Re: [xfstests PATCH v2 2/3] ext4: allow ext4 to use $SCRATCH_LOGDEV

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On Tue, May 09, 2017 at 12:12:44PM -0400, Jeff Layton wrote:
> The writeback error handling test requires that you put the journal on a
> separate device. This allows us to use dmerror to simulate data
> writeback failure, without affecting the journal.
> 
> xfs already has infrastructure for this (a'la $SCRATCH_LOGDEV), so wire
> up the ext4 code so that it can do the same thing when _scratch_mkfs is
> called.
> 
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

--D

> ---
>  common/rc | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/common/rc b/common/rc
> index 257b1903359d..8b815d9c8c33 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -675,6 +675,9 @@ _scratch_mkfs_ext4()
>  	local tmp=`mktemp`
>  	local mkfs_status
>  
> +	[ "$USE_EXTERNAL" = yes -a ! -z "$SCRATCH_LOGDEV" ] && \
> +	    $mkfs_cmd -O journal_dev $SCRATCH_LOGDEV && \
> +	    mkfs_cmd="$mkfs_cmd -J device=$SCRATCH_LOGDEV"
>  
>  	_scratch_do_mkfs "$mkfs_cmd" "$mkfs_filter" $* 2>$tmp.mkfserr 1>$tmp.mkfsstd
>  	mkfs_status=$?
> -- 
> 2.9.3
> 
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