1161 	struct extent_map *em;  in submit_one_async_extent()  local
1212 	em = btrfs_create_io_em(inode, start, &file_extent, BTRFS_ORDERED_COMPRESSED);  in submit_one_async_extent()
1213 	if (IS_ERR(em)) {  in submit_one_async_extent()
1214 		ret = PTR_ERR(em);  in submit_one_async_extent()
1217 	free_extent_map(em);  in submit_one_async_extent()
1268 	struct extent_map *em;  in btrfs_get_extent_allocation_hint()  local
1272 	em = search_extent_mapping(em_tree, start, num_bytes);  in btrfs_get_extent_allocation_hint()
1273 	if (em) {  in btrfs_get_extent_allocation_hint()
1279 		if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {  in btrfs_get_extent_allocation_hint()
1280 			free_extent_map(em);  in btrfs_get_extent_allocation_hint()
1281 			em = search_extent_mapping(em_tree, 0, 0);  in btrfs_get_extent_allocation_hint()
1282 			if (em && em->disk_bytenr < EXTENT_MAP_LAST_BYTE)  in btrfs_get_extent_allocation_hint()
1283 				alloc_hint = extent_map_block_start(em);  in btrfs_get_extent_allocation_hint()
1284 			if (em)  in btrfs_get_extent_allocation_hint()
1285 				free_extent_map(em);  in btrfs_get_extent_allocation_hint()
1287 			alloc_hint = extent_map_block_start(em);  in btrfs_get_extent_allocation_hint()
1288 			free_extent_map(em);  in btrfs_get_extent_allocation_hint()
1339 	struct extent_map *em;  in cow_file_range()  local
1437 		em = btrfs_create_io_em(inode, start, &file_extent,  in cow_file_range()
1439 		if (IS_ERR(em)) {  in cow_file_range()
1442 			ret = PTR_ERR(em);  in cow_file_range()
1445 		free_extent_map(em);  in cow_file_range()
2158 			struct extent_map *em;  in run_delalloc_nocow()  local
2160 			em = btrfs_create_io_em(inode, cur_offset,  in run_delalloc_nocow()
2163 			if (IS_ERR(em)) {  in run_delalloc_nocow()
2167 				ret = PTR_ERR(em);  in run_delalloc_nocow()
2170 			free_extent_map(em);  in run_delalloc_nocow()
2626 		struct extent_map *em;  in btrfs_find_new_delalloc_bytes()  local
2630 		em = btrfs_get_extent(inode, NULL, search_start, search_len);  in btrfs_find_new_delalloc_bytes()
2631 		if (IS_ERR(em))  in btrfs_find_new_delalloc_bytes()
2632 			return PTR_ERR(em);  in btrfs_find_new_delalloc_bytes()
2634 		if (em->disk_bytenr != EXTENT_MAP_HOLE)  in btrfs_find_new_delalloc_bytes()
2637 		em_len = em->len;  in btrfs_find_new_delalloc_bytes()
2638 		if (em->start < search_start)  in btrfs_find_new_delalloc_bytes()
2639 			em_len -= search_start - em->start;  in btrfs_find_new_delalloc_bytes()
2647 		search_start = extent_map_end(em);  in btrfs_find_new_delalloc_bytes()
2648 		free_extent_map(em);  in btrfs_find_new_delalloc_bytes()
4935 	struct extent_map *em = NULL;  in btrfs_cont_expand()  local
4960 		em = btrfs_get_extent(inode, NULL, cur_offset, block_end - cur_offset);  in btrfs_cont_expand()
4961 		if (IS_ERR(em)) {  in btrfs_cont_expand()
4962 			ret = PTR_ERR(em);  in btrfs_cont_expand()
4963 			em = NULL;  in btrfs_cont_expand()
4966 		last_byte = min(extent_map_end(em), block_end);  in btrfs_cont_expand()
4970 		if (!(em->flags & EXTENT_FLAG_PREALLOC)) {  in btrfs_cont_expand()
5007 		free_extent_map(em);  in btrfs_cont_expand()
5008 		em = NULL;  in btrfs_cont_expand()
5013 	free_extent_map(em);  in btrfs_cont_expand()
6817 	struct extent_map *em = NULL;  in btrfs_get_extent()  local
6821 	em = lookup_extent_mapping(em_tree, start, len);  in btrfs_get_extent()
6824 	if (em) {  in btrfs_get_extent()
6825 		if (em->start > start || em->start + em->len <= start)  in btrfs_get_extent()
6826 			free_extent_map(em);  in btrfs_get_extent()
6827 		else if (em->disk_bytenr == EXTENT_MAP_INLINE && folio)  in btrfs_get_extent()
6828 			free_extent_map(em);  in btrfs_get_extent()
6832 	em = alloc_extent_map();  in btrfs_get_extent()
6833 	if (!em) {  in btrfs_get_extent()
6837 	em->start = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6838 	em->disk_bytenr = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6839 	em->len = (u64)-1;  in btrfs_get_extent()
6928 		em->start = start;  in btrfs_get_extent()
6929 		em->len = found_key.offset - start;  in btrfs_get_extent()
6930 		em->disk_bytenr = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6934 	btrfs_extent_item_to_extent_map(inode, path, item, em);  in btrfs_get_extent()
6946 		ASSERT(em->start == 0);  in btrfs_get_extent()
6954 		ASSERT(em->disk_bytenr == EXTENT_MAP_INLINE);  in btrfs_get_extent()
6955 		ASSERT(em->len == fs_info->sectorsize);  in btrfs_get_extent()
6963 	em->start = start;  in btrfs_get_extent()
6964 	em->len = len;  in btrfs_get_extent()
6965 	em->disk_bytenr = EXTENT_MAP_HOLE;  in btrfs_get_extent()
6969 	if (em->start > start || extent_map_end(em) <= start) {  in btrfs_get_extent()
6972 			  em->start, em->len, start, len);  in btrfs_get_extent()
6978 	ret = btrfs_add_extent_mapping(inode, &em, start, len);  in btrfs_get_extent()
6983 	trace_btrfs_get_extent(root, inode, em);  in btrfs_get_extent()
6986 		free_extent_map(em);  in btrfs_get_extent()
6989 	return em;  in btrfs_get_extent()
7127 	struct extent_map *em;  in btrfs_create_io_em()  local
7167 	em = alloc_extent_map();  in btrfs_create_io_em()
7168 	if (!em)  in btrfs_create_io_em()
7171 	em->start = start;  in btrfs_create_io_em()
7172 	em->len = file_extent->num_bytes;  in btrfs_create_io_em()
7173 	em->disk_bytenr = file_extent->disk_bytenr;  in btrfs_create_io_em()
7174 	em->disk_num_bytes = file_extent->disk_num_bytes;  in btrfs_create_io_em()
7175 	em->ram_bytes = file_extent->ram_bytes;  in btrfs_create_io_em()
7176 	em->generation = -1;  in btrfs_create_io_em()
7177 	em->offset = file_extent->offset;  in btrfs_create_io_em()
7178 	em->flags |= EXTENT_FLAG_PINNED;  in btrfs_create_io_em()
7180 		extent_map_set_compression(em, file_extent->compression);  in btrfs_create_io_em()
7182 	ret = btrfs_replace_extent_map_range(inode, em, true);  in btrfs_create_io_em()
7184 		free_extent_map(em);  in btrfs_create_io_em()
7189 	return em;  in btrfs_create_io_em()
8757 	struct extent_map *em;  in __btrfs_prealloc_file_range()  local
8812 		em = alloc_extent_map();  in __btrfs_prealloc_file_range()
8813 		if (!em) {  in __btrfs_prealloc_file_range()
8820 		em->start = cur_offset;  in __btrfs_prealloc_file_range()
8821 		em->len = ins.offset;  in __btrfs_prealloc_file_range()
8822 		em->disk_bytenr = ins.objectid;  in __btrfs_prealloc_file_range()
8823 		em->offset = 0;  in __btrfs_prealloc_file_range()
8824 		em->disk_num_bytes = ins.offset;  in __btrfs_prealloc_file_range()
8825 		em->ram_bytes = ins.offset;  in __btrfs_prealloc_file_range()
8826 		em->flags |= EXTENT_FLAG_PREALLOC;  in __btrfs_prealloc_file_range()
8827 		em->generation = trans->transid;  in __btrfs_prealloc_file_range()
8829 		ret = btrfs_replace_extent_map_range(BTRFS_I(inode), em, true);  in __btrfs_prealloc_file_range()
8830 		free_extent_map(em);  in __btrfs_prealloc_file_range()
9255 	struct extent_map *em;  in btrfs_encoded_read()  local
9319 	em = btrfs_get_extent(inode, NULL, start, lockend - start + 1);  in btrfs_encoded_read()
9320 	if (IS_ERR(em)) {  in btrfs_encoded_read()
9321 		ret = PTR_ERR(em);  in btrfs_encoded_read()
9325 	if (em->disk_bytenr == EXTENT_MAP_INLINE) {  in btrfs_encoded_read()
9326 		u64 extent_start = em->start;  in btrfs_encoded_read()
9332 		free_extent_map(em);  in btrfs_encoded_read()
9333 		em = NULL;  in btrfs_encoded_read()
9344 	encoded->len = min_t(u64, extent_map_end(em),  in btrfs_encoded_read()
9346 	if (em->disk_bytenr == EXTENT_MAP_HOLE ||  in btrfs_encoded_read()
9347 	    (em->flags & EXTENT_FLAG_PREALLOC)) {  in btrfs_encoded_read()
9352 	} else if (extent_map_is_compressed(em)) {  in btrfs_encoded_read()
9353 		*disk_bytenr = em->disk_bytenr;  in btrfs_encoded_read()
9358 		if (em->disk_num_bytes > count) {  in btrfs_encoded_read()
9362 		*disk_io_size = em->disk_num_bytes;  in btrfs_encoded_read()
9363 		count = em->disk_num_bytes;  in btrfs_encoded_read()
9364 		encoded->unencoded_len = em->ram_bytes;  in btrfs_encoded_read()
9365 		encoded->unencoded_offset = iocb->ki_pos - (em->start - em->offset);  in btrfs_encoded_read()
9367 							       extent_map_compression(em));  in btrfs_encoded_read()
9372 		*disk_bytenr = extent_map_block_start(em) + (start - em->start);  in btrfs_encoded_read()
9385 	free_extent_map(em);  in btrfs_encoded_read()
9386 	em = NULL;  in btrfs_encoded_read()
9401 	free_extent_map(em);  in btrfs_encoded_read()
9431 	struct extent_map *em;  in btrfs_do_encoded_write()  local
9604 	em = btrfs_create_io_em(inode, start, &file_extent, BTRFS_ORDERED_COMPRESSED);  in btrfs_do_encoded_write()
9605 	if (IS_ERR(em)) {  in btrfs_do_encoded_write()
9606 		ret = PTR_ERR(em);  in btrfs_do_encoded_write()
9609 	free_extent_map(em);  in btrfs_do_encoded_write()
9802 	struct extent_map *em = NULL;  in btrfs_swap_activate()  local
9898 		em = btrfs_get_extent(BTRFS_I(inode), NULL, start, len);  in btrfs_swap_activate()
9899 		if (IS_ERR(em)) {  in btrfs_swap_activate()
9900 			ret = PTR_ERR(em);  in btrfs_swap_activate()
9904 		if (em->disk_bytenr == EXTENT_MAP_HOLE) {  in btrfs_swap_activate()
9909 		if (em->disk_bytenr == EXTENT_MAP_INLINE) {  in btrfs_swap_activate()
9921 		if (extent_map_is_compressed(em)) {  in btrfs_swap_activate()
9927 		logical_block_start = extent_map_block_start(em) + (start - em->start);  in btrfs_swap_activate()
9928 		len = min(len, em->len - (start - em->start));  in btrfs_swap_activate()
9929 		free_extent_map(em);  in btrfs_swap_activate()
9930 		em = NULL;  in btrfs_swap_activate()
10025 	if (!IS_ERR_OR_NULL(em))  in btrfs_swap_activate()
10026 		free_extent_map(em);  in btrfs_swap_activate()