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