Re: [PATCH 2/9] btrfs/140: use common read repair helpers

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

On 2022/5/24 15:18, Christoph Hellwig wrote:
> Use the common helpers to find the btrfs logical address and to read from
> a specific mirror.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Reviewed-by: Qu Wenruo <wqu@suse.com>

Thanks,
Qu

> ---
>   tests/btrfs/140 | 13 ++-----------
>   1 file changed, 2 insertions(+), 11 deletions(-)
>
> diff --git a/tests/btrfs/140 b/tests/btrfs/140
> index c680fe0a..fdff6eb2 100755
> --- a/tests/btrfs/140
> +++ b/tests/btrfs/140
> @@ -24,7 +24,6 @@ _supported_fs btrfs
>   _require_scratch_dev_pool 2
>
>   _require_btrfs_command inspect-internal dump-tree
> -_require_command "$FILEFRAG_PROG" filefrag
>   _require_odirect
>   # Overwriting data is forbidden on a zoned block device
>   _require_non_zoned_device "${SCRATCH_DEV}"
> @@ -71,7 +70,7 @@ $XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
>   echo "step 2......corrupt file extent" >>$seqres.full
>
>   ${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar >> $seqres.full
> -logical_in_btrfs=`${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar | _filter_filefrag | cut -d '#' -f 1`
> +logical_in_btrfs=$(_btrfs_get_first_logical $SCRATCH_MNT/foobar)
>   physical=$(get_physical ${logical_in_btrfs} 1)
>   devid=$(get_devid ${logical_in_btrfs} 1)
>   devpath=$(get_device_path ${devid})
> @@ -87,15 +86,7 @@ _scratch_mount
>   # step 3, 128k dio read (this read can repair bad copy)
>   echo "step 3......repair the bad copy" >>$seqres.full
>
> -# since raid1 consists of two copies, and the bad copy was put on stripe #1
> -# while the good copy lies on stripe #0, the bad copy only gets access when the
> -# reader's pid % 2 == 1 is true
> -while true; do
> -	$XFS_IO_PROG -d -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null &
> -	pid=$!
> -	wait
> -	[ $((pid % 2)) == 1 ] && break
> -done
> +_btrfs_direct_read_on_mirror 1 2 "$SCRATCH_MNT/foobar" 0 128K
>
>   _scratch_unmount
>