test/TEST-19-DELEGATE/testsuite.sh

#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
set -ex
set -o pipefail

if grep -q cgroup2 /proc/filesystems ; then
        systemd-run --wait --unit=test0.service -p "DynamicUser=1" -p "Delegate=" \
                    test -w /sys/fs/cgroup/system.slice/test0.service/ -a \
                    -w /sys/fs/cgroup/system.slice/test0.service/cgroup.procs -a \
                    -w /sys/fs/cgroup/system.slice/test0.service/cgroup.subtree_control

        systemd-run --wait --unit=test1.service -p "DynamicUser=1" -p "Delegate=memory pids" \
                    grep -q memory /sys/fs/cgroup/system.slice/test1.service/cgroup.controllers

        systemd-run --wait --unit=test2.service -p "DynamicUser=1" -p "Delegate=memory pids" \
                    grep -q pids /sys/fs/cgroup/system.slice/test2.service/cgroup.controllers

        # "io" is not among the controllers enabled by default for all units, verify that
        grep -qv io /sys/fs/cgroup/system.slice/cgroup.controllers

        # Run a service with "io" enabled, and verify it works
        systemd-run --wait --unit=test3.service -p "IOAccounting=yes" -p "Slice=system-foo-bar-baz.slice"  \
                    grep -q io /sys/fs/cgroup/system.slice/system-foo.slice/system-foo-bar.slice/system-foo-bar-baz.slice/test3.service/cgroup.controllers

        # We want to check if "io" is removed again from the controllers
        # list. However, PID 1 (rightfully) does this asynchronously. In order
        # to force synchronization on this, let's start a short-lived service
        # which requires PID 1 to refresh the cgroup tree, so that we can
        # verify that this all works.
        systemd-run --wait --unit=test4.service true

        # And now check again, "io" should have vanished
        grep -qv io /sys/fs/cgroup/system.slice/cgroup.controllers
else
        echo "Skipping TEST-19-DELEGATE, as the kernel doesn't actually support cgroup v2" >&2
fi

echo OK > /testok

exit 0