Lines Matching refs:wc
98 #define WC_MODE_PMEM(wc) ((wc)->pmem_mode) argument
99 #define WC_MODE_FUA(wc) ((wc)->writeback_fua) argument
101 #define WC_MODE_PMEM(wc) false argument
102 #define WC_MODE_FUA(wc) false argument
104 #define WC_MODE_SORT_FREELIST(wc) (!WC_MODE_PMEM(wc)) argument
190 struct dm_writecache *wc; member
201 struct dm_writecache *wc; member
210 static void wc_lock(struct dm_writecache *wc) in wc_lock() argument
212 mutex_lock(&wc->lock); in wc_lock()
215 static void wc_unlock(struct dm_writecache *wc) in wc_unlock() argument
217 mutex_unlock(&wc->lock); in wc_unlock()
221 static int persistent_memory_claim(struct dm_writecache *wc) in persistent_memory_claim() argument
230 wc->memory_vmapped = false; in persistent_memory_claim()
232 if (!wc->ssd_dev->dax_dev) { in persistent_memory_claim()
236 s = wc->memory_map_size; in persistent_memory_claim()
249 da = dax_direct_access(wc->ssd_dev->dax_dev, 0, p, &wc->memory_map, &pfn); in persistent_memory_claim()
251 wc->memory_map = NULL; in persistent_memory_claim()
256 wc->memory_map = NULL; in persistent_memory_claim()
262 wc->memory_map = NULL; in persistent_memory_claim()
271 daa = dax_direct_access(wc->ssd_dev->dax_dev, i, p - i, in persistent_memory_claim()
286 wc->memory_map = vmap(pages, p, VM_MAP, PAGE_KERNEL); in persistent_memory_claim()
287 if (!wc->memory_map) { in persistent_memory_claim()
292 wc->memory_vmapped = true; in persistent_memory_claim()
297 wc->memory_map += (size_t)wc->start_sector << SECTOR_SHIFT; in persistent_memory_claim()
298 wc->memory_map_size -= (size_t)wc->start_sector << SECTOR_SHIFT; in persistent_memory_claim()
309 static int persistent_memory_claim(struct dm_writecache *wc) in persistent_memory_claim() argument
315 static void persistent_memory_release(struct dm_writecache *wc) in persistent_memory_release() argument
317 if (wc->memory_vmapped) in persistent_memory_release()
318 vunmap(wc->memory_map - ((size_t)wc->start_sector << SECTOR_SHIFT)); in persistent_memory_release()
346 static struct wc_memory_superblock *sb(struct dm_writecache *wc) in sb() argument
348 return wc->memory_map; in sb()
351 static struct wc_memory_entry *memory_entry(struct dm_writecache *wc, struct wc_entry *e) in memory_entry() argument
354 return &sb(wc)->entries[e - wc->entries]; in memory_entry()
356 return &sb(wc)->entries[e->index]; in memory_entry()
359 static void *memory_data(struct dm_writecache *wc, struct wc_entry *e) in memory_data() argument
361 return (char *)wc->block_start + (e->index << wc->block_size_bits); in memory_data()
364 static sector_t cache_sector(struct dm_writecache *wc, struct wc_entry *e) in cache_sector() argument
366 return wc->start_sector + wc->metadata_sectors + in cache_sector()
367 ((sector_t)e->index << (wc->block_size_bits - SECTOR_SHIFT)); in cache_sector()
370 static uint64_t read_original_sector(struct dm_writecache *wc, struct wc_entry *e) in read_original_sector() argument
375 return le64_to_cpu(memory_entry(wc, e)->original_sector); in read_original_sector()
379 static uint64_t read_seq_count(struct dm_writecache *wc, struct wc_entry *e) in read_seq_count() argument
384 return le64_to_cpu(memory_entry(wc, e)->seq_count); in read_seq_count()
388 static void clear_seq_count(struct dm_writecache *wc, struct wc_entry *e) in clear_seq_count() argument
393 pmem_assign(memory_entry(wc, e)->seq_count, cpu_to_le64(-1)); in clear_seq_count()
396 static void write_original_sector_seq_count(struct dm_writecache *wc, struct wc_entry *e, in write_original_sector_seq_count() argument
406 pmem_assign(*memory_entry(wc, e), me); in write_original_sector_seq_count()
409 #define writecache_error(wc, err, msg, arg...) \ argument
411 if (!cmpxchg(&(wc)->error, 0, err)) \
413 wake_up(&(wc)->freelist_wait); \
416 #define writecache_has_error(wc) (unlikely(READ_ONCE((wc)->error))) argument
418 static void writecache_flush_all_metadata(struct dm_writecache *wc) in writecache_flush_all_metadata() argument
420 if (!WC_MODE_PMEM(wc)) in writecache_flush_all_metadata()
421 memset(wc->dirty_bitmap, -1, wc->dirty_bitmap_size); in writecache_flush_all_metadata()
424 static void writecache_flush_region(struct dm_writecache *wc, void *ptr, size_t size) in writecache_flush_region() argument
426 if (!WC_MODE_PMEM(wc)) in writecache_flush_region()
427 __set_bit(((char *)ptr - (char *)wc->memory_map) / BITMAP_GRANULARITY, in writecache_flush_region()
428 wc->dirty_bitmap); in writecache_flush_region()
431 static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev);
434 struct dm_writecache *wc; member
444 writecache_error(endio->wc, -EIO, "error writing metadata"); in writecache_notify_io()
450 static void ssd_commit_flushed(struct dm_writecache *wc) in ssd_commit_flushed() argument
455 wc, in ssd_commit_flushed()
459 unsigned bitmap_bits = wc->dirty_bitmap_size * 8; in ssd_commit_flushed()
464 i = find_next_bit(wc->dirty_bitmap, bitmap_bits, i); in ssd_commit_flushed()
467 j = find_next_zero_bit(wc->dirty_bitmap, bitmap_bits, i); in ssd_commit_flushed()
469 region.bdev = wc->ssd_dev->bdev; in ssd_commit_flushed()
473 if (unlikely(region.sector >= wc->metadata_sectors)) in ssd_commit_flushed()
475 if (unlikely(region.sector + region.count > wc->metadata_sectors)) in ssd_commit_flushed()
476 region.count = wc->metadata_sectors - region.sector; in ssd_commit_flushed()
478 region.sector += wc->start_sector; in ssd_commit_flushed()
483 req.mem.ptr.vma = (char *)wc->memory_map + (size_t)i * BITMAP_GRANULARITY; in ssd_commit_flushed()
484 req.client = wc->dm_io; in ssd_commit_flushed()
496 writecache_disk_flush(wc, wc->ssd_dev); in ssd_commit_flushed()
498 memset(wc->dirty_bitmap, 0, wc->dirty_bitmap_size); in ssd_commit_flushed()
501 static void writecache_commit_flushed(struct dm_writecache *wc) in writecache_commit_flushed() argument
503 if (WC_MODE_PMEM(wc)) in writecache_commit_flushed()
506 ssd_commit_flushed(wc); in writecache_commit_flushed()
509 static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev) in writecache_disk_flush() argument
522 req.client = wc->dm_io; in writecache_disk_flush()
527 writecache_error(wc, r, "error flushing metadata: %d", r); in writecache_disk_flush()
530 static void writecache_wait_for_ios(struct dm_writecache *wc, int direction) in writecache_wait_for_ios() argument
532 wait_event(wc->bio_in_progress_wait[direction], in writecache_wait_for_ios()
533 !atomic_read(&wc->bio_in_progress[direction])); in writecache_wait_for_ios()
539 static struct wc_entry *writecache_find_entry(struct dm_writecache *wc, in writecache_find_entry() argument
543 struct rb_node *node = wc->tree.rb_node; in writecache_find_entry()
550 if (read_original_sector(wc, e) == block) in writecache_find_entry()
552 node = (read_original_sector(wc, e) >= block ? in writecache_find_entry()
558 if (read_original_sector(wc, e) >= block) { in writecache_find_entry()
580 if (read_original_sector(wc, e2) != block) in writecache_find_entry()
586 static void writecache_insert_entry(struct dm_writecache *wc, struct wc_entry *ins) in writecache_insert_entry() argument
589 struct rb_node **node = &wc->tree.rb_node, *parent = NULL; in writecache_insert_entry()
594 if (read_original_sector(wc, e) > read_original_sector(wc, ins)) in writecache_insert_entry()
600 rb_insert_color(&ins->rb_node, &wc->tree); in writecache_insert_entry()
601 list_add(&ins->lru, &wc->lru); in writecache_insert_entry()
604 static void writecache_unlink(struct dm_writecache *wc, struct wc_entry *e) in writecache_unlink() argument
607 rb_erase(&e->rb_node, &wc->tree); in writecache_unlink()
610 static void writecache_add_to_freelist(struct dm_writecache *wc, struct wc_entry *e) in writecache_add_to_freelist() argument
612 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_add_to_freelist()
613 struct rb_node **node = &wc->freetree.rb_node, *parent = NULL; in writecache_add_to_freelist()
615 wc->current_free = e; in writecache_add_to_freelist()
624 rb_insert_color(&e->rb_node, &wc->freetree); in writecache_add_to_freelist()
626 list_add_tail(&e->lru, &wc->freelist); in writecache_add_to_freelist()
628 wc->freelist_size++; in writecache_add_to_freelist()
631 static struct wc_entry *writecache_pop_from_freelist(struct dm_writecache *wc) in writecache_pop_from_freelist() argument
635 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_pop_from_freelist()
637 if (unlikely(!wc->current_free)) in writecache_pop_from_freelist()
639 e = wc->current_free; in writecache_pop_from_freelist()
641 rb_erase(&e->rb_node, &wc->freetree); in writecache_pop_from_freelist()
643 next = rb_first(&wc->freetree); in writecache_pop_from_freelist()
644 wc->current_free = next ? container_of(next, struct wc_entry, rb_node) : NULL; in writecache_pop_from_freelist()
646 if (unlikely(list_empty(&wc->freelist))) in writecache_pop_from_freelist()
648 e = container_of(wc->freelist.next, struct wc_entry, lru); in writecache_pop_from_freelist()
651 wc->freelist_size--; in writecache_pop_from_freelist()
652 if (unlikely(wc->freelist_size + wc->writeback_size <= wc->freelist_high_watermark)) in writecache_pop_from_freelist()
653 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_pop_from_freelist()
658 static void writecache_free_entry(struct dm_writecache *wc, struct wc_entry *e) in writecache_free_entry() argument
660 writecache_unlink(wc, e); in writecache_free_entry()
661 writecache_add_to_freelist(wc, e); in writecache_free_entry()
662 clear_seq_count(wc, e); in writecache_free_entry()
663 writecache_flush_region(wc, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_free_entry()
664 if (unlikely(waitqueue_active(&wc->freelist_wait))) in writecache_free_entry()
665 wake_up(&wc->freelist_wait); in writecache_free_entry()
668 static void writecache_wait_on_freelist(struct dm_writecache *wc) in writecache_wait_on_freelist() argument
672 prepare_to_wait(&wc->freelist_wait, &wait, TASK_UNINTERRUPTIBLE); in writecache_wait_on_freelist()
673 wc_unlock(wc); in writecache_wait_on_freelist()
675 finish_wait(&wc->freelist_wait, &wait); in writecache_wait_on_freelist()
676 wc_lock(wc); in writecache_wait_on_freelist()
679 static void writecache_poison_lists(struct dm_writecache *wc) in writecache_poison_lists() argument
684 memset(&wc->tree, -1, sizeof wc->tree); in writecache_poison_lists()
685 wc->lru.next = LIST_POISON1; in writecache_poison_lists()
686 wc->lru.prev = LIST_POISON2; in writecache_poison_lists()
687 wc->freelist.next = LIST_POISON1; in writecache_poison_lists()
688 wc->freelist.prev = LIST_POISON2; in writecache_poison_lists()
691 static void writecache_flush_entry(struct dm_writecache *wc, struct wc_entry *e) in writecache_flush_entry() argument
693 writecache_flush_region(wc, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_flush_entry()
694 if (WC_MODE_PMEM(wc)) in writecache_flush_entry()
695 writecache_flush_region(wc, memory_data(wc, e), wc->block_size); in writecache_flush_entry()
698 static bool writecache_entry_is_committed(struct dm_writecache *wc, struct wc_entry *e) in writecache_entry_is_committed() argument
700 return read_seq_count(wc, e) < wc->seq_count; in writecache_entry_is_committed()
703 static void writecache_flush(struct dm_writecache *wc) in writecache_flush() argument
708 wc->uncommitted_blocks = 0; in writecache_flush()
709 del_timer(&wc->autocommit_timer); in writecache_flush()
711 if (list_empty(&wc->lru)) in writecache_flush()
714 e = container_of(wc->lru.next, struct wc_entry, lru); in writecache_flush()
715 if (writecache_entry_is_committed(wc, e)) { in writecache_flush()
716 if (wc->overwrote_committed) { in writecache_flush()
717 writecache_wait_for_ios(wc, WRITE); in writecache_flush()
718 writecache_disk_flush(wc, wc->ssd_dev); in writecache_flush()
719 wc->overwrote_committed = false; in writecache_flush()
724 writecache_flush_entry(wc, e); in writecache_flush()
725 if (unlikely(e->lru.next == &wc->lru)) in writecache_flush()
728 if (writecache_entry_is_committed(wc, e2)) in writecache_flush()
733 writecache_commit_flushed(wc); in writecache_flush()
735 writecache_wait_for_ios(wc, WRITE); in writecache_flush()
737 wc->seq_count++; in writecache_flush()
738 pmem_assign(sb(wc)->seq_count, cpu_to_le64(wc->seq_count)); in writecache_flush()
739 writecache_flush_region(wc, &sb(wc)->seq_count, sizeof sb(wc)->seq_count); in writecache_flush()
740 writecache_commit_flushed(wc); in writecache_flush()
742 wc->overwrote_committed = false; in writecache_flush()
751 if (read_original_sector(wc, e2) == read_original_sector(wc, e) && in writecache_flush()
753 writecache_free_entry(wc, e2); in writecache_flush()
757 if (unlikely(e->lru.prev == &wc->lru)) in writecache_flush()
764 writecache_commit_flushed(wc); in writecache_flush()
769 struct dm_writecache *wc = container_of(work, struct dm_writecache, flush_work); in writecache_flush_work() local
771 wc_lock(wc); in writecache_flush_work()
772 writecache_flush(wc); in writecache_flush_work()
773 wc_unlock(wc); in writecache_flush_work()
778 struct dm_writecache *wc = from_timer(wc, t, autocommit_timer); in writecache_autocommit_timer() local
779 if (!writecache_has_error(wc)) in writecache_autocommit_timer()
780 queue_work(wc->writeback_wq, &wc->flush_work); in writecache_autocommit_timer()
783 static void writecache_schedule_autocommit(struct dm_writecache *wc) in writecache_schedule_autocommit() argument
785 if (!timer_pending(&wc->autocommit_timer)) in writecache_schedule_autocommit()
786 mod_timer(&wc->autocommit_timer, jiffies + wc->autocommit_jiffies); in writecache_schedule_autocommit()
789 static void writecache_discard(struct dm_writecache *wc, sector_t start, sector_t end) in writecache_discard() argument
794 e = writecache_find_entry(wc, start, WFE_RETURN_FOLLOWING | WFE_LOWEST_SEQ); in writecache_discard()
798 while (read_original_sector(wc, e) < end) { in writecache_discard()
803 writecache_wait_for_ios(wc, READ); in writecache_discard()
804 writecache_wait_for_ios(wc, WRITE); in writecache_discard()
807 writecache_free_entry(wc, e); in writecache_discard()
817 writecache_commit_flushed(wc); in writecache_discard()
820 static bool writecache_wait_for_writeback(struct dm_writecache *wc) in writecache_wait_for_writeback() argument
822 if (wc->writeback_size) { in writecache_wait_for_writeback()
823 writecache_wait_on_freelist(wc); in writecache_wait_for_writeback()
831 struct dm_writecache *wc = ti->private; in writecache_suspend() local
834 del_timer_sync(&wc->autocommit_timer); in writecache_suspend()
836 wc_lock(wc); in writecache_suspend()
837 writecache_flush(wc); in writecache_suspend()
838 flush_on_suspend = wc->flush_on_suspend; in writecache_suspend()
840 wc->flush_on_suspend = false; in writecache_suspend()
841 wc->writeback_all++; in writecache_suspend()
842 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_suspend()
844 wc_unlock(wc); in writecache_suspend()
846 flush_workqueue(wc->writeback_wq); in writecache_suspend()
848 wc_lock(wc); in writecache_suspend()
850 wc->writeback_all--; in writecache_suspend()
851 while (writecache_wait_for_writeback(wc)); in writecache_suspend()
853 if (WC_MODE_PMEM(wc)) in writecache_suspend()
854 persistent_memory_flush_cache(wc->memory_map, wc->memory_map_size); in writecache_suspend()
856 writecache_poison_lists(wc); in writecache_suspend()
858 wc_unlock(wc); in writecache_suspend()
861 static int writecache_alloc_entries(struct dm_writecache *wc) in writecache_alloc_entries() argument
865 if (wc->entries) in writecache_alloc_entries()
867 wc->entries = vmalloc(array_size(sizeof(struct wc_entry), wc->n_blocks)); in writecache_alloc_entries()
868 if (!wc->entries) in writecache_alloc_entries()
870 for (b = 0; b < wc->n_blocks; b++) { in writecache_alloc_entries()
871 struct wc_entry *e = &wc->entries[b]; in writecache_alloc_entries()
881 struct dm_writecache *wc = ti->private; in writecache_resume() local
887 wc_lock(wc); in writecache_resume()
889 if (WC_MODE_PMEM(wc)) in writecache_resume()
890 persistent_memory_invalidate_cache(wc->memory_map, wc->memory_map_size); in writecache_resume()
892 wc->tree = RB_ROOT; in writecache_resume()
893 INIT_LIST_HEAD(&wc->lru); in writecache_resume()
894 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_resume()
895 wc->freetree = RB_ROOT; in writecache_resume()
896 wc->current_free = NULL; in writecache_resume()
898 INIT_LIST_HEAD(&wc->freelist); in writecache_resume()
900 wc->freelist_size = 0; in writecache_resume()
902 r = memcpy_mcsafe(&sb_seq_count, &sb(wc)->seq_count, sizeof(uint64_t)); in writecache_resume()
904 writecache_error(wc, r, "hardware memory error when reading superblock: %d", r); in writecache_resume()
907 wc->seq_count = le64_to_cpu(sb_seq_count); in writecache_resume()
910 for (b = 0; b < wc->n_blocks; b++) { in writecache_resume()
911 struct wc_entry *e = &wc->entries[b]; in writecache_resume()
913 if (writecache_has_error(wc)) { in writecache_resume()
918 r = memcpy_mcsafe(&wme, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_resume()
920 writecache_error(wc, r, "hardware memory error when reading metadata entry %lu: %d", in writecache_resume()
930 for (b = 0; b < wc->n_blocks; b++) { in writecache_resume()
931 struct wc_entry *e = &wc->entries[b]; in writecache_resume()
932 if (!writecache_entry_is_committed(wc, e)) { in writecache_resume()
933 if (read_seq_count(wc, e) != -1) { in writecache_resume()
935 clear_seq_count(wc, e); in writecache_resume()
938 writecache_add_to_freelist(wc, e); in writecache_resume()
942 old = writecache_find_entry(wc, read_original_sector(wc, e), 0); in writecache_resume()
944 writecache_insert_entry(wc, e); in writecache_resume()
946 if (read_seq_count(wc, old) == read_seq_count(wc, e)) { in writecache_resume()
947 writecache_error(wc, -EINVAL, in writecache_resume()
949 (unsigned long long)b, (unsigned long long)read_original_sector(wc, e), in writecache_resume()
950 (unsigned long long)read_seq_count(wc, e)); in writecache_resume()
952 if (read_seq_count(wc, old) > read_seq_count(wc, e)) { in writecache_resume()
955 writecache_free_entry(wc, old); in writecache_resume()
956 writecache_insert_entry(wc, e); in writecache_resume()
965 writecache_flush_all_metadata(wc); in writecache_resume()
966 writecache_commit_flushed(wc); in writecache_resume()
969 wc_unlock(wc); in writecache_resume()
972 static int process_flush_mesg(unsigned argc, char **argv, struct dm_writecache *wc) in process_flush_mesg() argument
977 wc_lock(wc); in process_flush_mesg()
978 if (dm_suspended(wc->ti)) { in process_flush_mesg()
979 wc_unlock(wc); in process_flush_mesg()
982 if (writecache_has_error(wc)) { in process_flush_mesg()
983 wc_unlock(wc); in process_flush_mesg()
987 writecache_flush(wc); in process_flush_mesg()
988 wc->writeback_all++; in process_flush_mesg()
989 queue_work(wc->writeback_wq, &wc->writeback_work); in process_flush_mesg()
990 wc_unlock(wc); in process_flush_mesg()
992 flush_workqueue(wc->writeback_wq); in process_flush_mesg()
994 wc_lock(wc); in process_flush_mesg()
995 wc->writeback_all--; in process_flush_mesg()
996 if (writecache_has_error(wc)) { in process_flush_mesg()
997 wc_unlock(wc); in process_flush_mesg()
1000 wc_unlock(wc); in process_flush_mesg()
1005 static int process_flush_on_suspend_mesg(unsigned argc, char **argv, struct dm_writecache *wc) in process_flush_on_suspend_mesg() argument
1010 wc_lock(wc); in process_flush_on_suspend_mesg()
1011 wc->flush_on_suspend = true; in process_flush_on_suspend_mesg()
1012 wc_unlock(wc); in process_flush_on_suspend_mesg()
1021 struct dm_writecache *wc = ti->private; in writecache_message() local
1024 r = process_flush_mesg(argc, argv, wc); in writecache_message()
1026 r = process_flush_on_suspend_mesg(argc, argv, wc); in writecache_message()
1033 static void bio_copy_block(struct dm_writecache *wc, struct bio *bio, void *data) in bio_copy_block() argument
1039 unsigned remaining_size = wc->block_size; in bio_copy_block()
1053 writecache_error(wc, r, "hardware memory error when reading data: %d", r); in bio_copy_block()
1071 struct dm_writecache *wc = data; in writecache_flush_thread() local
1076 wc_lock(wc); in writecache_flush_thread()
1077 bio = bio_list_pop(&wc->flush_list); in writecache_flush_thread()
1080 wc_unlock(wc); in writecache_flush_thread()
1092 writecache_discard(wc, bio->bi_iter.bi_sector, in writecache_flush_thread()
1094 wc_unlock(wc); in writecache_flush_thread()
1095 bio_set_dev(bio, wc->dev->bdev); in writecache_flush_thread()
1098 writecache_flush(wc); in writecache_flush_thread()
1099 wc_unlock(wc); in writecache_flush_thread()
1100 if (writecache_has_error(wc)) in writecache_flush_thread()
1109 static void writecache_offload_bio(struct dm_writecache *wc, struct bio *bio) in writecache_offload_bio() argument
1111 if (bio_list_empty(&wc->flush_list)) in writecache_offload_bio()
1112 wake_up_process(wc->flush_thread); in writecache_offload_bio()
1113 bio_list_add(&wc->flush_list, bio); in writecache_offload_bio()
1119 struct dm_writecache *wc = ti->private; in writecache_map() local
1123 wc_lock(wc); in writecache_map()
1126 if (writecache_has_error(wc)) in writecache_map()
1128 if (WC_MODE_PMEM(wc)) { in writecache_map()
1129 writecache_flush(wc); in writecache_map()
1130 if (writecache_has_error(wc)) in writecache_map()
1134 writecache_offload_bio(wc, bio); in writecache_map()
1142 (wc->block_size / 512 - 1)) != 0)) { in writecache_map()
1145 bio->bi_iter.bi_size, wc->block_size); in writecache_map()
1150 if (writecache_has_error(wc)) in writecache_map()
1152 if (WC_MODE_PMEM(wc)) { in writecache_map()
1153 writecache_discard(wc, bio->bi_iter.bi_sector, bio_end_sector(bio)); in writecache_map()
1156 writecache_offload_bio(wc, bio); in writecache_map()
1163 e = writecache_find_entry(wc, bio->bi_iter.bi_sector, WFE_RETURN_FOLLOWING); in writecache_map()
1164 if (e && read_original_sector(wc, e) == bio->bi_iter.bi_sector) { in writecache_map()
1165 if (WC_MODE_PMEM(wc)) { in writecache_map()
1166 bio_copy_block(wc, bio, memory_data(wc, e)); in writecache_map()
1171 dm_accept_partial_bio(bio, wc->block_size >> SECTOR_SHIFT); in writecache_map()
1172 bio_set_dev(bio, wc->ssd_dev->bdev); in writecache_map()
1173 bio->bi_iter.bi_sector = cache_sector(wc, e); in writecache_map()
1174 if (!writecache_entry_is_committed(wc, e)) in writecache_map()
1175 writecache_wait_for_ios(wc, WRITE); in writecache_map()
1181 read_original_sector(wc, e) - bio->bi_iter.bi_sector; in writecache_map()
1190 if (writecache_has_error(wc)) in writecache_map()
1192 e = writecache_find_entry(wc, bio->bi_iter.bi_sector, 0); in writecache_map()
1194 if (!writecache_entry_is_committed(wc, e)) in writecache_map()
1196 if (!WC_MODE_PMEM(wc) && !e->write_in_progress) { in writecache_map()
1197 wc->overwrote_committed = true; in writecache_map()
1201 e = writecache_pop_from_freelist(wc); in writecache_map()
1203 writecache_wait_on_freelist(wc); in writecache_map()
1206 write_original_sector_seq_count(wc, e, bio->bi_iter.bi_sector, wc->seq_count); in writecache_map()
1207 writecache_insert_entry(wc, e); in writecache_map()
1208 wc->uncommitted_blocks++; in writecache_map()
1210 if (WC_MODE_PMEM(wc)) { in writecache_map()
1211 bio_copy_block(wc, bio, memory_data(wc, e)); in writecache_map()
1213 dm_accept_partial_bio(bio, wc->block_size >> SECTOR_SHIFT); in writecache_map()
1214 bio_set_dev(bio, wc->ssd_dev->bdev); in writecache_map()
1215 bio->bi_iter.bi_sector = cache_sector(wc, e); in writecache_map()
1216 if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks)) { in writecache_map()
1217 wc->uncommitted_blocks = 0; in writecache_map()
1218 queue_work(wc->writeback_wq, &wc->flush_work); in writecache_map()
1220 writecache_schedule_autocommit(wc); in writecache_map()
1226 if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks)) in writecache_map()
1227 writecache_flush(wc); in writecache_map()
1229 writecache_schedule_autocommit(wc); in writecache_map()
1234 bio_set_dev(bio, wc->dev->bdev); in writecache_map()
1235 wc_unlock(wc); in writecache_map()
1241 atomic_inc(&wc->bio_in_progress[bio_data_dir(bio)]); in writecache_map()
1242 wc_unlock(wc); in writecache_map()
1246 wc_unlock(wc); in writecache_map()
1251 wc_unlock(wc); in writecache_map()
1255 wc_unlock(wc); in writecache_map()
1262 struct dm_writecache *wc = ti->private; in writecache_end_io() local
1266 if (atomic_dec_and_test(&wc->bio_in_progress[dir])) in writecache_end_io()
1267 if (unlikely(waitqueue_active(&wc->bio_in_progress_wait[dir]))) in writecache_end_io()
1268 wake_up(&wc->bio_in_progress_wait[dir]); in writecache_end_io()
1276 struct dm_writecache *wc = ti->private; in writecache_iterate_devices() local
1278 return fn(ti, wc->dev, 0, ti->len, data); in writecache_iterate_devices()
1283 struct dm_writecache *wc = ti->private; in writecache_io_hints() local
1285 if (limits->logical_block_size < wc->block_size) in writecache_io_hints()
1286 limits->logical_block_size = wc->block_size; in writecache_io_hints()
1288 if (limits->physical_block_size < wc->block_size) in writecache_io_hints()
1289 limits->physical_block_size = wc->block_size; in writecache_io_hints()
1291 if (limits->io_min < wc->block_size) in writecache_io_hints()
1292 limits->io_min = wc->block_size; in writecache_io_hints()
1299 struct dm_writecache *wc = wb->wc; in writecache_writeback_endio() local
1302 raw_spin_lock_irqsave(&wc->endio_list_lock, flags); in writecache_writeback_endio()
1303 if (unlikely(list_empty(&wc->endio_list))) in writecache_writeback_endio()
1304 wake_up_process(wc->endio_thread); in writecache_writeback_endio()
1305 list_add_tail(&wb->endio_entry, &wc->endio_list); in writecache_writeback_endio()
1306 raw_spin_unlock_irqrestore(&wc->endio_list_lock, flags); in writecache_writeback_endio()
1312 struct dm_writecache *wc = c->wc; in writecache_copy_endio() local
1316 raw_spin_lock_irq(&wc->endio_list_lock); in writecache_copy_endio()
1317 if (unlikely(list_empty(&wc->endio_list))) in writecache_copy_endio()
1318 wake_up_process(wc->endio_thread); in writecache_copy_endio()
1319 list_add_tail(&c->endio_entry, &wc->endio_list); in writecache_copy_endio()
1320 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_copy_endio()
1323 static void __writecache_endio_pmem(struct dm_writecache *wc, struct list_head *list) in __writecache_endio_pmem() argument
1335 writecache_error(wc, blk_status_to_errno(wb->bio.bi_status), in __writecache_endio_pmem()
1343 if (!writecache_has_error(wc)) in __writecache_endio_pmem()
1344 writecache_free_entry(wc, e); in __writecache_endio_pmem()
1345 BUG_ON(!wc->writeback_size); in __writecache_endio_pmem()
1346 wc->writeback_size--; in __writecache_endio_pmem()
1349 writecache_commit_flushed(wc); in __writecache_endio_pmem()
1350 wc_unlock(wc); in __writecache_endio_pmem()
1351 wc_lock(wc); in __writecache_endio_pmem()
1362 static void __writecache_endio_ssd(struct dm_writecache *wc, struct list_head *list) in __writecache_endio_ssd() argument
1372 writecache_error(wc, c->error, "copy error"); in __writecache_endio_ssd()
1379 if (!writecache_has_error(wc)) in __writecache_endio_ssd()
1380 writecache_free_entry(wc, e); in __writecache_endio_ssd()
1382 BUG_ON(!wc->writeback_size); in __writecache_endio_ssd()
1383 wc->writeback_size--; in __writecache_endio_ssd()
1386 mempool_free(c, &wc->copy_pool); in __writecache_endio_ssd()
1392 struct dm_writecache *wc = data; in writecache_endio_thread() local
1397 raw_spin_lock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1398 if (!list_empty(&wc->endio_list)) in writecache_endio_thread()
1401 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1413 list = wc->endio_list; in writecache_endio_thread()
1415 INIT_LIST_HEAD(&wc->endio_list); in writecache_endio_thread()
1416 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1418 if (!WC_MODE_FUA(wc)) in writecache_endio_thread()
1419 writecache_disk_flush(wc, wc->dev); in writecache_endio_thread()
1421 wc_lock(wc); in writecache_endio_thread()
1423 if (WC_MODE_PMEM(wc)) { in writecache_endio_thread()
1424 __writecache_endio_pmem(wc, &list); in writecache_endio_thread()
1426 __writecache_endio_ssd(wc, &list); in writecache_endio_thread()
1427 writecache_wait_for_ios(wc, READ); in writecache_endio_thread()
1430 writecache_commit_flushed(wc); in writecache_endio_thread()
1432 wc_unlock(wc); in writecache_endio_thread()
1440 struct dm_writecache *wc = wb->wc; in wc_add_block() local
1441 unsigned block_size = wc->block_size; in wc_add_block()
1442 void *address = memory_data(wc, e); in wc_add_block()
1454 static void __writeback_throttle(struct dm_writecache *wc, struct writeback_list *wbl) in __writeback_throttle() argument
1456 if (unlikely(wc->max_writeback_jobs)) { in __writeback_throttle()
1457 if (READ_ONCE(wc->writeback_size) - wbl->size >= wc->max_writeback_jobs) { in __writeback_throttle()
1458 wc_lock(wc); in __writeback_throttle()
1459 while (wc->writeback_size - wbl->size >= wc->max_writeback_jobs) in __writeback_throttle()
1460 writecache_wait_on_freelist(wc); in __writeback_throttle()
1461 wc_unlock(wc); in __writeback_throttle()
1467 static void __writecache_writeback_pmem(struct dm_writecache *wc, struct writeback_list *wbl) in __writecache_writeback_pmem() argument
1481 bio = bio_alloc_bioset(GFP_NOIO, max_pages, &wc->bio_set); in __writecache_writeback_pmem()
1483 wb->wc = wc; in __writecache_writeback_pmem()
1485 bio_set_dev(&wb->bio, wc->dev->bdev); in __writecache_writeback_pmem()
1486 wb->bio.bi_iter.bi_sector = read_original_sector(wc, e); in __writecache_writeback_pmem()
1503 if (read_original_sector(wc, f) != in __writecache_writeback_pmem()
1504 read_original_sector(wc, e) + (wc->block_size >> SECTOR_SHIFT)) in __writecache_writeback_pmem()
1513 bio_set_op_attrs(&wb->bio, REQ_OP_WRITE, WC_MODE_FUA(wc) * REQ_FUA); in __writecache_writeback_pmem()
1514 if (writecache_has_error(wc)) { in __writecache_writeback_pmem()
1521 __writeback_throttle(wc, wbl); in __writecache_writeback_pmem()
1525 static void __writecache_writeback_ssd(struct dm_writecache *wc, struct writeback_list *wbl) in __writecache_writeback_ssd() argument
1538 n_sectors = e->wc_list_contiguous << (wc->block_size_bits - SECTOR_SHIFT); in __writecache_writeback_ssd()
1540 from.bdev = wc->ssd_dev->bdev; in __writecache_writeback_ssd()
1541 from.sector = cache_sector(wc, e); in __writecache_writeback_ssd()
1543 to.bdev = wc->dev->bdev; in __writecache_writeback_ssd()
1544 to.sector = read_original_sector(wc, e); in __writecache_writeback_ssd()
1547 c = mempool_alloc(&wc->copy_pool, GFP_NOIO); in __writecache_writeback_ssd()
1548 c->wc = wc; in __writecache_writeback_ssd()
1552 while ((n_sectors -= wc->block_size >> SECTOR_SHIFT)) { in __writecache_writeback_ssd()
1560 dm_kcopyd_copy(wc->dm_kcopyd, &from, 1, &to, 0, writecache_copy_endio, c); in __writecache_writeback_ssd()
1562 __writeback_throttle(wc, wbl); in __writecache_writeback_ssd()
1568 struct dm_writecache *wc = container_of(work, struct dm_writecache, writeback_work); in writecache_writeback() local
1576 wc_lock(wc); in writecache_writeback()
1578 if (writecache_has_error(wc)) { in writecache_writeback()
1579 wc_unlock(wc); in writecache_writeback()
1583 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1584 if (writecache_wait_for_writeback(wc)) in writecache_writeback()
1588 if (wc->overwrote_committed) { in writecache_writeback()
1589 writecache_wait_for_ios(wc, WRITE); in writecache_writeback()
1596 while (!list_empty(&wc->lru) && in writecache_writeback()
1597 (wc->writeback_all || in writecache_writeback()
1598 wc->freelist_size + wc->writeback_size <= wc->freelist_low_watermark)) { in writecache_writeback()
1602 likely(!wc->writeback_all) && likely(!dm_suspended(wc->ti))) { in writecache_writeback()
1603 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_writeback()
1607 e = container_of(wc->lru.prev, struct wc_entry, lru); in writecache_writeback()
1609 if (unlikely(!writecache_entry_is_committed(wc, e))) { in writecache_writeback()
1610 writecache_flush(wc); in writecache_writeback()
1615 if (unlikely(read_original_sector(wc, f) == in writecache_writeback()
1616 read_original_sector(wc, e))) { in writecache_writeback()
1624 wc->writeback_size++; in writecache_writeback()
1638 if (read_original_sector(wc, g) == in writecache_writeback()
1639 read_original_sector(wc, f)) { in writecache_writeback()
1643 if (read_original_sector(wc, g) != in writecache_writeback()
1644 read_original_sector(wc, f) + (wc->block_size >> SECTOR_SHIFT)) in writecache_writeback()
1648 if (unlikely(!writecache_entry_is_committed(wc, g))) in writecache_writeback()
1651 if (!WC_MODE_PMEM(wc)) { in writecache_writeback()
1660 wc->writeback_size++; in writecache_writeback()
1675 list_splice_tail(&skipped, &wc->lru); in writecache_writeback()
1681 writecache_wait_for_writeback(wc); in writecache_writeback()
1684 wc_unlock(wc); in writecache_writeback()
1688 if (WC_MODE_PMEM(wc)) in writecache_writeback()
1689 __writecache_writeback_pmem(wc, &wbl); in writecache_writeback()
1691 __writecache_writeback_ssd(wc, &wbl); in writecache_writeback()
1695 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1696 wc_lock(wc); in writecache_writeback()
1697 while (writecache_wait_for_writeback(wc)); in writecache_writeback()
1698 wc_unlock(wc); in writecache_writeback()
1737 static int init_memory(struct dm_writecache *wc) in init_memory() argument
1742 r = calculate_memory_size(wc->memory_map_size, wc->block_size, &wc->n_blocks, NULL); in init_memory()
1746 r = writecache_alloc_entries(wc); in init_memory()
1750 for (b = 0; b < ARRAY_SIZE(sb(wc)->padding); b++) in init_memory()
1751 pmem_assign(sb(wc)->padding[b], cpu_to_le64(0)); in init_memory()
1752 pmem_assign(sb(wc)->version, cpu_to_le32(MEMORY_SUPERBLOCK_VERSION)); in init_memory()
1753 pmem_assign(sb(wc)->block_size, cpu_to_le32(wc->block_size)); in init_memory()
1754 pmem_assign(sb(wc)->n_blocks, cpu_to_le64(wc->n_blocks)); in init_memory()
1755 pmem_assign(sb(wc)->seq_count, cpu_to_le64(0)); in init_memory()
1757 for (b = 0; b < wc->n_blocks; b++) in init_memory()
1758 write_original_sector_seq_count(wc, &wc->entries[b], -1, -1); in init_memory()
1760 writecache_flush_all_metadata(wc); in init_memory()
1761 writecache_commit_flushed(wc); in init_memory()
1762 pmem_assign(sb(wc)->magic, cpu_to_le32(MEMORY_SUPERBLOCK_MAGIC)); in init_memory()
1763 writecache_flush_region(wc, &sb(wc)->magic, sizeof sb(wc)->magic); in init_memory()
1764 writecache_commit_flushed(wc); in init_memory()
1771 struct dm_writecache *wc = ti->private; in writecache_dtr() local
1773 if (!wc) in writecache_dtr()
1776 if (wc->endio_thread) in writecache_dtr()
1777 kthread_stop(wc->endio_thread); in writecache_dtr()
1779 if (wc->flush_thread) in writecache_dtr()
1780 kthread_stop(wc->flush_thread); in writecache_dtr()
1782 bioset_exit(&wc->bio_set); in writecache_dtr()
1784 mempool_exit(&wc->copy_pool); in writecache_dtr()
1786 if (wc->writeback_wq) in writecache_dtr()
1787 destroy_workqueue(wc->writeback_wq); in writecache_dtr()
1789 if (wc->dev) in writecache_dtr()
1790 dm_put_device(ti, wc->dev); in writecache_dtr()
1792 if (wc->ssd_dev) in writecache_dtr()
1793 dm_put_device(ti, wc->ssd_dev); in writecache_dtr()
1795 if (wc->entries) in writecache_dtr()
1796 vfree(wc->entries); in writecache_dtr()
1798 if (wc->memory_map) { in writecache_dtr()
1799 if (WC_MODE_PMEM(wc)) in writecache_dtr()
1800 persistent_memory_release(wc); in writecache_dtr()
1802 vfree(wc->memory_map); in writecache_dtr()
1805 if (wc->dm_kcopyd) in writecache_dtr()
1806 dm_kcopyd_client_destroy(wc->dm_kcopyd); in writecache_dtr()
1808 if (wc->dm_io) in writecache_dtr()
1809 dm_io_client_destroy(wc->dm_io); in writecache_dtr()
1811 if (wc->dirty_bitmap) in writecache_dtr()
1812 vfree(wc->dirty_bitmap); in writecache_dtr()
1814 kfree(wc); in writecache_dtr()
1819 struct dm_writecache *wc; in writecache_ctr() local
1838 wc = kzalloc(sizeof(struct dm_writecache), GFP_KERNEL); in writecache_ctr()
1839 if (!wc) { in writecache_ctr()
1844 ti->private = wc; in writecache_ctr()
1845 wc->ti = ti; in writecache_ctr()
1847 mutex_init(&wc->lock); in writecache_ctr()
1848 writecache_poison_lists(wc); in writecache_ctr()
1849 init_waitqueue_head(&wc->freelist_wait); in writecache_ctr()
1850 timer_setup(&wc->autocommit_timer, writecache_autocommit_timer, 0); in writecache_ctr()
1853 atomic_set(&wc->bio_in_progress[i], 0); in writecache_ctr()
1854 init_waitqueue_head(&wc->bio_in_progress_wait[i]); in writecache_ctr()
1857 wc->dm_io = dm_io_client_create(); in writecache_ctr()
1858 if (IS_ERR(wc->dm_io)) { in writecache_ctr()
1859 r = PTR_ERR(wc->dm_io); in writecache_ctr()
1861 wc->dm_io = NULL; in writecache_ctr()
1865 wc->writeback_wq = alloc_workqueue("writecache-writeabck", WQ_MEM_RECLAIM, 1); in writecache_ctr()
1866 if (!wc->writeback_wq) { in writecache_ctr()
1871 INIT_WORK(&wc->writeback_work, writecache_writeback); in writecache_ctr()
1872 INIT_WORK(&wc->flush_work, writecache_flush_work); in writecache_ctr()
1874 raw_spin_lock_init(&wc->endio_list_lock); in writecache_ctr()
1875 INIT_LIST_HEAD(&wc->endio_list); in writecache_ctr()
1876 wc->endio_thread = kthread_create(writecache_endio_thread, wc, "writecache_endio"); in writecache_ctr()
1877 if (IS_ERR(wc->endio_thread)) { in writecache_ctr()
1878 r = PTR_ERR(wc->endio_thread); in writecache_ctr()
1879 wc->endio_thread = NULL; in writecache_ctr()
1883 wake_up_process(wc->endio_thread); in writecache_ctr()
1893 wc->pmem_mode = false; in writecache_ctr()
1896 wc->pmem_mode = true; in writecache_ctr()
1897 wc->writeback_fua = true; in writecache_ctr()
1912 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
1913 r = bioset_init(&wc->bio_set, BIO_POOL_SIZE, in writecache_ctr()
1921 r = mempool_init_kmalloc_pool(&wc->copy_pool, 1, sizeof(struct copy_struct)); in writecache_ctr()
1934 r = dm_get_device(ti, string, dm_table_get_mode(ti->table), &wc->dev); in writecache_ctr()
1947 r = dm_get_device(ti, string, dm_table_get_mode(ti->table), &wc->ssd_dev); in writecache_ctr()
1952 wc->memory_map_size = i_size_read(wc->ssd_dev->bdev->bd_inode); in writecache_ctr()
1960 if (sscanf(string, "%u%c", &wc->block_size, &dummy) != 1 || in writecache_ctr()
1961 wc->block_size < 512 || wc->block_size > PAGE_SIZE || in writecache_ctr()
1962 (wc->block_size & (wc->block_size - 1))) { in writecache_ctr()
1967 wc->block_size_bits = __ffs(wc->block_size); in writecache_ctr()
1969 wc->max_writeback_jobs = MAX_WRITEBACK_JOBS; in writecache_ctr()
1970 wc->autocommit_blocks = !WC_MODE_PMEM(wc) ? AUTOCOMMIT_BLOCKS_SSD : AUTOCOMMIT_BLOCKS_PMEM; in writecache_ctr()
1971 wc->autocommit_jiffies = msecs_to_jiffies(AUTOCOMMIT_MSEC); in writecache_ctr()
1987 wc->start_sector = start_sector; in writecache_ctr()
1988 if (wc->start_sector != start_sector || in writecache_ctr()
1989 wc->start_sector >= wc->memory_map_size >> SECTOR_SHIFT) in writecache_ctr()
1997 wc->high_wm_percent_set = true; in writecache_ctr()
2004 wc->low_wm_percent_set = true; in writecache_ctr()
2007 if (sscanf(string, "%u%c", &wc->max_writeback_jobs, &dummy) != 1) in writecache_ctr()
2009 wc->max_writeback_jobs_set = true; in writecache_ctr()
2012 if (sscanf(string, "%u%c", &wc->autocommit_blocks, &dummy) != 1) in writecache_ctr()
2014 wc->autocommit_blocks_set = true; in writecache_ctr()
2022 wc->autocommit_jiffies = msecs_to_jiffies(autocommit_msecs); in writecache_ctr()
2023 wc->autocommit_time_set = true; in writecache_ctr()
2025 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2026 wc->writeback_fua = true; in writecache_ctr()
2027 wc->writeback_fua_set = true; in writecache_ctr()
2030 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2031 wc->writeback_fua = false; in writecache_ctr()
2032 wc->writeback_fua_set = true; in writecache_ctr()
2048 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2049 r = persistent_memory_claim(wc); in writecache_ctr()
2060 wc->memory_map_size -= (uint64_t)wc->start_sector << SECTOR_SHIFT; in writecache_ctr()
2062 bio_list_init(&wc->flush_list); in writecache_ctr()
2063 wc->flush_thread = kthread_create(writecache_flush_thread, wc, "dm_writecache_flush"); in writecache_ctr()
2064 if (IS_ERR(wc->flush_thread)) { in writecache_ctr()
2065 r = PTR_ERR(wc->flush_thread); in writecache_ctr()
2066 wc->flush_thread = NULL; in writecache_ctr()
2070 wake_up_process(wc->flush_thread); in writecache_ctr()
2072 r = calculate_memory_size(wc->memory_map_size, wc->block_size, in writecache_ctr()
2079 n_bitmap_bits = (((uint64_t)n_metadata_blocks << wc->block_size_bits) + in writecache_ctr()
2088 wc->memory_map = vmalloc(n_metadata_blocks << wc->block_size_bits); in writecache_ctr()
2089 if (!wc->memory_map) { in writecache_ctr()
2095 wc->dm_kcopyd = dm_kcopyd_client_create(&dm_kcopyd_throttle); in writecache_ctr()
2096 if (IS_ERR(wc->dm_kcopyd)) { in writecache_ctr()
2097 r = PTR_ERR(wc->dm_kcopyd); in writecache_ctr()
2099 wc->dm_kcopyd = NULL; in writecache_ctr()
2103 wc->metadata_sectors = n_metadata_blocks << (wc->block_size_bits - SECTOR_SHIFT); in writecache_ctr()
2104 wc->dirty_bitmap_size = (n_bitmap_bits + BITS_PER_LONG - 1) / in writecache_ctr()
2106 wc->dirty_bitmap = vzalloc(wc->dirty_bitmap_size); in writecache_ctr()
2107 if (!wc->dirty_bitmap) { in writecache_ctr()
2113 region.bdev = wc->ssd_dev->bdev; in writecache_ctr()
2114 region.sector = wc->start_sector; in writecache_ctr()
2115 region.count = wc->metadata_sectors; in writecache_ctr()
2119 req.mem.ptr.vma = (char *)wc->memory_map; in writecache_ctr()
2120 req.client = wc->dm_io; in writecache_ctr()
2130 r = memcpy_mcsafe(&s, sb(wc), sizeof(struct wc_memory_superblock)); in writecache_ctr()
2136 r = init_memory(wc); in writecache_ctr()
2141 r = memcpy_mcsafe(&s, sb(wc), sizeof(struct wc_memory_superblock)); in writecache_ctr()
2160 if (le32_to_cpu(s.block_size) != wc->block_size) { in writecache_ctr()
2166 wc->n_blocks = le64_to_cpu(s.n_blocks); in writecache_ctr()
2168 offset = wc->n_blocks * sizeof(struct wc_memory_entry); in writecache_ctr()
2169 if (offset / sizeof(struct wc_memory_entry) != le64_to_cpu(sb(wc)->n_blocks)) { in writecache_ctr()
2178 offset = (offset + wc->block_size - 1) & ~(size_t)(wc->block_size - 1); in writecache_ctr()
2179 data_size = wc->n_blocks * (size_t)wc->block_size; in writecache_ctr()
2180 if (!offset || (data_size / wc->block_size != wc->n_blocks) || in writecache_ctr()
2183 if (offset + data_size > wc->memory_map_size) { in writecache_ctr()
2189 wc->metadata_sectors = offset >> SECTOR_SHIFT; in writecache_ctr()
2190 wc->block_start = (char *)sb(wc) + offset; in writecache_ctr()
2192 x = (uint64_t)wc->n_blocks * (100 - high_wm_percent); in writecache_ctr()
2195 wc->freelist_high_watermark = x; in writecache_ctr()
2196 x = (uint64_t)wc->n_blocks * (100 - low_wm_percent); in writecache_ctr()
2199 wc->freelist_low_watermark = x; in writecache_ctr()
2201 r = writecache_alloc_entries(wc); in writecache_ctr()
2211 if (WC_MODE_PMEM(wc)) in writecache_ctr()
2212 persistent_memory_flush_cache(wc->memory_map, wc->memory_map_size); in writecache_ctr()
2227 struct dm_writecache *wc = ti->private; in writecache_status() local
2234 DMEMIT("%ld %llu %llu %llu", writecache_has_error(wc), in writecache_status()
2235 (unsigned long long)wc->n_blocks, (unsigned long long)wc->freelist_size, in writecache_status()
2236 (unsigned long long)wc->writeback_size); in writecache_status()
2239 DMEMIT("%c %s %s %u ", WC_MODE_PMEM(wc) ? 'p' : 's', in writecache_status()
2240 wc->dev->name, wc->ssd_dev->name, wc->block_size); in writecache_status()
2242 if (wc->start_sector) in writecache_status()
2244 if (wc->high_wm_percent_set) in writecache_status()
2246 if (wc->low_wm_percent_set) in writecache_status()
2248 if (wc->max_writeback_jobs_set) in writecache_status()
2250 if (wc->autocommit_blocks_set) in writecache_status()
2252 if (wc->autocommit_time_set) in writecache_status()
2254 if (wc->writeback_fua_set) in writecache_status()
2258 if (wc->start_sector) in writecache_status()
2259 DMEMIT(" start_sector %llu", (unsigned long long)wc->start_sector); in writecache_status()
2260 if (wc->high_wm_percent_set) { in writecache_status()
2261 x = (uint64_t)wc->freelist_high_watermark * 100; in writecache_status()
2262 x += wc->n_blocks / 2; in writecache_status()
2263 do_div(x, (size_t)wc->n_blocks); in writecache_status()
2266 if (wc->low_wm_percent_set) { in writecache_status()
2267 x = (uint64_t)wc->freelist_low_watermark * 100; in writecache_status()
2268 x += wc->n_blocks / 2; in writecache_status()
2269 do_div(x, (size_t)wc->n_blocks); in writecache_status()
2272 if (wc->max_writeback_jobs_set) in writecache_status()
2273 DMEMIT(" writeback_jobs %u", wc->max_writeback_jobs); in writecache_status()
2274 if (wc->autocommit_blocks_set) in writecache_status()
2275 DMEMIT(" autocommit_blocks %u", wc->autocommit_blocks); in writecache_status()
2276 if (wc->autocommit_time_set) in writecache_status()
2277 DMEMIT(" autocommit_time %u", jiffies_to_msecs(wc->autocommit_jiffies)); in writecache_status()
2278 if (wc->writeback_fua_set) in writecache_status()
2279 DMEMIT(" %sfua", wc->writeback_fua ? "" : "no"); in writecache_status()