diff options
| author | Luis Chamberlain <mcgrof@kernel.org> | 2025-02-22 01:38:22 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-02-24 13:44:44 +0300 |
| commit | 47dd67532303803a87f43195e088b3b4bcf0454d (patch) | |
| tree | b854d8ca23f4521819b8e5c722ee3ac888c89405 /include/linux | |
| parent | 3c20917120ce61f2a123ca0810293872f4c6b5a4 (diff) | |
| download | linux-47dd67532303803a87f43195e088b3b4bcf0454d.tar.xz | |
block/bdev: lift block size restrictions to 64k
We now can support blocksizes larger than PAGE_SIZE, so in theory
we should be able to lift the restriction up to the max supported page
cache order. However bound ourselves to what we can currently validate
and test. Through blktests and fstest we can validate up to 64k today.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20250221223823.1680616-8-mcgrof@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/blkdev.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 248416ecd01c..a97428e8bbbe 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -267,10 +267,16 @@ static inline dev_t disk_devt(struct gendisk *disk) return MKDEV(disk->major, disk->first_minor); } +/* + * We should strive for 1 << (PAGE_SHIFT + MAX_PAGECACHE_ORDER) + * however we constrain this to what we can validate and test. + */ +#define BLK_MAX_BLOCK_SIZE SZ_64K + /* blk_validate_limits() validates bsize, so drivers don't usually need to */ static inline int blk_validate_block_size(unsigned long bsize) { - if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize)) + if (bsize < 512 || bsize > BLK_MAX_BLOCK_SIZE || !is_power_of_2(bsize)) return -EINVAL; return 0; |