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 atomic_t nr_calls; /* Count of allocated calls */ 79 80 atomic_t nr_conns; 81 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 82 struct list_head service_conns; /* Service conns in this namespace */ 83 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 84 struct work_struct service_conn_reaper; 85 struct timer_list service_conn_reap_timer; 86 87 unsigned int nr_client_conns; 88 unsigned int nr_active_client_conns; 89 bool kill_all_client_conns; 90 bool live; 91 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 92 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 93 struct list_head waiting_client_conns; 94 struct list_head active_client_conns; 95 struct list_head idle_client_conns; 96 struct work_struct client_conn_reaper; 97 struct timer_list client_conn_reap_timer; 98 99 struct list_head local_endpoints; 100 struct mutex local_mutex; /* Lock for ->local_endpoints */ 101 102 DECLARE_HASHTABLE (peer_hash, 10); 103 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 104 105 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 106 u8 peer_keepalive_cursor; 107 time64_t peer_keepalive_base; 108 struct list_head peer_keepalive[32]; 109 struct list_head peer_keepalive_new; 110 struct timer_list peer_keepalive_timer; 111 struct work_struct peer_keepalive_work; 112 }; 113 114 /* 115 * Service backlog preallocation. 116 * 117 * This contains circular buffers of preallocated peers, connections and calls 118 * for incoming service calls and their head and tail pointers. This allows 119 * calls to be set up in the data_ready handler, thereby avoiding the need to 120 * shuffle packets around so much. 121 */ 122 struct rxrpc_backlog { 123 unsigned short peer_backlog_head; 124 unsigned short peer_backlog_tail; 125 unsigned short conn_backlog_head; 126 unsigned short conn_backlog_tail; 127 unsigned short call_backlog_head; 128 unsigned short call_backlog_tail; 129 #define RXRPC_BACKLOG_MAX 32 130 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 131 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 132 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 133 }; 134 135 /* 136 * RxRPC socket definition 137 */ 138 struct rxrpc_sock { 139 /* WARNING: sk has to be the first member */ 140 struct sock sk; 141 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 142 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 143 struct rxrpc_local *local; /* local endpoint */ 144 struct rxrpc_backlog *backlog; /* Preallocation for services */ 145 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 146 struct list_head sock_calls; /* List of calls owned by this socket */ 147 struct list_head to_be_accepted; /* calls awaiting acceptance */ 148 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 149 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 150 struct key *key; /* security for this socket */ 151 struct key *securities; /* list of server security descriptors */ 152 struct rb_root calls; /* User ID -> call mapping */ 153 unsigned long flags; 154 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 155 rwlock_t call_lock; /* lock for calls */ 156 u32 min_sec_level; /* minimum security level */ 157 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 158 bool exclusive; /* Exclusive connection for a client socket */ 159 u16 second_service; /* Additional service bound to the endpoint */ 160 struct { 161 /* Service upgrade information */ 162 u16 from; /* Service ID to upgrade (if not 0) */ 163 u16 to; /* service ID to upgrade to */ 164 } service_upgrade; 165 sa_family_t family; /* Protocol family created with */ 166 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 167 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 168 }; 169 170 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 171 172 /* 173 * CPU-byteorder normalised Rx packet header. 174 */ 175 struct rxrpc_host_header { 176 u32 epoch; /* client boot timestamp */ 177 u32 cid; /* connection and channel ID */ 178 u32 callNumber; /* call ID (0 for connection-level packets) */ 179 u32 seq; /* sequence number of pkt in call stream */ 180 u32 serial; /* serial number of pkt sent to network */ 181 u8 type; /* packet type */ 182 u8 flags; /* packet flags */ 183 u8 userStatus; /* app-layer defined status */ 184 u8 securityIndex; /* security protocol ID */ 185 union { 186 u16 _rsvd; /* reserved */ 187 u16 cksum; /* kerberos security checksum */ 188 }; 189 u16 serviceId; /* service ID */ 190 } __packed; 191 192 /* 193 * RxRPC socket buffer private variables 194 * - max 48 bytes (struct sk_buff::cb) 195 */ 196 struct rxrpc_skb_priv { 197 union { 198 u8 nr_jumbo; /* Number of jumbo subpackets */ 199 }; 200 union { 201 int remain; /* amount of space remaining for next write */ 202 }; 203 204 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 205 }; 206 207 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 208 209 /* 210 * RxRPC security module interface 211 */ 212 struct rxrpc_security { 213 const char *name; /* name of this service */ 214 u8 security_index; /* security type provided */ 215 216 /* Initialise a security service */ 217 int (*init)(void); 218 219 /* Clean up a security service */ 220 void (*exit)(void); 221 222 /* initialise a connection's security */ 223 int (*init_connection_security)(struct rxrpc_connection *); 224 225 /* prime a connection's packet security */ 226 int (*prime_packet_security)(struct rxrpc_connection *); 227 228 /* impose security on a packet */ 229 int (*secure_packet)(struct rxrpc_call *, 230 struct sk_buff *, 231 size_t, 232 void *); 233 234 /* verify the security on a received packet */ 235 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 236 unsigned int, unsigned int, rxrpc_seq_t, u16); 237 238 /* Locate the data in a received packet that has been verified. */ 239 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 240 unsigned int *, unsigned int *); 241 242 /* issue a challenge */ 243 int (*issue_challenge)(struct rxrpc_connection *); 244 245 /* respond to a challenge */ 246 int (*respond_to_challenge)(struct rxrpc_connection *, 247 struct sk_buff *, 248 u32 *); 249 250 /* verify a response */ 251 int (*verify_response)(struct rxrpc_connection *, 252 struct sk_buff *, 253 u32 *); 254 255 /* clear connection security */ 256 void (*clear)(struct rxrpc_connection *); 257 }; 258 259 /* 260 * RxRPC local transport endpoint description 261 * - owned by a single AF_RXRPC socket 262 * - pointed to by transport socket struct sk_user_data 263 */ 264 struct rxrpc_local { 265 struct rcu_head rcu; 266 atomic_t usage; 267 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 268 struct list_head link; 269 struct socket *socket; /* my UDP socket */ 270 struct work_struct processor; 271 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 272 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 273 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 274 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 275 struct rb_root client_conns; /* Client connections by socket params */ 276 spinlock_t client_conns_lock; /* Lock for client_conns */ 277 spinlock_t lock; /* access lock */ 278 rwlock_t services_lock; /* lock for services list */ 279 int debug_id; /* debug ID for printks */ 280 bool dead; 281 bool service_closed; /* Service socket closed */ 282 struct sockaddr_rxrpc srx; /* local address */ 283 }; 284 285 /* 286 * RxRPC remote transport endpoint definition 287 * - matched by local endpoint, remote port, address and protocol type 288 */ 289 struct rxrpc_peer { 290 struct rcu_head rcu; /* This must be first */ 291 atomic_t usage; 292 unsigned long hash_key; 293 struct hlist_node hash_link; 294 struct rxrpc_local *local; 295 struct hlist_head error_targets; /* targets for net error distribution */ 296 struct work_struct error_distributor; 297 struct rb_root service_conns; /* Service connections */ 298 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 299 time64_t last_tx_at; /* Last time packet sent here */ 300 seqlock_t service_conn_lock; 301 spinlock_t lock; /* access lock */ 302 unsigned int if_mtu; /* interface MTU for this peer */ 303 unsigned int mtu; /* network MTU for this peer */ 304 unsigned int maxdata; /* data size (MTU - hdrsize) */ 305 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 306 int debug_id; /* debug ID for printks */ 307 int error_report; /* Net (+0) or local (+1000000) to distribute */ 308 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 309 struct sockaddr_rxrpc srx; /* remote address */ 310 311 /* calculated RTT cache */ 312 #define RXRPC_RTT_CACHE_SIZE 32 313 ktime_t rtt_last_req; /* Time of last RTT request */ 314 u64 rtt; /* Current RTT estimate (in nS) */ 315 u64 rtt_sum; /* Sum of cache contents */ 316 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 317 u8 rtt_cursor; /* next entry at which to insert */ 318 u8 rtt_usage; /* amount of cache actually used */ 319 320 u8 cong_cwnd; /* Congestion window size */ 321 }; 322 323 /* 324 * Keys for matching a connection. 325 */ 326 struct rxrpc_conn_proto { 327 union { 328 struct { 329 u32 epoch; /* epoch of this connection */ 330 u32 cid; /* connection ID */ 331 }; 332 u64 index_key; 333 }; 334 }; 335 336 struct rxrpc_conn_parameters { 337 struct rxrpc_local *local; /* Representation of local endpoint */ 338 struct rxrpc_peer *peer; /* Remote endpoint */ 339 struct key *key; /* Security details */ 340 bool exclusive; /* T if conn is exclusive */ 341 bool upgrade; /* T if service ID can be upgraded */ 342 u16 service_id; /* Service ID for this connection */ 343 u32 security_level; /* Security level selected */ 344 }; 345 346 /* 347 * Bits in the connection flags. 348 */ 349 enum rxrpc_conn_flag { 350 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 351 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 352 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 353 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 354 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 355 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 356 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 357 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 358 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 359 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 360 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 361 }; 362 363 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 364 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 365 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 366 (1UL << RXRPC_CONN_FINAL_ACK_3)) 367 368 /* 369 * Events that can be raised upon a connection. 370 */ 371 enum rxrpc_conn_event { 372 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 373 }; 374 375 /* 376 * The connection cache state. 377 */ 378 enum rxrpc_conn_cache_state { 379 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 380 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 381 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 382 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 383 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 384 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 385 RXRPC_CONN__NR_CACHE_STATES 386 }; 387 388 /* 389 * The connection protocol state. 390 */ 391 enum rxrpc_conn_proto_state { 392 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 393 RXRPC_CONN_CLIENT, /* Client connection */ 394 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 395 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 396 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 397 RXRPC_CONN_SERVICE, /* Service secured connection */ 398 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 399 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 400 RXRPC_CONN__NR_STATES 401 }; 402 403 /* 404 * RxRPC connection definition 405 * - matched by { local, peer, epoch, conn_id, direction } 406 * - each connection can only handle four simultaneous calls 407 */ 408 struct rxrpc_connection { 409 struct rxrpc_conn_proto proto; 410 struct rxrpc_conn_parameters params; 411 412 atomic_t usage; 413 struct rcu_head rcu; 414 struct list_head cache_link; 415 416 spinlock_t channel_lock; 417 unsigned char active_chans; /* Mask of active channels */ 418 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 419 struct list_head waiting_calls; /* Calls waiting for channels */ 420 struct rxrpc_channel { 421 unsigned long final_ack_at; /* Time at which to issue final ACK */ 422 struct rxrpc_call __rcu *call; /* Active call */ 423 unsigned int call_debug_id; /* call->debug_id */ 424 u32 call_id; /* ID of current call */ 425 u32 call_counter; /* Call ID counter */ 426 u32 last_call; /* ID of last call */ 427 u8 last_type; /* Type of last packet */ 428 union { 429 u32 last_seq; 430 u32 last_abort; 431 }; 432 } channels[RXRPC_MAXCALLS]; 433 434 struct timer_list timer; /* Conn event timer */ 435 struct work_struct processor; /* connection event processor */ 436 union { 437 struct rb_node client_node; /* Node in local->client_conns */ 438 struct rb_node service_node; /* Node in peer->service_conns */ 439 }; 440 struct list_head proc_link; /* link in procfs list */ 441 struct list_head link; /* link in master connection list */ 442 struct sk_buff_head rx_queue; /* received conn-level packets */ 443 const struct rxrpc_security *security; /* applied security module */ 444 struct key *server_key; /* security for this service */ 445 struct crypto_skcipher *cipher; /* encryption handle */ 446 struct rxrpc_crypt csum_iv; /* packet checksum base */ 447 unsigned long flags; 448 unsigned long events; 449 unsigned long idle_timestamp; /* Time at which last became idle */ 450 spinlock_t state_lock; /* state-change lock */ 451 enum rxrpc_conn_cache_state cache_state; 452 enum rxrpc_conn_proto_state state; /* current state of connection */ 453 u32 local_abort; /* local abort code */ 454 u32 remote_abort; /* remote abort code */ 455 int debug_id; /* debug ID for printks */ 456 atomic_t serial; /* packet serial number counter */ 457 unsigned int hi_serial; /* highest serial number received */ 458 u32 security_nonce; /* response re-use preventer */ 459 u16 service_id; /* Service ID, possibly upgraded */ 460 u8 size_align; /* data size alignment (for security) */ 461 u8 security_size; /* security header size */ 462 u8 security_ix; /* security type */ 463 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 464 }; 465 466 /* 467 * Flags in call->flags. 468 */ 469 enum rxrpc_call_flag { 470 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 471 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 472 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 473 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 474 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 475 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 476 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 477 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 478 RXRPC_CALL_PINGING, /* Ping in process */ 479 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 480 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 481 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 482 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 483 }; 484 485 /* 486 * Events that can be raised on a call. 487 */ 488 enum rxrpc_call_event { 489 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 490 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 491 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 492 RXRPC_CALL_EV_PING, /* Ping send required */ 493 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 494 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 495 }; 496 497 /* 498 * The states that a call can be in. 499 */ 500 enum rxrpc_call_state { 501 RXRPC_CALL_UNINITIALISED, 502 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 503 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 504 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 505 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 506 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 507 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 508 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 509 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 510 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 511 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 512 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 513 RXRPC_CALL_COMPLETE, /* - call complete */ 514 NR__RXRPC_CALL_STATES 515 }; 516 517 /* 518 * Call Tx congestion management modes. 519 */ 520 enum rxrpc_congest_mode { 521 RXRPC_CALL_SLOW_START, 522 RXRPC_CALL_CONGEST_AVOIDANCE, 523 RXRPC_CALL_PACKET_LOSS, 524 RXRPC_CALL_FAST_RETRANSMIT, 525 NR__RXRPC_CONGEST_MODES 526 }; 527 528 /* 529 * RxRPC call definition 530 * - matched by { connection, call_id } 531 */ 532 struct rxrpc_call { 533 struct rcu_head rcu; 534 struct rxrpc_connection *conn; /* connection carrying call */ 535 struct rxrpc_peer *peer; /* Peer record for remote address */ 536 struct rxrpc_sock __rcu *socket; /* socket responsible */ 537 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 538 struct mutex user_mutex; /* User access mutex */ 539 unsigned long ack_at; /* When deferred ACK needs to happen */ 540 unsigned long ack_lost_at; /* When ACK is figured as lost */ 541 unsigned long resend_at; /* When next resend needs to happen */ 542 unsigned long ping_at; /* When next to send a ping */ 543 unsigned long keepalive_at; /* When next to send a keepalive ping */ 544 unsigned long expect_rx_by; /* When we expect to get a packet by */ 545 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 546 unsigned long expect_term_by; /* When we expect call termination by */ 547 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 548 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 549 struct timer_list timer; /* Combined event timer */ 550 struct work_struct processor; /* Event processor */ 551 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 552 struct list_head link; /* link in master call list */ 553 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 554 struct hlist_node error_link; /* link in error distribution list */ 555 struct list_head accept_link; /* Link in rx->acceptq */ 556 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 557 struct list_head sock_link; /* Link in rx->sock_calls */ 558 struct rb_node sock_node; /* Node in rx->calls */ 559 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 560 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 561 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 562 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 563 unsigned long user_call_ID; /* user-defined call ID */ 564 unsigned long flags; 565 unsigned long events; 566 spinlock_t lock; 567 spinlock_t notify_lock; /* Kernel notification lock */ 568 rwlock_t state_lock; /* lock for state transition */ 569 u32 abort_code; /* Local/remote abort code */ 570 int error; /* Local error incurred */ 571 enum rxrpc_call_state state; /* current state of call */ 572 enum rxrpc_call_completion completion; /* Call completion condition */ 573 atomic_t usage; 574 u16 service_id; /* service ID */ 575 u8 security_ix; /* Security type */ 576 u32 call_id; /* call ID on connection */ 577 u32 cid; /* connection ID plus channel index */ 578 int debug_id; /* debug ID for printks */ 579 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 580 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 581 582 /* Rx/Tx circular buffer, depending on phase. 583 * 584 * In the Rx phase, packets are annotated with 0 or the number of the 585 * segment of a jumbo packet each buffer refers to. There can be up to 586 * 47 segments in a maximum-size UDP packet. 587 * 588 * In the Tx phase, packets are annotated with which buffers have been 589 * acked. 590 */ 591 #define RXRPC_RXTX_BUFF_SIZE 64 592 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 593 #define RXRPC_INIT_RX_WINDOW_SIZE 63 594 struct sk_buff **rxtx_buffer; 595 u8 *rxtx_annotations; 596 #define RXRPC_TX_ANNO_ACK 0 597 #define RXRPC_TX_ANNO_UNACK 1 598 #define RXRPC_TX_ANNO_NAK 2 599 #define RXRPC_TX_ANNO_RETRANS 3 600 #define RXRPC_TX_ANNO_MASK 0x03 601 #define RXRPC_TX_ANNO_LAST 0x04 602 #define RXRPC_TX_ANNO_RESENT 0x08 603 604 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 605 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 606 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 607 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 608 * not hard-ACK'd packet follows this. 609 */ 610 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 611 612 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 613 * is fixed, we keep these numbers in terms of segments (ie. DATA 614 * packets) rather than bytes. 615 */ 616 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 617 u8 cong_cwnd; /* Congestion window size */ 618 u8 cong_extra; /* Extra to send for congestion management */ 619 u8 cong_ssthresh; /* Slow-start threshold */ 620 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 621 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 622 u8 cong_cumul_acks; /* Cumulative ACK count */ 623 ktime_t cong_tstamp; /* Last time cwnd was changed */ 624 625 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 626 * consumed packet follows this. 627 */ 628 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 629 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 630 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 631 u8 rx_winsize; /* Size of Rx window */ 632 u8 tx_winsize; /* Maximum size of Tx window */ 633 bool tx_phase; /* T if transmission phase, F if receive phase */ 634 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 635 636 /* receive-phase ACK management */ 637 u8 ackr_reason; /* reason to ACK */ 638 u16 ackr_skew; /* skew on packet being ACK'd */ 639 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 640 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 641 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 642 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 643 644 /* ping management */ 645 rxrpc_serial_t ping_serial; /* Last ping sent */ 646 ktime_t ping_time; /* Time last ping sent */ 647 648 /* transmission-phase ACK management */ 649 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 650 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 651 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 652 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 653 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 654 }; 655 656 /* 657 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 658 */ 659 struct rxrpc_ack_summary { 660 u8 ack_reason; 661 u8 nr_acks; /* Number of ACKs in packet */ 662 u8 nr_nacks; /* Number of NACKs in packet */ 663 u8 nr_new_acks; /* Number of new ACKs in packet */ 664 u8 nr_new_nacks; /* Number of new NACKs in packet */ 665 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 666 bool new_low_nack; /* T if new low NACK found */ 667 bool retrans_timeo; /* T if reTx due to timeout happened */ 668 u8 flight_size; /* Number of unreceived transmissions */ 669 /* Place to stash values for tracing */ 670 enum rxrpc_congest_mode mode:8; 671 u8 cwnd; 672 u8 ssthresh; 673 u8 dup_acks; 674 u8 cumulative_acks; 675 }; 676 677 /* 678 * sendmsg() cmsg-specified parameters. 679 */ 680 enum rxrpc_command { 681 RXRPC_CMD_SEND_DATA, /* send data message */ 682 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 683 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 684 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 685 }; 686 687 struct rxrpc_call_params { 688 s64 tx_total_len; /* Total Tx data length (if send data) */ 689 unsigned long user_call_ID; /* User's call ID */ 690 struct { 691 u32 hard; /* Maximum lifetime (sec) */ 692 u32 idle; /* Max time since last data packet (msec) */ 693 u32 normal; /* Max time since last call packet (msec) */ 694 } timeouts; 695 u8 nr_timeouts; /* Number of timeouts specified */ 696 }; 697 698 struct rxrpc_send_params { 699 struct rxrpc_call_params call; 700 u32 abort_code; /* Abort code to Tx (if abort) */ 701 enum rxrpc_command command : 8; /* The command to implement */ 702 bool exclusive; /* Shared or exclusive call */ 703 bool upgrade; /* If the connection is upgradeable */ 704 }; 705 706 #include <trace/events/rxrpc.h> 707 708 /* 709 * af_rxrpc.c 710 */ 711 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 712 extern struct workqueue_struct *rxrpc_workqueue; 713 714 /* 715 * call_accept.c 716 */ 717 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 718 void rxrpc_discard_prealloc(struct rxrpc_sock *); 719 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 720 struct rxrpc_connection *, 721 struct sk_buff *); 722 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 723 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 724 rxrpc_notify_rx_t); 725 int rxrpc_reject_call(struct rxrpc_sock *); 726 727 /* 728 * call_event.c 729 */ 730 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 731 enum rxrpc_propose_ack_trace); 732 void rxrpc_process_call(struct work_struct *); 733 734 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 735 unsigned long expire_at, 736 unsigned long now, 737 enum rxrpc_timer_trace why) 738 { 739 trace_rxrpc_timer(call, why, now); 740 timer_reduce(&call->timer, expire_at); 741 } 742 743 /* 744 * call_object.c 745 */ 746 extern const char *const rxrpc_call_states[]; 747 extern const char *const rxrpc_call_completions[]; 748 extern unsigned int rxrpc_max_call_lifetime; 749 extern struct kmem_cache *rxrpc_call_jar; 750 751 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 752 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 753 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 754 struct rxrpc_conn_parameters *, 755 struct sockaddr_rxrpc *, 756 struct rxrpc_call_params *, gfp_t, 757 unsigned int); 758 int rxrpc_retry_client_call(struct rxrpc_sock *, 759 struct rxrpc_call *, 760 struct rxrpc_conn_parameters *, 761 struct sockaddr_rxrpc *, 762 gfp_t); 763 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 764 struct sk_buff *); 765 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 766 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 767 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 768 bool __rxrpc_queue_call(struct rxrpc_call *); 769 bool rxrpc_queue_call(struct rxrpc_call *); 770 void rxrpc_see_call(struct rxrpc_call *); 771 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 772 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 773 void rxrpc_cleanup_call(struct rxrpc_call *); 774 void rxrpc_destroy_all_calls(struct rxrpc_net *); 775 776 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 777 { 778 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 779 } 780 781 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 782 { 783 return !rxrpc_is_service_call(call); 784 } 785 786 /* 787 * Transition a call to the complete state. 788 */ 789 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 790 enum rxrpc_call_completion compl, 791 u32 abort_code, 792 int error) 793 { 794 if (call->state < RXRPC_CALL_COMPLETE) { 795 call->abort_code = abort_code; 796 call->error = error; 797 call->completion = compl, 798 call->state = RXRPC_CALL_COMPLETE; 799 trace_rxrpc_call_complete(call); 800 wake_up(&call->waitq); 801 return true; 802 } 803 return false; 804 } 805 806 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 807 enum rxrpc_call_completion compl, 808 u32 abort_code, 809 int error) 810 { 811 bool ret; 812 813 write_lock_bh(&call->state_lock); 814 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 815 write_unlock_bh(&call->state_lock); 816 return ret; 817 } 818 819 /* 820 * Record that a call successfully completed. 821 */ 822 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 823 { 824 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 825 } 826 827 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 828 { 829 bool ret; 830 831 write_lock_bh(&call->state_lock); 832 ret = __rxrpc_call_completed(call); 833 write_unlock_bh(&call->state_lock); 834 return ret; 835 } 836 837 /* 838 * Record that a call is locally aborted. 839 */ 840 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 841 rxrpc_seq_t seq, 842 u32 abort_code, int error) 843 { 844 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 845 abort_code, error); 846 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 847 abort_code, error); 848 } 849 850 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 851 rxrpc_seq_t seq, u32 abort_code, int error) 852 { 853 bool ret; 854 855 write_lock_bh(&call->state_lock); 856 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 857 write_unlock_bh(&call->state_lock); 858 return ret; 859 } 860 861 /* 862 * Abort a call due to a protocol error. 863 */ 864 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 865 struct sk_buff *skb, 866 const char *eproto_why, 867 const char *why, 868 u32 abort_code) 869 { 870 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 871 872 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 873 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 874 } 875 876 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 877 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 878 (abort_why), (abort_code)) 879 880 /* 881 * conn_client.c 882 */ 883 extern unsigned int rxrpc_max_client_connections; 884 extern unsigned int rxrpc_reap_client_connections; 885 extern unsigned long rxrpc_conn_idle_client_expiry; 886 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 887 extern struct idr rxrpc_client_conn_ids; 888 889 void rxrpc_destroy_client_conn_ids(void); 890 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 891 struct sockaddr_rxrpc *, gfp_t); 892 void rxrpc_expose_client_call(struct rxrpc_call *); 893 void rxrpc_disconnect_client_call(struct rxrpc_call *); 894 void rxrpc_put_client_conn(struct rxrpc_connection *); 895 void rxrpc_discard_expired_client_conns(struct work_struct *); 896 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 897 898 /* 899 * conn_event.c 900 */ 901 void rxrpc_process_connection(struct work_struct *); 902 903 /* 904 * conn_object.c 905 */ 906 extern unsigned int rxrpc_connection_expiry; 907 extern unsigned int rxrpc_closed_conn_expiry; 908 909 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 910 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 911 struct sk_buff *); 912 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 913 void rxrpc_disconnect_call(struct rxrpc_call *); 914 void rxrpc_kill_connection(struct rxrpc_connection *); 915 bool rxrpc_queue_conn(struct rxrpc_connection *); 916 void rxrpc_see_connection(struct rxrpc_connection *); 917 void rxrpc_get_connection(struct rxrpc_connection *); 918 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 919 void rxrpc_put_service_conn(struct rxrpc_connection *); 920 void rxrpc_service_connection_reaper(struct work_struct *); 921 void rxrpc_destroy_all_connections(struct rxrpc_net *); 922 923 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 924 { 925 return conn->out_clientflag; 926 } 927 928 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 929 { 930 return !rxrpc_conn_is_client(conn); 931 } 932 933 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 934 { 935 if (!conn) 936 return; 937 938 if (rxrpc_conn_is_client(conn)) 939 rxrpc_put_client_conn(conn); 940 else 941 rxrpc_put_service_conn(conn); 942 } 943 944 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 945 unsigned long expire_at) 946 { 947 timer_reduce(&conn->timer, expire_at); 948 } 949 950 /* 951 * conn_service.c 952 */ 953 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 954 struct sk_buff *); 955 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 956 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 957 struct rxrpc_connection *, struct sk_buff *); 958 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 959 960 /* 961 * input.c 962 */ 963 void rxrpc_data_ready(struct sock *); 964 965 /* 966 * insecure.c 967 */ 968 extern const struct rxrpc_security rxrpc_no_security; 969 970 /* 971 * key.c 972 */ 973 extern struct key_type key_type_rxrpc; 974 extern struct key_type key_type_rxrpc_s; 975 976 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 977 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 978 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 979 u32); 980 981 /* 982 * local_event.c 983 */ 984 extern void rxrpc_process_local_events(struct rxrpc_local *); 985 986 /* 987 * local_object.c 988 */ 989 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 990 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 991 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 992 void rxrpc_put_local(struct rxrpc_local *); 993 void rxrpc_queue_local(struct rxrpc_local *); 994 void rxrpc_destroy_all_locals(struct rxrpc_net *); 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 void rxrpc_send_keepalive(struct rxrpc_peer *); 1029 1030 /* 1031 * peer_event.c 1032 */ 1033 void rxrpc_error_report(struct sock *); 1034 void rxrpc_peer_error_distributor(struct work_struct *); 1035 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1036 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1037 void rxrpc_peer_keepalive_worker(struct work_struct *); 1038 1039 /* 1040 * peer_object.c 1041 */ 1042 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1043 const struct sockaddr_rxrpc *); 1044 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1045 struct sockaddr_rxrpc *, gfp_t); 1046 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1047 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1048 struct rxrpc_peer *); 1049 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1050 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1051 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1052 void rxrpc_put_peer(struct rxrpc_peer *); 1053 void __rxrpc_queue_peer_error(struct rxrpc_peer *); 1054 1055 /* 1056 * proc.c 1057 */ 1058 extern const struct seq_operations rxrpc_call_seq_ops; 1059 extern const struct seq_operations rxrpc_connection_seq_ops; 1060 1061 /* 1062 * recvmsg.c 1063 */ 1064 void rxrpc_notify_socket(struct rxrpc_call *); 1065 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1066 1067 /* 1068 * rxkad.c 1069 */ 1070 #ifdef CONFIG_RXKAD 1071 extern const struct rxrpc_security rxkad; 1072 #endif 1073 1074 /* 1075 * security.c 1076 */ 1077 int __init rxrpc_init_security(void); 1078 void rxrpc_exit_security(void); 1079 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1080 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1081 1082 /* 1083 * sendmsg.c 1084 */ 1085 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1086 1087 /* 1088 * skbuff.c 1089 */ 1090 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1091 void rxrpc_packet_destructor(struct sk_buff *); 1092 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1093 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1094 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1095 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1096 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1097 void rxrpc_purge_queue(struct sk_buff_head *); 1098 1099 /* 1100 * sysctl.c 1101 */ 1102 #ifdef CONFIG_SYSCTL 1103 extern int __init rxrpc_sysctl_init(void); 1104 extern void rxrpc_sysctl_exit(void); 1105 #else 1106 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1107 static inline void rxrpc_sysctl_exit(void) {} 1108 #endif 1109 1110 /* 1111 * utils.c 1112 */ 1113 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1114 struct sk_buff *); 1115 1116 static inline bool before(u32 seq1, u32 seq2) 1117 { 1118 return (s32)(seq1 - seq2) < 0; 1119 } 1120 static inline bool before_eq(u32 seq1, u32 seq2) 1121 { 1122 return (s32)(seq1 - seq2) <= 0; 1123 } 1124 static inline bool after(u32 seq1, u32 seq2) 1125 { 1126 return (s32)(seq1 - seq2) > 0; 1127 } 1128 static inline bool after_eq(u32 seq1, u32 seq2) 1129 { 1130 return (s32)(seq1 - seq2) >= 0; 1131 } 1132 1133 /* 1134 * debug tracing 1135 */ 1136 extern unsigned int rxrpc_debug; 1137 1138 #define dbgprintk(FMT,...) \ 1139 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1140 1141 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1142 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1143 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1144 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1145 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1146 1147 1148 #if defined(__KDEBUG) 1149 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1150 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1151 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1152 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1153 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1154 1155 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1156 #define RXRPC_DEBUG_KENTER 0x01 1157 #define RXRPC_DEBUG_KLEAVE 0x02 1158 #define RXRPC_DEBUG_KDEBUG 0x04 1159 #define RXRPC_DEBUG_KPROTO 0x08 1160 #define RXRPC_DEBUG_KNET 0x10 1161 1162 #define _enter(FMT,...) \ 1163 do { \ 1164 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1165 kenter(FMT,##__VA_ARGS__); \ 1166 } while (0) 1167 1168 #define _leave(FMT,...) \ 1169 do { \ 1170 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1171 kleave(FMT,##__VA_ARGS__); \ 1172 } while (0) 1173 1174 #define _debug(FMT,...) \ 1175 do { \ 1176 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1177 kdebug(FMT,##__VA_ARGS__); \ 1178 } while (0) 1179 1180 #define _proto(FMT,...) \ 1181 do { \ 1182 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1183 kproto(FMT,##__VA_ARGS__); \ 1184 } while (0) 1185 1186 #define _net(FMT,...) \ 1187 do { \ 1188 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1189 knet(FMT,##__VA_ARGS__); \ 1190 } while (0) 1191 1192 #else 1193 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1194 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1195 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1196 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1197 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1198 #endif 1199 1200 /* 1201 * debug assertion checking 1202 */ 1203 #if 1 // defined(__KDEBUGALL) 1204 1205 #define ASSERT(X) \ 1206 do { \ 1207 if (unlikely(!(X))) { \ 1208 pr_err("Assertion failed\n"); \ 1209 BUG(); \ 1210 } \ 1211 } while (0) 1212 1213 #define ASSERTCMP(X, OP, Y) \ 1214 do { \ 1215 __typeof__(X) _x = (X); \ 1216 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1217 if (unlikely(!(_x OP _y))) { \ 1218 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1219 (unsigned long)_x, (unsigned long)_x, #OP, \ 1220 (unsigned long)_y, (unsigned long)_y); \ 1221 BUG(); \ 1222 } \ 1223 } while (0) 1224 1225 #define ASSERTIF(C, X) \ 1226 do { \ 1227 if (unlikely((C) && !(X))) { \ 1228 pr_err("Assertion failed\n"); \ 1229 BUG(); \ 1230 } \ 1231 } while (0) 1232 1233 #define ASSERTIFCMP(C, X, OP, Y) \ 1234 do { \ 1235 __typeof__(X) _x = (X); \ 1236 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1237 if (unlikely((C) && !(_x OP _y))) { \ 1238 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1239 (unsigned long)_x, (unsigned long)_x, #OP, \ 1240 (unsigned long)_y, (unsigned long)_y); \ 1241 BUG(); \ 1242 } \ 1243 } while (0) 1244 1245 #else 1246 1247 #define ASSERT(X) \ 1248 do { \ 1249 } while (0) 1250 1251 #define ASSERTCMP(X, OP, Y) \ 1252 do { \ 1253 } while (0) 1254 1255 #define ASSERTIF(C, X) \ 1256 do { \ 1257 } while (0) 1258 1259 #define ASSERTIFCMP(C, X, OP, Y) \ 1260 do { \ 1261 } while (0) 1262 1263 #endif /* __KDEBUGALL */ 1264