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