From 6fe82a39e583a50f28f03b294df79c9de9ec0de4 Mon Sep 17 00:00:00 2001
From: Veaceslav Falico <vfalico@gmail.com>
Date: Thu, 17 Jul 2014 20:33:32 +0200
Subject: [PATCH] net: print a notification on device rename

Currently it's done silently (from the kernel part), and thus it might be
hard to track the renames from logs.

Add a simple netdev_info() to notify the rename, but only in case the
previous name was valid.

CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Vlad Yasevich <vyasevic@redhat.com>
CC: stephen hemminger <stephen@networkplumber.org>
CC: Jerry Chu <hkchu@google.com>
CC: Ben Hutchings <bhutchings@solarflare.com>
CC: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Veaceslav Falico <vfalico@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/core/dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/core/dev.c b/net/core/dev.c
index 81d61014fd9b..e52a3788d18d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1113,6 +1113,9 @@ int dev_change_name(struct net_device *dev, const char *newname)
 		return err;
 	}
 
+	if (oldname[0] && !strchr(oldname, '%'))
+		netdev_info(dev, "renamed from %s\n", oldname);
+
 	old_assign_type = dev->name_assign_type;
 	dev->name_assign_type = NET_NAME_RENAMED;
 
-- 
2.20.1