From: Josef Bacik <josef@toxicpanda.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Chris Mason <clm@fb.com>, David Sterba <dsterba@suse.com>,
Boris Burkov <boris@bur.io>,
Johannes Thumshirn <Johannes.Thumshirn@wdc.com>,
Naohiro Aota <Naohiro.Aota@wdc.com>,
linux-btrfs@vger.kernel.org
Subject: Re: btrfs: fix corruption caused by partial dio writes v7
Date: Tue, 28 Mar 2023 11:20:14 -0400 [thread overview]
Message-ID: <20230328152014.GA11390@localhost.localdomain> (raw)
In-Reply-To: <20230328051957.1161316-1-hch@lst.de>
On Tue, Mar 28, 2023 at 02:19:46PM +0900, Christoph Hellwig wrote:
> [this is a resend of the series from Boris, with my changes to avoid
> the three-way split in btrfs_extract_ordered_extent inserted in the
> middle]
>
> The final patch in this series ensures that bios submitted by btrfs dio
> match the corresponding ordered_extent and extent_map exactly. As a
> result, there is no hole or deadlock as a result of partial writes, even
> if the write buffer is a partly overlapping mapping of the range being
> written to.
>
> This required a bit of refactoring and setup. Specifically, the zoned
> device code for "extracting" an ordered extent matching a bio could be
> reused with some refactoring to return the new ordered extents after the
> split.
>
>
> Changes since v6:
> - use ERR_CAST
> - clarify a commit log
>
> Changes since v5:
> - avoid three-way splits in btrfs_extract_ordered_extent
You can add
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
to the series. Thanks,
Josef
next prev parent reply other threads:[~2023-03-28 15:22 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-28 5:19 btrfs: fix corruption caused by partial dio writes v7 Christoph Hellwig
2023-03-28 5:19 ` [PATCH 01/11] btrfs: add function to create and return an ordered extent Christoph Hellwig
2023-03-28 5:19 ` [PATCH 02/11] btrfs: pass flags as unsigned long to btrfs_add_ordered_extent Christoph Hellwig
2023-03-28 5:19 ` [PATCH 03/11] btrfs: stash ordered extent in dio_data during iomap dio Christoph Hellwig
2023-03-28 5:19 ` [PATCH 04/11] btrfs: move ordered_extent internal sanity checks into btrfs_split_ordered_extent Christoph Hellwig
2023-03-28 5:19 ` [PATCH 05/11] btrfs: simplify btrfs_extract_ordered_extent Christoph Hellwig
2023-03-28 17:53 ` David Sterba
2023-03-28 5:19 ` [PATCH 06/11] btrfs: simplify btrfs_split_ordered_extent Christoph Hellwig
2023-03-28 5:19 ` [PATCH 07/11] btrfs: fold btrfs_clone_ordered_extent into btrfs_split_ordered_extent Christoph Hellwig
2023-03-28 5:19 ` [PATCH 08/11] btrfs: simplify split_zoned_em Christoph Hellwig
2023-03-28 5:19 ` [PATCH 09/11] btrfs: pass an ordered_extent to btrfs_extract_ordered_extent Christoph Hellwig
2023-03-28 5:19 ` [PATCH 10/11] btrfs: don't split nocow extent_maps in btrfs_extract_ordered_extent Christoph Hellwig
2023-03-28 5:19 ` [PATCH 11/11] btrfs: split partial dio bios before submit Christoph Hellwig
2023-03-28 15:20 ` Josef Bacik [this message]
2023-03-28 18:24 ` btrfs: fix corruption caused by partial dio writes v7 David Sterba
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