simple_xattr_space
*freed_space += simple_xattr_space(xattr->name, xattr->size);
size_t simple_xattr_space(const char *name, size_t size);
ispace += simple_xattr_space(xattr->name,
ispace -= simple_xattr_space(new_xattr->name, new_xattr->size);
ispace = simple_xattr_space(name, size);
ispace = simple_xattr_space(old_xattr->name,