On Thu, Dec 26, 2024 at 09:36:31PM +0800, Chao Yu wrote:
> This patch introduce a regression testcase to check whether
> f2fs can handle discard correctly once underlying lvm device
> changes to not support discard after user creates snapshot
> on it.
>
> Related bug was fixed by commit bc8aeb04fd80 ("f2fs: fix to
> drop all discards after creating snapshot on lvm device")
>
> Cc: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
> ---
> v4:
> - use "lvcreate -y" to force wiping stale data in device.
> tests/f2fs/008 | 57 ++++++++++++++++++++++++++++++++++++++++++++++
> tests/f2fs/008.out | 2 ++
> 2 files changed, 59 insertions(+)
> create mode 100755 tests/f2fs/008
> create mode 100644 tests/f2fs/008.out
>
> diff --git a/tests/f2fs/008 b/tests/f2fs/008
> new file mode 100755
> index 00000000..47696f2b
> --- /dev/null
> +++ b/tests/f2fs/008
> @@ -0,0 +1,57 @@
> +#! /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
OK, so you choose "-y" option. I think it's fine, due to this option was
brought in by below commit [1] 11 years ago. It's nearly same old with f2fs :)
So,
Reviewed-by: Zorro Lang <zlang@xxxxxxxxxx>
[1]
commit b6dab4e0598df7b6a44a32749fdb846c03aa692d
Author: Peter Rajnoha <prajnoha@xxxxxxxxxx>
Date: Wed Nov 6 16:16:34 2013 +0100
lv_manip: rename set_lv -> wipe_lv and include signature wiping capability
> +_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
> diff --git a/tests/f2fs/008.out b/tests/f2fs/008.out
> new file mode 100644
> index 00000000..dd68d5a4
> --- /dev/null
> +++ b/tests/f2fs/008.out
> @@ -0,0 +1,2 @@
> +QA output created by 008
> +Silence is golden
> --
> 2.40.1
>
