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authorTrond Myklebust <Trond.Myklebust@netapp.com>2008-04-01 18:58:49 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-04-19 16:53:36 -0400
commit5e7f37a76fa5b604949020b7317962262812b2dd (patch)
treeceb12f296c0d19374993ac33f306180c1f8dc23a
parent536ff0f809b0f4d56e1c41e66768d330668e0a55 (diff)
NLM/lockd: Add a reference counter to struct nlm_rqst
When we replace the existing synchronous RPC calls with asynchronous calls, the reference count will be needed in order to allow us to examine the result of the RPC call. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--fs/lockd/clntproc.c3
-rw-r--r--include/linux/lockd/lockd.h1
2 files changed, 4 insertions, 0 deletions
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 4e1c0123b45d..749eb5328cb0 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -221,6 +221,7 @@ struct nlm_rqst *nlm_alloc_call(struct nlm_host *host)
for(;;) {
call = kzalloc(sizeof(*call), GFP_KERNEL);
if (call != NULL) {
+ atomic_set(&call->a_count, 1);
locks_init_lock(&call->a_args.lock.fl);
locks_init_lock(&call->a_res.lock.fl);
call->a_host = host;
@@ -237,6 +238,8 @@ struct nlm_rqst *nlm_alloc_call(struct nlm_host *host)
void nlm_release_call(struct nlm_rqst *call)
{
+ if (!atomic_dec_and_test(&call->a_count))
+ return;
nlm_release_host(call->a_host);
nlmclnt_release_lockargs(call);
kfree(call);
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index acf39e1e3a3d..94649a8da014 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -91,6 +91,7 @@ struct nlm_wait;
*/
#define NLMCLNT_OHSIZE ((__NEW_UTS_LEN) + 10u)
struct nlm_rqst {
+ atomic_t a_count;
unsigned int a_flags; /* initial RPC task flags */
struct nlm_host * a_host; /* host handle */
struct nlm_args a_args; /* arguments */