431 	struct dm_bio_prison_cell *r = NULL;  in prealloc_get_cell()  local
434 		r = p->cell1;  in prealloc_get_cell()
438 		r = p->cell2;  in prealloc_get_cell()
443 	return r;  in prealloc_get_cell()
484 	int r;  in bio_detain_range()  local
488 	r = dm_bio_detain(cache->prison, &key, bio, cell_prealloc, cell_result);  in bio_detain_range()
489 	if (r)  in bio_detain_range()
492 	return r;  in bio_detain_range()
510 	int r;  in get_cell()  local
517 	r = dm_get_cell(cache->prison, &key, cell_prealloc, cell_result);  in get_cell()
518 	if (r)  in get_cell()
521 	return r;  in get_cell()
612 	int r;  in is_discarded()  local
616 	r = test_bit(from_dblock(b), cache->discard_bitset);  in is_discarded()
619 	return r;  in is_discarded()
624 	int r;  in is_discarded_oblock()  local
628 	r = test_bit(from_dblock(oblock_to_dblock(cache, b)),  in is_discarded_oblock()
632 	return r;  in is_discarded_oblock()
1040 	int r;  in issue_copy()  local
1055 		r = dm_kcopyd_copy(cache->copier, &c_region, 1, &o_region, 0, copy_complete, mg);  in issue_copy()
1059 		r = dm_kcopyd_copy(cache->copier, &o_region, 1, &c_region, 0, copy_complete, mg);  in issue_copy()
1062 	if (r < 0) {  in issue_copy()
1409 	int r;  in process_discard_bio()  local
1420 …r = bio_detain_range(cache, dblock_to_oblock(cache, b), dblock_to_oblock(cache, e), bio, cell_prea…  in process_discard_bio()
1423 	if (r > 0)  in process_discard_bio()
1477 	int r;  in process_bio()  local
1490 	r = bio_detain(cache, block, bio, cell_prealloc,  in process_bio()
1493 	if (r > 0)  in process_bio()
1503 	r = policy_map(cache->policy, block, true, can_migrate, discarded_block,  in process_bio()
1506 	if (r == -EWOULDBLOCK)  in process_bio()
1587 	int r = 0;  in commit_if_needed()  local
1593 		r = dm_cache_commit(cache->cmd, false);  in commit_if_needed()
1597 	return r;  in commit_if_needed()
1683 	int r = 0;  in writeback_some_dirty_blocks()  local
1695 		r = policy_writeback_work(cache->policy, &oblock, &cblock);  in writeback_some_dirty_blocks()
1696 		if (r)  in writeback_some_dirty_blocks()
1699 		r = get_cell(cache, oblock, &structs, &old_ocell);  in writeback_some_dirty_blocks()
1700 		if (r) {  in writeback_some_dirty_blocks()
1718 	int r = 0;  in process_invalidation_request()  local
1723 		r = policy_remove_cblock(cache->policy, to_cblock(begin));  in process_invalidation_request()
1724 		if (!r) {  in process_invalidation_request()
1725 			r = dm_cache_remove_mapping(cache->cmd, to_cblock(begin));  in process_invalidation_request()
1726 			if (r)  in process_invalidation_request()
1729 		} else if (r == -ENODATA) {  in process_invalidation_request()
1731 			r = 0;  in process_invalidation_request()
1743 	req->err = r;  in process_invalidation_request()
2043 	int r;  in parse_metadata_dev()  local
2050 	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,  in parse_metadata_dev()
2052 	if (r) {  in parse_metadata_dev()
2054 		return r;  in parse_metadata_dev()
2068 	int r;  in parse_cache_dev()  local
2073 	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,  in parse_cache_dev()
2075 	if (r) {  in parse_cache_dev()
2077 		return r;  in parse_cache_dev()
2087 	int r;  in parse_origin_dev()  local
2092 	r = dm_get_device(ca->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE,  in parse_origin_dev()
2094 	if (r) {  in parse_origin_dev()
2096 		return r;  in parse_origin_dev()
2147 	int r;  in parse_features()  local
2154 	r = dm_read_arg_group(_args, as, &argc, error);  in parse_features()
2155 	if (r)  in parse_features()
2186 	int r;  in parse_policy()  local
2193 	r = dm_read_arg_group(_args, as, &ca->policy_argc, error);  in parse_policy()
2194 	if (r)  in parse_policy()
2206 	int r;  in parse_cache_args()  local
2212 	r = parse_metadata_dev(ca, &as, error);  in parse_cache_args()
2213 	if (r)  in parse_cache_args()
2214 		return r;  in parse_cache_args()
2216 	r = parse_cache_dev(ca, &as, error);  in parse_cache_args()
2217 	if (r)  in parse_cache_args()
2218 		return r;  in parse_cache_args()
2220 	r = parse_origin_dev(ca, &as, error);  in parse_cache_args()
2221 	if (r)  in parse_cache_args()
2222 		return r;  in parse_cache_args()
2224 	r = parse_block_size(ca, &as, error);  in parse_cache_args()
2225 	if (r)  in parse_cache_args()
2226 		return r;  in parse_cache_args()
2228 	r = parse_features(ca, &as, error);  in parse_cache_args()
2229 	if (r)  in parse_cache_args()
2230 		return r;  in parse_cache_args()
2232 	r = parse_policy(ca, &as, error);  in parse_cache_args()
2233 	if (r)  in parse_cache_args()
2234 		return r;  in parse_cache_args()
2262 	int r = process_config_option(cache, key, value);  in set_config_value()  local
2264 	if (r == NOT_CORE_OPTION)  in set_config_value()
2265 		r = policy_set_config_value(cache->policy, key, value);  in set_config_value()
2267 	if (r)  in set_config_value()
2270 	return r;  in set_config_value()
2275 	int r = 0;  in set_config_values()  local
2283 		r = set_config_value(cache, argv[0], argv[1]);  in set_config_values()
2284 		if (r)  in set_config_values()
2291 	return r;  in set_config_values()
2353 	int r = 0;  in cache_create()  local
2394 		r = -EINVAL;  in cache_create()
2409 	r = create_cache_policy(cache, ca, error);  in cache_create()
2410 	if (r)  in cache_create()
2416 	r = set_config_values(cache, ca->policy_argc, ca->policy_argv);  in cache_create()
2417 	if (r) {  in cache_create()
2427 		r = PTR_ERR(cmd);  in cache_create()
2435 		r = dm_cache_metadata_all_clean(cache->cmd, &all_clean);  in cache_create()
2436 		if (r) {  in cache_create()
2443 			r = -EINVAL;  in cache_create()
2463 	r = -ENOMEM;  in cache_create()
2487 		r = PTR_ERR(cache->copier);  in cache_create()
2543 	return r;  in cache_create()
2572 	int r = -EINVAL;  in cache_ctr()  local
2583 	r = parse_cache_args(ca, argc, argv, &ti->error);  in cache_ctr()
2584 	if (r)  in cache_ctr()
2587 	r = cache_create(ca, &cache);  in cache_ctr()
2588 	if (r)  in cache_ctr()
2591 	r = copy_ctr_args(cache, argc - 3, (const char **)argv + 3);  in cache_ctr()
2592 	if (r) {  in cache_ctr()
2601 	return r;  in cache_ctr()
2606 	int r;  in __cache_map()  local
2641 	r = bio_detain(cache, block, bio, *cell,  in __cache_map()
2644 	if (r) {  in __cache_map()
2645 		if (r < 0)  in __cache_map()
2653 	r = policy_map(cache->policy, block, false, can_migrate, discarded_block,  in __cache_map()
2655 	if (r == -EWOULDBLOCK) {  in __cache_map()
2659 	} else if (r) {  in __cache_map()
2660 		DMERR_LIMIT("Unexpected return from cache replacement policy: %d", r);  in __cache_map()
2666 	r = DM_MAPIO_REMAPPED;  in __cache_map()
2676 				r = DM_MAPIO_SUBMITTED;  in __cache_map()
2702 			r = DM_MAPIO_SUBMITTED;  in __cache_map()
2714 		r = DM_MAPIO_SUBMITTED;  in __cache_map()
2717 	return r;  in __cache_map()
2722 	int r;  in cache_map()  local
2726 	r = __cache_map(cache, bio, &cell);  in cache_map()
2727 	if (r == DM_MAPIO_REMAPPED && cell) {  in cache_map()
2732 	return r;  in cache_map()
2757 	unsigned i, r;  in write_dirty_bitset()  local
2760 		r = dm_cache_set_dirty(cache->cmd, to_cblock(i),  in write_dirty_bitset()
2762 		if (r)  in write_dirty_bitset()
2763 			return r;  in write_dirty_bitset()
2771 	unsigned i, r;  in write_discard_bitset()  local
2773 	r = dm_cache_discard_bitset_resize(cache->cmd, cache->discard_block_size,  in write_discard_bitset()
2775 	if (r) {  in write_discard_bitset()
2777 		return r;  in write_discard_bitset()
2781 		r = dm_cache_set_discard(cache->cmd, to_dblock(i),  in write_discard_bitset()
2783 		if (r)  in write_discard_bitset()
2784 			return r;  in write_discard_bitset()
2839 	int r;  in load_mapping()  local
2842 	r = policy_load_mapping(cache->policy, oblock, cblock, hint, hint_valid);  in load_mapping()
2843 	if (r)  in load_mapping()
2844 		return r;  in load_mapping()
2967 	int r;  in resize_cache_dev()  local
2969 	r = dm_cache_resize(cache->cmd, new_size);  in resize_cache_dev()
2970 	if (r) {  in resize_cache_dev()
2972 		return r;  in resize_cache_dev()
2982 	int r = 0;  in cache_preresume()  local
2990 		r = resize_cache_dev(cache, csize);  in cache_preresume()
2991 		if (r)  in cache_preresume()
2992 			return r;  in cache_preresume()
3000 		r = resize_cache_dev(cache, csize);  in cache_preresume()
3001 		if (r)  in cache_preresume()
3002 			return r;  in cache_preresume()
3006 		r = dm_cache_load_mappings(cache->cmd, cache->policy,  in cache_preresume()
3008 		if (r) {  in cache_preresume()
3010 			return r;  in cache_preresume()
3027 		r = dm_cache_load_discards(cache->cmd, load_discard, &li);  in cache_preresume()
3028 		if (r) {  in cache_preresume()
3030 			return r;  in cache_preresume()
3037 	return r;  in cache_preresume()
3062 	int r = 0;  in cache_status()  local
3075 			r = dm_cache_commit(cache->cmd, false);  in cache_status()
3076 			if (r)  in cache_status()
3080 		r = dm_cache_get_free_metadata_block_count(cache->cmd,  in cache_status()
3082 		if (r) {  in cache_status()
3087 		r = dm_cache_get_metadata_dev_size(cache->cmd, &nr_blocks_metadata);  in cache_status()
3088 		if (r) {  in cache_status()
3128 			r = policy_emit_config_values(cache->policy, result + sz, maxlen - sz);  in cache_status()
3129 			if (r)  in cache_status()
3130 				DMERR("policy_emit_config_values returned %d", r);  in cache_status()
3166 	int r;  in parse_cblock_range()  local
3171 	r = sscanf(str, "%llu-%llu%c", &b, &e, &dummy);  in parse_cblock_range()
3172 	if (r < 0)  in parse_cblock_range()
3173 		return r;  in parse_cblock_range()
3175 	if (r == 2) {  in parse_cblock_range()
3184 	r = sscanf(str, "%llu%c", &b, &dummy);  in parse_cblock_range()
3185 	if (r < 0)  in parse_cblock_range()
3186 		return r;  in parse_cblock_range()
3188 	if (r == 1) {  in parse_cblock_range()
3244 	int r = 0;  in process_invalidate_cblocks_message()  local
3254 		r = parse_cblock_range(cache, cblock_ranges[i], &range);  in process_invalidate_cblocks_message()
3255 		if (r)  in process_invalidate_cblocks_message()
3258 		r = validate_cblock_range(cache, &range);  in process_invalidate_cblocks_message()
3259 		if (r)  in process_invalidate_cblocks_message()
3265 		r = request_invalidation(cache, &range);  in process_invalidate_cblocks_message()
3266 		if (r)  in process_invalidate_cblocks_message()
3270 	return r;  in process_invalidate_cblocks_message()
3300 	int r = 0;  in cache_iterate_devices()  local
3303 	r = fn(ti, cache->cache_dev, 0, get_dev_size(cache->cache_dev), data);  in cache_iterate_devices()
3304 	if (!r)  in cache_iterate_devices()
3305 		r = fn(ti, cache->origin_dev, 0, ti->len, data);  in cache_iterate_devices()
3307 	return r;  in cache_iterate_devices()
3379 	int r;  in dm_cache_init()  local
3381 	r = dm_register_target(&cache_target);  in dm_cache_init()
3382 	if (r) {  in dm_cache_init()
3383 		DMERR("cache target registration failed: %d", r);  in dm_cache_init()
3384 		return r;  in dm_cache_init()