#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2006 Silicon Graphics, Inc.  All Rights Reserved.
#
# FS QA Test No. 121
#
# To test log replay for the unlinked list.
# So we create unlinked and still referenced inodes
# and make sure that no clearing of the unlinked AGI buckets
# are happening.
# See pv#953263.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/log

# real QA test starts here
_supported_fs xfs

rm -f $seqres.full
rm -f $tmp.log

_require_scratch

echo "mkfs"
_scratch_mkfs_xfs >>$seqres.full 2>&1 \
    || _fail "mkfs scratch failed"

echo "mount"
_scratch_mount

# num_files must be greater than 64 (XFS_AGI_UNLINKED_BUCKETS)
# so that there will be at least one linked list from one of
# the 64 buckets, so that we can decode a di_next_unlinked field
num_files=200
delay=5
echo "open and unlink $num_files files"
$here/src/multi_open_unlink -f $SCRATCH_MNT/test_file -n $num_files -s $delay &

# time to create and unlink all the files
sleep 3

echo "godown"
_scratch_shutdown -v -f >> $seqres.full

# time for multi_open_unlink to exit out after its delay
# so we have no references and can unmount
wait 2>/dev/null

echo "unmount"
_scratch_unmount

echo "logprint after going down..."
_print_logstate

echo "mount with replay"
_try_scratch_mount $mnt >>$seqres.full 2>&1 \
    || _fail "mount failed: $mnt $MOUNT_OPTIONS"

echo "godown"
_scratch_shutdown -v -f >> $seqres.full

echo "unmount"
_scratch_unmount

echo "logprint after going down..."
_print_logstate

echo "logprint to check for CLEAR_AGI_BUCKET..."
if _scratch_xfs_logprint -t | tee -a $seqres.full | grep CLEAR; then
	echo 'CLEAR_AGI_BUCKET transactions found!!'
	echo 'Are you running with an old xfs kernel - where the bug still exists?'
else
	echo 'No CLEAR_AGI_BUCKET found in transactions - great - test passed :)'
fi

# clean up dirty log with log recovery on mount
_scratch_mount

# success, all done
status=0
exit