xenserver: Restore XS5.5 compatibility for vif script.

XAPI in XenServer 5.5 does not put the vif-uuid or network-uuid into
XenStore, so the vif script needs to query xapi for those attributes in
that case.

Tested with XenServer 5.5.0 update 1 and XenServer 5.5.9 build 29381
(the latter just to make sure I didn't break anything).

Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/xenserver/etc_xensource_scripts_vif b/xenserver/etc_xensource_scripts_vif
index 3a209f9..0281904 100755 (executable)
--- a/xenserver/etc_xensource_scripts_vif
+++ b/xenserver/etc_xensource_scripts_vif
@@ -25,6 +25,16 @@ IP="/sbin/ip"
 
 vsctl="/usr/bin/ovs-vsctl"
 
+# XAPI before build 29381 (approximately) did not provide some of the
+# data in XenStore that we rely on.
+. /etc/xensource-inventory
+if test "$PRODUCT_VERSION" = "5.5.0" || test "${BUILD_NUMBER%p}" -le 26131
+then
+    xs550=true
+else
+    xs550=false
+fi
+
 handle_promiscuous()
 {
     local arg=$(xenstore-read "${PRIVATE}/other-config/promiscuous" 2>/dev/null)
@@ -77,36 +87,40 @@ set_vif_external_id()
 
 handle_vswitch_vif_details()
 {
-    local vif_details=
-    local net_uuid=$(xenstore-read "${PRIVATE}/network-uuid" 2>/dev/null)
-    if [ -n "${net_uuid}" ] ; then
-       set_vif_external_id "xs-network-uuid" "${net_uuid}"
+    local vm=$(xenstore-read "/local/domain/$DOMID/vm" 2>/dev/null)
+    if [ $? -eq 0 -a -n "${vm}" ] ; then
+       local vm_uuid=$(xenstore-read "$vm/uuid" 2>/dev/null)
     fi
-
-    local address=$(xenstore-read "/local/domain/$DOMID/device/vif/$DEVID/mac" 2>/dev/null)
-    if [ -n "${address}" ] ; then
-       set_vif_external_id "xs-vif-mac" "${address}"
+    if [ -n "${vm_uuid}" ] ; then
+       set_vif_external_id "xs-vm-uuid" "${vm_uuid}"
     fi
 
     local vif_uuid=$(xenstore-read "${PRIVATE}/vif-uuid" 2>/dev/null)
+    if $xs550 && [ -z "${vif_uuid}" ] && [ -n "${vm_uuid}" ]; then
+        vif_uuid=$(xe vif-list --minimal vm-uuid="${vm_uuid}" device=$DEVID)
+    fi
     if [ -n "${vif_uuid}" ] ; then
        set_vif_external_id "xs-vif-uuid" "${vif_uuid}"
     fi
 
-    local vm=$(xenstore-read "/local/domain/$DOMID/vm" 2>/dev/null)
-    if [ $? -eq 0 -a -n "${vm}" ] ; then
-       local vm_uuid=$(xenstore-read "$vm/uuid" 2>/dev/null)
+    local vif_details=
+    local net_uuid=$(xenstore-read "${PRIVATE}/network-uuid" 2>/dev/null)
+    if $xs550 && [ -z "${net_uuid}" ] && [ -n "${vif_uuid}" ]; then
+        net_uuid=$(xe vif-param-get uuid="${vif_uuid}" param-name=network-uuid)
     fi
-    if [ -n "${vm_uuid}" ] ; then
-       set_vif_external_id "xs-vm-uuid" "${vm_uuid}"
+    if [ -n "${net_uuid}" ] ; then
+       set_vif_external_id "xs-network-uuid" "${net_uuid}"
+    fi
+
+    local address=$(xenstore-read "/local/domain/$DOMID/device/vif/$DEVID/mac" 2>/dev/null)
+    if [ -n "${address}" ] ; then
+       set_vif_external_id "xs-vif-mac" "${address}"
     fi
 }
 
 xs550_set_internal_network_uuid()
 {
-    . /etc/xensource-inventory
-    if test "$PRODUCT_VERSION" = "5.5.0" || test "${BUILD_NUMBER%p}" -le 26131
-    then
+    if $xs550; then
         # vNetManager needs to know the network UUID(s) associated with each
         # datapath.  Normally interface-reconfigure adds them, but XAPI does
         # not use interface-reconfigure for internal networks. Instead, XAPI
@@ -122,9 +136,6 @@ xs550_set_internal_network_uuid()
             logger -t scripts-vif "${bridge} xs-network-uuids ${net_uuid}"
             echo "-- br-set-external-id $bridge xs-network-uuids ${net_uuid}"
         fi
-    else
-        # XAPI after 5.5.0 sets the network external ids itself, via ovs-vsctl.
-        :
     fi
 }