#! /bin/bash
################################################################################
## ##
## Copyright (c) 2009 FUJITSU LIMITED ##
## ##
## This program is free software; you can redistribute it and#or modify ##
## it under the terms of the GNU General Public License as published by ##
## the Free Software Foundation; either version 2 of the License, or ##
## (at your option) any later version. ##
## ##
## This program 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 General Public License ##
## for more details. ##
## ##
## You should have received a copy of the GNU General Public License ##
## along with this program; if not, write to the Free Software ##
## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ##
## ##
## Author: Li Zefan <lizf@cn.fujitsu.com> ##
## ##
################################################################################
cd $LTPROOT/testcases/bin
export TCID="cgroup_regression_test"
export TST_TOTAL=10
export TST_COUNT=1
failed=0
if tst_kvcmp -lt "2.6.29"; then
tst_brkm TCONF ignored "test must be run with kernel 2.6.29 or newer"
exit 32
fi
if [ ! -f /proc/cgroups ]; then
tst_brkm TCONF ignored "Kernel does not support for control groups; skipping testcases";
exit 32
fi
if [ "x$(id -ru)" != x0 ]; then
tst_brkm TCONF ignored "Test must be run as root"
exit 32
fi
dmesg -c > /dev/null
nr_bug=`dmesg | grep -c "kernel BUG"`
nr_null=`dmesg | grep -c "kernel NULL pointer dereference"`
nr_warning=`dmesg | grep -c "^WARNING"`
nr_lockdep=`dmesg | grep -c "possible recursive locking detected"`
# check_kernel_bug - check if some kind of kernel bug happened
check_kernel_bug()
{
new_bug=`dmesg | grep -c "kernel BUG"`
new_null=`dmesg | grep -c "kernel NULL pointer dereference"`
new_warning=`dmesg | grep -c "^WARNING"`
new_lockdep=`dmesg | grep -c "possible recursive locking detected"`
# no kernel bug is detected
if [ $new_bug -eq $nr_bug -a $new_warning -eq $nr_warning -a \
$new_null -eq $nr_null -a $new_lockdep -eq $nr_lockdep ]; then
return 1
fi
# some kernel bug is detected
if [ $new_bug -gt $nr_bug ]; then
tst_resm TFAIL "kernel BUG was detected!"
fi
if [ $new_warning -gt $nr_warning ]; then
tst_resm TFAIL "kernel WARNING was detected!"
fi
if [ $new_null -gt $nr_null ]; then
tst_resm TFAIL "kernel NULL pointer dereference!"
fi
if [ $new_lockdep -gt $nr_lockdep ]; then
tst_resm TFAIL "kernel lockdep warning was detected!"
fi
nr_bug=$new_bug
nr_null=$new_null
nr_warning=$new_warning
nr_lockdep=$new_lockdep
echo "check_kernel_bug found something!"
dmesg
failed=1
return 0
}
#---------------------------------------------------------------------------
# Bug: There was a race when keeping forking processes and at the same
# time cat /cgroup/tasks (should be the very first time to read
# /cgroup/tasks, otherwise this bug won't be triggered)
# Kernel: 2.6.24, 2.6.25-rcX
# Links: http://lkml.org/lkml/2007/10/17/224
# http://lkml.org/lkml/2008/3/5/332
# http://lkml.org/lkml/2008/4/16/493
# Fix: commit 0e04388f0189fa1f6812a8e1cb6172136eada87e
#---------------------------------------------------------------------------
test_1()
{
./fork_processes &
sleep 1
mount -t cgroup -o none,name=foo cgroup cgroup/
if [ $? -ne 0 ]; then
tst_resm TFAIL "failed to mount cgroup filesystem"
failed=1
/bin/kill -SIGTERM $!
return
fi
cat cgroup/tasks > /dev/null
check_kernel_bug
if [ $? -eq 1 ]; then
tst_resm TPASS "no kernel bug was found"
fi
/bin/kill -SIGTERM $!
wait $!
umount cgroup/
}
#---------------------------------------------------------------------------
# Bug: a cgroup's notify_on_release flag did not inherit from its parent.
# Kernel: 2.6.24-rcX
# Links: http://lkml.org/lkml/2008/2/25/12
# Fix: commit bc231d2a048010d5e0b49ac7fddbfa822fc41109
#---------------------------------------------------------------------------
test_2()
{
mount -t cgroup -o none,name=foo cgroup cgroup/
if [ $? -ne 0 ]; then
tst_resm TFAIL "Failed to mount cgroup filesystem"
failed=1
return 1
fi
echo 0 > cgroup/notify_on_release
mkdir cgroup/0
val1=`cat cgroup/0/notify_on_release`
echo 1 > cgroup/notify_on_release
mkdir cgroup/1
val2=`cat cgroup/1/notify_on_release`
if [ $val1 -ne 0 -o $val2 -ne 1 ]; then
tst_resm TFAIL "wrong notify_on_release value"
failed=1
else
tst_resm TPASS "notify_on_release is inherited"
fi
rmdir cgroup/0 cgroup/1
umount cgroup/
return $failed
}
#---------------------------------------------------------------------------
# Bug: Accessing NULL cgrp->dentry when reading /proc/sched_debug
# Kernel: 2.6.26-2.6.28
# Links: http://lkml.org/lkml/2008/10/30/44
# http://lkml.org/lkml/2008/12/12/107
# http://lkml.org/lkml/2008/12/16/481
# Fix: commit a47295e6bc42ad35f9c15ac66f598aa24debd4e2
#---------------------------------------------------------------------------
test_3()
{
if [ ! -e /proc/sched_debug ]; then
tst_resm TCONF "CONFIG_SCHED_DEBUG is not enabled"
return
fi
grep -q -w "cpu" /proc/cgroups
if [ $? -ne 0 ]; then
tst_resm TCONF "CONFIG_CGROUP_SCHED is not enabled"
return
fi
# Run the test for 30 secs
mount -t cgroup -o cpu xxx cgroup/
if [ $? -ne 0 ]; then
tst_resm TFAIL "Failed to mount cpu subsys"
failed=1
return
fi
./test_3_1.sh &
pid1=$!
./test_3_2.sh &
pid2=$!
sleep 30
/bin/kill -SIGUSR1 $pid1 $pid2
wait $pid1
wait $pid2
check_kernel_bug
if [ $? -eq 1 ]; then
tst_resm TPASS "no kernel bug was found"
fi
rmdir cgroup/* 2> /dev/null
umount cgroup/
}
#---------------------------------------------------------------------------
# Bug: cgroup hierarchy lock's lockdep subclass may overflow
# Kernel: 2.6.29-rcX
# Link: http://lkml.org/lkml/2009/2/4/67
# Fix:
#---------------------------------------------------------------------------
test_4()
{
if [ ! -e /proc/lockdep ]; then
tst_resm TCONF "CONFIG_LOCKDEP is not enabled"
return
fi
# MAX_LOCKDEP_SUBCLASSES is 8, so number of subsys should be > 8
lines=`cat /proc/cgroups | wc -l`
if [ $lines -le 9 ]; then
tst_resm TCONF "require more than 8 cgroup subsystems"
return
fi
mount -t cgroup -o none,name=foo cgroup cgroup/
mkdir cgroup/0
rmdir cgroup/0
umount cgroup/
dmesg | grep -q "MAX_LOCKDEP_SUBCLASSES too low"
if [ $? -eq 0 ]; then
tst_resm TFAIL "lockdep BUG was found"
failed=1
return
else
tst_resm TPASS "no lockdep BUG was found"
fi
}
#---------------------------------------------------------------------------
# Bug: When mount cgroup fs and the fs was busy, root_count should not be
# decremented in cgroup_kill_sb()
# Kernel: 2.6.29-rcX
# Links: https://openvz.org/pipermail/devel/2009-January/016345.html
# http://lkml.org/lkml/2009/1/28/190
# Fix: commit 839ec5452ebfd5905b9c69b20ceb640903a8ea1a
#---------------------------------------------------------------------------
test_5()
{
lines=`cat /proc/cgroups | wc -l`
if [ $lines -le 2 ]; then
tst_resm TCONF "require at least 2 cgroup subsystems"
return
fi
subsys1=`tail -n 1 /proc/cgroups | awk '{ print $1 }'`
subsys2=`tail -n 2 /proc/cgroups | head -1 | awk '{ print $1 }'`
mount -t cgroup -o $subsys1,$subsys2 xxx cgroup/
if [ $? -ne 0 ]; then
tst_resm TFAIL "mount $subsys1 and $subsys2 failed"
failed=1
return
fi
# This 2nd mount should fail
mount -t cgroup -o $subsys1 xxx cgroup/ 2> /dev/null
if [ $? -eq 0 ]; then
tst_resm TFAIL "mount $subsys1 should fail"
umount cgroup/
failed=1
return
fi
mkdir cgroup/0
# Otherwise we can't attach task
if [ "$subsys1" = cpuset -o "$subsys2" = cpuset ]; then
echo 0 > cgroup/0/cpuset.cpus 2> /dev/null
echo 0 > cgroup/0/cpuset.mems 2> /dev/null
fi
sleep 100 &
echo $! > cgroup/0/tasks
check_kernel_bug
if [ $? -eq 1 ]; then
tst_resm TPASS "no kernel bug was found"
fi
# clean up
/bin/kill -SIGTERM $! > /dev/null
wait $!
rmdir cgroup/0
umount cgroup/
}
#---------------------------------------------------------------------------
# Bug: There was a race between cgroup_clone and umount
# Kernel: 2.6.24 - 2.6.28, 2.6.29-rcX
# Links: http://lkml.org/lkml/2008/12/24/124
# Fix: commit 7b574b7b0124ed344911f5d581e9bc2d83bbeb19
#---------------------------------------------------------------------------
test_6()
{
grep -q -w "ns" /proc/cgroups
if [ $? -ne 0 ]; then
tst_resm TCONF "CONFIG_CGROUP_NS"
return
fi
# run the test for 30 secs
./test_6_1.sh &
pid1=$!
./test_6_2 &
pid2=$!
sleep 30
/bin/kill -SIGUSR1 $pid1
/bin/kill -SIGTERM $pid2
wait $pid1
wait $pid2
check_kernel_bug
if [ $? -eq 1 ]; then
tst_resm TPASS "no kernel bug was found"
fi
# clean up
mount -t cgroup -o ns xxx cgroup/ > /dev/null 2>&1
rmdir cgroup/[1-9]* > /dev/null 2>&1
umount cgroup/
}
#---------------------------------------------------------------------------
# Bug: There was a bug when remount cgroup fs with some dead subdirs in
# it (rmdir()ed but still has some refcnts on it). It caused memory
# leak, and may cause oops when cat /proc/sched_debug.
# Kernel: 2.6.24 - 2.6.27, 2.6.28-rcX
# Links: http://lkml.org/lkml/2008/12/10/369
# Fix: commit 307257cf475aac25db30b669987f13d90c934e3a
#---------------------------------------------------------------------------
test_7_1()
{
mount -t cgroup -o $subsys xxx cgroup/
if [ $? -ne 0 ]; then
tst_resm TFAIL "failed to mount $subsys"
failed=1
return
fi
mkdir cgroup/0
sleep 100 < cgroup/0 & # add refcnt to this dir
rmdir cgroup/0
# remount with new subsystems added
# since 2.6.28, this remount will fail
mount -t cgroup -o remount xxx cgroup/ 2> /dev/null
/bin/kill -SIGTERM $!
wait $!
umount cgroup/
}
test_7_2()
{
mount -t cgroup -o none,name=foo cgroup cgroup/
if [ $? -ne 0 ]; then
tst_resm TFAIL "failed to mount cgroup"
failed=1
return
fi
mkdir cgroup/0
sleep 100 < cgroup/0 & # add refcnt to this dir
rmdir cgroup/0
# remount with some subsystems removed
# since 2.6.28, this remount will fail
mount -t cgroup -o remount,$subsys xxx cgroup/ 2> /dev/null
/bin/kill -SIGTERM $!
wait $!
umount cgroup/
# due to the bug, reading /proc/sched_debug may lead to oops
grep -q -w "cpu" /proc/cgroups
if [ $? -ne 0 -o ! -e /proc/sched_debug ]; then
return
fi
tmp=0
while [ $tmp -lt 50 ] ; do
echo 3 > /proc/sys/vm/drop_caches
cat /proc/sched_debug > /dev/null
: $(( tmp += 1 ))
done
}
test_7()
{
lines=`cat /proc/cgroups | wc -l`
if [ $lines -le 2 ]; then
tst_resm TCONF "require at least 2 cgroup subsystems"
slt_result $SLT_Untested
return
fi
subsys=`tail -n 1 /proc/cgroups | awk '{ print $1 }'`
# remount to add new subsystems to the hierarchy
i=1
while [ $i -le 2 ] ; do
test_7_$i
if [ $? -ne 0 ]; then
return
fi
check_kernel_bug
if [ $? -eq 0 ]; then
return
fi
: $(( i += 1 ))
done
tst_resm TPASS "no kernel bug was found"
}
#---------------------------------------------------------------------------
# Bug: oops when get cgroupstat of a cgroup control file
# Kernel: 2.6.24 - 2.6.27, 2.6.28-rcX
# Links: http://lkml.org/lkml/2008/11/19/53
# Fix: commit 33d283bef23132c48195eafc21449f8ba88fce6b
#---------------------------------------------------------------------------
test_8()
{
mount -t cgroup -o none,name=foo cgroup cgroup/
if [ $? -ne 0 ]; then
tst_resm TFAIL "failed to mount cgroup filesystem"
failed=1
return
fi
./getdelays -C cgroup/tasks > /dev/null 2>&1
if [ $? -eq 0 ]; then
tst_resm TFAIL "should have failed to get cgroupstat of tasks file"
umount cgroup/
failed=1
return
fi
check_kernel_bug
if [ $? -eq 1 ]; then
tst_resm TPASS "no kernel bug was found"
fi
umount cgroup/
}
#---------------------------------------------------------------------------
# Bug: When running 2 concurrent mount/umount threads, lockdep warning
# may be triggered, it's a false positive, and it's VFS' issue but
# not cgroup.
# Kernel: 2.6.24 - 2.6.29-rcX
# Links: http://lkml.org/lkml/2009/1/4/352
# Fix: commit ada723dcd681e2dffd7d73345cc8fda0eb0df9bd
#---------------------------------------------------------------------------
test_9()
{
./test_9_1.sh &
pid1=$!
./test_9_2.sh &
pid2=$!
sleep 30
/bin/kill -SIGUSR1 $pid1 $pid2
wait $pid1
wait $pid2
umount cgroup/ 2> /dev/null
check_kernel_bug
if [ $? -eq 1 ]; then
tst_resm TPASS "no kernel warning was found"
fi
}
#---------------------------------------------------------------------------
# Bug: When running 2 concurrent mount/umount threads, kernel WARNING
# may be triggered, but it's VFS' issue but not cgroup.
# Kernel: 2.6.24 - 2.6.29-rcX
# Links: http://lkml.org/lkml/2009/1/4/354
# Fix: commit 1a88b5364b535edaa321d70a566e358390ff0872
#---------------------------------------------------------------------------
test_10()
{
./test_10_1.sh &
pid1=$!
./test_10_2.sh &
pid2=$!
sleep 30
/bin/kill -SIGUSR1 $pid1 $pid2
wait $pid1
wait $pid2
mount -t cgroup none cgroup 2> /dev/null
rmdir cgroup/0
umount cgroup/
check_kernel_bug
if [ $? -eq 1 ]; then
tst_resm TPASS "no kernel warning was found"
fi
}
# main
mkdir cgroup/
for ((cur = 1; cur <= $TST_TOTAL; cur++))
{
export TST_COUNT=$cur
test_$cur
}
find cgroup/ -maxdepth 1 -depth -exec rmdir {} +
exit $failed