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Diffstat (limited to 'udev/udev-event.c')
-rw-r--r--udev/udev-event.c83
1 files changed, 40 insertions, 43 deletions
diff --git a/udev/udev-event.c b/udev/udev-event.c
index 7785ad892c..1ecf82423f 100644
--- a/udev/udev-event.c
+++ b/udev/udev-event.c
@@ -464,8 +464,8 @@ static int rename_netif(struct udev_event *event)
struct udev_device *dev = event->dev;
int sk;
struct ifreq ifr;
+ int loop;
int err;
- char *newdup;
info(event->udev, "changing net interface name from '%s' to '%s'\n",
udev_device_get_sysname(dev), event->name);
@@ -473,61 +473,58 @@ static int rename_netif(struct udev_event *event)
sk = socket(PF_INET, SOCK_DGRAM, 0);
if (sk < 0) {
err(event->udev, "error opening socket: %m\n");
- return -1;
+ return -errno;
}
memset(&ifr, 0x00, sizeof(struct ifreq));
util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
err = ioctl(sk, SIOCSIFNAME, &ifr);
- if (err == 0)
+ if (err == 0) {
rename_netif_kernel_log(ifr);
- else {
- int loop;
-
- /* see if the destination interface name already exists */
- if (errno != EEXIST) {
- err(event->udev, "error changing netif name %s to %s: %m\n",
- ifr.ifr_name, ifr.ifr_newname);
- goto exit;
- }
+ goto out;
+ }
- /* free our own name, another process may wait for us */
- newdup = strdup(ifr.ifr_newname);
- util_strscpyl(ifr.ifr_newname, IFNAMSIZ, udev_device_get_sysname(dev), "-", newdup, NULL);
- free(newdup);
- err = ioctl(sk, SIOCSIFNAME, &ifr);
- if (err != 0) {
- err(event->udev, "error changing netif name %s to %s: %m\n",
- ifr.ifr_name, ifr.ifr_newname);
- goto exit;
- }
- rename_netif_kernel_log(ifr);
+ /* keep trying if the destination interface name already exists */
+ err = -errno;
+ if (err != -EEXIST)
+ goto out;
- /* wait 90 seconds for our target to become available */
- util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
- util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
- loop = 90 * 20;
- while (loop--) {
- const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
+ /* free our own name, another process may wait for us */
+ util_strscpyl(ifr.ifr_newname, IFNAMSIZ, udev_device_get_sysname(dev), "-", event->name, NULL);
+ err = ioctl(sk, SIOCSIFNAME, &ifr);
+ if (err < 0) {
+ err = -errno;
+ goto out;
+ }
- err = ioctl(sk, SIOCSIFNAME, &ifr);
- if (err == 0) {
- rename_netif_kernel_log(ifr);
- break;
- }
+ /* log temporary name */
+ rename_netif_kernel_log(ifr);
- if (errno != EEXIST) {
- err(event->udev, "error changing net interface name %s to %s: %m\n",
- ifr.ifr_name, ifr.ifr_newname);
- break;
- }
- dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
- event->name, (90 * 20) - loop);
- nanosleep(&duration, NULL);
+ /* wait a maximum of 90 seconds for our target to become available */
+ util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
+ util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
+ loop = 90 * 20;
+ while (loop--) {
+ const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
+
+ dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
+ event->name, (90 * 20) - loop);
+ nanosleep(&duration, NULL);
+
+ err = ioctl(sk, SIOCSIFNAME, &ifr);
+ if (err == 0) {
+ rename_netif_kernel_log(ifr);
+ break;
}
+ err = -errno;
+ if (err != -EEXIST)
+ break;
}
-exit:
+
+out:
+ if (err < 0)
+ err(event->udev, "error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
close(sk);
return err;
}