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
199 struct dm_writecache *wc; member
208 static void wc_lock(struct dm_writecache *wc) in wc_lock() argument
210 mutex_lock(&wc->lock); in wc_lock()
213 static void wc_unlock(struct dm_writecache *wc) in wc_unlock() argument
215 mutex_unlock(&wc->lock); in wc_unlock()
219 static int persistent_memory_claim(struct dm_writecache *wc) in persistent_memory_claim() argument
228 wc->memory_vmapped = false; in persistent_memory_claim()
230 if (!wc->ssd_dev->dax_dev) { in persistent_memory_claim()
234 s = wc->memory_map_size; in persistent_memory_claim()
247 da = dax_direct_access(wc->ssd_dev->dax_dev, 0, p, &wc->memory_map, &pfn); in persistent_memory_claim()
249 wc->memory_map = NULL; in persistent_memory_claim()
254 wc->memory_map = NULL; in persistent_memory_claim()
260 wc->memory_map = NULL; in persistent_memory_claim()
269 daa = dax_direct_access(wc->ssd_dev->dax_dev, i, p - i, in persistent_memory_claim()
284 wc->memory_map = vmap(pages, p, VM_MAP, PAGE_KERNEL); in persistent_memory_claim()
285 if (!wc->memory_map) { in persistent_memory_claim()
290 wc->memory_vmapped = true; in persistent_memory_claim()
295 wc->memory_map += (size_t)wc->start_sector << SECTOR_SHIFT; in persistent_memory_claim()
296 wc->memory_map_size -= (size_t)wc->start_sector << SECTOR_SHIFT; in persistent_memory_claim()
307 static int persistent_memory_claim(struct dm_writecache *wc) in persistent_memory_claim() argument
313 static void persistent_memory_release(struct dm_writecache *wc) in persistent_memory_release() argument
315 if (wc->memory_vmapped) in persistent_memory_release()
316 vunmap(wc->memory_map - ((size_t)wc->start_sector << SECTOR_SHIFT)); in persistent_memory_release()
344 static struct wc_memory_superblock *sb(struct dm_writecache *wc) in sb() argument
346 return wc->memory_map; in sb()
349 static struct wc_memory_entry *memory_entry(struct dm_writecache *wc, struct wc_entry *e) in memory_entry() argument
351 return &sb(wc)->entries[e->index]; in memory_entry()
354 static void *memory_data(struct dm_writecache *wc, struct wc_entry *e) in memory_data() argument
356 return (char *)wc->block_start + (e->index << wc->block_size_bits); in memory_data()
359 static sector_t cache_sector(struct dm_writecache *wc, struct wc_entry *e) in cache_sector() argument
361 return wc->start_sector + wc->metadata_sectors + in cache_sector()
362 ((sector_t)e->index << (wc->block_size_bits - SECTOR_SHIFT)); in cache_sector()
365 static uint64_t read_original_sector(struct dm_writecache *wc, struct wc_entry *e) in read_original_sector() argument
370 return le64_to_cpu(memory_entry(wc, e)->original_sector); in read_original_sector()
374 static uint64_t read_seq_count(struct dm_writecache *wc, struct wc_entry *e) in read_seq_count() argument
379 return le64_to_cpu(memory_entry(wc, e)->seq_count); in read_seq_count()
383 static void clear_seq_count(struct dm_writecache *wc, struct wc_entry *e) in clear_seq_count() argument
388 pmem_assign(memory_entry(wc, e)->seq_count, cpu_to_le64(-1)); in clear_seq_count()
391 static void write_original_sector_seq_count(struct dm_writecache *wc, struct wc_entry *e, in write_original_sector_seq_count() argument
401 pmem_assign(*memory_entry(wc, e), me); in write_original_sector_seq_count()
404 #define writecache_error(wc, err, msg, arg...) \ argument
406 if (!cmpxchg(&(wc)->error, 0, err)) \
408 wake_up(&(wc)->freelist_wait); \
411 #define writecache_has_error(wc) (unlikely(READ_ONCE((wc)->error))) argument
413 static void writecache_flush_all_metadata(struct dm_writecache *wc) in writecache_flush_all_metadata() argument
415 if (!WC_MODE_PMEM(wc)) in writecache_flush_all_metadata()
416 memset(wc->dirty_bitmap, -1, wc->dirty_bitmap_size); in writecache_flush_all_metadata()
419 static void writecache_flush_region(struct dm_writecache *wc, void *ptr, size_t size) in writecache_flush_region() argument
421 if (!WC_MODE_PMEM(wc)) in writecache_flush_region()
422 __set_bit(((char *)ptr - (char *)wc->memory_map) / BITMAP_GRANULARITY, in writecache_flush_region()
423 wc->dirty_bitmap); in writecache_flush_region()
426 static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev);
429 struct dm_writecache *wc; member
439 writecache_error(endio->wc, -EIO, "error writing metadata"); in writecache_notify_io()
445 static void ssd_commit_flushed(struct dm_writecache *wc) in ssd_commit_flushed() argument
450 wc, in ssd_commit_flushed()
454 unsigned bitmap_bits = wc->dirty_bitmap_size * 8; in ssd_commit_flushed()
459 i = find_next_bit(wc->dirty_bitmap, bitmap_bits, i); in ssd_commit_flushed()
462 j = find_next_zero_bit(wc->dirty_bitmap, bitmap_bits, i); in ssd_commit_flushed()
464 region.bdev = wc->ssd_dev->bdev; in ssd_commit_flushed()
468 if (unlikely(region.sector >= wc->metadata_sectors)) in ssd_commit_flushed()
470 if (unlikely(region.sector + region.count > wc->metadata_sectors)) in ssd_commit_flushed()
471 region.count = wc->metadata_sectors - region.sector; in ssd_commit_flushed()
473 region.sector += wc->start_sector; in ssd_commit_flushed()
478 req.mem.ptr.vma = (char *)wc->memory_map + (size_t)i * BITMAP_GRANULARITY; in ssd_commit_flushed()
479 req.client = wc->dm_io; in ssd_commit_flushed()
491 writecache_disk_flush(wc, wc->ssd_dev); in ssd_commit_flushed()
493 memset(wc->dirty_bitmap, 0, wc->dirty_bitmap_size); in ssd_commit_flushed()
496 static void writecache_commit_flushed(struct dm_writecache *wc) in writecache_commit_flushed() argument
498 if (WC_MODE_PMEM(wc)) in writecache_commit_flushed()
501 ssd_commit_flushed(wc); in writecache_commit_flushed()
504 static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev) in writecache_disk_flush() argument
517 req.client = wc->dm_io; in writecache_disk_flush()
522 writecache_error(wc, r, "error flushing metadata: %d", r); in writecache_disk_flush()
525 static void writecache_wait_for_ios(struct dm_writecache *wc, int direction) in writecache_wait_for_ios() argument
527 wait_event(wc->bio_in_progress_wait[direction], in writecache_wait_for_ios()
528 !atomic_read(&wc->bio_in_progress[direction])); in writecache_wait_for_ios()
534 static struct wc_entry *writecache_find_entry(struct dm_writecache *wc, in writecache_find_entry() argument
538 struct rb_node *node = wc->tree.rb_node; in writecache_find_entry()
545 if (read_original_sector(wc, e) == block) in writecache_find_entry()
548 node = (read_original_sector(wc, e) >= block ? in writecache_find_entry()
553 if (read_original_sector(wc, e) >= block) { in writecache_find_entry()
574 if (read_original_sector(wc, e2) != block) in writecache_find_entry()
580 static void writecache_insert_entry(struct dm_writecache *wc, struct wc_entry *ins) in writecache_insert_entry() argument
583 struct rb_node **node = &wc->tree.rb_node, *parent = NULL; in writecache_insert_entry()
588 if (read_original_sector(wc, e) > read_original_sector(wc, ins)) in writecache_insert_entry()
594 rb_insert_color(&ins->rb_node, &wc->tree); in writecache_insert_entry()
595 list_add(&ins->lru, &wc->lru); in writecache_insert_entry()
598 static void writecache_unlink(struct dm_writecache *wc, struct wc_entry *e) in writecache_unlink() argument
601 rb_erase(&e->rb_node, &wc->tree); in writecache_unlink()
604 static void writecache_add_to_freelist(struct dm_writecache *wc, struct wc_entry *e) in writecache_add_to_freelist() argument
606 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_add_to_freelist()
607 struct rb_node **node = &wc->freetree.rb_node, *parent = NULL; in writecache_add_to_freelist()
609 wc->current_free = e; in writecache_add_to_freelist()
618 rb_insert_color(&e->rb_node, &wc->freetree); in writecache_add_to_freelist()
620 list_add_tail(&e->lru, &wc->freelist); in writecache_add_to_freelist()
622 wc->freelist_size++; in writecache_add_to_freelist()
625 static struct wc_entry *writecache_pop_from_freelist(struct dm_writecache *wc) in writecache_pop_from_freelist() argument
629 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_pop_from_freelist()
631 if (unlikely(!wc->current_free)) in writecache_pop_from_freelist()
633 e = wc->current_free; in writecache_pop_from_freelist()
635 rb_erase(&e->rb_node, &wc->freetree); in writecache_pop_from_freelist()
637 next = rb_first(&wc->freetree); in writecache_pop_from_freelist()
638 wc->current_free = next ? container_of(next, struct wc_entry, rb_node) : NULL; in writecache_pop_from_freelist()
640 if (unlikely(list_empty(&wc->freelist))) in writecache_pop_from_freelist()
642 e = container_of(wc->freelist.next, struct wc_entry, lru); in writecache_pop_from_freelist()
645 wc->freelist_size--; in writecache_pop_from_freelist()
646 if (unlikely(wc->freelist_size + wc->writeback_size <= wc->freelist_high_watermark)) in writecache_pop_from_freelist()
647 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_pop_from_freelist()
652 static void writecache_free_entry(struct dm_writecache *wc, struct wc_entry *e) in writecache_free_entry() argument
654 writecache_unlink(wc, e); in writecache_free_entry()
655 writecache_add_to_freelist(wc, e); in writecache_free_entry()
656 clear_seq_count(wc, e); in writecache_free_entry()
657 writecache_flush_region(wc, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_free_entry()
658 if (unlikely(waitqueue_active(&wc->freelist_wait))) in writecache_free_entry()
659 wake_up(&wc->freelist_wait); in writecache_free_entry()
662 static void writecache_wait_on_freelist(struct dm_writecache *wc) in writecache_wait_on_freelist() argument
666 prepare_to_wait(&wc->freelist_wait, &wait, TASK_UNINTERRUPTIBLE); in writecache_wait_on_freelist()
667 wc_unlock(wc); in writecache_wait_on_freelist()
669 finish_wait(&wc->freelist_wait, &wait); in writecache_wait_on_freelist()
670 wc_lock(wc); in writecache_wait_on_freelist()
673 static void writecache_poison_lists(struct dm_writecache *wc) in writecache_poison_lists() argument
678 memset(&wc->tree, -1, sizeof wc->tree); in writecache_poison_lists()
679 wc->lru.next = LIST_POISON1; in writecache_poison_lists()
680 wc->lru.prev = LIST_POISON2; in writecache_poison_lists()
681 wc->freelist.next = LIST_POISON1; in writecache_poison_lists()
682 wc->freelist.prev = LIST_POISON2; in writecache_poison_lists()
685 static void writecache_flush_entry(struct dm_writecache *wc, struct wc_entry *e) in writecache_flush_entry() argument
687 writecache_flush_region(wc, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_flush_entry()
688 if (WC_MODE_PMEM(wc)) in writecache_flush_entry()
689 writecache_flush_region(wc, memory_data(wc, e), wc->block_size); in writecache_flush_entry()
692 static bool writecache_entry_is_committed(struct dm_writecache *wc, struct wc_entry *e) in writecache_entry_is_committed() argument
694 return read_seq_count(wc, e) < wc->seq_count; in writecache_entry_is_committed()
697 static void writecache_flush(struct dm_writecache *wc) in writecache_flush() argument
702 wc->uncommitted_blocks = 0; in writecache_flush()
703 del_timer(&wc->autocommit_timer); in writecache_flush()
705 if (list_empty(&wc->lru)) in writecache_flush()
708 e = container_of(wc->lru.next, struct wc_entry, lru); in writecache_flush()
709 if (writecache_entry_is_committed(wc, e)) { in writecache_flush()
710 if (wc->overwrote_committed) { in writecache_flush()
711 writecache_wait_for_ios(wc, WRITE); in writecache_flush()
712 writecache_disk_flush(wc, wc->ssd_dev); in writecache_flush()
713 wc->overwrote_committed = false; in writecache_flush()
718 writecache_flush_entry(wc, e); in writecache_flush()
719 if (unlikely(e->lru.next == &wc->lru)) in writecache_flush()
722 if (writecache_entry_is_committed(wc, e2)) in writecache_flush()
727 writecache_commit_flushed(wc); in writecache_flush()
729 if (!WC_MODE_PMEM(wc)) in writecache_flush()
730 writecache_wait_for_ios(wc, WRITE); in writecache_flush()
732 wc->seq_count++; in writecache_flush()
733 pmem_assign(sb(wc)->seq_count, cpu_to_le64(wc->seq_count)); in writecache_flush()
734 writecache_flush_region(wc, &sb(wc)->seq_count, sizeof sb(wc)->seq_count); in writecache_flush()
735 writecache_commit_flushed(wc); in writecache_flush()
737 wc->overwrote_committed = false; in writecache_flush()
746 if (read_original_sector(wc, e2) == read_original_sector(wc, e) && in writecache_flush()
748 writecache_free_entry(wc, e2); in writecache_flush()
752 if (unlikely(e->lru.prev == &wc->lru)) in writecache_flush()
759 writecache_commit_flushed(wc); in writecache_flush()
764 struct dm_writecache *wc = container_of(work, struct dm_writecache, flush_work); in writecache_flush_work() local
766 wc_lock(wc); in writecache_flush_work()
767 writecache_flush(wc); in writecache_flush_work()
768 wc_unlock(wc); in writecache_flush_work()
773 struct dm_writecache *wc = from_timer(wc, t, autocommit_timer); in writecache_autocommit_timer() local
774 if (!writecache_has_error(wc)) in writecache_autocommit_timer()
775 queue_work(wc->writeback_wq, &wc->flush_work); in writecache_autocommit_timer()
778 static void writecache_schedule_autocommit(struct dm_writecache *wc) in writecache_schedule_autocommit() argument
780 if (!timer_pending(&wc->autocommit_timer)) in writecache_schedule_autocommit()
781 mod_timer(&wc->autocommit_timer, jiffies + wc->autocommit_jiffies); in writecache_schedule_autocommit()
784 static void writecache_discard(struct dm_writecache *wc, sector_t start, sector_t end) in writecache_discard() argument
789 e = writecache_find_entry(wc, start, WFE_RETURN_FOLLOWING | WFE_LOWEST_SEQ); in writecache_discard()
793 while (read_original_sector(wc, e) < end) { in writecache_discard()
798 writecache_wait_for_ios(wc, READ); in writecache_discard()
799 writecache_wait_for_ios(wc, WRITE); in writecache_discard()
802 writecache_free_entry(wc, e); in writecache_discard()
812 writecache_commit_flushed(wc); in writecache_discard()
815 static bool writecache_wait_for_writeback(struct dm_writecache *wc) in writecache_wait_for_writeback() argument
817 if (wc->writeback_size) { in writecache_wait_for_writeback()
818 writecache_wait_on_freelist(wc); in writecache_wait_for_writeback()
826 struct dm_writecache *wc = ti->private; in writecache_suspend() local
829 del_timer_sync(&wc->autocommit_timer); in writecache_suspend()
831 wc_lock(wc); in writecache_suspend()
832 writecache_flush(wc); in writecache_suspend()
833 flush_on_suspend = wc->flush_on_suspend; in writecache_suspend()
835 wc->flush_on_suspend = false; in writecache_suspend()
836 wc->writeback_all++; in writecache_suspend()
837 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_suspend()
839 wc_unlock(wc); in writecache_suspend()
841 flush_workqueue(wc->writeback_wq); in writecache_suspend()
843 wc_lock(wc); in writecache_suspend()
845 wc->writeback_all--; in writecache_suspend()
846 while (writecache_wait_for_writeback(wc)); in writecache_suspend()
848 if (WC_MODE_PMEM(wc)) in writecache_suspend()
849 persistent_memory_flush_cache(wc->memory_map, wc->memory_map_size); in writecache_suspend()
851 writecache_poison_lists(wc); in writecache_suspend()
853 wc_unlock(wc); in writecache_suspend()
856 static int writecache_alloc_entries(struct dm_writecache *wc) in writecache_alloc_entries() argument
860 if (wc->entries) in writecache_alloc_entries()
862 wc->entries = vmalloc(array_size(sizeof(struct wc_entry), wc->n_blocks)); in writecache_alloc_entries()
863 if (!wc->entries) in writecache_alloc_entries()
865 for (b = 0; b < wc->n_blocks; b++) { in writecache_alloc_entries()
866 struct wc_entry *e = &wc->entries[b]; in writecache_alloc_entries()
876 struct dm_writecache *wc = ti->private; in writecache_resume() local
882 wc_lock(wc); in writecache_resume()
884 if (WC_MODE_PMEM(wc)) in writecache_resume()
885 persistent_memory_invalidate_cache(wc->memory_map, wc->memory_map_size); in writecache_resume()
887 wc->tree = RB_ROOT; in writecache_resume()
888 INIT_LIST_HEAD(&wc->lru); in writecache_resume()
889 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_resume()
890 wc->freetree = RB_ROOT; in writecache_resume()
891 wc->current_free = NULL; in writecache_resume()
893 INIT_LIST_HEAD(&wc->freelist); in writecache_resume()
895 wc->freelist_size = 0; in writecache_resume()
897 r = memcpy_mcsafe(&sb_seq_count, &sb(wc)->seq_count, sizeof(uint64_t)); in writecache_resume()
899 writecache_error(wc, r, "hardware memory error when reading superblock: %d", r); in writecache_resume()
902 wc->seq_count = le64_to_cpu(sb_seq_count); in writecache_resume()
905 for (b = 0; b < wc->n_blocks; b++) { in writecache_resume()
906 struct wc_entry *e = &wc->entries[b]; in writecache_resume()
908 if (writecache_has_error(wc)) { in writecache_resume()
913 r = memcpy_mcsafe(&wme, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_resume()
915 writecache_error(wc, r, "hardware memory error when reading metadata entry %lu: %d", in writecache_resume()
925 for (b = 0; b < wc->n_blocks; b++) { in writecache_resume()
926 struct wc_entry *e = &wc->entries[b]; in writecache_resume()
927 if (!writecache_entry_is_committed(wc, e)) { in writecache_resume()
928 if (read_seq_count(wc, e) != -1) { in writecache_resume()
930 clear_seq_count(wc, e); in writecache_resume()
933 writecache_add_to_freelist(wc, e); in writecache_resume()
937 old = writecache_find_entry(wc, read_original_sector(wc, e), 0); in writecache_resume()
939 writecache_insert_entry(wc, e); in writecache_resume()
941 if (read_seq_count(wc, old) == read_seq_count(wc, e)) { in writecache_resume()
942 writecache_error(wc, -EINVAL, in writecache_resume()
944 (unsigned long long)b, (unsigned long long)read_original_sector(wc, e), in writecache_resume()
945 (unsigned long long)read_seq_count(wc, e)); in writecache_resume()
947 if (read_seq_count(wc, old) > read_seq_count(wc, e)) { in writecache_resume()
950 writecache_free_entry(wc, old); in writecache_resume()
951 writecache_insert_entry(wc, e); in writecache_resume()
960 writecache_flush_all_metadata(wc); in writecache_resume()
961 writecache_commit_flushed(wc); in writecache_resume()
964 wc_unlock(wc); in writecache_resume()
967 static int process_flush_mesg(unsigned argc, char **argv, struct dm_writecache *wc) in process_flush_mesg() argument
972 wc_lock(wc); in process_flush_mesg()
973 if (dm_suspended(wc->ti)) { in process_flush_mesg()
974 wc_unlock(wc); in process_flush_mesg()
977 if (writecache_has_error(wc)) { in process_flush_mesg()
978 wc_unlock(wc); in process_flush_mesg()
982 writecache_flush(wc); in process_flush_mesg()
983 wc->writeback_all++; in process_flush_mesg()
984 queue_work(wc->writeback_wq, &wc->writeback_work); in process_flush_mesg()
985 wc_unlock(wc); in process_flush_mesg()
987 flush_workqueue(wc->writeback_wq); in process_flush_mesg()
989 wc_lock(wc); in process_flush_mesg()
990 wc->writeback_all--; in process_flush_mesg()
991 if (writecache_has_error(wc)) { in process_flush_mesg()
992 wc_unlock(wc); in process_flush_mesg()
995 wc_unlock(wc); in process_flush_mesg()
1000 static int process_flush_on_suspend_mesg(unsigned argc, char **argv, struct dm_writecache *wc) in process_flush_on_suspend_mesg() argument
1005 wc_lock(wc); in process_flush_on_suspend_mesg()
1006 wc->flush_on_suspend = true; in process_flush_on_suspend_mesg()
1007 wc_unlock(wc); in process_flush_on_suspend_mesg()
1016 struct dm_writecache *wc = ti->private; in writecache_message() local
1019 r = process_flush_mesg(argc, argv, wc); in writecache_message()
1021 r = process_flush_on_suspend_mesg(argc, argv, wc); in writecache_message()
1028 static void bio_copy_block(struct dm_writecache *wc, struct bio *bio, void *data) in bio_copy_block() argument
1034 unsigned remaining_size = wc->block_size; in bio_copy_block()
1048 writecache_error(wc, r, "hardware memory error when reading data: %d", r); in bio_copy_block()
1066 struct dm_writecache *wc = data; in writecache_flush_thread() local
1071 wc_lock(wc); in writecache_flush_thread()
1072 bio = bio_list_pop(&wc->flush_list); in writecache_flush_thread()
1075 wc_unlock(wc); in writecache_flush_thread()
1087 writecache_discard(wc, bio->bi_iter.bi_sector, in writecache_flush_thread()
1089 wc_unlock(wc); in writecache_flush_thread()
1090 bio_set_dev(bio, wc->dev->bdev); in writecache_flush_thread()
1093 writecache_flush(wc); in writecache_flush_thread()
1094 wc_unlock(wc); in writecache_flush_thread()
1095 if (writecache_has_error(wc)) in writecache_flush_thread()
1104 static void writecache_offload_bio(struct dm_writecache *wc, struct bio *bio) in writecache_offload_bio() argument
1106 if (bio_list_empty(&wc->flush_list)) in writecache_offload_bio()
1107 wake_up_process(wc->flush_thread); in writecache_offload_bio()
1108 bio_list_add(&wc->flush_list, bio); in writecache_offload_bio()
1114 struct dm_writecache *wc = ti->private; in writecache_map() local
1118 wc_lock(wc); in writecache_map()
1121 if (writecache_has_error(wc)) in writecache_map()
1123 if (WC_MODE_PMEM(wc)) { in writecache_map()
1124 writecache_flush(wc); in writecache_map()
1125 if (writecache_has_error(wc)) in writecache_map()
1129 writecache_offload_bio(wc, bio); in writecache_map()
1137 (wc->block_size / 512 - 1)) != 0)) { in writecache_map()
1140 bio->bi_iter.bi_size, wc->block_size); in writecache_map()
1145 if (writecache_has_error(wc)) in writecache_map()
1147 if (WC_MODE_PMEM(wc)) { in writecache_map()
1148 writecache_discard(wc, bio->bi_iter.bi_sector, bio_end_sector(bio)); in writecache_map()
1151 writecache_offload_bio(wc, bio); in writecache_map()
1158 e = writecache_find_entry(wc, bio->bi_iter.bi_sector, WFE_RETURN_FOLLOWING); in writecache_map()
1159 if (e && read_original_sector(wc, e) == bio->bi_iter.bi_sector) { in writecache_map()
1160 if (WC_MODE_PMEM(wc)) { in writecache_map()
1161 bio_copy_block(wc, bio, memory_data(wc, e)); in writecache_map()
1166 dm_accept_partial_bio(bio, wc->block_size >> SECTOR_SHIFT); in writecache_map()
1167 bio_set_dev(bio, wc->ssd_dev->bdev); in writecache_map()
1168 bio->bi_iter.bi_sector = cache_sector(wc, e); in writecache_map()
1169 if (!writecache_entry_is_committed(wc, e)) in writecache_map()
1170 writecache_wait_for_ios(wc, WRITE); in writecache_map()
1176 read_original_sector(wc, e) - bio->bi_iter.bi_sector; in writecache_map()
1185 if (writecache_has_error(wc)) in writecache_map()
1187 e = writecache_find_entry(wc, bio->bi_iter.bi_sector, 0); in writecache_map()
1189 if (!writecache_entry_is_committed(wc, e)) in writecache_map()
1191 if (!WC_MODE_PMEM(wc) && !e->write_in_progress) { in writecache_map()
1192 wc->overwrote_committed = true; in writecache_map()
1196 e = writecache_pop_from_freelist(wc); in writecache_map()
1198 writecache_wait_on_freelist(wc); in writecache_map()
1201 write_original_sector_seq_count(wc, e, bio->bi_iter.bi_sector, wc->seq_count); in writecache_map()
1202 writecache_insert_entry(wc, e); in writecache_map()
1203 wc->uncommitted_blocks++; in writecache_map()
1205 if (WC_MODE_PMEM(wc)) { in writecache_map()
1206 bio_copy_block(wc, bio, memory_data(wc, e)); in writecache_map()
1208 dm_accept_partial_bio(bio, wc->block_size >> SECTOR_SHIFT); in writecache_map()
1209 bio_set_dev(bio, wc->ssd_dev->bdev); in writecache_map()
1210 bio->bi_iter.bi_sector = cache_sector(wc, e); in writecache_map()
1211 if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks)) { in writecache_map()
1212 wc->uncommitted_blocks = 0; in writecache_map()
1213 queue_work(wc->writeback_wq, &wc->flush_work); in writecache_map()
1215 writecache_schedule_autocommit(wc); in writecache_map()
1221 if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks)) in writecache_map()
1222 writecache_flush(wc); in writecache_map()
1224 writecache_schedule_autocommit(wc); in writecache_map()
1229 bio_set_dev(bio, wc->dev->bdev); in writecache_map()
1230 wc_unlock(wc); in writecache_map()
1236 atomic_inc(&wc->bio_in_progress[bio_data_dir(bio)]); in writecache_map()
1237 wc_unlock(wc); in writecache_map()
1241 wc_unlock(wc); in writecache_map()
1246 wc_unlock(wc); in writecache_map()
1250 wc_unlock(wc); in writecache_map()
1257 struct dm_writecache *wc = ti->private; in writecache_end_io() local
1261 if (atomic_dec_and_test(&wc->bio_in_progress[dir])) in writecache_end_io()
1262 if (unlikely(waitqueue_active(&wc->bio_in_progress_wait[dir]))) in writecache_end_io()
1263 wake_up(&wc->bio_in_progress_wait[dir]); in writecache_end_io()
1271 struct dm_writecache *wc = ti->private; in writecache_iterate_devices() local
1273 return fn(ti, wc->dev, 0, ti->len, data); in writecache_iterate_devices()
1278 struct dm_writecache *wc = ti->private; in writecache_io_hints() local
1280 if (limits->logical_block_size < wc->block_size) in writecache_io_hints()
1281 limits->logical_block_size = wc->block_size; in writecache_io_hints()
1283 if (limits->physical_block_size < wc->block_size) in writecache_io_hints()
1284 limits->physical_block_size = wc->block_size; in writecache_io_hints()
1286 if (limits->io_min < wc->block_size) in writecache_io_hints()
1287 limits->io_min = wc->block_size; in writecache_io_hints()
1294 struct dm_writecache *wc = wb->wc; in writecache_writeback_endio() local
1297 raw_spin_lock_irqsave(&wc->endio_list_lock, flags); in writecache_writeback_endio()
1298 if (unlikely(list_empty(&wc->endio_list))) in writecache_writeback_endio()
1299 wake_up_process(wc->endio_thread); in writecache_writeback_endio()
1300 list_add_tail(&wb->endio_entry, &wc->endio_list); in writecache_writeback_endio()
1301 raw_spin_unlock_irqrestore(&wc->endio_list_lock, flags); in writecache_writeback_endio()
1307 struct dm_writecache *wc = c->wc; in writecache_copy_endio() local
1311 raw_spin_lock_irq(&wc->endio_list_lock); in writecache_copy_endio()
1312 if (unlikely(list_empty(&wc->endio_list))) in writecache_copy_endio()
1313 wake_up_process(wc->endio_thread); in writecache_copy_endio()
1314 list_add_tail(&c->endio_entry, &wc->endio_list); in writecache_copy_endio()
1315 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_copy_endio()
1318 static void __writecache_endio_pmem(struct dm_writecache *wc, struct list_head *list) in __writecache_endio_pmem() argument
1330 writecache_error(wc, blk_status_to_errno(wb->bio.bi_status), in __writecache_endio_pmem()
1338 if (!writecache_has_error(wc)) in __writecache_endio_pmem()
1339 writecache_free_entry(wc, e); in __writecache_endio_pmem()
1340 BUG_ON(!wc->writeback_size); in __writecache_endio_pmem()
1341 wc->writeback_size--; in __writecache_endio_pmem()
1344 writecache_commit_flushed(wc); in __writecache_endio_pmem()
1345 wc_unlock(wc); in __writecache_endio_pmem()
1346 wc_lock(wc); in __writecache_endio_pmem()
1357 static void __writecache_endio_ssd(struct dm_writecache *wc, struct list_head *list) in __writecache_endio_ssd() argument
1367 writecache_error(wc, c->error, "copy error"); in __writecache_endio_ssd()
1374 if (!writecache_has_error(wc)) in __writecache_endio_ssd()
1375 writecache_free_entry(wc, e); in __writecache_endio_ssd()
1377 BUG_ON(!wc->writeback_size); in __writecache_endio_ssd()
1378 wc->writeback_size--; in __writecache_endio_ssd()
1381 mempool_free(c, &wc->copy_pool); in __writecache_endio_ssd()
1387 struct dm_writecache *wc = data; in writecache_endio_thread() local
1392 raw_spin_lock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1393 if (!list_empty(&wc->endio_list)) in writecache_endio_thread()
1396 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1408 list = wc->endio_list; in writecache_endio_thread()
1410 INIT_LIST_HEAD(&wc->endio_list); in writecache_endio_thread()
1411 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1413 if (!WC_MODE_FUA(wc)) in writecache_endio_thread()
1414 writecache_disk_flush(wc, wc->dev); in writecache_endio_thread()
1416 wc_lock(wc); in writecache_endio_thread()
1418 if (WC_MODE_PMEM(wc)) { in writecache_endio_thread()
1419 __writecache_endio_pmem(wc, &list); in writecache_endio_thread()
1421 __writecache_endio_ssd(wc, &list); in writecache_endio_thread()
1422 writecache_wait_for_ios(wc, READ); in writecache_endio_thread()
1425 writecache_commit_flushed(wc); in writecache_endio_thread()
1427 wc_unlock(wc); in writecache_endio_thread()
1435 struct dm_writecache *wc = wb->wc; in wc_add_block() local
1436 unsigned block_size = wc->block_size; in wc_add_block()
1437 void *address = memory_data(wc, e); in wc_add_block()
1449 static void __writeback_throttle(struct dm_writecache *wc, struct writeback_list *wbl) in __writeback_throttle() argument
1451 if (unlikely(wc->max_writeback_jobs)) { in __writeback_throttle()
1452 if (READ_ONCE(wc->writeback_size) - wbl->size >= wc->max_writeback_jobs) { in __writeback_throttle()
1453 wc_lock(wc); in __writeback_throttle()
1454 while (wc->writeback_size - wbl->size >= wc->max_writeback_jobs) in __writeback_throttle()
1455 writecache_wait_on_freelist(wc); in __writeback_throttle()
1456 wc_unlock(wc); in __writeback_throttle()
1462 static void __writecache_writeback_pmem(struct dm_writecache *wc, struct writeback_list *wbl) in __writecache_writeback_pmem() argument
1476 bio = bio_alloc_bioset(GFP_NOIO, max_pages, &wc->bio_set); in __writecache_writeback_pmem()
1478 wb->wc = wc; in __writecache_writeback_pmem()
1480 bio_set_dev(bio, wc->dev->bdev); in __writecache_writeback_pmem()
1481 bio->bi_iter.bi_sector = read_original_sector(wc, e); in __writecache_writeback_pmem()
1497 if (read_original_sector(wc, f) != in __writecache_writeback_pmem()
1498 read_original_sector(wc, e) + (wc->block_size >> SECTOR_SHIFT)) in __writecache_writeback_pmem()
1507 bio_set_op_attrs(bio, REQ_OP_WRITE, WC_MODE_FUA(wc) * REQ_FUA); in __writecache_writeback_pmem()
1508 if (writecache_has_error(wc)) { in __writecache_writeback_pmem()
1515 __writeback_throttle(wc, wbl); in __writecache_writeback_pmem()
1519 static void __writecache_writeback_ssd(struct dm_writecache *wc, struct writeback_list *wbl) in __writecache_writeback_ssd() argument
1532 n_sectors = e->wc_list_contiguous << (wc->block_size_bits - SECTOR_SHIFT); in __writecache_writeback_ssd()
1534 from.bdev = wc->ssd_dev->bdev; in __writecache_writeback_ssd()
1535 from.sector = cache_sector(wc, e); in __writecache_writeback_ssd()
1537 to.bdev = wc->dev->bdev; in __writecache_writeback_ssd()
1538 to.sector = read_original_sector(wc, e); in __writecache_writeback_ssd()
1541 c = mempool_alloc(&wc->copy_pool, GFP_NOIO); in __writecache_writeback_ssd()
1542 c->wc = wc; in __writecache_writeback_ssd()
1546 while ((n_sectors -= wc->block_size >> SECTOR_SHIFT)) { in __writecache_writeback_ssd()
1554 dm_kcopyd_copy(wc->dm_kcopyd, &from, 1, &to, 0, writecache_copy_endio, c); in __writecache_writeback_ssd()
1556 __writeback_throttle(wc, wbl); in __writecache_writeback_ssd()
1562 struct dm_writecache *wc = container_of(work, struct dm_writecache, writeback_work); in writecache_writeback() local
1570 wc_lock(wc); in writecache_writeback()
1572 if (writecache_has_error(wc)) { in writecache_writeback()
1573 wc_unlock(wc); in writecache_writeback()
1577 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1578 if (writecache_wait_for_writeback(wc)) in writecache_writeback()
1582 if (wc->overwrote_committed) { in writecache_writeback()
1583 writecache_wait_for_ios(wc, WRITE); in writecache_writeback()
1590 while (!list_empty(&wc->lru) && in writecache_writeback()
1591 (wc->writeback_all || in writecache_writeback()
1592 wc->freelist_size + wc->writeback_size <= wc->freelist_low_watermark)) { in writecache_writeback()
1596 likely(!wc->writeback_all) && likely(!dm_suspended(wc->ti))) { in writecache_writeback()
1597 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_writeback()
1601 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1603 writecache_flush(wc); in writecache_writeback()
1604 e = container_of(rb_first(&wc->tree), struct wc_entry, rb_node); in writecache_writeback()
1608 e = container_of(wc->lru.prev, struct wc_entry, lru); in writecache_writeback()
1610 if (unlikely(!writecache_entry_is_committed(wc, e))) { in writecache_writeback()
1611 writecache_flush(wc); in writecache_writeback()
1616 if (unlikely(read_original_sector(wc, f) == in writecache_writeback()
1617 read_original_sector(wc, e))) { in writecache_writeback()
1625 wc->writeback_size++; in writecache_writeback()
1639 if (unlikely(read_original_sector(wc, g) == in writecache_writeback()
1640 read_original_sector(wc, f))) { in writecache_writeback()
1644 if (read_original_sector(wc, g) != in writecache_writeback()
1645 read_original_sector(wc, f) + (wc->block_size >> SECTOR_SHIFT)) in writecache_writeback()
1649 if (unlikely(!writecache_entry_is_committed(wc, g))) in writecache_writeback()
1652 if (!WC_MODE_PMEM(wc)) { in writecache_writeback()
1661 wc->writeback_size++; in writecache_writeback()
1670 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1682 list_splice_tail(&skipped, &wc->lru); in writecache_writeback()
1688 writecache_wait_for_writeback(wc); in writecache_writeback()
1691 wc_unlock(wc); in writecache_writeback()
1695 if (WC_MODE_PMEM(wc)) in writecache_writeback()
1696 __writecache_writeback_pmem(wc, &wbl); in writecache_writeback()
1698 __writecache_writeback_ssd(wc, &wbl); in writecache_writeback()
1702 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1703 wc_lock(wc); in writecache_writeback()
1704 while (writecache_wait_for_writeback(wc)); in writecache_writeback()
1705 wc_unlock(wc); in writecache_writeback()
1744 static int init_memory(struct dm_writecache *wc) in init_memory() argument
1749 r = calculate_memory_size(wc->memory_map_size, wc->block_size, &wc->n_blocks, NULL); in init_memory()
1753 r = writecache_alloc_entries(wc); in init_memory()
1757 for (b = 0; b < ARRAY_SIZE(sb(wc)->padding); b++) in init_memory()
1758 pmem_assign(sb(wc)->padding[b], cpu_to_le64(0)); in init_memory()
1759 pmem_assign(sb(wc)->version, cpu_to_le32(MEMORY_SUPERBLOCK_VERSION)); in init_memory()
1760 pmem_assign(sb(wc)->block_size, cpu_to_le32(wc->block_size)); in init_memory()
1761 pmem_assign(sb(wc)->n_blocks, cpu_to_le64(wc->n_blocks)); in init_memory()
1762 pmem_assign(sb(wc)->seq_count, cpu_to_le64(0)); in init_memory()
1764 for (b = 0; b < wc->n_blocks; b++) in init_memory()
1765 write_original_sector_seq_count(wc, &wc->entries[b], -1, -1); in init_memory()
1767 writecache_flush_all_metadata(wc); in init_memory()
1768 writecache_commit_flushed(wc); in init_memory()
1769 pmem_assign(sb(wc)->magic, cpu_to_le32(MEMORY_SUPERBLOCK_MAGIC)); in init_memory()
1770 writecache_flush_region(wc, &sb(wc)->magic, sizeof sb(wc)->magic); in init_memory()
1771 writecache_commit_flushed(wc); in init_memory()
1778 struct dm_writecache *wc = ti->private; in writecache_dtr() local
1780 if (!wc) in writecache_dtr()
1783 if (wc->endio_thread) in writecache_dtr()
1784 kthread_stop(wc->endio_thread); in writecache_dtr()
1786 if (wc->flush_thread) in writecache_dtr()
1787 kthread_stop(wc->flush_thread); in writecache_dtr()
1789 bioset_exit(&wc->bio_set); in writecache_dtr()
1791 mempool_exit(&wc->copy_pool); in writecache_dtr()
1793 if (wc->writeback_wq) in writecache_dtr()
1794 destroy_workqueue(wc->writeback_wq); in writecache_dtr()
1796 if (wc->dev) in writecache_dtr()
1797 dm_put_device(ti, wc->dev); in writecache_dtr()
1799 if (wc->ssd_dev) in writecache_dtr()
1800 dm_put_device(ti, wc->ssd_dev); in writecache_dtr()
1802 if (wc->entries) in writecache_dtr()
1803 vfree(wc->entries); in writecache_dtr()
1805 if (wc->memory_map) { in writecache_dtr()
1806 if (WC_MODE_PMEM(wc)) in writecache_dtr()
1807 persistent_memory_release(wc); in writecache_dtr()
1809 vfree(wc->memory_map); in writecache_dtr()
1812 if (wc->dm_kcopyd) in writecache_dtr()
1813 dm_kcopyd_client_destroy(wc->dm_kcopyd); in writecache_dtr()
1815 if (wc->dm_io) in writecache_dtr()
1816 dm_io_client_destroy(wc->dm_io); in writecache_dtr()
1818 if (wc->dirty_bitmap) in writecache_dtr()
1819 vfree(wc->dirty_bitmap); in writecache_dtr()
1821 kfree(wc); in writecache_dtr()
1826 struct dm_writecache *wc; in writecache_ctr() local
1845 wc = kzalloc(sizeof(struct dm_writecache), GFP_KERNEL); in writecache_ctr()
1846 if (!wc) { in writecache_ctr()
1851 ti->private = wc; in writecache_ctr()
1852 wc->ti = ti; in writecache_ctr()
1854 mutex_init(&wc->lock); in writecache_ctr()
1855 writecache_poison_lists(wc); in writecache_ctr()
1856 init_waitqueue_head(&wc->freelist_wait); in writecache_ctr()
1857 timer_setup(&wc->autocommit_timer, writecache_autocommit_timer, 0); in writecache_ctr()
1860 atomic_set(&wc->bio_in_progress[i], 0); in writecache_ctr()
1861 init_waitqueue_head(&wc->bio_in_progress_wait[i]); in writecache_ctr()
1864 wc->dm_io = dm_io_client_create(); in writecache_ctr()
1865 if (IS_ERR(wc->dm_io)) { in writecache_ctr()
1866 r = PTR_ERR(wc->dm_io); in writecache_ctr()
1868 wc->dm_io = NULL; in writecache_ctr()
1872 wc->writeback_wq = alloc_workqueue("writecache-writeback", WQ_MEM_RECLAIM, 1); in writecache_ctr()
1873 if (!wc->writeback_wq) { in writecache_ctr()
1878 INIT_WORK(&wc->writeback_work, writecache_writeback); in writecache_ctr()
1879 INIT_WORK(&wc->flush_work, writecache_flush_work); in writecache_ctr()
1881 raw_spin_lock_init(&wc->endio_list_lock); in writecache_ctr()
1882 INIT_LIST_HEAD(&wc->endio_list); in writecache_ctr()
1883 wc->endio_thread = kthread_create(writecache_endio_thread, wc, "writecache_endio"); in writecache_ctr()
1884 if (IS_ERR(wc->endio_thread)) { in writecache_ctr()
1885 r = PTR_ERR(wc->endio_thread); in writecache_ctr()
1886 wc->endio_thread = NULL; in writecache_ctr()
1890 wake_up_process(wc->endio_thread); in writecache_ctr()
1900 wc->pmem_mode = false; in writecache_ctr()
1903 wc->pmem_mode = true; in writecache_ctr()
1904 wc->writeback_fua = true; in writecache_ctr()
1919 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
1920 r = bioset_init(&wc->bio_set, BIO_POOL_SIZE, in writecache_ctr()
1928 r = mempool_init_kmalloc_pool(&wc->copy_pool, 1, sizeof(struct copy_struct)); in writecache_ctr()
1941 r = dm_get_device(ti, string, dm_table_get_mode(ti->table), &wc->dev); in writecache_ctr()
1954 r = dm_get_device(ti, string, dm_table_get_mode(ti->table), &wc->ssd_dev); in writecache_ctr()
1959 wc->memory_map_size = i_size_read(wc->ssd_dev->bdev->bd_inode); in writecache_ctr()
1967 if (sscanf(string, "%u%c", &wc->block_size, &dummy) != 1 || in writecache_ctr()
1968 wc->block_size < 512 || wc->block_size > PAGE_SIZE || in writecache_ctr()
1969 (wc->block_size & (wc->block_size - 1))) { in writecache_ctr()
1974 wc->block_size_bits = __ffs(wc->block_size); in writecache_ctr()
1976 wc->max_writeback_jobs = MAX_WRITEBACK_JOBS; in writecache_ctr()
1977 wc->autocommit_blocks = !WC_MODE_PMEM(wc) ? AUTOCOMMIT_BLOCKS_SSD : AUTOCOMMIT_BLOCKS_PMEM; in writecache_ctr()
1978 wc->autocommit_jiffies = msecs_to_jiffies(AUTOCOMMIT_MSEC); in writecache_ctr()
1994 wc->start_sector = start_sector; in writecache_ctr()
1995 if (wc->start_sector != start_sector || in writecache_ctr()
1996 wc->start_sector >= wc->memory_map_size >> SECTOR_SHIFT) in writecache_ctr()
2004 wc->high_wm_percent_set = true; in writecache_ctr()
2011 wc->low_wm_percent_set = true; in writecache_ctr()
2014 if (sscanf(string, "%u%c", &wc->max_writeback_jobs, &dummy) != 1) in writecache_ctr()
2016 wc->max_writeback_jobs_set = true; in writecache_ctr()
2019 if (sscanf(string, "%u%c", &wc->autocommit_blocks, &dummy) != 1) in writecache_ctr()
2021 wc->autocommit_blocks_set = true; in writecache_ctr()
2029 wc->autocommit_jiffies = msecs_to_jiffies(autocommit_msecs); in writecache_ctr()
2030 wc->autocommit_time_set = true; in writecache_ctr()
2032 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2033 wc->writeback_fua = true; in writecache_ctr()
2034 wc->writeback_fua_set = true; in writecache_ctr()
2037 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2038 wc->writeback_fua = false; in writecache_ctr()
2039 wc->writeback_fua_set = true; in writecache_ctr()
2055 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2056 r = persistent_memory_claim(wc); in writecache_ctr()
2067 wc->memory_map_size -= (uint64_t)wc->start_sector << SECTOR_SHIFT; in writecache_ctr()
2069 bio_list_init(&wc->flush_list); in writecache_ctr()
2070 wc->flush_thread = kthread_create(writecache_flush_thread, wc, "dm_writecache_flush"); in writecache_ctr()
2071 if (IS_ERR(wc->flush_thread)) { in writecache_ctr()
2072 r = PTR_ERR(wc->flush_thread); in writecache_ctr()
2073 wc->flush_thread = NULL; in writecache_ctr()
2077 wake_up_process(wc->flush_thread); in writecache_ctr()
2079 r = calculate_memory_size(wc->memory_map_size, wc->block_size, in writecache_ctr()
2086 n_bitmap_bits = (((uint64_t)n_metadata_blocks << wc->block_size_bits) + in writecache_ctr()
2095 wc->memory_map = vmalloc(n_metadata_blocks << wc->block_size_bits); in writecache_ctr()
2096 if (!wc->memory_map) { in writecache_ctr()
2102 wc->dm_kcopyd = dm_kcopyd_client_create(&dm_kcopyd_throttle); in writecache_ctr()
2103 if (IS_ERR(wc->dm_kcopyd)) { in writecache_ctr()
2104 r = PTR_ERR(wc->dm_kcopyd); in writecache_ctr()
2106 wc->dm_kcopyd = NULL; in writecache_ctr()
2110 wc->metadata_sectors = n_metadata_blocks << (wc->block_size_bits - SECTOR_SHIFT); in writecache_ctr()
2111 wc->dirty_bitmap_size = (n_bitmap_bits + BITS_PER_LONG - 1) / in writecache_ctr()
2113 wc->dirty_bitmap = vzalloc(wc->dirty_bitmap_size); in writecache_ctr()
2114 if (!wc->dirty_bitmap) { in writecache_ctr()
2120 region.bdev = wc->ssd_dev->bdev; in writecache_ctr()
2121 region.sector = wc->start_sector; in writecache_ctr()
2122 region.count = wc->metadata_sectors; in writecache_ctr()
2126 req.mem.ptr.vma = (char *)wc->memory_map; in writecache_ctr()
2127 req.client = wc->dm_io; in writecache_ctr()
2137 r = memcpy_mcsafe(&s, sb(wc), sizeof(struct wc_memory_superblock)); in writecache_ctr()
2143 r = init_memory(wc); in writecache_ctr()
2148 r = memcpy_mcsafe(&s, sb(wc), sizeof(struct wc_memory_superblock)); in writecache_ctr()
2167 if (le32_to_cpu(s.block_size) != wc->block_size) { in writecache_ctr()
2173 wc->n_blocks = le64_to_cpu(s.n_blocks); in writecache_ctr()
2175 offset = wc->n_blocks * sizeof(struct wc_memory_entry); in writecache_ctr()
2176 if (offset / sizeof(struct wc_memory_entry) != le64_to_cpu(sb(wc)->n_blocks)) { in writecache_ctr()
2185 offset = (offset + wc->block_size - 1) & ~(size_t)(wc->block_size - 1); in writecache_ctr()
2186 data_size = wc->n_blocks * (size_t)wc->block_size; in writecache_ctr()
2187 if (!offset || (data_size / wc->block_size != wc->n_blocks) || in writecache_ctr()
2190 if (offset + data_size > wc->memory_map_size) { in writecache_ctr()
2196 wc->metadata_sectors = offset >> SECTOR_SHIFT; in writecache_ctr()
2197 wc->block_start = (char *)sb(wc) + offset; in writecache_ctr()
2199 x = (uint64_t)wc->n_blocks * (100 - high_wm_percent); in writecache_ctr()
2202 wc->freelist_high_watermark = x; in writecache_ctr()
2203 x = (uint64_t)wc->n_blocks * (100 - low_wm_percent); in writecache_ctr()
2206 wc->freelist_low_watermark = x; in writecache_ctr()
2208 r = writecache_alloc_entries(wc); in writecache_ctr()
2218 if (WC_MODE_PMEM(wc)) in writecache_ctr()
2219 persistent_memory_flush_cache(wc->memory_map, wc->memory_map_size); in writecache_ctr()
2234 struct dm_writecache *wc = ti->private; in writecache_status() local
2241 DMEMIT("%ld %llu %llu %llu", writecache_has_error(wc), in writecache_status()
2242 (unsigned long long)wc->n_blocks, (unsigned long long)wc->freelist_size, in writecache_status()
2243 (unsigned long long)wc->writeback_size); in writecache_status()
2246 DMEMIT("%c %s %s %u ", WC_MODE_PMEM(wc) ? 'p' : 's', in writecache_status()
2247 wc->dev->name, wc->ssd_dev->name, wc->block_size); in writecache_status()
2249 if (wc->start_sector) in writecache_status()
2251 if (wc->high_wm_percent_set) in writecache_status()
2253 if (wc->low_wm_percent_set) in writecache_status()
2255 if (wc->max_writeback_jobs_set) in writecache_status()
2257 if (wc->autocommit_blocks_set) in writecache_status()
2259 if (wc->autocommit_time_set) in writecache_status()
2261 if (wc->writeback_fua_set) in writecache_status()
2265 if (wc->start_sector) in writecache_status()
2266 DMEMIT(" start_sector %llu", (unsigned long long)wc->start_sector); in writecache_status()
2267 if (wc->high_wm_percent_set) { in writecache_status()
2268 x = (uint64_t)wc->freelist_high_watermark * 100; in writecache_status()
2269 x += wc->n_blocks / 2; in writecache_status()
2270 do_div(x, (size_t)wc->n_blocks); in writecache_status()
2273 if (wc->low_wm_percent_set) { in writecache_status()
2274 x = (uint64_t)wc->freelist_low_watermark * 100; in writecache_status()
2275 x += wc->n_blocks / 2; in writecache_status()
2276 do_div(x, (size_t)wc->n_blocks); in writecache_status()
2279 if (wc->max_writeback_jobs_set) in writecache_status()
2280 DMEMIT(" writeback_jobs %u", wc->max_writeback_jobs); in writecache_status()
2281 if (wc->autocommit_blocks_set) in writecache_status()
2282 DMEMIT(" autocommit_blocks %u", wc->autocommit_blocks); in writecache_status()
2283 if (wc->autocommit_time_set) in writecache_status()
2284 DMEMIT(" autocommit_time %u", jiffies_to_msecs(wc->autocommit_jiffies)); in writecache_status()
2285 if (wc->writeback_fua_set) in writecache_status()
2286 DMEMIT(" %sfua", wc->writeback_fua ? "" : "no"); in writecache_status()