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net: bridge: mcast: export multicast router presence adjacent to a port

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To properly support routable multicast addresses in batman-adv in a
group-aware way, a batman-adv node needs to know if it serves multicast
routers.

This adds a function to the bridge to export this so that batman-adv
can then make full use of the Multicast Router Discovery capability of
the bridge.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Linus Lüssing
2021-05-13 15:20:53 +02:00
committed by David S. Miller
parent b7fb091654
commit 3b85f9ba34
2 changed files with 63 additions and 0 deletions
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8
include/linux/if_bridge.h
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@@ -67,6 +67,7 @@ int br_multicast_list_adjacent(struct net_device *dev,
struct list_head *br_ip_list);
bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
bool br_multicast_has_router_adjacent(struct net_device *dev, int proto);
bool br_multicast_enabled(const struct net_device *dev);
bool br_multicast_router(const struct net_device *dev);
int br_mdb_replay(struct net_device *br_dev, struct net_device *dev,
@@ -87,6 +88,13 @@ static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
{
return false;
}
static inline bool br_multicast_has_router_adjacent(struct net_device *dev,
int proto)
{
return true;
}
static inline bool br_multicast_enabled(const struct net_device *dev)
{
return false;