Re: [PATCH 2/2] fstests: btrfs/006: Fix false alert due to output change

[Eryu Guan <eguan@redhat.com>]

On Thu, Dec 29, 2016 at 11:14:10PM -0500, Su Yue wrote:
> Btrfs-progs v4.9 changed "device status" output by adding one more
> space, which differs from golden output.
> 
> Fix it by introducing new filter to convert multi space into one.
> 
> Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
> ---
>  common/filter       |  6 ++++++
>  tests/btrfs/006     | 16 ++++++++++++----
>  tests/btrfs/006.out | 24 ++++++++++++------------
>  3 files changed, 30 insertions(+), 16 deletions(-)
> 
> diff --git a/common/filter b/common/filter
> index 397b456..4d5e4d0 100644
> --- a/common/filter
> +++ b/common/filter
> @@ -401,5 +401,11 @@ _filter_mknod()
>  	sed -e "s/mknod: [\`']\(.*\)': File exists/mknod: \1: File exists/"
>  }
>  
> +# Filter spaces into one
> +_filter_spaces()
> +{
> +	sed -e "s/\s\+/ /g"
> +}
> +

There's already one such filter with the same name in common/filter,
does this existing helper work for you?

>  # make sure this script returns success
>  /bin/true
> diff --git a/tests/btrfs/006 b/tests/btrfs/006
> index 0863394..dc9bfb9 100755
> --- a/tests/btrfs/006
> +++ b/tests/btrfs/006
> @@ -82,13 +82,21 @@ echo "== Sync filesystem"
>  $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT > /dev/null
>  
>  echo "== Show device stats by mountpoint"
> -$BTRFS_UTIL_PROG device stats $SCRATCH_MNT | _filter_btrfs_device_stats $TOTAL_DEVS
> +$BTRFS_UTIL_PROG device stats $SCRATCH_MNT | \
> +       	_filter_btrfs_device_stats $TOTAL_DEVS | \

Spaces before tab in above line.

Thanks,
Eryu

> +	_filter_spaces
>  echo "== Show device stats by first/scratch dev"
> -$BTRFS_UTIL_PROG device stats $SCRATCH_DEV | _filter_btrfs_device_stats
> +$BTRFS_UTIL_PROG device stats $SCRATCH_DEV | \
> +	_filter_btrfs_device_stats | \
> +	_filter_spaces
>  echo "== Show device stats by second dev"
> -$BTRFS_UTIL_PROG device stats $FIRST_POOL_DEV | sed -e "s,$FIRST_POOL_DEV,FIRST_POOL_DEV,g"
> +$BTRFS_UTIL_PROG device stats $FIRST_POOL_DEV | \
> +	sed -e "s,$FIRST_POOL_DEV,FIRST_POOL_DEV,g" | \
> +	_filter_spaces
>  echo "== Show device stats by last dev"
> -$BTRFS_UTIL_PROG device stats $LAST_POOL_DEV | sed -e "s,$LAST_POOL_DEV,LAST_POOL_DEV,g"
> +$BTRFS_UTIL_PROG device stats $LAST_POOL_DEV | \
> +	sed -e "s,$LAST_POOL_DEV,LAST_POOL_DEV,g" | \
> +	_filter_spaces
>  
>  # success, all done
>  status=0
> diff --git a/tests/btrfs/006.out b/tests/btrfs/006.out
> index 05b9ac0..a976972 100644
> --- a/tests/btrfs/006.out
> +++ b/tests/btrfs/006.out
> @@ -16,25 +16,25 @@ Label: 'TestLabel.006'  uuid: <EXACTUUID>
>  == Sync filesystem
>  == Show device stats by mountpoint
>  <NUMDEVS> [SCRATCH_DEV].corruption_errs <NUM>
> -<NUMDEVS> [SCRATCH_DEV].flush_io_errs   <NUM>
> +<NUMDEVS> [SCRATCH_DEV].flush_io_errs <NUM>
>  <NUMDEVS> [SCRATCH_DEV].generation_errs <NUM>
> -<NUMDEVS> [SCRATCH_DEV].read_io_errs    <NUM>
> -<NUMDEVS> [SCRATCH_DEV].write_io_errs   <NUM>
> +<NUMDEVS> [SCRATCH_DEV].read_io_errs <NUM>
> +<NUMDEVS> [SCRATCH_DEV].write_io_errs <NUM>
>  == Show device stats by first/scratch dev
>  [SCRATCH_DEV].corruption_errs <NUM>
> -[SCRATCH_DEV].flush_io_errs   <NUM>
> +[SCRATCH_DEV].flush_io_errs <NUM>
>  [SCRATCH_DEV].generation_errs <NUM>
> -[SCRATCH_DEV].read_io_errs    <NUM>
> -[SCRATCH_DEV].write_io_errs   <NUM>
> +[SCRATCH_DEV].read_io_errs <NUM>
> +[SCRATCH_DEV].write_io_errs <NUM>
>  == Show device stats by second dev
> -[FIRST_POOL_DEV].write_io_errs   0
> -[FIRST_POOL_DEV].read_io_errs    0
> -[FIRST_POOL_DEV].flush_io_errs   0
> +[FIRST_POOL_DEV].write_io_errs 0
> +[FIRST_POOL_DEV].read_io_errs 0
> +[FIRST_POOL_DEV].flush_io_errs 0
>  [FIRST_POOL_DEV].corruption_errs 0
>  [FIRST_POOL_DEV].generation_errs 0
>  == Show device stats by last dev
> -[LAST_POOL_DEV].write_io_errs   0
> -[LAST_POOL_DEV].read_io_errs    0
> -[LAST_POOL_DEV].flush_io_errs   0
> +[LAST_POOL_DEV].write_io_errs 0
> +[LAST_POOL_DEV].read_io_errs 0
> +[LAST_POOL_DEV].flush_io_errs 0
>  [LAST_POOL_DEV].corruption_errs 0
>  [LAST_POOL_DEV].generation_errs 0
> -- 
> 2.9.3
> 
> 
> 
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