linux-kernel - [net-next v3 04/11] net: bridge: mcast: prepare query reception for mcast router split

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Date:   Thu, 13 May 2021 01:19:34 +0200
From:   Linus Lüssing <linus.luessing@...3.blue>
To:     netdev@...r.kernel.org
Cc:     Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        bridge@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Linus Lüssing <linus.luessing@...3.blue>
Subject: [net-next v3 04/11] net: bridge: mcast: prepare query reception for mcast router split

In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants and as the br_multicast_mark_router() will
be split for that remove the select querier wrapper and instead add
ip4 and ip6 variants for br_multicast_query_received().

Signed-off-by: Linus Lüssing <linus.luessing@...3.blue>
---
 net/bridge/br_multicast.c | 53 ++++++++++++++++++++-------------------
 1 file changed, 27 insertions(+), 26 deletions(-)

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 6fe93a3..7edbbc9 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -2615,22 +2615,6 @@ update:
 }
 #endif
 
-static bool br_multicast_select_querier(struct net_bridge *br,
-					struct net_bridge_port *port,
-					struct br_ip *saddr)
-{
-	switch (saddr->proto) {
-	case htons(ETH_P_IP):
-		return br_ip4_multicast_select_querier(br, port, saddr->src.ip4);
-#if IS_ENABLED(CONFIG_IPV6)
-	case htons(ETH_P_IPV6):
-		return br_ip6_multicast_select_querier(br, port, &saddr->src.ip6);
-#endif
-	}
-
-	return false;
-}
-
 static void
 br_multicast_update_query_timer(struct net_bridge *br,
 				struct bridge_mcast_other_query *query,
@@ -2708,19 +2692,36 @@ static void br_multicast_mark_router(struct net_bridge *br,
 		  now + br->multicast_querier_interval);
 }
 
-static void br_multicast_query_received(struct net_bridge *br,
-					struct net_bridge_port *port,
-					struct bridge_mcast_other_query *query,
-					struct br_ip *saddr,
-					unsigned long max_delay)
+static void
+br_ip4_multicast_query_received(struct net_bridge *br,
+				struct net_bridge_port *port,
+				struct bridge_mcast_other_query *query,
+				struct br_ip *saddr,
+				unsigned long max_delay)
 {
-	if (!br_multicast_select_querier(br, port, saddr))
+	if (!br_ip4_multicast_select_querier(br, port, saddr->src.ip4))
 		return;
 
 	br_multicast_update_query_timer(br, query, max_delay);
 	br_multicast_mark_router(br, port);
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
+static void
+br_ip6_multicast_query_received(struct net_bridge *br,
+				struct net_bridge_port *port,
+				struct bridge_mcast_other_query *query,
+				struct br_ip *saddr,
+				unsigned long max_delay)
+{
+	if (!br_ip6_multicast_select_querier(br, port, &saddr->src.ip6))
+		return;
+
+	br_multicast_update_query_timer(br, query, max_delay);
+	br_multicast_mark_router(br, port);
+}
+#endif
+
 static void br_ip4_multicast_query(struct net_bridge *br,
 				   struct net_bridge_port *port,
 				   struct sk_buff *skb,
@@ -2768,8 +2769,8 @@ static void br_ip4_multicast_query(struct net_bridge *br,
 		saddr.proto = htons(ETH_P_IP);
 		saddr.src.ip4 = iph->saddr;
 
-		br_multicast_query_received(br, port, &br->ip4_other_query,
-					    &saddr, max_delay);
+		br_ip4_multicast_query_received(br, port, &br->ip4_other_query,
+						&saddr, max_delay);
 		goto out;
 	}
 
@@ -2856,8 +2857,8 @@ static int br_ip6_multicast_query(struct net_bridge *br,
 		saddr.proto = htons(ETH_P_IPV6);
 		saddr.src.ip6 = ipv6_hdr(skb)->saddr;
 
-		br_multicast_query_received(br, port, &br->ip6_other_query,
-					    &saddr, max_delay);
+		br_ip6_multicast_query_received(br, port, &br->ip6_other_query,
+						&saddr, max_delay);
 		goto out;
 	} else if (!group) {
 		goto out;
-- 
2.31.0