Merging upstream version 256.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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