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 work_struct service_conn_reaper; 83 struct timer_list service_conn_reap_timer; 84 85 unsigned int nr_client_conns; 86 unsigned int nr_active_client_conns; 87 bool kill_all_client_conns; 88 bool live; 89 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 90 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 91 struct list_head waiting_client_conns; 92 struct list_head active_client_conns; 93 struct list_head idle_client_conns; 94 struct work_struct client_conn_reaper; 95 struct timer_list client_conn_reap_timer; 96 97 struct list_head local_endpoints; 98 struct mutex local_mutex; /* Lock for ->local_endpoints */ 99 100 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 101 DECLARE_HASHTABLE (peer_hash, 10); 102 }; 103 104 /* 105 * Service backlog preallocation. 106 * 107 * This contains circular buffers of preallocated peers, connections and calls 108 * for incoming service calls and their head and tail pointers. This allows 109 * calls to be set up in the data_ready handler, thereby avoiding the need to 110 * shuffle packets around so much. 111 */ 112 struct rxrpc_backlog { 113 unsigned short peer_backlog_head; 114 unsigned short peer_backlog_tail; 115 unsigned short conn_backlog_head; 116 unsigned short conn_backlog_tail; 117 unsigned short call_backlog_head; 118 unsigned short call_backlog_tail; 119 #define RXRPC_BACKLOG_MAX 32 120 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 121 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 122 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 123 }; 124 125 /* 126 * RxRPC socket definition 127 */ 128 struct rxrpc_sock { 129 /* WARNING: sk has to be the first member */ 130 struct sock sk; 131 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 132 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 133 struct rxrpc_local *local; /* local endpoint */ 134 struct rxrpc_backlog *backlog; /* Preallocation for services */ 135 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 136 struct list_head sock_calls; /* List of calls owned by this socket */ 137 struct list_head to_be_accepted; /* calls awaiting acceptance */ 138 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 139 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 140 struct key *key; /* security for this socket */ 141 struct key *securities; /* list of server security descriptors */ 142 struct rb_root calls; /* User ID -> call mapping */ 143 unsigned long flags; 144 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 145 rwlock_t call_lock; /* lock for calls */ 146 u32 min_sec_level; /* minimum security level */ 147 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 148 bool exclusive; /* Exclusive connection for a client socket */ 149 u16 second_service; /* Additional service bound to the endpoint */ 150 struct { 151 /* Service upgrade information */ 152 u16 from; /* Service ID to upgrade (if not 0) */ 153 u16 to; /* service ID to upgrade to */ 154 } service_upgrade; 155 sa_family_t family; /* Protocol family created with */ 156 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 157 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 158 }; 159 160 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 161 162 /* 163 * CPU-byteorder normalised Rx packet header. 164 */ 165 struct rxrpc_host_header { 166 u32 epoch; /* client boot timestamp */ 167 u32 cid; /* connection and channel ID */ 168 u32 callNumber; /* call ID (0 for connection-level packets) */ 169 u32 seq; /* sequence number of pkt in call stream */ 170 u32 serial; /* serial number of pkt sent to network */ 171 u8 type; /* packet type */ 172 u8 flags; /* packet flags */ 173 u8 userStatus; /* app-layer defined status */ 174 u8 securityIndex; /* security protocol ID */ 175 union { 176 u16 _rsvd; /* reserved */ 177 u16 cksum; /* kerberos security checksum */ 178 }; 179 u16 serviceId; /* service ID */ 180 } __packed; 181 182 /* 183 * RxRPC socket buffer private variables 184 * - max 48 bytes (struct sk_buff::cb) 185 */ 186 struct rxrpc_skb_priv { 187 union { 188 u8 nr_jumbo; /* Number of jumbo subpackets */ 189 }; 190 union { 191 int remain; /* amount of space remaining for next write */ 192 }; 193 194 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 195 }; 196 197 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 198 199 /* 200 * RxRPC security module interface 201 */ 202 struct rxrpc_security { 203 const char *name; /* name of this service */ 204 u8 security_index; /* security type provided */ 205 206 /* Initialise a security service */ 207 int (*init)(void); 208 209 /* Clean up a security service */ 210 void (*exit)(void); 211 212 /* initialise a connection's security */ 213 int (*init_connection_security)(struct rxrpc_connection *); 214 215 /* prime a connection's packet security */ 216 int (*prime_packet_security)(struct rxrpc_connection *); 217 218 /* impose security on a packet */ 219 int (*secure_packet)(struct rxrpc_call *, 220 struct sk_buff *, 221 size_t, 222 void *); 223 224 /* verify the security on a received packet */ 225 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 226 unsigned int, unsigned int, rxrpc_seq_t, u16); 227 228 /* Locate the data in a received packet that has been verified. */ 229 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 230 unsigned int *, unsigned int *); 231 232 /* issue a challenge */ 233 int (*issue_challenge)(struct rxrpc_connection *); 234 235 /* respond to a challenge */ 236 int (*respond_to_challenge)(struct rxrpc_connection *, 237 struct sk_buff *, 238 u32 *); 239 240 /* verify a response */ 241 int (*verify_response)(struct rxrpc_connection *, 242 struct sk_buff *, 243 u32 *); 244 245 /* clear connection security */ 246 void (*clear)(struct rxrpc_connection *); 247 }; 248 249 /* 250 * RxRPC local transport endpoint description 251 * - owned by a single AF_RXRPC socket 252 * - pointed to by transport socket struct sk_user_data 253 */ 254 struct rxrpc_local { 255 struct rcu_head rcu; 256 atomic_t usage; 257 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 258 struct list_head link; 259 struct socket *socket; /* my UDP socket */ 260 struct work_struct processor; 261 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 262 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 263 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 264 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 265 struct rb_root client_conns; /* Client connections by socket params */ 266 spinlock_t client_conns_lock; /* Lock for client_conns */ 267 spinlock_t lock; /* access lock */ 268 rwlock_t services_lock; /* lock for services list */ 269 int debug_id; /* debug ID for printks */ 270 bool dead; 271 bool service_closed; /* Service socket closed */ 272 struct sockaddr_rxrpc srx; /* local address */ 273 }; 274 275 /* 276 * RxRPC remote transport endpoint definition 277 * - matched by local endpoint, remote port, address and protocol type 278 */ 279 struct rxrpc_peer { 280 struct rcu_head rcu; /* This must be first */ 281 atomic_t usage; 282 unsigned long hash_key; 283 struct hlist_node hash_link; 284 struct rxrpc_local *local; 285 struct hlist_head error_targets; /* targets for net error distribution */ 286 struct work_struct error_distributor; 287 struct rb_root service_conns; /* Service connections */ 288 seqlock_t service_conn_lock; 289 spinlock_t lock; /* access lock */ 290 unsigned int if_mtu; /* interface MTU for this peer */ 291 unsigned int mtu; /* network MTU for this peer */ 292 unsigned int maxdata; /* data size (MTU - hdrsize) */ 293 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 294 int debug_id; /* debug ID for printks */ 295 int error_report; /* Net (+0) or local (+1000000) to distribute */ 296 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 297 struct sockaddr_rxrpc srx; /* remote address */ 298 299 /* calculated RTT cache */ 300 #define RXRPC_RTT_CACHE_SIZE 32 301 ktime_t rtt_last_req; /* Time of last RTT request */ 302 u64 rtt; /* Current RTT estimate (in nS) */ 303 u64 rtt_sum; /* Sum of cache contents */ 304 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 305 u8 rtt_cursor; /* next entry at which to insert */ 306 u8 rtt_usage; /* amount of cache actually used */ 307 308 u8 cong_cwnd; /* Congestion window size */ 309 }; 310 311 /* 312 * Keys for matching a connection. 313 */ 314 struct rxrpc_conn_proto { 315 union { 316 struct { 317 u32 epoch; /* epoch of this connection */ 318 u32 cid; /* connection ID */ 319 }; 320 u64 index_key; 321 }; 322 }; 323 324 struct rxrpc_conn_parameters { 325 struct rxrpc_local *local; /* Representation of local endpoint */ 326 struct rxrpc_peer *peer; /* Remote endpoint */ 327 struct key *key; /* Security details */ 328 bool exclusive; /* T if conn is exclusive */ 329 bool upgrade; /* T if service ID can be upgraded */ 330 u16 service_id; /* Service ID for this connection */ 331 u32 security_level; /* Security level selected */ 332 }; 333 334 /* 335 * Bits in the connection flags. 336 */ 337 enum rxrpc_conn_flag { 338 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 339 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 340 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 341 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 342 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 343 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 344 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 345 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 346 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 347 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 348 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 349 }; 350 351 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 352 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 353 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 354 (1UL << RXRPC_CONN_FINAL_ACK_3)) 355 356 /* 357 * Events that can be raised upon a connection. 358 */ 359 enum rxrpc_conn_event { 360 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 361 }; 362 363 /* 364 * The connection cache state. 365 */ 366 enum rxrpc_conn_cache_state { 367 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 368 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 369 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 370 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 371 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 372 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 373 RXRPC_CONN__NR_CACHE_STATES 374 }; 375 376 /* 377 * The connection protocol state. 378 */ 379 enum rxrpc_conn_proto_state { 380 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 381 RXRPC_CONN_CLIENT, /* Client connection */ 382 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 383 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 384 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 385 RXRPC_CONN_SERVICE, /* Service secured connection */ 386 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 387 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 388 RXRPC_CONN__NR_STATES 389 }; 390 391 /* 392 * RxRPC connection definition 393 * - matched by { local, peer, epoch, conn_id, direction } 394 * - each connection can only handle four simultaneous calls 395 */ 396 struct rxrpc_connection { 397 struct rxrpc_conn_proto proto; 398 struct rxrpc_conn_parameters params; 399 400 atomic_t usage; 401 struct rcu_head rcu; 402 struct list_head cache_link; 403 404 spinlock_t channel_lock; 405 unsigned char active_chans; /* Mask of active channels */ 406 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 407 struct list_head waiting_calls; /* Calls waiting for channels */ 408 struct rxrpc_channel { 409 unsigned long final_ack_at; /* Time at which to issue final ACK */ 410 struct rxrpc_call __rcu *call; /* Active call */ 411 u32 call_id; /* ID of current call */ 412 u32 call_counter; /* Call ID counter */ 413 u32 last_call; /* ID of last call */ 414 u8 last_type; /* Type of last packet */ 415 union { 416 u32 last_seq; 417 u32 last_abort; 418 }; 419 } channels[RXRPC_MAXCALLS]; 420 421 struct timer_list timer; /* Conn event timer */ 422 struct work_struct processor; /* connection event processor */ 423 union { 424 struct rb_node client_node; /* Node in local->client_conns */ 425 struct rb_node service_node; /* Node in peer->service_conns */ 426 }; 427 struct list_head proc_link; /* link in procfs list */ 428 struct list_head link; /* link in master connection list */ 429 struct sk_buff_head rx_queue; /* received conn-level packets */ 430 const struct rxrpc_security *security; /* applied security module */ 431 struct key *server_key; /* security for this service */ 432 struct crypto_skcipher *cipher; /* encryption handle */ 433 struct rxrpc_crypt csum_iv; /* packet checksum base */ 434 unsigned long flags; 435 unsigned long events; 436 unsigned long idle_timestamp; /* Time at which last became idle */ 437 spinlock_t state_lock; /* state-change lock */ 438 enum rxrpc_conn_cache_state cache_state; 439 enum rxrpc_conn_proto_state state; /* current state of connection */ 440 u32 local_abort; /* local abort code */ 441 u32 remote_abort; /* remote abort code */ 442 int debug_id; /* debug ID for printks */ 443 atomic_t serial; /* packet serial number counter */ 444 unsigned int hi_serial; /* highest serial number received */ 445 u32 security_nonce; /* response re-use preventer */ 446 u16 service_id; /* Service ID, possibly upgraded */ 447 u8 size_align; /* data size alignment (for security) */ 448 u8 security_size; /* security header size */ 449 u8 security_ix; /* security type */ 450 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 451 }; 452 453 /* 454 * Flags in call->flags. 455 */ 456 enum rxrpc_call_flag { 457 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 458 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 459 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 460 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 461 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 462 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 463 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 464 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 465 RXRPC_CALL_PINGING, /* Ping in process */ 466 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 467 }; 468 469 /* 470 * Events that can be raised on a call. 471 */ 472 enum rxrpc_call_event { 473 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 474 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 475 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 476 RXRPC_CALL_EV_PING, /* Ping send required */ 477 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 478 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 479 }; 480 481 /* 482 * The states that a call can be in. 483 */ 484 enum rxrpc_call_state { 485 RXRPC_CALL_UNINITIALISED, 486 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 487 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 488 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 489 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 490 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 491 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 492 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 493 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 494 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 495 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 496 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 497 RXRPC_CALL_COMPLETE, /* - call complete */ 498 NR__RXRPC_CALL_STATES 499 }; 500 501 /* 502 * Call Tx congestion management modes. 503 */ 504 enum rxrpc_congest_mode { 505 RXRPC_CALL_SLOW_START, 506 RXRPC_CALL_CONGEST_AVOIDANCE, 507 RXRPC_CALL_PACKET_LOSS, 508 RXRPC_CALL_FAST_RETRANSMIT, 509 NR__RXRPC_CONGEST_MODES 510 }; 511 512 /* 513 * RxRPC call definition 514 * - matched by { connection, call_id } 515 */ 516 struct rxrpc_call { 517 struct rcu_head rcu; 518 struct rxrpc_connection *conn; /* connection carrying call */ 519 struct rxrpc_peer *peer; /* Peer record for remote address */ 520 struct rxrpc_sock __rcu *socket; /* socket responsible */ 521 struct mutex user_mutex; /* User access mutex */ 522 unsigned long ack_at; /* When deferred ACK needs to happen */ 523 unsigned long ack_lost_at; /* When ACK is figured as lost */ 524 unsigned long resend_at; /* When next resend needs to happen */ 525 unsigned long ping_at; /* When next to send a ping */ 526 unsigned long keepalive_at; /* When next to send a keepalive ping */ 527 unsigned long expect_rx_by; /* When we expect to get a packet by */ 528 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 529 unsigned long expect_term_by; /* When we expect call termination by */ 530 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 531 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 532 struct timer_list timer; /* Combined event timer */ 533 struct work_struct processor; /* Event processor */ 534 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 535 struct list_head link; /* link in master call list */ 536 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 537 struct hlist_node error_link; /* link in error distribution list */ 538 struct list_head accept_link; /* Link in rx->acceptq */ 539 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 540 struct list_head sock_link; /* Link in rx->sock_calls */ 541 struct rb_node sock_node; /* Node in rx->calls */ 542 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 543 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 544 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 545 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 546 unsigned long user_call_ID; /* user-defined call ID */ 547 unsigned long flags; 548 unsigned long events; 549 spinlock_t lock; 550 spinlock_t notify_lock; /* Kernel notification lock */ 551 rwlock_t state_lock; /* lock for state transition */ 552 u32 abort_code; /* Local/remote abort code */ 553 int error; /* Local error incurred */ 554 enum rxrpc_call_state state; /* current state of call */ 555 enum rxrpc_call_completion completion; /* Call completion condition */ 556 atomic_t usage; 557 u16 service_id; /* service ID */ 558 u8 security_ix; /* Security type */ 559 u32 call_id; /* call ID on connection */ 560 u32 cid; /* connection ID plus channel index */ 561 int debug_id; /* debug ID for printks */ 562 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 563 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 564 565 /* Rx/Tx circular buffer, depending on phase. 566 * 567 * In the Rx phase, packets are annotated with 0 or the number of the 568 * segment of a jumbo packet each buffer refers to. There can be up to 569 * 47 segments in a maximum-size UDP packet. 570 * 571 * In the Tx phase, packets are annotated with which buffers have been 572 * acked. 573 */ 574 #define RXRPC_RXTX_BUFF_SIZE 64 575 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 576 #define RXRPC_INIT_RX_WINDOW_SIZE 32 577 struct sk_buff **rxtx_buffer; 578 u8 *rxtx_annotations; 579 #define RXRPC_TX_ANNO_ACK 0 580 #define RXRPC_TX_ANNO_UNACK 1 581 #define RXRPC_TX_ANNO_NAK 2 582 #define RXRPC_TX_ANNO_RETRANS 3 583 #define RXRPC_TX_ANNO_MASK 0x03 584 #define RXRPC_TX_ANNO_LAST 0x04 585 #define RXRPC_TX_ANNO_RESENT 0x08 586 587 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 588 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 589 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 590 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 591 * not hard-ACK'd packet follows this. 592 */ 593 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 594 595 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 596 * is fixed, we keep these numbers in terms of segments (ie. DATA 597 * packets) rather than bytes. 598 */ 599 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 600 u8 cong_cwnd; /* Congestion window size */ 601 u8 cong_extra; /* Extra to send for congestion management */ 602 u8 cong_ssthresh; /* Slow-start threshold */ 603 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 604 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 605 u8 cong_cumul_acks; /* Cumulative ACK count */ 606 ktime_t cong_tstamp; /* Last time cwnd was changed */ 607 608 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 609 * consumed packet follows this. 610 */ 611 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 612 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 613 u8 rx_winsize; /* Size of Rx window */ 614 u8 tx_winsize; /* Maximum size of Tx window */ 615 bool tx_phase; /* T if transmission phase, F if receive phase */ 616 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 617 618 /* receive-phase ACK management */ 619 u8 ackr_reason; /* reason to ACK */ 620 u16 ackr_skew; /* skew on packet being ACK'd */ 621 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 622 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 623 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 624 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 625 626 /* ping management */ 627 rxrpc_serial_t ping_serial; /* Last ping sent */ 628 ktime_t ping_time; /* Time last ping sent */ 629 630 /* transmission-phase ACK management */ 631 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 632 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 633 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 634 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 635 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 636 }; 637 638 /* 639 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 640 */ 641 struct rxrpc_ack_summary { 642 u8 ack_reason; 643 u8 nr_acks; /* Number of ACKs in packet */ 644 u8 nr_nacks; /* Number of NACKs in packet */ 645 u8 nr_new_acks; /* Number of new ACKs in packet */ 646 u8 nr_new_nacks; /* Number of new NACKs in packet */ 647 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 648 bool new_low_nack; /* T if new low NACK found */ 649 bool retrans_timeo; /* T if reTx due to timeout happened */ 650 u8 flight_size; /* Number of unreceived transmissions */ 651 /* Place to stash values for tracing */ 652 enum rxrpc_congest_mode mode:8; 653 u8 cwnd; 654 u8 ssthresh; 655 u8 dup_acks; 656 u8 cumulative_acks; 657 }; 658 659 /* 660 * sendmsg() cmsg-specified parameters. 661 */ 662 enum rxrpc_command { 663 RXRPC_CMD_SEND_DATA, /* send data message */ 664 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 665 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 666 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 667 }; 668 669 struct rxrpc_call_params { 670 s64 tx_total_len; /* Total Tx data length (if send data) */ 671 unsigned long user_call_ID; /* User's call ID */ 672 struct { 673 u32 hard; /* Maximum lifetime (sec) */ 674 u32 idle; /* Max time since last data packet (msec) */ 675 u32 normal; /* Max time since last call packet (msec) */ 676 } timeouts; 677 u8 nr_timeouts; /* Number of timeouts specified */ 678 }; 679 680 struct rxrpc_send_params { 681 struct rxrpc_call_params call; 682 u32 abort_code; /* Abort code to Tx (if abort) */ 683 enum rxrpc_command command : 8; /* The command to implement */ 684 bool exclusive; /* Shared or exclusive call */ 685 bool upgrade; /* If the connection is upgradeable */ 686 }; 687 688 #include <trace/events/rxrpc.h> 689 690 /* 691 * af_rxrpc.c 692 */ 693 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 694 extern atomic_t rxrpc_debug_id; 695 extern struct workqueue_struct *rxrpc_workqueue; 696 697 /* 698 * call_accept.c 699 */ 700 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 701 void rxrpc_discard_prealloc(struct rxrpc_sock *); 702 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 703 struct rxrpc_connection *, 704 struct sk_buff *); 705 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 706 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 707 rxrpc_notify_rx_t); 708 int rxrpc_reject_call(struct rxrpc_sock *); 709 710 /* 711 * call_event.c 712 */ 713 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 714 enum rxrpc_propose_ack_trace); 715 void rxrpc_process_call(struct work_struct *); 716 717 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 718 unsigned long expire_at, 719 unsigned long now, 720 enum rxrpc_timer_trace why) 721 { 722 trace_rxrpc_timer(call, why, now); 723 timer_reduce(&call->timer, expire_at); 724 } 725 726 /* 727 * call_object.c 728 */ 729 extern const char *const rxrpc_call_states[]; 730 extern const char *const rxrpc_call_completions[]; 731 extern unsigned int rxrpc_max_call_lifetime; 732 extern struct kmem_cache *rxrpc_call_jar; 733 734 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 735 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t); 736 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 737 struct rxrpc_conn_parameters *, 738 struct sockaddr_rxrpc *, 739 struct rxrpc_call_params *, gfp_t); 740 int rxrpc_retry_client_call(struct rxrpc_sock *, 741 struct rxrpc_call *, 742 struct rxrpc_conn_parameters *, 743 struct sockaddr_rxrpc *, 744 gfp_t); 745 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 746 struct sk_buff *); 747 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 748 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 749 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 750 bool __rxrpc_queue_call(struct rxrpc_call *); 751 bool rxrpc_queue_call(struct rxrpc_call *); 752 void rxrpc_see_call(struct rxrpc_call *); 753 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 754 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 755 void rxrpc_cleanup_call(struct rxrpc_call *); 756 void rxrpc_destroy_all_calls(struct rxrpc_net *); 757 758 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 759 { 760 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 761 } 762 763 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 764 { 765 return !rxrpc_is_service_call(call); 766 } 767 768 /* 769 * Transition a call to the complete state. 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 if (call->state < RXRPC_CALL_COMPLETE) { 777 call->abort_code = abort_code; 778 call->error = error; 779 call->completion = compl, 780 call->state = RXRPC_CALL_COMPLETE; 781 wake_up(&call->waitq); 782 return true; 783 } 784 return false; 785 } 786 787 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 788 enum rxrpc_call_completion compl, 789 u32 abort_code, 790 int error) 791 { 792 bool ret; 793 794 write_lock_bh(&call->state_lock); 795 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 796 write_unlock_bh(&call->state_lock); 797 return ret; 798 } 799 800 /* 801 * Record that a call successfully completed. 802 */ 803 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 804 { 805 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 806 } 807 808 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 809 { 810 bool ret; 811 812 write_lock_bh(&call->state_lock); 813 ret = __rxrpc_call_completed(call); 814 write_unlock_bh(&call->state_lock); 815 return ret; 816 } 817 818 /* 819 * Record that a call is locally aborted. 820 */ 821 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 822 rxrpc_seq_t seq, 823 u32 abort_code, int error) 824 { 825 trace_rxrpc_abort(why, call->cid, call->call_id, seq, 826 abort_code, error); 827 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 828 abort_code, error); 829 } 830 831 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 832 rxrpc_seq_t seq, u32 abort_code, int error) 833 { 834 bool ret; 835 836 write_lock_bh(&call->state_lock); 837 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 838 write_unlock_bh(&call->state_lock); 839 return ret; 840 } 841 842 /* 843 * Abort a call due to a protocol error. 844 */ 845 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 846 struct sk_buff *skb, 847 const char *eproto_why, 848 const char *why, 849 u32 abort_code) 850 { 851 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 852 853 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 854 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 855 } 856 857 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 858 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 859 (abort_why), (abort_code)) 860 861 /* 862 * conn_client.c 863 */ 864 extern unsigned int rxrpc_max_client_connections; 865 extern unsigned int rxrpc_reap_client_connections; 866 extern unsigned long rxrpc_conn_idle_client_expiry; 867 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 868 extern struct idr rxrpc_client_conn_ids; 869 870 void rxrpc_destroy_client_conn_ids(void); 871 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 872 struct sockaddr_rxrpc *, gfp_t); 873 void rxrpc_expose_client_call(struct rxrpc_call *); 874 void rxrpc_disconnect_client_call(struct rxrpc_call *); 875 void rxrpc_put_client_conn(struct rxrpc_connection *); 876 void rxrpc_discard_expired_client_conns(struct work_struct *); 877 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 878 879 /* 880 * conn_event.c 881 */ 882 void rxrpc_process_connection(struct work_struct *); 883 884 /* 885 * conn_object.c 886 */ 887 extern unsigned int rxrpc_connection_expiry; 888 extern unsigned int rxrpc_closed_conn_expiry; 889 890 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 891 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 892 struct sk_buff *); 893 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 894 void rxrpc_disconnect_call(struct rxrpc_call *); 895 void rxrpc_kill_connection(struct rxrpc_connection *); 896 bool rxrpc_queue_conn(struct rxrpc_connection *); 897 void rxrpc_see_connection(struct rxrpc_connection *); 898 void rxrpc_get_connection(struct rxrpc_connection *); 899 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 900 void rxrpc_put_service_conn(struct rxrpc_connection *); 901 void rxrpc_service_connection_reaper(struct work_struct *); 902 void rxrpc_destroy_all_connections(struct rxrpc_net *); 903 904 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 905 { 906 return conn->out_clientflag; 907 } 908 909 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 910 { 911 return !rxrpc_conn_is_client(conn); 912 } 913 914 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 915 { 916 if (!conn) 917 return; 918 919 if (rxrpc_conn_is_client(conn)) 920 rxrpc_put_client_conn(conn); 921 else 922 rxrpc_put_service_conn(conn); 923 } 924 925 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 926 unsigned long expire_at) 927 { 928 timer_reduce(&conn->timer, expire_at); 929 } 930 931 /* 932 * conn_service.c 933 */ 934 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 935 struct sk_buff *); 936 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 937 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 938 struct rxrpc_connection *, struct sk_buff *); 939 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 940 941 /* 942 * input.c 943 */ 944 void rxrpc_data_ready(struct sock *); 945 946 /* 947 * insecure.c 948 */ 949 extern const struct rxrpc_security rxrpc_no_security; 950 951 /* 952 * key.c 953 */ 954 extern struct key_type key_type_rxrpc; 955 extern struct key_type key_type_rxrpc_s; 956 957 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 958 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 959 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 960 u32); 961 962 /* 963 * local_event.c 964 */ 965 extern void rxrpc_process_local_events(struct rxrpc_local *); 966 967 /* 968 * local_object.c 969 */ 970 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 971 void __rxrpc_put_local(struct rxrpc_local *); 972 void rxrpc_destroy_all_locals(struct rxrpc_net *); 973 974 static inline void rxrpc_get_local(struct rxrpc_local *local) 975 { 976 atomic_inc(&local->usage); 977 } 978 979 static inline 980 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 981 { 982 return atomic_inc_not_zero(&local->usage) ? local : NULL; 983 } 984 985 static inline void rxrpc_put_local(struct rxrpc_local *local) 986 { 987 if (local && atomic_dec_and_test(&local->usage)) 988 __rxrpc_put_local(local); 989 } 990 991 static inline void rxrpc_queue_local(struct rxrpc_local *local) 992 { 993 rxrpc_queue_work(&local->processor); 994 } 995 996 /* 997 * misc.c 998 */ 999 extern unsigned int rxrpc_max_backlog __read_mostly; 1000 extern unsigned long rxrpc_requested_ack_delay; 1001 extern unsigned long rxrpc_soft_ack_delay; 1002 extern unsigned long rxrpc_idle_ack_delay; 1003 extern unsigned int rxrpc_rx_window_size; 1004 extern unsigned int rxrpc_rx_mtu; 1005 extern unsigned int rxrpc_rx_jumbo_max; 1006 extern unsigned long rxrpc_resend_timeout; 1007 1008 extern const s8 rxrpc_ack_priority[]; 1009 1010 /* 1011 * net_ns.c 1012 */ 1013 extern unsigned int rxrpc_net_id; 1014 extern struct pernet_operations rxrpc_net_ops; 1015 1016 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1017 { 1018 return net_generic(net, rxrpc_net_id); 1019 } 1020 1021 /* 1022 * output.c 1023 */ 1024 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1025 int rxrpc_send_abort_packet(struct rxrpc_call *); 1026 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1027 void rxrpc_reject_packets(struct rxrpc_local *); 1028 1029 /* 1030 * peer_event.c 1031 */ 1032 void rxrpc_error_report(struct sock *); 1033 void rxrpc_peer_error_distributor(struct work_struct *); 1034 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1035 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1036 1037 /* 1038 * peer_object.c 1039 */ 1040 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1041 const struct sockaddr_rxrpc *); 1042 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1043 struct sockaddr_rxrpc *, gfp_t); 1044 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1045 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1046 struct rxrpc_peer *); 1047 1048 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) 1049 { 1050 atomic_inc(&peer->usage); 1051 return peer; 1052 } 1053 1054 static inline 1055 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 1056 { 1057 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 1058 } 1059 1060 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 1061 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 1062 { 1063 if (peer && atomic_dec_and_test(&peer->usage)) 1064 __rxrpc_put_peer(peer); 1065 } 1066 1067 /* 1068 * proc.c 1069 */ 1070 extern const struct file_operations rxrpc_call_seq_fops; 1071 extern const struct file_operations rxrpc_connection_seq_fops; 1072 1073 /* 1074 * recvmsg.c 1075 */ 1076 void rxrpc_notify_socket(struct rxrpc_call *); 1077 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1078 1079 /* 1080 * rxkad.c 1081 */ 1082 #ifdef CONFIG_RXKAD 1083 extern const struct rxrpc_security rxkad; 1084 #endif 1085 1086 /* 1087 * security.c 1088 */ 1089 int __init rxrpc_init_security(void); 1090 void rxrpc_exit_security(void); 1091 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1092 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1093 1094 /* 1095 * sendmsg.c 1096 */ 1097 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1098 1099 /* 1100 * skbuff.c 1101 */ 1102 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1103 void rxrpc_packet_destructor(struct sk_buff *); 1104 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1105 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1106 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1107 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1108 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1109 void rxrpc_purge_queue(struct sk_buff_head *); 1110 1111 /* 1112 * sysctl.c 1113 */ 1114 #ifdef CONFIG_SYSCTL 1115 extern int __init rxrpc_sysctl_init(void); 1116 extern void rxrpc_sysctl_exit(void); 1117 #else 1118 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1119 static inline void rxrpc_sysctl_exit(void) {} 1120 #endif 1121 1122 /* 1123 * utils.c 1124 */ 1125 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1126 struct sk_buff *); 1127 1128 static inline bool before(u32 seq1, u32 seq2) 1129 { 1130 return (s32)(seq1 - seq2) < 0; 1131 } 1132 static inline bool before_eq(u32 seq1, u32 seq2) 1133 { 1134 return (s32)(seq1 - seq2) <= 0; 1135 } 1136 static inline bool after(u32 seq1, u32 seq2) 1137 { 1138 return (s32)(seq1 - seq2) > 0; 1139 } 1140 static inline bool after_eq(u32 seq1, u32 seq2) 1141 { 1142 return (s32)(seq1 - seq2) >= 0; 1143 } 1144 1145 /* 1146 * debug tracing 1147 */ 1148 extern unsigned int rxrpc_debug; 1149 1150 #define dbgprintk(FMT,...) \ 1151 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1152 1153 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1154 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1155 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1156 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1157 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1158 1159 1160 #if defined(__KDEBUG) 1161 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1162 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1163 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1164 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1165 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1166 1167 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1168 #define RXRPC_DEBUG_KENTER 0x01 1169 #define RXRPC_DEBUG_KLEAVE 0x02 1170 #define RXRPC_DEBUG_KDEBUG 0x04 1171 #define RXRPC_DEBUG_KPROTO 0x08 1172 #define RXRPC_DEBUG_KNET 0x10 1173 1174 #define _enter(FMT,...) \ 1175 do { \ 1176 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1177 kenter(FMT,##__VA_ARGS__); \ 1178 } while (0) 1179 1180 #define _leave(FMT,...) \ 1181 do { \ 1182 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1183 kleave(FMT,##__VA_ARGS__); \ 1184 } while (0) 1185 1186 #define _debug(FMT,...) \ 1187 do { \ 1188 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1189 kdebug(FMT,##__VA_ARGS__); \ 1190 } while (0) 1191 1192 #define _proto(FMT,...) \ 1193 do { \ 1194 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1195 kproto(FMT,##__VA_ARGS__); \ 1196 } while (0) 1197 1198 #define _net(FMT,...) \ 1199 do { \ 1200 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1201 knet(FMT,##__VA_ARGS__); \ 1202 } while (0) 1203 1204 #else 1205 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1206 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1207 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1208 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1209 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1210 #endif 1211 1212 /* 1213 * debug assertion checking 1214 */ 1215 #if 1 // defined(__KDEBUGALL) 1216 1217 #define ASSERT(X) \ 1218 do { \ 1219 if (unlikely(!(X))) { \ 1220 pr_err("Assertion failed\n"); \ 1221 BUG(); \ 1222 } \ 1223 } while (0) 1224 1225 #define ASSERTCMP(X, OP, Y) \ 1226 do { \ 1227 __typeof__(X) _x = (X); \ 1228 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1229 if (unlikely(!(_x OP _y))) { \ 1230 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1231 (unsigned long)_x, (unsigned long)_x, #OP, \ 1232 (unsigned long)_y, (unsigned long)_y); \ 1233 BUG(); \ 1234 } \ 1235 } while (0) 1236 1237 #define ASSERTIF(C, X) \ 1238 do { \ 1239 if (unlikely((C) && !(X))) { \ 1240 pr_err("Assertion failed\n"); \ 1241 BUG(); \ 1242 } \ 1243 } while (0) 1244 1245 #define ASSERTIFCMP(C, X, OP, Y) \ 1246 do { \ 1247 __typeof__(X) _x = (X); \ 1248 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1249 if (unlikely((C) && !(_x OP _y))) { \ 1250 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1251 (unsigned long)_x, (unsigned long)_x, #OP, \ 1252 (unsigned long)_y, (unsigned long)_y); \ 1253 BUG(); \ 1254 } \ 1255 } while (0) 1256 1257 #else 1258 1259 #define ASSERT(X) \ 1260 do { \ 1261 } while (0) 1262 1263 #define ASSERTCMP(X, OP, Y) \ 1264 do { \ 1265 } while (0) 1266 1267 #define ASSERTIF(C, X) \ 1268 do { \ 1269 } while (0) 1270 1271 #define ASSERTIFCMP(C, X, OP, Y) \ 1272 do { \ 1273 } while (0) 1274 1275 #endif /* __KDEBUGALL */ 1276