netdev - [PATCH iproute2 05/21] iplink: bridge: add support for IFLA_BR_GROUP

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Message-Id: <1454932527-30569-6-git-send-email-razor@blackwall.org>
Date:	Mon,  8 Feb 2016 12:55:11 +0100
From:	Nikolay Aleksandrov <razor@...ckwall.org>
To:	netdev@...r.kernel.org
Cc:	roopa@...ulusnetworks.com, stephen@...workplumber.org,
	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: [PATCH iproute2 05/21] iplink: bridge: add support for IFLA_BR_GROUP_ADDR

From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>

This patch implements support for the IFLA_BR_GROUP_ADDR attribute
in iproute2 so it can change the group address.

Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
---
 ip/iplink_bridge.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/ip/iplink_bridge.c b/ip/iplink_bridge.c
index fb448f9f863d..3d343f7649fe 100644
--- a/ip/iplink_bridge.c
+++ b/ip/iplink_bridge.c
@@ -28,6 +28,7 @@ static void print_explain(FILE *f)
 		"                  [ stp_state STP_STATE ]\n"
 		"                  [ priority PRIORITY ]\n"
 		"                  [ group_fwd_mask MASK ]\n"
+		"                  [ group_address ADDRESS ]\n"
 		"                  [ vlan_filtering VLAN_FILTERING ]\n"
 		"                  [ vlan_protocol VLAN_PROTOCOL ]\n"
 		"\n"
@@ -119,6 +120,15 @@ static int bridge_parse_opt(struct link_util *lu, int argc, char **argv,
 				invarg("invalid group_fwd_mask", *argv);
 
 			addattr16(n, 1024, IFLA_BR_GROUP_FWD_MASK, fwd_mask);
+		} else if (matches(*argv, "group_address") == 0) {
+			char llabuf[32];
+			int len;
+
+			NEXT_ARG();
+			len = ll_addr_a2n(llabuf, sizeof(llabuf), *argv);
+			if (len < 0)
+				return -1;
+			addattr_l(n, 1024, IFLA_BR_GROUP_ADDR, llabuf, len);
 		} else if (matches(*argv, "help") == 0) {
 			explain();
 			return -1;
@@ -225,6 +235,15 @@ static void bridge_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 	if (tb[IFLA_BR_GROUP_FWD_MASK])
 		fprintf(f, "group_fwd_mask %#x ",
 			rta_getattr_u16(tb[IFLA_BR_GROUP_FWD_MASK]));
+
+	if (tb[IFLA_BR_GROUP_ADDR]) {
+		SPRINT_BUF(mac);
+
+		fprintf(f, "group_address %s ",
+			ll_addr_n2a(RTA_DATA(tb[IFLA_BR_GROUP_ADDR]),
+				    RTA_PAYLOAD(tb[IFLA_BR_GROUP_ADDR]),
+				    1 /*ARPHDR_ETHER*/, mac, sizeof(mac)));
+	}
 }
 
 static void bridge_print_help(struct link_util *lu, int argc, char **argv,
-- 
2.4.3