#!/bin/sh
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################################################################################
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## ##
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## Copyright (c) 2015 SUSE ##
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## ##
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## This program is free software; you can redistribute it and#or modify ##
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## it under the terms of the GNU General Public License as published by ##
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## the Free Software Foundation; either version 2 of the License, or ##
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## (at your option) any later version. ##
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## ##
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## This program is distributed in the hope that it will be useful, but ##
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## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ##
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ##
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## for more details. ##
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## ##
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## You should have received a copy of the GNU General Public License ##
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## along with this program; if not, write to the Free Software ##
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## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 ##
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## USA ##
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## ##
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## Author: Cedric Hnyda <chnyda@suse.com> ##
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## ##
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################################################################################
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# Usage
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# ./pids.sh caseno max
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#
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TST_CLEANUP=cleanup
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TST_SETUP=setup
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TST_TESTFUNC=do_test
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TST_POS_ARGS=3
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TST_USAGE=usage
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TST_NEEDS_ROOT=1
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TST_NEEDS_CMDS="killall"
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. tst_test.sh
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caseno=$1
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max=$2
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subcgroup_num=$3
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mounted=1
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usage()
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{
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cat << EOF
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usage: $0 caseno max_processes
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caseno - testcase number from interval 1-9
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max_processes - maximal number of processes to attach
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(not applicable to testcase 5)
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subcgroup_num - number of subgroups created in group
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(only applicable to testcase 7)
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OPTIONS
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EOF
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}
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cleanup()
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{
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killall -9 pids_task2 >/dev/null 2>&1
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tst_res TINFO "removing created directories"
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rmdir $testpath
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if [ "$mounted" -ne "1" ]; then
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tst_res TINFO "Umounting pids"
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umount $mount_point
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rmdir $mount_point
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fi
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}
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setup()
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{
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exist=`grep -w pids /proc/cgroups | cut -f1`;
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if [ "$exist" = "" ]; then
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tst_brk TCONF NULL "pids not supported"
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fi
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mount_point=`grep -w pids /proc/mounts | cut -f 2 | cut -d " " -f2`
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if [ "$mount_point" = "" ]; then
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mounted=0
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mount_point=/dev/cgroup
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fi
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testpath=$mount_point/ltp_pids_$caseno
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if [ "$mounted" -eq "0" ]; then
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ROD mkdir -p $mount_point
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ROD mount -t cgroup -o pids none $mount_point
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fi
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ROD mkdir -p $testpath
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}
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start_pids_tasks2()
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{
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start_pids_tasks2_path $testpath $1
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}
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start_pids_tasks2_path()
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{
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path=$1
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nb=$2
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for i in `seq 1 $nb`; do
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pids_task2 &
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echo $! > $path/tasks
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done
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if [ $(cat "$path/tasks" | wc -l) -ne $nb ]; then
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tst_brk TBROK "failed to attach process"
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fi
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}
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stop_pids_tasks()
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{
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stop_pids_tasks_path $testpath
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}
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stop_pids_tasks_path()
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{
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local i
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path=$1
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for i in `cat $path/tasks`; do
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ROD kill -9 $i
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wait $i
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done
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}
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case1()
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{
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start_pids_tasks2 $max
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# should return 0 because there is no limit
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pids_task1 "$testpath/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TFAIL "fork failed unexpectedly"
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elif [ "$ret" -eq "0" ]; then
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tst_res TPASS "fork didn't fail"
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else
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tst_res TBROK "pids_task1 failed"
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fi
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stop_pids_tasks
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}
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case2()
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{
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tmp=$((max - 1))
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tst_res TINFO "limit the number of pid to $max"
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ROD echo $max \> $testpath/pids.max
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start_pids_tasks2 $tmp
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# should return 2 because the limit of pids is reached
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pids_task1 "$testpath/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TPASS "fork failed as expected"
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elif [ "$ret" -eq "0" ]; then
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tst_res TFAIL "fork didn't fail despite the limit"
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else
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tst_res TBROK "pids_task1 failed"
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fi
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stop_pids_tasks
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}
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case3()
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{
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lim=$((max + 2))
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tst_res TINFO "limit the number of avalaible pid to $lim"
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ROD echo $lim \> $testpath/pids.max
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start_pids_tasks2 $max
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pids_task1 "$testpath/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TFAIL "fork failed unexpectedly"
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elif [ "$ret" -eq "0" ]; then
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tst_res TPASS "fork worked as expected"
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else
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tst_res TBROK "pids_task1 failed"
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fi
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stop_pids_tasks
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}
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case4()
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{
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tst_res TINFO "limit the number of avalaible pid to 0"
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ROD echo 0 \> $testpath/pids.max
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start_pids_tasks2 $max
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tst_res TPASS "all process were attached"
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stop_pids_tasks
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}
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case5()
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{
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tst_res TINFO "try to limit the number of avalaible pid to -1"
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echo -1 > $testpath/pids.max
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if [ "$?" -eq "0" ]; then
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tst_res TFAIL "managed to set the limit to -1"
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else
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tst_res TPASS "didn't manage to set the limit to -1"
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fi
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}
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case6()
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{
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tst_res TINFO "set a limit that is smaller than current number of pids"
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start_pids_tasks2 $max
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lim=$((max - 1))
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ROD echo $lim \> $testpath/pids.max
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pids_task1 "$testpath/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TPASS "fork failed as expected"
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elif [ "$ret" -eq "0" ]; then
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tst_res TFAIL "fork didn't fail despite the limit"
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else
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tst_res TBROK "pids_task1 failed"
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fi
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stop_pids_tasks
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}
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case7()
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{
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tst_res TINFO "the number of all child cgroup tasks larger than its parent limit"
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lim=$((max / subcgroup_num))
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if [ "$((lim * subcgroup_num))" -ne "$max" ]; then
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tst_res TWARN "input max value must be a multiplier of $subcgroup_num"
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return
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fi
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ROD echo $max \> $testpath/pids.max
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for i in `seq 1 $subcgroup_num`; do
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mkdir $testpath/child$i
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start_pids_tasks2_path $testpath/child$i $lim
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done
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pids_task1 "$testpath/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TPASS "parent cgroup fork failed as expected"
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elif [ "$ret" -eq "0" ]; then
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tst_res TFAIL "parent cgroup fork didn't fail despite the limit"
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else
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tst_res TBROK "parent cgroup pids_task1 failed"
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fi
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for i in `seq 1 $subcgroup_num`; do
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pids_task1 "$testpath/child$i/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TPASS "child$i cgroup fork failed as expected"
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elif [ "$ret" -eq "0" ]; then
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tst_res TFAIL "child$i cgroup fork didn't fail despite the limit"
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else
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tst_res TBROK "child$i cgroup pids_task1 failed"
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fi
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done
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for i in `seq 1 $subcgroup_num`; do
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stop_pids_tasks_path $testpath/child$i
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rmdir $testpath/child$i
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done
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stop_pids_tasks
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}
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case8()
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{
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tst_res TINFO "set child cgroup limit smaller than its parent limit"
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ROD echo $max \> $testpath/pids.max
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mkdir $testpath/child
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lim=$((max - 1))
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ROD echo $lim \> $testpath/child/pids.max
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tmp=$((max - 2))
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start_pids_tasks2_path $testpath/child $tmp
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pids_task1 "$testpath/child/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TPASS "fork failed as expected"
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elif [ "$ret" -eq "0" ]; then
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tst_res TFAIL "fork didn't fail despite the limit"
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else
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tst_res TBROK "pids_task1 failed"
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fi
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stop_pids_tasks_path $testpath/child
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rmdir $testpath/child
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}
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case9()
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{
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tst_res TINFO "migrate cgroup"
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lim=$((max - 1))
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for i in 1 2; do
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mkdir $testpath/child$i
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ROD echo $max \> $testpath/child$i/pids.max
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start_pids_tasks2_path $testpath/child$i $lim
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done
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pid=`head -n 1 $testpath/child1/tasks`;
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ROD echo $pid \> $testpath/child2/tasks
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if grep -q "$pid" "$testpath/child2/tasks"; then
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tst_res TPASS "migrate pid $pid from cgroup1 to cgroup2 as expected"
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else
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tst_res TPASS "migrate pid $pid from cgroup1 to cgroup2 failed"
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fi
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if [ $(cat "$testpath/child1/pids.current") -eq $((lim - 1)) ]; then
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tst_res TPASS "migrate child1 cgroup as expected"
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else
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tst_res TFAIL "migrate child1 cgroup failed"
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fi
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if [ $(cat "$testpath/child2/pids.current") -eq $((lim + 1)) ]; then
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tst_res TPASS "migrate child2 cgroup as expected"
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else
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tst_res TFAIL "migrate child2 cgroup failed"
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fi
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pids_task1 "$testpath/child1/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TFAIL "child1 fork failed unexpectedly"
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elif [ "$ret" -eq "0" ]; then
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tst_res TPASS "child1 fork worked as expected"
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else
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tst_res TBROK "child1 pids_task1 failed"
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fi
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pids_task1 "$testpath/child2/tasks"
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ret=$?
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if [ "$ret" -eq "2" ]; then
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tst_res TPASS "child2 fork failed as expected"
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elif [ "$ret" -eq "0" ]; then
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tst_res TFAIL "child2 fork didn't fail despite the limit"
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else
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tst_res TBROK "child2 pids_task1 failed"
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fi
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for i in 1 2; do
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stop_pids_tasks_path $testpath/child$i
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rmdir $testpath/child$i
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done
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stop_pids_tasks
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}
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do_test()
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{
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tst_res TINFO "Running testcase $caseno with $max processes"
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case$caseno
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}
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tst_run
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