bridge: netlink: add support for multicast_router

Add IFLA_BR_MCAST_ROUTER to allow setting and retrieving
br->multicast_router when igmp snooping is enabled.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 5853c5737006..f4df609c1ad9 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -767,6 +767,7 @@ static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
                                  .len  = ETH_ALEN },
+        [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 };
 
 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
@@ -862,6 +863,16 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
         if (data[IFLA_BR_FDB_FLUSH])
                 br_fdb_flush(br);
 
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+        if (data[IFLA_BR_MCAST_ROUTER]) {
+                u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
+
+                err = br_multicast_set_router(br, multicast_router);
+                if (err)
+                        return err;
+        }
+#endif
+
         return 0;
 }
 
@@ -889,6 +900,9 @@ static size_t br_get_size(const struct net_device *brdev)
                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
                nla_total_size(sizeof(u64)) +    /* IFLA_BR_GC_TIMER */
                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+               nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
+#endif
                0;
 }
 
@@ -945,6 +959,11 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
                 return -EMSGSIZE;
 #endif
 
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+        if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router))
+                return -EMSGSIZE;
+#endif
+
         return 0;
 }