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Commit 09c9e5fa authored by Andre Noll's avatar Andre Noll Committed by NeilBrown
Browse files

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



This kills some more shifts.

Signed-off-by: default avatarAndre Noll <maan@systemlinux.org>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 664e7c41

drivers/md/raid5.c

+13 −14
Original line number Diff line number Diff line
@@ -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;

		}

drivers/md/raid5.h

+4 −2
Original line number Diff line number Diff line
@@ -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 */