54 lines
1.8 KiB
Diff
54 lines
1.8 KiB
Diff
Subject: [PATCH] keep track of network interface renaming
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From: Olaf Hering <olh@suse.de>
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Patch-mainline: not yet
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Keep track about which network interface names were renamed after the
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network device driver printed its banner. Example insanity:
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honeydew:~ # dmesg| grep -Ew '(eth[0-9]|rename|renamed)'
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e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
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e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection
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e1000: eth2: e1000_probe: Intel(R) PRO/1000 Network Connection
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e1000: eth3: e1000_probe: Intel(R) PRO/1000 Network Connection
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dev_change_name: about to rename 'eth3' to 'eth0'
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dev_change_name: about to rename 'eth3' to 'ethxx3'
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eth3 renamed to ethxx3
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dev_change_name: about to rename 'ethxx3' to 'eth0'
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dev_change_name: about to rename 'eth0' to 'eth3'
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eth0 renamed to eth3
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dev_change_name: about to rename 'eth1' to 'eth2'
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dev_change_name: about to rename 'eth1' to 'ethxx1'
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eth1 renamed to ethxx1
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dev_change_name: about to rename 'ethxx1' to 'eth2'
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dev_change_name: about to rename 'eth2' to 'eth1'
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eth2 renamed to eth1
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dev_change_name: about to rename 'ethxx3' to 'eth0'
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ethxx3 renamed to eth0
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dev_change_name: about to rename 'ethxx1' to 'eth2'
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ethxx1 renamed to eth2
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e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex
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Signed-off-by: Olaf Hering <olh@suse.de>
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net/core/dev.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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--- a/net/core/dev.c
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+++ b/net/core/dev.c
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@@ -945,8 +945,12 @@ static int dev_get_valid_name(struct net
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return __dev_alloc_name(net, name, buf);
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else if (__dev_get_by_name(net, name))
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return -EEXIST;
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- else if (buf != name)
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+ else if (buf != name) {
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+ if (strncmp(name, buf, IFNAMSIZ))
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+ printk(KERN_INFO "%s renamed to %s by %s [%u]\n",
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+ buf, name, current->comm, current->pid);
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strlcpy(buf, name, IFNAMSIZ);
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+ }
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return 0;
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}
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