From 3f712cd14c3af1ba2d177f5aa72ee63df9a41d0f Mon Sep 17 00:00:00 2001
From: Umut Tezduyar Lindskog <umut.tezduyar@axis.com>
Date: Fri, 22 May 2015 16:02:09 +0200
Subject: [PATCH] nspawn: be verbose about interface names

Allowed interface name is relatively small. Lets not make
users go in to the source code to figure out what happened.

--machine=debian-tree conflicts with
--machine=debian-tree2

ex: Failed to add new veth \
         interfaces (host0, vb-debian-tree): File exists

(cherry picked from commit 637aa8a36ce21e0c83466d9b91ee1bfad2404d1c)
---
 src/nspawn/nspawn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index 500936387f..646edea700 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -2627,7 +2627,7 @@ static int setup_veth(pid_t pid, char iface_name[IFNAMSIZ], int *ifi) {
 
         r = sd_rtnl_call(rtnl, m, 0, NULL);
         if (r < 0)
-                return log_error_errno(r, "Failed to add new veth interfaces: %m");
+                return log_error_errno(r, "Failed to add new veth interfaces (host0, %s): %m", iface_name);
 
         i = (int) if_nametoindex(iface_name);
         if (i <= 0)