Re: [PATCH] xfs: don't allow reflink + realtime filesystems

[Bill O'Donnell <billodo@redhat.com>]

On Wed, Jan 31, 2018 at 04:57:09PM -0800, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> We don't support realtime filesystems with reflink either, so fail
> those mounts.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

Reviewed-by: Bill O'Donnell <billodo@redhat.com>

> ---
>  fs/xfs/xfs_super.c |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index a83a9f0..7aba628 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -1684,6 +1684,13 @@ xfs_fs_fill_super(
>  		}
>  	}
>  
> +	if (xfs_sb_version_hasreflink(&mp->m_sb) && mp->m_sb.sb_rblocks) {
> +		xfs_alert(mp,
> +	"reflink not compatible with realtime device!");
> +		error = -EINVAL;
> +		goto out_filestream_unmount;
> +	}
> +
>  	if (xfs_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) {
>  		xfs_alert(mp,
>  	"reverse mapping btree not compatible with realtime device!");
> --
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