Previously, we only store device IDs in /run/udev/links, and when
creating/removing device node symlink, we create sd_device object
corresponds to the IDs and read device node and priority from the
object. That requires parsing uevent and udev database files.
This makes link_find_prioritized() get the most prioritzed device node
without parsing the files.
As we usually do, remove old unix socket before bind.
Note that systemd-udevd-control.socket has `RemoveOnStop=yes`.
So, it is not necessary to be removed when the service exits.
Replaces #20584 and #20588.
Otherwise, 99-default.link may introduce something like the
following warnings:
----
Aug 26 03:23:59 systemd-udevd[519]: wlan0: Could not set coalesce settings, ignoring: Operation not supported
Aug 26 03:24:00 systemd-udevd[547]: wlp59s0: Could not set coalesce settings, ignoring: Operation not supported
----
Follow-up for 6c35ea5ef0.
According to Coverity, 194 ouf of 227 times we check for snprintf return code.
Voidify the rest.
CID#1461512
CID#1461513
CID#1461514
CID#1461515
CID#1461516
CID#1461518
CID#1461519
CID#1461520
CID#1461522
Follow-up for 406041b7de.
Also, this makes
- the settings accept an empty string,
- if the specified value is too large, also use the advertised maximum
value.
- mention the range of the value in the man page.
We would update 'found' using bit operations, but studiously ignore the actual
value and treat it as boolean. So just use a boolean variable instead. Because
there is a double loop, we would break the inner loop, but repeat the outer
loop, even though the boolean was already set. Add '&& !found' in the loop
conditions to break iteration immediately.
In general we almost never hit those asserts in production code, so users see
them very rarely, if ever. But either way, we just need something that users
can pass to the developers.
We have quite a few of those asserts, and some have fairly nice messages, but
many are like "WTF?" or "???" or "unexpected something". The error that is
printed includes the file location, and function name. In almost all functions
there's at most one assert, so the function name alone is enough to identify
the failure for a developer. So we don't get much extra from the message, and
we might just as well drop them.
Dropping them makes our code a tiny bit smaller, and most importantly, improves
development experience by making it easy to insert such an assert in the code
without thinking how to phrase the argument.
From #20300:
> commit 70f32a260b
> Author: Yu Watanabe <watanabe.yu+github@gmail.com>
> Date: Sun May 23 16:59:40 2021 +0900
> udev/net: do not manage loopback interfaces
> There are nothing we can configure in udevd for loopback interfaces;
> no ethertool configs can be applied, MAC address, interface name should
> introduced a regression for 'udevadm test-builtin net_setup_link /sys/class/net/lo/'.
> Prior to this commit this command would exit with 0 whereas after this commit
> it exists with 1. This causes cloud-init on Archlinux to fail as this command
> is run by it and likely also netplan to have networkd rescan and re-apply a
> bunch of things on NICs.
I think it's reasonable to keep returning 0 here: we are intentatinally doing
nothing for the device, and that is not an error, but a (noop) success.
Fixes#20300.
Since 08fe0a5386 when dissecting a disk
image we'll automatically pick the "newest" root fs if multiple exist,
by comparing GPT partition labels. This works in systemd-nspawn,
systemd-dissect, systemd-tmpfiles --image, … and so on. It also works
already in systemd-gpt-auto-generator. However, there was one missing
place: in the logic that automatically finds a root fs in case no root=
was specified on the kernel logic at all. This logic doesn't use the
dissection logic, but a much simpler one.
Let's fill the gap, and implement it there too.
Yu Watanabe
Luca Boccassi
Daan De Meyer
Zbigniew Jędrzejewski-Szmek
Lennart Poettering