[net-next v2 02/11] net: bridge: mcast: add wrappers for router node retrieval
From: Linus Lüssing <hidden>
Date: 2021-05-09 19:45:40
Also in:
batman, bridge, lkml
Subsystem:
ethernet bridge, networking [general], the rest · Maintainers:
Nikolay Aleksandrov, Ido Schimmel, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
In preparation for the upcoming split of multicast router state into their IPv4 and IPv6 variants and to avoid IPv6 #ifdef clutter later add two wrapper functions for router node retrieval in the payload forwarding code. Signed-off-by: Linus Lüssing <redacted> --- net/bridge/br_forward.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 3b67184..b5ec4f9 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c@@ -264,6 +264,16 @@ static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb, __br_forward(p, skb, local_orig); } +static inline struct hlist_node * +br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) { + return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list)); +} + +static inline struct net_bridge_port * +br_multicast_rport_from_node(struct hlist_node *rp, struct sk_buff *skb) { + return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist); +} + /* called with rcu_read_lock */ void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
@@ -276,7 +286,8 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst, bool allow_mode_include = true; struct hlist_node *rp; - rp = rcu_dereference(hlist_first_rcu(&br->router_list)); + rp = br_multicast_get_first_rport_node(br, skb); + if (mdst) { p = rcu_dereference(mdst->ports); if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
@@ -290,7 +301,7 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct net_bridge_port *port, *lport, *rport; lport = p ? p->key.port : NULL; - rport = hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist); + rport = br_multicast_rport_from_node(rp, skb); if ((unsigned long)lport > (unsigned long)rport) { port = lport;
--
2.31.0