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lockd: make nlmsvc_lock use only posix_lock_file

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Reorganize nlmsvc_lock() to make full use of posix_lock_file(), which does
eveything nlmsvc_lock() needs - no need to call posix_test_lock(),
posix_locks_deadlock(), or posix_block_lock() separately.

Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2006-03-20 13:44:25 -05:00 • committed by Trond Myklebust
parent 5de0e5024a
commit a85f193e2f
1 changed files with 4 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

23
fs/lockd/svclock.c
View file

@ -297,7 +297,6 @@ u32
nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file, nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
struct nlm_lock *lock, int wait, struct nlm_cookie *cookie) struct nlm_lock *lock, int wait, struct nlm_cookie *cookie)
{ {
struct file_lock *conflock;
struct nlm_block *block; struct nlm_block *block;
int error; int error;
u32 ret; u32 ret;
@ -320,14 +319,15 @@ again:
/* Lock file against concurrent access */ /* Lock file against concurrent access */
down(&file->f_sema); down(&file->f_sema);
if (!(conflock = posix_test_lock(file->f_file, &lock->fl))) { error = posix_lock_file(file->f_file, &lock->fl);
error = posix_lock_file(file->f_file, &lock->fl);
dprintk("lockd: posix_lock_file returned %d\n", error);
if (error != -EAGAIN) {
if (block) if (block)
nlmsvc_delete_block(block, 0); nlmsvc_delete_block(block, 0);
up(&file->f_sema); up(&file->f_sema);
dprintk("lockd: posix_lock_file returned %d\n", -error);
switch(-error) { switch(-error) {
case 0: case 0:
ret = nlm_granted; ret = nlm_granted;
@ -335,9 +335,6 @@ again:
case EDEADLK: case EDEADLK:
ret = nlm_deadlock; ret = nlm_deadlock;
goto out; goto out;
case EAGAIN:
ret = nlm_lck_denied;
goto out;
default: /* includes ENOLCK */ default: /* includes ENOLCK */
ret = nlm_lck_denied_nolocks; ret = nlm_lck_denied_nolocks;
goto out; goto out;
@ -349,11 +346,6 @@ again:
goto out_unlock; goto out_unlock;
} }
if (posix_locks_deadlock(&lock->fl, conflock)) {
ret = nlm_deadlock;
goto out_unlock;
}
/* If we don't have a block, create and initialize it. Then /* If we don't have a block, create and initialize it. Then
* retry because we may have slept in kmalloc. */ * retry because we may have slept in kmalloc. */
/* We have to release f_sema as nlmsvc_create_block may try to /* We have to release f_sema as nlmsvc_create_block may try to
@ -369,13 +361,6 @@ again:
/* Append to list of blocked */ /* Append to list of blocked */
nlmsvc_insert_block(block, NLM_NEVER); nlmsvc_insert_block(block, NLM_NEVER);
if (list_empty(&block->b_call.a_args.lock.fl.fl_block)) {
/* Now add block to block list of the conflicting lock
if we haven't done so. */
dprintk("lockd: blocking on this lock.\n");
posix_block_lock(conflock, &block->b_call.a_args.lock.fl);
}
ret = nlm_lck_blocked; ret = nlm_lck_blocked;
out_unlock: out_unlock:
up(&file->f_sema); up(&file->f_sema);