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/linux-6.8/net/mptcp/
Dsubflow.c314 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); in subflow_prep_synack() local
322 mptcp_fastopen_subflow_synack_set_params(subflow, req); in subflow_prep_synack()
379 static bool subflow_thmac_valid(struct mptcp_subflow_context *subflow) in subflow_thmac_valid() argument
384 subflow_generate_hmac(subflow->remote_key, subflow->local_key, in subflow_thmac_valid()
385 subflow->remote_nonce, subflow->local_nonce, in subflow_thmac_valid()
389 pr_debug("subflow=%p, token=%u, thmac=%llu, subflow->thmac=%llu\n", in subflow_thmac_valid()
390 subflow, subflow->token, thmac, subflow->thmac); in subflow_thmac_valid()
392 return thmac == subflow->thmac; in subflow_thmac_valid()
397 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_subflow_reset() local
398 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,
342 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in __mptcp_move_skb() local
352 /* 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()
407 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); in mptcp_syn_options() local
412 subflow->snd_isn = TCP_SKB_CB(skb)->end_seq; in mptcp_syn_options()
413 if (subflow->request_mptcp) { in mptcp_syn_options()
419 } else if (subflow->request_join) { in mptcp_syn_options()
420 pr_debug("remote_token=%u, nonce=%u", subflow->remote_token, in mptcp_syn_options()
421 subflow->local_nonce); in mptcp_syn_options()
423 opts->join_id = subflow->local_id; in mptcp_syn_options()
424 opts->token = subflow->remote_token; in mptcp_syn_options()
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Dprotocol.h289 bool recovery; /* closing subflow write queue reinjected */
298 u8 pending_state; /* A subflow asked to set this sk_state,
318 * ONCE annotation, the subflow outside the socket
455 /* MPTCP subflow context */
495 is_mptfo : 1, /* subflow is doing TFO */
504 u8 hmac[MPTCPOPT_HMAC_LEN]; /* MPJ subflow only */
548 mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow) in mptcp_subflow_tcp_sock() argument
550 return subflow->tcp_sock; in mptcp_subflow_tcp_sock()
554 mptcp_subflow_ctx_reset(struct mptcp_subflow_context *subflow) in mptcp_subflow_ctx_reset() argument
556 memset(&subflow->reset, 0, sizeof(subflow->reset)); in mptcp_subflow_ctx_reset()
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Dpm.c188 const struct mptcp_subflow_context *subflow) in mptcp_pm_subflow_check_next() argument
193 update_subflows = subflow->request_join || subflow->mp_join; in mptcp_pm_subflow_check_next()
210 /* Even if this subflow is not really established, tell the PM to try in mptcp_pm_subflow_check_next()
222 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_pm_add_addr_received() local
223 struct mptcp_sock *msk = mptcp_sk(subflow->conn); in mptcp_pm_add_addr_received()
296 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_pm_mp_prio_received() local
297 struct sock *sk = subflow->conn; in mptcp_pm_mp_prio_received()
300 pr_debug("subflow->backup=%d, bkup=%d\n", subflow->backup, bkup); in mptcp_pm_mp_prio_received()
302 if (subflow->backup != bkup) in mptcp_pm_mp_prio_received()
303 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()
212 struct mptcp_subflow_context *subflow; in mptcp_setsockopt_sol_socket_timestamping() local
238 mptcp_for_each_subflow(msk, subflow) { in mptcp_setsockopt_sol_socket_timestamping()
239 struct sock *ssk = mptcp_subflow_tcp_sock(subflow); in mptcp_setsockopt_sol_socket_timestamping()
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Dsched.c118 void mptcp_subflow_set_scheduled(struct mptcp_subflow_context *subflow, in mptcp_subflow_set_scheduled() argument
121 WRITE_ONCE(subflow->scheduled, scheduled); in mptcp_subflow_set_scheduled()
126 struct mptcp_subflow_context *subflow; in mptcp_sched_get_send() local
142 mptcp_for_each_subflow(msk, subflow) { in mptcp_sched_get_send()
143 if (READ_ONCE(subflow->scheduled)) in mptcp_sched_get_send()
155 struct mptcp_subflow_context *subflow; in mptcp_sched_get_retrans() local
164 mptcp_for_each_subflow(msk, subflow) { in mptcp_sched_get_retrans()
165 if (READ_ONCE(subflow->scheduled)) in mptcp_sched_get_retrans()
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()
Dpm_netlink.c118 struct mptcp_subflow_context *subflow; in lookup_subflow_by_saddr() local
122 list_for_each_entry(subflow, list, node) { in lookup_subflow_by_saddr()
123 skc = (struct sock_common *)mptcp_subflow_tcp_sock(subflow); in lookup_subflow_by_saddr()
136 struct mptcp_subflow_context *subflow; in lookup_subflow_by_daddr() local
140 list_for_each_entry(subflow, list, node) { in lookup_subflow_by_daddr()
141 skc = (struct sock_common *)mptcp_subflow_tcp_sock(subflow); in lookup_subflow_by_daddr()
409 struct mptcp_subflow_context *subflow; in fill_remote_addresses_vec() local
418 * corresponding to the primary MPC subflow remote address in fill_remote_addresses_vec()
436 mptcp_for_each_subflow(msk, subflow) in fill_remote_addresses_vec()
437 if (READ_ONCE(subflow->local_id) == local->id) in fill_remote_addresses_vec()
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Dpm_userspace.c84 /* If the subflow is closed from the other peer (not via a
85 * subflow destroy command then), we want to keep the entry
87 * able to send RM_ADDR after the removal of the subflow.
230 struct mptcp_subflow_context *subflow; in mptcp_userspace_pm_remove_id_zero_address() local
236 mptcp_for_each_subflow(msk, subflow) { in mptcp_userspace_pm_remove_id_zero_address()
237 if (READ_ONCE(subflow->local_id) == 0) { in mptcp_userspace_pm_remove_id_zero_address()
410 struct mptcp_subflow_context *subflow; in mptcp_nl_find_ssk() local
415 mptcp_for_each_subflow(msk, subflow) { in mptcp_nl_find_ssk()
419 ssk = mptcp_subflow_tcp_sock(subflow); in mptcp_nl_find_ssk()
523 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); in mptcp_pm_nl_subflow_destroy_doit() local
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Dmib.h50 MPTCP_MIB_RMSUBFLOW, /* Remove a subflow */
62 MPTCP_MIB_SNDWNDSHARED, /* Subflow snd wnd is overridden by msk's one */
63 MPTCP_MIB_RCVWNDSHARED, /* Subflow rcv wnd is overridden by msk's one */
64 MPTCP_MIB_RCVWNDCONFLICTUPDATE, /* subflow rcv wnd is overridden by msk's one due to
65 * conflict with another subflow while updating msk rcv wnd
DMakefile4 mptcp-y := protocol.o subflow.o options.o token.o crypto.o ctrl.o pm.o diag.o \
DKconfig10 subflows in order to utilize multiple network paths. Each subflow
Dsyncookies.c89 * Caller will check msk can still accept another subflow. The hmac
/linux-6.8/tools/testing/selftests/net/mptcp/
Dmptcp_join.sh833 local flags="subflow"
839 # let the mptcp subflow be established in background before
1496 # the subflow creation
1745 # in case of simult flush, the subflow removal count on each side is
1867 # number of all subflows, including the initial subflow.
1956 # subflow limited by client
1957 if reset "single subflow, limited by client"; then
1960 pm_nl_add_endpoint $ns2 10.0.3.2 flags subflow
1965 # subflow limited by server
1966 if reset "single subflow, limited by server"; then
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Dpm_netlink.sh87 ip netns exec $ns1 ./pm_nl_ctl add 10.0.1.2 flags subflow dev lo
93 id 2 flags subflow dev lo 10.0.1.2
177 ip netns exec $ns1 ./pm_nl_ctl add 10.0.1.1 flags subflow
180 subflow,backup 10.0.1.1" "set flags (backup)"
183 subflow 10.0.1.1" " (nobackup)"
190 subflow,fullmesh 10.0.1.1" " (fullmesh)"
193 subflow 10.0.1.1" " (nofullmesh)"
196 subflow,backup,fullmesh 10.0.1.1" " (backup,fullmesh)"
Duserspace_pm.sh357 # ADD_ADDR from the client to server machine reusing the subflow port
367 # ADD_ADDR6 from the client to server machine reusing the subflow port
389 # ADD_ADDR from the server to client machine reusing the subflow port
397 # ADD_ADDR6 from the server to client machine reusing the subflow port
589 # Attempt to add a listener at 10.0.2.2:<subflow-port>
594 # ADD_ADDR from client to server machine reusing the subflow port
626 # Attempt to add a listener at dead:beef:2::2:<subflow-port>
631 # ADD_ADDR6 from client to server machine reusing the subflow port
705 # Attempt to add a listener at 10.0.2.1:<subflow-port>
710 # ADD_ADDR from server to client machine reusing the subflow port
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Dsimult_flows.sh91 ip netns exec "$ns1" ./pm_nl_ctl add 10.0.2.1 dev ns1eth2 flags subflow
Dpm_nl_ctl.c35 fprintf(stderr, "\tadd [flags signal|subflow|backup|fullmesh] [id <nr>] [dev <name>] <ip>\n"); in syntax()
45 fprintf(stderr, "\tlimits [<rcv addr max> <subflow max>]\n"); in syntax()
813 if (!strcmp(tok, "subflow")) in add_addr()
999 printf("subflow"); in print_addr()
/linux-6.8/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;
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-6.8/Documentation/networking/
Dmptcp-sysctl.rst31 unchanged for such time, after the last subflow removal, before
49 by the initial subflow if the value is 1. This controls a flag that is
62 socket. In-kernel path management will control subflow
65 API. Userspace path management puts per-MPTCP-connection subflow
79 pending outstanding data on a given subflow required to declare it stale.
/linux-6.8/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.
120 name: subflow-attribute
121 name-prefix: mptcp-subflow-attr-
376 name: subflow-create
388 name: subflow-destroy
/linux-6.8/include/uapi/linux/
Dmptcp_pm.h28 * subflow has been established. 'error' should not be set.
30 * daddr4 | daddr6, sport, dport, backup, if_idx [, error] A subflow has been
32 * detected for this subflow.
35 * subflow has changed. 'error' should not be set.
Dmptcp.h105 __u32 num_subflows; /* must be 0, set by kernel (real subflow count) */

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