iplink: bridge: add support for IFLA_BR_MCAST_ROUTER

This patch implements support for the IFLA_BR_MCAST_ROUTER attribute
in iproute2 so it can change the multicast router value.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

diff --git a/ip/iplink_bridge.c b/ip/iplink_bridge.c
index 9a8924c2ee8213b7cb8415b1ce6e8725cc2fafe1..7a945ed2ae6329ccc185f982312c041ae6fe5338 100644 (file)
--- a/ip/iplink_bridge.c
+++ b/ip/iplink_bridge.c
@@ -33,6 +33,7 @@ static void print_explain(FILE *f)
                "                  [ vlan_filtering VLAN_FILTERING ]\n"
                "                  [ vlan_protocol VLAN_PROTOCOL ]\n"
                "                  [ vlan_default_pvid VLAN_DEFAULT_PVID ]\n"
+               "                  [ mcast_router MULTICAST_ROUTER ]\n"
                "\n"
                "Where: VLAN_PROTOCOL := { 802.1Q | 802.1ad }\n"
        );
@@ -140,6 +141,14 @@ static int bridge_parse_opt(struct link_util *lu, int argc, char **argv,
 
                        addattr16(n, 1024, IFLA_BR_VLAN_DEFAULT_PVID,
                                  default_pvid);
+               } else if (matches(*argv, "mcast_router") == 0) {
+                       __u8 mcast_router;
+
+                       NEXT_ARG();
+                       if (get_u8(&mcast_router, *argv, 0))
+                               invarg("invalid mcast_router", *argv);
+
+                       addattr8(n, 1024, IFLA_BR_MCAST_ROUTER, mcast_router);
                } else if (matches(*argv, "help") == 0) {
                        explain();
                        return -1;
@@ -277,6 +286,10 @@ static void bridge_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
                                    RTA_PAYLOAD(tb[IFLA_BR_GROUP_ADDR]),
                                    1 /*ARPHDR_ETHER*/, mac, sizeof(mac)));
        }
+
+       if (tb[IFLA_BR_MCAST_ROUTER])
+               fprintf(f, "mcast_router %u ",
+                       rta_getattr_u8(tb[IFLA_BR_MCAST_ROUTER]));
 }
 
 static void bridge_print_help(struct link_util *lu, int argc, char **argv,