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 <net/sock.h> 13 #include <rxrpc/packet.h> 14 15 #if 0 16 #define CHECK_SLAB_OKAY(X) \ 17 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 18 (POISON_FREE << 8 | POISON_FREE)) 19 #else 20 #define CHECK_SLAB_OKAY(X) do {} while (0) 21 #endif 22 23 #define FCRYPT_BSIZE 8 24 struct rxrpc_crypt { 25 union { 26 u8 x[FCRYPT_BSIZE]; 27 __be32 n[2]; 28 }; 29 } __attribute__((aligned(8))); 30 31 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 32 #define rxrpc_queue_delayed_work(WS,D) \ 33 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 34 35 #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) 36 #define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor) 37 38 /* 39 * sk_state for RxRPC sockets 40 */ 41 enum { 42 RXRPC_UNCONNECTED = 0, 43 RXRPC_CLIENT_BOUND, /* client local address bound */ 44 RXRPC_CLIENT_CONNECTED, /* client is connected */ 45 RXRPC_SERVER_BOUND, /* server local address bound */ 46 RXRPC_SERVER_LISTENING, /* server listening for connections */ 47 RXRPC_CLOSE, /* socket is being closed */ 48 }; 49 50 /* 51 * RxRPC socket definition 52 */ 53 struct rxrpc_sock { 54 /* WARNING: sk has to be the first member */ 55 struct sock sk; 56 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */ 57 struct rxrpc_local *local; /* local endpoint */ 58 struct rxrpc_transport *trans; /* transport handler */ 59 struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */ 60 struct rxrpc_connection *conn; /* exclusive virtual connection */ 61 struct list_head listen_link; /* link in the local endpoint's listen list */ 62 struct list_head secureq; /* calls awaiting connection security clearance */ 63 struct list_head acceptq; /* calls awaiting acceptance */ 64 struct key *key; /* security for this socket */ 65 struct key *securities; /* list of server security descriptors */ 66 struct rb_root calls; /* outstanding calls on this socket */ 67 unsigned long flags; 68 #define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */ 69 rwlock_t call_lock; /* lock for calls */ 70 u32 min_sec_level; /* minimum security level */ 71 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 72 struct sockaddr_rxrpc srx; /* local address */ 73 sa_family_t proto; /* protocol created with */ 74 }; 75 76 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 77 78 /* 79 * CPU-byteorder normalised Rx packet header. 80 */ 81 struct rxrpc_host_header { 82 u32 epoch; /* client boot timestamp */ 83 u32 cid; /* connection and channel ID */ 84 u32 callNumber; /* call ID (0 for connection-level packets) */ 85 u32 seq; /* sequence number of pkt in call stream */ 86 u32 serial; /* serial number of pkt sent to network */ 87 u8 type; /* packet type */ 88 u8 flags; /* packet flags */ 89 u8 userStatus; /* app-layer defined status */ 90 u8 securityIndex; /* security protocol ID */ 91 union { 92 u16 _rsvd; /* reserved */ 93 u16 cksum; /* kerberos security checksum */ 94 }; 95 u16 serviceId; /* service ID */ 96 } __packed; 97 98 /* 99 * RxRPC socket buffer private variables 100 * - max 48 bytes (struct sk_buff::cb) 101 */ 102 struct rxrpc_skb_priv { 103 struct rxrpc_call *call; /* call with which associated */ 104 unsigned long resend_at; /* time in jiffies at which to resend */ 105 union { 106 unsigned int offset; /* offset into buffer of next read */ 107 int remain; /* amount of space remaining for next write */ 108 u32 error; /* network error code */ 109 bool need_resend; /* T if needs resending */ 110 }; 111 112 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 113 }; 114 115 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 116 117 enum rxrpc_command { 118 RXRPC_CMD_SEND_DATA, /* send data message */ 119 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 120 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 121 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 122 }; 123 124 /* 125 * RxRPC security module interface 126 */ 127 struct rxrpc_security { 128 const char *name; /* name of this service */ 129 u8 security_index; /* security type provided */ 130 131 /* Initialise a security service */ 132 int (*init)(void); 133 134 /* Clean up a security service */ 135 void (*exit)(void); 136 137 /* initialise a connection's security */ 138 int (*init_connection_security)(struct rxrpc_connection *); 139 140 /* prime a connection's packet security */ 141 void (*prime_packet_security)(struct rxrpc_connection *); 142 143 /* impose security on a packet */ 144 int (*secure_packet)(const struct rxrpc_call *, 145 struct sk_buff *, 146 size_t, 147 void *); 148 149 /* verify the security on a received packet */ 150 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, 151 u32 *); 152 153 /* issue a challenge */ 154 int (*issue_challenge)(struct rxrpc_connection *); 155 156 /* respond to a challenge */ 157 int (*respond_to_challenge)(struct rxrpc_connection *, 158 struct sk_buff *, 159 u32 *); 160 161 /* verify a response */ 162 int (*verify_response)(struct rxrpc_connection *, 163 struct sk_buff *, 164 u32 *); 165 166 /* clear connection security */ 167 void (*clear)(struct rxrpc_connection *); 168 }; 169 170 /* 171 * RxRPC local transport endpoint definition 172 * - matched by local port, address and protocol type 173 */ 174 struct rxrpc_local { 175 struct socket *socket; /* my UDP socket */ 176 struct work_struct destroyer; /* endpoint destroyer */ 177 struct work_struct acceptor; /* incoming call processor */ 178 struct work_struct rejecter; /* packet reject writer */ 179 struct work_struct event_processor; /* endpoint event processor */ 180 struct list_head services; /* services listening on this endpoint */ 181 struct list_head link; /* link in endpoint list */ 182 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 183 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 184 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 185 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 186 spinlock_t lock; /* access lock */ 187 rwlock_t services_lock; /* lock for services list */ 188 atomic_t usage; 189 int debug_id; /* debug ID for printks */ 190 volatile char error_rcvd; /* T if received ICMP error outstanding */ 191 struct sockaddr_rxrpc srx; /* local address */ 192 }; 193 194 /* 195 * RxRPC remote transport endpoint definition 196 * - matched by remote port, address and protocol type 197 * - holds the connection ID counter for connections between the two endpoints 198 */ 199 struct rxrpc_peer { 200 struct work_struct destroyer; /* peer destroyer */ 201 struct list_head link; /* link in master peer list */ 202 struct list_head error_targets; /* targets for net error distribution */ 203 spinlock_t lock; /* access lock */ 204 atomic_t usage; 205 unsigned int if_mtu; /* interface MTU for this peer */ 206 unsigned int mtu; /* network MTU for this peer */ 207 unsigned int maxdata; /* data size (MTU - hdrsize) */ 208 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 209 int debug_id; /* debug ID for printks */ 210 int net_error; /* network error distributed */ 211 struct sockaddr_rxrpc srx; /* remote address */ 212 213 /* calculated RTT cache */ 214 #define RXRPC_RTT_CACHE_SIZE 32 215 suseconds_t rtt; /* current RTT estimate (in uS) */ 216 unsigned int rtt_point; /* next entry at which to insert */ 217 unsigned int rtt_usage; /* amount of cache actually used */ 218 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 219 }; 220 221 /* 222 * RxRPC point-to-point transport / connection manager definition 223 * - handles a bundle of connections between two endpoints 224 * - matched by { local, peer } 225 */ 226 struct rxrpc_transport { 227 struct rxrpc_local *local; /* local transport endpoint */ 228 struct rxrpc_peer *peer; /* remote transport endpoint */ 229 struct work_struct error_handler; /* network error distributor */ 230 struct rb_root bundles; /* client connection bundles on this transport */ 231 struct rb_root client_conns; /* client connections on this transport */ 232 struct rb_root server_conns; /* server connections on this transport */ 233 struct list_head link; /* link in master session list */ 234 struct sk_buff_head error_queue; /* error packets awaiting processing */ 235 unsigned long put_time; /* time at which to reap */ 236 spinlock_t client_lock; /* client connection allocation lock */ 237 rwlock_t conn_lock; /* lock for active/dead connections */ 238 atomic_t usage; 239 int debug_id; /* debug ID for printks */ 240 unsigned int conn_idcounter; /* connection ID counter (client) */ 241 }; 242 243 /* 244 * RxRPC client connection bundle 245 * - matched by { transport, service_id, key } 246 */ 247 struct rxrpc_conn_bundle { 248 struct rb_node node; /* node in transport's lookup tree */ 249 struct list_head unused_conns; /* unused connections in this bundle */ 250 struct list_head avail_conns; /* available connections in this bundle */ 251 struct list_head busy_conns; /* busy connections in this bundle */ 252 struct key *key; /* security for this bundle */ 253 wait_queue_head_t chanwait; /* wait for channel to become available */ 254 atomic_t usage; 255 int debug_id; /* debug ID for printks */ 256 unsigned short num_conns; /* number of connections in this bundle */ 257 u16 service_id; /* Service ID for this bundle */ 258 u8 security_ix; /* security type */ 259 }; 260 261 /* 262 * RxRPC connection definition 263 * - matched by { transport, service_id, conn_id, direction, key } 264 * - each connection can only handle four simultaneous calls 265 */ 266 struct rxrpc_connection { 267 struct rxrpc_transport *trans; /* transport session */ 268 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ 269 struct work_struct processor; /* connection event processor */ 270 struct rb_node node; /* node in transport's lookup tree */ 271 struct list_head link; /* link in master connection list */ 272 struct list_head bundle_link; /* link in bundle */ 273 struct rb_root calls; /* calls on this connection */ 274 struct sk_buff_head rx_queue; /* received conn-level packets */ 275 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ 276 const struct rxrpc_security *security; /* applied security module */ 277 struct key *key; /* security for this connection (client) */ 278 struct key *server_key; /* security for this service */ 279 struct crypto_skcipher *cipher; /* encryption handle */ 280 struct rxrpc_crypt csum_iv; /* packet checksum base */ 281 unsigned long events; 282 #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ 283 unsigned long put_time; /* time at which to reap */ 284 rwlock_t lock; /* access lock */ 285 spinlock_t state_lock; /* state-change lock */ 286 atomic_t usage; 287 enum { /* current state of connection */ 288 RXRPC_CONN_UNUSED, /* - connection not yet attempted */ 289 RXRPC_CONN_CLIENT, /* - client connection */ 290 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ 291 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ 292 RXRPC_CONN_SERVER, /* - server secured connection */ 293 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ 294 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ 295 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ 296 } state; 297 u32 local_abort; /* local abort code */ 298 u32 remote_abort; /* remote abort code */ 299 int error; /* local error incurred */ 300 int debug_id; /* debug ID for printks */ 301 unsigned int call_counter; /* call ID counter */ 302 atomic_t serial; /* packet serial number counter */ 303 atomic_t hi_serial; /* highest serial number received */ 304 u8 avail_calls; /* number of calls available */ 305 u8 size_align; /* data size alignment (for security) */ 306 u8 header_size; /* rxrpc + security header size */ 307 u8 security_size; /* security header size */ 308 u32 security_level; /* security level negotiated */ 309 u32 security_nonce; /* response re-use preventer */ 310 u32 epoch; /* epoch of this connection */ 311 u32 cid; /* connection ID */ 312 u16 service_id; /* service ID for this connection */ 313 u8 security_ix; /* security type */ 314 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ 315 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 316 }; 317 318 /* 319 * Flags in call->flags. 320 */ 321 enum rxrpc_call_flag { 322 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 323 RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ 324 RXRPC_CALL_RCVD_LAST, /* all packets received */ 325 RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ 326 RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ 327 RXRPC_CALL_PROC_BUSY, /* the processor is busy */ 328 RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ 329 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 330 RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ 331 }; 332 333 /* 334 * Events that can be raised on a call. 335 */ 336 enum rxrpc_call_event { 337 RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ 338 RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ 339 RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ 340 RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ 341 RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ 342 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 343 RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ 344 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 345 RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ 346 RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ 347 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 348 RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ 349 RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ 350 RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ 351 RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ 352 RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ 353 RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ 354 }; 355 356 /* 357 * The states that a call can be in. 358 */ 359 enum rxrpc_call_state { 360 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 361 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 362 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 363 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 364 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 365 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 366 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 367 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 368 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 369 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 370 RXRPC_CALL_COMPLETE, /* - call completed */ 371 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 372 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 373 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 374 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 375 RXRPC_CALL_DEAD, /* - call is dead */ 376 NR__RXRPC_CALL_STATES 377 }; 378 379 /* 380 * RxRPC call definition 381 * - matched by { connection, call_id } 382 */ 383 struct rxrpc_call { 384 struct rxrpc_connection *conn; /* connection carrying call */ 385 struct rxrpc_sock *socket; /* socket responsible */ 386 struct timer_list lifetimer; /* lifetime remaining on call */ 387 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 388 struct timer_list ack_timer; /* ACK generation timer */ 389 struct timer_list resend_timer; /* Tx resend timer */ 390 struct work_struct destroyer; /* call destroyer */ 391 struct work_struct processor; /* packet processor and ACK generator */ 392 struct list_head link; /* link in master call list */ 393 struct list_head error_link; /* link in error distribution list */ 394 struct list_head accept_link; /* calls awaiting acceptance */ 395 struct rb_node sock_node; /* node in socket call tree */ 396 struct rb_node conn_node; /* node in connection call tree */ 397 struct sk_buff_head rx_queue; /* received packets */ 398 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 399 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 400 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 401 unsigned long user_call_ID; /* user-defined call ID */ 402 unsigned long creation_jif; /* time of call creation */ 403 unsigned long flags; 404 unsigned long events; 405 spinlock_t lock; 406 rwlock_t state_lock; /* lock for state transition */ 407 atomic_t usage; 408 atomic_t sequence; /* Tx data packet sequence counter */ 409 u32 local_abort; /* local abort code */ 410 u32 remote_abort; /* remote abort code */ 411 int error; /* local error incurred */ 412 enum rxrpc_call_state state : 8; /* current state of call */ 413 int debug_id; /* debug ID for printks */ 414 u8 channel; /* connection channel occupied by this call */ 415 416 /* transmission-phase ACK management */ 417 u8 acks_head; /* offset into window of first entry */ 418 u8 acks_tail; /* offset into window of last entry */ 419 u8 acks_winsz; /* size of un-ACK'd window */ 420 u8 acks_unacked; /* lowest unacked packet in last ACK received */ 421 int acks_latest; /* serial number of latest ACK received */ 422 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 423 unsigned long *acks_window; /* sent packet window 424 * - elements are pointers with LSB set if ACK'd 425 */ 426 427 /* receive-phase ACK management */ 428 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 429 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 430 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 431 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 432 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 433 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 434 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 435 u8 ackr_reason; /* reason to ACK */ 436 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 437 atomic_t ackr_not_idle; /* number of packets in Rx queue */ 438 439 /* received packet records, 1 bit per record */ 440 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 441 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 442 443 struct hlist_node hash_node; 444 unsigned long hash_key; /* Full hash key */ 445 u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */ 446 struct rxrpc_local *local; /* Local endpoint. Used for hashing. */ 447 sa_family_t proto; /* Frame protocol */ 448 u32 call_id; /* call ID on connection */ 449 u32 cid; /* connection ID plus channel index */ 450 u32 epoch; /* epoch of this connection */ 451 u16 service_id; /* service ID */ 452 union { /* Peer IP address for hashing */ 453 __be32 ipv4_addr; 454 __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */ 455 } peer_ip; 456 }; 457 458 /* 459 * locally abort an RxRPC call 460 */ 461 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 462 { 463 write_lock_bh(&call->state_lock); 464 if (call->state < RXRPC_CALL_COMPLETE) { 465 call->local_abort = abort_code; 466 call->state = RXRPC_CALL_LOCALLY_ABORTED; 467 set_bit(RXRPC_CALL_EV_ABORT, &call->events); 468 } 469 write_unlock_bh(&call->state_lock); 470 } 471 472 /* 473 * af_rxrpc.c 474 */ 475 extern atomic_t rxrpc_n_skbs; 476 extern u32 rxrpc_epoch; 477 extern atomic_t rxrpc_debug_id; 478 extern struct workqueue_struct *rxrpc_workqueue; 479 480 /* 481 * ar-accept.c 482 */ 483 void rxrpc_accept_incoming_calls(struct work_struct *); 484 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 485 int rxrpc_reject_call(struct rxrpc_sock *); 486 487 /* 488 * ar-ack.c 489 */ 490 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 491 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 492 void rxrpc_process_call(struct work_struct *); 493 494 /* 495 * ar-call.c 496 */ 497 extern unsigned int rxrpc_max_call_lifetime; 498 extern unsigned int rxrpc_dead_call_expiry; 499 extern struct kmem_cache *rxrpc_call_jar; 500 extern struct list_head rxrpc_calls; 501 extern rwlock_t rxrpc_call_lock; 502 503 struct rxrpc_call *rxrpc_find_call_hash(struct rxrpc_host_header *, 504 void *, sa_family_t, const void *); 505 struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, 506 struct rxrpc_transport *, 507 struct rxrpc_conn_bundle *, 508 unsigned long, int, gfp_t); 509 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 510 struct rxrpc_connection *, 511 struct rxrpc_host_header *); 512 struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long); 513 void rxrpc_release_call(struct rxrpc_call *); 514 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 515 void __rxrpc_put_call(struct rxrpc_call *); 516 void __exit rxrpc_destroy_all_calls(void); 517 518 /* 519 * ar-connection.c 520 */ 521 extern unsigned int rxrpc_connection_expiry; 522 extern struct list_head rxrpc_connections; 523 extern rwlock_t rxrpc_connection_lock; 524 525 struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, 526 struct rxrpc_transport *, 527 struct key *, u16, gfp_t); 528 void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *); 529 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, 530 struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t); 531 void rxrpc_put_connection(struct rxrpc_connection *); 532 void __exit rxrpc_destroy_all_connections(void); 533 struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, 534 struct rxrpc_host_header *); 535 extern struct rxrpc_connection * 536 rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_host_header *); 537 538 /* 539 * ar-connevent.c 540 */ 541 void rxrpc_process_connection(struct work_struct *); 542 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 543 void rxrpc_reject_packets(struct work_struct *); 544 545 /* 546 * ar-error.c 547 */ 548 void rxrpc_UDP_error_report(struct sock *); 549 void rxrpc_UDP_error_handler(struct work_struct *); 550 551 /* 552 * ar-input.c 553 */ 554 void rxrpc_data_ready(struct sock *); 555 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); 556 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 557 558 /* 559 * ar-local.c 560 */ 561 extern rwlock_t rxrpc_local_lock; 562 563 struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); 564 void rxrpc_put_local(struct rxrpc_local *); 565 void __exit rxrpc_destroy_all_locals(void); 566 567 /* 568 * ar-key.c 569 */ 570 extern struct key_type key_type_rxrpc; 571 extern struct key_type key_type_rxrpc_s; 572 573 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 574 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 575 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 576 u32); 577 578 /* 579 * ar-output.c 580 */ 581 extern unsigned int rxrpc_resend_timeout; 582 583 int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); 584 int rxrpc_client_sendmsg(struct rxrpc_sock *, struct rxrpc_transport *, 585 struct msghdr *, size_t); 586 int rxrpc_server_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 587 588 /* 589 * ar-peer.c 590 */ 591 struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); 592 void rxrpc_put_peer(struct rxrpc_peer *); 593 struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16); 594 void __exit rxrpc_destroy_all_peers(void); 595 596 /* 597 * ar-proc.c 598 */ 599 extern const char *const rxrpc_call_states[]; 600 extern const struct file_operations rxrpc_call_seq_fops; 601 extern const struct file_operations rxrpc_connection_seq_fops; 602 603 /* 604 * ar-recvmsg.c 605 */ 606 void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 607 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 608 609 /* 610 * ar-security.c 611 */ 612 int __init rxrpc_init_security(void); 613 void rxrpc_exit_security(void); 614 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 615 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 616 617 /* 618 * ar-skbuff.c 619 */ 620 void rxrpc_packet_destructor(struct sk_buff *); 621 622 /* 623 * ar-transport.c 624 */ 625 extern unsigned int rxrpc_transport_expiry; 626 627 struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, 628 struct rxrpc_peer *, gfp_t); 629 void rxrpc_put_transport(struct rxrpc_transport *); 630 void __exit rxrpc_destroy_all_transports(void); 631 struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, 632 struct rxrpc_peer *); 633 634 /* 635 * insecure.c 636 */ 637 extern const struct rxrpc_security rxrpc_no_security; 638 639 /* 640 * misc.c 641 */ 642 extern unsigned int rxrpc_requested_ack_delay; 643 extern unsigned int rxrpc_soft_ack_delay; 644 extern unsigned int rxrpc_idle_ack_delay; 645 extern unsigned int rxrpc_rx_window_size; 646 extern unsigned int rxrpc_rx_mtu; 647 extern unsigned int rxrpc_rx_jumbo_max; 648 649 extern const char *const rxrpc_pkts[]; 650 extern const s8 rxrpc_ack_priority[]; 651 652 extern const char *rxrpc_acks(u8 reason); 653 654 /* 655 * rxkad.c 656 */ 657 #ifdef CONFIG_RXKAD 658 extern const struct rxrpc_security rxkad; 659 #endif 660 661 /* 662 * sysctl.c 663 */ 664 #ifdef CONFIG_SYSCTL 665 extern int __init rxrpc_sysctl_init(void); 666 extern void rxrpc_sysctl_exit(void); 667 #else 668 static inline int __init rxrpc_sysctl_init(void) { return 0; } 669 static inline void rxrpc_sysctl_exit(void) {} 670 #endif 671 672 /* 673 * debug tracing 674 */ 675 extern unsigned int rxrpc_debug; 676 677 #define dbgprintk(FMT,...) \ 678 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 679 680 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 681 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 682 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 683 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 684 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 685 686 687 #if defined(__KDEBUG) 688 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 689 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 690 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 691 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 692 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 693 694 #elif defined(CONFIG_AF_RXRPC_DEBUG) 695 #define RXRPC_DEBUG_KENTER 0x01 696 #define RXRPC_DEBUG_KLEAVE 0x02 697 #define RXRPC_DEBUG_KDEBUG 0x04 698 #define RXRPC_DEBUG_KPROTO 0x08 699 #define RXRPC_DEBUG_KNET 0x10 700 701 #define _enter(FMT,...) \ 702 do { \ 703 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 704 kenter(FMT,##__VA_ARGS__); \ 705 } while (0) 706 707 #define _leave(FMT,...) \ 708 do { \ 709 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 710 kleave(FMT,##__VA_ARGS__); \ 711 } while (0) 712 713 #define _debug(FMT,...) \ 714 do { \ 715 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 716 kdebug(FMT,##__VA_ARGS__); \ 717 } while (0) 718 719 #define _proto(FMT,...) \ 720 do { \ 721 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 722 kproto(FMT,##__VA_ARGS__); \ 723 } while (0) 724 725 #define _net(FMT,...) \ 726 do { \ 727 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 728 knet(FMT,##__VA_ARGS__); \ 729 } while (0) 730 731 #else 732 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 733 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 734 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 735 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 736 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 737 #endif 738 739 /* 740 * debug assertion checking 741 */ 742 #if 1 // defined(__KDEBUGALL) 743 744 #define ASSERT(X) \ 745 do { \ 746 if (unlikely(!(X))) { \ 747 printk(KERN_ERR "\n"); \ 748 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 749 BUG(); \ 750 } \ 751 } while (0) 752 753 #define ASSERTCMP(X, OP, Y) \ 754 do { \ 755 if (unlikely(!((X) OP (Y)))) { \ 756 printk(KERN_ERR "\n"); \ 757 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 758 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 759 (unsigned long)(X), (unsigned long)(Y)); \ 760 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 761 (unsigned long)(X), (unsigned long)(Y)); \ 762 BUG(); \ 763 } \ 764 } while (0) 765 766 #define ASSERTIF(C, X) \ 767 do { \ 768 if (unlikely((C) && !(X))) { \ 769 printk(KERN_ERR "\n"); \ 770 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 771 BUG(); \ 772 } \ 773 } while (0) 774 775 #define ASSERTIFCMP(C, X, OP, Y) \ 776 do { \ 777 if (unlikely((C) && !((X) OP (Y)))) { \ 778 printk(KERN_ERR "\n"); \ 779 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 780 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 781 (unsigned long)(X), (unsigned long)(Y)); \ 782 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 783 (unsigned long)(X), (unsigned long)(Y)); \ 784 BUG(); \ 785 } \ 786 } while (0) 787 788 #else 789 790 #define ASSERT(X) \ 791 do { \ 792 } while (0) 793 794 #define ASSERTCMP(X, OP, Y) \ 795 do { \ 796 } while (0) 797 798 #define ASSERTIF(C, X) \ 799 do { \ 800 } while (0) 801 802 #define ASSERTIFCMP(C, X, OP, Y) \ 803 do { \ 804 } while (0) 805 806 #endif /* __KDEBUGALL */ 807 808 /* 809 * socket buffer accounting / leak finding 810 */ 811 static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) 812 { 813 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 814 //atomic_inc(&rxrpc_n_skbs); 815 } 816 817 #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) 818 819 static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) 820 { 821 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 822 //atomic_dec(&rxrpc_n_skbs); 823 } 824 825 #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) 826 827 static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) 828 { 829 if (skb) { 830 CHECK_SLAB_OKAY(&skb->users); 831 //_net("free skb %p %s [%d]", 832 // skb, fn, atomic_read(&rxrpc_n_skbs)); 833 //atomic_dec(&rxrpc_n_skbs); 834 kfree_skb(skb); 835 } 836 } 837 838 #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) 839 840 static inline void rxrpc_purge_queue(struct sk_buff_head *list) 841 { 842 struct sk_buff *skb; 843 while ((skb = skb_dequeue((list))) != NULL) 844 rxrpc_free_skb(skb); 845 } 846 847 static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) 848 { 849 CHECK_SLAB_OKAY(&local->usage); 850 if (atomic_inc_return(&local->usage) == 1) 851 printk("resurrected (%s)\n", f); 852 } 853 854 #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) 855 856 #define rxrpc_get_call(CALL) \ 857 do { \ 858 CHECK_SLAB_OKAY(&(CALL)->usage); \ 859 if (atomic_inc_return(&(CALL)->usage) == 1) \ 860 BUG(); \ 861 } while (0) 862 863 #define rxrpc_put_call(CALL) \ 864 do { \ 865 __rxrpc_put_call(CALL); \ 866 } while (0) 867