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| author | Linus Lüssing <linus.luessing@web.de> | 2014-07-07 05:41:17 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-08 16:12:53 -0700 |
| commit | c34963e21685659eb513e1c4d847f81d8a8f13f3 (patch) | |
| tree | d4247dfb6ac918beb7b515cac71c6f334635a486 /include/linux/if_bridge.h | |
| parent | f941a6d9a9e0612eb807af822b0d1ac004da8175 (diff) | |
| download | blackbird-op-linux-c34963e21685659eb513e1c4d847f81d8a8f13f3.tar.gz blackbird-op-linux-c34963e21685659eb513e1c4d847f81d8a8f13f3.zip | |
bridge: export knowledge about the presence of IGMP/MLD queriers
With this patch other modules are able to ask the bridge whether an
IGMP or MLD querier exists on the according, bridged link layer.
Multicast snooping can only be performed if a valid, selected querier
exists on a link.
Just like the bridge only enables its multicast snooping if a querier
exists, e.g. batman-adv too can only activate its multicast
snooping in bridged scenarios if a querier is present.
For instance this export avoids having to reimplement IGMP/MLD
querier message snooping and parsing in e.g. batman-adv, when
multicast optimizations for bridged scenarios are added in the
future.
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/if_bridge.h')
| -rw-r--r-- | include/linux/if_bridge.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h index e0c575ca89f7..808dcb8cc04f 100644 --- a/include/linux/if_bridge.h +++ b/include/linux/if_bridge.h @@ -40,6 +40,7 @@ extern br_should_route_hook_t __rcu *br_should_route_hook; #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) 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); #else static inline int br_multicast_list_adjacent(struct net_device *dev, @@ -47,6 +48,11 @@ static inline int br_multicast_list_adjacent(struct net_device *dev, { return 0; } +static inline bool br_multicast_has_querier_anywhere(struct net_device *dev, + int proto) +{ + return false; +} static inline bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) { |
