From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Andrey Albershteyn <aalbersh@redhat.com>,
fsverity@lists.linux.dev, linux-fsdevel@vger.kernel.org,
linux-xfs@vger.kernel.org, david@fromorbit.com,
ebiggers@kernel.org, hch@lst.de,
Andrey Albershteyn <aalbersh@kernel.org>
Subject: Re: [PATCH RFC 02/29] iomap: introduce iomap_read/write_region interface
Date: Mon, 11 Aug 2025 13:43:37 +0200 [thread overview]
Message-ID: <20250811114337.GA8850@lst.de> (raw)
In-Reply-To: <20250729222252.GJ2672049@frogsfrogsfrogs>
On Tue, Jul 29, 2025 at 03:22:52PM -0700, Darrick J. Wong wrote:
> ...and these sound a lot like filemap_read and iomap_write_iter.
> Why not use those? You'd get readahead for free. Though I guess
> filemap_read cuts off at i_size so maybe that's why this is necessary?
>
> (and by extension, is this why the existing fsverity implementations
> seem to do their own readahead and reading?)
>
> ((and now I guess I see why this isn't done through the regular kiocb
> interface, because then we'd be exposing post-EOF data hiding to
> everyone in the system))
Same thoughts here. It seems like we should just have a beyond-EOF or
fsverity flag for ->read_iter / ->write_iter and consolidate all this
code. That'll also go along nicely with the flag in the writepage_ctx
suggested by Joanne.
next prev parent reply other threads:[~2025-08-11 11:43 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-28 20:30 [PATCH RFC 00/29] fs-verity support for XFS with post EOF merkle tree Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 01/29] iomap: add iomap_writepages_unbound() to write beyond EOF Andrey Albershteyn
2025-07-29 22:07 ` Darrick J. Wong
2025-07-31 15:04 ` Andrey Albershteyn
2025-07-31 18:43 ` Joanne Koong
2025-08-04 11:34 ` Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 02/29] iomap: introduce iomap_read/write_region interface Andrey Albershteyn
2025-07-29 22:22 ` Darrick J. Wong
2025-07-31 15:51 ` Andrey Albershteyn
2025-08-11 11:43 ` Christoph Hellwig [this message]
2025-07-28 20:30 ` [PATCH RFC 03/29] fs: add FS_XFLAG_VERITY for verity files Andrey Albershteyn
2025-07-29 9:53 ` Amir Goldstein
2025-07-29 10:35 ` Andrey Albershteyn
2025-07-29 12:06 ` Amir Goldstein
2025-08-12 7:51 ` Christoph Hellwig
2025-07-28 20:30 ` [PATCH RFC 04/29] fsverity: add per-sb workqueue for post read processing Andrey Albershteyn
2025-08-11 11:45 ` Christoph Hellwig
2025-08-11 17:51 ` Tejun Heo
2025-08-12 7:43 ` Christoph Hellwig
2025-08-12 19:52 ` Tejun Heo
2025-07-28 20:30 ` [PATCH RFC 05/29] fsverity: add tracepoints Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 06/29] fsverity: report validation errors back to the filesystem Andrey Albershteyn
2025-08-11 11:46 ` Christoph Hellwig
2025-08-11 15:31 ` Darrick J. Wong
2025-08-12 7:34 ` Christoph Hellwig
2025-08-12 7:56 ` Christoph Hellwig
2025-07-28 20:30 ` [PATCH RFC 07/29] fsverity: pass super_block to fsverity_enqueue_verify_work Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 08/29] ext4: use a per-superblock fsverity workqueue Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 09/29] f2fs: " Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 10/29] btrfs: " Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 11/29] fsverity: remove system-wide workqueue Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 12/29] fsverity: expose merkle tree geometry to callers Andrey Albershteyn
2025-08-11 11:48 ` Christoph Hellwig
2025-08-11 15:38 ` Darrick J. Wong
2025-08-11 19:06 ` Andrey Albershteyn
2025-08-12 7:42 ` Christoph Hellwig
2025-08-12 19:09 ` Darrick J. Wong
2025-07-28 20:30 ` [PATCH RFC 13/29] iomap: integrate fs-verity verification into iomap's read path Andrey Albershteyn
2025-07-29 23:21 ` Darrick J. Wong
2025-07-31 11:34 ` Andrey Albershteyn
2025-07-31 14:52 ` Darrick J. Wong
2025-07-31 15:01 ` Andrey Albershteyn
2025-07-31 15:08 ` Darrick J. Wong
2025-07-28 20:30 ` [PATCH RFC 14/29] xfs: add attribute type for fs-verity Andrey Albershteyn
2025-08-11 11:50 ` Christoph Hellwig
2025-08-11 19:00 ` Andrey Albershteyn
2025-08-12 7:44 ` Christoph Hellwig
2025-08-12 17:11 ` Andrey Albershteyn
2025-08-12 19:12 ` Darrick J. Wong
2025-07-28 20:30 ` [PATCH RFC 15/29] xfs: add fs-verity ro-compat flag Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 16/29] xfs: add inode on-disk VERITY flag Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 17/29] xfs: initialize fs-verity on file open and cleanup on inode destruction Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 18/29] xfs: don't allow to enable DAX on fs-verity sealed inode Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 19/29] xfs: disable direct read path for fs-verity files Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 20/29] xfs: disable preallocations for fsverity Merkle tree writes Andrey Albershteyn
2025-07-29 22:27 ` Darrick J. Wong
2025-07-31 11:42 ` Andrey Albershteyn
2025-07-31 14:49 ` Darrick J. Wong
2025-07-28 20:30 ` [PATCH RFC 21/29] xfs: add writeback and iomap reading of Merkel tree pages Andrey Albershteyn
2025-07-29 22:33 ` Darrick J. Wong
2025-07-28 20:30 ` [PATCH RFC 22/29] xfs: add fs-verity support Andrey Albershteyn
2025-07-29 23:05 ` Darrick J. Wong
2025-07-31 14:50 ` Andrey Albershteyn
2025-07-31 15:07 ` Darrick J. Wong
2025-07-28 20:30 ` [PATCH RFC 23/29] xfs: add fs-verity ioctls Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 24/29] xfs: advertise fs-verity being available on filesystem Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 25/29] xfs: check and repair the verity inode flag state Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 26/29] xfs: fix scrub trace with null pointer in quotacheck Andrey Albershteyn
2025-07-29 15:28 ` Darrick J. Wong
2025-07-31 14:54 ` Andrey Albershteyn
2025-07-31 16:03 ` Carlos Maiolino
2025-07-28 20:30 ` [PATCH RFC 27/29] xfs: report verity failures through the health system Andrey Albershteyn
2025-07-28 20:30 ` [PATCH RFC 28/29] xfs: add fsverity traces Andrey Albershteyn
2025-07-29 23:06 ` Darrick J. Wong
2025-07-28 20:30 ` [PATCH RFC 29/29] xfs: enable ro-compat fs-verity flag Andrey Albershteyn
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