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udev: do not try to rename interface if it is already up

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See dev_change_name() in kernel's net/core/dev.c.

Fixes #21105.
This commit is contained in:
Yu Watanabe
2021-10-24 20:43:34 +09:00
committed by Luca Boccassi
parent f595b2e9b4
commit 6681eb021a
1 changed files with 11 additions and 0 deletions
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11
src/udev/udev-event.c
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@@ -827,6 +827,7 @@ int udev_event_spawn(UdevEvent *event,
static int rename_netif(UdevEvent *event) {
sd_device *dev = event->dev;
const char *oldname;
unsigned flags;
int ifindex, r;
if (!event->name)
@@ -854,6 +855,16 @@ static int rename_netif(UdevEvent *event) {
return 0;
}
r = rtnl_get_link_info(&event->rtnl, ifindex, NULL, &flags);
if (r < 0)
return log_device_warning_errno(dev, r, "Failed to get link flags: %m");
if (FLAGS_SET(flags, IFF_UP)) {
log_device_info(dev, "Network interface '%s' is already up, refusing to rename to '%s'.",
oldname, event->name);
return 0;
}
/* Set ID_RENAMING boolean property here, and drop it in the corresponding move uevent later. */
r = device_add_property(dev, "ID_RENAMING", "1");
if (r < 0)