#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Wang Shilong.  All Rights Reserved.
#
# FS QA Test No. btrfs/076
#
# Regression test for btrfs incorrect inode ratio detection.
#

. ./common/preamble
_begin_fstest auto quick compress

# Override the default cleanup function.
_cleanup()
{
	cd /
	rm -fr $tmp
}

# Import common functions.
. ./common/filter
. ./common/defrag

# real QA test starts here
_supported_fs btrfs
_require_test
_require_scratch
_fixed_by_kernel_commit 4bcbb3325513 \
	"Btrfs: fix incorrect compression ratio detection"

# An extent size can be up to BTRFS_MAX_UNCOMPRESSED
max_extent_size=$(( 128 * 1024 ))
if _scratch_btrfs_is_zoned; then
	zone_append_max=$(cat "/sys/block/$(_short_dev $SCRATCH_DEV)/queue/zone_append_max_bytes")
	if [[ $zone_append_max -gt 0 && $zone_append_max -lt $max_extent_size ]]; then
		# Round down to PAGE_SIZE
		max_extent_size=$(( $zone_append_max / 4096 * 4096 ))
	fi
fi
file_size=$(( 10 * 1024 * 1024 ))
expect=$(( (file_size + max_extent_size - 1) / max_extent_size ))

_scratch_mkfs >> $seqres.full 2>&1
_scratch_mount "-o compress=lzo"

$XFS_IO_PROG -f -c "pwrite 0 10M" -c "fsync" \
	$SCRATCH_MNT/data >> $seqres.full 2>&1

res=$(_extent_count $SCRATCH_MNT/data)
if [[ $res -ne $expect ]]; then
	_fail "Expected $expect extents, got $res"
fi

$XFS_IO_PROG -f -c "pwrite 0 $((4096*33))" -c "fsync" \
	$SCRATCH_MNT/data >> $seqres.full 2>&1

$XFS_IO_PROG -f -c "pwrite 0 10M" -c "fsync" \
	$SCRATCH_MNT/data >> $seqres.full 2>&1

res=$(_extent_count $SCRATCH_MNT/data)
if [[ $res -ne $expect ]]; then
	_fail "Expected $expect extents, got $res"
fi

echo "Silence is golden"
status=0
exit