Re: [PATCH v2 2/2] xfs/288: _notrun if xfs_db can't write values into dir or attr

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Tue, Jul 31, 2018 at 01:41:19PM +0800, Zorro Lang wrote:
> Commit b3cf8b72334fd35ef961869506e5a72ab398bc82 help xfs/288 to
> support v5 filesystems testing, but there're still some old
> distributions don't support xfs_db write '-d' option, or can't
> write values into dir/attr of v5 filesystems.
> 
> For compatible with older versions, skip this test on v5 xfs
> if xfs_db write can't write v5 XFS dir/attr.
> 
> Signed-off-by: Zorro Lang <zlang@redhat.com>
> ---
> 
> Hi,
> 
> Xiao found v1 can't work well on xfsprogs-4.9, due to 'write -d' can't
> write vaules into dir/attr of v5 filesystems before xfsprogs-4.13.
> 
> Only check "if write command has -d option" is not enough. So I write
> a function _require_xfs_db_write_da() to make sure current xfs_db
> can write dir/attr (not only on v5, but especially for v5).
> 
> Thanks,
> Zorro
> 
>  common/xfs    | 28 ++++++++++++++++++++++++++++
>  tests/xfs/288 |  1 +
>  2 files changed, 29 insertions(+)
> 
> diff --git a/common/xfs b/common/xfs
> index d971b4a8..95dcfd59 100644
> --- a/common/xfs
> +++ b/common/xfs
> @@ -720,6 +720,34 @@ _require_xfs_db_write_array()
>  	[ $supported -eq 0 ] && _notrun "xfs_db write can't support array"
>  }
>  
> +# Before xfsprogs commit 89baf918(xfs_db: write values into dir/attr blocks and
> +# recalculate CRCs), xfs_db write command can't write invalid data into dir/attr
> +# field of v5 filesystems. For some cases need to write dir/attr (especially crc
> +# enabled), use this _require at first.
> +_require_xfs_db_write_da()
> +{
> +	local inum
> +	local count
> +
> +	_require_scratch
> +
> +	_scratch_mkfs > /dev/null 2>&1
> +	_scratch_mount
> +	mkdir $SCRATCH_MNT/$seq.dir
> +	inum=$(stat -c '%i' $SCRATCH_MNT/$seq.dir)
> +	$SETFATTR_PROG -n "user.testda" \
> +		       -v "$(perl -e "print 'v' x 65536;")" \
> +		       $SCRATCH_MNT/$seq.dir
> +	_scratch_unmount
> +	_scratch_xfs_set_metadata_field "hdr.count" "0" \

Just FYI an upcoming change to the attr block verifier in 4.19 will
break this because it rejects hdr.count == 0.  Can you please set this
to 1 instead of 0?

> +					"inode $inum" "ablock 0" >/dev/null 2>&1
> +	count=$(_scratch_xfs_get_metadata_field "hdr.count" \
> +						"inode $inum" "ablock 0")
> +	if [ "$count" != "0" ]; then

And update the test here?

--D

> +		_notrun "xfs_db write can't write values into dir/attr blocks"
> +	fi
> +}
> +
>  _require_xfs_spaceman_command()
>  {
>  	if [ -z "$1" ]; then
> diff --git a/tests/xfs/288 b/tests/xfs/288
> index f4165b6c..e9589fd5 100755
> --- a/tests/xfs/288
> +++ b/tests/xfs/288
> @@ -35,6 +35,7 @@ _supported_fs xfs
>  _supported_os Linux
>  _require_scratch
>  _require_attrs
> +_require_xfs_db_write_da
>  
>  # get block size ($dbsize) from the mkfs output
>  _scratch_mkfs_xfs 2>/dev/null | _filter_mkfs 2>$tmp.mkfs >/dev/null
> -- 
> 2.14.4
> 
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