SUNRPC: create GSS auth cache per network namespace

This patch makes GSS auth cache details allocated and registered per network
namespace context.
Thus with this patch rsi_cache and rsc_cache contents for network namespace "X"
are controlled from proc file system mount for the same network namespace "X".

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/net/sunrpc/netns.h b/net/sunrpc/netns.h
index 309f88d..ce7bd44 100644
--- a/net/sunrpc/netns.h
+++ b/net/sunrpc/netns.h
@@ -10,6 +10,8 @@
 	struct proc_dir_entry *proc_net_rpc;
 	struct cache_detail *ip_map_cache;
 	struct cache_detail *unix_gid_cache;
+	struct cache_detail *rsc_cache;
+	struct cache_detail *rsi_cache;
 
 	struct super_block *pipefs_sb;
 	struct mutex pipefs_sb_lock;