diff options
Diffstat (limited to 'drivers/md/raid0.c')
| -rw-r--r-- | drivers/md/raid0.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 0d62ad6df21..07ef936afc7 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -55,7 +55,7 @@ static int raid0_congested(void *data, int bits) static int create_strip_zones(mddev_t *mddev) { int i, c, j, err; - sector_t curr_zone_end; + sector_t curr_zone_end, sectors; mdk_rdev_t *smallest, *rdev1, *rdev2, *rdev; struct strip_zone *zone; int cnt; @@ -153,10 +153,9 @@ static int create_strip_zones(mddev_t *mddev) goto abort; } zone->nb_dev = cnt; - zone->sectors = smallest->sectors * cnt; - zone->zone_end = zone->sectors; + zone->zone_end = smallest->sectors * cnt; - curr_zone_end = zone->sectors; + curr_zone_end = zone->zone_end; /* now do the other zones */ for (i = 1; i < conf->nr_strip_zones; i++) @@ -189,11 +188,11 @@ static int create_strip_zones(mddev_t *mddev) } zone->nb_dev = c; - zone->sectors = (smallest->sectors - zone->dev_start) * c; + sectors = (smallest->sectors - zone->dev_start) * c; printk(KERN_INFO "raid0: zone->nb_dev: %d, sectors: %llu\n", - zone->nb_dev, (unsigned long long)zone->sectors); + zone->nb_dev, (unsigned long long)sectors); - curr_zone_end += zone->sectors; + curr_zone_end += sectors; zone->zone_end = curr_zone_end; printk(KERN_INFO "raid0: current zone start: %llu\n", @@ -310,16 +309,22 @@ static int raid0_stop(mddev_t *mddev) return 0; } -/* Find the zone which holds a particular offset */ +/* Find the zone which holds a particular offset + * Update *sectorp to be an offset in that zone + */ static struct strip_zone *find_zone(struct raid0_private_data *conf, - sector_t sector) + sector_t *sectorp) { int i; struct strip_zone *z = conf->strip_zone; + sector_t sector = *sectorp; for (i = 0; i < conf->nr_strip_zones; i++) - if (sector < z[i].zone_end) + if (sector < z[i].zone_end) { + if (i) + *sectorp = sector - z[i-1].zone_end; return z + i; + } BUG(); } @@ -331,7 +336,7 @@ static int raid0_make_request (struct request_queue *q, struct bio *bio) struct strip_zone *zone; mdk_rdev_t *tmp_dev; sector_t chunk; - sector_t sector, rsect; + sector_t sector, rsect, sector_offset; const int rw = bio_data_dir(bio); int cpu; @@ -368,11 +373,11 @@ static int raid0_make_request (struct request_queue *q, struct bio *bio) bio_pair_release(bp); return 0; } - zone = find_zone(conf, sector); + sector_offset = sector; + zone = find_zone(conf, §or_offset); sect_in_chunk = bio->bi_sector & (chunk_sects - 1); { - sector_t x = (zone->sectors + sector - zone->zone_end) - >> chunksect_bits; + sector_t x = sector_offset >> chunksect_bits; sector_div(x, zone->nb_dev); chunk = x; |