Checks were in place to return error when a non power-of-2 zoned devices is detected. Remove those checks as non power-of-2 zoned devices are now supported. Relax the zone size constraint to align with a sane default of 1MB. This 1M default has been chosen as the minimum alignment requirement for zone sizes to make sure zones align with sectorsize in different architectures. Reviewed-by: Luis Chamberlain <mcgrof@xxxxxxxxxx> Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx> --- fs/btrfs/zoned.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 3023c871e..a6b15fbe1 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -54,6 +54,13 @@ */ #define BTRFS_MAX_ZONE_SIZE SZ_8G +/* + * A minimum alignment of 1MB is chosen for zoned devices as their zone sizes + * can be non power of 2. This is to make sure the zones correctly align to the + * sectorsize. + */ +#define BTRFS_ZONED_MIN_ALIGN_SECTORS ((u64)SZ_1M >> SECTOR_SHIFT) + #define SUPER_INFO_SECTORS ((u64)BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT) static inline bool sb_zone_is_full(const struct blk_zone *zone) @@ -394,8 +401,8 @@ int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache) zone_sectors = bdev_zone_sectors(bdev); } - /* Check if it's power of 2 (see is_power_of_2) */ - ASSERT(zone_sectors != 0 && (zone_sectors & (zone_sectors - 1)) == 0); + ASSERT(zone_sectors != 0 && + IS_ALIGNED(zone_sectors, BTRFS_ZONED_MIN_ALIGN_SECTORS)); zone_info->zone_size = zone_sectors << SECTOR_SHIFT; /* We reject devices with a zone size larger than 8GB */ @@ -834,9 +841,11 @@ int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, ASSERT(rw == READ || rw == WRITE); - if (!is_power_of_2(bdev_zone_sectors(bdev))) - return -EINVAL; nr_sectors = bdev_nr_sectors(bdev); + + if (!IS_ALIGNED(nr_sectors, BTRFS_ZONED_MIN_ALIGN_SECTORS)) + return -EINVAL; + nr_zones = bdev_zone_no(bdev, nr_sectors); sb_zone = sb_zone_number(bdev, mirror); -- 2.25.1
