64 lines
2.6 KiB
Diff
64 lines
2.6 KiB
Diff
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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 | 40 ++++++++++++++++++++++++++++++++++++----
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1 file changed, 36 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 2014-03-04 11:19:50.583710411 +0100
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@@ -765,10 +765,42 @@ 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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- 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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+ if (r < 0) {
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+ char interim[IFNAMSIZ], *ptr = &interim[0];
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+ int loop = 90;
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+
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+ /* keep trying if the destination interface name already exists */
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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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+ oldname, name, strerror(-r));
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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, name, strerror(-r));
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+ return r;
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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", oldname, interim);
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+ do {
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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", oldname, name);
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+ return r;
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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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+ oldname, name, strerror(-r));
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+ return r;
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+ }
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+ } while (loop-- > 0);
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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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