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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Red Hat Inc. All Rights Reserved.
#
# FS QA Test No. generic/027
#
# Run 8 processes writing 1k files to seperate files in seperate dirs to
# hit ENOSPC on small fs with little free space. Loop for 100 iterations.
#
# Regression test for
# 34cf865 ext4: fix deadlock when writing in ENOSPC conditions
#
. ./common/preamble
_begin_fstest auto enospc
create_file()
{
local dir=$1
local direct=$2
local i=0
mkdir -p $dir >/dev/null 2>&1
while $XFS_IO_PROG -f $direct -c "pwrite 0 1k" $dir/file_$i >/dev/null 2>&1; do
let i=$i+1
done
}
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs generic
_require_scratch
# This takes forever with compression because we don't actually fill up the
# disk, simply disable it if we have compression enabled.
_require_no_compress
echo "Silence is golden"
_scratch_mkfs_sized $((256 * 1024 * 1024)) >>$seqres.full 2>&1
_scratch_mount
echo "Reserve 2M space" >>$seqres.full
$XFS_IO_PROG -f -c "pwrite 0 2m" $SCRATCH_MNT/testfile >>$seqres.full 2>&1
echo "Fulfill the fs" >>$seqres.full
$XFS_IO_PROG -f -c "pwrite 0 254m" $SCRATCH_MNT/bigfile >>$seqres.full 2>&1
echo "Remove reserved file" >>$seqres.full
rm -f $SCRATCH_MNT/testfile
loop=100
# btrfs takes much longer time, reduce the loop count
if [ "$FSTYP" == "btrfs" ]; then
loop=10
fi
dir=$SCRATCH_MNT/testdir
echo -n "iteration" >>$seqres.full
i=1
while [ $i -le $loop ]; do
echo -n " $i" >>$seqres.full
nr_worker=8
while [ $nr_worker -gt 0 ]; do
# half buffered I/O half direct I/O
if [ `expr $nr_worker % 2` -eq 0 ]; then
create_file $dir/$nr_worker -d >>$seqres.full &
else
create_file $dir/$nr_worker >>$seqres.full &
fi
let nr_worker=$nr_worker-1
done
wait
rm -rf $dir
let i=$i+1
done
_scratch_unmount
status=0
exit
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