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|
#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2020-2021 Red Hat, Inc. All Rights Reserved.
#
# FS QA Test No. 168
#
# XFS online shrinkfs stress test
#
# This test attempts to shrink unused space as much as possible with
# background fsstress workload. It will decrease the shrink size if
# larger size fails. And totally repeat 2 * TIME_FACTOR times.
#
. ./common/preamble
_begin_fstest auto growfs shrinkfs ioctl prealloc stress
# Import common functions.
. ./common/filter
create_scratch()
{
_scratch_mkfs_xfs $@ | tee -a $seqres.full | \
_filter_mkfs 2>$tmp.mkfs >/dev/null
. $tmp.mkfs
_scratch_mount
# fix the reserve block pool to a known size so that the enospc
# calculations work out correctly.
_scratch_resvblks 1024 > /dev/null 2>&1
}
fill_scratch()
{
$XFS_IO_PROG -f -c "falloc 0 $1" $SCRATCH_MNT/resvfile
}
stress_scratch()
{
local procs=3
local nops=1000
# -w ensures that the only ops are ones which cause write I/O
local FSSTRESS_ARGS=`_scale_fsstress_args -d $SCRATCH_MNT -w \
-p $procs -n $nops $FSSTRESS_AVOID`
$FSSTRESS_PROG $FSSTRESS_ARGS >> $seqres.full 2>&1
}
# real QA test starts here
_supported_fs xfs
_require_scratch_xfs_shrink
_require_xfs_io_command "falloc"
_scratch_mkfs_xfs | tee -a $seqres.full | _filter_mkfs 2>$tmp.mkfs >/dev/null
. $tmp.mkfs # extract blocksize and data size for scratch device
endsize=`expr 125 \* 1048576` # stop after shrinking this big
[ `expr $endsize / $dbsize` -lt $dblocks ] || _notrun "Scratch device too small"
nags=2
totalcount=$((2 * TIME_FACTOR))
while [ $totalcount -gt 0 ]; do
size=`expr 1010 \* 1048576` # 1010 megabytes initially
logblks=$(_scratch_find_xfs_min_logblocks -dsize=${size} -dagcount=${nags})
create_scratch -lsize=${logblks}b -dsize=${size} -dagcount=${nags}
for i in `seq 125 -1 90`; do
fillsize=`expr $i \* 1048576`
out="$(fill_scratch $fillsize 2>&1)"
echo "$out" | grep -q 'No space left on device' && continue
test -n "${out}" && echo "$out"
break
done
# shrink in chunks of this size at most
decsize=`expr 41 \* 1048576 + 1 + $RANDOM \* $RANDOM % 1048576`
while [ $size -gt $endsize ]; do
stress_scratch &
sleep 1
decb=`expr $decsize / $dbsize` # in data blocks
while [ $decb -gt 0 ]; do
sizeb=`expr $size / $dbsize - $decb`
$XFS_GROWFS_PROG -D ${sizeb} $SCRATCH_MNT \
>> $seqres.full 2>&1 && break
[ $decb -gt 100 ] && decb=`expr $decb + $RANDOM % 10`
decb=`expr $decb / 2`
done
wait
[ $decb -eq 0 ] && break
# get latest dblocks
$XFS_INFO_PROG $SCRATCH_MNT 2>&1 | _filter_mkfs 2>$tmp.growfs >/dev/null
. $tmp.growfs
size=`expr $dblocks \* $dbsize`
_scratch_unmount
_scratch_xfs_repair -n >> $seqres.full 2>&1 || \
_fail "xfs_repair failed with shrinking $sizeb"
_scratch_mount
done
_scratch_unmount
_scratch_xfs_repair -n >> $seqres.full 2>&1 || \
_fail "xfs_repair failed with shrinking $sizeb"
totalcount=`expr $totalcount - 1`
done
echo "Silence is golden"
status=0
exit
|
