Lines Matching full:wc
101 #define WC_MODE_PMEM(wc) ((wc)->pmem_mode) argument
102 #define WC_MODE_FUA(wc) ((wc)->writeback_fua) argument
104 #define WC_MODE_PMEM(wc) false argument
105 #define WC_MODE_FUA(wc) false argument
107 #define WC_MODE_SORT_FREELIST(wc) (!WC_MODE_PMEM(wc)) argument
197 struct dm_writecache *wc; member
206 struct dm_writecache *wc; member
215 static void wc_lock(struct dm_writecache *wc) in wc_lock() argument
217 mutex_lock(&wc->lock); in wc_lock()
220 static void wc_unlock(struct dm_writecache *wc) in wc_unlock() argument
222 mutex_unlock(&wc->lock); in wc_unlock()
226 static int persistent_memory_claim(struct dm_writecache *wc) in persistent_memory_claim() argument
236 wc->memory_vmapped = false; in persistent_memory_claim()
238 s = wc->memory_map_size; in persistent_memory_claim()
249 offset = get_start_sect(wc->ssd_dev->bdev); in persistent_memory_claim()
258 da = dax_direct_access(wc->ssd_dev->dax_dev, offset, p, &wc->memory_map, &pfn); in persistent_memory_claim()
260 wc->memory_map = NULL; in persistent_memory_claim()
265 wc->memory_map = NULL; in persistent_memory_claim()
271 wc->memory_map = NULL; in persistent_memory_claim()
280 daa = dax_direct_access(wc->ssd_dev->dax_dev, offset + i, p - i, in persistent_memory_claim()
297 wc->memory_map = vmap(pages, p, VM_MAP, PAGE_KERNEL); in persistent_memory_claim()
298 if (!wc->memory_map) { in persistent_memory_claim()
303 wc->memory_vmapped = true; in persistent_memory_claim()
308 wc->memory_map += (size_t)wc->start_sector << SECTOR_SHIFT; in persistent_memory_claim()
309 wc->memory_map_size -= (size_t)wc->start_sector << SECTOR_SHIFT; in persistent_memory_claim()
320 static int persistent_memory_claim(struct dm_writecache *wc) in persistent_memory_claim() argument
326 static void persistent_memory_release(struct dm_writecache *wc) in persistent_memory_release() argument
328 if (wc->memory_vmapped) in persistent_memory_release()
329 vunmap(wc->memory_map - ((size_t)wc->start_sector << SECTOR_SHIFT)); in persistent_memory_release()
357 static struct wc_memory_superblock *sb(struct dm_writecache *wc) in sb() argument
359 return wc->memory_map; in sb()
362 static struct wc_memory_entry *memory_entry(struct dm_writecache *wc, struct wc_entry *e) in memory_entry() argument
364 return &sb(wc)->entries[e->index]; in memory_entry()
367 static void *memory_data(struct dm_writecache *wc, struct wc_entry *e) in memory_data() argument
369 return (char *)wc->block_start + (e->index << wc->block_size_bits); in memory_data()
372 static sector_t cache_sector(struct dm_writecache *wc, struct wc_entry *e) in cache_sector() argument
374 return wc->start_sector + wc->metadata_sectors + in cache_sector()
375 ((sector_t)e->index << (wc->block_size_bits - SECTOR_SHIFT)); in cache_sector()
378 static uint64_t read_original_sector(struct dm_writecache *wc, struct wc_entry *e) in read_original_sector() argument
383 return le64_to_cpu(memory_entry(wc, e)->original_sector); in read_original_sector()
387 static uint64_t read_seq_count(struct dm_writecache *wc, struct wc_entry *e) in read_seq_count() argument
392 return le64_to_cpu(memory_entry(wc, e)->seq_count); in read_seq_count()
396 static void clear_seq_count(struct dm_writecache *wc, struct wc_entry *e) in clear_seq_count() argument
401 pmem_assign(memory_entry(wc, e)->seq_count, cpu_to_le64(-1)); in clear_seq_count()
404 static void write_original_sector_seq_count(struct dm_writecache *wc, struct wc_entry *e, in write_original_sector_seq_count() argument
414 pmem_assign(*memory_entry(wc, e), me); in write_original_sector_seq_count()
417 #define writecache_error(wc, err, msg, arg...) \ argument
419 if (!cmpxchg(&(wc)->error, 0, err)) \
421 wake_up(&(wc)->freelist_wait); \
424 #define writecache_has_error(wc) (unlikely(READ_ONCE((wc)->error))) argument
426 static void writecache_flush_all_metadata(struct dm_writecache *wc) in writecache_flush_all_metadata() argument
428 if (!WC_MODE_PMEM(wc)) in writecache_flush_all_metadata()
429 memset(wc->dirty_bitmap, -1, wc->dirty_bitmap_size); in writecache_flush_all_metadata()
432 static void writecache_flush_region(struct dm_writecache *wc, void *ptr, size_t size) in writecache_flush_region() argument
434 if (!WC_MODE_PMEM(wc)) in writecache_flush_region()
435 __set_bit(((char *)ptr - (char *)wc->memory_map) / BITMAP_GRANULARITY, in writecache_flush_region()
436 wc->dirty_bitmap); in writecache_flush_region()
439 static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev);
442 struct dm_writecache *wc; member
452 writecache_error(endio->wc, -EIO, "error writing metadata"); in writecache_notify_io()
458 static void writecache_wait_for_ios(struct dm_writecache *wc, int direction) in writecache_wait_for_ios() argument
460 wait_event(wc->bio_in_progress_wait[direction], in writecache_wait_for_ios()
461 !atomic_read(&wc->bio_in_progress[direction])); in writecache_wait_for_ios()
464 static void ssd_commit_flushed(struct dm_writecache *wc, bool wait_for_ios) in ssd_commit_flushed() argument
469 wc, in ssd_commit_flushed()
473 unsigned bitmap_bits = wc->dirty_bitmap_size * 8; in ssd_commit_flushed()
478 i = find_next_bit(wc->dirty_bitmap, bitmap_bits, i); in ssd_commit_flushed()
481 j = find_next_zero_bit(wc->dirty_bitmap, bitmap_bits, i); in ssd_commit_flushed()
483 region.bdev = wc->ssd_dev->bdev; in ssd_commit_flushed()
487 if (unlikely(region.sector >= wc->metadata_sectors)) in ssd_commit_flushed()
489 if (unlikely(region.sector + region.count > wc->metadata_sectors)) in ssd_commit_flushed()
490 region.count = wc->metadata_sectors - region.sector; in ssd_commit_flushed()
492 region.sector += wc->start_sector; in ssd_commit_flushed()
497 req.mem.ptr.vma = (char *)wc->memory_map + (size_t)i * BITMAP_GRANULARITY; in ssd_commit_flushed()
498 req.client = wc->dm_io; in ssd_commit_flushed()
511 writecache_wait_for_ios(wc, WRITE); in ssd_commit_flushed()
513 writecache_disk_flush(wc, wc->ssd_dev); in ssd_commit_flushed()
515 memset(wc->dirty_bitmap, 0, wc->dirty_bitmap_size); in ssd_commit_flushed()
518 static void ssd_commit_superblock(struct dm_writecache *wc) in ssd_commit_superblock() argument
524 region.bdev = wc->ssd_dev->bdev; in ssd_commit_superblock()
528 if (unlikely(region.sector + region.count > wc->metadata_sectors)) in ssd_commit_superblock()
529 region.count = wc->metadata_sectors - region.sector; in ssd_commit_superblock()
531 region.sector += wc->start_sector; in ssd_commit_superblock()
536 req.mem.ptr.vma = (char *)wc->memory_map; in ssd_commit_superblock()
537 req.client = wc->dm_io; in ssd_commit_superblock()
543 writecache_error(wc, r, "error writing superblock"); in ssd_commit_superblock()
546 static void writecache_commit_flushed(struct dm_writecache *wc, bool wait_for_ios) in writecache_commit_flushed() argument
548 if (WC_MODE_PMEM(wc)) in writecache_commit_flushed()
551 ssd_commit_flushed(wc, wait_for_ios); in writecache_commit_flushed()
554 static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev) in writecache_disk_flush() argument
567 req.client = wc->dm_io; in writecache_disk_flush()
572 writecache_error(wc, r, "error flushing metadata: %d", r); in writecache_disk_flush()
578 static struct wc_entry *writecache_find_entry(struct dm_writecache *wc, in writecache_find_entry() argument
582 struct rb_node *node = wc->tree.rb_node; in writecache_find_entry()
589 if (read_original_sector(wc, e) == block) in writecache_find_entry()
592 node = (read_original_sector(wc, e) >= block ? in writecache_find_entry()
597 if (read_original_sector(wc, e) >= block) { in writecache_find_entry()
618 if (read_original_sector(wc, e2) != block) in writecache_find_entry()
624 static void writecache_insert_entry(struct dm_writecache *wc, struct wc_entry *ins) in writecache_insert_entry() argument
627 struct rb_node **node = &wc->tree.rb_node, *parent = NULL; in writecache_insert_entry()
632 if (read_original_sector(wc, e) > read_original_sector(wc, ins)) in writecache_insert_entry()
638 rb_insert_color(&ins->rb_node, &wc->tree); in writecache_insert_entry()
639 list_add(&ins->lru, &wc->lru); in writecache_insert_entry()
643 static void writecache_unlink(struct dm_writecache *wc, struct wc_entry *e) in writecache_unlink() argument
646 rb_erase(&e->rb_node, &wc->tree); in writecache_unlink()
649 static void writecache_add_to_freelist(struct dm_writecache *wc, struct wc_entry *e) in writecache_add_to_freelist() argument
651 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_add_to_freelist()
652 struct rb_node **node = &wc->freetree.rb_node, *parent = NULL; in writecache_add_to_freelist()
654 wc->current_free = e; in writecache_add_to_freelist()
663 rb_insert_color(&e->rb_node, &wc->freetree); in writecache_add_to_freelist()
665 list_add_tail(&e->lru, &wc->freelist); in writecache_add_to_freelist()
667 wc->freelist_size++; in writecache_add_to_freelist()
670 static inline void writecache_verify_watermark(struct dm_writecache *wc) in writecache_verify_watermark() argument
672 if (unlikely(wc->freelist_size + wc->writeback_size <= wc->freelist_high_watermark)) in writecache_verify_watermark()
673 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_verify_watermark()
678 struct dm_writecache *wc = from_timer(wc, t, max_age_timer); in writecache_max_age_timer() local
680 if (!dm_suspended(wc->ti) && !writecache_has_error(wc)) { in writecache_max_age_timer()
681 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_max_age_timer()
682 mod_timer(&wc->max_age_timer, jiffies + wc->max_age / MAX_AGE_DIV); in writecache_max_age_timer()
686 static struct wc_entry *writecache_pop_from_freelist(struct dm_writecache *wc, sector_t expected_se… in writecache_pop_from_freelist() argument
690 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_pop_from_freelist()
692 if (unlikely(!wc->current_free)) in writecache_pop_from_freelist()
694 e = wc->current_free; in writecache_pop_from_freelist()
695 if (expected_sector != (sector_t)-1 && unlikely(cache_sector(wc, e) != expected_sector)) in writecache_pop_from_freelist()
698 rb_erase(&e->rb_node, &wc->freetree); in writecache_pop_from_freelist()
700 next = rb_first(&wc->freetree); in writecache_pop_from_freelist()
701 wc->current_free = next ? container_of(next, struct wc_entry, rb_node) : NULL; in writecache_pop_from_freelist()
703 if (unlikely(list_empty(&wc->freelist))) in writecache_pop_from_freelist()
705 e = container_of(wc->freelist.next, struct wc_entry, lru); in writecache_pop_from_freelist()
706 if (expected_sector != (sector_t)-1 && unlikely(cache_sector(wc, e) != expected_sector)) in writecache_pop_from_freelist()
710 wc->freelist_size--; in writecache_pop_from_freelist()
712 writecache_verify_watermark(wc); in writecache_pop_from_freelist()
717 static void writecache_free_entry(struct dm_writecache *wc, struct wc_entry *e) in writecache_free_entry() argument
719 writecache_unlink(wc, e); in writecache_free_entry()
720 writecache_add_to_freelist(wc, e); in writecache_free_entry()
721 clear_seq_count(wc, e); in writecache_free_entry()
722 writecache_flush_region(wc, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_free_entry()
723 if (unlikely(waitqueue_active(&wc->freelist_wait))) in writecache_free_entry()
724 wake_up(&wc->freelist_wait); in writecache_free_entry()
727 static void writecache_wait_on_freelist(struct dm_writecache *wc) in writecache_wait_on_freelist() argument
731 prepare_to_wait(&wc->freelist_wait, &wait, TASK_UNINTERRUPTIBLE); in writecache_wait_on_freelist()
732 wc_unlock(wc); in writecache_wait_on_freelist()
734 finish_wait(&wc->freelist_wait, &wait); in writecache_wait_on_freelist()
735 wc_lock(wc); in writecache_wait_on_freelist()
738 static void writecache_poison_lists(struct dm_writecache *wc) in writecache_poison_lists() argument
743 memset(&wc->tree, -1, sizeof wc->tree); in writecache_poison_lists()
744 wc->lru.next = LIST_POISON1; in writecache_poison_lists()
745 wc->lru.prev = LIST_POISON2; in writecache_poison_lists()
746 wc->freelist.next = LIST_POISON1; in writecache_poison_lists()
747 wc->freelist.prev = LIST_POISON2; in writecache_poison_lists()
750 static void writecache_flush_entry(struct dm_writecache *wc, struct wc_entry *e) in writecache_flush_entry() argument
752 writecache_flush_region(wc, memory_entry(wc, e), sizeof(struct wc_memory_entry)); in writecache_flush_entry()
753 if (WC_MODE_PMEM(wc)) in writecache_flush_entry()
754 writecache_flush_region(wc, memory_data(wc, e), wc->block_size); in writecache_flush_entry()
757 static bool writecache_entry_is_committed(struct dm_writecache *wc, struct wc_entry *e) in writecache_entry_is_committed() argument
759 return read_seq_count(wc, e) < wc->seq_count; in writecache_entry_is_committed()
762 static void writecache_flush(struct dm_writecache *wc) in writecache_flush() argument
767 wc->uncommitted_blocks = 0; in writecache_flush()
768 del_timer(&wc->autocommit_timer); in writecache_flush()
770 if (list_empty(&wc->lru)) in writecache_flush()
773 e = container_of(wc->lru.next, struct wc_entry, lru); in writecache_flush()
774 if (writecache_entry_is_committed(wc, e)) { in writecache_flush()
775 if (wc->overwrote_committed) { in writecache_flush()
776 writecache_wait_for_ios(wc, WRITE); in writecache_flush()
777 writecache_disk_flush(wc, wc->ssd_dev); in writecache_flush()
778 wc->overwrote_committed = false; in writecache_flush()
783 writecache_flush_entry(wc, e); in writecache_flush()
784 if (unlikely(e->lru.next == &wc->lru)) in writecache_flush()
787 if (writecache_entry_is_committed(wc, e2)) in writecache_flush()
792 writecache_commit_flushed(wc, true); in writecache_flush()
794 wc->seq_count++; in writecache_flush()
795 pmem_assign(sb(wc)->seq_count, cpu_to_le64(wc->seq_count)); in writecache_flush()
796 if (WC_MODE_PMEM(wc)) in writecache_flush()
797 writecache_commit_flushed(wc, false); in writecache_flush()
799 ssd_commit_superblock(wc); in writecache_flush()
801 wc->overwrote_committed = false; in writecache_flush()
810 if (read_original_sector(wc, e2) == read_original_sector(wc, e) && in writecache_flush()
812 writecache_free_entry(wc, e2); in writecache_flush()
816 if (unlikely(e->lru.prev == &wc->lru)) in writecache_flush()
823 writecache_commit_flushed(wc, false); in writecache_flush()
828 struct dm_writecache *wc = container_of(work, struct dm_writecache, flush_work); in writecache_flush_work() local
830 wc_lock(wc); in writecache_flush_work()
831 writecache_flush(wc); in writecache_flush_work()
832 wc_unlock(wc); in writecache_flush_work()
837 struct dm_writecache *wc = from_timer(wc, t, autocommit_timer); in writecache_autocommit_timer() local
838 if (!writecache_has_error(wc)) in writecache_autocommit_timer()
839 queue_work(wc->writeback_wq, &wc->flush_work); in writecache_autocommit_timer()
842 static void writecache_schedule_autocommit(struct dm_writecache *wc) in writecache_schedule_autocommit() argument
844 if (!timer_pending(&wc->autocommit_timer)) in writecache_schedule_autocommit()
845 mod_timer(&wc->autocommit_timer, jiffies + wc->autocommit_jiffies); in writecache_schedule_autocommit()
848 static void writecache_discard(struct dm_writecache *wc, sector_t start, sector_t end) in writecache_discard() argument
853 e = writecache_find_entry(wc, start, WFE_RETURN_FOLLOWING | WFE_LOWEST_SEQ); in writecache_discard()
857 while (read_original_sector(wc, e) < end) { in writecache_discard()
862 if (!WC_MODE_PMEM(wc)) { in writecache_discard()
863 writecache_wait_for_ios(wc, READ); in writecache_discard()
864 writecache_wait_for_ios(wc, WRITE); in writecache_discard()
868 if (!writecache_entry_is_committed(wc, e)) in writecache_discard()
869 wc->uncommitted_blocks--; in writecache_discard()
870 writecache_free_entry(wc, e); in writecache_discard()
880 writecache_commit_flushed(wc, false); in writecache_discard()
883 static bool writecache_wait_for_writeback(struct dm_writecache *wc) in writecache_wait_for_writeback() argument
885 if (wc->writeback_size) { in writecache_wait_for_writeback()
886 writecache_wait_on_freelist(wc); in writecache_wait_for_writeback()
894 struct dm_writecache *wc = ti->private; in writecache_suspend() local
897 del_timer_sync(&wc->autocommit_timer); in writecache_suspend()
898 del_timer_sync(&wc->max_age_timer); in writecache_suspend()
900 wc_lock(wc); in writecache_suspend()
901 writecache_flush(wc); in writecache_suspend()
902 flush_on_suspend = wc->flush_on_suspend; in writecache_suspend()
904 wc->flush_on_suspend = false; in writecache_suspend()
905 wc->writeback_all++; in writecache_suspend()
906 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_suspend()
908 wc_unlock(wc); in writecache_suspend()
910 drain_workqueue(wc->writeback_wq); in writecache_suspend()
912 wc_lock(wc); in writecache_suspend()
914 wc->writeback_all--; in writecache_suspend()
915 while (writecache_wait_for_writeback(wc)); in writecache_suspend()
917 if (WC_MODE_PMEM(wc)) in writecache_suspend()
918 persistent_memory_flush_cache(wc->memory_map, wc->memory_map_size); in writecache_suspend()
920 writecache_poison_lists(wc); in writecache_suspend()
922 wc_unlock(wc); in writecache_suspend()
925 static int writecache_alloc_entries(struct dm_writecache *wc) in writecache_alloc_entries() argument
929 if (wc->entries) in writecache_alloc_entries()
931 wc->entries = vmalloc(array_size(sizeof(struct wc_entry), wc->n_blocks)); in writecache_alloc_entries()
932 if (!wc->entries) in writecache_alloc_entries()
934 for (b = 0; b < wc->n_blocks; b++) { in writecache_alloc_entries()
935 struct wc_entry *e = &wc->entries[b]; in writecache_alloc_entries()
944 static int writecache_read_metadata(struct dm_writecache *wc, sector_t n_sectors) in writecache_read_metadata() argument
949 region.bdev = wc->ssd_dev->bdev; in writecache_read_metadata()
950 region.sector = wc->start_sector; in writecache_read_metadata()
955 req.mem.ptr.vma = (char *)wc->memory_map; in writecache_read_metadata()
956 req.client = wc->dm_io; in writecache_read_metadata()
964 struct dm_writecache *wc = ti->private; in writecache_resume() local
970 wc_lock(wc); in writecache_resume()
972 if (WC_MODE_PMEM(wc)) { in writecache_resume()
973 persistent_memory_invalidate_cache(wc->memory_map, wc->memory_map_size); in writecache_resume()
975 r = writecache_read_metadata(wc, wc->metadata_sectors); in writecache_resume()
978 writecache_error(wc, r, "unable to read metadata: %d", r); in writecache_resume()
980 memset((char *)wc->memory_map + sb_entries_offset, -1, in writecache_resume()
981 (wc->metadata_sectors << SECTOR_SHIFT) - sb_entries_offset); in writecache_resume()
985 wc->tree = RB_ROOT; in writecache_resume()
986 INIT_LIST_HEAD(&wc->lru); in writecache_resume()
987 if (WC_MODE_SORT_FREELIST(wc)) { in writecache_resume()
988 wc->freetree = RB_ROOT; in writecache_resume()
989 wc->current_free = NULL; in writecache_resume()
991 INIT_LIST_HEAD(&wc->freelist); in writecache_resume()
993 wc->freelist_size = 0; in writecache_resume()
995 r = copy_mc_to_kernel(&sb_seq_count, &sb(wc)->seq_count, in writecache_resume()
998 writecache_error(wc, r, "hardware memory error when reading superblock: %d", r); in writecache_resume()
1001 wc->seq_count = le64_to_cpu(sb_seq_count); in writecache_resume()
1004 for (b = 0; b < wc->n_blocks; b++) { in writecache_resume()
1005 struct wc_entry *e = &wc->entries[b]; in writecache_resume()
1007 if (writecache_has_error(wc)) { in writecache_resume()
1012 r = copy_mc_to_kernel(&wme, memory_entry(wc, e), in writecache_resume()
1015 writecache_error(wc, r, "hardware memory error when reading metadata entry %lu: %d", in writecache_resume()
1026 for (b = 0; b < wc->n_blocks; b++) { in writecache_resume()
1027 struct wc_entry *e = &wc->entries[b]; in writecache_resume()
1028 if (!writecache_entry_is_committed(wc, e)) { in writecache_resume()
1029 if (read_seq_count(wc, e) != -1) { in writecache_resume()
1031 clear_seq_count(wc, e); in writecache_resume()
1034 writecache_add_to_freelist(wc, e); in writecache_resume()
1038 old = writecache_find_entry(wc, read_original_sector(wc, e), 0); in writecache_resume()
1040 writecache_insert_entry(wc, e); in writecache_resume()
1042 if (read_seq_count(wc, old) == read_seq_count(wc, e)) { in writecache_resume()
1043 writecache_error(wc, -EINVAL, in writecache_resume()
1045 (unsigned long long)b, (unsigned long long)read_original_sector(wc, e), in writecache_resume()
1046 (unsigned long long)read_seq_count(wc, e)); in writecache_resume()
1048 if (read_seq_count(wc, old) > read_seq_count(wc, e)) { in writecache_resume()
1051 writecache_free_entry(wc, old); in writecache_resume()
1052 writecache_insert_entry(wc, e); in writecache_resume()
1061 writecache_flush_all_metadata(wc); in writecache_resume()
1062 writecache_commit_flushed(wc, false); in writecache_resume()
1065 writecache_verify_watermark(wc); in writecache_resume()
1067 if (wc->max_age != MAX_AGE_UNSPECIFIED) in writecache_resume()
1068 mod_timer(&wc->max_age_timer, jiffies + wc->max_age / MAX_AGE_DIV); in writecache_resume()
1070 wc_unlock(wc); in writecache_resume()
1073 static int process_flush_mesg(unsigned argc, char **argv, struct dm_writecache *wc) in process_flush_mesg() argument
1078 wc_lock(wc); in process_flush_mesg()
1079 if (dm_suspended(wc->ti)) { in process_flush_mesg()
1080 wc_unlock(wc); in process_flush_mesg()
1083 if (writecache_has_error(wc)) { in process_flush_mesg()
1084 wc_unlock(wc); in process_flush_mesg()
1088 writecache_flush(wc); in process_flush_mesg()
1089 wc->writeback_all++; in process_flush_mesg()
1090 queue_work(wc->writeback_wq, &wc->writeback_work); in process_flush_mesg()
1091 wc_unlock(wc); in process_flush_mesg()
1093 flush_workqueue(wc->writeback_wq); in process_flush_mesg()
1095 wc_lock(wc); in process_flush_mesg()
1096 wc->writeback_all--; in process_flush_mesg()
1097 if (writecache_has_error(wc)) { in process_flush_mesg()
1098 wc_unlock(wc); in process_flush_mesg()
1101 wc_unlock(wc); in process_flush_mesg()
1106 static int process_flush_on_suspend_mesg(unsigned argc, char **argv, struct dm_writecache *wc) in process_flush_on_suspend_mesg() argument
1111 wc_lock(wc); in process_flush_on_suspend_mesg()
1112 wc->flush_on_suspend = true; in process_flush_on_suspend_mesg()
1113 wc_unlock(wc); in process_flush_on_suspend_mesg()
1118 static void activate_cleaner(struct dm_writecache *wc) in activate_cleaner() argument
1120 wc->flush_on_suspend = true; in activate_cleaner()
1121 wc->cleaner = true; in activate_cleaner()
1122 wc->freelist_high_watermark = wc->n_blocks; in activate_cleaner()
1123 wc->freelist_low_watermark = wc->n_blocks; in activate_cleaner()
1126 static int process_cleaner_mesg(unsigned argc, char **argv, struct dm_writecache *wc) in process_cleaner_mesg() argument
1131 wc_lock(wc); in process_cleaner_mesg()
1132 activate_cleaner(wc); in process_cleaner_mesg()
1133 if (!dm_suspended(wc->ti)) in process_cleaner_mesg()
1134 writecache_verify_watermark(wc); in process_cleaner_mesg()
1135 wc_unlock(wc); in process_cleaner_mesg()
1144 struct dm_writecache *wc = ti->private; in writecache_message() local
1147 r = process_flush_mesg(argc, argv, wc); in writecache_message()
1149 r = process_flush_on_suspend_mesg(argc, argv, wc); in writecache_message()
1151 r = process_cleaner_mesg(argc, argv, wc); in writecache_message()
1194 static void bio_copy_block(struct dm_writecache *wc, struct bio *bio, void *data) in bio_copy_block() argument
1200 unsigned remaining_size = wc->block_size; in bio_copy_block()
1214 writecache_error(wc, r, "hardware memory error when reading data: %d", r); in bio_copy_block()
1232 struct dm_writecache *wc = data; in writecache_flush_thread() local
1237 wc_lock(wc); in writecache_flush_thread()
1238 bio = bio_list_pop(&wc->flush_list); in writecache_flush_thread()
1241 wc_unlock(wc); in writecache_flush_thread()
1253 writecache_discard(wc, bio->bi_iter.bi_sector, in writecache_flush_thread()
1255 wc_unlock(wc); in writecache_flush_thread()
1256 bio_set_dev(bio, wc->dev->bdev); in writecache_flush_thread()
1259 writecache_flush(wc); in writecache_flush_thread()
1260 wc_unlock(wc); in writecache_flush_thread()
1261 if (writecache_has_error(wc)) in writecache_flush_thread()
1270 static void writecache_offload_bio(struct dm_writecache *wc, struct bio *bio) in writecache_offload_bio() argument
1272 if (bio_list_empty(&wc->flush_list)) in writecache_offload_bio()
1273 wake_up_process(wc->flush_thread); in writecache_offload_bio()
1274 bio_list_add(&wc->flush_list, bio); in writecache_offload_bio()
1280 struct dm_writecache *wc = ti->private; in writecache_map() local
1284 wc_lock(wc); in writecache_map()
1287 if (writecache_has_error(wc)) in writecache_map()
1289 if (WC_MODE_PMEM(wc)) { in writecache_map()
1290 writecache_flush(wc); in writecache_map()
1291 if (writecache_has_error(wc)) in writecache_map()
1295 writecache_offload_bio(wc, bio); in writecache_map()
1303 (wc->block_size / 512 - 1)) != 0)) { in writecache_map()
1306 bio->bi_iter.bi_size, wc->block_size); in writecache_map()
1311 if (writecache_has_error(wc)) in writecache_map()
1313 if (WC_MODE_PMEM(wc)) { in writecache_map()
1314 writecache_discard(wc, bio->bi_iter.bi_sector, bio_end_sector(bio)); in writecache_map()
1317 writecache_offload_bio(wc, bio); in writecache_map()
1324 e = writecache_find_entry(wc, bio->bi_iter.bi_sector, WFE_RETURN_FOLLOWING); in writecache_map()
1325 if (e && read_original_sector(wc, e) == bio->bi_iter.bi_sector) { in writecache_map()
1326 if (WC_MODE_PMEM(wc)) { in writecache_map()
1327 bio_copy_block(wc, bio, memory_data(wc, e)); in writecache_map()
1332 dm_accept_partial_bio(bio, wc->block_size >> SECTOR_SHIFT); in writecache_map()
1333 bio_set_dev(bio, wc->ssd_dev->bdev); in writecache_map()
1334 bio->bi_iter.bi_sector = cache_sector(wc, e); in writecache_map()
1335 if (!writecache_entry_is_committed(wc, e)) in writecache_map()
1336 writecache_wait_for_ios(wc, WRITE); in writecache_map()
1342 read_original_sector(wc, e) - bio->bi_iter.bi_sector; in writecache_map()
1352 if (writecache_has_error(wc)) in writecache_map()
1354 e = writecache_find_entry(wc, bio->bi_iter.bi_sector, 0); in writecache_map()
1356 if (!writecache_entry_is_committed(wc, e)) in writecache_map()
1358 if (!WC_MODE_PMEM(wc) && !e->write_in_progress) { in writecache_map()
1359 wc->overwrote_committed = true; in writecache_map()
1364 if (unlikely(wc->cleaner)) in writecache_map()
1367 e = writecache_pop_from_freelist(wc, (sector_t)-1); in writecache_map()
1371 e = writecache_find_entry(wc, bio->bi_iter.bi_sector, WFE_RETURN_FOLLOWING); in writecache_map()
1373 sector_t next_boundary = read_original_sector(wc, e) - bio->bi_iter.bi_sector; in writecache_map()
1381 writecache_wait_on_freelist(wc); in writecache_map()
1384 write_original_sector_seq_count(wc, e, bio->bi_iter.bi_sector, wc->seq_count); in writecache_map()
1385 writecache_insert_entry(wc, e); in writecache_map()
1386 wc->uncommitted_blocks++; in writecache_map()
1388 if (WC_MODE_PMEM(wc)) { in writecache_map()
1389 bio_copy_block(wc, bio, memory_data(wc, e)); in writecache_map()
1391 unsigned bio_size = wc->block_size; in writecache_map()
1392 sector_t start_cache_sec = cache_sector(wc, e); in writecache_map()
1396 struct wc_entry *f = writecache_pop_from_freelist(wc, current_cache_sec); in writecache_map()
1399 write_original_sector_seq_count(wc, f, bio->bi_iter.bi_sector + in writecache_map()
1400 (bio_size >> SECTOR_SHIFT), wc->seq_count); in writecache_map()
1401 writecache_insert_entry(wc, f); in writecache_map()
1402 wc->uncommitted_blocks++; in writecache_map()
1403 bio_size += wc->block_size; in writecache_map()
1404 current_cache_sec += wc->block_size >> SECTOR_SHIFT; in writecache_map()
1407 bio_set_dev(bio, wc->ssd_dev->bdev); in writecache_map()
1411 if (unlikely(wc->uncommitted_blocks >= wc->autocommit_blocks)) { in writecache_map()
1412 wc->uncommitted_blocks = 0; in writecache_map()
1413 queue_work(wc->writeback_wq, &wc->flush_work); in writecache_map()
1415 writecache_schedule_autocommit(wc); in writecache_map()
1422 wc->uncommitted_blocks >= wc->autocommit_blocks)) in writecache_map()
1423 writecache_flush(wc); in writecache_map()
1425 writecache_schedule_autocommit(wc); in writecache_map()
1430 bio_set_dev(bio, wc->dev->bdev); in writecache_map()
1431 wc_unlock(wc); in writecache_map()
1437 atomic_inc(&wc->bio_in_progress[bio_data_dir(bio)]); in writecache_map()
1438 wc_unlock(wc); in writecache_map()
1442 wc_unlock(wc); in writecache_map()
1447 wc_unlock(wc); in writecache_map()
1451 wc_unlock(wc); in writecache_map()
1458 struct dm_writecache *wc = ti->private; in writecache_end_io() local
1462 if (atomic_dec_and_test(&wc->bio_in_progress[dir])) in writecache_end_io()
1463 if (unlikely(waitqueue_active(&wc->bio_in_progress_wait[dir]))) in writecache_end_io()
1464 wake_up(&wc->bio_in_progress_wait[dir]); in writecache_end_io()
1472 struct dm_writecache *wc = ti->private; in writecache_iterate_devices() local
1474 return fn(ti, wc->dev, 0, ti->len, data); in writecache_iterate_devices()
1479 struct dm_writecache *wc = ti->private; in writecache_io_hints() local
1481 if (limits->logical_block_size < wc->block_size) in writecache_io_hints()
1482 limits->logical_block_size = wc->block_size; in writecache_io_hints()
1484 if (limits->physical_block_size < wc->block_size) in writecache_io_hints()
1485 limits->physical_block_size = wc->block_size; in writecache_io_hints()
1487 if (limits->io_min < wc->block_size) in writecache_io_hints()
1488 limits->io_min = wc->block_size; in writecache_io_hints()
1495 struct dm_writecache *wc = wb->wc; in writecache_writeback_endio() local
1498 raw_spin_lock_irqsave(&wc->endio_list_lock, flags); in writecache_writeback_endio()
1499 if (unlikely(list_empty(&wc->endio_list))) in writecache_writeback_endio()
1500 wake_up_process(wc->endio_thread); in writecache_writeback_endio()
1501 list_add_tail(&wb->endio_entry, &wc->endio_list); in writecache_writeback_endio()
1502 raw_spin_unlock_irqrestore(&wc->endio_list_lock, flags); in writecache_writeback_endio()
1508 struct dm_writecache *wc = c->wc; in writecache_copy_endio() local
1512 raw_spin_lock_irq(&wc->endio_list_lock); in writecache_copy_endio()
1513 if (unlikely(list_empty(&wc->endio_list))) in writecache_copy_endio()
1514 wake_up_process(wc->endio_thread); in writecache_copy_endio()
1515 list_add_tail(&c->endio_entry, &wc->endio_list); in writecache_copy_endio()
1516 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_copy_endio()
1519 static void __writecache_endio_pmem(struct dm_writecache *wc, struct list_head *list) in __writecache_endio_pmem() argument
1531 writecache_error(wc, blk_status_to_errno(wb->bio.bi_status), in __writecache_endio_pmem()
1539 if (!writecache_has_error(wc)) in __writecache_endio_pmem()
1540 writecache_free_entry(wc, e); in __writecache_endio_pmem()
1541 BUG_ON(!wc->writeback_size); in __writecache_endio_pmem()
1542 wc->writeback_size--; in __writecache_endio_pmem()
1545 writecache_commit_flushed(wc, false); in __writecache_endio_pmem()
1546 wc_unlock(wc); in __writecache_endio_pmem()
1547 wc_lock(wc); in __writecache_endio_pmem()
1558 static void __writecache_endio_ssd(struct dm_writecache *wc, struct list_head *list) in __writecache_endio_ssd() argument
1568 writecache_error(wc, c->error, "copy error"); in __writecache_endio_ssd()
1575 if (!writecache_has_error(wc)) in __writecache_endio_ssd()
1576 writecache_free_entry(wc, e); in __writecache_endio_ssd()
1578 BUG_ON(!wc->writeback_size); in __writecache_endio_ssd()
1579 wc->writeback_size--; in __writecache_endio_ssd()
1582 mempool_free(c, &wc->copy_pool); in __writecache_endio_ssd()
1588 struct dm_writecache *wc = data; in writecache_endio_thread() local
1593 raw_spin_lock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1594 if (!list_empty(&wc->endio_list)) in writecache_endio_thread()
1597 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1609 list = wc->endio_list; in writecache_endio_thread()
1611 INIT_LIST_HEAD(&wc->endio_list); in writecache_endio_thread()
1612 raw_spin_unlock_irq(&wc->endio_list_lock); in writecache_endio_thread()
1614 if (!WC_MODE_FUA(wc)) in writecache_endio_thread()
1615 writecache_disk_flush(wc, wc->dev); in writecache_endio_thread()
1617 wc_lock(wc); in writecache_endio_thread()
1619 if (WC_MODE_PMEM(wc)) { in writecache_endio_thread()
1620 __writecache_endio_pmem(wc, &list); in writecache_endio_thread()
1622 __writecache_endio_ssd(wc, &list); in writecache_endio_thread()
1623 writecache_wait_for_ios(wc, READ); in writecache_endio_thread()
1626 writecache_commit_flushed(wc, false); in writecache_endio_thread()
1628 wc_unlock(wc); in writecache_endio_thread()
1636 struct dm_writecache *wc = wb->wc; in wc_add_block() local
1637 unsigned block_size = wc->block_size; in wc_add_block()
1638 void *address = memory_data(wc, e); in wc_add_block()
1650 static void __writeback_throttle(struct dm_writecache *wc, struct writeback_list *wbl) in __writeback_throttle() argument
1652 if (unlikely(wc->max_writeback_jobs)) { in __writeback_throttle()
1653 if (READ_ONCE(wc->writeback_size) - wbl->size >= wc->max_writeback_jobs) { in __writeback_throttle()
1654 wc_lock(wc); in __writeback_throttle()
1655 while (wc->writeback_size - wbl->size >= wc->max_writeback_jobs) in __writeback_throttle()
1656 writecache_wait_on_freelist(wc); in __writeback_throttle()
1657 wc_unlock(wc); in __writeback_throttle()
1663 static void __writecache_writeback_pmem(struct dm_writecache *wc, struct writeback_list *wbl) in __writecache_writeback_pmem() argument
1677 bio = bio_alloc_bioset(GFP_NOIO, max_pages, &wc->bio_set); in __writecache_writeback_pmem()
1679 wb->wc = wc; in __writecache_writeback_pmem()
1681 bio_set_dev(bio, wc->dev->bdev); in __writecache_writeback_pmem()
1682 bio->bi_iter.bi_sector = read_original_sector(wc, e); in __writecache_writeback_pmem()
1698 if (read_original_sector(wc, f) != in __writecache_writeback_pmem()
1699 read_original_sector(wc, e) + (wc->block_size >> SECTOR_SHIFT)) in __writecache_writeback_pmem()
1708 bio_set_op_attrs(bio, REQ_OP_WRITE, WC_MODE_FUA(wc) * REQ_FUA); in __writecache_writeback_pmem()
1709 if (writecache_has_error(wc)) { in __writecache_writeback_pmem()
1716 __writeback_throttle(wc, wbl); in __writecache_writeback_pmem()
1720 static void __writecache_writeback_ssd(struct dm_writecache *wc, struct writeback_list *wbl) in __writecache_writeback_ssd() argument
1733 n_sectors = e->wc_list_contiguous << (wc->block_size_bits - SECTOR_SHIFT); in __writecache_writeback_ssd()
1735 from.bdev = wc->ssd_dev->bdev; in __writecache_writeback_ssd()
1736 from.sector = cache_sector(wc, e); in __writecache_writeback_ssd()
1738 to.bdev = wc->dev->bdev; in __writecache_writeback_ssd()
1739 to.sector = read_original_sector(wc, e); in __writecache_writeback_ssd()
1742 c = mempool_alloc(&wc->copy_pool, GFP_NOIO); in __writecache_writeback_ssd()
1743 c->wc = wc; in __writecache_writeback_ssd()
1747 while ((n_sectors -= wc->block_size >> SECTOR_SHIFT)) { in __writecache_writeback_ssd()
1755 dm_kcopyd_copy(wc->dm_kcopyd, &from, 1, &to, 0, writecache_copy_endio, c); in __writecache_writeback_ssd()
1757 __writeback_throttle(wc, wbl); in __writecache_writeback_ssd()
1763 struct dm_writecache *wc = container_of(work, struct dm_writecache, writeback_work); in writecache_writeback() local
1771 wc_lock(wc); in writecache_writeback()
1773 if (writecache_has_error(wc)) { in writecache_writeback()
1774 wc_unlock(wc); in writecache_writeback()
1778 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1779 if (writecache_wait_for_writeback(wc)) in writecache_writeback()
1783 if (wc->overwrote_committed) { in writecache_writeback()
1784 writecache_wait_for_ios(wc, WRITE); in writecache_writeback()
1791 while (!list_empty(&wc->lru) && in writecache_writeback()
1792 (wc->writeback_all || in writecache_writeback()
1793 wc->freelist_size + wc->writeback_size <= wc->freelist_low_watermark || in writecache_writeback()
1794 (jiffies - container_of(wc->lru.prev, struct wc_entry, lru)->age >= in writecache_writeback()
1795 wc->max_age - wc->max_age / MAX_AGE_DIV))) { in writecache_writeback()
1799 likely(!wc->writeback_all) && likely(!dm_suspended(wc->ti))) { in writecache_writeback()
1800 queue_work(wc->writeback_wq, &wc->writeback_work); in writecache_writeback()
1804 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1806 writecache_flush(wc); in writecache_writeback()
1807 e = container_of(rb_first(&wc->tree), struct wc_entry, rb_node); in writecache_writeback()
1811 e = container_of(wc->lru.prev, struct wc_entry, lru); in writecache_writeback()
1813 if (unlikely(!writecache_entry_is_committed(wc, e))) { in writecache_writeback()
1814 writecache_flush(wc); in writecache_writeback()
1819 if (unlikely(read_original_sector(wc, f) == in writecache_writeback()
1820 read_original_sector(wc, e))) { in writecache_writeback()
1828 wc->writeback_size++; in writecache_writeback()
1842 if (unlikely(read_original_sector(wc, g) == in writecache_writeback()
1843 read_original_sector(wc, f))) { in writecache_writeback()
1847 if (read_original_sector(wc, g) != in writecache_writeback()
1848 read_original_sector(wc, f) + (wc->block_size >> SECTOR_SHIFT)) in writecache_writeback()
1852 if (unlikely(!writecache_entry_is_committed(wc, g))) in writecache_writeback()
1855 if (!WC_MODE_PMEM(wc)) { in writecache_writeback()
1861 //if (unlikely(n_walked > WRITEBACK_LATENCY) && likely(!wc->writeback_all)) in writecache_writeback()
1864 wc->writeback_size++; in writecache_writeback()
1873 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1885 list_splice_tail(&skipped, &wc->lru); in writecache_writeback()
1891 writecache_wait_for_writeback(wc); in writecache_writeback()
1894 wc_unlock(wc); in writecache_writeback()
1898 if (WC_MODE_PMEM(wc)) in writecache_writeback()
1899 __writecache_writeback_pmem(wc, &wbl); in writecache_writeback()
1901 __writecache_writeback_ssd(wc, &wbl); in writecache_writeback()
1905 if (unlikely(wc->writeback_all)) { in writecache_writeback()
1906 wc_lock(wc); in writecache_writeback()
1907 while (writecache_wait_for_writeback(wc)); in writecache_writeback()
1908 wc_unlock(wc); in writecache_writeback()
1947 static int init_memory(struct dm_writecache *wc) in init_memory() argument
1952 r = calculate_memory_size(wc->memory_map_size, wc->block_size, &wc->n_blocks, NULL); in init_memory()
1956 r = writecache_alloc_entries(wc); in init_memory()
1960 for (b = 0; b < ARRAY_SIZE(sb(wc)->padding); b++) in init_memory()
1961 pmem_assign(sb(wc)->padding[b], cpu_to_le64(0)); in init_memory()
1962 pmem_assign(sb(wc)->version, cpu_to_le32(MEMORY_SUPERBLOCK_VERSION)); in init_memory()
1963 pmem_assign(sb(wc)->block_size, cpu_to_le32(wc->block_size)); in init_memory()
1964 pmem_assign(sb(wc)->n_blocks, cpu_to_le64(wc->n_blocks)); in init_memory()
1965 pmem_assign(sb(wc)->seq_count, cpu_to_le64(0)); in init_memory()
1967 for (b = 0; b < wc->n_blocks; b++) { in init_memory()
1968 write_original_sector_seq_count(wc, &wc->entries[b], -1, -1); in init_memory()
1972 writecache_flush_all_metadata(wc); in init_memory()
1973 writecache_commit_flushed(wc, false); in init_memory()
1974 pmem_assign(sb(wc)->magic, cpu_to_le32(MEMORY_SUPERBLOCK_MAGIC)); in init_memory()
1975 writecache_flush_region(wc, &sb(wc)->magic, sizeof sb(wc)->magic); in init_memory()
1976 writecache_commit_flushed(wc, false); in init_memory()
1983 struct dm_writecache *wc = ti->private; in writecache_dtr() local
1985 if (!wc) in writecache_dtr()
1988 if (wc->endio_thread) in writecache_dtr()
1989 kthread_stop(wc->endio_thread); in writecache_dtr()
1991 if (wc->flush_thread) in writecache_dtr()
1992 kthread_stop(wc->flush_thread); in writecache_dtr()
1994 bioset_exit(&wc->bio_set); in writecache_dtr()
1996 mempool_exit(&wc->copy_pool); in writecache_dtr()
1998 if (wc->writeback_wq) in writecache_dtr()
1999 destroy_workqueue(wc->writeback_wq); in writecache_dtr()
2001 if (wc->dev) in writecache_dtr()
2002 dm_put_device(ti, wc->dev); in writecache_dtr()
2004 if (wc->ssd_dev) in writecache_dtr()
2005 dm_put_device(ti, wc->ssd_dev); in writecache_dtr()
2007 if (wc->entries) in writecache_dtr()
2008 vfree(wc->entries); in writecache_dtr()
2010 if (wc->memory_map) { in writecache_dtr()
2011 if (WC_MODE_PMEM(wc)) in writecache_dtr()
2012 persistent_memory_release(wc); in writecache_dtr()
2014 vfree(wc->memory_map); in writecache_dtr()
2017 if (wc->dm_kcopyd) in writecache_dtr()
2018 dm_kcopyd_client_destroy(wc->dm_kcopyd); in writecache_dtr()
2020 if (wc->dm_io) in writecache_dtr()
2021 dm_io_client_destroy(wc->dm_io); in writecache_dtr()
2023 if (wc->dirty_bitmap) in writecache_dtr()
2024 vfree(wc->dirty_bitmap); in writecache_dtr()
2026 kfree(wc); in writecache_dtr()
2031 struct dm_writecache *wc; in writecache_ctr() local
2050 wc = kzalloc(sizeof(struct dm_writecache), GFP_KERNEL); in writecache_ctr()
2051 if (!wc) { in writecache_ctr()
2056 ti->private = wc; in writecache_ctr()
2057 wc->ti = ti; in writecache_ctr()
2059 mutex_init(&wc->lock); in writecache_ctr()
2060 wc->max_age = MAX_AGE_UNSPECIFIED; in writecache_ctr()
2061 writecache_poison_lists(wc); in writecache_ctr()
2062 init_waitqueue_head(&wc->freelist_wait); in writecache_ctr()
2063 timer_setup(&wc->autocommit_timer, writecache_autocommit_timer, 0); in writecache_ctr()
2064 timer_setup(&wc->max_age_timer, writecache_max_age_timer, 0); in writecache_ctr()
2067 atomic_set(&wc->bio_in_progress[i], 0); in writecache_ctr()
2068 init_waitqueue_head(&wc->bio_in_progress_wait[i]); in writecache_ctr()
2071 wc->dm_io = dm_io_client_create(); in writecache_ctr()
2072 if (IS_ERR(wc->dm_io)) { in writecache_ctr()
2073 r = PTR_ERR(wc->dm_io); in writecache_ctr()
2075 wc->dm_io = NULL; in writecache_ctr()
2079 wc->writeback_wq = alloc_workqueue("writecache-writeback", WQ_MEM_RECLAIM, 1); in writecache_ctr()
2080 if (!wc->writeback_wq) { in writecache_ctr()
2085 INIT_WORK(&wc->writeback_work, writecache_writeback); in writecache_ctr()
2086 INIT_WORK(&wc->flush_work, writecache_flush_work); in writecache_ctr()
2088 raw_spin_lock_init(&wc->endio_list_lock); in writecache_ctr()
2089 INIT_LIST_HEAD(&wc->endio_list); in writecache_ctr()
2090 wc->endio_thread = kthread_create(writecache_endio_thread, wc, "writecache_endio"); in writecache_ctr()
2091 if (IS_ERR(wc->endio_thread)) { in writecache_ctr()
2092 r = PTR_ERR(wc->endio_thread); in writecache_ctr()
2093 wc->endio_thread = NULL; in writecache_ctr()
2097 wake_up_process(wc->endio_thread); in writecache_ctr()
2107 wc->pmem_mode = false; in writecache_ctr()
2110 wc->pmem_mode = true; in writecache_ctr()
2111 wc->writeback_fua = true; in writecache_ctr()
2126 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2127 r = bioset_init(&wc->bio_set, BIO_POOL_SIZE, in writecache_ctr()
2135 r = mempool_init_kmalloc_pool(&wc->copy_pool, 1, sizeof(struct copy_struct)); in writecache_ctr()
2148 r = dm_get_device(ti, string, dm_table_get_mode(ti->table), &wc->dev); in writecache_ctr()
2161 r = dm_get_device(ti, string, dm_table_get_mode(ti->table), &wc->ssd_dev); in writecache_ctr()
2166 wc->memory_map_size = i_size_read(wc->ssd_dev->bdev->bd_inode); in writecache_ctr()
2174 if (sscanf(string, "%u%c", &wc->block_size, &dummy) != 1 || in writecache_ctr()
2175 wc->block_size < 512 || wc->block_size > PAGE_SIZE || in writecache_ctr()
2176 (wc->block_size & (wc->block_size - 1))) { in writecache_ctr()
2181 if (wc->block_size < bdev_logical_block_size(wc->dev->bdev) || in writecache_ctr()
2182 wc->block_size < bdev_logical_block_size(wc->ssd_dev->bdev)) { in writecache_ctr()
2187 wc->block_size_bits = __ffs(wc->block_size); in writecache_ctr()
2189 wc->max_writeback_jobs = MAX_WRITEBACK_JOBS; in writecache_ctr()
2190 wc->autocommit_blocks = !WC_MODE_PMEM(wc) ? AUTOCOMMIT_BLOCKS_SSD : AUTOCOMMIT_BLOCKS_PMEM; in writecache_ctr()
2191 wc->autocommit_jiffies = msecs_to_jiffies(AUTOCOMMIT_MSEC); in writecache_ctr()
2207 wc->start_sector = start_sector; in writecache_ctr()
2208 if (wc->start_sector != start_sector || in writecache_ctr()
2209 wc->start_sector >= wc->memory_map_size >> SECTOR_SHIFT) in writecache_ctr()
2217 wc->high_wm_percent_set = true; in writecache_ctr()
2224 wc->low_wm_percent_set = true; in writecache_ctr()
2227 if (sscanf(string, "%u%c", &wc->max_writeback_jobs, &dummy) != 1) in writecache_ctr()
2229 wc->max_writeback_jobs_set = true; in writecache_ctr()
2232 if (sscanf(string, "%u%c", &wc->autocommit_blocks, &dummy) != 1) in writecache_ctr()
2234 wc->autocommit_blocks_set = true; in writecache_ctr()
2242 wc->autocommit_jiffies = msecs_to_jiffies(autocommit_msecs); in writecache_ctr()
2243 wc->autocommit_time_set = true; in writecache_ctr()
2251 wc->max_age = msecs_to_jiffies(max_age_msecs); in writecache_ctr()
2253 wc->cleaner = true; in writecache_ctr()
2255 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2256 wc->writeback_fua = true; in writecache_ctr()
2257 wc->writeback_fua_set = true; in writecache_ctr()
2260 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2261 wc->writeback_fua = false; in writecache_ctr()
2262 wc->writeback_fua_set = true; in writecache_ctr()
2278 if (WC_MODE_PMEM(wc)) { in writecache_ctr()
2279 if (!dax_synchronous(wc->ssd_dev->dax_dev)) { in writecache_ctr()
2285 r = persistent_memory_claim(wc); in writecache_ctr()
2294 wc->memory_map_size -= (uint64_t)wc->start_sector << SECTOR_SHIFT; in writecache_ctr()
2296 bio_list_init(&wc->flush_list); in writecache_ctr()
2297 wc->flush_thread = kthread_create(writecache_flush_thread, wc, "dm_writecache_flush"); in writecache_ctr()
2298 if (IS_ERR(wc->flush_thread)) { in writecache_ctr()
2299 r = PTR_ERR(wc->flush_thread); in writecache_ctr()
2300 wc->flush_thread = NULL; in writecache_ctr()
2304 wake_up_process(wc->flush_thread); in writecache_ctr()
2306 r = calculate_memory_size(wc->memory_map_size, wc->block_size, in writecache_ctr()
2313 n_bitmap_bits = (((uint64_t)n_metadata_blocks << wc->block_size_bits) + in writecache_ctr()
2322 wc->memory_map = vmalloc(n_metadata_blocks << wc->block_size_bits); in writecache_ctr()
2323 if (!wc->memory_map) { in writecache_ctr()
2329 wc->dm_kcopyd = dm_kcopyd_client_create(&dm_kcopyd_throttle); in writecache_ctr()
2330 if (IS_ERR(wc->dm_kcopyd)) { in writecache_ctr()
2331 r = PTR_ERR(wc->dm_kcopyd); in writecache_ctr()
2333 wc->dm_kcopyd = NULL; in writecache_ctr()
2337 wc->metadata_sectors = n_metadata_blocks << (wc->block_size_bits - SECTOR_SHIFT); in writecache_ctr()
2338 wc->dirty_bitmap_size = (n_bitmap_bits + BITS_PER_LONG - 1) / in writecache_ctr()
2340 wc->dirty_bitmap = vzalloc(wc->dirty_bitmap_size); in writecache_ctr()
2341 if (!wc->dirty_bitmap) { in writecache_ctr()
2347 r = writecache_read_metadata(wc, wc->block_size >> SECTOR_SHIFT); in writecache_ctr()
2354 r = copy_mc_to_kernel(&s, sb(wc), sizeof(struct wc_memory_superblock)); in writecache_ctr()
2360 r = init_memory(wc); in writecache_ctr()
2365 r = copy_mc_to_kernel(&s, sb(wc), in writecache_ctr()
2385 if (le32_to_cpu(s.block_size) != wc->block_size) { in writecache_ctr()
2391 wc->n_blocks = le64_to_cpu(s.n_blocks); in writecache_ctr()
2393 offset = wc->n_blocks * sizeof(struct wc_memory_entry); in writecache_ctr()
2394 if (offset / sizeof(struct wc_memory_entry) != le64_to_cpu(sb(wc)->n_blocks)) { in writecache_ctr()
2403 offset = (offset + wc->block_size - 1) & ~(size_t)(wc->block_size - 1); in writecache_ctr()
2404 data_size = wc->n_blocks * (size_t)wc->block_size; in writecache_ctr()
2405 if (!offset || (data_size / wc->block_size != wc->n_blocks) || in writecache_ctr()
2408 if (offset + data_size > wc->memory_map_size) { in writecache_ctr()
2414 wc->metadata_sectors = offset >> SECTOR_SHIFT; in writecache_ctr()
2415 wc->block_start = (char *)sb(wc) + offset; in writecache_ctr()
2417 x = (uint64_t)wc->n_blocks * (100 - high_wm_percent); in writecache_ctr()
2420 wc->freelist_high_watermark = x; in writecache_ctr()
2421 x = (uint64_t)wc->n_blocks * (100 - low_wm_percent); in writecache_ctr()
2424 wc->freelist_low_watermark = x; in writecache_ctr()
2426 if (wc->cleaner) in writecache_ctr()
2427 activate_cleaner(wc); in writecache_ctr()
2429 r = writecache_alloc_entries(wc); in writecache_ctr()
2439 if (WC_MODE_PMEM(wc)) in writecache_ctr()
2440 persistent_memory_flush_cache(wc->memory_map, wc->memory_map_size); in writecache_ctr()
2455 struct dm_writecache *wc = ti->private; in writecache_status() local
2462 DMEMIT("%ld %llu %llu %llu", writecache_has_error(wc), in writecache_status()
2463 (unsigned long long)wc->n_blocks, (unsigned long long)wc->freelist_size, in writecache_status()
2464 (unsigned long long)wc->writeback_size); in writecache_status()
2467 DMEMIT("%c %s %s %u ", WC_MODE_PMEM(wc) ? 'p' : 's', in writecache_status()
2468 wc->dev->name, wc->ssd_dev->name, wc->block_size); in writecache_status()
2470 if (wc->start_sector) in writecache_status()
2472 if (wc->high_wm_percent_set && !wc->cleaner) in writecache_status()
2474 if (wc->low_wm_percent_set && !wc->cleaner) in writecache_status()
2476 if (wc->max_writeback_jobs_set) in writecache_status()
2478 if (wc->autocommit_blocks_set) in writecache_status()
2480 if (wc->autocommit_time_set) in writecache_status()
2482 if (wc->max_age != MAX_AGE_UNSPECIFIED) in writecache_status()
2484 if (wc->cleaner) in writecache_status()
2486 if (wc->writeback_fua_set) in writecache_status()
2490 if (wc->start_sector) in writecache_status()
2491 DMEMIT(" start_sector %llu", (unsigned long long)wc->start_sector); in writecache_status()
2492 if (wc->high_wm_percent_set && !wc->cleaner) { in writecache_status()
2493 x = (uint64_t)wc->freelist_high_watermark * 100; in writecache_status()
2494 x += wc->n_blocks / 2; in writecache_status()
2495 do_div(x, (size_t)wc->n_blocks); in writecache_status()
2498 if (wc->low_wm_percent_set && !wc->cleaner) { in writecache_status()
2499 x = (uint64_t)wc->freelist_low_watermark * 100; in writecache_status()
2500 x += wc->n_blocks / 2; in writecache_status()
2501 do_div(x, (size_t)wc->n_blocks); in writecache_status()
2504 if (wc->max_writeback_jobs_set) in writecache_status()
2505 DMEMIT(" writeback_jobs %u", wc->max_writeback_jobs); in writecache_status()
2506 if (wc->autocommit_blocks_set) in writecache_status()
2507 DMEMIT(" autocommit_blocks %u", wc->autocommit_blocks); in writecache_status()
2508 if (wc->autocommit_time_set) in writecache_status()
2509 DMEMIT(" autocommit_time %u", jiffies_to_msecs(wc->autocommit_jiffies)); in writecache_status()
2510 if (wc->max_age != MAX_AGE_UNSPECIFIED) in writecache_status()
2511 DMEMIT(" max_age %u", jiffies_to_msecs(wc->max_age)); in writecache_status()
2512 if (wc->cleaner) in writecache_status()
2514 if (wc->writeback_fua_set) in writecache_status()
2515 DMEMIT(" %sfua", wc->writeback_fua ? "" : "no"); in writecache_status()