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lockd: fix reference count leaks in async locking case

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In a number of places where we wish only to translate nlm_drop_reply to
rpc_drop_reply errors we instead return early with rpc_drop_reply,
skipping some important end-of-function cleanup.

This results in reference count leaks when lockd is doing posix locking
on GFS2.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Oleg Drokin
2007-11-26 13:35:11 -05:00
committed by J. Bruce Fields
parent 404ec117be
commit b7e6b86948
2 changed files with 25 additions and 17 deletions
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22
fs/lockd/svcproc.c
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@@ -113,6 +113,7 @@ nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
{
struct nlm_host *host;
struct nlm_file *file;
int rc = rpc_success;
dprintk("lockd: TEST called\n");
resp->cookie = argp->cookie;
@@ -120,7 +121,7 @@ nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
/* Don't accept test requests during grace period */
if (nlmsvc_grace_period) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
return rc;
}
/* Obtain client and file */
@@ -130,13 +131,14 @@ nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
/* Now check for conflicting locks */
resp->status = cast_status(nlmsvc_testlock(rqstp, file, &argp->lock, &resp->lock, &resp->cookie));
if (resp->status == nlm_drop_reply)
return rpc_drop_reply;
rc = rpc_drop_reply;
else
dprintk("lockd: TEST status %d vers %d\n",
ntohl(resp->status), rqstp->rq_vers);
dprintk("lockd: TEST status %d vers %d\n",
ntohl(resp->status), rqstp->rq_vers);
nlm_release_host(host);
nlm_release_file(file);
return rpc_success;
return rc;
}
static __be32
@@ -145,6 +147,7 @@ nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
{
struct nlm_host *host;
struct nlm_file *file;
int rc = rpc_success;
dprintk("lockd: LOCK called\n");
@@ -153,7 +156,7 @@ nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
/* Don't accept new lock requests during grace period */
if (nlmsvc_grace_period && !argp->reclaim) {
resp->status = nlm_lck_denied_grace_period;
return rpc_success;
return rc;
}
/* Obtain client and file */
@@ -176,12 +179,13 @@ nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
resp->status = cast_status(nlmsvc_lock(rqstp, file, &argp->lock,
argp->block, &argp->cookie));
if (resp->status == nlm_drop_reply)
return rpc_drop_reply;
rc = rpc_drop_reply;
else
dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
nlm_release_host(host);
nlm_release_file(file);
return rpc_success;
return rc;
}
static __be32