3 Commits

Author	SHA1	Message	Date
Zbigniew Jędrzejewski-Szmek	22d3cfe54c	tests: add spdx license header to test unit/link/network/conf files ... Those are all consumed by our parser, so they all support comments. I was considering whether they should have a license header at all, but in the end I decided to add it because those files are often created by copying parts of real unit files. And if the real ones have a license, then those might as well. It's easier to add it than to make an exception.	2021-10-18 09:04:45 +02:00
Alan Jenkins	69338c3dfb	namespace: don't try to remount superblocks ... We can't remount the underlying superblocks, if we are inside a user namespace and running Linux <= 4.17. We can only change the per-mount flags (MS_REMOUNT | MS_BIND). This type of mount() call can only change the per-mount flags, so we don't have to worry about passing the right string options now. Fixes #9914 ("Since 1beab8b was merged, systemd has been failing to start systemd-resolved inside unprivileged containers" ... "Failed to re-mount '/run/systemd/unit-root/dev' read-only: Operation not permitted"). > It's basically my fault :-). I pointed out we could remount read-only > without MS_BIND when reviewing the PR that added TemporaryFilesystem=, > and poettering suggested to change PrivateDevices= at the same time. > I think it's safe to change back, and I don't expect anyone will notice > a difference in behaviour. > > It just surprised me to realize that > `TemporaryFilesystem=/tmp:size=10M,ro,nosuid` would not apply `ro` to the > superblock (underlying filesystem), like mount -osize=10M,ro,nosuid does. > Maybe a comment could note the kernel version (v4.18), that lets you > remount without MS_BIND inside a user namespace. This makes the code longer and I guess this function is still ugly, sorry. One obstacle to cleaning it up is the interaction between `PrivateDevices=yes` and `ReadOnlyPaths=/dev`. I've added a test for the existing behaviour, which I think is now the correct behaviour.	2018-08-30 11:17:16 +01:00
Djalal Harouni	f78b36f016	test: add tests for simple ReadOnlyPaths= case	2016-09-27 09:24:43 +02:00