Lines Matching refs:cmd
273 static inline int superblock_read_lock(struct dm_clone_metadata *cmd,
276 return dm_bm_read_lock(cmd->bm, SUPERBLOCK_LOCATION, &sb_validator, sblock);
279 static inline int superblock_write_lock_zero(struct dm_clone_metadata *cmd,
282 return dm_bm_write_lock_zero(cmd->bm, SUPERBLOCK_LOCATION, &sb_validator, sblock);
285 static int __copy_sm_root(struct dm_clone_metadata *cmd)
290 r = dm_sm_root_size(cmd->sm, &root_size);
294 return dm_sm_copy_root(cmd->sm, &cmd->metadata_space_map_root, root_size);
298 static void __prepare_superblock(struct dm_clone_metadata *cmd,
310 memcpy(&sb->metadata_space_map_root, &cmd->metadata_space_map_root,
311 sizeof(cmd->metadata_space_map_root));
313 sb->region_size = cpu_to_le64(cmd->region_size);
314 sb->target_size = cpu_to_le64(cmd->target_size);
315 sb->bitset_root = cpu_to_le64(cmd->bitset_root);
318 static int __open_metadata(struct dm_clone_metadata *cmd)
324 r = superblock_read_lock(cmd, &sblock);
334 if (cmd->region_size != le64_to_cpu(sb->region_size) ||
335 cmd->target_size != le64_to_cpu(sb->target_size)) {
341 r = dm_tm_open_with_sm(cmd->bm, SUPERBLOCK_LOCATION,
344 &cmd->tm, &cmd->sm);
351 dm_disk_bitset_init(cmd->tm, &cmd->bitset_info);
352 cmd->bitset_root = le64_to_cpu(sb->bitset_root);
360 static int __format_metadata(struct dm_clone_metadata *cmd)
366 r = dm_tm_create_with_sm(cmd->bm, SUPERBLOCK_LOCATION, &cmd->tm, &cmd->sm);
372 dm_disk_bitset_init(cmd->tm, &cmd->bitset_info);
374 r = dm_bitset_empty(&cmd->bitset_info, &cmd->bitset_root);
380 r = dm_bitset_resize(&cmd->bitset_info, cmd->bitset_root, 0,
381 cmd->nr_regions, false, &cmd->bitset_root);
383 DMERR("Failed to resize on-disk bitset to %lu entries", cmd->nr_regions);
388 r = dm_tm_pre_commit(cmd->tm);
394 r = __copy_sm_root(cmd);
400 r = superblock_write_lock_zero(cmd, &sblock);
407 __prepare_superblock(cmd, sb);
408 r = dm_tm_commit(cmd->tm, sblock);
417 dm_sm_destroy(cmd->sm);
418 dm_tm_destroy(cmd->tm);
423 static int __open_or_format_metadata(struct dm_clone_metadata *cmd, bool may_format_device)
428 r = __superblock_all_zeroes(cmd->bm, &formatted);
433 return may_format_device ? __format_metadata(cmd) : -EPERM;
435 return __open_metadata(cmd);
438 static int __create_persistent_data_structures(struct dm_clone_metadata *cmd,
444 cmd->bm = dm_block_manager_create(cmd->bdev,
447 if (IS_ERR(cmd->bm)) {
449 return PTR_ERR(cmd->bm);
452 r = __open_or_format_metadata(cmd, may_format_device);
454 dm_block_manager_destroy(cmd->bm);
459 static void __destroy_persistent_data_structures(struct dm_clone_metadata *cmd)
461 dm_sm_destroy(cmd->sm);
462 dm_tm_destroy(cmd->tm);
463 dm_block_manager_destroy(cmd->bm);
497 static int dirty_map_init(struct dm_clone_metadata *cmd)
499 if (__dirty_map_init(&cmd->dmap[0], cmd->nr_words, cmd->nr_regions)) {
504 if (__dirty_map_init(&cmd->dmap[1], cmd->nr_words, cmd->nr_regions)) {
506 __dirty_map_exit(&cmd->dmap[0]);
510 cmd->current_dmap = &cmd->dmap[0];
511 cmd->committing_dmap = NULL;
516 static void dirty_map_exit(struct dm_clone_metadata *cmd)
518 __dirty_map_exit(&cmd->dmap[0]);
519 __dirty_map_exit(&cmd->dmap[1]);
522 static int __load_bitset_in_core(struct dm_clone_metadata *cmd)
529 r = dm_bitset_flush(&cmd->bitset_info, cmd->bitset_root, &cmd->bitset_root);
533 r = dm_bitset_cursor_begin(&cmd->bitset_info, cmd->bitset_root, cmd->nr_regions, &c);
539 __set_bit(i, cmd->region_map);
541 __clear_bit(i, cmd->region_map);
543 if (i >= (cmd->nr_regions - 1))
562 struct dm_clone_metadata *cmd;
564 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
565 if (!cmd) {
570 cmd->bdev = bdev;
571 cmd->target_size = target_size;
572 cmd->region_size = region_size;
573 cmd->nr_regions = dm_sector_div_up(cmd->target_size, cmd->region_size);
574 cmd->nr_words = BITS_TO_LONGS(cmd->nr_regions);
576 init_rwsem(&cmd->lock);
577 spin_lock_init(&cmd->bitmap_lock);
578 cmd->read_only = 0;
579 cmd->fail_io = false;
580 cmd->hydration_done = false;
582 cmd->region_map = kvmalloc(bitmap_size(cmd->nr_regions), GFP_KERNEL);
583 if (!cmd->region_map) {
589 r = __create_persistent_data_structures(cmd, true);
593 r = __load_bitset_in_core(cmd);
599 r = dirty_map_init(cmd);
603 if (bitmap_full(cmd->region_map, cmd->nr_regions))
604 cmd->hydration_done = true;
606 return cmd;
609 __destroy_persistent_data_structures(cmd);
612 kvfree(cmd->region_map);
615 kfree(cmd);
620 void dm_clone_metadata_close(struct dm_clone_metadata *cmd)
622 if (!cmd->fail_io)
623 __destroy_persistent_data_structures(cmd);
625 dirty_map_exit(cmd);
626 kvfree(cmd->region_map);
627 kfree(cmd);
630 bool dm_clone_is_hydration_done(struct dm_clone_metadata *cmd)
632 return cmd->hydration_done;
635 bool dm_clone_is_region_hydrated(struct dm_clone_metadata *cmd, unsigned long region_nr)
637 return dm_clone_is_hydration_done(cmd) || test_bit(region_nr, cmd->region_map);
640 bool dm_clone_is_range_hydrated(struct dm_clone_metadata *cmd,
645 if (dm_clone_is_hydration_done(cmd))
648 bit = find_next_zero_bit(cmd->region_map, cmd->nr_regions, start);
653 unsigned int dm_clone_nr_of_hydrated_regions(struct dm_clone_metadata *cmd)
655 return bitmap_weight(cmd->region_map, cmd->nr_regions);
658 unsigned long dm_clone_find_next_unhydrated_region(struct dm_clone_metadata *cmd,
661 return find_next_zero_bit(cmd->region_map, cmd->nr_regions, start);
664 static int __update_metadata_word(struct dm_clone_metadata *cmd,
670 unsigned long max_index = min(cmd->nr_regions, (word + 1) * BITS_PER_LONG);
674 r = dm_bitset_set_bit(&cmd->bitset_info, cmd->bitset_root,
675 index, &cmd->bitset_root);
688 static int __metadata_commit(struct dm_clone_metadata *cmd)
695 r = dm_bitset_flush(&cmd->bitset_info, cmd->bitset_root, &cmd->bitset_root);
702 r = dm_tm_pre_commit(cmd->tm);
708 /* Save the space map root in cmd->metadata_space_map_root */
709 r = __copy_sm_root(cmd);
716 r = superblock_write_lock_zero(cmd, &sblock);
724 __prepare_superblock(cmd, sb);
727 r = dm_tm_commit(cmd->tm, sblock);
736 if (bitmap_full(cmd->region_map, cmd->nr_regions))
737 cmd->hydration_done = true;
742 static int __flush_dmap(struct dm_clone_metadata *cmd, struct dirty_map *dmap)
749 word = find_next_bit(dmap->dirty_words, cmd->nr_words, word);
751 if (word == cmd->nr_words)
754 r = __update_metadata_word(cmd, dmap->dirty_regions, word);
761 } while (word < cmd->nr_words);
763 r = __metadata_commit(cmd);
769 spin_lock_irq(&cmd->bitmap_lock);
771 spin_unlock_irq(&cmd->bitmap_lock);
776 int dm_clone_metadata_pre_commit(struct dm_clone_metadata *cmd)
781 down_write(&cmd->lock);
783 if (cmd->fail_io || dm_bm_is_read_only(cmd->bm)) {
789 dmap = cmd->current_dmap;
792 next_dmap = (dmap == &cmd->dmap[0]) ? &cmd->dmap[1] : &cmd->dmap[0];
798 if (WARN_ON(next_dmap->changed || cmd->committing_dmap)) {
804 spin_lock_irq(&cmd->bitmap_lock);
805 cmd->current_dmap = next_dmap;
806 spin_unlock_irq(&cmd->bitmap_lock);
809 cmd->committing_dmap = dmap;
811 up_write(&cmd->lock);
816 int dm_clone_metadata_commit(struct dm_clone_metadata *cmd)
820 down_write(&cmd->lock);
822 if (cmd->fail_io || dm_bm_is_read_only(cmd->bm))
825 if (WARN_ON(!cmd->committing_dmap)) {
830 r = __flush_dmap(cmd, cmd->committing_dmap);
833 cmd->committing_dmap = NULL;
836 up_write(&cmd->lock);
841 int dm_clone_set_region_hydrated(struct dm_clone_metadata *cmd, unsigned long region_nr)
847 if (unlikely(region_nr >= cmd->nr_regions)) {
849 region_nr, cmd->nr_regions);
855 spin_lock_irqsave(&cmd->bitmap_lock, flags);
857 if (cmd->read_only) {
862 dmap = cmd->current_dmap;
866 __set_bit(region_nr, cmd->region_map);
870 spin_unlock_irqrestore(&cmd->bitmap_lock, flags);
875 int dm_clone_cond_set_range(struct dm_clone_metadata *cmd, unsigned long start,
882 if (unlikely(start >= cmd->nr_regions || (start + nr_regions) < start ||
883 (start + nr_regions) > cmd->nr_regions)) {
885 start, nr_regions, cmd->nr_regions);
889 spin_lock_irq(&cmd->bitmap_lock);
891 if (cmd->read_only) {
896 dmap = cmd->current_dmap;
898 if (!test_bit(region_nr, cmd->region_map)) {
902 __set_bit(region_nr, cmd->region_map);
907 spin_unlock_irq(&cmd->bitmap_lock);
915 * cmd->region_map without taking the cmd->bitmap_lock spinlock. The only
922 int dm_clone_reload_in_core_bitset(struct dm_clone_metadata *cmd)
926 down_write(&cmd->lock);
928 if (cmd->fail_io)
931 r = __load_bitset_in_core(cmd);
933 up_write(&cmd->lock);
938 bool dm_clone_changed_this_transaction(struct dm_clone_metadata *cmd)
943 spin_lock_irqsave(&cmd->bitmap_lock, flags);
944 r = cmd->dmap[0].changed || cmd->dmap[1].changed;
945 spin_unlock_irqrestore(&cmd->bitmap_lock, flags);
950 int dm_clone_metadata_abort(struct dm_clone_metadata *cmd)
954 down_write(&cmd->lock);
956 if (cmd->fail_io || dm_bm_is_read_only(cmd->bm))
959 __destroy_persistent_data_structures(cmd);
961 r = __create_persistent_data_structures(cmd, false);
964 cmd->fail_io = true;
967 up_write(&cmd->lock);
972 void dm_clone_metadata_set_read_only(struct dm_clone_metadata *cmd)
974 down_write(&cmd->lock);
976 spin_lock_irq(&cmd->bitmap_lock);
977 cmd->read_only = 1;
978 spin_unlock_irq(&cmd->bitmap_lock);
980 if (!cmd->fail_io)
981 dm_bm_set_read_only(cmd->bm);
983 up_write(&cmd->lock);
986 void dm_clone_metadata_set_read_write(struct dm_clone_metadata *cmd)
988 down_write(&cmd->lock);
990 spin_lock_irq(&cmd->bitmap_lock);
991 cmd->read_only = 0;
992 spin_unlock_irq(&cmd->bitmap_lock);
994 if (!cmd->fail_io)
995 dm_bm_set_read_write(cmd->bm);
997 up_write(&cmd->lock);
1000 int dm_clone_get_free_metadata_block_count(struct dm_clone_metadata *cmd,
1005 down_read(&cmd->lock);
1007 if (!cmd->fail_io)
1008 r = dm_sm_get_nr_free(cmd->sm, result);
1010 up_read(&cmd->lock);
1015 int dm_clone_get_metadata_dev_size(struct dm_clone_metadata *cmd,
1020 down_read(&cmd->lock);
1022 if (!cmd->fail_io)
1023 r = dm_sm_get_nr_blocks(cmd->sm, result);
1025 up_read(&cmd->lock);