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-rwxr-xr-xtest/units/TEST-38-FREEZER.sh363
1 files changed, 363 insertions, 0 deletions
diff --git a/test/units/TEST-38-FREEZER.sh b/test/units/TEST-38-FREEZER.sh
new file mode 100755
index 0000000..0759784
--- /dev/null
+++ b/test/units/TEST-38-FREEZER.sh
@@ -0,0 +1,363 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# shellcheck disable=SC2317
+set -eux
+set -o pipefail
+
+# shellcheck source=test/units/test-control.sh
+. "$(dirname "$0")"/test-control.sh
+
+systemd-analyze log-level debug
+
+unit=TEST-38-FREEZER-sleep.service
+
+start_test_service() {
+ systemctl daemon-reload
+ systemctl start "${unit}"
+}
+
+dbus_freeze() {
+ local name object_path suffix
+
+ suffix="${1##*.}"
+ name="${1%".$suffix"}"
+ object_path="/org/freedesktop/systemd1/unit/${name//-/_2d}_2e${suffix}"
+
+ busctl call \
+ org.freedesktop.systemd1 \
+ "${object_path}" \
+ org.freedesktop.systemd1.Unit \
+ Freeze
+}
+
+dbus_thaw() {
+ local name object_path suffix
+
+ suffix="${1##*.}"
+ name="${1%".$suffix"}"
+ object_path="/org/freedesktop/systemd1/unit/${name//-/_2d}_2e${suffix}"
+
+ busctl call \
+ org.freedesktop.systemd1 \
+ "${object_path}" \
+ org.freedesktop.systemd1.Unit \
+ Thaw
+}
+
+dbus_freeze_unit() {
+ busctl call \
+ org.freedesktop.systemd1 \
+ /org/freedesktop/systemd1 \
+ org.freedesktop.systemd1.Manager \
+ FreezeUnit \
+ s \
+ "$1"
+}
+
+dbus_thaw_unit() {
+ busctl call \
+ org.freedesktop.systemd1 \
+ /org/freedesktop/systemd1 \
+ org.freedesktop.systemd1.Manager \
+ ThawUnit \
+ s \
+ "$1"
+}
+
+dbus_can_freeze() {
+ local name object_path suffix
+
+ suffix="${1##*.}"
+ name="${1%".$suffix"}"
+ object_path="/org/freedesktop/systemd1/unit/${name//-/_2d}_2e${suffix}"
+
+ busctl get-property \
+ org.freedesktop.systemd1 \
+ "${object_path}" \
+ org.freedesktop.systemd1.Unit \
+ CanFreeze
+}
+
+check_freezer_state() {
+ local name object_path suffix
+
+ suffix="${1##*.}"
+ name="${1%".$suffix"}"
+ object_path="/org/freedesktop/systemd1/unit/${name//-/_2d}_2e${suffix}"
+
+ for _ in {0..10}; do
+ state=$(busctl get-property \
+ org.freedesktop.systemd1 \
+ "${object_path}" \
+ org.freedesktop.systemd1.Unit \
+ FreezerState | cut -d " " -f2 | tr -d '"')
+
+ # Ignore the intermediate freezing & thawing states in case we check
+ # the unit state too quickly
+ [[ "$state" =~ ^(freezing|thawing) ]] || break
+ sleep .5
+ done
+
+ [ "$state" = "$2" ] || {
+ echo "error: unexpected freezer state, expected: $2, actual: $state" >&2
+ exit 1
+ }
+}
+
+check_cgroup_state() {
+ # foo.unit -> /system.slice/foo.unit/
+ # foo.slice/ -> /foo.slice/./
+ # foo.slice/foo.unit -> /foo.slice/foo.unit/
+ local slice unit
+ unit="${1##*/}"
+ slice="${1%"$unit"}"
+ slice="${slice%/}"
+ grep -q "frozen $2" /sys/fs/cgroup/"${slice:-system.slice}"/"${unit:-.}"/cgroup.events
+}
+
+testcase_dbus_api() {
+ echo "Test that DBus API works:"
+ echo -n " - Freeze(): "
+ dbus_freeze "${unit}"
+ check_freezer_state "${unit}" "frozen"
+ check_cgroup_state "$unit" 1
+ echo "[ OK ]"
+
+ echo -n " - Thaw(): "
+ dbus_thaw "${unit}"
+ check_freezer_state "${unit}" "running"
+ check_cgroup_state "$unit" 0
+ echo "[ OK ]"
+
+ echo -n " - FreezeUnit(): "
+ dbus_freeze_unit "${unit}"
+ check_freezer_state "${unit}" "frozen"
+ check_cgroup_state "$unit" 1
+ echo "[ OK ]"
+
+ echo -n " - ThawUnit(): "
+ dbus_thaw_unit "${unit}"
+ check_freezer_state "${unit}" "running"
+ check_cgroup_state "$unit" 0
+ echo "[ OK ]"
+
+ echo -n " - CanFreeze(): "
+ output=$(dbus_can_freeze "${unit}")
+ [ "$output" = "b true" ]
+ echo "[ OK ]"
+
+ echo
+}
+
+testcase_systemctl() {
+ echo "Test that systemctl freeze/thaw verbs:"
+
+ systemctl start "$unit"
+
+ echo -n " - freeze: "
+ systemctl freeze "$unit"
+ check_freezer_state "${unit}" "frozen"
+ check_cgroup_state "$unit" 1
+ # Freezing already frozen unit should be NOP and return quickly
+ timeout 3s systemctl freeze "$unit"
+ echo "[ OK ]"
+
+ echo -n " - thaw: "
+ systemctl thaw "$unit"
+ check_freezer_state "${unit}" "running"
+ check_cgroup_state "$unit" 0
+ # Likewise thawing already running unit shouldn't block
+ timeout 3s systemctl thaw "$unit"
+ echo "[ OK ]"
+
+ systemctl stop "$unit"
+
+ echo
+}
+
+testcase_systemctl_show() {
+ echo "Test systemctl show integration:"
+
+ systemctl start "$unit"
+
+ echo -n " - FreezerState property: "
+ state=$(systemctl show -p FreezerState --value "$unit")
+ [ "$state" = "running" ]
+ systemctl freeze "$unit"
+ state=$(systemctl show -p FreezerState --value "$unit")
+ [ "$state" = "frozen" ]
+ systemctl thaw "$unit"
+ echo "[ OK ]"
+
+ echo -n " - CanFreeze property: "
+ state=$(systemctl show -p CanFreeze --value "$unit")
+ [ "$state" = "yes" ]
+ echo "[ OK ]"
+
+ systemctl stop "$unit"
+ echo
+}
+
+testcase_recursive() {
+ local slice="bar.slice"
+ local unit="baz.service"
+
+ systemd-run --unit "$unit" --slice "$slice" sleep 3600 >/dev/null 2>&1
+
+ echo "Test recursive freezing:"
+
+ echo -n " - freeze/thaw parent: "
+ systemctl freeze "$slice"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen-by-parent"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl thaw "$slice"
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "running"
+ check_cgroup_state "$slice/" 0
+ check_cgroup_state "$slice/$unit" 0
+ echo "[ OK ]"
+
+ echo -n " - child freeze/thaw during frozen parent: "
+ systemctl freeze "$slice"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen-by-parent"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl freeze "$unit"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl thaw "$unit"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen-by-parent"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl thaw "$slice"
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "running"
+ check_cgroup_state "$slice/" 0
+ check_cgroup_state "$slice/$unit" 0
+ echo "[ OK ]"
+
+ echo -n " - pre-frozen child not thawed by parent: "
+ systemctl freeze "$unit"
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "frozen"
+ check_cgroup_state "$slice/" 0
+ check_cgroup_state "$slice/$unit" 1
+ systemctl freeze "$slice"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl thaw "$slice"
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "frozen"
+ check_cgroup_state "$slice/" 0
+ check_cgroup_state "$slice/$unit" 1
+ echo "[ OK ]"
+
+ echo -n " - pre-frozen child demoted and thawed by parent: "
+ systemctl freeze "$slice"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl thaw "$unit"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen-by-parent"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl thaw "$slice"
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "running"
+ check_cgroup_state "$slice/" 0
+ check_cgroup_state "$slice/$unit" 0
+ echo "[ OK ]"
+
+ echo -n " - child promoted and not thawed by parent: "
+ systemctl freeze "$slice"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen-by-parent"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl freeze "$unit"
+ check_freezer_state "$slice" "frozen"
+ check_freezer_state "$unit" "frozen"
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ systemctl thaw "$slice"
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "frozen"
+ check_cgroup_state "$slice/" 0
+ check_cgroup_state "$slice/$unit" 1
+ echo "[ OK ]"
+
+ echo -n " - can't stop a frozen unit: "
+ (! systemctl -q stop "$unit" )
+ echo "[ OK ]"
+ systemctl thaw "$unit"
+
+ systemctl stop "$unit"
+ systemctl stop "$slice"
+
+ echo
+}
+
+testcase_preserve_state() {
+ local slice="bar.slice"
+ local unit="baz.service"
+
+ systemd-run --unit "$unit" --slice "$slice" sleep 3600 >/dev/null 2>&1
+
+ echo "Test that freezer state is preserved when recursive freezing is initiated from outside (e.g. by manager up the tree):"
+
+ echo -n " - freeze from outside: "
+ echo 1 >/sys/fs/cgroup/"$slice"/cgroup.freeze
+ # Give kernel some time to freeze the slice
+ sleep 1
+
+ # Our state should not be affected
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "running"
+
+ # However actual kernel state should be frozen
+ check_cgroup_state "$slice/" 1
+ check_cgroup_state "$slice/$unit" 1
+ echo "[ OK ]"
+
+ echo -n " - thaw from outside: "
+ echo 0 >/sys/fs/cgroup/"$slice"/cgroup.freeze
+ sleep 1
+
+ check_freezer_state "$unit" "running"
+ check_freezer_state "$slice" "running"
+ check_cgroup_state "$slice/" 0
+ check_cgroup_state "$slice/$unit" 0
+ echo "[ OK ]"
+
+ echo -n " - thaw from outside while inner service is frozen: "
+ systemctl freeze "$unit"
+ check_freezer_state "$unit" "frozen"
+ echo 1 >/sys/fs/cgroup/"$slice"/cgroup.freeze
+ echo 0 >/sys/fs/cgroup/"$slice"/cgroup.freeze
+ check_freezer_state "$slice" "running"
+ check_freezer_state "$unit" "frozen"
+ echo "[ OK ]"
+
+ systemctl thaw "$unit"
+ systemctl stop "$unit"
+ systemctl stop "$slice"
+
+ echo
+}
+
+if [[ -e /sys/fs/cgroup/system.slice/cgroup.freeze ]]; then
+ start_test_service
+ run_testcases
+fi
+
+touch /testok
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 02:10:00 +0000