Re: [PATCH 5/5] xfs/49[12]: skip pre-lazysbcount filesystems

[Brian Foster <bfoster@redhat.com>]

On Tue, Apr 27, 2021 at 09:09:24PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
> 
> Prior to lazysbcount, the xfs mount code blindly trusted the value of
> the fdblocks counter in the primary super, which means that the kernel
> doesn't detect the fuzzed fdblocks value at all.  V4 is deprecated and
> pre-lazysbcount V4 hasn't been the default for ~14 years, so we'll just
> skip these two tests on those old filesystems.
> 
> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> ---
>  tests/xfs/491 |    5 +++++
>  tests/xfs/492 |    5 +++++
>  2 files changed, 10 insertions(+)
> 
> 
> diff --git a/tests/xfs/491 b/tests/xfs/491
> index 6420202b..9fd0ab56 100755
> --- a/tests/xfs/491
> +++ b/tests/xfs/491
> @@ -36,6 +36,11 @@ _require_scratch
>  
>  echo "Format and mount"
>  _scratch_mkfs > $seqres.full 2>&1
> +
> +# pre-lazysbcount filesystems blindly trust the primary sb fdblocks
> +_check_scratch_xfs_features LAZYSBCOUNT &>/dev/null || \
> +	_notrun "filesystem requires lazysbcount"
> +

Perhaps we should turn this one into a '_require_scratch_xfs_feature
<FEATURE>' helper or some such? Probably not that important for
lazysbcount filtering, but it seems like that might be useful for newer
features going forward.

Brian

>  _scratch_mount >> $seqres.full 2>&1
>  echo "test file" > $SCRATCH_MNT/testfile
>  
> diff --git a/tests/xfs/492 b/tests/xfs/492
> index 522def47..c4b087b5 100755
> --- a/tests/xfs/492
> +++ b/tests/xfs/492
> @@ -36,6 +36,11 @@ _require_scratch
>  
>  echo "Format and mount"
>  _scratch_mkfs > $seqres.full 2>&1
> +
> +# pre-lazysbcount filesystems blindly trust the primary sb fdblocks
> +_check_scratch_xfs_features LAZYSBCOUNT &>/dev/null || \
> +	_notrun "filesystem requires lazysbcount"
> +
>  _scratch_mount >> $seqres.full 2>&1
>  echo "test file" > $SCRATCH_MNT/testfile
>  
>