net: bridge: vlan: add support for mcast querier interval global option

Add support to change and retrieve global vlan multicast querier interval
option.

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

include/uapi/linux/if_bridge.h

@@ -556,6 +556,7 @@ enum {
 	BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL,
 	BRIDGE_VLANDB_GOPTS_PAD,
 	BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL,
+	BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL,
 	__BRIDGE_VLANDB_GOPTS_MAX
 };
 #define BRIDGE_VLANDB_GOPTS_MAX (__BRIDGE_VLANDB_GOPTS_MAX - 1)

net/bridge/br_private.h

@@ -1182,6 +1182,8 @@ br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
 	       brmctx2->multicast_last_member_interval &&
 	       brmctx1->multicast_membership_interval ==
 	       brmctx2->multicast_membership_interval &&
+	       brmctx1->multicast_querier_interval ==
+	       brmctx2->multicast_querier_interval &&
 #if IS_ENABLED(CONFIG_IPV6)
 	       brmctx1->multicast_mld_version ==
 	       brmctx2->multicast_mld_version &&

net/bridge/br_vlan_options.c

@@ -305,6 +305,10 @@ bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
 	if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL,
 			      clockval, BRIDGE_VLANDB_GOPTS_PAD))
 		goto out_err;
+	clockval = jiffies_to_clock_t(v_opts->br_mcast_ctx.multicast_querier_interval);
+	if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL,
+			      clockval, BRIDGE_VLANDB_GOPTS_PAD))
+		goto out_err;
 
 #if IS_ENABLED(CONFIG_IPV6)
 	if (nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION,
@@ -335,6 +339,7 @@ static size_t rtnl_vlan_global_opts_nlmsg_size(void)
 		+ nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT */
 		+ nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL */
 		+ nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL */
+		+ nla_total_size(sizeof(u64)) /* BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL */
 #endif
 		+ nla_total_size(sizeof(u16)); /* BRIDGE_VLANDB_GOPTS_RANGE */
 }
@@ -437,6 +442,13 @@ static int br_vlan_process_global_one_opts(const struct net_bridge *br,
 		v->br_mcast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
 		*changed = true;
 	}
+	if (tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL]) {
+		u64 val;
+
+		val = nla_get_u64(tb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL]);
+		v->br_mcast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
+		*changed = true;
+	}
 #if IS_ENABLED(CONFIG_IPV6)
 	if (tb[BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION]) {
 		u8 ver;
@@ -463,6 +475,7 @@ static const struct nla_policy br_vlan_db_gpol[BRIDGE_VLANDB_GOPTS_MAX + 1] = {
 	[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT]	= { .type = NLA_U32 },
 	[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL]	= { .type = NLA_U64 },
 	[BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL]	= { .type = NLA_U64 },
+	[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL]	= { .type = NLA_U64 },
 };
 
 int br_vlan_rtm_process_global_options(struct net_device *dev,