SUNRPC: Add a function to display the name of an RPC procedure

Improve debugging messages in call_start() and call_verify() by having
them show the RPC procedure name instead of the procedure number.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 19 insertions, 4 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 1af4f161cda8..68ea6dddcf1e 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -690,6 +690,21 @@ rpc_restart_call(struct rpc_task *task)
 }
 EXPORT_SYMBOL_GPL(rpc_restart_call);
 
+#ifdef RPC_DEBUG
+static const char *rpc_proc_name(const struct rpc_task *task)
+{
+        const struct rpc_procinfo *proc = task->tk_msg.rpc_proc;
+
+        if (proc) {
+                if (proc->p_name)
+                        return proc->p_name;
+                else
+                        return "NULL";
+        } else
+                return "no proc";
+}
+#endif
+
 /*
  * 0.  Initial state
  *
@@ -701,9 +716,9 @@ call_start(struct rpc_task *task)
 {
         struct rpc_clnt *clnt = task->tk_client;
 
-        dprintk("RPC: %5u call_start %s%d proc %d (%s)\n", task->tk_pid,
+        dprintk("RPC: %5u call_start %s%d proc %s (%s)\n", task->tk_pid,
                         clnt->cl_protname, clnt->cl_vers,
-                        task->tk_msg.rpc_proc->p_proc,
+                        rpc_proc_name(task),
                         (RPC_IS_ASYNC(task) ? "async" : "sync"));
 
         /* Increment call count */
@@ -1432,10 +1447,10 @@ call_verify(struct rpc_task *task)
                 error = -EPROTONOSUPPORT;
                 goto out_err;
         case RPC_PROC_UNAVAIL:
-                dprintk("RPC: %5u %s: proc %p unsupported by program %u, "
+                dprintk("RPC: %5u %s: proc %s unsupported by program %u, "
                                 "version %u on server %s\n",
                                 task->tk_pid, __func__,
-                                task->tk_msg.rpc_proc,
+                                rpc_proc_name(task),
                                 task->tk_client->cl_prog,
                                 task->tk_client->cl_vers,
                                 task->tk_client->cl_server);