334 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);  in mptcp_syn_options()  local
339 	subflow->snd_isn = TCP_SKB_CB(skb)->end_seq;  in mptcp_syn_options()
340 	if (subflow->request_mptcp) {  in mptcp_syn_options()
344 	} else if (subflow->request_join) {  in mptcp_syn_options()
345 		pr_debug("remote_token=%u, nonce=%u", subflow->remote_token,  in mptcp_syn_options()
346 			 subflow->local_nonce);  in mptcp_syn_options()
348 		opts->join_id = subflow->local_id;  in mptcp_syn_options()
349 		opts->token = subflow->remote_token;  in mptcp_syn_options()
350 		opts->nonce = subflow->local_nonce;  in mptcp_syn_options()
351 		opts->backup = subflow->request_bkup;  in mptcp_syn_options()
395 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);  in mptcp_established_options_mp()  local
409 	if (subflow->fully_established ||  in mptcp_established_options_mp()
410 	    subflow->snd_isn != TCP_SKB_CB(skb)->seq)  in mptcp_established_options_mp()
413 	if (subflow->mp_capable) {  in mptcp_established_options_mp()
423 		opts->sndr_key = subflow->local_key;  in mptcp_established_options_mp()
424 		opts->rcvr_key = subflow->remote_key;  in mptcp_established_options_mp()
437 			 subflow, subflow->local_key, subflow->remote_key,  in mptcp_established_options_mp()
441 	} else if (subflow->mp_join) {  in mptcp_established_options_mp()
443 		memcpy(opts->hmac, subflow->hmac, MPTCPOPT_HMAC_LEN);  in mptcp_established_options_mp()
445 		pr_debug("subflow=%p", subflow);  in mptcp_established_options_mp()
453 static void mptcp_write_data_fin(struct mptcp_subflow_context *subflow,  in mptcp_write_data_fin()  argument
459 	u64 data_fin_tx_seq = READ_ONCE(mptcp_sk(subflow->conn)->write_seq) - 1;  in mptcp_write_data_fin()
486 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);  in mptcp_established_options_dss()  local
487 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options_dss()
508 			mptcp_write_data_fin(subflow, skb, &opts->ext_copy);  in mptcp_established_options_dss()
581 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);  in mptcp_established_options_add_addr()  local
582 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options_add_addr()
629 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);  in mptcp_established_options_rm_addr()  local
630 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options_rm_addr()
722 				    struct mptcp_subflow_context *subflow,  in check_fully_established()  argument
729 	if (likely(subflow->fully_established)) {  in check_fully_established()
734 		if (TCP_SKB_CB(skb)->seq == subflow->ssn_offset + 1 &&  in check_fully_established()
736 		    subflow->mp_join && mp_opt->mp_join &&  in check_fully_established()
747 	if (TCP_SKB_CB(skb)->seq != subflow->ssn_offset + 1) {  in check_fully_established()
748 		if (subflow->mp_join)  in check_fully_established()
750 		return subflow->mp_capable;  in check_fully_established()
757 		subflow->fully_established = 1;  in check_fully_established()
767 		if (subflow->mp_join)  in check_fully_established()
769 		subflow->mp_capable = 0;  in check_fully_established()
777 	mptcp_subflow_fully_established(subflow, mp_opt);  in check_fully_established()
780 	if (likely(subflow->pm_notified))  in check_fully_established()
783 	subflow->pm_notified = 1;  in check_fully_established()
784 	if (subflow->mp_join) {  in check_fully_established()
786 		mptcp_pm_subflow_established(msk, subflow);  in check_fully_established()
884 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);  in mptcp_incoming_options()  local
885 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_incoming_options()
893 	if (!check_fully_established(msk, sk, subflow, skb, &mp_opt))  in mptcp_incoming_options()
944 			sock_hold(subflow->conn);  in mptcp_incoming_options()
960 			mptcp_crypto_key_sha(subflow->remote_key, NULL,  in mptcp_incoming_options()