1000 	struct extent_map *em = NULL;  in check_defrag_in_cache()  local
1005 	em = lookup_extent_mapping(em_tree, offset, PAGE_SIZE);  in check_defrag_in_cache()
1008 	if (em) {  in check_defrag_in_cache()
1009 		end = extent_map_end(em);  in check_defrag_in_cache()
1010 		free_extent_map(em);  in check_defrag_in_cache()
1094 	struct extent_map *em;  in defrag_lookup_extent()  local
1102 	em = lookup_extent_mapping(em_tree, start, len);  in defrag_lookup_extent()
1105 	if (!em) {  in defrag_lookup_extent()
1111 		em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, start, len, 0);  in defrag_lookup_extent()
1114 		if (IS_ERR(em))  in defrag_lookup_extent()
1118 	return em;  in defrag_lookup_extent()
1121 static bool defrag_check_next_extent(struct inode *inode, struct extent_map *em)  in defrag_check_next_extent()  argument
1127 	if (em->start + em->len >= i_size_read(inode))  in defrag_check_next_extent()
1130 	next = defrag_lookup_extent(inode, em->start + em->len);  in defrag_check_next_extent()
1133 	else if ((em->block_start + em->block_len == next->block_start) &&  in defrag_check_next_extent()
1134 		 (em->block_len > SZ_128K && next->block_len > SZ_128K))  in defrag_check_next_extent()
1145 	struct extent_map *em;  in should_defrag_range()  local
1159 	em = defrag_lookup_extent(inode, start);  in should_defrag_range()
1160 	if (!em)  in should_defrag_range()
1164 	if (em->block_start >= EXTENT_MAP_LAST_BYTE) {  in should_defrag_range()
1172 	next_mergeable = defrag_check_next_extent(inode, em);  in should_defrag_range()
1178 	    (em->len >= thresh || (!next_mergeable && !prev_mergeable)))  in should_defrag_range()
1190 		*defrag_end = extent_map_end(em);  in should_defrag_range()
1193 		*skip = extent_map_end(em);  in should_defrag_range()
1197 	free_extent_map(em);  in should_defrag_range()
3690 	struct extent_map *em;  in clone_update_extent_map()  local
3693 	em = alloc_extent_map();  in clone_update_extent_map()
3694 	if (!em) {  in clone_update_extent_map()
3704 		btrfs_extent_item_to_extent_map(inode, path, fi, false, em);  in clone_update_extent_map()
3705 		em->generation = -1;  in clone_update_extent_map()
3711 		em->start = hole_offset;  in clone_update_extent_map()
3712 		em->len = hole_len;  in clone_update_extent_map()
3713 		em->ram_bytes = em->len;  in clone_update_extent_map()
3714 		em->orig_start = hole_offset;  in clone_update_extent_map()
3715 		em->block_start = EXTENT_MAP_HOLE;  in clone_update_extent_map()
3716 		em->block_len = 0;  in clone_update_extent_map()
3717 		em->orig_block_len = 0;  in clone_update_extent_map()
3718 		em->compress_type = BTRFS_COMPRESS_NONE;  in clone_update_extent_map()
3719 		em->generation = trans->transid;  in clone_update_extent_map()
3724 		ret = add_extent_mapping(em_tree, em, 1);  in clone_update_extent_map()
3727 			free_extent_map(em);  in clone_update_extent_map()
3730 		btrfs_drop_extent_cache(inode, em->start,  in clone_update_extent_map()
3731 					em->start + em->len - 1, 0);  in clone_update_extent_map()