443 	struct mptcp_ext *mpext;  in mptcp_established_options_mp()  local
463 		mpext = mptcp_get_ext(skb);  in mptcp_established_options_mp()
464 		data_len = mpext ? mpext->data_len : 0;  in mptcp_established_options_mp()
486 				opts->data_seq = mpext->data_seq;  in mptcp_established_options_mp()
487 				opts->subflow_seq = mpext->subflow_seq;  in mptcp_established_options_mp()
488 				opts->csum = mpext->csum;  in mptcp_established_options_mp()
558 	struct mptcp_ext *mpext;  in mptcp_established_options_dss()  local
564 	mpext = skb ? mptcp_get_ext(skb) : NULL;  in mptcp_established_options_dss()
566 	if (!skb || (mpext && mpext->use_map) || snd_data_fin_enable) {  in mptcp_established_options_dss()
569 		if (mpext) {  in mptcp_established_options_dss()
573 			opts->ext_copy = *mpext;  in mptcp_established_options_dss()
1077 	struct mptcp_ext *mpext;  in mptcp_incoming_options()  local
1165 	mpext = skb_ext_add(skb, SKB_EXT_MPTCP);  in mptcp_incoming_options()
1166 	if (!mpext)  in mptcp_incoming_options()
1169 	memset(mpext, 0, sizeof(*mpext));  in mptcp_incoming_options()
1177 					     &mpext->data_seq);  in mptcp_incoming_options()
1178 			mpext->data_seq++;  in mptcp_incoming_options()
1179 			mpext->subflow_seq = 1;  in mptcp_incoming_options()
1180 			mpext->dsn64 = 1;  in mptcp_incoming_options()
1181 			mpext->mpc_map = 1;  in mptcp_incoming_options()
1182 			mpext->data_fin = 0;  in mptcp_incoming_options()
1184 			mpext->data_seq = mp_opt.data_seq;  in mptcp_incoming_options()
1185 			mpext->subflow_seq = mp_opt.subflow_seq;  in mptcp_incoming_options()
1186 			mpext->dsn64 = mp_opt.dsn64;  in mptcp_incoming_options()
1187 			mpext->data_fin = mp_opt.data_fin;  in mptcp_incoming_options()
1189 		mpext->data_len = mp_opt.data_len;  in mptcp_incoming_options()
1190 		mpext->use_map = 1;  in mptcp_incoming_options()
1191 		mpext->csum_reqd = !!(mp_opt.suboptions & OPTION_MPTCP_CSUMREQD);  in mptcp_incoming_options()
1193 		if (mpext->csum_reqd)  in mptcp_incoming_options()
1194 			mpext->csum = mp_opt.csum;  in mptcp_incoming_options()
1235 static __sum16 mptcp_make_csum(const struct mptcp_ext *mpext)  in mptcp_make_csum()  argument
1237 	return __mptcp_make_csum(mpext->data_seq, mpext->subflow_seq, mpext->data_len,  in mptcp_make_csum()
1238 				 ~csum_unfold(mpext->csum));  in mptcp_make_csum()
1281 		struct mptcp_ext *mpext = &opts->ext_copy;  in mptcp_write_options()  local
1285 		if (mpext->use_ack) {  in mptcp_write_options()
1287 			if (mpext->ack64) {  in mptcp_write_options()
1295 		if (mpext->use_map) {  in mptcp_write_options()
1302 			if (mpext->data_fin)  in mptcp_write_options()
1311 		if (mpext->use_ack) {  in mptcp_write_options()
1312 			if (mpext->ack64) {  in mptcp_write_options()
1313 				put_unaligned_be64(mpext->data_ack, ptr);  in mptcp_write_options()
1316 				put_unaligned_be32(mpext->data_ack32, ptr);  in mptcp_write_options()
1321 		if (mpext->use_map) {  in mptcp_write_options()
1322 			put_unaligned_be64(mpext->data_seq, ptr);  in mptcp_write_options()
1324 			put_unaligned_be32(mpext->subflow_seq, ptr);  in mptcp_write_options()
1327 				put_len_csum(mpext->data_len,  in mptcp_write_options()
1328 					     mptcp_make_csum(mpext),  in mptcp_write_options()
1331 				put_unaligned_be32(mpext->data_len << 16 |  in mptcp_write_options()