rem: && extent->offset + extent->disk.length >= offset) {
add: && extent->offset + extent->disk.length > offset) {
context: find_file_extent(file_cache_ref *ref, off_t offset, uint32 *_index){	// ToDo: do binary search	for (uint32 index = 0; index < ref->map.count; index++) {		file_extent *extent = ref->map[index];		if (extent->offset <= offset			&& extent->offset + extent->disk.length >= offset) {			if (_index)				*_index = index;			return extent;		}	}	return NULL;}