Lines Matching refs:ms
42 struct mirror_set *ms; member
90 struct mirror_set *ms = context; in wakeup_mirrord() local
92 queue_work(ms->kmirrord_wq, &ms->kmirrord_work); in wakeup_mirrord()
97 struct mirror_set *ms = (struct mirror_set *) data; in delayed_wake_fn() local
99 clear_bit(0, &ms->timer_pending); in delayed_wake_fn()
100 wakeup_mirrord(ms); in delayed_wake_fn()
103 static void delayed_wake(struct mirror_set *ms) in delayed_wake() argument
105 if (test_and_set_bit(0, &ms->timer_pending)) in delayed_wake()
108 ms->timer.expires = jiffies + HZ / 5; in delayed_wake()
109 ms->timer.data = (unsigned long) ms; in delayed_wake()
110 ms->timer.function = delayed_wake_fn; in delayed_wake()
111 add_timer(&ms->timer); in delayed_wake()
119 static void queue_bio(struct mirror_set *ms, struct bio *bio, int rw) in queue_bio() argument
125 bl = (rw == WRITE) ? &ms->writes : &ms->reads; in queue_bio()
126 spin_lock_irqsave(&ms->lock, flags); in queue_bio()
129 spin_unlock_irqrestore(&ms->lock, flags); in queue_bio()
132 wakeup_mirrord(ms); in queue_bio()
137 struct mirror_set *ms = context; in dispatch_bios() local
141 queue_bio(ms, bio, WRITE); in dispatch_bios()
171 static struct mirror *get_default_mirror(struct mirror_set *ms) in get_default_mirror() argument
173 return &ms->mirror[atomic_read(&ms->default_mirror)]; in get_default_mirror()
178 struct mirror_set *ms = m->ms; in set_default_mirror() local
179 struct mirror *m0 = &(ms->mirror[0]); in set_default_mirror()
181 atomic_set(&ms->default_mirror, m - m0); in set_default_mirror()
184 static struct mirror *get_valid_mirror(struct mirror_set *ms) in get_valid_mirror() argument
188 for (m = ms->mirror; m < ms->mirror + ms->nr_mirrors; m++) in get_valid_mirror()
211 struct mirror_set *ms = m->ms; in fail_mirror() local
214 ms->leg_failure = 1; in fail_mirror()
226 if (!errors_handled(ms)) in fail_mirror()
229 if (m != get_default_mirror(ms)) in fail_mirror()
232 if (!ms->in_sync) { in fail_mirror()
242 new = get_valid_mirror(ms); in fail_mirror()
249 schedule_work(&ms->trigger_event); in fail_mirror()
254 struct mirror_set *ms = ti->private; in mirror_flush() local
258 struct dm_io_region io[ms->nr_mirrors]; in mirror_flush()
264 .client = ms->io_client, in mirror_flush()
267 for (i = 0, m = ms->mirror; i < ms->nr_mirrors; i++, m++) { in mirror_flush()
274 dm_io(&io_req, ms->nr_mirrors, io, &error_bits); in mirror_flush()
276 for (i = 0; i < ms->nr_mirrors; i++) in mirror_flush()
278 fail_mirror(ms->mirror + i, in mirror_flush()
297 struct mirror_set *ms = dm_rh_region_context(reg); in recovery_complete() local
303 fail_mirror(get_default_mirror(ms), DM_RAID1_SYNC_ERROR); in recovery_complete()
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()
326 static int recover(struct mirror_set *ms, struct dm_region *reg) in recover() argument
334 sector_t region_size = dm_rh_get_region_size(ms->rh); in recover()
337 m = get_default_mirror(ms); in recover()
339 from.sector = m->offset + dm_rh_region_to_sector(ms->rh, key); in recover()
340 if (key == (ms->nr_regions - 1)) { in recover()
345 from.count = ms->ti->len & (region_size - 1); in recover()
352 for (i = 0, dest = to; i < ms->nr_mirrors; i++) { in recover()
353 if (&ms->mirror[i] == get_default_mirror(ms)) in recover()
356 m = ms->mirror + i; in recover()
358 dest->sector = m->offset + dm_rh_region_to_sector(ms->rh, key); in recover()
364 if (!errors_handled(ms)) in recover()
367 r = dm_kcopyd_copy(ms->kcopyd_client, &from, ms->nr_mirrors - 1, to, in recover()
373 static void do_recovery(struct mirror_set *ms) in do_recovery() argument
376 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in do_recovery()
382 dm_rh_recovery_prepare(ms->rh); in do_recovery()
387 while ((reg = dm_rh_recovery_start(ms->rh))) { in do_recovery()
388 r = recover(ms, reg); in do_recovery()
396 if (!ms->in_sync && in do_recovery()
397 (log->type->get_sync_count(log) == ms->nr_regions)) { in do_recovery()
399 dm_table_event(ms->ti->table); in do_recovery()
400 ms->in_sync = 1; in do_recovery()
407 static struct mirror *choose_mirror(struct mirror_set *ms, sector_t sector) in choose_mirror() argument
409 struct mirror *m = get_default_mirror(ms); 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()
424 struct mirror *default_mirror = get_default_mirror(m->ms); in default_ok()
429 static int mirror_available(struct mirror_set *ms, struct bio *bio) in mirror_available() argument
431 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in mirror_available()
432 region_t region = dm_rh_bio_to_region(ms->rh, bio); in mirror_available()
435 return choose_mirror(ms, bio->bi_sector) ? 1 : 0; in mirror_available()
447 return m->offset + dm_target_offset(m->ms->ti, bio->bi_sector); in map_sector()
464 static void hold_bio(struct mirror_set *ms, struct bio *bio) in hold_bio() argument
470 spin_lock_irq(&ms->lock); in hold_bio()
472 if (atomic_read(&ms->suspend)) { in hold_bio()
473 spin_unlock_irq(&ms->lock); in hold_bio()
478 if (dm_noflush_suspending(ms->ti)) in hold_bio()
488 bio_list_add(&ms->holds, bio); in hold_bio()
489 spin_unlock_irq(&ms->lock); in hold_bio()
510 if (likely(default_ok(m)) || mirror_available(m->ms, bio)) { in read_callback()
514 queue_bio(m->ms, bio, bio_rw(bio)); in read_callback()
533 .client = m->ms->io_client, in read_async_bio()
541 static inline int region_in_sync(struct mirror_set *ms, region_t region, in region_in_sync() argument
544 int state = dm_rh_get_state(ms->rh, region, may_block); in region_in_sync()
548 static void do_reads(struct mirror_set *ms, struct bio_list *reads) in do_reads() argument
555 region = dm_rh_bio_to_region(ms->rh, bio); in do_reads()
556 m = get_default_mirror(ms); in do_reads()
561 if (likely(region_in_sync(ms, region, 1))) in do_reads()
562 m = choose_mirror(ms, bio->bi_sector); in do_reads()
589 struct mirror_set *ms; in write_callback() local
593 ms = bio_get_m(bio)->ms; in write_callback()
607 for (i = 0; i < ms->nr_mirrors; i++) in write_callback()
609 fail_mirror(ms->mirror + i, DM_RAID1_WRITE_ERROR); in write_callback()
616 spin_lock_irqsave(&ms->lock, flags); in write_callback()
617 if (!ms->failures.head) in write_callback()
619 bio_list_add(&ms->failures, bio); in write_callback()
620 spin_unlock_irqrestore(&ms->lock, flags); in write_callback()
622 wakeup_mirrord(ms); in write_callback()
625 static void do_write(struct mirror_set *ms, struct bio *bio) in do_write() argument
628 struct dm_io_region io[ms->nr_mirrors], *dest = io; in do_write()
636 .client = ms->io_client, in do_write()
645 for (i = 0, m = ms->mirror; i < ms->nr_mirrors; i++, m++) in do_write()
652 bio_set_m(bio, get_default_mirror(ms)); in do_write()
654 BUG_ON(dm_io(&io_req, ms->nr_mirrors, io, NULL)); in do_write()
657 static void do_writes(struct mirror_set *ms, struct bio_list *writes) in do_writes() argument
663 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in do_writes()
684 region = dm_rh_bio_to_region(ms->rh, bio); in do_writes()
692 state = dm_rh_get_state(ms->rh, region, 1); in do_writes()
716 spin_lock_irq(&ms->lock); in do_writes()
717 bio_list_merge(&ms->writes, &requeue); in do_writes()
718 spin_unlock_irq(&ms->lock); in do_writes()
719 delayed_wake(ms); in do_writes()
727 dm_rh_inc_pending(ms->rh, &sync); in do_writes()
728 dm_rh_inc_pending(ms->rh, &nosync); in do_writes()
735 ms->log_failure = dm_rh_flush(ms->rh) ? 1 : ms->log_failure; in do_writes()
740 if (unlikely(ms->log_failure) && errors_handled(ms)) { in do_writes()
741 spin_lock_irq(&ms->lock); in do_writes()
742 bio_list_merge(&ms->failures, &sync); in do_writes()
743 spin_unlock_irq(&ms->lock); in do_writes()
744 wakeup_mirrord(ms); in do_writes()
747 do_write(ms, bio); in do_writes()
750 dm_rh_delay(ms->rh, bio); in do_writes()
753 if (unlikely(ms->leg_failure) && errors_handled(ms)) { in do_writes()
754 spin_lock_irq(&ms->lock); in do_writes()
755 bio_list_add(&ms->failures, bio); in do_writes()
756 spin_unlock_irq(&ms->lock); in do_writes()
757 wakeup_mirrord(ms); in do_writes()
759 map_bio(get_default_mirror(ms), bio); in do_writes()
765 static void do_failures(struct mirror_set *ms, struct bio_list *failures) in do_failures() argument
790 if (!ms->log_failure) { in do_failures()
791 ms->in_sync = 0; in do_failures()
792 dm_rh_mark_nosync(ms->rh, bio); in do_failures()
803 if (!get_valid_mirror(ms)) in do_failures()
805 else if (errors_handled(ms)) in do_failures()
806 hold_bio(ms, bio); in do_failures()
814 struct mirror_set *ms = in trigger_event() local
817 dm_table_event(ms->ti->table); in trigger_event()
825 struct mirror_set *ms = container_of(work, struct mirror_set, in do_mirror() local
830 spin_lock_irqsave(&ms->lock, flags); in do_mirror()
831 reads = ms->reads; in do_mirror()
832 writes = ms->writes; in do_mirror()
833 failures = ms->failures; in do_mirror()
834 bio_list_init(&ms->reads); in do_mirror()
835 bio_list_init(&ms->writes); in do_mirror()
836 bio_list_init(&ms->failures); in do_mirror()
837 spin_unlock_irqrestore(&ms->lock, flags); in do_mirror()
839 dm_rh_update_states(ms->rh, errors_handled(ms)); in do_mirror()
840 do_recovery(ms); in do_mirror()
841 do_reads(ms, &reads); in do_mirror()
842 do_writes(ms, &writes); in do_mirror()
843 do_failures(ms, &failures); in do_mirror()
855 struct mirror_set *ms = NULL; in alloc_context() local
857 len = sizeof(*ms) + (sizeof(ms->mirror[0]) * nr_mirrors); in alloc_context()
859 ms = kzalloc(len, GFP_KERNEL); in alloc_context()
860 if (!ms) { in alloc_context()
865 spin_lock_init(&ms->lock); in alloc_context()
866 bio_list_init(&ms->reads); in alloc_context()
867 bio_list_init(&ms->writes); in alloc_context()
868 bio_list_init(&ms->failures); in alloc_context()
869 bio_list_init(&ms->holds); in alloc_context()
871 ms->ti = ti; in alloc_context()
872 ms->nr_mirrors = nr_mirrors; in alloc_context()
873 ms->nr_regions = dm_sector_div_up(ti->len, region_size); in alloc_context()
874 ms->in_sync = 0; in alloc_context()
875 ms->log_failure = 0; in alloc_context()
876 ms->leg_failure = 0; in alloc_context()
877 atomic_set(&ms->suspend, 0); in alloc_context()
878 atomic_set(&ms->default_mirror, DEFAULT_MIRROR); in alloc_context()
880 ms->io_client = dm_io_client_create(); in alloc_context()
881 if (IS_ERR(ms->io_client)) { in alloc_context()
883 kfree(ms); in alloc_context()
887 ms->rh = dm_region_hash_create(ms, dispatch_bios, wakeup_mirrord, in alloc_context()
889 ms->ti->begin, MAX_RECOVERY, in alloc_context()
890 dl, region_size, ms->nr_regions); in alloc_context()
891 if (IS_ERR(ms->rh)) { in alloc_context()
893 dm_io_client_destroy(ms->io_client); in alloc_context()
894 kfree(ms); in alloc_context()
898 return ms; in alloc_context()
901 static void free_context(struct mirror_set *ms, struct dm_target *ti, in free_context() argument
905 dm_put_device(ti, ms->mirror[m].dev); in free_context()
907 dm_io_client_destroy(ms->io_client); in free_context()
908 dm_region_hash_destroy(ms->rh); in free_context()
909 kfree(ms); in free_context()
912 static int get_mirror(struct mirror_set *ms, struct dm_target *ti, in get_mirror() argument
924 &ms->mirror[mirror].dev)) { in get_mirror()
929 ms->mirror[mirror].ms = ms; in get_mirror()
930 atomic_set(&(ms->mirror[mirror].error_count), 0); in get_mirror()
931 ms->mirror[mirror].error_type = 0; in get_mirror()
932 ms->mirror[mirror].offset = offset; in get_mirror()
975 static int parse_features(struct mirror_set *ms, unsigned argc, char **argv, in parse_features() argument
979 struct dm_target *ti = ms->ti; in parse_features()
1002 ms->features |= DM_RAID1_HANDLE_ERRORS; in parse_features()
1029 struct mirror_set *ms; in mirror_ctr() local
1055 ms = alloc_context(nr_mirrors, dl->type->get_region_size(dl), ti, dl); in mirror_ctr()
1056 if (!ms) { in mirror_ctr()
1063 r = get_mirror(ms, ti, m, argv); in mirror_ctr()
1065 free_context(ms, ti, m); in mirror_ctr()
1072 ti->private = ms; in mirror_ctr()
1074 r = dm_set_target_max_io_len(ti, dm_rh_get_region_size(ms->rh)); in mirror_ctr()
1083 ms->kmirrord_wq = alloc_workqueue("kmirrord", in mirror_ctr()
1085 if (!ms->kmirrord_wq) { in mirror_ctr()
1090 INIT_WORK(&ms->kmirrord_work, do_mirror); in mirror_ctr()
1091 init_timer(&ms->timer); in mirror_ctr()
1092 ms->timer_pending = 0; in mirror_ctr()
1093 INIT_WORK(&ms->trigger_event, trigger_event); in mirror_ctr()
1095 r = parse_features(ms, argc, argv, &args_used); in mirror_ctr()
1117 ms->kcopyd_client = dm_kcopyd_client_create(&dm_kcopyd_throttle); in mirror_ctr()
1118 if (IS_ERR(ms->kcopyd_client)) { in mirror_ctr()
1119 r = PTR_ERR(ms->kcopyd_client); in mirror_ctr()
1123 wakeup_mirrord(ms); in mirror_ctr()
1127 destroy_workqueue(ms->kmirrord_wq); in mirror_ctr()
1129 free_context(ms, ti, ms->nr_mirrors); in mirror_ctr()
1135 struct mirror_set *ms = (struct mirror_set *) ti->private; in mirror_dtr() local
1137 del_timer_sync(&ms->timer); in mirror_dtr()
1138 flush_workqueue(ms->kmirrord_wq); in mirror_dtr()
1139 flush_work(&ms->trigger_event); in mirror_dtr()
1140 dm_kcopyd_client_destroy(ms->kcopyd_client); in mirror_dtr()
1141 destroy_workqueue(ms->kmirrord_wq); in mirror_dtr()
1142 free_context(ms, ti, ms->nr_mirrors); in mirror_dtr()
1152 struct mirror_set *ms = ti->private; in mirror_map() local
1153 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in mirror_map()
1161 bio_record->write_region = dm_rh_bio_to_region(ms->rh, bio); in mirror_map()
1162 queue_bio(ms, bio, rw); in mirror_map()
1166 r = log->type->in_sync(log, dm_rh_bio_to_region(ms->rh, bio), 0); in mirror_map()
1177 queue_bio(ms, bio, rw); in mirror_map()
1185 m = choose_mirror(ms, bio->bi_sector); in mirror_map()
1200 struct mirror_set *ms = (struct mirror_set *) ti->private; in mirror_end_io() local
1211 dm_rh_dec(ms->rh, bio_record->write_region); in mirror_end_io()
1243 if (default_ok(m) || mirror_available(ms, bio)) { in mirror_end_io()
1248 queue_bio(ms, bio, rw); in mirror_end_io()
1262 struct mirror_set *ms = (struct mirror_set *) ti->private; in mirror_presuspend() local
1263 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in mirror_presuspend()
1268 atomic_set(&ms->suspend, 1); in mirror_presuspend()
1276 spin_lock_irq(&ms->lock); in mirror_presuspend()
1277 holds = ms->holds; in mirror_presuspend()
1278 bio_list_init(&ms->holds); in mirror_presuspend()
1279 spin_unlock_irq(&ms->lock); in mirror_presuspend()
1282 hold_bio(ms, bio); in mirror_presuspend()
1288 dm_rh_stop_recovery(ms->rh); in mirror_presuspend()
1291 !dm_rh_recovery_in_flight(ms->rh)); in mirror_presuspend()
1303 flush_workqueue(ms->kmirrord_wq); in mirror_presuspend()
1308 struct mirror_set *ms = ti->private; in mirror_postsuspend() local
1309 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in mirror_postsuspend()
1318 struct mirror_set *ms = ti->private; in mirror_resume() local
1319 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in mirror_resume()
1321 atomic_set(&ms->suspend, 0); in mirror_resume()
1325 dm_rh_start_recovery(ms->rh); in mirror_resume()
1357 struct mirror_set *ms = (struct mirror_set *) ti->private; in mirror_status() local
1358 struct dm_dirty_log *log = dm_rh_dirty_log(ms->rh); in mirror_status()
1359 char buffer[ms->nr_mirrors + 1]; in mirror_status()
1363 DMEMIT("%d ", ms->nr_mirrors); in mirror_status()
1364 for (m = 0; m < ms->nr_mirrors; m++) { in mirror_status()
1365 DMEMIT("%s ", ms->mirror[m].dev->name); in mirror_status()
1366 buffer[m] = device_status_char(&(ms->mirror[m])); in mirror_status()
1372 (unsigned long long)ms->nr_regions, buffer); in mirror_status()
1381 DMEMIT("%d", ms->nr_mirrors); in mirror_status()
1382 for (m = 0; m < ms->nr_mirrors; m++) in mirror_status()
1383 DMEMIT(" %s %llu", ms->mirror[m].dev->name, in mirror_status()
1384 (unsigned long long)ms->mirror[m].offset); in mirror_status()
1386 if (ms->features & DM_RAID1_HANDLE_ERRORS) in mirror_status()
1394 struct mirror_set *ms = ti->private; in mirror_iterate_devices() local
1398 for (i = 0; !ret && i < ms->nr_mirrors; i++) in mirror_iterate_devices()
1399 ret = fn(ti, ms->mirror[i].dev, in mirror_iterate_devices()
1400 ms->mirror[i].offset, ti->len, data); in mirror_iterate_devices()