SUNRPC: Convert rpc_clnt->cl_users to a kref
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 424dfdc..254a6e1 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -121,7 +121,6 @@
clnt = kzalloc(sizeof(*clnt), GFP_KERNEL);
if (!clnt)
goto out_err;
- atomic_set(&clnt->cl_users, 0);
atomic_set(&clnt->cl_count, 1);
clnt->cl_parent = clnt;
@@ -157,6 +156,8 @@
clnt->cl_rtt = &clnt->cl_rtt_default;
rpc_init_rtt(&clnt->cl_rtt_default, xprt->timeout.to_initval);
+ kref_init(&clnt->cl_kref);
+
err = rpc_setup_pipedir(clnt, program->pipe_dir_name);
if (err < 0)
goto out_no_path;
@@ -272,10 +273,10 @@
if (!new)
goto out_no_clnt;
atomic_set(&new->cl_count, 1);
- atomic_set(&new->cl_users, 0);
new->cl_metrics = rpc_alloc_iostats(clnt);
if (new->cl_metrics == NULL)
goto out_no_stats;
+ kref_init(&new->cl_kref);
err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name);
if (err != 0)
goto out_no_path;
@@ -311,40 +312,28 @@
int
rpc_shutdown_client(struct rpc_clnt *clnt)
{
- dprintk("RPC: shutting down %s client for %s, tasks=%d\n",
- clnt->cl_protname, clnt->cl_server,
- atomic_read(&clnt->cl_users));
+ dprintk("RPC: shutting down %s client for %s\n",
+ clnt->cl_protname, clnt->cl_server);
- while (atomic_read(&clnt->cl_users) > 0) {
+ while (!list_empty(&clnt->cl_tasks)) {
/* Don't let rpc_release_client destroy us */
clnt->cl_oneshot = 0;
clnt->cl_dead = 0;
rpc_killall_tasks(clnt);
wait_event_timeout(destroy_wait,
- !atomic_read(&clnt->cl_users), 1*HZ);
- }
-
- if (atomic_read(&clnt->cl_users) < 0) {
- printk(KERN_ERR "RPC: rpc_shutdown_client clnt %p tasks=%d\n",
- clnt, atomic_read(&clnt->cl_users));
-#ifdef RPC_DEBUG
- rpc_show_tasks();
-#endif
- BUG();
+ list_empty(&clnt->cl_tasks), 1*HZ);
}
return rpc_destroy_client(clnt);
}
/*
- * Delete an RPC client
+ * Free an RPC client
*/
-int
-rpc_destroy_client(struct rpc_clnt *clnt)
+static void
+rpc_free_client(struct kref *kref)
{
- if (!atomic_dec_and_test(&clnt->cl_count))
- return 1;
- BUG_ON(atomic_read(&clnt->cl_users) != 0);
+ struct rpc_clnt *clnt = container_of(kref, struct rpc_clnt, cl_kref);
dprintk("RPC: destroying %s client for %s\n",
clnt->cl_protname, clnt->cl_server);
@@ -368,23 +357,33 @@
clnt->cl_metrics = NULL;
xprt_put(clnt->cl_xprt);
kfree(clnt);
- return 0;
}
/*
- * Release an RPC client
+ * Release reference to the RPC client
*/
void
rpc_release_client(struct rpc_clnt *clnt)
{
- dprintk("RPC: rpc_release_client(%p, %d)\n",
- clnt, atomic_read(&clnt->cl_users));
+ dprintk("RPC: rpc_release_client(%p)\n", clnt);
- if (!atomic_dec_and_test(&clnt->cl_users))
- return;
- wake_up(&destroy_wait);
+ if (list_empty(&clnt->cl_tasks))
+ wake_up(&destroy_wait);
if (clnt->cl_oneshot || clnt->cl_dead)
rpc_destroy_client(clnt);
+ kref_put(&clnt->cl_kref, rpc_free_client);
+}
+
+/*
+ * Delete an RPC client
+ */
+int
+rpc_destroy_client(struct rpc_clnt *clnt)
+{
+ if (!atomic_dec_and_test(&clnt->cl_count))
+ return 1;
+ kref_put(&clnt->cl_kref, rpc_free_client);
+ return 0;
}
/**