1 /* AF_RXRPC internal definitions 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/atomic.h> 13 #include <linux/seqlock.h> 14 #include <net/net_namespace.h> 15 #include <net/netns/generic.h> 16 #include <net/sock.h> 17 #include <net/af_rxrpc.h> 18 #include "protocol.h" 19 20 #if 0 21 #define CHECK_SLAB_OKAY(X) \ 22 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 23 (POISON_FREE << 8 | POISON_FREE)) 24 #else 25 #define CHECK_SLAB_OKAY(X) do {} while (0) 26 #endif 27 28 #define FCRYPT_BSIZE 8 29 struct rxrpc_crypt { 30 union { 31 u8 x[FCRYPT_BSIZE]; 32 __be32 n[2]; 33 }; 34 } __attribute__((aligned(8))); 35 36 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 37 #define rxrpc_queue_delayed_work(WS,D) \ 38 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 39 40 struct rxrpc_connection; 41 42 /* 43 * Mark applied to socket buffers. 44 */ 45 enum rxrpc_skb_mark { 46 RXRPC_SKB_MARK_DATA, /* data message */ 47 RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ 48 RXRPC_SKB_MARK_BUSY, /* server busy message */ 49 RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ 50 RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ 51 RXRPC_SKB_MARK_NET_ERROR, /* network error message */ 52 RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ 53 RXRPC_SKB_MARK_NEW_CALL, /* local error message */ 54 }; 55 56 /* 57 * sk_state for RxRPC sockets 58 */ 59 enum { 60 RXRPC_UNBOUND = 0, 61 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 62 RXRPC_CLIENT_BOUND, /* client local address bound */ 63 RXRPC_SERVER_BOUND, /* server local address bound */ 64 RXRPC_SERVER_BOUND2, /* second server local address bound */ 65 RXRPC_SERVER_LISTENING, /* server listening for connections */ 66 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 67 RXRPC_CLOSE, /* socket is being closed */ 68 }; 69 70 /* 71 * Per-network namespace data. 72 */ 73 struct rxrpc_net { 74 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 75 u32 epoch; /* Local epoch for detecting local-end reset */ 76 struct list_head calls; /* List of calls active in this namespace */ 77 rwlock_t call_lock; /* Lock for ->calls */ 78 79 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 80 struct list_head service_conns; /* Service conns in this namespace */ 81 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 82 struct delayed_work service_conn_reaper; 83 84 unsigned int nr_client_conns; 85 unsigned int nr_active_client_conns; 86 bool kill_all_client_conns; 87 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 88 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 89 struct list_head waiting_client_conns; 90 struct list_head active_client_conns; 91 struct list_head idle_client_conns; 92 struct delayed_work client_conn_reaper; 93 94 struct list_head local_endpoints; 95 struct mutex local_mutex; /* Lock for ->local_endpoints */ 96 97 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 98 DECLARE_HASHTABLE (peer_hash, 10); 99 }; 100 101 /* 102 * Service backlog preallocation. 103 * 104 * This contains circular buffers of preallocated peers, connections and calls 105 * for incoming service calls and their head and tail pointers. This allows 106 * calls to be set up in the data_ready handler, thereby avoiding the need to 107 * shuffle packets around so much. 108 */ 109 struct rxrpc_backlog { 110 unsigned short peer_backlog_head; 111 unsigned short peer_backlog_tail; 112 unsigned short conn_backlog_head; 113 unsigned short conn_backlog_tail; 114 unsigned short call_backlog_head; 115 unsigned short call_backlog_tail; 116 #define RXRPC_BACKLOG_MAX 32 117 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 118 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 119 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 120 }; 121 122 /* 123 * RxRPC socket definition 124 */ 125 struct rxrpc_sock { 126 /* WARNING: sk has to be the first member */ 127 struct sock sk; 128 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 129 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 130 struct rxrpc_local *local; /* local endpoint */ 131 struct rxrpc_backlog *backlog; /* Preallocation for services */ 132 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 133 struct list_head sock_calls; /* List of calls owned by this socket */ 134 struct list_head to_be_accepted; /* calls awaiting acceptance */ 135 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 136 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 137 struct key *key; /* security for this socket */ 138 struct key *securities; /* list of server security descriptors */ 139 struct rb_root calls; /* User ID -> call mapping */ 140 unsigned long flags; 141 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 142 rwlock_t call_lock; /* lock for calls */ 143 u32 min_sec_level; /* minimum security level */ 144 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 145 bool exclusive; /* Exclusive connection for a client socket */ 146 u16 second_service; /* Additional service bound to the endpoint */ 147 struct { 148 /* Service upgrade information */ 149 u16 from; /* Service ID to upgrade (if not 0) */ 150 u16 to; /* service ID to upgrade to */ 151 } service_upgrade; 152 sa_family_t family; /* Protocol family created with */ 153 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 154 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 155 }; 156 157 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 158 159 /* 160 * CPU-byteorder normalised Rx packet header. 161 */ 162 struct rxrpc_host_header { 163 u32 epoch; /* client boot timestamp */ 164 u32 cid; /* connection and channel ID */ 165 u32 callNumber; /* call ID (0 for connection-level packets) */ 166 u32 seq; /* sequence number of pkt in call stream */ 167 u32 serial; /* serial number of pkt sent to network */ 168 u8 type; /* packet type */ 169 u8 flags; /* packet flags */ 170 u8 userStatus; /* app-layer defined status */ 171 u8 securityIndex; /* security protocol ID */ 172 union { 173 u16 _rsvd; /* reserved */ 174 u16 cksum; /* kerberos security checksum */ 175 }; 176 u16 serviceId; /* service ID */ 177 } __packed; 178 179 /* 180 * RxRPC socket buffer private variables 181 * - max 48 bytes (struct sk_buff::cb) 182 */ 183 struct rxrpc_skb_priv { 184 union { 185 u8 nr_jumbo; /* Number of jumbo subpackets */ 186 }; 187 union { 188 int remain; /* amount of space remaining for next write */ 189 }; 190 191 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 192 }; 193 194 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 195 196 /* 197 * RxRPC security module interface 198 */ 199 struct rxrpc_security { 200 const char *name; /* name of this service */ 201 u8 security_index; /* security type provided */ 202 203 /* Initialise a security service */ 204 int (*init)(void); 205 206 /* Clean up a security service */ 207 void (*exit)(void); 208 209 /* initialise a connection's security */ 210 int (*init_connection_security)(struct rxrpc_connection *); 211 212 /* prime a connection's packet security */ 213 int (*prime_packet_security)(struct rxrpc_connection *); 214 215 /* impose security on a packet */ 216 int (*secure_packet)(struct rxrpc_call *, 217 struct sk_buff *, 218 size_t, 219 void *); 220 221 /* verify the security on a received packet */ 222 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 223 unsigned int, unsigned int, rxrpc_seq_t, u16); 224 225 /* Locate the data in a received packet that has been verified. */ 226 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 227 unsigned int *, unsigned int *); 228 229 /* issue a challenge */ 230 int (*issue_challenge)(struct rxrpc_connection *); 231 232 /* respond to a challenge */ 233 int (*respond_to_challenge)(struct rxrpc_connection *, 234 struct sk_buff *, 235 u32 *); 236 237 /* verify a response */ 238 int (*verify_response)(struct rxrpc_connection *, 239 struct sk_buff *, 240 u32 *); 241 242 /* clear connection security */ 243 void (*clear)(struct rxrpc_connection *); 244 }; 245 246 /* 247 * RxRPC local transport endpoint description 248 * - owned by a single AF_RXRPC socket 249 * - pointed to by transport socket struct sk_user_data 250 */ 251 struct rxrpc_local { 252 struct rcu_head rcu; 253 atomic_t usage; 254 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 255 struct list_head link; 256 struct socket *socket; /* my UDP socket */ 257 struct work_struct processor; 258 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 259 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 260 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 261 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 262 struct rb_root client_conns; /* Client connections by socket params */ 263 spinlock_t client_conns_lock; /* Lock for client_conns */ 264 spinlock_t lock; /* access lock */ 265 rwlock_t services_lock; /* lock for services list */ 266 int debug_id; /* debug ID for printks */ 267 bool dead; 268 struct sockaddr_rxrpc srx; /* local address */ 269 }; 270 271 /* 272 * RxRPC remote transport endpoint definition 273 * - matched by local endpoint, remote port, address and protocol type 274 */ 275 struct rxrpc_peer { 276 struct rcu_head rcu; /* This must be first */ 277 atomic_t usage; 278 unsigned long hash_key; 279 struct hlist_node hash_link; 280 struct rxrpc_local *local; 281 struct hlist_head error_targets; /* targets for net error distribution */ 282 struct work_struct error_distributor; 283 struct rb_root service_conns; /* Service connections */ 284 seqlock_t service_conn_lock; 285 spinlock_t lock; /* access lock */ 286 unsigned int if_mtu; /* interface MTU for this peer */ 287 unsigned int mtu; /* network MTU for this peer */ 288 unsigned int maxdata; /* data size (MTU - hdrsize) */ 289 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 290 int debug_id; /* debug ID for printks */ 291 int error_report; /* Net (+0) or local (+1000000) to distribute */ 292 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 293 struct sockaddr_rxrpc srx; /* remote address */ 294 295 /* calculated RTT cache */ 296 #define RXRPC_RTT_CACHE_SIZE 32 297 ktime_t rtt_last_req; /* Time of last RTT request */ 298 u64 rtt; /* Current RTT estimate (in nS) */ 299 u64 rtt_sum; /* Sum of cache contents */ 300 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 301 u8 rtt_cursor; /* next entry at which to insert */ 302 u8 rtt_usage; /* amount of cache actually used */ 303 304 u8 cong_cwnd; /* Congestion window size */ 305 }; 306 307 /* 308 * Keys for matching a connection. 309 */ 310 struct rxrpc_conn_proto { 311 union { 312 struct { 313 u32 epoch; /* epoch of this connection */ 314 u32 cid; /* connection ID */ 315 }; 316 u64 index_key; 317 }; 318 }; 319 320 struct rxrpc_conn_parameters { 321 struct rxrpc_local *local; /* Representation of local endpoint */ 322 struct rxrpc_peer *peer; /* Remote endpoint */ 323 struct key *key; /* Security details */ 324 bool exclusive; /* T if conn is exclusive */ 325 bool upgrade; /* T if service ID can be upgraded */ 326 u16 service_id; /* Service ID for this connection */ 327 u32 security_level; /* Security level selected */ 328 }; 329 330 /* 331 * Bits in the connection flags. 332 */ 333 enum rxrpc_conn_flag { 334 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 335 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 336 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 337 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 338 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 339 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 340 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 341 }; 342 343 /* 344 * Events that can be raised upon a connection. 345 */ 346 enum rxrpc_conn_event { 347 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 348 }; 349 350 /* 351 * The connection cache state. 352 */ 353 enum rxrpc_conn_cache_state { 354 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 355 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 356 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 357 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 358 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 359 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 360 RXRPC_CONN__NR_CACHE_STATES 361 }; 362 363 /* 364 * The connection protocol state. 365 */ 366 enum rxrpc_conn_proto_state { 367 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 368 RXRPC_CONN_CLIENT, /* Client connection */ 369 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 370 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 371 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 372 RXRPC_CONN_SERVICE, /* Service secured connection */ 373 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 374 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 375 RXRPC_CONN__NR_STATES 376 }; 377 378 /* 379 * RxRPC connection definition 380 * - matched by { local, peer, epoch, conn_id, direction } 381 * - each connection can only handle four simultaneous calls 382 */ 383 struct rxrpc_connection { 384 struct rxrpc_conn_proto proto; 385 struct rxrpc_conn_parameters params; 386 387 atomic_t usage; 388 struct rcu_head rcu; 389 struct list_head cache_link; 390 391 spinlock_t channel_lock; 392 unsigned char active_chans; /* Mask of active channels */ 393 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 394 struct list_head waiting_calls; /* Calls waiting for channels */ 395 struct rxrpc_channel { 396 struct rxrpc_call __rcu *call; /* Active call */ 397 u32 call_id; /* ID of current call */ 398 u32 call_counter; /* Call ID counter */ 399 u32 last_call; /* ID of last call */ 400 u8 last_type; /* Type of last packet */ 401 union { 402 u32 last_seq; 403 u32 last_abort; 404 }; 405 } channels[RXRPC_MAXCALLS]; 406 407 struct work_struct processor; /* connection event processor */ 408 union { 409 struct rb_node client_node; /* Node in local->client_conns */ 410 struct rb_node service_node; /* Node in peer->service_conns */ 411 }; 412 struct list_head proc_link; /* link in procfs list */ 413 struct list_head link; /* link in master connection list */ 414 struct sk_buff_head rx_queue; /* received conn-level packets */ 415 const struct rxrpc_security *security; /* applied security module */ 416 struct key *server_key; /* security for this service */ 417 struct crypto_skcipher *cipher; /* encryption handle */ 418 struct rxrpc_crypt csum_iv; /* packet checksum base */ 419 unsigned long flags; 420 unsigned long events; 421 unsigned long idle_timestamp; /* Time at which last became idle */ 422 spinlock_t state_lock; /* state-change lock */ 423 enum rxrpc_conn_cache_state cache_state; 424 enum rxrpc_conn_proto_state state; /* current state of connection */ 425 u32 local_abort; /* local abort code */ 426 u32 remote_abort; /* remote abort code */ 427 int debug_id; /* debug ID for printks */ 428 atomic_t serial; /* packet serial number counter */ 429 unsigned int hi_serial; /* highest serial number received */ 430 u32 security_nonce; /* response re-use preventer */ 431 u16 service_id; /* Service ID, possibly upgraded */ 432 u8 size_align; /* data size alignment (for security) */ 433 u8 security_size; /* security header size */ 434 u8 security_ix; /* security type */ 435 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 436 }; 437 438 /* 439 * Flags in call->flags. 440 */ 441 enum rxrpc_call_flag { 442 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 443 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 444 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 445 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 446 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 447 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 448 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 449 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 450 RXRPC_CALL_PINGING, /* Ping in process */ 451 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 452 }; 453 454 /* 455 * Events that can be raised on a call. 456 */ 457 enum rxrpc_call_event { 458 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 459 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 460 RXRPC_CALL_EV_TIMER, /* Timer expired */ 461 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 462 RXRPC_CALL_EV_PING, /* Ping send required */ 463 }; 464 465 /* 466 * The states that a call can be in. 467 */ 468 enum rxrpc_call_state { 469 RXRPC_CALL_UNINITIALISED, 470 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 471 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 472 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 473 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 474 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 475 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 476 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 477 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 478 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 479 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 480 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 481 RXRPC_CALL_COMPLETE, /* - call complete */ 482 NR__RXRPC_CALL_STATES 483 }; 484 485 /* 486 * Call Tx congestion management modes. 487 */ 488 enum rxrpc_congest_mode { 489 RXRPC_CALL_SLOW_START, 490 RXRPC_CALL_CONGEST_AVOIDANCE, 491 RXRPC_CALL_PACKET_LOSS, 492 RXRPC_CALL_FAST_RETRANSMIT, 493 NR__RXRPC_CONGEST_MODES 494 }; 495 496 /* 497 * RxRPC call definition 498 * - matched by { connection, call_id } 499 */ 500 struct rxrpc_call { 501 struct rcu_head rcu; 502 struct rxrpc_connection *conn; /* connection carrying call */ 503 struct rxrpc_peer *peer; /* Peer record for remote address */ 504 struct rxrpc_sock __rcu *socket; /* socket responsible */ 505 struct mutex user_mutex; /* User access mutex */ 506 ktime_t ack_at; /* When deferred ACK needs to happen */ 507 ktime_t resend_at; /* When next resend needs to happen */ 508 ktime_t ping_at; /* When next to send a ping */ 509 ktime_t expire_at; /* When the call times out */ 510 struct timer_list timer; /* Combined event timer */ 511 struct work_struct processor; /* Event processor */ 512 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 513 struct list_head link; /* link in master call list */ 514 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 515 struct hlist_node error_link; /* link in error distribution list */ 516 struct list_head accept_link; /* Link in rx->acceptq */ 517 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 518 struct list_head sock_link; /* Link in rx->sock_calls */ 519 struct rb_node sock_node; /* Node in rx->calls */ 520 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 521 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 522 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 523 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 524 unsigned long user_call_ID; /* user-defined call ID */ 525 unsigned long flags; 526 unsigned long events; 527 spinlock_t lock; 528 spinlock_t notify_lock; /* Kernel notification lock */ 529 rwlock_t state_lock; /* lock for state transition */ 530 u32 abort_code; /* Local/remote abort code */ 531 int error; /* Local error incurred */ 532 enum rxrpc_call_state state; /* current state of call */ 533 enum rxrpc_call_completion completion; /* Call completion condition */ 534 atomic_t usage; 535 u16 service_id; /* service ID */ 536 u8 security_ix; /* Security type */ 537 u32 call_id; /* call ID on connection */ 538 u32 cid; /* connection ID plus channel index */ 539 int debug_id; /* debug ID for printks */ 540 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 541 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 542 543 /* Rx/Tx circular buffer, depending on phase. 544 * 545 * In the Rx phase, packets are annotated with 0 or the number of the 546 * segment of a jumbo packet each buffer refers to. There can be up to 547 * 47 segments in a maximum-size UDP packet. 548 * 549 * In the Tx phase, packets are annotated with which buffers have been 550 * acked. 551 */ 552 #define RXRPC_RXTX_BUFF_SIZE 64 553 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 554 #define RXRPC_INIT_RX_WINDOW_SIZE 32 555 struct sk_buff **rxtx_buffer; 556 u8 *rxtx_annotations; 557 #define RXRPC_TX_ANNO_ACK 0 558 #define RXRPC_TX_ANNO_UNACK 1 559 #define RXRPC_TX_ANNO_NAK 2 560 #define RXRPC_TX_ANNO_RETRANS 3 561 #define RXRPC_TX_ANNO_MASK 0x03 562 #define RXRPC_TX_ANNO_LAST 0x04 563 #define RXRPC_TX_ANNO_RESENT 0x08 564 565 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 566 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 567 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 568 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 569 * not hard-ACK'd packet follows this. 570 */ 571 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 572 573 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 574 * is fixed, we keep these numbers in terms of segments (ie. DATA 575 * packets) rather than bytes. 576 */ 577 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 578 u8 cong_cwnd; /* Congestion window size */ 579 u8 cong_extra; /* Extra to send for congestion management */ 580 u8 cong_ssthresh; /* Slow-start threshold */ 581 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 582 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 583 u8 cong_cumul_acks; /* Cumulative ACK count */ 584 ktime_t cong_tstamp; /* Last time cwnd was changed */ 585 586 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 587 * consumed packet follows this. 588 */ 589 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 590 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 591 u8 rx_winsize; /* Size of Rx window */ 592 u8 tx_winsize; /* Maximum size of Tx window */ 593 bool tx_phase; /* T if transmission phase, F if receive phase */ 594 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 595 596 /* receive-phase ACK management */ 597 u8 ackr_reason; /* reason to ACK */ 598 u16 ackr_skew; /* skew on packet being ACK'd */ 599 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 600 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 601 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 602 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 603 604 /* ping management */ 605 rxrpc_serial_t ping_serial; /* Last ping sent */ 606 ktime_t ping_time; /* Time last ping sent */ 607 608 /* transmission-phase ACK management */ 609 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 610 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 611 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 612 }; 613 614 /* 615 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 616 */ 617 struct rxrpc_ack_summary { 618 u8 ack_reason; 619 u8 nr_acks; /* Number of ACKs in packet */ 620 u8 nr_nacks; /* Number of NACKs in packet */ 621 u8 nr_new_acks; /* Number of new ACKs in packet */ 622 u8 nr_new_nacks; /* Number of new NACKs in packet */ 623 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 624 bool new_low_nack; /* T if new low NACK found */ 625 bool retrans_timeo; /* T if reTx due to timeout happened */ 626 u8 flight_size; /* Number of unreceived transmissions */ 627 /* Place to stash values for tracing */ 628 enum rxrpc_congest_mode mode:8; 629 u8 cwnd; 630 u8 ssthresh; 631 u8 dup_acks; 632 u8 cumulative_acks; 633 }; 634 635 #include <trace/events/rxrpc.h> 636 637 /* 638 * af_rxrpc.c 639 */ 640 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 641 extern atomic_t rxrpc_debug_id; 642 extern struct workqueue_struct *rxrpc_workqueue; 643 644 /* 645 * call_accept.c 646 */ 647 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 648 void rxrpc_discard_prealloc(struct rxrpc_sock *); 649 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 650 struct rxrpc_connection *, 651 struct sk_buff *); 652 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 653 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 654 rxrpc_notify_rx_t); 655 int rxrpc_reject_call(struct rxrpc_sock *); 656 657 /* 658 * call_event.c 659 */ 660 void __rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t); 661 void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t); 662 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 663 enum rxrpc_propose_ack_trace); 664 void rxrpc_process_call(struct work_struct *); 665 666 /* 667 * call_object.c 668 */ 669 extern const char *const rxrpc_call_states[]; 670 extern const char *const rxrpc_call_completions[]; 671 extern unsigned int rxrpc_max_call_lifetime; 672 extern struct kmem_cache *rxrpc_call_jar; 673 674 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 675 struct rxrpc_call *rxrpc_alloc_call(gfp_t); 676 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 677 struct rxrpc_conn_parameters *, 678 struct sockaddr_rxrpc *, 679 unsigned long, s64, gfp_t); 680 int rxrpc_retry_client_call(struct rxrpc_sock *, 681 struct rxrpc_call *, 682 struct rxrpc_conn_parameters *, 683 struct sockaddr_rxrpc *, 684 gfp_t); 685 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 686 struct sk_buff *); 687 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 688 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 689 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 690 bool __rxrpc_queue_call(struct rxrpc_call *); 691 bool rxrpc_queue_call(struct rxrpc_call *); 692 void rxrpc_see_call(struct rxrpc_call *); 693 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 694 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 695 void rxrpc_cleanup_call(struct rxrpc_call *); 696 void rxrpc_destroy_all_calls(struct rxrpc_net *); 697 698 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 699 { 700 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 701 } 702 703 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 704 { 705 return !rxrpc_is_service_call(call); 706 } 707 708 /* 709 * Transition a call to the complete state. 710 */ 711 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 712 enum rxrpc_call_completion compl, 713 u32 abort_code, 714 int error) 715 { 716 if (call->state < RXRPC_CALL_COMPLETE) { 717 call->abort_code = abort_code; 718 call->error = error; 719 call->completion = compl, 720 call->state = RXRPC_CALL_COMPLETE; 721 wake_up(&call->waitq); 722 return true; 723 } 724 return false; 725 } 726 727 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 728 enum rxrpc_call_completion compl, 729 u32 abort_code, 730 int error) 731 { 732 bool ret; 733 734 write_lock_bh(&call->state_lock); 735 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 736 write_unlock_bh(&call->state_lock); 737 return ret; 738 } 739 740 /* 741 * Record that a call successfully completed. 742 */ 743 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 744 { 745 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 746 } 747 748 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 749 { 750 bool ret; 751 752 write_lock_bh(&call->state_lock); 753 ret = __rxrpc_call_completed(call); 754 write_unlock_bh(&call->state_lock); 755 return ret; 756 } 757 758 /* 759 * Record that a call is locally aborted. 760 */ 761 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 762 rxrpc_seq_t seq, 763 u32 abort_code, int error) 764 { 765 trace_rxrpc_abort(why, call->cid, call->call_id, seq, 766 abort_code, error); 767 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 768 abort_code, error); 769 } 770 771 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 772 rxrpc_seq_t seq, u32 abort_code, int error) 773 { 774 bool ret; 775 776 write_lock_bh(&call->state_lock); 777 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 778 write_unlock_bh(&call->state_lock); 779 return ret; 780 } 781 782 /* 783 * Abort a call due to a protocol error. 784 */ 785 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 786 struct sk_buff *skb, 787 const char *eproto_why, 788 const char *why, 789 u32 abort_code) 790 { 791 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 792 793 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 794 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 795 } 796 797 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 798 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 799 (abort_why), (abort_code)) 800 801 /* 802 * conn_client.c 803 */ 804 extern unsigned int rxrpc_max_client_connections; 805 extern unsigned int rxrpc_reap_client_connections; 806 extern unsigned int rxrpc_conn_idle_client_expiry; 807 extern unsigned int rxrpc_conn_idle_client_fast_expiry; 808 extern struct idr rxrpc_client_conn_ids; 809 810 void rxrpc_destroy_client_conn_ids(void); 811 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 812 struct sockaddr_rxrpc *, gfp_t); 813 void rxrpc_expose_client_call(struct rxrpc_call *); 814 void rxrpc_disconnect_client_call(struct rxrpc_call *); 815 void rxrpc_put_client_conn(struct rxrpc_connection *); 816 void rxrpc_discard_expired_client_conns(struct work_struct *); 817 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 818 819 /* 820 * conn_event.c 821 */ 822 void rxrpc_process_connection(struct work_struct *); 823 824 /* 825 * conn_object.c 826 */ 827 extern unsigned int rxrpc_connection_expiry; 828 829 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 830 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 831 struct sk_buff *); 832 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 833 void rxrpc_disconnect_call(struct rxrpc_call *); 834 void rxrpc_kill_connection(struct rxrpc_connection *); 835 bool rxrpc_queue_conn(struct rxrpc_connection *); 836 void rxrpc_see_connection(struct rxrpc_connection *); 837 void rxrpc_get_connection(struct rxrpc_connection *); 838 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 839 void rxrpc_put_service_conn(struct rxrpc_connection *); 840 void rxrpc_service_connection_reaper(struct work_struct *); 841 void rxrpc_destroy_all_connections(struct rxrpc_net *); 842 843 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 844 { 845 return conn->out_clientflag; 846 } 847 848 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 849 { 850 return !rxrpc_conn_is_client(conn); 851 } 852 853 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 854 { 855 if (!conn) 856 return; 857 858 if (rxrpc_conn_is_client(conn)) 859 rxrpc_put_client_conn(conn); 860 else 861 rxrpc_put_service_conn(conn); 862 } 863 864 /* 865 * conn_service.c 866 */ 867 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 868 struct sk_buff *); 869 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 870 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 871 struct rxrpc_connection *, struct sk_buff *); 872 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 873 874 /* 875 * input.c 876 */ 877 void rxrpc_data_ready(struct sock *); 878 879 /* 880 * insecure.c 881 */ 882 extern const struct rxrpc_security rxrpc_no_security; 883 884 /* 885 * key.c 886 */ 887 extern struct key_type key_type_rxrpc; 888 extern struct key_type key_type_rxrpc_s; 889 890 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 891 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 892 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 893 u32); 894 895 /* 896 * local_event.c 897 */ 898 extern void rxrpc_process_local_events(struct rxrpc_local *); 899 900 /* 901 * local_object.c 902 */ 903 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 904 void __rxrpc_put_local(struct rxrpc_local *); 905 void rxrpc_destroy_all_locals(struct rxrpc_net *); 906 907 static inline void rxrpc_get_local(struct rxrpc_local *local) 908 { 909 atomic_inc(&local->usage); 910 } 911 912 static inline 913 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 914 { 915 return atomic_inc_not_zero(&local->usage) ? local : NULL; 916 } 917 918 static inline void rxrpc_put_local(struct rxrpc_local *local) 919 { 920 if (local && atomic_dec_and_test(&local->usage)) 921 __rxrpc_put_local(local); 922 } 923 924 static inline void rxrpc_queue_local(struct rxrpc_local *local) 925 { 926 rxrpc_queue_work(&local->processor); 927 } 928 929 /* 930 * misc.c 931 */ 932 extern unsigned int rxrpc_max_backlog __read_mostly; 933 extern unsigned int rxrpc_requested_ack_delay; 934 extern unsigned int rxrpc_soft_ack_delay; 935 extern unsigned int rxrpc_idle_ack_delay; 936 extern unsigned int rxrpc_rx_window_size; 937 extern unsigned int rxrpc_rx_mtu; 938 extern unsigned int rxrpc_rx_jumbo_max; 939 extern unsigned int rxrpc_resend_timeout; 940 941 extern const s8 rxrpc_ack_priority[]; 942 943 /* 944 * net_ns.c 945 */ 946 extern unsigned int rxrpc_net_id; 947 extern struct pernet_operations rxrpc_net_ops; 948 949 static inline struct rxrpc_net *rxrpc_net(struct net *net) 950 { 951 return net_generic(net, rxrpc_net_id); 952 } 953 954 /* 955 * output.c 956 */ 957 int rxrpc_send_ack_packet(struct rxrpc_call *, bool); 958 int rxrpc_send_abort_packet(struct rxrpc_call *); 959 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 960 void rxrpc_reject_packets(struct rxrpc_local *); 961 962 /* 963 * peer_event.c 964 */ 965 void rxrpc_error_report(struct sock *); 966 void rxrpc_peer_error_distributor(struct work_struct *); 967 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 968 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 969 970 /* 971 * peer_object.c 972 */ 973 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 974 const struct sockaddr_rxrpc *); 975 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 976 struct sockaddr_rxrpc *, gfp_t); 977 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 978 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 979 struct rxrpc_peer *); 980 981 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) 982 { 983 atomic_inc(&peer->usage); 984 return peer; 985 } 986 987 static inline 988 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 989 { 990 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 991 } 992 993 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 994 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 995 { 996 if (peer && atomic_dec_and_test(&peer->usage)) 997 __rxrpc_put_peer(peer); 998 } 999 1000 /* 1001 * proc.c 1002 */ 1003 extern const struct file_operations rxrpc_call_seq_fops; 1004 extern const struct file_operations rxrpc_connection_seq_fops; 1005 1006 /* 1007 * recvmsg.c 1008 */ 1009 void rxrpc_notify_socket(struct rxrpc_call *); 1010 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1011 1012 /* 1013 * rxkad.c 1014 */ 1015 #ifdef CONFIG_RXKAD 1016 extern const struct rxrpc_security rxkad; 1017 #endif 1018 1019 /* 1020 * security.c 1021 */ 1022 int __init rxrpc_init_security(void); 1023 void rxrpc_exit_security(void); 1024 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1025 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1026 1027 /* 1028 * sendmsg.c 1029 */ 1030 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1031 1032 /* 1033 * skbuff.c 1034 */ 1035 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1036 void rxrpc_packet_destructor(struct sk_buff *); 1037 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1038 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1039 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1040 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1041 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1042 void rxrpc_purge_queue(struct sk_buff_head *); 1043 1044 /* 1045 * sysctl.c 1046 */ 1047 #ifdef CONFIG_SYSCTL 1048 extern int __init rxrpc_sysctl_init(void); 1049 extern void rxrpc_sysctl_exit(void); 1050 #else 1051 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1052 static inline void rxrpc_sysctl_exit(void) {} 1053 #endif 1054 1055 /* 1056 * utils.c 1057 */ 1058 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1059 struct sk_buff *); 1060 1061 static inline bool before(u32 seq1, u32 seq2) 1062 { 1063 return (s32)(seq1 - seq2) < 0; 1064 } 1065 static inline bool before_eq(u32 seq1, u32 seq2) 1066 { 1067 return (s32)(seq1 - seq2) <= 0; 1068 } 1069 static inline bool after(u32 seq1, u32 seq2) 1070 { 1071 return (s32)(seq1 - seq2) > 0; 1072 } 1073 static inline bool after_eq(u32 seq1, u32 seq2) 1074 { 1075 return (s32)(seq1 - seq2) >= 0; 1076 } 1077 1078 /* 1079 * debug tracing 1080 */ 1081 extern unsigned int rxrpc_debug; 1082 1083 #define dbgprintk(FMT,...) \ 1084 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1085 1086 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1087 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1088 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1089 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1090 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1091 1092 1093 #if defined(__KDEBUG) 1094 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1095 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1096 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1097 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1098 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1099 1100 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1101 #define RXRPC_DEBUG_KENTER 0x01 1102 #define RXRPC_DEBUG_KLEAVE 0x02 1103 #define RXRPC_DEBUG_KDEBUG 0x04 1104 #define RXRPC_DEBUG_KPROTO 0x08 1105 #define RXRPC_DEBUG_KNET 0x10 1106 1107 #define _enter(FMT,...) \ 1108 do { \ 1109 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1110 kenter(FMT,##__VA_ARGS__); \ 1111 } while (0) 1112 1113 #define _leave(FMT,...) \ 1114 do { \ 1115 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1116 kleave(FMT,##__VA_ARGS__); \ 1117 } while (0) 1118 1119 #define _debug(FMT,...) \ 1120 do { \ 1121 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1122 kdebug(FMT,##__VA_ARGS__); \ 1123 } while (0) 1124 1125 #define _proto(FMT,...) \ 1126 do { \ 1127 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1128 kproto(FMT,##__VA_ARGS__); \ 1129 } while (0) 1130 1131 #define _net(FMT,...) \ 1132 do { \ 1133 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1134 knet(FMT,##__VA_ARGS__); \ 1135 } while (0) 1136 1137 #else 1138 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1139 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1140 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1141 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1142 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1143 #endif 1144 1145 /* 1146 * debug assertion checking 1147 */ 1148 #if 1 // defined(__KDEBUGALL) 1149 1150 #define ASSERT(X) \ 1151 do { \ 1152 if (unlikely(!(X))) { \ 1153 pr_err("Assertion failed\n"); \ 1154 BUG(); \ 1155 } \ 1156 } while (0) 1157 1158 #define ASSERTCMP(X, OP, Y) \ 1159 do { \ 1160 __typeof__(X) _x = (X); \ 1161 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1162 if (unlikely(!(_x OP _y))) { \ 1163 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1164 (unsigned long)_x, (unsigned long)_x, #OP, \ 1165 (unsigned long)_y, (unsigned long)_y); \ 1166 BUG(); \ 1167 } \ 1168 } while (0) 1169 1170 #define ASSERTIF(C, X) \ 1171 do { \ 1172 if (unlikely((C) && !(X))) { \ 1173 pr_err("Assertion failed\n"); \ 1174 BUG(); \ 1175 } \ 1176 } while (0) 1177 1178 #define ASSERTIFCMP(C, X, OP, Y) \ 1179 do { \ 1180 __typeof__(X) _x = (X); \ 1181 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1182 if (unlikely((C) && !(_x OP _y))) { \ 1183 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1184 (unsigned long)_x, (unsigned long)_x, #OP, \ 1185 (unsigned long)_y, (unsigned long)_y); \ 1186 BUG(); \ 1187 } \ 1188 } while (0) 1189 1190 #else 1191 1192 #define ASSERT(X) \ 1193 do { \ 1194 } while (0) 1195 1196 #define ASSERTCMP(X, OP, Y) \ 1197 do { \ 1198 } while (0) 1199 1200 #define ASSERTIF(C, X) \ 1201 do { \ 1202 } while (0) 1203 1204 #define ASSERTIFCMP(C, X, OP, Y) \ 1205 do { \ 1206 } while (0) 1207 1208 #endif /* __KDEBUGALL */ 1209