[sheepdog] [PATCH 2/2] sbd: forbid to attach read-only snapshot

[Liu Yuan]

On Fri, May 30, 2014 at 02:37:18PM +0800, Liu Yuan wrote:
> From: Liu Yuan <tailai.ly at taobao.com>
> 
> Signed-off-by: Liu Yuan <namei.unix at gmail.com>
> ---
>  sbd/sheep.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/sbd/sheep.c b/sbd/sheep.c
> index b1cbbfb..56b6e23 100644
> --- a/sbd/sheep.c
> +++ b/sbd/sheep.c
> @@ -255,6 +255,14 @@ int sheep_setup_vdi(struct sbd_device *dev)
>  		pr_err("Cannot read inode for %s, %d\n", dev->vdi.name, ret);
>  		goto out_release;
>  	}
> +
> +	if (vdi_is_snapshot(inode)) {
> +		pr_err("%s: don't support to add snapshot %s\n", DRV_NAME,
> +		       dev->vdi.name);
> +		ret = -EINVAL;
> +		goto out_release;
> +	}
> +
>  	dev->vdi.inode = inode;
>  	pr_info("%s: Associated to %s\n", DRV_NAME, inode->name);
>  	return 0;
> -- 
> 1.8.1.2
> 

Applied

Yuan