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" <[email protected]>
CC: Eric Dumazet <[email protected]>
CC: Vlad Yasevich <[email protected]>
CC: stephen hemminger <[email protected]>
CC: Jerry Chu <[email protected]>
CC: Ben Hutchings <[email protected]>
CC: David Laight <[email protected]>
Signed-off-by: Veaceslav Falico <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/net/core/dev.c b/net/core/dev.c
index 81d61014fd9b30bb0bc0e9cf34b856293ac2e9cd..e52a3788d18d3a0e4b6956265d20441f2d2dd764 100644 (file)
--- 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;