diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid10.c | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 70356c130273..5b886218110e 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -324,11 +324,13 @@ static void raid10_end_read_request(struct bio *bio, int error) int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); struct r10bio *r10_bio = bio->bi_private; int slot, dev; + struct md_rdev *rdev; struct r10conf *conf = r10_bio->mddev->private; slot = r10_bio->read_slot; dev = r10_bio->devs[slot].devnum; + rdev = r10_bio->devs[slot].rdev; /* * this branch is our 'one mirror IO has finished' event handler: */ @@ -346,7 +348,7 @@ static void raid10_end_read_request(struct bio *bio, int error) */ set_bit(R10BIO_Uptodate, &r10_bio->state); raid_end_bio_io(r10_bio); - rdev_dec_pending(conf->mirrors[dev].rdev, conf->mddev); + rdev_dec_pending(rdev, conf->mddev); } else { /* * oops, read error - keep the refcount on the rdev @@ -355,7 +357,7 @@ static void raid10_end_read_request(struct bio *bio, int error) printk_ratelimited(KERN_ERR "md/raid10:%s: %s: rescheduling sector %llu\n", mdname(conf->mddev), - bdevname(conf->mirrors[dev].rdev->bdev, b), + bdevname(rdev->bdev, b), (unsigned long long)r10_bio->sector); set_bit(R10BIO_ReadError, &r10_bio->state); reschedule_retry(r10_bio); @@ -599,7 +601,7 @@ static struct md_rdev *read_balance(struct r10conf *conf, int sectors = r10_bio->sectors; int best_good_sectors; sector_t new_distance, best_dist; - struct md_rdev *rdev; + struct md_rdev *rdev, *best_rdev; int do_balance; int best_slot; @@ -608,6 +610,7 @@ static struct md_rdev *read_balance(struct r10conf *conf, retry: sectors = r10_bio->sectors; best_slot = -1; + best_rdev = NULL; best_dist = MaxSector; best_good_sectors = 0; do_balance = 1; @@ -629,10 +632,16 @@ retry: if (r10_bio->devs[slot].bio == IO_BLOCKED) continue; disk = r10_bio->devs[slot].devnum; - rdev = rcu_dereference(conf->mirrors[disk].rdev); + rdev = rcu_dereference(conf->mirrors[disk].replacement); + if (rdev == NULL || test_bit(Faulty, &rdev->flags) || + r10_bio->devs[slot].addr + sectors > rdev->recovery_offset) + rdev = rcu_dereference(conf->mirrors[disk].rdev); if (rdev == NULL) continue; - if (!test_bit(In_sync, &rdev->flags)) + if (test_bit(Faulty, &rdev->flags)) + continue; + if (!test_bit(In_sync, &rdev->flags) && + r10_bio->devs[slot].addr + sectors > rdev->recovery_offset) continue; dev_sector = r10_bio->devs[slot].addr; @@ -657,6 +666,7 @@ retry: if (good_sectors > best_good_sectors) { best_good_sectors = good_sectors; best_slot = slot; + best_rdev = rdev; } if (!do_balance) /* Must read from here */ @@ -685,16 +695,15 @@ retry: if (new_distance < best_dist) { best_dist = new_distance; best_slot = slot; + best_rdev = rdev; } } - if (slot == conf->copies) + if (slot >= conf->copies) { slot = best_slot; + rdev = best_rdev; + } if (slot >= 0) { - disk = r10_bio->devs[slot].devnum; - rdev = rcu_dereference(conf->mirrors[disk].rdev); - if (!rdev) - goto retry; atomic_inc(&rdev->nr_pending); if (test_bit(Faulty, &rdev->flags)) { /* Cannot risk returning a device that failed @@ -990,6 +999,7 @@ read_again: max_sectors); r10_bio->devs[slot].bio = read_bio; + r10_bio->devs[slot].rdev = rdev; read_bio->bi_sector = r10_bio->devs[slot].addr + rdev->data_offset; @@ -2088,10 +2098,9 @@ static int narrow_write_error(struct r10bio *r10_bio, int i) static void handle_read_error(struct mddev *mddev, struct r10bio *r10_bio) { int slot = r10_bio->read_slot; - int mirror = r10_bio->devs[slot].devnum; struct bio *bio; struct r10conf *conf = mddev->private; - struct md_rdev *rdev; + struct md_rdev *rdev = r10_bio->devs[slot].rdev; char b[BDEVNAME_SIZE]; unsigned long do_sync; int max_sectors; @@ -2109,7 +2118,7 @@ static void handle_read_error(struct mddev *mddev, struct r10bio *r10_bio) fix_read_error(conf, mddev, r10_bio); unfreeze_array(conf); } - rdev_dec_pending(conf->mirrors[mirror].rdev, mddev); + rdev_dec_pending(rdev, mddev); bio = r10_bio->devs[slot].bio; bdevname(bio->bi_bdev, b); @@ -2144,6 +2153,7 @@ read_more: r10_bio->sector - bio->bi_sector, max_sectors); r10_bio->devs[slot].bio = bio; + r10_bio->devs[slot].rdev = rdev; bio->bi_sector = r10_bio->devs[slot].addr + rdev->data_offset; bio->bi_bdev = rdev->bdev; |