nfsd: add new reply_cache_stats file in nfsdfs

For presenting statistics relating to duplicate reply cache.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index f33455b4d957..a830f33df3ef 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -35,6 +35,7 @@ enum {
         NFSD_Threads,
         NFSD_Pool_Threads,
         NFSD_Pool_Stats,
+        NFSD_Reply_Cache_Stats,
         NFSD_Versions,
         NFSD_Ports,
         NFSD_MaxBlkSize,
@@ -212,6 +213,13 @@ static const struct file_operations pool_stats_operations = {
         .owner          = THIS_MODULE,
 };
 
+static struct file_operations reply_cache_stats_operations = {
+        .open           = nfsd_reply_cache_stats_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 /*----------------------------------------------------------------------------*/
 /*
  * payload - write methods
@@ -1047,6 +1055,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
                 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
+                [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO},
                 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
                 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},