93ff..6deb2549ead 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -113,7 +113,7 @@ const struct inode_operations nfs3_dir_inode_operations = {
static struct file *nfs_atomic_open(struct inode *, struct dentry *,
struct opendata *, unsigned, umode_t,
- bool *);
+ int *);
const struct inode_operations nfs4_dir_inode_operations = {
.create = nfs_create,
.lookup = nfs_lookup,
@@ -1389,7 +1389,8 @@ static int do_open(struct inode *inode, struct file *filp)
static struct file *nfs_finish_open(struct nfs_open_context *ctx,
struct dentry *dentry,
- struct opendata *od, unsigned open_flags)
+ struct opendata *od, unsigned open_flags,
+ int *opened)
{
struct file *filp;
int err;
@@ -1408,7 +1409,7 @@ static struct file *nfs_finish_open(struct nfs_open_context *ctx,
}
}
- filp = finish_open(od, dentry, do_open);
+ filp = finish_open(od, dentry, do_open, opened);
if (!IS_ERR(filp))
nfs_file_set_open_context(filp, ctx);
@@ -1419,7 +1420,7 @@ out:
static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned open_flags,
- umode_t mode, bool *created)
+ umode_t mode, int *opened)
{
struct nfs_open_context *ctx;
struct dentry *res;
@@ -1497,7 +1498,7 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
nfs_unblock_sillyrename(dentry->d_parent);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- filp = nfs_finish_open(ctx, dentry, od, open_flags);
+ filp = nfs_finish_open(ctx, dentry, od, open_flags, opened);
dput(res);
return filp;
diff --git a/fs/open.c b/fs/open.c
index 937f4ec2018..89589bd3993 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -782,7 +782,8 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
* filesystem callback is substituted.
*/
struct file *finish_open(struct opendata *od, struct dentry *dentry,
- int (*open)(struct inode *, struct file *))
+ int (*open)(struct inode *, struct file *),
+ int *opened)
{
struct file *res;
@@ -790,8 +791,10 @@ struct file *finish_open(struct opendata *od, struct dentry *dentry,
dget(dentry);
res = do_dentry_open(dentry, od->mnt, od->filp, open, current_cred());
- if (!IS_ERR(res))
+ if (!IS_ERR(res)) {
+ *opened |= FILE_OPENED;
od->filp = NULL;
+ }
return res;
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0314635cf83..a7618cf28d0 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1696,7 +1696,7 @@ struct inode_operations {
int (*update_time)(struct inode *, struct timespec *, int);
struct file * (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
- umode_t create_mode, bool *created);
+ umode_t create_mode, int *opened);
} ____cacheline_aligned;
struct seq_file;
@@ -2065,8 +2065,13 @@ extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
const struct cred *);
extern int filp_close(struct file *, fl_owner_t id);
extern char * getname(const char __user *);
+enum {
+ FILE_CREATED = 1,
+ FILE_OPENED = 2
+};
extern struct file *finish_open(struct opendata *od, struct dentry *dentry,
- int (*open)(struct inode *, struct file *));
+ int (*open)(struct inode *, struct file *),
+ int *opened);
extern void finish_no_open(struct opendata *od, struct dentry *dentry);
/* fs/ioctl.c */
--
cgit v1.2.3-70-g09d2
From 3d8a00d2099ebc6d5a6e95fadaf861709d9919a8 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 05:04:43 -0400
Subject: don't modify od->filp at all
make put_filp() conditional on flag set by finish_open()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 4 +---
fs/open.c | 5 ++---
2 files changed, 3 insertions(+), 6 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 7a33f074e5b..18b9326d951 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2708,10 +2708,8 @@ out:
path_put(&nd->root);
if (base)
fput(base);
- if (od.filp) {
- BUG_ON(od.filp->f_path.dentry);
+ if (!(opened & FILE_OPENED))
put_filp(od.filp);
- }
if (res == ERR_PTR(-EOPENSTALE)) {
if (flags & LOOKUP_RCU)
res = ERR_PTR(-ECHILD);
diff --git a/fs/open.c b/fs/open.c
index 89589bd3993..c87f98201c2 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -786,15 +786,14 @@ struct file *finish_open(struct opendata *od, struct dentry *dentry,
int *opened)
{
struct file *res;
+ BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
mntget(od->mnt);
dget(dentry);
res = do_dentry_open(dentry, od->mnt, od->filp, open, current_cred());
- if (!IS_ERR(res)) {
+ if (!IS_ERR(res))
*opened |= FILE_OPENED;
- od->filp = NULL;
- }
return res;
}
--
cgit v1.2.3-70-g09d2
From d95852777bc8ba6b3ad3397d495c5f9dd8ca8383 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 22 Jun 2012 12:39:14 +0400
Subject: make ->atomic_open() return int
Change of calling conventions:
old new
NULL 1
file 0
ERR_PTR(-ve) -ve
Caller *knows* that struct file *; no need to return it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/vfs.txt | 6 ++---
fs/9p/vfs_inode.c | 10 +++----
fs/9p/vfs_inode_dotl.c | 14 +++++-----
fs/ceph/dir.c | 19 +++++++------
fs/ceph/file.c | 12 ++++-----
fs/ceph/super.h | 6 ++---
fs/cifs/cifsfs.h | 6 ++---
fs/cifs/dir.c | 17 ++++++------
fs/fuse/dir.c | 33 +++++++++++------------
fs/namei.c | 14 +++++-----
fs/nfs/dir.c | 57 +++++++++++++++++++--------------------
include/linux/fs.h | 6 ++---
13 files changed, 97 insertions(+), 105 deletions(-)
(limited to 'fs')
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index af4e45bd6cf..46a24a6ed09 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -62,7 +62,7 @@ ata *);
int (*removexattr) (struct dentry *, const char *);
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
void (*update_time)(struct inode *, struct timespec *, int);
- struct file * (*atomic_open)(struct inode *, struct dentry *,
+ int (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
umode_t create_mode, int *opened);
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index d7121051afc..d0d690bbc4c 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -364,7 +364,7 @@ struct inode_operations {
ssize_t (*listxattr) (struct dentry *, char *, size_t);
int (*removexattr) (struct dentry *, const char *);
void (*update_time)(struct inode *, struct timespec *, int);
- struct file * (*atomic_open)(struct inode *, struct dentry *,
+ int (*atomic_open)(struct inode *, struct dentry *,
struct opendata *, unsigned open_flag,
umode_t create_mode, int *opened);
};
@@ -482,8 +482,8 @@ otherwise noted.
atomic_open: called on the last component of an open. Using this optional
method the filesystem can look up, possibly create and open the file in
one atomic operation. If it cannot perform this (e.g. the file type
- turned out to be wrong) it may signal this by returning NULL instead of
- an open struct file pointer. This method is only called if the last
+ turned out to be wrong) it may signal this by returning 1 instead of
+ usual 0 or -ve . This method is only called if the last
component is negative or needs lookup. Cached positive dentries are
still handled by f_op->open().
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index de626b3b342..62ce8daefa9 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -856,7 +856,7 @@ error:
return ERR_PTR(result);
}
-static struct file *
+static int
v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t mode,
int *opened)
@@ -872,7 +872,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
if (d_unhashed(dentry)) {
res = v9fs_vfs_lookup(dir, dentry, NULL);
if (IS_ERR(res))
- return ERR_CAST(res);
+ return PTR_ERR(res);
if (res)
dentry = res;
@@ -881,7 +881,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
/* Only creates */
if (!(flags & O_CREAT) || dentry->d_inode) {
finish_no_open(od, res);
- return NULL;
+ return 1;
}
err = 0;
@@ -933,13 +933,11 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
*opened |= FILE_CREATED;
out:
dput(res);
- return filp;
+ return err;
error:
if (fid)
p9_client_clunk(fid);
-
- filp = ERR_PTR(err);
goto out;
}
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 3db55471bc9..69f05109f75 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -240,7 +240,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
}
-static struct file *
+static int
v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t omode,
int *opened)
@@ -262,7 +262,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
if (d_unhashed(dentry)) {
res = v9fs_vfs_lookup(dir, dentry, NULL);
if (IS_ERR(res))
- return ERR_CAST(res);
+ return PTR_ERR(res);
if (res)
dentry = res;
@@ -271,7 +271,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
/* Only creates */
if (!(flags & O_CREAT) || dentry->d_inode) {
finish_no_open(od, res);
- return NULL;
+ return 1;
}
v9ses = v9fs_inode2v9ses(dir);
@@ -284,7 +284,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
- goto err_return;
+ goto out;
}
/* clone a fid to use for creation */
@@ -292,7 +292,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
- goto err_return;
+ goto out;
}
gid = v9fs_get_fsgid_for_create(dir);
@@ -370,7 +370,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
*opened |= FILE_CREATED;
out:
dput(res);
- return filp;
+ return err;
error:
if (fid)
@@ -379,8 +379,6 @@ err_clunk_old_fid:
if (ofid)
p9_client_clunk(ofid);
v9fs_set_create_acl(NULL, &dacl, &pacl);
-err_return:
- filp = ERR_PTR(err);
goto out;
}
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 81e5e908df9..d8bfabeeaa2 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -634,21 +634,20 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
return dentry;
}
-struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags, umode_t mode,
- int *opened)
+int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags, umode_t mode,
+ int *opened)
{
int err;
struct dentry *res = NULL;
- struct file *filp;
if (!(flags & O_CREAT)) {
if (dentry->d_name.len > NAME_MAX)
- return ERR_PTR(-ENAMETOOLONG);
+ return -ENAMETOOLONG;
err = ceph_init_dentry(dentry);
if (err < 0)
- return ERR_PTR(err);
+ return err;
return ceph_lookup_open(dir, dentry, od, flags, mode, opened);
}
@@ -656,7 +655,7 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
if (d_unhashed(dentry)) {
res = ceph_lookup(dir, dentry, NULL);
if (IS_ERR(res))
- return ERR_CAST(res);
+ return PTR_ERR(res);
if (res)
dentry = res;
@@ -665,14 +664,14 @@ struct file *ceph_atomic_open(struct inode *dir, struct dentry *dentry,
/* We don't deal with positive dentries here */
if (dentry->d_inode) {
finish_no_open(od, res);
- return NULL;
+ return 1;
}
*opened |= FILE_CREATED;
- filp = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
+ err = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
dput(res);
- return filp;
+ return err;
}
/*
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4c304a90d04..b8cc3ee5401 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -213,9 +213,9 @@ out:
* may_open() fails, the struct *file gets cleaned up (i.e.
* ceph_release gets called). So fear not!
*/
-struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags, umode_t mode,
- int *opened)
+int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags, umode_t mode,
+ int *opened)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -230,7 +230,7 @@ struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
/* do the open */
req = prepare_open_request(dir->i_sb, flags, mode);
if (IS_ERR(req))
- return ERR_CAST(req);
+ return PTR_ERR(req);
req->r_dentry = dget(dentry);
req->r_num_caps = 2;
if (flags & O_CREAT) {
@@ -257,10 +257,10 @@ out:
dout("ceph_lookup_open result=%p\n", ret);
if (IS_ERR(ret))
- return ERR_CAST(ret);
+ return PTR_ERR(ret);
dput(ret);
- return err ? ERR_PTR(err) : file;
+ return err;
}
int ceph_release(struct inode *inode, struct file *file)
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index f9a325108b4..f7e8e82ec47 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -806,9 +806,9 @@ extern int ceph_copy_from_page_vector(struct page **pages,
loff_t off, size_t len);
extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
extern int ceph_open(struct inode *inode, struct file *file);
-extern struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags,
- umode_t mode, int *opened);
+extern int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags,
+ umode_t mode, int *opened);
extern int ceph_release(struct inode *inode, struct file *filp);
/* dir.c */
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 92a7c3d8a03..58d9aca46a4 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -46,9 +46,9 @@ extern const struct inode_operations cifs_dir_inode_ops;
extern struct inode *cifs_root_iget(struct super_block *);
extern int cifs_create(struct inode *, struct dentry *, umode_t,
struct nameidata *);
-extern struct file *cifs_atomic_open(struct inode *, struct dentry *,
- struct opendata *, unsigned, umode_t,
- int *);
+extern int cifs_atomic_open(struct inode *, struct dentry *,
+ struct opendata *, unsigned, umode_t,
+ int *);
extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
struct nameidata *);
extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 6cdf23fd70e..8ca70b102b9 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -376,7 +376,7 @@ out:
return rc;
}
-struct file *
+int
cifs_atomic_open(struct inode *inode, struct dentry *direntry,
struct opendata *od, unsigned oflags, umode_t mode,
int *opened)
@@ -403,15 +403,15 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if (!(oflags & O_CREAT)) {
struct dentry *res = cifs_lookup(inode, direntry, NULL);
if (IS_ERR(res))
- return ERR_CAST(res);
+ return PTR_ERR(res);
finish_no_open(od, res);
- return NULL;
+ return 1;
}
rc = check_name(direntry);
if (rc)
- return ERR_PTR(rc);
+ return rc;
xid = GetXid();
@@ -428,13 +428,12 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
&oplock, &fileHandle, opened);
- if (rc) {
- filp = ERR_PTR(rc);
+ if (rc)
goto out;
- }
filp = finish_open(od, direntry, generic_file_open, opened);
if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
CIFSSMBClose(xid, tcon, fileHandle);
goto out;
}
@@ -443,14 +442,14 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if (pfile_info == NULL) {
CIFSSMBClose(xid, tcon, fileHandle);
fput(filp);
- filp = ERR_PTR(-ENOMEM);
+ rc = -ENOMEM;
}
out:
cifs_put_tlink(tlink);
free_xid:
FreeXid(xid);
- return filp;
+ return rc;
}
int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 345f78ee5c9..8a9ca09e87d 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -369,9 +369,9 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
* If the filesystem doesn't support this, then fall back to separate
* 'mknod' + 'open' requests.
*/
-static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
- struct opendata *od, unsigned flags,
- umode_t mode, int *opened)
+static int fuse_create_open(struct inode *dir, struct dentry *entry,
+ struct opendata *od, unsigned flags,
+ umode_t mode, int *opened)
{
int err;
struct inode *inode;
@@ -452,12 +452,14 @@ static struct file *fuse_create_open(struct inode *dir, struct dentry *entry,
fuse_invalidate_attr(dir);
file = finish_open(od, entry, generic_file_open, opened);
if (IS_ERR(file)) {
+ err = PTR_ERR(file);
fuse_sync_release(ff, flags);
} else {
file->private_data = fuse_file_get(ff);
fuse_finish_open(inode, file);
+ err = 0;
}
- return file;
+ return err;
out_free_ff:
fuse_file_free(ff);
@@ -466,23 +468,22 @@ out_put_request:
out_put_forget_req:
kfree(forget);
out_err:
- return ERR_PTR(err);
+ return err;
}
static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
-static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
- struct opendata *od, unsigned flags,
- umode_t mode, int *opened)
+static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
+ struct opendata *od, unsigned flags,
+ umode_t mode, int *opened)
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
- struct file *file;
struct dentry *res = NULL;
if (d_unhashed(entry)) {
res = fuse_lookup(dir, entry, NULL);
if (IS_ERR(res))
- return ERR_CAST(res);
+ return PTR_ERR(res);
if (res)
entry = res;
@@ -497,24 +498,22 @@ static struct file *fuse_atomic_open(struct inode *dir, struct dentry *entry,
if (fc->no_create)
goto mknod;
- file = fuse_create_open(dir, entry, od, flags, mode, opened);
- if (PTR_ERR(file) == -ENOSYS) {
+ err = fuse_create_open(dir, entry, od, flags, mode, opened);
+ if (err == -ENOSYS) {
fc->no_create = 1;
goto mknod;
}
out_dput:
dput(res);
- return file;
+ return err;
mknod:
err = fuse_mknod(dir, entry, mode, 0);
- if (err) {
- file = ERR_PTR(err);
+ if (err)
goto out_dput;
- }
no_open:
finish_no_open(od, res);
- return NULL;
+ return 1;
}
/*
diff --git a/fs/namei.c b/fs/namei.c
index 18b9326d951..f0dae0057ec 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2204,7 +2204,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
umode_t mode;
int error;
int acc_mode;
- struct file *filp;
+ struct file *filp = NULL;
int create_error = 0;
struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
@@ -2271,14 +2271,15 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
od->dentry = DENTRY_NOT_SET;
od->mnt = nd->path.mnt;
- filp = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
+ error = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
opened);
- if (IS_ERR(filp)) {
+ if (error < 0) {
if (WARN_ON(od->dentry != DENTRY_NOT_SET))
dput(od->dentry);
- if (create_error && PTR_ERR(filp) == -ENOENT)
- filp = ERR_PTR(create_error);
+ if (create_error && error == -ENOENT)
+ error = create_error;
+ filp = ERR_PTR(error);
goto out;
}
@@ -2288,7 +2289,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
acc_mode = MAY_OPEN;
}
- if (!filp) {
+ if (error) { /* returned 1, that is */
if (WARN_ON(od->dentry == DENTRY_NOT_SET)) {
filp = ERR_PTR(-EIO);
goto out;
@@ -2304,6 +2305,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
* We didn't have the inode before the open, so check open permission
* here.
*/
+ filp = od->filp;
error = may_open(&filp->f_path, acc_mode, open_flag);
if (error) {
fput(filp);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 6deb2549ead..b56f4b36ed4 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -111,9 +111,9 @@ const struct inode_operations nfs3_dir_inode_operations = {
#ifdef CONFIG_NFS_V4
-static struct file *nfs_atomic_open(struct inode *, struct dentry *,
- struct opendata *, unsigned, umode_t,
- int *);
+static int nfs_atomic_open(struct inode *, struct dentry *,
+ struct opendata *, unsigned, umode_t,
+ int *);
const struct inode_operations nfs4_dir_inode_operations = {
.create = nfs_create,
.lookup = nfs_lookup,
@@ -1387,10 +1387,10 @@ static int do_open(struct inode *inode, struct file *filp)
return 0;
}
-static struct file *nfs_finish_open(struct nfs_open_context *ctx,
- struct dentry *dentry,
- struct opendata *od, unsigned open_flags,
- int *opened)
+static int nfs_finish_open(struct nfs_open_context *ctx,
+ struct dentry *dentry,
+ struct opendata *od, unsigned open_flags,
+ int *opened)
{
struct file *filp;
int err;
@@ -1403,30 +1403,31 @@ static struct file *nfs_finish_open(struct nfs_open_context *ctx,
/* If the open_intent is for execute, we have an extra check to make */
if (ctx->mode & FMODE_EXEC) {
err = nfs_may_open(dentry->d_inode, ctx->cred, open_flags);
- if (err < 0) {
- filp = ERR_PTR(err);
+ if (err < 0)
goto out;
- }
}
filp = finish_open(od, dentry, do_open, opened);
- if (!IS_ERR(filp))
- nfs_file_set_open_context(filp, ctx);
+ if (IS_ERR(filp)) {
+ err = PTR_ERR(filp);
+ goto out;
+ }
+ nfs_file_set_open_context(filp, ctx);
+ err = 0;
out:
put_nfs_open_context(ctx);
- return filp;
+ return err;
}
-static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned open_flags,
- umode_t mode, int *opened)
+static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned open_flags,
+ umode_t mode, int *opened)
{
struct nfs_open_context *ctx;
struct dentry *res;
struct iattr attr = { .ia_valid = ATTR_OPEN };
struct inode *inode;
- struct file *filp;
int err;
/* Expect a negative dentry */
@@ -1437,21 +1438,19 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
/* NFS only supports OPEN on regular files */
if ((open_flags & O_DIRECTORY)) {
- err = -ENOENT;
if (!d_unhashed(dentry)) {
/*
* Hashed negative dentry with O_DIRECTORY: dentry was
* revalidated and is fine, no need to perform lookup
* again
*/
- goto out_err;
+ return -ENOENT;
}
goto no_open;
}
- err = -ENAMETOOLONG;
if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
- goto out_err;
+ return -ENAMETOOLONG;
if (open_flags & O_CREAT) {
attr.ia_valid |= ATTR_MODE;
@@ -1465,7 +1464,7 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
ctx = create_nfs_open_context(dentry, open_flags);
err = PTR_ERR(ctx);
if (IS_ERR(ctx))
- goto out_err;
+ goto out;
nfs_block_sillyrename(dentry->d_parent);
inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
@@ -1489,7 +1488,7 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
default:
break;
}
- goto out_err;
+ goto out;
}
res = d_add_unique(dentry, inode);
if (res != NULL)
@@ -1498,22 +1497,20 @@ static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
nfs_unblock_sillyrename(dentry->d_parent);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- filp = nfs_finish_open(ctx, dentry, od, open_flags, opened);
+ err = nfs_finish_open(ctx, dentry, od, open_flags, opened);
dput(res);
- return filp;
-
-out_err:
- return ERR_PTR(err);
+out:
+ return err;
no_open:
res = nfs_lookup(dir, dentry, NULL);
err = PTR_ERR(res);
if (IS_ERR(res))
- goto out_err;
+ goto out;
finish_no_open(od, res);
- return NULL;
+ return 1;
}
static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a7618cf28d0..33bda922988 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1694,9 +1694,9 @@ struct inode_operations {
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
u64 len);
int (*update_time)(struct inode *, struct timespec *, int);
- struct file * (*atomic_open)(struct inode *, struct dentry *,
- struct opendata *, unsigned open_flag,
- umode_t create_mode, int *opened);
+ int (*atomic_open)(struct inode *, struct dentry *,
+ struct opendata *, unsigned open_flag,
+ umode_t create_mode, int *opened);
} ____cacheline_aligned;
struct seq_file;
--
cgit v1.2.3-70-g09d2
From a4a3bdd778715999ddfeefdc52ab76254580fa76 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 05:55:37 -0400
Subject: kill opendata->{mnt,dentry}
->filp->f_path is there for purpose...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/internal.h | 2 --
fs/namei.c | 15 ++++++---------
fs/open.c | 6 +++---
3 files changed, 9 insertions(+), 14 deletions(-)
(limited to 'fs')
diff --git a/fs/internal.h b/fs/internal.h
index ae69a3b150d..09003a02292 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -83,8 +83,6 @@ extern struct super_block *user_get_super(dev_t);
* open.c
*/
struct opendata {
- struct dentry *dentry;
- struct vfsmount *mnt;
struct file *filp;
};
struct open_flags {
diff --git a/fs/namei.c b/fs/namei.c
index f0dae0057ec..af83ede92a4 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2269,14 +2269,11 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (nd->flags & LOOKUP_DIRECTORY)
open_flag |= O_DIRECTORY;
- od->dentry = DENTRY_NOT_SET;
- od->mnt = nd->path.mnt;
+ od->filp->f_path.dentry = DENTRY_NOT_SET;
+ od->filp->f_path.mnt = nd->path.mnt;
error = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
opened);
if (error < 0) {
- if (WARN_ON(od->dentry != DENTRY_NOT_SET))
- dput(od->dentry);
-
if (create_error && error == -ENOENT)
error = create_error;
filp = ERR_PTR(error);
@@ -2290,13 +2287,13 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
}
if (error) { /* returned 1, that is */
- if (WARN_ON(od->dentry == DENTRY_NOT_SET)) {
+ if (WARN_ON(od->filp->f_path.dentry == DENTRY_NOT_SET)) {
filp = ERR_PTR(-EIO);
goto out;
}
- if (od->dentry) {
+ if (od->filp->f_path.dentry) {
dput(dentry);
- dentry = od->dentry;
+ dentry = od->filp->f_path.dentry;
}
goto looked_up;
}
@@ -2607,7 +2604,7 @@ finish_open_created:
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
goto exit;
- od->mnt = nd->path.mnt;
+ od->filp->f_path.mnt = nd->path.mnt;
filp = finish_open(od, nd->path.dentry, NULL, opened);
if (IS_ERR(filp)) {
if (filp == ERR_PTR(-EOPENSTALE))
diff --git a/fs/open.c b/fs/open.c
index c87f98201c2..2b1654d8bfb 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -788,10 +788,10 @@ struct file *finish_open(struct opendata *od, struct dentry *dentry,
struct file *res;
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
- mntget(od->mnt);
+ mntget(od->filp->f_path.mnt);
dget(dentry);
- res = do_dentry_open(dentry, od->mnt, od->filp, open, current_cred());
+ res = do_dentry_open(dentry, od->filp->f_path.mnt, od->filp, open, current_cred());
if (!IS_ERR(res))
*opened |= FILE_OPENED;
@@ -810,7 +810,7 @@ EXPORT_SYMBOL(finish_open);
*/
void finish_no_open(struct opendata *od, struct dentry *dentry)
{
- od->dentry = dentry;
+ od->filp->f_path.dentry = dentry;
}
EXPORT_SYMBOL(finish_no_open);
--
cgit v1.2.3-70-g09d2
From 30d904947459cca2beb69e0110716f5248b31f2a Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 22 Jun 2012 12:40:19 +0400
Subject: kill struct opendata
Just pass struct file *. Methods are happier that way...
There's no need to return struct file * from finish_open() now,
so let it return int. Next: saner prototypes for parts in
namei.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/vfs.txt | 2 +-
fs/9p/vfs_inode.c | 15 +++++-------
fs/9p/vfs_inode_dotl.c | 15 +++++-------
fs/ceph/dir.c | 8 +++----
fs/ceph/file.c | 7 ++----
fs/ceph/super.h | 2 +-
fs/cifs/cifsfs.h | 2 +-
fs/cifs/dir.c | 9 ++++----
fs/fuse/dir.c | 15 +++++-------
fs/internal.h | 3 ---
fs/namei.c | 48 ++++++++++++++++++++-------------------
fs/nfs/dir.c | 20 +++++++---------
fs/open.c | 20 ++++++++--------
include/linux/fs.h | 11 ++++-----
15 files changed, 81 insertions(+), 98 deletions(-)
(limited to 'fs')
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 46a24a6ed09..33e5243948f 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -63,7 +63,7 @@ ata *);
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
- struct opendata *, unsigned open_flag,
+ struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
locking rules:
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index d0d690bbc4c..279de219036 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -365,7 +365,7 @@ struct inode_operations {
int (*removexattr) (struct dentry *, const char *);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
- struct opendata *, unsigned open_flag,
+ struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
};
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 62ce8daefa9..2b05651e0c3 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -858,12 +858,11 @@ error:
static int
v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags, umode_t mode,
+ struct file *file, unsigned flags, umode_t mode,
int *opened)
{
int err;
u32 perm;
- struct file *filp;
struct v9fs_inode *v9inode;
struct v9fs_session_info *v9ses;
struct p9_fid *fid, *inode_fid;
@@ -880,7 +879,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
/* Only creates */
if (!(flags & O_CREAT) || dentry->d_inode) {
- finish_no_open(od, res);
+ finish_no_open(file, res);
return 1;
}
@@ -918,16 +917,14 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
v9inode->writeback_fid = (void *) inode_fid;
}
mutex_unlock(&v9inode->v_mutex);
- filp = finish_open(od, dentry, generic_file_open, opened);
- if (IS_ERR(filp)) {
- err = PTR_ERR(filp);
+ err = finish_open(file, dentry, generic_file_open, opened);
+ if (err)
goto error;
- }
- filp->private_data = fid;
+ file->private_data = fid;
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cache)
- v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
+ v9fs_cache_inode_set_cookie(dentry->d_inode, file);
#endif
*opened |= FILE_CREATED;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 69f05109f75..cfaebdef974 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -242,14 +242,13 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
static int
v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags, umode_t omode,
+ struct file *file, unsigned flags, umode_t omode,
int *opened)
{
int err = 0;
gid_t gid;
umode_t mode;
char *name = NULL;
- struct file *filp;
struct p9_qid qid;
struct inode *inode;
struct p9_fid *fid = NULL;
@@ -270,7 +269,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
/* Only creates */
if (!(flags & O_CREAT) || dentry->d_inode) {
- finish_no_open(od, res);
+ finish_no_open(file, res);
return 1;
}
@@ -357,15 +356,13 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
}
mutex_unlock(&v9inode->v_mutex);
/* Since we are opening a file, assign the open fid to the file */
- filp = finish_open(od, dentry, generic_file_open, opened);
- if (IS_ERR(filp)) {
- err = PTR_ERR(filp);
+ err = finish_open(file, dentry, generic_file_open, opened);
+ if (err)
goto err_clunk_old_fid;
- }
- filp->private_data = ofid;
+ file->private_data = ofid;
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cache)
- v9fs_cache_inode_set_cookie(inode, filp);
+ v9fs_cache_inode_set_cookie(inode, file);
#endif
*opened |= FILE_CREATED;
out:
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index d8bfabeeaa2..80c848e0539 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -635,7 +635,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
}
int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags, umode_t mode,
+ struct file *file, unsigned flags, umode_t mode,
int *opened)
{
int err;
@@ -649,7 +649,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
if (err < 0)
return err;
- return ceph_lookup_open(dir, dentry, od, flags, mode, opened);
+ return ceph_lookup_open(dir, dentry, file, flags, mode, opened);
}
if (d_unhashed(dentry)) {
@@ -663,12 +663,12 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
/* We don't deal with positive dentries here */
if (dentry->d_inode) {
- finish_no_open(od, res);
+ finish_no_open(file, res);
return 1;
}
*opened |= FILE_CREATED;
- err = ceph_lookup_open(dir, dentry, od, flags, mode, opened);
+ err = ceph_lookup_open(dir, dentry, file, flags, mode, opened);
dput(res);
return err;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index b8cc3ee5401..1b81d6c3187 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -214,12 +214,11 @@ out:
* ceph_release gets called). So fear not!
*/
int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags, umode_t mode,
+ struct file *file, unsigned flags, umode_t mode,
int *opened)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
- struct file *file = NULL;
struct ceph_mds_request *req;
struct dentry *ret;
int err;
@@ -248,9 +247,7 @@ int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
err = ceph_handle_notrace_create(dir, dentry);
if (err)
goto out;
- file = finish_open(od, req->r_dentry, ceph_open, opened);
- if (IS_ERR(file))
- err = PTR_ERR(file);
+ err = finish_open(file, req->r_dentry, ceph_open, opened);
out:
ret = ceph_finish_lookup(req, dentry, err);
ceph_mdsc_put_request(req);
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index f7e8e82ec47..f4d5522cb61 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -807,7 +807,7 @@ extern int ceph_copy_from_page_vector(struct page **pages,
extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
extern int ceph_open(struct inode *inode, struct file *file);
extern int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned flags,
+ struct file *od, unsigned flags,
umode_t mode, int *opened);
extern int ceph_release(struct inode *inode, struct file *filp);
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 58d9aca46a4..48bb474ce29 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -47,7 +47,7 @@ extern struct inode *cifs_root_iget(struct super_block *);
extern int cifs_create(struct inode *, struct dentry *, umode_t,
struct nameidata *);
extern int cifs_atomic_open(struct inode *, struct dentry *,
- struct opendata *, unsigned, umode_t,
+ struct file *, unsigned, umode_t,
int *);
extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
struct nameidata *);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 8ca70b102b9..c00c192f17e 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -378,7 +378,7 @@ out:
int
cifs_atomic_open(struct inode *inode, struct dentry *direntry,
- struct opendata *od, unsigned oflags, umode_t mode,
+ struct file *file, unsigned oflags, umode_t mode,
int *opened)
{
int rc;
@@ -405,7 +405,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if (IS_ERR(res))
return PTR_ERR(res);
- finish_no_open(od, res);
+ finish_no_open(file, res);
return 1;
}
@@ -431,9 +431,8 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if (rc)
goto out;
- filp = finish_open(od, direntry, generic_file_open, opened);
- if (IS_ERR(filp)) {
- rc = PTR_ERR(filp);
+ rc = finish_open(file, direntry, generic_file_open, opened);
+ if (rc) {
CIFSSMBClose(xid, tcon, fileHandle);
goto out;
}
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 8a9ca09e87d..110db5425dc 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -370,7 +370,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
* 'mknod' + 'open' requests.
*/
static int fuse_create_open(struct inode *dir, struct dentry *entry,
- struct opendata *od, unsigned flags,
+ struct file *file, unsigned flags,
umode_t mode, int *opened)
{
int err;
@@ -382,7 +382,6 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
struct fuse_open_out outopen;
struct fuse_entry_out outentry;
struct fuse_file *ff;
- struct file *file;
forget = fuse_alloc_forget();
err = -ENOMEM;
@@ -450,14 +449,12 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
d_instantiate(entry, inode);
fuse_change_entry_timeout(entry, &outentry);
fuse_invalidate_attr(dir);
- file = finish_open(od, entry, generic_file_open, opened);
- if (IS_ERR(file)) {
- err = PTR_ERR(file);
+ err = finish_open(file, entry, generic_file_open, opened);
+ if (err) {
fuse_sync_release(ff, flags);
} else {
file->private_data = fuse_file_get(ff);
fuse_finish_open(inode, file);
- err = 0;
}
return err;
@@ -473,7 +470,7 @@ out_err:
static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
- struct opendata *od, unsigned flags,
+ struct file *file, unsigned flags,
umode_t mode, int *opened)
{
int err;
@@ -498,7 +495,7 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
if (fc->no_create)
goto mknod;
- err = fuse_create_open(dir, entry, od, flags, mode, opened);
+ err = fuse_create_open(dir, entry, file, flags, mode, opened);
if (err == -ENOSYS) {
fc->no_create = 1;
goto mknod;
@@ -512,7 +509,7 @@ mknod:
if (err)
goto out_dput;
no_open:
- finish_no_open(od, res);
+ finish_no_open(file, res);
return 1;
}
diff --git a/fs/internal.h b/fs/internal.h
index 09003a02292..8a9f5fa840f 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -82,9 +82,6 @@ extern struct super_block *user_get_super(dev_t);
/*
* open.c
*/
-struct opendata {
- struct file *filp;
-};
struct open_flags {
int open_flag;
umode_t mode;
diff --git a/fs/namei.c b/fs/namei.c
index af83ede92a4..aaff8a86215 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2194,7 +2194,7 @@ static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
}
static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
- struct path *path, struct opendata *od,
+ struct path *path, struct file *file,
const struct open_flags *op,
bool *want_write, bool need_lookup,
int *opened)
@@ -2269,9 +2269,9 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (nd->flags & LOOKUP_DIRECTORY)
open_flag |= O_DIRECTORY;
- od->filp->f_path.dentry = DENTRY_NOT_SET;
- od->filp->f_path.mnt = nd->path.mnt;
- error = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
+ file->f_path.dentry = DENTRY_NOT_SET;
+ file->f_path.mnt = nd->path.mnt;
+ error = dir->i_op->atomic_open(dir, dentry, file, open_flag, mode,
opened);
if (error < 0) {
if (create_error && error == -ENOENT)
@@ -2287,13 +2287,13 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
}
if (error) { /* returned 1, that is */
- if (WARN_ON(od->filp->f_path.dentry == DENTRY_NOT_SET)) {
+ if (WARN_ON(file->f_path.dentry == DENTRY_NOT_SET)) {
filp = ERR_PTR(-EIO);
goto out;
}
- if (od->filp->f_path.dentry) {
+ if (file->f_path.dentry) {
dput(dentry);
- dentry = od->filp->f_path.dentry;
+ dentry = file->f_path.dentry;
}
goto looked_up;
}
@@ -2302,7 +2302,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
* We didn't have the inode before the open, so check open permission
* here.
*/
- filp = od->filp;
+ filp = file;
error = may_open(&filp->f_path, acc_mode, open_flag);
if (error) {
fput(filp);
@@ -2350,7 +2350,7 @@ looked_up:
* was performed, only lookup.
*/
static struct file *lookup_open(struct nameidata *nd, struct path *path,
- struct opendata *od,
+ struct file *file,
const struct open_flags *op,
bool *want_write, int *opened)
{
@@ -2370,7 +2370,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
goto out_no_open;
if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
- return atomic_open(nd, dentry, path, od, op, want_write,
+ return atomic_open(nd, dentry, path, file, op, want_write,
need_lookup, opened);
}
@@ -2420,7 +2420,7 @@ out_dput:
* Handle the last step of open()
*/
static struct file *do_last(struct nameidata *nd, struct path *path,
- struct opendata *od, const struct open_flags *op,
+ struct file *file, const struct open_flags *op,
int *opened, const char *pathname)
{
struct dentry *dir = nd->path.dentry;
@@ -2497,7 +2497,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
- filp = lookup_open(nd, path, od, op, &want_write, opened);
+ filp = lookup_open(nd, path, file, op, &want_write, opened);
mutex_unlock(&dir->d_inode->i_mutex);
if (filp) {
@@ -2604,13 +2604,15 @@ finish_open_created:
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
goto exit;
- od->filp->f_path.mnt = nd->path.mnt;
- filp = finish_open(od, nd->path.dentry, NULL, opened);
- if (IS_ERR(filp)) {
- if (filp == ERR_PTR(-EOPENSTALE))
+ file->f_path.mnt = nd->path.mnt;
+ error = finish_open(file, nd->path.dentry, NULL, opened);
+ if (error) {
+ filp = ERR_PTR(error);
+ if (error == -EOPENSTALE)
goto stale_open;
goto out;
}
+ filp = file;
opened:
error = open_check_o_direct(filp);
if (error)
@@ -2663,17 +2665,17 @@ static struct file *path_openat(int dfd, const char *pathname,
struct nameidata *nd, const struct open_flags *op, int flags)
{
struct file *base = NULL;
- struct opendata od;
+ struct file *file;
struct file *res;
struct path path;
int opened = 0;
int error;
- od.filp = get_empty_filp();
- if (!od.filp)
+ file = get_empty_filp();
+ if (!file)
return ERR_PTR(-ENFILE);
- od.filp->f_flags = op->open_flag;
+ file->f_flags = op->open_flag;
error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
@@ -2684,7 +2686,7 @@ static struct file *path_openat(int dfd, const char *pathname,
if (unlikely(error))
goto out_filp;
- res = do_last(nd, &path, &od, op, &opened, pathname);
+ res = do_last(nd, &path, file, op, &opened, pathname);
while (unlikely(!res)) { /* trailing symlink */
struct path link = path;
void *cookie;
@@ -2699,7 +2701,7 @@ static struct file *path_openat(int dfd, const char *pathname,
error = follow_link(&link, nd, &cookie);
if (unlikely(error))
goto out_filp;
- res = do_last(nd, &path, &od, op, &opened, pathname);
+ res = do_last(nd, &path, file, op, &opened, pathname);
put_link(nd, &link, cookie);
}
out:
@@ -2708,7 +2710,7 @@ out:
if (base)
fput(base);
if (!(opened & FILE_OPENED))
- put_filp(od.filp);
+ put_filp(file);
if (res == ERR_PTR(-EOPENSTALE)) {
if (flags & LOOKUP_RCU)
res = ERR_PTR(-ECHILD);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index b56f4b36ed4..dafc86c1c35 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -112,7 +112,7 @@ const struct inode_operations nfs3_dir_inode_operations = {
#ifdef CONFIG_NFS_V4
static int nfs_atomic_open(struct inode *, struct dentry *,
- struct opendata *, unsigned, umode_t,
+ struct file *, unsigned, umode_t,
int *);
const struct inode_operations nfs4_dir_inode_operations = {
.create = nfs_create,
@@ -1389,10 +1389,9 @@ static int do_open(struct inode *inode, struct file *filp)
static int nfs_finish_open(struct nfs_open_context *ctx,
struct dentry *dentry,
- struct opendata *od, unsigned open_flags,
+ struct file *file, unsigned open_flags,
int *opened)
{
- struct file *filp;
int err;
if (ctx->dentry != dentry) {
@@ -1407,13 +1406,10 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
goto out;
}
- filp = finish_open(od, dentry, do_open, opened);
- if (IS_ERR(filp)) {
- err = PTR_ERR(filp);
+ err = finish_open(file, dentry, do_open, opened);
+ if (err)
goto out;
- }
- nfs_file_set_open_context(filp, ctx);
- err = 0;
+ nfs_file_set_open_context(file, ctx);
out:
put_nfs_open_context(ctx);
@@ -1421,7 +1417,7 @@ out:
}
static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
- struct opendata *od, unsigned open_flags,
+ struct file *file, unsigned open_flags,
umode_t mode, int *opened)
{
struct nfs_open_context *ctx;
@@ -1497,7 +1493,7 @@ static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
nfs_unblock_sillyrename(dentry->d_parent);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- err = nfs_finish_open(ctx, dentry, od, open_flags, opened);
+ err = nfs_finish_open(ctx, dentry, file, open_flags, opened);
dput(res);
out:
@@ -1509,7 +1505,7 @@ no_open:
if (IS_ERR(res))
goto out;
- finish_no_open(od, res);
+ finish_no_open(file, res);
return 1;
}
diff --git a/fs/open.c b/fs/open.c
index 2b1654d8bfb..fc829d6c3a4 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -781,21 +781,23 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
* If the open callback is set to NULL, then the standard f_op->open()
* filesystem callback is substituted.
*/
-struct file *finish_open(struct opendata *od, struct dentry *dentry,
- int (*open)(struct inode *, struct file *),
- int *opened)
+int finish_open(struct file *file, struct dentry *dentry,
+ int (*open)(struct inode *, struct file *),
+ int *opened)
{
struct file *res;
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
- mntget(od->filp->f_path.mnt);
+ mntget(file->f_path.mnt);
dget(dentry);
- res = do_dentry_open(dentry, od->filp->f_path.mnt, od->filp, open, current_cred());
- if (!IS_ERR(res))
+ res = do_dentry_open(dentry, file->f_path.mnt, file, open, current_cred());
+ if (!IS_ERR(res)) {
*opened |= FILE_OPENED;
+ return 0;
+ }
- return res;
+ return PTR_ERR(res);
}
EXPORT_SYMBOL(finish_open);
@@ -808,9 +810,9 @@ EXPORT_SYMBOL(finish_open);
* This can be used to set the result of a successful lookup in ->atomic_open().
* The filesystem's atomic_open() method shall return NULL after calling this.
*/
-void finish_no_open(struct opendata *od, struct dentry *dentry)
+void finish_no_open(struct file *file, struct dentry *dentry)
{
- od->filp->f_path.dentry = dentry;
+ file->f_path.dentry = dentry;
}
EXPORT_SYMBOL(finish_no_open);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 33bda922988..1dcc75c9576 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -427,7 +427,6 @@ struct kstatfs;
struct vm_area_struct;
struct vfsmount;
struct cred;
-struct opendata;
extern void __init inode_init(void);
extern void __init inode_init_early(void);
@@ -1695,7 +1694,7 @@ struct inode_operations {
u64 len);
int (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
- struct opendata *, unsigned open_flag,
+ struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
} ____cacheline_aligned;
@@ -2069,10 +2068,10 @@ enum {
FILE_CREATED = 1,
FILE_OPENED = 2
};
-extern struct file *finish_open(struct opendata *od, struct dentry *dentry,
- int (*open)(struct inode *, struct file *),
- int *opened);
-extern void finish_no_open(struct opendata *od, struct dentry *dentry);
+extern int finish_open(struct file *file, struct dentry *dentry,
+ int (*open)(struct inode *, struct file *),
+ int *opened);
+extern void finish_no_open(struct file *file, struct dentry *dentry);
/* fs/ioctl.c */
--
cgit v1.2.3-70-g09d2
From 2675a4eb6a9f1240098721c8a84ede28abd9d7b3 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 22 Jun 2012 12:41:10 +0400
Subject: fs/namei.c: get do_last() and friends return int
Same conventions as for ->atomic_open(). Trimmed the
forest of labels a bit, while we are at it...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 150 +++++++++++++++++++++++++++++--------------------------------
1 file changed, 70 insertions(+), 80 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index aaff8a86215..16256d915cb 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2193,18 +2193,17 @@ static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
return security_inode_create(dir->dentry->d_inode, dentry, mode);
}
-static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
- struct path *path, struct file *file,
- const struct open_flags *op,
- bool *want_write, bool need_lookup,
- int *opened)
+static int atomic_open(struct nameidata *nd, struct dentry *dentry,
+ struct path *path, struct file *file,
+ const struct open_flags *op,
+ bool *want_write, bool need_lookup,
+ int *opened)
{
struct inode *dir = nd->path.dentry->d_inode;
unsigned open_flag = open_to_namei_flags(op->open_flag);
umode_t mode;
int error;
int acc_mode;
- struct file *filp = NULL;
int create_error = 0;
struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
@@ -2212,7 +2211,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
/* Don't create child dentry for a dead directory. */
if (unlikely(IS_DEADDIR(dir))) {
- filp = ERR_PTR(-ENOENT);
+ error = -ENOENT;
goto out;
}
@@ -2276,7 +2275,6 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (error < 0) {
if (create_error && error == -ENOENT)
error = create_error;
- filp = ERR_PTR(error);
goto out;
}
@@ -2288,7 +2286,7 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (error) { /* returned 1, that is */
if (WARN_ON(file->f_path.dentry == DENTRY_NOT_SET)) {
- filp = ERR_PTR(-EIO);
+ error = -EIO;
goto out;
}
if (file->f_path.dentry) {
@@ -2302,27 +2300,24 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
* We didn't have the inode before the open, so check open permission
* here.
*/
- filp = file;
- error = may_open(&filp->f_path, acc_mode, open_flag);
- if (error) {
- fput(filp);
- filp = ERR_PTR(error);
- }
+ error = may_open(&file->f_path, acc_mode, open_flag);
+ if (error)
+ fput(file);
out:
dput(dentry);
- return filp;
+ return error;
no_open:
if (need_lookup) {
dentry = lookup_real(dir, dentry, nd);
if (IS_ERR(dentry))
- return ERR_CAST(dentry);
+ return PTR_ERR(dentry);
if (create_error) {
int open_flag = op->open_flag;
- filp = ERR_PTR(create_error);
+ error = create_error;
if ((open_flag & O_EXCL)) {
if (!dentry->d_inode)
goto out;
@@ -2338,7 +2333,7 @@ no_open:
looked_up:
path->dentry = dentry;
path->mnt = nd->path.mnt;
- return NULL;
+ return 1;
}
/*
@@ -2349,10 +2344,10 @@ looked_up:
* Returns open file or NULL on success, error otherwise. NULL means no open
* was performed, only lookup.
*/
-static struct file *lookup_open(struct nameidata *nd, struct path *path,
- struct file *file,
- const struct open_flags *op,
- bool *want_write, int *opened)
+static int lookup_open(struct nameidata *nd, struct path *path,
+ struct file *file,
+ const struct open_flags *op,
+ bool *want_write, int *opened)
{
struct dentry *dir = nd->path.dentry;
struct inode *dir_inode = dir->d_inode;
@@ -2363,7 +2358,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
*opened &= ~FILE_CREATED;
dentry = lookup_dcache(&nd->last, dir, nd, &need_lookup);
if (IS_ERR(dentry))
- return ERR_CAST(dentry);
+ return PTR_ERR(dentry);
/* Cached positive dentry: will open in f_op->open */
if (!need_lookup && dentry->d_inode)
@@ -2379,7 +2374,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
dentry = lookup_real(dir_inode, dentry, nd);
if (IS_ERR(dentry))
- return ERR_CAST(dentry);
+ return PTR_ERR(dentry);
}
/* Negative dentry, just create the file */
@@ -2409,26 +2404,25 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
out_no_open:
path->dentry = dentry;
path->mnt = nd->path.mnt;
- return NULL;
+ return 1;
out_dput:
dput(dentry);
- return ERR_PTR(error);
+ return error;
}
/*
* Handle the last step of open()
*/
-static struct file *do_last(struct nameidata *nd, struct path *path,
- struct file *file, const struct open_flags *op,
- int *opened, const char *pathname)
+static int do_last(struct nameidata *nd, struct path *path,
+ struct file *file, const struct open_flags *op,
+ int *opened, const char *pathname)
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
bool will_truncate = (open_flag & O_TRUNC) != 0;
bool want_write = false;
int acc_mode = op->acc_mode;
- struct file *filp;
struct inode *inode;
bool symlink_ok = false;
struct path save_parent = { .dentry = NULL, .mnt = NULL };
@@ -2443,22 +2437,22 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
case LAST_DOT:
error = handle_dots(nd, nd->last_type);
if (error)
- return ERR_PTR(error);
+ return error;
/* fallthrough */
case LAST_ROOT:
error = complete_walk(nd);
if (error)
- return ERR_PTR(error);
+ return error;
audit_inode(pathname, nd->path.dentry);
if (open_flag & O_CREAT) {
error = -EISDIR;
- goto exit;
+ goto out;
}
goto finish_open;
case LAST_BIND:
error = complete_walk(nd);
if (error)
- return ERR_PTR(error);
+ return error;
audit_inode(pathname, dir);
goto finish_open;
}
@@ -2474,7 +2468,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
goto finish_lookup;
if (error < 0)
- goto exit;
+ goto out;
BUG_ON(nd->inode != dir->d_inode);
} else {
@@ -2486,29 +2480,29 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
*/
error = complete_walk(nd);
if (error)
- return ERR_PTR(error);
+ return error;
audit_inode(pathname, dir);
error = -EISDIR;
/* trailing slashes? */
if (nd->last.name[nd->last.len])
- goto exit;
+ goto out;
}
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
- filp = lookup_open(nd, path, file, op, &want_write, opened);
+ error = lookup_open(nd, path, file, op, &want_write, opened);
mutex_unlock(&dir->d_inode->i_mutex);
- if (filp) {
- if (IS_ERR(filp))
+ if (error <= 0) {
+ if (error)
goto out;
if ((*opened & FILE_CREATED) ||
- !S_ISREG(filp->f_path.dentry->d_inode->i_mode))
+ !S_ISREG(file->f_path.dentry->d_inode->i_mode))
will_truncate = false;
- audit_inode(pathname, filp->f_path.dentry);
+ audit_inode(pathname, file->f_path.dentry);
goto opened;
}
@@ -2554,18 +2548,18 @@ finish_lookup:
error = -ENOENT;
if (!inode) {
path_to_nameidata(path, nd);
- goto exit;
+ goto out;
}
if (should_follow_link(inode, !symlink_ok)) {
if (nd->flags & LOOKUP_RCU) {
if (unlikely(unlazy_walk(nd, path->dentry))) {
error = -ECHILD;
- goto exit;
+ goto out;
}
}
BUG_ON(inode != path->dentry->d_inode);
- return NULL;
+ return 1;
}
if ((nd->flags & LOOKUP_RCU) || nd->path.mnt != path->mnt) {
@@ -2581,14 +2575,14 @@ finish_lookup:
error = complete_walk(nd);
if (error) {
path_put(&save_parent);
- return ERR_PTR(error);
+ return error;
}
error = -EISDIR;
if ((open_flag & O_CREAT) && S_ISDIR(nd->inode->i_mode))
- goto exit;
+ goto out;
error = -ENOTDIR;
if ((nd->flags & LOOKUP_DIRECTORY) && !nd->inode->i_op->lookup)
- goto exit;
+ goto out;
audit_inode(pathname, nd->path.dentry);
finish_open:
if (!S_ISREG(nd->inode->i_mode))
@@ -2597,32 +2591,30 @@ finish_open:
if (will_truncate) {
error = mnt_want_write(nd->path.mnt);
if (error)
- goto exit;
+ goto out;
want_write = true;
}
finish_open_created:
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
- goto exit;
+ goto out;
file->f_path.mnt = nd->path.mnt;
error = finish_open(file, nd->path.dentry, NULL, opened);
if (error) {
- filp = ERR_PTR(error);
if (error == -EOPENSTALE)
goto stale_open;
goto out;
}
- filp = file;
opened:
- error = open_check_o_direct(filp);
+ error = open_check_o_direct(file);
if (error)
goto exit_fput;
- error = ima_file_check(filp, op->acc_mode);
+ error = ima_file_check(file, op->acc_mode);
if (error)
goto exit_fput;
if (will_truncate) {
- error = handle_truncate(filp);
+ error = handle_truncate(file);
if (error)
goto exit_fput;
}
@@ -2631,16 +2623,14 @@ out:
mnt_drop_write(nd->path.mnt);
path_put(&save_parent);
terminate_walk(nd);
- return filp;
+ return error;
exit_dput:
path_put_conditional(path, nd);
-exit:
- filp = ERR_PTR(error);
goto out;
exit_fput:
- fput(filp);
- goto exit;
+ fput(file);
+ goto out;
stale_open:
/* If no saved parent or already retried then can't retry */
@@ -2666,7 +2656,6 @@ static struct file *path_openat(int dfd, const char *pathname,
{
struct file *base = NULL;
struct file *file;
- struct file *res;
struct path path;
int opened = 0;
int error;
@@ -2679,29 +2668,29 @@ static struct file *path_openat(int dfd, const char *pathname,
error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
- goto out_filp;
+ goto out;
current->total_link_count = 0;
error = link_path_walk(pathname, nd);
if (unlikely(error))
- goto out_filp;
+ goto out;
- res = do_last(nd, &path, file, op, &opened, pathname);
- while (unlikely(!res)) { /* trailing symlink */
+ error = do_last(nd, &path, file, op, &opened, pathname);
+ while (unlikely(error > 0)) { /* trailing symlink */
struct path link = path;
void *cookie;
if (!(nd->flags & LOOKUP_FOLLOW)) {
path_put_conditional(&path, nd);
path_put(&nd->path);
- res = ERR_PTR(-ELOOP);
+ error = -ELOOP;
break;
}
nd->flags |= LOOKUP_PARENT;
nd->flags &= ~(LOOKUP_OPEN|LOOKUP_CREATE|LOOKUP_EXCL);
error = follow_link(&link, nd, &cookie);
if (unlikely(error))
- goto out_filp;
- res = do_last(nd, &path, file, op, &opened, pathname);
+ break;
+ error = do_last(nd, &path, file, op, &opened, pathname);
put_link(nd, &link, cookie);
}
out:
@@ -2709,19 +2698,20 @@ out:
path_put(&nd->root);
if (base)
fput(base);
- if (!(opened & FILE_OPENED))
+ if (!(opened & FILE_OPENED)) {
+ BUG_ON(!error);
put_filp(file);
- if (res == ERR_PTR(-EOPENSTALE)) {
- if (flags & LOOKUP_RCU)
- res = ERR_PTR(-ECHILD);
- else
- res = ERR_PTR(-ESTALE);
}
- return res;
-
-out_filp:
- res = ERR_PTR(error);
- goto out;
+ if (unlikely(error)) {
+ if (error == -EOPENSTALE) {
+ if (flags & LOOKUP_RCU)
+ error = -ECHILD;
+ else
+ error = -ESTALE;
+ }
+ file = ERR_PTR(error);
+ }
+ return file;
}
struct file *do_filp_open(int dfd, const char *pathname,
--
cgit v1.2.3-70-g09d2
From e45198a6ac24bd2c4ad4a43b670c2f1a23dd2df3 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 06:48:09 -0400
Subject: make finish_no_open() return int
namely, 1 ;-) That's what we want to return from ->atomic_open()
instances after finish_no_open().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/9p/vfs_inode.c | 6 ++----
fs/9p/vfs_inode_dotl.c | 6 ++----
fs/ceph/dir.c | 6 ++----
fs/cifs/dir.c | 3 +--
fs/fuse/dir.c | 3 +--
fs/nfs/dir.c | 3 +--
fs/open.c | 3 ++-
include/linux/fs.h | 2 +-
8 files changed, 12 insertions(+), 20 deletions(-)
(limited to 'fs')
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 2b05651e0c3..eae476fb401 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -878,10 +878,8 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
}
/* Only creates */
- if (!(flags & O_CREAT) || dentry->d_inode) {
- finish_no_open(file, res);
- return 1;
- }
+ if (!(flags & O_CREAT) || dentry->d_inode)
+ return finish_no_open(file, res);
err = 0;
fid = NULL;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index cfaebdef974..1ee10c89df9 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -268,10 +268,8 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
}
/* Only creates */
- if (!(flags & O_CREAT) || dentry->d_inode) {
- finish_no_open(file, res);
- return 1;
- }
+ if (!(flags & O_CREAT) || dentry->d_inode)
+ return finish_no_open(file, res);
v9ses = v9fs_inode2v9ses(dir);
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 80c848e0539..d42eee1c5de 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -662,10 +662,8 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
}
/* We don't deal with positive dentries here */
- if (dentry->d_inode) {
- finish_no_open(file, res);
- return 1;
- }
+ if (dentry->d_inode)
+ return finish_no_open(file, res);
*opened |= FILE_CREATED;
err = ceph_lookup_open(dir, dentry, file, flags, mode, opened);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index c00c192f17e..e8c53c80dbd 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -405,8 +405,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if (IS_ERR(res))
return PTR_ERR(res);
- finish_no_open(file, res);
- return 1;
+ return finish_no_open(file, res);
}
rc = check_name(direntry);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 110db5425dc..ccdab3ac422 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -509,8 +509,7 @@ mknod:
if (err)
goto out_dput;
no_open:
- finish_no_open(file, res);
- return 1;
+ return finish_no_open(file, res);
}
/*
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index dafc86c1c35..f167c7a1d67 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1505,8 +1505,7 @@ no_open:
if (IS_ERR(res))
goto out;
- finish_no_open(file, res);
- return 1;
+ return finish_no_open(file, res);
}
static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
diff --git a/fs/open.c b/fs/open.c
index fc829d6c3a4..d51c1b71b06 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -810,9 +810,10 @@ EXPORT_SYMBOL(finish_open);
* This can be used to set the result of a successful lookup in ->atomic_open().
* The filesystem's atomic_open() method shall return NULL after calling this.
*/
-void finish_no_open(struct file *file, struct dentry *dentry)
+int finish_no_open(struct file *file, struct dentry *dentry)
{
file->f_path.dentry = dentry;
+ return 1;
}
EXPORT_SYMBOL(finish_no_open);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1dcc75c9576..17ee20dba86 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2071,7 +2071,7 @@ enum {
extern int finish_open(struct file *file, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened);
-extern void finish_no_open(struct file *file, struct dentry *dentry);
+extern int finish_no_open(struct file *file, struct dentry *dentry);
/* fs/ioctl.c */
--
cgit v1.2.3-70-g09d2
From 96b7e579addd3cdc806c1667bf5b6b126070827c Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 14:22:04 -0400
Subject: switch do_dentry_open() to returning int
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/open.c | 40 ++++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 20 deletions(-)
(limited to 'fs')
diff --git a/fs/open.c b/fs/open.c
index d51c1b71b06..1241c597d31 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -667,10 +667,10 @@ int open_check_o_direct(struct file *f)
return 0;
}
-static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
- struct file *f,
- int (*open)(struct inode *, struct file *),
- const struct cred *cred)
+static int do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
+ struct file *f,
+ int (*open)(struct inode *, struct file *),
+ const struct cred *cred)
{
static const struct file_operations empty_fops = {};
struct inode *inode;
@@ -699,7 +699,7 @@ static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
if (unlikely(f->f_mode & FMODE_PATH)) {
f->f_op = &empty_fops;
- return f;
+ return 0;
}
f->f_op = fops_get(inode->i_fop);
@@ -726,7 +726,7 @@ static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping);
- return f;
+ return 0;
cleanup_all:
fops_put(f->f_op);
@@ -749,7 +749,7 @@ cleanup_all:
cleanup_file:
dput(dentry);
mntput(mnt);
- return ERR_PTR(error);
+ return error;
}
static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
@@ -757,17 +757,19 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
int (*open)(struct inode *, struct file *),
const struct cred *cred)
{
- struct file *res = do_dentry_open(dentry, mnt, f, open, cred);
- if (!IS_ERR(res)) {
- int error = open_check_o_direct(f);
+ int error;
+ error = do_dentry_open(dentry, mnt, f, open, cred);
+ if (!error) {
+ error = open_check_o_direct(f);
if (error) {
- fput(res);
- res = ERR_PTR(error);
+ fput(f);
+ f = ERR_PTR(error);
}
- } else {
+ } else {
put_filp(f);
+ f = ERR_PTR(error);
}
- return res;
+ return f;
}
/**
@@ -785,19 +787,17 @@ int finish_open(struct file *file, struct dentry *dentry,
int (*open)(struct inode *, struct file *),
int *opened)
{
- struct file *res;
+ int error;
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
mntget(file->f_path.mnt);
dget(dentry);
- res = do_dentry_open(dentry, file->f_path.mnt, file, open, current_cred());
- if (!IS_ERR(res)) {
+ error = do_dentry_open(dentry, file->f_path.mnt, file, open, current_cred());
+ if (!error)
*opened |= FILE_OPENED;
- return 0;
- }
- return PTR_ERR(res);
+ return error;
}
EXPORT_SYMBOL(finish_open);
--
cgit v1.2.3-70-g09d2
From 2a027e7a1873812240cbdac0f55c4734ff0042a5 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 14:24:38 -0400
Subject: fold __dentry_open() into its sole caller
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/open.c | 33 ++++++++++++---------------------
1 file changed, 12 insertions(+), 21 deletions(-)
(limited to 'fs')
diff --git a/fs/open.c b/fs/open.c
index 1241c597d31..28fbacbd5e3 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -752,26 +752,6 @@ cleanup_file:
return error;
}
-static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
- struct file *f,
- int (*open)(struct inode *, struct file *),
- const struct cred *cred)
-{
- int error;
- error = do_dentry_open(dentry, mnt, f, open, cred);
- if (!error) {
- error = open_check_o_direct(f);
- if (error) {
- fput(f);
- f = ERR_PTR(error);
- }
- } else {
- put_filp(f);
- f = ERR_PTR(error);
- }
- return f;
-}
-
/**
* finish_open - finish opening a file
* @od: opaque open data
@@ -841,7 +821,18 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
}
f->f_flags = flags;
- return __dentry_open(dentry, mnt, f, NULL, cred);
+ error = do_dentry_open(dentry, mnt, f, NULL, cred);
+ if (!error) {
+ error = open_check_o_direct(f);
+ if (error) {
+ fput(f);
+ f = ERR_PTR(error);
+ }
+ } else {
+ put_filp(f);
+ f = ERR_PTR(error);
+ }
+ return f;
}
EXPORT_SYMBOL(dentry_open);
--
cgit v1.2.3-70-g09d2
From 02e5180d991f203441687cecd0b7e6a2ba0a34d3 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 14:32:45 -0400
Subject: do_dentry_open(): take initialization of file->f_path to caller
... and get rid of a couple of arguments and a pointless reassignment
in finish_open() case.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/open.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
(limited to 'fs')
diff --git a/fs/open.c b/fs/open.c
index 28fbacbd5e3..124ccb1d38a 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -667,8 +667,7 @@ int open_check_o_direct(struct file *f)
return 0;
}
-static int do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
- struct file *f,
+static int do_dentry_open(struct file *f,
int (*open)(struct inode *, struct file *),
const struct cred *cred)
{
@@ -682,9 +681,9 @@ static int do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
if (unlikely(f->f_flags & O_PATH))
f->f_mode = FMODE_PATH;
- inode = dentry->d_inode;
+ inode = f->f_path.dentry->d_inode;
if (f->f_mode & FMODE_WRITE) {
- error = __get_file_write_access(inode, mnt);
+ error = __get_file_write_access(inode, f->f_path.mnt);
if (error)
goto cleanup_file;
if (!special_file(inode->i_mode))
@@ -692,8 +691,6 @@ static int do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
}
f->f_mapping = inode->i_mapping;
- f->f_path.dentry = dentry;
- f->f_path.mnt = mnt;
f->f_pos = 0;
file_sb_list_add(f, inode->i_sb);
@@ -740,15 +737,14 @@ cleanup_all:
* here, so just reset the state.
*/
file_reset_write(f);
- mnt_drop_write(mnt);
+ mnt_drop_write(f->f_path.mnt);
}
}
file_sb_list_del(f);
- f->f_path.dentry = NULL;
- f->f_path.mnt = NULL;
cleanup_file:
- dput(dentry);
- mntput(mnt);
+ path_put(&f->f_path);
+ f->f_path.mnt = NULL;
+ f->f_path.dentry = NULL;
return error;
}
@@ -771,9 +767,9 @@ int finish_open(struct file *file, struct dentry *dentry,
BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
mntget(file->f_path.mnt);
- dget(dentry);
+ file->f_path.dentry = dget(dentry);
- error = do_dentry_open(dentry, file->f_path.mnt, file, open, current_cred());
+ error = do_dentry_open(file, open, current_cred());
if (!error)
*opened |= FILE_OPENED;
@@ -821,7 +817,9 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
}
f->f_flags = flags;
- error = do_dentry_open(dentry, mnt, f, NULL, cred);
+ f->f_path.mnt = mnt;
+ f->f_path.dentry = dentry;
+ error = do_dentry_open(f, NULL, cred);
if (!error) {
error = open_check_o_direct(f);
if (error) {
--
cgit v1.2.3-70-g09d2
From 93420b40bb19433c3bc01c37c6c908ae7ce13228 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 15:18:15 -0400
Subject: switch nfs_lookup_check_intent() away from nameidata
just pass the flags
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/dir.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
(limited to 'fs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index f167c7a1d67..48485f1f0bd 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1037,10 +1037,10 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
* component of the path and none of them is set before that last
* component.
*/
-static inline unsigned int nfs_lookup_check_intent(struct nameidata *nd,
+static inline unsigned int nfs_lookup_check_intent(unsigned int flags,
unsigned int mask)
{
- return nd->flags & mask;
+ return flags & mask;
}
/*
@@ -1051,7 +1051,7 @@ static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
{
if (NFS_PROTO(dir)->version == 2)
return 0;
- return nd && nfs_lookup_check_intent(nd, LOOKUP_EXCL);
+ return nd && nfs_lookup_check_intent(nd->flags, LOOKUP_EXCL);
}
/*
@@ -1074,7 +1074,7 @@ int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
if (nd->flags & LOOKUP_REVAL)
goto out_force;
/* This is an open(2) */
- if (nfs_lookup_check_intent(nd, LOOKUP_OPEN) != 0 &&
+ if (nfs_lookup_check_intent(nd->flags, LOOKUP_OPEN) != 0 &&
!(server->flags & NFS_MOUNT_NOCTO) &&
(S_ISREG(inode->i_mode) ||
S_ISDIR(inode->i_mode)))
@@ -1098,7 +1098,7 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
/* Don't revalidate a negative dentry if we're creating a new file */
- if (nd != NULL && nfs_lookup_check_intent(nd, LOOKUP_CREATE) != 0)
+ if (nd != NULL && nfs_lookup_check_intent(nd->flags, LOOKUP_CREATE) != 0)
return 0;
if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG)
return 1;
--
cgit v1.2.3-70-g09d2
From facc3530fb5c89a40bc83045422add392b8db4a1 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 15:33:51 -0400
Subject: nfs_lookup_verify_inode() - nd is *always* non-NULL here
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/dir.c | 23 ++++++++++-------------
1 file changed, 10 insertions(+), 13 deletions(-)
(limited to 'fs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 48485f1f0bd..ad5aef4995a 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1069,19 +1069,16 @@ int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
if (IS_AUTOMOUNT(inode))
return 0;
- if (nd != NULL) {
- /* VFS wants an on-the-wire revalidation */
- if (nd->flags & LOOKUP_REVAL)
- goto out_force;
- /* This is an open(2) */
- if (nfs_lookup_check_intent(nd->flags, LOOKUP_OPEN) != 0 &&
- !(server->flags & NFS_MOUNT_NOCTO) &&
- (S_ISREG(inode->i_mode) ||
- S_ISDIR(inode->i_mode)))
- goto out_force;
- return 0;
- }
- return nfs_revalidate_inode(server, inode);
+ /* VFS wants an on-the-wire revalidation */
+ if (nd->flags & LOOKUP_REVAL)
+ goto out_force;
+ /* This is an open(2) */
+ if (nfs_lookup_check_intent(nd->flags, LOOKUP_OPEN) != 0 &&
+ !(server->flags & NFS_MOUNT_NOCTO) &&
+ (S_ISREG(inode->i_mode) ||
+ S_ISDIR(inode->i_mode)))
+ goto out_force;
+ return 0;
out_force:
return __nfs_revalidate_inode(server, inode);
}
--
cgit v1.2.3-70-g09d2
From fa3c56bbda6c2ac2a57d96ba501dbe85cccd312b Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 15:36:40 -0400
Subject: fs/nfs/dir.c: switch to passing nd->flags instead of nd wherever
possible
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/dir.c | 51 +++++++++++++++++++--------------------------------
1 file changed, 19 insertions(+), 32 deletions(-)
(limited to 'fs')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ad5aef4995a..71a199435ca 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1030,28 +1030,15 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
return 1;
}
-/*
- * Return the intent data that applies to this particular path component
- *
- * Note that the current set of intents only apply to the very last
- * component of the path and none of them is set before that last
- * component.
- */
-static inline unsigned int nfs_lookup_check_intent(unsigned int flags,
- unsigned int mask)
-{
- return flags & mask;
-}
-
/*
* Use intent information to check whether or not we're going to do
* an O_EXCL create using this path component.
*/
-static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
+static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags)
{
if (NFS_PROTO(dir)->version == 2)
return 0;
- return nd && nfs_lookup_check_intent(nd->flags, LOOKUP_EXCL);
+ return flags & LOOKUP_EXCL;
}
/*
@@ -1063,20 +1050,18 @@ static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
*
*/
static inline
-int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
+int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
{
struct nfs_server *server = NFS_SERVER(inode);
if (IS_AUTOMOUNT(inode))
return 0;
/* VFS wants an on-the-wire revalidation */
- if (nd->flags & LOOKUP_REVAL)
+ if (flags & LOOKUP_REVAL)
goto out_force;
/* This is an open(2) */
- if (nfs_lookup_check_intent(nd->flags, LOOKUP_OPEN) != 0 &&
- !(server->flags & NFS_MOUNT_NOCTO) &&
- (S_ISREG(inode->i_mode) ||
- S_ISDIR(inode->i_mode)))
+ if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) &&
+ (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
goto out_force;
return 0;
out_force:
@@ -1092,10 +1077,10 @@ out_force:
*/
static inline
int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
/* Don't revalidate a negative dentry if we're creating a new file */
- if (nd != NULL && nfs_lookup_check_intent(nd->flags, LOOKUP_CREATE) != 0)
+ if (flags & LOOKUP_CREATE)
return 0;
if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG)
return 1;
@@ -1115,6 +1100,7 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
*/
static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
{
+ unsigned int flags = nd->flags;
struct inode *dir;
struct inode *inode;
struct dentry *parent;
@@ -1122,7 +1108,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
struct nfs_fattr *fattr = NULL;
int error;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);
@@ -1131,7 +1117,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
inode = dentry->d_inode;
if (!inode) {
- if (nfs_neg_need_reval(dir, dentry, nd))
+ if (nfs_neg_need_reval(dir, dentry, flags))
goto out_bad;
goto out_valid_noent;
}
@@ -1147,8 +1133,8 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
goto out_set_verifier;
/* Force a full look up iff the parent directory has changed */
- if (!nfs_is_exclusive_create(dir, nd) && nfs_check_verifier(dir, dentry)) {
- if (nfs_lookup_verify_inode(inode, nd))
+ if (!nfs_is_exclusive_create(dir, flags) && nfs_check_verifier(dir, dentry)) {
+ if (nfs_lookup_verify_inode(inode, flags))
goto out_zap_parent;
goto out_valid;
}
@@ -1306,7 +1292,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
* If we're doing an exclusive create, optimize away the lookup
* but don't hash the dentry.
*/
- if (nfs_is_exclusive_create(dir, nd)) {
+ if (nd && nfs_is_exclusive_create(dir, nd->flags)) {
d_instantiate(dentry, NULL);
res = NULL;
goto out;
@@ -1507,15 +1493,16 @@ no_open:
static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
{
+ unsigned int flags = nd->flags;
struct dentry *parent = NULL;
struct inode *inode;
struct inode *dir;
int ret = 0;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
- if (!(nd->flags & LOOKUP_OPEN) || (nd->flags & LOOKUP_DIRECTORY))
+ if (!(flags & LOOKUP_OPEN) || (flags & LOOKUP_DIRECTORY))
goto no_open;
if (d_mountpoint(dentry))
goto no_open;
@@ -1528,7 +1515,7 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
* optimize away revalidation of negative dentries.
*/
if (inode == NULL) {
- if (!nfs_neg_need_reval(dir, dentry, nd))
+ if (!nfs_neg_need_reval(dir, dentry, flags))
ret = 1;
goto out;
}
@@ -1537,7 +1524,7 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
if (!S_ISREG(inode->i_mode))
goto no_open_dput;
/* We cannot do exclusive creation on a positive dentry */
- if (nd && nd->flags & LOOKUP_EXCL)
+ if (flags & LOOKUP_EXCL)
goto no_open_dput;
/* Let f_op->open() actually open (and revalidate) the file */
--
cgit v1.2.3-70-g09d2
From 0b728e1911cbe6e24020727c3870628b9653f32a Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 16:03:43 -0400
Subject: stop passing nameidata * to ->d_revalidate()
Just the lookup flags. Die, bastard, die...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/porting | 5 +++++
Documentation/filesystems/vfs.txt | 8 ++++----
fs/9p/vfs_dentry.c | 4 ++--
fs/afs/dir.c | 6 +++---
fs/ceph/dir.c | 6 +++---
fs/cifs/dir.c | 8 ++++----
fs/coda/dir.c | 6 +++---
fs/ecryptfs/dentry.c | 20 ++++----------------
fs/fat/namei_vfat.c | 12 ++++++------
fs/fuse/dir.c | 4 ++--
fs/gfs2/dentry.c | 6 +++---
fs/hfs/sysdep.c | 4 ++--
fs/jfs/namei.c | 6 +++---
fs/namei.c | 2 +-
fs/ncpfs/dir.c | 6 +++---
fs/nfs/dir.c | 10 ++++------
fs/ocfs2/dcache.c | 5 ++---
fs/proc/base.c | 22 +++++++++++-----------
fs/proc/internal.h | 2 +-
fs/proc/namespaces.c | 2 +-
fs/proc/proc_sysctl.c | 4 ++--
fs/reiserfs/xattr.c | 2 +-
fs/sysfs/dir.c | 4 ++--
include/linux/dcache.h | 2 +-
25 files changed, 74 insertions(+), 84 deletions(-)
(limited to 'fs')
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 33e5243948f..52a057367f6 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -9,7 +9,7 @@ be able to use diff(1).
--------------------------- dentry_operations --------------------------
prototypes:
- int (*d_revalidate)(struct dentry *, struct nameidata *);
+ int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, const struct inode *,
struct qstr *);
int (*d_compare)(const struct dentry *, const struct inode *,
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index ed9fbc23ece..56750b714d1 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -431,3 +431,8 @@ release it yourself.
d_alloc_root() is gone, along with a lot of bugs caused by code
misusing it. Replacement: d_make_root(inode). The difference is,
d_make_root() drops the reference to inode if dentry allocation fails.
+
+--
+[mandatory]
+ The witch is dead! Well, 1/3 of it, anyway. ->d_revalidate() does *not*
+take struct nameidata anymore; just the flags.
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 279de219036..b9a406b2ed0 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -902,7 +902,7 @@ the VFS uses a default. As of kernel 2.6.22, the following members are
defined:
struct dentry_operations {
- int (*d_revalidate)(struct dentry *, struct nameidata *);
+ int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, const struct inode *,
struct qstr *);
int (*d_compare)(const struct dentry *, const struct inode *,
@@ -921,11 +921,11 @@ struct dentry_operations {
dcache. Most filesystems leave this as NULL, because all their
dentries in the dcache are valid
- d_revalidate may be called in rcu-walk mode (nd->flags & LOOKUP_RCU).
+ d_revalidate may be called in rcu-walk mode (flags & LOOKUP_RCU).
If in rcu-walk mode, the filesystem must revalidate the dentry without
blocking or storing to the dentry, d_parent and d_inode should not be
- used without care (because they can go NULL), instead nd->inode should
- be used.
+ used without care (because they can change and, in d_inode case, even
+ become NULL under us).
If a situation is encountered that rcu-walk cannot handle, return
-ECHILD and it will be called again in ref-walk mode.
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index d529437ff44..64600b5d052 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -100,13 +100,13 @@ static void v9fs_dentry_release(struct dentry *dentry)
}
}
-static int v9fs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
{
struct p9_fid *fid;
struct inode *inode;
struct v9fs_inode *v9inode;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index e22dc4b4a50..65c54ab0473 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -23,7 +23,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd);
static int afs_dir_open(struct inode *inode, struct file *file);
static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
-static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd);
+static int afs_d_revalidate(struct dentry *dentry, unsigned int flags);
static int afs_d_delete(const struct dentry *dentry);
static void afs_d_release(struct dentry *dentry);
static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
@@ -598,7 +598,7 @@ success:
* - NOTE! the hit can be a negative hit too, so we can't assume we have an
* inode
*/
-static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct afs_vnode *vnode, *dir;
struct afs_fid uninitialized_var(fid);
@@ -607,7 +607,7 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
void *dir_version;
int ret;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
vnode = AFS_FS_I(dentry->d_inode);
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index d42eee1c5de..8898eef8bca 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1042,12 +1042,12 @@ static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
/*
* Check if cached dentry can be trusted.
*/
-static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
{
int valid = 0;
struct inode *dir;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
dout("d_revalidate %p '%.*s' inode %p offset %lld\n", dentry,
@@ -1094,7 +1094,7 @@ static void ceph_d_release(struct dentry *dentry)
}
static int ceph_snapdir_d_revalidate(struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
/*
* Eventually, we'll want to revalidate snapped metadata
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index e8c53c80dbd..b97ff48b7df 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -700,9 +700,9 @@ lookup_out:
}
static int
-cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
+cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
{
- if (nd && (nd->flags & LOOKUP_RCU))
+ if (flags & LOOKUP_RCU)
return -ECHILD;
if (direntry->d_inode) {
@@ -731,7 +731,7 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
* This may be nfsd (or something), anyway, we can't see the
* intent of this. So, since this can be for creation, drop it.
*/
- if (!nd)
+ if (!flags)
return 0;
/*
@@ -739,7 +739,7 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
* case sensitive name which is specified by user if this is
* for creation.
*/
- if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+ if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
return 0;
if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled)
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 17751582906..7f8f1a7c6d8 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -46,7 +46,7 @@ static int coda_rename(struct inode *old_inode, struct dentry *old_dentry,
static int coda_readdir(struct file *file, void *buf, filldir_t filldir);
/* dentry ops */
-static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd);
+static int coda_dentry_revalidate(struct dentry *de, unsigned int flags);
static int coda_dentry_delete(const struct dentry *);
/* support routines */
@@ -536,12 +536,12 @@ out:
}
/* called when a cache lookup succeeds */
-static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
+static int coda_dentry_revalidate(struct dentry *de, unsigned int flags)
{
struct inode *inode;
struct coda_inode_info *cii;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = de->d_inode;
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 534c1d46e69..1b5d9af937d 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -32,7 +32,7 @@
/**
* ecryptfs_d_revalidate - revalidate an ecryptfs dentry
* @dentry: The ecryptfs dentry
- * @nd: The associated nameidata
+ * @flags: lookup flags
*
* Called when the VFS needs to revalidate a dentry. This
* is called whenever a name lookup finds a dentry in the
@@ -42,32 +42,20 @@
* Returns 1 if valid, 0 otherwise.
*
*/
-static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int ecryptfs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct dentry *lower_dentry;
struct vfsmount *lower_mnt;
- struct dentry *dentry_save = NULL;
- struct vfsmount *vfsmount_save = NULL;
int rc = 1;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
lower_dentry = ecryptfs_dentry_to_lower(dentry);
lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
goto out;
- if (nd) {
- dentry_save = nd->path.dentry;
- vfsmount_save = nd->path.mnt;
- nd->path.dentry = lower_dentry;
- nd->path.mnt = lower_mnt;
- }
- rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd);
- if (nd) {
- nd->path.dentry = dentry_save;
- nd->path.mnt = vfsmount_save;
- }
+ rc = lower_dentry->d_op->d_revalidate(lower_dentry, flags);
if (dentry->d_inode) {
struct inode *lower_inode =
ecryptfs_inode_to_lower(dentry->d_inode);
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 98ae804f527..0bbdf399006 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -41,9 +41,9 @@ static int vfat_revalidate_shortname(struct dentry *dentry)
return ret;
}
-static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int vfat_revalidate(struct dentry *dentry, unsigned int flags)
{
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
/* This is not negative dentry. Always valid. */
@@ -52,9 +52,9 @@ static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
return vfat_revalidate_shortname(dentry);
}
-static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
+static int vfat_revalidate_ci(struct dentry *dentry, unsigned int flags)
{
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
/*
@@ -74,7 +74,7 @@ static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
* This may be nfsd (or something), anyway, we can't see the
* intent of this. So, since this can be for creation, drop it.
*/
- if (!nd)
+ if (!flags)
return 0;
/*
@@ -82,7 +82,7 @@ static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
* case sensitive name which is specified by user if this is
* for creation.
*/
- if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+ if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
return 0;
return vfat_revalidate_shortname(dentry);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index ccdab3ac422..eba30bd9ba2 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -154,7 +154,7 @@ u64 fuse_get_attr_version(struct fuse_conn *fc)
* the lookup once more. If the lookup results in the same inode,
* then refresh the attributes, timeouts and mark the dentry valid.
*/
-static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
+static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
{
struct inode *inode;
@@ -174,7 +174,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
if (!inode)
return 0;
- if (nd && (nd->flags & LOOKUP_RCU))
+ if (flags & LOOKUP_RCU)
return -ECHILD;
fc = get_fuse_conn(inode);
diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c
index 0da8da2c991..4fddb3c22d2 100644
--- a/fs/gfs2/dentry.c
+++ b/fs/gfs2/dentry.c
@@ -25,7 +25,7 @@
/**
* gfs2_drevalidate - Check directory lookup consistency
* @dentry: the mapping to check
- * @nd:
+ * @flags: lookup flags
*
* Check to make sure the lookup necessary to arrive at this inode from its
* parent is still good.
@@ -33,7 +33,7 @@
* Returns: 1 if the dentry is ok, 0 if it isn't
*/
-static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
+static int gfs2_drevalidate(struct dentry *dentry, unsigned int flags)
{
struct dentry *parent;
struct gfs2_sbd *sdp;
@@ -44,7 +44,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
int error;
int had_lock = 0;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);
diff --git a/fs/hfs/sysdep.c b/fs/hfs/sysdep.c
index 19cf291eb91..91b91fd3a90 100644
--- a/fs/hfs/sysdep.c
+++ b/fs/hfs/sysdep.c
@@ -13,12 +13,12 @@
/* dentry case-handling: just lowercase everything */
-static int hfs_revalidate_dentry(struct dentry *dentry, struct nameidata *nd)
+static int hfs_revalidate_dentry(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
int diff;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 07c91ca6017..f37977fb087 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1570,7 +1570,7 @@ out:
return result;
}
-static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int jfs_ci_revalidate(struct dentry *dentry, unsigned int flags)
{
/*
* This is not negative dentry. Always valid.
@@ -1589,7 +1589,7 @@ static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
* This may be nfsd (or something), anyway, we can't see the
* intent of this. So, since this can be for creation, drop it.
*/
- if (!nd)
+ if (!flags)
return 0;
/*
@@ -1597,7 +1597,7 @@ static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
* case sensitive name which is specified by user if this is
* for creation.
*/
- if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+ if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
return 0;
return 1;
}
diff --git a/fs/namei.c b/fs/namei.c
index 16256d915cb..1a5707aaed3 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -465,7 +465,7 @@ err_root:
static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
- return dentry->d_op->d_revalidate(dentry, nd);
+ return dentry->d_op->d_revalidate(dentry, nd ? nd->flags : 0);
}
/**
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index aeed93a6bde..32607f74958 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -72,7 +72,7 @@ const struct inode_operations ncp_dir_inode_operations =
/*
* Dentry operations routines
*/
-static int ncp_lookup_validate(struct dentry *, struct nameidata *);
+static int ncp_lookup_validate(struct dentry *, unsigned int);
static int ncp_hash_dentry(const struct dentry *, const struct inode *,
struct qstr *);
static int ncp_compare_dentry(const struct dentry *, const struct inode *,
@@ -290,7 +290,7 @@ leave_me:;
static int
-ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd)
+ncp_lookup_validate(struct dentry *dentry, unsigned int flags)
{
struct ncp_server *server;
struct dentry *parent;
@@ -302,7 +302,7 @@ ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd)
if (dentry == dentry->d_sb->s_root)
return 1;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 71a199435ca..656f52e9aa2 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1098,9 +1098,8 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
* If the parent directory is seen to have changed, we throw out the
* cached dentry and do a new lookup.
*/
-static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
{
- unsigned int flags = nd->flags;
struct inode *dir;
struct inode *inode;
struct dentry *parent;
@@ -1339,7 +1338,7 @@ out:
}
#ifdef CONFIG_NFS_V4
-static int nfs4_lookup_revalidate(struct dentry *, struct nameidata *);
+static int nfs4_lookup_revalidate(struct dentry *, unsigned int);
const struct dentry_operations nfs4_dentry_operations = {
.d_revalidate = nfs4_lookup_revalidate,
@@ -1491,9 +1490,8 @@ no_open:
return finish_no_open(file, res);
}
-static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)
{
- unsigned int flags = nd->flags;
struct dentry *parent = NULL;
struct inode *inode;
struct inode *dir;
@@ -1537,7 +1535,7 @@ out:
no_open_dput:
dput(parent);
no_open:
- return nfs_lookup_revalidate(dentry, nd);
+ return nfs_lookup_revalidate(dentry, flags);
}
#endif /* CONFIG_NFSV4 */
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index af4488268e4..8db4b58b2e4 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -49,14 +49,13 @@ void ocfs2_dentry_attach_gen(struct dentry *dentry)
}
-static int ocfs2_dentry_revalidate(struct dentry *dentry,
- struct nameidata *nd)
+static int ocfs2_dentry_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
int ret = 0; /* if all else fails, just return false */
struct ocfs2_super *osb;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 437195f204e..bf749cca4cc 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1601,13 +1601,13 @@ int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
* made this apply to all per process world readable and executable
* directories.
*/
-int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
+int pid_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
const struct cred *cred;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
@@ -1781,7 +1781,7 @@ static int proc_fd_link(struct dentry *dentry, struct path *path)
return proc_fd_info(dentry->d_inode, path, NULL);
}
-static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
@@ -1789,7 +1789,7 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
struct files_struct *files;
const struct cred *cred;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
inode = dentry->d_inode;
@@ -1868,7 +1868,7 @@ static struct dentry *proc_fd_instantiate(struct inode *dir,
d_set_d_op(dentry, &tid_fd_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (tid_fd_revalidate(dentry, NULL))
+ if (tid_fd_revalidate(dentry, 0))
error = NULL;
out:
@@ -2003,7 +2003,7 @@ static int dname_to_vma_addr(struct dentry *dentry,
return 0;
}
-static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
{
unsigned long vm_start, vm_end;
bool exact_vma_exists = false;
@@ -2013,7 +2013,7 @@ static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
struct inode *inode;
int status = 0;
- if (nd && nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
if (!capable(CAP_SYS_ADMIN)) {
@@ -2371,7 +2371,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
d_set_d_op(dentry, &tid_fd_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (tid_fd_revalidate(dentry, NULL))
+ if (tid_fd_revalidate(dentry, 0))
error = NULL;
out:
@@ -2430,7 +2430,7 @@ static struct dentry *proc_pident_instantiate(struct inode *dir,
d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, NULL))
+ if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
@@ -3237,7 +3237,7 @@ static struct dentry *proc_pid_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, NULL))
+ if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
@@ -3508,7 +3508,7 @@ static struct dentry *proc_task_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, NULL))
+ if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index eca4aca5b6e..e0c2a48dab7 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -142,7 +142,7 @@ typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
const char *name, int len,
instantiate_t instantiate, struct task_struct *task, const void *ptr);
-int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
+int pid_revalidate(struct dentry *dentry, unsigned int flags);
struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
extern const struct dentry_operations pid_dentry_operations;
int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 0d9e23a39e4..40ceb40f985 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -56,7 +56,7 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, NULL))
+ if (pid_revalidate(dentry, 0))
error = NULL;
out:
return error;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 3476bca8f7a..fda69fa3909 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -794,9 +794,9 @@ static const struct inode_operations proc_sys_dir_operations = {
.getattr = proc_sys_getattr,
};
-static int proc_sys_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int proc_sys_revalidate(struct dentry *dentry, unsigned int flags)
{
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
return !PROC_I(dentry->d_inode)->sysctl->unregistering;
}
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 46fc1c20a6b..e6ad8d7dea6 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -942,7 +942,7 @@ int reiserfs_permission(struct inode *inode, int mask)
return generic_permission(inode, mask);
}
-static int xattr_hide_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int xattr_hide_revalidate(struct dentry *dentry, unsigned int flags)
{
return -EPERM;
}
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index e6bb9b2a4cb..038e74b3af8 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -303,12 +303,12 @@ static int sysfs_dentry_delete(const struct dentry *dentry)
return !!(sd->s_flags & SYSFS_FLAG_REMOVED);
}
-static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
{
struct sysfs_dirent *sd;
int is_dir;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
sd = dentry->d_fsdata;
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 8ca25551820..caa34e50537 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -144,7 +144,7 @@ enum dentry_d_lock_class
};
struct dentry_operations {
- int (*d_revalidate)(struct dentry *, struct nameidata *);
+ int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, const struct inode *,
struct qstr *);
int (*d_compare)(const struct dentry *, const struct inode *,
--
cgit v1.2.3-70-g09d2
From 4ce16ef3fed92c627b4b0136c02c85c81ee105e0 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 16:10:59 -0400
Subject: fs/namei.c: don't pass nameidata to d_revalidate()
since the method wrapped by it doesn't need that anymore...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 1a5707aaed3..91c637b6898 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -463,9 +463,9 @@ err_root:
return -ECHILD;
}
-static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static inline int d_revalidate(struct dentry *dentry, unsigned int flags)
{
- return dentry->d_op->d_revalidate(dentry, nd ? nd->flags : 0);
+ return dentry->d_op->d_revalidate(dentry, flags);
}
/**
@@ -511,7 +511,7 @@ static int complete_walk(struct nameidata *nd)
return 0;
/* Note: we do not d_invalidate() */
- status = d_revalidate(dentry, nd);
+ status = d_revalidate(dentry, nd->flags);
if (status > 0)
return 0;
@@ -1050,7 +1050,7 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
if (d_need_lookup(dentry)) {
*need_lookup = true;
} else if (dentry->d_flags & DCACHE_OP_REVALIDATE) {
- error = d_revalidate(dentry, nd);
+ error = d_revalidate(dentry, nd ? nd->flags : 0);
if (unlikely(error <= 0)) {
if (error < 0) {
dput(dentry);
@@ -1158,7 +1158,7 @@ static int lookup_fast(struct nameidata *nd, struct qstr *name,
if (unlikely(d_need_lookup(dentry)))
goto unlazy;
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
- status = d_revalidate(dentry, nd);
+ status = d_revalidate(dentry, nd->flags);
if (unlikely(status <= 0)) {
if (status != -ECHILD)
need_reval = 0;
@@ -1188,7 +1188,7 @@ unlazy:
}
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE) && need_reval)
- status = d_revalidate(dentry, nd);
+ status = d_revalidate(dentry, nd->flags);
if (unlikely(status <= 0)) {
if (status < 0) {
dput(dentry);
--
cgit v1.2.3-70-g09d2
From 201f956e43d4542723514e024d948011dd766d43 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 22 Jun 2012 12:42:10 +0400
Subject: fs/namei.c: don't pass namedata to lookup_dcache()
just the flags...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 91c637b6898..2e943ab04f3 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1039,7 +1039,7 @@ static void follow_dotdot(struct nameidata *nd)
* dir->d_inode->i_mutex must be held
*/
static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
- struct nameidata *nd, bool *need_lookup)
+ unsigned int flags, bool *need_lookup)
{
struct dentry *dentry;
int error;
@@ -1050,7 +1050,7 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
if (d_need_lookup(dentry)) {
*need_lookup = true;
} else if (dentry->d_flags & DCACHE_OP_REVALIDATE) {
- error = d_revalidate(dentry, nd ? nd->flags : 0);
+ error = d_revalidate(dentry, flags);
if (unlikely(error <= 0)) {
if (error < 0) {
dput(dentry);
@@ -1104,7 +1104,7 @@ static struct dentry *__lookup_hash(struct qstr *name,
bool need_lookup;
struct dentry *dentry;
- dentry = lookup_dcache(name, base, nd, &need_lookup);
+ dentry = lookup_dcache(name, base, nd ? nd->flags : 0, &need_lookup);
if (!need_lookup)
return dentry;
@@ -2356,7 +2356,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
bool need_lookup;
*opened &= ~FILE_CREATED;
- dentry = lookup_dcache(&nd->last, dir, nd, &need_lookup);
+ dentry = lookup_dcache(&nd->last, dir, nd->flags, &need_lookup);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
--
cgit v1.2.3-70-g09d2
From 00cd8dd3bf95f2cc8435b4cac01d9995635c6d0b Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 17:13:09 -0400
Subject: stop passing nameidata to ->lookup()
Just the flags; only NFS cares even about that, but there are
legitimate uses for such argument. And getting rid of that
completely would require splitting ->lookup() into a couple
of methods (at least), so let's leave that alone for now...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Documentation/filesystems/Locking | 3 +--
Documentation/filesystems/porting | 4 ++--
Documentation/filesystems/vfs.txt | 2 +-
fs/9p/v9fs.h | 2 +-
fs/9p/vfs_inode.c | 8 ++++----
fs/9p/vfs_inode_dotl.c | 2 +-
fs/adfs/dir.c | 2 +-
fs/affs/affs.h | 2 +-
fs/affs/namei.c | 2 +-
fs/afs/dir.c | 4 ++--
fs/afs/mntpt.c | 4 ++--
fs/autofs4/root.c | 4 ++--
fs/bad_inode.c | 2 +-
fs/befs/linuxvfs.c | 4 ++--
fs/bfs/dir.c | 2 +-
fs/btrfs/inode.c | 2 +-
fs/ceph/dir.c | 6 +++---
fs/cifs/cifsfs.h | 2 +-
fs/cifs/dir.c | 4 ++--
fs/coda/dir.c | 4 ++--
fs/configfs/dir.c | 2 +-
fs/cramfs/inode.c | 2 +-
fs/ecryptfs/inode.c | 2 +-
fs/efs/efs.h | 2 +-
fs/efs/namei.c | 3 ++-
fs/exofs/namei.c | 2 +-
fs/ext2/namei.c | 2 +-
fs/ext3/namei.c | 2 +-
fs/ext4/namei.c | 2 +-
fs/fat/namei_msdos.c | 2 +-
fs/fat/namei_vfat.c | 2 +-
fs/freevxfs/vxfs_lookup.c | 4 ++--
fs/fuse/dir.c | 4 ++--
fs/gfs2/inode.c | 2 +-
fs/hfs/dir.c | 2 +-
fs/hfs/inode.c | 2 +-
fs/hfsplus/dir.c | 2 +-
fs/hfsplus/inode.c | 2 +-
fs/hostfs/hostfs_kern.c | 2 +-
fs/hpfs/dir.c | 2 +-
fs/hpfs/hpfs_fn.h | 2 +-
fs/hppfs/hppfs.c | 2 +-
fs/isofs/isofs.h | 2 +-
fs/isofs/namei.c | 2 +-
fs/jffs2/dir.c | 4 ++--
fs/jfs/namei.c | 2 +-
fs/libfs.c | 2 +-
fs/logfs/dir.c | 2 +-
fs/minix/namei.c | 2 +-
fs/namei.c | 2 +-
fs/ncpfs/dir.c | 4 ++--
fs/nfs/dir.c | 8 ++++----
fs/nilfs2/namei.c | 2 +-
fs/ntfs/namei.c | 2 +-
fs/ocfs2/namei.c | 2 +-
fs/omfs/dir.c | 2 +-
fs/openpromfs/inode.c | 4 ++--
fs/proc/base.c | 18 ++++++++++--------
fs/proc/generic.c | 2 +-
fs/proc/internal.h | 4 ++--
fs/proc/namespaces.c | 2 +-
fs/proc/proc_net.c | 2 +-
fs/proc/proc_sysctl.c | 2 +-
fs/proc/root.c | 7 +++----
fs/qnx4/namei.c | 2 +-
fs/qnx4/qnx4.h | 2 +-
fs/qnx6/namei.c | 2 +-
fs/qnx6/qnx6.h | 2 +-
fs/reiserfs/namei.c | 2 +-
fs/romfs/super.c | 2 +-
fs/squashfs/namei.c | 2 +-
fs/sysfs/dir.c | 2 +-
fs/sysv/namei.c | 2 +-
fs/ubifs/dir.c | 2 +-
fs/udf/namei.c | 2 +-
fs/ufs/namei.c | 2 +-
fs/xfs/xfs_iops.c | 4 ++--
include/linux/fs.h | 4 ++--
kernel/cgroup.c | 4 ++--
79 files changed, 115 insertions(+), 114 deletions(-)
(limited to 'fs')
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 52a057367f6..33f2c8f1db8 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -38,8 +38,7 @@ d_manage: no no yes (ref-walk) maybe
--------------------------- inode_operations ---------------------------
prototypes:
int (*create) (struct inode *,struct dentry *,umode_t, struct nameidata *);
- struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameid
-ata *);
+ struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
int (*link) (struct dentry *,struct inode *,struct dentry *);
int (*unlink) (struct inode *,struct dentry *);
int (*symlink) (struct inode *,struct dentry *,const char *);
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 56750b714d1..690f573928b 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -434,5 +434,5 @@ d_make_root() drops the reference to inode if dentry allocation fails.
--
[mandatory]
- The witch is dead! Well, 1/3 of it, anyway. ->d_revalidate() does *not*
-take struct nameidata anymore; just the flags.
+ The witch is dead! Well, 2/3 of it, anyway. ->d_revalidate() and
+->lookup() do *not* take struct nameidata anymore; just the flags.
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index b9a406b2ed0..ee786354946 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -342,7 +342,7 @@ filesystem. As of kernel 2.6.22, the following members are defined:
struct inode_operations {
int (*create) (struct inode *,struct dentry *, umode_t, struct nameidata *);
- struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
+ struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
int (*link) (struct dentry *,struct inode *,struct dentry *);
int (*unlink) (struct inode *,struct dentry *);
int (*symlink) (struct inode *,struct dentry *,const char *);
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index e78956cbd70..34c59f14a1c 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -144,7 +144,7 @@ extern void v9fs_session_close(struct v9fs_session_info *v9ses);
extern void v9fs_session_cancel(struct v9fs_session_info *v9ses);
extern void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses);
extern struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nameidata);
+ unsigned int flags);
extern int v9fs_vfs_unlink(struct inode *i, struct dentry *d);
extern int v9fs_vfs_rmdir(struct inode *i, struct dentry *d);
extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index eae476fb401..bb0d7627f95 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -785,7 +785,7 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
*/
struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nameidata)
+ unsigned int flags)
{
struct dentry *res;
struct super_block *sb;
@@ -795,8 +795,8 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
char *name;
int result = 0;
- p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
- dir, dentry->d_name.name, dentry, nameidata);
+ p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n",
+ dir, dentry->d_name.name, dentry, flags);
if (dentry->d_name.len > NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
@@ -869,7 +869,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct dentry *res = NULL;
if (d_unhashed(dentry)) {
- res = v9fs_vfs_lookup(dir, dentry, NULL);
+ res = v9fs_vfs_lookup(dir, dentry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 1ee10c89df9..b97619fed19 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -259,7 +259,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
struct dentry *res = NULL;
if (d_unhashed(dentry)) {
- res = v9fs_vfs_lookup(dir, dentry, NULL);
+ res = v9fs_vfs_lookup(dir, dentry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index 3d83075aaa2..b3be2e7c564 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -266,7 +266,7 @@ const struct dentry_operations adfs_dentry_operations = {
};
static struct dentry *
-adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+adfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct inode *inode = NULL;
struct object_info obj;
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 3a130e27eb1..49e4e3457bf 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -153,7 +153,7 @@ extern void affs_free_bitmap(struct super_block *sb);
/* namei.c */
extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
-extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *);
+extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
extern int affs_unlink(struct inode *dir, struct dentry *dentry);
extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *);
extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 47806940aac..7f9721be709 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -211,7 +211,7 @@ affs_find_entry(struct inode *dir, struct dentry *dentry)
}
struct dentry *
-affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct super_block *sb = dir->i_sb;
struct buffer_head *bh;
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 65c54ab0473..ffb33e36ea7 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -20,7 +20,7 @@
#include "internal.h"
static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd);
+ unsigned int flags);
static int afs_dir_open(struct inode *inode, struct file *file);
static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
static int afs_d_revalidate(struct dentry *dentry, unsigned int flags);
@@ -516,7 +516,7 @@ out:
* look up an entry in a directory
*/
static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct afs_vnode *vnode;
struct afs_fid fid;
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index 298cf8919ec..9682c33d5da 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -22,7 +22,7 @@
static struct dentry *afs_mntpt_lookup(struct inode *dir,
struct dentry *dentry,
- struct nameidata *nd);
+ unsigned int flags);
static int afs_mntpt_open(struct inode *inode, struct file *file);
static void afs_mntpt_expiry_timed_out(struct work_struct *work);
@@ -104,7 +104,7 @@ out:
*/
static struct dentry *afs_mntpt_lookup(struct inode *dir,
struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
_enter("%p,%p{%p{%s},%s}",
dir,
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 75e5f1c8e02..e7396cfdb10 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -32,7 +32,7 @@ static long autofs4_root_ioctl(struct file *,unsigned int,unsigned long);
static long autofs4_root_compat_ioctl(struct file *,unsigned int,unsigned long);
#endif
static int autofs4_dir_open(struct inode *inode, struct file *file);
-static struct dentry *autofs4_lookup(struct inode *,struct dentry *, struct nameidata *);
+static struct dentry *autofs4_lookup(struct inode *,struct dentry *, unsigned int);
static struct vfsmount *autofs4_d_automount(struct path *);
static int autofs4_d_manage(struct dentry *, bool);
static void autofs4_dentry_release(struct dentry *);
@@ -458,7 +458,7 @@ int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
}
/* Lookups in the root directory */
-static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct autofs_sb_info *sbi;
struct autofs_info *ino;
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 1b35d6bd06b..d27e73c69ba 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -179,7 +179,7 @@ static int bad_inode_create (struct inode *dir, struct dentry *dentry,
}
static struct dentry *bad_inode_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
return ERR_PTR(-EIO);
}
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index e18da23d42b..cf7f3c67c8b 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -34,7 +34,7 @@ static int befs_readdir(struct file *, void *, filldir_t);
static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int);
static int befs_readpage(struct file *file, struct page *page);
static sector_t befs_bmap(struct address_space *mapping, sector_t block);
-static struct dentry *befs_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *befs_lookup(struct inode *, struct dentry *, unsigned int);
static struct inode *befs_iget(struct super_block *, unsigned long);
static struct inode *befs_alloc_inode(struct super_block *sb);
static void befs_destroy_inode(struct inode *inode);
@@ -159,7 +159,7 @@ befs_get_block(struct inode *inode, sector_t block,
}
static struct dentry *
-befs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct inode *inode = NULL;
struct super_block *sb = dir->i_sb;
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index d12c7966db2..3f1cd3b7168 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -133,7 +133,7 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
}
static struct dentry *bfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode = NULL;
struct buffer_head *bh;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a101572f1ce..e5f1f81b2d6 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4247,7 +4247,7 @@ static void btrfs_dentry_release(struct dentry *dentry)
}
static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct dentry *ret;
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 8898eef8bca..74b2f3c54fe 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -576,7 +576,7 @@ static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry)
* the MDS so that it gets our 'caps wanted' value in a single op.
*/
static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -653,7 +653,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
}
if (d_unhashed(dentry)) {
- res = ceph_lookup(dir, dentry, NULL);
+ res = ceph_lookup(dir, dentry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
@@ -678,7 +678,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
*/
int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry)
{
- struct dentry *result = ceph_lookup(dir, dentry, NULL);
+ struct dentry *result = ceph_lookup(dir, dentry, 0);
if (result && !IS_ERR(result)) {
/*
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 48bb474ce29..1abd31fd5bf 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -50,7 +50,7 @@ extern int cifs_atomic_open(struct inode *, struct dentry *,
struct file *, unsigned, umode_t,
int *);
extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
- struct nameidata *);
+ unsigned int);
extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
extern int cifs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index b97ff48b7df..2d732b9276e 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -401,7 +401,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
* in network traffic in the other paths.
*/
if (!(oflags & O_CREAT)) {
- struct dentry *res = cifs_lookup(inode, direntry, NULL);
+ struct dentry *res = cifs_lookup(inode, direntry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
@@ -621,7 +621,7 @@ mknod_out:
struct dentry *
cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
- struct nameidata *nd)
+ unsigned int flags)
{
int xid;
int rc = 0; /* to get around spurious gcc warning, set to zero here */
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 7f8f1a7c6d8..da35e965861 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -31,7 +31,7 @@
/* dir inode-ops */
static int coda_create(struct inode *dir, struct dentry *new, umode_t mode, struct nameidata *nd);
-static struct dentry *coda_lookup(struct inode *dir, struct dentry *target, struct nameidata *nd);
+static struct dentry *coda_lookup(struct inode *dir, struct dentry *target, unsigned int flags);
static int coda_link(struct dentry *old_dentry, struct inode *dir_inode,
struct dentry *entry);
static int coda_unlink(struct inode *dir_inode, struct dentry *entry);
@@ -94,7 +94,7 @@ const struct file_operations coda_dir_operations = {
/* inode operations for directories */
/* access routines: lookup, readlink, permission */
-static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struct nameidata *nd)
+static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, unsigned int flags)
{
struct super_block *sb = dir->i_sb;
const char *name = entry->d_name.name;
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 7e6c52d8a20..7414ae24a79 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -442,7 +442,7 @@ static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * den
static struct dentry * configfs_lookup(struct inode *dir,
struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct configfs_dirent * parent_sd = dentry->d_parent->d_fsdata;
struct configfs_dirent * sd;
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index d013c46402e..28cca01ca9c 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -417,7 +417,7 @@ static int cramfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
/*
* Lookup and fill in the inode data..
*/
-static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
unsigned int offset = 0;
struct inode *inode = NULL;
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index a07441a0a87..4ab50c3f5ab 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -374,7 +374,7 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry,
*/
static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
struct dentry *ecryptfs_dentry,
- struct nameidata *ecryptfs_nd)
+ unsigned int flags)
{
char *encrypted_and_encoded_name = NULL;
size_t encrypted_and_encoded_name_size;
diff --git a/fs/efs/efs.h b/fs/efs/efs.h
index d8305b582ab..5528926ac7f 100644
--- a/fs/efs/efs.h
+++ b/fs/efs/efs.h
@@ -129,7 +129,7 @@ extern struct inode *efs_iget(struct super_block *, unsigned long);
extern efs_block_t efs_map_block(struct inode *, efs_block_t);
extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
-extern struct dentry *efs_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
int fh_len, int fh_type);
extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
diff --git a/fs/efs/namei.c b/fs/efs/namei.c
index 832b10ded82..96f66d213a1 100644
--- a/fs/efs/namei.c
+++ b/fs/efs/namei.c
@@ -58,7 +58,8 @@ static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len)
return(0);
}
-struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) {
+struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
efs_ino_t inodenum;
struct inode *inode = NULL;
diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
index fc7161d6bf6..909ed6ea4cf 100644
--- a/fs/exofs/namei.c
+++ b/fs/exofs/namei.c
@@ -46,7 +46,7 @@ static inline int exofs_add_nondir(struct dentry *dentry, struct inode *inode)
}
static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode;
ino_t ino;
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index f663a67d7bf..b3e6778cd1e 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -55,7 +55,7 @@ static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
* Methods themselves.
*/
-static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
{
struct inode * inode;
ino_t ino;
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index eeb63dfc5d2..86d25f3f604 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1011,7 +1011,7 @@ errout:
return NULL;
}
-static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
{
struct inode * inode;
struct ext3_dir_entry_2 * de;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 5845cd97bf8..4fba3cd42e2 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1312,7 +1312,7 @@ errout:
return NULL;
}
-static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct ext4_dir_entry_2 *de;
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index c5938c9084b..47c608b0529 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -201,7 +201,7 @@ static const struct dentry_operations msdos_dentry_operations = {
/***** Get inode using directory and name */
static struct dentry *msdos_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct super_block *sb = dir->i_sb;
struct fat_slot_info sinfo;
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 0bbdf399006..44152571524 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -714,7 +714,7 @@ static int vfat_d_anon_disconn(struct dentry *dentry)
}
static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct super_block *sb = dir->i_sb;
struct fat_slot_info sinfo;
diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c
index 3360f1e678a..bd447e88f20 100644
--- a/fs/freevxfs/vxfs_lookup.c
+++ b/fs/freevxfs/vxfs_lookup.c
@@ -48,7 +48,7 @@
#define VXFS_BLOCK_PER_PAGE(sbp) ((PAGE_CACHE_SIZE / (sbp)->s_blocksize))
-static struct dentry * vxfs_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry * vxfs_lookup(struct inode *, struct dentry *, unsigned int);
static int vxfs_readdir(struct file *, void *, filldir_t);
const struct inode_operations vxfs_dir_inode_ops = {
@@ -203,7 +203,7 @@ vxfs_inode_by_name(struct inode *dip, struct dentry *dp)
* in the return pointer.
*/
static struct dentry *
-vxfs_lookup(struct inode *dip, struct dentry *dp, struct nameidata *nd)
+vxfs_lookup(struct inode *dip, struct dentry *dp, unsigned int flags)
{
struct inode *ip = NULL;
ino_t ino;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index eba30bd9ba2..385235ac137 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -316,7 +316,7 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
}
static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
- struct nameidata *nd)
+ unsigned int flags)
{
int err;
struct fuse_entry_out outarg;
@@ -478,7 +478,7 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
struct dentry *res = NULL;
if (d_unhashed(entry)) {
- res = fuse_lookup(dir, entry, NULL);
+ res = fuse_lookup(dir, entry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index a9ba2444e07..19e443b7335 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -775,7 +775,7 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
*/
static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0);
if (inode && !IS_ERR(inode)) {
diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c
index 62fc14ea4b7..617b1ed71f5 100644
--- a/fs/hfs/dir.c
+++ b/fs/hfs/dir.c
@@ -18,7 +18,7 @@
* hfs_lookup()
*/
static struct dentry *hfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
hfs_cat_rec rec;
struct hfs_find_data fd;
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 761ec06354b..451c97281b8 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -489,7 +489,7 @@ out:
}
static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode = NULL;
hfs_cat_rec rec;
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 26b53fb09f6..90c2f78b2c7 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -25,7 +25,7 @@ static inline void hfsplus_instantiate(struct dentry *dentry,
/* Find the entry inside dir named dentry->d_name */
static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode = NULL;
struct hfs_find_data fd;
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 82b69ee4dac..7009265b746 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -168,7 +168,7 @@ const struct dentry_operations hfsplus_dentry_operations = {
};
static struct dentry *hfsplus_file_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
struct hfs_find_data fd;
struct super_block *sb = dir->i_sb;
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 2afa5bbccf9..0ea005228e1 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -595,7 +595,7 @@ int hostfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
}
struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode;
char *name;
diff --git a/fs/hpfs/dir.c b/fs/hpfs/dir.c
index b8472f803f4..78e12b2e0ea 100644
--- a/fs/hpfs/dir.c
+++ b/fs/hpfs/dir.c
@@ -189,7 +189,7 @@ out:
* to tell read_inode to read fnode or not.
*/
-struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
const unsigned char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index c07ef1f1ced..ac1ead194db 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -220,7 +220,7 @@ extern const struct dentry_operations hpfs_dentry_operations;
/* dir.c */
-struct dentry *hpfs_lookup(struct inode *, struct dentry *, struct nameidata *);
+struct dentry *hpfs_lookup(struct inode *, struct dentry *, unsigned int);
extern const struct file_operations hpfs_dir_ops;
/* dnode.c */
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index d4f93b52cec..e5c06531dcc 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -138,7 +138,7 @@ static int file_removed(struct dentry *dentry, const char *file)
}
static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct dentry *proc_dentry, *parent;
struct qstr *name = &dentry->d_name;
diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index 0e73f63d927..3620ad1ea9b 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -114,7 +114,7 @@ extern int isofs_name_translate(struct iso_directory_record *, char *, struct in
int get_joliet_filename(struct iso_directory_record *, unsigned char *, struct inode *);
int get_acorn_filename(struct iso_directory_record *, char *, struct inode *);
-extern struct dentry *isofs_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *isofs_lookup(struct inode *, struct dentry *, unsigned int flags);
extern struct buffer_head *isofs_bread(struct inode *, sector_t);
extern int isofs_get_blocks(struct inode *, sector_t, struct buffer_head **, unsigned long);
diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
index 1e2946f2a69..c167028844e 100644
--- a/fs/isofs/namei.c
+++ b/fs/isofs/namei.c
@@ -163,7 +163,7 @@ isofs_find_entry(struct inode *dir, struct dentry *dentry,
return 0;
}
-struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
int found;
unsigned long uninitialized_var(block);
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index b56018896d5..6a601673f89 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -27,7 +27,7 @@ static int jffs2_readdir (struct file *, void *, filldir_t);
static int jffs2_create (struct inode *,struct dentry *,umode_t,
struct nameidata *);
static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
- struct nameidata *);
+ unsigned int);
static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
static int jffs2_unlink (struct inode *,struct dentry *);
static int jffs2_symlink (struct inode *,struct dentry *,const char *);
@@ -74,7 +74,7 @@ const struct inode_operations jffs2_dir_inode_operations =
nice and simple
*/
static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
- struct nameidata *nd)
+ unsigned int flags)
{
struct jffs2_inode_info *dir_f;
struct jffs2_full_dirent *fd = NULL, *fd_list;
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index f37977fb087..34fe85555ca 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1436,7 +1436,7 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry,
return rc;
}
-static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, unsigned int flags)
{
struct btstack btstack;
ino_t inum;
diff --git a/fs/libfs.c b/fs/libfs.c
index f86ec27a423..ebd03f6910d 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -53,7 +53,7 @@ static int simple_delete_dentry(const struct dentry *dentry)
* Lookup the data. This is trivial - if the dentry didn't already
* exist, we know it is negative. Set d_op to delete negative dentries.
*/
-struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
static const struct dentry_operations simple_dentry_operations = {
.d_delete = simple_delete_dentry,
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index bea5d1b9954..8a3dcc615b3 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -349,7 +349,7 @@ static void logfs_set_name(struct logfs_disk_dentry *dd, struct qstr *name)
}
static struct dentry *logfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct page *page;
struct logfs_disk_dentry *dd;
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 2d0ee178630..1f245240ea0 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -18,7 +18,7 @@ static int add_nondir(struct dentry *dentry, struct inode *inode)
return err;
}
-static struct dentry *minix_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *minix_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
{
struct inode * inode = NULL;
ino_t ino;
diff --git a/fs/namei.c b/fs/namei.c
index 2e943ab04f3..175e81b8f26 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1090,7 +1090,7 @@ static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
return ERR_PTR(-ENOENT);
}
- old = dir->i_op->lookup(dir, dentry, nd);
+ old = dir->i_op->lookup(dir, dentry, nd ? nd->flags : 0);
if (unlikely(old)) {
dput(dentry);
dentry = old;
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index 32607f74958..a0cff22bfc9 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -31,7 +31,7 @@ static void ncp_do_readdir(struct file *, void *, filldir_t,
static int ncp_readdir(struct file *, void *, filldir_t);
static int ncp_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
-static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *ncp_lookup(struct inode *, struct dentry *, unsigned int);
static int ncp_unlink(struct inode *, struct dentry *);
static int ncp_mkdir(struct inode *, struct dentry *, umode_t);
static int ncp_rmdir(struct inode *, struct dentry *);
@@ -836,7 +836,7 @@ out:
return result;
}
-static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct ncp_server *server = NCP_SERVER(dir);
struct inode *inode = NULL;
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 656f52e9aa2..8f21205c589 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -46,7 +46,7 @@
static int nfs_opendir(struct inode *, struct file *);
static int nfs_closedir(struct inode *, struct file *);
static int nfs_readdir(struct file *, void *, filldir_t);
-static struct dentry *nfs_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
static int nfs_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
static int nfs_mkdir(struct inode *, struct dentry *, umode_t);
static int nfs_rmdir(struct inode *, struct dentry *);
@@ -1270,7 +1270,7 @@ const struct dentry_operations nfs_dentry_operations = {
.d_release = nfs_d_release,
};
-static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
struct dentry *res;
struct dentry *parent;
@@ -1291,7 +1291,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
* If we're doing an exclusive create, optimize away the lookup
* but don't hash the dentry.
*/
- if (nd && nfs_is_exclusive_create(dir, nd->flags)) {
+ if (nfs_is_exclusive_create(dir, flags)) {
d_instantiate(dentry, NULL);
res = NULL;
goto out;
@@ -1482,7 +1482,7 @@ out:
return err;
no_open:
- res = nfs_lookup(dir, dentry, NULL);
+ res = nfs_lookup(dir, dentry, 0);
err = PTR_ERR(res);
if (IS_ERR(res))
goto out;
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index b72847988b7..5e5f779db76 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -63,7 +63,7 @@ static inline int nilfs_add_nondir(struct dentry *dentry, struct inode *inode)
*/
static struct dentry *
-nilfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+nilfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
ino_t ino;
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c
index 358273e59ad..436f36037e0 100644
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@@ -101,7 +101,7 @@
* Locking: Caller must hold i_mutex on the directory.
*/
static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent,
- struct nameidata *nd)
+ unsigned int flags)
{
ntfs_volume *vol = NTFS_SB(dir_ino->i_sb);
struct inode *dent_inode;
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 9f39c640cdd..fd71f6e5841 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -98,7 +98,7 @@ static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
int status;
u64 blkno;
diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c
index f00576ec320..3d254872e64 100644
--- a/fs/omfs/dir.c
+++ b/fs/omfs/dir.c
@@ -291,7 +291,7 @@ static int omfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
}
static struct dentry *omfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct buffer_head *bh;
struct inode *inode = NULL;
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index bc49c975d50..4a3477949bc 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -170,13 +170,13 @@ static const struct file_operations openprom_operations = {
.llseek = generic_file_llseek,
};
-static struct dentry *openpromfs_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *openpromfs_lookup(struct inode *, struct dentry *, unsigned int);
static const struct inode_operations openprom_inode_operations = {
.lookup = openpromfs_lookup,
};
-static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct op_inode_info *ent_oi, *oi = OP_I(dir);
struct device_node *dp, *child;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index bf749cca4cc..8eaa5ea1c61 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1956,7 +1956,7 @@ out_no_task:
}
static struct dentry *proc_lookupfd(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
return proc_lookupfd_common(dir, dentry, proc_fd_instantiate);
}
@@ -2145,7 +2145,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
}
static struct dentry *proc_map_files_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
unsigned long vm_start, vm_end;
struct vm_area_struct *vma;
@@ -2380,7 +2380,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
static struct dentry *proc_lookupfdinfo(struct inode *dir,
struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
return proc_lookupfd_common(dir, dentry, proc_fdinfo_instantiate);
}
@@ -2630,7 +2630,7 @@ static const struct file_operations proc_attr_dir_operations = {
};
static struct dentry *proc_attr_dir_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
return proc_pident_lookup(dir, dentry,
attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
@@ -3114,7 +3114,8 @@ static const struct file_operations proc_tgid_base_operations = {
.llseek = default_llseek,
};
-static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
return proc_pident_lookup(dir, dentry,
tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
}
@@ -3243,7 +3244,7 @@ out:
return error;
}
-struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
struct dentry *result;
struct task_struct *task;
@@ -3470,7 +3471,8 @@ static int proc_tid_base_readdir(struct file * filp,
tid_base_stuff,ARRAY_SIZE(tid_base_stuff));
}
-static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
return proc_pident_lookup(dir, dentry,
tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
}
@@ -3514,7 +3516,7 @@ out:
return error;
}
-static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
struct dentry *result = ERR_PTR(-ENOENT);
struct task_struct *task;
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 2edf34f2eb6..b3647fe6a60 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -446,7 +446,7 @@ out_unlock:
}
struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
return proc_lookup_de(PDE(dir), dir, dentry);
}
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index e0c2a48dab7..e1167a1c912 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -106,7 +106,7 @@ void pde_users_dec(struct proc_dir_entry *pde);
extern spinlock_t proc_subdir_lock;
-struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int);
int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
unsigned long task_vsize(struct mm_struct *);
unsigned long task_statm(struct mm_struct *,
@@ -132,7 +132,7 @@ int proc_remount(struct super_block *sb, int *flags, char *data);
* of the /proc/<pid> subdirectories.
*/
int proc_readdir(struct file *, void *, filldir_t);
-struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
+struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 40ceb40f985..b178ed733c3 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -140,7 +140,7 @@ const struct file_operations proc_ns_dir_operations = {
};
static struct dentry *proc_ns_dir_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
struct dentry *error;
struct task_struct *task = get_proc_task(dir);
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 06e1cc17caf..fe72cd073de 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -119,7 +119,7 @@ static struct net *get_proc_task_net(struct inode *dir)
}
static struct dentry *proc_tgid_net_lookup(struct inode *dir,
- struct dentry *dentry, struct nameidata *nd)
+ struct dentry *dentry, unsigned int flags)
{
struct dentry *de;
struct net *net;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index fda69fa3909..dfafeb2b05a 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -433,7 +433,7 @@ static struct ctl_table_header *grab_header(struct inode *inode)
}
static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct ctl_table_header *head = grab_header(dir);
struct ctl_table_header *h = NULL;
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 7c30fce037c..568b20290c7 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -200,13 +200,12 @@ static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct
return 0;
}
-static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
{
- if (!proc_lookup(dir, dentry, nd)) {
+ if (!proc_lookup(dir, dentry, flags))
return NULL;
- }
- return proc_pid_lookup(dir, dentry, nd);
+ return proc_pid_lookup(dir, dentry, flags);
}
static int proc_root_readdir(struct file * filp,
diff --git a/fs/qnx4/namei.c b/fs/qnx4/namei.c
index a512c0b30e8..d024505ba00 100644
--- a/fs/qnx4/namei.c
+++ b/fs/qnx4/namei.c
@@ -95,7 +95,7 @@ static struct buffer_head *qnx4_find_entry(int len, struct inode *dir,
return NULL;
}
-struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
int ino;
struct qnx4_inode_entry *de;
diff --git a/fs/qnx4/qnx4.h b/fs/qnx4/qnx4.h
index 244d4620189..34e2d329c97 100644
--- a/fs/qnx4/qnx4.h
+++ b/fs/qnx4/qnx4.h
@@ -23,7 +23,7 @@ struct qnx4_inode_info {
};
extern struct inode *qnx4_iget(struct super_block *, unsigned long);
-extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
+extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags);
extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
diff --git a/fs/qnx6/namei.c b/fs/qnx6/namei.c
index 8a97289e04a..0561326a94f 100644
--- a/fs/qnx6/namei.c
+++ b/fs/qnx6/namei.c
@@ -13,7 +13,7 @@
#include "qnx6.h"
struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
unsigned ino;
struct page *page;
diff --git a/fs/qnx6/qnx6.h b/fs/qnx6/qnx6.h
index 6c5e02a0b6a..b00fcc960d3 100644
--- a/fs/qnx6/qnx6.h
+++ b/fs/qnx6/qnx6.h
@@ -45,7 +45,7 @@ struct qnx6_inode_info {
extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd);
+ unsigned int flags);
#ifdef CONFIG_QNX6FS_DEBUG
extern void qnx6_superblock_debug(struct qnx6_super_block *,
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 84e8a69cee9..1d9cf248c47 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -322,7 +322,7 @@ static int reiserfs_find_entry(struct inode *dir, const char *name, int namelen,
}
static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
int retval;
int lock_depth;
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index e64f6b5f7ae..77c5f217398 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -210,7 +210,7 @@ out:
* look up an entry in a directory
*/
static struct dentry *romfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
unsigned long offset, maxoff;
struct inode *inode;
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index abcc58f3c15..7834a517f7f 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -134,7 +134,7 @@ out:
static struct dentry *squashfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
const unsigned char *name = dentry->d_name.name;
int len = dentry->d_name.len;
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 038e74b3af8..efd373e3e0a 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -764,7 +764,7 @@ int sysfs_create_dir(struct kobject * kobj)
}
static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct dentry *ret = NULL;
struct dentry *parent = dentry->d_parent;
diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c
index d7466e29361..a8c4359cd0e 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -43,7 +43,7 @@ const struct dentry_operations sysv_dentry_operations = {
.d_hash = sysv_hash,
};
-static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
{
struct inode * inode = NULL;
ino_t ino;
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index a6d42efc76d..845b2df0831 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -184,7 +184,7 @@ static int dbg_check_name(const struct ubifs_info *c,
}
static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
int err;
union ubifs_key key;
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 18024178ac4..929cc205985 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -251,7 +251,7 @@ out_ok:
}
static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode = NULL;
struct fileIdentDesc cfi;
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index a2281cadefa..bc77fa170b9 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -46,7 +46,7 @@ static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
return err;
}
-static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
{
struct inode * inode = NULL;
ino_t ino;
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 1a25fd80279..b41cfba14fa 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -197,7 +197,7 @@ STATIC struct dentry *
xfs_vn_lookup(
struct inode *dir,
struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct xfs_inode *cip;
struct xfs_name name;
@@ -222,7 +222,7 @@ STATIC struct dentry *
xfs_vn_ci_lookup(
struct inode *dir,
struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct xfs_inode *ip;
struct xfs_name xname;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 17ee20dba86..7a71709b7fa 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1666,7 +1666,7 @@ struct file_operations {
};
struct inode_operations {
- struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
+ struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
void * (*follow_link) (struct dentry *, struct nameidata *);
int (*permission) (struct inode *, int);
struct posix_acl * (*get_acl)(struct inode *, int);
@@ -2571,7 +2571,7 @@ extern int simple_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata);
-extern struct dentry *simple_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *simple_lookup(struct inode *, struct dentry *, unsigned int flags);
extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *);
extern const struct file_operations simple_dir_operations;
extern const struct inode_operations simple_dir_inode_operations;
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index b303dfc7dce..0cd1314acda 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -822,7 +822,7 @@ EXPORT_SYMBOL_GPL(cgroup_unlock);
*/
static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
-static struct dentry *cgroup_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *cgroup_lookup(struct inode *, struct dentry *, unsigned int);
static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry);
static int cgroup_populate_dir(struct cgroup *cgrp);
static const struct inode_operations cgroup_dir_inode_operations;
@@ -2570,7 +2570,7 @@ static const struct inode_operations cgroup_dir_inode_operations = {
.rename = cgroup_rename,
};
-static struct dentry *cgroup_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *cgroup_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
if (dentry->d_name.len > NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
--
cgit v1.2.3-70-g09d2
From 72bd866a01fc62ccbc466f3eb7599b14c937e96b Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 17:17:17 -0400
Subject: fs/namei.c: don't pass nameidata to __lookup_hash() and lookup_real()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 175e81b8f26..fc01090a96c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1080,7 +1080,7 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
* dir->d_inode->i_mutex must be held
*/
static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct dentry *old;
@@ -1090,7 +1090,7 @@ static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
return ERR_PTR(-ENOENT);
}
- old = dir->i_op->lookup(dir, dentry, nd ? nd->flags : 0);
+ old = dir->i_op->lookup(dir, dentry, flags);
if (unlikely(old)) {
dput(dentry);
dentry = old;
@@ -1099,16 +1099,16 @@ static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
}
static struct dentry *__lookup_hash(struct qstr *name,
- struct dentry *base, struct nameidata *nd)
+ struct dentry *base, unsigned int flags)
{
bool need_lookup;
struct dentry *dentry;
- dentry = lookup_dcache(name, base, nd ? nd->flags : 0, &need_lookup);
+ dentry = lookup_dcache(name, base, flags, &need_lookup);
if (!need_lookup)
return dentry;
- return lookup_real(base->d_inode, dentry, nd);
+ return lookup_real(base->d_inode, dentry, flags);
}
/*
@@ -1227,7 +1227,7 @@ static int lookup_slow(struct nameidata *nd, struct qstr *name,
BUG_ON(nd->inode != parent->d_inode);
mutex_lock(&parent->d_inode->i_mutex);
- dentry = __lookup_hash(name, parent, nd);
+ dentry = __lookup_hash(name, parent, nd->flags);
mutex_unlock(&parent->d_inode->i_mutex);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
@@ -1859,7 +1859,7 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
*/
static struct dentry *lookup_hash(struct nameidata *nd)
{
- return __lookup_hash(&nd->last, nd->path.dentry, nd);
+ return __lookup_hash(&nd->last, nd->path.dentry, nd->flags);
}
/**
@@ -1906,7 +1906,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
if (err)
return ERR_PTR(err);
- return __lookup_hash(&this, base, NULL);
+ return __lookup_hash(&this, base, 0);
}
int user_path_at_empty(int dfd, const char __user *name, unsigned flags,
@@ -2310,7 +2310,7 @@ out:
no_open:
if (need_lookup) {
- dentry = lookup_real(dir, dentry, nd);
+ dentry = lookup_real(dir, dentry, nd->flags);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
@@ -2372,7 +2372,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
if (need_lookup) {
BUG_ON(dentry->d_inode);
- dentry = lookup_real(dir_inode, dentry, nd);
+ dentry = lookup_real(dir_inode, dentry, nd->flags);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
}
--
cgit v1.2.3-70-g09d2
From ebfc3b49a7ac25920cb5be5445f602e51d2ea559 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 18:05:36 -0400
Subject: don't pass nameidata to ->create()
boolean "does it have to be exclusive?" flag is passed instead;
Local filesystem should just ignore it - the object is guaranteed
not to be there yet.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/porting | 6 ++++++
Documentation/filesystems/vfs.txt | 2 +-
fs/9p/vfs_inode.c | 2 +-
fs/9p/vfs_inode_dotl.c | 2 +-
fs/affs/affs.h | 2 +-
fs/affs/namei.c | 2 +-
fs/afs/dir.c | 4 ++--
fs/bad_inode.c | 2 +-
fs/bfs/dir.c | 2 +-
fs/btrfs/inode.c | 2 +-
fs/ceph/dir.c | 2 +-
fs/cifs/cifsfs.h | 2 +-
fs/cifs/dir.c | 2 +-
fs/coda/dir.c | 4 ++--
fs/ecryptfs/inode.c | 3 +--
fs/exofs/namei.c | 2 +-
fs/ext2/namei.c | 2 +-
fs/ext3/namei.c | 2 +-
fs/ext4/namei.c | 2 +-
fs/fat/namei_msdos.c | 2 +-
fs/fat/namei_vfat.c | 2 +-
fs/fuse/dir.c | 2 +-
fs/gfs2/inode.c | 5 +----
fs/hfs/dir.c | 2 +-
fs/hfsplus/dir.c | 2 +-
fs/hostfs/hostfs_kern.c | 2 +-
fs/hpfs/namei.c | 2 +-
fs/hugetlbfs/inode.c | 2 +-
fs/jffs2/dir.c | 4 ++--
fs/jfs/namei.c | 2 +-
fs/logfs/dir.c | 2 +-
fs/minix/namei.c | 2 +-
fs/namei.c | 3 +--
fs/ncpfs/dir.c | 4 ++--
fs/nfs/dir.c | 9 +++------
fs/nilfs2/namei.c | 2 +-
fs/ocfs2/dlmfs/dlmfs.c | 2 +-
fs/ocfs2/namei.c | 2 +-
fs/omfs/dir.c | 2 +-
fs/ramfs/inode.c | 2 +-
fs/reiserfs/namei.c | 2 +-
fs/reiserfs/xattr.c | 2 +-
fs/sysv/namei.c | 2 +-
fs/ubifs/dir.c | 2 +-
fs/udf/namei.c | 2 +-
fs/ufs/namei.c | 2 +-
fs/xfs/xfs_iops.c | 2 +-
include/linux/fs.h | 2 +-
ipc/mqueue.c | 2 +-
mm/shmem.c | 2 +-
51 files changed, 62 insertions(+), 64 deletions(-)
(limited to 'fs')
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 33f2c8f1db8..e0cce2a5f82 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -37,7 +37,7 @@ d_manage: no no yes (ref-walk) maybe
--------------------------- inode_operations ---------------------------
prototypes:
- int (*create) (struct inode *,struct dentry *,umode_t, struct nameidata *);
+ int (*create) (struct inode *,struct dentry *,umode_t, bool);
struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
int (*link) (struct dentry *,struct inode *,struct dentry *);
int (*unlink) (struct inode *,struct dentry *);
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 690f573928b..2bef2b3843d 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -436,3 +436,9 @@ d_make_root() drops the reference to inode if dentry allocation fails.
[mandatory]
The witch is dead! Well, 2/3 of it, anyway. ->d_revalidate() and
->lookup() do *not* take struct nameidata anymore; just the flags.
+--
+[mandatory]
+ ->create() doesn't take struct nameidata *; unlike the previous
+two, it gets "is it an O_EXCL or equivalent?" boolean argument. Note that
+local filesystems can ignore tha argument - they are guaranteed that the
+object doesn't exist. It's remote/distributed ones that might care...
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index ee786354946..aa754e01464 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -341,7 +341,7 @@ This describes how the VFS can manipulate an inode in your
filesystem. As of kernel 2.6.22, the following members are defined:
struct inode_operations {
- int (*create) (struct inode *,struct dentry *, umode_t, struct nameidata *);
+ int (*create) (struct inode *,struct dentry *, umode_t, bool);
struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
int (*link) (struct dentry *,struct inode *,struct dentry *);
int (*unlink) (struct inode *,struct dentry *);
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index bb0d7627f95..cbf9dbb1b2a 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -725,7 +725,7 @@ error:
static int
v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
u32 perm = unixmode2p9mode(v9ses, mode);
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index b97619fed19..40895546e10 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -235,7 +235,7 @@ int v9fs_open_to_dotl_flags(int flags)
static int
v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
- struct nameidata *nd)
+ bool excl)
{
return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
}
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 49e4e3457bf..6e216419f34 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -155,7 +155,7 @@ extern void affs_free_bitmap(struct super_block *sb);
extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
extern int affs_unlink(struct inode *dir, struct dentry *dentry);
-extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *);
+extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
extern int affs_rmdir(struct inode *dir, struct dentry *dentry);
extern int affs_link(struct dentry *olddentry, struct inode *dir,
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 7f9721be709..ff65884a783 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -255,7 +255,7 @@ affs_unlink(struct inode *dir, struct dentry *dentry)
}
int
-affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
{
struct super_block *sb = dir->i_sb;
struct inode *inode;
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index ffb33e36ea7..db477906ba4 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -29,7 +29,7 @@ static void afs_d_release(struct dentry *dentry);
static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
loff_t fpos, u64 ino, unsigned dtype);
static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd);
+ bool excl);
static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
static int afs_rmdir(struct inode *dir, struct dentry *dentry);
static int afs_unlink(struct inode *dir, struct dentry *dentry);
@@ -949,7 +949,7 @@ error:
* create a regular file on an AFS filesystem
*/
static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct afs_file_status status;
struct afs_callback cb;
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index d27e73c69ba..b1342ffb3cf 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -173,7 +173,7 @@ static const struct file_operations bad_file_ops =
};
static int bad_inode_create (struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
return -EIO;
}
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index 3f1cd3b7168..2785ef91191 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -85,7 +85,7 @@ const struct file_operations bfs_dir_operations = {
extern void dump_imap(const char *, struct super_block *);
static int bfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
int err;
struct inode *inode;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e5f1f81b2d6..fb8d671d00e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4893,7 +4893,7 @@ out_unlock:
}
static int btrfs_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(dir)->root;
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 74b2f3c54fe..00894ff9246 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -730,7 +730,7 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry,
}
static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
return ceph_mknod(dir, dentry, mode, 0);
}
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 1abd31fd5bf..1c49c5a9b27 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -45,7 +45,7 @@ extern const struct address_space_operations cifs_addr_ops_smallbuf;
extern const struct inode_operations cifs_dir_inode_ops;
extern struct inode *cifs_root_iget(struct super_block *);
extern int cifs_create(struct inode *, struct dentry *, umode_t,
- struct nameidata *);
+ bool excl);
extern int cifs_atomic_open(struct inode *, struct dentry *,
struct file *, unsigned, umode_t,
int *);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 2d732b9276e..a180265a10b 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -451,7 +451,7 @@ free_xid:
}
int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
int rc;
int xid = GetXid();
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index da35e965861..49fe52d2560 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -30,7 +30,7 @@
#include "coda_int.h"
/* dir inode-ops */
-static int coda_create(struct inode *dir, struct dentry *new, umode_t mode, struct nameidata *nd);
+static int coda_create(struct inode *dir, struct dentry *new, umode_t mode, bool excl);
static struct dentry *coda_lookup(struct inode *dir, struct dentry *target, unsigned int flags);
static int coda_link(struct dentry *old_dentry, struct inode *dir_inode,
struct dentry *entry);
@@ -188,7 +188,7 @@ static inline void coda_dir_drop_nlink(struct inode *dir)
}
/* creation routines: create, mknod, mkdir, link, symlink */
-static int coda_create(struct inode *dir, struct dentry *de, umode_t mode, struct nameidata *nd)
+static int coda_create(struct inode *dir, struct dentry *de, umode_t mode, bool excl)
{
int error;
const char *name=de->d_name.name;
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 4ab50c3f5ab..f079dafea75 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -240,7 +240,6 @@ out:
* @dir: The inode of the directory in which to create the file.
* @dentry: The eCryptfs dentry
* @mode: The mode of the new file.
- * @nd: nameidata
*
* Creates a new file.
*
@@ -248,7 +247,7 @@ out:
*/
static int
ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
struct inode *ecryptfs_inode;
int rc;
diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
index 909ed6ea4cf..4731fd991ef 100644
--- a/fs/exofs/namei.c
+++ b/fs/exofs/namei.c
@@ -60,7 +60,7 @@ static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry,
}
static int exofs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct inode *inode = exofs_new_inode(dir, mode);
int err = PTR_ERR(inode);
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index b3e6778cd1e..9ba7de0e590 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -94,7 +94,7 @@ struct dentry *ext2_get_parent(struct dentry *child)
* If the create succeeds, we fill in the inode information
* with d_instantiate().
*/
-static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode, struct nameidata *nd)
+static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
{
struct inode *inode;
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 86d25f3f604..85286dbe275 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1690,7 +1690,7 @@ static int ext3_add_nondir(handle_t *handle,
* with d_instantiate().
*/
static int ext3_create (struct inode * dir, struct dentry * dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
handle_t *handle;
struct inode * inode;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 4fba3cd42e2..eca3e48a62f 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2091,7 +2091,7 @@ static int ext4_add_nondir(handle_t *handle,
* with d_instantiate().
*/
static int ext4_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
handle_t *handle;
struct inode *inode;
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index 47c608b0529..70d993a9380 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -265,7 +265,7 @@ static int msdos_add_entry(struct inode *dir, const unsigned char *name,
/***** Create a file */
static int msdos_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct super_block *sb = dir->i_sb;
struct inode *inode = NULL;
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 44152571524..6cc48065243 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -772,7 +772,7 @@ error:
}
static int vfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct super_block *sb = dir->i_sb;
struct inode *inode;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 385235ac137..8964cf3999b 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -611,7 +611,7 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode,
}
static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
return fuse_mknod(dir, entry, mode, 0);
}
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 19e443b7335..867674785fc 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -755,11 +755,8 @@ fail:
*/
static int gfs2_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
- int excl = 0;
- if (nd && (nd->flags & LOOKUP_EXCL))
- excl = 1;
return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl);
}
diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c
index 617b1ed71f5..422dde2ec0a 100644
--- a/fs/hfs/dir.c
+++ b/fs/hfs/dir.c
@@ -187,7 +187,7 @@ static int hfs_dir_release(struct inode *inode, struct file *file)
* the directory and the name (and its length) of the new file.
*/
static int hfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct inode *inode;
int res;
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 90c2f78b2c7..378ea0c43f1 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -465,7 +465,7 @@ out:
}
static int hfsplus_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
return hfsplus_mknod(dir, dentry, mode, 0);
}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 0ea005228e1..124146543aa 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -553,7 +553,7 @@ static int read_name(struct inode *ino, char *name)
}
int hostfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct inode *inode;
char *name;
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index 9083ef8af58..bc9082482f6 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -115,7 +115,7 @@ bail:
return err;
}
-static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
{
const unsigned char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index cc9281b6c62..e13e9bdb0bf 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -565,7 +565,7 @@ static int hugetlbfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mod
return retval;
}
-static int hugetlbfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+static int hugetlbfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
{
return hugetlbfs_mknod(dir, dentry, mode | S_IFREG, 0);
}
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 6a601673f89..23245191c5b 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -25,7 +25,7 @@
static int jffs2_readdir (struct file *, void *, filldir_t);
static int jffs2_create (struct inode *,struct dentry *,umode_t,
- struct nameidata *);
+ bool);
static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
unsigned int);
static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
@@ -175,7 +175,7 @@ static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
static int jffs2_create(struct inode *dir_i, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
struct jffs2_raw_inode *ri;
struct jffs2_inode_info *f, *dir_f;
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 34fe85555ca..c426293e16c 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -73,7 +73,7 @@ static inline void free_ea_wmap(struct inode *inode)
*
*/
static int jfs_create(struct inode *dip, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
int rc = 0;
tid_t tid; /* transaction id */
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index 8a3dcc615b3..26e4a941532 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -502,7 +502,7 @@ static int logfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
}
static int logfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct inode *inode;
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 1f245240ea0..0db73d9dd66 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -55,7 +55,7 @@ static int minix_mknod(struct inode * dir, struct dentry *dentry, umode_t mode,
}
static int minix_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
return minix_mknod(dir, dentry, mode, 0);
}
diff --git a/fs/namei.c b/fs/namei.c
index fc01090a96c..fd71156bfd7 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2082,7 +2082,6 @@ int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
struct nameidata *nd)
{
int error = may_create(dir, dentry);
-
if (error)
return error;
@@ -2093,7 +2092,7 @@ int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
error = security_inode_create(dir, dentry, mode);
if (error)
return error;
- error = dir->i_op->create(dir, dentry, mode, nd);
+ error = dir->i_op->create(dir, dentry, mode, !nd || (nd->flags & LOOKUP_EXCL));
if (!error)
fsnotify_create(dir, dentry);
return error;
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index a0cff22bfc9..4117e7b377b 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -30,7 +30,7 @@ static void ncp_do_readdir(struct file *, void *, filldir_t,
static int ncp_readdir(struct file *, void *, filldir_t);
-static int ncp_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
+static int ncp_create(struct inode *, struct dentry *, umode_t, bool);
static struct dentry *ncp_lookup(struct inode *, struct dentry *, unsigned int);
static int ncp_unlink(struct inode *, struct dentry *);
static int ncp_mkdir(struct inode *, struct dentry *, umode_t);
@@ -980,7 +980,7 @@ out:
}
static int ncp_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
return ncp_create_new(dir, dentry, mode, 0, 0);
}
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 8f21205c589..a6b1c7fb823 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -47,7 +47,7 @@ static int nfs_opendir(struct inode *, struct file *);
static int nfs_closedir(struct inode *, struct file *);
static int nfs_readdir(struct file *, void *, filldir_t);
static struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
-static int nfs_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
+static int nfs_create(struct inode *, struct dentry *, umode_t, bool);
static int nfs_mkdir(struct inode *, struct dentry *, umode_t);
static int nfs_rmdir(struct inode *, struct dentry *);
static int nfs_unlink(struct inode *, struct dentry *);
@@ -1589,11 +1589,11 @@ out_error:
* reply path made it appear to have failed.
*/
static int nfs_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
struct iattr attr;
+ int open_flags = excl ? O_CREAT | O_EXCL : O_CREAT;
int error;
- int open_flags = O_CREAT|O_EXCL;
dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
@@ -1601,9 +1601,6 @@ static int nfs_create(struct inode *dir, struct dentry *dentry,
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- if (nd && !(nd->flags & LOOKUP_EXCL))
- open_flags = O_CREAT;
-
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);
if (error != 0)
goto out_err;
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 5e5f779db76..1d0c0b84c5a 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -85,7 +85,7 @@ nilfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
* with d_instantiate().
*/
static int nilfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct inode *inode;
struct nilfs_transaction_info ti;
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index e31d6ae013a..83b6f98e066 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -526,7 +526,7 @@ bail:
static int dlmfs_create(struct inode *dir,
struct dentry *dentry,
umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
int status = 0;
struct inode *inode;
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index fd71f6e5841..f1fd0741162 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -618,7 +618,7 @@ static int ocfs2_mkdir(struct inode *dir,
static int ocfs2_create(struct inode *dir,
struct dentry *dentry,
umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
int ret;
diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c
index 3d254872e64..fb5b3ff79dc 100644
--- a/fs/omfs/dir.c
+++ b/fs/omfs/dir.c
@@ -285,7 +285,7 @@ static int omfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
}
static int omfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
return omfs_add_node(dir, dentry, mode | S_IFREG);
}
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a1fdabe21de..eab8c09d380 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -114,7 +114,7 @@ static int ramfs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
return retval;
}
-static int ramfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+static int ramfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
{
return ramfs_mknod(dir, dentry, mode | S_IFREG, 0);
}
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 1d9cf248c47..3916be1a330 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -573,7 +573,7 @@ static int new_inode_init(struct inode *inode, struct inode *dir, umode_t mode)
}
static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
int retval;
struct inode *inode;
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index e6ad8d7dea6..d319963aeb1 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -62,7 +62,7 @@
static int xattr_create(struct inode *dir, struct dentry *dentry, int mode)
{
BUG_ON(!mutex_is_locked(&dir->i_mutex));
- return dir->i_op->create(dir, dentry, mode, NULL);
+ return dir->i_op->create(dir, dentry, mode, true);
}
#endif
diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c
index a8c4359cd0e..1c0d5f26476 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -80,7 +80,7 @@ static int sysv_mknod(struct inode * dir, struct dentry * dentry, umode_t mode,
return err;
}
-static int sysv_create(struct inode * dir, struct dentry * dentry, umode_t mode, struct nameidata *nd)
+static int sysv_create(struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
{
return sysv_mknod(dir, dentry, mode, 0);
}
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 845b2df0831..b1cca89aeb6 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -246,7 +246,7 @@ out:
}
static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct inode *inode;
struct ubifs_info *c = dir->i_sb->s_fs_info;
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 929cc205985..544b2799a91 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -551,7 +551,7 @@ static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
}
static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct udf_fileident_bh fibh;
struct inode *inode;
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index bc77fa170b9..90d74b8f8eb 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -71,7 +71,7 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsi
* with d_instantiate().
*/
static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
struct inode *inode;
int err;
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index b41cfba14fa..9c4340f5c3e 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -179,7 +179,7 @@ xfs_vn_create(
struct inode *dir,
struct dentry *dentry,
umode_t mode,
- struct nameidata *nd)
+ bool flags)
{
return xfs_vn_mknod(dir, dentry, mode, 0);
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7a71709b7fa..df869d248e7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1674,7 +1674,7 @@ struct inode_operations {
int (*readlink) (struct dentry *, char __user *,int);
void (*put_link) (struct dentry *, struct nameidata *, void *);
- int (*create) (struct inode *,struct dentry *,umode_t,struct nameidata *);
+ int (*create) (struct inode *,struct dentry *, umode_t, bool);
int (*link) (struct dentry *,struct inode *,struct dentry *);
int (*unlink) (struct inode *,struct dentry *);
int (*symlink) (struct inode *,struct dentry *,const char *);
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 8ce57691e7b..da2c188688b 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -413,7 +413,7 @@ static void mqueue_evict_inode(struct inode *inode)
}
static int mqueue_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, struct nameidata *nd)
+ umode_t mode, bool excl)
{
struct inode *inode;
struct mq_attr *attr = dentry->d_fsdata;
diff --git a/mm/shmem.c b/mm/shmem.c
index bd106361be4..c15b998e5a8 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1877,7 +1877,7 @@ static int shmem_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
}
static int shmem_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool excl)
{
return shmem_mknod(dir, dentry, mode | S_IFREG, 0);
}
--
cgit v1.2.3-70-g09d2
From 312b63fba9e88a0dcf800834b8ede8716bcc1e17 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 10 Jun 2012 18:09:36 -0400
Subject: don't pass nameidata * to vfs_create()
all we want is a boolean flag, same as the method gets now
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/cachefiles/namei.c | 2 +-
fs/ecryptfs/inode.c | 2 +-
fs/namei.c | 9 +++++----
fs/nfsd/vfs.c | 4 ++--
include/linux/fs.h | 2 +-
ipc/mqueue.c | 2 +-
6 files changed, 11 insertions(+), 10 deletions(-)
(limited to 'fs')
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 7f0771d3894..b0b5f7cdfff 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -567,7 +567,7 @@ lookup_again:
if (ret < 0)
goto create_error;
start = jiffies;
- ret = vfs_create(dir->d_inode, next, S_IFREG, NULL);
+ ret = vfs_create(dir->d_inode, next, S_IFREG, true);
cachefiles_hist(cachefiles_create_histogram, start);
if (ret < 0)
goto create_error;
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index f079dafea75..da52cdbe838 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -173,7 +173,7 @@ ecryptfs_do_create(struct inode *directory_inode,
inode = ERR_CAST(lower_dir_dentry);
goto out;
}
- rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, NULL);
+ rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, true);
if (rc) {
printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
"rc = [%d]\n", __func__, rc);
diff --git a/fs/namei.c b/fs/namei.c
index fd71156bfd7..ffcd4e114b6 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2079,7 +2079,7 @@ void unlock_rename(struct dentry *p1, struct dentry *p2)
}
int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+ bool want_excl)
{
int error = may_create(dir, dentry);
if (error)
@@ -2092,7 +2092,7 @@ int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
error = security_inode_create(dir, dentry, mode);
if (error)
return error;
- error = dir->i_op->create(dir, dentry, mode, !nd || (nd->flags & LOOKUP_EXCL));
+ error = dir->i_op->create(dir, dentry, mode, want_excl);
if (!error)
fsnotify_create(dir, dentry);
return error;
@@ -2396,7 +2396,8 @@ static int lookup_open(struct nameidata *nd, struct path *path,
error = security_path_mknod(&nd->path, dentry, mode, 0);
if (error)
goto out_dput;
- error = vfs_create(dir->d_inode, dentry, mode, nd);
+ error = vfs_create(dir->d_inode, dentry, mode,
+ nd->flags & LOOKUP_EXCL);
if (error)
goto out_dput;
}
@@ -2883,7 +2884,7 @@ SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode,
goto out_drop_write;
switch (mode & S_IFMT) {
case 0: case S_IFREG:
- error = vfs_create(path.dentry->d_inode,dentry,mode,NULL);
+ error = vfs_create(path.dentry->d_inode,dentry,mode,true);
break;
case S_IFCHR: case S_IFBLK:
error = vfs_mknod(path.dentry->d_inode,dentry,mode,
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index c8bd9c3be7f..05d9eee6be3 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1329,7 +1329,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
err = 0;
switch (type) {
case S_IFREG:
- host_err = vfs_create(dirp, dchild, iap->ia_mode, NULL);
+ host_err = vfs_create(dirp, dchild, iap->ia_mode, true);
if (!host_err)
nfsd_check_ignore_resizing(iap);
break;
@@ -1492,7 +1492,7 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
goto out;
}
- host_err = vfs_create(dirp, dchild, iap->ia_mode, NULL);
+ host_err = vfs_create(dirp, dchild, iap->ia_mode, true);
if (host_err < 0) {
fh_drop_write(fhp);
goto out_nfserr;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index df869d248e7..2f857e9eeb3 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1571,7 +1571,7 @@ extern void unlock_super(struct super_block *);
/*
* VFS helper functions..
*/
-extern int vfs_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
+extern int vfs_create(struct inode *, struct dentry *, umode_t, bool);
extern int vfs_mkdir(struct inode *, struct dentry *, umode_t);
extern int vfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
extern int vfs_symlink(struct inode *, struct dentry *, const char *);
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index da2c188688b..2dee38d53c7 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -751,7 +751,7 @@ static struct file *do_create(struct ipc_namespace *ipc_ns, struct dentry *dir,
ret = mnt_want_write(ipc_ns->mq_mnt);
if (ret)
goto out;
- ret = vfs_create(dir->d_inode, dentry, mode, NULL);
+ ret = vfs_create(dir->d_inode, dentry, mode, true);
dentry->d_fsdata = NULL;
if (ret)
goto out_drop_write;
--
cgit v1.2.3-70-g09d2
From 1acf0af9b981027f3e73e93f0d3f85abdc794f71 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 14 Jun 2012 16:13:46 +0100
Subject: VFS: Fix the banner comment on lookup_open()
Since commit 197e37d9, the banner comment on lookup_open() no longer matches
what the function returns. It used to return a struct file pointer or NULL and
now it returns an integer and is passed the struct file pointer it is to use
amongst its arguments. Update the comment to reflect this.
Also add a banner comment to atomic_open().
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index ffcd4e114b6..5abab917690 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2192,6 +2192,19 @@ static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
return security_inode_create(dir->dentry->d_inode, dentry, mode);
}
+/*
+ * Attempt to atomically look up, create and open a file from a negative
+ * dentry.
+ *
+ * Returns 0 if successful. The file will have been created and attached to
+ * @file by the filesystem calling finish_open().
+ *
+ * Returns 1 if the file was looked up only or didn't need creating. The
+ * caller will need to perform the open themselves. @path will have been
+ * updated to point to the new dentry. This may be negative.
+ *
+ * Returns an error code otherwise.
+ */
static int atomic_open(struct nameidata *nd, struct dentry *dentry,
struct path *path, struct file *file,
const struct open_flags *op,
@@ -2336,12 +2349,22 @@ looked_up:
}
/*
- * Lookup, maybe create and open the last component
+ * Look up and maybe create and open the last component.
*
* Must be called with i_mutex held on parent.
*
- * Returns open file or NULL on success, error otherwise. NULL means no open
- * was performed, only lookup.
+ * Returns 0 if the file was successfully atomically created (if necessary) and
+ * opened. In this case the file will be returned attached to @file.
+ *
+ * Returns 1 if the file was not completely opened at this time, though lookups
+ * and creations will have been performed and the dentry returned in @path will
+ * be positive upon return if O_CREAT was specified. If O_CREAT wasn't
+ * specified then a negative dentry may be returned.
+ *
+ * An error code is returned otherwise.
+ *
+ * FILE_CREATE will be set in @*opened if the dentry was created and will be
+ * cleared otherwise prior to returning.
*/
static int lookup_open(struct nameidata *nd, struct path *path,
struct file *file,
--
cgit v1.2.3-70-g09d2
From 79714f72d3b964611997de512cb29198c9f2dbbb Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 15 Jun 2012 03:01:42 +0400
Subject: get rid of kern_path_parent()
all callers want the same thing, actually - a kinda-sorta analog of
kern_path_create(). I.e. they want parent vfsmount/dentry (with
->i_mutex held, to make sure the child dentry is still their child)
+ the child dentry.
Signed-off-by Al Viro <viro@zeniv.linux.org.uk>
---
drivers/base/devtmpfs.c | 98 +++++++++++++++++++++----------------------------
fs/namei.c | 22 ++++++++++-
include/linux/namei.h | 2 +-
kernel/audit_watch.c | 25 ++-----------
4 files changed, 65 insertions(+), 82 deletions(-)
(limited to 'fs')
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 765c3a28077..d91a3a0b232 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -227,33 +227,24 @@ static int handle_create(const char *nodename, umode_t mode, struct device *dev)
static int dev_rmdir(const char *name)
{
- struct nameidata nd;
+ struct path parent;
struct dentry *dentry;
int err;
- err = kern_path_parent(name, &nd);
- if (err)
- return err;
-
- mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
- dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
- if (!IS_ERR(dentry)) {
- if (dentry->d_inode) {
- if (dentry->d_inode->i_private == &thread)
- err = vfs_rmdir(nd.path.dentry->d_inode,
- dentry);
- else
- err = -EPERM;
- } else {
- err = -ENOENT;
- }
- dput(dentry);
+ dentry = kern_path_locked(name, &parent);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+ if (dentry->d_inode) {
+ if (dentry->d_inode->i_private == &thread)
+ err = vfs_rmdir(parent.dentry->d_inode, dentry);
+ else
+ err = -EPERM;
} else {
- err = PTR_ERR(dentry);
+ err = -ENOENT;
}
-
- mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
- path_put(&nd.path);
+ dput(dentry);
+ mutex_unlock(&parent.dentry->d_inode->i_mutex);
+ path_put(&parent);
return err;
}
@@ -305,50 +296,43 @@ static int dev_mynode(struct device *dev, struct inode *inode, struct kstat *sta
static int handle_remove(const char *nodename, struct device *dev)
{
- struct nameidata nd;
+ struct path parent;
struct dentry *dentry;
- struct kstat stat;
int deleted = 1;
int err;
- err = kern_path_parent(nodename, &nd);
- if (err)
- return err;
+ dentry = kern_path_locked(nodename, &parent);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
- mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
- dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
- if (!IS_ERR(dentry)) {
- if (dentry->d_inode) {
- err = vfs_getattr(nd.path.mnt, dentry, &stat);
- if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
- struct iattr newattrs;
- /*
- * before unlinking this node, reset permissions
- * of possible references like hardlinks
- */
- newattrs.ia_uid = 0;
- newattrs.ia_gid = 0;
- newattrs.ia_mode = stat.mode & ~0777;
- newattrs.ia_valid =
- ATTR_UID|ATTR_GID|ATTR_MODE;
- mutex_lock(&dentry->d_inode->i_mutex);
- notify_change(dentry, &newattrs);
- mutex_unlock(&dentry->d_inode->i_mutex);
- err = vfs_unlink(nd.path.dentry->d_inode,
- dentry);
- if (!err || err == -ENOENT)
- deleted = 1;
- }
- } else {
- err = -ENOENT;
+ if (dentry->d_inode) {
+ struct kstat stat;
+ err = vfs_getattr(parent.mnt, dentry, &stat);
+ if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
+ struct iattr newattrs;
+ /*
+ * before unlinking this node, reset permissions
+ * of possible references like hardlinks
+ */
+ newattrs.ia_uid = 0;
+ newattrs.ia_gid = 0;
+ newattrs.ia_mode = stat.mode & ~0777;
+ newattrs.ia_valid =
+ ATTR_UID|ATTR_GID|ATTR_MODE;
+ mutex_lock(&dentry->d_inode->i_mutex);
+ notify_change(dentry, &newattrs);
+ mutex_unlock(&dentry->d_inode->i_mutex);
+ err = vfs_unlink(parent.dentry->d_inode, dentry);
+ if (!err || err == -ENOENT)
+ deleted = 1;
}
- dput(dentry);
} else {
- err = PTR_ERR(dentry);
+ err = -ENOENT;
}
- mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+ dput(dentry);
+ mutex_unlock(&parent.dentry->d_inode->i_mutex);
- path_put(&nd.path);
+ path_put(&parent);
if (deleted && strchr(nodename, '/'))
delete_path(nodename);
return err;
diff --git a/fs/namei.c b/fs/namei.c
index 5abab917690..6b29a51bef5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1814,9 +1814,27 @@ static int do_path_lookup(int dfd, const char *name,
return retval;
}
-int kern_path_parent(const char *name, struct nameidata *nd)
+/* does lookup, returns the object with parent locked */
+struct dentry *kern_path_locked(const char *name, struct path *path)
{
- return do_path_lookup(AT_FDCWD, name, LOOKUP_PARENT, nd);
+ struct nameidata nd;
+ struct dentry *d;
+ int err = do_path_lookup(AT_FDCWD, name, LOOKUP_PARENT, &nd);
+ if (err)
+ return ERR_PTR(err);
+ if (nd.last_type != LAST_NORM) {
+ path_put(&nd.path);
+ return ERR_PTR(-EINVAL);
+ }
+ mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
+ d = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
+ if (IS_ERR(d)) {
+ mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+ path_put(&nd.path);
+ return d;
+ }
+ *path = nd.path;
+ return d;
}
int kern_path(const char *name, unsigned int flags, struct path *path)
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 23d85987921..f5931489e15 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -67,7 +67,7 @@ extern int kern_path(const char *, unsigned, struct path *);
extern struct dentry *kern_path_create(int, const char *, struct path *, int);
extern struct dentry *user_path_create(int, const char __user *, struct path *, int);
-extern int kern_path_parent(const char *, struct nameidata *);
+extern struct dentry *kern_path_locked(const char *, struct path *);
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
const char *, unsigned int, struct path *);
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index e683869365d..3823281401b 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -355,34 +355,15 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
/* Get path information necessary for adding watches. */
static int audit_get_nd(struct audit_watch *watch, struct path *parent)
{
- struct nameidata nd;
- struct dentry *d;
- int err;
-
- err = kern_path_parent(watch->path, &nd);
- if (err)
- return err;
-
- if (nd.last_type != LAST_NORM) {
- path_put(&nd.path);
- return -EINVAL;
- }
-
- mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
- d = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
- if (IS_ERR(d)) {
- mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
- path_put(&nd.path);
+ struct dentry *d = kern_path_locked(watch->path, parent);
+ if (IS_ERR(d))
return PTR_ERR(d);
- }
+ mutex_unlock(&parent->dentry->d_inode->i_mutex);
if (d->d_inode) {
/* update watch filter fields */
watch->dev = d->d_inode->i_sb->s_dev;
watch->ino = d->d_inode->i_ino;
}
- mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-
- *parent = nd.path;
dput(d);
return 0;
}
--
cgit v1.2.3-70-g09d2
From 469796d10590341c53cff0a2959254eaf5d465de Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 7 Jun 2012 20:51:39 -0400
Subject: sysfs: switch to ->s_d_op and ->d_release()
a) ->d_iput() is wrong here - what we do to inode is completely usual, it's
dentry->d_fsdata that we want to drop. Just use ->d_release().
b) switch to ->s_d_op - no need to play with d_set_d_op()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/sysfs/dir.c | 16 ++++++----------
fs/sysfs/mount.c | 1 +
fs/sysfs/sysfs.h | 1 +
3 files changed, 8 insertions(+), 10 deletions(-)
(limited to 'fs')
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index efd373e3e0a..77c44ce493f 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -300,7 +300,7 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
static int sysfs_dentry_delete(const struct dentry *dentry)
{
struct sysfs_dirent *sd = dentry->d_fsdata;
- return !!(sd->s_flags & SYSFS_FLAG_REMOVED);
+ return !(sd && !(sd->s_flags & SYSFS_FLAG_REMOVED));
}
static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
@@ -355,18 +355,15 @@ out_bad:
return 0;
}
-static void sysfs_dentry_iput(struct dentry *dentry, struct inode *inode)
+static void sysfs_dentry_release(struct dentry *dentry)
{
- struct sysfs_dirent * sd = dentry->d_fsdata;
-
- sysfs_put(sd);
- iput(inode);
+ sysfs_put(dentry->d_fsdata);
}
-static const struct dentry_operations sysfs_dentry_ops = {
+const struct dentry_operations sysfs_dentry_ops = {
.d_revalidate = sysfs_dentry_revalidate,
.d_delete = sysfs_dentry_delete,
- .d_iput = sysfs_dentry_iput,
+ .d_release = sysfs_dentry_release,
};
struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
@@ -786,6 +783,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
ret = ERR_PTR(-ENOENT);
goto out_unlock;
}
+ dentry->d_fsdata = sysfs_get(sd);
/* attach dentry and inode */
inode = sysfs_get_inode(dir->i_sb, sd);
@@ -797,8 +795,6 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
/* instantiate and hash dentry */
ret = d_find_alias(inode);
if (!ret) {
- d_set_d_op(dentry, &sysfs_dentry_ops);
- dentry->d_fsdata = sysfs_get(sd);
d_add(dentry, inode);
} else {
d_move(ret, dentry);
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 52c3bdb66a8..c15a7a3572e 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -68,6 +68,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
+ sb->s_d_op = &sysfs_dentry_ops;
return 0;
}
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 661a9639570..d73c0932bbd 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -157,6 +157,7 @@ extern struct kmem_cache *sysfs_dir_cachep;
*/
extern struct mutex sysfs_mutex;
extern spinlock_t sysfs_assoc_lock;
+extern const struct dentry_operations sysfs_dentry_ops;
extern const struct file_operations sysfs_dir_operations;
extern const struct inode_operations sysfs_dir_inode_operations;
--
cgit v1.2.3-70-g09d2
From e77fb7cef87856d9d35f2f4d617d0b97148ee7c2 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 7 Jun 2012 20:56:54 -0400
Subject: sysfs: just use d_materialise_unique()
same as for nfs et.al.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/sysfs/dir.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
(limited to 'fs')
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 77c44ce493f..a5cf784f9cc 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -793,14 +793,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
}
/* instantiate and hash dentry */
- ret = d_find_alias(inode);
- if (!ret) {
- d_add(dentry, inode);
- } else {
- d_move(ret, dentry);
- iput(inode);
- }
-
+ ret = d_materialise_unique(dentry, inode);
out_unlock:
mutex_unlock(&sysfs_mutex);
return ret;
--
cgit v1.2.3-70-g09d2
From ee3efa91e240f513898050ef305a49a653c8ed90 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 8 Jun 2012 15:59:33 -0400
Subject: __d_unalias() should refuse to move mountpoints
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/dcache.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
(limited to 'fs')
diff --git a/fs/dcache.c b/fs/dcache.c
index 015586f1ffc..8086636bf79 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2387,14 +2387,13 @@ static struct dentry *__d_unalias(struct inode *inode,
struct dentry *dentry, struct dentry *alias)
{
struct mutex *m1 = NULL, *m2 = NULL;
- struct dentry *ret;
+ struct dentry *ret = ERR_PTR(-EBUSY);
/* If alias and dentry share a parent, then no extra locks required */
if (alias->d_parent == dentry->d_parent)
goto out_unalias;
/* See lock_rename() */
- ret = ERR_PTR(-EBUSY);
if (!mutex_trylock(&dentry->d_sb->s_vfs_rename_mutex))
goto out_err;
m1 = &dentry->d_sb->s_vfs_rename_mutex;
@@ -2402,8 +2401,10 @@ static struct dentry *__d_unalias(struct inode *inode,
goto out_err;
m2 = &alias->d_parent->d_inode->i_mutex;
out_unalias:
- __d_move(alias, dentry);
- ret = alias;
+ if (likely(!d_mountpoint(alias))) {
+ __d_move(alias, dentry);
+ ret = alias;
+ }
out_err:
spin_unlock(&inode->i_lock);
if (m2)
--
cgit v1.2.3-70-g09d2
From c3b1a350846a11dd1054cb7832e098aa37025deb Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 20:28:22 -0400
Subject: debugfs: make sure that debugfs_create_file() gets used only for
regulars
It, debugfs_create_dir() and debugfs_create_link() use the common helper
now.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/debugfs/inode.c | 56 +++++++++++++++++++++++++++++++++---------------------
1 file changed, 34 insertions(+), 22 deletions(-)
(limited to 'fs')
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index b80bc846a15..d423b966bc7 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -335,6 +335,30 @@ static int debugfs_create_by_name(const char *name, umode_t mode,
return error;
}
+struct dentry *__create_file(const char *name, umode_t mode,
+ struct dentry *parent, void *data,
+ const struct file_operations *fops)
+{
+ struct dentry *dentry = NULL;
+ int error;
+
+ pr_debug("debugfs: creating file '%s'\n",name);
+
+ error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
+ &debugfs_mount_count);
+ if (error)
+ goto exit;
+
+ error = debugfs_create_by_name(name, mode, parent, &dentry,
+ data, fops);
+ if (error) {
+ dentry = NULL;
+ simple_release_fs(&debugfs_mount, &debugfs_mount_count);
+ }
+exit:
+ return dentry;
+}
+
/**
* debugfs_create_file - create a file in the debugfs filesystem
* @name: a pointer to a string containing the name of the file to create.
@@ -365,25 +389,15 @@ struct dentry *debugfs_create_file(const char *name, umode_t mode,
struct dentry *parent, void *data,
const struct file_operations *fops)
{
- struct dentry *dentry = NULL;
- int error;
-
- pr_debug("debugfs: creating file '%s'\n",name);
-
- error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
- &debugfs_mount_count);
- if (error)
- goto exit;
-
- error = debugfs_create_by_name(name, mode, parent, &dentry,
- data, fops);
- if (error) {
- dentry = NULL;
- simple_release_fs(&debugfs_mount, &debugfs_mount_count);
- goto exit;
+ switch (mode & S_IFMT) {
+ case S_IFREG:
+ case 0:
+ break;
+ default:
+ BUG();
}
-exit:
- return dentry;
+
+ return __create_file(name, mode, parent, data, fops);
}
EXPORT_SYMBOL_GPL(debugfs_create_file);
@@ -407,8 +421,7 @@ EXPORT_SYMBOL_GPL(debugfs_create_file);
*/
struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)
{
- return debugfs_create_file(name,
- S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
+ return __create_file(name, S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
parent, NULL, NULL);
}
EXPORT_SYMBOL_GPL(debugfs_create_dir);
@@ -446,8 +459,7 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
if (!link)
return NULL;
- result = debugfs_create_file(name, S_IFLNK | S_IRWXUGO, parent, link,
- NULL);
+ result = __create_file(name, S_IFLNK | S_IRWXUGO, parent, link, NULL);
if (!result)
kfree(link);
return result;
--
cgit v1.2.3-70-g09d2
From cfa57c11b0d5a80f7bffa1ab35bc46892127817f Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 20:33:28 -0400
Subject: debugfs: fold debugfs_create_by_name() into the only caller
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/debugfs/inode.c | 53 ++++++++++++++++++++---------------------------------
1 file changed, 20 insertions(+), 33 deletions(-)
(limited to 'fs')
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index d423b966bc7..79f53f3ce7c 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -293,13 +293,19 @@ static struct file_system_type debug_fs_type = {
.kill_sb = kill_litter_super,
};
-static int debugfs_create_by_name(const char *name, umode_t mode,
- struct dentry *parent,
- struct dentry **dentry,
- void *data,
- const struct file_operations *fops)
+struct dentry *__create_file(const char *name, umode_t mode,
+ struct dentry *parent, void *data,
+ const struct file_operations *fops)
{
- int error = 0;
+ struct dentry *dentry = NULL;
+ int error;
+
+ pr_debug("debugfs: creating file '%s'\n",name);
+
+ error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
+ &debugfs_mount_count);
+ if (error)
+ goto exit;
/* If the parent is not specified, we create it in the root.
* We need the root dentry to do this, which is in the super
@@ -309,48 +315,29 @@ static int debugfs_create_by_name(const char *name, umode_t mode,
if (!parent)
parent = debugfs_mount->mnt_root;
- *dentry = NULL;
+ dentry = NULL;
mutex_lock(&parent->d_inode->i_mutex);
- *dentry = lookup_one_len(name, parent, strlen(name));
- if (!IS_ERR(*dentry)) {
+ dentry = lookup_one_len(name, parent, strlen(name));
+ if (!IS_ERR(dentry)) {
switch (mode & S_IFMT) {
case S_IFDIR:
- error = debugfs_mkdir(parent->d_inode, *dentry, mode,
+ error = debugfs_mkdir(parent->d_inode, dentry, mode,
data, fops);
break;
case S_IFLNK:
- error = debugfs_link(parent->d_inode, *dentry, mode,
+ error = debugfs_link(parent->d_inode, dentry, mode,
data, fops);
break;
default:
- error = debugfs_create(parent->d_inode, *dentry, mode,
+ error = debugfs_create(parent->d_inode, dentry, mode,
data, fops);
break;
}
- dput(*dentry);
+ dput(dentry);
} else
- error = PTR_ERR(*dentry);
+ error = PTR_ERR(dentry);
mutex_unlock(&parent->d_inode->i_mutex);
- return error;
-}
-
-struct dentry *__create_file(const char *name, umode_t mode,
- struct dentry *parent, void *data,
- const struct file_operations *fops)
-{
- struct dentry *dentry = NULL;
- int error;
-
- pr_debug("debugfs: creating file '%s'\n",name);
-
- error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
- &debugfs_mount_count);
- if (error)
- goto exit;
-
- error = debugfs_create_by_name(name, mode, parent, &dentry,
- data, fops);
if (error) {
dentry = NULL;
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
--
cgit v1.2.3-70-g09d2
From ac481d6ca4081bdd348cbd84963d1ece843a3407 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 9 Jun 2012 20:40:20 -0400
Subject: debugfs: get rid of useless arguments to debugfs_{mkdir,symlink}
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/debugfs/inode.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)
(limited to 'fs')
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 79f53f3ce7c..d17c20fd74e 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -54,13 +54,12 @@ static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev
break;
case S_IFLNK:
inode->i_op = &debugfs_link_operations;
- inode->i_fop = fops;
inode->i_private = data;
break;
case S_IFDIR:
inode->i_op = &simple_dir_inode_operations;
- inode->i_fop = fops ? fops : &simple_dir_operations;
- inode->i_private = data;
+ inode->i_fop = &simple_dir_operations;
+ inode->i_private = NULL;
/* directory inodes start off with i_nlink == 2
* (for "." entry) */
@@ -91,13 +90,12 @@ static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
return error;
}
-static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode,
- void *data, const struct file_operations *fops)
+static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
int res;
mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
- res = debugfs_mknod(dir, dentry, mode, 0, data, fops);
+ res = debugfs_mknod(dir, dentry, mode, 0, NULL, NULL);
if (!res) {
inc_nlink(dir);
fsnotify_mkdir(dir, dentry);
@@ -106,10 +104,10 @@ static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode,
}
static int debugfs_link(struct inode *dir, struct dentry *dentry, umode_t mode,
- void *data, const struct file_operations *fops)
+ void *data)
{
mode = (mode & S_IALLUGO) | S_IFLNK;
- return debugfs_mknod(dir, dentry, mode, 0, data, fops);
+ return debugfs_mknod(dir, dentry, mode, 0, data, NULL);
}
static int debugfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
@@ -321,12 +319,12 @@ struct dentry *__create_file(const char *name, umode_t mode,
if (!IS_ERR(dentry)) {
switch (mode & S_IFMT) {
case S_IFDIR:
- error = debugfs_mkdir(parent->d_inode, dentry, mode,
- data, fops);
+ error = debugfs_mkdir(parent->d_inode, dentry, mode);
+
break;
case S_IFLNK:
error = debugfs_link(parent->d_inode, dentry, mode,
- data, fops);
+ data);
break;
default:
error = debugfs_create(parent->d_inode, dentry, mode,
--
cgit v1.2.3-70-g09d2
From 408ef013cc9e2f94a14f7ccbbe52ddfb18437a99 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@infradead.org>
Date: Mon, 18 Jun 2012 10:47:03 -0400
Subject: fs: move path_put on failure out of ->follow_link
Currently the non-nd_set_link based versions of ->follow_link are expected
to do a path_put(&nd->path) on failure. This calling convention is unexpected,
undocumented and doesn't match what the nd_set_link-based instances do.
Move the path_put out of the only non-nd_set_link based ->follow_link
instance into the caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 3 +--
fs/proc/base.c | 12 ++++++++----
2 files changed, 9 insertions(+), 6 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 6b29a51bef5..a9b94c62c30 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -624,7 +624,7 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
*p = dentry->d_inode->i_op->follow_link(dentry, nd);
error = PTR_ERR(*p);
if (IS_ERR(*p))
- goto out_put_link;
+ goto out_put_nd_path;
error = 0;
s = nd_get_link(nd);
@@ -646,7 +646,6 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
out_put_nd_path:
path_put(&nd->path);
-out_put_link:
path_put(link);
return error;
}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 8eaa5ea1c61..3bd5ac1ff01 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1427,16 +1427,20 @@ static int proc_exe_link(struct dentry *dentry, struct path *exe_path)
static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
+ struct path path;
int error = -EACCES;
- /* We don't need a base pointer in the /proc filesystem */
- path_put(&nd->path);
-
/* Are we allowed to snoop on the tasks file descriptors? */
if (!proc_fd_access_allowed(inode))
goto out;
- error = PROC_I(inode)->op.proc_get_link(dentry, &nd->path);
+ error = PROC_I(inode)->op.proc_get_link(dentry, &path);
+ if (error)
+ goto out;
+
+ path_put(&nd->path);
+ nd->path = path;
+ return NULL;
out:
return ERR_PTR(error);
}
--
cgit v1.2.3-70-g09d2
From b5fb63c18315c5510c1d0636179c057e0c761c77 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@infradead.org>
Date: Mon, 18 Jun 2012 10:47:04 -0400
Subject: fs: add nd_jump_link
Add a helper that abstracts out the jump to an already parsed struct path
from ->follow_link operation from procfs. Not only does this clean up
the code by moving the two sides of this game into a single helper, but
it also prepares for making struct nameidata private to namei.c
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 27 +++++++++++++++++----------
fs/proc/base.c | 3 +--
include/linux/namei.h | 2 ++
3 files changed, 20 insertions(+), 12 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index a9b94c62c30..0e1b9c3eb36 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -586,6 +586,21 @@ static inline void path_to_nameidata(const struct path *path,
nd->path.dentry = path->dentry;
}
+/*
+ * Helper to directly jump to a known parsed path from ->follow_link,
+ * caller must have taken a reference to path beforehand.
+ */
+void nd_jump_link(struct nameidata *nd, struct path *path)
+{
+ path_put(&nd->path);
+
+ nd->path = *path;
+ nd->inode = nd->path.dentry->d_inode;
+ nd->flags |= LOOKUP_JUMPED;
+
+ BUG_ON(nd->inode->i_op->follow_link);
+}
+
static inline void put_link(struct nameidata *nd, struct path *link, void *cookie)
{
struct inode *inode = link->dentry->d_inode;
@@ -630,17 +645,9 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
s = nd_get_link(nd);
if (s) {
error = __vfs_follow_link(nd, s);
- } else if (nd->last_type == LAST_BIND) {
- nd->flags |= LOOKUP_JUMPED;
- nd->inode = nd->path.dentry->d_inode;
- if (nd->inode->i_op->follow_link) {
- /* stepped on a _really_ weird one */
- path_put(&nd->path);
- error = -ELOOP;
- }
+ if (unlikely(error))
+ put_link(nd, link, *p);
}
- if (unlikely(error))
- put_link(nd, link, *p);
return error;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3bd5ac1ff01..2772208338f 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1438,8 +1438,7 @@ static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
if (error)
goto out;
- path_put(&nd->path);
- nd->path = path;
+ nd_jump_link(nd, &path);
return NULL;
out:
return ERR_PTR(error);
diff --git a/include/linux/namei.h b/include/linux/namei.h
index f5931489e15..d2ef8b34b96 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -80,6 +80,8 @@ extern int follow_up(struct path *);
extern struct dentry *lock_rename(struct dentry *, struct dentry *);
extern void unlock_rename(struct dentry *, struct dentry *);
+extern void nd_jump_link(struct nameidata *nd, struct path *path);
+
static inline void nd_set_link(struct nameidata *nd, char *path)
{
nd->saved_names[nd->depth] = path;
--
cgit v1.2.3-70-g09d2
From c4107b3097465e25f7d6a9b0ac0518b07b24e774 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Wed, 20 Jun 2012 09:55:58 +1000
Subject: notify_change(): check that i_mutex is held
Cc: Djalal Harouni <tixxdz@opendz.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/attr.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/attr.c b/fs/attr.c
index 0da90951d27..29e38a1f7f7 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -171,6 +171,8 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
struct timespec now;
unsigned int ia_valid = attr->ia_valid;
+ WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
+
if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) {
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
return -EPERM;
@@ -250,5 +252,4 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
return error;
}
-
EXPORT_SYMBOL(notify_change);
--
cgit v1.2.3-70-g09d2
From 85d7d618c17a09cfd824c1ad4483c19e6f9637ff Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 23 Jun 2012 22:41:54 +0400
Subject: mark_files_ro(): don't bother with mntget/mntput
mnt_drop_write_file() is safe under any lock
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/file_table.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
(limited to 'fs')
diff --git a/fs/file_table.c b/fs/file_table.c
index a305d9e2d1b..9ace2781931 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -483,10 +483,8 @@ void mark_files_ro(struct super_block *sb)
{
struct file *f;
-retry:
lg_global_lock(&files_lglock);
do_file_list_for_each_entry(sb, f) {
- struct vfsmount *mnt;
if (!S_ISREG(f->f_path.dentry->d_inode->i_mode))
continue;
if (!file_count(f))
@@ -499,12 +497,7 @@ retry:
if (file_check_writeable(f) != 0)
continue;
file_release_write(f);
- mnt = mntget(f->f_path.mnt);
- /* This can sleep, so we can't hold the spinlock. */
- lg_global_unlock(&files_lglock);
- mnt_drop_write(mnt);
- mntput(mnt);
- goto retry;
+ mnt_drop_write_file(f);
} while_file_list_for_each_entry;
lg_global_unlock(&files_lglock);
}
--
cgit v1.2.3-70-g09d2
From c3c4f69424db0760239762d36d0b1b6ae524008b Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 23 Jun 2012 22:49:45 +0400
Subject: do_dentry_open(): close the race with mark_files_ro() in failure exit
we want to take it out of mark_files_ro() reach *before* we start
checking if we ought to drop write access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/open.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs')
diff --git a/fs/open.c b/fs/open.c
index 124ccb1d38a..764cc9c201a 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -727,6 +727,7 @@ static int do_dentry_open(struct file *f,
cleanup_all:
fops_put(f->f_op);
+ file_sb_list_del(f);
if (f->f_mode & FMODE_WRITE) {
put_write_access(inode);
if (!special_file(inode->i_mode)) {
@@ -740,7 +741,6 @@ cleanup_all:
mnt_drop_write(f->f_path.mnt);
}
}
- file_sb_list_del(f);
cleanup_file:
path_put(&f->f_path);
f->f_path.mnt = NULL;
--
cgit v1.2.3-70-g09d2
From 55e4def0a6e79e7eb53017c4935adfed76510cd7 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Mon, 25 Jun 2012 12:55:09 +0100
Subject: VFS: Make chown() and lchown() call fchownat()
Make the chown() and lchown() syscalls jump to the fchownat() syscall with the
appropriate extra arguments.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/open.c | 41 +++++++----------------------------------
1 file changed, 7 insertions(+), 34 deletions(-)
(limited to 'fs')
diff --git a/fs/open.c b/fs/open.c
index 764cc9c201a..75bea868ef8 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -537,25 +537,6 @@ static int chown_common(struct path *path, uid_t user, gid_t group)
return error;
}
-SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)
-{
- struct path path;
- int error;
-
- error = user_path(filename, &path);
- if (error)
- goto out;
- error = mnt_want_write(path.mnt);
- if (error)
- goto out_release;
- error = chown_common(&path, user, group);
- mnt_drop_write(path.mnt);
-out_release:
- path_put(&path);
-out:
- return error;
-}
-
SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
gid_t, group, int, flag)
{
@@ -583,23 +564,15 @@ out:
return error;
}
-SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)
+SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)
{
- struct path path;
- int error;
+ return sys_fchownat(AT_FDCWD, filename, user, group, 0);
+}
- error = user_lpath(filename, &path);
- if (error)
- goto out;
- error = mnt_want_write(path.mnt);
- if (error)
- goto out_release;
- error = chown_common(&path, user, group);
- mnt_drop_write(path.mnt);
-out_release:
- path_put(&path);
-out:
- return error;
+SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)
+{
+ return sys_fchownat(AT_FDCWD, filename, user, group,
+ AT_SYMLINK_NOFOLLOW);
}
SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
--
cgit v1.2.3-70-g09d2
From be34d1a3bc4b6f357a49acb55ae870c81337e4f0 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Mon, 25 Jun 2012 12:55:18 +0100
Subject: VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors
copy_tree() can theoretically fail in a case other than ENOMEM, but always
returns NULL which is interpreted by callers as -ENOMEM. Change it to return
an explicit error.
Also change clone_mnt() for consistency and because union mounts will add new
error cases.
Thanks to Andreas Gruenbacher <agruen@suse.de> for a bug fix.
[AV: folded braino fix by Dan Carpenter]
Original-author: Valerie Aurora <vaurora@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Valerie Aurora <valerie.aurora@gmail.com>
Cc: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namespace.c | 120 ++++++++++++++++++++++++++++------------------------
fs/pnode.c | 5 ++-
kernel/audit_tree.c | 10 ++---
3 files changed, 73 insertions(+), 62 deletions(-)
(limited to 'fs')
diff --git a/fs/namespace.c b/fs/namespace.c
index 8f412abcb67..be1b07a774f 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -708,56 +708,60 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
int flag)
{
struct super_block *sb = old->mnt.mnt_sb;
- struct mount *mnt = alloc_vfsmnt(old->mnt_devname);
+ struct mount *mnt;
+ int err;
- if (mnt) {
- if (flag & (CL_SLAVE | CL_PRIVATE))
- mnt->mnt_group_id = 0; /* not a peer of original */
- else
- mnt->mnt_group_id = old->mnt_group_id;
-
- if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) {
- int err = mnt_alloc_group_id(mnt);
- if (err)
- goto out_free;
- }
+ mnt = alloc_vfsmnt(old->mnt_devname);
+ if (!mnt)
+ return ERR_PTR(-ENOMEM);
- mnt->mnt.mnt_flags = old->mnt.mnt_flags & ~MNT_WRITE_HOLD;
- atomic_inc(&sb->s_active);
- mnt->mnt.mnt_sb = sb;
- mnt->mnt.mnt_root = dget(root);
- mnt->mnt_mountpoint = mnt->mnt.mnt_root;
- mnt->mnt_parent = mnt;
- br_write_lock(&vfsmount_lock);
- list_add_tail(&mnt->mnt_instance, &sb->s_mounts);
- br_write_unlock(&vfsmount_lock);
+ if (flag & (CL_SLAVE | CL_PRIVATE))
+ mnt->mnt_group_id = 0; /* not a peer of original */
+ else
+ mnt->mnt_group_id = old->mnt_group_id;
- if (flag & CL_SLAVE) {
- list_add(&mnt->mnt_slave, &old->mnt_slave_list);
- mnt->mnt_master = old;
- CLEAR_MNT_SHARED(mnt);
- } else if (!(flag & CL_PRIVATE)) {
- if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(old))
- list_add(&mnt->mnt_share, &old->mnt_share);
- if (IS_MNT_SLAVE(old))
- list_add(&mnt->mnt_slave, &old->mnt_slave);
- mnt->mnt_master = old->mnt_master;
- }
- if (flag & CL_MAKE_SHARED)
- set_mnt_shared(mnt);
-
- /* stick the duplicate mount on the same expiry list
- * as the original if that was on one */
- if (flag & CL_EXPIRE) {
- if (!list_empty(&old->mnt_expire))
- list_add(&mnt->mnt_expire, &old->mnt_expire);
- }
+ if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) {
+ err = mnt_alloc_group_id(mnt);
+ if (err)
+ goto out_free;
+ }
+
+ mnt->mnt.mnt_flags = old->mnt.mnt_flags & ~MNT_WRITE_HOLD;
+ atomic_inc(&sb->s_active);
+ mnt->mnt.mnt_sb = sb;
+ mnt->mnt.mnt_root = dget(root);
+ mnt->mnt_mountpoint = mnt->mnt.mnt_root;
+ mnt->mnt_parent = mnt;
+ br_write_lock(&vfsmount_lock);
+ list_add_tail(&mnt->mnt_instance, &sb->s_mounts);
+ br_write_unlock(&vfsmount_lock);
+
+ if (flag & CL_SLAVE) {
+ list_add(&mnt->mnt_slave, &old->mnt_slave_list);
+ mnt->mnt_master = old;
+ CLEAR_MNT_SHARED(mnt);
+ } else if (!(flag & CL_PRIVATE)) {
+ if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(old))
+ list_add(&mnt->mnt_share, &old->mnt_share);
+ if (IS_MNT_SLAVE(old))
+ list_add(&mnt->mnt_slave, &old->mnt_slave);
+ mnt->mnt_master = old->mnt_master;
+ }
+ if (flag & CL_MAKE_SHARED)
+ set_mnt_shared(mnt);
+
+ /* stick the duplicate mount on the same expiry list
+ * as the original if that was on one */
+ if (flag & CL_EXPIRE) {
+ if (!list_empty(&old->mnt_expire))
+ list_add(&mnt->mnt_expire, &old->mnt_expire);
}
+
return mnt;
out_free:
free_vfsmnt(mnt);
- return NULL;
+ return ERR_PTR(err);
}
static inline void mntfree(struct mount *mnt)
@@ -1242,11 +1246,12 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
struct path path;
if (!(flag & CL_COPY_ALL) && IS_MNT_UNBINDABLE(mnt))
- return NULL;
+ return ERR_PTR(-EINVAL);
res = q = clone_mnt(mnt, dentry, flag);
- if (!q)
- goto Enomem;
+ if (IS_ERR(q))
+ return q;
+
q->mnt_mountpoint = mnt->mnt_mountpoint;
p = mnt;
@@ -1268,8 +1273,8 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
path.mnt = &q->mnt;
path.dentry = p->mnt_mountpoint;
q = clone_mnt(p, p->mnt.mnt_root, flag);
- if (!q)
- goto Enomem;
+ if (IS_ERR(q))
+ goto out;
br_write_lock(&vfsmount_lock);
list_add_tail(&q->mnt_list, &res->mnt_list);
attach_mnt(q, &path);
@@ -1277,7 +1282,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
}
}
return res;
-Enomem:
+out:
if (res) {
LIST_HEAD(umount_list);
br_write_lock(&vfsmount_lock);
@@ -1285,9 +1290,11 @@ Enomem:
br_write_unlock(&vfsmount_lock);
release_mounts(&umount_list);
}
- return NULL;
+ return q;
}
+/* Caller should check returned pointer for errors */
+
struct vfsmount *collect_mounts(struct path *path)
{
struct mount *tree;
@@ -1295,7 +1302,9 @@ struct vfsmount *collect_mounts(struct path *path)
tree = copy_tree(real_mount(path->mnt), path->dentry,
CL_COPY_ALL | CL_PRIVATE);
up_write(&namespace_sem);
- return tree ? &tree->mnt : NULL;
+ if (IS_ERR(tree))
+ return NULL;
+ return &tree->mnt;
}
void drop_collected_mounts(struct vfsmount *mnt)
@@ -1590,14 +1599,15 @@ static int do_loopback(struct path *path, char *old_name,
if (!check_mnt(real_mount(path->mnt)) || !check_mnt(old))
goto out2;
- err = -ENOMEM;
if (recurse)
mnt = copy_tree(old, old_path.dentry, 0);
else
mnt = clone_mnt(old, old_path.dentry, 0);
- if (!mnt)
- goto out2;
+ if (IS_ERR(mnt)) {
+ err = PTR_ERR(mnt);
+ goto out;
+ }
err = graft_tree(mnt, path);
if (err) {
@@ -2211,10 +2221,10 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
down_write(&namespace_sem);
/* First pass: copy the tree topology */
new = copy_tree(old, old->mnt.mnt_root, CL_COPY_ALL | CL_EXPIRE);
- if (!new) {
+ if (IS_ERR(new)) {
up_write(&namespace_sem);
kfree(new_ns);
- return ERR_PTR(-ENOMEM);
+ return ERR_CAST(new);
}
new_ns->root = new;
br_write_lock(&vfsmount_lock);
diff --git a/fs/pnode.c b/fs/pnode.c
index bed378db075..3e000a51ac0 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -237,8 +237,9 @@ int propagate_mnt(struct mount *dest_mnt, struct dentry *dest_dentry,
source = get_source(m, prev_dest_mnt, prev_src_mnt, &type);
- if (!(child = copy_tree(source, source->mnt.mnt_root, type))) {
- ret = -ENOMEM;
+ child = copy_tree(source, source->mnt.mnt_root, type);
+ if (IS_ERR(child)) {
+ ret = PTR_ERR(child);
list_splice(tree_list, tmp_list.prev);
goto out;
}
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 5bf0790497e..3a5ca582ba1 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -595,7 +595,7 @@ void audit_trim_trees(void)
root_mnt = collect_mounts(&path);
path_put(&path);
- if (!root_mnt)
+ if (IS_ERR(root_mnt))
goto skip_it;
spin_lock(&hash_lock);
@@ -669,8 +669,8 @@ int audit_add_tree_rule(struct audit_krule *rule)
goto Err;
mnt = collect_mounts(&path);
path_put(&path);
- if (!mnt) {
- err = -ENOMEM;
+ if (IS_ERR(mnt)) {
+ err = PTR_ERR(mnt);
goto Err;
}
@@ -719,8 +719,8 @@ int audit_tag_tree(char *old, char *new)
return err;
tagged = collect_mounts(&path2);
path_put(&path2);
- if (!tagged)
- return -ENOMEM;
+ if (IS_ERR(tagged))
+ return PTR_ERR(tagged);
err = kern_path(old, 0, &path1);
if (err) {
--
cgit v1.2.3-70-g09d2
From f015f1267b23d3530d3f874243fb83cb5f443005 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Mon, 25 Jun 2012 12:55:28 +0100
Subject: VFS: Comment mount following code
Add comments describing what the directions "up" and "down" mean and ref count
handling to the VFS mount following family of functions.
Signed-off-by: Valerie Aurora <vaurora@redhat.com> (Original author)
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 10 ++++++++++
fs/namespace.c | 16 ++++++++++++++--
2 files changed, 24 insertions(+), 2 deletions(-)
(limited to 'fs')
diff --git a/fs/namei.c b/fs/namei.c
index 0e1b9c3eb36..c6dcb4c8f86 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -672,6 +672,16 @@ static int follow_up_rcu(struct path *path)
return 1;
}
+/*
+ * follow_up - Find the mountpoint of path's vfsmount
+ *
+ * Given a path, find the mountpoint of its source file system.
+ * Replace @path with the path of the mountpoint in the parent mount.
+ * Up is towards /.
+ *
+ * Return 1 if we went up a level and 0 if we were already at the
+ * root.
+ */
int follow_up(struct path *path)
{
struct mount *mnt = real_mount(path->mnt);
diff --git a/fs/namespace.c b/fs/namespace.c
index be1b07a774f..c53d3381b0d 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -515,8 +515,20 @@ struct mount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry,
}
/*
- * lookup_mnt increments the ref count before returning
- * the vfsmount struct.
+ * lookup_mnt - Return the first child mount mounted at path
+ *
+ * "First" means first mounted chronologically. If you create the
+ * following mounts:
+ *
+ * mount /dev/sda1 /mnt
+ * mount /dev/sda2 /mnt
+ * mount /dev/sda3 /mnt
+ *
+ * Then lookup_mnt() on the base /mnt dentry in the root mount will
+ * return successively the root dentry and vfsmount of /dev/sda1, then
+ * /dev/sda2, then /dev/sda3, then NULL.
+ *
+ * lookup_mnt takes a reference to the found vfsmount.
*/
struct vfsmount *lookup_mnt(struct path *path)
{
--
cgit v1.2.3-70-g09d2
From 9249e17fe094d853d1ef7475dd559a2cc7e23d42 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Mon, 25 Jun 2012 12:55:37 +0100
Subject: VFS: Pass mount flags to sget()
Pass mount flags to sget() so that it can use them in initialising a new
superblock before the set function is called. They could also be passed to the
compare function.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
drivers/mtd/mtdsuper.c | 4 +---
fs/9p/vfs_super.c | 4 ++--
fs/afs/super.c | 3 +--
fs/btrfs/super.c | 4 ++--
fs/ceph/super.c | 2 +-
fs/cifs/cifsfs.c | 9 ++++-----
fs/devpts/inode.c | 6 +++---
fs/ecryptfs/main.c | 3 +--
fs/gfs2/ops_fstype.c | 5 ++---
fs/libfs.c | 4 ++--
fs/logfs/super.c | 3 +--
fs/nfs/super.c | 2 +-
fs/nilfs2/super.c | 4 ++--
fs/proc/root.c | 3 +--
fs/reiserfs/procfs.c | 2 +-
fs/super.c | 22 +++++++++++-----------
fs/sysfs/mount.c | 3 +--
fs/ubifs/super.c | 3 +--
include/linux/fs.h | 2 +-
kernel/cgroup.c | 2 +-
20 files changed, 40 insertions(+), 50 deletions(-)
(limited to 'fs')
diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index a90bfe79916..334da5f583c 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -63,7 +63,7 @@ static struct dentry *mount_mtd_aux(struct file_system_type *fs_type, int flags,
struct super_block *sb;
int ret;
- sb = sget(fs_type, get_sb_mtd_compare, get_sb_mtd_set, mtd);
+ sb = sget(fs_type, get_sb_mtd_compare, get_sb_mtd_set, flags, mtd);
if (IS_ERR(sb))
goto out_error;
@@ -74,8 +74,6 @@ static struct dentry *mount_mtd_aux(struct file_system_type *fs_type, int flags,
pr_debug("MTDSB: New superblock for device %d (\"%s\")\n",
mtd->index, mtd->name);
- sb->s_flags = flags;
-
ret = fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (ret < 0) {
deactivate_locked_super(sb);
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 8c92a9ba833..137d5039689 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -89,7 +89,7 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
if (v9ses->cache)
sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_CACHE_SIZE;
- sb->s_flags = flags | MS_ACTIVE | MS_DIRSYNC | MS_NOATIME;
+ sb->s_flags |= MS_ACTIVE | MS_DIRSYNC | MS_NOATIME;
if (!v9ses->cache)
sb->s_flags |= MS_SYNCHRONOUS;
@@ -137,7 +137,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
goto close_session;
}
- sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
+ sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses);
if (IS_ERR(sb)) {
retval = PTR_ERR(sb);
goto clunk_fid;
diff --git a/fs/afs/super.c b/fs/afs/super.c
index f02b31e7e64..df8c6047c2a 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -395,7 +395,7 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
as->volume = vol;
/* allocate a deviceless superblock */
- sb = sget(fs_type, afs_test_super, afs_set_super, as);
+ sb = sget(fs_type, afs_test_super, afs_set_super, flags, as);
if (IS_ERR(sb)) {
ret = PTR_ERR(sb);
afs_put_volume(vol);
@@ -406,7 +406,6 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
if (!sb->s_root) {
/* initial superblock/root creation */
_debug("create");
- sb->s_flags = flags;
ret = afs_fill_super(sb, ¶ms);
if (ret < 0) {
deactivate_locked_super(sb);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index e23991574fd..b19d7556772 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1068,7 +1068,8 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
}
bdev = fs_devices->latest_bdev;
- s = sget(fs_type, btrfs_test_super, btrfs_set_super, fs_info);
+ s = sget(fs_type, btrfs_test_super, btrfs_set_super, flags | MS_NOSEC,
+ fs_info);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto error_close_devices;
@@ -1082,7 +1083,6 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
} else {
char b[BDEVNAME_SIZE];
- s->s_flags = flags | MS_NOSEC;
strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
btrfs_sb(s)->bdev_holder = fs_type;
error = btrfs_fill_super(s, fs_devices, data,
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 1e67dd7305a..7076109f014 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -871,7 +871,7 @@ static struct dentry *ceph_mount(struct file_system_type *fs_type,
if (ceph_test_opt(fsc->client, NOSHARE))
compare_super = NULL;
- sb = sget(fs_type, compare_super, ceph_set_super, fsc);
+ sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc);
if (IS_ERR(sb)) {
res = ERR_CAST(sb);
goto out;
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index c0c2751a757..a7610cfedf0 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -637,7 +637,10 @@ cifs_do_mount(struct file_system_type *fs_type,
mnt_data.cifs_sb = cifs_sb;
mnt_data.flags = flags;
- sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
+ /* BB should we make this contingent on mount parm? */
+ flags |= MS_NODIRATIME | MS_NOATIME;
+
+ sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
if (IS_ERR(sb)) {
root = ERR_CAST(sb);
cifs_umount(cifs_sb);
@@ -648,10 +651,6 @@ cifs_do_mount(struct file_system_type *fs_type,
cFYI(1, "Use existing superblock");
cifs_umount(cifs_sb);
} else {
- sb->s_flags = flags;
- /* BB should we make this contingent on mount parm? */
- sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
-
rc = cifs_read_super(sb);
if (rc) {
root = ERR_PTR(rc);
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 979c1e309c7..14afbabe654 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -439,15 +439,15 @@ static struct dentry *devpts_mount(struct file_system_type *fs_type,
return ERR_PTR(error);
if (opts.newinstance)
- s = sget(fs_type, NULL, set_anon_super, NULL);
+ s = sget(fs_type, NULL, set_anon_super, flags, NULL);
else
- s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
+ s = sget(fs_type, compare_init_pts_sb, set_anon_super, flags,
+ NULL);
if (IS_ERR(s))
return ERR_CAST(s);
if (!s->s_root) {
- s->s_flags = flags;
error = devpts_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
if (error)
goto out_undo_sget;
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 68954937a07..7edeb3d893c 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -499,13 +499,12 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
goto out;
}
- s = sget(fs_type, NULL, set_anon_super, NULL);
+ s = sget(fs_type, NULL, set_anon_super, flags, NULL);
if (IS_ERR(s)) {
rc = PTR_ERR(s);
goto out;
}
- s->s_flags = flags;
rc = bdi_setup_and_register(&sbi->bdi, "ecryptfs", BDI_CAP_MAP_COPY);
if (rc)
goto out1;
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index b8c250fc492..6c906078f65 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1286,7 +1286,7 @@ static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
error = -EBUSY;
goto error_bdev;
}
- s = sget(fs_type, test_gfs2_super, set_gfs2_super, bdev);
+ s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev);
mutex_unlock(&bdev->bd_fsfreeze_mutex);
error = PTR_ERR(s);
if (IS_ERR(s))
@@ -1316,7 +1316,6 @@ static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
} else {
char b[BDEVNAME_SIZE];
- s->s_flags = flags;
s->s_mode = mode;
strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(bdev));
@@ -1360,7 +1359,7 @@ static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type,
dev_name, error);
return ERR_PTR(error);
}
- s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super,
+ s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags,
path.dentry->d_inode->i_sb->s_bdev);
path_put(&path);
if (IS_ERR(s)) {
diff --git a/fs/libfs.c b/fs/libfs.c
index ebd03f6910d..a74cb1725ac 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -222,15 +222,15 @@ struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
const struct super_operations *ops,
const struct dentry_operations *dops, unsigned long magic)
{
- struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *s;
struct dentry *dentry;
struct inode *root;
struct qstr d_name = QSTR_INIT(name, strlen(name));
+ s = sget(fs_type, NULL, set_anon_super, MS_NOUSER, NULL);
if (IS_ERR(s))
return ERR_CAST(s);
- s->s_flags = MS_NOUSER;
s->s_maxbytes = MAX_LFS_FILESIZE;
s->s_blocksize = PAGE_SIZE;
s->s_blocksize_bits = PAGE_SHIFT;
diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index 97bca623d89..345c24b8a6f 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -519,7 +519,7 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super,
log_super("LogFS: Start mount %x\n", mount_count++);
err = -EINVAL;
- sb = sget(type, logfs_sb_test, logfs_sb_set, super);
+ sb = sget(type, logfs_sb_test, logfs_sb_set, flags | MS_NOATIME, super);
if (IS_ERR(sb)) {
super->s_devops->put_device(super);
kfree(super);
@@ -542,7 +542,6 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super,
sb->s_maxbytes = (1ull << 43) - 1;
sb->s_max_links = LOGFS_LINK_MAX;
sb->s_op = &logfs_super_operations;
- sb->s_flags = flags | MS_NOATIME;
err = logfs_read_sb(sb, sb->s_flags & MS_RDONLY);
if (err)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 06228192f64..8b2a2977b72 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2419,7 +2419,7 @@ static struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
sb_mntdata.mntflags |= MS_SYNCHRONOUS;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
+ s = sget(fs_type, compare_super, nfs_set_super, flags, &sb_mntdata);
if (IS_ERR(s)) {
mntroot = ERR_CAST(s);
goto out_err_nosb;
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 1099a76cee5..d57c42f974e 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1288,7 +1288,8 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
err = -EBUSY;
goto failed;
}
- s = sget(fs_type, nilfs_test_bdev_super, nilfs_set_bdev_super, sd.bdev);
+ s = sget(fs_type, nilfs_test_bdev_super, nilfs_set_bdev_super, flags,
+ sd.bdev);
mutex_unlock(&sd.bdev->bd_fsfreeze_mutex);
if (IS_ERR(s)) {
err = PTR_ERR(s);
@@ -1301,7 +1302,6 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
s_new = true;
/* New superblock instance created */
- s->s_flags = flags;
s->s_mode = mode;
strlcpy(s->s_id, bdevname(sd.bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(sd.bdev));
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 568b20290c7..9a2d9fd7cad 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -111,7 +111,7 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
options = data;
}
- sb = sget(fs_type, proc_test_super, proc_set_super, ns);
+ sb = sget(fs_type, proc_test_super, proc_set_super, flags, ns);
if (IS_ERR(sb))
return ERR_CAST(sb);
@@ -121,7 +121,6 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
}
if (!sb->s_root) {
- sb->s_flags = flags;
err = proc_fill_super(sb);
if (err) {
deactivate_locked_super(sb);
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 2c1ade692cc..e60e87035bb 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -403,7 +403,7 @@ static void *r_start(struct seq_file *m, loff_t * pos)
if (l)
return NULL;
- if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
+ if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, 0, s)))
return NULL;
up_write(&s->s_umount);
diff --git a/fs/super.c b/fs/super.c
index cf001775617..c743fb3be4b 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -105,11 +105,12 @@ static int prune_super(struct shrinker *shrink, struct shrink_control *sc)
/**
* alloc_super - create new superblock
* @type: filesystem type superblock should belong to
+ * @flags: the mount flags
*
* Allocates and initializes a new &struct super_block. alloc_super()
* returns a pointer new superblock or %NULL if allocation had failed.
*/
-static struct super_block *alloc_super(struct file_system_type *type)
+static struct super_block *alloc_super(struct file_system_type *type, int flags)
{
struct super_block *s = kzalloc(sizeof(struct super_block), GFP_USER);
static const struct super_operations default_op;
@@ -136,6 +137,7 @@ static struct super_block *alloc_super(struct file_system_type *type)
#else
INIT_LIST_HEAD(&s->s_files);
#endif
+ s->s_flags = flags;
s->s_bdi = &default_backing_dev_info;
INIT_HLIST_NODE(&s->s_instances);
INIT_HLIST_BL_HEAD(&s->s_anon);
@@ -415,11 +417,13 @@ EXPORT_SYMBOL(generic_shutdown_super);
* @type: filesystem type superblock should belong to
* @test: comparison callback
* @set: setup callback
+ * @flags: mount flags
* @data: argument to each of them
*/
struct super_block *sget(struct file_system_type *type,
int (*test)(struct super_block *,void *),
int (*set)(struct super_block *,void *),
+ int flags,
void *data)
{
struct super_block *s = NULL;
@@ -450,7 +454,7 @@ retry:
}
if (!s) {
spin_unlock(&sb_lock);
- s = alloc_super(type);
+ s = alloc_super(type, flags);
if (!s)
return ERR_PTR(-ENOMEM);
goto retry;
@@ -925,13 +929,12 @@ struct dentry *mount_ns(struct file_system_type *fs_type, int flags,
{
struct super_block *sb;
- sb = sget(fs_type, ns_test_super, ns_set_super, data);
+ sb = sget(fs_type, ns_test_super, ns_set_super, flags, data);
if (IS_ERR(sb))
return ERR_CAST(sb);
if (!sb->s_root) {
int err;
- sb->s_flags = flags;
err = fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (err) {
deactivate_locked_super(sb);
@@ -992,7 +995,8 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
error = -EBUSY;
goto error_bdev;
}
- s = sget(fs_type, test_bdev_super, set_bdev_super, bdev);
+ s = sget(fs_type, test_bdev_super, set_bdev_super, flags | MS_NOSEC,
+ bdev);
mutex_unlock(&bdev->bd_fsfreeze_mutex);
if (IS_ERR(s))
goto error_s;
@@ -1017,7 +1021,6 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
} else {
char b[BDEVNAME_SIZE];
- s->s_flags = flags | MS_NOSEC;
s->s_mode = mode;
strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(bdev));
@@ -1062,13 +1065,11 @@ struct dentry *mount_nodev(struct file_system_type *fs_type,
int (*fill_super)(struct super_block *, void *, int))
{
int error;
- struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
+ struct super_block *s = sget(fs_type, NULL, set_anon_super, flags, NULL);
if (IS_ERR(s))
return ERR_CAST(s);
- s->s_flags = flags;
-
error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
if (error) {
deactivate_locked_super(s);
@@ -1091,11 +1092,10 @@ struct dentry *mount_single(struct file_system_type *fs_type,
struct super_block *s;
int error;
- s = sget(fs_type, compare_single, set_anon_super, NULL);
+ s = sget(fs_type, compare_single, set_anon_super, flags, NULL);
if (IS_ERR(s))
return ERR_CAST(s);
if (!s->s_root) {
- s->s_flags = flags;
error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
if (error) {
deactivate_locked_super(s);
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index c15a7a3572e..71eb7e25392 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -118,13 +118,12 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type,
for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++)
info->ns[type] = kobj_ns_grab_current(type);
- sb = sget(fs_type, sysfs_test_super, sysfs_set_super, info);
+ sb = sget(fs_type, sysfs_test_super, sysfs_set_super, flags, info);
if (IS_ERR(sb) || sb->s_fs_info != info)
free_sysfs_super_info(info);
if (IS_ERR(sb))
return ERR_CAST(sb);
if (!sb->s_root) {
- sb->s_flags = flags;
error = sysfs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (error) {
deactivate_locked_super(sb);
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 5862dd9d278..1c766c39c03 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2136,7 +2136,7 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
dbg_gen("opened ubi%d_%d", c->vi.ubi_num, c->vi.vol_id);
- sb = sget(fs_type, sb_test, sb_set, c);
+ sb = sget(fs_type, sb_test, sb_set, flags, c);
if (IS_ERR(sb)) {
err = PTR_ERR(sb);
kfree(c);
@@ -2153,7 +2153,6 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
goto out_deact;
}
} else {
- sb->s_flags = flags;
err = ubifs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (err)
goto out_deact;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2f857e9eeb3..48548bdd772 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1914,7 +1914,7 @@ void free_anon_bdev(dev_t);
struct super_block *sget(struct file_system_type *type,
int (*test)(struct super_block *,void *),
int (*set)(struct super_block *,void *),
- void *data);
+ int flags, void *data);
extern struct dentry *mount_pseudo(struct file_system_type *, char *,
const struct super_operations *ops,
const struct dentry_operations *dops,
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 0cd1314acda..af2b5641fc8 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1587,7 +1587,7 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type,
opts.new_root = new_root;
/* Locate an existing or new sb for this hierarchy */
- sb = sget(fs_type, cgroup_test_super, cgroup_set_super, &opts);
+ sb = sget(fs_type, cgroup_test_super, cgroup_set_super, 0, &opts);
if (IS_ERR(sb)) {
ret = PTR_ERR(sb);
cgroup_drop_root(opts.new_root);
--
cgit v1.2.3-70-g09d2