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 extern atomic_t rxrpc_n_skbs; 23 24 #define FCRYPT_BSIZE 8 25 struct rxrpc_crypt { 26 union { 27 u8 x[FCRYPT_BSIZE]; 28 u32 n[2]; 29 }; 30 } __attribute__((aligned(8))); 31 32 extern __be32 rxrpc_epoch; /* local epoch for detecting local-end reset */ 33 extern atomic_t rxrpc_debug_id; /* current debugging ID */ 34 35 /* 36 * sk_state for RxRPC sockets 37 */ 38 enum { 39 RXRPC_UNCONNECTED = 0, 40 RXRPC_CLIENT_BOUND, /* client local address bound */ 41 RXRPC_CLIENT_CONNECTED, /* client is connected */ 42 RXRPC_SERVER_BOUND, /* server local address bound */ 43 RXRPC_SERVER_LISTENING, /* server listening for connections */ 44 RXRPC_CLOSE, /* socket is being closed */ 45 }; 46 47 /* 48 * RxRPC socket definition 49 */ 50 struct rxrpc_sock { 51 /* WARNING: sk has to be the first member */ 52 struct sock sk; 53 struct rxrpc_local *local; /* local endpoint */ 54 struct rxrpc_transport *trans; /* transport handler */ 55 struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */ 56 struct rxrpc_connection *conn; /* exclusive virtual connection */ 57 struct list_head listen_link; /* link in the local endpoint's listen list */ 58 struct list_head secureq; /* calls awaiting connection security clearance */ 59 struct list_head acceptq; /* calls awaiting acceptance */ 60 struct key *key; /* security for this socket */ 61 struct key *securities; /* list of server security descriptors */ 62 struct rb_root calls; /* outstanding calls on this socket */ 63 unsigned long flags; 64 #define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */ 65 rwlock_t call_lock; /* lock for calls */ 66 u32 min_sec_level; /* minimum security level */ 67 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 68 struct sockaddr_rxrpc srx; /* local address */ 69 sa_family_t proto; /* protocol created with */ 70 __be16 service_id; /* service ID of local/remote service */ 71 }; 72 73 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 74 75 /* 76 * RxRPC socket buffer private variables 77 * - max 48 bytes (struct sk_buff::cb) 78 */ 79 struct rxrpc_skb_priv { 80 struct rxrpc_call *call; /* call with which associated */ 81 unsigned long resend_at; /* time in jiffies at which to resend */ 82 union { 83 unsigned offset; /* offset into buffer of next read */ 84 int remain; /* amount of space remaining for next write */ 85 u32 error; /* network error code */ 86 bool need_resend; /* T if needs resending */ 87 }; 88 89 struct rxrpc_header hdr; /* RxRPC packet header from this packet */ 90 }; 91 92 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 93 94 enum { 95 RXRPC_SKB_MARK_DATA, /* data message */ 96 RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ 97 RXRPC_SKB_MARK_BUSY, /* server busy message */ 98 RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ 99 RXRPC_SKB_MARK_NET_ERROR, /* network error message */ 100 RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ 101 RXRPC_SKB_MARK_NEW_CALL, /* local error message */ 102 }; 103 104 enum rxrpc_command { 105 RXRPC_CMD_SEND_DATA, /* send data message */ 106 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 107 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 108 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 109 }; 110 111 /* 112 * RxRPC security module interface 113 */ 114 struct rxrpc_security { 115 struct module *owner; /* providing module */ 116 struct list_head link; /* link in master list */ 117 const char *name; /* name of this service */ 118 u8 security_index; /* security type provided */ 119 120 /* initialise a connection's security */ 121 int (*init_connection_security)(struct rxrpc_connection *); 122 123 /* prime a connection's packet security */ 124 void (*prime_packet_security)(struct rxrpc_connection *); 125 126 /* impose security on a packet */ 127 int (*secure_packet)(const struct rxrpc_call *, 128 struct sk_buff *, 129 size_t, 130 void *); 131 132 /* verify the security on a received packet */ 133 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, 134 u32 *); 135 136 /* issue a challenge */ 137 int (*issue_challenge)(struct rxrpc_connection *); 138 139 /* respond to a challenge */ 140 int (*respond_to_challenge)(struct rxrpc_connection *, 141 struct sk_buff *, 142 u32 *); 143 144 /* verify a response */ 145 int (*verify_response)(struct rxrpc_connection *, 146 struct sk_buff *, 147 u32 *); 148 149 /* clear connection security */ 150 void (*clear)(struct rxrpc_connection *); 151 }; 152 153 /* 154 * RxRPC local transport endpoint definition 155 * - matched by local port, address and protocol type 156 */ 157 struct rxrpc_local { 158 struct socket *socket; /* my UDP socket */ 159 struct work_struct destroyer; /* endpoint destroyer */ 160 struct work_struct acceptor; /* incoming call processor */ 161 struct work_struct rejecter; /* packet reject writer */ 162 struct list_head services; /* services listening on this endpoint */ 163 struct list_head link; /* link in endpoint list */ 164 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 165 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 166 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 167 spinlock_t lock; /* access lock */ 168 rwlock_t services_lock; /* lock for services list */ 169 atomic_t usage; 170 int debug_id; /* debug ID for printks */ 171 volatile char error_rcvd; /* T if received ICMP error outstanding */ 172 struct sockaddr_rxrpc srx; /* local address */ 173 }; 174 175 /* 176 * RxRPC remote transport endpoint definition 177 * - matched by remote port, address and protocol type 178 * - holds the connection ID counter for connections between the two endpoints 179 */ 180 struct rxrpc_peer { 181 struct work_struct destroyer; /* peer destroyer */ 182 struct list_head link; /* link in master peer list */ 183 struct list_head error_targets; /* targets for net error distribution */ 184 spinlock_t lock; /* access lock */ 185 atomic_t usage; 186 unsigned if_mtu; /* interface MTU for this peer */ 187 unsigned mtu; /* network MTU for this peer */ 188 unsigned maxdata; /* data size (MTU - hdrsize) */ 189 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 190 int debug_id; /* debug ID for printks */ 191 int net_error; /* network error distributed */ 192 struct sockaddr_rxrpc srx; /* remote address */ 193 194 /* calculated RTT cache */ 195 #define RXRPC_RTT_CACHE_SIZE 32 196 suseconds_t rtt; /* current RTT estimate (in uS) */ 197 unsigned rtt_point; /* next entry at which to insert */ 198 unsigned rtt_usage; /* amount of cache actually used */ 199 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 200 }; 201 202 /* 203 * RxRPC point-to-point transport / connection manager definition 204 * - handles a bundle of connections between two endpoints 205 * - matched by { local, peer } 206 */ 207 struct rxrpc_transport { 208 struct rxrpc_local *local; /* local transport endpoint */ 209 struct rxrpc_peer *peer; /* remote transport endpoint */ 210 struct work_struct error_handler; /* network error distributor */ 211 struct rb_root bundles; /* client connection bundles on this transport */ 212 struct rb_root client_conns; /* client connections on this transport */ 213 struct rb_root server_conns; /* server connections on this transport */ 214 struct list_head link; /* link in master session list */ 215 struct sk_buff_head error_queue; /* error packets awaiting processing */ 216 time_t put_time; /* time at which to reap */ 217 spinlock_t client_lock; /* client connection allocation lock */ 218 rwlock_t conn_lock; /* lock for active/dead connections */ 219 atomic_t usage; 220 int debug_id; /* debug ID for printks */ 221 unsigned int conn_idcounter; /* connection ID counter (client) */ 222 }; 223 224 /* 225 * RxRPC client connection bundle 226 * - matched by { transport, service_id, key } 227 */ 228 struct rxrpc_conn_bundle { 229 struct rb_node node; /* node in transport's lookup tree */ 230 struct list_head unused_conns; /* unused connections in this bundle */ 231 struct list_head avail_conns; /* available connections in this bundle */ 232 struct list_head busy_conns; /* busy connections in this bundle */ 233 struct key *key; /* security for this bundle */ 234 wait_queue_head_t chanwait; /* wait for channel to become available */ 235 atomic_t usage; 236 int debug_id; /* debug ID for printks */ 237 unsigned short num_conns; /* number of connections in this bundle */ 238 __be16 service_id; /* service ID */ 239 uint8_t security_ix; /* security type */ 240 }; 241 242 /* 243 * RxRPC connection definition 244 * - matched by { transport, service_id, conn_id, direction, key } 245 * - each connection can only handle four simultaneous calls 246 */ 247 struct rxrpc_connection { 248 struct rxrpc_transport *trans; /* transport session */ 249 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ 250 struct work_struct processor; /* connection event processor */ 251 struct rb_node node; /* node in transport's lookup tree */ 252 struct list_head link; /* link in master connection list */ 253 struct list_head bundle_link; /* link in bundle */ 254 struct rb_root calls; /* calls on this connection */ 255 struct sk_buff_head rx_queue; /* received conn-level packets */ 256 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ 257 struct rxrpc_security *security; /* applied security module */ 258 struct key *key; /* security for this connection (client) */ 259 struct key *server_key; /* security for this service */ 260 struct crypto_blkcipher *cipher; /* encryption handle */ 261 struct rxrpc_crypt csum_iv; /* packet checksum base */ 262 unsigned long events; 263 #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ 264 time_t put_time; /* time at which to reap */ 265 rwlock_t lock; /* access lock */ 266 spinlock_t state_lock; /* state-change lock */ 267 atomic_t usage; 268 u32 real_conn_id; /* connection ID (host-endian) */ 269 enum { /* current state of connection */ 270 RXRPC_CONN_UNUSED, /* - connection not yet attempted */ 271 RXRPC_CONN_CLIENT, /* - client connection */ 272 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ 273 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ 274 RXRPC_CONN_SERVER, /* - server secured connection */ 275 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ 276 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ 277 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ 278 } state; 279 int error; /* error code for local abort */ 280 int debug_id; /* debug ID for printks */ 281 unsigned call_counter; /* call ID counter */ 282 atomic_t serial; /* packet serial number counter */ 283 atomic_t hi_serial; /* highest serial number received */ 284 u8 avail_calls; /* number of calls available */ 285 u8 size_align; /* data size alignment (for security) */ 286 u8 header_size; /* rxrpc + security header size */ 287 u8 security_size; /* security header size */ 288 u32 security_level; /* security level negotiated */ 289 u32 security_nonce; /* response re-use preventer */ 290 291 /* the following are all in net order */ 292 __be32 epoch; /* epoch of this connection */ 293 __be32 cid; /* connection ID */ 294 __be16 service_id; /* service ID */ 295 u8 security_ix; /* security type */ 296 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ 297 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 298 }; 299 300 /* 301 * RxRPC call definition 302 * - matched by { connection, call_id } 303 */ 304 struct rxrpc_call { 305 struct rxrpc_connection *conn; /* connection carrying call */ 306 struct rxrpc_sock *socket; /* socket responsible */ 307 struct timer_list lifetimer; /* lifetime remaining on call */ 308 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 309 struct timer_list ack_timer; /* ACK generation timer */ 310 struct timer_list resend_timer; /* Tx resend timer */ 311 struct work_struct destroyer; /* call destroyer */ 312 struct work_struct processor; /* packet processor and ACK generator */ 313 struct list_head link; /* link in master call list */ 314 struct list_head error_link; /* link in error distribution list */ 315 struct list_head accept_link; /* calls awaiting acceptance */ 316 struct rb_node sock_node; /* node in socket call tree */ 317 struct rb_node conn_node; /* node in connection call tree */ 318 struct sk_buff_head rx_queue; /* received packets */ 319 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 320 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 321 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 322 unsigned long user_call_ID; /* user-defined call ID */ 323 unsigned long creation_jif; /* time of call creation */ 324 unsigned long flags; 325 #define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */ 326 #define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */ 327 #define RXRPC_CALL_RCVD_LAST 2 /* all packets received */ 328 #define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */ 329 #define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */ 330 #define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */ 331 #define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */ 332 #define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */ 333 #define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */ 334 unsigned long events; 335 #define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */ 336 #define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */ 337 #define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */ 338 #define RXRPC_CALL_RCVD_ERROR 3 /* network error received */ 339 #define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */ 340 #define RXRPC_CALL_ACK 5 /* need to generate ACK */ 341 #define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */ 342 #define RXRPC_CALL_ABORT 7 /* need to generate abort */ 343 #define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */ 344 #define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */ 345 #define RXRPC_CALL_RESEND 10 /* Tx resend required */ 346 #define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */ 347 #define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */ 348 #define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */ 349 #define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */ 350 #define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */ 351 #define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */ 352 353 spinlock_t lock; 354 rwlock_t state_lock; /* lock for state transition */ 355 atomic_t usage; 356 atomic_t sequence; /* Tx data packet sequence counter */ 357 u32 abort_code; /* local/remote abort code */ 358 enum { /* current state of call */ 359 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 360 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 361 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 362 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 363 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 364 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 365 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 366 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 367 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 368 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 369 RXRPC_CALL_COMPLETE, /* - call completed */ 370 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 371 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 372 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 373 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 374 RXRPC_CALL_DEAD, /* - call is dead */ 375 } state; 376 int debug_id; /* debug ID for printks */ 377 u8 channel; /* connection channel occupied by this call */ 378 379 /* transmission-phase ACK management */ 380 uint8_t acks_head; /* offset into window of first entry */ 381 uint8_t acks_tail; /* offset into window of last entry */ 382 uint8_t acks_winsz; /* size of un-ACK'd window */ 383 uint8_t acks_unacked; /* lowest unacked packet in last ACK received */ 384 int acks_latest; /* serial number of latest ACK received */ 385 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 386 unsigned long *acks_window; /* sent packet window 387 * - elements are pointers with LSB set if ACK'd 388 */ 389 390 /* receive-phase ACK management */ 391 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 392 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 393 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 394 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 395 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 396 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 397 rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */ 398 uint8_t ackr_reason; /* reason to ACK */ 399 __be32 ackr_serial; /* serial of packet being ACK'd */ 400 atomic_t ackr_not_idle; /* number of packets in Rx queue */ 401 402 /* received packet records, 1 bit per record */ 403 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 404 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 405 406 /* the following should all be in net order */ 407 __be32 cid; /* connection ID + channel index */ 408 __be32 call_id; /* call ID on connection */ 409 }; 410 411 /* 412 * RxRPC key for Kerberos (type-2 security) 413 */ 414 struct rxkad_key { 415 u16 security_index; /* RxRPC header security index */ 416 u16 ticket_len; /* length of ticket[] */ 417 u32 expiry; /* time at which expires */ 418 u32 kvno; /* key version number */ 419 u8 session_key[8]; /* DES session key */ 420 u8 ticket[0]; /* the encrypted ticket */ 421 }; 422 423 struct rxrpc_key_payload { 424 struct rxkad_key k; 425 }; 426 427 /* 428 * locally abort an RxRPC call 429 */ 430 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 431 { 432 write_lock_bh(&call->state_lock); 433 if (call->state < RXRPC_CALL_COMPLETE) { 434 call->abort_code = abort_code; 435 call->state = RXRPC_CALL_LOCALLY_ABORTED; 436 set_bit(RXRPC_CALL_ABORT, &call->events); 437 } 438 write_unlock_bh(&call->state_lock); 439 } 440 441 /* 442 * put a packet up for transport-level abort 443 */ 444 static inline 445 void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb) 446 { 447 CHECK_SLAB_OKAY(&local->usage); 448 if (!atomic_inc_not_zero(&local->usage)) { 449 printk("resurrected on reject\n"); 450 BUG(); 451 } 452 skb_queue_tail(&local->reject_queue, skb); 453 schedule_work(&local->rejecter); 454 } 455 456 /* 457 * ar-accept.c 458 */ 459 extern void rxrpc_accept_incoming_calls(struct work_struct *); 460 extern int rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 461 462 /* 463 * ar-ack.c 464 */ 465 extern void __rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool); 466 extern void rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool); 467 extern void rxrpc_process_call(struct work_struct *); 468 469 /* 470 * ar-call.c 471 */ 472 extern struct kmem_cache *rxrpc_call_jar; 473 extern struct list_head rxrpc_calls; 474 extern rwlock_t rxrpc_call_lock; 475 476 extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, 477 struct rxrpc_transport *, 478 struct rxrpc_conn_bundle *, 479 unsigned long, int, gfp_t); 480 extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 481 struct rxrpc_connection *, 482 struct rxrpc_header *, gfp_t); 483 extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, 484 unsigned long); 485 extern void rxrpc_release_call(struct rxrpc_call *); 486 extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 487 extern void __rxrpc_put_call(struct rxrpc_call *); 488 extern void __exit rxrpc_destroy_all_calls(void); 489 490 /* 491 * ar-connection.c 492 */ 493 extern struct list_head rxrpc_connections; 494 extern rwlock_t rxrpc_connection_lock; 495 496 extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, 497 struct rxrpc_transport *, 498 struct key *, 499 __be16, gfp_t); 500 extern void rxrpc_put_bundle(struct rxrpc_transport *, 501 struct rxrpc_conn_bundle *); 502 extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, 503 struct rxrpc_conn_bundle *, struct rxrpc_call *, 504 gfp_t); 505 extern void rxrpc_put_connection(struct rxrpc_connection *); 506 extern void __exit rxrpc_destroy_all_connections(void); 507 extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, 508 struct rxrpc_header *); 509 extern struct rxrpc_connection * 510 rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *, 511 gfp_t); 512 513 /* 514 * ar-connevent.c 515 */ 516 extern void rxrpc_process_connection(struct work_struct *); 517 extern void rxrpc_reject_packets(struct work_struct *); 518 519 /* 520 * ar-error.c 521 */ 522 extern void rxrpc_UDP_error_report(struct sock *); 523 extern void rxrpc_UDP_error_handler(struct work_struct *); 524 525 /* 526 * ar-input.c 527 */ 528 extern unsigned long rxrpc_ack_timeout; 529 extern const char *rxrpc_pkts[]; 530 531 extern void rxrpc_data_ready(struct sock *, int); 532 extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, 533 bool); 534 extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 535 536 /* 537 * ar-local.c 538 */ 539 extern rwlock_t rxrpc_local_lock; 540 extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); 541 extern void rxrpc_put_local(struct rxrpc_local *); 542 extern void __exit rxrpc_destroy_all_locals(void); 543 544 /* 545 * ar-key.c 546 */ 547 extern struct key_type key_type_rxrpc; 548 extern struct key_type key_type_rxrpc_s; 549 550 extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 551 extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 552 extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, 553 time_t, u32); 554 555 /* 556 * ar-output.c 557 */ 558 extern int rxrpc_resend_timeout; 559 560 extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); 561 extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *, 562 struct rxrpc_transport *, struct msghdr *, 563 size_t); 564 extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *, 565 struct msghdr *, size_t); 566 567 /* 568 * ar-peer.c 569 */ 570 extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); 571 extern void rxrpc_put_peer(struct rxrpc_peer *); 572 extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, 573 __be32, __be16); 574 extern void __exit rxrpc_destroy_all_peers(void); 575 576 /* 577 * ar-proc.c 578 */ 579 extern const char *rxrpc_call_states[]; 580 extern struct file_operations rxrpc_call_seq_fops; 581 extern struct file_operations rxrpc_connection_seq_fops; 582 583 /* 584 * ar-recvmsg.c 585 */ 586 extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *, 587 size_t, int); 588 589 /* 590 * ar-security.c 591 */ 592 extern int rxrpc_register_security(struct rxrpc_security *); 593 extern void rxrpc_unregister_security(struct rxrpc_security *); 594 extern int rxrpc_init_client_conn_security(struct rxrpc_connection *); 595 extern int rxrpc_init_server_conn_security(struct rxrpc_connection *); 596 extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, 597 size_t, void *); 598 extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, 599 u32 *); 600 extern void rxrpc_clear_conn_security(struct rxrpc_connection *); 601 602 /* 603 * ar-skbuff.c 604 */ 605 extern void rxrpc_packet_destructor(struct sk_buff *); 606 607 /* 608 * ar-transport.c 609 */ 610 extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, 611 struct rxrpc_peer *, 612 gfp_t); 613 extern void rxrpc_put_transport(struct rxrpc_transport *); 614 extern void __exit rxrpc_destroy_all_transports(void); 615 extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, 616 struct rxrpc_peer *); 617 618 /* 619 * debug tracing 620 */ 621 extern unsigned rxrpc_debug; 622 623 #define dbgprintk(FMT,...) \ 624 printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__) 625 626 /* make sure we maintain the format strings, even when debugging is disabled */ 627 static inline __attribute__((format(printf,1,2))) 628 void _dbprintk(const char *fmt, ...) 629 { 630 } 631 632 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) 633 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) 634 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 635 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 636 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 637 638 639 #if defined(__KDEBUG) 640 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 641 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 642 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 643 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 644 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 645 646 #elif defined(CONFIG_AF_RXRPC_DEBUG) 647 #define RXRPC_DEBUG_KENTER 0x01 648 #define RXRPC_DEBUG_KLEAVE 0x02 649 #define RXRPC_DEBUG_KDEBUG 0x04 650 #define RXRPC_DEBUG_KPROTO 0x08 651 #define RXRPC_DEBUG_KNET 0x10 652 653 #define _enter(FMT,...) \ 654 do { \ 655 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 656 kenter(FMT,##__VA_ARGS__); \ 657 } while (0) 658 659 #define _leave(FMT,...) \ 660 do { \ 661 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 662 kleave(FMT,##__VA_ARGS__); \ 663 } while (0) 664 665 #define _debug(FMT,...) \ 666 do { \ 667 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 668 kdebug(FMT,##__VA_ARGS__); \ 669 } while (0) 670 671 #define _proto(FMT,...) \ 672 do { \ 673 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 674 kproto(FMT,##__VA_ARGS__); \ 675 } while (0) 676 677 #define _net(FMT,...) \ 678 do { \ 679 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 680 knet(FMT,##__VA_ARGS__); \ 681 } while (0) 682 683 #else 684 #define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) 685 #define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) 686 #define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__) 687 #define _proto(FMT,...) _dbprintk("### "FMT ,##__VA_ARGS__) 688 #define _net(FMT,...) _dbprintk("@@@ "FMT ,##__VA_ARGS__) 689 #endif 690 691 /* 692 * debug assertion checking 693 */ 694 #if 1 // defined(__KDEBUGALL) 695 696 #define ASSERT(X) \ 697 do { \ 698 if (unlikely(!(X))) { \ 699 printk(KERN_ERR "\n"); \ 700 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 701 BUG(); \ 702 } \ 703 } while(0) 704 705 #define ASSERTCMP(X, OP, Y) \ 706 do { \ 707 if (unlikely(!((X) OP (Y)))) { \ 708 printk(KERN_ERR "\n"); \ 709 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 710 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 711 (unsigned long)(X), (unsigned long)(Y)); \ 712 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 713 (unsigned long)(X), (unsigned long)(Y)); \ 714 BUG(); \ 715 } \ 716 } while(0) 717 718 #define ASSERTIF(C, X) \ 719 do { \ 720 if (unlikely((C) && !(X))) { \ 721 printk(KERN_ERR "\n"); \ 722 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 723 BUG(); \ 724 } \ 725 } while(0) 726 727 #define ASSERTIFCMP(C, X, OP, Y) \ 728 do { \ 729 if (unlikely((C) && !((X) OP (Y)))) { \ 730 printk(KERN_ERR "\n"); \ 731 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 732 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 733 (unsigned long)(X), (unsigned long)(Y)); \ 734 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 735 (unsigned long)(X), (unsigned long)(Y)); \ 736 BUG(); \ 737 } \ 738 } while(0) 739 740 #else 741 742 #define ASSERT(X) \ 743 do { \ 744 } while(0) 745 746 #define ASSERTCMP(X, OP, Y) \ 747 do { \ 748 } while(0) 749 750 #define ASSERTIF(C, X) \ 751 do { \ 752 } while(0) 753 754 #define ASSERTIFCMP(C, X, OP, Y) \ 755 do { \ 756 } while(0) 757 758 #endif /* __KDEBUGALL */ 759 760 /* 761 * socket buffer accounting / leak finding 762 */ 763 static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) 764 { 765 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 766 //atomic_inc(&rxrpc_n_skbs); 767 } 768 769 #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) 770 771 static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) 772 { 773 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 774 //atomic_dec(&rxrpc_n_skbs); 775 } 776 777 #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) 778 779 static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) 780 { 781 if (skb) { 782 CHECK_SLAB_OKAY(&skb->users); 783 //_net("free skb %p %s [%d]", 784 // skb, fn, atomic_read(&rxrpc_n_skbs)); 785 //atomic_dec(&rxrpc_n_skbs); 786 kfree_skb(skb); 787 } 788 } 789 790 #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) 791 792 static inline void rxrpc_purge_queue(struct sk_buff_head *list) 793 { 794 struct sk_buff *skb; 795 while ((skb = skb_dequeue((list))) != NULL) 796 rxrpc_free_skb(skb); 797 } 798 799 static inline void __rxrpc__atomic_inc(atomic_t *v) 800 { 801 CHECK_SLAB_OKAY(v); 802 atomic_inc(v); 803 } 804 805 #define atomic_inc(v) __rxrpc__atomic_inc((v)) 806 807 static inline void __rxrpc__atomic_dec(atomic_t *v) 808 { 809 CHECK_SLAB_OKAY(v); 810 atomic_dec(v); 811 } 812 813 #define atomic_dec(v) __rxrpc__atomic_dec((v)) 814 815 static inline int __rxrpc__atomic_dec_and_test(atomic_t *v) 816 { 817 CHECK_SLAB_OKAY(v); 818 return atomic_dec_and_test(v); 819 } 820 821 #define atomic_dec_and_test(v) __rxrpc__atomic_dec_and_test((v)) 822 823 static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) 824 { 825 CHECK_SLAB_OKAY(&local->usage); 826 if (atomic_inc_return(&local->usage) == 1) 827 printk("resurrected (%s)\n", f); 828 } 829 830 #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) 831 832 #define rxrpc_get_call(CALL) \ 833 do { \ 834 CHECK_SLAB_OKAY(&(CALL)->usage); \ 835 if (atomic_inc_return(&(CALL)->usage) == 1) \ 836 BUG(); \ 837 } while(0) 838 839 #define rxrpc_put_call(CALL) \ 840 do { \ 841 __rxrpc_put_call(CALL); \ 842 } while(0) 843