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net: bridge: mdb: add support for add/del/dump of entries with source

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Add new mdb attributes (MDBE_ATTR_SOURCE for setting,
MDBA_MDB_EATTR_SOURCE for dumping) to allow add/del and dump of mdb
entries with a source address (S,G). New S,G entries are created with
filter mode of MCAST_INCLUDE. The same attributes are used for IPv4 and
IPv6, they're validated and parsed based on their protocol.
S,G host joined entries which are added by user are not allowed yet.

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 10:30:19 +03:00
committed by David S. Miller
parent 9c4258c78a
commit 88d4bd1804
3 changed files with 130 additions and 28 deletions
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14
net/bridge/br_private.h
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@@ -873,6 +873,20 @@ static inline bool br_multicast_querier_exists(struct net_bridge *br,
}
}
static inline bool br_multicast_is_star_g(const struct br_ip *ip)
{
switch (ip->proto) {
case htons(ETH_P_IP):
return ipv4_is_zeronet(ip->src.ip4);
#if IS_ENABLED(CONFIG_IPV6)
case htons(ETH_P_IPV6):
return ipv6_addr_any(&ip->src.ip6);
#endif
default:
return false;
}
}
static inline int br_multicast_igmp_type(const struct sk_buff *skb)
{
return BR_INPUT_SKB_CB(skb)->igmp;