Upstream commit:
Each openvswitch tunnel vport (vxlan,gre,geneve) holds a reference
to the underlying tunnel device, but never released it when such
device is deleted.
Deleting the underlying device via the ip tool cause the kernel to
hangup in the netdev_wait_allrefs() loop.
This commit ensure that on device unregistration dp_detach_port_notify()
is called for all vports that hold the device reference, properly
releasing it.
Fixes: 614732eaa12d ("openvswitch: Use regular VXLAN net_device device")
Fixes: b2acd1dc3949 ("openvswitch: Use regular GRE net_device instead of
vport")
Fixes: 6b001e682e90 ("openvswitch: Use Geneve device.")
Signed-off-by: Paolo Abeni <[email protected]>
Acked-by: Flavio Leitner <[email protected]>
Acked-by: Pravin B Shelar <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Upstream: 131753030("openvswitch: fix hangup on vxlan/gre/geneve device
deletion").
Signed-off-by: Pravin B Shelar <[email protected]>
---
datapath/dp_notify.c | 2 +-
datapath/vport-netdev.c | 10 ++++++++--
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/datapath/dp_notify.c b/datapath/dp_notify.c
index 9434c19..424f35d 100644
--- a/datapath/dp_notify.c
+++ b/datapath/dp_notify.c
@@ -60,7 +60,7 @@ void ovs_dp_notify_wq(struct work_struct *work)
struct hlist_node *n;
hlist_for_each_entry_safe(vport, n, &dp->ports[i],
dp_hash_node) {
- if (vport->ops->type != OVS_VPORT_TYPE_NETDEV)
+ if (vport->ops->type == OVS_VPORT_TYPE_INTERNAL)
continue;
if (!(vport->dev->priv_flags &
IFF_OVS_DATAPATH))
diff --git a/datapath/vport-netdev.c b/datapath/vport-netdev.c
index 21431d3..a1df79b 100644
--- a/datapath/vport-netdev.c
+++ b/datapath/vport-netdev.c
@@ -213,9 +213,15 @@ void ovs_netdev_tunnel_destroy(struct vport *vport)
if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
ovs_netdev_detach_dev(vport);
- /* Early release so we can unregister the device */
+ /* We can be invoked by both explicit vport deletion and
+ * underlying netdev deregistration; delete the link only
+ * if it's not already shutting down.
+ */
+
+ if (vport->dev->reg_state == NETREG_REGISTERED)
+ rtnl_delete_link(vport->dev);
+
dev_put(vport->dev);
- rtnl_delete_link(vport->dev);
vport->dev = NULL;
rtnl_unlock();
--
1.7.1
_______________________________________________
dev mailing list
[email protected]
http://openvswitch.org/mailman/listinfo/dev
