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md: Make mddev->size sector-based.

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This patch renames the "size" field of struct mddev_s to "dev_sectors"
and stores the number of 512-byte sectors instead of the number of
1K-blocks in it.

All users of that field, including raid levels 1,4-6,10, are adjusted
accordingly. This simplifies the code a bit because it allows to get
rid of a couple of divisions/multiplications by two.

In order to make checkpatch happy, some minor coding style issues
have also been addressed. In particular, size_store() now uses
strict_strtoull() instead of simple_strtoull().

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Andre Noll
2009-03-31 14:33:13 +11:00
committed by NeilBrown
parent 575a80fa4f
commit 58c0fed400
8 changed files with 78 additions and 68 deletions
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24
drivers/md/raid5.c
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@@ -3629,8 +3629,8 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped
*(new_data_disks) -1,
raid_disks, data_disks,
&dd_idx, &pd_idx, conf);
if (last_sector >= (mddev->size<<1))
last_sector = (mddev->size<<1)-1;
if (last_sector >= mddev->dev_sectors)
last_sector = mddev->dev_sectors - 1;
while (first_sector <= last_sector) {
pd_idx = stripe_to_pdidx(first_sector, conf,
conf->previous_raid_disks);
@@ -3670,7 +3670,7 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski
struct stripe_head *sh;
int pd_idx;
int raid_disks = conf->raid_disks;
sector_t max_sector = mddev->size << 1;
sector_t max_sector = mddev->dev_sectors;
int sync_blocks;
int still_degraded = 0;
int i;
@@ -3708,7 +3708,7 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski
*/
if (mddev->degraded >= conf->max_degraded &&
test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
sector_t rv = (mddev->size << 1) - sector_nr;
sector_t rv = mddev->dev_sectors - sector_nr;
*skipped = 1;
return rv;
}
@@ -4146,8 +4146,8 @@ static int run(mddev_t *mddev)
conf->expand_progress = mddev->reshape_position;
/* device size must be a multiple of chunk size */
mddev->size &= ~(mddev->chunk_size/1024 -1);
mddev->resync_max_sectors = mddev->size << 1;
mddev->dev_sectors &= ~(mddev->chunk_size / 512 - 1);
mddev->resync_max_sectors = mddev->dev_sectors;
if (conf->level == 6 && conf->raid_disks < 4) {
printk(KERN_ERR "raid6: not enough configured devices for %s (%d, minimum 4)\n",
@@ -4254,8 +4254,8 @@ static int run(mddev_t *mddev)
mddev->queue->backing_dev_info.congested_data = mddev;
mddev->queue->backing_dev_info.congested_fn = raid5_congested;
mddev->array_sectors = 2 * mddev->size * (conf->previous_raid_disks -
conf->max_degraded);
mddev->array_sectors = mddev->dev_sectors *
(conf->previous_raid_disks - conf->max_degraded);
blk_queue_merge_bvec(mddev->queue, raid5_mergeable_bvec);
@@ -4482,11 +4482,11 @@ static int raid5_resize(mddev_t *mddev, sector_t sectors)
- conf->max_degraded);
set_capacity(mddev->gendisk, mddev->array_sectors);
mddev->changed = 1;
if (sectors/2 > mddev->size && mddev->recovery_cp == MaxSector) {
mddev->recovery_cp = mddev->size << 1;
if (sectors > mddev->dev_sectors && mddev->recovery_cp == MaxSector) {
mddev->recovery_cp = mddev->dev_sectors;
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
}
mddev->size = sectors /2;
mddev->dev_sectors = sectors;
mddev->resync_max_sectors = sectors;
return 0;
}
@@ -4615,7 +4615,7 @@ static void end_reshape(raid5_conf_t *conf)
struct block_device *bdev;
if (!test_bit(MD_RECOVERY_INTR, &conf->mddev->recovery)) {
conf->mddev->array_sectors = 2 * conf->mddev->size *
conf->mddev->array_sectors = conf->mddev->dev_sectors *
(conf->raid_disks - conf->max_degraded);
set_capacity(conf->mddev->gendisk, conf->mddev->array_sectors);
conf->mddev->changed = 1;