1 Subject: [PATCH] keep track of network interface renaming
2 From: Olaf Hering <olh@suse.de>
4 Keep track about which network interface names were renamed after the
5 network device driver printed its banner. Example insanity:
7 honeydew:~ # dmesg| grep -Ew '(eth[0-9]|rename|renamed)'
8 e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
9 e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection
10 e1000: eth2: e1000_probe: Intel(R) PRO/1000 Network Connection
11 e1000: eth3: e1000_probe: Intel(R) PRO/1000 Network Connection
12 dev_change_name: about to rename 'eth3' to 'eth0'
13 dev_change_name: about to rename 'eth3' to 'ethxx3'
14 eth3 renamed to ethxx3
15 dev_change_name: about to rename 'ethxx3' to 'eth0'
16 dev_change_name: about to rename 'eth0' to 'eth3'
18 dev_change_name: about to rename 'eth1' to 'eth2'
19 dev_change_name: about to rename 'eth1' to 'ethxx1'
20 eth1 renamed to ethxx1
21 dev_change_name: about to rename 'ethxx1' to 'eth2'
22 dev_change_name: about to rename 'eth2' to 'eth1'
24 dev_change_name: about to rename 'ethxx3' to 'eth0'
25 ethxx3 renamed to eth0
26 dev_change_name: about to rename 'ethxx1' to 'eth2'
27 ethxx1 renamed to eth2
28 e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex
32 Signed-off-by: Olaf Hering <olh@suse.de>
34 net/core/dev.c | 4 ++++
35 1 file changed, 4 insertions(+)
39 @@ -922,7 +922,11 @@ int dev_change_name(struct net_device *d
40 else if (__dev_get_by_name(net, newname))
44 + if (strncmp(newname, dev->name, IFNAMSIZ))
45 + printk(KERN_INFO "%s renamed to %s by %s [%u]\n", dev->name, newname, current->comm, current->pid);
46 strlcpy(dev->name, newname, IFNAMSIZ);
50 err = device_rename(&dev->dev, dev->name);