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/linux/net/mptcp/
H A Dsubflow.c347 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); in subflow_prep_synack() local
355 mptcp_fastopen_subflow_synack_set_params(subflow, req); in subflow_prep_synack()
414 static bool subflow_thmac_valid(struct mptcp_subflow_context *subflow) in subflow_thmac_valid() argument
419 subflow_generate_hmac(subflow->remote_key, subflow->local_key, in subflow_thmac_valid()
420 subflow->remote_nonce, subflow->local_nonce, in subflow_thmac_valid()
424 pr_debug("subflow=%p, token=%u, thmac=%llu, subflow->thmac=%llu\n", in subflow_thmac_valid()
425 subflow, subflow->token, thmac, subflow->thmac); in subflow_thmac_valid()
427 return thmac == subflow->thmac; in subflow_thmac_valid()
432 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_subflow_reset() local
433 struct sock *sk = subflow->conn; in mptcp_subflow_reset()
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H A Dpm.c120 struct mptcp_subflow_context *subflow; in mptcp_lookup_subflow_by_saddr() local
124 list_for_each_entry(subflow, list, node) { in mptcp_lookup_subflow_by_saddr()
125 skc = (struct sock_common *)mptcp_subflow_tcp_sock(subflow); in mptcp_lookup_subflow_by_saddr()
186 struct mptcp_subflow_context *subflow, in __mptcp_pm_send_ack() argument
189 struct sock *ssk = mptcp_subflow_tcp_sock(subflow); in __mptcp_pm_send_ack()
198 subflow->send_mp_prio = 1; in __mptcp_pm_send_ack()
199 subflow->request_bkup = backup; in __mptcp_pm_send_ack()
207 struct mptcp_subflow_context *subflow, in mptcp_pm_send_ack() argument
211 __mptcp_pm_send_ack(msk, subflow, prio, backup); in mptcp_pm_send_ack()
217 struct mptcp_subflow_context *subflow, *alt = NULL; in mptcp_pm_addr_send_ack() local
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H A Dprotocol.c84 * in the fallback case only the current subflow is touching in __mptcp_try_fallback()
105 struct mptcp_subflow_context *subflow; in __mptcp_socket_create() local
116 subflow = mptcp_subflow_ctx(ssock->sk); in __mptcp_socket_create()
117 list_add(&subflow->node, &msk->conn_list); in __mptcp_socket_create()
119 subflow->request_mptcp = 1; in __mptcp_socket_create()
120 subflow->subflow_id = msk->subflow_id++; in __mptcp_socket_create()
122 /* This is the first subflow, always with id 0 */ in __mptcp_socket_create()
123 WRITE_ONCE(subflow->local_id, 0); in __mptcp_socket_create()
130 /* If the MPC handshake is not started, returns the first subflow,
357 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_init_skb() local
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H A Doptions.c56 * close the subflow with a RST, as it is not behaving as negotiated. in mptcp_parse_option()
58 * receiver MUST close the subflow with a RST, as it is considered in mptcp_parse_option()
404 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); in mptcp_syn_options() local
409 subflow->snd_isn = TCP_SKB_CB(skb)->end_seq; in mptcp_syn_options()
410 if (subflow->request_mptcp) { in mptcp_syn_options()
417 subflow->request_mptcp = 0; in mptcp_syn_options()
426 } else if (subflow->request_join) { in mptcp_syn_options()
427 pr_debug("remote_token=%u, nonce=%u\n", subflow->remote_token, in mptcp_syn_options()
428 subflow->local_nonce); in mptcp_syn_options()
430 opts->join_id = subflow->local_id; in mptcp_syn_options()
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H A Dprotocol.h275 u64 local_key; /* protected by the first subflow socket lock
304 bool recovery; /* closing subflow write queue reinjected */
313 u8 pending_state; /* A subflow asked to set this sk_state,
338 * ONCE annotation, the subflow outside the socket
506 /* MPTCP subflow context */
547 is_mptfo : 1, /* subflow is doing TFO */
561 u8 hmac[MPTCPOPT_HMAC_LEN]; /* MPJ subflow only */
605 mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow) in mptcp_subflow_tcp_sock() argument
607 return subflow->tcp_sock; in mptcp_subflow_tcp_sock()
611 mptcp_subflow_ctx_reset(struct mptcp_subflow_context *subflow) in mptcp_subflow_ctx_reset() argument
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H A Dsockopt.c72 struct mptcp_subflow_context *subflow; in mptcp_sol_socket_sync_intval() local
78 mptcp_for_each_subflow(msk, subflow) { in mptcp_sol_socket_sync_intval()
79 struct sock *ssk = mptcp_subflow_tcp_sock(subflow); in mptcp_sol_socket_sync_intval()
116 subflow->setsockopt_seq = msk->setsockopt_seq; in mptcp_sol_socket_sync_intval()
150 struct mptcp_subflow_context *subflow; in mptcp_setsockopt_sol_socket_tstamp() local
160 mptcp_for_each_subflow(msk, subflow) { in mptcp_setsockopt_sol_socket_tstamp()
161 struct sock *ssk = mptcp_subflow_tcp_sock(subflow); in mptcp_setsockopt_sol_socket_tstamp()
210 struct mptcp_subflow_context *subflow; in mptcp_setsockopt_sol_socket_timestamping() local
236 mptcp_for_each_subflow(msk, subflow) { in mptcp_setsockopt_sol_socket_timestamping()
237 struct sock *ssk = mptcp_subflow_tcp_sock(subflow); in mptcp_setsockopt_sol_socket_timestamping()
252 struct mptcp_subflow_context *subflow; mptcp_setsockopt_sol_socket_linger() local
585 struct mptcp_subflow_context *subflow; mptcp_setsockopt_sol_tcp_congestion() local
629 struct mptcp_subflow_context *subflow; __mptcp_setsockopt_set_val() local
652 struct mptcp_subflow_context *subflow; __mptcp_setsockopt_sol_tcp_cork() local
672 struct mptcp_subflow_context *subflow; __mptcp_setsockopt_sol_tcp_nodelay() local
738 struct mptcp_subflow_context *subflow; mptcp_setsockopt_v4_set_tos() local
805 struct mptcp_subflow_context *subflow; mptcp_setsockopt_all_sf() local
1104 struct mptcp_subflow_context *subflow; mptcp_getsockopt_tcpinfo() local
1196 struct mptcp_subflow_context *subflow; mptcp_getsockopt_subflow_addrs() local
1295 struct mptcp_subflow_context *subflow; mptcp_getsockopt_full_info() local
1591 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); mptcp_sockopt_sync_locked() local
1615 struct mptcp_subflow_context *subflow; mptcp_set_rcvlowat() local
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H A Dfastopen.c9 void mptcp_fastopen_subflow_synack_set_params(struct mptcp_subflow_context *subflow, in mptcp_fastopen_subflow_synack_set_params() argument
16 /* on early fallback the subflow context is deleted by in mptcp_fastopen_subflow_synack_set_params()
19 if (!subflow) in mptcp_fastopen_subflow_synack_set_params()
22 ssk = subflow->tcp_sock; in mptcp_fastopen_subflow_synack_set_params()
23 sk = subflow->conn; in mptcp_fastopen_subflow_synack_set_params()
26 subflow->is_mptfo = 1; in mptcp_fastopen_subflow_synack_set_params()
36 mptcp_subflow_lend_fwdmem(subflow, skb); in mptcp_fastopen_subflow_synack_set_params()
39 * space, need to offset it in the subflow sequence, see mptcp_subflow_get_map_offset() in mptcp_fastopen_subflow_synack_set_params()
42 subflow->ssn_offset += skb->len; in mptcp_fastopen_subflow_synack_set_params()
H A Dsched.c162 void mptcp_subflow_set_scheduled(struct mptcp_subflow_context *subflow, in mptcp_sched_get_send()
165 WRITE_ONCE(subflow->scheduled, scheduled); in mptcp_sched_get_send()
170 struct mptcp_subflow_context *subflow; in mptcp_sched_get_send()
185 mptcp_for_each_subflow(msk, subflow) { in mptcp_sched_get_retrans()
186 if (READ_ONCE(subflow->scheduled)) in mptcp_sched_get_retrans()
197 struct mptcp_subflow_context *subflow; in mptcp_sched_get_retrans()
205 mptcp_for_each_subflow(msk, subflow) { in mptcp_sched_get_retrans()
206 if (READ_ONCE(subflow->scheduled)) in mptcp_sched_get_retrans()
151 mptcp_subflow_set_scheduled(struct mptcp_subflow_context * subflow,bool scheduled) mptcp_subflow_set_scheduled() argument
159 struct mptcp_subflow_context *subflow; mptcp_sched_get_send() local
187 struct mptcp_subflow_context *subflow; mptcp_sched_get_retrans() local
H A Dtoken.c136 * mptcp_token_new_connect - create new key/idsn/token for subflow
153 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_token_new_connect() local
154 struct mptcp_sock *msk = mptcp_sk(subflow->conn); in mptcp_token_new_connect()
156 struct sock *sk = subflow->conn; in mptcp_token_new_connect()
160 mptcp_crypto_key_gen_sha(&subflow->local_key, &subflow->token, in mptcp_token_new_connect()
161 &subflow->idsn); in mptcp_token_new_connect()
163 bucket = token_bucket(subflow->token); in mptcp_token_new_connect()
165 if (__token_bucket_busy(bucket, subflow->token)) { in mptcp_token_new_connect()
173 ssk, subflow in mptcp_token_new_connect()
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H A Dmib.h33 MPTCP_MIB_DSSCORRUPTIONRESET, /* DSS corruption detected, MPJ subflow reset */
64 MPTCP_MIB_RMSUBFLOW, /* Remove a subflow */
75 MPTCP_MIB_SNDWNDSHARED, /* Subflow snd wnd is overridden by msk's one */
76 MPTCP_MIB_RCVWNDSHARED, /* Subflow rcv wnd is overridden by msk's one */
77 MPTCP_MIB_RCVWNDCONFLICTUPDATE, /* subflow rcv wnd is overridden by msk's one due to
78 * conflict with another subflow while updating msk rcv wnd
H A Dpm_kernel.c101 struct mptcp_subflow_context *subflow; in lookup_subflow_by_daddr() local
104 list_for_each_entry(subflow, list, node) { in lookup_subflow_by_daddr()
105 struct sock *ssk = mptcp_subflow_tcp_sock(subflow); in lookup_subflow_by_daddr()
210 struct mptcp_subflow_context *subflow; in fill_remote_addresses_fullmesh() local
217 mptcp_for_each_subflow(msk, subflow) in fill_remote_addresses_fullmesh()
218 if (READ_ONCE(subflow->local_id) == local->id) in fill_remote_addresses_fullmesh()
219 __set_bit(subflow->remote_id, unavail_id); in fill_remote_addresses_fullmesh()
221 mptcp_for_each_subflow(msk, subflow) { in fill_remote_addresses_fullmesh()
222 ssk = mptcp_subflow_tcp_sock(subflow); in fill_remote_addresses_fullmesh()
224 addrs[i].id = READ_ONCE(subflow in fill_remote_addresses_fullmesh()
298 struct mptcp_subflow_context *subflow; mptcp_mpc_endpoint_setup() local
493 struct mptcp_subflow_context *subflow; fill_local_laminar_endp() local
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H A DMakefile4 mptcp-y := protocol.o subflow.o options.o token.o crypto.o ctrl.o pm.o diag.o \
H A DKconfig10 subflows in order to utilize multiple network paths. Each subflow
H A Dsyncookies.c89 * Caller will check msk can still accept another subflow. The hmac
H A Dpm_netlink.c468 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_event_addr_announced() local
469 struct mptcp_sock *msk = mptcp_sk(subflow->conn); in mptcp_event_addr_announced()
/linux/tools/testing/selftests/net/mptcp/
H A Dmptcp_join.sh747 local flags="subflow"
753 # let the mptcp subflow be established in background before
1578 # the subflow creation
1823 local subflow="client"
1837 subflow="server"
1850 print_check "rm subflow ${subflow}"
1859 # in case of simult flush, the subflow removal count on each side is
2003 # number of all subflows, including the initial subflow.
2092 # subflow limite
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H A Dpm_netlink.sh151 add_endpoint 10.0.1.2 flags subflow dev lo
157 "2,10.0.1.2,subflow,lo" \
248 add_endpoint 10.0.1.1 flags subflow
250 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow backup")" \
253 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow")" \
260 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow fullmesh")" \
263 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow")" \
266 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow backup fullmesh")" \
H A Duserspace_pm.sh336 # ADD_ADDR from the client to server machine reusing the subflow port
346 # ADD_ADDR6 from the client to server machine reusing the subflow port
368 # ADD_ADDR from the server to client machine reusing the subflow port
376 # ADD_ADDR6 from the server to client machine reusing the subflow port
574 # Attempt to add a listener at 10.0.2.2:<subflow-port>
579 # ADD_ADDR from client to server machine reusing the subflow port
611 # Attempt to add a listener at dead:beef:2::2:<subflow-port>
616 # ADD_ADDR6 from client to server machine reusing the subflow port
690 # Attempt to add a listener at 10.0.2.1:<subflow-port>
695 # ADD_ADDR from server to client machine reusing the subflow por
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H A Dmptcp_diag.c213 printf("It's a mptcp subflow, the subflow info:\n"); in print_subflow_info()
/linux/include/trace/events/
H A Dmptcp.h26 TP_PROTO(struct mptcp_subflow_context *subflow),
28 TP_ARGS(subflow),
42 __entry->active = mptcp_subflow_active(subflow);
43 __entry->backup = subflow->backup || subflow->request_bkup;
45 if (subflow->tcp_sock && sk_fullsock(subflow->tcp_sock))
46 __entry->free = sk_stream_memory_free(subflow->tcp_sock);
50 ssk = mptcp_subflow_tcp_sock(subflow);
/linux/include/net/
H A Drstreason.h134 * This is the default error; it implies that the subflow is no
143 * is being sent to close a subflow because of an invalid response.
149 * resources to support the terminated subflow.
154 * This code indicates that the requested subflow is prohibited by
161 * that needs to be transmitted over the terminated subflow while
170 * This code indicates that the performance of this subflow was
177 * Middlebox interference has been detected over this subflow,
/linux/Documentation/networking/
H A Dmptcp.rst41 (Linux-specific), a *subflow* (or *path*) is created. This *subflow* consists of
45 *option* field of the underlying TCP *subflow*. This field contains, amongst
79 The Packet Scheduler is in charge of selecting which available *subflow(s)* to
127 values per subflow.
151 kernel is in charge of creating subflow sockets: they are TCP sockets where the
/linux/include/uapi/linux/
H A Dmptcp_pm.h29 * @MPTCP_EVENT_SUB_ESTABLISHED: A new subflow has been established. 'error'
32 * @MPTCP_EVENT_SUB_CLOSED: A subflow has been closed. An error (copy of
33 * sk_err) could be set if an error has been detected for this subflow.
36 * @MPTCP_EVENT_SUB_PRIORITY: The priority of a subflow has changed. 'error'
H A Dmptcp.h123 __u32 num_subflows; /* must be 0, set by kernel (real subflow count) */
/linux/tools/testing/selftests/bpf/prog_tests/
H A Dmptcp.c428 if (endpoint_init("subflow") < 0) in test_subflow()
563 if (endpoint_init("subflow") < 0) in test_mptcp_sockmap()
583 if (test__start_subtest("subflow")) in test_mptcp()

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