[PATCH 5/5] xfs_io: print dedupe errors to stderr, not stdout

[Dave Chinner]

On Fri, Jan 22, 2016 at 04:35:31PM -0800, Darrick J. Wong wrote:
> Signed-off-by: Darrick J. Wong <darrick.wong at oracle.com>
> ---
>  io/reflink.c |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> 
> diff --git a/io/reflink.c b/io/reflink.c
> index def01be..a09e82d 100644
> --- a/io/reflink.c
> +++ b/io/reflink.c
> @@ -78,11 +78,13 @@ dedupe_ioctl(
>  			goto done;
>  		}
>  		if (info->status < 0) {
> -			printf("dedupe: %s\n", _(strerror(-info->status)));
> +			fprintf(stderr, "dedupe: %s\n",
> +					_(strerror(-info->status)));
>  			goto done;
>  		}
>  		if (info->status == XFS_EXTENT_DATA_DIFFERS) {
> -			printf(_("Extents did not match.\n"));
> +			fprintf(stderr, "dedupe: %s\n",
> +					_("Extents did not match."));
>  			goto done;
>  		}
>  		if (args->length != 0 &&

I think this patch breaks dedupe detection in xfstests. I see the
dedupe tests running instead of being detected as not supported, and
all the diffs from test failures contain:

    +dedupe: Invalid argument

This is on 4.5-rc2, so I suspect it's not returning the expected
"not supported" error to xfstests from the ioctl.

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com