Re: [PATCH 1/2] common: check if the scratch device can support 1024 block sizes

["Darrick J. Wong" <djwong@kernel.org>]

On Sun, Oct 22, 2023 at 05:55:28PM -0400, Theodore Ts'o wrote:
> If the scratch device has as logical blocksize larger than 512 --- for
> example, some SSD or HDD's may have a 4k logical blocksize, and so
> will not support a file system with a 1k block size.
> 
> Add a new function, _require_scratch_support_blocksize so we can skip
> tests that use _scratch_mkfs_blocksized with a size less than the
> scratch device's logical block size.
> 
> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
> ---
>  common/rc      | 12 ++++++++++++
>  tests/ext4/055 |  1 +
>  tests/xfs/205  |  1 +
>  tests/xfs/432  |  1 +
>  tests/xfs/516  |  1 +
>  5 files changed, 16 insertions(+)
> 
> diff --git a/common/rc b/common/rc
> index 7f5a9527c..8d7179567 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -1124,6 +1124,9 @@ _scratch_mkfs_blocksized()
>  	if [ $blocksize -lt $(_get_page_size) ]; then
>  		_exclude_scratch_mount_option dax
>  	fi
> +	if [ $blocksize -lt $(blockdev --getss $SCRATCH_DEV) ]; then
> +		_require_scratch_support_blocksize "$blocksize"
> +	fi

This duplicates the logic in _require_scratch_support_blocksize, so I
think you can drop it.

>  
>  	case $FSTYP in
>  	btrfs)
> @@ -4452,6 +4455,15 @@ _get_device_size()
>  	echo $(($(blockdev --getsz $1) >> 1))
>  }
>  
> +_require_scratch_support_blocksize()
> +{
> +	local blocksize=$1
> +
> +	if [ $blocksize -lt $(blockdev --getss $SCRATCH_DEV) ]; then
> +		_notrun "$SCRATCH_DEV does not support a block size of $blocksize."

"block" is a bit vague in this context -- you mean the LBA size, not the
internal physical block size, right?

May I suggest "...does not support an LBA size of $blocksize." ?

--D

> +	fi
> +}
> +
>  # Make sure we actually have dmesg checking set up.
>  _require_check_dmesg()
>  {
> diff --git a/tests/ext4/055 b/tests/ext4/055
> index aa15cfe98..7025f6283 100755
> --- a/tests/ext4/055
> +++ b/tests/ext4/055
> @@ -27,6 +27,7 @@ echo "Silence is golden"
>  
>  # The 1K blocksize is designed for debugfs.
>  _exclude_scratch_mount_option dax
> +_require_scratch_support_blocksize 1024
>  _scratch_mkfs "-F -O quota -b 1024" > $seqres.full 2>&1
>  
>  # Start from 0, fill block 1 with 6，replace the original 2.
> diff --git a/tests/xfs/205 b/tests/xfs/205
> index 104f1f45a..84c099208 100755
> --- a/tests/xfs/205
> +++ b/tests/xfs/205
> @@ -23,6 +23,7 @@ _require_scratch_nocheck
>  unset SCRATCH_RTDEV
>  
>  fsblksz=1024
> +_require_scratch_support_blocksize $fsblksz
>  _scratch_mkfs_xfs -d size=$((32768*fsblksz)) -b size=$fsblksz >> $seqres.full 2>&1
>  _scratch_mount
>  
> diff --git a/tests/xfs/432 b/tests/xfs/432
> index 66315b039..2efa6230b 100755
> --- a/tests/xfs/432
> +++ b/tests/xfs/432
> @@ -50,6 +50,7 @@ echo "Format and mount"
>  # block.  8187 hashes/dablk / 248 dirents/dirblock = ~33 dirblocks per
>  # dablock.  33 dirblocks * 64k mean that we can expand a directory by
>  # 2112k before we have to allocate another da btree block.
> +_require_scratch_support_blocksize 1024
>  _scratch_mkfs -b size=1k -n size=64k > "$seqres.full" 2>&1
>  _scratch_mount >> "$seqres.full" 2>&1
>  
> diff --git a/tests/xfs/516 b/tests/xfs/516
> index 9e1b99317..65fc635dd 100755
> --- a/tests/xfs/516
> +++ b/tests/xfs/516
> @@ -23,6 +23,7 @@ _cleanup()
>  # real QA test starts here
>  _supported_fs xfs
>  _require_scratch_nocheck
> +_require_scratch_support_blocksize 1024
>  
>  # Assume that if we can run scrub on the test dev we can run it on the scratch
>  # fs too.
> -- 
> 2.31.0
>