2276 	struct extent_map *em;  in btrfs_get_io_failure_record()  local
2296 		em = lookup_extent_mapping(em_tree, start, failrec->len);  in btrfs_get_io_failure_record()
2297 		if (!em) {  in btrfs_get_io_failure_record()
2303 		if (em->start > start || em->start + em->len <= start) {  in btrfs_get_io_failure_record()
2304 			free_extent_map(em);  in btrfs_get_io_failure_record()
2305 			em = NULL;  in btrfs_get_io_failure_record()
2308 		if (!em) {  in btrfs_get_io_failure_record()
2313 		logical = start - em->start;  in btrfs_get_io_failure_record()
2314 		logical = em->block_start + logical;  in btrfs_get_io_failure_record()
2315 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in btrfs_get_io_failure_record()
2316 			logical = em->block_start;  in btrfs_get_io_failure_record()
2319 						 em->compress_type);  in btrfs_get_io_failure_record()
2326 		free_extent_map(em);  in btrfs_get_io_failure_record()
2945 	struct extent_map *em;  in __get_extent_map()  local
2948 		em = *em_cached;  in __get_extent_map()
2949 		if (extent_map_in_tree(em) && start >= em->start &&  in __get_extent_map()
2950 		    start < extent_map_end(em)) {  in __get_extent_map()
2951 			atomic_inc(&em->refs);  in __get_extent_map()
2952 			return em;  in __get_extent_map()
2955 		free_extent_map(em);  in __get_extent_map()
2959 	em = get_extent(inode, page, pg_offset, start, len, 0);  in __get_extent_map()
2960 	if (em_cached && !IS_ERR_OR_NULL(em)) {  in __get_extent_map()
2962 		atomic_inc(&em->refs);  in __get_extent_map()
2963 		*em_cached = em;  in __get_extent_map()
2965 	return em;  in __get_extent_map()
2991 	struct extent_map *em;  in __do_readpage()  local
3046 		em = __get_extent_map(inode, page, pg_offset, cur,  in __do_readpage()
3048 		if (IS_ERR_OR_NULL(em)) {  in __do_readpage()
3054 		extent_offset = cur - em->start;  in __do_readpage()
3055 		BUG_ON(extent_map_end(em) <= cur);  in __do_readpage()
3058 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) {  in __do_readpage()
3061 						 em->compress_type);  in __do_readpage()
3064 		iosize = min(extent_map_end(em) - cur, end - cur + 1);  in __do_readpage()
3065 		cur_end = min(extent_map_end(em) - 1, end);  in __do_readpage()
3068 			disk_io_size = em->block_len;  in __do_readpage()
3069 			sector = em->block_start >> 9;  in __do_readpage()
3071 			sector = (em->block_start + extent_offset) >> 9;  in __do_readpage()
3074 		bdev = em->bdev;  in __do_readpage()
3075 		block_start = em->block_start;  in __do_readpage()
3076 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in __do_readpage()
3113 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) &&  in __do_readpage()
3115 		    *prev_em_start != em->orig_start)  in __do_readpage()
3119 			*prev_em_start = em->orig_start;  in __do_readpage()
3121 		free_extent_map(em);  in __do_readpage()
3122 		em = NULL;  in __do_readpage()
3452 	struct extent_map *em;  in __extent_writepage_io()  local
3501 		em = epd->get_extent(inode, page, pg_offset, cur,  in __extent_writepage_io()
3503 		if (IS_ERR_OR_NULL(em)) {  in __extent_writepage_io()
3505 			ret = PTR_ERR_OR_ZERO(em);  in __extent_writepage_io()
3509 		extent_offset = cur - em->start;  in __extent_writepage_io()
3510 		em_end = extent_map_end(em);  in __extent_writepage_io()
3515 		sector = (em->block_start + extent_offset) >> 9;  in __extent_writepage_io()
3516 		bdev = em->bdev;  in __extent_writepage_io()
3517 		block_start = em->block_start;  in __extent_writepage_io()
3518 		compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);  in __extent_writepage_io()
3519 		free_extent_map(em);  in __extent_writepage_io()
3520 		em = NULL;  in __extent_writepage_io()
4385 	struct extent_map *em;  in try_release_extent_mapping()  local
4395 			em = lookup_extent_mapping(map, start, len);  in try_release_extent_mapping()
4396 			if (!em) {  in try_release_extent_mapping()
4400 			if (test_bit(EXTENT_FLAG_PINNED, &em->flags) ||  in try_release_extent_mapping()
4401 			    em->start != start) {  in try_release_extent_mapping()
4403 				free_extent_map(em);  in try_release_extent_mapping()
4406 			if (!test_range_bit(tree, em->start,  in try_release_extent_mapping()
4407 					    extent_map_end(em) - 1,  in try_release_extent_mapping()
4410 				remove_extent_mapping(map, em);  in try_release_extent_mapping()
4412 				free_extent_map(em);  in try_release_extent_mapping()
4414 			start = extent_map_end(em);  in try_release_extent_mapping()
4418 			free_extent_map(em);  in try_release_extent_mapping()
4434 	struct extent_map *em;  in get_extent_skip_holes()  local
4445 		em = get_extent(inode, NULL, 0, offset, len, 0);  in get_extent_skip_holes()
4446 		if (IS_ERR_OR_NULL(em))  in get_extent_skip_holes()
4447 			return em;  in get_extent_skip_holes()
4450 		if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags) &&  in get_extent_skip_holes()
4451 		    em->block_start != EXTENT_MAP_HOLE) {  in get_extent_skip_holes()
4452 			return em;  in get_extent_skip_holes()
4456 		offset = extent_map_end(em);  in get_extent_skip_holes()
4457 		free_extent_map(em);  in get_extent_skip_holes()
4477 	struct extent_map *em = NULL;  in extent_fiemap()  local
4542 	em = get_extent_skip_holes(inode, start, last_for_get_extent,  in extent_fiemap()
4544 	if (!em)  in extent_fiemap()
4546 	if (IS_ERR(em)) {  in extent_fiemap()
4547 		ret = PTR_ERR(em);  in extent_fiemap()
4555 		if (em->start >= max || extent_map_end(em) < off)  in extent_fiemap()
4564 		em_start = max(em->start, off);  in extent_fiemap()
4572 		if (!test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))  in extent_fiemap()
4573 			offset_in_extent = em_start - em->start;  in extent_fiemap()
4574 		em_end = extent_map_end(em);  in extent_fiemap()
4582 		off = extent_map_end(em);  in extent_fiemap()
4586 		if (em->block_start == EXTENT_MAP_LAST_BYTE) {  in extent_fiemap()
4589 		} else if (em->block_start == EXTENT_MAP_INLINE) {  in extent_fiemap()
4592 		} else if (em->block_start == EXTENT_MAP_DELALLOC) {  in extent_fiemap()
4596 			u64 bytenr = em->block_start -  in extent_fiemap()
4597 				(em->start - em->orig_start);  in extent_fiemap()
4599 			disko = em->block_start + offset_in_extent;  in extent_fiemap()
4617 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))  in extent_fiemap()
4619 		if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))  in extent_fiemap()
4622 		free_extent_map(em);  in extent_fiemap()
4623 		em = NULL;  in extent_fiemap()
4631 		em = get_extent_skip_holes(inode, off, last_for_get_extent,  in extent_fiemap()
4633 		if (IS_ERR(em)) {  in extent_fiemap()
4634 			ret = PTR_ERR(em);  in extent_fiemap()
4637 		if (!em) {  in extent_fiemap()
4650 	free_extent_map(em);  in extent_fiemap()