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 79 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 80 struct list_head service_conns; /* Service conns in this namespace */ 81 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 82 struct work_struct service_conn_reaper; 83 struct timer_list service_conn_reap_timer; 84 85 unsigned int nr_client_conns; 86 unsigned int nr_active_client_conns; 87 bool kill_all_client_conns; 88 bool live; 89 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 90 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 91 struct list_head waiting_client_conns; 92 struct list_head active_client_conns; 93 struct list_head idle_client_conns; 94 struct work_struct client_conn_reaper; 95 struct timer_list client_conn_reap_timer; 96 97 struct list_head local_endpoints; 98 struct mutex local_mutex; /* Lock for ->local_endpoints */ 99 100 DECLARE_HASHTABLE (peer_hash, 10); 101 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 102 103 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 104 u8 peer_keepalive_cursor; 105 ktime_t peer_keepalive_base; 106 struct hlist_head peer_keepalive[RXRPC_KEEPALIVE_TIME + 1]; 107 struct hlist_head peer_keepalive_new; 108 struct timer_list peer_keepalive_timer; 109 struct work_struct peer_keepalive_work; 110 }; 111 112 /* 113 * Service backlog preallocation. 114 * 115 * This contains circular buffers of preallocated peers, connections and calls 116 * for incoming service calls and their head and tail pointers. This allows 117 * calls to be set up in the data_ready handler, thereby avoiding the need to 118 * shuffle packets around so much. 119 */ 120 struct rxrpc_backlog { 121 unsigned short peer_backlog_head; 122 unsigned short peer_backlog_tail; 123 unsigned short conn_backlog_head; 124 unsigned short conn_backlog_tail; 125 unsigned short call_backlog_head; 126 unsigned short call_backlog_tail; 127 #define RXRPC_BACKLOG_MAX 32 128 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 129 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 130 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 131 }; 132 133 /* 134 * RxRPC socket definition 135 */ 136 struct rxrpc_sock { 137 /* WARNING: sk has to be the first member */ 138 struct sock sk; 139 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 140 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 141 struct rxrpc_local *local; /* local endpoint */ 142 struct rxrpc_backlog *backlog; /* Preallocation for services */ 143 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 144 struct list_head sock_calls; /* List of calls owned by this socket */ 145 struct list_head to_be_accepted; /* calls awaiting acceptance */ 146 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 147 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 148 struct key *key; /* security for this socket */ 149 struct key *securities; /* list of server security descriptors */ 150 struct rb_root calls; /* User ID -> call mapping */ 151 unsigned long flags; 152 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 153 rwlock_t call_lock; /* lock for calls */ 154 u32 min_sec_level; /* minimum security level */ 155 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 156 bool exclusive; /* Exclusive connection for a client socket */ 157 u16 second_service; /* Additional service bound to the endpoint */ 158 struct { 159 /* Service upgrade information */ 160 u16 from; /* Service ID to upgrade (if not 0) */ 161 u16 to; /* service ID to upgrade to */ 162 } service_upgrade; 163 sa_family_t family; /* Protocol family created with */ 164 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 165 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 166 }; 167 168 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 169 170 /* 171 * CPU-byteorder normalised Rx packet header. 172 */ 173 struct rxrpc_host_header { 174 u32 epoch; /* client boot timestamp */ 175 u32 cid; /* connection and channel ID */ 176 u32 callNumber; /* call ID (0 for connection-level packets) */ 177 u32 seq; /* sequence number of pkt in call stream */ 178 u32 serial; /* serial number of pkt sent to network */ 179 u8 type; /* packet type */ 180 u8 flags; /* packet flags */ 181 u8 userStatus; /* app-layer defined status */ 182 u8 securityIndex; /* security protocol ID */ 183 union { 184 u16 _rsvd; /* reserved */ 185 u16 cksum; /* kerberos security checksum */ 186 }; 187 u16 serviceId; /* service ID */ 188 } __packed; 189 190 /* 191 * RxRPC socket buffer private variables 192 * - max 48 bytes (struct sk_buff::cb) 193 */ 194 struct rxrpc_skb_priv { 195 union { 196 u8 nr_jumbo; /* Number of jumbo subpackets */ 197 }; 198 union { 199 int remain; /* amount of space remaining for next write */ 200 }; 201 202 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 203 }; 204 205 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 206 207 /* 208 * RxRPC security module interface 209 */ 210 struct rxrpc_security { 211 const char *name; /* name of this service */ 212 u8 security_index; /* security type provided */ 213 214 /* Initialise a security service */ 215 int (*init)(void); 216 217 /* Clean up a security service */ 218 void (*exit)(void); 219 220 /* initialise a connection's security */ 221 int (*init_connection_security)(struct rxrpc_connection *); 222 223 /* prime a connection's packet security */ 224 int (*prime_packet_security)(struct rxrpc_connection *); 225 226 /* impose security on a packet */ 227 int (*secure_packet)(struct rxrpc_call *, 228 struct sk_buff *, 229 size_t, 230 void *); 231 232 /* verify the security on a received packet */ 233 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 234 unsigned int, unsigned int, rxrpc_seq_t, u16); 235 236 /* Locate the data in a received packet that has been verified. */ 237 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 238 unsigned int *, unsigned int *); 239 240 /* issue a challenge */ 241 int (*issue_challenge)(struct rxrpc_connection *); 242 243 /* respond to a challenge */ 244 int (*respond_to_challenge)(struct rxrpc_connection *, 245 struct sk_buff *, 246 u32 *); 247 248 /* verify a response */ 249 int (*verify_response)(struct rxrpc_connection *, 250 struct sk_buff *, 251 u32 *); 252 253 /* clear connection security */ 254 void (*clear)(struct rxrpc_connection *); 255 }; 256 257 /* 258 * RxRPC local transport endpoint description 259 * - owned by a single AF_RXRPC socket 260 * - pointed to by transport socket struct sk_user_data 261 */ 262 struct rxrpc_local { 263 struct rcu_head rcu; 264 atomic_t usage; 265 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 266 struct list_head link; 267 struct socket *socket; /* my UDP socket */ 268 struct work_struct processor; 269 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 270 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 271 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 272 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 273 struct rb_root client_conns; /* Client connections by socket params */ 274 spinlock_t client_conns_lock; /* Lock for client_conns */ 275 spinlock_t lock; /* access lock */ 276 rwlock_t services_lock; /* lock for services list */ 277 int debug_id; /* debug ID for printks */ 278 bool dead; 279 bool service_closed; /* Service socket closed */ 280 struct sockaddr_rxrpc srx; /* local address */ 281 }; 282 283 /* 284 * RxRPC remote transport endpoint definition 285 * - matched by local endpoint, remote port, address and protocol type 286 */ 287 struct rxrpc_peer { 288 struct rcu_head rcu; /* This must be first */ 289 atomic_t usage; 290 unsigned long hash_key; 291 struct hlist_node hash_link; 292 struct rxrpc_local *local; 293 struct hlist_head error_targets; /* targets for net error distribution */ 294 struct work_struct error_distributor; 295 struct rb_root service_conns; /* Service connections */ 296 struct hlist_node keepalive_link; /* Link in net->peer_keepalive[] */ 297 time64_t last_tx_at; /* Last time packet sent here */ 298 seqlock_t service_conn_lock; 299 spinlock_t lock; /* access lock */ 300 unsigned int if_mtu; /* interface MTU for this peer */ 301 unsigned int mtu; /* network MTU for this peer */ 302 unsigned int maxdata; /* data size (MTU - hdrsize) */ 303 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 304 int debug_id; /* debug ID for printks */ 305 int error_report; /* Net (+0) or local (+1000000) to distribute */ 306 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 307 struct sockaddr_rxrpc srx; /* remote address */ 308 309 /* calculated RTT cache */ 310 #define RXRPC_RTT_CACHE_SIZE 32 311 ktime_t rtt_last_req; /* Time of last RTT request */ 312 u64 rtt; /* Current RTT estimate (in nS) */ 313 u64 rtt_sum; /* Sum of cache contents */ 314 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 315 u8 rtt_cursor; /* next entry at which to insert */ 316 u8 rtt_usage; /* amount of cache actually used */ 317 318 u8 cong_cwnd; /* Congestion window size */ 319 }; 320 321 /* 322 * Keys for matching a connection. 323 */ 324 struct rxrpc_conn_proto { 325 union { 326 struct { 327 u32 epoch; /* epoch of this connection */ 328 u32 cid; /* connection ID */ 329 }; 330 u64 index_key; 331 }; 332 }; 333 334 struct rxrpc_conn_parameters { 335 struct rxrpc_local *local; /* Representation of local endpoint */ 336 struct rxrpc_peer *peer; /* Remote endpoint */ 337 struct key *key; /* Security details */ 338 bool exclusive; /* T if conn is exclusive */ 339 bool upgrade; /* T if service ID can be upgraded */ 340 u16 service_id; /* Service ID for this connection */ 341 u32 security_level; /* Security level selected */ 342 }; 343 344 /* 345 * Bits in the connection flags. 346 */ 347 enum rxrpc_conn_flag { 348 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 349 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 350 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 351 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 352 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 353 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 354 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 355 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 356 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 357 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 358 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 359 }; 360 361 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 362 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 363 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 364 (1UL << RXRPC_CONN_FINAL_ACK_3)) 365 366 /* 367 * Events that can be raised upon a connection. 368 */ 369 enum rxrpc_conn_event { 370 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 371 }; 372 373 /* 374 * The connection cache state. 375 */ 376 enum rxrpc_conn_cache_state { 377 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 378 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 379 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 380 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 381 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 382 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 383 RXRPC_CONN__NR_CACHE_STATES 384 }; 385 386 /* 387 * The connection protocol state. 388 */ 389 enum rxrpc_conn_proto_state { 390 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 391 RXRPC_CONN_CLIENT, /* Client connection */ 392 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 393 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 394 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 395 RXRPC_CONN_SERVICE, /* Service secured connection */ 396 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 397 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 398 RXRPC_CONN__NR_STATES 399 }; 400 401 /* 402 * RxRPC connection definition 403 * - matched by { local, peer, epoch, conn_id, direction } 404 * - each connection can only handle four simultaneous calls 405 */ 406 struct rxrpc_connection { 407 struct rxrpc_conn_proto proto; 408 struct rxrpc_conn_parameters params; 409 410 atomic_t usage; 411 struct rcu_head rcu; 412 struct list_head cache_link; 413 414 spinlock_t channel_lock; 415 unsigned char active_chans; /* Mask of active channels */ 416 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 417 struct list_head waiting_calls; /* Calls waiting for channels */ 418 struct rxrpc_channel { 419 unsigned long final_ack_at; /* Time at which to issue final ACK */ 420 struct rxrpc_call __rcu *call; /* Active call */ 421 u32 call_id; /* ID of current call */ 422 u32 call_counter; /* Call ID counter */ 423 u32 last_call; /* ID of last call */ 424 u8 last_type; /* Type of last packet */ 425 union { 426 u32 last_seq; 427 u32 last_abort; 428 }; 429 } channels[RXRPC_MAXCALLS]; 430 431 struct timer_list timer; /* Conn event timer */ 432 struct work_struct processor; /* connection event processor */ 433 union { 434 struct rb_node client_node; /* Node in local->client_conns */ 435 struct rb_node service_node; /* Node in peer->service_conns */ 436 }; 437 struct list_head proc_link; /* link in procfs list */ 438 struct list_head link; /* link in master connection list */ 439 struct sk_buff_head rx_queue; /* received conn-level packets */ 440 const struct rxrpc_security *security; /* applied security module */ 441 struct key *server_key; /* security for this service */ 442 struct crypto_skcipher *cipher; /* encryption handle */ 443 struct rxrpc_crypt csum_iv; /* packet checksum base */ 444 unsigned long flags; 445 unsigned long events; 446 unsigned long idle_timestamp; /* Time at which last became idle */ 447 spinlock_t state_lock; /* state-change lock */ 448 enum rxrpc_conn_cache_state cache_state; 449 enum rxrpc_conn_proto_state state; /* current state of connection */ 450 u32 local_abort; /* local abort code */ 451 u32 remote_abort; /* remote abort code */ 452 int debug_id; /* debug ID for printks */ 453 atomic_t serial; /* packet serial number counter */ 454 unsigned int hi_serial; /* highest serial number received */ 455 u32 security_nonce; /* response re-use preventer */ 456 u16 service_id; /* Service ID, possibly upgraded */ 457 u8 size_align; /* data size alignment (for security) */ 458 u8 security_size; /* security header size */ 459 u8 security_ix; /* security type */ 460 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 461 }; 462 463 /* 464 * Flags in call->flags. 465 */ 466 enum rxrpc_call_flag { 467 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 468 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 469 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 470 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 471 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 472 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 473 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 474 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 475 RXRPC_CALL_PINGING, /* Ping in process */ 476 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 477 }; 478 479 /* 480 * Events that can be raised on a call. 481 */ 482 enum rxrpc_call_event { 483 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 484 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 485 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 486 RXRPC_CALL_EV_PING, /* Ping send required */ 487 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 488 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 489 }; 490 491 /* 492 * The states that a call can be in. 493 */ 494 enum rxrpc_call_state { 495 RXRPC_CALL_UNINITIALISED, 496 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 497 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 498 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 499 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 500 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 501 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 502 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 503 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 504 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 505 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 506 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 507 RXRPC_CALL_COMPLETE, /* - call complete */ 508 NR__RXRPC_CALL_STATES 509 }; 510 511 /* 512 * Call Tx congestion management modes. 513 */ 514 enum rxrpc_congest_mode { 515 RXRPC_CALL_SLOW_START, 516 RXRPC_CALL_CONGEST_AVOIDANCE, 517 RXRPC_CALL_PACKET_LOSS, 518 RXRPC_CALL_FAST_RETRANSMIT, 519 NR__RXRPC_CONGEST_MODES 520 }; 521 522 /* 523 * RxRPC call definition 524 * - matched by { connection, call_id } 525 */ 526 struct rxrpc_call { 527 struct rcu_head rcu; 528 struct rxrpc_connection *conn; /* connection carrying call */ 529 struct rxrpc_peer *peer; /* Peer record for remote address */ 530 struct rxrpc_sock __rcu *socket; /* socket responsible */ 531 struct mutex user_mutex; /* User access mutex */ 532 unsigned long ack_at; /* When deferred ACK needs to happen */ 533 unsigned long ack_lost_at; /* When ACK is figured as lost */ 534 unsigned long resend_at; /* When next resend needs to happen */ 535 unsigned long ping_at; /* When next to send a ping */ 536 unsigned long keepalive_at; /* When next to send a keepalive ping */ 537 unsigned long expect_rx_by; /* When we expect to get a packet by */ 538 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 539 unsigned long expect_term_by; /* When we expect call termination by */ 540 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 541 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 542 struct timer_list timer; /* Combined event timer */ 543 struct work_struct processor; /* Event processor */ 544 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 545 struct list_head link; /* link in master call list */ 546 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 547 struct hlist_node error_link; /* link in error distribution list */ 548 struct list_head accept_link; /* Link in rx->acceptq */ 549 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 550 struct list_head sock_link; /* Link in rx->sock_calls */ 551 struct rb_node sock_node; /* Node in rx->calls */ 552 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 553 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 554 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 555 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 556 unsigned long user_call_ID; /* user-defined call ID */ 557 unsigned long flags; 558 unsigned long events; 559 spinlock_t lock; 560 spinlock_t notify_lock; /* Kernel notification lock */ 561 rwlock_t state_lock; /* lock for state transition */ 562 u32 abort_code; /* Local/remote abort code */ 563 int error; /* Local error incurred */ 564 enum rxrpc_call_state state; /* current state of call */ 565 enum rxrpc_call_completion completion; /* Call completion condition */ 566 atomic_t usage; 567 u16 service_id; /* service ID */ 568 u8 security_ix; /* Security type */ 569 u32 call_id; /* call ID on connection */ 570 u32 cid; /* connection ID plus channel index */ 571 int debug_id; /* debug ID for printks */ 572 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 573 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 574 575 /* Rx/Tx circular buffer, depending on phase. 576 * 577 * In the Rx phase, packets are annotated with 0 or the number of the 578 * segment of a jumbo packet each buffer refers to. There can be up to 579 * 47 segments in a maximum-size UDP packet. 580 * 581 * In the Tx phase, packets are annotated with which buffers have been 582 * acked. 583 */ 584 #define RXRPC_RXTX_BUFF_SIZE 64 585 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 586 #define RXRPC_INIT_RX_WINDOW_SIZE 32 587 struct sk_buff **rxtx_buffer; 588 u8 *rxtx_annotations; 589 #define RXRPC_TX_ANNO_ACK 0 590 #define RXRPC_TX_ANNO_UNACK 1 591 #define RXRPC_TX_ANNO_NAK 2 592 #define RXRPC_TX_ANNO_RETRANS 3 593 #define RXRPC_TX_ANNO_MASK 0x03 594 #define RXRPC_TX_ANNO_LAST 0x04 595 #define RXRPC_TX_ANNO_RESENT 0x08 596 597 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 598 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 599 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 600 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 601 * not hard-ACK'd packet follows this. 602 */ 603 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 604 605 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 606 * is fixed, we keep these numbers in terms of segments (ie. DATA 607 * packets) rather than bytes. 608 */ 609 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 610 u8 cong_cwnd; /* Congestion window size */ 611 u8 cong_extra; /* Extra to send for congestion management */ 612 u8 cong_ssthresh; /* Slow-start threshold */ 613 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 614 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 615 u8 cong_cumul_acks; /* Cumulative ACK count */ 616 ktime_t cong_tstamp; /* Last time cwnd was changed */ 617 618 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 619 * consumed packet follows this. 620 */ 621 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 622 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 623 u8 rx_winsize; /* Size of Rx window */ 624 u8 tx_winsize; /* Maximum size of Tx window */ 625 bool tx_phase; /* T if transmission phase, F if receive phase */ 626 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 627 628 /* receive-phase ACK management */ 629 u8 ackr_reason; /* reason to ACK */ 630 u16 ackr_skew; /* skew on packet being ACK'd */ 631 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 632 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 633 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 634 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 635 636 /* ping management */ 637 rxrpc_serial_t ping_serial; /* Last ping sent */ 638 ktime_t ping_time; /* Time last ping sent */ 639 640 /* transmission-phase ACK management */ 641 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 642 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 643 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 644 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 645 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 646 }; 647 648 /* 649 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 650 */ 651 struct rxrpc_ack_summary { 652 u8 ack_reason; 653 u8 nr_acks; /* Number of ACKs in packet */ 654 u8 nr_nacks; /* Number of NACKs in packet */ 655 u8 nr_new_acks; /* Number of new ACKs in packet */ 656 u8 nr_new_nacks; /* Number of new NACKs in packet */ 657 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 658 bool new_low_nack; /* T if new low NACK found */ 659 bool retrans_timeo; /* T if reTx due to timeout happened */ 660 u8 flight_size; /* Number of unreceived transmissions */ 661 /* Place to stash values for tracing */ 662 enum rxrpc_congest_mode mode:8; 663 u8 cwnd; 664 u8 ssthresh; 665 u8 dup_acks; 666 u8 cumulative_acks; 667 }; 668 669 /* 670 * sendmsg() cmsg-specified parameters. 671 */ 672 enum rxrpc_command { 673 RXRPC_CMD_SEND_DATA, /* send data message */ 674 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 675 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 676 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 677 }; 678 679 struct rxrpc_call_params { 680 s64 tx_total_len; /* Total Tx data length (if send data) */ 681 unsigned long user_call_ID; /* User's call ID */ 682 struct { 683 u32 hard; /* Maximum lifetime (sec) */ 684 u32 idle; /* Max time since last data packet (msec) */ 685 u32 normal; /* Max time since last call packet (msec) */ 686 } timeouts; 687 u8 nr_timeouts; /* Number of timeouts specified */ 688 }; 689 690 struct rxrpc_send_params { 691 struct rxrpc_call_params call; 692 u32 abort_code; /* Abort code to Tx (if abort) */ 693 enum rxrpc_command command : 8; /* The command to implement */ 694 bool exclusive; /* Shared or exclusive call */ 695 bool upgrade; /* If the connection is upgradeable */ 696 }; 697 698 #include <trace/events/rxrpc.h> 699 700 /* 701 * af_rxrpc.c 702 */ 703 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 704 extern struct workqueue_struct *rxrpc_workqueue; 705 706 /* 707 * call_accept.c 708 */ 709 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 710 void rxrpc_discard_prealloc(struct rxrpc_sock *); 711 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 712 struct rxrpc_connection *, 713 struct sk_buff *); 714 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 715 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 716 rxrpc_notify_rx_t); 717 int rxrpc_reject_call(struct rxrpc_sock *); 718 719 /* 720 * call_event.c 721 */ 722 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 723 enum rxrpc_propose_ack_trace); 724 void rxrpc_process_call(struct work_struct *); 725 726 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 727 unsigned long expire_at, 728 unsigned long now, 729 enum rxrpc_timer_trace why) 730 { 731 trace_rxrpc_timer(call, why, now); 732 timer_reduce(&call->timer, expire_at); 733 } 734 735 /* 736 * call_object.c 737 */ 738 extern const char *const rxrpc_call_states[]; 739 extern const char *const rxrpc_call_completions[]; 740 extern unsigned int rxrpc_max_call_lifetime; 741 extern struct kmem_cache *rxrpc_call_jar; 742 743 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 744 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 745 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 746 struct rxrpc_conn_parameters *, 747 struct sockaddr_rxrpc *, 748 struct rxrpc_call_params *, gfp_t, 749 unsigned int); 750 int rxrpc_retry_client_call(struct rxrpc_sock *, 751 struct rxrpc_call *, 752 struct rxrpc_conn_parameters *, 753 struct sockaddr_rxrpc *, 754 gfp_t); 755 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 756 struct sk_buff *); 757 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 758 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 759 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 760 bool __rxrpc_queue_call(struct rxrpc_call *); 761 bool rxrpc_queue_call(struct rxrpc_call *); 762 void rxrpc_see_call(struct rxrpc_call *); 763 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 764 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 765 void rxrpc_cleanup_call(struct rxrpc_call *); 766 void rxrpc_destroy_all_calls(struct rxrpc_net *); 767 768 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 769 { 770 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 771 } 772 773 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 774 { 775 return !rxrpc_is_service_call(call); 776 } 777 778 /* 779 * Transition a call to the complete state. 780 */ 781 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 782 enum rxrpc_call_completion compl, 783 u32 abort_code, 784 int error) 785 { 786 if (call->state < RXRPC_CALL_COMPLETE) { 787 call->abort_code = abort_code; 788 call->error = error; 789 call->completion = compl, 790 call->state = RXRPC_CALL_COMPLETE; 791 trace_rxrpc_call_complete(call); 792 wake_up(&call->waitq); 793 return true; 794 } 795 return false; 796 } 797 798 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 799 enum rxrpc_call_completion compl, 800 u32 abort_code, 801 int error) 802 { 803 bool ret; 804 805 write_lock_bh(&call->state_lock); 806 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 807 write_unlock_bh(&call->state_lock); 808 return ret; 809 } 810 811 /* 812 * Record that a call successfully completed. 813 */ 814 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 815 { 816 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 817 } 818 819 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 820 { 821 bool ret; 822 823 write_lock_bh(&call->state_lock); 824 ret = __rxrpc_call_completed(call); 825 write_unlock_bh(&call->state_lock); 826 return ret; 827 } 828 829 /* 830 * Record that a call is locally aborted. 831 */ 832 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 833 rxrpc_seq_t seq, 834 u32 abort_code, int error) 835 { 836 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 837 abort_code, error); 838 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 839 abort_code, error); 840 } 841 842 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 843 rxrpc_seq_t seq, u32 abort_code, int error) 844 { 845 bool ret; 846 847 write_lock_bh(&call->state_lock); 848 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 849 write_unlock_bh(&call->state_lock); 850 return ret; 851 } 852 853 /* 854 * Abort a call due to a protocol error. 855 */ 856 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 857 struct sk_buff *skb, 858 const char *eproto_why, 859 const char *why, 860 u32 abort_code) 861 { 862 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 863 864 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 865 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 866 } 867 868 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 869 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 870 (abort_why), (abort_code)) 871 872 /* 873 * conn_client.c 874 */ 875 extern unsigned int rxrpc_max_client_connections; 876 extern unsigned int rxrpc_reap_client_connections; 877 extern unsigned long rxrpc_conn_idle_client_expiry; 878 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 879 extern struct idr rxrpc_client_conn_ids; 880 881 void rxrpc_destroy_client_conn_ids(void); 882 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 883 struct sockaddr_rxrpc *, gfp_t); 884 void rxrpc_expose_client_call(struct rxrpc_call *); 885 void rxrpc_disconnect_client_call(struct rxrpc_call *); 886 void rxrpc_put_client_conn(struct rxrpc_connection *); 887 void rxrpc_discard_expired_client_conns(struct work_struct *); 888 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 889 890 /* 891 * conn_event.c 892 */ 893 void rxrpc_process_connection(struct work_struct *); 894 895 /* 896 * conn_object.c 897 */ 898 extern unsigned int rxrpc_connection_expiry; 899 extern unsigned int rxrpc_closed_conn_expiry; 900 901 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 902 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 903 struct sk_buff *); 904 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 905 void rxrpc_disconnect_call(struct rxrpc_call *); 906 void rxrpc_kill_connection(struct rxrpc_connection *); 907 bool rxrpc_queue_conn(struct rxrpc_connection *); 908 void rxrpc_see_connection(struct rxrpc_connection *); 909 void rxrpc_get_connection(struct rxrpc_connection *); 910 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 911 void rxrpc_put_service_conn(struct rxrpc_connection *); 912 void rxrpc_service_connection_reaper(struct work_struct *); 913 void rxrpc_destroy_all_connections(struct rxrpc_net *); 914 915 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 916 { 917 return conn->out_clientflag; 918 } 919 920 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 921 { 922 return !rxrpc_conn_is_client(conn); 923 } 924 925 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 926 { 927 if (!conn) 928 return; 929 930 if (rxrpc_conn_is_client(conn)) 931 rxrpc_put_client_conn(conn); 932 else 933 rxrpc_put_service_conn(conn); 934 } 935 936 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 937 unsigned long expire_at) 938 { 939 timer_reduce(&conn->timer, expire_at); 940 } 941 942 /* 943 * conn_service.c 944 */ 945 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 946 struct sk_buff *); 947 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 948 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 949 struct rxrpc_connection *, struct sk_buff *); 950 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 951 952 /* 953 * input.c 954 */ 955 void rxrpc_data_ready(struct sock *); 956 957 /* 958 * insecure.c 959 */ 960 extern const struct rxrpc_security rxrpc_no_security; 961 962 /* 963 * key.c 964 */ 965 extern struct key_type key_type_rxrpc; 966 extern struct key_type key_type_rxrpc_s; 967 968 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 969 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 970 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 971 u32); 972 973 /* 974 * local_event.c 975 */ 976 extern void rxrpc_process_local_events(struct rxrpc_local *); 977 978 /* 979 * local_object.c 980 */ 981 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 982 void __rxrpc_put_local(struct rxrpc_local *); 983 void rxrpc_destroy_all_locals(struct rxrpc_net *); 984 985 static inline void rxrpc_get_local(struct rxrpc_local *local) 986 { 987 atomic_inc(&local->usage); 988 } 989 990 static inline 991 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 992 { 993 return atomic_inc_not_zero(&local->usage) ? local : NULL; 994 } 995 996 static inline void rxrpc_put_local(struct rxrpc_local *local) 997 { 998 if (local && atomic_dec_and_test(&local->usage)) 999 __rxrpc_put_local(local); 1000 } 1001 1002 static inline void rxrpc_queue_local(struct rxrpc_local *local) 1003 { 1004 rxrpc_queue_work(&local->processor); 1005 } 1006 1007 /* 1008 * misc.c 1009 */ 1010 extern unsigned int rxrpc_max_backlog __read_mostly; 1011 extern unsigned long rxrpc_requested_ack_delay; 1012 extern unsigned long rxrpc_soft_ack_delay; 1013 extern unsigned long rxrpc_idle_ack_delay; 1014 extern unsigned int rxrpc_rx_window_size; 1015 extern unsigned int rxrpc_rx_mtu; 1016 extern unsigned int rxrpc_rx_jumbo_max; 1017 extern unsigned long rxrpc_resend_timeout; 1018 1019 extern const s8 rxrpc_ack_priority[]; 1020 1021 /* 1022 * net_ns.c 1023 */ 1024 extern unsigned int rxrpc_net_id; 1025 extern struct pernet_operations rxrpc_net_ops; 1026 1027 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1028 { 1029 return net_generic(net, rxrpc_net_id); 1030 } 1031 1032 /* 1033 * output.c 1034 */ 1035 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1036 int rxrpc_send_abort_packet(struct rxrpc_call *); 1037 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1038 void rxrpc_reject_packets(struct rxrpc_local *); 1039 void rxrpc_send_keepalive(struct rxrpc_peer *); 1040 1041 /* 1042 * peer_event.c 1043 */ 1044 void rxrpc_error_report(struct sock *); 1045 void rxrpc_peer_error_distributor(struct work_struct *); 1046 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1047 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1048 void rxrpc_peer_keepalive_worker(struct work_struct *); 1049 1050 /* 1051 * peer_object.c 1052 */ 1053 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1054 const struct sockaddr_rxrpc *); 1055 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1056 struct sockaddr_rxrpc *, gfp_t); 1057 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1058 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1059 struct rxrpc_peer *); 1060 1061 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) 1062 { 1063 atomic_inc(&peer->usage); 1064 return peer; 1065 } 1066 1067 static inline 1068 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 1069 { 1070 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 1071 } 1072 1073 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 1074 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 1075 { 1076 if (peer && atomic_dec_and_test(&peer->usage)) 1077 __rxrpc_put_peer(peer); 1078 } 1079 1080 /* 1081 * proc.c 1082 */ 1083 extern const struct file_operations rxrpc_call_seq_fops; 1084 extern const struct file_operations rxrpc_connection_seq_fops; 1085 1086 /* 1087 * recvmsg.c 1088 */ 1089 void rxrpc_notify_socket(struct rxrpc_call *); 1090 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1091 1092 /* 1093 * rxkad.c 1094 */ 1095 #ifdef CONFIG_RXKAD 1096 extern const struct rxrpc_security rxkad; 1097 #endif 1098 1099 /* 1100 * security.c 1101 */ 1102 int __init rxrpc_init_security(void); 1103 void rxrpc_exit_security(void); 1104 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1105 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1106 1107 /* 1108 * sendmsg.c 1109 */ 1110 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1111 1112 /* 1113 * skbuff.c 1114 */ 1115 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1116 void rxrpc_packet_destructor(struct sk_buff *); 1117 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1118 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1119 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1120 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1121 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1122 void rxrpc_purge_queue(struct sk_buff_head *); 1123 1124 /* 1125 * sysctl.c 1126 */ 1127 #ifdef CONFIG_SYSCTL 1128 extern int __init rxrpc_sysctl_init(void); 1129 extern void rxrpc_sysctl_exit(void); 1130 #else 1131 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1132 static inline void rxrpc_sysctl_exit(void) {} 1133 #endif 1134 1135 /* 1136 * utils.c 1137 */ 1138 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1139 struct sk_buff *); 1140 1141 static inline bool before(u32 seq1, u32 seq2) 1142 { 1143 return (s32)(seq1 - seq2) < 0; 1144 } 1145 static inline bool before_eq(u32 seq1, u32 seq2) 1146 { 1147 return (s32)(seq1 - seq2) <= 0; 1148 } 1149 static inline bool after(u32 seq1, u32 seq2) 1150 { 1151 return (s32)(seq1 - seq2) > 0; 1152 } 1153 static inline bool after_eq(u32 seq1, u32 seq2) 1154 { 1155 return (s32)(seq1 - seq2) >= 0; 1156 } 1157 1158 /* 1159 * debug tracing 1160 */ 1161 extern unsigned int rxrpc_debug; 1162 1163 #define dbgprintk(FMT,...) \ 1164 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1165 1166 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1167 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1168 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1169 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1170 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1171 1172 1173 #if defined(__KDEBUG) 1174 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1175 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1176 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1177 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1178 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1179 1180 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1181 #define RXRPC_DEBUG_KENTER 0x01 1182 #define RXRPC_DEBUG_KLEAVE 0x02 1183 #define RXRPC_DEBUG_KDEBUG 0x04 1184 #define RXRPC_DEBUG_KPROTO 0x08 1185 #define RXRPC_DEBUG_KNET 0x10 1186 1187 #define _enter(FMT,...) \ 1188 do { \ 1189 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1190 kenter(FMT,##__VA_ARGS__); \ 1191 } while (0) 1192 1193 #define _leave(FMT,...) \ 1194 do { \ 1195 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1196 kleave(FMT,##__VA_ARGS__); \ 1197 } while (0) 1198 1199 #define _debug(FMT,...) \ 1200 do { \ 1201 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1202 kdebug(FMT,##__VA_ARGS__); \ 1203 } while (0) 1204 1205 #define _proto(FMT,...) \ 1206 do { \ 1207 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1208 kproto(FMT,##__VA_ARGS__); \ 1209 } while (0) 1210 1211 #define _net(FMT,...) \ 1212 do { \ 1213 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1214 knet(FMT,##__VA_ARGS__); \ 1215 } while (0) 1216 1217 #else 1218 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1219 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1220 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1221 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1222 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1223 #endif 1224 1225 /* 1226 * debug assertion checking 1227 */ 1228 #if 1 // defined(__KDEBUGALL) 1229 1230 #define ASSERT(X) \ 1231 do { \ 1232 if (unlikely(!(X))) { \ 1233 pr_err("Assertion failed\n"); \ 1234 BUG(); \ 1235 } \ 1236 } while (0) 1237 1238 #define ASSERTCMP(X, OP, Y) \ 1239 do { \ 1240 __typeof__(X) _x = (X); \ 1241 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1242 if (unlikely(!(_x OP _y))) { \ 1243 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1244 (unsigned long)_x, (unsigned long)_x, #OP, \ 1245 (unsigned long)_y, (unsigned long)_y); \ 1246 BUG(); \ 1247 } \ 1248 } while (0) 1249 1250 #define ASSERTIF(C, X) \ 1251 do { \ 1252 if (unlikely((C) && !(X))) { \ 1253 pr_err("Assertion failed\n"); \ 1254 BUG(); \ 1255 } \ 1256 } while (0) 1257 1258 #define ASSERTIFCMP(C, X, OP, Y) \ 1259 do { \ 1260 __typeof__(X) _x = (X); \ 1261 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1262 if (unlikely((C) && !(_x OP _y))) { \ 1263 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1264 (unsigned long)_x, (unsigned long)_x, #OP, \ 1265 (unsigned long)_y, (unsigned long)_y); \ 1266 BUG(); \ 1267 } \ 1268 } while (0) 1269 1270 #else 1271 1272 #define ASSERT(X) \ 1273 do { \ 1274 } while (0) 1275 1276 #define ASSERTCMP(X, OP, Y) \ 1277 do { \ 1278 } while (0) 1279 1280 #define ASSERTIF(C, X) \ 1281 do { \ 1282 } while (0) 1283 1284 #define ASSERTIFCMP(C, X, OP, Y) \ 1285 do { \ 1286 } while (0) 1287 1288 #endif /* __KDEBUGALL */ 1289