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Commit 614334df authored by Cong Wang's avatar Cong Wang Committed by David S. Miller
Browse files

vxlan: fix a regression of igmp join 



This is a regression introduced by:

	commit 3fc2de2f
	Author: stephen hemminger <stephen@networkplumber.org>
	Date:   Thu Jul 18 08:40:15 2013 -0700

	    vxlan: fix igmp races

Before this commit, the old code was:

       if (vxlan_group_used(vn, vxlan->default_dst.remote_ip))
               ip_mc_join_group(sk, &mreq);
       else
               ip_mc_leave_group(sk, &mreq);

therefore we shoud check vxlan_group_used(), not its opposite,
for igmp_join.

Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: default avatarCong Wang <amwang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 288a9376

drivers/net/vxlan.c

+1 −1
Original line number Diff line number Diff line
@@ -1386,7 +1386,7 @@ static int vxlan_open(struct net_device *dev) 
		return -ENOTCONN;



	if (IN_MULTICAST(ntohl(vxlan->default_dst.remote_ip)) &&

	    ! vxlan_group_used(vn, vxlan->default_dst.remote_ip)) {

	    vxlan_group_used(vn, vxlan->default_dst.remote_ip)) {

		vxlan_sock_hold(vs);

		dev_hold(dev);

		queue_work(vxlan_wq, &vxlan->igmp_join);