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- #!/bin/bash
- # Copyright (c) International Business Machines Corp., 2008
- # Author: Matt Helsley <matthltc@us.ibm.com>
- #
- # This library is free software; you can redistribute it and/or
- # modify it under the terms of the GNU Lesser General Public
- # License as published by the Free Software Foundation; either
- # version 2.1 of the License, or (at your option) any later version.
- #
- # This library is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- # Lesser General Public License for more details.
- #
- # You should have received a copy of the GNU Lesser General Public
- # License along with this library; if not, write to the Free Software
- # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- #
- #
- # This bash script tests freezer code by starting a long sleep process.
- # The sleep process is frozen. We then move the sleep process to a THAWED
- # cgroup. We expect moving the sleep process to fail. [While developing
- # the cgroup freezer it was undecided whether moving would fail or it would
- # cause the frozen task to thaw. If it causes the task to thaw then replace the
- # previous sentence with "We expect the moving task to thaw.". This note can
- # be removed once the cgroup freezer is in mainline. ]
- #
- . "${CGROUPS_TESTROOT}/libcgroup_freezer"
- SETS_DEFAULTS="${TCID=freeze_move_thaw.sh} ${TST_COUNT=1} ${TST_TOTAL=1}"
- declare -r TCID
- declare -r TST_COUNT
- declare -r TST_TOTAL
- export TCID TST_COUNT TST_TOTAL
- running_cgroup_test
- mount_freezer && {
- make_sample_cgroup_named "child2" && {
- make_sample_cgroup && {
- start_sample_proc && {
- while /bin/true ; do
- trap 'break' ERR
- assert_cgroup_freezer_state "THAWED" \
- "ERROR: cgroup freezer started in non-THAWED state"
- add_sample_proc_to_cgroup
- # FREEZE
- issue_freeze_cmd
- wait_until_frozen
- assert_sample_proc_is_frozen
- # MOVE
- "${CG_FILE_WRITE}" $sample_proc > "$(dirname $(pwd))/child2/tasks" 2> /dev/null && {
- result=${result:-1}
- /bin/false
- } || {
- /bin/true
- }
- # IF the semantics are: the moved task is unfrozen THEN remove everthing
- # after "2> /dev/null" in the line above (don't redirect stdder and
- # don't invert the result)
- # This block of comments can be removed once the cgroup freezer has
- # been added to mainline.
- sleep 1
- assert_sample_proc_is_frozen
- assert_sample_proc_in_cgroup
- assert_sample_proc_not_in_named_cgroup "$(dirname $(pwd))/child2"
- # IF the semantics are: the moved task is unfrozen THEN replace the
- # asserts above with these and make the THAW section consistent:
- # assert_sample_proc_not_in_cgroup # it's in child2 after all
- # assert_sample_proc_in_named_cgroup "$(dirname $(pwd))/child2"
- # assert_sample_proc_not_frozen
- # This block of comments can be removed once the cgroup freezer has
- # been added to mainline.
- # THAW
- issue_thaw_cmd
- wait_until_thawed
- assert_sample_proc_not_frozen
- assert_sample_proc_in_cgroup
- assert_sample_proc_not_in_named_cgroup "$(dirname $(pwd))/child2"
- # IF the semantics are: the moved task is unfrozen before adding to
- # child2 THEN
- # assert_sample_proc_not_frozen
- # assert_sample_proc_not_in_cgroup
- # assert_sample_proc_in_named_cgroup "$(dirname $(pwd))/child2"
- # This block of comments can be removed once the cgroup freezer has
- # been added to mainline.
- result=$FINISHED
- break
- done
- trap '' ERR
- cleanup_cgroup_test
- tst_resm TINFO " Cleaning up $0"
- # We may need to stop the sample process because we could have failed before the
- # rest of the test caused it to stop.
- kill_sample_proc ; }
- rm_sample_cgroup ; }
- rm_sample_cgroup_named "child2" ; }
- umount_freezer ; }
- # Failsafe cleanup
- cleanup_freezer || /bin/true
- exit $result
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