From: Tom Gundersen <teg@jklm.no>
Date: Mon, 14 Jul 2014 14:37:23 +0000 (+0200)
Subject: net: set name assign type for renamed devices
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=238fa3623a5709d29673ed78ff8e714d040fbb89;p=openwrt%2Fstaging%2Fblogic.git

net: set name assign type for renamed devices

Based on a patch from David Herrmann.

This is the only place devices can be renamed.

v9: restore revers-christmas-tree order of local variables

Signed-off-by: Tom Gundersen <teg@jklm.no>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 6e2a2cd82321..38793fb84a35 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1082,6 +1082,7 @@ static int dev_get_valid_name(struct net *net,
  */
 int dev_change_name(struct net_device *dev, const char *newname)
 {
+	unsigned char old_assign_type;
 	char oldname[IFNAMSIZ];
 	int err = 0;
 	int ret;
@@ -1109,10 +1110,14 @@ int dev_change_name(struct net_device *dev, const char *newname)
 		return err;
 	}
 
+	old_assign_type = dev->name_assign_type;
+	dev->name_assign_type = NET_NAME_RENAMED;
+
 rollback:
 	ret = device_rename(&dev->dev, dev->name);
 	if (ret) {
 		memcpy(dev->name, oldname, IFNAMSIZ);
+		dev->name_assign_type = old_assign_type;
 		write_seqcount_end(&devnet_rename_seq);
 		return ret;
 	}
@@ -1141,6 +1146,8 @@ rollback:
 			write_seqcount_begin(&devnet_rename_seq);
 			memcpy(dev->name, oldname, IFNAMSIZ);
 			memcpy(oldname, newname, IFNAMSIZ);
+			dev->name_assign_type = old_assign_type;
+			old_assign_type = NET_NAME_RENAMED;
 			goto rollback;
 		} else {
 			pr_err("%s: name change rollback failed: %d\n",