[PATCH v2 11/13] nfsd: make svc_stat per-network namespace instead of global

[Josef Bacik <josef@toxicpanda.com>]

The final bit of stats that is global is the rpc svc_stat.  Move this
into the nfsd_net struct and use that everywhere instead of the global
struct.  Remove the unused global struct.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/nfsd/netns.h  |  4 ++++
 fs/nfsd/nfsctl.c |  2 ++
 fs/nfsd/nfssvc.c |  2 +-
 fs/nfsd/stats.c  | 10 ++++------
 fs/nfsd/stats.h  |  2 --
 5 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 8d3f4cb7cab4..8fa23898669d 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -14,6 +14,7 @@
 #include <linux/nfs4.h>
 #include <linux/percpu_counter.h>
 #include <linux/siphash.h>
+#include <linux/sunrpc/stats.h>
 
 /* Hash tables for nfs4_clientid state */
 #define CLIENT_HASH_BITS                 4
@@ -182,6 +183,9 @@ struct nfsd_net {
 	/* number of available threads */
 	atomic_t                 th_cnt;
 
+	/* sunrpc svc stats */
+	struct svc_stat          nfsd_svcstats;
+
 	/* longest hash chain seen */
 	unsigned int             longest_chain;
 
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index ea3c8114245c..5a5547bd6ecf 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1674,6 +1674,8 @@ static __net_init int nfsd_net_init(struct net *net)
 	retval = nfsd_stat_counters_init(nn);
 	if (retval)
 		goto out_repcache_error;
+	memset(&nn->nfsd_svcstats, 0, sizeof(nn->nfsd_svcstats));
+	nn->nfsd_svcstats.program = &nfsd_program;
 	nn->nfsd_versions = NULL;
 	nn->nfsd4_minorversions = NULL;
 	nfsd4_init_leases_net(nn);
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 0961b95dcef6..ee39d4702811 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -660,7 +660,7 @@ int nfsd_create_serv(struct net *net)
 	if (nfsd_max_blksize == 0)
 		nfsd_max_blksize = nfsd_get_default_max_blksize();
 	nfsd_reset_versions(nn);
-	serv = svc_create_pooled(&nfsd_program, &nfsd_svcstats,
+	serv = svc_create_pooled(&nfsd_program, &nn->nfsd_svcstats,
 				 nfsd_max_blksize, nfsd);
 	if (serv == NULL)
 		return -ENOMEM;
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index 360e6dbf4e5c..06f52dcda528 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -27,10 +27,6 @@
 
 #include "nfsd.h"
 
-struct svc_stat		nfsd_svcstats = {
-	.program	= &nfsd_program,
-};
-
 static int nfsd_show(struct seq_file *seq, void *v)
 {
 	struct net *net = pde_data(file_inode(seq->file));
@@ -56,7 +52,7 @@ static int nfsd_show(struct seq_file *seq, void *v)
 	seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
 
 	/* show my rpc info */
-	svc_seq_show(seq, &nfsd_svcstats);
+	svc_seq_show(seq, &nn->nfsd_svcstats);
 
 #ifdef CONFIG_NFSD_V4
 	/* Show count for individual nfsv4 operations */
@@ -122,7 +118,9 @@ void nfsd_stat_counters_destroy(struct nfsd_net *nn)
 
 void nfsd_proc_stat_init(struct net *net)
 {
-	svc_proc_register(net, &nfsd_svcstats, &nfsd_proc_ops);
+	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+	svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops);
 }
 
 void nfsd_proc_stat_shutdown(struct net *net)
diff --git a/fs/nfsd/stats.h b/fs/nfsd/stats.h
index 5675d283a537..d2753e975dfd 100644
--- a/fs/nfsd/stats.h
+++ b/fs/nfsd/stats.h
@@ -10,8 +10,6 @@
 #include <uapi/linux/nfsd/stats.h>
 #include <linux/percpu_counter.h>
 
-extern struct svc_stat		nfsd_svcstats;
-
 int nfsd_percpu_counters_init(struct percpu_counter *counters, int num);
 void nfsd_percpu_counters_reset(struct percpu_counter *counters, int num);
 void nfsd_percpu_counters_destroy(struct percpu_counter *counters, int num);
-- 
2.43.0