Re: [PATCH v2] xfstests: _filter_mkfs should consume input from stdin for non-xfs fs

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On Tue, Nov 12, 2013 at 03:59:18PM +0800, Eryu Guan wrote:
> _filter_mkfs is a filter so that it should read from stdin first
> before printing anything out. Otherwise the command prior to the
> pipeline may get EPIPE.
> 
> I saw this when testing extN with generic/204, _scratch_mkfs_sized was
> unable to create fs because of EPIPE, then _scratch_mount failed.
> 
> generic/204 12s ... [failed, exit status 1] - output mismatch (see /root/xfstests/results//generic/204.out.bad)
>     --- tests/generic/204.out   2013-11-01 16:47:56.728591856 +0800
>     +++ /root/xfstests/results//generic/204.out.bad     2013-11-01 22:52:53.207828779 +0800
>     @@ -1,2 +1,7 @@
>      QA output created by 204
>     -*** done
>     +mount: wrong fs type, bad option, bad superblock on /dev/sda6,
>     +       missing codepage or helper program, or other error
>     +       In some cases useful info is found in syslog - try
>     +       dmesg | tail  or so
>     +
> 
> Signed-off-by: Eryu Guan <eguan@xxxxxxxxxx>
> ---
> v2: just pipe stdin to /dev/null for non-xfs fs as Dave suggested.
> 
>  common/filter | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/common/filter b/common/filter
> index e37ce69..c872a27 100644
> --- a/common/filter
> +++ b/common/filter
> @@ -138,6 +138,7 @@ _filter_mkfs()
>      xfs)
>  	;;
>      *)
> +	cat - >/dev/null
>  	perl -e 'print STDERR "dbsize=4096\nisize=256\n"'
>  	return ;;
>      esac

Looks good.

Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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