1 #!/bin/bash 2 3 # Copyright (c) International Business Machines Corp., 2008 4 # Author: Matt Helsley <matthltc (at] 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 move the sleep process to a THAWED 24 # cgroup. We expect moving the sleep process to fail. [While developing 25 # the cgroup freezer it was undecided whether moving would fail or it would 26 # cause the frozen task to thaw. If it causes the task to thaw then replace the 27 # previous sentence with "We expect the moving task to thaw.". This note can 28 # be removed once the cgroup freezer is in mainline. ] 29 # 30 31 . "${CGROUPS_TESTROOT}/libcgroup_freezer" 32 SETS_DEFAULTS="${TCID=freeze_move_thaw.sh} ${TST_COUNT=1} ${TST_TOTAL=1}" 33 declare -r TCID 34 declare -r TST_COUNT 35 declare -r TST_TOTAL 36 export TCID TST_COUNT TST_TOTAL 37 38 running_cgroup_test 39 mount_freezer && { 40 make_sample_cgroup_named "child2" && { 41 make_sample_cgroup && { 42 start_sample_proc && { 43 44 while /bin/true ; do 45 trap 'break' ERR 46 assert_cgroup_freezer_state "THAWED" \ 47 "ERROR: cgroup freezer started in non-THAWED state" 48 add_sample_proc_to_cgroup 49 50 # FREEZE 51 issue_freeze_cmd 52 wait_until_frozen 53 assert_sample_proc_is_frozen 54 55 # MOVE 56 "${CG_FILE_WRITE}" $sample_proc > "$(dirname $(pwd))/child2/tasks" 2> /dev/null && { 57 result=${result:-1} 58 /bin/false 59 } || { 60 /bin/true 61 } 62 63 # IF the semantics are: the moved task is unfrozen THEN remove everthing 64 # after "2> /dev/null" in the line above (don't redirect stdder and 65 # don't invert the result) 66 # This block of comments can be removed once the cgroup freezer has 67 # been added to mainline. 68 69 sleep 1 70 71 assert_sample_proc_is_frozen 72 assert_sample_proc_in_cgroup 73 assert_sample_proc_not_in_named_cgroup "$(dirname $(pwd))/child2" 74 # IF the semantics are: the moved task is unfrozen THEN replace the 75 # asserts above with these and make the THAW section consistent: 76 # assert_sample_proc_not_in_cgroup # it's in child2 after all 77 # assert_sample_proc_in_named_cgroup "$(dirname $(pwd))/child2" 78 # assert_sample_proc_not_frozen 79 # This block of comments can be removed once the cgroup freezer has 80 # been added to mainline. 81 82 # THAW 83 issue_thaw_cmd 84 wait_until_thawed 85 assert_sample_proc_not_frozen 86 assert_sample_proc_in_cgroup 87 assert_sample_proc_not_in_named_cgroup "$(dirname $(pwd))/child2" 88 # IF the semantics are: the moved task is unfrozen before adding to 89 # child2 THEN 90 # assert_sample_proc_not_frozen 91 # assert_sample_proc_not_in_cgroup 92 # assert_sample_proc_in_named_cgroup "$(dirname $(pwd))/child2" 93 # This block of comments can be removed once the cgroup freezer has 94 # been added to mainline. 95 result=$FINISHED 96 break 97 done 98 trap '' ERR 99 cleanup_cgroup_test 100 tst_resm TINFO " Cleaning up $0" 101 102 # We may need to stop the sample process because we could have failed before the 103 # rest of the test caused it to stop. 104 kill_sample_proc ; } 105 rm_sample_cgroup ; } 106 rm_sample_cgroup_named "child2" ; } 107 umount_freezer ; } 108 109 # Failsafe cleanup 110 cleanup_freezer || /bin/true 111 112 exit $result 113 114
