BFS_S_INDEX_DIR
|| (dataStream->Mode() & BFS_S_INDEX_DIR) && toMode[header.data_type] != mode
fAllowDuplicates = (dataStream->Mode() & (BFS_S_INDEX_DIR | 0777)) == BFS_S_INDEX_DIR;
if ((inode->mode & BFS_S_INDEX_DIR) == 0) {
} else if (inode->mode & BFS_S_INDEX_DIR) {
#define BFS_S_ISINDEX(mode) (((mode) & BFS_S_INDEX_DIR) == BFS_S_INDEX_DIR)