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