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-rw-r--r--drivers/infiniband/hw/ipath/ipath_fs.c8
-rw-r--r--drivers/infiniband/hw/qib/qib_fs.c5
-rw-r--r--drivers/mtd/mtdchar.c2
-rw-r--r--drivers/staging/autofs/root.c7
-rw-r--r--drivers/staging/pohmelfs/inode.c9
-rw-r--r--drivers/staging/pohmelfs/path_entry.c17
-rw-r--r--drivers/staging/smbfs/cache.c16
-rw-r--r--drivers/staging/smbfs/dir.c50
-rw-r--r--drivers/staging/smbfs/file.c5
-rw-r--r--drivers/staging/smbfs/inode.c9
-rw-r--r--drivers/usb/core/inode.c12
11 files changed, 89 insertions, 51 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c
index 8c8afc716b9..31ae1b108ae 100644
--- a/drivers/infiniband/hw/ipath/ipath_fs.c
+++ b/drivers/infiniband/hw/ipath/ipath_fs.c
@@ -277,18 +277,14 @@ static int remove_file(struct dentry *parent, char *name)
goto bail;
}
- spin_lock(&dcache_lock);
spin_lock(&tmp->d_lock);
if (!(d_unhashed(tmp) && tmp->d_inode)) {
- dget_locked(tmp);
+ dget_dlock(tmp);
__d_drop(tmp);
spin_unlock(&tmp->d_lock);
- spin_unlock(&dcache_lock);
simple_unlink(parent->d_inode, tmp);
- } else {
+ } else
spin_unlock(&tmp->d_lock);
- spin_unlock(&dcache_lock);
- }
ret = 0;
bail:
diff --git a/drivers/infiniband/hw/qib/qib_fs.c b/drivers/infiniband/hw/qib/qib_fs.c
index f99bddc0171..df7fa251dcd 100644
--- a/drivers/infiniband/hw/qib/qib_fs.c
+++ b/drivers/infiniband/hw/qib/qib_fs.c
@@ -453,17 +453,14 @@ static int remove_file(struct dentry *parent, char *name)
goto bail;
}
- spin_lock(&dcache_lock);
spin_lock(&tmp->d_lock);
if (!(d_unhashed(tmp) && tmp->d_inode)) {
- dget_locked(tmp);
+ dget_dlock(tmp);
__d_drop(tmp);
spin_unlock(&tmp->d_lock);
- spin_unlock(&dcache_lock);
simple_unlink(parent->d_inode, tmp);
} else {
spin_unlock(&tmp->d_lock);
- spin_unlock(&dcache_lock);
}
ret = 0;
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 4759d827e8c..f511dd15fd3 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1201,7 +1201,7 @@ err_unregister_chdev:
static void __exit cleanup_mtdchar(void)
{
unregister_mtd_user(&mtdchar_notifier);
- mntput(mtd_inode_mnt);
+ mntput_long(mtd_inode_mnt);
unregister_filesystem(&mtd_inodefs_type);
__unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd");
}
diff --git a/drivers/staging/autofs/root.c b/drivers/staging/autofs/root.c
index 0fdec4befd8..bf0e9755da6 100644
--- a/drivers/staging/autofs/root.c
+++ b/drivers/staging/autofs/root.c
@@ -154,13 +154,16 @@ static int try_to_fill_dentry(struct dentry *dentry, struct super_block *sb, str
* yet completely filled in, and revalidate has to delay such
* lookups..
*/
-static int autofs_revalidate(struct dentry * dentry, struct nameidata *nd)
+static int autofs_revalidate(struct dentry *dentry, struct nameidata *nd)
{
struct inode * dir;
struct autofs_sb_info *sbi;
struct autofs_dir_ent *ent;
int res;
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
lock_kernel();
dir = dentry->d_parent->d_inode;
sbi = autofs_sbi(dir->i_sb);
@@ -237,7 +240,7 @@ static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentr
*
* We need to do this before we release the directory semaphore.
*/
- dentry->d_op = &autofs_dentry_operations;
+ d_set_d_op(dentry, &autofs_dentry_operations);
dentry->d_flags |= DCACHE_AUTOFS_PENDING;
d_add(dentry, NULL);
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index 61685ccceda..cc8d2840f9b 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -826,6 +826,13 @@ const struct address_space_operations pohmelfs_aops = {
.set_page_dirty = __set_page_dirty_nobuffers,
};
+static void pohmelfs_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(pohmelfs_inode_cache, POHMELFS_I(inode));
+}
+
/*
* ->detroy_inode() callback. Deletes inode from the caches
* and frees private data.
@@ -842,8 +849,8 @@ static void pohmelfs_destroy_inode(struct inode *inode)
dprintk("%s: pi: %p, inode: %p, ino: %llu.\n",
__func__, pi, &pi->vfs_inode, pi->ino);
- kmem_cache_free(pohmelfs_inode_cache, pi);
atomic_long_dec(&psb->total_inodes);
+ call_rcu(&inode->i_rcu, pohmelfs_i_callback);
}
/*
diff --git a/drivers/staging/pohmelfs/path_entry.c b/drivers/staging/pohmelfs/path_entry.c
index 8ec83d2dffb..400a9fc386a 100644
--- a/drivers/staging/pohmelfs/path_entry.c
+++ b/drivers/staging/pohmelfs/path_entry.c
@@ -83,10 +83,11 @@ out:
int pohmelfs_path_length(struct pohmelfs_inode *pi)
{
struct dentry *d, *root, *first;
- int len = 1; /* Root slash */
+ int len;
+ unsigned seq;
- first = d = d_find_alias(&pi->vfs_inode);
- if (!d) {
+ first = d_find_alias(&pi->vfs_inode);
+ if (!first) {
dprintk("%s: ino: %llu, mode: %o.\n", __func__, pi->ino, pi->vfs_inode.i_mode);
return -ENOENT;
}
@@ -95,7 +96,11 @@ int pohmelfs_path_length(struct pohmelfs_inode *pi)
root = dget(current->fs->root.dentry);
spin_unlock(&current->fs->lock);
- spin_lock(&dcache_lock);
+rename_retry:
+ len = 1; /* Root slash */
+ d = first;
+ seq = read_seqbegin(&rename_lock);
+ rcu_read_lock();
if (!IS_ROOT(d) && d_unhashed(d))
len += UNHASHED_OBSCURE_STRING_SIZE; /* Obscure " (deleted)" string */
@@ -104,7 +109,9 @@ int pohmelfs_path_length(struct pohmelfs_inode *pi)
len += d->d_name.len + 1; /* Plus slash */
d = d->d_parent;
}
- spin_unlock(&dcache_lock);
+ rcu_read_unlock();
+ if (read_seqretry(&rename_lock, seq))
+ goto rename_retry;
dput(root);
dput(first);
diff --git a/drivers/staging/smbfs/cache.c b/drivers/staging/smbfs/cache.c
index dbb98658148..f2a1323ca82 100644
--- a/drivers/staging/smbfs/cache.c
+++ b/drivers/staging/smbfs/cache.c
@@ -62,7 +62,7 @@ smb_invalidate_dircache_entries(struct dentry *parent)
struct list_head *next;
struct dentry *dentry;
- spin_lock(&dcache_lock);
+ spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
dentry = list_entry(next, struct dentry, d_u.d_child);
@@ -70,7 +70,7 @@ smb_invalidate_dircache_entries(struct dentry *parent)
smb_age_dentry(server, dentry);
next = next->next;
}
- spin_unlock(&dcache_lock);
+ spin_unlock(&parent->d_lock);
}
/*
@@ -96,13 +96,13 @@ smb_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
}
/* If a pointer is invalid, we search the dentry. */
- spin_lock(&dcache_lock);
+ spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
dent = list_entry(next, struct dentry, d_u.d_child);
if ((unsigned long)dent->d_fsdata == fpos) {
if (dent->d_inode)
- dget_locked(dent);
+ dget(dent);
else
dent = NULL;
goto out_unlock;
@@ -111,7 +111,7 @@ smb_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
}
dent = NULL;
out_unlock:
- spin_unlock(&dcache_lock);
+ spin_unlock(&parent->d_lock);
return dent;
}
@@ -134,7 +134,7 @@ smb_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
qname->hash = full_name_hash(qname->name, qname->len);
if (dentry->d_op && dentry->d_op->d_hash)
- if (dentry->d_op->d_hash(dentry, qname) != 0)
+ if (dentry->d_op->d_hash(dentry, inode, qname) != 0)
goto end_advance;
newdent = d_lookup(dentry, qname);
@@ -145,8 +145,8 @@ smb_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
goto end_advance;
} else {
hashed = 1;
- memcpy((char *) newdent->d_name.name, qname->name,
- newdent->d_name.len);
+ /* dir i_mutex is locked because we're in readdir */
+ dentry_update_name_case(newdent, qname);
}
if (!newdent->d_inode) {
diff --git a/drivers/staging/smbfs/dir.c b/drivers/staging/smbfs/dir.c
index f088ea2f6ac..dd612f50749 100644
--- a/drivers/staging/smbfs/dir.c
+++ b/drivers/staging/smbfs/dir.c
@@ -14,6 +14,7 @@
#include <linux/ctype.h>
#include <linux/net.h>
#include <linux/sched.h>
+#include <linux/namei.h>
#include "smb_fs.h"
#include "smb_mount.h"
@@ -274,9 +275,13 @@ smb_dir_open(struct inode *dir, struct file *file)
* Dentry operations routines
*/
static int smb_lookup_validate(struct dentry *, struct nameidata *);
-static int smb_hash_dentry(struct dentry *, struct qstr *);
-static int smb_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
-static int smb_delete_dentry(struct dentry *);
+static int smb_hash_dentry(const struct dentry *, const struct inode *,
+ struct qstr *);
+static int smb_compare_dentry(const struct dentry *,
+ const struct inode *,
+ const struct dentry *, const struct inode *,
+ unsigned int, const char *, const struct qstr *);
+static int smb_delete_dentry(const struct dentry *);
static const struct dentry_operations smbfs_dentry_operations =
{
@@ -297,13 +302,20 @@ static const struct dentry_operations smbfs_dentry_operations_case =
* This is the callback when the dcache has a lookup hit.
*/
static int
-smb_lookup_validate(struct dentry * dentry, struct nameidata *nd)
+smb_lookup_validate(struct dentry *dentry, struct nameidata *nd)
{
- struct smb_sb_info *server = server_from_dentry(dentry);
- struct inode * inode = dentry->d_inode;
- unsigned long age = jiffies - dentry->d_time;
+ struct smb_sb_info *server;
+ struct inode *inode;
+ unsigned long age;
int valid;
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ server = server_from_dentry(dentry);
+ inode = dentry->d_inode;
+ age = jiffies - dentry->d_time;
+
/*
* The default validation is based on dentry age:
* we believe in dentries for a few seconds. (But each
@@ -333,7 +345,8 @@ smb_lookup_validate(struct dentry * dentry, struct nameidata *nd)
}
static int
-smb_hash_dentry(struct dentry *dir, struct qstr *this)
+smb_hash_dentry(const struct dentry *dir, const struct inode *inode,
+ struct qstr *this)
{
unsigned long hash;
int i;
@@ -347,14 +360,17 @@ smb_hash_dentry(struct dentry *dir, struct qstr *this)
}
static int
-smb_compare_dentry(struct dentry *dir, struct qstr *a, struct qstr *b)
+smb_compare_dentry(const struct dentry *parent,
+ const struct inode *pinode,
+ const struct dentry *dentry, const struct inode *inode,
+ unsigned int len, const char *str, const struct qstr *name)
{
int i, result = 1;
- if (a->len != b->len)
+ if (len != name->len)
goto out;
- for (i=0; i < a->len; i++) {
- if (tolower(a->name[i]) != tolower(b->name[i]))
+ for (i=0; i < len; i++) {
+ if (tolower(str[i]) != tolower(name->name[i]))
goto out;
}
result = 0;
@@ -367,7 +383,7 @@ out:
* We use this to unhash dentries with bad inodes.
*/
static int
-smb_delete_dentry(struct dentry * dentry)
+smb_delete_dentry(const struct dentry *dentry)
{
if (dentry->d_inode) {
if (is_bad_inode(dentry->d_inode)) {
@@ -390,9 +406,9 @@ smb_new_dentry(struct dentry *dentry)
struct smb_sb_info *server = server_from_dentry(dentry);
if (server->mnt->flags & SMB_MOUNT_CASE)
- dentry->d_op = &smbfs_dentry_operations_case;
+ d_set_d_op(dentry, &smbfs_dentry_operations_case);
else
- dentry->d_op = &smbfs_dentry_operations;
+ d_set_d_op(dentry, &smbfs_dentry_operations);
dentry->d_time = jiffies;
}
@@ -454,9 +470,9 @@ smb_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
add_entry:
server = server_from_dentry(dentry);
if (server->mnt->flags & SMB_MOUNT_CASE)
- dentry->d_op = &smbfs_dentry_operations_case;
+ d_set_d_op(dentry, &smbfs_dentry_operations_case);
else
- dentry->d_op = &smbfs_dentry_operations;
+ d_set_d_op(dentry, &smbfs_dentry_operations);
d_add(dentry, inode);
smb_renew_times(dentry);
diff --git a/drivers/staging/smbfs/file.c b/drivers/staging/smbfs/file.c
index 5dcd19c60eb..31372e7b12d 100644
--- a/drivers/staging/smbfs/file.c
+++ b/drivers/staging/smbfs/file.c
@@ -407,11 +407,14 @@ smb_file_release(struct inode *inode, struct file * file)
* privileges, so we need our own check for this.
*/
static int
-smb_file_permission(struct inode *inode, int mask)
+smb_file_permission(struct inode *inode, int mask, unsigned int flags)
{
int mode = inode->i_mode;
int error = 0;
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+
VERBOSE("mode=%x, mask=%x\n", mode, mask);
/* Look at user permissions */
diff --git a/drivers/staging/smbfs/inode.c b/drivers/staging/smbfs/inode.c
index 540a984bb51..244319dc970 100644
--- a/drivers/staging/smbfs/inode.c
+++ b/drivers/staging/smbfs/inode.c
@@ -62,11 +62,18 @@ static struct inode *smb_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
-static void smb_destroy_inode(struct inode *inode)
+static void smb_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(smb_inode_cachep, SMB_I(inode));
}
+static void smb_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, smb_i_callback);
+}
+
static void init_once(void *foo)
{
struct smb_inode_info *ei = (struct smb_inode_info *) foo;
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index b690aa35df9..1b125c224dc 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -343,17 +343,19 @@ static int usbfs_empty (struct dentry *dentry)
{
struct list_head *list;
- spin_lock(&dcache_lock);
-
+ spin_lock(&dentry->d_lock);
list_for_each(list, &dentry->d_subdirs) {
struct dentry *de = list_entry(list, struct dentry, d_u.d_child);
+
+ spin_lock_nested(&de->d_lock, DENTRY_D_LOCK_NESTED);
if (usbfs_positive(de)) {
- spin_unlock(&dcache_lock);
+ spin_unlock(&de->d_lock);
+ spin_unlock(&dentry->d_lock);
return 0;
}
+ spin_unlock(&de->d_lock);
}
-
- spin_unlock(&dcache_lock);
+ spin_unlock(&dentry->d_lock);
return 1;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 18:39:19 +0000