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bridge: Export multicast enabled state 

During enslavement to a bridge, after the CHANGEUPPER is sent, the
multicast enabled state of the bridge isn't propagated down to the
offloading driver unless it's changed.

This patch allows such drivers to query the multicast enabled state from
the bridge, so that they'll be able to correctly configure their flood
tables during port enslavement.

In case multicast is disabled, unregistered multicast packets can be
treated as broadcast and be flooded through all the bridge ports.

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 08:37:24 +02:00 committed by David S. Miller
parent 1f51445af3
commit 9341b988e6
2 changed files with 13 additions and 0 deletions
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5
include/linux/if_bridge.h
View File

@ -62,6 +62,7 @@ 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_enabled(const struct net_device *dev);
#else
static inline int br_multicast_list_adjacent(struct net_device *dev,
struct list_head *br_ip_list)
@ -78,6 +79,10 @@ static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
{
return false;
}
static inline bool br_multicast_enabled(const struct net_device *dev)
{
return false;
}
#endif
#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)

8
net/bridge/br_multicast.c
View File

@ -2176,6 +2176,14 @@ int br_multicast_toggle(struct net_bridge *br, unsigned long val)
return err;
}
bool br_multicast_enabled(const struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
return !br->multicast_disabled;
}
EXPORT_SYMBOL_GPL(br_multicast_enabled);
int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
{
unsigned long max_delay;