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 <linux/atomic.h> 13 #include <linux/seqlock.h> 14 #include <net/net_namespace.h> 15 #include <net/netns/generic.h> 16 #include <net/sock.h> 17 #include <net/af_rxrpc.h> 18 #include "protocol.h" 19 20 #if 0 21 #define CHECK_SLAB_OKAY(X) \ 22 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 23 (POISON_FREE << 8 | POISON_FREE)) 24 #else 25 #define CHECK_SLAB_OKAY(X) do {} while (0) 26 #endif 27 28 #define FCRYPT_BSIZE 8 29 struct rxrpc_crypt { 30 union { 31 u8 x[FCRYPT_BSIZE]; 32 __be32 n[2]; 33 }; 34 } __attribute__((aligned(8))); 35 36 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 37 #define rxrpc_queue_delayed_work(WS,D) \ 38 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 39 40 struct rxrpc_connection; 41 42 /* 43 * Mark applied to socket buffers. 44 */ 45 enum rxrpc_skb_mark { 46 RXRPC_SKB_MARK_DATA, /* data message */ 47 RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ 48 RXRPC_SKB_MARK_BUSY, /* server busy message */ 49 RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ 50 RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ 51 RXRPC_SKB_MARK_NET_ERROR, /* network error message */ 52 RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ 53 RXRPC_SKB_MARK_NEW_CALL, /* local error message */ 54 }; 55 56 /* 57 * sk_state for RxRPC sockets 58 */ 59 enum { 60 RXRPC_UNBOUND = 0, 61 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 62 RXRPC_CLIENT_BOUND, /* client local address bound */ 63 RXRPC_SERVER_BOUND, /* server local address bound */ 64 RXRPC_SERVER_BOUND2, /* second server local address bound */ 65 RXRPC_SERVER_LISTENING, /* server listening for connections */ 66 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 67 RXRPC_CLOSE, /* socket is being closed */ 68 }; 69 70 /* 71 * Per-network namespace data. 72 */ 73 struct rxrpc_net { 74 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 75 u32 epoch; /* Local epoch for detecting local-end reset */ 76 struct list_head calls; /* List of calls active in this namespace */ 77 rwlock_t call_lock; /* Lock for ->calls */ 78 atomic_t nr_calls; /* Count of allocated calls */ 79 80 atomic_t nr_conns; 81 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 82 struct list_head service_conns; /* Service conns in this namespace */ 83 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 84 struct work_struct service_conn_reaper; 85 struct timer_list service_conn_reap_timer; 86 87 unsigned int nr_client_conns; 88 unsigned int nr_active_client_conns; 89 bool kill_all_client_conns; 90 bool live; 91 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 92 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 93 struct list_head waiting_client_conns; 94 struct list_head active_client_conns; 95 struct list_head idle_client_conns; 96 struct work_struct client_conn_reaper; 97 struct timer_list client_conn_reap_timer; 98 99 struct list_head local_endpoints; 100 struct mutex local_mutex; /* Lock for ->local_endpoints */ 101 102 DECLARE_HASHTABLE (peer_hash, 10); 103 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 104 105 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 106 u8 peer_keepalive_cursor; 107 time64_t peer_keepalive_base; 108 struct list_head peer_keepalive[32]; 109 struct list_head peer_keepalive_new; 110 struct timer_list peer_keepalive_timer; 111 struct work_struct peer_keepalive_work; 112 }; 113 114 /* 115 * Service backlog preallocation. 116 * 117 * This contains circular buffers of preallocated peers, connections and calls 118 * for incoming service calls and their head and tail pointers. This allows 119 * calls to be set up in the data_ready handler, thereby avoiding the need to 120 * shuffle packets around so much. 121 */ 122 struct rxrpc_backlog { 123 unsigned short peer_backlog_head; 124 unsigned short peer_backlog_tail; 125 unsigned short conn_backlog_head; 126 unsigned short conn_backlog_tail; 127 unsigned short call_backlog_head; 128 unsigned short call_backlog_tail; 129 #define RXRPC_BACKLOG_MAX 32 130 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 131 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 132 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 133 }; 134 135 /* 136 * RxRPC socket definition 137 */ 138 struct rxrpc_sock { 139 /* WARNING: sk has to be the first member */ 140 struct sock sk; 141 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 142 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 143 struct rxrpc_local *local; /* local endpoint */ 144 struct rxrpc_backlog *backlog; /* Preallocation for services */ 145 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 146 struct list_head sock_calls; /* List of calls owned by this socket */ 147 struct list_head to_be_accepted; /* calls awaiting acceptance */ 148 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 149 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 150 struct key *key; /* security for this socket */ 151 struct key *securities; /* list of server security descriptors */ 152 struct rb_root calls; /* User ID -> call mapping */ 153 unsigned long flags; 154 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 155 rwlock_t call_lock; /* lock for calls */ 156 u32 min_sec_level; /* minimum security level */ 157 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 158 bool exclusive; /* Exclusive connection for a client socket */ 159 u16 second_service; /* Additional service bound to the endpoint */ 160 struct { 161 /* Service upgrade information */ 162 u16 from; /* Service ID to upgrade (if not 0) */ 163 u16 to; /* service ID to upgrade to */ 164 } service_upgrade; 165 sa_family_t family; /* Protocol family created with */ 166 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 167 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 168 }; 169 170 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 171 172 /* 173 * CPU-byteorder normalised Rx packet header. 174 */ 175 struct rxrpc_host_header { 176 u32 epoch; /* client boot timestamp */ 177 u32 cid; /* connection and channel ID */ 178 u32 callNumber; /* call ID (0 for connection-level packets) */ 179 u32 seq; /* sequence number of pkt in call stream */ 180 u32 serial; /* serial number of pkt sent to network */ 181 u8 type; /* packet type */ 182 u8 flags; /* packet flags */ 183 u8 userStatus; /* app-layer defined status */ 184 u8 securityIndex; /* security protocol ID */ 185 union { 186 u16 _rsvd; /* reserved */ 187 u16 cksum; /* kerberos security checksum */ 188 }; 189 u16 serviceId; /* service ID */ 190 } __packed; 191 192 /* 193 * RxRPC socket buffer private variables 194 * - max 48 bytes (struct sk_buff::cb) 195 */ 196 struct rxrpc_skb_priv { 197 union { 198 u8 nr_jumbo; /* Number of jumbo subpackets */ 199 }; 200 union { 201 int remain; /* amount of space remaining for next write */ 202 }; 203 204 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 205 }; 206 207 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 208 209 /* 210 * RxRPC security module interface 211 */ 212 struct rxrpc_security { 213 const char *name; /* name of this service */ 214 u8 security_index; /* security type provided */ 215 216 /* Initialise a security service */ 217 int (*init)(void); 218 219 /* Clean up a security service */ 220 void (*exit)(void); 221 222 /* initialise a connection's security */ 223 int (*init_connection_security)(struct rxrpc_connection *); 224 225 /* prime a connection's packet security */ 226 int (*prime_packet_security)(struct rxrpc_connection *); 227 228 /* impose security on a packet */ 229 int (*secure_packet)(struct rxrpc_call *, 230 struct sk_buff *, 231 size_t, 232 void *); 233 234 /* verify the security on a received packet */ 235 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 236 unsigned int, unsigned int, rxrpc_seq_t, u16); 237 238 /* Locate the data in a received packet that has been verified. */ 239 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 240 unsigned int *, unsigned int *); 241 242 /* issue a challenge */ 243 int (*issue_challenge)(struct rxrpc_connection *); 244 245 /* respond to a challenge */ 246 int (*respond_to_challenge)(struct rxrpc_connection *, 247 struct sk_buff *, 248 u32 *); 249 250 /* verify a response */ 251 int (*verify_response)(struct rxrpc_connection *, 252 struct sk_buff *, 253 u32 *); 254 255 /* clear connection security */ 256 void (*clear)(struct rxrpc_connection *); 257 }; 258 259 /* 260 * RxRPC local transport endpoint description 261 * - owned by a single AF_RXRPC socket 262 * - pointed to by transport socket struct sk_user_data 263 */ 264 struct rxrpc_local { 265 struct rcu_head rcu; 266 atomic_t usage; 267 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 268 struct list_head link; 269 struct socket *socket; /* my UDP socket */ 270 struct work_struct processor; 271 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 272 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 273 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 274 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 275 struct rb_root client_conns; /* Client connections by socket params */ 276 spinlock_t client_conns_lock; /* Lock for client_conns */ 277 spinlock_t lock; /* access lock */ 278 rwlock_t services_lock; /* lock for services list */ 279 int debug_id; /* debug ID for printks */ 280 bool dead; 281 bool service_closed; /* Service socket closed */ 282 struct sockaddr_rxrpc srx; /* local address */ 283 }; 284 285 /* 286 * RxRPC remote transport endpoint definition 287 * - matched by local endpoint, remote port, address and protocol type 288 */ 289 struct rxrpc_peer { 290 struct rcu_head rcu; /* This must be first */ 291 atomic_t usage; 292 unsigned long hash_key; 293 struct hlist_node hash_link; 294 struct rxrpc_local *local; 295 struct hlist_head error_targets; /* targets for net error distribution */ 296 struct work_struct error_distributor; 297 struct rb_root service_conns; /* Service connections */ 298 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 299 time64_t last_tx_at; /* Last time packet sent here */ 300 seqlock_t service_conn_lock; 301 spinlock_t lock; /* access lock */ 302 unsigned int if_mtu; /* interface MTU for this peer */ 303 unsigned int mtu; /* network MTU for this peer */ 304 unsigned int maxdata; /* data size (MTU - hdrsize) */ 305 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 306 int debug_id; /* debug ID for printks */ 307 int error_report; /* Net (+0) or local (+1000000) to distribute */ 308 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 309 struct sockaddr_rxrpc srx; /* remote address */ 310 311 /* calculated RTT cache */ 312 #define RXRPC_RTT_CACHE_SIZE 32 313 ktime_t rtt_last_req; /* Time of last RTT request */ 314 u64 rtt; /* Current RTT estimate (in nS) */ 315 u64 rtt_sum; /* Sum of cache contents */ 316 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 317 u8 rtt_cursor; /* next entry at which to insert */ 318 u8 rtt_usage; /* amount of cache actually used */ 319 320 u8 cong_cwnd; /* Congestion window size */ 321 }; 322 323 /* 324 * Keys for matching a connection. 325 */ 326 struct rxrpc_conn_proto { 327 union { 328 struct { 329 u32 epoch; /* epoch of this connection */ 330 u32 cid; /* connection ID */ 331 }; 332 u64 index_key; 333 }; 334 }; 335 336 struct rxrpc_conn_parameters { 337 struct rxrpc_local *local; /* Representation of local endpoint */ 338 struct rxrpc_peer *peer; /* Remote endpoint */ 339 struct key *key; /* Security details */ 340 bool exclusive; /* T if conn is exclusive */ 341 bool upgrade; /* T if service ID can be upgraded */ 342 u16 service_id; /* Service ID for this connection */ 343 u32 security_level; /* Security level selected */ 344 }; 345 346 /* 347 * Bits in the connection flags. 348 */ 349 enum rxrpc_conn_flag { 350 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 351 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 352 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 353 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 354 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 355 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 356 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 357 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 358 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 359 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 360 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 361 }; 362 363 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 364 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 365 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 366 (1UL << RXRPC_CONN_FINAL_ACK_3)) 367 368 /* 369 * Events that can be raised upon a connection. 370 */ 371 enum rxrpc_conn_event { 372 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 373 }; 374 375 /* 376 * The connection cache state. 377 */ 378 enum rxrpc_conn_cache_state { 379 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 380 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 381 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 382 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 383 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 384 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 385 RXRPC_CONN__NR_CACHE_STATES 386 }; 387 388 /* 389 * The connection protocol state. 390 */ 391 enum rxrpc_conn_proto_state { 392 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 393 RXRPC_CONN_CLIENT, /* Client connection */ 394 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 395 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 396 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 397 RXRPC_CONN_SERVICE, /* Service secured connection */ 398 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 399 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 400 RXRPC_CONN__NR_STATES 401 }; 402 403 /* 404 * RxRPC connection definition 405 * - matched by { local, peer, epoch, conn_id, direction } 406 * - each connection can only handle four simultaneous calls 407 */ 408 struct rxrpc_connection { 409 struct rxrpc_conn_proto proto; 410 struct rxrpc_conn_parameters params; 411 412 atomic_t usage; 413 struct rcu_head rcu; 414 struct list_head cache_link; 415 416 spinlock_t channel_lock; 417 unsigned char active_chans; /* Mask of active channels */ 418 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 419 struct list_head waiting_calls; /* Calls waiting for channels */ 420 struct rxrpc_channel { 421 unsigned long final_ack_at; /* Time at which to issue final ACK */ 422 struct rxrpc_call __rcu *call; /* Active call */ 423 unsigned int call_debug_id; /* call->debug_id */ 424 u32 call_id; /* ID of current call */ 425 u32 call_counter; /* Call ID counter */ 426 u32 last_call; /* ID of last call */ 427 u8 last_type; /* Type of last packet */ 428 union { 429 u32 last_seq; 430 u32 last_abort; 431 }; 432 } channels[RXRPC_MAXCALLS]; 433 434 struct timer_list timer; /* Conn event timer */ 435 struct work_struct processor; /* connection event processor */ 436 union { 437 struct rb_node client_node; /* Node in local->client_conns */ 438 struct rb_node service_node; /* Node in peer->service_conns */ 439 }; 440 struct list_head proc_link; /* link in procfs list */ 441 struct list_head link; /* link in master connection list */ 442 struct sk_buff_head rx_queue; /* received conn-level packets */ 443 const struct rxrpc_security *security; /* applied security module */ 444 struct key *server_key; /* security for this service */ 445 struct crypto_skcipher *cipher; /* encryption handle */ 446 struct rxrpc_crypt csum_iv; /* packet checksum base */ 447 unsigned long flags; 448 unsigned long events; 449 unsigned long idle_timestamp; /* Time at which last became idle */ 450 spinlock_t state_lock; /* state-change lock */ 451 enum rxrpc_conn_cache_state cache_state; 452 enum rxrpc_conn_proto_state state; /* current state of connection */ 453 u32 local_abort; /* local abort code */ 454 u32 remote_abort; /* remote abort code */ 455 int debug_id; /* debug ID for printks */ 456 atomic_t serial; /* packet serial number counter */ 457 unsigned int hi_serial; /* highest serial number received */ 458 u32 security_nonce; /* response re-use preventer */ 459 u16 service_id; /* Service ID, possibly upgraded */ 460 u8 size_align; /* data size alignment (for security) */ 461 u8 security_size; /* security header size */ 462 u8 security_ix; /* security type */ 463 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 464 }; 465 466 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 467 { 468 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 469 } 470 471 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 472 { 473 return !rxrpc_to_server(sp); 474 } 475 476 /* 477 * Flags in call->flags. 478 */ 479 enum rxrpc_call_flag { 480 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 481 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 482 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 483 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 484 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 485 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 486 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 487 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 488 RXRPC_CALL_PINGING, /* Ping in process */ 489 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 490 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 491 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 492 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 493 }; 494 495 /* 496 * Events that can be raised on a call. 497 */ 498 enum rxrpc_call_event { 499 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 500 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 501 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 502 RXRPC_CALL_EV_PING, /* Ping send required */ 503 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 504 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 505 }; 506 507 /* 508 * The states that a call can be in. 509 */ 510 enum rxrpc_call_state { 511 RXRPC_CALL_UNINITIALISED, 512 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 513 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 514 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 515 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 516 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 517 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 518 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 519 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 520 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 521 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 522 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 523 RXRPC_CALL_COMPLETE, /* - call complete */ 524 NR__RXRPC_CALL_STATES 525 }; 526 527 /* 528 * Call Tx congestion management modes. 529 */ 530 enum rxrpc_congest_mode { 531 RXRPC_CALL_SLOW_START, 532 RXRPC_CALL_CONGEST_AVOIDANCE, 533 RXRPC_CALL_PACKET_LOSS, 534 RXRPC_CALL_FAST_RETRANSMIT, 535 NR__RXRPC_CONGEST_MODES 536 }; 537 538 /* 539 * RxRPC call definition 540 * - matched by { connection, call_id } 541 */ 542 struct rxrpc_call { 543 struct rcu_head rcu; 544 struct rxrpc_connection *conn; /* connection carrying call */ 545 struct rxrpc_peer *peer; /* Peer record for remote address */ 546 struct rxrpc_sock __rcu *socket; /* socket responsible */ 547 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 548 struct mutex user_mutex; /* User access mutex */ 549 unsigned long ack_at; /* When deferred ACK needs to happen */ 550 unsigned long ack_lost_at; /* When ACK is figured as lost */ 551 unsigned long resend_at; /* When next resend needs to happen */ 552 unsigned long ping_at; /* When next to send a ping */ 553 unsigned long keepalive_at; /* When next to send a keepalive ping */ 554 unsigned long expect_rx_by; /* When we expect to get a packet by */ 555 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 556 unsigned long expect_term_by; /* When we expect call termination by */ 557 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 558 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 559 struct timer_list timer; /* Combined event timer */ 560 struct work_struct processor; /* Event processor */ 561 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 562 struct list_head link; /* link in master call list */ 563 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 564 struct hlist_node error_link; /* link in error distribution list */ 565 struct list_head accept_link; /* Link in rx->acceptq */ 566 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 567 struct list_head sock_link; /* Link in rx->sock_calls */ 568 struct rb_node sock_node; /* Node in rx->calls */ 569 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 570 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 571 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 572 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 573 unsigned long user_call_ID; /* user-defined call ID */ 574 unsigned long flags; 575 unsigned long events; 576 spinlock_t lock; 577 spinlock_t notify_lock; /* Kernel notification lock */ 578 rwlock_t state_lock; /* lock for state transition */ 579 u32 abort_code; /* Local/remote abort code */ 580 int error; /* Local error incurred */ 581 enum rxrpc_call_state state; /* current state of call */ 582 enum rxrpc_call_completion completion; /* Call completion condition */ 583 atomic_t usage; 584 u16 service_id; /* service ID */ 585 u8 security_ix; /* Security type */ 586 u32 call_id; /* call ID on connection */ 587 u32 cid; /* connection ID plus channel index */ 588 int debug_id; /* debug ID for printks */ 589 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 590 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 591 592 /* Rx/Tx circular buffer, depending on phase. 593 * 594 * In the Rx phase, packets are annotated with 0 or the number of the 595 * segment of a jumbo packet each buffer refers to. There can be up to 596 * 47 segments in a maximum-size UDP packet. 597 * 598 * In the Tx phase, packets are annotated with which buffers have been 599 * acked. 600 */ 601 #define RXRPC_RXTX_BUFF_SIZE 64 602 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 603 #define RXRPC_INIT_RX_WINDOW_SIZE 63 604 struct sk_buff **rxtx_buffer; 605 u8 *rxtx_annotations; 606 #define RXRPC_TX_ANNO_ACK 0 607 #define RXRPC_TX_ANNO_UNACK 1 608 #define RXRPC_TX_ANNO_NAK 2 609 #define RXRPC_TX_ANNO_RETRANS 3 610 #define RXRPC_TX_ANNO_MASK 0x03 611 #define RXRPC_TX_ANNO_LAST 0x04 612 #define RXRPC_TX_ANNO_RESENT 0x08 613 614 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 615 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 616 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 617 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 618 * not hard-ACK'd packet follows this. 619 */ 620 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 621 622 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 623 * is fixed, we keep these numbers in terms of segments (ie. DATA 624 * packets) rather than bytes. 625 */ 626 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 627 u8 cong_cwnd; /* Congestion window size */ 628 u8 cong_extra; /* Extra to send for congestion management */ 629 u8 cong_ssthresh; /* Slow-start threshold */ 630 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 631 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 632 u8 cong_cumul_acks; /* Cumulative ACK count */ 633 ktime_t cong_tstamp; /* Last time cwnd was changed */ 634 635 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 636 * consumed packet follows this. 637 */ 638 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 639 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 640 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 641 u8 rx_winsize; /* Size of Rx window */ 642 u8 tx_winsize; /* Maximum size of Tx window */ 643 bool tx_phase; /* T if transmission phase, F if receive phase */ 644 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 645 646 /* receive-phase ACK management */ 647 u8 ackr_reason; /* reason to ACK */ 648 u16 ackr_skew; /* skew on packet being ACK'd */ 649 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 650 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 651 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 652 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 653 654 /* ping management */ 655 rxrpc_serial_t ping_serial; /* Last ping sent */ 656 ktime_t ping_time; /* Time last ping sent */ 657 658 /* transmission-phase ACK management */ 659 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 660 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 661 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 662 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 663 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 664 }; 665 666 /* 667 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 668 */ 669 struct rxrpc_ack_summary { 670 u8 ack_reason; 671 u8 nr_acks; /* Number of ACKs in packet */ 672 u8 nr_nacks; /* Number of NACKs in packet */ 673 u8 nr_new_acks; /* Number of new ACKs in packet */ 674 u8 nr_new_nacks; /* Number of new NACKs in packet */ 675 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 676 bool new_low_nack; /* T if new low NACK found */ 677 bool retrans_timeo; /* T if reTx due to timeout happened */ 678 u8 flight_size; /* Number of unreceived transmissions */ 679 /* Place to stash values for tracing */ 680 enum rxrpc_congest_mode mode:8; 681 u8 cwnd; 682 u8 ssthresh; 683 u8 dup_acks; 684 u8 cumulative_acks; 685 }; 686 687 /* 688 * sendmsg() cmsg-specified parameters. 689 */ 690 enum rxrpc_command { 691 RXRPC_CMD_SEND_DATA, /* send data message */ 692 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 693 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 694 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 695 }; 696 697 struct rxrpc_call_params { 698 s64 tx_total_len; /* Total Tx data length (if send data) */ 699 unsigned long user_call_ID; /* User's call ID */ 700 struct { 701 u32 hard; /* Maximum lifetime (sec) */ 702 u32 idle; /* Max time since last data packet (msec) */ 703 u32 normal; /* Max time since last call packet (msec) */ 704 } timeouts; 705 u8 nr_timeouts; /* Number of timeouts specified */ 706 }; 707 708 struct rxrpc_send_params { 709 struct rxrpc_call_params call; 710 u32 abort_code; /* Abort code to Tx (if abort) */ 711 enum rxrpc_command command : 8; /* The command to implement */ 712 bool exclusive; /* Shared or exclusive call */ 713 bool upgrade; /* If the connection is upgradeable */ 714 }; 715 716 #include <trace/events/rxrpc.h> 717 718 /* 719 * af_rxrpc.c 720 */ 721 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 722 extern struct workqueue_struct *rxrpc_workqueue; 723 724 /* 725 * call_accept.c 726 */ 727 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 728 void rxrpc_discard_prealloc(struct rxrpc_sock *); 729 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 730 struct rxrpc_connection *, 731 struct sk_buff *); 732 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 733 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 734 rxrpc_notify_rx_t); 735 int rxrpc_reject_call(struct rxrpc_sock *); 736 737 /* 738 * call_event.c 739 */ 740 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 741 enum rxrpc_propose_ack_trace); 742 void rxrpc_process_call(struct work_struct *); 743 744 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 745 unsigned long expire_at, 746 unsigned long now, 747 enum rxrpc_timer_trace why) 748 { 749 trace_rxrpc_timer(call, why, now); 750 timer_reduce(&call->timer, expire_at); 751 } 752 753 /* 754 * call_object.c 755 */ 756 extern const char *const rxrpc_call_states[]; 757 extern const char *const rxrpc_call_completions[]; 758 extern unsigned int rxrpc_max_call_lifetime; 759 extern struct kmem_cache *rxrpc_call_jar; 760 761 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 762 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 763 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 764 struct rxrpc_conn_parameters *, 765 struct sockaddr_rxrpc *, 766 struct rxrpc_call_params *, gfp_t, 767 unsigned int); 768 int rxrpc_retry_client_call(struct rxrpc_sock *, 769 struct rxrpc_call *, 770 struct rxrpc_conn_parameters *, 771 struct sockaddr_rxrpc *, 772 gfp_t); 773 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 774 struct sk_buff *); 775 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 776 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 777 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 778 bool __rxrpc_queue_call(struct rxrpc_call *); 779 bool rxrpc_queue_call(struct rxrpc_call *); 780 void rxrpc_see_call(struct rxrpc_call *); 781 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 782 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 783 void rxrpc_cleanup_call(struct rxrpc_call *); 784 void rxrpc_destroy_all_calls(struct rxrpc_net *); 785 786 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 787 { 788 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 789 } 790 791 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 792 { 793 return !rxrpc_is_service_call(call); 794 } 795 796 /* 797 * Transition a call to the complete state. 798 */ 799 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 800 enum rxrpc_call_completion compl, 801 u32 abort_code, 802 int error) 803 { 804 if (call->state < RXRPC_CALL_COMPLETE) { 805 call->abort_code = abort_code; 806 call->error = error; 807 call->completion = compl, 808 call->state = RXRPC_CALL_COMPLETE; 809 trace_rxrpc_call_complete(call); 810 wake_up(&call->waitq); 811 return true; 812 } 813 return false; 814 } 815 816 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 817 enum rxrpc_call_completion compl, 818 u32 abort_code, 819 int error) 820 { 821 bool ret; 822 823 write_lock_bh(&call->state_lock); 824 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 825 write_unlock_bh(&call->state_lock); 826 return ret; 827 } 828 829 /* 830 * Record that a call successfully completed. 831 */ 832 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 833 { 834 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 835 } 836 837 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 838 { 839 bool ret; 840 841 write_lock_bh(&call->state_lock); 842 ret = __rxrpc_call_completed(call); 843 write_unlock_bh(&call->state_lock); 844 return ret; 845 } 846 847 /* 848 * Record that a call is locally aborted. 849 */ 850 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 851 rxrpc_seq_t seq, 852 u32 abort_code, int error) 853 { 854 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 855 abort_code, error); 856 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 857 abort_code, error); 858 } 859 860 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 861 rxrpc_seq_t seq, u32 abort_code, int error) 862 { 863 bool ret; 864 865 write_lock_bh(&call->state_lock); 866 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 867 write_unlock_bh(&call->state_lock); 868 return ret; 869 } 870 871 /* 872 * Abort a call due to a protocol error. 873 */ 874 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 875 struct sk_buff *skb, 876 const char *eproto_why, 877 const char *why, 878 u32 abort_code) 879 { 880 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 881 882 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 883 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 884 } 885 886 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 887 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 888 (abort_why), (abort_code)) 889 890 /* 891 * conn_client.c 892 */ 893 extern unsigned int rxrpc_max_client_connections; 894 extern unsigned int rxrpc_reap_client_connections; 895 extern unsigned long rxrpc_conn_idle_client_expiry; 896 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 897 extern struct idr rxrpc_client_conn_ids; 898 899 void rxrpc_destroy_client_conn_ids(void); 900 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 901 struct sockaddr_rxrpc *, gfp_t); 902 void rxrpc_expose_client_call(struct rxrpc_call *); 903 void rxrpc_disconnect_client_call(struct rxrpc_call *); 904 void rxrpc_put_client_conn(struct rxrpc_connection *); 905 void rxrpc_discard_expired_client_conns(struct work_struct *); 906 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 907 908 /* 909 * conn_event.c 910 */ 911 void rxrpc_process_connection(struct work_struct *); 912 913 /* 914 * conn_object.c 915 */ 916 extern unsigned int rxrpc_connection_expiry; 917 extern unsigned int rxrpc_closed_conn_expiry; 918 919 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 920 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 921 struct sk_buff *); 922 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 923 void rxrpc_disconnect_call(struct rxrpc_call *); 924 void rxrpc_kill_connection(struct rxrpc_connection *); 925 bool rxrpc_queue_conn(struct rxrpc_connection *); 926 void rxrpc_see_connection(struct rxrpc_connection *); 927 void rxrpc_get_connection(struct rxrpc_connection *); 928 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 929 void rxrpc_put_service_conn(struct rxrpc_connection *); 930 void rxrpc_service_connection_reaper(struct work_struct *); 931 void rxrpc_destroy_all_connections(struct rxrpc_net *); 932 933 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 934 { 935 return conn->out_clientflag; 936 } 937 938 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 939 { 940 return !rxrpc_conn_is_client(conn); 941 } 942 943 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 944 { 945 if (!conn) 946 return; 947 948 if (rxrpc_conn_is_client(conn)) 949 rxrpc_put_client_conn(conn); 950 else 951 rxrpc_put_service_conn(conn); 952 } 953 954 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 955 unsigned long expire_at) 956 { 957 timer_reduce(&conn->timer, expire_at); 958 } 959 960 /* 961 * conn_service.c 962 */ 963 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 964 struct sk_buff *); 965 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 966 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 967 struct rxrpc_connection *, struct sk_buff *); 968 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 969 970 /* 971 * input.c 972 */ 973 void rxrpc_data_ready(struct sock *); 974 975 /* 976 * insecure.c 977 */ 978 extern const struct rxrpc_security rxrpc_no_security; 979 980 /* 981 * key.c 982 */ 983 extern struct key_type key_type_rxrpc; 984 extern struct key_type key_type_rxrpc_s; 985 986 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 987 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 988 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 989 u32); 990 991 /* 992 * local_event.c 993 */ 994 extern void rxrpc_process_local_events(struct rxrpc_local *); 995 996 /* 997 * local_object.c 998 */ 999 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 1000 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 1001 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 1002 void rxrpc_put_local(struct rxrpc_local *); 1003 void rxrpc_queue_local(struct rxrpc_local *); 1004 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1005 1006 /* 1007 * misc.c 1008 */ 1009 extern unsigned int rxrpc_max_backlog __read_mostly; 1010 extern unsigned long rxrpc_requested_ack_delay; 1011 extern unsigned long rxrpc_soft_ack_delay; 1012 extern unsigned long rxrpc_idle_ack_delay; 1013 extern unsigned int rxrpc_rx_window_size; 1014 extern unsigned int rxrpc_rx_mtu; 1015 extern unsigned int rxrpc_rx_jumbo_max; 1016 extern unsigned long rxrpc_resend_timeout; 1017 1018 extern const s8 rxrpc_ack_priority[]; 1019 1020 /* 1021 * net_ns.c 1022 */ 1023 extern unsigned int rxrpc_net_id; 1024 extern struct pernet_operations rxrpc_net_ops; 1025 1026 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1027 { 1028 return net_generic(net, rxrpc_net_id); 1029 } 1030 1031 /* 1032 * output.c 1033 */ 1034 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1035 int rxrpc_send_abort_packet(struct rxrpc_call *); 1036 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1037 void rxrpc_reject_packets(struct rxrpc_local *); 1038 void rxrpc_send_keepalive(struct rxrpc_peer *); 1039 1040 /* 1041 * peer_event.c 1042 */ 1043 void rxrpc_error_report(struct sock *); 1044 void rxrpc_peer_error_distributor(struct work_struct *); 1045 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1046 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1047 void rxrpc_peer_keepalive_worker(struct work_struct *); 1048 1049 /* 1050 * peer_object.c 1051 */ 1052 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1053 const struct sockaddr_rxrpc *); 1054 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1055 struct sockaddr_rxrpc *, gfp_t); 1056 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1057 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1058 struct rxrpc_peer *); 1059 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1060 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1061 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1062 void rxrpc_put_peer(struct rxrpc_peer *); 1063 void __rxrpc_queue_peer_error(struct rxrpc_peer *); 1064 1065 /* 1066 * proc.c 1067 */ 1068 extern const struct seq_operations rxrpc_call_seq_ops; 1069 extern const struct seq_operations rxrpc_connection_seq_ops; 1070 1071 /* 1072 * recvmsg.c 1073 */ 1074 void rxrpc_notify_socket(struct rxrpc_call *); 1075 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1076 1077 /* 1078 * rxkad.c 1079 */ 1080 #ifdef CONFIG_RXKAD 1081 extern const struct rxrpc_security rxkad; 1082 #endif 1083 1084 /* 1085 * security.c 1086 */ 1087 int __init rxrpc_init_security(void); 1088 void rxrpc_exit_security(void); 1089 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1090 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1091 1092 /* 1093 * sendmsg.c 1094 */ 1095 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1096 1097 /* 1098 * skbuff.c 1099 */ 1100 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1101 void rxrpc_packet_destructor(struct sk_buff *); 1102 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1103 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1104 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1105 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1106 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1107 void rxrpc_purge_queue(struct sk_buff_head *); 1108 1109 /* 1110 * sysctl.c 1111 */ 1112 #ifdef CONFIG_SYSCTL 1113 extern int __init rxrpc_sysctl_init(void); 1114 extern void rxrpc_sysctl_exit(void); 1115 #else 1116 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1117 static inline void rxrpc_sysctl_exit(void) {} 1118 #endif 1119 1120 /* 1121 * utils.c 1122 */ 1123 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1124 struct sk_buff *); 1125 1126 static inline bool before(u32 seq1, u32 seq2) 1127 { 1128 return (s32)(seq1 - seq2) < 0; 1129 } 1130 static inline bool before_eq(u32 seq1, u32 seq2) 1131 { 1132 return (s32)(seq1 - seq2) <= 0; 1133 } 1134 static inline bool after(u32 seq1, u32 seq2) 1135 { 1136 return (s32)(seq1 - seq2) > 0; 1137 } 1138 static inline bool after_eq(u32 seq1, u32 seq2) 1139 { 1140 return (s32)(seq1 - seq2) >= 0; 1141 } 1142 1143 /* 1144 * debug tracing 1145 */ 1146 extern unsigned int rxrpc_debug; 1147 1148 #define dbgprintk(FMT,...) \ 1149 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1150 1151 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1152 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1153 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1154 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1155 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1156 1157 1158 #if defined(__KDEBUG) 1159 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1160 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1161 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1162 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1163 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1164 1165 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1166 #define RXRPC_DEBUG_KENTER 0x01 1167 #define RXRPC_DEBUG_KLEAVE 0x02 1168 #define RXRPC_DEBUG_KDEBUG 0x04 1169 #define RXRPC_DEBUG_KPROTO 0x08 1170 #define RXRPC_DEBUG_KNET 0x10 1171 1172 #define _enter(FMT,...) \ 1173 do { \ 1174 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1175 kenter(FMT,##__VA_ARGS__); \ 1176 } while (0) 1177 1178 #define _leave(FMT,...) \ 1179 do { \ 1180 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1181 kleave(FMT,##__VA_ARGS__); \ 1182 } while (0) 1183 1184 #define _debug(FMT,...) \ 1185 do { \ 1186 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1187 kdebug(FMT,##__VA_ARGS__); \ 1188 } while (0) 1189 1190 #define _proto(FMT,...) \ 1191 do { \ 1192 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1193 kproto(FMT,##__VA_ARGS__); \ 1194 } while (0) 1195 1196 #define _net(FMT,...) \ 1197 do { \ 1198 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1199 knet(FMT,##__VA_ARGS__); \ 1200 } while (0) 1201 1202 #else 1203 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1204 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1205 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1206 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1207 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1208 #endif 1209 1210 /* 1211 * debug assertion checking 1212 */ 1213 #if 1 // defined(__KDEBUGALL) 1214 1215 #define ASSERT(X) \ 1216 do { \ 1217 if (unlikely(!(X))) { \ 1218 pr_err("Assertion failed\n"); \ 1219 BUG(); \ 1220 } \ 1221 } while (0) 1222 1223 #define ASSERTCMP(X, OP, Y) \ 1224 do { \ 1225 __typeof__(X) _x = (X); \ 1226 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1227 if (unlikely(!(_x OP _y))) { \ 1228 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1229 (unsigned long)_x, (unsigned long)_x, #OP, \ 1230 (unsigned long)_y, (unsigned long)_y); \ 1231 BUG(); \ 1232 } \ 1233 } while (0) 1234 1235 #define ASSERTIF(C, X) \ 1236 do { \ 1237 if (unlikely((C) && !(X))) { \ 1238 pr_err("Assertion failed\n"); \ 1239 BUG(); \ 1240 } \ 1241 } while (0) 1242 1243 #define ASSERTIFCMP(C, X, OP, Y) \ 1244 do { \ 1245 __typeof__(X) _x = (X); \ 1246 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1247 if (unlikely((C) && !(_x OP _y))) { \ 1248 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1249 (unsigned long)_x, (unsigned long)_x, #OP, \ 1250 (unsigned long)_y, (unsigned long)_y); \ 1251 BUG(); \ 1252 } \ 1253 } while (0) 1254 1255 #else 1256 1257 #define ASSERT(X) \ 1258 do { \ 1259 } while (0) 1260 1261 #define ASSERTCMP(X, OP, Y) \ 1262 do { \ 1263 } while (0) 1264 1265 #define ASSERTIF(C, X) \ 1266 do { \ 1267 } while (0) 1268 1269 #define ASSERTIFCMP(C, X, OP, Y) \ 1270 do { \ 1271 } while (0) 1272 1273 #endif /* __KDEBUGALL */ 1274