From f4618d39a34dab316090263b42cd8799f31ce277 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 26 Sep 2007 22:40:08 -0700 Subject: [NETNS]: Simplify the network namespace list locking rules. Denis V. Lunev noticed that the locking rules for the network namespace list are over complicated and broken. In particular the current register_netdev_notifier currently does not take any lock making the for_each_net iteration racy with network namespace creation and destruction. Oops. The fact that we need to use for_each_net in rtnl_unlock() when the rtnetlink support becomes per network namespace makes designing the proper locking tricky. In addition we need to be able to call rtnl_lock() and rtnl_unlock() when we have the net_mutex held. After thinking about it and looking at the alternatives carefully it looks like the simplest and most maintainable solution is to remove net_list_mutex altogether, and to use the rtnl_mutex instead. Signed-off-by: Eric W. Biederman Signed-off-by: David S. Miller --- include/net/net_namespace.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include') diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 13b0e3b547f0..934c840b5941 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -96,9 +96,6 @@ static inline void release_net(struct net *net) #endif } -extern void net_lock(void); -extern void net_unlock(void); - #define for_each_net(VAR) \ list_for_each_entry(VAR, &net_namespace_list, list) -- cgit v1.2.1