super_1_load() and super_1_sync() both contain a copy of logic to pad out the superblock size so that it is aligned on a logical block boundary. Factor into new function, and use round_up() rather than explict bitmask-based calculation.
Signed-off-by: Christopher Unkel <cun...@drivescale.com> --- This series replaces the first patch of the previous series (https://lkml.org/lkml/2020/10/22/1058), with the following changes: 1. Creates a helper function super_1_sb_length_ok(). 2. Fixes operator placement style violation. 3. Covers case in super_1_sync(). 4. Refactors duplicate logic. 5. Covers a case in existing code where aligned superblock could run into bitmap. drivers/md/md.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 98bac4f304ae..d6a55ca1d52e 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1646,6 +1646,17 @@ static __le32 calc_sb_1_csum(struct mdp_superblock_1 *sb) return cpu_to_le32(csum); } +/* + * set rdev->sb_size to that required for number of devices in array + * with appropriate padding to underlying sectors + */ +static void +super_1_set_rdev_sb_size(struct md_rdev *rdev, int max_dev) +{ + int sb_size = max_dev * 2 + 256; + rdev->sb_size = round_up(sb_size, bdev_logical_block_size(rdev->bdev)); +} + static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_version) { struct mdp_superblock_1 *sb; @@ -1653,7 +1664,6 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_ sector_t sb_start; sector_t sectors; char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; - int bmask; bool spare_disk = true; /* @@ -1720,10 +1730,7 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_ rdev->new_data_offset += (s32)le32_to_cpu(sb->new_offset); atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read)); - rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256; - bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; - if (rdev->sb_size & bmask) - rdev->sb_size = (rdev->sb_size | bmask) + 1; + super_1_set_rdev_sb_size(rdev, le32_to_cpu(sb->max_dev)); if (minor_version && rdev->data_offset < sb_start + (rdev->sb_size/512)) @@ -2132,12 +2139,8 @@ static void super_1_sync(struct mddev *mddev, struct md_rdev *rdev) max_dev = rdev2->desc_nr+1; if (max_dev > le32_to_cpu(sb->max_dev)) { - int bmask; sb->max_dev = cpu_to_le32(max_dev); - rdev->sb_size = max_dev * 2 + 256; - bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1; - if (rdev->sb_size & bmask) - rdev->sb_size = (rdev->sb_size | bmask) + 1; + super_1_set_rdev_sb_size(rdev, max_dev); } else max_dev = le32_to_cpu(sb->max_dev); -- 2.17.1
