78 lines
2.7 KiB
Diff
78 lines
2.7 KiB
Diff
From: Robert Milasan <rmilasan@suse.com>
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Cc: Werner Fink <werner@suse.de>
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Subject: udev always rename network
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Date: Thu, 28 Mar 2013 09:24:43 +0000
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udev: ensure that the network interfaces are renamed even if they exist (bnc#809843).
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Date: Tue, 4 Mar 2014 10:29:21 +0000
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Port the patch of Robert to systemd v210 and test it out.
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---
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udev-event.c | 42 ++++++++++++++++++++++++++++++++++++++----
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1 file changed, 38 insertions(+), 4 deletions(-)
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--- systemd-210/src/udev/udev-event.c
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+++ systemd-210/src/udev/udev-event.c 2014-03-27 13:19:06.727748307 +0000
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@@ -750,8 +750,9 @@ static int rename_netif(struct udev_even
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struct udev_device *dev = event->dev;
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_cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
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char name[IFNAMSIZ];
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+ char interim[IFNAMSIZ], *ptr = &interim[0];
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const char *oldname;
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- int r;
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+ int r, loop;
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oldname = udev_device_get_sysname(dev);
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@@ -765,12 +766,45 @@ static int rename_netif(struct udev_even
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return r;
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r = rtnl_set_link_name(rtnl, udev_device_get_ifindex(dev), name);
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- if (r < 0)
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+ if (r == 0) {
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+ print_kmsg("renamed network interface %s to %s\n", oldname, name);
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+ return r;
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+ } else if (r != -EEXIST) {
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log_error("error changing net interface name %s to %s: %s",
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oldname, name, strerror(-r));
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- else
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- print_kmsg("renamed network interface %s to %s", oldname, name);
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+ return r;
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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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+ strpcpyf(&ptr, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev));
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+
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+ r = rtnl_set_link_name(rtnl, udev_device_get_ifindex(dev), interim);
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+ if (r < 0) {
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+ log_error("error changing net interface name %s to %s: %s",
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+ oldname, interim, strerror(-r));
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+ return r;
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+ }
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+ /* log temporary name */
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+ print_kmsg("renamed network interface %s to %s\n", oldname, interim);
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+
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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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+ nanosleep(&duration, NULL);
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+
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+ r = rtnl_set_link_name(rtnl, udev_device_get_ifindex(dev), name);
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+ if (r == 0) {
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+ print_kmsg("renamed network interface %s to %s\n", interim, name);
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+ break;
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+ }
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+
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+ if (r != -EEXIST) {
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+ log_error("error changing net interface name %s to %s: %s",
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+ interim, name, strerror(-r));
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+ break;
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+ }
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+ }
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return r;
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}
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