Nathan,
I have made a second attempt at the script.
I think it addresses your concerns.
Someone still needs to do the TODO items, but they don't come up in my
environment because $SCRATCH_DEV is a LV for me.
Steve Lord has run my previous version to some extent, but I don't know if he
did it via check, or he just ran the script.
Greg Freemyer
Internet Engineer
Deployment and Integration Specialist
Compaq ASE - Tru64 v4, v5
Compaq Master ASE - SAN Architect
The Norcross Group
www.NorcrossGroup.com
======== 068.out
QA output created by 068
SUCCESS, COMPLETED ALL ITERATIONS WITH NO TIME OUTS!!!!!!!!!!!!
Cleanup beginning
======== 068
#! /bin/sh
# XFS QA Test No. 068
# $Id: 1.1 $
#
# Test LVM snapshot creation
#
# The timing and placement of kills and waits is particularily sensitive.
# Don't change them unless you want to spend some time getting it right again.
#
#-----------------------------------------------------------------------
# Copyright (c) 2000, 2002 Silicon Graphics, Inc. All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2 of the GNU 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.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like. Any license provided herein, whether implied or
# otherwise, applies only to this software file. Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
# Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
# Mountain View, CA 94043, or:
#
# http://www.sgi.com
#
# For further information regarding this notice, see:
#
# http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
#-----------------------------------------------------------------------
#
# creator
owner=freemyer@xxxxxxxxxxxxxxxxx
seq=`basename $0`
echo "QA output created by $seq"
here=`pwd`
tmp=/tmp/$$
status=1 # failure is the default!
GENERATE_IO_LOAD=TRUE # If "FALSE", the dd load loop is skipped
DELAY_BETWEEN_ITERATIONS=10
ITERATIONS=20
VG=/dev/VGscratch
#SCRATCH_DEV=/dev/xxxx # Only needed if running by hand, ie. check
sets these
#SCRATCH_MNT=/scratch # Only needed if running by hand, ie. check
sets these
SCRATCH_SNAP_MNT=$tmp.scratch_snap
_cleanup()
{
echo Cleanup beginning
rm $tmp.running > /dev/null 2>&1
xfs_freeze -u $SCRATCH_MNT
sleep 10 # Give the dd loop time to finish
# Comment out unless needed. If needed, wrap with logic to ensure the
FS is mounted
#Kill off any other possible stray stragglers that may be out there.
There should not be any.
# fuser -k -m $SCRATCH_SNAP_MNT/dummy >/dev/null 2>&1
# fuser -k -m $SCRATCH_MNT/dummy >/dev/null 2>&1
wait
umount $SCRATCH_SNAP_MNT > /dev/null 2>&1
rmdir $SCRATCH_SNAP_MNT > /dev/null 2>&1
umount $SCRATCH_MNT > /dev/null 2>&1
lvremove -f $VG/scratch_snap > /dev/null 2>&1
lvremove -f $VG/scratch > /dev/null 2>&1
#TODO vgremove $VG
rm -f $tmp.* # if we ever use tmp files
trap 0 1 2 3 15
exit $status
}
trap "_cleanup" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
if [ -e $SCRATCH_SNAP_MNT ]; then rm -rf $SCRATCH_SNAP_MNT; fi
mkdir $SCRATCH_SNAP_MNT
#Verify we have the lvm user tools
[ -x /sbin/lvcreate ] || _notrun "LVM lvcreate utility is not installed in
/sbin"
[ -x /sbin/lvremove ] || _notrun "LVM lvremove utility is not installed in
/sbin"
# if the above fails for LVM 2, the below may be useful notes
# try "lvm vgdisplay --version" and look for a > 1.9x version number, eg,
#
# LVM version: 1.95.10-cvs (2002-05-31)
# Library version: 0.96.03-ioctl-cvs (2002-06-27)
# Driver version: 1.0.3
#Verify we have the a lvm enabled kernel
LVM=false
#Check if LVM 1 is in the kernel
if grep lvm /proc/devices > /dev/null 2>&1; then LVM=true; fi
#Check if LVM 2 is in the kernel
if grep device-mapper /proc/devices > /dev/null 2>&1; then LVM=true; fi
#Check if EVMS is in the kernel
# TODO # I don't know how to do this one.
if [ $LVM = false ]; then _notrun "This test requires the kernel have LVM or
EVMS present. (The EVMS test is still TBD)."; fi
# real QA test starts here
# Create a PV set from the scratch partition
# TODO # (I don't know if this is needed.and it is dangerous because it
intentionally deletes the partition table!!!
# TODO # dd if=/dev/zero of=$SCRATCH_DEV bs=512 count=1
# TODO # pvcreate $SCRATCH_DEV
# Create a VG from the PV
# TODO # vgcreate $VG $SCRATCH_DEV
# Create a LV in the VG to snapshot
# TODO # lvcreate -L 2G -n scratch $VG
# Mount the LV
mkdir $SCRATCH_MNT > /dev/null 2&>1
mount $VG/scratch $SCRATCH_MNT
if [ $GENERATE_IO_LOAD != FALSE ];
then
# Create a large 64 Meg zero filled file on the LV
dd if=/dev/zero of=$SCRATCH_MNT/dummy bs=64k count=1000 > /dev/null
2>&1
#setup an infinite loop to copy the large file, thus generating heavy
i/o
touch $tmp.running
while [ -f $tmp.running ]
do
dd if=$SCRATCH_MNT/dummy of=$SCRATCH_MNT/junk bs=64k > /dev/null
2>&1
rm $SCRATCH_MNT/junk # This forces metadata updates the next
time around
sync
done &
fi
ii=1
while [ $ii -le $ITERATIONS ]
do
# echo $ii Usefull if your are running interactive, but not from
the xfs test scripts
#if the VFS lock patch is present, the calls to xfs_freeze are
redundant, but should cause no problems
# OPTIONAL
xfs_freeze -f $SCRATCH_MNT
if [ $? != 0 ] ; then
echo xfs_freeze -f $SCRATCH_MNT failed
fi
(
lvcreate --snapshot --size 1G --name scratch_snap $VG/scratch >
/dev/null 2>&1
ret=$?
if [ $ret != 0 ] ; then
echo snapshot creation for $SCRATCH_MNT failed with
return code $ret
fi
) &
SNAPSHOT_shell_pid=$!
#if the Snapshot has not completed in ten minutes, kill it
(
# I have NOT figured out how to kill the sleep 600
before it exits naturally.
# This does not cause a problem, but it clutters the ps
table.
sleep 600
# The kill $TIMEOUT_shell_pid keeps the below from
occuring
echo Snapshot Lockup Occured on loop $ii
xfs_freeze -u $SCRATCH_MNT
kill $$
) &
TIMEOUT_shell_pid=$!
wait $SNAPSHOT_shell_pid
exec 2> /dev/null # Send the shells stderr to /dev/null
kill $TIMEOUT_shell_pid #Cancel the timeout
wait $TIMEOUT_shell_pid # This causes consistent shell notification
for some unknow reason
exec 2>&1 # Put it back to the same as stdout
#if the VFS lock patch is present, the calls to xfs_freeze are
redundant, but should cause no problems
# OPTIONAL
xfs_freeze -u $SCRATCH_MNT
if [ $? != 0 ] ; then
echo xfs_freeze -u $SCRATCH_MNT failed
fi
# MANDANTORY (end)
mount -t xfs -o ro,nouuid $VG/scratch_snap $SCRATCH_SNAP_MNT
if [ $? != 0 ] ; then
echo mount for $SCRATCH_SNAP_MNT failed
fi
umount $SCRATCH_SNAP_MNT
if [ $? != 0 ] ; then
echo umount for $SCRATCH_SNAP_MNT failed
fi
lvremove -f $VG/scratch_snap > /dev/null 2>&1
if [ $? != 0 ] ; then
echo lvremove for $VG/scratch_snap failed
fi
ii=`expr $ii + 1`
sleep $DELAY_BETWEEN_ITERATIONS # The VG seems to need time to
stabalize between snapshots
# With LVM 1.0.3 and XFS 1.1, I have tried this at 3600
seconds and still had failures
done
# success, all done
echo SUCCESS, COMPLETED ALL ITERATIONS WITH NO TIME OUTS!!!!!!!!!!!!
status=0
_cleanup
exit 1 # _cleanup should exit, so we should never get here.
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