1784 	struct extent_map *em;  in find_next_chunk()  local
1792 		em = rb_entry(n, struct extent_map, rb_node);  in find_next_chunk()
1793 		ret = em->start + em->len;  in find_next_chunk()
2952 	struct extent_map *em;  in btrfs_get_chunk_map()  local
2956 	em = lookup_extent_mapping(em_tree, logical, length);  in btrfs_get_chunk_map()
2959 	if (!em) {  in btrfs_get_chunk_map()
2965 	if (em->start > logical || em->start + em->len < logical) {  in btrfs_get_chunk_map()
2968 			   logical, length, em->start, em->start + em->len);  in btrfs_get_chunk_map()
2969 		free_extent_map(em);  in btrfs_get_chunk_map()
2974 	return em;  in btrfs_get_chunk_map()
2980 	struct extent_map *em;  in btrfs_remove_chunk()  local
2986 	em = btrfs_get_chunk_map(fs_info, chunk_offset, 1);  in btrfs_remove_chunk()
2987 	if (IS_ERR(em)) {  in btrfs_remove_chunk()
2994 		return PTR_ERR(em);  in btrfs_remove_chunk()
2996 	map = em->map_lookup;  in btrfs_remove_chunk()
3042 	trace_btrfs_chunk_free(fs_info, map, chunk_offset, em->len);  in btrfs_remove_chunk()
3052 	ret = btrfs_remove_block_group(trans, chunk_offset, em);  in btrfs_remove_chunk()
3060 	free_extent_map(em);  in btrfs_remove_chunk()
5122 	struct extent_map *em;  in create_chunk()  local
5150 	em = alloc_extent_map();  in create_chunk()
5151 	if (!em) {  in create_chunk()
5155 	set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);  in create_chunk()
5156 	em->map_lookup = map;  in create_chunk()
5157 	em->start = start;  in create_chunk()
5158 	em->len = ctl->chunk_size;  in create_chunk()
5159 	em->block_start = 0;  in create_chunk()
5160 	em->block_len = em->len;  in create_chunk()
5161 	em->orig_block_len = ctl->stripe_size;  in create_chunk()
5165 	ret = add_extent_mapping(em_tree, em, 0);  in create_chunk()
5168 		free_extent_map(em);  in create_chunk()
5190 	free_extent_map(em);  in create_chunk()
5198 	remove_extent_mapping(em_tree, em);  in create_chunk()
5202 	free_extent_map(em);  in create_chunk()
5204 	free_extent_map(em);  in create_chunk()
5277 	struct extent_map *em;  in btrfs_finish_chunk_alloc()  local
5285 	em = btrfs_get_chunk_map(fs_info, chunk_offset, chunk_size);  in btrfs_finish_chunk_alloc()
5286 	if (IS_ERR(em))  in btrfs_finish_chunk_alloc()
5287 		return PTR_ERR(em);  in btrfs_finish_chunk_alloc()
5289 	map = em->map_lookup;  in btrfs_finish_chunk_alloc()
5291 	stripe_size = em->orig_block_len;  in btrfs_finish_chunk_alloc()
5361 	free_extent_map(em);  in btrfs_finish_chunk_alloc()
5390 	struct extent_map *em;  in btrfs_chunk_readonly()  local
5396 	em = btrfs_get_chunk_map(fs_info, chunk_offset, 1);  in btrfs_chunk_readonly()
5397 	if (IS_ERR(em))  in btrfs_chunk_readonly()
5400 	map = em->map_lookup;  in btrfs_chunk_readonly()
5422 	free_extent_map(em);  in btrfs_chunk_readonly()
5428 	struct extent_map *em;  in btrfs_mapping_tree_free()  local
5432 		em = lookup_extent_mapping(tree, 0, (u64)-1);  in btrfs_mapping_tree_free()
5433 		if (em)  in btrfs_mapping_tree_free()
5434 			remove_extent_mapping(tree, em);  in btrfs_mapping_tree_free()
5436 		if (!em)  in btrfs_mapping_tree_free()
5439 		free_extent_map(em);  in btrfs_mapping_tree_free()
5441 		free_extent_map(em);  in btrfs_mapping_tree_free()
5447 	struct extent_map *em;  in btrfs_num_copies()  local
5451 	em = btrfs_get_chunk_map(fs_info, logical, len);  in btrfs_num_copies()
5452 	if (IS_ERR(em))  in btrfs_num_copies()
5461 	map = em->map_lookup;  in btrfs_num_copies()
5479 	free_extent_map(em);  in btrfs_num_copies()
5493 	struct extent_map *em;  in btrfs_full_stripe_len()  local
5497 	em = btrfs_get_chunk_map(fs_info, logical, len);  in btrfs_full_stripe_len()
5499 	if (!WARN_ON(IS_ERR(em))) {  in btrfs_full_stripe_len()
5500 		map = em->map_lookup;  in btrfs_full_stripe_len()
5503 		free_extent_map(em);  in btrfs_full_stripe_len()
5510 	struct extent_map *em;  in btrfs_is_parity_mirror()  local
5514 	em = btrfs_get_chunk_map(fs_info, logical, len);  in btrfs_is_parity_mirror()
5516 	if(!WARN_ON(IS_ERR(em))) {  in btrfs_is_parity_mirror()
5517 		map = em->map_lookup;  in btrfs_is_parity_mirror()
5520 		free_extent_map(em);  in btrfs_is_parity_mirror()
5641 	struct extent_map *em;  in __btrfs_map_block_for_discard()  local
5665 	em = btrfs_get_chunk_map(fs_info, logical, length);  in __btrfs_map_block_for_discard()
5666 	if (IS_ERR(em))  in __btrfs_map_block_for_discard()
5667 		return PTR_ERR(em);  in __btrfs_map_block_for_discard()
5669 	map = em->map_lookup;  in __btrfs_map_block_for_discard()
5676 	offset = logical - em->start;  in __btrfs_map_block_for_discard()
5677 	length = min_t(u64, em->start + em->len - logical, length);  in __btrfs_map_block_for_discard()
5782 	free_extent_map(em);  in __btrfs_map_block_for_discard()
5979 	struct extent_map *em;  in btrfs_get_io_geometry()  local
5991 	em = btrfs_get_chunk_map(fs_info, logical, len);  in btrfs_get_io_geometry()
5992 	if (IS_ERR(em))  in btrfs_get_io_geometry()
5993 		return PTR_ERR(em);  in btrfs_get_io_geometry()
5995 	map = em->map_lookup;  in btrfs_get_io_geometry()
5997 	offset = logical - em->start;  in btrfs_get_io_geometry()
6007 			stripe_offset, offset, em->start, logical, stripe_len);  in btrfs_get_io_geometry()
6044 		len = min_t(u64, em->len - offset, max_len);  in btrfs_get_io_geometry()
6046 		len = em->len - offset;  in btrfs_get_io_geometry()
6058 	free_extent_map(em);  in btrfs_get_io_geometry()
6068 	struct extent_map *em;  in __btrfs_map_block()  local
6096 	em = btrfs_get_chunk_map(fs_info, logical, *length);  in __btrfs_map_block()
6097 	ASSERT(!IS_ERR(em));  in __btrfs_map_block()
6098 	map = em->map_lookup;  in __btrfs_map_block()
6258 				em->start + (tmp + i) * map->stripe_len;  in __btrfs_map_block()
6300 	free_extent_map(em);  in __btrfs_map_block()
6650 	struct extent_map *em;  in read_one_chunk()  local
6674 	em = lookup_extent_mapping(map_tree, logical, 1);  in read_one_chunk()
6678 	if (em && em->start <= logical && em->start + em->len > logical) {  in read_one_chunk()
6679 		free_extent_map(em);  in read_one_chunk()
6681 	} else if (em) {  in read_one_chunk()
6682 		free_extent_map(em);  in read_one_chunk()
6685 	em = alloc_extent_map();  in read_one_chunk()
6686 	if (!em)  in read_one_chunk()
6690 		free_extent_map(em);  in read_one_chunk()
6694 	set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);  in read_one_chunk()
6695 	em->map_lookup = map;  in read_one_chunk()
6696 	em->start = logical;  in read_one_chunk()
6697 	em->len = length;  in read_one_chunk()
6698 	em->orig_start = 0;  in read_one_chunk()
6699 	em->block_start = 0;  in read_one_chunk()
6700 	em->block_len = em->len;  in read_one_chunk()
6709 	em->orig_block_len = calc_stripe_length(map->type, em->len,  in read_one_chunk()
6722 			free_extent_map(em);  in read_one_chunk()
6731 				free_extent_map(em);  in read_one_chunk()
6745 	ret = add_extent_mapping(map_tree, em, 0);  in read_one_chunk()
6750 			  em->start, em->len, ret);  in read_one_chunk()
6752 	free_extent_map(em);  in read_one_chunk()
7065 	struct extent_map *em;  in btrfs_check_rw_degradable()  local
7070 	em = lookup_extent_mapping(map_tree, 0, (u64)-1);  in btrfs_check_rw_degradable()
7073 	if (!em) {  in btrfs_check_rw_degradable()
7077 	while (em) {  in btrfs_check_rw_degradable()
7083 		map = em->map_lookup;  in btrfs_check_rw_degradable()
7101 				   em->start, missing, max_tolerated);  in btrfs_check_rw_degradable()
7102 			free_extent_map(em);  in btrfs_check_rw_degradable()
7106 		next_start = extent_map_end(em);  in btrfs_check_rw_degradable()
7107 		free_extent_map(em);  in btrfs_check_rw_degradable()
7110 		em = lookup_extent_mapping(map_tree, next_start,  in btrfs_check_rw_degradable()
7593 	struct extent_map *em;  in verify_one_dev_extent()  local
7602 	em = lookup_extent_mapping(em_tree, chunk_offset, 1);  in verify_one_dev_extent()
7605 	if (!em) {  in verify_one_dev_extent()
7613 	map = em->map_lookup;  in verify_one_dev_extent()
7614 	stripe_len = calc_stripe_length(map->type, em->len, map->num_stripes);  in verify_one_dev_extent()
7618 			  physical_offset, devid, em->start, physical_len,  in verify_one_dev_extent()
7631 					  em->start);  in verify_one_dev_extent()
7678 	free_extent_map(em);  in verify_one_dev_extent()
7685 	struct extent_map *em;  in verify_chunk_dev_extent_mapping()  local
7691 		em = rb_entry(node, struct extent_map, rb_node);  in verify_chunk_dev_extent_mapping()
7692 		if (em->map_lookup->num_stripes !=  in verify_chunk_dev_extent_mapping()
7693 		    em->map_lookup->verified_stripes) {  in verify_chunk_dev_extent_mapping()
7696 				  em->start, em->map_lookup->verified_stripes,  in verify_chunk_dev_extent_mapping()
7697 				  em->map_lookup->num_stripes);  in verify_chunk_dev_extent_mapping()