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md: convert conf->chunk_size and conf->prev_chunk to sectors. 

This kills some more shifts.

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Andre Noll 2009-06-18 08:45:55 +10:00 committed by NeilBrown
parent 664e7c413f
commit 09c9e5fa1b
2 changed files with 17 additions and 16 deletions
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27
drivers/md/raid5.c
View File

@ -1274,8 +1274,8 @@ static sector_t raid5_compute_sector(raid5_conf_t *conf, sector_t r_sector,
sector_t new_sector;
int algorithm = previous ? conf->prev_algo
: conf->algorithm;
int sectors_per_chunk = previous ? (conf->prev_chunk >> 9)
: (conf->chunk_size >> 9);
int sectors_per_chunk = previous ? conf->prev_chunk_sectors
: conf->chunk_sectors;
int raid_disks = previous ? conf->previous_raid_disks
: conf->raid_disks;
int data_disks = raid_disks - conf->max_degraded;
@ -1480,8 +1480,8 @@ static sector_t compute_blocknr(struct stripe_head *sh, int i, int previous)
int raid_disks = sh->disks;
int data_disks = raid_disks - conf->max_degraded;
sector_t new_sector = sh->sector, check;
int sectors_per_chunk = previous ? (conf->prev_chunk >> 9)
: (conf->chunk_size >> 9);
int sectors_per_chunk = previous ? conf->prev_chunk_sectors
: conf->chunk_sectors;
int algorithm = previous ? conf->prev_algo
: conf->algorithm;
sector_t stripe;
@ -1997,8 +1997,7 @@ static void stripe_set_idx(sector_t stripe, raid5_conf_t *conf, int previous,
struct stripe_head *sh)
{
int sectors_per_chunk =
previous ? (conf->prev_chunk >> 9)
: (conf->chunk_size >> 9);
previous ? conf->prev_chunk_sectors : conf->chunk_sectors;
int dd_idx;
int chunk_offset = sector_div(stripe, sectors_per_chunk);
int disks = previous ? conf->previous_raid_disks : conf->raid_disks;
@ -3917,7 +3916,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped
1, &dd_idx, NULL);
last_sector =
raid5_compute_sector(conf, ((stripe_addr+reshape_sectors)
*(new_data_disks) - 1),
* new_data_disks - 1),
1, &dd_idx, NULL);
if (last_sector >= mddev->dev_sectors)
last_sector = mddev->dev_sectors - 1;
@ -4403,7 +4402,7 @@ static raid5_conf_t *setup_conf(mddev_t *mddev)
conf->fullsync = 1;
}
conf->chunk_size = mddev->new_chunk_sectors << 9;
conf->chunk_sectors = mddev->new_chunk_sectors;
conf->level = mddev->new_level;
if (conf->level == 6)
conf->max_degraded = 2;
@ -4413,7 +4412,7 @@ static raid5_conf_t *setup_conf(mddev_t *mddev)
conf->max_nr_stripes = NR_STRIPES;
conf->reshape_progress = mddev->reshape_position;
if (conf->reshape_progress != MaxSector) {
conf->prev_chunk = mddev->chunk_sectors << 9;
conf->prev_chunk_sectors = mddev->chunk_sectors;
conf->prev_algo = mddev->layout;
}
@ -4931,8 +4930,8 @@ static int raid5_start_reshape(mddev_t *mddev)
spin_lock_irq(&conf->device_lock);
conf->previous_raid_disks = conf->raid_disks;
conf->raid_disks += mddev->delta_disks;
conf->prev_chunk = conf->chunk_size;
conf->chunk_size = mddev->new_chunk_sectors << 9;
conf->prev_chunk_sectors = conf->chunk_sectors;
conf->chunk_sectors = mddev->new_chunk_sectors;
conf->prev_algo = conf->algorithm;
conf->algorithm = mddev->new_layout;
if (mddev->delta_disks < 0)
@ -5014,7 +5013,7 @@ static void end_reshape(raid5_conf_t *conf)
*/
{
int data_disks = conf->raid_disks - conf->max_degraded;
int stripe = data_disks * (conf->chunk_size
int stripe = data_disks * ((conf->chunk_sectors << 9)
/ PAGE_SIZE);
if (conf->mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
conf->mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
@ -5059,7 +5058,7 @@ static void raid5_finish_reshape(mddev_t *mddev)
raid5_remove_disk(mddev, d);
}
mddev->layout = conf->algorithm;
mddev->chunk_sectors = conf->chunk_size >> 9;
mddev->chunk_sectors = conf->chunk_sectors;
mddev->reshape_position = MaxSector;
mddev->delta_disks = 0;
}
@ -5187,7 +5186,7 @@ static int raid5_reconfig(mddev_t *mddev, int new_layout, int new_chunk)
mddev->layout = mddev->new_layout = new_layout;
}
if (new_chunk > 0) {
conf->chunk_size = new_chunk;
conf->chunk_sectors = new_chunk >> 9;
mddev->new_chunk_sectors = new_chunk >> 9;
mddev->chunk_sectors = new_chunk >> 9;
}

6
drivers/md/raid5.h
View File

@ -334,7 +334,8 @@ struct raid5_private_data {
struct hlist_head *stripe_hashtbl;
mddev_t *mddev;
struct disk_info *spare;
int chunk_size, level, algorithm;
int chunk_sectors;
int level, algorithm;
int max_degraded;
int raid_disks;
int max_nr_stripes;
@ -350,7 +351,8 @@ struct raid5_private_data {
*/
sector_t reshape_safe;
int previous_raid_disks;
int prev_chunk, prev_algo;
int prev_chunk_sectors;
int prev_algo;
short generation; /* increments with every reshape */
unsigned long reshape_checkpoint; /* Time we last updated
* metadata */