Re: [PATCH v3] fstests: generic/352 should accomodate other pwrite behaviors

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On 8/28/23 12:23 PM, Bill O'Donnell wrote:
> xfs_io pwrite issues a series of block size writes, but there is no
> guarantee that the resulting extent(s) will be singular or contiguous.
> This behavior is acceptable, but the test is flawed in that it expects
> a single extent for a pwrite.
> 
> Modify test to limit pwrite and reflink to a single block.
> 
> Signed-off-by: Bill O'Donnell <bodonnel@xxxxxxxxxx>

This looks good to me, thanks.

Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx>

> ---
>  tests/generic/352     | 10 ++++++----
>  tests/generic/352.out |  6 ++----
>  2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/tests/generic/352 b/tests/generic/352
> index 52ec4850..acc17dac 100755
> --- a/tests/generic/352
> +++ b/tests/generic/352
> @@ -28,14 +28,16 @@ _require_xfs_io_command "fiemap"
>  _scratch_mkfs > /dev/null 2>&1
>  _scratch_mount
>  
> -blocksize=$((128 * 1024))
> +blocksize=$(_get_file_block_size $SCRATCH_MNT)
>  _require_congruent_file_oplen $SCRATCH_MNT $blocksize
>  file="$SCRATCH_MNT/tmp"
>  
>  # Golden output is for $LOAD_FACTOR == 1 case
> +# and assumes a normal blocksize of 4K
>  orig_nr=8192
> -orig_last_extent=$(($orig_nr * $blocksize / 512))
> -orig_end=$(($orig_last_extent + $blocksize / 512 - 1))
> +orig_blocksize=4096
> +orig_last_extent=$(($orig_nr * $orig_blocksize / 512))
> +orig_end=$(($orig_last_extent + $orig_blocksize / 512 - 1))
>  
>  # Real output
>  nr=$(($orig_nr * $LOAD_FACTOR))
> @@ -43,7 +45,7 @@ last_extent=$(($nr * $blocksize / 512))
>  end=$(($last_extent + $blocksize / 512 - 1))
>  
>  # write the initial block for later reflink
> -_pwrite_byte 0xcdcdcdcd 0 $blocksize $file | _filter_xfs_io
> +_pwrite_byte 0xcdcdcdcd 0 $blocksize $file > /dev/null
>  
>  # use reflink to create the rest of the file, whose all extents are all
>  # pointing to the first extent
> diff --git a/tests/generic/352.out b/tests/generic/352.out
> index 4ff66c21..454ff52f 100644
> --- a/tests/generic/352.out
> +++ b/tests/generic/352.out
> @@ -1,5 +1,3 @@
>  QA output created by 352
> -wrote 131072/131072 bytes at offset 0
> -XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -0: [0..2097151]: shared
> -1: [2097152..2097407]: shared|last
> +0: [0..65535]: shared
> +1: [65536..65543]: shared|last




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