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/sock.h> 15 #include <net/af_rxrpc.h> 16 #include <rxrpc/packet.h> 17 18 #if 0 19 #define CHECK_SLAB_OKAY(X) \ 20 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 21 (POISON_FREE << 8 | POISON_FREE)) 22 #else 23 #define CHECK_SLAB_OKAY(X) do {} while (0) 24 #endif 25 26 #define FCRYPT_BSIZE 8 27 struct rxrpc_crypt { 28 union { 29 u8 x[FCRYPT_BSIZE]; 30 __be32 n[2]; 31 }; 32 } __attribute__((aligned(8))); 33 34 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 35 #define rxrpc_queue_delayed_work(WS,D) \ 36 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 37 38 struct rxrpc_connection; 39 40 /* 41 * Mark applied to socket buffers. 42 */ 43 enum rxrpc_skb_mark { 44 RXRPC_SKB_MARK_DATA, /* data message */ 45 RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ 46 RXRPC_SKB_MARK_BUSY, /* server busy message */ 47 RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ 48 RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ 49 RXRPC_SKB_MARK_NET_ERROR, /* network error message */ 50 RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ 51 RXRPC_SKB_MARK_NEW_CALL, /* local error message */ 52 }; 53 54 /* 55 * sk_state for RxRPC sockets 56 */ 57 enum { 58 RXRPC_UNBOUND = 0, 59 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 60 RXRPC_CLIENT_BOUND, /* client local address bound */ 61 RXRPC_SERVER_BOUND, /* server local address bound */ 62 RXRPC_SERVER_LISTENING, /* server listening for connections */ 63 RXRPC_CLOSE, /* socket is being closed */ 64 }; 65 66 /* 67 * Service backlog preallocation. 68 * 69 * This contains circular buffers of preallocated peers, connections and calls 70 * for incoming service calls and their head and tail pointers. This allows 71 * calls to be set up in the data_ready handler, thereby avoiding the need to 72 * shuffle packets around so much. 73 */ 74 struct rxrpc_backlog { 75 unsigned short peer_backlog_head; 76 unsigned short peer_backlog_tail; 77 unsigned short conn_backlog_head; 78 unsigned short conn_backlog_tail; 79 unsigned short call_backlog_head; 80 unsigned short call_backlog_tail; 81 #define RXRPC_BACKLOG_MAX 32 82 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 83 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 84 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 85 }; 86 87 /* 88 * RxRPC socket definition 89 */ 90 struct rxrpc_sock { 91 /* WARNING: sk has to be the first member */ 92 struct sock sk; 93 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 94 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 95 struct rxrpc_local *local; /* local endpoint */ 96 struct rxrpc_backlog *backlog; /* Preallocation for services */ 97 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 98 struct list_head sock_calls; /* List of calls owned by this socket */ 99 struct list_head to_be_accepted; /* calls awaiting acceptance */ 100 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 101 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 102 struct key *key; /* security for this socket */ 103 struct key *securities; /* list of server security descriptors */ 104 struct rb_root calls; /* User ID -> call mapping */ 105 unsigned long flags; 106 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 107 rwlock_t call_lock; /* lock for calls */ 108 u32 min_sec_level; /* minimum security level */ 109 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 110 bool exclusive; /* Exclusive connection for a client socket */ 111 sa_family_t family; /* Protocol family created with */ 112 struct sockaddr_rxrpc srx; /* local address */ 113 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 114 }; 115 116 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 117 118 /* 119 * CPU-byteorder normalised Rx packet header. 120 */ 121 struct rxrpc_host_header { 122 u32 epoch; /* client boot timestamp */ 123 u32 cid; /* connection and channel ID */ 124 u32 callNumber; /* call ID (0 for connection-level packets) */ 125 u32 seq; /* sequence number of pkt in call stream */ 126 u32 serial; /* serial number of pkt sent to network */ 127 u8 type; /* packet type */ 128 u8 flags; /* packet flags */ 129 u8 userStatus; /* app-layer defined status */ 130 u8 securityIndex; /* security protocol ID */ 131 union { 132 u16 _rsvd; /* reserved */ 133 u16 cksum; /* kerberos security checksum */ 134 }; 135 u16 serviceId; /* service ID */ 136 } __packed; 137 138 /* 139 * RxRPC socket buffer private variables 140 * - max 48 bytes (struct sk_buff::cb) 141 */ 142 struct rxrpc_skb_priv { 143 union { 144 u8 nr_jumbo; /* Number of jumbo subpackets */ 145 }; 146 union { 147 unsigned int offset; /* offset into buffer of next read */ 148 int remain; /* amount of space remaining for next write */ 149 u32 error; /* network error code */ 150 }; 151 152 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 153 }; 154 155 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 156 157 /* 158 * RxRPC security module interface 159 */ 160 struct rxrpc_security { 161 const char *name; /* name of this service */ 162 u8 security_index; /* security type provided */ 163 164 /* Initialise a security service */ 165 int (*init)(void); 166 167 /* Clean up a security service */ 168 void (*exit)(void); 169 170 /* initialise a connection's security */ 171 int (*init_connection_security)(struct rxrpc_connection *); 172 173 /* prime a connection's packet security */ 174 int (*prime_packet_security)(struct rxrpc_connection *); 175 176 /* impose security on a packet */ 177 int (*secure_packet)(struct rxrpc_call *, 178 struct sk_buff *, 179 size_t, 180 void *); 181 182 /* verify the security on a received packet */ 183 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 184 unsigned int, unsigned int, rxrpc_seq_t, u16); 185 186 /* Locate the data in a received packet that has been verified. */ 187 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 188 unsigned int *, unsigned int *); 189 190 /* issue a challenge */ 191 int (*issue_challenge)(struct rxrpc_connection *); 192 193 /* respond to a challenge */ 194 int (*respond_to_challenge)(struct rxrpc_connection *, 195 struct sk_buff *, 196 u32 *); 197 198 /* verify a response */ 199 int (*verify_response)(struct rxrpc_connection *, 200 struct sk_buff *, 201 u32 *); 202 203 /* clear connection security */ 204 void (*clear)(struct rxrpc_connection *); 205 }; 206 207 /* 208 * RxRPC local transport endpoint description 209 * - owned by a single AF_RXRPC socket 210 * - pointed to by transport socket struct sk_user_data 211 */ 212 struct rxrpc_local { 213 struct rcu_head rcu; 214 atomic_t usage; 215 struct list_head link; 216 struct socket *socket; /* my UDP socket */ 217 struct work_struct processor; 218 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 219 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 220 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 221 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 222 struct rb_root client_conns; /* Client connections by socket params */ 223 spinlock_t client_conns_lock; /* Lock for client_conns */ 224 spinlock_t lock; /* access lock */ 225 rwlock_t services_lock; /* lock for services list */ 226 int debug_id; /* debug ID for printks */ 227 bool dead; 228 struct sockaddr_rxrpc srx; /* local address */ 229 }; 230 231 /* 232 * RxRPC remote transport endpoint definition 233 * - matched by local endpoint, remote port, address and protocol type 234 */ 235 struct rxrpc_peer { 236 struct rcu_head rcu; /* This must be first */ 237 atomic_t usage; 238 unsigned long hash_key; 239 struct hlist_node hash_link; 240 struct rxrpc_local *local; 241 struct hlist_head error_targets; /* targets for net error distribution */ 242 struct work_struct error_distributor; 243 struct rb_root service_conns; /* Service connections */ 244 seqlock_t service_conn_lock; 245 spinlock_t lock; /* access lock */ 246 unsigned int if_mtu; /* interface MTU for this peer */ 247 unsigned int mtu; /* network MTU for this peer */ 248 unsigned int maxdata; /* data size (MTU - hdrsize) */ 249 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 250 int debug_id; /* debug ID for printks */ 251 int error_report; /* Net (+0) or local (+1000000) to distribute */ 252 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 253 struct sockaddr_rxrpc srx; /* remote address */ 254 255 /* calculated RTT cache */ 256 #define RXRPC_RTT_CACHE_SIZE 32 257 ktime_t rtt_last_req; /* Time of last RTT request */ 258 u64 rtt; /* Current RTT estimate (in nS) */ 259 u64 rtt_sum; /* Sum of cache contents */ 260 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 261 u8 rtt_cursor; /* next entry at which to insert */ 262 u8 rtt_usage; /* amount of cache actually used */ 263 }; 264 265 /* 266 * Keys for matching a connection. 267 */ 268 struct rxrpc_conn_proto { 269 union { 270 struct { 271 u32 epoch; /* epoch of this connection */ 272 u32 cid; /* connection ID */ 273 }; 274 u64 index_key; 275 }; 276 }; 277 278 struct rxrpc_conn_parameters { 279 struct rxrpc_local *local; /* Representation of local endpoint */ 280 struct rxrpc_peer *peer; /* Remote endpoint */ 281 struct key *key; /* Security details */ 282 bool exclusive; /* T if conn is exclusive */ 283 u16 service_id; /* Service ID for this connection */ 284 u32 security_level; /* Security level selected */ 285 }; 286 287 /* 288 * Bits in the connection flags. 289 */ 290 enum rxrpc_conn_flag { 291 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 292 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 293 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 294 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 295 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 296 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 297 }; 298 299 /* 300 * Events that can be raised upon a connection. 301 */ 302 enum rxrpc_conn_event { 303 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 304 }; 305 306 /* 307 * The connection cache state. 308 */ 309 enum rxrpc_conn_cache_state { 310 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 311 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 312 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 313 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 314 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 315 RXRPC_CONN__NR_CACHE_STATES 316 }; 317 318 /* 319 * The connection protocol state. 320 */ 321 enum rxrpc_conn_proto_state { 322 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 323 RXRPC_CONN_CLIENT, /* Client connection */ 324 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 325 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 326 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 327 RXRPC_CONN_SERVICE, /* Service secured connection */ 328 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 329 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 330 RXRPC_CONN__NR_STATES 331 }; 332 333 /* 334 * RxRPC connection definition 335 * - matched by { local, peer, epoch, conn_id, direction } 336 * - each connection can only handle four simultaneous calls 337 */ 338 struct rxrpc_connection { 339 struct rxrpc_conn_proto proto; 340 struct rxrpc_conn_parameters params; 341 342 atomic_t usage; 343 struct rcu_head rcu; 344 struct list_head cache_link; 345 346 spinlock_t channel_lock; 347 unsigned char active_chans; /* Mask of active channels */ 348 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 349 struct list_head waiting_calls; /* Calls waiting for channels */ 350 struct rxrpc_channel { 351 struct rxrpc_call __rcu *call; /* Active call */ 352 u32 call_id; /* ID of current call */ 353 u32 call_counter; /* Call ID counter */ 354 u32 last_call; /* ID of last call */ 355 u8 last_type; /* Type of last packet */ 356 u16 last_service_id; 357 union { 358 u32 last_seq; 359 u32 last_abort; 360 }; 361 } channels[RXRPC_MAXCALLS]; 362 363 struct work_struct processor; /* connection event processor */ 364 union { 365 struct rb_node client_node; /* Node in local->client_conns */ 366 struct rb_node service_node; /* Node in peer->service_conns */ 367 }; 368 struct list_head proc_link; /* link in procfs list */ 369 struct list_head link; /* link in master connection list */ 370 struct sk_buff_head rx_queue; /* received conn-level packets */ 371 const struct rxrpc_security *security; /* applied security module */ 372 struct key *server_key; /* security for this service */ 373 struct crypto_skcipher *cipher; /* encryption handle */ 374 struct rxrpc_crypt csum_iv; /* packet checksum base */ 375 unsigned long flags; 376 unsigned long events; 377 unsigned long idle_timestamp; /* Time at which last became idle */ 378 spinlock_t state_lock; /* state-change lock */ 379 enum rxrpc_conn_cache_state cache_state; 380 enum rxrpc_conn_proto_state state; /* current state of connection */ 381 u32 local_abort; /* local abort code */ 382 u32 remote_abort; /* remote abort code */ 383 int debug_id; /* debug ID for printks */ 384 atomic_t serial; /* packet serial number counter */ 385 unsigned int hi_serial; /* highest serial number received */ 386 u32 security_nonce; /* response re-use preventer */ 387 u8 size_align; /* data size alignment (for security) */ 388 u8 security_size; /* security header size */ 389 u8 security_ix; /* security type */ 390 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 391 }; 392 393 /* 394 * Flags in call->flags. 395 */ 396 enum rxrpc_call_flag { 397 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 398 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 399 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 400 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 401 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 402 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 403 RXRPC_CALL_PINGING, /* Ping in process */ 404 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 405 }; 406 407 /* 408 * Events that can be raised on a call. 409 */ 410 enum rxrpc_call_event { 411 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 412 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 413 RXRPC_CALL_EV_TIMER, /* Timer expired */ 414 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 415 }; 416 417 /* 418 * The states that a call can be in. 419 */ 420 enum rxrpc_call_state { 421 RXRPC_CALL_UNINITIALISED, 422 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 423 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 424 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 425 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 426 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 427 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 428 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 429 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 430 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 431 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 432 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 433 RXRPC_CALL_COMPLETE, /* - call complete */ 434 NR__RXRPC_CALL_STATES 435 }; 436 437 /* 438 * Call completion condition (state == RXRPC_CALL_COMPLETE). 439 */ 440 enum rxrpc_call_completion { 441 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 442 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 443 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 444 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 445 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 446 NR__RXRPC_CALL_COMPLETIONS 447 }; 448 449 /* 450 * Call Tx congestion management modes. 451 */ 452 enum rxrpc_congest_mode { 453 RXRPC_CALL_SLOW_START, 454 RXRPC_CALL_CONGEST_AVOIDANCE, 455 RXRPC_CALL_PACKET_LOSS, 456 RXRPC_CALL_FAST_RETRANSMIT, 457 NR__RXRPC_CONGEST_MODES 458 }; 459 460 /* 461 * RxRPC call definition 462 * - matched by { connection, call_id } 463 */ 464 struct rxrpc_call { 465 struct rcu_head rcu; 466 struct rxrpc_connection *conn; /* connection carrying call */ 467 struct rxrpc_peer *peer; /* Peer record for remote address */ 468 struct rxrpc_sock __rcu *socket; /* socket responsible */ 469 unsigned long ack_at; /* When deferred ACK needs to happen */ 470 unsigned long resend_at; /* When next resend needs to happen */ 471 unsigned long expire_at; /* When the call times out */ 472 struct timer_list timer; /* Combined event timer */ 473 struct work_struct processor; /* Event processor */ 474 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 475 struct list_head link; /* link in master call list */ 476 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 477 struct hlist_node error_link; /* link in error distribution list */ 478 struct list_head accept_link; /* Link in rx->acceptq */ 479 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 480 struct list_head sock_link; /* Link in rx->sock_calls */ 481 struct rb_node sock_node; /* Node in rx->calls */ 482 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 483 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 484 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 485 unsigned long user_call_ID; /* user-defined call ID */ 486 unsigned long flags; 487 unsigned long events; 488 spinlock_t lock; 489 rwlock_t state_lock; /* lock for state transition */ 490 u32 abort_code; /* Local/remote abort code */ 491 int error; /* Local error incurred */ 492 enum rxrpc_call_state state; /* current state of call */ 493 enum rxrpc_call_completion completion; /* Call completion condition */ 494 atomic_t usage; 495 u16 service_id; /* service ID */ 496 u8 security_ix; /* Security type */ 497 u32 call_id; /* call ID on connection */ 498 u32 cid; /* connection ID plus channel index */ 499 int debug_id; /* debug ID for printks */ 500 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 501 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 502 503 /* Rx/Tx circular buffer, depending on phase. 504 * 505 * In the Rx phase, packets are annotated with 0 or the number of the 506 * segment of a jumbo packet each buffer refers to. There can be up to 507 * 47 segments in a maximum-size UDP packet. 508 * 509 * In the Tx phase, packets are annotated with which buffers have been 510 * acked. 511 */ 512 #define RXRPC_RXTX_BUFF_SIZE 64 513 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 514 #define RXRPC_INIT_RX_WINDOW_SIZE 32 515 struct sk_buff **rxtx_buffer; 516 u8 *rxtx_annotations; 517 #define RXRPC_TX_ANNO_ACK 0 518 #define RXRPC_TX_ANNO_UNACK 1 519 #define RXRPC_TX_ANNO_NAK 2 520 #define RXRPC_TX_ANNO_RETRANS 3 521 #define RXRPC_TX_ANNO_MASK 0x03 522 #define RXRPC_TX_ANNO_LAST 0x04 523 #define RXRPC_TX_ANNO_RESENT 0x08 524 525 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 526 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 527 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 528 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 529 * not hard-ACK'd packet follows this. 530 */ 531 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 532 533 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 534 * is fixed, we keep these numbers in terms of segments (ie. DATA 535 * packets) rather than bytes. 536 */ 537 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 538 u8 cong_cwnd; /* Congestion window size */ 539 u8 cong_extra; /* Extra to send for congestion management */ 540 u8 cong_ssthresh; /* Slow-start threshold */ 541 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 542 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 543 u8 cong_cumul_acks; /* Cumulative ACK count */ 544 ktime_t cong_tstamp; /* Last time cwnd was changed */ 545 546 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 547 * consumed packet follows this. 548 */ 549 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 550 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 551 u8 rx_winsize; /* Size of Rx window */ 552 u8 tx_winsize; /* Maximum size of Tx window */ 553 bool tx_phase; /* T if transmission phase, F if receive phase */ 554 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 555 556 /* receive-phase ACK management */ 557 u8 ackr_reason; /* reason to ACK */ 558 u16 ackr_skew; /* skew on packet being ACK'd */ 559 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 560 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 561 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 562 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 563 rxrpc_serial_t ackr_ping; /* Last ping sent */ 564 ktime_t ackr_ping_time; /* Time last ping sent */ 565 566 /* transmission-phase ACK management */ 567 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 568 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 569 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 570 }; 571 572 /* 573 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 574 */ 575 struct rxrpc_ack_summary { 576 u8 ack_reason; 577 u8 nr_acks; /* Number of ACKs in packet */ 578 u8 nr_nacks; /* Number of NACKs in packet */ 579 u8 nr_new_acks; /* Number of new ACKs in packet */ 580 u8 nr_new_nacks; /* Number of new NACKs in packet */ 581 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 582 bool new_low_nack; /* T if new low NACK found */ 583 bool retrans_timeo; /* T if reTx due to timeout happened */ 584 u8 flight_size; /* Number of unreceived transmissions */ 585 /* Place to stash values for tracing */ 586 enum rxrpc_congest_mode mode:8; 587 u8 cwnd; 588 u8 ssthresh; 589 u8 dup_acks; 590 u8 cumulative_acks; 591 }; 592 593 enum rxrpc_skb_trace { 594 rxrpc_skb_rx_cleaned, 595 rxrpc_skb_rx_freed, 596 rxrpc_skb_rx_got, 597 rxrpc_skb_rx_lost, 598 rxrpc_skb_rx_received, 599 rxrpc_skb_rx_rotated, 600 rxrpc_skb_rx_purged, 601 rxrpc_skb_rx_seen, 602 rxrpc_skb_tx_cleaned, 603 rxrpc_skb_tx_freed, 604 rxrpc_skb_tx_got, 605 rxrpc_skb_tx_new, 606 rxrpc_skb_tx_rotated, 607 rxrpc_skb_tx_seen, 608 rxrpc_skb__nr_trace 609 }; 610 611 extern const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7]; 612 613 enum rxrpc_conn_trace { 614 rxrpc_conn_new_client, 615 rxrpc_conn_new_service, 616 rxrpc_conn_queued, 617 rxrpc_conn_seen, 618 rxrpc_conn_got, 619 rxrpc_conn_put_client, 620 rxrpc_conn_put_service, 621 rxrpc_conn__nr_trace 622 }; 623 624 extern const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4]; 625 626 enum rxrpc_client_trace { 627 rxrpc_client_activate_chans, 628 rxrpc_client_alloc, 629 rxrpc_client_chan_activate, 630 rxrpc_client_chan_disconnect, 631 rxrpc_client_chan_pass, 632 rxrpc_client_chan_unstarted, 633 rxrpc_client_cleanup, 634 rxrpc_client_count, 635 rxrpc_client_discard, 636 rxrpc_client_duplicate, 637 rxrpc_client_exposed, 638 rxrpc_client_replace, 639 rxrpc_client_to_active, 640 rxrpc_client_to_culled, 641 rxrpc_client_to_idle, 642 rxrpc_client_to_inactive, 643 rxrpc_client_to_waiting, 644 rxrpc_client_uncount, 645 rxrpc_client__nr_trace 646 }; 647 648 extern const char rxrpc_client_traces[rxrpc_client__nr_trace][7]; 649 extern const char rxrpc_conn_cache_states[RXRPC_CONN__NR_CACHE_STATES][5]; 650 651 enum rxrpc_call_trace { 652 rxrpc_call_new_client, 653 rxrpc_call_new_service, 654 rxrpc_call_queued, 655 rxrpc_call_queued_ref, 656 rxrpc_call_seen, 657 rxrpc_call_connected, 658 rxrpc_call_release, 659 rxrpc_call_got, 660 rxrpc_call_got_userid, 661 rxrpc_call_got_kernel, 662 rxrpc_call_put, 663 rxrpc_call_put_userid, 664 rxrpc_call_put_kernel, 665 rxrpc_call_put_noqueue, 666 rxrpc_call_error, 667 rxrpc_call__nr_trace 668 }; 669 670 extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4]; 671 672 enum rxrpc_transmit_trace { 673 rxrpc_transmit_wait, 674 rxrpc_transmit_queue, 675 rxrpc_transmit_queue_last, 676 rxrpc_transmit_rotate, 677 rxrpc_transmit_rotate_last, 678 rxrpc_transmit_await_reply, 679 rxrpc_transmit_end, 680 rxrpc_transmit__nr_trace 681 }; 682 683 extern const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4]; 684 685 enum rxrpc_receive_trace { 686 rxrpc_receive_incoming, 687 rxrpc_receive_queue, 688 rxrpc_receive_queue_last, 689 rxrpc_receive_front, 690 rxrpc_receive_rotate, 691 rxrpc_receive_end, 692 rxrpc_receive__nr_trace 693 }; 694 695 extern const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4]; 696 697 enum rxrpc_recvmsg_trace { 698 rxrpc_recvmsg_enter, 699 rxrpc_recvmsg_wait, 700 rxrpc_recvmsg_dequeue, 701 rxrpc_recvmsg_hole, 702 rxrpc_recvmsg_next, 703 rxrpc_recvmsg_cont, 704 rxrpc_recvmsg_full, 705 rxrpc_recvmsg_data_return, 706 rxrpc_recvmsg_terminal, 707 rxrpc_recvmsg_to_be_accepted, 708 rxrpc_recvmsg_return, 709 rxrpc_recvmsg__nr_trace 710 }; 711 712 extern const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5]; 713 714 enum rxrpc_rtt_tx_trace { 715 rxrpc_rtt_tx_ping, 716 rxrpc_rtt_tx_data, 717 rxrpc_rtt_tx__nr_trace 718 }; 719 720 extern const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5]; 721 722 enum rxrpc_rtt_rx_trace { 723 rxrpc_rtt_rx_ping_response, 724 rxrpc_rtt_rx_requested_ack, 725 rxrpc_rtt_rx__nr_trace 726 }; 727 728 extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5]; 729 730 enum rxrpc_timer_trace { 731 rxrpc_timer_begin, 732 rxrpc_timer_init_for_reply, 733 rxrpc_timer_expired, 734 rxrpc_timer_set_for_ack, 735 rxrpc_timer_set_for_resend, 736 rxrpc_timer_set_for_send, 737 rxrpc_timer__nr_trace 738 }; 739 740 extern const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8]; 741 742 enum rxrpc_propose_ack_trace { 743 rxrpc_propose_ack_client_tx_end, 744 rxrpc_propose_ack_input_data, 745 rxrpc_propose_ack_ping_for_lost_ack, 746 rxrpc_propose_ack_ping_for_lost_reply, 747 rxrpc_propose_ack_ping_for_params, 748 rxrpc_propose_ack_respond_to_ack, 749 rxrpc_propose_ack_respond_to_ping, 750 rxrpc_propose_ack_retry_tx, 751 rxrpc_propose_ack_rotate_rx, 752 rxrpc_propose_ack_terminal_ack, 753 rxrpc_propose_ack__nr_trace 754 }; 755 756 enum rxrpc_propose_ack_outcome { 757 rxrpc_propose_ack_use, 758 rxrpc_propose_ack_update, 759 rxrpc_propose_ack_subsume, 760 rxrpc_propose_ack__nr_outcomes 761 }; 762 763 extern const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8]; 764 extern const char *const rxrpc_propose_ack_outcomes[rxrpc_propose_ack__nr_outcomes]; 765 766 enum rxrpc_congest_change { 767 rxrpc_cong_begin_retransmission, 768 rxrpc_cong_cleared_nacks, 769 rxrpc_cong_new_low_nack, 770 rxrpc_cong_no_change, 771 rxrpc_cong_progress, 772 rxrpc_cong_retransmit_again, 773 rxrpc_cong_rtt_window_end, 774 rxrpc_cong_saw_nack, 775 rxrpc_congest__nr_change 776 }; 777 778 extern const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10]; 779 extern const char rxrpc_congest_changes[rxrpc_congest__nr_change][9]; 780 781 extern const char *const rxrpc_pkts[]; 782 extern const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4]; 783 784 #include <trace/events/rxrpc.h> 785 786 /* 787 * af_rxrpc.c 788 */ 789 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 790 extern u32 rxrpc_epoch; 791 extern atomic_t rxrpc_debug_id; 792 extern struct workqueue_struct *rxrpc_workqueue; 793 794 /* 795 * call_accept.c 796 */ 797 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 798 void rxrpc_discard_prealloc(struct rxrpc_sock *); 799 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 800 struct rxrpc_connection *, 801 struct sk_buff *); 802 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 803 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 804 rxrpc_notify_rx_t); 805 int rxrpc_reject_call(struct rxrpc_sock *); 806 807 /* 808 * call_event.c 809 */ 810 void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace); 811 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 812 enum rxrpc_propose_ack_trace); 813 void rxrpc_process_call(struct work_struct *); 814 815 /* 816 * call_object.c 817 */ 818 extern const char *const rxrpc_call_states[]; 819 extern const char *const rxrpc_call_completions[]; 820 extern unsigned int rxrpc_max_call_lifetime; 821 extern struct kmem_cache *rxrpc_call_jar; 822 extern struct list_head rxrpc_calls; 823 extern rwlock_t rxrpc_call_lock; 824 825 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 826 struct rxrpc_call *rxrpc_alloc_call(gfp_t); 827 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 828 struct rxrpc_conn_parameters *, 829 struct sockaddr_rxrpc *, 830 unsigned long, gfp_t); 831 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 832 struct sk_buff *); 833 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 834 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 835 bool __rxrpc_queue_call(struct rxrpc_call *); 836 bool rxrpc_queue_call(struct rxrpc_call *); 837 void rxrpc_see_call(struct rxrpc_call *); 838 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 839 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 840 void rxrpc_cleanup_call(struct rxrpc_call *); 841 void __exit rxrpc_destroy_all_calls(void); 842 843 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 844 { 845 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 846 } 847 848 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 849 { 850 return !rxrpc_is_service_call(call); 851 } 852 853 /* 854 * Transition a call to the complete state. 855 */ 856 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 857 enum rxrpc_call_completion compl, 858 u32 abort_code, 859 int error) 860 { 861 if (call->state < RXRPC_CALL_COMPLETE) { 862 call->abort_code = abort_code; 863 call->error = error; 864 call->completion = compl, 865 call->state = RXRPC_CALL_COMPLETE; 866 wake_up(&call->waitq); 867 return true; 868 } 869 return false; 870 } 871 872 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 873 enum rxrpc_call_completion compl, 874 u32 abort_code, 875 int error) 876 { 877 bool ret; 878 879 write_lock_bh(&call->state_lock); 880 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 881 write_unlock_bh(&call->state_lock); 882 return ret; 883 } 884 885 /* 886 * Record that a call successfully completed. 887 */ 888 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 889 { 890 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 891 } 892 893 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 894 { 895 bool ret; 896 897 write_lock_bh(&call->state_lock); 898 ret = __rxrpc_call_completed(call); 899 write_unlock_bh(&call->state_lock); 900 return ret; 901 } 902 903 /* 904 * Record that a call is locally aborted. 905 */ 906 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 907 rxrpc_seq_t seq, 908 u32 abort_code, int error) 909 { 910 trace_rxrpc_abort(why, call->cid, call->call_id, seq, 911 abort_code, error); 912 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 913 abort_code, error); 914 } 915 916 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 917 rxrpc_seq_t seq, u32 abort_code, int error) 918 { 919 bool ret; 920 921 write_lock_bh(&call->state_lock); 922 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 923 write_unlock_bh(&call->state_lock); 924 return ret; 925 } 926 927 /* 928 * conn_client.c 929 */ 930 extern unsigned int rxrpc_max_client_connections; 931 extern unsigned int rxrpc_reap_client_connections; 932 extern unsigned int rxrpc_conn_idle_client_expiry; 933 extern unsigned int rxrpc_conn_idle_client_fast_expiry; 934 extern struct idr rxrpc_client_conn_ids; 935 936 void rxrpc_destroy_client_conn_ids(void); 937 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 938 struct sockaddr_rxrpc *, gfp_t); 939 void rxrpc_expose_client_call(struct rxrpc_call *); 940 void rxrpc_disconnect_client_call(struct rxrpc_call *); 941 void rxrpc_put_client_conn(struct rxrpc_connection *); 942 void __exit rxrpc_destroy_all_client_connections(void); 943 944 /* 945 * conn_event.c 946 */ 947 void rxrpc_process_connection(struct work_struct *); 948 949 /* 950 * conn_object.c 951 */ 952 extern unsigned int rxrpc_connection_expiry; 953 extern struct list_head rxrpc_connections; 954 extern struct list_head rxrpc_connection_proc_list; 955 extern rwlock_t rxrpc_connection_lock; 956 957 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 958 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 959 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 960 struct sk_buff *); 961 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 962 void rxrpc_disconnect_call(struct rxrpc_call *); 963 void rxrpc_kill_connection(struct rxrpc_connection *); 964 bool rxrpc_queue_conn(struct rxrpc_connection *); 965 void rxrpc_see_connection(struct rxrpc_connection *); 966 void rxrpc_get_connection(struct rxrpc_connection *); 967 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 968 void rxrpc_put_service_conn(struct rxrpc_connection *); 969 void __exit rxrpc_destroy_all_connections(void); 970 971 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 972 { 973 return conn->out_clientflag; 974 } 975 976 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 977 { 978 return !rxrpc_conn_is_client(conn); 979 } 980 981 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 982 { 983 if (!conn) 984 return; 985 986 if (rxrpc_conn_is_client(conn)) 987 rxrpc_put_client_conn(conn); 988 else 989 rxrpc_put_service_conn(conn); 990 } 991 992 /* 993 * conn_service.c 994 */ 995 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 996 struct sk_buff *); 997 struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t); 998 void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *); 999 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 1000 1001 /* 1002 * input.c 1003 */ 1004 void rxrpc_data_ready(struct sock *); 1005 1006 /* 1007 * insecure.c 1008 */ 1009 extern const struct rxrpc_security rxrpc_no_security; 1010 1011 /* 1012 * key.c 1013 */ 1014 extern struct key_type key_type_rxrpc; 1015 extern struct key_type key_type_rxrpc_s; 1016 1017 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 1018 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 1019 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 1020 u32); 1021 1022 /* 1023 * local_event.c 1024 */ 1025 extern void rxrpc_process_local_events(struct rxrpc_local *); 1026 1027 /* 1028 * local_object.c 1029 */ 1030 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); 1031 void __rxrpc_put_local(struct rxrpc_local *); 1032 void __exit rxrpc_destroy_all_locals(void); 1033 1034 static inline void rxrpc_get_local(struct rxrpc_local *local) 1035 { 1036 atomic_inc(&local->usage); 1037 } 1038 1039 static inline 1040 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 1041 { 1042 return atomic_inc_not_zero(&local->usage) ? local : NULL; 1043 } 1044 1045 static inline void rxrpc_put_local(struct rxrpc_local *local) 1046 { 1047 if (local && atomic_dec_and_test(&local->usage)) 1048 __rxrpc_put_local(local); 1049 } 1050 1051 static inline void rxrpc_queue_local(struct rxrpc_local *local) 1052 { 1053 rxrpc_queue_work(&local->processor); 1054 } 1055 1056 /* 1057 * misc.c 1058 */ 1059 extern unsigned int rxrpc_max_backlog __read_mostly; 1060 extern unsigned int rxrpc_requested_ack_delay; 1061 extern unsigned int rxrpc_soft_ack_delay; 1062 extern unsigned int rxrpc_idle_ack_delay; 1063 extern unsigned int rxrpc_rx_window_size; 1064 extern unsigned int rxrpc_rx_mtu; 1065 extern unsigned int rxrpc_rx_jumbo_max; 1066 extern unsigned int rxrpc_resend_timeout; 1067 1068 extern const s8 rxrpc_ack_priority[]; 1069 1070 /* 1071 * output.c 1072 */ 1073 int rxrpc_send_call_packet(struct rxrpc_call *, u8); 1074 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1075 void rxrpc_reject_packets(struct rxrpc_local *); 1076 1077 /* 1078 * peer_event.c 1079 */ 1080 void rxrpc_error_report(struct sock *); 1081 void rxrpc_peer_error_distributor(struct work_struct *); 1082 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1083 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1084 1085 /* 1086 * peer_object.c 1087 */ 1088 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1089 const struct sockaddr_rxrpc *); 1090 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1091 struct sockaddr_rxrpc *, gfp_t); 1092 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1093 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1094 struct rxrpc_peer *); 1095 1096 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) 1097 { 1098 atomic_inc(&peer->usage); 1099 return peer; 1100 } 1101 1102 static inline 1103 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 1104 { 1105 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 1106 } 1107 1108 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 1109 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 1110 { 1111 if (peer && atomic_dec_and_test(&peer->usage)) 1112 __rxrpc_put_peer(peer); 1113 } 1114 1115 /* 1116 * proc.c 1117 */ 1118 extern const struct file_operations rxrpc_call_seq_fops; 1119 extern const struct file_operations rxrpc_connection_seq_fops; 1120 1121 /* 1122 * recvmsg.c 1123 */ 1124 void rxrpc_notify_socket(struct rxrpc_call *); 1125 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1126 1127 /* 1128 * rxkad.c 1129 */ 1130 #ifdef CONFIG_RXKAD 1131 extern const struct rxrpc_security rxkad; 1132 #endif 1133 1134 /* 1135 * security.c 1136 */ 1137 int __init rxrpc_init_security(void); 1138 void rxrpc_exit_security(void); 1139 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1140 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1141 1142 /* 1143 * sendmsg.c 1144 */ 1145 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1146 1147 /* 1148 * skbuff.c 1149 */ 1150 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1151 void rxrpc_packet_destructor(struct sk_buff *); 1152 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1153 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1154 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1155 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1156 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1157 void rxrpc_purge_queue(struct sk_buff_head *); 1158 1159 /* 1160 * sysctl.c 1161 */ 1162 #ifdef CONFIG_SYSCTL 1163 extern int __init rxrpc_sysctl_init(void); 1164 extern void rxrpc_sysctl_exit(void); 1165 #else 1166 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1167 static inline void rxrpc_sysctl_exit(void) {} 1168 #endif 1169 1170 /* 1171 * utils.c 1172 */ 1173 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1174 1175 static inline bool before(u32 seq1, u32 seq2) 1176 { 1177 return (s32)(seq1 - seq2) < 0; 1178 } 1179 static inline bool before_eq(u32 seq1, u32 seq2) 1180 { 1181 return (s32)(seq1 - seq2) <= 0; 1182 } 1183 static inline bool after(u32 seq1, u32 seq2) 1184 { 1185 return (s32)(seq1 - seq2) > 0; 1186 } 1187 static inline bool after_eq(u32 seq1, u32 seq2) 1188 { 1189 return (s32)(seq1 - seq2) >= 0; 1190 } 1191 1192 /* 1193 * debug tracing 1194 */ 1195 extern unsigned int rxrpc_debug; 1196 1197 #define dbgprintk(FMT,...) \ 1198 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1199 1200 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1201 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1202 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1203 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1204 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1205 1206 1207 #if defined(__KDEBUG) 1208 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1209 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1210 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1211 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1212 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1213 1214 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1215 #define RXRPC_DEBUG_KENTER 0x01 1216 #define RXRPC_DEBUG_KLEAVE 0x02 1217 #define RXRPC_DEBUG_KDEBUG 0x04 1218 #define RXRPC_DEBUG_KPROTO 0x08 1219 #define RXRPC_DEBUG_KNET 0x10 1220 1221 #define _enter(FMT,...) \ 1222 do { \ 1223 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1224 kenter(FMT,##__VA_ARGS__); \ 1225 } while (0) 1226 1227 #define _leave(FMT,...) \ 1228 do { \ 1229 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1230 kleave(FMT,##__VA_ARGS__); \ 1231 } while (0) 1232 1233 #define _debug(FMT,...) \ 1234 do { \ 1235 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1236 kdebug(FMT,##__VA_ARGS__); \ 1237 } while (0) 1238 1239 #define _proto(FMT,...) \ 1240 do { \ 1241 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1242 kproto(FMT,##__VA_ARGS__); \ 1243 } while (0) 1244 1245 #define _net(FMT,...) \ 1246 do { \ 1247 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1248 knet(FMT,##__VA_ARGS__); \ 1249 } while (0) 1250 1251 #else 1252 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1253 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1254 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1255 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1256 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1257 #endif 1258 1259 /* 1260 * debug assertion checking 1261 */ 1262 #if 1 // defined(__KDEBUGALL) 1263 1264 #define ASSERT(X) \ 1265 do { \ 1266 if (unlikely(!(X))) { \ 1267 pr_err("Assertion failed\n"); \ 1268 BUG(); \ 1269 } \ 1270 } while (0) 1271 1272 #define ASSERTCMP(X, OP, Y) \ 1273 do { \ 1274 __typeof__(X) _x = (X); \ 1275 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1276 if (unlikely(!(_x OP _y))) { \ 1277 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1278 (unsigned long)_x, (unsigned long)_x, #OP, \ 1279 (unsigned long)_y, (unsigned long)_y); \ 1280 BUG(); \ 1281 } \ 1282 } while (0) 1283 1284 #define ASSERTIF(C, X) \ 1285 do { \ 1286 if (unlikely((C) && !(X))) { \ 1287 pr_err("Assertion failed\n"); \ 1288 BUG(); \ 1289 } \ 1290 } while (0) 1291 1292 #define ASSERTIFCMP(C, X, OP, Y) \ 1293 do { \ 1294 __typeof__(X) _x = (X); \ 1295 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1296 if (unlikely((C) && !(_x OP _y))) { \ 1297 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1298 (unsigned long)_x, (unsigned long)_x, #OP, \ 1299 (unsigned long)_y, (unsigned long)_y); \ 1300 BUG(); \ 1301 } \ 1302 } while (0) 1303 1304 #else 1305 1306 #define ASSERT(X) \ 1307 do { \ 1308 } while (0) 1309 1310 #define ASSERTCMP(X, OP, Y) \ 1311 do { \ 1312 } while (0) 1313 1314 #define ASSERTIF(C, X) \ 1315 do { \ 1316 } while (0) 1317 1318 #define ASSERTIFCMP(C, X, OP, Y) \ 1319 do { \ 1320 } while (0) 1321 1322 #endif /* __KDEBUGALL */ 1323