2484 	struct extent_map *em;  in btrfs_get_io_failure_record()  local
2516 	em = lookup_extent_mapping(em_tree, start, failrec->len);  in btrfs_get_io_failure_record()
2517 	if (!em) {  in btrfs_get_io_failure_record()
2523 	if (em->start > start || em->start + em->len <= start) {  in btrfs_get_io_failure_record()
2524 		free_extent_map(em);  in btrfs_get_io_failure_record()
2525 		em = NULL;  in btrfs_get_io_failure_record()
2528 	if (!em) {  in btrfs_get_io_failure_record()
2533 	logical = start - em->start;  in btrfs_get_io_failure_record()
2534 	logical = em->block_start + logical;  in btrfs_get_io_failure_record()
2535 	if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in btrfs_get_io_failure_record()
2536 		logical = em->block_start;  in btrfs_get_io_failure_record()
2538 		extent_set_compress_type(&failrec->bio_flags, em->compress_type);  in btrfs_get_io_failure_record()
2546 	free_extent_map(em);  in btrfs_get_io_failure_record()
3249 	struct extent_map *em;  in calc_bio_boundaries()  local
3265 	em = btrfs_get_chunk_map(fs_info, logical, fs_info->sectorsize);  in calc_bio_boundaries()
3266 	if (IS_ERR(em))  in calc_bio_boundaries()
3267 		return PTR_ERR(em);  in calc_bio_boundaries()
3268 	ret = btrfs_get_io_geometry(fs_info, em, btrfs_op(bio_ctrl->bio),  in calc_bio_boundaries()
3270 	free_extent_map(em);  in calc_bio_boundaries()
3520 	struct extent_map *em;  in __get_extent_map()  local
3523 		em = *em_cached;  in __get_extent_map()
3524 		if (extent_map_in_tree(em) && start >= em->start &&  in __get_extent_map()
3525 		    start < extent_map_end(em)) {  in __get_extent_map()
3526 			refcount_inc(&em->refs);  in __get_extent_map()
3527 			return em;  in __get_extent_map()
3530 		free_extent_map(em);  in __get_extent_map()
3534 	em = btrfs_get_extent(BTRFS_I(inode), page, pg_offset, start, len);  in __get_extent_map()
3535 	if (em_cached && !IS_ERR_OR_NULL(em)) {  in __get_extent_map()
3537 		refcount_inc(&em->refs);  in __get_extent_map()
3538 		*em_cached = em;  in __get_extent_map()
3540 	return em;  in __get_extent_map()
3562 	struct extent_map *em;  in btrfs_do_readpage()  local
3615 		em = __get_extent_map(inode, page, pg_offset, cur,  in btrfs_do_readpage()
3617 		if (IS_ERR_OR_NULL(em)) {  in btrfs_do_readpage()
3622 		extent_offset = cur - em->start;  in btrfs_do_readpage()
3623 		BUG_ON(extent_map_end(em) <= cur);  in btrfs_do_readpage()
3626 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in btrfs_do_readpage()
3629 						 em->compress_type);  in btrfs_do_readpage()
3632 		iosize = min(extent_map_end(em) - cur, end - cur + 1);  in btrfs_do_readpage()
3633 		cur_end = min(extent_map_end(em) - 1, end);  in btrfs_do_readpage()
3636 			disk_bytenr = em->block_start;  in btrfs_do_readpage()
3638 			disk_bytenr = em->block_start + extent_offset;  in btrfs_do_readpage()
3639 		block_start = em->block_start;  in btrfs_do_readpage()
3640 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in btrfs_do_readpage()
3677 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) &&  in btrfs_do_readpage()
3679 		    *prev_em_start != em->start)  in btrfs_do_readpage()
3683 			*prev_em_start = em->start;  in btrfs_do_readpage()
3685 		free_extent_map(em);  in btrfs_do_readpage()
3686 		em = NULL;  in btrfs_do_readpage()
3907 	struct extent_map *em;  in __extent_writepage_io()  local
3958 		em = btrfs_get_extent(inode, NULL, 0, cur, end - cur + 1);  in __extent_writepage_io()
3959 		if (IS_ERR_OR_NULL(em)) {  in __extent_writepage_io()
3961 			ret = PTR_ERR_OR_ZERO(em);  in __extent_writepage_io()
3965 		extent_offset = cur - em->start;  in __extent_writepage_io()
3966 		em_end = extent_map_end(em);  in __extent_writepage_io()
3969 		ASSERT(IS_ALIGNED(em->start, fs_info->sectorsize));  in __extent_writepage_io()
3970 		ASSERT(IS_ALIGNED(em->len, fs_info->sectorsize));  in __extent_writepage_io()
3971 		block_start = em->block_start;  in __extent_writepage_io()
3972 		compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);  in __extent_writepage_io()
3973 		disk_bytenr = em->block_start + extent_offset;  in __extent_writepage_io()
3981 		if (btrfs_use_zone_append(inode, em->block_start))  in __extent_writepage_io()
3984 		free_extent_map(em);  in __extent_writepage_io()
3985 		em = NULL;  in __extent_writepage_io()
5240 	struct extent_map *em;  in try_release_extent_mapping()  local
5256 			em = lookup_extent_mapping(map, start, len);  in try_release_extent_mapping()
5257 			if (!em) {  in try_release_extent_mapping()
5261 			if (test_bit(EXTENT_FLAG_PINNED, &em->flags) ||  in try_release_extent_mapping()
5262 			    em->start != start) {  in try_release_extent_mapping()
5264 				free_extent_map(em);  in try_release_extent_mapping()
5267 			if (test_range_bit(tree, em->start,  in try_release_extent_mapping()
5268 					   extent_map_end(em) - 1,  in try_release_extent_mapping()
5277 			if (list_empty(&em->list) ||  in try_release_extent_mapping()
5278 			    test_bit(EXTENT_FLAG_LOGGING, &em->flags))  in try_release_extent_mapping()
5291 			if (em->generation >= cur_gen)  in try_release_extent_mapping()
5302 			remove_extent_mapping(map, em);  in try_release_extent_mapping()
5304 			free_extent_map(em);  in try_release_extent_mapping()
5306 			start = extent_map_end(em);  in try_release_extent_mapping()
5310 			free_extent_map(em);  in try_release_extent_mapping()
5326 	struct extent_map *em;  in get_extent_skip_holes()  local
5337 		em = btrfs_get_extent_fiemap(inode, offset, len);  in get_extent_skip_holes()
5338 		if (IS_ERR_OR_NULL(em))  in get_extent_skip_holes()
5339 			return em;  in get_extent_skip_holes()
5342 		if (em->block_start != EXTENT_MAP_HOLE)  in get_extent_skip_holes()
5343 			return em;  in get_extent_skip_holes()
5346 		offset = extent_map_end(em);  in get_extent_skip_holes()
5347 		free_extent_map(em);  in get_extent_skip_holes()
5479 	struct extent_map *em = NULL;  in extent_fiemap()  local
5561 	em = get_extent_skip_holes(inode, start, last_for_get_extent);  in extent_fiemap()
5562 	if (!em)  in extent_fiemap()
5564 	if (IS_ERR(em)) {  in extent_fiemap()
5565 		ret = PTR_ERR(em);  in extent_fiemap()
5573 		if (em->start >= max || extent_map_end(em) < off)  in extent_fiemap()
5582 		em_start = max(em->start, off);  in extent_fiemap()
5590 		if (!test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))  in extent_fiemap()
5591 			offset_in_extent = em_start - em->start;  in extent_fiemap()
5592 		em_end = extent_map_end(em);  in extent_fiemap()
5595 		if (em->block_start < EXTENT_MAP_LAST_BYTE)  in extent_fiemap()
5596 			disko = em->block_start + offset_in_extent;  in extent_fiemap()
5603 		off = extent_map_end(em);  in extent_fiemap()
5607 		if (em->block_start == EXTENT_MAP_LAST_BYTE) {  in extent_fiemap()
5610 		} else if (em->block_start == EXTENT_MAP_INLINE) {  in extent_fiemap()
5613 		} else if (em->block_start == EXTENT_MAP_DELALLOC) {  in extent_fiemap()
5617 			u64 bytenr = em->block_start -  in extent_fiemap()
5618 				(em->start - em->orig_start);  in extent_fiemap()
5635 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))  in extent_fiemap()
5637 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in extent_fiemap()
5640 		free_extent_map(em);  in extent_fiemap()
5641 		em = NULL;  in extent_fiemap()
5649 		em = get_extent_skip_holes(inode, off, last_for_get_extent);  in extent_fiemap()
5650 		if (IS_ERR(em)) {  in extent_fiemap()
5651 			ret = PTR_ERR(em);  in extent_fiemap()
5654 		if (!em) {  in extent_fiemap()
5669 	free_extent_map(em);  in extent_fiemap()