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-rw-r--r--fs/fuse/dir.c105
1 files changed, 70 insertions, 35 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 8d7546e832e..f85b2a282f1 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1,6 +1,6 @@
/*
FUSE: Filesystem in Userspace
- Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu>
+ Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
@@ -14,6 +14,33 @@
#include <linux/sched.h>
#include <linux/namei.h>
+#if BITS_PER_LONG >= 64
+static inline void fuse_dentry_settime(struct dentry *entry, u64 time)
+{
+ entry->d_time = time;
+}
+
+static inline u64 fuse_dentry_time(struct dentry *entry)
+{
+ return entry->d_time;
+}
+#else
+/*
+ * On 32 bit archs store the high 32 bits of time in d_fsdata
+ */
+static void fuse_dentry_settime(struct dentry *entry, u64 time)
+{
+ entry->d_time = time;
+ entry->d_fsdata = (void *) (unsigned long) (time >> 32);
+}
+
+static u64 fuse_dentry_time(struct dentry *entry)
+{
+ return (u64) entry->d_time +
+ ((u64) (unsigned long) entry->d_fsdata << 32);
+}
+#endif
+
/*
* FUSE caches dentries and attributes with separate timeout. The
* time in jiffies until the dentry/attributes are valid is stored in
@@ -23,10 +50,13 @@
/*
* Calculate the time in jiffies until a dentry/attributes are valid
*/
-static unsigned long time_to_jiffies(unsigned long sec, unsigned long nsec)
+static u64 time_to_jiffies(unsigned long sec, unsigned long nsec)
{
- struct timespec ts = {sec, nsec};
- return jiffies + timespec_to_jiffies(&ts);
+ if (sec || nsec) {
+ struct timespec ts = {sec, nsec};
+ return get_jiffies_64() + timespec_to_jiffies(&ts);
+ } else
+ return 0;
}
/*
@@ -35,7 +65,8 @@ static unsigned long time_to_jiffies(unsigned long sec, unsigned long nsec)
*/
static void fuse_change_timeout(struct dentry *entry, struct fuse_entry_out *o)
{
- entry->d_time = time_to_jiffies(o->entry_valid, o->entry_valid_nsec);
+ fuse_dentry_settime(entry,
+ time_to_jiffies(o->entry_valid, o->entry_valid_nsec));
if (entry->d_inode)
get_fuse_inode(entry->d_inode)->i_time =
time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
@@ -47,7 +78,7 @@ static void fuse_change_timeout(struct dentry *entry, struct fuse_entry_out *o)
*/
void fuse_invalidate_attr(struct inode *inode)
{
- get_fuse_inode(inode)->i_time = jiffies - 1;
+ get_fuse_inode(inode)->i_time = 0;
}
/*
@@ -60,7 +91,7 @@ void fuse_invalidate_attr(struct inode *inode)
*/
static void fuse_invalidate_entry_cache(struct dentry *entry)
{
- entry->d_time = jiffies - 1;
+ fuse_dentry_settime(entry, 0);
}
/*
@@ -79,7 +110,6 @@ static void fuse_lookup_init(struct fuse_req *req, struct inode *dir,
{
req->in.h.opcode = FUSE_LOOKUP;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
@@ -103,7 +133,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
if (inode && is_bad_inode(inode))
return 0;
- else if (time_after(jiffies, entry->d_time)) {
+ else if (fuse_dentry_time(entry) < get_jiffies_64()) {
int err;
struct fuse_entry_out outarg;
struct fuse_conn *fc;
@@ -225,6 +255,20 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
}
/*
+ * Synchronous release for the case when something goes wrong in CREATE_OPEN
+ */
+static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
+ u64 nodeid, int flags)
+{
+ struct fuse_req *req;
+
+ req = fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
+ req->force = 1;
+ request_send(fc, req);
+ fuse_put_request(fc, req);
+}
+
+/*
* Atomic create+open operation
*
* If the filesystem doesn't support this, then fall back to separate
@@ -237,6 +281,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
struct inode *inode;
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_req *req;
+ struct fuse_req *forget_req;
struct fuse_open_in inarg;
struct fuse_open_out outopen;
struct fuse_entry_out outentry;
@@ -247,9 +292,14 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
if (fc->no_create)
return -ENOSYS;
+ forget_req = fuse_get_req(fc);
+ if (IS_ERR(forget_req))
+ return PTR_ERR(forget_req);
+
req = fuse_get_req(fc);
+ err = PTR_ERR(req);
if (IS_ERR(req))
- return PTR_ERR(req);
+ goto out_put_forget_req;
err = -ENOMEM;
ff = fuse_file_alloc();
@@ -262,7 +312,6 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
inarg.mode = mode;
req->in.h.opcode = FUSE_CREATE;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -285,25 +334,23 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
goto out_free_ff;
+ fuse_put_request(fc, req);
inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
&outentry.attr);
- err = -ENOMEM;
if (!inode) {
flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
ff->fh = outopen.fh;
- /* Special release, with inode = NULL, this will
- trigger a 'forget' request when the release is
- complete */
- fuse_send_release(fc, ff, outentry.nodeid, NULL, flags, 0);
- goto out_put_request;
+ fuse_sync_release(fc, ff, outentry.nodeid, flags);
+ fuse_send_forget(fc, forget_req, outentry.nodeid, 1);
+ return -ENOMEM;
}
- fuse_put_request(fc, req);
+ fuse_put_request(fc, forget_req);
d_instantiate(entry, inode);
fuse_change_timeout(entry, &outentry);
file = lookup_instantiate_filp(nd, entry, generic_file_open);
if (IS_ERR(file)) {
ff->fh = outopen.fh;
- fuse_send_release(fc, ff, outentry.nodeid, inode, flags, 0);
+ fuse_sync_release(fc, ff, outentry.nodeid, flags);
return PTR_ERR(file);
}
fuse_finish_open(inode, file, ff, &outopen);
@@ -313,6 +360,8 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
fuse_file_free(ff);
out_put_request:
fuse_put_request(fc, req);
+ out_put_forget_req:
+ fuse_put_request(fc, forget_req);
return err;
}
@@ -328,7 +377,6 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
int err;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
@@ -448,7 +496,6 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry)
req->in.h.opcode = FUSE_UNLINK;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
@@ -480,7 +527,6 @@ static int fuse_rmdir(struct inode *dir, struct dentry *entry)
req->in.h.opcode = FUSE_RMDIR;
req->in.h.nodeid = get_node_id(dir);
- req->inode = dir;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
@@ -510,8 +556,6 @@ static int fuse_rename(struct inode *olddir, struct dentry *oldent,
inarg.newdir = get_node_id(newdir);
req->in.h.opcode = FUSE_RENAME;
req->in.h.nodeid = get_node_id(olddir);
- req->inode = olddir;
- req->inode2 = newdir;
req->in.numargs = 3;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -558,7 +602,6 @@ static int fuse_link(struct dentry *entry, struct inode *newdir,
memset(&inarg, 0, sizeof(inarg));
inarg.oldnodeid = get_node_id(inode);
req->in.h.opcode = FUSE_LINK;
- req->inode2 = inode;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -587,7 +630,6 @@ int fuse_do_getattr(struct inode *inode)
req->in.h.opcode = FUSE_GETATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->out.numargs = 1;
req->out.args[0].size = sizeof(arg);
req->out.args[0].value = &arg;
@@ -655,7 +697,7 @@ static int fuse_revalidate(struct dentry *entry)
if (!fuse_allow_task(fc, current))
return -EACCES;
if (get_node_id(inode) != FUSE_ROOT_ID &&
- time_before_eq(jiffies, fi->i_time))
+ fi->i_time >= get_jiffies_64())
return 0;
return fuse_do_getattr(inode);
@@ -679,7 +721,6 @@ static int fuse_access(struct inode *inode, int mask)
inarg.mask = mask;
req->in.h.opcode = FUSE_ACCESS;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -735,7 +776,7 @@ static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO))
return -EACCES;
- if (nd && (nd->flags & LOOKUP_ACCESS))
+ if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR)))
return fuse_access(inode, mask);
return 0;
}
@@ -820,7 +861,6 @@ static char *read_link(struct dentry *dentry)
}
req->in.h.opcode = FUSE_READLINK;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->out.argvar = 1;
req->out.numargs = 1;
req->out.args[0].size = PAGE_SIZE - 1;
@@ -939,7 +979,6 @@ static int fuse_setattr(struct dentry *entry, struct iattr *attr)
iattr_to_fattr(attr, &inarg);
req->in.h.opcode = FUSE_SETATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -1002,7 +1041,6 @@ static int fuse_setxattr(struct dentry *entry, const char *name,
inarg.flags = flags;
req->in.h.opcode = FUSE_SETXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 3;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -1041,7 +1079,6 @@ static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
inarg.size = size;
req->in.h.opcode = FUSE_GETXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -1091,7 +1128,6 @@ static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
inarg.size = size;
req->in.h.opcode = FUSE_LISTXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
@@ -1135,7 +1171,6 @@ static int fuse_removexattr(struct dentry *entry, const char *name)
req->in.h.opcode = FUSE_REMOVEXATTR;
req->in.h.nodeid = get_node_id(inode);
- req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = strlen(name) + 1;
req->in.args[0].value = name;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-27 21:02:03 +0000