tests/generic/068

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
#
# FSQA Test No. 068
#
# Test case to reproduce xfs_freeze hang under filsystem load.
# The fail case for this test is a hang on an xfs_freeze.
#
. ./common/preamble
_begin_fstest other auto freeze stress mmap

status=0	# success is the default!

ITERATIONS=10

# Override the default cleanup function.
_cleanup()
{
	# Make sure $SCRATCH_MNT is unfreezed
	xfs_freeze -u $SCRATCH_MNT 2>/dev/null
	_kill_fsstress
	cd /
	rm -f $tmp.*
}

# Import common functions.
. ./common/filter


_require_scratch
_require_freeze

echo "*** init FS"

_scratch_unmount >/dev/null 2>&1
echo "*** MKFS ***"                         >>$seqres.full
echo ""                                     >>$seqres.full
_scratch_mkfs                               >>$seqres.full 2>&1 \
    || _fail "mkfs failed"
_scratch_mount

touch $tmp.running

# start fsstress loop in a background block
{
    STRESS_DIR="$SCRATCH_MNT/fsstress_test_dir"
    mkdir "$STRESS_DIR"

    procs=2
    nops=200
    while [ -f "$tmp.running" ]
      do
      # We do both read & write IO - not only is this more realistic,
      # but it also potentially tests atime updates
      FSSTRESS_ARGS=`_scale_fsstress_args -d $STRESS_DIR -p $procs -n $nops`
      _run_fsstress $FSSTRESS_ARGS >>$seqres.full
    done

    rm -r $STRESS_DIR/*
    rmdir $STRESS_DIR
} &
pid=$!

# start fstest -m loop in a background block; this gets us mmap coverage
{
    FSTEST_DIR="$SCRATCH_MNT/fstest_test_dir"
    mkdir "$FSTEST_DIR"

    procs=2
    while [ -f "$tmp.running" ]
      do
      $here/src/fstest -m -p $FSTEST_DIR  -n $procs -f 4 > /dev/null 2>&1
    done

    rm -rf $FSTEST_DIR/*
    rmdir $FSTEST_DIR
} &
pid="$pid $!"

i=0
let ITERATIONS=$ITERATIONS-1

echo | tee -a $seqres.full
while [ $i -le $ITERATIONS ]
do
        echo "*** iteration: $i" | tee -a $seqres.full
	echo "*** freezing \$SCRATCH_MNT" | tee -a $seqres.full
	xfs_freeze -f "$SCRATCH_MNT" | tee -a $seqres.full
	[ $? != 0 ] && echo xfs_freeze -f "$SCRATCH_MNT" failed | \
	    tee -a $seqres.full
	sleep 2

	echo "*** thawing  \$SCRATCH_MNT" | tee -a $seqres.full
	xfs_freeze -u "$SCRATCH_MNT" | tee -a $seqres.full
	[ $? != 0 ] && echo xfs_freeze -u "$SCRATCH_MNT" failed | \
	    tee -a $seqres.full
	sleep 2

	echo  | tee -a $seqres.full
	let i=$i+1
done

# stop fsstress iterations
rm $tmp.running

# wait for fsstresses to finish
wait $pid
unset pid

exit 1