Lines Matching full:log
18 #include "raid5-log.h"
28 * log->max_free_space is min(1/4 disk size, 10G reclaimable space).
30 * In write through mode, the reclaim runs every log->max_free_space.
70 * writes are committed from the log device. Therefore, a stripe in
72 * - write to log device
87 sector_t device_size; /* log device size, round to
92 sector_t last_checkpoint; /* log tail. where recovery scan
94 u64 last_cp_seq; /* log tail sequence */
96 sector_t log_start; /* log head. where new data appends */
97 u64 seq; /* log head sequence */
107 * written to the log */
109 * written to the log but not yet written
111 struct list_head flushing_ios; /* io_units which are waiting for log
113 struct list_head finished_ios; /* io_units which settle down in log disk */
133 struct list_head no_space_stripes; /* pending stripes, log has no space */
205 * unit is written to log disk with normal write, as we always flush log disk
210 struct r5l_log *log; member
221 struct list_head log_sibling; /* log->running_ios */
244 IO_UNIT_IO_START = 1, /* io_unit bio start writing to log,
246 IO_UNIT_IO_END = 2, /* io_unit bio finish writing to log */
250 bool r5c_is_writeback(struct r5l_log *log) in r5c_is_writeback() argument
252 return (log != NULL && in r5c_is_writeback()
253 log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_BACK); in r5c_is_writeback()
256 static sector_t r5l_ring_add(struct r5l_log *log, sector_t start, sector_t inc) in r5l_ring_add() argument
259 if (start >= log->device_size) in r5l_ring_add()
260 start = start - log->device_size; in r5l_ring_add()
264 static sector_t r5l_ring_distance(struct r5l_log *log, sector_t start, in r5l_ring_distance() argument
270 return end + log->device_size - start; in r5l_ring_distance()
273 static bool r5l_has_free_space(struct r5l_log *log, sector_t size) in r5l_has_free_space() argument
277 used_size = r5l_ring_distance(log, log->last_checkpoint, in r5l_has_free_space()
278 log->log_start); in r5l_has_free_space()
280 return log->device_size > used_size + size; in r5l_has_free_space()
320 void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
326 struct r5l_log *log = READ_ONCE(conf->log); in r5c_check_stripe_cache_usage() local
328 if (!r5c_is_writeback(log)) in r5c_check_stripe_cache_usage()
344 r5l_wake_reclaim(log, 0); in r5c_check_stripe_cache_usage()
353 struct r5l_log *log = READ_ONCE(conf->log); in r5c_check_cached_full_stripe() local
355 if (!r5c_is_writeback(log)) in r5c_check_cached_full_stripe()
365 r5l_wake_reclaim(log, 0); in r5c_check_cached_full_stripe()
369 * Total log space (in sectors) needed to flush all data in cache
371 * To avoid deadlock due to log space, it is necessary to reserve log
372 * space to flush critical stripes (stripes that occupying log space near
373 * last_checkpoint). This function helps check how much log space is
376 * To reduce log space requirements, two mechanisms are used to give cache
398 struct r5l_log *log = READ_ONCE(conf->log); in r5c_log_required_to_flush_cache() local
400 if (!r5c_is_writeback(log)) in r5c_log_required_to_flush_cache()
404 ((conf->max_degraded + 1) * atomic_read(&log->stripe_in_journal_count) + in r5c_log_required_to_flush_cache()
409 * evaluate log space usage and update R5C_LOG_TIGHT and R5C_LOG_CRITICAL
411 * R5C_LOG_TIGHT is set when free space on the log device is less than 3x of
412 * reclaim_required_space. R5C_LOG_CRITICAL is set when free space on the log
415 static inline void r5c_update_log_state(struct r5l_log *log) in r5c_update_log_state() argument
417 struct r5conf *conf = log->rdev->mddev->private; in r5c_update_log_state()
422 if (!r5c_is_writeback(log)) in r5c_update_log_state()
425 free_space = r5l_ring_distance(log, log->log_start, in r5c_update_log_state()
426 log->last_checkpoint); in r5c_update_log_state()
441 r5l_wake_reclaim(log, 0); in r5c_update_log_state()
451 struct r5l_log *log = READ_ONCE(conf->log); in r5c_make_stripe_write_out() local
453 BUG_ON(!r5c_is_writeback(log)); in r5c_make_stripe_write_out()
489 * log device. This is called from r5l_log_endio() or r5l_log_flush_endio().
493 struct r5l_log *log = READ_ONCE(sh->raid_conf->log); in r5c_finish_cache_stripe() local
495 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) { in r5c_finish_cache_stripe()
526 static void r5l_log_run_stripes(struct r5l_log *log) in r5l_log_run_stripes() argument
530 lockdep_assert_held(&log->io_list_lock); in r5l_log_run_stripes()
532 list_for_each_entry_safe(io, next, &log->running_ios, log_sibling) { in r5l_log_run_stripes()
537 list_move_tail(&io->log_sibling, &log->finished_ios); in r5l_log_run_stripes()
542 static void r5l_move_to_end_ios(struct r5l_log *log) in r5l_move_to_end_ios() argument
546 lockdep_assert_held(&log->io_list_lock); in r5l_move_to_end_ios()
548 list_for_each_entry_safe(io, next, &log->running_ios, log_sibling) { in r5l_move_to_end_ios()
552 list_move_tail(&io->log_sibling, &log->io_end_ios); in r5l_move_to_end_ios()
561 struct r5l_log *log = io->log; in r5l_log_endio() local
567 md_error(log->rdev->mddev, log->rdev); in r5l_log_endio()
570 mempool_free(io->meta_page, &log->meta_pool); in r5l_log_endio()
572 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_log_endio()
584 if (log->need_cache_flush && !list_empty(&io->stripe_list)) in r5l_log_endio()
585 r5l_move_to_end_ios(log); in r5l_log_endio()
587 r5l_log_run_stripes(log); in r5l_log_endio()
588 if (!list_empty(&log->running_ios)) { in r5l_log_endio()
593 io_deferred = list_first_entry(&log->running_ios, in r5l_log_endio()
596 schedule_work(&log->deferred_io_work); in r5l_log_endio()
599 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_log_endio()
601 if (log->need_cache_flush) in r5l_log_endio()
602 md_wakeup_thread(log->rdev->mddev->thread); in r5l_log_endio()
623 static void r5l_do_submit_io(struct r5l_log *log, struct r5l_io_unit *io) in r5l_do_submit_io() argument
627 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_do_submit_io()
629 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_do_submit_io()
660 struct r5l_log *log = container_of(work, struct r5l_log, in r5l_submit_io_async() local
665 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_submit_io_async()
666 if (!list_empty(&log->running_ios)) { in r5l_submit_io_async()
667 io = list_first_entry(&log->running_ios, struct r5l_io_unit, in r5l_submit_io_async()
674 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_submit_io_async()
676 r5l_do_submit_io(log, io); in r5l_submit_io_async()
681 struct r5l_log *log = container_of(work, struct r5l_log, in r5c_disable_writeback_async() local
683 struct mddev *mddev = log->rdev->mddev; in r5c_disable_writeback_async()
686 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5c_disable_writeback_async()
693 !READ_ONCE(conf->log) || in r5c_disable_writeback_async()
696 log = READ_ONCE(conf->log); in r5c_disable_writeback_async()
697 if (log) { in r5c_disable_writeback_async()
699 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; in r5c_disable_writeback_async()
704 static void r5l_submit_current_io(struct r5l_log *log) in r5l_submit_current_io() argument
706 struct r5l_io_unit *io = log->current_io; in r5l_submit_current_io()
717 crc = crc32c_le(log->uuid_checksum, block, PAGE_SIZE); in r5l_submit_current_io()
720 log->current_io = NULL; in r5l_submit_current_io()
721 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_submit_current_io()
723 if (io != list_first_entry(&log->running_ios, in r5l_submit_current_io()
729 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_submit_current_io()
731 r5l_do_submit_io(log, io); in r5l_submit_current_io()
734 static struct bio *r5l_bio_alloc(struct r5l_log *log) in r5l_bio_alloc() argument
736 struct bio *bio = bio_alloc_bioset(log->rdev->bdev, BIO_MAX_VECS, in r5l_bio_alloc()
737 REQ_OP_WRITE, GFP_NOIO, &log->bs); in r5l_bio_alloc()
739 bio->bi_iter.bi_sector = log->rdev->data_offset + log->log_start; in r5l_bio_alloc()
744 static void r5_reserve_log_entry(struct r5l_log *log, struct r5l_io_unit *io) in r5_reserve_log_entry() argument
746 log->log_start = r5l_ring_add(log, log->log_start, BLOCK_SECTORS); in r5_reserve_log_entry()
748 r5c_update_log_state(log); in r5_reserve_log_entry()
750 * If we filled up the log device start from the beginning again, in r5_reserve_log_entry()
753 * Note: for this to work properly the log size needs to me a multiple in r5_reserve_log_entry()
756 if (log->log_start == 0) in r5_reserve_log_entry()
759 io->log_end = log->log_start; in r5_reserve_log_entry()
762 static struct r5l_io_unit *r5l_new_meta(struct r5l_log *log) in r5l_new_meta() argument
767 io = mempool_alloc(&log->io_pool, GFP_ATOMIC); in r5l_new_meta()
772 io->log = log; in r5l_new_meta()
778 io->meta_page = mempool_alloc(&log->meta_pool, GFP_NOIO); in r5l_new_meta()
783 block->seq = cpu_to_le64(log->seq); in r5l_new_meta()
784 block->position = cpu_to_le64(log->log_start); in r5l_new_meta()
786 io->log_start = log->log_start; in r5l_new_meta()
788 io->seq = log->seq++; in r5l_new_meta()
790 io->current_bio = r5l_bio_alloc(log); in r5l_new_meta()
795 r5_reserve_log_entry(log, io); in r5l_new_meta()
797 spin_lock_irq(&log->io_list_lock); in r5l_new_meta()
798 list_add_tail(&io->log_sibling, &log->running_ios); in r5l_new_meta()
799 spin_unlock_irq(&log->io_list_lock); in r5l_new_meta()
804 static int r5l_get_meta(struct r5l_log *log, unsigned int payload_size) in r5l_get_meta() argument
806 if (log->current_io && in r5l_get_meta()
807 log->current_io->meta_offset + payload_size > PAGE_SIZE) in r5l_get_meta()
808 r5l_submit_current_io(log); in r5l_get_meta()
810 if (!log->current_io) { in r5l_get_meta()
811 log->current_io = r5l_new_meta(log); in r5l_get_meta()
812 if (!log->current_io) in r5l_get_meta()
819 static void r5l_append_payload_meta(struct r5l_log *log, u16 type, in r5l_append_payload_meta() argument
824 struct r5l_io_unit *io = log->current_io; in r5l_append_payload_meta()
841 static void r5l_append_payload_page(struct r5l_log *log, struct page *page) in r5l_append_payload_page() argument
843 struct r5l_io_unit *io = log->current_io; in r5l_append_payload_page()
848 io->current_bio = r5l_bio_alloc(log); in r5l_append_payload_page()
856 r5_reserve_log_entry(log, io); in r5l_append_payload_page()
859 static void r5l_append_flush_payload(struct r5l_log *log, sector_t sect) in r5l_append_flush_payload() argument
861 struct mddev *mddev = log->rdev->mddev; in r5l_append_flush_payload()
875 mutex_lock(&log->io_mutex); in r5l_append_flush_payload()
878 if (r5l_get_meta(log, meta_size)) { in r5l_append_flush_payload()
879 mutex_unlock(&log->io_mutex); in r5l_append_flush_payload()
884 io = log->current_io; in r5l_append_flush_payload()
896 mutex_unlock(&log->io_mutex); in r5l_append_flush_payload()
899 static int r5l_log_stripe(struct r5l_log *log, struct stripe_head *sh, in r5l_log_stripe() argument
913 ret = r5l_get_meta(log, meta_size); in r5l_log_stripe()
917 io = log->current_io; in r5l_log_stripe()
929 log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_BACK) { in r5l_log_stripe()
937 r5l_append_payload_meta(log, R5LOG_PAYLOAD_DATA, in r5l_log_stripe()
940 r5l_append_payload_page(log, sh->dev[i].page); in r5l_log_stripe()
944 r5l_append_payload_meta(log, R5LOG_PAYLOAD_PARITY, in r5l_log_stripe()
947 r5l_append_payload_page(log, sh->dev[sh->pd_idx].page); in r5l_log_stripe()
948 r5l_append_payload_page(log, sh->dev[sh->qd_idx].page); in r5l_log_stripe()
950 r5l_append_payload_meta(log, R5LOG_PAYLOAD_PARITY, in r5l_log_stripe()
953 r5l_append_payload_page(log, sh->dev[sh->pd_idx].page); in r5l_log_stripe()
961 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5l_log_stripe()
967 spin_lock_irq(&log->stripe_in_journal_lock); in r5l_log_stripe()
969 &log->stripe_in_journal_list); in r5l_log_stripe()
970 spin_unlock_irq(&log->stripe_in_journal_lock); in r5l_log_stripe()
971 atomic_inc(&log->stripe_in_journal_count); in r5l_log_stripe()
977 static inline void r5l_add_no_space_stripe(struct r5l_log *log, in r5l_add_no_space_stripe() argument
980 spin_lock(&log->no_space_stripes_lock); in r5l_add_no_space_stripe()
981 list_add_tail(&sh->log_list, &log->no_space_stripes); in r5l_add_no_space_stripe()
982 spin_unlock(&log->no_space_stripes_lock); in r5l_add_no_space_stripe()
987 * data from log to raid disks), so we shouldn't wait for reclaim here
989 int r5l_write_stripe(struct r5l_log *log, struct stripe_head *sh) in r5l_write_stripe() argument
999 if (!log) in r5l_write_stripe()
1004 /* the stripe is written to log, we start writing it to raid */ in r5l_write_stripe()
1023 sh->dev[i].log_checksum = crc32c_le(log->uuid_checksum, in r5l_write_stripe()
1038 mutex_lock(&log->io_mutex); in r5l_write_stripe()
1042 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) { in r5l_write_stripe()
1043 if (!r5l_has_free_space(log, reserve)) { in r5l_write_stripe()
1044 r5l_add_no_space_stripe(log, sh); in r5l_write_stripe()
1047 ret = r5l_log_stripe(log, sh, data_pages, parity_pages); in r5l_write_stripe()
1049 spin_lock_irq(&log->io_list_lock); in r5l_write_stripe()
1051 &log->no_mem_stripes); in r5l_write_stripe()
1052 spin_unlock_irq(&log->io_list_lock); in r5l_write_stripe()
1057 * log space critical, do not process stripes that are in r5l_write_stripe()
1062 r5l_add_no_space_stripe(log, sh); in r5l_write_stripe()
1065 } else if (!r5l_has_free_space(log, reserve)) { in r5l_write_stripe()
1066 if (sh->log_start == log->last_checkpoint) in r5l_write_stripe()
1069 r5l_add_no_space_stripe(log, sh); in r5l_write_stripe()
1071 ret = r5l_log_stripe(log, sh, data_pages, parity_pages); in r5l_write_stripe()
1073 spin_lock_irq(&log->io_list_lock); in r5l_write_stripe()
1075 &log->no_mem_stripes); in r5l_write_stripe()
1076 spin_unlock_irq(&log->io_list_lock); in r5l_write_stripe()
1081 mutex_unlock(&log->io_mutex); in r5l_write_stripe()
1083 r5l_wake_reclaim(log, reserve); in r5l_write_stripe()
1087 void r5l_write_stripe_run(struct r5l_log *log) in r5l_write_stripe_run() argument
1089 if (!log) in r5l_write_stripe_run()
1091 mutex_lock(&log->io_mutex); in r5l_write_stripe_run()
1092 r5l_submit_current_io(log); in r5l_write_stripe_run()
1093 mutex_unlock(&log->io_mutex); in r5l_write_stripe_run()
1096 int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio) in r5l_handle_flush_request() argument
1098 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) { in r5l_handle_flush_request()
1101 * we flush log disk cache first, then write stripe data to in r5l_handle_flush_request()
1102 * raid disks. So if bio is finished, the log disk cache is in r5l_handle_flush_request()
1104 * the bio from log disk, so we don't need to flush again in r5l_handle_flush_request()
1114 mutex_lock(&log->io_mutex); in r5l_handle_flush_request()
1115 r5l_get_meta(log, 0); in r5l_handle_flush_request()
1116 bio_list_add(&log->current_io->flush_barriers, bio); in r5l_handle_flush_request()
1117 log->current_io->has_flush = 1; in r5l_handle_flush_request()
1118 log->current_io->has_null_flush = 1; in r5l_handle_flush_request()
1119 atomic_inc(&log->current_io->pending_stripe); in r5l_handle_flush_request()
1120 r5l_submit_current_io(log); in r5l_handle_flush_request()
1121 mutex_unlock(&log->io_mutex); in r5l_handle_flush_request()
1128 /* This will run after log space is reclaimed */
1129 static void r5l_run_no_space_stripes(struct r5l_log *log) in r5l_run_no_space_stripes() argument
1133 spin_lock(&log->no_space_stripes_lock); in r5l_run_no_space_stripes()
1134 while (!list_empty(&log->no_space_stripes)) { in r5l_run_no_space_stripes()
1135 sh = list_first_entry(&log->no_space_stripes, in r5l_run_no_space_stripes()
1141 spin_unlock(&log->no_space_stripes_lock); in r5l_run_no_space_stripes()
1146 * for write through mode, returns log->next_checkpoint
1152 struct r5l_log *log = READ_ONCE(conf->log); in r5c_calculate_new_cp() local
1156 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5c_calculate_new_cp()
1157 return log->next_checkpoint; in r5c_calculate_new_cp()
1159 spin_lock_irqsave(&log->stripe_in_journal_lock, flags); in r5c_calculate_new_cp()
1160 if (list_empty(&log->stripe_in_journal_list)) { in r5c_calculate_new_cp()
1162 spin_unlock_irqrestore(&log->stripe_in_journal_lock, flags); in r5c_calculate_new_cp()
1163 return log->next_checkpoint; in r5c_calculate_new_cp()
1165 sh = list_first_entry(&log->stripe_in_journal_list, in r5c_calculate_new_cp()
1168 spin_unlock_irqrestore(&log->stripe_in_journal_lock, flags); in r5c_calculate_new_cp()
1172 static sector_t r5l_reclaimable_space(struct r5l_log *log) in r5l_reclaimable_space() argument
1174 struct r5conf *conf = log->rdev->mddev->private; in r5l_reclaimable_space()
1176 return r5l_ring_distance(log, log->last_checkpoint, in r5l_reclaimable_space()
1180 static void r5l_run_no_mem_stripe(struct r5l_log *log) in r5l_run_no_mem_stripe() argument
1184 lockdep_assert_held(&log->io_list_lock); in r5l_run_no_mem_stripe()
1186 if (!list_empty(&log->no_mem_stripes)) { in r5l_run_no_mem_stripe()
1187 sh = list_first_entry(&log->no_mem_stripes, in r5l_run_no_mem_stripe()
1195 static bool r5l_complete_finished_ios(struct r5l_log *log) in r5l_complete_finished_ios() argument
1200 lockdep_assert_held(&log->io_list_lock); in r5l_complete_finished_ios()
1202 list_for_each_entry_safe(io, next, &log->finished_ios, log_sibling) { in r5l_complete_finished_ios()
1207 log->next_checkpoint = io->log_start; in r5l_complete_finished_ios()
1210 mempool_free(io, &log->io_pool); in r5l_complete_finished_ios()
1211 r5l_run_no_mem_stripe(log); in r5l_complete_finished_ios()
1221 struct r5l_log *log = io->log; in __r5l_stripe_write_finished() local
1222 struct r5conf *conf = log->rdev->mddev->private; in __r5l_stripe_write_finished()
1225 spin_lock_irqsave(&log->io_list_lock, flags); in __r5l_stripe_write_finished()
1228 if (!r5l_complete_finished_ios(log)) { in __r5l_stripe_write_finished()
1229 spin_unlock_irqrestore(&log->io_list_lock, flags); in __r5l_stripe_write_finished()
1233 if (r5l_reclaimable_space(log) > log->max_free_space || in __r5l_stripe_write_finished()
1235 r5l_wake_reclaim(log, 0); in __r5l_stripe_write_finished()
1237 spin_unlock_irqrestore(&log->io_list_lock, flags); in __r5l_stripe_write_finished()
1238 wake_up(&log->iounit_wait); in __r5l_stripe_write_finished()
1254 struct r5l_log *log = container_of(bio, struct r5l_log, in r5l_log_flush_endio() local
1260 md_error(log->rdev->mddev, log->rdev); in r5l_log_flush_endio()
1263 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_log_flush_endio()
1264 list_for_each_entry(io, &log->flushing_ios, log_sibling) in r5l_log_flush_endio()
1266 list_splice_tail_init(&log->flushing_ios, &log->finished_ios); in r5l_log_flush_endio()
1267 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_log_flush_endio()
1272 * io_unit(meta) consists of a log. There is one situation we want to avoid. A
1273 * broken meta in the middle of a log causes recovery can't find meta at the
1274 * head of log. If operations require meta at the head persistent in log, we
1275 * must make sure meta before it persistent in log too. A case is:
1277 * stripe data/parity is in log, we start write stripe to raid disks. stripe
1278 * data/parity must be persistent in log before we do the write to raid disks.
1282 * one whose data/parity is in log.
1284 void r5l_flush_stripe_to_raid(struct r5l_log *log) in r5l_flush_stripe_to_raid() argument
1288 if (!log || !log->need_cache_flush) in r5l_flush_stripe_to_raid()
1291 spin_lock_irq(&log->io_list_lock); in r5l_flush_stripe_to_raid()
1293 if (!list_empty(&log->flushing_ios)) { in r5l_flush_stripe_to_raid()
1294 spin_unlock_irq(&log->io_list_lock); in r5l_flush_stripe_to_raid()
1297 list_splice_tail_init(&log->io_end_ios, &log->flushing_ios); in r5l_flush_stripe_to_raid()
1298 do_flush = !list_empty(&log->flushing_ios); in r5l_flush_stripe_to_raid()
1299 spin_unlock_irq(&log->io_list_lock); in r5l_flush_stripe_to_raid()
1303 bio_init(&log->flush_bio, log->rdev->bdev, NULL, 0, in r5l_flush_stripe_to_raid()
1305 log->flush_bio.bi_end_io = r5l_log_flush_endio; in r5l_flush_stripe_to_raid()
1306 submit_bio(&log->flush_bio); in r5l_flush_stripe_to_raid()
1309 static void r5l_write_super(struct r5l_log *log, sector_t cp);
1310 static void r5l_write_super_and_discard_space(struct r5l_log *log, in r5l_write_super_and_discard_space() argument
1313 struct block_device *bdev = log->rdev->bdev; in r5l_write_super_and_discard_space()
1316 r5l_write_super(log, end); in r5l_write_super_and_discard_space()
1321 mddev = log->rdev->mddev; in r5l_write_super_and_discard_space()
1324 * superblock is updated to new log tail. Updating superblock (either in r5l_write_super_and_discard_space()
1341 if (log->last_checkpoint < end) { in r5l_write_super_and_discard_space()
1343 log->last_checkpoint + log->rdev->data_offset, in r5l_write_super_and_discard_space()
1344 end - log->last_checkpoint, GFP_NOIO); in r5l_write_super_and_discard_space()
1347 log->last_checkpoint + log->rdev->data_offset, in r5l_write_super_and_discard_space()
1348 log->device_size - log->last_checkpoint, in r5l_write_super_and_discard_space()
1350 blkdev_issue_discard(bdev, log->rdev->data_offset, end, in r5l_write_super_and_discard_space()
1400 if (!READ_ONCE(conf->log)) in r5c_flush_cache()
1421 struct r5l_log *log = READ_ONCE(conf->log); in r5c_do_reclaim() local
1429 if (!r5c_is_writeback(log)) in r5c_do_reclaim()
1463 /* if log space is tight, flush stripes on stripe_in_journal_list */ in r5c_do_reclaim()
1465 spin_lock_irqsave(&log->stripe_in_journal_lock, flags); in r5c_do_reclaim()
1467 list_for_each_entry(sh, &log->stripe_in_journal_list, r5c) { in r5c_do_reclaim()
1485 spin_unlock_irqrestore(&log->stripe_in_journal_lock, flags); in r5c_do_reclaim()
1489 r5l_run_no_space_stripes(log); in r5c_do_reclaim()
1494 static void r5l_do_reclaim(struct r5l_log *log) in r5l_do_reclaim() argument
1496 struct r5conf *conf = log->rdev->mddev->private; in r5l_do_reclaim()
1497 sector_t reclaim_target = xchg(&log->reclaim_target, 0); in r5l_do_reclaim()
1502 spin_lock_irq(&log->io_list_lock); in r5l_do_reclaim()
1503 write_super = r5l_reclaimable_space(log) > log->max_free_space || in r5l_do_reclaim()
1504 reclaim_target != 0 || !list_empty(&log->no_space_stripes); in r5l_do_reclaim()
1511 reclaimable = r5l_reclaimable_space(log); in r5l_do_reclaim()
1513 (list_empty(&log->running_ios) && in r5l_do_reclaim()
1514 list_empty(&log->io_end_ios) && in r5l_do_reclaim()
1515 list_empty(&log->flushing_ios) && in r5l_do_reclaim()
1516 list_empty(&log->finished_ios))) in r5l_do_reclaim()
1519 md_wakeup_thread(log->rdev->mddev->thread); in r5l_do_reclaim()
1520 wait_event_lock_irq(log->iounit_wait, in r5l_do_reclaim()
1521 r5l_reclaimable_space(log) > reclaimable, in r5l_do_reclaim()
1522 log->io_list_lock); in r5l_do_reclaim()
1526 spin_unlock_irq(&log->io_list_lock); in r5l_do_reclaim()
1533 * here, because the log area might be reused soon and we don't want to in r5l_do_reclaim()
1536 r5l_write_super_and_discard_space(log, next_checkpoint); in r5l_do_reclaim()
1538 mutex_lock(&log->io_mutex); in r5l_do_reclaim()
1539 log->last_checkpoint = next_checkpoint; in r5l_do_reclaim()
1540 r5c_update_log_state(log); in r5l_do_reclaim()
1541 mutex_unlock(&log->io_mutex); in r5l_do_reclaim()
1543 r5l_run_no_space_stripes(log); in r5l_do_reclaim()
1550 struct r5l_log *log = READ_ONCE(conf->log); in r5l_reclaim_thread() local
1552 if (!log) in r5l_reclaim_thread()
1555 r5l_do_reclaim(log); in r5l_reclaim_thread()
1558 void r5l_wake_reclaim(struct r5l_log *log, sector_t space) in r5l_wake_reclaim() argument
1563 if (!log) in r5l_wake_reclaim()
1566 target = READ_ONCE(log->reclaim_target); in r5l_wake_reclaim()
1570 } while (!try_cmpxchg(&log->reclaim_target, &target, new)); in r5l_wake_reclaim()
1571 md_wakeup_thread(log->reclaim_thread); in r5l_wake_reclaim()
1574 void r5l_quiesce(struct r5l_log *log, int quiesce) in r5l_quiesce() argument
1576 struct mddev *mddev = log->rdev->mddev; in r5l_quiesce()
1578 log->reclaim_thread, lockdep_is_held(&mddev->reconfig_mutex)); in r5l_quiesce()
1584 r5l_wake_reclaim(log, MaxSector); in r5l_quiesce()
1585 r5l_do_reclaim(log); in r5l_quiesce()
1592 struct r5l_log *log = READ_ONCE(conf->log); in r5l_log_disk_error() local
1595 if (!log) in r5l_log_disk_error()
1598 return test_bit(Faulty, &log->rdev->flags); in r5l_log_disk_error()
1614 * in recovery, log is read sequentially. It is not efficient to
1616 * reads multiple pages with one IO, so further log read can
1626 static int r5l_recovery_allocate_ra_pool(struct r5l_log *log, in r5l_recovery_allocate_ra_pool() argument
1649 static void r5l_recovery_free_ra_pool(struct r5l_log *log, in r5l_recovery_free_ra_pool() argument
1664 static int r5l_recovery_fetch_ra_pool(struct r5l_log *log, in r5l_recovery_fetch_ra_pool() argument
1671 bio_init(&bio, log->rdev->bdev, ctx->ra_bvec, in r5l_recovery_fetch_ra_pool()
1673 bio.bi_iter.bi_sector = log->rdev->data_offset + offset; in r5l_recovery_fetch_ra_pool()
1683 offset = r5l_ring_add(log, offset, BLOCK_SECTORS); in r5l_recovery_fetch_ra_pool()
1698 static int r5l_recovery_read_page(struct r5l_log *log, in r5l_recovery_read_page() argument
1707 ret = r5l_recovery_fetch_ra_pool(log, ctx, offset); in r5l_recovery_read_page()
1722 static int r5l_recovery_read_meta_block(struct r5l_log *log, in r5l_recovery_read_meta_block() argument
1730 ret = r5l_recovery_read_page(log, ctx, page, ctx->pos); in r5l_recovery_read_meta_block()
1744 crc = crc32c_le(log->uuid_checksum, mb, PAGE_SIZE); in r5l_recovery_read_meta_block()
1757 r5l_recovery_create_empty_meta_block(struct r5l_log *log, in r5l_recovery_create_empty_meta_block() argument
1772 static int r5l_log_write_empty_meta_block(struct r5l_log *log, sector_t pos, in r5l_log_write_empty_meta_block() argument
1781 r5l_recovery_create_empty_meta_block(log, page, pos, seq); in r5l_log_write_empty_meta_block()
1783 mb->checksum = cpu_to_le32(crc32c_le(log->uuid_checksum, in r5l_log_write_empty_meta_block()
1785 if (!sync_page_io(log->rdev, pos, PAGE_SIZE, page, REQ_OP_WRITE | in r5l_log_write_empty_meta_block()
1801 static void r5l_recovery_load_data(struct r5l_log *log, in r5l_recovery_load_data() argument
1807 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_load_data()
1814 r5l_recovery_read_page(log, ctx, sh->dev[dd_idx].page, log_offset); in r5l_recovery_load_data()
1823 static void r5l_recovery_load_parity(struct r5l_log *log, in r5l_recovery_load_parity() argument
1829 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_load_parity()
1833 r5l_recovery_read_page(log, ctx, sh->dev[sh->pd_idx].page, log_offset); in r5l_recovery_load_parity()
1840 log, ctx, sh->dev[sh->qd_idx].page, in r5l_recovery_load_parity()
1841 r5l_ring_add(log, log_offset, BLOCK_SECTORS)); in r5l_recovery_load_parity()
1969 r5l_recovery_verify_data_checksum(struct r5l_log *log, in r5l_recovery_verify_data_checksum() argument
1977 r5l_recovery_read_page(log, ctx, page, log_offset); in r5l_recovery_verify_data_checksum()
1979 checksum = crc32c_le(log->uuid_checksum, addr, PAGE_SIZE); in r5l_recovery_verify_data_checksum()
1989 r5l_recovery_verify_data_checksum_for_mb(struct r5l_log *log, in r5l_recovery_verify_data_checksum_for_mb() argument
1992 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_verify_data_checksum_for_mb()
1996 sector_t log_offset = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5l_recovery_verify_data_checksum_for_mb()
2011 log, ctx, page, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2016 log, ctx, page, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2021 log, ctx, page, in r5l_recovery_verify_data_checksum_for_mb()
2022 r5l_ring_add(log, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2036 log_offset = r5l_ring_add(log, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2062 r5c_recovery_analyze_meta_block(struct r5l_log *log, in r5c_recovery_analyze_meta_block() argument
2066 struct mddev *mddev = log->rdev->mddev; in r5c_recovery_analyze_meta_block()
2082 ret = r5l_recovery_verify_data_checksum_for_mb(log, ctx); in r5c_recovery_analyze_meta_block()
2090 log_offset = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5c_recovery_analyze_meta_block()
2173 r5l_recovery_load_data(log, sh, ctx, payload, in r5c_recovery_analyze_meta_block()
2176 r5l_recovery_load_parity(log, sh, ctx, payload, in r5c_recovery_analyze_meta_block()
2181 log_offset = r5l_ring_add(log, log_offset, in r5c_recovery_analyze_meta_block()
2196 static void r5c_recovery_load_one_stripe(struct r5l_log *log, in r5c_recovery_load_one_stripe() argument
2212 * Scan through the log for all to-be-flushed data
2227 static int r5c_recovery_flush_log(struct r5l_log *log, in r5c_recovery_flush_log() argument
2233 /* scan through the log */ in r5c_recovery_flush_log()
2235 if (r5l_recovery_read_meta_block(log, ctx)) in r5c_recovery_flush_log()
2238 ret = r5c_recovery_analyze_meta_block(log, ctx, in r5c_recovery_flush_log()
2247 ctx->pos = r5l_ring_add(log, ctx->pos, ctx->meta_total_blocks); in r5c_recovery_flush_log()
2261 r5c_recovery_load_one_stripe(log, sh); in r5c_recovery_flush_log()
2270 * log will start here. but we can't let superblock point to last valid
2271 * meta block. The log might looks like:
2283 * Before recovery, the log looks like the following
2286 * | valid log | invalid log |
2289 * |- log->last_checkpoint
2290 * |- log->last_cp_seq
2292 * Now we scan through the log until we see invalid entry
2295 * | valid log | invalid log |
2298 * |- log->last_checkpoint |- ctx->pos
2299 * |- log->last_cp_seq |- ctx->seq
2305 * | valid log | invalid log |
2308 * |- log->last_checkpoint |- ctx->pos+1
2309 * |- log->last_cp_seq |- ctx->seq+10001
2316 * | valid log | data only stripes | invalid log |
2319 * |- log->last_checkpoint |- ctx->pos+n
2320 * |- log->last_cp_seq |- ctx->seq+10000+n
2323 * again from log->last_checkpoint.
2328 * | old log | data only stripes | invalid log |
2331 * |- log->last_checkpoint |- ctx->pos+n
2332 * |- log->last_cp_seq |- ctx->seq+10000+n
2335 * point on, the recovery will start from new log->last_checkpoint.
2338 r5c_recovery_rewrite_data_only_stripes(struct r5l_log *log, in r5c_recovery_rewrite_data_only_stripes() argument
2342 struct mddev *mddev = log->rdev->mddev; in r5c_recovery_rewrite_data_only_stripes()
2362 r5l_recovery_create_empty_meta_block(log, page, in r5c_recovery_rewrite_data_only_stripes()
2366 write_pos = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5c_recovery_rewrite_data_only_stripes()
2382 crc32c_le(log->uuid_checksum, addr, in r5c_recovery_rewrite_data_only_stripes()
2385 sync_page_io(log->rdev, write_pos, PAGE_SIZE, in r5c_recovery_rewrite_data_only_stripes()
2387 write_pos = r5l_ring_add(log, write_pos, in r5c_recovery_rewrite_data_only_stripes()
2395 mb->checksum = cpu_to_le32(crc32c_le(log->uuid_checksum, in r5c_recovery_rewrite_data_only_stripes()
2397 sync_page_io(log->rdev, ctx->pos, PAGE_SIZE, page, in r5c_recovery_rewrite_data_only_stripes()
2400 list_add_tail(&sh->r5c, &log->stripe_in_journal_list); in r5c_recovery_rewrite_data_only_stripes()
2401 atomic_inc(&log->stripe_in_journal_count); in r5c_recovery_rewrite_data_only_stripes()
2406 log->next_checkpoint = next_checkpoint; in r5c_recovery_rewrite_data_only_stripes()
2411 static void r5c_recovery_flush_data_only_stripes(struct r5l_log *log, in r5c_recovery_flush_data_only_stripes() argument
2414 struct mddev *mddev = log->rdev->mddev; in r5c_recovery_flush_data_only_stripes()
2426 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_BACK; in r5c_recovery_flush_data_only_stripes()
2439 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; in r5c_recovery_flush_data_only_stripes()
2444 static int r5l_recovery_log(struct r5l_log *log) in r5l_recovery_log() argument
2446 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_log()
2455 ctx->pos = log->last_checkpoint; in r5l_recovery_log()
2456 ctx->seq = log->last_cp_seq; in r5l_recovery_log()
2465 if (r5l_recovery_allocate_ra_pool(log, ctx) != 0) { in r5l_recovery_log()
2470 ret = r5c_recovery_flush_log(log, ctx); in r5l_recovery_log()
2487 log->next_checkpoint = ctx->pos; in r5l_recovery_log()
2488 r5l_log_write_empty_meta_block(log, ctx->pos, ctx->seq++); in r5l_recovery_log()
2489 ctx->pos = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5l_recovery_log()
2490 } else if (r5c_recovery_rewrite_data_only_stripes(log, ctx)) { in r5l_recovery_log()
2497 log->log_start = ctx->pos; in r5l_recovery_log()
2498 log->seq = ctx->seq; in r5l_recovery_log()
2499 log->last_checkpoint = pos; in r5l_recovery_log()
2500 r5l_write_super(log, pos); in r5l_recovery_log()
2502 r5c_recovery_flush_data_only_stripes(log, ctx); in r5l_recovery_log()
2505 r5l_recovery_free_ra_pool(log, ctx); in r5l_recovery_log()
2513 static void r5l_write_super(struct r5l_log *log, sector_t cp) in r5l_write_super() argument
2515 struct mddev *mddev = log->rdev->mddev; in r5l_write_super()
2517 log->rdev->journal_tail = cp; in r5l_write_super()
2531 if (!conf || !conf->log) in r5c_journal_mode_show()
2534 switch (conf->log->r5c_journal_mode) { in r5c_journal_mode_show()
2571 if (!conf || !conf->log) in r5c_journal_mode_set()
2578 conf->log->r5c_journal_mode = mode; in r5c_journal_mode_set()
2628 struct r5l_log *log = READ_ONCE(conf->log); in r5c_try_caching_write() local
2637 BUG_ON(!r5c_is_writeback(log)); in r5c_try_caching_write()
2687 spin_lock(&log->tree_lock); in r5c_try_caching_write()
2688 pslot = radix_tree_lookup_slot(&log->big_stripe_tree, in r5c_try_caching_write()
2692 pslot, &log->tree_lock) >> in r5c_try_caching_write()
2695 &log->big_stripe_tree, pslot, in r5c_try_caching_write()
2703 &log->big_stripe_tree, tree_index, in r5c_try_caching_write()
2706 spin_unlock(&log->tree_lock); in r5c_try_caching_write()
2711 spin_unlock(&log->tree_lock); in r5c_try_caching_write()
2795 struct r5l_log *log = READ_ONCE(conf->log); in r5c_finish_stripe_write_out() local
2801 if (!log || !test_bit(R5_InJournal, &sh->dev[sh->pd_idx].flags)) in r5c_finish_stripe_write_out()
2807 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5c_finish_stripe_write_out()
2826 spin_lock_irq(&log->stripe_in_journal_lock); in r5c_finish_stripe_write_out()
2828 spin_unlock_irq(&log->stripe_in_journal_lock); in r5c_finish_stripe_write_out()
2831 atomic_dec(&log->stripe_in_journal_count); in r5c_finish_stripe_write_out()
2832 r5c_update_log_state(log); in r5c_finish_stripe_write_out()
2838 spin_lock(&log->tree_lock); in r5c_finish_stripe_write_out()
2839 pslot = radix_tree_lookup_slot(&log->big_stripe_tree, in r5c_finish_stripe_write_out()
2843 pslot, &log->tree_lock) >> in r5c_finish_stripe_write_out()
2846 radix_tree_delete(&log->big_stripe_tree, tree_index); in r5c_finish_stripe_write_out()
2849 &log->big_stripe_tree, pslot, in r5c_finish_stripe_write_out()
2851 spin_unlock(&log->tree_lock); in r5c_finish_stripe_write_out()
2866 r5l_append_flush_payload(log, sh->sector); in r5c_finish_stripe_write_out()
2872 int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh) in r5c_cache_data() argument
2880 BUG_ON(!log); in r5c_cache_data()
2888 sh->dev[i].log_checksum = crc32c_le(log->uuid_checksum, in r5c_cache_data()
2902 mutex_lock(&log->io_mutex); in r5c_cache_data()
2908 r5l_add_no_space_stripe(log, sh); in r5c_cache_data()
2909 else if (!r5l_has_free_space(log, reserve)) { in r5c_cache_data()
2910 if (sh->log_start == log->last_checkpoint) in r5c_cache_data()
2913 r5l_add_no_space_stripe(log, sh); in r5c_cache_data()
2915 ret = r5l_log_stripe(log, sh, pages, 0); in r5c_cache_data()
2917 spin_lock_irq(&log->io_list_lock); in r5c_cache_data()
2918 list_add_tail(&sh->log_list, &log->no_mem_stripes); in r5c_cache_data()
2919 spin_unlock_irq(&log->io_list_lock); in r5c_cache_data()
2923 mutex_unlock(&log->io_mutex); in r5c_cache_data()
2930 struct r5l_log *log = READ_ONCE(conf->log); in r5c_big_stripe_cached() local
2934 if (!log) in r5c_big_stripe_cached()
2938 slot = radix_tree_lookup(&log->big_stripe_tree, tree_index); in r5c_big_stripe_cached()
2942 static int r5l_load_log(struct r5l_log *log) in r5l_load_log() argument
2944 struct md_rdev *rdev = log->rdev; in r5l_load_log()
2947 sector_t cp = log->rdev->journal_tail; in r5l_load_log()
2972 expected_crc = crc32c_le(log->uuid_checksum, mb, PAGE_SIZE); in r5l_load_log()
2983 log->last_cp_seq = get_random_u32(); in r5l_load_log()
2985 r5l_log_write_empty_meta_block(log, cp, log->last_cp_seq); in r5l_load_log()
2987 * Make sure super points to correct address. Log might have in r5l_load_log()
2988 * data very soon. If super hasn't correct log tail address, in r5l_load_log()
2989 * recovery can't find the log in r5l_load_log()
2991 r5l_write_super(log, cp); in r5l_load_log()
2993 log->last_cp_seq = le64_to_cpu(mb->seq); in r5l_load_log()
2995 log->device_size = round_down(rdev->sectors, BLOCK_SECTORS); in r5l_load_log()
2996 log->max_free_space = log->device_size >> RECLAIM_MAX_FREE_SPACE_SHIFT; in r5l_load_log()
2997 if (log->max_free_space > RECLAIM_MAX_FREE_SPACE) in r5l_load_log()
2998 log->max_free_space = RECLAIM_MAX_FREE_SPACE; in r5l_load_log()
2999 log->last_checkpoint = cp; in r5l_load_log()
3004 log->log_start = r5l_ring_add(log, cp, BLOCK_SECTORS); in r5l_load_log()
3005 log->seq = log->last_cp_seq + 1; in r5l_load_log()
3006 log->next_checkpoint = cp; in r5l_load_log()
3008 ret = r5l_recovery_log(log); in r5l_load_log()
3010 r5c_update_log_state(log); in r5l_load_log()
3017 int r5l_start(struct r5l_log *log) in r5l_start() argument
3021 if (!log) in r5l_start()
3024 ret = r5l_load_log(log); in r5l_start()
3026 struct mddev *mddev = log->rdev->mddev; in r5l_start()
3037 struct r5l_log *log = READ_ONCE(conf->log); in r5c_update_on_rdev_error() local
3039 if (!log) in r5c_update_on_rdev_error()
3044 log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_BACK) in r5c_update_on_rdev_error()
3045 schedule_work(&log->disable_writeback_work); in r5c_update_on_rdev_error()
3050 struct r5l_log *log; in r5l_init_log() local
3075 log = kzalloc(sizeof(*log), GFP_KERNEL); in r5l_init_log()
3076 if (!log) in r5l_init_log()
3078 log->rdev = rdev; in r5l_init_log()
3079 log->need_cache_flush = bdev_write_cache(rdev->bdev); in r5l_init_log()
3080 log->uuid_checksum = crc32c_le(~0, rdev->mddev->uuid, in r5l_init_log()
3083 mutex_init(&log->io_mutex); in r5l_init_log()
3085 spin_lock_init(&log->io_list_lock); in r5l_init_log()
3086 INIT_LIST_HEAD(&log->running_ios); in r5l_init_log()
3087 INIT_LIST_HEAD(&log->io_end_ios); in r5l_init_log()
3088 INIT_LIST_HEAD(&log->flushing_ios); in r5l_init_log()
3089 INIT_LIST_HEAD(&log->finished_ios); in r5l_init_log()
3091 log->io_kc = KMEM_CACHE(r5l_io_unit, 0); in r5l_init_log()
3092 if (!log->io_kc) in r5l_init_log()
3095 ret = mempool_init_slab_pool(&log->io_pool, R5L_POOL_SIZE, log->io_kc); in r5l_init_log()
3099 ret = bioset_init(&log->bs, R5L_POOL_SIZE, 0, BIOSET_NEED_BVECS); in r5l_init_log()
3103 ret = mempool_init_page_pool(&log->meta_pool, R5L_POOL_SIZE, 0); in r5l_init_log()
3107 spin_lock_init(&log->tree_lock); in r5l_init_log()
3108 INIT_RADIX_TREE(&log->big_stripe_tree, GFP_NOWAIT | __GFP_NOWARN); in r5l_init_log()
3110 thread = md_register_thread(r5l_reclaim_thread, log->rdev->mddev, in r5l_init_log()
3116 rcu_assign_pointer(log->reclaim_thread, thread); in r5l_init_log()
3118 init_waitqueue_head(&log->iounit_wait); in r5l_init_log()
3120 INIT_LIST_HEAD(&log->no_mem_stripes); in r5l_init_log()
3122 INIT_LIST_HEAD(&log->no_space_stripes); in r5l_init_log()
3123 spin_lock_init(&log->no_space_stripes_lock); in r5l_init_log()
3125 INIT_WORK(&log->deferred_io_work, r5l_submit_io_async); in r5l_init_log()
3126 INIT_WORK(&log->disable_writeback_work, r5c_disable_writeback_async); in r5l_init_log()
3128 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; in r5l_init_log()
3129 INIT_LIST_HEAD(&log->stripe_in_journal_list); in r5l_init_log()
3130 spin_lock_init(&log->stripe_in_journal_lock); in r5l_init_log()
3131 atomic_set(&log->stripe_in_journal_count, 0); in r5l_init_log()
3133 WRITE_ONCE(conf->log, log); in r5l_init_log()
3139 mempool_exit(&log->meta_pool); in r5l_init_log()
3141 bioset_exit(&log->bs); in r5l_init_log()
3143 mempool_exit(&log->io_pool); in r5l_init_log()
3145 kmem_cache_destroy(log->io_kc); in r5l_init_log()
3147 kfree(log); in r5l_init_log()
3153 struct r5l_log *log = conf->log; in r5l_exit_log() local
3155 md_unregister_thread(conf->mddev, &log->reclaim_thread); in r5l_exit_log()
3158 * 'reconfig_mutex' is held by caller, set 'confg->log' to NULL to in r5l_exit_log()
3161 WRITE_ONCE(conf->log, NULL); in r5l_exit_log()
3163 flush_work(&log->disable_writeback_work); in r5l_exit_log()
3165 mempool_exit(&log->meta_pool); in r5l_exit_log()
3166 bioset_exit(&log->bs); in r5l_exit_log()
3167 mempool_exit(&log->io_pool); in r5l_exit_log()
3168 kmem_cache_destroy(log->io_kc); in r5l_exit_log()
3169 kfree(log); in r5l_exit_log()