7b5d1775ff
exist (bnc#809843). add: 1027-udev-always-rename-network.patch - udev: re-add persistent network rules (bnc#809843). add: 1026-re-add-persistent-net.patch - rebase all patches, ensure that they apply properly. - udev: ensure that the network interfaces are renamed even if they exist (bnc#809843). add: 1027-udev-always-rename-network.patch OBS-URL: https://build.opensuse.org/package/show/Base:System/systemd?expand=0&rev=359
68 lines
2.3 KiB
Diff
68 lines
2.3 KiB
Diff
Index: systemd-195/src/udev/udev-event.c
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===================================================================
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--- systemd-195.orig/src/udev/udev-event.c
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+++ systemd-195/src/udev/udev-event.c
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@@ -750,6 +750,7 @@ static int rename_netif(struct udev_even
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struct udev_device *dev = event->dev;
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int sk;
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struct ifreq ifr;
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+ int loop;
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int err;
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log_debug("changing net interface name from '%s' to '%s'\n",
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@@ -766,12 +767,51 @@ static int rename_netif(struct udev_even
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util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
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util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
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err = ioctl(sk, SIOCSIFNAME, &ifr);
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- if (err >= 0) {
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+ if (err == 0) {
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print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname);
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- } else {
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+ goto out;
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+ }
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+
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+ /* keep trying if the destination interface name already exists */
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+ err = -errno;
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+ if (err != -EEXIST) {
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+ goto out;
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+ }
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+
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+ /* free our own name, another process may wait for us */
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+ snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev));
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+ err = ioctl(sk, SIOCSIFNAME, &ifr);
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+ if (err < 0) {
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err = -errno;
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- log_error("error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
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+ goto out;
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}
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+
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+ /* log temporary name */
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+ print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname);
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+
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+ /* wait a maximum of 90 seconds for our target to become available */
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+ util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
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+ util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
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+ loop = 90 * 20;
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+ while (loop--) {
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+ const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
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+
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+ log_debug("wait for netif '%s' to become free, loop=%i\n", event->name, (90 * 20) - loop);
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+ nanosleep(&duration, NULL);
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+
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+ err = ioctl(sk, SIOCSIFNAME, &ifr);
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+ if (err == 0) {
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+ print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname);
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+ break;
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+ }
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+ err = -errno;
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+ if (err != -EEXIST)
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+ break;
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+ }
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+
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+out:
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+ if (err < 0)
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+ log_error("error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
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close(sk);
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return err;
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}
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