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authorPravin B Shelar <pshelar@nicira.com>2013-04-16 00:23:03 +0400
committerJesse Gross <jesse@nicira.com>2013-04-16 01:38:40 +0400
commit8e4e1713e4978447c5f799aa668dcc6d2cb0dee9 (patch)
treedc0c2e05b677183d617d74020fa9d1ed28691102 /net/openvswitch/vport-netdev.c
parentb4f9e8cdc82e4a07c3ca50395af5800a6229363e (diff)
downloadlinux-8e4e1713e4978447c5f799aa668dcc6d2cb0dee9.tar.xz
openvswitch: Simplify datapath locking.
Currently OVS uses combination of genl and rtnl lock to protect datapath state. This was done due to networking stack locking. But this has complicated locking and there are few lock ordering issues with new tunneling protocols. Following patch simplifies locking by introducing new ovs mutex and now this lock is used to protect entire ovs state. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'net/openvswitch/vport-netdev.c')
-rw-r--r--net/openvswitch/vport-netdev.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c
index 2130d61c384a..40a89ae8e19f 100644
--- a/net/openvswitch/vport-netdev.c
+++ b/net/openvswitch/vport-netdev.c
@@ -100,16 +100,20 @@ static struct vport *netdev_create(const struct vport_parms *parms)
goto error_put;
}
+ rtnl_lock();
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
- goto error_put;
+ goto error_unlock;
dev_set_promiscuity(netdev_vport->dev, 1);
netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;
+ rtnl_unlock();
return vport;
+error_unlock:
+ rtnl_unlock();
error_put:
dev_put(netdev_vport->dev);
error_free_vport:
@@ -131,9 +135,11 @@ static void netdev_destroy(struct vport *vport)
{
struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
+ rtnl_lock();
netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(netdev_vport->dev);
dev_set_promiscuity(netdev_vport->dev, -1);
+ rtnl_unlock();
call_rcu(&netdev_vport->rcu, free_port_rcu);
}