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#!/bin/bash
# usage ./runlibcgrouptest.sh
# Copyright IBM Corporation. 2008
#
# Author: Sudhir Kumar <skumar@linux.vnet.ibm.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2.1 of the GNU Lesser General Public License
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Description: This script runs the the basic tests for testing libcgroup apis.
#
DEBUG=false; # for debug messages
FS_MOUNTED=0; # 0 for not mounted, 1 for mounted, 2 for multimounted
MOUNTPOINT=/dev/cgroup_controllers; # Just to initialize
TARGET=/dev/cgroup_controllers;
CONTROLLERS=cpu,memory;
NUM_MOUNT=1; # Number of places to be mounted on
MULTIMOUNT=false; # mounted at on epoint only
debug()
{
# Function parameter is the string to print out
if $DEBUG
then
echo SH:DBG: $1;
fi
}
check_mount_fs ()
{
local NUM_MOUNT=0;
CGROUP=`cat /proc/mounts|grep -w cgroup|tr -s [:space:]|cut -d" " -f3`;
# get first word in case of multiple mounts
CGROUP=`echo $CGROUP|cut -d" " -f1`;
debug "check_mount_fs(): CGROUP is $CGROUP";
if [ "$CGROUP" = "cgroup" ]
then
NUM_MOUNT=`cat /proc/mounts|grep -w cgroup|wc -l`;
debug "check_mount_fs(): fs mounted at $NUM_MOUNT places";
if [ $NUM_MOUNT -eq 1 ]
then
FS_MOUNTED=1;
else
# Any number of mounts is multi mount
FS_MOUNTED=2;
fi;
return 0; # True
else
FS_MOUNTED=0;
return 1; # false
fi
}
umount_fs ()
{
while check_mount_fs
do
PROC_ENTRY=`cat /proc/mounts|grep cgroup|tr -s [:space:]|cut -d" " -f2`;
# Get first mountpoint in case of multiple mounts
PROC_ENTRY=`echo $PROC_ENTRY|cut -d" " -f1`;
if [ ! -z "$PROC_ENTRY" ]
then
TARGET=$PROC_ENTRY;
# Need to take care if there are tasks running in any group ??
# Also need to care if cpu and memory are mounted at different places
rmdir $TARGET/* 2> /dev/null ;
umount $TARGET;
rmdir $TARGET;
debug "umounted $TARGET";
fi;
done
FS_MOUNTED=0;
TARGET=/dev/cgroup_controllers; #??
echo "Cleanup done";
}
# Check if kernel is not having any of the controllers enabled
no_controllers()
{
CPU="";
MEMORY="";
if [ -e /proc/cgroups ]
then
CPU=`cat /proc/cgroups|grep -w cpu|cut -f1`;
MEMORY=`cat /proc/cgroups|grep -w memory|cut -f1`;
fi;
if [ ! -z $CPU ] && [ ! -z $MEMORY ]
then
CONTROLLERS=$CPU,$MEMORY ;
return 1; # false
elif [ ! -z $CPU ]
then
CONTROLLERS=$CPU ;
return 1; # false
elif [ ! -z $MEMORY ]
then
CONTROLLERS=$MEMORY ;
return 1; # false
fi;
# Kernel has no controllers enabled
return 0; # true
}
mount_fs ()
{
local NUM_MOUNT=0; # On how many places to mount on
local CUR_MOUNT=1;
FS_MOUNTED=0;
# Check if kernel has controllers enabled
if no_controllers
then
echo "Kernel has no controllers enabled";
echo "Recompile your kernel with controllers enabled"
echo "Exiting the tests.....";
exit 1;
fi;
# At least one Controller is enabled. So proceed further.
if [ -z $1 ]
then
echo "WARN: No parameter passed to function mount_fs";
echo "taking default as 0....So not mounting cgroup fs";
else
NUM_MOUNT=$1;
debug "mount_fs fs will be mounted on $NUM_MOUNT places";
fi;
# create so many directories i.e. mountpoints
while [ $NUM_MOUNT -ge $CUR_MOUNT ]
do
NEWTARGET="$TARGET-$CUR_MOUNT";
if [ -e $NEWTARGET ]
then
echo "WARN: $NEWTARGET already exist..overwriting";
check_mount_fs; # Possibly fs might be mounted on it
if [ $FS_MOUNTED -gt 0 ]
then
umount_fs;
else
rmdir $NEWTARGET ;
fi;
fi;
mkdir $NEWTARGET;
# In case of multimount, mount controllers at diff points
if $MULTIMOUNT ; then
if [ $CPU ] && [ $MEMORY ] ; then
if [ $CUR_MOUNT -eq 1 ] ; then
CONTROLLERS="cpu";
else
CONTROLLERS="memory";
fi;
else
echo "Only 1 controleer enabled in kernel";
echo "So not running multiple mount testcases";
exit 1;
fi;
fi;
mount -t cgroup -o $CONTROLLERS cgroup $NEWTARGET; # 2> /dev/null?
if [ $? -ne 0 ]
then
echo "ERROR: Could not mount cgroup filesystem on $NEWTARGET."
echo "Exiting test";
umount_fs;
exit -1;
fi;
CUR_MOUNT=`expr $CUR_MOUNT + 1`;
FS_MOUNTED=`expr $FS_MOUNTED + 1`;
# Group created earlier may again be visible if not cleaned.
# So clean them all
if [ -e $NEWTARGET/group1 ] # first group that is created
then
# Need to handle if tasks are running in them
rmdir $NEWTARGET/group*
echo "WARN: Earlier groups found and removed...";
fi;
debug "cgroup filesystem mounted on $NEWTARGET directory"
done;
if [ $FS_MOUNTED -gt 2 ]
then
FS_MOUNTED=2;
fi;
}
get_mountpoint()
{
# need to handle how to pass multiple mount points to C file
# It will depend on the requirements if any
MOUNTPOINT=`cat /proc/mounts|grep -w cgroup|tr -s [:space:]| \
cut -d" " -f2`;
debug "mountpoint is $MOUNTPOINT"
}
runtest()
{
MOUNT_INFO=$1;
TEST_EXEC=$2;
if [ -f $TEST_EXEC ]
then
./$TEST_EXEC $MOUNT_INFO $MOUNTPOINT;
if [ $? -ne 0 ]
then
echo Error in running ./$TEST_EXEC
echo Exiting tests.
else
PID=$!;
fi;
else
echo Sources not compiled. please run make;
fi
}
# TestSet01: Run tests without mounting cgroup filesystem
echo;
echo Running first set of testcases;
echo ==============================
FS_MOUNTED=0;
FILE=libcgrouptest01;
check_mount_fs;
# unmount fs if already mounted
if [ $FS_MOUNTED -ne 0 ]
then
umount_fs;
fi;
debug "FS_MOUNTED = $FS_MOUNTED"
runtest $FS_MOUNTED $FILE
wait $PID;
RC=$?;
if [ $RC -ne 0 ]
then
echo Test binary $FILE exited abnormaly with return value $RC;
# Do not exit here. Failure in this case does not imply
# failure in other cases also
fi;
# TestSet02: Run tests with mounting cgroup filesystem
echo;
echo Running second set of testcases;
echo ==============================
FILE=libcgrouptest01;
check_mount_fs;
# mount fs at one point if not already mounted or multimounted
NUM_MOUNT=1;
if [ $FS_MOUNTED -eq 0 ]
then
mount_fs $NUM_MOUNT;
elif [ $FS_MOUNTED -gt 1 ]
then
umount_fs;
mount_fs $NUM_MOUNT;
fi;
debug "FS_MOUNTED = $FS_MOUNTED"
get_mountpoint;
runtest $FS_MOUNTED $FILE
wait $PID;
RC=$?;
if [ $RC -ne 0 ]
then
echo Test binary $FILE exited abnormaly with return value $RC;
fi;
umount_fs;
# TestSet03: Run tests with mounting cgroup filesystem at multiple points
echo;
echo Running third set of testcases;
echo ==============================
FILE=libcgrouptest01;
check_mount_fs;
# mount fs at multiple points
MULTIMOUNT=true;
NUM_MOUNT=2;
if [ $FS_MOUNTED -eq 0 ]
then
mount_fs $NUM_MOUNT;
elif [ $FS_MOUNTED -eq 1 ]
then
umount_fs;
mount_fs $NUM_MOUNT;
fi;
debug "FS_MOUNTED = $FS_MOUNTED"
get_mountpoint;
runtest $FS_MOUNTED $FILE
wait $PID;
RC=$?;
if [ $RC -ne 0 ]
then
echo Test binary $FILE exited abnormaly with return value $RC;
fi;
umount_fs;
exit 0;
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