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 cb9c87079a2d94aee20327c7f82f50b613caefe4..5dd606062d9c2673288804a668b5dec5685dba90 100644 (file)
--- 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) {