#define F_UID(f) REQ_EXTRA(f, preserve_uid)->unum
#define F_GID(f) REQ_EXTRA(f, preserve_gid)->unum
#define F_ACL(f) REQ_EXTRA(f, preserve_acls)->unum
#define F_UID(f) REQ_EXTRA(f, preserve_uid)->unum
#define F_GID(f) REQ_EXTRA(f, preserve_gid)->unum
#define F_ACL(f) REQ_EXTRA(f, preserve_acls)->unum