[PATCH] xfststs: add a helper to get the minimum dio size

[Eric Sandeen]

On 11/6/13, 4:59 AM, Christoph Hellwig wrote:
> Various tests opencode checks to find out the minimum support direct I/O
> size.  Replace those with a generic helper that handles network filesystems as
> well.  Also remove the Linux 2.4 workaround we had in once place.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

No callers of min_dio_alignment w/o a blockdev right?  But I guess
that fallback is harmless.

Reviewed-by: Eric Sandeen <sandeen at redhat.com>

> diff --git a/common/rc b/common/rc
> index ea3af12..64139c8 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -2179,6 +2179,21 @@ _scale_fsstress_args()
>      echo $args
>  }
>  
> +#
> +# Return the logical block size if running on a block device,
> +# else substitute the page size.
> +#
> +_min_dio_alignment()
> +{
> +    dev=$1
> +
> +    if [ -b "$dev" ]; then
> +        blockdev --getss $dev
> +    else
> +        $here/src/feature -s
> +    fi
> +}
> +
>  run_check()
>  {
>  	echo "# $@" >> $seqres.full 2>&1
> diff --git a/tests/generic/091 b/tests/generic/091
> index cee012d..d0f5800 100755
> --- a/tests/generic/091
> +++ b/tests/generic/091
> @@ -54,11 +54,7 @@ run_fsx()
>  }
>  
>  psize=`$here/src/feature -s`
> -bsize=`blockdev --getss $TEST_DEV`
> -kernel=`uname -r  | sed -e 's/\(2\..\).*/\1/'`
> -
> -# 2.4 Linux kernels support bsize aligned direct I/O only
> -[ "$HOSTOS" = "Linux" -a "$kernel" = "2.4" ] && bsize=$psize
> +bsize=`_min_dio_alignment $TEST_DEV`
>  
>  # fsx usage:
>  # 
> diff --git a/tests/generic/240 b/tests/generic/240
> index e692318..d3fd442 100755
> --- a/tests/generic/240
> +++ b/tests/generic/240
> @@ -60,7 +60,7 @@ rm -f $seqres.full
>  
>  rm -f $TEST_DIR/aiodio_sparse
>  
> -logical_block_size=`blockdev --getss $TEST_DEV`
> +logical_block_size=`_min_dio_alignment $TEST_DEV`
>  fs_block_size=`stat -f $TEST_DIR | grep "Block size:" | awk '{print $3}'`
>  
>  if [ $fs_block_size -le $logical_block_size ]; then
> diff --git a/tests/generic/263 b/tests/generic/263
> index 377b199..094c3d1 100755
> --- a/tests/generic/263
> +++ b/tests/generic/263
> @@ -54,7 +54,7 @@ run_fsx()
>  }
>  
>  psize=`$here/src/feature -s`
> -bsize=`blockdev --getss $TEST_DEV`
> +bsize=`_min_dio_alignment $TEST_DEV`
>  
>  run_fsx -N 10000  -o 8192   -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z
>  run_fsx -N 10000  -o 128000 -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z
> 
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