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net: bridge: mcast: when forwarding handle filter mode and blocked flag

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We need to avoid forwarding to ports in MCAST_INCLUDE filter mode when the
mdst entry is a *,G or when the port has the blocked flag.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2020-09-22 10:30:27 +03:00 committed by David S. Miller
parent 094b82fd53
commit 36cfec7359
1 changed files with 14 additions and 1 deletions
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15
net/bridge/br_forward.c
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@ -274,10 +274,19 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *prev = NULL;
struct net_bridge_port_group *p;
bool allow_mode_include = true;
struct hlist_node *rp;
rp = rcu_dereference(hlist_first_rcu(&br->router_list));
p = mdst ? rcu_dereference(mdst->ports) : NULL;
if (mdst) {
p = rcu_dereference(mdst->ports);
if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
br_multicast_is_star_g(&mdst->addr))
allow_mode_include = false;
} else {
p = NULL;
}
while (p || rp) {
struct net_bridge_port *port, *lport, *rport;
@ -292,6 +301,10 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
local_orig);
goto delivered;
}
if ((!allow_mode_include &&
p->filter_mode == MCAST_INCLUDE) ||
(p->flags & MDB_PG_FLAGS_BLOCKED))
goto delivered;
} else {
port = rport;
}