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/linux-6.14.4/net/mptcp/
Dsubflow.c346 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); in subflow_prep_synack() local
354 mptcp_fastopen_subflow_synack_set_params(subflow, req); in subflow_prep_synack()
413 static bool subflow_thmac_valid(struct mptcp_subflow_context *subflow) in subflow_thmac_valid() argument
418 subflow_generate_hmac(subflow->remote_key, subflow->local_key, in subflow_thmac_valid()
419 subflow->remote_nonce, subflow->local_nonce, in subflow_thmac_valid()
423 pr_debug("subflow=%p, token=%u, thmac=%llu, subflow->thmac=%llu\n", in subflow_thmac_valid()
424 subflow, subflow->token, thmac, subflow->thmac); in subflow_thmac_valid()
426 return thmac == subflow->thmac; in subflow_thmac_valid()
431 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_subflow_reset() local
432 struct sock *sk = subflow->conn; in mptcp_subflow_reset()
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Dprotocol.c70 struct mptcp_subflow_context *subflow; in __mptcp_socket_create() local
81 subflow = mptcp_subflow_ctx(ssock->sk); in __mptcp_socket_create()
82 list_add(&subflow->node, &msk->conn_list); in __mptcp_socket_create()
84 subflow->request_mptcp = 1; in __mptcp_socket_create()
85 subflow->subflow_id = msk->subflow_id++; in __mptcp_socket_create()
87 /* This is the first subflow, always with id 0 */ in __mptcp_socket_create()
88 WRITE_ONCE(subflow->local_id, 0); in __mptcp_socket_create()
95 /* If the MPC handshake is not started, returns the first subflow,
343 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in __mptcp_move_skb() local
353 /* try to fetch required memory from subflow */ in __mptcp_move_skb()
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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()
416 } else if (subflow->request_join) { in mptcp_syn_options()
417 pr_debug("remote_token=%u, nonce=%u\n", subflow->remote_token, in mptcp_syn_options()
418 subflow->local_nonce); in mptcp_syn_options()
420 opts->join_id = subflow->local_id; in mptcp_syn_options()
421 opts->token = subflow->remote_token; in mptcp_syn_options()
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Dprotocol.h269 u64 local_key; /* protected by the first subflow socket lock
300 bool recovery; /* closing subflow write queue reinjected */
309 u8 pending_state; /* A subflow asked to set this sk_state,
333 * ONCE annotation, the subflow outside the socket
494 /* MPTCP subflow context */
533 is_mptfo : 1, /* subflow is doing TFO */
546 u8 hmac[MPTCPOPT_HMAC_LEN]; /* MPJ subflow only */
590 mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow) in mptcp_subflow_tcp_sock() argument
592 return subflow->tcp_sock; in mptcp_subflow_tcp_sock()
596 mptcp_subflow_ctx_reset(struct mptcp_subflow_context *subflow) in mptcp_subflow_ctx_reset() argument
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Dpm.c180 const struct mptcp_subflow_context *subflow) in mptcp_pm_subflow_check_next() argument
185 update_subflows = subflow->request_join || subflow->mp_join; in mptcp_pm_subflow_check_next()
202 /* Even if this subflow is not really established, tell the PM to try in mptcp_pm_subflow_check_next()
214 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_pm_add_addr_received() local
215 struct mptcp_sock *msk = mptcp_sk(subflow->conn); in mptcp_pm_add_addr_received()
290 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_pm_mp_prio_received() local
291 struct sock *sk = subflow->conn; in mptcp_pm_mp_prio_received()
294 pr_debug("subflow->backup=%d, bkup=%d\n", subflow->backup, bkup); in mptcp_pm_mp_prio_received()
296 if (subflow->backup != bkup) in mptcp_pm_mp_prio_received()
297 subflow->backup = bkup; in mptcp_pm_mp_prio_received()
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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()
38 * space, need to offset it in the subflow sequence, see mptcp_subflow_get_map_offset() in mptcp_fastopen_subflow_synack_set_params()
41 subflow->ssn_offset += skb->len; in mptcp_fastopen_subflow_synack_set_params()
62 void __mptcp_fastopen_gen_msk_ackseq(struct mptcp_sock *msk, struct mptcp_subflow_context *subflow, in __mptcp_fastopen_gen_msk_ackseq() argument
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()
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Dsched.c138 void mptcp_subflow_set_scheduled(struct mptcp_subflow_context *subflow, in mptcp_subflow_set_scheduled() argument
141 WRITE_ONCE(subflow->scheduled, scheduled); in mptcp_subflow_set_scheduled()
146 struct mptcp_subflow_context *subflow; in mptcp_sched_get_send() local
162 mptcp_for_each_subflow(msk, subflow) { in mptcp_sched_get_send()
163 if (READ_ONCE(subflow->scheduled)) in mptcp_sched_get_send()
175 struct mptcp_subflow_context *subflow; in mptcp_sched_get_retrans() local
184 mptcp_for_each_subflow(msk, subflow) { in mptcp_sched_get_retrans()
185 if (READ_ONCE(subflow->scheduled)) in mptcp_sched_get_retrans()
Dpm_netlink.c113 struct mptcp_subflow_context *subflow; in mptcp_lookup_subflow_by_saddr() local
117 list_for_each_entry(subflow, list, node) { in mptcp_lookup_subflow_by_saddr()
118 skc = (struct sock_common *)mptcp_subflow_tcp_sock(subflow); in mptcp_lookup_subflow_by_saddr()
131 struct mptcp_subflow_context *subflow; in lookup_subflow_by_daddr() local
134 list_for_each_entry(subflow, list, node) { in lookup_subflow_by_daddr()
135 struct sock *ssk = mptcp_subflow_tcp_sock(subflow); in lookup_subflow_by_daddr()
425 struct mptcp_subflow_context *subflow; in fill_remote_addresses_vec() local
434 * corresponding to the primary MPC subflow remote address in fill_remote_addresses_vec()
452 mptcp_for_each_subflow(msk, subflow) in fill_remote_addresses_vec()
453 if (READ_ONCE(subflow->local_id) == local->id) in fill_remote_addresses_vec()
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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->local_key, subflow->token, subflow->idsn); in mptcp_token_new_connect()
175 WRITE_ONCE(msk->token, subflow->token); in mptcp_token_new_connect()
Dmib.h32 MPTCP_MIB_DSSCORRUPTIONRESET, /* DSS corruption detected, MPJ subflow reset */
63 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
Dctrl.c403 struct mptcp_subflow_context *subflow; in mptcp_active_detect_blackhole() local
408 subflow = mptcp_subflow_ctx(ssk); in mptcp_active_detect_blackhole()
410 if (subflow->request_mptcp && ssk->sk_state == TCP_SYN_SENT) { in mptcp_active_detect_blackhole()
419 subflow->mpc_drop = 1; in mptcp_active_detect_blackhole()
420 mptcp_subflow_early_fallback(mptcp_sk(subflow->conn), subflow); in mptcp_active_detect_blackhole()
423 subflow->mpc_drop = 0; in mptcp_active_detect_blackhole()
Dpm_userspace.c102 /* If the subflow is closed from the other peer (not via a
103 * subflow destroy command then), we want to keep the entry
105 * able to send RM_ADDR after the removal of the subflow.
260 struct mptcp_subflow_context *subflow; in mptcp_userspace_pm_remove_id_zero_address() local
266 mptcp_for_each_subflow(msk, subflow) { in mptcp_userspace_pm_remove_id_zero_address()
267 if (READ_ONCE(subflow->local_id) == 0) { in mptcp_userspace_pm_remove_id_zero_address()
296 /* only delete if either announced or matching a subflow */ in mptcp_pm_remove_addr_entry()
440 struct mptcp_subflow_context *subflow; in mptcp_nl_find_ssk() local
445 mptcp_for_each_subflow(msk, subflow) { in mptcp_nl_find_ssk()
449 ssk = mptcp_subflow_tcp_sock(subflow); in mptcp_nl_find_ssk()
DMakefile4 mptcp-y := protocol.o subflow.o options.o token.o crypto.o ctrl.o pm.o diag.o \
/linux-6.14.4/tools/testing/selftests/net/mptcp/
Dmptcp_join.sh717 local flags="subflow"
723 # let the mptcp subflow be established in background before
1436 # the subflow creation
1664 local subflow="client"
1678 subflow="server"
1691 print_check "rm subflow ${subflow}"
1700 # in case of simult flush, the subflow removal count on each side is
1844 # number of all subflows, including the initial subflow.
1933 # subflow limited by client
1934 if reset "single subflow, limited by client"; then
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Dpm_netlink.sh150 add_endpoint 10.0.1.2 flags subflow dev lo
156 "2,10.0.1.2,subflow,lo" \
242 add_endpoint 10.0.1.1 flags subflow
244 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow backup")" \
247 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow")" \
254 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow fullmesh")" \
257 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow")" \
260 check "show_endpoints" "$(format_endpoints "1,10.0.1.1,subflow backup fullmesh")" \
Duserspace_pm.sh299 # ADD_ADDR from the client to server machine reusing the subflow port
309 # ADD_ADDR6 from the client to server machine reusing the subflow port
331 # ADD_ADDR from the server to client machine reusing the subflow port
339 # ADD_ADDR6 from the server to client machine reusing the subflow port
537 # Attempt to add a listener at 10.0.2.2:<subflow-port>
542 # ADD_ADDR from client to server machine reusing the subflow port
574 # Attempt to add a listener at dead:beef:2::2:<subflow-port>
579 # ADD_ADDR6 from client to server machine reusing the subflow port
653 # Attempt to add a listener at 10.0.2.1:<subflow-port>
658 # ADD_ADDR from server to client machine reusing the subflow port
[all …]
/linux-6.14.4/tools/testing/selftests/bpf/progs/
Dmptcp_subflow.c14 /* Associate a subflow counter to each token */
44 /* A new subflow is added to an existing MPTCP connection */ in mptcp_subflow()
48 /* A new MPTCP connection is just initiated and this is its primary subflow */ in mptcp_subflow()
53 /* Set the mark of the subflow's socket based on appearance order */ in mptcp_subflow()
65 struct mptcp_subflow_context *subflow; in _check_getsockopt_subflow_mark() local
68 mptcp_for_each_subflow(msk, subflow) { in _check_getsockopt_subflow_mark()
71 ssk = mptcp_subflow_tcp_sock(bpf_core_cast(subflow, in _check_getsockopt_subflow_mark()
85 struct mptcp_subflow_context *subflow; in _check_getsockopt_subflow_cc() local
87 mptcp_for_each_subflow(msk, subflow) { in _check_getsockopt_subflow_cc()
91 ssk = mptcp_subflow_tcp_sock(bpf_core_cast(subflow, in _check_getsockopt_subflow_cc()
Dmptcp_bpf.h37 mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow) in mptcp_subflow_tcp_sock() argument
39 return subflow->tcp_sock; in mptcp_subflow_tcp_sock()
/linux-6.14.4/include/trace/events/
Dmptcp.h20 TP_PROTO(struct mptcp_subflow_context *subflow),
22 TP_ARGS(subflow),
36 __entry->active = mptcp_subflow_active(subflow);
37 __entry->backup = subflow->backup || subflow->request_bkup;
39 if (subflow->tcp_sock && sk_fullsock(subflow->tcp_sock))
40 __entry->free = sk_stream_memory_free(subflow->tcp_sock);
44 ssk = mptcp_subflow_tcp_sock(subflow);
/linux-6.14.4/Documentation/netlink/specs/
Dmptcp_pm.yaml58 A new subflow has been established. 'error' should not be set.
64 A subflow has been closed. An error (copy of sk_err) could be set if an
65 error has been detected for this subflow.
72 The priority of a subflow has changed. 'error' should not be set.
121 name: subflow-attribute
122 name-prefix: mptcp-subflow-attr-
377 name: subflow-create
378 doc: Create subflow
389 name: subflow-destroy
390 doc: Destroy subflow
/linux-6.14.4/include/net/
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-6.14.4/Documentation/networking/
Dmptcp-sysctl.rst22 by the initial subflow if the value is 1. This controls a flag that is
59 unchanged for such time, after the last subflow removal, before
77 socket. In-kernel path management will control subflow
80 API. Userspace path management puts per-MPTCP-connection subflow
102 pending outstanding data on a given subflow required to declare it stale.
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-6.14.4/include/uapi/linux/
Dmptcp_pm.h28 * @MPTCP_EVENT_SUB_ESTABLISHED: A new subflow has been established. 'error'
31 * @MPTCP_EVENT_SUB_CLOSED: A subflow has been closed. An error (copy of
32 * sk_err) could be set if an error has been detected for this subflow.
35 * @MPTCP_EVENT_SUB_PRIORITY: The priority of a subflow has changed. 'error'

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