linux-kernel - Re: [PATCH 2/2] blk-snap - snapshots and change-tracking for block devices

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Message-ID: <e11c8a85-9d51-2668-53ec-f2795024c762@infradead.org>
Date:   Wed, 21 Oct 2020 08:11:53 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Sergei Shtepa <sergei.shtepa@...am.com>, axboe@...nel.dk,
        viro@...iv.linux.org.uk, hch@...radead.org,
        darrick.wong@...cle.com, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, rjw@...ysocki.net,
        len.brown@...el.com, pavel@....cz, akpm@...ux-foundation.org,
        johannes.thumshirn@....com, ming.lei@...hat.com, jack@...e.cz,
        tj@...nel.org, gustavo@...eddedor.com, bvanassche@....org,
        osandov@...com, koct9i@...il.com, damien.lemoal@....com,
        steve@....org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 2/2] blk-snap - snapshots and change-tracking for block
 devices

On 10/21/20 2:04 AM, Sergei Shtepa wrote:
> diff --git a/drivers/block/blk-snap/Kconfig b/drivers/block/blk-snap/Kconfig
> new file mode 100644
> index 000000000000..7a2db99a80dd
> --- /dev/null
> +++ b/drivers/block/blk-snap/Kconfig
> @@ -0,0 +1,24 @@
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# blk-snap block io layer filter module configuration
> +#
> +#
> +#select BLK_FILTER
> +
> +config BLK_SNAP
> +	tristate "Block device snapshot filter"
> +	depends on BLK_FILTER
> +	help
> +

No blank line here.

> +	  Allow to create snapshots and track block changes for a block

	                                                    for block

> +	  devices. Designed for creating backups for any block devices
> +	  (without device mapper). Snapshots are temporary and are released
> +	  then backup is completed. Change block tracking allows you to

	  when

> +	  create incremental or differential backups.
> +
> +config BLK_SNAP_SNAPSTORE_MULTIDEV
> +	bool "Multi device snapstore configuration support"
> +	depends on BLK_SNAP
> +	help
> +
No blank line here.

> +	  Allow to create snapstore on multiple block devices.


thanks.
-- 
~Randy