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fuse: misc cleanups

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* fuse_file_alloc() was structured in weird way.  The success path was
  split between else block and code following the block.  Restructure
  the code such that it's easier to read and modify.

* Unindent success path of fuse_release_common() to ease future
  changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Tejun Heo 2009-04-14 10:54:49 +09:00 committed by Miklos Szeredi
parent fd9db72977
commit 6b2db28a7a
1 changed files with 44 additions and 37 deletions
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81
fs/fuse/file.c
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@ -49,22 +49,26 @@ static int fuse_send_open(struct inode *inode, struct file *file, int isdir,
struct fuse_file *fuse_file_alloc(struct fuse_conn *fc)
{
struct fuse_file *ff;
ff = kmalloc(sizeof(struct fuse_file), GFP_KERNEL);
if (ff) {
ff->reserved_req = fuse_request_alloc();
if (!ff->reserved_req) {
kfree(ff);
return NULL;
} else {
INIT_LIST_HEAD(&ff->write_entry);
atomic_set(&ff->count, 0);
spin_lock(&fc->lock);
ff->kh = ++fc->khctr;
spin_unlock(&fc->lock);
}
RB_CLEAR_NODE(&ff->polled_node);
init_waitqueue_head(&ff->poll_wait);
if (unlikely(!ff))
return NULL;
ff->reserved_req = fuse_request_alloc();
if (unlikely(!ff->reserved_req)) {
kfree(ff);
return NULL;
}
INIT_LIST_HEAD(&ff->write_entry);
atomic_set(&ff->count, 0);
RB_CLEAR_NODE(&ff->polled_node);
init_waitqueue_head(&ff->poll_wait);
spin_lock(&fc->lock);
ff->kh = ++fc->khctr;
spin_unlock(&fc->lock);
return ff;
}
@ -158,34 +162,37 @@ void fuse_release_fill(struct fuse_file *ff, u64 nodeid, int flags, int opcode)
int fuse_release_common(struct inode *inode, struct file *file, int isdir)
{
struct fuse_file *ff = file->private_data;
if (ff) {
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req = ff->reserved_req;
struct fuse_conn *fc;
struct fuse_file *ff;
struct fuse_req *req;
fuse_release_fill(ff, get_node_id(inode), file->f_flags,
isdir ? FUSE_RELEASEDIR : FUSE_RELEASE);
ff = file->private_data;
if (unlikely(!ff))
return 0; /* return value is ignored by VFS */
/* Hold vfsmount and dentry until release is finished */
req->misc.release.vfsmount = mntget(file->f_path.mnt);
req->misc.release.dentry = dget(file->f_path.dentry);
fc = get_fuse_conn(inode);
req = ff->reserved_req;
spin_lock(&fc->lock);
list_del(&ff->write_entry);
if (!RB_EMPTY_NODE(&ff->polled_node))
rb_erase(&ff->polled_node, &fc->polled_files);
spin_unlock(&fc->lock);
fuse_release_fill(ff, get_node_id(inode), file->f_flags,
isdir ? FUSE_RELEASEDIR : FUSE_RELEASE);
wake_up_interruptible_sync(&ff->poll_wait);
/*
* Normally this will send the RELEASE request,
* however if some asynchronous READ or WRITE requests
* are outstanding, the sending will be delayed
*/
fuse_file_put(ff);
}
/* Hold vfsmount and dentry until release is finished */
req->misc.release.vfsmount = mntget(file->f_path.mnt);
req->misc.release.dentry = dget(file->f_path.dentry);
/* Return value is ignored by VFS */
spin_lock(&fc->lock);
list_del(&ff->write_entry);
if (!RB_EMPTY_NODE(&ff->polled_node))
rb_erase(&ff->polled_node, &fc->polled_files);
spin_unlock(&fc->lock);
wake_up_interruptible_sync(&ff->poll_wait);
/*
* Normally this will send the RELEASE request, however if
* some asynchronous READ or WRITE requests are outstanding,
* the sending will be delayed.
*/
fuse_file_put(ff);
return 0;
}