SUNRPC: register service stats /proc entries in passed network namespace context

This patch makes it possible to create NFSd program entry ("/proc/net/rpc/nfsd")
in passed network namespace context instead of hard-coded "init_net".
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfsd/stats.c

@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/sunrpc/stats.h>
 #include <linux/nfsd/stats.h>
+#include <net/net_namespace.h>
 
 #include "nfsd.h"
 
@@ -94,11 +95,11 @@ static const struct file_operations nfsd_proc_fops = {
 void
 nfsd_stat_init(void)
 {
-	svc_proc_register(&nfsd_svcstats, &nfsd_proc_fops);
+	svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_fops);
 }
 
 void
 nfsd_stat_shutdown(void)
 {
-	svc_proc_unregister("nfsd");
+	svc_proc_unregister(&init_net, "nfsd");
 }

include/linux/sunrpc/stats.h

@@ -61,9 +61,9 @@ void			rpc_modcount(struct inode *, int);
 struct proc_dir_entry *	rpc_proc_register(struct net *,struct rpc_stat *);
 void			rpc_proc_unregister(struct net *,const char *);
 void			rpc_proc_zero(struct rpc_program *);
-struct proc_dir_entry *	svc_proc_register(struct svc_stat *,
+struct proc_dir_entry *	svc_proc_register(struct net *, struct svc_stat *,
 					  const struct file_operations *);
-void			svc_proc_unregister(const char *);
+void			svc_proc_unregister(struct net *, const char *);
 
 void			svc_seq_show(struct seq_file *,
 				     const struct svc_stat *);
@@ -73,9 +73,9 @@ static inline struct proc_dir_entry *rpc_proc_register(struct net *net, struct r
 static inline void rpc_proc_unregister(struct net *net, const char *p) {}
 static inline void rpc_proc_zero(struct rpc_program *p) {}
 
-static inline struct proc_dir_entry *svc_proc_register(struct svc_stat *s,
+static inline struct proc_dir_entry *svc_proc_register(struct net *net, struct svc_stat *s,
 						       const struct file_operations *f) { return NULL; }
-static inline void svc_proc_unregister(const char *p) {}
+static inline void svc_proc_unregister(struct net *net, const char *p) {}
 
 static inline void svc_seq_show(struct seq_file *seq,
 				const struct svc_stat *st) {}

net/sunrpc/stats.c

@@ -241,18 +241,18 @@ rpc_proc_unregister(struct net *net, const char *name)
 EXPORT_SYMBOL_GPL(rpc_proc_unregister);
 
 struct proc_dir_entry *
-svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
+svc_proc_register(struct net *net, struct svc_stat *statp, const struct file_operations *fops)
 {
-	return do_register(&init_net, statp->program->pg_name, statp, fops);
+	return do_register(net, statp->program->pg_name, statp, fops);
 }
 EXPORT_SYMBOL_GPL(svc_proc_register);
 
 void
-svc_proc_unregister(const char *name)
+svc_proc_unregister(struct net *net, const char *name)
 {
 	struct sunrpc_net *sn;
 
-	sn = net_generic(&init_net, sunrpc_net_id);
+	sn = net_generic(net, sunrpc_net_id);
 	remove_proc_entry(name, sn->proc_net_rpc);
 }
 EXPORT_SYMBOL_GPL(svc_proc_unregister);