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>
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 780918a..1d523c1 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -37,6 +37,7 @@
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 @@
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 @@
/*
* Release an NSM handle
*/
-void
-nsm_release(struct nsm_handle *nsm)
+static void nsm_release(struct nsm_handle *nsm)
{
if (!nsm)
return;
