#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2021 Chandan Babu R.  All Rights Reserved.
#
# FS QA Test 530
#
# Verify that XFS does not cause bitmap/summary inode fork's extent count to
# overflow when growing an the realtime volume of the filesystem.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

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

_cleanup()
{
	cd /
	_scratch_unmount >> $seqres.full 2>&1
	test -e "$rtdev" && losetup -d $rtdev >> $seqres.full 2>&1
	rm -f $tmp.* $TEST_DIR/$seq.rtvol
}

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

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here

_supported_fs xfs
# Note that we don't _require_realtime because we synthesize a rt volume
# below.
_require_test
_require_xfs_debug
_require_test_program "punch-alternating"
_require_xfs_io_error_injection "reduce_max_iextents"
_require_xfs_io_error_injection "bmap_alloc_minlen_extent"
_require_scratch_nocheck

echo "* Test extending rt inodes"

_scratch_mkfs | _filter_mkfs >> $seqres.full 2> $tmp.mkfs
. $tmp.mkfs

echo "Create fake rt volume"
nr_bitmap_blks=25
nr_bits=$((nr_bitmap_blks * dbsize * 8))

# Realtime extent size has to be atleast 4k in size.
if (( $dbsize < 4096 )); then
	rtextsz=4096
else
	rtextsz=$dbsize
fi

rtdevsz=$((nr_bits * rtextsz))
truncate -s $rtdevsz $TEST_DIR/$seq.rtvol
rtdev=$(_create_loop_device $TEST_DIR/$seq.rtvol)

echo "Format and mount rt volume"

export USE_EXTERNAL=yes
export SCRATCH_RTDEV=$rtdev
_scratch_mkfs -d size=$((1024 * 1024 * 1024)) -b size=${dbsize} \
	      -r size=${rtextsz},extsize=${rtextsz} >> $seqres.full
_try_scratch_mount || _notrun "Couldn't mount fs with synthetic rt volume"

echo "Consume free space"
fillerdir=$SCRATCH_MNT/fillerdir
nr_free_blks=$(stat -f -c '%f' $SCRATCH_MNT)
nr_free_blks=$((nr_free_blks * 90 / 100))

_fill_fs $((dbsize * nr_free_blks)) $fillerdir $dbsize 0 >> $seqres.full 2>&1

echo "Create fragmented filesystem"
for dentry in $(ls -1 $fillerdir/); do
	$here/src/punch-alternating $fillerdir/$dentry >> $seqres.full
done

echo "Inject reduce_max_iextents error tag"
_scratch_inject_error reduce_max_iextents 1

echo "Inject bmap_alloc_minlen_extent error tag"
_scratch_inject_error bmap_alloc_minlen_extent 1

echo "Grow realtime volume"
$XFS_GROWFS_PROG -r $SCRATCH_MNT >> $seqres.full 2>&1
if [[ $? == 0 ]]; then
	echo "Growfs succeeded; should have failed."
	exit 1
fi

_scratch_unmount >> $seqres.full

echo "Verify rbmino's and rsumino's extent count"
for rtino in rbmino rsumino; do
	ino=$(_scratch_xfs_get_metadata_field $rtino "sb 0")
	echo "$rtino = $ino" >> $seqres.full

	nextents=$(_scratch_get_iext_count $ino data || \
			_fail "Unable to obtain inode fork's extent count")
	if (( $nextents > 10 )); then
		echo "Extent count overflow check failed: nextents = $nextents"
		exit 1
	fi
done

echo "Check filesystem"
_check_scratch_fs

losetup -d $rtdev
rm -f $TEST_DIR/$seq.rtvol

# success, all done
status=0
exit