VBVA_F_RECORD_PARTIAL
record->len_and_flags = VBVA_F_RECORD_PARTIAL;
!(record->len_and_flags & VBVA_F_RECORD_PARTIAL));
record->len_and_flags &= ~VBVA_F_RECORD_PARTIAL;
!record || !(record->len_and_flags & VBVA_F_RECORD_PARTIAL))