[PATCH] knfsd: nfsd4: add per-operation server stats

Add an nfs4 operations count array to nfsd_stats structure.  The count is
incremented in nfsd4_proc_compound() where all the operations are handled
by the nfsv4 server.  This count of individual nfsv4 operations is also
entered into /proc filesystem.

Signed-off-by: Shankar Anand<shanand@novell.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 30 insertions, 0 deletions

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index b0e095ea0c03..ee4eff27aedc 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -721,6 +721,12 @@ nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
         return nfs_ok;
 }
 
+static inline void nfsd4_increment_op_stats(u32 opnum)
+{
+        if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
+                nfsdstats.nfs4_opcount[opnum]++;
+}
+
 
 /*
  * COMPOUND call.
@@ -930,6 +936,8 @@ encode_op:
                 /* XXX Ugh, we need to get rid of this kind of special case: */
                 if (op->opnum == OP_READ && op->u.read.rd_filp)
                         fput(op->u.read.rd_filp);
+
+                nfsd4_increment_op_stats(op->opnum);
         }
 
 out:
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index 57265d563804..71944cddf680 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -72,6 +72,16 @@ static int nfsd_proc_show(struct seq_file *seq, void *v)
         /* show my rpc info */
         svc_seq_show(seq, &nfsd_svcstats);
 
+#ifdef CONFIG_NFSD_V4
+        /* Show count for individual nfsv4 operations */
+        /* Writing operation numbers 0 1 2 also for maintaining uniformity */
+        seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
+        for (i = 0; i <= LAST_NFS4_OP; i++)
+                seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
+
+        seq_putc(seq, '\n');
+#endif
+
         return 0;
 }
 
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 5f681d534295..db05182ca0e8 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -157,6 +157,12 @@ enum nfs_opnum4 {
         OP_ILLEGAL = 10044,
 };
 
+/*Defining first and last NFS4 operations implemented.
+Needs to be updated if more operations are defined in future.*/
+
+#define FIRST_NFS4_OP   OP_ACCESS
+#define LAST_NFS4_OP    OP_RELEASE_LOCKOWNER
+
 enum nfsstat4 {
         NFS4_OK = 0,
         NFS4ERR_PERM = 1,
diff --git a/include/linux/nfsd/stats.h b/include/linux/nfsd/stats.h
index b6f1e0cda4f2..28a82fdd922f 100644
--- a/include/linux/nfsd/stats.h
+++ b/include/linux/nfsd/stats.h
@@ -9,6 +9,8 @@
 #ifndef LINUX_NFSD_STATS_H
 #define LINUX_NFSD_STATS_H
 
+#include <linux/nfs4.h>
+
 struct nfsd_stats {
         unsigned int    rchits;         /* repcache hits */
         unsigned int    rcmisses;       /* repcache hits */
@@ -27,6 +29,10 @@ struct nfsd_stats {
         unsigned int    ra_size;        /* size of ra cache */
         unsigned int    ra_depth[11];   /* number of times ra entry was found that deep
                                          * in the cache (10percentiles). [10] = not found */
+#ifdef CONFIG_NFSD_V4
+        unsigned int    nfs4_opcount[LAST_NFS4_OP + 1]; /* count of individual nfsv4 operations */
+#endif
+
 };
 
 /* thread usage wraps very million seconds (approx one fortnight) */