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>

3 files changed, 10 insertions, 2 deletions

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 0edc03e67966..84ee39e6a3a2 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -214,12 +214,16 @@ static struct rpc_procinfo	nsm_procedures[] = {
                 .p_encode       = (kxdrproc_t) xdr_encode_mon,
                 .p_decode       = (kxdrproc_t) xdr_decode_stat_res,
                 .p_bufsiz       = MAX(SM_mon_sz, SM_monres_sz) << 2,
+                .p_statidx      = SM_MON,
+                .p_name         = "MONITOR",
         },
 [SM_UNMON] = {
                 .p_proc         = SM_UNMON,
                 .p_encode       = (kxdrproc_t) xdr_encode_unmon,
                 .p_decode       = (kxdrproc_t) xdr_decode_stat,
                 .p_bufsiz       = MAX(SM_mon_id_sz, SM_unmonres_sz) << 2,
+                .p_statidx      = SM_UNMON,
+                .p_name         = "UNMONITOR",
         },
 };
 
diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 1e984ab14d3f..766ce06146b5 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -546,7 +546,9 @@ nlmclt_decode_res(struct rpc_rqst *req, u32 *p, struct nlm_res *resp)
         .p_proc      = NLMPROC_##proc,                                  \
         .p_encode    = (kxdrproc_t) nlmclt_encode_##argtype,            \
         .p_decode    = (kxdrproc_t) nlmclt_decode_##restype,            \
-        .p_bufsiz    = MAX(NLM_##argtype##_sz, NLM_##restype##_sz) << 2 \
+        .p_bufsiz    = MAX(NLM_##argtype##_sz, NLM_##restype##_sz) << 2,        \
+        .p_statidx   = NLMPROC_##proc,                                  \
+        .p_name      = #proc,                                           \
         }
 
 static struct rpc_procinfo      nlm_procedures[] = {
diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 906ddc203186..36eb175ec335 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -551,7 +551,9 @@ nlm4clt_decode_res(struct rpc_rqst *req, u32 *p, struct nlm_res *resp)
         .p_proc      = NLMPROC_##proc,                                  \
         .p_encode    = (kxdrproc_t) nlm4clt_encode_##argtype,           \
         .p_decode    = (kxdrproc_t) nlm4clt_decode_##restype,           \
-        .p_bufsiz    = MAX(NLM4_##argtype##_sz, NLM4_##restype##_sz) << 2       \
+        .p_bufsiz    = MAX(NLM4_##argtype##_sz, NLM4_##restype##_sz) << 2,      \
+        .p_statidx   = NLMPROC_##proc,                                  \
+        .p_name      = #proc,                                           \
         }
 
 static struct rpc_procinfo      nlm4_procedures[] = {