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| author | Chuck Lever <chuck.lever@oracle.com> | 2008-12-04 14:21:31 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-01-06 11:53:52 -0500 |
| commit | c8c23c423dec49cb439697d3dc714e1500ff1610 (patch) | |
| tree | 161035f51e31cce6d9f8dc104bad62a329496a77 | |
| parent | 1e49323c4ab044d05bbc68cf13cadcbd4372468c (diff) | |
| download | linux-c8c23c423dec49cb439697d3dc714e1500ff1610.tar.gz | |
NSM: Release nsmhandle in nlm_destroy_host
The nsm_handle's reference count is bumped in nlm_lookup_host(). It should be decremented in nlm_destroy_host() to make it easier to see the balance of these two operations. Move the nsm_release() call to fs/lockd/host.c. The h_nsmhandle pointer is set in nlm_lookup_host(), and never cleared. The nlm_destroy_host() function is never called for the same nlm_host twice, so h_nsmhandle won't ever be NULL when nsm_unmonitor() is called. All references to the nlm_host are gone before it is freed. We can skip making h_nsmhandle NULL just before the nlm_host is deallocated. It's also likely we can remove the h_nsmhandle NULL check in nlmsvc_is_client() as well, but we can do that later when rearchitect- ing the nlm_host cache. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| -rw-r--r-- | fs/lockd/host.c | 8 | ||||
| -rw-r--r-- | fs/lockd/mon.c | 5 | ||||
| -rw-r--r-- | include/linux/lockd/lockd.h | 1 |
3 files changed, 3 insertions, 11 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 780918acd6f4..1d523c1a7b62 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -37,6 +37,7 @@ static struct nsm_handle *nsm_find(const struct sockaddr *sap, const char *hostname, const size_t hostname_len, const int create); +static void nsm_release(struct nsm_handle *nsm); struct nlm_lookup_host_info { const int server; /* search for server|client */ @@ -263,10 +264,8 @@ nlm_destroy_host(struct nlm_host *host) BUG_ON(!list_empty(&host->h_lockowners)); BUG_ON(atomic_read(&host->h_count)); - /* - * Release NSM handle and unmonitor host. - */ nsm_unmonitor(host); + nsm_release(host->h_nsmhandle); clnt = host->h_rpcclnt; if (clnt != NULL) @@ -711,8 +710,7 @@ found: /* * Release an NSM handle */ -void -nsm_release(struct nsm_handle *nsm) +static void nsm_release(struct nsm_handle *nsm) { if (!nsm) return; diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c index aaaa08e7ae7a..15fab22db028 100644 --- a/fs/lockd/mon.c +++ b/fs/lockd/mon.c @@ -117,10 +117,6 @@ nsm_unmonitor(struct nlm_host *host) struct nsm_res res; int status = 0; - if (nsm == NULL) - return 0; - host->h_nsmhandle = NULL; - if (atomic_read(&nsm->sm_count) == 1 && nsm->sm_monitored && !nsm->sm_sticky) { dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name); @@ -132,7 +128,6 @@ nsm_unmonitor(struct nlm_host *host) else nsm->sm_monitored = 0; } - nsm_release(nsm); return status; } diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index f15a4f5ccbfb..30a6a9c1ce42 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -240,7 +240,6 @@ void nlm_release_host(struct nlm_host *); void nlm_shutdown_hosts(void); extern void nlm_host_rebooted(const struct sockaddr_in *, const char *, unsigned int, u32); -void nsm_release(struct nsm_handle *); /* * Host monitoring |