[net-next v2 04/11] net: bridge: mcast: prepare query reception for mcast router split

Linus Lüssing
2021-05-09T19:45:46Z

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@c0d3.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