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