netdev-linux: make tap devices persistent.
When using data path type "netdev", bridge port is a tun device
and when OVS restarts, that device and its network configuration
is lost.
This patch enables the tap device to persist instead.
@@ -866,6 +866,13 @@ netdev_linux_construct_tap(struct netdev *netdev_)
goto error_close;
}
+ if (ioctl(netdev->tap_fd, TUNSETPERSIST, 1)) {
+ VLOG_WARN("%s: creating tap device failed (persist): %s", name,
+ ovs_strerror(errno));
+ error = errno;
+ goto error_close;
+ }
+
return 0;
error_close:
@@ -885,6 +892,7 @@ netdev_linux_destruct(struct netdev *netdev_)
if (netdev_get_class(netdev_) == &netdev_tap_class
&& netdev->tap_fd >= 0)
{
+ ioctl(netdev->tap_fd, TUNSETPERSIST, 0);
close(netdev->tap_fd);
}
