debian: Save openflow flows during package upgrade.

When debian package for openvswitch-switch is upgraded,
export a variable, OVS_RESTART_SAVE_FLOWS=yes.
This will save the openflow flows in vswitchd and
re-apply it after the upgrade.

Feature #13555.
Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>

diff --git a/debian/openvswitch-switch.postinst b/debian/openvswitch-switch.postinst
index 7b9d7bc89a0e19093322e21c2e96d91836ee3901..ac6ed653acebe91100796075a924a7e2557fb351 100755 (executable)
--- a/debian/openvswitch-switch.postinst
+++ b/debian/openvswitch-switch.postinst
@@ -49,6 +49,10 @@ esac
 OVS_MISSING_KMOD_OK=yes
 export OVS_MISSING_KMOD_OK
 
+# Save and restore openflow flows during a package upgrade.
+OVS_RESTART_SAVE_FLOWS=yes
+export OVS_RESTART_SAVE_FLOWS
+
 #DEBHELPER#
 
 exit 0