#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Lakshmipathi.G  All Rights Reserved.
#
# FS QA Test 136
#
# Test btrfs-convert
#
# 1) create ext3 filesystem & populate it.
# 2) upgrade ext3 filesystem to ext4.
# 3) populate data.
# 4) source has combination of non-extent and extent files.
# 5) convert it to btrfs, mount and verify contents.
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 /
	rm -f $tmp.*
}

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

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

# real QA test starts here

# Modify as appropriate.
_supported_fs btrfs
_require_scratch_nocheck

_require_command "$BTRFS_CONVERT_PROG" btrfs-convert
_require_command "$MKFS_EXT4_PROG" mkfs.ext4
_require_command "$E2FSCK_PROG" e2fsck
_require_command "$TUNE2FS_PROG" tune2fs

rm -f $seqres.full

BLOCK_SIZE=`_get_block_size $TEST_DIR`
EXT_MD5SUM="$tmp.ext43"
BTRFS_MD5SUM="$tmp.btrfs"

populate_data(){
	data_path=$1
	mkdir -p $data_path
	args=`_scale_fsstress_args -p 20 -n 100 $FSSTRESS_AVOID -d $data_path`
	echo "Run fsstress $args" >>$seqres.full
	$FSSTRESS_PROG $args >/dev/null 2>&1 &
	fsstress_pid=$!
	wait $fsstress_pid
}

# Create & populate an ext3 filesystem
$MKFS_EXT4_PROG -F -t ext3 -b $BLOCK_SIZE $SCRATCH_DEV > $seqres.full 2>&1 || \
	_notrun "Could not create ext3 filesystem"

# mount and populate non-extent file
mount -t ext3 $SCRATCH_DEV $SCRATCH_MNT
populate_data "$SCRATCH_MNT/ext3_ext4_data/ext3"
_scratch_unmount

# Upgrade it to ext4.
$TUNE2FS_PROG -O extents,uninit_bg,dir_index $SCRATCH_DEV >> $seqres.full 2>&1
# After Conversion, its highly recommended to run e2fsck.
$E2FSCK_PROG -fyD $SCRATCH_DEV >> $seqres.full 2>&1

# mount and populate extent file
mount -t ext4 $SCRATCH_DEV $SCRATCH_MNT
populate_data "$SCRATCH_MNT/ext3_ext4_data/ext4"

# Compute md5 of ext3,ext4 files.
find "$SCRATCH_MNT/ext3_ext4_data" -type f -fprint "$EXT_MD5SUM"
sort "$EXT_MD5SUM" -o "$EXT_MD5SUM"
_scratch_unmount

# Convert non-extent & extent data to btrfs, mount it, verify the data
$BTRFS_CONVERT_PROG $SCRATCH_DEV >> $seqres.full 2>&1 || \
	_fail "btrfs-convert failed"
_try_scratch_mount || _fail "Could not mount new btrfs fs"

# Compute md5 for converted files.
find "$SCRATCH_MNT/ext3_ext4_data" -type f -fprint "$BTRFS_MD5SUM"
sort "$BTRFS_MD5SUM" -o "$BTRFS_MD5SUM"

# Compare two md5sum files.
btrfs_perm=`md5sum "$BTRFS_MD5SUM" | cut -f1 -d' '`
ext_perm=`md5sum "$EXT_MD5SUM" | cut -f1 -d' '`

if [ "$btrfs_perm" != "$ext_perm" ];then
       echo "md5sum mismatch"
fi

# success, all done
echo "Silence is golden"
status=0
exit