From: Atzm Watanabe <atzm@stratosphere.co.jp>
Date: Wed, 1 Oct 2014 05:47:50 +0000 (+0900)
Subject: iplink: do not require assigning negative ifindex at link creation
X-Git-Tag: v3.17.0~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=68ac9ab339783119e6a8cabfafcd9479094529b0;p=thirdparty%2Fiproute2.git

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>
---

diff --git a/ip/iplink.c b/ip/iplink.c
index cb9c87079..5dd606062 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) {