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Code

write changed network interface names to the kernel log

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This commit is contained in:
Kay Sievers 2007-08-02 23:54:10 +02:00
parent dcfa2acce3
commit 56a8a8836d
1 changed files with 26 additions and 2 deletions
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28
udev_device.c
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@ -78,6 +78,26 @@ dev_t udev_device_get_devt(struct udevice *udev)
return makedev(0, 0);
}
static void kernel_log(struct ifreq ifr)
{
int klog;
FILE *f;
klog = open("/dev/kmsg", O_WRONLY);
if (klog < 0)
return;
f = fdopen(klog, "w");
if (f == NULL) {
close(klog);
return;
}
fprintf(f, "<6>udev: renamed network interface %s to %s\n",
ifr.ifr_name, ifr.ifr_newname);
fclose(f);
}
static int rename_netif(struct udevice *udev)
{
int sk;
@ -98,7 +118,9 @@ static int rename_netif(struct udevice *udev)
strlcpy(ifr.ifr_name, udev->dev->kernel, IFNAMSIZ);
strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
retval = ioctl(sk, SIOCSIFNAME, &ifr);
if (retval != 0) {
if (retval == 0)
kernel_log(ifr);
else {
int loop;
/* see if the destination interface name already exists */
@ -122,8 +144,10 @@ static int rename_netif(struct udevice *udev)
loop = 30 * 20;
while (loop--) {
retval = ioctl(sk, SIOCSIFNAME, &ifr);
if (retval == 0)
if (retval == 0) {
kernel_log(ifr);
break;
}
if (errno != EEXIST) {
err("error changing net interface name %s to %s: %s",