2010-03-06 11:22:58 +11:00
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#! /bin/bash
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# FS QA Test No. 224
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#
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# Delayed allocation at ENOSPC test
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#
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# Derived from a test case from Lachlan McIlroy and improved to
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# reliably trigger a BUG in xfs_get_blocks(). Despite this XFS
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# focus, the test can to run on any filesystem to exercise ENOSPC
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# behaviour.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2010 Dave Chinner. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License 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 the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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2013-03-15 12:28:02 +00:00
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seqres=$RESULT_DIR/$seq
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2010-03-06 11:22:58 +11:00
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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_cleanup()
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{
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rm -f $tmp.*
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rm -f $SCRATCH_MNT/testfile.*
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}
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trap "_cleanup ; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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2013-03-15 12:28:04 +00:00
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. ./common/rc
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. ./common/filter
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2010-03-06 11:22:58 +11:00
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_scratch
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# make a 1GB filesystem
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2013-03-15 12:28:02 +00:00
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_scratch_mkfs_sized `expr 1024 \* 1024 \* 1024` > $seqres.full 2>&1
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_scratch_mount >> $seqres.full 2>&1
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2010-03-06 11:22:58 +11:00
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# set the reserved block pool to almost empty for XFS
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if [ "$FSTYP" = "xfs" ]; then
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2013-03-15 12:28:02 +00:00
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xfs_io -x -c "resblks 4" $SCRATCH_MNT >> $seqres.full 2>&1
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2010-03-06 11:22:58 +11:00
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fi
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FILES=1000
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for i in `seq 0 1 $FILES`; do
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# set the file size to be 10MB - that way the direct IO will always try
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# to read at least 10MB even if only 4k was written. This allows
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# discarded delalloc pages that would have been beyond EOF to be
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# tripped over.
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(
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sleep 5
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xfs_io -f -c "truncate 10485760" $SCRATCH_MNT/testfile.$i
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dd if=/dev/zero of=$SCRATCH_MNT/testfile.$i bs=4k conv=notrunc
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) > /dev/null 2>&1 &
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done
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wait
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for i in `seq 0 1 $FILES`; do
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dd of=/dev/null if=$SCRATCH_MNT/testfile.$i bs=512k iflag=direct > /dev/null 2>&1 &
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done
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wait
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echo "*** Silence is golden ***"
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status=0
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exit
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