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 __be16 service_id; /* service ID of local/remote service */ 74 }; 75 76 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 77 78 /* 79 * RxRPC socket buffer private variables 80 * - max 48 bytes (struct sk_buff::cb) 81 */ 82 struct rxrpc_skb_priv { 83 struct rxrpc_call *call; /* call with which associated */ 84 unsigned long resend_at; /* time in jiffies at which to resend */ 85 union { 86 unsigned int offset; /* offset into buffer of next read */ 87 int remain; /* amount of space remaining for next write */ 88 u32 error; /* network error code */ 89 bool need_resend; /* T if needs resending */ 90 }; 91 92 struct rxrpc_header hdr; /* RxRPC packet header from this packet */ 93 }; 94 95 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 96 97 enum rxrpc_command { 98 RXRPC_CMD_SEND_DATA, /* send data message */ 99 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 100 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 101 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 102 }; 103 104 /* 105 * RxRPC security module interface 106 */ 107 struct rxrpc_security { 108 struct module *owner; /* providing module */ 109 struct list_head link; /* link in master list */ 110 const char *name; /* name of this service */ 111 u8 security_index; /* security type provided */ 112 113 /* initialise a connection's security */ 114 int (*init_connection_security)(struct rxrpc_connection *); 115 116 /* prime a connection's packet security */ 117 void (*prime_packet_security)(struct rxrpc_connection *); 118 119 /* impose security on a packet */ 120 int (*secure_packet)(const struct rxrpc_call *, 121 struct sk_buff *, 122 size_t, 123 void *); 124 125 /* verify the security on a received packet */ 126 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, 127 u32 *); 128 129 /* issue a challenge */ 130 int (*issue_challenge)(struct rxrpc_connection *); 131 132 /* respond to a challenge */ 133 int (*respond_to_challenge)(struct rxrpc_connection *, 134 struct sk_buff *, 135 u32 *); 136 137 /* verify a response */ 138 int (*verify_response)(struct rxrpc_connection *, 139 struct sk_buff *, 140 u32 *); 141 142 /* clear connection security */ 143 void (*clear)(struct rxrpc_connection *); 144 }; 145 146 /* 147 * RxRPC local transport endpoint definition 148 * - matched by local port, address and protocol type 149 */ 150 struct rxrpc_local { 151 struct socket *socket; /* my UDP socket */ 152 struct work_struct destroyer; /* endpoint destroyer */ 153 struct work_struct acceptor; /* incoming call processor */ 154 struct work_struct rejecter; /* packet reject writer */ 155 struct list_head services; /* services listening on this endpoint */ 156 struct list_head link; /* link in endpoint list */ 157 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 158 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 159 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 160 spinlock_t lock; /* access lock */ 161 rwlock_t services_lock; /* lock for services list */ 162 atomic_t usage; 163 int debug_id; /* debug ID for printks */ 164 volatile char error_rcvd; /* T if received ICMP error outstanding */ 165 struct sockaddr_rxrpc srx; /* local address */ 166 }; 167 168 /* 169 * RxRPC remote transport endpoint definition 170 * - matched by remote port, address and protocol type 171 * - holds the connection ID counter for connections between the two endpoints 172 */ 173 struct rxrpc_peer { 174 struct work_struct destroyer; /* peer destroyer */ 175 struct list_head link; /* link in master peer list */ 176 struct list_head error_targets; /* targets for net error distribution */ 177 spinlock_t lock; /* access lock */ 178 atomic_t usage; 179 unsigned int if_mtu; /* interface MTU for this peer */ 180 unsigned int mtu; /* network MTU for this peer */ 181 unsigned int maxdata; /* data size (MTU - hdrsize) */ 182 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 183 int debug_id; /* debug ID for printks */ 184 int net_error; /* network error distributed */ 185 struct sockaddr_rxrpc srx; /* remote address */ 186 187 /* calculated RTT cache */ 188 #define RXRPC_RTT_CACHE_SIZE 32 189 suseconds_t rtt; /* current RTT estimate (in uS) */ 190 unsigned int rtt_point; /* next entry at which to insert */ 191 unsigned int rtt_usage; /* amount of cache actually used */ 192 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 193 }; 194 195 /* 196 * RxRPC point-to-point transport / connection manager definition 197 * - handles a bundle of connections between two endpoints 198 * - matched by { local, peer } 199 */ 200 struct rxrpc_transport { 201 struct rxrpc_local *local; /* local transport endpoint */ 202 struct rxrpc_peer *peer; /* remote transport endpoint */ 203 struct work_struct error_handler; /* network error distributor */ 204 struct rb_root bundles; /* client connection bundles on this transport */ 205 struct rb_root client_conns; /* client connections on this transport */ 206 struct rb_root server_conns; /* server connections on this transport */ 207 struct list_head link; /* link in master session list */ 208 struct sk_buff_head error_queue; /* error packets awaiting processing */ 209 time_t put_time; /* time at which to reap */ 210 spinlock_t client_lock; /* client connection allocation lock */ 211 rwlock_t conn_lock; /* lock for active/dead connections */ 212 atomic_t usage; 213 int debug_id; /* debug ID for printks */ 214 unsigned int conn_idcounter; /* connection ID counter (client) */ 215 }; 216 217 /* 218 * RxRPC client connection bundle 219 * - matched by { transport, service_id, key } 220 */ 221 struct rxrpc_conn_bundle { 222 struct rb_node node; /* node in transport's lookup tree */ 223 struct list_head unused_conns; /* unused connections in this bundle */ 224 struct list_head avail_conns; /* available connections in this bundle */ 225 struct list_head busy_conns; /* busy connections in this bundle */ 226 struct key *key; /* security for this bundle */ 227 wait_queue_head_t chanwait; /* wait for channel to become available */ 228 atomic_t usage; 229 int debug_id; /* debug ID for printks */ 230 unsigned short num_conns; /* number of connections in this bundle */ 231 __be16 service_id; /* service ID */ 232 u8 security_ix; /* security type */ 233 }; 234 235 /* 236 * RxRPC connection definition 237 * - matched by { transport, service_id, conn_id, direction, key } 238 * - each connection can only handle four simultaneous calls 239 */ 240 struct rxrpc_connection { 241 struct rxrpc_transport *trans; /* transport session */ 242 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ 243 struct work_struct processor; /* connection event processor */ 244 struct rb_node node; /* node in transport's lookup tree */ 245 struct list_head link; /* link in master connection list */ 246 struct list_head bundle_link; /* link in bundle */ 247 struct rb_root calls; /* calls on this connection */ 248 struct sk_buff_head rx_queue; /* received conn-level packets */ 249 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ 250 struct rxrpc_security *security; /* applied security module */ 251 struct key *key; /* security for this connection (client) */ 252 struct key *server_key; /* security for this service */ 253 struct crypto_blkcipher *cipher; /* encryption handle */ 254 struct rxrpc_crypt csum_iv; /* packet checksum base */ 255 unsigned long events; 256 #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ 257 time_t put_time; /* time at which to reap */ 258 rwlock_t lock; /* access lock */ 259 spinlock_t state_lock; /* state-change lock */ 260 atomic_t usage; 261 u32 real_conn_id; /* connection ID (host-endian) */ 262 enum { /* current state of connection */ 263 RXRPC_CONN_UNUSED, /* - connection not yet attempted */ 264 RXRPC_CONN_CLIENT, /* - client connection */ 265 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ 266 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ 267 RXRPC_CONN_SERVER, /* - server secured connection */ 268 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ 269 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ 270 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ 271 } state; 272 int error; /* error code for local abort */ 273 int debug_id; /* debug ID for printks */ 274 unsigned int call_counter; /* call ID counter */ 275 atomic_t serial; /* packet serial number counter */ 276 atomic_t hi_serial; /* highest serial number received */ 277 u8 avail_calls; /* number of calls available */ 278 u8 size_align; /* data size alignment (for security) */ 279 u8 header_size; /* rxrpc + security header size */ 280 u8 security_size; /* security header size */ 281 u32 security_level; /* security level negotiated */ 282 u32 security_nonce; /* response re-use preventer */ 283 284 /* the following are all in net order */ 285 __be32 epoch; /* epoch of this connection */ 286 __be32 cid; /* connection ID */ 287 __be16 service_id; /* service ID */ 288 u8 security_ix; /* security type */ 289 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ 290 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 291 }; 292 293 /* 294 * RxRPC call definition 295 * - matched by { connection, call_id } 296 */ 297 struct rxrpc_call { 298 struct rxrpc_connection *conn; /* connection carrying call */ 299 struct rxrpc_sock *socket; /* socket responsible */ 300 struct timer_list lifetimer; /* lifetime remaining on call */ 301 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 302 struct timer_list ack_timer; /* ACK generation timer */ 303 struct timer_list resend_timer; /* Tx resend timer */ 304 struct work_struct destroyer; /* call destroyer */ 305 struct work_struct processor; /* packet processor and ACK generator */ 306 struct list_head link; /* link in master call list */ 307 struct list_head error_link; /* link in error distribution list */ 308 struct list_head accept_link; /* calls awaiting acceptance */ 309 struct rb_node sock_node; /* node in socket call tree */ 310 struct rb_node conn_node; /* node in connection call tree */ 311 struct sk_buff_head rx_queue; /* received packets */ 312 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 313 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 314 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 315 unsigned long user_call_ID; /* user-defined call ID */ 316 unsigned long creation_jif; /* time of call creation */ 317 unsigned long flags; 318 #define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */ 319 #define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */ 320 #define RXRPC_CALL_RCVD_LAST 2 /* all packets received */ 321 #define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */ 322 #define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */ 323 #define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */ 324 #define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */ 325 #define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */ 326 #define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */ 327 unsigned long events; 328 #define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */ 329 #define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */ 330 #define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */ 331 #define RXRPC_CALL_RCVD_ERROR 3 /* network error received */ 332 #define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */ 333 #define RXRPC_CALL_ACK 5 /* need to generate ACK */ 334 #define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */ 335 #define RXRPC_CALL_ABORT 7 /* need to generate abort */ 336 #define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */ 337 #define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */ 338 #define RXRPC_CALL_RESEND 10 /* Tx resend required */ 339 #define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */ 340 #define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */ 341 #define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */ 342 #define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */ 343 #define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */ 344 #define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */ 345 346 spinlock_t lock; 347 rwlock_t state_lock; /* lock for state transition */ 348 atomic_t usage; 349 atomic_t sequence; /* Tx data packet sequence counter */ 350 u32 abort_code; /* local/remote abort code */ 351 enum { /* current state of call */ 352 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 353 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 354 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 355 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 356 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 357 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 358 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 359 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 360 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 361 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 362 RXRPC_CALL_COMPLETE, /* - call completed */ 363 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 364 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 365 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 366 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 367 RXRPC_CALL_DEAD, /* - call is dead */ 368 } state; 369 int debug_id; /* debug ID for printks */ 370 u8 channel; /* connection channel occupied by this call */ 371 372 /* transmission-phase ACK management */ 373 u8 acks_head; /* offset into window of first entry */ 374 u8 acks_tail; /* offset into window of last entry */ 375 u8 acks_winsz; /* size of un-ACK'd window */ 376 u8 acks_unacked; /* lowest unacked packet in last ACK received */ 377 int acks_latest; /* serial number of latest ACK received */ 378 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 379 unsigned long *acks_window; /* sent packet window 380 * - elements are pointers with LSB set if ACK'd 381 */ 382 383 /* receive-phase ACK management */ 384 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 385 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 386 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 387 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 388 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 389 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 390 rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */ 391 u8 ackr_reason; /* reason to ACK */ 392 __be32 ackr_serial; /* serial of packet being ACK'd */ 393 atomic_t ackr_not_idle; /* number of packets in Rx queue */ 394 395 /* received packet records, 1 bit per record */ 396 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 397 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 398 399 struct hlist_node hash_node; 400 unsigned long hash_key; /* Full hash key */ 401 u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */ 402 struct rxrpc_local *local; /* Local endpoint. Used for hashing. */ 403 sa_family_t proto; /* Frame protocol */ 404 /* the following should all be in net order */ 405 __be32 cid; /* connection ID + channel index */ 406 __be32 call_id; /* call ID on connection */ 407 __be32 epoch; /* epoch of this connection */ 408 __be16 service_id; /* service ID */ 409 union { /* Peer IP address for hashing */ 410 __be32 ipv4_addr; 411 __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */ 412 } peer_ip; 413 }; 414 415 /* 416 * locally abort an RxRPC call 417 */ 418 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 419 { 420 write_lock_bh(&call->state_lock); 421 if (call->state < RXRPC_CALL_COMPLETE) { 422 call->abort_code = abort_code; 423 call->state = RXRPC_CALL_LOCALLY_ABORTED; 424 set_bit(RXRPC_CALL_ABORT, &call->events); 425 } 426 write_unlock_bh(&call->state_lock); 427 } 428 429 /* 430 * af_rxrpc.c 431 */ 432 extern atomic_t rxrpc_n_skbs; 433 extern __be32 rxrpc_epoch; 434 extern atomic_t rxrpc_debug_id; 435 extern struct workqueue_struct *rxrpc_workqueue; 436 437 /* 438 * ar-accept.c 439 */ 440 void rxrpc_accept_incoming_calls(struct work_struct *); 441 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 442 int rxrpc_reject_call(struct rxrpc_sock *); 443 444 /* 445 * ar-ack.c 446 */ 447 extern unsigned rxrpc_requested_ack_delay; 448 extern unsigned rxrpc_soft_ack_delay; 449 extern unsigned rxrpc_idle_ack_delay; 450 extern unsigned rxrpc_rx_window_size; 451 extern unsigned rxrpc_rx_mtu; 452 extern unsigned rxrpc_rx_jumbo_max; 453 454 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); 455 void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); 456 void rxrpc_process_call(struct work_struct *); 457 458 /* 459 * ar-call.c 460 */ 461 extern unsigned rxrpc_max_call_lifetime; 462 extern unsigned rxrpc_dead_call_expiry; 463 extern struct kmem_cache *rxrpc_call_jar; 464 extern struct list_head rxrpc_calls; 465 extern rwlock_t rxrpc_call_lock; 466 467 struct rxrpc_call *rxrpc_find_call_hash(u8, __be32, __be32, __be32, 468 __be16, void *, sa_family_t, const u8 *); 469 struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, 470 struct rxrpc_transport *, 471 struct rxrpc_conn_bundle *, 472 unsigned long, int, gfp_t); 473 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 474 struct rxrpc_connection *, 475 struct rxrpc_header *, gfp_t); 476 struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long); 477 void rxrpc_release_call(struct rxrpc_call *); 478 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 479 void __rxrpc_put_call(struct rxrpc_call *); 480 void __exit rxrpc_destroy_all_calls(void); 481 482 /* 483 * ar-connection.c 484 */ 485 extern unsigned rxrpc_connection_expiry; 486 extern struct list_head rxrpc_connections; 487 extern rwlock_t rxrpc_connection_lock; 488 489 struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, 490 struct rxrpc_transport *, 491 struct key *, __be16, gfp_t); 492 void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *); 493 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, 494 struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t); 495 void rxrpc_put_connection(struct rxrpc_connection *); 496 void __exit rxrpc_destroy_all_connections(void); 497 struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, 498 struct rxrpc_header *); 499 extern struct rxrpc_connection * 500 rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *, 501 gfp_t); 502 503 /* 504 * ar-connevent.c 505 */ 506 void rxrpc_process_connection(struct work_struct *); 507 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 508 void rxrpc_reject_packets(struct work_struct *); 509 510 /* 511 * ar-error.c 512 */ 513 void rxrpc_UDP_error_report(struct sock *); 514 void rxrpc_UDP_error_handler(struct work_struct *); 515 516 /* 517 * ar-input.c 518 */ 519 extern const char *rxrpc_pkts[]; 520 521 void rxrpc_data_ready(struct sock *); 522 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); 523 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 524 525 /* 526 * ar-local.c 527 */ 528 extern rwlock_t rxrpc_local_lock; 529 530 struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); 531 void rxrpc_put_local(struct rxrpc_local *); 532 void __exit rxrpc_destroy_all_locals(void); 533 534 /* 535 * ar-key.c 536 */ 537 extern struct key_type key_type_rxrpc; 538 extern struct key_type key_type_rxrpc_s; 539 540 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 541 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 542 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 543 u32); 544 545 /* 546 * ar-output.c 547 */ 548 extern unsigned rxrpc_resend_timeout; 549 550 int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); 551 int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *, 552 struct rxrpc_transport *, struct msghdr *, size_t); 553 int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *, struct msghdr *, 554 size_t); 555 556 /* 557 * ar-peer.c 558 */ 559 struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); 560 void rxrpc_put_peer(struct rxrpc_peer *); 561 struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16); 562 void __exit rxrpc_destroy_all_peers(void); 563 564 /* 565 * ar-proc.c 566 */ 567 extern const char *const rxrpc_call_states[]; 568 extern const struct file_operations rxrpc_call_seq_fops; 569 extern const struct file_operations rxrpc_connection_seq_fops; 570 571 /* 572 * ar-recvmsg.c 573 */ 574 void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 575 int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *, size_t, 576 int); 577 578 /* 579 * ar-security.c 580 */ 581 int rxrpc_register_security(struct rxrpc_security *); 582 void rxrpc_unregister_security(struct rxrpc_security *); 583 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 584 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 585 int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, size_t, 586 void *); 587 int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, u32 *); 588 void rxrpc_clear_conn_security(struct rxrpc_connection *); 589 590 /* 591 * ar-skbuff.c 592 */ 593 void rxrpc_packet_destructor(struct sk_buff *); 594 595 /* 596 * ar-transport.c 597 */ 598 extern unsigned rxrpc_transport_expiry; 599 600 struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, 601 struct rxrpc_peer *, gfp_t); 602 void rxrpc_put_transport(struct rxrpc_transport *); 603 void __exit rxrpc_destroy_all_transports(void); 604 struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, 605 struct rxrpc_peer *); 606 607 /* 608 * sysctl.c 609 */ 610 #ifdef CONFIG_SYSCTL 611 extern int __init rxrpc_sysctl_init(void); 612 extern void rxrpc_sysctl_exit(void); 613 #else 614 static inline int __init rxrpc_sysctl_init(void) { return 0; } 615 static inline void rxrpc_sysctl_exit(void) {} 616 #endif 617 618 /* 619 * debug tracing 620 */ 621 extern unsigned int rxrpc_debug; 622 623 #define dbgprintk(FMT,...) \ 624 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 625 626 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 627 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 628 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 629 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 630 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 631 632 633 #if defined(__KDEBUG) 634 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 635 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 636 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 637 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 638 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 639 640 #elif defined(CONFIG_AF_RXRPC_DEBUG) 641 #define RXRPC_DEBUG_KENTER 0x01 642 #define RXRPC_DEBUG_KLEAVE 0x02 643 #define RXRPC_DEBUG_KDEBUG 0x04 644 #define RXRPC_DEBUG_KPROTO 0x08 645 #define RXRPC_DEBUG_KNET 0x10 646 647 #define _enter(FMT,...) \ 648 do { \ 649 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 650 kenter(FMT,##__VA_ARGS__); \ 651 } while (0) 652 653 #define _leave(FMT,...) \ 654 do { \ 655 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 656 kleave(FMT,##__VA_ARGS__); \ 657 } while (0) 658 659 #define _debug(FMT,...) \ 660 do { \ 661 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 662 kdebug(FMT,##__VA_ARGS__); \ 663 } while (0) 664 665 #define _proto(FMT,...) \ 666 do { \ 667 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 668 kproto(FMT,##__VA_ARGS__); \ 669 } while (0) 670 671 #define _net(FMT,...) \ 672 do { \ 673 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 674 knet(FMT,##__VA_ARGS__); \ 675 } while (0) 676 677 #else 678 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 679 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 680 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 681 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 682 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 683 #endif 684 685 /* 686 * debug assertion checking 687 */ 688 #if 1 // defined(__KDEBUGALL) 689 690 #define ASSERT(X) \ 691 do { \ 692 if (unlikely(!(X))) { \ 693 printk(KERN_ERR "\n"); \ 694 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 695 BUG(); \ 696 } \ 697 } while(0) 698 699 #define ASSERTCMP(X, OP, Y) \ 700 do { \ 701 if (unlikely(!((X) OP (Y)))) { \ 702 printk(KERN_ERR "\n"); \ 703 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 704 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 705 (unsigned long)(X), (unsigned long)(Y)); \ 706 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 707 (unsigned long)(X), (unsigned long)(Y)); \ 708 BUG(); \ 709 } \ 710 } while(0) 711 712 #define ASSERTIF(C, X) \ 713 do { \ 714 if (unlikely((C) && !(X))) { \ 715 printk(KERN_ERR "\n"); \ 716 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 717 BUG(); \ 718 } \ 719 } while(0) 720 721 #define ASSERTIFCMP(C, X, OP, Y) \ 722 do { \ 723 if (unlikely((C) && !((X) OP (Y)))) { \ 724 printk(KERN_ERR "\n"); \ 725 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 726 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 727 (unsigned long)(X), (unsigned long)(Y)); \ 728 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 729 (unsigned long)(X), (unsigned long)(Y)); \ 730 BUG(); \ 731 } \ 732 } while(0) 733 734 #else 735 736 #define ASSERT(X) \ 737 do { \ 738 } while(0) 739 740 #define ASSERTCMP(X, OP, Y) \ 741 do { \ 742 } while(0) 743 744 #define ASSERTIF(C, X) \ 745 do { \ 746 } while(0) 747 748 #define ASSERTIFCMP(C, X, OP, Y) \ 749 do { \ 750 } while(0) 751 752 #endif /* __KDEBUGALL */ 753 754 /* 755 * socket buffer accounting / leak finding 756 */ 757 static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) 758 { 759 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 760 //atomic_inc(&rxrpc_n_skbs); 761 } 762 763 #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) 764 765 static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) 766 { 767 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 768 //atomic_dec(&rxrpc_n_skbs); 769 } 770 771 #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) 772 773 static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) 774 { 775 if (skb) { 776 CHECK_SLAB_OKAY(&skb->users); 777 //_net("free skb %p %s [%d]", 778 // skb, fn, atomic_read(&rxrpc_n_skbs)); 779 //atomic_dec(&rxrpc_n_skbs); 780 kfree_skb(skb); 781 } 782 } 783 784 #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) 785 786 static inline void rxrpc_purge_queue(struct sk_buff_head *list) 787 { 788 struct sk_buff *skb; 789 while ((skb = skb_dequeue((list))) != NULL) 790 rxrpc_free_skb(skb); 791 } 792 793 static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) 794 { 795 CHECK_SLAB_OKAY(&local->usage); 796 if (atomic_inc_return(&local->usage) == 1) 797 printk("resurrected (%s)\n", f); 798 } 799 800 #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) 801 802 #define rxrpc_get_call(CALL) \ 803 do { \ 804 CHECK_SLAB_OKAY(&(CALL)->usage); \ 805 if (atomic_inc_return(&(CALL)->usage) == 1) \ 806 BUG(); \ 807 } while(0) 808 809 #define rxrpc_put_call(CALL) \ 810 do { \ 811 __rxrpc_put_call(CALL); \ 812 } while(0) 813