From: Christoph Hellwig <hch@infradead.org>
To: Eric Biggers <ebiggers@kernel.org>
Cc: Sergei Shtepa <sergei.shtepa@veeam.com>,
axboe@kernel.dk, hch@infradead.org, corbet@lwn.net,
snitzer@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org,
dchinner@redhat.com, willy@infradead.org, dlemoal@kernel.org,
linux@weissschuh.net, jack@suse.cz, ming.lei@redhat.com,
linux-block@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v5 00/11] blksnap - block devices snapshots module
Date: Mon, 12 Jun 2023 22:50:12 -0700 [thread overview]
Message-ID: <ZIgDlA/nMQIMqeLU@infradead.org> (raw)
In-Reply-To: <20230612161911.GA1200@sol.localdomain>
On Mon, Jun 12, 2023 at 09:19:11AM -0700, Eric Biggers wrote:
> On Mon, Jun 12, 2023 at 03:52:17PM +0200, Sergei Shtepa wrote:
> > Hi all.
> >
> > I am happy to offer a improved version of the Block Devices Snapshots
> > Module. It allows to create non-persistent snapshots of any block devices.
> > The main purpose of such snapshots is to provide backups of block devices.
> > See more in Documentation/block/blksnap.rst.
>
> How does blksnap interact with blk-crypto?
>
> I.e., what happens if a bio with a ->bi_crypt_context set is submitted to a
> block device that has blksnap active?
>
> If you are unfamiliar with blk-crypto, please read
> Documentation/block/inline-encryption.rst
>
> It looks like blksnap hooks into the block layer directly, via the new
> "blkfilter" mechanism. I'm concerned that it might ignore ->bi_crypt_context
> and write data to the disk in plaintext, when it is supposed to be encrypted.
Yeah. Same for integrity. I guess for now the best would be to
not allow attaching a filter to block devices that have encryption or
integrity enabled and then look into that as a separate project fully
reviewed by the respective experts.
next prev parent reply other threads:[~2023-06-13 5:50 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-12 13:52 [PATCH v5 00/11] blksnap - block devices snapshots module Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 01/11] documentation: Block Device Filtering Mechanism Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 02/11] block: " Sergei Shtepa
2023-07-11 2:02 ` Yu Kuai
2023-07-12 10:04 ` Yu Kuai
2023-07-12 12:34 ` Yu Kuai
2023-07-17 17:39 ` Sergei Shtepa
2023-07-18 1:21 ` Yu Kuai
2023-07-17 16:22 ` Sergei Shtepa
2023-07-17 14:39 ` Sergei Shtepa
2023-07-18 1:37 ` Yu Kuai
2023-07-18 11:25 ` Sergei Shtepa
2023-07-18 12:32 ` Yu Kuai
2023-07-18 16:33 ` Sergei Shtepa
2023-07-19 7:28 ` Yu Kuai
2023-07-19 8:36 ` Sergei Shtepa
2023-07-20 6:14 ` Christoph Hellwig
2023-06-12 13:52 ` [PATCH v5 03/11] documentation: Block Devices Snapshots Module Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 04/11] blksnap: header file of the module interface Sergei Shtepa
2023-06-13 22:25 ` Dave Chinner
2023-06-14 6:26 ` Christoph Hellwig
2023-06-14 9:26 ` Sergei Shtepa
2023-06-14 14:07 ` Christoph Hellwig
2023-06-14 16:43 ` Sergei Shtepa
2023-06-15 0:08 ` Dave Chinner
2023-07-17 18:57 ` Thomas Weißschuh
2023-07-18 9:53 ` Sergei Shtepa
2023-07-20 6:16 ` Christoph Hellwig
2023-06-12 13:52 ` [PATCH v5 05/11] blksnap: module management interface functions Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 06/11] blksnap: handling and tracking I/O units Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 07/11] blksnap: minimum data storage unit of the original block device Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 08/11] blksnap: difference storage Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 09/11] blksnap: event queue from the " Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 10/11] blksnap: snapshot and snapshot image block device Sergei Shtepa
2023-06-12 13:52 ` [PATCH v5 11/11] blksnap: Kconfig and Makefile Sergei Shtepa
2023-06-12 14:32 ` [PATCH v5 00/11] blksnap - block devices snapshots module Christoph Hellwig
2023-06-12 16:19 ` Eric Biggers
2023-06-13 5:50 ` Christoph Hellwig [this message]
2023-06-13 10:12 ` Sergei Shtepa
2023-06-14 17:22 ` Eric Biggers
-- strict thread matches above, loose matches on Subject: below --
2023-06-12 13:21 Sergei Shtepa
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