xenserver: use ovs-vsctl for VIF VLANs instead of separate state files

ovs-vsctl did not exist when this code was originally written, but it
provides exactly what is needed to get rid of those separate state
files.

The vif hotplug script diff is against the xs5.7 branch but I think is
applicable to master and/or citrix with just context changes.

I was thinking of using ovs-vsctl exclusively for configuration
modifications from the vif hotplug script but that would need a
mechanism to pass the additional vif details to ovs-vsctl add-port as
well as perhaps making the bridge optional to del-port. The other option
would be to use the --no-reload option and split the config mods into
two parts, but I don't like that idea much.

diff --git a/xenserver/etc_xensource_scripts_vif b/xenserver/etc_xensource_scripts_vif
index 04aa2bb..dc9cb7b 100755 (executable)
--- a/xenserver/etc_xensource_scripts_vif
+++ b/xenserver/etc_xensource_scripts_vif
@@ -12,6 +12,7 @@
 # Keep other-config/ keys in sync with device.ml:vif_udev_keys
 
 cfg_mod="/usr/bin/ovs-cfg-mod"
+vsctl="/usr/bin/ovs-vsctl"
 dump_vif_details="/usr/share/vswitch/scripts/dump-vif-details"
 service="/sbin/service"
 
@@ -70,13 +71,11 @@ add_to_bridge()
     fi
     logger -t scripts-vif "Adding ${vif} to ${bridge} with address ${address}"
 
-    vid=
-    if [ -e "/var/lib/openvswitch/br-$bridge" ]; then
-       . "/var/lib/openvswitch/br-$bridge"
-       if [ -n "$VLAN_SLAVE" -a -n "$VLAN_VID" ]; then
-           bridge=$VLAN_SLAVE
-           vid="--add=vlan.$vif.tag=$VLAN_VID"
-       fi
+    local VLAN_ID=$($vsctl br-to-vlan $bridge)
+    local vid=
+    if [ "$VLAN_ID" -ne 0 ] ; then
+       bridge=$($vsctl br-to-parent $bridge)
+       vid="--add=vlan.${dev}.tag=${VLAN_ID}"
     fi
 
     ${IP} link set "${vif}" down                        || logger -t scripts-vif "Failed to ip link set ${vif} down"

diff --git a/xenserver/opt_xensource_libexec_interface-reconfigure b/xenserver/opt_xensource_libexec_interface-reconfigure
index 7b0c9ef..e9f56dd 100755 (executable)
--- a/xenserver/opt_xensource_libexec_interface-reconfigure
+++ b/xenserver/opt_xensource_libexec_interface-reconfigure
@@ -1473,17 +1473,6 @@ def action_up(pif):
         cfgmod_argv += ['--add=vlan.%s.tag=%s' % (ipdev, pifrec['VLAN'])]
         cfgmod_argv += ['--add=iface.%s.internal=true' % (ipdev)]
         cfgmod_argv += ['--add=iface.%s.fake-bridge=true' % (ipdev)]
-        if not os.path.exists(vswitch_state_dir):
-            os.mkdir(vswitch_state_dir)
-        br = ConfigurationFile("br-%s" % ipdev, vswitch_state_dir)
-        br.write("VLAN_SLAVE=%s\n" % bridge)
-        br.write("VLAN_VID=%s\n" % pifrec['VLAN'])
-        br.close()
-        f.attach_child(br)
-    else:
-        br = ConfigurationFile("br-%s" % ipdev, vswitch_state_dir)
-        br.unlink()
-        f.attach_child(br)
         
     # Apply updated configuration.
     try: