forked from pool/systemd
a0eb8a1c64
- 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
78 lines
2.6 KiB
Diff
78 lines
2.6 KiB
Diff
From: Robert Milasan <rmilasan@suse.com>
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Date: Thu, 28 Mar 2013 09:24:43 +0000
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Subject: udev always rename network
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udev: ensure that the network interfaces are renamed even if they exist
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(bnc#809843).
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---
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src/udev/udev-event.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
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1 file changed, 43 insertions(+), 3 deletions(-)
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diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
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index 3db2cb7..3ee9039 100644
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--- a/src/udev/udev-event.c
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+++ b/src/udev/udev-event.c
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@@ -750,6 +750,7 @@ static int rename_netif(struct udev_event *event)
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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_event *event)
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strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
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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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+ strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
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+ 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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