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lockd: eliminate duplicate nlmsvc_lookup_host call from nlmsvc_lock 

nlmsvc_lock calls nlmsvc_lookup_host to find a nlm_host struct. The
callers of this function, however, call nlmsvc_retrieve_args or
nlm4svc_retrieve_args, which also return a nlm_host struct.

Change nlmsvc_lock to take a host arg instead of calling
nlmsvc_lookup_host itself and change the callers to pass a pointer to
the nlm_host they've already found.

Since nlmsvc_testlock() now just uses the caller's reference, we no
longer need to get or release it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Jeff Layton 2008-07-15 14:26:17 -04:00 committed by J. Bruce Fields
parent 8f920d5e29
commit 6cde4de807
4 changed files with 6 additions and 11 deletions
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2
fs/lockd/svc4proc.c
View File

@ -145,7 +145,7 @@ nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
#endif
/* Now try to lock the file */
resp->status = nlmsvc_lock(rqstp, file, &argp->lock,
resp->status = nlmsvc_lock(rqstp, file, host, &argp->lock,
argp->block, &argp->cookie);
if (resp->status == nlm_drop_reply)
rc = rpc_drop_reply;

10
fs/lockd/svclock.c
View File

@ -358,10 +358,10 @@ nlmsvc_defer_lock_rqst(struct svc_rqst *rqstp, struct nlm_block *block)
*/
__be32
nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
struct nlm_lock *lock, int wait, struct nlm_cookie *cookie)
struct nlm_host *host, struct nlm_lock *lock, int wait,
struct nlm_cookie *cookie)
{
struct nlm_block *block = NULL;
struct nlm_host *host;
int error;
__be32 ret;
@ -373,11 +373,6 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
(long long)lock->fl.fl_end,
wait);
/* Create host handle for callback */
host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len);
if (host == NULL)
return nlm_lck_denied_nolocks;
/* Lock file against concurrent access */
mutex_lock(&file->f_mutex);
/* Get existing block (in case client is busy-waiting)
@ -450,7 +445,6 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
out:
mutex_unlock(&file->f_mutex);
nlmsvc_release_block(block);
nlm_release_host(host);
dprintk("lockd: nlmsvc_lock returned %u\n", ret);
return ret;
}

2
fs/lockd/svcproc.c
View File

@ -175,7 +175,7 @@ nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
#endif
/* Now try to lock the file */
resp->status = cast_status(nlmsvc_lock(rqstp, file, &argp->lock,
resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
argp->block, &argp->cookie));
if (resp->status == nlm_drop_reply)
rc = rpc_drop_reply;

3
include/linux/lockd/lockd.h
View File

@ -200,7 +200,8 @@ typedef int (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref);
* Server-side lock handling
*/
__be32 nlmsvc_lock(struct svc_rqst *, struct nlm_file *,
struct nlm_lock *, int, struct nlm_cookie *);
struct nlm_host *, struct nlm_lock *, int,
struct nlm_cookie *);
__be32 nlmsvc_unlock(struct nlm_file *, struct nlm_lock *);
__be32 nlmsvc_testlock(struct svc_rqst *, struct nlm_file *,
struct nlm_host *, struct nlm_lock *,