Unknown multicast, MAC/IPv4/IPv6, should always be flooded according to
the per-port mcast_flood setting, as well as to detected and configured
mcast_router ports.
This patch drops the mrouters_only classifier of unknown IP multicast
and moves the flow handling from br_multicast_flood() to br_flood().
This in turn means br_flood() must know about multicast router ports.
Signed-off-by: Joachim Wiberg <troglobit@xxxxxxxxx>
---
net/bridge/br_forward.c | 11 +++++++++++
net/bridge/br_multicast.c | 6 +-----
2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 02bb620d3b8d..ab5b97a8c12e 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -199,9 +199,15 @@ static struct net_bridge_port *maybe_deliver(
void br_flood(struct net_bridge *br, struct sk_buff *skb,
enum br_pkt_type pkt_type, bool local_rcv, bool local_orig)
{
+ struct net_bridge_mcast *brmctx = &br->multicast_ctx;
+ struct net_bridge_port *rport = NULL;
struct net_bridge_port *prev = NULL;
+ struct hlist_node *rp = NULL;
struct net_bridge_port *p;
+ if (pkt_type == BR_PKT_MULTICAST)
+ rp = br_multicast_get_first_rport_node(brmctx, skb);
+
list_for_each_entry_rcu(p, &br->port_list, list) {
/* Do not flood unicast traffic to ports that turn it off, nor
* other traffic if flood off, except for traffic we originate
@@ -212,6 +218,11 @@ void br_flood(struct net_bridge *br, struct sk_buff *skb,
continue;
break;
case BR_PKT_MULTICAST:
+ rport = br_multicast_rport_from_node_skb(rp, skb);
+ if (rport == p) {
+ rp = rcu_dereference(hlist_next_rcu(rp));
+ break;
+ }
if (!(p->flags & BR_MCAST_FLOOD) && skb->dev != br->dev)
continue;
break;
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index db4f2641d1cd..c57e3bbb00ad 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -3643,9 +3643,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
err = ip_mc_check_igmp(skb);
if (err == -ENOMSG) {
- if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
- BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
- } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
+ if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
if (ip_hdr(skb)->protocol == IPPROTO_PIM)
br_multicast_pim(brmctx, pmctx, skb);
} else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
@@ -3712,8 +3710,6 @@ static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
err = ipv6_mc_check_mld(skb);
if (err == -ENOMSG || err == -ENODATA) {
- if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
- BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
if (err == -ENODATA &&
ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
--
2.25.1
