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-rw-r--r--fs/lockd/clntproc.c64
1 files changed, 54 insertions, 10 deletions
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 749eb5328cb0..a34b709006a1 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -346,10 +346,16 @@ in_grace_period:
/*
* Generic NLM call, async version.
*/
-static int __nlm_async_call(struct nlm_rqst *req, u32 proc, struct rpc_message *msg, const struct rpc_call_ops *tk_ops)
+static struct rpc_task *__nlm_async_call(struct nlm_rqst *req, u32 proc, struct rpc_message *msg, const struct rpc_call_ops *tk_ops)
{
struct nlm_host *host = req->a_host;
struct rpc_clnt *clnt;
+ struct rpc_task_setup task_setup_data = {
+ .rpc_message = msg,
+ .callback_ops = tk_ops,
+ .callback_data = req,
+ .flags = RPC_TASK_ASYNC,
+ };
dprintk("lockd: call procedure %d on %s (async)\n",
(int)proc, host->h_name);
@@ -359,21 +365,36 @@ static int __nlm_async_call(struct nlm_rqst *req, u32 proc, struct rpc_message *
if (clnt == NULL)
goto out_err;
msg->rpc_proc = &clnt->cl_procinfo[proc];
+ task_setup_data.rpc_client = clnt;
/* bootstrap and kick off the async RPC call */
- return rpc_call_async(clnt, msg, RPC_TASK_ASYNC, tk_ops, req);
+ return rpc_run_task(&task_setup_data);
out_err:
tk_ops->rpc_release(req);
- return -ENOLCK;
+ return ERR_PTR(-ENOLCK);
+}
+
+static int nlm_do_async_call(struct nlm_rqst *req, u32 proc, struct rpc_message *msg, const struct rpc_call_ops *tk_ops)
+{
+ struct rpc_task *task;
+
+ task = __nlm_async_call(req, proc, msg, tk_ops);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
+ rpc_put_task(task);
+ return 0;
}
+/*
+ * NLM asynchronous call.
+ */
int nlm_async_call(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops)
{
struct rpc_message msg = {
.rpc_argp = &req->a_args,
.rpc_resp = &req->a_res,
};
- return __nlm_async_call(req, proc, &msg, tk_ops);
+ return nlm_do_async_call(req, proc, &msg, tk_ops);
}
int nlm_async_reply(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops)
@@ -381,7 +402,32 @@ int nlm_async_reply(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *t
struct rpc_message msg = {
.rpc_argp = &req->a_res,
};
- return __nlm_async_call(req, proc, &msg, tk_ops);
+ return nlm_do_async_call(req, proc, &msg, tk_ops);
+}
+
+/*
+ * NLM client asynchronous call.
+ *
+ * Note that although the calls are asynchronous, and are therefore
+ * guaranteed to complete, we still always attempt to wait for
+ * completion in order to be able to correctly track the lock
+ * state.
+ */
+static int nlmclnt_async_call(struct nlm_rqst *req, u32 proc, const struct rpc_call_ops *tk_ops)
+{
+ struct rpc_message msg = {
+ .rpc_argp = &req->a_args,
+ .rpc_resp = &req->a_res,
+ };
+ struct rpc_task *task;
+ int err;
+
+ task = __nlm_async_call(req, proc, &msg, tk_ops);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
+ err = rpc_wait_for_completion_task(task);
+ rpc_put_task(task);
+ return err;
}
/*
@@ -620,10 +666,8 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl)
goto out;
}
- if (req->a_flags & RPC_TASK_ASYNC)
- return nlm_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
-
- status = nlmclnt_call(req, NLMPROC_UNLOCK);
+ atomic_inc(&req->a_count);
+ status = nlmclnt_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
if (status < 0)
goto out;
@@ -697,7 +741,7 @@ static int nlmclnt_cancel(struct nlm_host *host, int block, struct file_lock *fl
nlmclnt_setlockargs(req, fl);
req->a_args.block = block;
- status = nlm_async_call(req, NLMPROC_CANCEL, &nlmclnt_cancel_ops);
+ status = nlmclnt_async_call(req, NLMPROC_CANCEL, &nlmclnt_cancel_ops);
spin_lock_irqsave(&current->sighand->siglock, flags);
current->blocked = oldset;