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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2010 Dave Chinner. All Rights Reserved.
#
# FS QA Test No. 224
#
# Delayed allocation at ENOSPC test
#
# Derived from a test case from Lachlan McIlroy and improved to
# reliably trigger a BUG in xfs_get_blocks(). Despite this XFS
# focus, the test can to run on any filesystem to exercise ENOSPC
# behaviour.
#
. ./common/preamble
_begin_fstest auto
# Override the default cleanup function.
_cleanup()
{
rm -f $tmp.*
rm -f $SCRATCH_MNT/testfile.*
}
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs generic
_require_scratch
# make a 1GB filesystem
_scratch_mkfs_sized `expr 1024 \* 1024 \* 1024` > $seqres.full 2>&1
_scratch_mount >> $seqres.full 2>&1
# set the reserved block pool to almost empty for XFS
if [ "$FSTYP" = "xfs" ]; then
$XFS_IO_PROG -x -c "resblks 4" $SCRATCH_MNT >> $seqres.full 2>&1
fi
FILES=1000
for i in `seq 0 1 $FILES`; do
# set the file size to be 10MB - that way the direct IO will always try
# to read at least 10MB even if only 4k was written. This allows
# discarded delalloc pages that would have been beyond EOF to be
# tripped over.
(
sleep 5
$XFS_IO_PROG -f -c "truncate 10485760" $SCRATCH_MNT/testfile.$i
dd if=/dev/zero of=$SCRATCH_MNT/testfile.$i bs=4k conv=notrunc
) > /dev/null 2>&1 &
done
wait
for i in `seq 0 1 $FILES`; do
dd of=/dev/null if=$SCRATCH_MNT/testfile.$i bs=512k iflag=direct > /dev/null 2>&1 &
done
wait
echo "*** Silence is golden ***"
# unmount and check dmesg, filtering out expected warnings about mixed
# direct and buffered I/O
_scratch_unmount
_check_dmesg _filter_aiodio_dmesg
status=$?
exit
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