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