From: Christoph Hellwig <hch@lst.de>
To: "Pankaj Raghav (Samsung)" <kernel@pankajraghav.com>
Cc: david@fromorbit.com, djwong@kernel.org, chandan.babu@oracle.com,
brauner@kernel.org, akpm@linux-foundation.org,
willy@infradead.org, mcgrof@kernel.org, linux-mm@kvack.org,
hare@suse.de, linux-kernel@vger.kernel.org,
yang@os.amperecomputing.com, Zi Yan <zi.yan@sent.com>,
linux-xfs@vger.kernel.org, p.raghav@samsung.com,
linux-fsdevel@vger.kernel.org, hch@lst.de, gost.dev@samsung.com,
cl@os.amperecomputing.com, john.g.garry@oracle.com
Subject: Re: [PATCH v7 10/11] xfs: make the calculation generic in xfs_sb_validate_fsb_count()
Date: Thu, 13 Jun 2024 10:45:45 +0200 [thread overview]
Message-ID: <20240613084545.GB23371@lst.de> (raw)
In-Reply-To: <20240607145902.1137853-11-kernel@pankajraghav.com>
> + uint64_t max_index;
> + uint64_t max_bytes;
> +
> ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
> ASSERT(sbp->sb_blocklog >= BBSHIFT);
>
> + if (check_shl_overflow(nblocks, sbp->sb_blocklog, &max_bytes))
> + return -EFBIG;
> +
> /* Limited by ULONG_MAX of page cache index */
> - if (nblocks >> (PAGE_SHIFT - sbp->sb_blocklog) > ULONG_MAX)
> + max_index = max_bytes >> PAGE_SHIFT;
> +
> + if (max_index > ULONG_MAX)
Do we really need the max_index variable for a single user here?
Or do you plan to add more uses of it later (can't really think of one
though)?
next prev parent reply other threads:[~2024-06-13 8:45 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-07 14:58 [PATCH v7 00/11] enable bs > ps in XFS Pankaj Raghav (Samsung)
2024-06-07 14:58 ` [PATCH v7 01/11] readahead: rework loop in page_cache_ra_unbounded() Pankaj Raghav (Samsung)
2024-06-07 14:58 ` [PATCH v7 02/11] fs: Allow fine-grained control of folio sizes Pankaj Raghav (Samsung)
2024-06-12 15:38 ` Darrick J. Wong
2024-06-07 14:58 ` [PATCH v7 03/11] filemap: allocate mapping_min_order folios in the page cache Pankaj Raghav (Samsung)
2024-06-12 9:01 ` Hannes Reinecke
2024-06-12 15:40 ` Darrick J. Wong
2024-06-12 17:24 ` Matthew Wilcox
2024-06-13 8:44 ` Christoph Hellwig
2024-06-17 9:58 ` Pankaj Raghav (Samsung)
2024-06-17 12:34 ` Matthew Wilcox
2024-06-07 14:58 ` [PATCH v7 04/11] readahead: allocate folios with mapping_min_order in readahead Pankaj Raghav (Samsung)
2024-06-12 18:50 ` Matthew Wilcox
2024-06-14 9:26 ` Pankaj Raghav (Samsung)
2024-06-17 12:32 ` Matthew Wilcox
2024-06-17 16:04 ` Pankaj Raghav (Samsung)
2024-06-17 16:10 ` Matthew Wilcox
2024-06-17 16:39 ` Pankaj Raghav (Samsung)
2024-06-18 6:56 ` Hannes Reinecke
2024-06-21 12:19 ` Pankaj Raghav (Samsung)
2024-06-21 13:28 ` Hannes Reinecke
2024-06-18 6:52 ` Hannes Reinecke
2024-06-07 14:58 ` [PATCH v7 05/11] mm: split a folio in minimum folio order chunks Pankaj Raghav (Samsung)
2024-06-07 16:58 ` Zi Yan
2024-06-07 17:01 ` Matthew Wilcox
2024-06-07 20:45 ` Pankaj Raghav (Samsung)
2024-06-07 20:30 ` Pankaj Raghav (Samsung)
2024-06-07 20:51 ` Zi Yan
2024-06-10 7:26 ` Pankaj Raghav (Samsung)
2024-06-12 9:02 ` Hannes Reinecke
2024-06-07 14:58 ` [PATCH v7 06/11] filemap: cap PTE range to be created to allowed zero fill in folio_map_range() Pankaj Raghav (Samsung)
2024-06-12 19:08 ` Matthew Wilcox
2024-06-13 7:57 ` Luis Chamberlain
2024-06-13 8:07 ` David Hildenbrand
2024-06-13 8:13 ` Luis Chamberlain
2024-06-13 8:16 ` David Hildenbrand
2024-06-13 15:27 ` Luis Chamberlain
2024-06-13 15:32 ` Matthew Wilcox
2024-06-13 15:38 ` Luis Chamberlain
2024-06-13 15:40 ` Matthew Wilcox
2024-06-13 19:39 ` Luis Chamberlain
2024-06-07 14:58 ` [PATCH v7 07/11] iomap: fix iomap_dio_zero() for fs bs > system page size Pankaj Raghav (Samsung)
2024-06-11 7:38 ` John Garry
2024-06-11 9:41 ` Pankaj Raghav (Samsung)
2024-06-11 10:00 ` John Garry
2024-06-12 20:40 ` Darrick J. Wong
2024-06-17 15:08 ` Pankaj Raghav (Samsung)
2024-06-07 14:58 ` [PATCH v7 08/11] xfs: use kvmalloc for xattr buffers Pankaj Raghav (Samsung)
2024-06-07 14:59 ` [PATCH v7 09/11] xfs: expose block size in stat Pankaj Raghav (Samsung)
2024-06-07 14:59 ` [PATCH v7 10/11] xfs: make the calculation generic in xfs_sb_validate_fsb_count() Pankaj Raghav (Samsung)
2024-06-13 8:45 ` Christoph Hellwig [this message]
2024-06-17 16:09 ` Pankaj Raghav (Samsung)
2024-06-07 14:59 ` [PATCH v7 11/11] xfs: enable block size larger than page size support Pankaj Raghav (Samsung)
2024-06-13 8:47 ` Christoph Hellwig
2024-06-17 1:29 ` Dave Chinner
2024-06-17 6:51 ` Christoph Hellwig
2024-06-17 16:31 ` Pankaj Raghav (Samsung)
2024-06-17 23:18 ` Dave Chinner
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