Re: [PATCH 5/6] rbd: remove the ->set_read_only method

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On Tue, Dec 08, 2020 at 05:28:28PM +0100, Christoph Hellwig wrote:
> Now that the hardware read-only state can't be changed by the BLKROSET
> ioctl, the code in this method is not required anymore.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
> Acked-by: Ilya Dryomov <idryomov@xxxxxxxxx>
> Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
> ---
>  drivers/block/rbd.c | 19 -------------------
>  1 file changed, 19 deletions(-)
> 
> diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
> index 2ed79b09439a82..2c64ca15ca079f 100644
> --- a/drivers/block/rbd.c
> +++ b/drivers/block/rbd.c
> @@ -692,29 +692,10 @@ static void rbd_release(struct gendisk *disk, fmode_t mode)
>  	put_device(&rbd_dev->dev);
>  }
>  
> -static int rbd_set_read_only(struct block_device *bdev, bool ro)
> -{
> -	struct rbd_device *rbd_dev = bdev->bd_disk->private_data;
> -
> -	/*
> -	 * Both images mapped read-only and snapshots can't be marked
> -	 * read-write.
> -	 */
> -	if (!ro) {
> -		if (rbd_is_ro(rbd_dev))
> -			return -EROFS;
> -
> -		rbd_assert(!rbd_is_snap(rbd_dev));
> -	}
> -
> -	return 0;
> -}
> -
>  static const struct block_device_operations rbd_bd_ops = {
>  	.owner			= THIS_MODULE,
>  	.open			= rbd_open,
>  	.release		= rbd_release,
> -	.set_read_only		= rbd_set_read_only,
>  };
>  
>  /*
> -- 
> 2.29.2
> 

Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>

-- 
Ming

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