From a404826e90632541d50f58d651271e7a8752cc1f Mon Sep 17 00:00:00 2001
From: Andrew Evans <aevans@nicira.com>
Date: Wed, 19 Jan 2011 14:50:01 -0800
Subject: [PATCH] netdev-vport: Report carrier state of tunnel egress
 interfaces.

Record carrier state of tunnel egress interface in
"tunnel_egress_iface_carrier" key in "status" map of Interface table.
---
 lib/netdev-vport.c   | 9 +++++++++
 vswitchd/vswitch.xml | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index 2d0d9845a..864945337 100644
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -362,7 +362,16 @@ netdev_vport_get_status(const struct netdev *netdev, struct shash *sh)
     const char *iface = netdev_vport_get_tnl_iface(netdev);
 
     if (iface) {
+        struct netdev *egress_netdev;
+
         shash_add(sh, "tunnel_egress_iface", xstrdup(iface));
+
+        if (!netdev_open_default(iface, &egress_netdev)) {
+            shash_add(sh, "tunnel_egress_iface_carrier",
+                      xstrdup(netdev_get_carrier(egress_netdev)
+                              ? "up" : "down"));
+            netdev_close(egress_netdev);
+        }
     }
 
     return 0;
diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index d92489ced..dfa3f20a0 100644
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -1062,6 +1062,12 @@
                 traffic destined for the configured <code>remote_ip</code>.
                 This could be an internal interface such as a bridge port.</dd>
         </dl>
+        <dl>
+            <dt><code>tunnel_egress_iface_carrier</code></dt>
+            <dd>Whether a carrier is detected on <ref
+            column="tunnel_egress_iface"/>.  Valid values are <code>down</code>
+            and <code>up</code>.</dd>
+        </dl>
       </column>
     </group>
 
-- 
2.43.0