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openvswitch: Simplify datapath locking.

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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>
This commit is contained in:
Pravin B Shelar 2013-04-15 13:23:03 -07:00 • committed by Jesse Gross
parent b4f9e8cdc8
commit 8e4e1713e4
7 changed files with 298 additions and 167 deletions
Download patch file Download diff file Expand all files Collapse all files

8
net/openvswitch/vport-netdev.c
View file

@ -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);
}