464 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options_mp()  local
496 		opts->csum_reqd = READ_ONCE(msk->csum_enabled);  in mptcp_established_options_mp()
570 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options_dss()  local
577 	opts->csum_reqd = READ_ONCE(msk->csum_enabled);  in mptcp_established_options_dss()
602 	if (!READ_ONCE(msk->can_ack)) {  in mptcp_established_options_dss()
607 	ack_seq = READ_ONCE(msk->ack_seq);  in mptcp_established_options_dss()
608 	if (READ_ONCE(msk->use_64bit_ack)) {  in mptcp_established_options_dss()
619 	WRITE_ONCE(msk->old_wspace, __mptcp_space((struct sock *)msk));  in mptcp_established_options_dss()
664 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options_add_addr()  local
674 	if (!mptcp_pm_should_add_signal(msk) ||  in mptcp_established_options_add_addr()
676 	    !mptcp_pm_add_addr_signal(msk, skb, opt_size, remaining, &opts->addr,  in mptcp_established_options_add_addr()
701 		opts->ahmac = add_addr_generate_hmac(msk->local_key,  in mptcp_established_options_add_addr()
702 						     msk->remote_key,  in mptcp_established_options_add_addr()
717 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options_rm_addr()  local
721 	if (!mptcp_pm_should_rm_signal(msk) ||  in mptcp_established_options_rm_addr()
722 	    !(mptcp_pm_rm_addr_signal(msk, remaining, &rm_list)))  in mptcp_established_options_rm_addr()
814 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_established_options()  local
821 	if (unlikely(__mptcp_check_fallback(msk)))  in mptcp_established_options()
836 	snd_data_fin = mptcp_data_fin_enabled(msk);  in mptcp_established_options()
904 static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk,  in check_fully_established()  argument
920 		    READ_ONCE(msk->pm.server_side))  in check_fully_established()
942 		WRITE_ONCE(msk->fully_established, true);  in check_fully_established()
954 		pr_fallback(msk);  in check_fully_established()
955 		__mptcp_do_fallback(msk);  in check_fully_established()
960 		WRITE_ONCE(msk->pm.remote_deny_join_id0, true);  in check_fully_established()
962 	if (unlikely(!READ_ONCE(msk->pm.server_side)))  in check_fully_established()
978 		mptcp_pm_subflow_established(msk);  in check_fully_established()
980 		mptcp_pm_fully_established(msk, ssk, GFP_ATOMIC);  in check_fully_established()
1005 static void ack_update_msk(struct mptcp_sock *msk,  in ack_update_msk()  argument
1009 	u64 new_wnd_end, new_snd_una, snd_nxt = READ_ONCE(msk->snd_nxt);  in ack_update_msk()
1010 	struct sock *sk = (struct sock *)msk;  in ack_update_msk()
1019 	old_snd_una = msk->snd_una;  in ack_update_msk()
1024 		if (!msk->recovery || after64(new_snd_una, msk->recovery_snd_nxt))  in ack_update_msk()
1030 	if (after64(new_wnd_end, msk->wnd_end))  in ack_update_msk()
1031 		msk->wnd_end = new_wnd_end;  in ack_update_msk()
1034 	if (after64(msk->wnd_end, READ_ONCE(msk->snd_nxt)))  in ack_update_msk()
1038 		msk->snd_una = new_snd_una;  in ack_update_msk()
1045 			     new_wnd_end, msk->wnd_end);  in ack_update_msk()
1048 bool mptcp_update_rcv_data_fin(struct mptcp_sock *msk, u64 data_fin_seq, bool use_64bit)  in mptcp_update_rcv_data_fin()  argument
1055 	if (READ_ONCE(msk->rcv_data_fin))  in mptcp_update_rcv_data_fin()
1058 	WRITE_ONCE(msk->rcv_data_fin_seq,  in mptcp_update_rcv_data_fin()
1059 		   mptcp_expand_seq(READ_ONCE(msk->ack_seq), data_fin_seq, use_64bit));  in mptcp_update_rcv_data_fin()
1060 	WRITE_ONCE(msk->rcv_data_fin, 1);  in mptcp_update_rcv_data_fin()
1065 static bool add_addr_hmac_valid(struct mptcp_sock *msk,  in add_addr_hmac_valid()  argument
1073 	hmac = add_addr_generate_hmac(msk->remote_key,  in add_addr_hmac_valid()
1074 				      msk->local_key,  in add_addr_hmac_valid()
1078 		 msk, (unsigned long long)hmac,  in add_addr_hmac_valid()
1088 	struct mptcp_sock *msk = mptcp_sk(subflow->conn);  in mptcp_incoming_options()  local
1092 	if (__mptcp_check_fallback(msk)) {  in mptcp_incoming_options()
1111 	if (!check_fully_established(msk, sk, subflow, skb, &mp_opt))  in mptcp_incoming_options()
1116 		    msk->local_key == mp_opt.rcvr_key) {  in mptcp_incoming_options()
1117 			WRITE_ONCE(msk->rcv_fastclose, true);  in mptcp_incoming_options()
1118 			mptcp_schedule_work((struct sock *)msk);  in mptcp_incoming_options()
1122 		    add_addr_hmac_valid(msk, &mp_opt)) {  in mptcp_incoming_options()
1124 				mptcp_pm_add_addr_received(msk, &mp_opt.addr);  in mptcp_incoming_options()
1127 				mptcp_pm_add_addr_echoed(msk, &mp_opt.addr);  in mptcp_incoming_options()
1128 				mptcp_pm_del_add_timer(msk, &mp_opt.addr, true);  in mptcp_incoming_options()
1137 			mptcp_pm_rm_addr_received(msk, &mp_opt.rm_list);  in mptcp_incoming_options()
1163 		ack_update_msk(msk, sk, &mp_opt);  in mptcp_incoming_options()
1172 		    mptcp_update_rcv_data_fin(msk, mp_opt.data_seq, mp_opt.dsn64) &&  in mptcp_incoming_options()
1173 		    schedule_work(&msk->work))  in mptcp_incoming_options()
1218 	struct mptcp_sock *msk;  in mptcp_set_rwin()  local
1222 	msk = mptcp_sk(subflow->conn);  in mptcp_set_rwin()
1224 	ack_seq = READ_ONCE(msk->ack_seq) + tp->rcv_wnd;  in mptcp_set_rwin()
1226 	if (after64(ack_seq, READ_ONCE(msk->rcv_wnd_sent)))  in mptcp_set_rwin()
1227 		WRITE_ONCE(msk->rcv_wnd_sent, ack_seq);  in mptcp_set_rwin()