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Commit b7044d41 authored by NeilBrown's avatar NeilBrown
Browse files

md/raid10: If there is a spare and a want_replacement device, start replacement. 



When attempting to add a spare to a RAID10 array, also consider
adding it as a replacement for a want_replacement device.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 56a2559b

drivers/md/raid10.c

+36 −4
Original line number Diff line number Diff line
@@ -419,6 +419,9 @@ static void raid10_end_write_request(struct bio *bio, int error) 
			md_error(rdev->mddev, rdev);

		else {

			set_bit(WriteErrorSeen,	&rdev->flags);

			if (!test_and_set_bit(WantReplacement, &rdev->flags))

				set_bit(MD_RECOVERY_NEEDED,

					&rdev->mddev->recovery);

			set_bit(R10BIO_WriteError, &r10_bio->state);

			dec_rdev = 0;

		}
@@ -1481,8 +1484,25 @@ static int raid10_add_disk(struct mddev *mddev, struct md_rdev *rdev) 
		struct mirror_info *p = &conf->mirrors[mirror];

		if (p->recovery_disabled == mddev->recovery_disabled)

			continue;

		if (p->rdev)

		if (p->rdev) {

			if (!test_bit(WantReplacement, &p->rdev->flags) ||

			    p->replacement != NULL)

				continue;

			clear_bit(In_sync, &rdev->flags);

			set_bit(Replacement, &rdev->flags);

			rdev->raid_disk = mirror;

			err = 0;

			disk_stack_limits(mddev->gendisk, rdev->bdev,

					  rdev->data_offset << 9);

			if (rdev->bdev->bd_disk->queue->merge_bvec_fn) {

				blk_queue_max_segments(mddev->queue, 1);

				blk_queue_segment_boundary(mddev->queue,

							   PAGE_CACHE_SIZE - 1);

			}

			conf->fullsync = 1;

			rcu_assign_pointer(p->replacement, rdev);

			break;

		}



		disk_stack_limits(mddev->gendisk, rdev->bdev,

				  rdev->data_offset << 9);
@@ -1658,6 +1678,9 @@ static void end_sync_write(struct bio *bio, int error) 
			md_error(mddev, rdev);

		else {

			set_bit(WriteErrorSeen, &rdev->flags);

			if (!test_and_set_bit(WantReplacement, &rdev->flags))

				set_bit(MD_RECOVERY_NEEDED,

					&rdev->mddev->recovery);

			set_bit(R10BIO_WriteError, &r10_bio->state);

		}

	} else if (is_badblock(rdev,
@@ -1852,8 +1875,13 @@ static void fix_recovery_read_error(struct r10bio *r10_bio) 
					  s << 9,

					  bio->bi_io_vec[idx].bv_page,

					  WRITE, false);

			if (!ok)

			if (!ok) {

				set_bit(WriteErrorSeen, &rdev->flags);

				if (!test_and_set_bit(WantReplacement,

						      &rdev->flags))

					set_bit(MD_RECOVERY_NEEDED,

						&rdev->mddev->recovery);

			}

		}

		if (!ok) {

			/* We don't worry if we cannot set a bad block -
@@ -1971,8 +1999,12 @@ static int r10_sync_page_io(struct md_rdev *rdev, sector_t sector, 
	if (sync_page_io(rdev, sector, sectors << 9, page, rw, false))

		/* success */

		return 1;

	if (rw == WRITE)

	if (rw == WRITE) {

		set_bit(WriteErrorSeen, &rdev->flags);

		if (!test_and_set_bit(WantReplacement, &rdev->flags))

			set_bit(MD_RECOVERY_NEEDED,

				&rdev->mddev->recovery);

	}

	/* need to record an error - either for the block or the device */

	if (!rdev_set_badblocks(rdev, sector, sectors, 0))

		md_error(rdev->mddev, rdev);