bridge: reserve space for IFLA_BRPORT_FAST_LEAVE

[ Upstream commit 3da889b616164bde76a37350cf28e0d17a94e979 ]

The bridge multicast fast leave feature was added sufficient space
was not reserved in the netlink message. This means the flag may be
lost in netlink events and results of queries.

Found by observation while looking up some netlink stuff for discussion with Vlad.
Problem introduced by commit c2d3babfafbb9f6629cfb47139758e59a5eb0d80
Author: David S. Miller <davem@davemloft.net>
Date:   Wed Dec 5 16:24:45 2012 -0500

    bridge: implement multicast fast leave

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 5dc66abcc9e22c93bb4f70f5a219f730bab63275..580e1762f62d312db080a5645e159245d1a1ca09 100644 (file)
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -28,6 +28,7 @@ static inline size_t br_port_info_size(void)
                + nla_total_size(1)     /* IFLA_BRPORT_MODE */
                + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
                + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
+               + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
                + 0;
 }