[net-next v3 05/11] net: bridge: mcast: prepare is-router function for mcast router split
From: Linus Lüssing <hidden>
Date: 2021-05-12 23:43:17
Also in:
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 make br_multicast_is_router() protocol family aware. Note that for now br_ip6_multicast_is_router() uses the currently still common ip4_mc_router_timer for now. It will be renamed to ip6_mc_router_timer later when the split is performed. While at it also renames the "1" and "2" constants in br_multicast_is_router() to the MDB_RTR_TYPE_TEMP_QUERY and MDB_RTR_TYPE_PERM enums. Signed-off-by: Linus Lüssing <redacted> --- net/bridge/br_input.c | 2 +- net/bridge/br_multicast.c | 5 +++-- net/bridge/br_private.h | 37 +++++++++++++++++++++++++++++++++---- 3 files changed, 37 insertions(+), 7 deletions(-)
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 8875e95..1f50630 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c@@ -132,7 +132,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && br_multicast_querier_exists(br, eth_hdr(skb), mdst)) { if ((mdst && mdst->host_joined) || - br_multicast_is_router(br)) { + br_multicast_is_router(br, skb)) { local_rcv = true; br->dev->stats.multicast++; }
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 7edbbc9..048b5b9 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c@@ -1391,7 +1391,8 @@ static void br_multicast_local_router_expired(struct timer_list *t) spin_lock(&br->multicast_lock); if (br->multicast_router == MDB_RTR_TYPE_DISABLED || br->multicast_router == MDB_RTR_TYPE_PERM || - timer_pending(&br->ip4_mc_router_timer)) + br_ip4_multicast_is_router(br) || + br_ip6_multicast_is_router(br)) goto out; br_mc_router_state_change(br, false);
@@ -3622,7 +3623,7 @@ bool br_multicast_router(const struct net_device *dev) bool is_router; spin_lock_bh(&br->multicast_lock); - is_router = br_multicast_is_router(br); + is_router = br_multicast_is_router(br, NULL); spin_unlock_bh(&br->multicast_lock); return is_router; }
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 5b9a6b2..41ed3fe 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h@@ -874,11 +874,40 @@ br_multicast_rport_from_node(struct hlist_node *rp, struct sk_buff *skb) { return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist); } -static inline bool br_multicast_is_router(struct net_bridge *br) +static inline bool br_ip4_multicast_is_router(struct net_bridge *br) { - return br->multicast_router == 2 || - (br->multicast_router == 1 && - timer_pending(&br->ip4_mc_router_timer)); + return timer_pending(&br->ip4_mc_router_timer); +} + +static inline bool br_ip6_multicast_is_router(struct net_bridge *br) +{ +#if IS_ENABLED(CONFIG_IPV6) + return timer_pending(&br->ip4_mc_router_timer); +#else + return false; +#endif +} + +static inline bool +br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb) +{ + switch (br->multicast_router) { + case MDB_RTR_TYPE_PERM: + return true; + case MDB_RTR_TYPE_TEMP_QUERY: + if (skb) { + if (skb->protocol == htons(ETH_P_IP)) + return br_ip4_multicast_is_router(br); + else if (skb->protocol == htons(ETH_P_IPV6)) + return br_ip6_multicast_is_router(br); + } else { + return br_ip4_multicast_is_router(br) || + br_ip6_multicast_is_router(br); + } + fallthrough; + default: + return false; + } } static inline bool
--
2.31.0