From: Eric Biggers <ebiggers@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Andrey Albershteyn <aalbersh@kernel.org>,
linux-xfs@vger.kernel.org, fsverity@lists.linux.dev,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-btrfs@vger.kernel.org, djwong@kernel.org
Subject: Re: [PATCH v14 11/21] xfs: don't report dio_mem_align and dio_offset_align for fsverity files
Date: Tue, 4 Aug 2026 18:24:53 +0000 [thread overview]
Message-ID: <20260804182453.GA2904385@google.com> (raw)
In-Reply-To: <20260804174347.GC14046@lst.de>
On Tue, Aug 04, 2026 at 07:43:47PM +0200, Christoph Hellwig wrote:
> On Mon, Aug 03, 2026 at 10:08:01PM +0200, Andrey Albershteyn wrote:
> > Sashiko.dev reported that while fsverity files falls back to the
> > buffered IO for Direct I/O, they should not report non-zero values in
> > dio_mem_align and dio_offset_align, meaning it's not supported.
>
> This doesn't make much sense to me. If we didn't want to report
> we'd also want to not set STATX_DIOALIGN | STATX_DIO_READ_ALIGN.
> But in the end there is very little upside of this while adding
> extra special cases.
Zero values in the alignments are defined to mean that DIO is
unsupported; see statx(2). It's right to do that here and also set
STATX_DIOALIGN | STATX_DIO_READ_ALIGN, as that explicitly reports that
DIO is unsupported.
Leaving the attribute flags unset would mean not reporting anything at
all, which could mean DIO either supported or unsupported.
Acked-by: Eric Biggers <ebiggers@kernel.org>
- Eric
next prev parent reply other threads:[~2026-08-04 18:24 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-03 20:07 [PATCH v14 00/21] fs-verity support for XFS with post EOF merkle tree Andrey Albershteyn
2026-08-03 20:07 ` [PATCH v14 01/21] fsverity: report validation errors through fserror to fsnotify Andrey Albershteyn
2026-08-03 20:07 ` [PATCH v14 02/21] fsverity: expose ensure_fsverity_info() Andrey Albershteyn
2026-08-03 20:07 ` [PATCH v14 03/21] fsverity: pass digest size and hash of the all-zeroes block to ->write Andrey Albershteyn
2026-08-03 20:07 ` [PATCH v14 04/21] fsverity: hoist pagecache_read from f2fs/ext4 to fsverity Andrey Albershteyn
2026-08-03 20:07 ` [PATCH v14 05/21] fsverity: improve flushing performance of fsverity_fill_zerohash Andrey Albershteyn
2026-08-04 17:42 ` Christoph Hellwig
2026-08-04 18:37 ` Eric Biggers
2026-08-04 18:57 ` Eric Biggers
2026-08-04 19:00 ` Darrick J. Wong
2026-08-04 18:01 ` Darrick J. Wong
2026-08-04 18:46 ` Matthew Wilcox
2026-08-04 18:56 ` Darrick J. Wong
2026-08-04 19:28 ` Matthew Wilcox
2026-08-03 20:07 ` [PATCH v14 06/21] fsverity: don't allow setting DAX file attribute on fsverity files Andrey Albershteyn
2026-08-04 18:02 ` Darrick J. Wong
2026-08-03 20:07 ` [PATCH v14 07/21] fsverity: hoist statx reporting of fs-verity flag Andrey Albershteyn
2026-08-04 17:39 ` Christoph Hellwig
2026-08-04 18:02 ` Darrick J. Wong
2026-08-03 20:07 ` [PATCH v14 08/21] xfs: introduce fsverity on-disk changes Andrey Albershteyn
2026-08-03 20:07 ` [PATCH v14 09/21] xfs: don't allow to enable DAX on fs-verity sealed inode Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 10/21] xfs: disable direct read path for fs-verity files Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 11/21] xfs: don't report dio_mem_align and dio_offset_align for fsverity files Andrey Albershteyn
2026-08-04 17:43 ` Christoph Hellwig
2026-08-04 17:50 ` Darrick J. Wong
2026-08-04 18:29 ` Eric Biggers
2026-08-04 18:24 ` Eric Biggers [this message]
2026-08-03 20:08 ` [PATCH v14 12/21] xfs: handle fsverity I/O in write/read path Andrey Albershteyn
2026-08-04 18:27 ` Darrick J. Wong
2026-08-03 20:08 ` [PATCH v14 13/21] xfs: use read ioend for fsverity data verification Andrey Albershteyn
2026-08-04 18:36 ` Darrick J. Wong
2026-08-03 20:08 ` [PATCH v14 14/21] xfs: add flags to xfs_free_eofblocks() to pass down to block processing Andrey Albershteyn
2026-08-04 18:18 ` Darrick J. Wong
2026-08-03 20:08 ` [PATCH v14 15/21] xfs: add fs-verity support Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 16/21] xfs: initialize fs-verity on file open Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 17/21] xfs: add fs-verity ioctls Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 18/21] xfs: advertise fs-verity being available on filesystem Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 19/21] xfs: check and repair the verity inode flag state Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 20/21] xfs: introduce health state for corrupted fsverity metadata Andrey Albershteyn
2026-08-03 20:08 ` [PATCH v14 21/21] xfs: enable ro-compat fs-verity flag Andrey Albershteyn
2026-08-04 17:35 ` [PATCH v14 00/21] fs-verity support for XFS with post EOF merkle tree Christoph Hellwig
2026-08-04 17:52 ` Darrick J. Wong
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