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| author | Christoph Hellwig <hch@lst.de> | 2026-01-26 08:53:32 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-01-28 15:16:39 +0300 |
| commit | fa0bdd45d7e3703826ea75f5fe3359865d75c319 (patch) | |
| tree | 9631195c82427a61778bc56cced354bf26bc1b26 /block/blk-lib.c | |
| parent | 7c746eb71fc3737340c32f44c31b111f74f5632c (diff) | |
| download | linux-fa0bdd45d7e3703826ea75f5fe3359865d75c319.tar.xz | |
block: add a BIO_MAX_SIZE constant and use it
Currently the only constant for the maximum bio size is BIO_MAX_SECTORS,
which is in units of 512-byte sectors, but a lot of user need a byte
limit.
Add a BIO_MAX_SIZE constant, redefine BIO_MAX_SECTORS in terms of it, and
switch all bio-related uses of UINT_MAX for the maximum size to use the
symbolic names instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-lib.c')
| -rw-r--r-- | block/blk-lib.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c index 9e2cc58f881f..0be3acdc3eb5 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -32,7 +32,7 @@ static sector_t bio_discard_limit(struct block_device *bdev, sector_t sector) * Align the bio size to the discard granularity to make splitting the bio * at discard granularity boundaries easier in the driver if needed. */ - return round_down(UINT_MAX, discard_granularity) >> SECTOR_SHIFT; + return round_down(BIO_MAX_SIZE, discard_granularity) >> SECTOR_SHIFT; } struct bio *blk_alloc_discard_bio(struct block_device *bdev, @@ -107,8 +107,7 @@ static sector_t bio_write_zeroes_limit(struct block_device *bdev) { sector_t bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1; - return min(bdev_write_zeroes_sectors(bdev), - (UINT_MAX >> SECTOR_SHIFT) & ~bs_mask); + return min(bdev_write_zeroes_sectors(bdev), BIO_MAX_SECTORS & ~bs_mask); } /* @@ -337,8 +336,8 @@ int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector, int ret = 0; /* make sure that "len << SECTOR_SHIFT" doesn't overflow */ - if (max_sectors > UINT_MAX >> SECTOR_SHIFT) - max_sectors = UINT_MAX >> SECTOR_SHIFT; + if (max_sectors > BIO_MAX_SECTORS) + max_sectors = BIO_MAX_SECTORS; max_sectors &= ~bs_mask; if (max_sectors == 0) |