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#define CHECK_SLAB_OKAY(X) do {} while(0) 15 16#define FCRYPT_BSIZE 8 17struct rxrpc_crypt { 18 union { 19 u8 x[FCRYPT_BSIZE]; 20 __be32 n[2]; 21 }; 22} __attribute__((aligned(8))); 23 24#define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 25#define rxrpc_queue_delayed_work(WS,D) \ 26 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 27 28#define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) 29#define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor) 30 31/* 32 * sk_state for RxRPC sockets 33 */ 34enum { 35 RXRPC_UNCONNECTED = 0, 36 RXRPC_CLIENT_BOUND, /* client local address bound */ 37 RXRPC_CLIENT_CONNECTED, /* client is connected */ 38 RXRPC_SERVER_BOUND, /* server local address bound */ 39 RXRPC_SERVER_LISTENING, /* server listening for connections */ 40 RXRPC_CLOSE, /* socket is being closed */ 41}; 42 43/* 44 * RxRPC socket definition 45 */ 46struct rxrpc_sock { 47 /* WARNING: sk has to be the first member */ 48 struct sock sk; 49 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */ 50 struct rxrpc_local *local; /* local endpoint */ 51 struct rxrpc_transport *trans; /* transport handler */ 52 struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */ 53 struct rxrpc_connection *conn; /* exclusive virtual connection */ 54 struct list_head listen_link; /* link in the local endpoint's listen list */ 55 struct list_head secureq; /* calls awaiting connection security clearance */ 56 struct list_head acceptq; /* calls awaiting acceptance */ 57 struct key *key; /* security for this socket */ 58 struct key *securities; /* list of server security descriptors */ 59 struct rb_root calls; /* outstanding calls on this socket */ 60 unsigned long flags; 61#define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */ 62 rwlock_t call_lock; /* lock for calls */ 63 u32 min_sec_level; /* minimum security level */ 64#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 65 struct sockaddr_rxrpc srx; /* local address */ 66 sa_family_t proto; /* protocol created with */ 67 __be16 service_id; /* service ID of local/remote service */ 68}; 69 70#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 71 72/* 73 * RxRPC socket buffer private variables 74 * - max 48 bytes (struct sk_buff::cb) 75 */ 76struct rxrpc_skb_priv { 77 struct rxrpc_call *call; /* call with which associated */ 78 unsigned long resend_at; /* time in jiffies at which to resend */ 79 union { 80 unsigned offset; /* offset into buffer of next read */ 81 int remain; /* amount of space remaining for next write */ 82 u32 error; /* network error code */ 83 bool need_resend; /* T if needs resending */ 84 }; 85 86 struct rxrpc_header hdr; /* RxRPC packet header from this packet */ 87}; 88 89#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 90 91enum rxrpc_command { 92 RXRPC_CMD_SEND_DATA, /* send data message */ 93 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 94 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 95 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 96}; 97 98/* 99 * RxRPC security module interface 100 */ 101struct rxrpc_security { 102 struct module *owner; /* providing module */ 103 struct list_head link; /* link in master list */ 104 const char *name; /* name of this service */ 105 u8 security_index; /* security type provided */ 106 107 /* initialise a connection's security */ 108 int (*init_connection_security)(struct rxrpc_connection *); 109 110 /* prime a connection's packet security */ 111 void (*prime_packet_security)(struct rxrpc_connection *); 112 113 /* impose security on a packet */ 114 int (*secure_packet)(const struct rxrpc_call *, 115 struct sk_buff *, 116 size_t, 117 void *); 118 119 /* verify the security on a received packet */ 120 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, 121 u32 *); 122 123 /* issue a challenge */ 124 int (*issue_challenge)(struct rxrpc_connection *); 125 126 /* respond to a challenge */ 127 int (*respond_to_challenge)(struct rxrpc_connection *, 128 struct sk_buff *, 129 u32 *); 130 131 /* verify a response */ 132 int (*verify_response)(struct rxrpc_connection *, 133 struct sk_buff *, 134 u32 *); 135 136 /* clear connection security */ 137 void (*clear)(struct rxrpc_connection *); 138}; 139 140/* 141 * RxRPC local transport endpoint definition 142 * - matched by local port, address and protocol type 143 */ 144struct rxrpc_local { 145 struct socket *socket; /* my UDP socket */ 146 struct work_struct destroyer; /* endpoint destroyer */ 147 struct work_struct acceptor; /* incoming call processor */ 148 struct work_struct rejecter; /* packet reject writer */ 149 struct list_head services; /* services listening on this endpoint */ 150 struct list_head link; /* link in endpoint list */ 151 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 152 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 153 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 154 spinlock_t lock; /* access lock */ 155 rwlock_t services_lock; /* lock for services list */ 156 atomic_t usage; 157 int debug_id; /* debug ID for printks */ 158 volatile char error_rcvd; /* T if received ICMP error outstanding */ 159 struct sockaddr_rxrpc srx; /* local address */ 160}; 161 162/* 163 * RxRPC remote transport endpoint definition 164 * - matched by remote port, address and protocol type 165 * - holds the connection ID counter for connections between the two endpoints 166 */ 167struct rxrpc_peer { 168 struct work_struct destroyer; /* peer destroyer */ 169 struct list_head link; /* link in master peer list */ 170 struct list_head error_targets; /* targets for net error distribution */ 171 spinlock_t lock; /* access lock */ 172 atomic_t usage; 173 unsigned if_mtu; /* interface MTU for this peer */ 174 unsigned mtu; /* network MTU for this peer */ 175 unsigned maxdata; /* data size (MTU - hdrsize) */ 176 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 177 int debug_id; /* debug ID for printks */ 178 int net_error; /* network error distributed */ 179 struct sockaddr_rxrpc srx; /* remote address */ 180 181 /* calculated RTT cache */ 182#define RXRPC_RTT_CACHE_SIZE 32 183 suseconds_t rtt; /* current RTT estimate (in uS) */ 184 unsigned rtt_point; /* next entry at which to insert */ 185 unsigned rtt_usage; /* amount of cache actually used */ 186 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 187}; 188 189/* 190 * RxRPC point-to-point transport / connection manager definition 191 * - handles a bundle of connections between two endpoints 192 * - matched by { local, peer } 193 */ 194struct rxrpc_transport { 195 struct rxrpc_local *local; /* local transport endpoint */ 196 struct rxrpc_peer *peer; /* remote transport endpoint */ 197 struct work_struct error_handler; /* network error distributor */ 198 struct rb_root bundles; /* client connection bundles on this transport */ 199 struct rb_root client_conns; /* client connections on this transport */ 200 struct rb_root server_conns; /* server connections on this transport */ 201 struct list_head link; /* link in master session list */ 202 struct sk_buff_head error_queue; /* error packets awaiting processing */ 203 time_t put_time; /* time at which to reap */ 204 spinlock_t client_lock; /* client connection allocation lock */ 205 rwlock_t conn_lock; /* lock for active/dead connections */ 206 atomic_t usage; 207 int debug_id; /* debug ID for printks */ 208 unsigned int conn_idcounter; /* connection ID counter (client) */ 209}; 210 211/* 212 * RxRPC client connection bundle 213 * - matched by { transport, service_id, key } 214 */ 215struct rxrpc_conn_bundle { 216 struct rb_node node; /* node in transport's lookup tree */ 217 struct list_head unused_conns; /* unused connections in this bundle */ 218 struct list_head avail_conns; /* available connections in this bundle */ 219 struct list_head busy_conns; /* busy connections in this bundle */ 220 struct key *key; /* security for this bundle */ 221 wait_queue_head_t chanwait; /* wait for channel to become available */ 222 atomic_t usage; 223 int debug_id; /* debug ID for printks */ 224 unsigned short num_conns; /* number of connections in this bundle */ 225 __be16 service_id; /* service ID */ 226 u8 security_ix; /* security type */ 227}; 228 229/* 230 * RxRPC connection definition 231 * - matched by { transport, service_id, conn_id, direction, key } 232 * - each connection can only handle four simultaneous calls 233 */ 234struct rxrpc_connection { 235 struct rxrpc_transport *trans; /* transport session */ 236 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ 237 struct work_struct processor; /* connection event processor */ 238 struct rb_node node; /* node in transport's lookup tree */ 239 struct list_head link; /* link in master connection list */ 240 struct list_head bundle_link; /* link in bundle */ 241 struct rb_root calls; /* calls on this connection */ 242 struct sk_buff_head rx_queue; /* received conn-level packets */ 243 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ 244 struct rxrpc_security *security; /* applied security module */ 245 struct key *key; /* security for this connection (client) */ 246 struct key *server_key; /* security for this service */ 247 struct crypto_blkcipher *cipher; /* encryption handle */ 248 struct rxrpc_crypt csum_iv; /* packet checksum base */ 249 unsigned long events; 250#define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ 251 time_t put_time; /* time at which to reap */ 252 rwlock_t lock; /* access lock */ 253 spinlock_t state_lock; /* state-change lock */ 254 atomic_t usage; 255 u32 real_conn_id; /* connection ID (host-endian) */ 256 enum { /* current state of connection */ 257 RXRPC_CONN_UNUSED, /* - connection not yet attempted */ 258 RXRPC_CONN_CLIENT, /* - client connection */ 259 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ 260 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ 261 RXRPC_CONN_SERVER, /* - server secured connection */ 262 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ 263 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ 264 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ 265 } state; 266 int error; /* error code for local abort */ 267 int debug_id; /* debug ID for printks */ 268 unsigned call_counter; /* call ID counter */ 269 atomic_t serial; /* packet serial number counter */ 270 atomic_t hi_serial; /* highest serial number received */ 271 u8 avail_calls; /* number of calls available */ 272 u8 size_align; /* data size alignment (for security) */ 273 u8 header_size; /* rxrpc + security header size */ 274 u8 security_size; /* security header size */ 275 u32 security_level; /* security level negotiated */ 276 u32 security_nonce; /* response re-use preventer */ 277 278 /* the following are all in net order */ 279 __be32 epoch; /* epoch of this connection */ 280 __be32 cid; /* connection ID */ 281 __be16 service_id; /* service ID */ 282 u8 security_ix; /* security type */ 283 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ 284 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 285}; 286 287/* 288 * RxRPC call definition 289 * - matched by { connection, call_id } 290 */ 291struct rxrpc_call { 292 struct rxrpc_connection *conn; /* connection carrying call */ 293 struct rxrpc_sock *socket; /* socket responsible */ 294 struct timer_list lifetimer; /* lifetime remaining on call */ 295 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 296 struct timer_list ack_timer; /* ACK generation timer */ 297 struct timer_list resend_timer; /* Tx resend timer */ 298 struct work_struct destroyer; /* call destroyer */ 299 struct work_struct processor; /* packet processor and ACK generator */ 300 struct list_head link; /* link in master call list */ 301 struct list_head error_link; /* link in error distribution list */ 302 struct list_head accept_link; /* calls awaiting acceptance */ 303 struct rb_node sock_node; /* node in socket call tree */ 304 struct rb_node conn_node; /* node in connection call tree */ 305 struct sk_buff_head rx_queue; /* received packets */ 306 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 307 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 308 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 309 unsigned long user_call_ID; /* user-defined call ID */ 310 unsigned long creation_jif; /* time of call creation */ 311 unsigned long flags; 312#define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */ 313#define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */ 314#define RXRPC_CALL_RCVD_LAST 2 /* all packets received */ 315#define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */ 316#define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */ 317#define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */ 318#define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */ 319#define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */ 320#define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */ 321 unsigned long events; 322#define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */ 323#define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */ 324#define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */ 325#define RXRPC_CALL_RCVD_ERROR 3 /* network error received */ 326#define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */ 327#define RXRPC_CALL_ACK 5 /* need to generate ACK */ 328#define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */ 329#define RXRPC_CALL_ABORT 7 /* need to generate abort */ 330#define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */ 331#define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */ 332#define RXRPC_CALL_RESEND 10 /* Tx resend required */ 333#define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */ 334#define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */ 335#define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */ 336#define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */ 337#define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */ 338#define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */ 339 340 spinlock_t lock; 341 rwlock_t state_lock; /* lock for state transition */ 342 atomic_t usage; 343 atomic_t sequence; /* Tx data packet sequence counter */ 344 u32 abort_code; /* local/remote abort code */ 345 enum { /* current state of call */ 346 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 347 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 348 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 349 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 350 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 351 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 352 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 353 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 354 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 355 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 356 RXRPC_CALL_COMPLETE, /* - call completed */ 357 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 358 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 359 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 360 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 361 RXRPC_CALL_DEAD, /* - call is dead */ 362 } state; 363 int debug_id; /* debug ID for printks */ 364 u8 channel; /* connection channel occupied by this call */ 365 366 /* transmission-phase ACK management */ 367 u8 acks_head; /* offset into window of first entry */ 368 u8 acks_tail; /* offset into window of last entry */ 369 u8 acks_winsz; /* size of un-ACK'd window */ 370 u8 acks_unacked; /* lowest unacked packet in last ACK received */ 371 int acks_latest; /* serial number of latest ACK received */ 372 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 373 unsigned long *acks_window; /* sent packet window 374 * - elements are pointers with LSB set if ACK'd 375 */ 376 377 /* receive-phase ACK management */ 378 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 379 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 380 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 381 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 382 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 383 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 384 rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */ 385 u8 ackr_reason; /* reason to ACK */ 386 __be32 ackr_serial; /* serial of packet being ACK'd */ 387 atomic_t ackr_not_idle; /* number of packets in Rx queue */ 388 389 /* received packet records, 1 bit per record */ 390#define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 391 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 392 393 /* the following should all be in net order */ 394 __be32 cid; /* connection ID + channel index */ 395 __be32 call_id; /* call ID on connection */ 396}; 397 398/* 399 * locally abort an RxRPC call 400 */ 401static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 402{ 403 write_lock_bh(&call->state_lock); 404 if (call->state < RXRPC_CALL_COMPLETE) { 405 call->abort_code = abort_code; 406 call->state = RXRPC_CALL_LOCALLY_ABORTED; 407 set_bit(RXRPC_CALL_ABORT, &call->events); 408 } 409 write_unlock_bh(&call->state_lock); 410} 411 412/* 413 * af_rxrpc.c 414 */ 415extern atomic_t rxrpc_n_skbs; 416extern __be32 rxrpc_epoch; 417extern atomic_t rxrpc_debug_id; 418extern struct workqueue_struct *rxrpc_workqueue; 419 420/* 421 * ar-accept.c 422 */ 423extern void rxrpc_accept_incoming_calls(struct work_struct *); 424extern struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, 425 unsigned long); 426extern int rxrpc_reject_call(struct rxrpc_sock *); 427 428/* 429 * ar-ack.c 430 */ 431extern void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); 432extern void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); 433extern void rxrpc_process_call(struct work_struct *); 434 435/* 436 * ar-call.c 437 */ 438extern struct kmem_cache *rxrpc_call_jar; 439extern struct list_head rxrpc_calls; 440extern rwlock_t rxrpc_call_lock; 441 442extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, 443 struct rxrpc_transport *, 444 struct rxrpc_conn_bundle *, 445 unsigned long, int, gfp_t); 446extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 447 struct rxrpc_connection *, 448 struct rxrpc_header *, gfp_t); 449extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, 450 unsigned long); 451extern void rxrpc_release_call(struct rxrpc_call *); 452extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 453extern void __rxrpc_put_call(struct rxrpc_call *); 454extern void __exit rxrpc_destroy_all_calls(void); 455 456/* 457 * ar-connection.c 458 */ 459extern struct list_head rxrpc_connections; 460extern rwlock_t rxrpc_connection_lock; 461 462extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, 463 struct rxrpc_transport *, 464 struct key *, 465 __be16, gfp_t); 466extern void rxrpc_put_bundle(struct rxrpc_transport *, 467 struct rxrpc_conn_bundle *); 468extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, 469 struct rxrpc_conn_bundle *, struct rxrpc_call *, 470 gfp_t); 471extern void rxrpc_put_connection(struct rxrpc_connection *); 472extern void __exit rxrpc_destroy_all_connections(void); 473extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, 474 struct rxrpc_header *); 475extern struct rxrpc_connection * 476rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *, 477 gfp_t); 478 479/* 480 * ar-connevent.c 481 */ 482extern void rxrpc_process_connection(struct work_struct *); 483extern void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 484extern void rxrpc_reject_packets(struct work_struct *); 485 486/* 487 * ar-error.c 488 */ 489extern void rxrpc_UDP_error_report(struct sock *); 490extern void rxrpc_UDP_error_handler(struct work_struct *); 491 492/* 493 * ar-input.c 494 */ 495extern unsigned long rxrpc_ack_timeout; 496extern const char *rxrpc_pkts[]; 497 498extern void rxrpc_data_ready(struct sock *, int); 499extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, 500 bool); 501extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 502 503/* 504 * ar-local.c 505 */ 506extern rwlock_t rxrpc_local_lock; 507extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); 508extern void rxrpc_put_local(struct rxrpc_local *); 509extern void __exit rxrpc_destroy_all_locals(void); 510 511/* 512 * ar-key.c 513 */ 514extern struct key_type key_type_rxrpc; 515extern struct key_type key_type_rxrpc_s; 516 517extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 518extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 519extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, 520 time_t, u32); 521 522/* 523 * ar-output.c 524 */ 525extern int rxrpc_resend_timeout; 526 527extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); 528extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *, 529 struct rxrpc_transport *, struct msghdr *, 530 size_t); 531extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *, 532 struct msghdr *, size_t); 533 534/* 535 * ar-peer.c 536 */ 537extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); 538extern void rxrpc_put_peer(struct rxrpc_peer *); 539extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, 540 __be32, __be16); 541extern void __exit rxrpc_destroy_all_peers(void); 542 543/* 544 * ar-proc.c 545 */ 546extern const char *const rxrpc_call_states[]; 547extern const struct file_operations rxrpc_call_seq_fops; 548extern const struct file_operations rxrpc_connection_seq_fops; 549 550/* 551 * ar-recvmsg.c 552 */ 553extern void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 554extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *, 555 size_t, int); 556 557/* 558 * ar-security.c 559 */ 560extern int rxrpc_register_security(struct rxrpc_security *); 561extern void rxrpc_unregister_security(struct rxrpc_security *); 562extern int rxrpc_init_client_conn_security(struct rxrpc_connection *); 563extern int rxrpc_init_server_conn_security(struct rxrpc_connection *); 564extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, 565 size_t, void *); 566extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, 567 u32 *); 568extern void rxrpc_clear_conn_security(struct rxrpc_connection *); 569 570/* 571 * ar-skbuff.c 572 */ 573extern void rxrpc_packet_destructor(struct sk_buff *); 574 575/* 576 * ar-transport.c 577 */ 578extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, 579 struct rxrpc_peer *, 580 gfp_t); 581extern void rxrpc_put_transport(struct rxrpc_transport *); 582extern void __exit rxrpc_destroy_all_transports(void); 583extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, 584 struct rxrpc_peer *); 585 586/* 587 * debug tracing 588 */ 589extern unsigned rxrpc_debug; 590 591#define dbgprintk(FMT,...) \ 592 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 593 594#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 595#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 596#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 597#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 598#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 599 600 601#if defined(__KDEBUG) 602#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 603#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 604#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 605#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 606#define _net(FMT,...) knet(FMT,##__VA_ARGS__) 607 608#elif defined(CONFIG_AF_RXRPC_DEBUG) 609#define RXRPC_DEBUG_KENTER 0x01 610#define RXRPC_DEBUG_KLEAVE 0x02 611#define RXRPC_DEBUG_KDEBUG 0x04 612#define RXRPC_DEBUG_KPROTO 0x08 613#define RXRPC_DEBUG_KNET 0x10 614 615#define _enter(FMT,...) \ 616do { \ 617 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 618 kenter(FMT,##__VA_ARGS__); \ 619} while (0) 620 621#define _leave(FMT,...) \ 622do { \ 623 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 624 kleave(FMT,##__VA_ARGS__); \ 625} while (0) 626 627#define _debug(FMT,...) \ 628do { \ 629 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 630 kdebug(FMT,##__VA_ARGS__); \ 631} while (0) 632 633#define _proto(FMT,...) \ 634do { \ 635 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 636 kproto(FMT,##__VA_ARGS__); \ 637} while (0) 638 639#define _net(FMT,...) \ 640do { \ 641 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 642 knet(FMT,##__VA_ARGS__); \ 643} while (0) 644 645#else 646#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 647#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 648#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 649#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 650#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 651#endif 652 653/* 654 * debug assertion checking 655 */ 656 657#define ASSERT(X) \ 658do { \ 659 if (unlikely(!(X))) { \ 660 printk(KERN_ERR "\n"); \ 661 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 662 BUG(); \ 663 } \ 664} while(0) 665 666#define ASSERTCMP(X, OP, Y) \ 667do { \ 668 if (unlikely(!((X) OP (Y)))) { \ 669 printk(KERN_ERR "\n"); \ 670 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 671 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 672 (unsigned long)(X), (unsigned long)(Y)); \ 673 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 674 (unsigned long)(X), (unsigned long)(Y)); \ 675 BUG(); \ 676 } \ 677} while(0) 678 679#define ASSERTIF(C, X) \ 680do { \ 681 if (unlikely((C) && !(X))) { \ 682 printk(KERN_ERR "\n"); \ 683 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 684 BUG(); \ 685 } \ 686} while(0) 687 688#define ASSERTIFCMP(C, X, OP, Y) \ 689do { \ 690 if (unlikely((C) && !((X) OP (Y)))) { \ 691 printk(KERN_ERR "\n"); \ 692 printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 693 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 694 (unsigned long)(X), (unsigned long)(Y)); \ 695 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 696 (unsigned long)(X), (unsigned long)(Y)); \ 697 BUG(); \ 698 } \ 699} while(0) 700 701/* 702 * socket buffer accounting / leak finding 703 */ 704static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) 705{ 706 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 707 //atomic_inc(&rxrpc_n_skbs); 708} 709 710#define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) 711 712static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) 713{ 714 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 715 //atomic_dec(&rxrpc_n_skbs); 716} 717 718#define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) 719 720static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) 721{ 722 if (skb) { 723 CHECK_SLAB_OKAY(&skb->users); 724 //_net("free skb %p %s [%d]", 725 // skb, fn, atomic_read(&rxrpc_n_skbs)); 726 //atomic_dec(&rxrpc_n_skbs); 727 kfree_skb(skb); 728 } 729} 730 731#define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) 732 733static inline void rxrpc_purge_queue(struct sk_buff_head *list) 734{ 735 struct sk_buff *skb; 736 while ((skb = skb_dequeue((list))) != NULL) 737 rxrpc_free_skb(skb); 738} 739 740static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) 741{ 742 CHECK_SLAB_OKAY(&local->usage); 743 if (atomic_inc_return(&local->usage) == 1) 744 printk("resurrected (%s)\n", f); 745} 746 747#define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) 748 749#define rxrpc_get_call(CALL) \ 750do { \ 751 CHECK_SLAB_OKAY(&(CALL)->usage); \ 752 if (atomic_inc_return(&(CALL)->usage) == 1) \ 753 BUG(); \ 754} while(0) 755 756#define rxrpc_put_call(CALL) \ 757do { \ 758 __rxrpc_put_call(CALL); \ 759} while(0) 760