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_PROC_BUSY, /* the processor is busy */ 345 RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ 346 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 347 RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ 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 sequence; /* Tx data packet sequence counter */ 429 u32 local_abort; /* local abort code */ 430 u32 remote_abort; /* remote abort code */ 431 int error_report; /* Network error (ICMP/local transport) */ 432 int error; /* Local error incurred */ 433 enum rxrpc_call_state state : 8; /* current state of call */ 434 int debug_id; /* debug ID for printks */ 435 u8 channel; /* connection channel occupied by this call */ 436 437 /* transmission-phase ACK management */ 438 u8 acks_head; /* offset into window of first entry */ 439 u8 acks_tail; /* offset into window of last entry */ 440 u8 acks_winsz; /* size of un-ACK'd window */ 441 u8 acks_unacked; /* lowest unacked packet in last ACK received */ 442 int acks_latest; /* serial number of latest ACK received */ 443 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 444 unsigned long *acks_window; /* sent packet window 445 * - elements are pointers with LSB set if ACK'd 446 */ 447 448 /* receive-phase ACK management */ 449 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 450 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 451 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 452 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 453 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 454 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 455 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 456 u8 ackr_reason; /* reason to ACK */ 457 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 458 atomic_t ackr_not_idle; /* number of packets in Rx queue */ 459 460 /* received packet records, 1 bit per record */ 461 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 462 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 463 464 u8 in_clientflag; /* Copy of conn->in_clientflag */ 465 struct rxrpc_local *local; /* Local endpoint. */ 466 u32 call_id; /* call ID on connection */ 467 u32 cid; /* connection ID plus channel index */ 468 u32 epoch; /* epoch of this connection */ 469 u16 service_id; /* service ID */ 470 }; 471 472 /* 473 * locally abort an RxRPC call 474 */ 475 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 476 { 477 write_lock_bh(&call->state_lock); 478 if (call->state < RXRPC_CALL_COMPLETE) { 479 call->local_abort = abort_code; 480 call->state = RXRPC_CALL_LOCALLY_ABORTED; 481 set_bit(RXRPC_CALL_EV_ABORT, &call->events); 482 } 483 write_unlock_bh(&call->state_lock); 484 } 485 486 /* 487 * af_rxrpc.c 488 */ 489 extern atomic_t rxrpc_n_skbs; 490 extern u32 rxrpc_epoch; 491 extern atomic_t rxrpc_debug_id; 492 extern struct workqueue_struct *rxrpc_workqueue; 493 494 /* 495 * call_accept.c 496 */ 497 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 498 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 499 int rxrpc_reject_call(struct rxrpc_sock *); 500 501 /* 502 * call_event.c 503 */ 504 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 505 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 506 void rxrpc_process_call(struct work_struct *); 507 508 /* 509 * call_object.c 510 */ 511 extern unsigned int rxrpc_max_call_lifetime; 512 extern unsigned int rxrpc_dead_call_expiry; 513 extern struct kmem_cache *rxrpc_call_jar; 514 extern struct list_head rxrpc_calls; 515 extern rwlock_t rxrpc_call_lock; 516 517 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 518 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 519 struct rxrpc_conn_parameters *, 520 struct sockaddr_rxrpc *, 521 unsigned long, gfp_t); 522 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 523 struct rxrpc_connection *, 524 struct sk_buff *); 525 void rxrpc_release_call(struct rxrpc_call *); 526 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 527 void __rxrpc_put_call(struct rxrpc_call *); 528 void __exit rxrpc_destroy_all_calls(void); 529 530 /* 531 * conn_client.c 532 */ 533 extern struct idr rxrpc_client_conn_ids; 534 535 void rxrpc_destroy_client_conn_ids(void); 536 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 537 struct sockaddr_rxrpc *, gfp_t); 538 void rxrpc_unpublish_client_conn(struct rxrpc_connection *); 539 540 /* 541 * conn_event.c 542 */ 543 void rxrpc_process_connection(struct work_struct *); 544 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 545 void rxrpc_reject_packets(struct rxrpc_local *); 546 547 /* 548 * conn_object.c 549 */ 550 extern unsigned int rxrpc_connection_expiry; 551 extern struct list_head rxrpc_connections; 552 extern rwlock_t rxrpc_connection_lock; 553 554 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 555 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 556 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 557 struct sk_buff *); 558 void __rxrpc_disconnect_call(struct rxrpc_call *); 559 void rxrpc_disconnect_call(struct rxrpc_call *); 560 void rxrpc_put_connection(struct rxrpc_connection *); 561 void __exit rxrpc_destroy_all_connections(void); 562 563 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 564 { 565 return conn->out_clientflag; 566 } 567 568 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 569 { 570 return !rxrpc_conn_is_client(conn); 571 } 572 573 static inline void rxrpc_get_connection(struct rxrpc_connection *conn) 574 { 575 atomic_inc(&conn->usage); 576 } 577 578 static inline 579 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) 580 { 581 return atomic_inc_not_zero(&conn->usage) ? conn : NULL; 582 } 583 584 static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) 585 { 586 if (!rxrpc_get_connection_maybe(conn)) 587 return false; 588 if (!rxrpc_queue_work(&conn->processor)) 589 rxrpc_put_connection(conn); 590 return true; 591 } 592 593 /* 594 * conn_service.c 595 */ 596 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 597 struct sk_buff *); 598 struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, 599 struct sockaddr_rxrpc *, 600 struct sk_buff *); 601 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 602 603 /* 604 * input.c 605 */ 606 void rxrpc_data_ready(struct sock *); 607 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); 608 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 609 610 /* 611 * insecure.c 612 */ 613 extern const struct rxrpc_security rxrpc_no_security; 614 615 /* 616 * key.c 617 */ 618 extern struct key_type key_type_rxrpc; 619 extern struct key_type key_type_rxrpc_s; 620 621 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 622 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 623 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 624 u32); 625 626 /* 627 * local_event.c 628 */ 629 extern void rxrpc_process_local_events(struct rxrpc_local *); 630 631 /* 632 * local_object.c 633 */ 634 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); 635 void __rxrpc_put_local(struct rxrpc_local *); 636 void __exit rxrpc_destroy_all_locals(void); 637 638 static inline void rxrpc_get_local(struct rxrpc_local *local) 639 { 640 atomic_inc(&local->usage); 641 } 642 643 static inline 644 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 645 { 646 return atomic_inc_not_zero(&local->usage) ? local : NULL; 647 } 648 649 static inline void rxrpc_put_local(struct rxrpc_local *local) 650 { 651 if (local && atomic_dec_and_test(&local->usage)) 652 __rxrpc_put_local(local); 653 } 654 655 static inline void rxrpc_queue_local(struct rxrpc_local *local) 656 { 657 rxrpc_queue_work(&local->processor); 658 } 659 660 /* 661 * misc.c 662 */ 663 extern unsigned int rxrpc_max_backlog __read_mostly; 664 extern unsigned int rxrpc_requested_ack_delay; 665 extern unsigned int rxrpc_soft_ack_delay; 666 extern unsigned int rxrpc_idle_ack_delay; 667 extern unsigned int rxrpc_rx_window_size; 668 extern unsigned int rxrpc_rx_mtu; 669 extern unsigned int rxrpc_rx_jumbo_max; 670 671 extern const char *const rxrpc_pkts[]; 672 extern const s8 rxrpc_ack_priority[]; 673 674 extern const char *rxrpc_acks(u8 reason); 675 676 /* 677 * output.c 678 */ 679 extern unsigned int rxrpc_resend_timeout; 680 681 int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); 682 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 683 684 /* 685 * peer_event.c 686 */ 687 void rxrpc_error_report(struct sock *); 688 void rxrpc_peer_error_distributor(struct work_struct *); 689 690 /* 691 * peer_object.c 692 */ 693 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 694 const struct sockaddr_rxrpc *); 695 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 696 struct sockaddr_rxrpc *, gfp_t); 697 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 698 699 static inline void rxrpc_get_peer(struct rxrpc_peer *peer) 700 { 701 atomic_inc(&peer->usage); 702 } 703 704 static inline 705 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 706 { 707 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 708 } 709 710 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 711 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 712 { 713 if (peer && atomic_dec_and_test(&peer->usage)) 714 __rxrpc_put_peer(peer); 715 } 716 717 /* 718 * proc.c 719 */ 720 extern const char *const rxrpc_call_states[]; 721 extern const struct file_operations rxrpc_call_seq_fops; 722 extern const struct file_operations rxrpc_connection_seq_fops; 723 724 /* 725 * recvmsg.c 726 */ 727 void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 728 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 729 730 /* 731 * rxkad.c 732 */ 733 #ifdef CONFIG_RXKAD 734 extern const struct rxrpc_security rxkad; 735 #endif 736 737 /* 738 * security.c 739 */ 740 int __init rxrpc_init_security(void); 741 void rxrpc_exit_security(void); 742 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 743 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 744 745 /* 746 * skbuff.c 747 */ 748 void rxrpc_packet_destructor(struct sk_buff *); 749 750 /* 751 * sysctl.c 752 */ 753 #ifdef CONFIG_SYSCTL 754 extern int __init rxrpc_sysctl_init(void); 755 extern void rxrpc_sysctl_exit(void); 756 #else 757 static inline int __init rxrpc_sysctl_init(void) { return 0; } 758 static inline void rxrpc_sysctl_exit(void) {} 759 #endif 760 761 /* 762 * utils.c 763 */ 764 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 765 766 /* 767 * debug tracing 768 */ 769 extern unsigned int rxrpc_debug; 770 771 #define dbgprintk(FMT,...) \ 772 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 773 774 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 775 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 776 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 777 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 778 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 779 780 781 #if defined(__KDEBUG) 782 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 783 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 784 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 785 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 786 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 787 788 #elif defined(CONFIG_AF_RXRPC_DEBUG) 789 #define RXRPC_DEBUG_KENTER 0x01 790 #define RXRPC_DEBUG_KLEAVE 0x02 791 #define RXRPC_DEBUG_KDEBUG 0x04 792 #define RXRPC_DEBUG_KPROTO 0x08 793 #define RXRPC_DEBUG_KNET 0x10 794 795 #define _enter(FMT,...) \ 796 do { \ 797 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 798 kenter(FMT,##__VA_ARGS__); \ 799 } while (0) 800 801 #define _leave(FMT,...) \ 802 do { \ 803 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 804 kleave(FMT,##__VA_ARGS__); \ 805 } while (0) 806 807 #define _debug(FMT,...) \ 808 do { \ 809 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 810 kdebug(FMT,##__VA_ARGS__); \ 811 } while (0) 812 813 #define _proto(FMT,...) \ 814 do { \ 815 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 816 kproto(FMT,##__VA_ARGS__); \ 817 } while (0) 818 819 #define _net(FMT,...) \ 820 do { \ 821 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 822 knet(FMT,##__VA_ARGS__); \ 823 } while (0) 824 825 #else 826 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 827 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 828 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 829 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 830 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 831 #endif 832 833 /* 834 * debug assertion checking 835 */ 836 #if 1 // defined(__KDEBUGALL) 837 838 #define ASSERT(X) \ 839 do { \ 840 if (unlikely(!(X))) { \ 841 pr_err("Assertion failed\n"); \ 842 BUG(); \ 843 } \ 844 } while (0) 845 846 #define ASSERTCMP(X, OP, Y) \ 847 do { \ 848 unsigned long _x = (unsigned long)(X); \ 849 unsigned long _y = (unsigned long)(Y); \ 850 if (unlikely(!(_x OP _y))) { \ 851 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 852 _x, _x, #OP, _y, _y); \ 853 BUG(); \ 854 } \ 855 } while (0) 856 857 #define ASSERTIF(C, X) \ 858 do { \ 859 if (unlikely((C) && !(X))) { \ 860 pr_err("Assertion failed\n"); \ 861 BUG(); \ 862 } \ 863 } while (0) 864 865 #define ASSERTIFCMP(C, X, OP, Y) \ 866 do { \ 867 unsigned long _x = (unsigned long)(X); \ 868 unsigned long _y = (unsigned long)(Y); \ 869 if (unlikely((C) && !(_x OP _y))) { \ 870 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 871 _x, _x, #OP, _y, _y); \ 872 BUG(); \ 873 } \ 874 } while (0) 875 876 #else 877 878 #define ASSERT(X) \ 879 do { \ 880 } while (0) 881 882 #define ASSERTCMP(X, OP, Y) \ 883 do { \ 884 } while (0) 885 886 #define ASSERTIF(C, X) \ 887 do { \ 888 } while (0) 889 890 #define ASSERTIFCMP(C, X, OP, Y) \ 891 do { \ 892 } while (0) 893 894 #endif /* __KDEBUGALL */ 895 896 /* 897 * socket buffer accounting / leak finding 898 */ 899 static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) 900 { 901 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 902 //atomic_inc(&rxrpc_n_skbs); 903 } 904 905 #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) 906 907 static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) 908 { 909 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 910 //atomic_dec(&rxrpc_n_skbs); 911 } 912 913 #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) 914 915 static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) 916 { 917 if (skb) { 918 CHECK_SLAB_OKAY(&skb->users); 919 //_net("free skb %p %s [%d]", 920 // skb, fn, atomic_read(&rxrpc_n_skbs)); 921 //atomic_dec(&rxrpc_n_skbs); 922 kfree_skb(skb); 923 } 924 } 925 926 #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) 927 928 static inline void rxrpc_purge_queue(struct sk_buff_head *list) 929 { 930 struct sk_buff *skb; 931 while ((skb = skb_dequeue((list))) != NULL) 932 rxrpc_free_skb(skb); 933 } 934 935 #define rxrpc_get_call(CALL) \ 936 do { \ 937 CHECK_SLAB_OKAY(&(CALL)->usage); \ 938 if (atomic_inc_return(&(CALL)->usage) == 1) \ 939 BUG(); \ 940 } while (0) 941 942 #define rxrpc_put_call(CALL) \ 943 do { \ 944 __rxrpc_put_call(CALL); \ 945 } while (0) 946