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Subject[PATCH 3.19.y-ckt 203/251] bridge: multicast: restore router configuration on port link down/up
Date
3.19.8-ckt4 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Satish Ashok <sashok@cumulusnetworks.com>

commit 754bc547f0a79f7568b5b81c7fc0a8d044a6571a upstream.

When a port goes through a link down/up the multicast router configuration
is not restored.

Signed-off-by: Satish Ashok <sashok@cumulusnetworks.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Fixes: 0909e11758bd ("bridge: Add multicast_router sysfs entries")
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
net/bridge/br_multicast.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index c08f510..dd6c7ca 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -37,6 +37,8 @@

static void br_multicast_start_querier(struct net_bridge *br,
struct bridge_mcast_own_query *query);
+static void br_multicast_add_router(struct net_bridge *br,
+ struct net_bridge_port *port);
unsigned int br_mdb_rehash_seq;

static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
@@ -935,6 +937,8 @@ void br_multicast_enable_port(struct net_bridge_port *port)
#if IS_ENABLED(CONFIG_IPV6)
br_multicast_enable(&port->ip6_own_query);
#endif
+ if (port->multicast_router == 2 && hlist_unhashed(&port->rlist))
+ br_multicast_add_router(br, port);

out:
spin_unlock(&br->multicast_lock);
--
1.9.1


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