1 /* AF_RXRPC internal definitions 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/atomic.h> 13 #include <linux/seqlock.h> 14 #include <net/sock.h> 15 #include <net/af_rxrpc.h> 16 #include <rxrpc/packet.h> 17 18 #if 0 19 #define CHECK_SLAB_OKAY(X) \ 20 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 21 (POISON_FREE << 8 | POISON_FREE)) 22 #else 23 #define CHECK_SLAB_OKAY(X) do {} while (0) 24 #endif 25 26 #define FCRYPT_BSIZE 8 27 struct rxrpc_crypt { 28 union { 29 u8 x[FCRYPT_BSIZE]; 30 __be32 n[2]; 31 }; 32 } __attribute__((aligned(8))); 33 34 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 35 #define rxrpc_queue_delayed_work(WS,D) \ 36 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 37 38 #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) 39 40 struct rxrpc_connection; 41 42 /* 43 * sk_state for RxRPC sockets 44 */ 45 enum { 46 RXRPC_UNBOUND = 0, 47 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 48 RXRPC_CLIENT_BOUND, /* client local address bound */ 49 RXRPC_SERVER_BOUND, /* server local address bound */ 50 RXRPC_SERVER_LISTENING, /* server listening for connections */ 51 RXRPC_CLOSE, /* socket is being closed */ 52 }; 53 54 /* 55 * RxRPC socket definition 56 */ 57 struct rxrpc_sock { 58 /* WARNING: sk has to be the first member */ 59 struct sock sk; 60 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */ 61 struct rxrpc_local *local; /* local endpoint */ 62 struct list_head listen_link; /* link in the local endpoint's listen list */ 63 struct list_head secureq; /* calls awaiting connection security clearance */ 64 struct list_head acceptq; /* calls awaiting acceptance */ 65 struct key *key; /* security for this socket */ 66 struct key *securities; /* list of server security descriptors */ 67 struct rb_root calls; /* outstanding calls on this socket */ 68 unsigned long flags; 69 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 70 rwlock_t call_lock; /* lock for calls */ 71 u32 min_sec_level; /* minimum security level */ 72 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 73 bool exclusive; /* Exclusive connection for a client socket */ 74 sa_family_t family; /* Protocol family created with */ 75 struct sockaddr_rxrpc srx; /* local address */ 76 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 77 }; 78 79 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 80 81 /* 82 * CPU-byteorder normalised Rx packet header. 83 */ 84 struct rxrpc_host_header { 85 u32 epoch; /* client boot timestamp */ 86 u32 cid; /* connection and channel ID */ 87 u32 callNumber; /* call ID (0 for connection-level packets) */ 88 u32 seq; /* sequence number of pkt in call stream */ 89 u32 serial; /* serial number of pkt sent to network */ 90 u8 type; /* packet type */ 91 u8 flags; /* packet flags */ 92 u8 userStatus; /* app-layer defined status */ 93 u8 securityIndex; /* security protocol ID */ 94 union { 95 u16 _rsvd; /* reserved */ 96 u16 cksum; /* kerberos security checksum */ 97 }; 98 u16 serviceId; /* service ID */ 99 } __packed; 100 101 /* 102 * RxRPC socket buffer private variables 103 * - max 48 bytes (struct sk_buff::cb) 104 */ 105 struct rxrpc_skb_priv { 106 struct rxrpc_call *call; /* call with which associated */ 107 unsigned long resend_at; /* time in jiffies at which to resend */ 108 union { 109 unsigned int offset; /* offset into buffer of next read */ 110 int remain; /* amount of space remaining for next write */ 111 u32 error; /* network error code */ 112 bool need_resend; /* T if needs resending */ 113 }; 114 115 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 116 }; 117 118 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 119 120 enum rxrpc_command { 121 RXRPC_CMD_SEND_DATA, /* send data message */ 122 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 123 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 124 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 125 }; 126 127 /* 128 * RxRPC security module interface 129 */ 130 struct rxrpc_security { 131 const char *name; /* name of this service */ 132 u8 security_index; /* security type provided */ 133 134 /* Initialise a security service */ 135 int (*init)(void); 136 137 /* Clean up a security service */ 138 void (*exit)(void); 139 140 /* initialise a connection's security */ 141 int (*init_connection_security)(struct rxrpc_connection *); 142 143 /* prime a connection's packet security */ 144 int (*prime_packet_security)(struct rxrpc_connection *); 145 146 /* impose security on a packet */ 147 int (*secure_packet)(struct rxrpc_call *, 148 struct sk_buff *, 149 size_t, 150 void *); 151 152 /* verify the security on a received packet */ 153 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *); 154 155 /* issue a challenge */ 156 int (*issue_challenge)(struct rxrpc_connection *); 157 158 /* respond to a challenge */ 159 int (*respond_to_challenge)(struct rxrpc_connection *, 160 struct sk_buff *, 161 u32 *); 162 163 /* verify a response */ 164 int (*verify_response)(struct rxrpc_connection *, 165 struct sk_buff *, 166 u32 *); 167 168 /* clear connection security */ 169 void (*clear)(struct rxrpc_connection *); 170 }; 171 172 /* 173 * RxRPC local transport endpoint description 174 * - owned by a single AF_RXRPC socket 175 * - pointed to by transport socket struct sk_user_data 176 */ 177 struct rxrpc_local { 178 struct rcu_head rcu; 179 atomic_t usage; 180 struct list_head link; 181 struct socket *socket; /* my UDP socket */ 182 struct work_struct processor; 183 struct list_head services; /* services listening on this endpoint */ 184 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 185 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 186 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 187 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 188 struct rb_root client_conns; /* Client connections by socket params */ 189 spinlock_t client_conns_lock; /* Lock for client_conns */ 190 spinlock_t lock; /* access lock */ 191 rwlock_t services_lock; /* lock for services list */ 192 int debug_id; /* debug ID for printks */ 193 bool dead; 194 struct sockaddr_rxrpc srx; /* local address */ 195 }; 196 197 /* 198 * RxRPC remote transport endpoint definition 199 * - matched by local endpoint, remote port, address and protocol type 200 */ 201 struct rxrpc_peer { 202 struct rcu_head rcu; /* This must be first */ 203 atomic_t usage; 204 unsigned long hash_key; 205 struct hlist_node hash_link; 206 struct rxrpc_local *local; 207 struct hlist_head error_targets; /* targets for net error distribution */ 208 struct work_struct error_distributor; 209 struct rb_root service_conns; /* Service connections */ 210 seqlock_t service_conn_lock; 211 spinlock_t lock; /* access lock */ 212 unsigned int if_mtu; /* interface MTU for this peer */ 213 unsigned int mtu; /* network MTU for this peer */ 214 unsigned int maxdata; /* data size (MTU - hdrsize) */ 215 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 216 int debug_id; /* debug ID for printks */ 217 int error_report; /* Net (+0) or local (+1000000) to distribute */ 218 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 219 struct sockaddr_rxrpc srx; /* remote address */ 220 221 /* calculated RTT cache */ 222 #define RXRPC_RTT_CACHE_SIZE 32 223 suseconds_t rtt; /* current RTT estimate (in uS) */ 224 unsigned int rtt_point; /* next entry at which to insert */ 225 unsigned int rtt_usage; /* amount of cache actually used */ 226 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 227 }; 228 229 /* 230 * Keys for matching a connection. 231 */ 232 struct rxrpc_conn_proto { 233 union { 234 struct { 235 u32 epoch; /* epoch of this connection */ 236 u32 cid; /* connection ID */ 237 }; 238 u64 index_key; 239 }; 240 }; 241 242 struct rxrpc_conn_parameters { 243 struct rxrpc_local *local; /* Representation of local endpoint */ 244 struct rxrpc_peer *peer; /* Remote endpoint */ 245 struct key *key; /* Security details */ 246 bool exclusive; /* T if conn is exclusive */ 247 u16 service_id; /* Service ID for this connection */ 248 u32 security_level; /* Security level selected */ 249 }; 250 251 /* 252 * Bits in the connection flags. 253 */ 254 enum rxrpc_conn_flag { 255 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 256 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 257 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 258 }; 259 260 /* 261 * Events that can be raised upon a connection. 262 */ 263 enum rxrpc_conn_event { 264 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 265 }; 266 267 /* 268 * The connection protocol state. 269 */ 270 enum rxrpc_conn_proto_state { 271 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 272 RXRPC_CONN_CLIENT, /* Client connection */ 273 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 274 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 275 RXRPC_CONN_SERVICE, /* Service secured connection */ 276 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 277 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 278 RXRPC_CONN_NETWORK_ERROR, /* Conn terminated by network error */ 279 RXRPC_CONN__NR_STATES 280 }; 281 282 /* 283 * RxRPC connection definition 284 * - matched by { local, peer, epoch, conn_id, direction } 285 * - each connection can only handle four simultaneous calls 286 */ 287 struct rxrpc_connection { 288 struct rxrpc_conn_proto proto; 289 struct rxrpc_conn_parameters params; 290 291 spinlock_t channel_lock; 292 293 struct rxrpc_channel { 294 struct rxrpc_call __rcu *call; /* Active call */ 295 u32 call_id; /* ID of current call */ 296 u32 call_counter; /* Call ID counter */ 297 u32 last_call; /* ID of last call */ 298 u32 last_result; /* Result of last call (0/abort) */ 299 } channels[RXRPC_MAXCALLS]; 300 wait_queue_head_t channel_wq; /* queue to wait for channel to become available */ 301 302 struct rcu_head rcu; 303 struct work_struct processor; /* connection event processor */ 304 union { 305 struct rb_node client_node; /* Node in local->client_conns */ 306 struct rb_node service_node; /* Node in peer->service_conns */ 307 }; 308 struct list_head link; /* link in master connection list */ 309 struct sk_buff_head rx_queue; /* received conn-level packets */ 310 const struct rxrpc_security *security; /* applied security module */ 311 struct key *server_key; /* security for this service */ 312 struct crypto_skcipher *cipher; /* encryption handle */ 313 struct rxrpc_crypt csum_iv; /* packet checksum base */ 314 unsigned long flags; 315 unsigned long events; 316 unsigned long put_time; /* Time at which last put */ 317 spinlock_t state_lock; /* state-change lock */ 318 atomic_t usage; 319 enum rxrpc_conn_proto_state state : 8; /* current state of connection */ 320 u32 local_abort; /* local abort code */ 321 u32 remote_abort; /* remote abort code */ 322 int error; /* local error incurred */ 323 int debug_id; /* debug ID for printks */ 324 atomic_t serial; /* packet serial number counter */ 325 atomic_t hi_serial; /* highest serial number received */ 326 atomic_t avail_chans; /* number of channels available */ 327 u8 size_align; /* data size alignment (for security) */ 328 u8 header_size; /* rxrpc + security header size */ 329 u8 security_size; /* security header size */ 330 u32 security_nonce; /* response re-use preventer */ 331 u8 security_ix; /* security type */ 332 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 333 }; 334 335 /* 336 * Flags in call->flags. 337 */ 338 enum rxrpc_call_flag { 339 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 340 RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ 341 RXRPC_CALL_RCVD_LAST, /* all packets received */ 342 RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ 343 RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ 344 RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ 345 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 346 RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ 347 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 348 }; 349 350 /* 351 * Events that can be raised on a call. 352 */ 353 enum rxrpc_call_event { 354 RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ 355 RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ 356 RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ 357 RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ 358 RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ 359 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 360 RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ 361 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 362 RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ 363 RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ 364 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 365 RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ 366 RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ 367 RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ 368 RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ 369 RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ 370 RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ 371 }; 372 373 /* 374 * The states that a call can be in. 375 */ 376 enum rxrpc_call_state { 377 RXRPC_CALL_UNINITIALISED, 378 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 379 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 380 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 381 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 382 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 383 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 384 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 385 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 386 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 387 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 388 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 389 RXRPC_CALL_COMPLETE, /* - call completed */ 390 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 391 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 392 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 393 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 394 RXRPC_CALL_DEAD, /* - call is dead */ 395 NR__RXRPC_CALL_STATES 396 }; 397 398 /* 399 * RxRPC call definition 400 * - matched by { connection, call_id } 401 */ 402 struct rxrpc_call { 403 struct rcu_head rcu; 404 struct rxrpc_connection *conn; /* connection carrying call */ 405 struct rxrpc_sock *socket; /* socket responsible */ 406 struct timer_list lifetimer; /* lifetime remaining on call */ 407 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 408 struct timer_list ack_timer; /* ACK generation timer */ 409 struct timer_list resend_timer; /* Tx resend timer */ 410 struct work_struct destroyer; /* call destroyer */ 411 struct work_struct processor; /* packet processor and ACK generator */ 412 struct list_head link; /* link in master call list */ 413 struct hlist_node error_link; /* link in error distribution list */ 414 struct list_head accept_link; /* calls awaiting acceptance */ 415 struct rb_node sock_node; /* node in socket call tree */ 416 struct sk_buff_head rx_queue; /* received packets */ 417 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 418 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 419 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 420 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 421 unsigned long user_call_ID; /* user-defined call ID */ 422 unsigned long creation_jif; /* time of call creation */ 423 unsigned long flags; 424 unsigned long events; 425 spinlock_t lock; 426 rwlock_t state_lock; /* lock for state transition */ 427 atomic_t usage; 428 atomic_t skb_count; /* Outstanding packets on this call */ 429 atomic_t sequence; /* Tx data packet sequence counter */ 430 u32 local_abort; /* local abort code */ 431 u32 remote_abort; /* remote abort code */ 432 int error_report; /* Network error (ICMP/local transport) */ 433 int error; /* Local error incurred */ 434 enum rxrpc_call_state state : 8; /* current state of call */ 435 u16 service_id; /* service ID */ 436 u32 call_id; /* call ID on connection */ 437 u32 cid; /* connection ID plus channel index */ 438 int debug_id; /* debug ID for printks */ 439 440 /* transmission-phase ACK management */ 441 u8 acks_head; /* offset into window of first entry */ 442 u8 acks_tail; /* offset into window of last entry */ 443 u8 acks_winsz; /* size of un-ACK'd window */ 444 u8 acks_unacked; /* lowest unacked packet in last ACK received */ 445 int acks_latest; /* serial number of latest ACK received */ 446 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 447 unsigned long *acks_window; /* sent packet window 448 * - elements are pointers with LSB set if ACK'd 449 */ 450 451 /* receive-phase ACK management */ 452 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 453 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 454 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 455 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 456 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 457 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 458 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 459 u8 ackr_reason; /* reason to ACK */ 460 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 461 atomic_t ackr_not_idle; /* number of packets in Rx queue */ 462 463 /* received packet records, 1 bit per record */ 464 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 465 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 466 }; 467 468 /* 469 * locally abort an RxRPC call 470 */ 471 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 472 { 473 write_lock_bh(&call->state_lock); 474 if (call->state < RXRPC_CALL_COMPLETE) { 475 call->local_abort = abort_code; 476 call->state = RXRPC_CALL_LOCALLY_ABORTED; 477 set_bit(RXRPC_CALL_EV_ABORT, &call->events); 478 } 479 write_unlock_bh(&call->state_lock); 480 } 481 482 #include <trace/events/rxrpc.h> 483 484 /* 485 * af_rxrpc.c 486 */ 487 extern atomic_t rxrpc_n_skbs; 488 extern u32 rxrpc_epoch; 489 extern atomic_t rxrpc_debug_id; 490 extern struct workqueue_struct *rxrpc_workqueue; 491 492 /* 493 * call_accept.c 494 */ 495 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 496 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 497 int rxrpc_reject_call(struct rxrpc_sock *); 498 499 /* 500 * call_event.c 501 */ 502 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 503 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 504 void rxrpc_process_call(struct work_struct *); 505 506 /* 507 * call_object.c 508 */ 509 extern unsigned int rxrpc_max_call_lifetime; 510 extern unsigned int rxrpc_dead_call_expiry; 511 extern struct kmem_cache *rxrpc_call_jar; 512 extern struct list_head rxrpc_calls; 513 extern rwlock_t rxrpc_call_lock; 514 515 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 516 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 517 struct rxrpc_conn_parameters *, 518 struct sockaddr_rxrpc *, 519 unsigned long, gfp_t); 520 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 521 struct rxrpc_connection *, 522 struct sk_buff *); 523 void rxrpc_release_call(struct rxrpc_call *); 524 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 525 void __rxrpc_put_call(struct rxrpc_call *); 526 void __exit rxrpc_destroy_all_calls(void); 527 528 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 529 { 530 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 531 } 532 533 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 534 { 535 return !rxrpc_is_service_call(call); 536 } 537 538 /* 539 * conn_client.c 540 */ 541 extern struct idr rxrpc_client_conn_ids; 542 543 void rxrpc_destroy_client_conn_ids(void); 544 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 545 struct sockaddr_rxrpc *, gfp_t); 546 void rxrpc_unpublish_client_conn(struct rxrpc_connection *); 547 548 /* 549 * conn_event.c 550 */ 551 void rxrpc_process_connection(struct work_struct *); 552 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 553 void rxrpc_reject_packets(struct rxrpc_local *); 554 555 /* 556 * conn_object.c 557 */ 558 extern unsigned int rxrpc_connection_expiry; 559 extern struct list_head rxrpc_connections; 560 extern rwlock_t rxrpc_connection_lock; 561 562 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 563 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 564 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 565 struct sk_buff *); 566 void __rxrpc_disconnect_call(struct rxrpc_call *); 567 void rxrpc_disconnect_call(struct rxrpc_call *); 568 void rxrpc_put_connection(struct rxrpc_connection *); 569 void __exit rxrpc_destroy_all_connections(void); 570 571 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 572 { 573 return conn->out_clientflag; 574 } 575 576 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 577 { 578 return !rxrpc_conn_is_client(conn); 579 } 580 581 static inline void rxrpc_get_connection(struct rxrpc_connection *conn) 582 { 583 atomic_inc(&conn->usage); 584 } 585 586 static inline 587 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) 588 { 589 return atomic_inc_not_zero(&conn->usage) ? conn : NULL; 590 } 591 592 static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) 593 { 594 if (!rxrpc_get_connection_maybe(conn)) 595 return false; 596 if (!rxrpc_queue_work(&conn->processor)) 597 rxrpc_put_connection(conn); 598 return true; 599 } 600 601 /* 602 * conn_service.c 603 */ 604 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 605 struct sk_buff *); 606 struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, 607 struct sockaddr_rxrpc *, 608 struct sk_buff *); 609 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 610 611 /* 612 * input.c 613 */ 614 void rxrpc_data_ready(struct sock *); 615 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); 616 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 617 618 /* 619 * insecure.c 620 */ 621 extern const struct rxrpc_security rxrpc_no_security; 622 623 /* 624 * key.c 625 */ 626 extern struct key_type key_type_rxrpc; 627 extern struct key_type key_type_rxrpc_s; 628 629 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 630 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 631 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 632 u32); 633 634 /* 635 * local_event.c 636 */ 637 extern void rxrpc_process_local_events(struct rxrpc_local *); 638 639 /* 640 * local_object.c 641 */ 642 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); 643 void __rxrpc_put_local(struct rxrpc_local *); 644 void __exit rxrpc_destroy_all_locals(void); 645 646 static inline void rxrpc_get_local(struct rxrpc_local *local) 647 { 648 atomic_inc(&local->usage); 649 } 650 651 static inline 652 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 653 { 654 return atomic_inc_not_zero(&local->usage) ? local : NULL; 655 } 656 657 static inline void rxrpc_put_local(struct rxrpc_local *local) 658 { 659 if (local && atomic_dec_and_test(&local->usage)) 660 __rxrpc_put_local(local); 661 } 662 663 static inline void rxrpc_queue_local(struct rxrpc_local *local) 664 { 665 rxrpc_queue_work(&local->processor); 666 } 667 668 /* 669 * misc.c 670 */ 671 extern unsigned int rxrpc_max_backlog __read_mostly; 672 extern unsigned int rxrpc_requested_ack_delay; 673 extern unsigned int rxrpc_soft_ack_delay; 674 extern unsigned int rxrpc_idle_ack_delay; 675 extern unsigned int rxrpc_rx_window_size; 676 extern unsigned int rxrpc_rx_mtu; 677 extern unsigned int rxrpc_rx_jumbo_max; 678 679 extern const char *const rxrpc_pkts[]; 680 extern const s8 rxrpc_ack_priority[]; 681 682 extern const char *rxrpc_acks(u8 reason); 683 684 /* 685 * output.c 686 */ 687 extern unsigned int rxrpc_resend_timeout; 688 689 int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); 690 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 691 692 /* 693 * peer_event.c 694 */ 695 void rxrpc_error_report(struct sock *); 696 void rxrpc_peer_error_distributor(struct work_struct *); 697 698 /* 699 * peer_object.c 700 */ 701 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 702 const struct sockaddr_rxrpc *); 703 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 704 struct sockaddr_rxrpc *, gfp_t); 705 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 706 707 static inline void rxrpc_get_peer(struct rxrpc_peer *peer) 708 { 709 atomic_inc(&peer->usage); 710 } 711 712 static inline 713 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 714 { 715 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 716 } 717 718 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 719 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 720 { 721 if (peer && atomic_dec_and_test(&peer->usage)) 722 __rxrpc_put_peer(peer); 723 } 724 725 /* 726 * proc.c 727 */ 728 extern const char *const rxrpc_call_states[]; 729 extern const struct file_operations rxrpc_call_seq_fops; 730 extern const struct file_operations rxrpc_connection_seq_fops; 731 732 /* 733 * recvmsg.c 734 */ 735 void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 736 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 737 738 /* 739 * rxkad.c 740 */ 741 #ifdef CONFIG_RXKAD 742 extern const struct rxrpc_security rxkad; 743 #endif 744 745 /* 746 * security.c 747 */ 748 int __init rxrpc_init_security(void); 749 void rxrpc_exit_security(void); 750 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 751 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 752 753 /* 754 * skbuff.c 755 */ 756 void rxrpc_packet_destructor(struct sk_buff *); 757 void rxrpc_new_skb(struct sk_buff *); 758 void rxrpc_see_skb(struct sk_buff *); 759 void rxrpc_get_skb(struct sk_buff *); 760 void rxrpc_free_skb(struct sk_buff *); 761 void rxrpc_purge_queue(struct sk_buff_head *); 762 763 /* 764 * sysctl.c 765 */ 766 #ifdef CONFIG_SYSCTL 767 extern int __init rxrpc_sysctl_init(void); 768 extern void rxrpc_sysctl_exit(void); 769 #else 770 static inline int __init rxrpc_sysctl_init(void) { return 0; } 771 static inline void rxrpc_sysctl_exit(void) {} 772 #endif 773 774 /* 775 * utils.c 776 */ 777 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 778 779 /* 780 * debug tracing 781 */ 782 extern unsigned int rxrpc_debug; 783 784 #define dbgprintk(FMT,...) \ 785 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 786 787 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 788 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 789 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 790 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 791 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 792 793 794 #if defined(__KDEBUG) 795 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 796 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 797 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 798 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 799 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 800 801 #elif defined(CONFIG_AF_RXRPC_DEBUG) 802 #define RXRPC_DEBUG_KENTER 0x01 803 #define RXRPC_DEBUG_KLEAVE 0x02 804 #define RXRPC_DEBUG_KDEBUG 0x04 805 #define RXRPC_DEBUG_KPROTO 0x08 806 #define RXRPC_DEBUG_KNET 0x10 807 808 #define _enter(FMT,...) \ 809 do { \ 810 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 811 kenter(FMT,##__VA_ARGS__); \ 812 } while (0) 813 814 #define _leave(FMT,...) \ 815 do { \ 816 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 817 kleave(FMT,##__VA_ARGS__); \ 818 } while (0) 819 820 #define _debug(FMT,...) \ 821 do { \ 822 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 823 kdebug(FMT,##__VA_ARGS__); \ 824 } while (0) 825 826 #define _proto(FMT,...) \ 827 do { \ 828 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 829 kproto(FMT,##__VA_ARGS__); \ 830 } while (0) 831 832 #define _net(FMT,...) \ 833 do { \ 834 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 835 knet(FMT,##__VA_ARGS__); \ 836 } while (0) 837 838 #else 839 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 840 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 841 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 842 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 843 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 844 #endif 845 846 /* 847 * debug assertion checking 848 */ 849 #if 1 // defined(__KDEBUGALL) 850 851 #define ASSERT(X) \ 852 do { \ 853 if (unlikely(!(X))) { \ 854 pr_err("Assertion failed\n"); \ 855 BUG(); \ 856 } \ 857 } while (0) 858 859 #define ASSERTCMP(X, OP, Y) \ 860 do { \ 861 unsigned long _x = (unsigned long)(X); \ 862 unsigned long _y = (unsigned long)(Y); \ 863 if (unlikely(!(_x OP _y))) { \ 864 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 865 _x, _x, #OP, _y, _y); \ 866 BUG(); \ 867 } \ 868 } while (0) 869 870 #define ASSERTIF(C, X) \ 871 do { \ 872 if (unlikely((C) && !(X))) { \ 873 pr_err("Assertion failed\n"); \ 874 BUG(); \ 875 } \ 876 } while (0) 877 878 #define ASSERTIFCMP(C, X, OP, Y) \ 879 do { \ 880 unsigned long _x = (unsigned long)(X); \ 881 unsigned long _y = (unsigned long)(Y); \ 882 if (unlikely((C) && !(_x OP _y))) { \ 883 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 884 _x, _x, #OP, _y, _y); \ 885 BUG(); \ 886 } \ 887 } while (0) 888 889 #else 890 891 #define ASSERT(X) \ 892 do { \ 893 } while (0) 894 895 #define ASSERTCMP(X, OP, Y) \ 896 do { \ 897 } while (0) 898 899 #define ASSERTIF(C, X) \ 900 do { \ 901 } while (0) 902 903 #define ASSERTIFCMP(C, X, OP, Y) \ 904 do { \ 905 } while (0) 906 907 #endif /* __KDEBUGALL */ 908 909 910 #define rxrpc_get_call(CALL) \ 911 do { \ 912 CHECK_SLAB_OKAY(&(CALL)->usage); \ 913 if (atomic_inc_return(&(CALL)->usage) == 1) \ 914 BUG(); \ 915 } while (0) 916 917 #define rxrpc_put_call(CALL) \ 918 do { \ 919 __rxrpc_put_call(CALL); \ 920 } while (0) 921