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#! /bin/bash
# FS QA Test No. 109
#
# ENOSPC deadlock case from Asano Masahiro.
#
#-----------------------------------------------------------------------
# Copyright (c) 2005 Silicon Graphics, Inc. All Rights Reserved.
#
# 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.
#
# 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. 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 the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#-----------------------------------------------------------------------
#
# creator
owner=nathans@sgi.com
seq=`basename $0`
echo "QA output created by $seq"
here=`pwd`
tmp=/tmp/$$
status=1 # failure is the default!
trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
# real QA test starts here
_supported_fs xfs
_supported_os Linux XFS
_require_scratch
populate()
{
# "faststart" lets us effectively skip (re-)population
[ "X$faststart" != "X" ] && rm -f $SCRATCH_MNT/F*
# create many small files using most available space
echo "creating small files..."
i=0
while [ $i -le $files -a "X$faststart" = "X" ]; do
file=$SCRATCH_MNT/f$i
xfs_io -f -d -c 'pwrite -b 64k 0 64k' $file >/dev/null
let i=$i+1
done
# remove every second file, freeing up lots of space
echo "removing small files..."
i=1
while [ $i -le $files -a "X$faststart" = "X" ]; do
rm $SCRATCH_MNT/f$i
let i=$i+2
done
echo "flushing changes via umount/mount."
umount $SCRATCH_DEV
_scratch_mount
}
allocate()
{
# now try to hit the deadlock
echo "starting parallel allocators..."
i=0
while [ $i -le 10 ]; do
file=$SCRATCH_MNT/F$i
{
j=0
while [ $j -lt 100 ]; do
xfs_io -f -c 'pwrite -b 64k 0 16m' $file \
>/dev/null 2>&1
rm $file
let j=$j+1
done
} &
let i=$i+1
done
wait
echo "all done!"
}
# real QA test starts here
umount $SCRATCH_DEV 2>/dev/null
_scratch_mount
# see if faststart is possible (and requested)
files=2000
faststart=""
if [ -n "$FASTSTART" -a -f $SCRATCH_MNT/f0 ]; then
faststart="-N" # causes us to skip the mkfs step
fi
umount $SCRATCH_DEV
_scratch_mkfs_xfs -dsize=160m,agcount=4 $faststart | _filter_mkfs 2>$tmp.mkfs
cat $tmp.mkfs >>$seq.full
_scratch_mount
populate
allocate
status=0
exit
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