drivers/md/raid1.c

349 	int mirror;
353 	for (mirror = 0; mirror < raid_disks * 2; mirror++)
354 		if (r1_bio->bios[mirror] == bio)
357 	BUG_ON(mirror == raid_disks * 2);
358 	update_head_pos(mirror, r1_bio);
360 	return mirror;
371 	 * this branch is our 'one mirror IO has finished' event handler:
453 	int mirror = find_bio_disk(r1_bio, bio);
454 	struct md_rdev *rdev = conf->mirrors[mirror].rdev;
461 	 * 'one mirror IO has finished' event handler:
484 			r1_bio->bios[mirror] = NULL;
498 		r1_bio->bios[mirror] = NULL;
515 			r1_bio->bios[mirror] = IO_MADE_GOOD;
547 	if (r1_bio->bios[mirror] == NULL)
727 	struct raid1_info *mirror = &conf->mirrors[disk];
730 	if (!test_bit(Nonrot, &mirror->rdev->flags))
733 	opt_iosize = bdev_io_opt(mirror->rdev->bdev) >> 9;
734 	return opt_iosize > 0 && mirror->seq_start != MaxSector &&
735 	       mirror->next_seq_sect > opt_iosize &&
736 	       mirror->next_seq_sect - opt_iosize >= mirror->seq_start;
1317 	struct raid1_info *mirror;
1361 	mirror = conf->mirrors + rdisk;
1364 		pr_info_ratelimited("md/raid1:%s: redirecting sector %llu to other mirror: %pg\n",
1367 				    mirror->rdev->bdev);
1369 	if (test_bit(WriteMostly, &mirror->rdev->flags)) {
1398 	read_bio = bio_alloc_clone(mirror->rdev->bdev, bio, gfp,
1404 		mirror->rdev->data_offset;
1406 	if (test_bit(FailFast, &mirror->rdev->flags) &&
1415 	atomic_dec(&mirror->rdev->nr_pending);
1923 	int mirror = 0, repl_slot = -1;
1944 	for (mirror = first; mirror <= last; mirror++) {
1945 		p = conf->mirrors + mirror;
1951 			raid1_add_conf(conf, rdev, mirror, false);
1961 			repl_slot = mirror;