145 	struct mirror *m;  member
166 static void bio_set_m(struct bio *bio, struct mirror *m)  in bio_set_m()  argument
168 	bio->bi_next = (struct bio *) m;  in bio_set_m()
176 static void set_default_mirror(struct mirror *m)  in set_default_mirror()  argument
178 	struct mirror_set *ms = m->ms;  in set_default_mirror()
181 	atomic_set(&ms->default_mirror, m - m0);  in set_default_mirror()
186 	struct mirror *m;  in get_valid_mirror()  local
188 	for (m = ms->mirror; m < ms->mirror + ms->nr_mirrors; m++)  in get_valid_mirror()
189 		if (!atomic_read(&m->error_count))  in get_valid_mirror()
190 			return m;  in get_valid_mirror()
209 static void fail_mirror(struct mirror *m, enum dm_raid1_error error_type)  in fail_mirror()  argument
211 	struct mirror_set *ms = m->ms;  in fail_mirror()
221 	atomic_inc(&m->error_count);  in fail_mirror()
223 	if (test_and_set_bit(error_type, &m->error_type))  in fail_mirror()
229 	if (m != get_default_mirror(ms))  in fail_mirror()
238 		      "Reads may fail.", m->dev->name);  in fail_mirror()
259 	struct mirror *m;  in mirror_flush()  local
267 	for (i = 0, m = ms->mirror; i < ms->nr_mirrors; i++, m++) {  in mirror_flush()
268 		io[i].bdev = m->dev->bdev;  in mirror_flush()
298 	int m, bit = 0;  in recovery_complete()  local
313 		for (m = 0; m < ms->nr_mirrors; m++) {  in recovery_complete()
314 			if (&ms->mirror[m] == get_default_mirror(ms))  in recovery_complete()
317 				fail_mirror(ms->mirror + m,  in recovery_complete()
331 	struct mirror *m;  in recover()  local
337 	m = get_default_mirror(ms);  in recover()
338 	from.bdev = m->dev->bdev;  in recover()
339 	from.sector = m->offset + dm_rh_region_to_sector(ms->rh, key);  in recover()
356 		m = ms->mirror + i;  in recover()
357 		dest->bdev = m->dev->bdev;  in recover()
358 		dest->sector = m->offset + dm_rh_region_to_sector(ms->rh, key);  in recover()
409 	struct mirror *m = get_default_mirror(ms);  in choose_mirror()  local
412 		if (likely(!atomic_read(&m->error_count)))  in choose_mirror()
413 			return m;  in choose_mirror()
415 		if (m-- == ms->mirror)  in choose_mirror()
416 			m += ms->nr_mirrors;  in choose_mirror()
417 	} while (m != get_default_mirror(ms));  in choose_mirror()
422 static int default_ok(struct mirror *m)  in default_ok()  argument
424 	struct mirror *default_mirror = get_default_mirror(m->ms);  in default_ok()
443 static sector_t map_sector(struct mirror *m, struct bio *bio)  in map_sector()  argument
447 	return m->offset + dm_target_offset(m->ms->ti, bio->bi_iter.bi_sector);  in map_sector()
450 static void map_bio(struct mirror *m, struct bio *bio)  in map_bio()  argument
452 	bio->bi_bdev = m->dev->bdev;  in map_bio()
453 	bio->bi_iter.bi_sector = map_sector(m, bio);  in map_bio()
456 static void map_region(struct dm_io_region *io, struct mirror *m,  in map_region()  argument
459 	io->bdev = m->dev->bdev;  in map_region()
460 	io->sector = map_sector(m, bio);  in map_region()
498 	struct mirror *m;  in read_callback()  local
500 	m = bio_get_m(bio);  in read_callback()
508 	fail_mirror(m, DM_RAID1_READ_ERROR);  in read_callback()
510 	if (likely(default_ok(m)) || mirror_available(m->ms, bio)) {  in read_callback()
513 			     m->dev->name);  in read_callback()
514 		queue_bio(m->ms, bio, bio_rw(bio));  in read_callback()
519 		    m->dev->name);  in read_callback()
524 static void read_async_bio(struct mirror *m, struct bio *bio)  in read_async_bio()  argument
533 		.client = m->ms->io_client,  in read_async_bio()
536 	map_region(&io, m, bio);  in read_async_bio()
537 	bio_set_m(bio, m);  in read_async_bio()
552 	struct mirror *m;  in do_reads()  local
556 		m = get_default_mirror(ms);  in do_reads()
562 			m = choose_mirror(ms, bio->bi_iter.bi_sector);  in do_reads()
563 		else if (m && atomic_read(&m->error_count))  in do_reads()
564 			m = NULL;  in do_reads()
566 		if (likely(m))  in do_reads()
567 			read_async_bio(m, bio);  in do_reads()
638 	struct mirror *m;  in do_write()  local
654 	for (i = 0, m = ms->mirror; i < ms->nr_mirrors; i++, m++)  in do_write()
655 		map_region(dest++, m, bio);  in do_write()
911 			 unsigned int m)  in free_context()  argument
913 	while (m--)  in free_context()
914 		dm_put_device(ti, ms->mirror[m].dev);  in free_context()
1037 	unsigned int nr_mirrors, m, args_used;  in mirror_ctr()  local
1071 	for (m = 0; m < nr_mirrors; m++) {  in mirror_ctr()
1072 		r = get_mirror(ms, ti, m, argv);  in mirror_ctr()
1074 			free_context(ms, ti, m);  in mirror_ctr()
1159 	struct mirror *m;  in mirror_map()  local
1193 	m = choose_mirror(ms, bio->bi_iter.bi_sector);  in mirror_map()
1194 	if (unlikely(!m))  in mirror_map()
1198 	bio_record->m = m;  in mirror_map()
1200 	map_bio(m, bio);  in mirror_map()
1209 	struct mirror *m = NULL;  in mirror_end_io()  local
1240 		m = bio_record->m;  in mirror_end_io()
1243 		      m->dev->name);  in mirror_end_io()
1245 		fail_mirror(m, DM_RAID1_READ_ERROR);  in mirror_end_io()
1251 		if (default_ok(m) || mirror_available(ms, bio)) {  in mirror_end_io()
1352 static char device_status_char(struct mirror *m)  in device_status_char()  argument
1354 	if (!atomic_read(&(m->error_count)))  in device_status_char()
1357 	return (test_bit(DM_RAID1_FLUSH_ERROR, &(m->error_type))) ? 'F' :  in device_status_char()
1358 		(test_bit(DM_RAID1_WRITE_ERROR, &(m->error_type))) ? 'D' :  in device_status_char()
1359 		(test_bit(DM_RAID1_SYNC_ERROR, &(m->error_type))) ? 'S' :  in device_status_char()
1360 		(test_bit(DM_RAID1_READ_ERROR, &(m->error_type))) ? 'R' : 'U';  in device_status_char()
1367 	unsigned int m, sz = 0;  in mirror_status()  local
1375 		for (m = 0; m < ms->nr_mirrors; m++) {  in mirror_status()
1376 			DMEMIT("%s ", ms->mirror[m].dev->name);  in mirror_status()
1377 			buffer[m] = device_status_char(&(ms->mirror[m]));  in mirror_status()
1379 		buffer[m] = '\0';  in mirror_status()
1393 		for (m = 0; m < ms->nr_mirrors; m++)  in mirror_status()
1394 			DMEMIT(" %s %llu", ms->mirror[m].dev->name,  in mirror_status()
1395 			       (unsigned long long)ms->mirror[m].offset);  in mirror_status()