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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

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Pull fuse update from Miklos Szeredi:
 "A bugfix and cleanups"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: release: private_data cannot be NULL
  fuse: cleanup fuse_file refcounting
  fuse: add missing FR_FORCE
This commit is contained in:
Linus Torvalds 2017-03-03 12:14:13 -08:00
commit 4e66c42c60
3 changed files with 13 additions and 18 deletions
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2
fs/fuse/dir.c
View File

@ -473,7 +473,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
if (err) {
fuse_sync_release(ff, flags);
} else {
file->private_data = fuse_file_get(ff);
file->private_data = ff;
fuse_finish_open(inode, file);
}
return err;

28
fs/fuse/file.c
View File

@ -58,7 +58,7 @@ struct fuse_file *fuse_file_alloc(struct fuse_conn *fc)
}
INIT_LIST_HEAD(&ff->write_entry);
atomic_set(&ff->count, 0);
atomic_set(&ff->count, 1);
RB_CLEAR_NODE(&ff->polled_node);
init_waitqueue_head(&ff->poll_wait);
@ -75,7 +75,7 @@ void fuse_file_free(struct fuse_file *ff)
kfree(ff);
}
struct fuse_file *fuse_file_get(struct fuse_file *ff)
static struct fuse_file *fuse_file_get(struct fuse_file *ff)
{
atomic_inc(&ff->count);
return ff;
@ -100,6 +100,7 @@ static void fuse_file_put(struct fuse_file *ff, bool sync)
iput(req->misc.release.inode);
fuse_put_request(ff->fc, req);
} else if (sync) {
__set_bit(FR_FORCE, &req->flags);
__clear_bit(FR_BACKGROUND, &req->flags);
fuse_request_send(ff->fc, req);
iput(req->misc.release.inode);
@ -146,7 +147,7 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
ff->open_flags &= ~FOPEN_DIRECT_IO;
ff->nodeid = nodeid;
file->private_data = fuse_file_get(ff);
file->private_data = ff;
return 0;
}
@ -245,14 +246,9 @@ static void fuse_prepare_release(struct fuse_file *ff, int flags, int opcode)
void fuse_release_common(struct file *file, int opcode)
{
struct fuse_file *ff;
struct fuse_req *req;
struct fuse_file *ff = file->private_data;
struct fuse_req *req = ff->reserved_req;
ff = file->private_data;
if (unlikely(!ff))
return;
req = ff->reserved_req;
fuse_prepare_release(ff, file->f_flags, opcode);
if (ff->flock) {
@ -297,13 +293,13 @@ static int fuse_release(struct inode *inode, struct file *file)
void fuse_sync_release(struct fuse_file *ff, int flags)
{
WARN_ON(atomic_read(&ff->count) > 1);
WARN_ON(atomic_read(&ff->count) != 1);
fuse_prepare_release(ff, flags, FUSE_RELEASE);
__set_bit(FR_FORCE, &ff->reserved_req->flags);
__clear_bit(FR_BACKGROUND, &ff->reserved_req->flags);
fuse_request_send(ff->fc, ff->reserved_req);
fuse_put_request(ff->fc, ff->reserved_req);
kfree(ff);
/*
* iput(NULL) is a no-op and since the refcount is 1 and everything's
* synchronous, we are fine with not doing igrab() here"
*/
fuse_file_put(ff, true);
}
EXPORT_SYMBOL_GPL(fuse_sync_release);

1
fs/fuse/fuse_i.h
View File

@ -732,7 +732,6 @@ void fuse_read_fill(struct fuse_req *req, struct file *file,
int fuse_open_common(struct inode *inode, struct file *file, bool isdir);
struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
struct fuse_file *fuse_file_get(struct fuse_file *ff);
void fuse_file_free(struct fuse_file *ff);
void fuse_finish_open(struct inode *inode, struct file *file);