diff options
| -rw-r--r-- | drivers/md/raid10.c | 110 |
1 files changed, 80 insertions, 30 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 8a6862be9f58..403f05ac1f2a 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1843,7 +1843,7 @@ static void recovery_request_write(struct mddev *mddev, struct r10bio *r10_bio) { struct r10conf *conf = mddev->private; int d; - struct bio *wbio; + struct bio *wbio, *wbio2; if (!test_bit(R10BIO_Uptodate, &r10_bio->state)) { fix_recovery_read_error(r10_bio); @@ -1855,12 +1855,20 @@ static void recovery_request_write(struct mddev *mddev, struct r10bio *r10_bio) * share the pages with the first bio * and submit the write request */ - wbio = r10_bio->devs[1].bio; d = r10_bio->devs[1].devnum; - - atomic_inc(&conf->mirrors[d].rdev->nr_pending); - md_sync_acct(conf->mirrors[d].rdev->bdev, wbio->bi_size >> 9); - generic_make_request(wbio); + wbio = r10_bio->devs[1].bio; + wbio2 = r10_bio->devs[1].repl_bio; + if (wbio->bi_end_io) { + atomic_inc(&conf->mirrors[d].rdev->nr_pending); + md_sync_acct(conf->mirrors[d].rdev->bdev, wbio->bi_size >> 9); + generic_make_request(wbio); + } + if (wbio2 && wbio2->bi_end_io) { + atomic_inc(&conf->mirrors[d].replacement->nr_pending); + md_sync_acct(conf->mirrors[d].replacement->bdev, + wbio2->bi_size >> 9); + generic_make_request(wbio2); + } } @@ -2590,23 +2598,30 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, sector_t sect; int must_sync; int any_working; - - if (conf->mirrors[i].rdev == NULL || - test_bit(In_sync, &conf->mirrors[i].rdev->flags)) + struct mirror_info *mirror = &conf->mirrors[i]; + + if ((mirror->rdev == NULL || + test_bit(In_sync, &mirror->rdev->flags)) + && + (mirror->replacement == NULL || + test_bit(Faulty, + &mirror->replacement->flags))) continue; still_degraded = 0; /* want to reconstruct this device */ rb2 = r10_bio; sect = raid10_find_virt(conf, sector_nr, i); - /* Unless we are doing a full sync, we only need - * to recover the block if it is set in the bitmap + /* Unless we are doing a full sync, or a replacement + * we only need to recover the block if it is set in + * the bitmap */ must_sync = bitmap_start_sync(mddev->bitmap, sect, &sync_blocks, 1); if (sync_blocks < max_sync) max_sync = sync_blocks; if (!must_sync && + mirror->replacement == NULL && !conf->fullsync) { /* yep, skip the sync_blocks here, but don't assume * that there will never be anything to do here @@ -2676,33 +2691,60 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, bio->bi_end_io = end_sync_read; bio->bi_rw = READ; from_addr = r10_bio->devs[j].addr; - bio->bi_sector = from_addr + - conf->mirrors[d].rdev->data_offset; - bio->bi_bdev = conf->mirrors[d].rdev->bdev; - atomic_inc(&conf->mirrors[d].rdev->nr_pending); - atomic_inc(&r10_bio->remaining); - /* and we write to 'i' */ + bio->bi_sector = from_addr + rdev->data_offset; + bio->bi_bdev = rdev->bdev; + atomic_inc(&rdev->nr_pending); + /* and we write to 'i' (if not in_sync) */ for (k=0; k<conf->copies; k++) if (r10_bio->devs[k].devnum == i) break; BUG_ON(k == conf->copies); - bio = r10_bio->devs[1].bio; - bio->bi_next = biolist; - biolist = bio; - bio->bi_private = r10_bio; - bio->bi_end_io = end_sync_write; - bio->bi_rw = WRITE; to_addr = r10_bio->devs[k].addr; - bio->bi_sector = to_addr + - conf->mirrors[i].rdev->data_offset; - bio->bi_bdev = conf->mirrors[i].rdev->bdev; - r10_bio->devs[0].devnum = d; r10_bio->devs[0].addr = from_addr; r10_bio->devs[1].devnum = i; r10_bio->devs[1].addr = to_addr; + rdev = mirror->rdev; + if (!test_bit(In_sync, &rdev->flags)) { + bio = r10_bio->devs[1].bio; + bio->bi_next = biolist; + biolist = bio; + bio->bi_private = r10_bio; + bio->bi_end_io = end_sync_write; + bio->bi_rw = WRITE; + bio->bi_sector = to_addr + + rdev->data_offset; + bio->bi_bdev = rdev->bdev; + atomic_inc(&r10_bio->remaining); + } else + r10_bio->devs[1].bio->bi_end_io = NULL; + + /* and maybe write to replacement */ + bio = r10_bio->devs[1].repl_bio; + if (bio) + bio->bi_end_io = NULL; + rdev = mirror->replacement; + /* Note: if rdev != NULL, then bio + * cannot be NULL as r10buf_pool_alloc will + * have allocated it. + * So the second test here is pointless. + * But it keeps semantic-checkers happy, and + * this comment keeps human reviewers + * happy. + */ + if (rdev == NULL || bio == NULL || + test_bit(Faulty, &rdev->flags)) + break; + bio->bi_next = biolist; + biolist = bio; + bio->bi_private = r10_bio; + bio->bi_end_io = end_sync_write; + bio->bi_rw = WRITE; + bio->bi_sector = to_addr + rdev->data_offset; + bio->bi_bdev = rdev->bdev; + atomic_inc(&r10_bio->remaining); break; } if (j == conf->copies) { @@ -2720,8 +2762,16 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, for (k = 0; k < conf->copies; k++) if (r10_bio->devs[k].devnum == i) break; - if (!rdev_set_badblocks( - conf->mirrors[i].rdev, + if (!test_bit(In_sync, + &mirror->rdev->flags) + && !rdev_set_badblocks( + mirror->rdev, + r10_bio->devs[k].addr, + max_sync, 0)) + any_working = 0; + if (mirror->replacement && + !rdev_set_badblocks( + mirror->replacement, r10_bio->devs[k].addr, max_sync, 0)) any_working = 0; @@ -2732,7 +2782,7 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, printk(KERN_INFO "md/raid10:%s: insufficient " "working devices for recovery.\n", mdname(mddev)); - conf->mirrors[i].recovery_disabled + mirror->recovery_disabled = mddev->recovery_disabled; } break; |