1 files changed, 39 insertions, 0 deletions
diff --git a/test/units/testsuite-19.sh b/test/units/testsuite-19.sh
new file mode 100755
index 0000000..57831c2
--- /dev/null
+++ b/test/units/testsuite-19.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+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