#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Fujitsu.  All Rights Reserved.
#
# FS QA Test 352
#
# Test fiemap ioctl on heavily deduped file
#
# This test case will check if reserved extent map searching go
# without problem and return correct SHARED flag.
# Which btrfs will soft lock up and return wrong shared flag.
#
. ./common/preamble
_begin_fstest auto clone fiemap

# Import common functions.
. ./common/filter
. ./common/reflink
. ./common/punch

# real QA test starts here

# Modify as appropriate.
_supported_fs generic
_require_scratch_reflink
_require_xfs_io_command "fiemap"
[ $FSTYP = "bcachefs" ] && _notrun "not supported on bcachefs - bcachefs extents are smaller"

# The size is too small, this will result in an inline extent and then reflink
# will simply be a copy on btrfs, so exclude compression.
 _require_no_compress

_scratch_mkfs > /dev/null 2>&1
_scratch_mount

blocksize=$(_get_file_block_size $SCRATCH_MNT)
_require_congruent_file_oplen $SCRATCH_MNT $blocksize
file="$SCRATCH_MNT/tmp"

# Golden output is for $LOAD_FACTOR == 1 case
# and assumes a normal blocksize of 4K
orig_nr=8192
orig_blocksize=4096
orig_last_extent=$(($orig_nr * $orig_blocksize / 512))
orig_end=$(($orig_last_extent + $orig_blocksize / 512 - 1))

# Real output
nr=$(($orig_nr * $LOAD_FACTOR))
last_extent=$(($nr * $blocksize / 512))
end=$(($last_extent + $blocksize / 512 - 1))

# write the initial block for later reflink
_pwrite_byte 0xcdcdcdcd 0 $blocksize $file > /dev/null

# use reflink to create the rest of the file, whose all extents are all
# pointing to the first extent
for i in $(seq 1 $nr); do
	_reflink_range $file 0 $file $(($i * $blocksize)) $blocksize > /dev/null
done

# then call fiemap on that file to test both the shared flag and if
# reserved extent mapping search will cause soft lockup
$XFS_IO_PROG -c "fiemap -v" $file | _filter_fiemap_flags > $tmp.out
cat $tmp.out >> $seqres.full

# refact the $LOAD_FACTOR to 1 to match the golden output
sed -i -e "s/$(($last_extent - 1))/$(($orig_last_extent - 1))/" \
	-e "s/$last_extent/$orig_last_extent/" \
	-e "s/$end/$orig_end/" $tmp.out
cat $tmp.out

# success, all done
status=0
exit