Re: [PATCH v2] Count journal size in test 289

[Eric Sandeen <sandeen@sandeen.net>]

On 3/20/13 5:50 AM, Jan Kara wrote:
> Test 289 ignored the fact that historically journal is not accounted as
> fs overhead in ext3. For larger filesystems it is hidden in 1% tolerance
> but for filesystems smaller than 12G the test fails. So make the
> counting precise to work everywhere.
> 
> CC: Eric Sandeen <sandeen@sandeen.net>
> Signed-off-by: Jan Kara <jack@suse.cz>

Looks fine, thanks.

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


p.s. - sorry, didn't catch this the first time:

_filter_size_to_bytes won't work for lowercase units, which might
be nice.  How about:

> +	case $suffix in
> +		k|K) mul=1024 ;;
> +		m|M) mul=$((1024*1024)) ;;
> +		g|G) mul=$((1024*1024*1024)) ;;
> +		t|T) mul=$((1024*1024*1024*1024)) ;;
> +	esac

SGI guys - maybe could do that as a small fix-up on commit.  Otherwise, if anyone
ever needs lower case they could just add it at the same time, so no big deal.

-Eric

> ---
>  289           |   16 ++++++++++++----
>  common.filter |   15 +++++++++++++++
>  2 files changed, 27 insertions(+), 4 deletions(-)
> 
> diff --git a/289 b/289
> index b057c20..eb5c63b 100755
> --- a/289
> +++ b/289
> @@ -59,10 +59,18 @@ TOTAL_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
>  FREE_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
>  		| awk '/Free blocks:/{print $3}'`
>  
> -# nb: kernels today don't count journal blocks  as overhead, but should.
> -# For most filesystems this will still be within tolerance.
> -# Overhead is all the blocks (already) used by the fs itself:
> -OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS))
> +# ext3 doesn't count journal blocks as overhead, ext4 does.
> +if [ $FSTYP = "ext3" ]; then
> +	JOURNAL_SIZE=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
> +		| awk '/Journal size:/{print $3}' | _filter_size_to_bytes`
> +	BLOCK_SIZE=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
> +		| awk '/Block size:/{print $3}'`
> +	JOURNAL_BLOCKS=$(($JOURNAL_SIZE/$BLOCK_SIZE))
> +else
> +	JOURNAL_BLOCKS=0
> +fi
> +
> +OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS-$JOURNAL_BLOCKS))
>  
>  #  bsddf|minixdf
>  #         Set the behaviour  for  the  statfs  system  call.  The  minixdf
> diff --git a/common.filter b/common.filter
> index f0f6076..fcd7589 100644
> --- a/common.filter
> +++ b/common.filter
> @@ -229,5 +229,20 @@ _filter_spaces()
>         sed -e 's/ [ ]*/ /g'
>  }
>  
> +# Convert string read from stdin like 128K to bytes and print it to stdout
> +_filter_size_to_bytes()
> +{
> +	read size
> +	suffix=${size:${#size}-1}
> +	mul=1
> +	case $suffix in
> +		K) mul=1024 ;;
> +		M) mul=$((1024*1024)) ;;
> +		G) mul=$((1024*1024*1024)) ;;
> +		T) mul=$((1024*1024*1024*1024)) ;;
> +	esac
> +	echo $((${size:0:${#size}-1}*$mul))
> +}
> +
>  # make sure this script returns success
>  /bin/true
> 

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