From: no-reply@sashiko.virtuozzo.com
To: Alexander Ivanov <alexander.ivanov@virtuozzo.com>,
andrey.zhadchenko@virtuozzo.com
Cc: devel@openvz.org
Subject: Re: [Devel] [PATCH hci-8.1 2/3] drivers/md/dm-qcow2: fail writes to a read-only table
Date: Fri, 23 Oct 2026 13:23:39 +0000 [thread overview]
Message-ID: <010701a168ee712d-68731254-345c-4c89-b47c-579c1ae64a13-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20261023132008.2304901-3-alexander.ivanov@virtuozzo.com>
> bio_check_ro() only warns about a write to a read-only disk and lets it
> through. dm-qcow2 then allocates clusters in the top image although
> the table is read-only. The header is not updated for a read-only
> table, so enabled persistent bitmaps stay marked consistent while the
> image data changes under them.
>
> Kill write requests in .clone_and_map when the table is read-only.
>
> https://virtuozzo.atlassian.net/browse/VSTOR-138887
> Feature: dm-qcow2: block device over QCOW2 files driver
>
> Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261023132008.2304901-1-alexander.ivanov@virtuozzo.com?part=2
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next prev parent reply other threads:[~2026-10-23 13:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 13:20 [Devel] [PATCH hci-8.1 0/3] dm-qcow2: keep images of a read-only table unmodified Alexander Ivanov
2026-10-23 13:20 ` [Devel] [PATCH hci-8.1 1/3] drivers/md/dm-qcow2: treat images of a read-only table as read-only Alexander Ivanov
2026-10-23 13:24 ` no-reply
2026-10-29 11:36 ` Konstantin Khorenko
2026-10-23 13:20 ` [Devel] [PATCH hci-8.1 2/3] drivers/md/dm-qcow2: fail writes to a read-only table Alexander Ivanov
2026-10-23 13:23 ` no-reply [this message]
2026-10-28 10:35 ` Andrey Zhadchenko
2026-10-23 13:20 ` [Devel] [PATCH hci-8.1 3/3] drivers/md/dm-qcow2: do not revalidate inconsistent persistent bitmaps Alexander Ivanov
2026-10-23 13:25 ` no-reply
2026-10-23 13:58 ` Alexander Ivanov
2026-10-29 11:39 ` Konstantin Khorenko
2026-10-28 10:47 ` [Devel] [PATCH hci-8.1 0/3] dm-qcow2: keep images of a read-only table unmodified Andrey Zhadchenko
2026-10-29 11:42 ` Konstantin Khorenko
2026-10-29 14:48 ` Alexander Ivanov
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