From: Gao feng <gaofeng@cn.fujitsu.com>
Date: Tue, 10 Dec 2013 08:37:33 +0000 (+0800)
Subject: vxlan: leave multicast group when vxlan device down
X-Git-Tag: v3.14-rc1~94^2~514
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95ab09917a8187a02b518e22587c7f035edc7465;p=pandora-kernel.git

vxlan: leave multicast group when vxlan device down

vxlan_group_used only allows device to leave multicast group
when the remote_ip of this vxlan device is difference from
other vxlan devices' remote_ip. this will cause device not
leave multicast group untile the vn_sock of this vxlan deivce
being released.

The check in vxlan_group_used is not quite precise. since even
the remote_ip is same, but these vxlan devices may use different
lower devices, and they may use different vn_socks.

Only when some vxlan devices use the same vn_sock,same lower
device and same remote_ip, the mc_list of the vn_sock should
not be changed.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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