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authorTrond Myklebust <Trond.Myklebust@netapp.com>2008-04-02 00:58:49 +0200
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-04-19 22:53:36 +0200
commit5e7f37a76fa5b604949020b7317962262812b2dd (patch)
treeceb12f296c0d19374993ac33f306180c1f8dc23a /fs
parentNFSv4: Ensure we don't corrupt fl->fl_flags in nfs4_proc_unlck (diff)
downloadlinux-5e7f37a76fa5b604949020b7317962262812b2dd.tar.xz
linux-5e7f37a76fa5b604949020b7317962262812b2dd.zip
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/lockd/clntproc.c3
1 files changed, 3 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);