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bridge: notify applications if address of bridge device changes

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The mac address of the bridge device may be changed when a new interface
is added to the bridge. If this happens, then the bridge needs to call
the network notifiers to tickle any other systems that care. Since bridge
can be a module, this also means exporting the notifier function.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger
2011-03-24 13:24:01 +00:00
committed by David S. Miller
parent 8628bd8af7
commit edf947f100
4 changed files with 13 additions and 5 deletions
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9
net/bridge/br_stp_if.c
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@@ -204,7 +204,7 @@ void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *addr)
static const unsigned short br_mac_zero_aligned[ETH_ALEN >> 1];
/* called under bridge lock */
void br_stp_recalculate_bridge_id(struct net_bridge *br)
bool br_stp_recalculate_bridge_id(struct net_bridge *br)
{
const unsigned char *br_mac_zero =
(const unsigned char *)br_mac_zero_aligned;
@@ -222,8 +222,11 @@ void br_stp_recalculate_bridge_id(struct net_bridge *br)
}
if (compare_ether_addr(br->bridge_id.addr, addr))
br_stp_change_bridge_id(br, addr);
if (compare_ether_addr(br->bridge_id.addr, addr) == 0)
return false; /* no change */
br_stp_change_bridge_id(br, addr);
return true;
}
/* called under bridge lock */