From 68ac9ab339783119e6a8cabfafcd9479094529b0 Mon Sep 17 00:00:00 2001
From: Atzm Watanabe <atzm@stratosphere.co.jp>
Date: Wed, 1 Oct 2014 14:47:50 +0900
Subject: [PATCH] iplink: do not require assigning negative ifindex at link
 creation

Since commit 3c682146aeff, iplink requires assigning negative
ifindex (-1) to the kernel when creating interface without
specifying index.

v2: checking whether index is -1, suggested by Cong Wang.

Cc: Cong Wang <cwang@twopensource.com>
Signed-off-by: Atzm Watanabe <atzm@stratosphere.co.jp>
Acked-by:  Cong Wang <cwang@twopensource.com>
---
 ip/iplink.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ip/iplink.c b/ip/iplink.c
index cb9c8707..5dd60606 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -689,7 +689,10 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
 			addattr_l(&req.n, sizeof(req), IFLA_LINK, &ifindex, 4);
 		}
 
-		req.i.ifi_index = index;
+		if (index == -1)
+			req.i.ifi_index = 0;
+		else
+			req.i.ifi_index = index;
 	}
 
 	if (name) {