tests/f2fs/008

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2024 Oppo.  All Rights Reserved.
#
# FS QA Test No. f2fs/008
#
# This is a regression test to check whether f2fs can handle
# discard correctly once underlying lvm device changes to not
# support discard after user creates snapshot on it.
#

. ./common/preamble
_begin_fstest auto quick rw

_fixed_by_kernel_commit bc8aeb04fd80 \
        "f2fs: fix to drop all discards after creating snapshot on lvm device"

_require_scratch_nolvm
_require_block_device $SCRATCH_DEV
_require_command "$LVM_PROG" lvm

lvname=lv_$seq
vgname=vg_$seq
testfile=$SCRATCH_MNT/testfile

_cleanup()
{
	_unmount $SCRATCH_MNT >>$seqres.full 2>&1
	$LVM_PROG lvremove -ff /dev/mapper/$lvname-snapshot $vgname >>$seqres.full 2>&1
	$LVM_PROG lvremove -ff /dev/mapper/$vgname-$lvname >>$seqres.full 2>&1
	$LVM_PROG vgremove -ff $vgname >>$seqres.full 2>&1
	$LVM_PROG pvremove -ff $SCRATCH_DEV >>$seqres.full 2>&1
	_udev_wait --removed /dev/mapper/$vgname-$lvname
	cd /
	rm -f $tmp.*
}

$LVM_PROG pvcreate -f $SCRATCH_DEV >>$seqres.full 2>&1
$LVM_PROG vgcreate -f $vgname $SCRATCH_DEV >>$seqres.full 2>&1
$LVM_PROG lvcreate -y -L 1024m -n $lvname $vgname >>$seqres.full 2>&1
_udev_wait /dev/mapper/$vgname-$lvname

_mkfs_dev /dev/mapper/$vgname-$lvname >>$seqres.full 2>&1
_mount -o discard /dev/mapper/$vgname-$lvname $SCRATCH_MNT >>$seqres.full 2>&1

dd if=/dev/zero of=$testfile bs=1M count=20 >>$seqres.full 2>&1
sync
rm -f $testfile
sync

# create a snapshot on lvm device
$LVM_PROG lvcreate -L 1024m -s -n $lvname-snapshot /dev/mapper/$vgname-$lvname >>$seqres.full 2>&1

echo "Silence is golden"

status=0
exit