diff options
| author | Arkadi Sharshevsky <arkadis@mellanox.com> | 2017-06-08 08:44:12 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-08 14:16:24 -0400 |
| commit | 0baa10fff2c8a8a0e3bca8fb43112ed93c179c38 (patch) | |
| tree | 9ba7694bb4d36536b1a0ba8efb0658daacc7723e /net/bridge | |
| parent | 3922285d96e79231817227439c214728edfbe406 (diff) | |
| download | op-kernel-dev-0baa10fff2c8a8a0e3bca8fb43112ed93c179c38.zip op-kernel-dev-0baa10fff2c8a8a0e3bca8fb43112ed93c179c38.tar.gz | |
net: bridge: Add support for calling FDB external learning under rcu
This is done as a preparation to moving the switchdev notifier chain
to be atomic. The FDB external learning should be called under rtnl
or rcu.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@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')
| -rw-r--r-- | net/bridge/br.c | 4 | ||||
| -rw-r--r-- | net/bridge/br_fdb.c | 2 | ||||
| -rw-r--r-- | net/bridge/br_private.h | 6 |
3 files changed, 8 insertions, 4 deletions
diff --git a/net/bridge/br.c b/net/bridge/br.c index 889e564..e962fff 100644 --- a/net/bridge/br.c +++ b/net/bridge/br.c @@ -121,7 +121,7 @@ static struct notifier_block br_device_notifier = { .notifier_call = br_device_event }; -/* called with RTNL */ +/* called with RTNL or RCU */ static int br_switchdev_event(struct notifier_block *unused, unsigned long event, void *ptr) { @@ -131,7 +131,7 @@ static int br_switchdev_event(struct notifier_block *unused, struct switchdev_notifier_fdb_info *fdb_info; int err = NOTIFY_DONE; - p = br_port_get_rtnl(dev); + p = br_port_get_rtnl_rcu(dev); if (!p) goto out; diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index ab0c7cc..5c780cd 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -1075,7 +1075,6 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, struct net_bridge_fdb_entry *fdb; int err = 0; - ASSERT_RTNL(); spin_lock_bh(&br->hash_lock); head = &br->hash[br_mac_hash(addr, vid)]; @@ -1110,7 +1109,6 @@ int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, struct net_bridge_fdb_entry *fdb; int err = 0; - ASSERT_RTNL(); spin_lock_bh(&br->hash_lock); fdb = br_fdb_find(br, addr, vid); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 7f43992..a122684 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -284,6 +284,12 @@ static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device * rtnl_dereference(dev->rx_handler_data) : NULL; } +static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) +{ + return br_port_exists(dev) ? + rcu_dereference_rtnl(dev->rx_handler_data) : NULL; +} + struct net_bridge { spinlock_t lock; spinlock_t hash_lock; |
