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cifs: remove the retry in cifs_poxis_lock_set

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The caller of cifs_posix_lock_set will do retry(like
fcntl_setlk64->do_lock_file_wait) if we will wait for any file_lock.
So the retry in cifs_poxis_lock_set seems duplicated, remove it to
make a cleanup.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: NeilBrown <neilb@suse.de>
This commit is contained in:
yangerkun 2020-07-02 15:25:26 +08:00 committed by Steve French
parent 4ef9b4f1a7
commit 2e98c01846
1 changed files with 6 additions and 13 deletions
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19
fs/cifs/file.c
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@ -1149,20 +1149,20 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock)
/*
* Set the byte-range lock (posix style). Returns:
* 1) 0, if we set the lock and don't need to request to the server;
* 2) 1, if we need to request to the server;
* 3) <0, if the error occurs while setting the lock.
* 1) <0, if the error occurs while setting the lock;
* 2) 0, if we set the lock and don't need to request to the server;
* 3) FILE_LOCK_DEFERRED, if we will wait for some other file_lock;
* 4) FILE_LOCK_DEFERRED + 1, if we need to request to the server.
*/
static int
cifs_posix_lock_set(struct file *file, struct file_lock *flock)
{
struct cifsInodeInfo *cinode = CIFS_I(file_inode(file));
int rc = 1;
int rc = FILE_LOCK_DEFERRED + 1;
if ((flock->fl_flags & FL_POSIX) == 0)
return rc;
try_again:
cifs_down_write(&cinode->lock_sem);
if (!cinode->can_cache_brlcks) {
up_write(&cinode->lock_sem);
@ -1171,13 +1171,6 @@ try_again:
rc = posix_lock_file(file, flock, NULL);
up_write(&cinode->lock_sem);
if (rc == FILE_LOCK_DEFERRED) {
rc = wait_event_interruptible(flock->fl_wait,
list_empty(&flock->fl_blocked_member));
if (!rc)
goto try_again;
locks_delete_block(flock);
}
return rc;
}
@ -1652,7 +1645,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
int posix_lock_type;
rc = cifs_posix_lock_set(file, flock);
if (!rc || rc < 0)
if (rc <= FILE_LOCK_DEFERRED)
return rc;
if (type & server->vals->shared_lock_type)