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bridge: Export VLAN filtering state

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It's useful for drivers supporting bridge offload to be able to query
the bridge's VLAN filtering state.

Currently, upon enslavement to a bridge master, the offloading driver
will only learn about the bridge's VLAN filtering state after the bridge
device was already linked with its slave.

Being able to query the bridge's VLAN filtering state allows such
drivers to forbid enslavement in case resource couldn't be allocated for
a VLAN-aware bridge and also choose the correct initialization routine
for the enslaved port, which is dependent on the bridge type.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2017-05-26 08:37:23 +02:00 • committed by David S. Miller
parent 5f9e27e60e
commit 1f51445af3
6 changed files with 21 additions and 13 deletions
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9
include/linux/if_bridge.h
View file

@ -80,4 +80,13 @@ static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
}
#endif
#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)
bool br_vlan_enabled(const struct net_device *dev);
#else
static inline bool br_vlan_enabled(const struct net_device *dev)
{
return false;
}
#endif
#endif