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 linus.luessing@c0d3.blue --- net/bridge/br_input.c | 2 +- net/bridge/br_multicast.c | 5 +++-- net/bridge/br_private.h | 36 ++++++++++++++++++++++++++++++++---- 3 files changed, 36 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 26e91d2..ac5ca5b 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -864,11 +864,39 @@ static inline bool br_group_is_l2(const struct br_ip *group) #define mlock_dereference(X, br) \ rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
-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) +{ + if (br->multicast_router == MDB_RTR_TYPE_PERM) + return true; + + if (br->multicast_router == 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); + } + } + + return false; }
static inline bool