SUNRPC: display human-readable procedure name in rpc_iostats output

Add fields to the rpc_procinfo struct that allow the display of a
human-readable name for each procedure in the rpc_iostats output.

Also fix it so that the NFSv4 stats are broken up correctly by
sub-procedure number.  NFSv4 uses only two real RPC procedures:
NULL, and COMPOUND.

Test plan:
Mount with NFSv2, NFSv3, and NFSv4, and do "cat /proc/self/mountstats".

Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 0f3662002ffc..3bec751ee249 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -101,6 +101,8 @@ struct rpc_procinfo {
         unsigned int            p_bufsiz;       /* req. buffer size */
         unsigned int            p_count;        /* call count */
         unsigned int            p_timer;        /* Which RTT timer to use */
+        u32                     p_statidx;      /* Which procedure to account */
+        char *                  p_name;         /* name of procedure */
 };
 
 #define RPC_CONGESTED(clnt)     (RPCXPRT_CONGESTED((clnt)->cl_xprt))