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systemd/1006-udev-always-rename-network.patch
Stephan Kulow a0eb8a1c64 Accepting request 173533 from Base:System
- Fix handle-etc-HOSTNAME.patch to properly set hostname at startup
  when using /etc/HOSTNAME. (forwarded request 173532 from fcrozat)

OBS-URL: https://build.opensuse.org/request/show/173533
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/systemd?expand=0&rev=136
2013-04-26 17:21:58 +00:00

78 lines
2.6 KiB
Diff

From: Robert Milasan <rmilasan@suse.com>
Date: Thu, 28 Mar 2013 09:24:43 +0000
Subject: udev always rename network
udev: ensure that the network interfaces are renamed even if they exist
(bnc#809843).
---
src/udev/udev-event.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 43 insertions(+), 3 deletions(-)
diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
index 3db2cb7..3ee9039 100644
--- a/src/udev/udev-event.c
+++ b/src/udev/udev-event.c
@@ -750,6 +750,7 @@ static int rename_netif(struct udev_event *event)
struct udev_device *dev = event->dev;
int sk;
struct ifreq ifr;
+ int loop;
int err;
log_debug("changing net interface name from '%s' to '%s'\n",
@@ -766,12 +767,51 @@ static int rename_netif(struct udev_event *event)
strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
err = ioctl(sk, SIOCSIFNAME, &ifr);
- if (err >= 0) {
+ if (err == 0) {
print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname);
- } else {
+ goto out;
+ }
+
+ /* keep trying if the destination interface name already exists */
+ err = -errno;
+ if (err != -EEXIST) {
+ goto out;
+ }
+
+ /* free our own name, another process may wait for us */
+ snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev));
+ err = ioctl(sk, SIOCSIFNAME, &ifr);
+ if (err < 0) {
err = -errno;
- log_error("error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
+ goto out;
}
+
+ /* log temporary name */
+ print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname);
+
+ /* wait a maximum of 90 seconds for our target to become available */
+ strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
+ strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
+ loop = 90 * 20;
+ while (loop--) {
+ const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
+
+ log_debug("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) {
+ print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname);
+ break;
+ }
+ err = -errno;
+ if (err != -EEXIST)
+ break;
+ }
+
+out:
+ if (err < 0)
+ log_error("error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
close(sk);
return err;
}