1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* AF_RXRPC internal definitions 3 * 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/atomic.h> 9 #include <linux/seqlock.h> 10 #include <linux/win_minmax.h> 11 #include <net/net_namespace.h> 12 #include <net/netns/generic.h> 13 #include <net/sock.h> 14 #include <net/af_rxrpc.h> 15 #include <keys/rxrpc-type.h> 16 #include "protocol.h" 17 18 #define FCRYPT_BSIZE 8 19 struct rxrpc_crypt { 20 union { 21 u8 x[FCRYPT_BSIZE]; 22 __be32 n[2]; 23 }; 24 } __attribute__((aligned(8))); 25 26 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 27 #define rxrpc_queue_delayed_work(WS,D) \ 28 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 29 30 struct key_preparsed_payload; 31 struct rxrpc_connection; 32 struct rxrpc_txbuf; 33 34 /* 35 * Mark applied to socket buffers in skb->mark. skb->priority is used 36 * to pass supplementary information. 37 */ 38 enum rxrpc_skb_mark { 39 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 40 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 41 }; 42 43 /* 44 * sk_state for RxRPC sockets 45 */ 46 enum { 47 RXRPC_UNBOUND = 0, 48 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 49 RXRPC_CLIENT_BOUND, /* client local address bound */ 50 RXRPC_SERVER_BOUND, /* server local address bound */ 51 RXRPC_SERVER_BOUND2, /* second server local address bound */ 52 RXRPC_SERVER_LISTENING, /* server listening for connections */ 53 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 54 RXRPC_CLOSE, /* socket is being closed */ 55 }; 56 57 /* 58 * Per-network namespace data. 59 */ 60 struct rxrpc_net { 61 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 62 u32 epoch; /* Local epoch for detecting local-end reset */ 63 struct list_head calls; /* List of calls active in this namespace */ 64 spinlock_t call_lock; /* Lock for ->calls */ 65 atomic_t nr_calls; /* Count of allocated calls */ 66 67 atomic_t nr_conns; 68 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 69 struct list_head service_conns; /* Service conns in this namespace */ 70 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 71 struct work_struct service_conn_reaper; 72 struct timer_list service_conn_reap_timer; 73 74 bool live; 75 76 bool kill_all_client_conns; 77 atomic_t nr_client_conns; 78 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 79 struct mutex client_conn_discard_lock; /* Prevent multiple discarders */ 80 struct list_head idle_client_conns; 81 struct work_struct client_conn_reaper; 82 struct timer_list client_conn_reap_timer; 83 84 struct hlist_head local_endpoints; 85 struct mutex local_mutex; /* Lock for ->local_endpoints */ 86 87 DECLARE_HASHTABLE (peer_hash, 10); 88 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 89 90 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 91 u8 peer_keepalive_cursor; 92 time64_t peer_keepalive_base; 93 struct list_head peer_keepalive[32]; 94 struct list_head peer_keepalive_new; 95 struct timer_list peer_keepalive_timer; 96 struct work_struct peer_keepalive_work; 97 98 atomic_t stat_tx_data; 99 atomic_t stat_tx_data_retrans; 100 atomic_t stat_tx_data_send; 101 atomic_t stat_tx_data_send_frag; 102 atomic_t stat_rx_data; 103 atomic_t stat_rx_data_reqack; 104 atomic_t stat_rx_data_jumbo; 105 106 atomic_t stat_tx_ack_fill; 107 atomic_t stat_tx_ack_send; 108 atomic_t stat_tx_ack_skip; 109 atomic_t stat_tx_acks[256]; 110 atomic_t stat_rx_acks[256]; 111 112 atomic_t stat_why_req_ack[8]; 113 114 atomic_t stat_io_loop; 115 }; 116 117 /* 118 * Service backlog preallocation. 119 * 120 * This contains circular buffers of preallocated peers, connections and calls 121 * for incoming service calls and their head and tail pointers. This allows 122 * calls to be set up in the data_ready handler, thereby avoiding the need to 123 * shuffle packets around so much. 124 */ 125 struct rxrpc_backlog { 126 unsigned short peer_backlog_head; 127 unsigned short peer_backlog_tail; 128 unsigned short conn_backlog_head; 129 unsigned short conn_backlog_tail; 130 unsigned short call_backlog_head; 131 unsigned short call_backlog_tail; 132 #define RXRPC_BACKLOG_MAX 32 133 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 134 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 135 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 136 }; 137 138 /* 139 * RxRPC socket definition 140 */ 141 struct rxrpc_sock { 142 /* WARNING: sk has to be the first member */ 143 struct sock sk; 144 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 145 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 146 struct rxrpc_local *local; /* local endpoint */ 147 struct rxrpc_backlog *backlog; /* Preallocation for services */ 148 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 149 struct list_head sock_calls; /* List of calls owned by this socket */ 150 struct list_head to_be_accepted; /* calls awaiting acceptance */ 151 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 152 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 153 struct key *key; /* security for this socket */ 154 struct key *securities; /* list of server security descriptors */ 155 struct rb_root calls; /* User ID -> call mapping */ 156 unsigned long flags; 157 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 158 rwlock_t call_lock; /* lock for calls */ 159 u32 min_sec_level; /* minimum security level */ 160 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 161 bool exclusive; /* Exclusive connection for a client socket */ 162 u16 second_service; /* Additional service bound to the endpoint */ 163 struct { 164 /* Service upgrade information */ 165 u16 from; /* Service ID to upgrade (if not 0) */ 166 u16 to; /* service ID to upgrade to */ 167 } service_upgrade; 168 sa_family_t family; /* Protocol family created with */ 169 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 170 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 171 }; 172 173 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 174 175 /* 176 * CPU-byteorder normalised Rx packet header. 177 */ 178 struct rxrpc_host_header { 179 u32 epoch; /* client boot timestamp */ 180 u32 cid; /* connection and channel ID */ 181 u32 callNumber; /* call ID (0 for connection-level packets) */ 182 u32 seq; /* sequence number of pkt in call stream */ 183 u32 serial; /* serial number of pkt sent to network */ 184 u8 type; /* packet type */ 185 u8 flags; /* packet flags */ 186 u8 userStatus; /* app-layer defined status */ 187 u8 securityIndex; /* security protocol ID */ 188 union { 189 u16 _rsvd; /* reserved */ 190 u16 cksum; /* kerberos security checksum */ 191 }; 192 u16 serviceId; /* service ID */ 193 } __packed; 194 195 /* 196 * RxRPC socket buffer private variables 197 * - max 48 bytes (struct sk_buff::cb) 198 */ 199 struct rxrpc_skb_priv { 200 u16 offset; /* Offset of data */ 201 u16 len; /* Length of data */ 202 u8 flags; 203 #define RXRPC_RX_VERIFIED 0x01 204 205 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 206 }; 207 208 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 209 210 /* 211 * RxRPC security module interface 212 */ 213 struct rxrpc_security { 214 const char *name; /* name of this service */ 215 u8 security_index; /* security type provided */ 216 u32 no_key_abort; /* Abort code indicating no key */ 217 218 /* Initialise a security service */ 219 int (*init)(void); 220 221 /* Clean up a security service */ 222 void (*exit)(void); 223 224 /* Parse the information from a server key */ 225 int (*preparse_server_key)(struct key_preparsed_payload *); 226 227 /* Clean up the preparse buffer after parsing a server key */ 228 void (*free_preparse_server_key)(struct key_preparsed_payload *); 229 230 /* Destroy the payload of a server key */ 231 void (*destroy_server_key)(struct key *); 232 233 /* Describe a server key */ 234 void (*describe_server_key)(const struct key *, struct seq_file *); 235 236 /* initialise a connection's security */ 237 int (*init_connection_security)(struct rxrpc_connection *, 238 struct rxrpc_key_token *); 239 240 /* Work out how much data we can store in a packet, given an estimate 241 * of the amount of data remaining. 242 */ 243 int (*how_much_data)(struct rxrpc_call *, size_t, 244 size_t *, size_t *, size_t *); 245 246 /* impose security on a packet */ 247 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *); 248 249 /* verify the security on a received packet */ 250 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *); 251 252 /* Free crypto request on a call */ 253 void (*free_call_crypto)(struct rxrpc_call *); 254 255 /* issue a challenge */ 256 int (*issue_challenge)(struct rxrpc_connection *); 257 258 /* respond to a challenge */ 259 int (*respond_to_challenge)(struct rxrpc_connection *, 260 struct sk_buff *, 261 u32 *); 262 263 /* verify a response */ 264 int (*verify_response)(struct rxrpc_connection *, 265 struct sk_buff *, 266 u32 *); 267 268 /* clear connection security */ 269 void (*clear)(struct rxrpc_connection *); 270 }; 271 272 /* 273 * RxRPC local transport endpoint description 274 * - owned by a single AF_RXRPC socket 275 * - pointed to by transport socket struct sk_user_data 276 */ 277 struct rxrpc_local { 278 struct rcu_head rcu; 279 atomic_t active_users; /* Number of users of the local endpoint */ 280 refcount_t ref; /* Number of references to the structure */ 281 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 282 struct hlist_node link; 283 struct socket *socket; /* my UDP socket */ 284 struct work_struct processor; 285 struct task_struct *io_thread; 286 struct list_head ack_tx_queue; /* List of ACKs that need sending */ 287 spinlock_t ack_tx_lock; /* ACK list lock */ 288 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 289 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 290 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 291 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 292 struct sk_buff_head rx_queue; /* Received packets */ 293 struct rb_root client_bundles; /* Client connection bundles by socket params */ 294 spinlock_t client_bundles_lock; /* Lock for client_bundles */ 295 spinlock_t lock; /* access lock */ 296 rwlock_t services_lock; /* lock for services list */ 297 int debug_id; /* debug ID for printks */ 298 bool dead; 299 bool service_closed; /* Service socket closed */ 300 struct sockaddr_rxrpc srx; /* local address */ 301 }; 302 303 /* 304 * RxRPC remote transport endpoint definition 305 * - matched by local endpoint, remote port, address and protocol type 306 */ 307 struct rxrpc_peer { 308 struct rcu_head rcu; /* This must be first */ 309 refcount_t ref; 310 unsigned long hash_key; 311 struct hlist_node hash_link; 312 struct rxrpc_local *local; 313 struct hlist_head error_targets; /* targets for net error distribution */ 314 struct rb_root service_conns; /* Service connections */ 315 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 316 time64_t last_tx_at; /* Last time packet sent here */ 317 seqlock_t service_conn_lock; 318 spinlock_t lock; /* access lock */ 319 unsigned int if_mtu; /* interface MTU for this peer */ 320 unsigned int mtu; /* network MTU for this peer */ 321 unsigned int maxdata; /* data size (MTU - hdrsize) */ 322 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 323 int debug_id; /* debug ID for printks */ 324 struct sockaddr_rxrpc srx; /* remote address */ 325 326 /* calculated RTT cache */ 327 #define RXRPC_RTT_CACHE_SIZE 32 328 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 329 ktime_t rtt_last_req; /* Time of last RTT request */ 330 unsigned int rtt_count; /* Number of samples we've got */ 331 332 u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 333 u32 mdev_us; /* medium deviation */ 334 u32 mdev_max_us; /* maximal mdev for the last rtt period */ 335 u32 rttvar_us; /* smoothed mdev_max */ 336 u32 rto_j; /* Retransmission timeout in jiffies */ 337 u8 backoff; /* Backoff timeout */ 338 339 u8 cong_ssthresh; /* Congestion slow-start threshold */ 340 }; 341 342 /* 343 * Keys for matching a connection. 344 */ 345 struct rxrpc_conn_proto { 346 union { 347 struct { 348 u32 epoch; /* epoch of this connection */ 349 u32 cid; /* connection ID */ 350 }; 351 u64 index_key; 352 }; 353 }; 354 355 struct rxrpc_conn_parameters { 356 struct rxrpc_local *local; /* Representation of local endpoint */ 357 struct rxrpc_peer *peer; /* Remote endpoint */ 358 struct key *key; /* Security details */ 359 bool exclusive; /* T if conn is exclusive */ 360 bool upgrade; /* T if service ID can be upgraded */ 361 u16 service_id; /* Service ID for this connection */ 362 u32 security_level; /* Security level selected */ 363 }; 364 365 /* 366 * Bits in the connection flags. 367 */ 368 enum rxrpc_conn_flag { 369 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 370 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 371 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 372 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 373 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 374 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 375 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 376 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 377 }; 378 379 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 380 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 381 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 382 (1UL << RXRPC_CONN_FINAL_ACK_3)) 383 384 /* 385 * Events that can be raised upon a connection. 386 */ 387 enum rxrpc_conn_event { 388 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 389 }; 390 391 /* 392 * The connection protocol state. 393 */ 394 enum rxrpc_conn_proto_state { 395 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 396 RXRPC_CONN_CLIENT, /* Client connection */ 397 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 398 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 399 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 400 RXRPC_CONN_SERVICE, /* Service secured connection */ 401 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 402 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 403 RXRPC_CONN__NR_STATES 404 }; 405 406 /* 407 * RxRPC client connection bundle. 408 */ 409 struct rxrpc_bundle { 410 struct rxrpc_local *local; /* Representation of local endpoint */ 411 struct rxrpc_peer *peer; /* Remote endpoint */ 412 struct key *key; /* Security details */ 413 refcount_t ref; 414 atomic_t active; /* Number of active users */ 415 unsigned int debug_id; 416 u32 security_level; /* Security level selected */ 417 u16 service_id; /* Service ID for this connection */ 418 bool try_upgrade; /* True if the bundle is attempting upgrade */ 419 bool alloc_conn; /* True if someone's getting a conn */ 420 bool exclusive; /* T if conn is exclusive */ 421 bool upgrade; /* T if service ID can be upgraded */ 422 short alloc_error; /* Error from last conn allocation */ 423 spinlock_t channel_lock; 424 struct rb_node local_node; /* Node in local->client_conns */ 425 struct list_head waiting_calls; /* Calls waiting for channels */ 426 unsigned long avail_chans; /* Mask of available channels */ 427 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 428 }; 429 430 /* 431 * RxRPC connection definition 432 * - matched by { local, peer, epoch, conn_id, direction } 433 * - each connection can only handle four simultaneous calls 434 */ 435 struct rxrpc_connection { 436 struct rxrpc_conn_proto proto; 437 struct rxrpc_local *local; /* Representation of local endpoint */ 438 struct rxrpc_peer *peer; /* Remote endpoint */ 439 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 440 struct key *key; /* Security details */ 441 442 refcount_t ref; 443 atomic_t active; /* Active count for service conns */ 444 struct rcu_head rcu; 445 struct list_head cache_link; 446 447 unsigned char act_chans; /* Mask of active channels */ 448 struct rxrpc_channel { 449 unsigned long final_ack_at; /* Time at which to issue final ACK */ 450 struct rxrpc_call __rcu *call; /* Active call */ 451 unsigned int call_debug_id; /* call->debug_id */ 452 u32 call_id; /* ID of current call */ 453 u32 call_counter; /* Call ID counter */ 454 u32 last_call; /* ID of last call */ 455 u8 last_type; /* Type of last packet */ 456 union { 457 u32 last_seq; 458 u32 last_abort; 459 }; 460 } channels[RXRPC_MAXCALLS]; 461 462 struct timer_list timer; /* Conn event timer */ 463 struct work_struct processor; /* connection event processor */ 464 struct work_struct destructor; /* In-process-context destroyer */ 465 struct rxrpc_bundle *bundle; /* Client connection bundle */ 466 struct rb_node service_node; /* Node in peer->service_conns */ 467 struct list_head proc_link; /* link in procfs list */ 468 struct list_head link; /* link in master connection list */ 469 struct sk_buff_head rx_queue; /* received conn-level packets */ 470 471 const struct rxrpc_security *security; /* applied security module */ 472 union { 473 struct { 474 struct crypto_sync_skcipher *cipher; /* encryption handle */ 475 struct rxrpc_crypt csum_iv; /* packet checksum base */ 476 u32 nonce; /* response re-use preventer */ 477 } rxkad; 478 }; 479 unsigned long flags; 480 unsigned long events; 481 unsigned long idle_timestamp; /* Time at which last became idle */ 482 spinlock_t state_lock; /* state-change lock */ 483 enum rxrpc_conn_proto_state state; /* current state of connection */ 484 u32 abort_code; /* Abort code of connection abort */ 485 int debug_id; /* debug ID for printks */ 486 atomic_t serial; /* packet serial number counter */ 487 unsigned int hi_serial; /* highest serial number received */ 488 u32 service_id; /* Service ID, possibly upgraded */ 489 u32 security_level; /* Security level selected */ 490 u8 security_ix; /* security type */ 491 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 492 u8 bundle_shift; /* Index into bundle->avail_chans */ 493 bool exclusive; /* T if conn is exclusive */ 494 bool upgrade; /* T if service ID can be upgraded */ 495 u16 orig_service_id; /* Originally requested service ID */ 496 short error; /* Local error code */ 497 }; 498 499 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 500 { 501 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 502 } 503 504 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 505 { 506 return !rxrpc_to_server(sp); 507 } 508 509 /* 510 * Flags in call->flags. 511 */ 512 enum rxrpc_call_flag { 513 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 514 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 515 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 516 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 517 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 518 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 519 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */ 520 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 521 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 522 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 523 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 524 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 525 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 526 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 527 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 528 RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */ 529 RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */ 530 }; 531 532 /* 533 * Events that can be raised on a call. 534 */ 535 enum rxrpc_call_event { 536 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 537 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 538 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 539 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 540 }; 541 542 /* 543 * The states that a call can be in. 544 */ 545 enum rxrpc_call_state { 546 RXRPC_CALL_UNINITIALISED, 547 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 548 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 549 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 550 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 551 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 552 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 553 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 554 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 555 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 556 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 557 RXRPC_CALL_COMPLETE, /* - call complete */ 558 NR__RXRPC_CALL_STATES 559 }; 560 561 /* 562 * Call completion condition (state == RXRPC_CALL_COMPLETE). 563 */ 564 enum rxrpc_call_completion { 565 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 566 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 567 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 568 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 569 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 570 NR__RXRPC_CALL_COMPLETIONS 571 }; 572 573 /* 574 * Call Tx congestion management modes. 575 */ 576 enum rxrpc_congest_mode { 577 RXRPC_CALL_SLOW_START, 578 RXRPC_CALL_CONGEST_AVOIDANCE, 579 RXRPC_CALL_PACKET_LOSS, 580 RXRPC_CALL_FAST_RETRANSMIT, 581 NR__RXRPC_CONGEST_MODES 582 }; 583 584 /* 585 * RxRPC call definition 586 * - matched by { connection, call_id } 587 */ 588 struct rxrpc_call { 589 struct rcu_head rcu; 590 struct rxrpc_connection *conn; /* connection carrying call */ 591 struct rxrpc_peer *peer; /* Peer record for remote address */ 592 struct rxrpc_sock __rcu *socket; /* socket responsible */ 593 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 594 const struct rxrpc_security *security; /* applied security module */ 595 struct mutex user_mutex; /* User access mutex */ 596 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ 597 unsigned long ack_lost_at; /* When ACK is figured as lost */ 598 unsigned long resend_at; /* When next resend needs to happen */ 599 unsigned long ping_at; /* When next to send a ping */ 600 unsigned long keepalive_at; /* When next to send a keepalive ping */ 601 unsigned long expect_rx_by; /* When we expect to get a packet by */ 602 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 603 unsigned long expect_term_by; /* When we expect call termination by */ 604 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 605 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 606 struct timer_list timer; /* Combined event timer */ 607 struct work_struct processor; /* Event processor */ 608 struct work_struct destroyer; /* In-process-context destroyer */ 609 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 610 struct list_head link; /* link in master call list */ 611 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 612 struct hlist_node error_link; /* link in error distribution list */ 613 struct list_head accept_link; /* Link in rx->acceptq */ 614 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 615 struct list_head sock_link; /* Link in rx->sock_calls */ 616 struct rb_node sock_node; /* Node in rx->calls */ 617 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */ 618 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 619 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 620 unsigned long user_call_ID; /* user-defined call ID */ 621 unsigned long flags; 622 unsigned long events; 623 spinlock_t notify_lock; /* Kernel notification lock */ 624 rwlock_t state_lock; /* lock for state transition */ 625 u32 abort_code; /* Local/remote abort code */ 626 int error; /* Local error incurred */ 627 enum rxrpc_call_state state; /* current state of call */ 628 enum rxrpc_call_completion completion; /* Call completion condition */ 629 refcount_t ref; 630 u16 service_id; /* service ID */ 631 u8 security_ix; /* Security type */ 632 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 633 u32 call_id; /* call ID on connection */ 634 u32 cid; /* connection ID plus channel index */ 635 int debug_id; /* debug ID for printks */ 636 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 637 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 638 639 /* Transmitted data tracking. */ 640 spinlock_t tx_lock; /* Transmit queue lock */ 641 struct list_head tx_buffer; /* Buffer of transmissible packets */ 642 rxrpc_seq_t tx_bottom; /* First packet in buffer */ 643 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */ 644 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 645 u16 tx_backoff; /* Delay to insert due to Tx failure */ 646 u8 tx_winsize; /* Maximum size of Tx window */ 647 #define RXRPC_TX_MAX_WINDOW 128 648 ktime_t tx_last_sent; /* Last time a transmission occurred */ 649 650 /* Received data tracking */ 651 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */ 652 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */ 653 654 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */ 655 rxrpc_seq_t rx_consumed; /* Highest packet consumed */ 656 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 657 u8 rx_winsize; /* Size of Rx window */ 658 spinlock_t input_lock; /* Lock for packet input to this call */ 659 660 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 661 * is fixed, we keep these numbers in terms of segments (ie. DATA 662 * packets) rather than bytes. 663 */ 664 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 665 u8 cong_cwnd; /* Congestion window size */ 666 u8 cong_extra; /* Extra to send for congestion management */ 667 u8 cong_ssthresh; /* Slow-start threshold */ 668 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 669 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 670 u8 cong_cumul_acks; /* Cumulative ACK count */ 671 ktime_t cong_tstamp; /* Last time cwnd was changed */ 672 673 /* Receive-phase ACK management (ACKs we send). */ 674 u8 ackr_reason; /* reason to ACK */ 675 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 676 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */ 677 atomic_t ackr_nr_unacked; /* Number of unacked packets */ 678 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 679 struct { 680 #define RXRPC_SACK_SIZE 256 681 /* SACK table for soft-acked packets */ 682 u8 ackr_sack_table[RXRPC_SACK_SIZE]; 683 } __aligned(8); 684 685 /* RTT management */ 686 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 687 ktime_t rtt_sent_at[4]; /* Time packet sent */ 688 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 689 * Mask of pending samples in 8-11 */ 690 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 691 #define RXRPC_CALL_RTT_PEND_SHIFT 8 692 693 /* Transmission-phase ACK management (ACKs we've received). */ 694 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 695 rxrpc_seq_t acks_first_seq; /* first sequence number received */ 696 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 697 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */ 698 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 699 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 700 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 701 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 702 struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */ 703 spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */ 704 }; 705 706 /* 707 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 708 */ 709 struct rxrpc_ack_summary { 710 u16 nr_acks; /* Number of ACKs in packet */ 711 u16 nr_new_acks; /* Number of new ACKs in packet */ 712 u16 nr_rot_new_acks; /* Number of rotated new ACKs */ 713 u8 ack_reason; 714 bool saw_nacks; /* Saw NACKs in packet */ 715 bool new_low_nack; /* T if new low NACK found */ 716 bool retrans_timeo; /* T if reTx due to timeout happened */ 717 u8 flight_size; /* Number of unreceived transmissions */ 718 /* Place to stash values for tracing */ 719 enum rxrpc_congest_mode mode:8; 720 u8 cwnd; 721 u8 ssthresh; 722 u8 dup_acks; 723 u8 cumulative_acks; 724 }; 725 726 /* 727 * sendmsg() cmsg-specified parameters. 728 */ 729 enum rxrpc_command { 730 RXRPC_CMD_SEND_DATA, /* send data message */ 731 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 732 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 733 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 734 }; 735 736 struct rxrpc_call_params { 737 s64 tx_total_len; /* Total Tx data length (if send data) */ 738 unsigned long user_call_ID; /* User's call ID */ 739 struct { 740 u32 hard; /* Maximum lifetime (sec) */ 741 u32 idle; /* Max time since last data packet (msec) */ 742 u32 normal; /* Max time since last call packet (msec) */ 743 } timeouts; 744 u8 nr_timeouts; /* Number of timeouts specified */ 745 bool kernel; /* T if kernel is making the call */ 746 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 747 }; 748 749 struct rxrpc_send_params { 750 struct rxrpc_call_params call; 751 u32 abort_code; /* Abort code to Tx (if abort) */ 752 enum rxrpc_command command : 8; /* The command to implement */ 753 bool exclusive; /* Shared or exclusive call */ 754 bool upgrade; /* If the connection is upgradeable */ 755 }; 756 757 /* 758 * Buffer of data to be output as a packet. 759 */ 760 struct rxrpc_txbuf { 761 struct rcu_head rcu; 762 struct list_head call_link; /* Link in call->tx_queue */ 763 struct list_head tx_link; /* Link in live Enc queue or Tx queue */ 764 struct rxrpc_call *call; /* Call to which belongs */ 765 ktime_t last_sent; /* Time at which last transmitted */ 766 refcount_t ref; 767 rxrpc_seq_t seq; /* Sequence number of this packet */ 768 unsigned int call_debug_id; 769 unsigned int debug_id; 770 unsigned int len; /* Amount of data in buffer */ 771 unsigned int space; /* Remaining data space */ 772 unsigned int offset; /* Offset of fill point */ 773 unsigned long flags; 774 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */ 775 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */ 776 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ 777 struct { 778 /* The packet for encrypting and DMA'ing. We align it such 779 * that data[] aligns correctly for any crypto blocksize. 780 */ 781 u8 pad[64 - sizeof(struct rxrpc_wire_header)]; 782 struct rxrpc_wire_header wire; /* Network-ready header */ 783 union { 784 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */ 785 struct { 786 struct rxrpc_ackpacket ack; 787 u8 acks[0]; 788 }; 789 }; 790 } __aligned(64); 791 }; 792 793 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) 794 { 795 return txb->wire.flags & RXRPC_CLIENT_INITIATED; 796 } 797 798 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) 799 { 800 return !rxrpc_sending_to_server(txb); 801 } 802 803 #include <trace/events/rxrpc.h> 804 805 /* 806 * af_rxrpc.c 807 */ 808 extern atomic_t rxrpc_n_rx_skbs; 809 extern struct workqueue_struct *rxrpc_workqueue; 810 811 /* 812 * call_accept.c 813 */ 814 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 815 void rxrpc_discard_prealloc(struct rxrpc_sock *); 816 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 817 struct rxrpc_sock *, 818 struct sk_buff *); 819 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 820 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 821 822 /* 823 * call_event.c 824 */ 825 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, 826 enum rxrpc_propose_ack_trace why); 827 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); 828 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, 829 enum rxrpc_propose_ack_trace); 830 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); 831 void rxrpc_process_call(struct work_struct *); 832 833 void rxrpc_reduce_call_timer(struct rxrpc_call *call, 834 unsigned long expire_at, 835 unsigned long now, 836 enum rxrpc_timer_trace why); 837 838 /* 839 * call_object.c 840 */ 841 extern const char *const rxrpc_call_states[]; 842 extern const char *const rxrpc_call_completions[]; 843 extern struct kmem_cache *rxrpc_call_jar; 844 845 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 846 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 847 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 848 struct rxrpc_conn_parameters *, 849 struct sockaddr_rxrpc *, 850 struct rxrpc_call_params *, gfp_t, 851 unsigned int); 852 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 853 struct sk_buff *); 854 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 855 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 856 void rxrpc_queue_call(struct rxrpc_call *, enum rxrpc_call_trace); 857 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace); 858 bool rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 859 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 860 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 861 void rxrpc_cleanup_call(struct rxrpc_call *); 862 void rxrpc_destroy_all_calls(struct rxrpc_net *); 863 864 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 865 { 866 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 867 } 868 869 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 870 { 871 return !rxrpc_is_service_call(call); 872 } 873 874 /* 875 * conn_client.c 876 */ 877 extern unsigned int rxrpc_reap_client_connections; 878 extern unsigned long rxrpc_conn_idle_client_expiry; 879 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 880 extern struct idr rxrpc_client_conn_ids; 881 882 void rxrpc_destroy_client_conn_ids(void); 883 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); 884 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); 885 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 886 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 887 gfp_t); 888 void rxrpc_expose_client_call(struct rxrpc_call *); 889 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 890 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); 891 void rxrpc_discard_expired_client_conns(struct work_struct *); 892 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 893 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 894 895 /* 896 * conn_event.c 897 */ 898 void rxrpc_process_connection(struct work_struct *); 899 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 900 901 /* 902 * conn_object.c 903 */ 904 extern unsigned int rxrpc_connection_expiry; 905 extern unsigned int rxrpc_closed_conn_expiry; 906 907 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t); 908 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 909 struct sk_buff *, 910 struct rxrpc_peer **); 911 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 912 void rxrpc_disconnect_call(struct rxrpc_call *); 913 void rxrpc_kill_client_conn(struct rxrpc_connection *); 914 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); 915 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); 916 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *, 917 enum rxrpc_conn_trace); 918 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *, 919 enum rxrpc_conn_trace); 920 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); 921 void rxrpc_service_connection_reaper(struct work_struct *); 922 void rxrpc_destroy_all_connections(struct rxrpc_net *); 923 924 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 925 { 926 return conn->out_clientflag; 927 } 928 929 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 930 { 931 return !rxrpc_conn_is_client(conn); 932 } 933 934 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 935 unsigned long expire_at) 936 { 937 timer_reduce(&conn->timer, expire_at); 938 } 939 940 /* 941 * conn_service.c 942 */ 943 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 944 struct sk_buff *); 945 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 946 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 947 const struct rxrpc_security *, struct sk_buff *); 948 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 949 950 /* 951 * input.c 952 */ 953 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *); 954 void rxrpc_input_implicit_end_call(struct rxrpc_sock *, struct rxrpc_connection *, 955 struct rxrpc_call *); 956 957 /* 958 * io_thread.c 959 */ 960 int rxrpc_input_packet(struct sock *, struct sk_buff *); 961 int rxrpc_io_thread(void *data); 962 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local) 963 { 964 wake_up_process(local->io_thread); 965 } 966 967 /* 968 * insecure.c 969 */ 970 extern const struct rxrpc_security rxrpc_no_security; 971 972 /* 973 * key.c 974 */ 975 extern struct key_type key_type_rxrpc; 976 977 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 978 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 979 u32); 980 981 /* 982 * local_event.c 983 */ 984 extern void rxrpc_process_local_events(struct rxrpc_local *); 985 986 /* 987 * local_object.c 988 */ 989 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 990 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace); 991 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace); 992 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace); 993 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace); 994 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace); 995 void rxrpc_queue_local(struct rxrpc_local *); 996 void rxrpc_destroy_local(struct rxrpc_local *local); 997 void rxrpc_destroy_all_locals(struct rxrpc_net *); 998 999 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local, 1000 enum rxrpc_local_trace why) 1001 { 1002 unsigned int debug_id = local->debug_id; 1003 int r, u; 1004 1005 r = refcount_read(&local->ref); 1006 u = atomic_dec_return(&local->active_users); 1007 trace_rxrpc_local(debug_id, why, r, u); 1008 return u == 0; 1009 } 1010 1011 static inline bool __rxrpc_use_local(struct rxrpc_local *local, 1012 enum rxrpc_local_trace why) 1013 { 1014 int r, u; 1015 1016 r = refcount_read(&local->ref); 1017 u = atomic_fetch_add_unless(&local->active_users, 1, 0); 1018 trace_rxrpc_local(local->debug_id, why, r, u); 1019 return u != 0; 1020 } 1021 1022 static inline void rxrpc_see_local(struct rxrpc_local *local, 1023 enum rxrpc_local_trace why) 1024 { 1025 int r, u; 1026 1027 r = refcount_read(&local->ref); 1028 u = atomic_read(&local->active_users); 1029 trace_rxrpc_local(local->debug_id, why, r, u); 1030 } 1031 1032 /* 1033 * misc.c 1034 */ 1035 extern unsigned int rxrpc_max_backlog __read_mostly; 1036 extern unsigned long rxrpc_soft_ack_delay; 1037 extern unsigned long rxrpc_idle_ack_delay; 1038 extern unsigned int rxrpc_rx_window_size; 1039 extern unsigned int rxrpc_rx_mtu; 1040 extern unsigned int rxrpc_rx_jumbo_max; 1041 1042 /* 1043 * net_ns.c 1044 */ 1045 extern unsigned int rxrpc_net_id; 1046 extern struct pernet_operations rxrpc_net_ops; 1047 1048 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1049 { 1050 return net_generic(net, rxrpc_net_id); 1051 } 1052 1053 /* 1054 * output.c 1055 */ 1056 void rxrpc_transmit_ack_packets(struct rxrpc_local *); 1057 int rxrpc_send_abort_packet(struct rxrpc_call *); 1058 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *); 1059 void rxrpc_reject_packets(struct rxrpc_local *); 1060 void rxrpc_send_keepalive(struct rxrpc_peer *); 1061 1062 /* 1063 * peer_event.c 1064 */ 1065 void rxrpc_error_report(struct sock *); 1066 void rxrpc_peer_keepalive_worker(struct work_struct *); 1067 1068 /* 1069 * peer_object.c 1070 */ 1071 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1072 const struct sockaddr_rxrpc *); 1073 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1074 struct sockaddr_rxrpc *, gfp_t); 1075 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t, 1076 enum rxrpc_peer_trace); 1077 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1078 struct rxrpc_peer *); 1079 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1080 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); 1081 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace); 1082 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); 1083 void rxrpc_put_peer_locked(struct rxrpc_peer *, enum rxrpc_peer_trace); 1084 1085 /* 1086 * proc.c 1087 */ 1088 extern const struct seq_operations rxrpc_call_seq_ops; 1089 extern const struct seq_operations rxrpc_connection_seq_ops; 1090 extern const struct seq_operations rxrpc_peer_seq_ops; 1091 extern const struct seq_operations rxrpc_local_seq_ops; 1092 1093 /* 1094 * recvmsg.c 1095 */ 1096 void rxrpc_notify_socket(struct rxrpc_call *); 1097 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1098 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1099 bool __rxrpc_call_completed(struct rxrpc_call *); 1100 bool rxrpc_call_completed(struct rxrpc_call *); 1101 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1102 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1103 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1104 1105 /* 1106 * Abort a call due to a protocol error. 1107 */ 1108 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1109 struct sk_buff *skb, 1110 const char *eproto_why, 1111 const char *why, 1112 u32 abort_code) 1113 { 1114 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1115 1116 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1117 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1118 } 1119 1120 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1121 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1122 (abort_why), (abort_code)) 1123 1124 /* 1125 * rtt.c 1126 */ 1127 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1128 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1129 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1130 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1131 1132 /* 1133 * rxkad.c 1134 */ 1135 #ifdef CONFIG_RXKAD 1136 extern const struct rxrpc_security rxkad; 1137 #endif 1138 1139 /* 1140 * security.c 1141 */ 1142 int __init rxrpc_init_security(void); 1143 const struct rxrpc_security *rxrpc_security_lookup(u8); 1144 void rxrpc_exit_security(void); 1145 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1146 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1147 struct sk_buff *); 1148 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1149 struct sk_buff *, u32, u32); 1150 1151 /* 1152 * sendmsg.c 1153 */ 1154 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1155 1156 /* 1157 * server_key.c 1158 */ 1159 extern struct key_type key_type_rxrpc_s; 1160 1161 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1162 1163 /* 1164 * skbuff.c 1165 */ 1166 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1167 void rxrpc_packet_destructor(struct sk_buff *); 1168 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1169 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1170 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1171 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1172 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1173 void rxrpc_purge_queue(struct sk_buff_head *); 1174 1175 /* 1176 * stats.c 1177 */ 1178 int rxrpc_stats_show(struct seq_file *seq, void *v); 1179 int rxrpc_stats_clear(struct file *file, char *buf, size_t size); 1180 1181 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) 1182 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) 1183 1184 /* 1185 * sysctl.c 1186 */ 1187 #ifdef CONFIG_SYSCTL 1188 extern int __init rxrpc_sysctl_init(void); 1189 extern void rxrpc_sysctl_exit(void); 1190 #else 1191 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1192 static inline void rxrpc_sysctl_exit(void) {} 1193 #endif 1194 1195 /* 1196 * txbuf.c 1197 */ 1198 extern atomic_t rxrpc_nr_txbuf; 1199 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, 1200 gfp_t gfp); 1201 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1202 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1203 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1204 1205 /* 1206 * utils.c 1207 */ 1208 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1209 1210 static inline bool before(u32 seq1, u32 seq2) 1211 { 1212 return (s32)(seq1 - seq2) < 0; 1213 } 1214 static inline bool before_eq(u32 seq1, u32 seq2) 1215 { 1216 return (s32)(seq1 - seq2) <= 0; 1217 } 1218 static inline bool after(u32 seq1, u32 seq2) 1219 { 1220 return (s32)(seq1 - seq2) > 0; 1221 } 1222 static inline bool after_eq(u32 seq1, u32 seq2) 1223 { 1224 return (s32)(seq1 - seq2) >= 0; 1225 } 1226 1227 /* 1228 * debug tracing 1229 */ 1230 extern unsigned int rxrpc_debug; 1231 1232 #define dbgprintk(FMT,...) \ 1233 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1234 1235 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1236 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1237 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1238 1239 1240 #if defined(__KDEBUG) 1241 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1242 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1243 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1244 1245 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1246 #define RXRPC_DEBUG_KENTER 0x01 1247 #define RXRPC_DEBUG_KLEAVE 0x02 1248 #define RXRPC_DEBUG_KDEBUG 0x04 1249 1250 #define _enter(FMT,...) \ 1251 do { \ 1252 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1253 kenter(FMT,##__VA_ARGS__); \ 1254 } while (0) 1255 1256 #define _leave(FMT,...) \ 1257 do { \ 1258 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1259 kleave(FMT,##__VA_ARGS__); \ 1260 } while (0) 1261 1262 #define _debug(FMT,...) \ 1263 do { \ 1264 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1265 kdebug(FMT,##__VA_ARGS__); \ 1266 } while (0) 1267 1268 #else 1269 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1270 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1271 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1272 #endif 1273 1274 /* 1275 * debug assertion checking 1276 */ 1277 #if 1 // defined(__KDEBUGALL) 1278 1279 #define ASSERT(X) \ 1280 do { \ 1281 if (unlikely(!(X))) { \ 1282 pr_err("Assertion failed\n"); \ 1283 BUG(); \ 1284 } \ 1285 } while (0) 1286 1287 #define ASSERTCMP(X, OP, Y) \ 1288 do { \ 1289 __typeof__(X) _x = (X); \ 1290 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1291 if (unlikely(!(_x OP _y))) { \ 1292 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1293 (unsigned long)_x, (unsigned long)_x, #OP, \ 1294 (unsigned long)_y, (unsigned long)_y); \ 1295 BUG(); \ 1296 } \ 1297 } while (0) 1298 1299 #define ASSERTIF(C, X) \ 1300 do { \ 1301 if (unlikely((C) && !(X))) { \ 1302 pr_err("Assertion failed\n"); \ 1303 BUG(); \ 1304 } \ 1305 } while (0) 1306 1307 #define ASSERTIFCMP(C, X, OP, Y) \ 1308 do { \ 1309 __typeof__(X) _x = (X); \ 1310 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1311 if (unlikely((C) && !(_x OP _y))) { \ 1312 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1313 (unsigned long)_x, (unsigned long)_x, #OP, \ 1314 (unsigned long)_y, (unsigned long)_y); \ 1315 BUG(); \ 1316 } \ 1317 } while (0) 1318 1319 #else 1320 1321 #define ASSERT(X) \ 1322 do { \ 1323 } while (0) 1324 1325 #define ASSERTCMP(X, OP, Y) \ 1326 do { \ 1327 } while (0) 1328 1329 #define ASSERTIF(C, X) \ 1330 do { \ 1331 } while (0) 1332 1333 #define ASSERTIFCMP(C, X, OP, Y) \ 1334 do { \ 1335 } while (0) 1336 1337 #endif /* __KDEBUGALL */ 1338