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()
324 void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
331 if (!r5c_is_writeback(conf->log)) in r5c_check_stripe_cache_usage()
347 r5l_wake_reclaim(conf->log, 0); in r5c_check_stripe_cache_usage()
356 if (!r5c_is_writeback(conf->log)) in r5c_check_cached_full_stripe()
366 r5l_wake_reclaim(conf->log, 0); in r5c_check_cached_full_stripe()
370 * Total log space (in sectors) needed to flush all data in cache
372 * To avoid deadlock due to log space, it is necessary to reserve log
373 * space to flush critical stripes (stripes that occupying log space near
374 * last_checkpoint). This function helps check how much log space is
377 * To reduce log space requirements, two mechanisms are used to give cache
399 struct r5l_log *log = conf->log; in r5c_log_required_to_flush_cache() local
401 if (!r5c_is_writeback(log)) in r5c_log_required_to_flush_cache()
405 ((conf->max_degraded + 1) * atomic_read(&log->stripe_in_journal_count) + in r5c_log_required_to_flush_cache()
410 * evaluate log space usage and update R5C_LOG_TIGHT and R5C_LOG_CRITICAL
412 * R5C_LOG_TIGHT is set when free space on the log device is less than 3x of
413 * reclaim_required_space. R5C_LOG_CRITICAL is set when free space on the log
416 static inline void r5c_update_log_state(struct r5l_log *log) in r5c_update_log_state() argument
418 struct r5conf *conf = log->rdev->mddev->private; in r5c_update_log_state()
423 if (!r5c_is_writeback(log)) in r5c_update_log_state()
426 free_space = r5l_ring_distance(log, log->log_start, in r5c_update_log_state()
427 log->last_checkpoint); in r5c_update_log_state()
442 r5l_wake_reclaim(log, 0); in r5c_update_log_state()
452 struct r5l_log *log = conf->log; in r5c_make_stripe_write_out() local
454 BUG_ON(!r5c_is_writeback(log)); in r5c_make_stripe_write_out()
490 * log device. This is called from r5l_log_endio() or r5l_log_flush_endio().
494 struct r5l_log *log = sh->raid_conf->log; in r5c_finish_cache_stripe() local
496 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) { in r5c_finish_cache_stripe()
527 static void r5l_log_run_stripes(struct r5l_log *log) in r5l_log_run_stripes() argument
531 lockdep_assert_held(&log->io_list_lock); in r5l_log_run_stripes()
533 list_for_each_entry_safe(io, next, &log->running_ios, log_sibling) { in r5l_log_run_stripes()
538 list_move_tail(&io->log_sibling, &log->finished_ios); in r5l_log_run_stripes()
543 static void r5l_move_to_end_ios(struct r5l_log *log) in r5l_move_to_end_ios() argument
547 lockdep_assert_held(&log->io_list_lock); in r5l_move_to_end_ios()
549 list_for_each_entry_safe(io, next, &log->running_ios, log_sibling) { in r5l_move_to_end_ios()
553 list_move_tail(&io->log_sibling, &log->io_end_ios); in r5l_move_to_end_ios()
562 struct r5l_log *log = io->log; in r5l_log_endio() local
568 md_error(log->rdev->mddev, log->rdev); in r5l_log_endio()
571 mempool_free(io->meta_page, &log->meta_pool); in r5l_log_endio()
573 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_log_endio()
585 if (log->need_cache_flush && !list_empty(&io->stripe_list)) in r5l_log_endio()
586 r5l_move_to_end_ios(log); in r5l_log_endio()
588 r5l_log_run_stripes(log); in r5l_log_endio()
589 if (!list_empty(&log->running_ios)) { in r5l_log_endio()
594 io_deferred = list_first_entry(&log->running_ios, in r5l_log_endio()
597 schedule_work(&log->deferred_io_work); in r5l_log_endio()
600 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_log_endio()
602 if (log->need_cache_flush) in r5l_log_endio()
603 md_wakeup_thread(log->rdev->mddev->thread); in r5l_log_endio()
624 static void r5l_do_submit_io(struct r5l_log *log, struct r5l_io_unit *io) in r5l_do_submit_io() argument
628 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_do_submit_io()
630 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_do_submit_io()
661 struct r5l_log *log = container_of(work, struct r5l_log, in r5l_submit_io_async() local
666 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_submit_io_async()
667 if (!list_empty(&log->running_ios)) { in r5l_submit_io_async()
668 io = list_first_entry(&log->running_ios, struct r5l_io_unit, in r5l_submit_io_async()
675 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_submit_io_async()
677 r5l_do_submit_io(log, io); in r5l_submit_io_async()
682 struct r5l_log *log = container_of(work, struct r5l_log, in r5c_disable_writeback_async() local
684 struct mddev *mddev = log->rdev->mddev; in r5c_disable_writeback_async()
688 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5c_disable_writeback_async()
695 conf->log == NULL || in r5c_disable_writeback_async()
700 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; in r5c_disable_writeback_async()
706 static void r5l_submit_current_io(struct r5l_log *log) in r5l_submit_current_io() argument
708 struct r5l_io_unit *io = log->current_io; in r5l_submit_current_io()
719 crc = crc32c_le(log->uuid_checksum, block, PAGE_SIZE); in r5l_submit_current_io()
722 log->current_io = NULL; in r5l_submit_current_io()
723 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_submit_current_io()
725 if (io != list_first_entry(&log->running_ios, in r5l_submit_current_io()
731 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_submit_current_io()
733 r5l_do_submit_io(log, io); in r5l_submit_current_io()
736 static struct bio *r5l_bio_alloc(struct r5l_log *log) in r5l_bio_alloc() argument
738 struct bio *bio = bio_alloc_bioset(GFP_NOIO, BIO_MAX_PAGES, &log->bs); in r5l_bio_alloc()
741 bio_set_dev(bio, log->rdev->bdev); in r5l_bio_alloc()
742 bio->bi_iter.bi_sector = log->rdev->data_offset + log->log_start; in r5l_bio_alloc()
747 static void r5_reserve_log_entry(struct r5l_log *log, struct r5l_io_unit *io) in r5_reserve_log_entry() argument
749 log->log_start = r5l_ring_add(log, log->log_start, BLOCK_SECTORS); in r5_reserve_log_entry()
751 r5c_update_log_state(log); in r5_reserve_log_entry()
753 * If we filled up the log device start from the beginning again, in r5_reserve_log_entry()
756 * Note: for this to work properly the log size needs to me a multiple in r5_reserve_log_entry()
759 if (log->log_start == 0) in r5_reserve_log_entry()
762 io->log_end = log->log_start; in r5_reserve_log_entry()
765 static struct r5l_io_unit *r5l_new_meta(struct r5l_log *log) in r5l_new_meta() argument
770 io = mempool_alloc(&log->io_pool, GFP_ATOMIC); in r5l_new_meta()
775 io->log = log; in r5l_new_meta()
781 io->meta_page = mempool_alloc(&log->meta_pool, GFP_NOIO); in r5l_new_meta()
786 block->seq = cpu_to_le64(log->seq); in r5l_new_meta()
787 block->position = cpu_to_le64(log->log_start); in r5l_new_meta()
789 io->log_start = log->log_start; in r5l_new_meta()
791 io->seq = log->seq++; in r5l_new_meta()
793 io->current_bio = r5l_bio_alloc(log); in r5l_new_meta()
798 r5_reserve_log_entry(log, io); in r5l_new_meta()
800 spin_lock_irq(&log->io_list_lock); in r5l_new_meta()
801 list_add_tail(&io->log_sibling, &log->running_ios); in r5l_new_meta()
802 spin_unlock_irq(&log->io_list_lock); in r5l_new_meta()
807 static int r5l_get_meta(struct r5l_log *log, unsigned int payload_size) in r5l_get_meta() argument
809 if (log->current_io && in r5l_get_meta()
810 log->current_io->meta_offset + payload_size > PAGE_SIZE) in r5l_get_meta()
811 r5l_submit_current_io(log); in r5l_get_meta()
813 if (!log->current_io) { in r5l_get_meta()
814 log->current_io = r5l_new_meta(log); in r5l_get_meta()
815 if (!log->current_io) in r5l_get_meta()
822 static void r5l_append_payload_meta(struct r5l_log *log, u16 type, in r5l_append_payload_meta() argument
827 struct r5l_io_unit *io = log->current_io; in r5l_append_payload_meta()
844 static void r5l_append_payload_page(struct r5l_log *log, struct page *page) in r5l_append_payload_page() argument
846 struct r5l_io_unit *io = log->current_io; in r5l_append_payload_page()
851 io->current_bio = r5l_bio_alloc(log); in r5l_append_payload_page()
859 r5_reserve_log_entry(log, io); in r5l_append_payload_page()
862 static void r5l_append_flush_payload(struct r5l_log *log, sector_t sect) in r5l_append_flush_payload() argument
864 struct mddev *mddev = log->rdev->mddev; in r5l_append_flush_payload()
878 mutex_lock(&log->io_mutex); in r5l_append_flush_payload()
881 if (r5l_get_meta(log, meta_size)) { in r5l_append_flush_payload()
882 mutex_unlock(&log->io_mutex); in r5l_append_flush_payload()
887 io = log->current_io; in r5l_append_flush_payload()
899 mutex_unlock(&log->io_mutex); in r5l_append_flush_payload()
902 static int r5l_log_stripe(struct r5l_log *log, struct stripe_head *sh, in r5l_log_stripe() argument
916 ret = r5l_get_meta(log, meta_size); in r5l_log_stripe()
920 io = log->current_io; in r5l_log_stripe()
932 log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_BACK) { in r5l_log_stripe()
940 r5l_append_payload_meta(log, R5LOG_PAYLOAD_DATA, in r5l_log_stripe()
943 r5l_append_payload_page(log, sh->dev[i].page); in r5l_log_stripe()
947 r5l_append_payload_meta(log, R5LOG_PAYLOAD_PARITY, in r5l_log_stripe()
950 r5l_append_payload_page(log, sh->dev[sh->pd_idx].page); in r5l_log_stripe()
951 r5l_append_payload_page(log, sh->dev[sh->qd_idx].page); in r5l_log_stripe()
953 r5l_append_payload_meta(log, R5LOG_PAYLOAD_PARITY, in r5l_log_stripe()
956 r5l_append_payload_page(log, sh->dev[sh->pd_idx].page); in r5l_log_stripe()
964 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5l_log_stripe()
970 spin_lock_irq(&log->stripe_in_journal_lock); in r5l_log_stripe()
972 &log->stripe_in_journal_list); in r5l_log_stripe()
973 spin_unlock_irq(&log->stripe_in_journal_lock); in r5l_log_stripe()
974 atomic_inc(&log->stripe_in_journal_count); in r5l_log_stripe()
980 static inline void r5l_add_no_space_stripe(struct r5l_log *log, in r5l_add_no_space_stripe() argument
983 spin_lock(&log->no_space_stripes_lock); in r5l_add_no_space_stripe()
984 list_add_tail(&sh->log_list, &log->no_space_stripes); in r5l_add_no_space_stripe()
985 spin_unlock(&log->no_space_stripes_lock); in r5l_add_no_space_stripe()
990 * data from log to raid disks), so we shouldn't wait for reclaim here
992 int r5l_write_stripe(struct r5l_log *log, struct stripe_head *sh) in r5l_write_stripe() argument
1002 if (!log) in r5l_write_stripe()
1007 /* the stripe is written to log, we start writing it to raid */ in r5l_write_stripe()
1026 sh->dev[i].log_checksum = crc32c_le(log->uuid_checksum, in r5l_write_stripe()
1041 mutex_lock(&log->io_mutex); in r5l_write_stripe()
1045 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) { in r5l_write_stripe()
1046 if (!r5l_has_free_space(log, reserve)) { in r5l_write_stripe()
1047 r5l_add_no_space_stripe(log, sh); in r5l_write_stripe()
1050 ret = r5l_log_stripe(log, sh, data_pages, parity_pages); in r5l_write_stripe()
1052 spin_lock_irq(&log->io_list_lock); in r5l_write_stripe()
1054 &log->no_mem_stripes); in r5l_write_stripe()
1055 spin_unlock_irq(&log->io_list_lock); in r5l_write_stripe()
1060 * log space critical, do not process stripes that are in r5l_write_stripe()
1065 r5l_add_no_space_stripe(log, sh); in r5l_write_stripe()
1068 } else if (!r5l_has_free_space(log, reserve)) { in r5l_write_stripe()
1069 if (sh->log_start == log->last_checkpoint) in r5l_write_stripe()
1072 r5l_add_no_space_stripe(log, sh); in r5l_write_stripe()
1074 ret = r5l_log_stripe(log, sh, data_pages, parity_pages); in r5l_write_stripe()
1076 spin_lock_irq(&log->io_list_lock); in r5l_write_stripe()
1078 &log->no_mem_stripes); in r5l_write_stripe()
1079 spin_unlock_irq(&log->io_list_lock); in r5l_write_stripe()
1084 mutex_unlock(&log->io_mutex); in r5l_write_stripe()
1086 r5l_wake_reclaim(log, reserve); in r5l_write_stripe()
1090 void r5l_write_stripe_run(struct r5l_log *log) in r5l_write_stripe_run() argument
1092 if (!log) in r5l_write_stripe_run()
1094 mutex_lock(&log->io_mutex); in r5l_write_stripe_run()
1095 r5l_submit_current_io(log); in r5l_write_stripe_run()
1096 mutex_unlock(&log->io_mutex); in r5l_write_stripe_run()
1099 int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio) in r5l_handle_flush_request() argument
1101 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) { in r5l_handle_flush_request()
1104 * we flush log disk cache first, then write stripe data to in r5l_handle_flush_request()
1105 * raid disks. So if bio is finished, the log disk cache is in r5l_handle_flush_request()
1107 * the bio from log disk, so we don't need to flush again in r5l_handle_flush_request()
1117 mutex_lock(&log->io_mutex); in r5l_handle_flush_request()
1118 r5l_get_meta(log, 0); in r5l_handle_flush_request()
1119 bio_list_add(&log->current_io->flush_barriers, bio); in r5l_handle_flush_request()
1120 log->current_io->has_flush = 1; in r5l_handle_flush_request()
1121 log->current_io->has_null_flush = 1; in r5l_handle_flush_request()
1122 atomic_inc(&log->current_io->pending_stripe); in r5l_handle_flush_request()
1123 r5l_submit_current_io(log); in r5l_handle_flush_request()
1124 mutex_unlock(&log->io_mutex); in r5l_handle_flush_request()
1131 /* This will run after log space is reclaimed */
1132 static void r5l_run_no_space_stripes(struct r5l_log *log) in r5l_run_no_space_stripes() argument
1136 spin_lock(&log->no_space_stripes_lock); in r5l_run_no_space_stripes()
1137 while (!list_empty(&log->no_space_stripes)) { in r5l_run_no_space_stripes()
1138 sh = list_first_entry(&log->no_space_stripes, in r5l_run_no_space_stripes()
1144 spin_unlock(&log->no_space_stripes_lock); in r5l_run_no_space_stripes()
1149 * for write through mode, returns log->next_checkpoint
1155 struct r5l_log *log = conf->log; in r5c_calculate_new_cp() local
1159 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5c_calculate_new_cp()
1160 return log->next_checkpoint; in r5c_calculate_new_cp()
1162 spin_lock_irqsave(&log->stripe_in_journal_lock, flags); in r5c_calculate_new_cp()
1163 if (list_empty(&conf->log->stripe_in_journal_list)) { in r5c_calculate_new_cp()
1165 spin_unlock_irqrestore(&log->stripe_in_journal_lock, flags); in r5c_calculate_new_cp()
1166 return log->next_checkpoint; in r5c_calculate_new_cp()
1168 sh = list_first_entry(&conf->log->stripe_in_journal_list, in r5c_calculate_new_cp()
1171 spin_unlock_irqrestore(&log->stripe_in_journal_lock, flags); in r5c_calculate_new_cp()
1175 static sector_t r5l_reclaimable_space(struct r5l_log *log) in r5l_reclaimable_space() argument
1177 struct r5conf *conf = log->rdev->mddev->private; in r5l_reclaimable_space()
1179 return r5l_ring_distance(log, log->last_checkpoint, in r5l_reclaimable_space()
1183 static void r5l_run_no_mem_stripe(struct r5l_log *log) in r5l_run_no_mem_stripe() argument
1187 lockdep_assert_held(&log->io_list_lock); in r5l_run_no_mem_stripe()
1189 if (!list_empty(&log->no_mem_stripes)) { in r5l_run_no_mem_stripe()
1190 sh = list_first_entry(&log->no_mem_stripes, in r5l_run_no_mem_stripe()
1198 static bool r5l_complete_finished_ios(struct r5l_log *log) in r5l_complete_finished_ios() argument
1203 lockdep_assert_held(&log->io_list_lock); in r5l_complete_finished_ios()
1205 list_for_each_entry_safe(io, next, &log->finished_ios, log_sibling) { in r5l_complete_finished_ios()
1210 log->next_checkpoint = io->log_start; in r5l_complete_finished_ios()
1213 mempool_free(io, &log->io_pool); in r5l_complete_finished_ios()
1214 r5l_run_no_mem_stripe(log); in r5l_complete_finished_ios()
1224 struct r5l_log *log = io->log; in __r5l_stripe_write_finished() local
1225 struct r5conf *conf = log->rdev->mddev->private; in __r5l_stripe_write_finished()
1228 spin_lock_irqsave(&log->io_list_lock, flags); in __r5l_stripe_write_finished()
1231 if (!r5l_complete_finished_ios(log)) { in __r5l_stripe_write_finished()
1232 spin_unlock_irqrestore(&log->io_list_lock, flags); in __r5l_stripe_write_finished()
1236 if (r5l_reclaimable_space(log) > log->max_free_space || in __r5l_stripe_write_finished()
1238 r5l_wake_reclaim(log, 0); in __r5l_stripe_write_finished()
1240 spin_unlock_irqrestore(&log->io_list_lock, flags); in __r5l_stripe_write_finished()
1241 wake_up(&log->iounit_wait); in __r5l_stripe_write_finished()
1257 struct r5l_log *log = container_of(bio, struct r5l_log, in r5l_log_flush_endio() local
1263 md_error(log->rdev->mddev, log->rdev); in r5l_log_flush_endio()
1265 spin_lock_irqsave(&log->io_list_lock, flags); in r5l_log_flush_endio()
1266 list_for_each_entry(io, &log->flushing_ios, log_sibling) in r5l_log_flush_endio()
1268 list_splice_tail_init(&log->flushing_ios, &log->finished_ios); in r5l_log_flush_endio()
1269 spin_unlock_irqrestore(&log->io_list_lock, flags); in r5l_log_flush_endio()
1274 * io_unit(meta) consists of a log. There is one situation we want to avoid. A
1275 * broken meta in the middle of a log causes recovery can't find meta at the
1276 * head of log. If operations require meta at the head persistent in log, we
1277 * must make sure meta before it persistent in log too. A case is:
1279 * stripe data/parity is in log, we start write stripe to raid disks. stripe
1280 * data/parity must be persistent in log before we do the write to raid disks.
1284 * one whose data/parity is in log.
1286 void r5l_flush_stripe_to_raid(struct r5l_log *log) in r5l_flush_stripe_to_raid() argument
1290 if (!log || !log->need_cache_flush) in r5l_flush_stripe_to_raid()
1293 spin_lock_irq(&log->io_list_lock); in r5l_flush_stripe_to_raid()
1295 if (!list_empty(&log->flushing_ios)) { in r5l_flush_stripe_to_raid()
1296 spin_unlock_irq(&log->io_list_lock); in r5l_flush_stripe_to_raid()
1299 list_splice_tail_init(&log->io_end_ios, &log->flushing_ios); in r5l_flush_stripe_to_raid()
1300 do_flush = !list_empty(&log->flushing_ios); in r5l_flush_stripe_to_raid()
1301 spin_unlock_irq(&log->io_list_lock); in r5l_flush_stripe_to_raid()
1305 bio_reset(&log->flush_bio); in r5l_flush_stripe_to_raid()
1306 bio_set_dev(&log->flush_bio, log->rdev->bdev); in r5l_flush_stripe_to_raid()
1307 log->flush_bio.bi_end_io = r5l_log_flush_endio; in r5l_flush_stripe_to_raid()
1308 log->flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; in r5l_flush_stripe_to_raid()
1309 submit_bio(&log->flush_bio); in r5l_flush_stripe_to_raid()
1312 static void r5l_write_super(struct r5l_log *log, sector_t cp);
1313 static void r5l_write_super_and_discard_space(struct r5l_log *log, in r5l_write_super_and_discard_space() argument
1316 struct block_device *bdev = log->rdev->bdev; in r5l_write_super_and_discard_space()
1319 r5l_write_super(log, end); in r5l_write_super_and_discard_space()
1324 mddev = log->rdev->mddev; in r5l_write_super_and_discard_space()
1327 * superblock is updated to new log tail. Updating superblock (either in r5l_write_super_and_discard_space()
1344 if (log->last_checkpoint < end) { in r5l_write_super_and_discard_space()
1346 log->last_checkpoint + log->rdev->data_offset, in r5l_write_super_and_discard_space()
1347 end - log->last_checkpoint, GFP_NOIO, 0); in r5l_write_super_and_discard_space()
1350 log->last_checkpoint + log->rdev->data_offset, in r5l_write_super_and_discard_space()
1351 log->device_size - log->last_checkpoint, in r5l_write_super_and_discard_space()
1353 blkdev_issue_discard(bdev, log->rdev->data_offset, end, in r5l_write_super_and_discard_space()
1403 if (!conf->log) in r5c_flush_cache()
1424 struct r5l_log *log = conf->log; in r5c_do_reclaim() local
1432 if (!r5c_is_writeback(log)) in r5c_do_reclaim()
1466 /* if log space is tight, flush stripes on stripe_in_journal_list */ in r5c_do_reclaim()
1468 spin_lock_irqsave(&log->stripe_in_journal_lock, flags); in r5c_do_reclaim()
1470 list_for_each_entry(sh, &log->stripe_in_journal_list, r5c) { in r5c_do_reclaim()
1488 spin_unlock_irqrestore(&log->stripe_in_journal_lock, flags); in r5c_do_reclaim()
1492 r5l_run_no_space_stripes(log); in r5c_do_reclaim()
1497 static void r5l_do_reclaim(struct r5l_log *log) in r5l_do_reclaim() argument
1499 struct r5conf *conf = log->rdev->mddev->private; in r5l_do_reclaim()
1500 sector_t reclaim_target = xchg(&log->reclaim_target, 0); in r5l_do_reclaim()
1505 spin_lock_irq(&log->io_list_lock); in r5l_do_reclaim()
1506 write_super = r5l_reclaimable_space(log) > log->max_free_space || in r5l_do_reclaim()
1507 reclaim_target != 0 || !list_empty(&log->no_space_stripes); in r5l_do_reclaim()
1514 reclaimable = r5l_reclaimable_space(log); in r5l_do_reclaim()
1516 (list_empty(&log->running_ios) && in r5l_do_reclaim()
1517 list_empty(&log->io_end_ios) && in r5l_do_reclaim()
1518 list_empty(&log->flushing_ios) && in r5l_do_reclaim()
1519 list_empty(&log->finished_ios))) in r5l_do_reclaim()
1522 md_wakeup_thread(log->rdev->mddev->thread); in r5l_do_reclaim()
1523 wait_event_lock_irq(log->iounit_wait, in r5l_do_reclaim()
1524 r5l_reclaimable_space(log) > reclaimable, in r5l_do_reclaim()
1525 log->io_list_lock); in r5l_do_reclaim()
1529 spin_unlock_irq(&log->io_list_lock); in r5l_do_reclaim()
1536 * here, because the log area might be reused soon and we don't want to in r5l_do_reclaim()
1539 r5l_write_super_and_discard_space(log, next_checkpoint); in r5l_do_reclaim()
1541 mutex_lock(&log->io_mutex); in r5l_do_reclaim()
1542 log->last_checkpoint = next_checkpoint; in r5l_do_reclaim()
1543 r5c_update_log_state(log); in r5l_do_reclaim()
1544 mutex_unlock(&log->io_mutex); in r5l_do_reclaim()
1546 r5l_run_no_space_stripes(log); in r5l_do_reclaim()
1553 struct r5l_log *log = conf->log; in r5l_reclaim_thread() local
1555 if (!log) in r5l_reclaim_thread()
1558 r5l_do_reclaim(log); in r5l_reclaim_thread()
1561 void r5l_wake_reclaim(struct r5l_log *log, sector_t space) in r5l_wake_reclaim() argument
1566 if (!log) in r5l_wake_reclaim()
1569 target = log->reclaim_target; in r5l_wake_reclaim()
1572 } while (cmpxchg(&log->reclaim_target, target, new) != target); in r5l_wake_reclaim()
1573 md_wakeup_thread(log->reclaim_thread); in r5l_wake_reclaim()
1576 void r5l_quiesce(struct r5l_log *log, int quiesce) in r5l_quiesce() argument
1582 mddev = log->rdev->mddev; in r5l_quiesce()
1584 kthread_park(log->reclaim_thread->tsk); in r5l_quiesce()
1585 r5l_wake_reclaim(log, MaxSector); in r5l_quiesce()
1586 r5l_do_reclaim(log); in r5l_quiesce()
1588 kthread_unpark(log->reclaim_thread->tsk); in r5l_quiesce()
1593 struct r5l_log *log; in r5l_log_disk_error() local
1597 log = rcu_dereference(conf->log); in r5l_log_disk_error()
1599 if (!log) in r5l_log_disk_error()
1602 ret = test_bit(Faulty, &log->rdev->flags); in r5l_log_disk_error()
1620 * in recovery, log is read sequentially. It is not efficient to
1622 * reads multiple pages with one IO, so further log read can
1632 static int r5l_recovery_allocate_ra_pool(struct r5l_log *log, in r5l_recovery_allocate_ra_pool() argument
1637 ctx->ra_bio = bio_alloc_bioset(GFP_KERNEL, BIO_MAX_PAGES, &log->bs); in r5l_recovery_allocate_ra_pool()
1661 static void r5l_recovery_free_ra_pool(struct r5l_log *log, in r5l_recovery_free_ra_pool() argument
1677 static int r5l_recovery_fetch_ra_pool(struct r5l_log *log, in r5l_recovery_fetch_ra_pool() argument
1682 bio_set_dev(ctx->ra_bio, log->rdev->bdev); in r5l_recovery_fetch_ra_pool()
1684 ctx->ra_bio->bi_iter.bi_sector = log->rdev->data_offset + offset; in r5l_recovery_fetch_ra_pool()
1694 offset = r5l_ring_add(log, offset, BLOCK_SECTORS); in r5l_recovery_fetch_ra_pool()
1707 static int r5l_recovery_read_page(struct r5l_log *log, in r5l_recovery_read_page() argument
1716 ret = r5l_recovery_fetch_ra_pool(log, ctx, offset); in r5l_recovery_read_page()
1731 static int r5l_recovery_read_meta_block(struct r5l_log *log, in r5l_recovery_read_meta_block() argument
1739 ret = r5l_recovery_read_page(log, ctx, page, ctx->pos); in r5l_recovery_read_meta_block()
1753 crc = crc32c_le(log->uuid_checksum, mb, PAGE_SIZE); in r5l_recovery_read_meta_block()
1766 r5l_recovery_create_empty_meta_block(struct r5l_log *log, in r5l_recovery_create_empty_meta_block() argument
1781 static int r5l_log_write_empty_meta_block(struct r5l_log *log, sector_t pos, in r5l_log_write_empty_meta_block() argument
1790 r5l_recovery_create_empty_meta_block(log, page, pos, seq); in r5l_log_write_empty_meta_block()
1792 mb->checksum = cpu_to_le32(crc32c_le(log->uuid_checksum, in r5l_log_write_empty_meta_block()
1794 if (!sync_page_io(log->rdev, pos, PAGE_SIZE, page, REQ_OP_WRITE, in r5l_log_write_empty_meta_block()
1810 static void r5l_recovery_load_data(struct r5l_log *log, in r5l_recovery_load_data() argument
1816 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_load_data()
1823 r5l_recovery_read_page(log, ctx, sh->dev[dd_idx].page, log_offset); in r5l_recovery_load_data()
1832 static void r5l_recovery_load_parity(struct r5l_log *log, in r5l_recovery_load_parity() argument
1838 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_load_parity()
1842 r5l_recovery_read_page(log, ctx, sh->dev[sh->pd_idx].page, log_offset); in r5l_recovery_load_parity()
1849 log, ctx, sh->dev[sh->qd_idx].page, in r5l_recovery_load_parity()
1850 r5l_ring_add(log, log_offset, BLOCK_SECTORS)); in r5l_recovery_load_parity()
1983 r5l_recovery_verify_data_checksum(struct r5l_log *log, in r5l_recovery_verify_data_checksum() argument
1991 r5l_recovery_read_page(log, ctx, page, log_offset); in r5l_recovery_verify_data_checksum()
1993 checksum = crc32c_le(log->uuid_checksum, addr, PAGE_SIZE); in r5l_recovery_verify_data_checksum()
2003 r5l_recovery_verify_data_checksum_for_mb(struct r5l_log *log, in r5l_recovery_verify_data_checksum_for_mb() argument
2006 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_verify_data_checksum_for_mb()
2010 sector_t log_offset = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5l_recovery_verify_data_checksum_for_mb()
2025 log, ctx, page, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2030 log, ctx, page, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2035 log, ctx, page, in r5l_recovery_verify_data_checksum_for_mb()
2036 r5l_ring_add(log, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2050 log_offset = r5l_ring_add(log, log_offset, in r5l_recovery_verify_data_checksum_for_mb()
2076 r5c_recovery_analyze_meta_block(struct r5l_log *log, in r5c_recovery_analyze_meta_block() argument
2080 struct mddev *mddev = log->rdev->mddev; in r5c_recovery_analyze_meta_block()
2096 ret = r5l_recovery_verify_data_checksum_for_mb(log, ctx); in r5c_recovery_analyze_meta_block()
2104 log_offset = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5c_recovery_analyze_meta_block()
2187 r5l_recovery_load_data(log, sh, ctx, payload, in r5c_recovery_analyze_meta_block()
2190 r5l_recovery_load_parity(log, sh, ctx, payload, in r5c_recovery_analyze_meta_block()
2195 log_offset = r5l_ring_add(log, log_offset, in r5c_recovery_analyze_meta_block()
2210 static void r5c_recovery_load_one_stripe(struct r5l_log *log, in r5c_recovery_load_one_stripe() argument
2226 * Scan through the log for all to-be-flushed data
2241 static int r5c_recovery_flush_log(struct r5l_log *log, in r5c_recovery_flush_log() argument
2247 /* scan through the log */ in r5c_recovery_flush_log()
2249 if (r5l_recovery_read_meta_block(log, ctx)) in r5c_recovery_flush_log()
2252 ret = r5c_recovery_analyze_meta_block(log, ctx, in r5c_recovery_flush_log()
2261 ctx->pos = r5l_ring_add(log, ctx->pos, ctx->meta_total_blocks); in r5c_recovery_flush_log()
2275 r5c_recovery_load_one_stripe(log, sh); in r5c_recovery_flush_log()
2284 * log will start here. but we can't let superblock point to last valid
2285 * meta block. The log might looks like:
2297 * Before recovery, the log looks like the following
2300 * | valid log | invalid log |
2303 * |- log->last_checkpoint
2304 * |- log->last_cp_seq
2306 * Now we scan through the log until we see invalid entry
2309 * | valid log | invalid log |
2312 * |- log->last_checkpoint |- ctx->pos
2313 * |- log->last_cp_seq |- ctx->seq
2319 * | valid log | invalid log |
2322 * |- log->last_checkpoint |- ctx->pos+1
2323 * |- log->last_cp_seq |- ctx->seq+10001
2330 * | valid log | data only stripes | invalid log |
2333 * |- log->last_checkpoint |- ctx->pos+n
2334 * |- log->last_cp_seq |- ctx->seq+10000+n
2337 * again from log->last_checkpoint.
2342 * | old log | data only stripes | invalid log |
2345 * |- log->last_checkpoint |- ctx->pos+n
2346 * |- log->last_cp_seq |- ctx->seq+10000+n
2349 * point on, the recovery will start from new log->last_checkpoint.
2352 r5c_recovery_rewrite_data_only_stripes(struct r5l_log *log, in r5c_recovery_rewrite_data_only_stripes() argument
2356 struct mddev *mddev = log->rdev->mddev; in r5c_recovery_rewrite_data_only_stripes()
2376 r5l_recovery_create_empty_meta_block(log, page, in r5c_recovery_rewrite_data_only_stripes()
2380 write_pos = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5c_recovery_rewrite_data_only_stripes()
2396 crc32c_le(log->uuid_checksum, addr, in r5c_recovery_rewrite_data_only_stripes()
2399 sync_page_io(log->rdev, write_pos, PAGE_SIZE, in r5c_recovery_rewrite_data_only_stripes()
2401 write_pos = r5l_ring_add(log, write_pos, in r5c_recovery_rewrite_data_only_stripes()
2409 mb->checksum = cpu_to_le32(crc32c_le(log->uuid_checksum, in r5c_recovery_rewrite_data_only_stripes()
2411 sync_page_io(log->rdev, ctx->pos, PAGE_SIZE, page, in r5c_recovery_rewrite_data_only_stripes()
2414 list_add_tail(&sh->r5c, &log->stripe_in_journal_list); in r5c_recovery_rewrite_data_only_stripes()
2415 atomic_inc(&log->stripe_in_journal_count); in r5c_recovery_rewrite_data_only_stripes()
2420 log->next_checkpoint = next_checkpoint; in r5c_recovery_rewrite_data_only_stripes()
2425 static void r5c_recovery_flush_data_only_stripes(struct r5l_log *log, in r5c_recovery_flush_data_only_stripes() argument
2428 struct mddev *mddev = log->rdev->mddev; in r5c_recovery_flush_data_only_stripes()
2440 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_BACK; in r5c_recovery_flush_data_only_stripes()
2453 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; in r5c_recovery_flush_data_only_stripes()
2458 static int r5l_recovery_log(struct r5l_log *log) in r5l_recovery_log() argument
2460 struct mddev *mddev = log->rdev->mddev; in r5l_recovery_log()
2469 ctx->pos = log->last_checkpoint; in r5l_recovery_log()
2470 ctx->seq = log->last_cp_seq; in r5l_recovery_log()
2479 if (r5l_recovery_allocate_ra_pool(log, ctx) != 0) { in r5l_recovery_log()
2484 ret = r5c_recovery_flush_log(log, ctx); in r5l_recovery_log()
2501 log->next_checkpoint = ctx->pos; in r5l_recovery_log()
2502 r5l_log_write_empty_meta_block(log, ctx->pos, ctx->seq++); in r5l_recovery_log()
2503 ctx->pos = r5l_ring_add(log, ctx->pos, BLOCK_SECTORS); in r5l_recovery_log()
2504 } else if (r5c_recovery_rewrite_data_only_stripes(log, ctx)) { in r5l_recovery_log()
2511 log->log_start = ctx->pos; in r5l_recovery_log()
2512 log->seq = ctx->seq; in r5l_recovery_log()
2513 log->last_checkpoint = pos; in r5l_recovery_log()
2514 r5l_write_super(log, pos); in r5l_recovery_log()
2516 r5c_recovery_flush_data_only_stripes(log, ctx); in r5l_recovery_log()
2519 r5l_recovery_free_ra_pool(log, ctx); in r5l_recovery_log()
2527 static void r5l_write_super(struct r5l_log *log, sector_t cp) in r5l_write_super() argument
2529 struct mddev *mddev = log->rdev->mddev; in r5l_write_super()
2531 log->rdev->journal_tail = cp; in r5l_write_super()
2542 if (!conf || !conf->log) { in r5c_journal_mode_show()
2547 switch (conf->log->r5c_journal_mode) { in r5c_journal_mode_show()
2582 if (!conf || !conf->log) in r5c_journal_mode_set()
2590 conf->log->r5c_journal_mode = mode; in r5c_journal_mode_set()
2641 struct r5l_log *log = conf->log; in r5c_try_caching_write() local
2650 BUG_ON(!r5c_is_writeback(log)); in r5c_try_caching_write()
2700 spin_lock(&log->tree_lock); in r5c_try_caching_write()
2701 pslot = radix_tree_lookup_slot(&log->big_stripe_tree, in r5c_try_caching_write()
2705 pslot, &log->tree_lock) >> in r5c_try_caching_write()
2708 &log->big_stripe_tree, pslot, in r5c_try_caching_write()
2716 &log->big_stripe_tree, tree_index, in r5c_try_caching_write()
2719 spin_unlock(&log->tree_lock); in r5c_try_caching_write()
2724 spin_unlock(&log->tree_lock); in r5c_try_caching_write()
2808 struct r5l_log *log = conf->log; in r5c_finish_stripe_write_out() local
2815 if (!log || !test_bit(R5_InJournal, &sh->dev[sh->pd_idx].flags)) in r5c_finish_stripe_write_out()
2821 if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) in r5c_finish_stripe_write_out()
2843 spin_lock_irq(&log->stripe_in_journal_lock); in r5c_finish_stripe_write_out()
2845 spin_unlock_irq(&log->stripe_in_journal_lock); in r5c_finish_stripe_write_out()
2848 atomic_dec(&log->stripe_in_journal_count); in r5c_finish_stripe_write_out()
2849 r5c_update_log_state(log); in r5c_finish_stripe_write_out()
2855 spin_lock(&log->tree_lock); in r5c_finish_stripe_write_out()
2856 pslot = radix_tree_lookup_slot(&log->big_stripe_tree, in r5c_finish_stripe_write_out()
2860 pslot, &log->tree_lock) >> in r5c_finish_stripe_write_out()
2863 radix_tree_delete(&log->big_stripe_tree, tree_index); in r5c_finish_stripe_write_out()
2866 &log->big_stripe_tree, pslot, in r5c_finish_stripe_write_out()
2868 spin_unlock(&log->tree_lock); in r5c_finish_stripe_write_out()
2883 r5l_append_flush_payload(log, sh->sector); in r5c_finish_stripe_write_out()
2889 int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh) in r5c_cache_data() argument
2897 BUG_ON(!log); in r5c_cache_data()
2905 sh->dev[i].log_checksum = crc32c_le(log->uuid_checksum, in r5c_cache_data()
2919 mutex_lock(&log->io_mutex); in r5c_cache_data()
2925 r5l_add_no_space_stripe(log, sh); in r5c_cache_data()
2926 else if (!r5l_has_free_space(log, reserve)) { in r5c_cache_data()
2927 if (sh->log_start == log->last_checkpoint) in r5c_cache_data()
2930 r5l_add_no_space_stripe(log, sh); in r5c_cache_data()
2932 ret = r5l_log_stripe(log, sh, pages, 0); in r5c_cache_data()
2934 spin_lock_irq(&log->io_list_lock); in r5c_cache_data()
2935 list_add_tail(&sh->log_list, &log->no_mem_stripes); in r5c_cache_data()
2936 spin_unlock_irq(&log->io_list_lock); in r5c_cache_data()
2940 mutex_unlock(&log->io_mutex); in r5c_cache_data()
2947 struct r5l_log *log = conf->log; in r5c_big_stripe_cached() local
2951 if (!log) in r5c_big_stripe_cached()
2956 slot = radix_tree_lookup(&log->big_stripe_tree, tree_index); in r5c_big_stripe_cached()
2960 static int r5l_load_log(struct r5l_log *log) in r5l_load_log() argument
2962 struct md_rdev *rdev = log->rdev; in r5l_load_log()
2965 sector_t cp = log->rdev->journal_tail; in r5l_load_log()
2990 expected_crc = crc32c_le(log->uuid_checksum, mb, PAGE_SIZE); in r5l_load_log()
3001 log->last_cp_seq = prandom_u32(); in r5l_load_log()
3003 r5l_log_write_empty_meta_block(log, cp, log->last_cp_seq); in r5l_load_log()
3005 * Make sure super points to correct address. Log might have in r5l_load_log()
3006 * data very soon. If super hasn't correct log tail address, in r5l_load_log()
3007 * recovery can't find the log in r5l_load_log()
3009 r5l_write_super(log, cp); in r5l_load_log()
3011 log->last_cp_seq = le64_to_cpu(mb->seq); in r5l_load_log()
3013 log->device_size = round_down(rdev->sectors, BLOCK_SECTORS); in r5l_load_log()
3014 log->max_free_space = log->device_size >> RECLAIM_MAX_FREE_SPACE_SHIFT; in r5l_load_log()
3015 if (log->max_free_space > RECLAIM_MAX_FREE_SPACE) in r5l_load_log()
3016 log->max_free_space = RECLAIM_MAX_FREE_SPACE; in r5l_load_log()
3017 log->last_checkpoint = cp; in r5l_load_log()
3022 log->log_start = r5l_ring_add(log, cp, BLOCK_SECTORS); in r5l_load_log()
3023 log->seq = log->last_cp_seq + 1; in r5l_load_log()
3024 log->next_checkpoint = cp; in r5l_load_log()
3026 ret = r5l_recovery_log(log); in r5l_load_log()
3028 r5c_update_log_state(log); in r5l_load_log()
3035 int r5l_start(struct r5l_log *log) in r5l_start() argument
3039 if (!log) in r5l_start()
3042 ret = r5l_load_log(log); in r5l_start()
3044 struct mddev *mddev = log->rdev->mddev; in r5l_start()
3055 struct r5l_log *log = conf->log; in r5c_update_on_rdev_error() local
3057 if (!log) in r5c_update_on_rdev_error()
3062 conf->log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_BACK) in r5c_update_on_rdev_error()
3063 schedule_work(&log->disable_writeback_work); in r5c_update_on_rdev_error()
3069 struct r5l_log *log; in r5l_init_log() local
3094 log = kzalloc(sizeof(*log), GFP_KERNEL); in r5l_init_log()
3095 if (!log) in r5l_init_log()
3097 log->rdev = rdev; in r5l_init_log()
3099 log->need_cache_flush = test_bit(QUEUE_FLAG_WC, &q->queue_flags) != 0; in r5l_init_log()
3101 log->uuid_checksum = crc32c_le(~0, rdev->mddev->uuid, in r5l_init_log()
3104 mutex_init(&log->io_mutex); in r5l_init_log()
3106 spin_lock_init(&log->io_list_lock); in r5l_init_log()
3107 INIT_LIST_HEAD(&log->running_ios); in r5l_init_log()
3108 INIT_LIST_HEAD(&log->io_end_ios); in r5l_init_log()
3109 INIT_LIST_HEAD(&log->flushing_ios); in r5l_init_log()
3110 INIT_LIST_HEAD(&log->finished_ios); in r5l_init_log()
3111 bio_init(&log->flush_bio, NULL, 0); in r5l_init_log()
3113 log->io_kc = KMEM_CACHE(r5l_io_unit, 0); in r5l_init_log()
3114 if (!log->io_kc) in r5l_init_log()
3117 ret = mempool_init_slab_pool(&log->io_pool, R5L_POOL_SIZE, log->io_kc); in r5l_init_log()
3121 ret = bioset_init(&log->bs, R5L_POOL_SIZE, 0, BIOSET_NEED_BVECS); in r5l_init_log()
3125 ret = mempool_init_page_pool(&log->meta_pool, R5L_POOL_SIZE, 0); in r5l_init_log()
3129 spin_lock_init(&log->tree_lock); in r5l_init_log()
3130 INIT_RADIX_TREE(&log->big_stripe_tree, GFP_NOWAIT | __GFP_NOWARN); in r5l_init_log()
3132 log->reclaim_thread = md_register_thread(r5l_reclaim_thread, in r5l_init_log()
3133 log->rdev->mddev, "reclaim"); in r5l_init_log()
3134 if (!log->reclaim_thread) in r5l_init_log()
3136 log->reclaim_thread->timeout = R5C_RECLAIM_WAKEUP_INTERVAL; in r5l_init_log()
3138 init_waitqueue_head(&log->iounit_wait); in r5l_init_log()
3140 INIT_LIST_HEAD(&log->no_mem_stripes); in r5l_init_log()
3142 INIT_LIST_HEAD(&log->no_space_stripes); in r5l_init_log()
3143 spin_lock_init(&log->no_space_stripes_lock); in r5l_init_log()
3145 INIT_WORK(&log->deferred_io_work, r5l_submit_io_async); in r5l_init_log()
3146 INIT_WORK(&log->disable_writeback_work, r5c_disable_writeback_async); in r5l_init_log()
3148 log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; in r5l_init_log()
3149 INIT_LIST_HEAD(&log->stripe_in_journal_list); in r5l_init_log()
3150 spin_lock_init(&log->stripe_in_journal_lock); in r5l_init_log()
3151 atomic_set(&log->stripe_in_journal_count, 0); in r5l_init_log()
3153 rcu_assign_pointer(conf->log, log); in r5l_init_log()
3159 mempool_exit(&log->meta_pool); in r5l_init_log()
3161 bioset_exit(&log->bs); in r5l_init_log()
3163 mempool_exit(&log->io_pool); in r5l_init_log()
3165 kmem_cache_destroy(log->io_kc); in r5l_init_log()
3167 kfree(log); in r5l_init_log()
3173 struct r5l_log *log = conf->log; in r5l_exit_log() local
3175 conf->log = NULL; in r5l_exit_log()
3180 flush_work(&log->disable_writeback_work); in r5l_exit_log()
3181 md_unregister_thread(&log->reclaim_thread); in r5l_exit_log()
3182 mempool_exit(&log->meta_pool); in r5l_exit_log()
3183 bioset_exit(&log->bs); in r5l_exit_log()
3184 mempool_exit(&log->io_pool); in r5l_exit_log()
3185 kmem_cache_destroy(log->io_kc); in r5l_exit_log()
3186 kfree(log); in r5l_exit_log()