From: Christoph Hellwig <hch@infradead.org>
To: Brian Foster <bfoster@redhat.com>
Cc: linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 4/6] iomap: helper to trim pos/bytes to within folio
Date: Mon, 5 May 2025 02:03:07 -0700 [thread overview]
Message-ID: <aBh-y_qLVZUGxMU_@infradead.org> (raw)
In-Reply-To: <20250430190112.690800-5-bfoster@redhat.com>
On Wed, Apr 30, 2025 at 03:01:10PM -0400, Brian Foster wrote:
> +/* trim pos and bytes to within a given folio */
> +static loff_t iomap_trim_folio_range(struct iomap_iter *iter,
> + struct folio *folio, size_t *offset, u64 *bytes)
> +{
> + loff_t pos = iter->pos;
> + size_t fsize = folio_size(folio);
> +
> + WARN_ON_ONCE(pos < folio_pos(folio) || pos >= folio_pos(folio) + fsize);
Should this be two separate WARN_ON_ONCE calls to see which one
triggered?
> +
> + *offset = offset_in_folio(folio, pos);
> + if (*bytes > fsize - *offset)
> + *bytes = fsize - *offset;
*bytes = min(*bytes, fsize - *offset);
?
Otherwise looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
next prev parent reply other threads:[~2025-05-05 9:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-30 19:01 [PATCH 0/6] iomap: misc buffered write path cleanups and prep Brian Foster
2025-04-30 19:01 ` [PATCH 1/6] iomap: resample iter->pos after iomap_write_begin() calls Brian Foster
2025-05-05 9:00 ` Christoph Hellwig
2025-04-30 19:01 ` [PATCH 2/6] iomap: drop unnecessary pos param from iomap_write_[begin|end] Brian Foster
2025-05-01 22:22 ` Darrick J. Wong
2025-05-05 9:01 ` Christoph Hellwig
2025-04-30 19:01 ` [PATCH 3/6] iomap: drop pos param from __iomap_[get|put]_folio() Brian Foster
2025-05-01 22:22 ` Darrick J. Wong
2025-05-05 9:01 ` Christoph Hellwig
2025-04-30 19:01 ` [PATCH 4/6] iomap: helper to trim pos/bytes to within folio Brian Foster
2025-05-05 9:03 ` Christoph Hellwig [this message]
2025-05-05 14:38 ` Brian Foster
2025-04-30 19:01 ` [PATCH 5/6] iomap: push non-large folio check into get folio path Brian Foster
2025-05-05 9:03 ` Christoph Hellwig
2025-04-30 19:01 ` [PATCH 6/6] iomap: rework iomap_write_begin() to return folio offset and length Brian Foster
2025-05-01 22:22 ` Darrick J. Wong
2025-05-02 13:18 ` Brian Foster
2025-05-02 19:40 ` Darrick J. Wong
2025-05-02 20:00 ` Darrick J. Wong
2025-05-05 14:39 ` Brian Foster
2025-05-05 9:05 ` Christoph Hellwig
2025-05-05 14:39 ` Brian Foster
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