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net: bridge: allow IPv6 when multicast flood is disabled

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[ Upstream commit 8953de2f02 ]

Even with multicast flooding turned off, IPv6 ND should still work so
that IPv6 connectivity is provided. Allow this by continuing to flood
multicast traffic originated by us.

Fixes: b6cb5ac833 ("net: bridge: add per-port multicast flood flag")
Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Mike Manning <mmanning@brocade.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Manning
2017-03-01 09:55:28 +00:00
committed by Greg Kroah-Hartman
parent bbaeb9b73f
commit fa7c48fb3a
1 changed files with 2 additions and 1 deletions
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3
net/bridge/br_forward.c
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@@ -186,8 +186,9 @@ void br_flood(struct net_bridge *br, struct sk_buff *skb,
/* Do not flood unicast traffic to ports that turn it off */ /* Do not flood unicast traffic to ports that turn it off */
if (pkt_type == BR_PKT_UNICAST && !(p->flags & BR_FLOOD)) if (pkt_type == BR_PKT_UNICAST && !(p->flags & BR_FLOOD))
continue; continue;
/* Do not flood if mc off, except for traffic we originate */
if (pkt_type == BR_PKT_MULTICAST && if (pkt_type == BR_PKT_MULTICAST &&
!(p->flags & BR_MCAST_FLOOD)) !(p->flags & BR_MCAST_FLOOD) && skb->dev != br->dev)
continue; continue;
/* Do not flood to ports that enable proxy ARP */ /* Do not flood to ports that enable proxy ARP */