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authorYotam Gigi <yotamg@mellanox.com>2017-10-09 11:15:32 +0200
committerDavid S. Miller <davem@davemloft.net>2017-10-09 10:18:11 -0700
commit0912bda436388a02c72164b4b490b578e64c012e (patch)
treee9781f8b94b8c472e05281683fa9988c43a4e3a2 /net/bridge/br_multicast.c
parent77041420751fe6d4acf2103b245dcc2b4b7b8360 (diff)
net: bridge: Export bridge multicast router state
Add an access function that, given a bridge netdevice, returns whether the bridge device is currently an mrouter or not. The function uses the already existing br_multicast_is_router function to check that. This function is needed in order to allow ports that join an already existing bridge to know the current mrouter state of the bridge device. Together with the bridge device mrouter ports switchdev notifications, it is possible to have full offloading of the semantics of the bridge device mcast router state. Due to the fact that the bridge multicast router status can change in packet RX path, take the multicast_router bridge spinlock to protect the read. Signed-off-by: Yotam Gigi <yotamg@mellanox.com> Reviewed-by: Nogah Frankel <nogahf@mellanox.com> Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_multicast.c')
-rw-r--r--net/bridge/br_multicast.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index bd50550dd4ca..7947e0436e18 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -2216,6 +2216,18 @@ bool br_multicast_enabled(const struct net_device *dev)
}
EXPORT_SYMBOL_GPL(br_multicast_enabled);
+bool br_multicast_router(const struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+ bool is_router;
+
+ spin_lock_bh(&br->multicast_lock);
+ is_router = br_multicast_is_router(br);
+ spin_unlock_bh(&br->multicast_lock);
+ return is_router;
+}
+EXPORT_SYMBOL_GPL(br_multicast_router);
+
int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
{
unsigned long max_delay;