1#!/bin/bash
2
3# Copyright (c) International Business Machines  Corp., 2008
4# Author: Matt Helsley <matthltc@us.ibm.com>
5#
6# This library is free software; you can redistribute it and/or
7# modify it under the terms of the GNU Lesser General Public
8# License as published by the Free Software Foundation; either
9# version 2.1 of the License, or (at your option) any later version.
10#
11# This library is distributed in the hope that it will be useful,
12# but WITHOUT ANY WARRANTY; without even the implied warranty of
13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14# Lesser General Public License for more details.
15#
16# You should have received a copy of the GNU Lesser General Public
17# License along with this library; if not, write to the Free Software
18# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19#
20
21#
22# This bash script tests freezer code by starting a long sleep process.
23# The sleep process is frozen. We then wait until the sleep process should
24# have exited. Then we unfreeze the sleep process. We expect the
25# sleep process to wakeup almost immediately after the cgroup is thawed,
26# recognize that its expiration time has long since passed, and exit before
27# we get a chance to "see" it again.
28#
29
30. "${CGROUPS_TESTROOT}/libcgroup_freezer"
31SETS_DEFAULTS="${TCID=freeze_sleep_thaw.sh} ${TST_COUNT=1} ${TST_TOTAL=1}"
32declare -r TCID
33declare -r TST_COUNT
34declare -r TST_TOTAL
35export TCID TST_COUNT TST_TOTAL
36
37running_cgroup_test
38mount_freezer && {
39make_sample_cgroup && {
40start_sample_proc && {
41
42while /bin/true ; do
43	trap 'break' ERR
44	add_sample_proc_to_cgroup
45	assert_cgroup_freezer_state "THAWED" \
46			"ERROR: cgroup freezer started in non-THAWED state"
47	issue_freeze_cmd
48	wait_until_frozen
49	assert_sample_proc_is_frozen
50
51	echo -n "INFO: Waiting until sleep command should have finished ($sample_proc) ... "
52	/bin/sleep $(($sample_sleep * 2))
53	echo "done."
54
55	# We expect the task to remain until it is thawed even though its
56	# sleep period has long since expired.
57	assert_sample_proc_is_frozen
58
59	issue_thaw_cmd
60	wait_until_thawed
61
62	# We do NOT call
63	#      assert_task_not_frozen $sample_proc
64	# here because we've slept past the point in time when the task should've
65	# exited.
66	assert_sample_proc_does_not_exist
67
68	sample_proc=""
69	result=$FINISHED
70	break
71done
72trap '' ERR
73cleanup_cgroup_test
74tst_resm TINFO " Cleaning up $0"
75
76# We may need to stop the sample process because we could have failed before the
77# rest of the test caused it to stop.
78kill_sample_proc ; }
79rm_sample_cgroup ; }
80umount_freezer ; }
81
82# Failsafe cleanup
83cleanup_freezer || /bin/true
84
85exit $result
86