commit ff24870f46d51d79fc74a241fd7c12ccb933c69f
author Al Viro <viro@zeniv.linux.org.uk> Sat Nov 01 00:10:50 2014 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Thu Dec 04 14:34:04 2014 -0500
tree b299fc2763544955adb7d286a4bfc3a4f9a3f526
parent 58be28256d98a6b996b20f49130ea11afb8de75a

netns: switch ->get()/->put()/->install()/->inum() to working with &net->ns

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

net/core/net_namespace.c

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index f2f756c..97f4dc2 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -347,7 +347,7 @@
 
 	ei = get_proc_ns(file_inode(file));
 	if (ei->ns_ops == &netns_operations)
-		net = get_net(ei->ns);
+		net = get_net(container_of(ei->ns, struct net, ns));
 	else
 		net = ERR_PTR(-EINVAL);
 
@@ -640,17 +640,22 @@
 		net = get_net(nsproxy->net_ns);
 	task_unlock(task);
 
-	return net;
+	return net ? &net->ns : NULL;
+}
+
+static inline struct net *to_net_ns(struct ns_common *ns)
+{
+	return container_of(ns, struct net, ns);
 }
 
 static void netns_put(void *ns)
 {
-	put_net(ns);
+	put_net(to_net_ns(ns));
 }
 
 static int netns_install(struct nsproxy *nsproxy, void *ns)
 {
-	struct net *net = ns;
+	struct net *net = to_net_ns(ns);
 
 	if (!ns_capable(net->user_ns, CAP_SYS_ADMIN) ||
 	    !ns_capable(current_user_ns(), CAP_SYS_ADMIN))
@@ -663,8 +668,7 @@
 
 static unsigned int netns_inum(void *ns)
 {
-	struct net *net = ns;
-	return net->ns.inum;
+	return ((struct ns_common *)ns)->inum;
 }
 
 const struct proc_ns_operations netns_operations = {