diff options
| -rw-r--r-- | drivers/md/raid0.c | 40 | ||||
| -rw-r--r-- | drivers/md/raid0.h | 2 |
2 files changed, 21 insertions, 21 deletions
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 925507e7d673..bb245a6d16c8 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -52,7 +52,6 @@ static int raid0_congested(void *data, int bits) return ret; } - static int create_strip_zones (mddev_t *mddev) { int i, c, j; @@ -158,7 +157,7 @@ static int create_strip_zones (mddev_t *mddev) } zone->nb_dev = cnt; zone->sectors = smallest->sectors * cnt; - zone->zone_start = 0; + zone->zone_end = zone->sectors; current_start = smallest->sectors; curr_zone_start = zone->sectors; @@ -198,14 +197,13 @@ static int create_strip_zones (mddev_t *mddev) printk(KERN_INFO "raid0: zone->nb_dev: %d, sectors: %llu\n", zone->nb_dev, (unsigned long long)zone->sectors); - zone->zone_start = curr_zone_start; + zone->zone_end = curr_zone_start + zone->sectors; curr_zone_start += zone->sectors; current_start = smallest->sectors; printk(KERN_INFO "raid0: current zone start: %llu\n", (unsigned long long)current_start); } - /* Now find appropriate hash spacing. * We want a number which causes most hash entries to cover * at most two strips, but the hash table must be at most @@ -398,6 +396,19 @@ static int raid0_stop (mddev_t *mddev) return 0; } +/* Find the zone which holds a particular offset */ +static struct strip_zone *find_zone(struct raid0_private_data *conf, + sector_t sector) +{ + int i; + struct strip_zone *z = conf->strip_zone; + + for (i = 0; i < conf->nr_strip_zones; i++) + if (sector < z[i].zone_end) + return z + i; + BUG(); +} + static int raid0_make_request (struct request_queue *q, struct bio *bio) { mddev_t *mddev = q->queuedata; @@ -443,22 +454,11 @@ static int raid0_make_request (struct request_queue *q, struct bio *bio) bio_pair_release(bp); return 0; } - - - { - sector_t x = sector >> conf->sector_shift; - sector_div(x, (u32)conf->spacing); - zone = conf->hash_table[x]; - } - - while (sector >= zone->zone_start + zone->sectors) - zone++; - + zone = find_zone(conf, sector); sect_in_chunk = bio->bi_sector & (chunk_sects - 1); - - { - sector_t x = (sector - zone->zone_start) >> chunksect_bits; + sector_t x = (zone->sectors + sector - zone->zone_end) + >> chunksect_bits; sector_div(x, zone->nb_dev); chunk = x; @@ -503,8 +503,8 @@ static void raid0_status (struct seq_file *seq, mddev_t *mddev) seq_printf(seq, "%s/", bdevname( conf->strip_zone[j].dev[k]->bdev,b)); - seq_printf(seq, "] zs=%d ds=%d s=%d\n", - conf->strip_zone[j].zone_start, + seq_printf(seq, "] ze=%d ds=%d s=%d\n", + conf->strip_zone[j].zone_end, conf->strip_zone[j].dev_start, conf->strip_zone[j].sectors); } diff --git a/drivers/md/raid0.h b/drivers/md/raid0.h index 824b12eb1d4f..556666fec3a5 100644 --- a/drivers/md/raid0.h +++ b/drivers/md/raid0.h @@ -3,7 +3,7 @@ struct strip_zone { - sector_t zone_start; /* Zone offset in md_dev (in sectors) */ + sector_t zone_end; /* Start of the next zone (in sectors) */ sector_t dev_start; /* Zone offset in real dev (in sectors) */ sector_t sectors; /* Zone size in sectors */ int nb_dev; /* # of devices attached to the zone */ |