1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* AF_RXRPC internal definitions 3 * 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/atomic.h> 9 #include <linux/seqlock.h> 10 #include <linux/win_minmax.h> 11 #include <net/net_namespace.h> 12 #include <net/netns/generic.h> 13 #include <net/sock.h> 14 #include <net/af_rxrpc.h> 15 #include <keys/rxrpc-type.h> 16 #include "protocol.h" 17 18 #define FCRYPT_BSIZE 8 19 struct rxrpc_crypt { 20 union { 21 u8 x[FCRYPT_BSIZE]; 22 __be32 n[2]; 23 }; 24 } __attribute__((aligned(8))); 25 26 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 27 #define rxrpc_queue_delayed_work(WS,D) \ 28 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 29 30 struct key_preparsed_payload; 31 struct rxrpc_connection; 32 struct rxrpc_txbuf; 33 34 /* 35 * Mark applied to socket buffers in skb->mark. skb->priority is used 36 * to pass supplementary information. 37 */ 38 enum rxrpc_skb_mark { 39 RXRPC_SKB_MARK_PACKET, /* Received packet */ 40 RXRPC_SKB_MARK_ERROR, /* Error notification */ 41 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 42 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 43 }; 44 45 /* 46 * sk_state for RxRPC sockets 47 */ 48 enum { 49 RXRPC_UNBOUND = 0, 50 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 51 RXRPC_CLIENT_BOUND, /* client local address bound */ 52 RXRPC_SERVER_BOUND, /* server local address bound */ 53 RXRPC_SERVER_BOUND2, /* second server local address bound */ 54 RXRPC_SERVER_LISTENING, /* server listening for connections */ 55 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 56 RXRPC_CLOSE, /* socket is being closed */ 57 }; 58 59 /* 60 * Per-network namespace data. 61 */ 62 struct rxrpc_net { 63 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 64 u32 epoch; /* Local epoch for detecting local-end reset */ 65 struct list_head calls; /* List of calls active in this namespace */ 66 spinlock_t call_lock; /* Lock for ->calls */ 67 atomic_t nr_calls; /* Count of allocated calls */ 68 69 atomic_t nr_conns; 70 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 71 struct list_head service_conns; /* Service conns in this namespace */ 72 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 73 struct work_struct service_conn_reaper; 74 struct timer_list service_conn_reap_timer; 75 76 bool live; 77 78 bool kill_all_client_conns; 79 atomic_t nr_client_conns; 80 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 81 struct mutex client_conn_discard_lock; /* Prevent multiple discarders */ 82 struct list_head idle_client_conns; 83 struct work_struct client_conn_reaper; 84 struct timer_list client_conn_reap_timer; 85 86 struct hlist_head local_endpoints; 87 struct mutex local_mutex; /* Lock for ->local_endpoints */ 88 89 DECLARE_HASHTABLE (peer_hash, 10); 90 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 91 92 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 93 u8 peer_keepalive_cursor; 94 time64_t peer_keepalive_base; 95 struct list_head peer_keepalive[32]; 96 struct list_head peer_keepalive_new; 97 struct timer_list peer_keepalive_timer; 98 struct work_struct peer_keepalive_work; 99 100 atomic_t stat_tx_data; 101 atomic_t stat_tx_data_retrans; 102 atomic_t stat_tx_data_send; 103 atomic_t stat_tx_data_send_frag; 104 atomic_t stat_tx_data_send_fail; 105 atomic_t stat_tx_data_underflow; 106 atomic_t stat_tx_data_cwnd_reset; 107 atomic_t stat_rx_data; 108 atomic_t stat_rx_data_reqack; 109 atomic_t stat_rx_data_jumbo; 110 111 atomic_t stat_tx_ack_fill; 112 atomic_t stat_tx_ack_send; 113 atomic_t stat_tx_ack_skip; 114 atomic_t stat_tx_acks[256]; 115 atomic_t stat_rx_acks[256]; 116 117 atomic_t stat_why_req_ack[8]; 118 119 atomic_t stat_io_loop; 120 }; 121 122 /* 123 * Service backlog preallocation. 124 * 125 * This contains circular buffers of preallocated peers, connections and calls 126 * for incoming service calls and their head and tail pointers. This allows 127 * calls to be set up in the data_ready handler, thereby avoiding the need to 128 * shuffle packets around so much. 129 */ 130 struct rxrpc_backlog { 131 unsigned short peer_backlog_head; 132 unsigned short peer_backlog_tail; 133 unsigned short conn_backlog_head; 134 unsigned short conn_backlog_tail; 135 unsigned short call_backlog_head; 136 unsigned short call_backlog_tail; 137 #define RXRPC_BACKLOG_MAX 32 138 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 139 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 140 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 141 }; 142 143 /* 144 * RxRPC socket definition 145 */ 146 struct rxrpc_sock { 147 /* WARNING: sk has to be the first member */ 148 struct sock sk; 149 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 150 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 151 struct rxrpc_local *local; /* local endpoint */ 152 struct rxrpc_backlog *backlog; /* Preallocation for services */ 153 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 154 struct list_head sock_calls; /* List of calls owned by this socket */ 155 struct list_head to_be_accepted; /* calls awaiting acceptance */ 156 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 157 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 158 struct key *key; /* security for this socket */ 159 struct key *securities; /* list of server security descriptors */ 160 struct rb_root calls; /* User ID -> call mapping */ 161 unsigned long flags; 162 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 163 rwlock_t call_lock; /* lock for calls */ 164 u32 min_sec_level; /* minimum security level */ 165 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 166 bool exclusive; /* Exclusive connection for a client socket */ 167 u16 second_service; /* Additional service bound to the endpoint */ 168 struct { 169 /* Service upgrade information */ 170 u16 from; /* Service ID to upgrade (if not 0) */ 171 u16 to; /* service ID to upgrade to */ 172 } service_upgrade; 173 sa_family_t family; /* Protocol family created with */ 174 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 175 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 176 }; 177 178 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 179 180 /* 181 * CPU-byteorder normalised Rx packet header. 182 */ 183 struct rxrpc_host_header { 184 u32 epoch; /* client boot timestamp */ 185 u32 cid; /* connection and channel ID */ 186 u32 callNumber; /* call ID (0 for connection-level packets) */ 187 u32 seq; /* sequence number of pkt in call stream */ 188 u32 serial; /* serial number of pkt sent to network */ 189 u8 type; /* packet type */ 190 u8 flags; /* packet flags */ 191 u8 userStatus; /* app-layer defined status */ 192 u8 securityIndex; /* security protocol ID */ 193 union { 194 u16 _rsvd; /* reserved */ 195 u16 cksum; /* kerberos security checksum */ 196 }; 197 u16 serviceId; /* service ID */ 198 } __packed; 199 200 /* 201 * RxRPC socket buffer private variables 202 * - max 48 bytes (struct sk_buff::cb) 203 */ 204 struct rxrpc_skb_priv { 205 u16 offset; /* Offset of data */ 206 u16 len; /* Length of data */ 207 u8 flags; 208 #define RXRPC_RX_VERIFIED 0x01 209 210 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 211 }; 212 213 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 214 215 /* 216 * RxRPC security module interface 217 */ 218 struct rxrpc_security { 219 const char *name; /* name of this service */ 220 u8 security_index; /* security type provided */ 221 u32 no_key_abort; /* Abort code indicating no key */ 222 223 /* Initialise a security service */ 224 int (*init)(void); 225 226 /* Clean up a security service */ 227 void (*exit)(void); 228 229 /* Parse the information from a server key */ 230 int (*preparse_server_key)(struct key_preparsed_payload *); 231 232 /* Clean up the preparse buffer after parsing a server key */ 233 void (*free_preparse_server_key)(struct key_preparsed_payload *); 234 235 /* Destroy the payload of a server key */ 236 void (*destroy_server_key)(struct key *); 237 238 /* Describe a server key */ 239 void (*describe_server_key)(const struct key *, struct seq_file *); 240 241 /* initialise a connection's security */ 242 int (*init_connection_security)(struct rxrpc_connection *, 243 struct rxrpc_key_token *); 244 245 /* Work out how much data we can store in a packet, given an estimate 246 * of the amount of data remaining. 247 */ 248 int (*how_much_data)(struct rxrpc_call *, size_t, 249 size_t *, size_t *, size_t *); 250 251 /* impose security on a packet */ 252 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *); 253 254 /* verify the security on a received packet */ 255 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *); 256 257 /* Free crypto request on a call */ 258 void (*free_call_crypto)(struct rxrpc_call *); 259 260 /* issue a challenge */ 261 int (*issue_challenge)(struct rxrpc_connection *); 262 263 /* respond to a challenge */ 264 int (*respond_to_challenge)(struct rxrpc_connection *, 265 struct sk_buff *, 266 u32 *); 267 268 /* verify a response */ 269 int (*verify_response)(struct rxrpc_connection *, 270 struct sk_buff *, 271 u32 *); 272 273 /* clear connection security */ 274 void (*clear)(struct rxrpc_connection *); 275 }; 276 277 /* 278 * RxRPC local transport endpoint description 279 * - owned by a single AF_RXRPC socket 280 * - pointed to by transport socket struct sk_user_data 281 */ 282 struct rxrpc_local { 283 struct rcu_head rcu; 284 atomic_t active_users; /* Number of users of the local endpoint */ 285 refcount_t ref; /* Number of references to the structure */ 286 struct net *net; /* The network namespace */ 287 struct rxrpc_net *rxnet; /* Our bits in the network namespace */ 288 struct hlist_node link; 289 struct socket *socket; /* my UDP socket */ 290 struct task_struct *io_thread; 291 struct completion io_thread_ready; /* Indication that the I/O thread started */ 292 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 293 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 294 struct sk_buff_head rx_queue; /* Received packets */ 295 struct list_head call_attend_q; /* Calls requiring immediate attention */ 296 struct rb_root client_bundles; /* Client connection bundles by socket params */ 297 spinlock_t client_bundles_lock; /* Lock for client_bundles */ 298 spinlock_t lock; /* access lock */ 299 rwlock_t services_lock; /* lock for services list */ 300 int debug_id; /* debug ID for printks */ 301 bool dead; 302 bool service_closed; /* Service socket closed */ 303 struct sockaddr_rxrpc srx; /* local address */ 304 }; 305 306 /* 307 * RxRPC remote transport endpoint definition 308 * - matched by local endpoint, remote port, address and protocol type 309 */ 310 struct rxrpc_peer { 311 struct rcu_head rcu; /* This must be first */ 312 refcount_t ref; 313 unsigned long hash_key; 314 struct hlist_node hash_link; 315 struct rxrpc_local *local; 316 struct hlist_head error_targets; /* targets for net error distribution */ 317 struct rb_root service_conns; /* Service connections */ 318 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 319 time64_t last_tx_at; /* Last time packet sent here */ 320 seqlock_t service_conn_lock; 321 spinlock_t lock; /* access lock */ 322 unsigned int if_mtu; /* interface MTU for this peer */ 323 unsigned int mtu; /* network MTU for this peer */ 324 unsigned int maxdata; /* data size (MTU - hdrsize) */ 325 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 326 int debug_id; /* debug ID for printks */ 327 struct sockaddr_rxrpc srx; /* remote address */ 328 329 /* calculated RTT cache */ 330 #define RXRPC_RTT_CACHE_SIZE 32 331 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 332 ktime_t rtt_last_req; /* Time of last RTT request */ 333 unsigned int rtt_count; /* Number of samples we've got */ 334 335 u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 336 u32 mdev_us; /* medium deviation */ 337 u32 mdev_max_us; /* maximal mdev for the last rtt period */ 338 u32 rttvar_us; /* smoothed mdev_max */ 339 u32 rto_j; /* Retransmission timeout in jiffies */ 340 u8 backoff; /* Backoff timeout */ 341 342 u8 cong_ssthresh; /* Congestion slow-start threshold */ 343 }; 344 345 /* 346 * Keys for matching a connection. 347 */ 348 struct rxrpc_conn_proto { 349 union { 350 struct { 351 u32 epoch; /* epoch of this connection */ 352 u32 cid; /* connection ID */ 353 }; 354 u64 index_key; 355 }; 356 }; 357 358 struct rxrpc_conn_parameters { 359 struct rxrpc_local *local; /* Representation of local endpoint */ 360 struct rxrpc_peer *peer; /* Remote endpoint */ 361 struct key *key; /* Security details */ 362 bool exclusive; /* T if conn is exclusive */ 363 bool upgrade; /* T if service ID can be upgraded */ 364 u16 service_id; /* Service ID for this connection */ 365 u32 security_level; /* Security level selected */ 366 }; 367 368 /* 369 * Bits in the connection flags. 370 */ 371 enum rxrpc_conn_flag { 372 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 373 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 374 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 375 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 376 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 377 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 378 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 379 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 380 }; 381 382 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 383 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 384 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 385 (1UL << RXRPC_CONN_FINAL_ACK_3)) 386 387 /* 388 * Events that can be raised upon a connection. 389 */ 390 enum rxrpc_conn_event { 391 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 392 }; 393 394 /* 395 * The connection protocol state. 396 */ 397 enum rxrpc_conn_proto_state { 398 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 399 RXRPC_CONN_CLIENT, /* Client connection */ 400 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 401 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 402 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 403 RXRPC_CONN_SERVICE, /* Service secured connection */ 404 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 405 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 406 RXRPC_CONN__NR_STATES 407 }; 408 409 /* 410 * RxRPC client connection bundle. 411 */ 412 struct rxrpc_bundle { 413 struct rxrpc_local *local; /* Representation of local endpoint */ 414 struct rxrpc_peer *peer; /* Remote endpoint */ 415 struct key *key; /* Security details */ 416 refcount_t ref; 417 atomic_t active; /* Number of active users */ 418 unsigned int debug_id; 419 u32 security_level; /* Security level selected */ 420 u16 service_id; /* Service ID for this connection */ 421 bool try_upgrade; /* True if the bundle is attempting upgrade */ 422 bool alloc_conn; /* True if someone's getting a conn */ 423 bool exclusive; /* T if conn is exclusive */ 424 bool upgrade; /* T if service ID can be upgraded */ 425 short alloc_error; /* Error from last conn allocation */ 426 spinlock_t channel_lock; 427 struct rb_node local_node; /* Node in local->client_conns */ 428 struct list_head waiting_calls; /* Calls waiting for channels */ 429 unsigned long avail_chans; /* Mask of available channels */ 430 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 431 }; 432 433 /* 434 * RxRPC connection definition 435 * - matched by { local, peer, epoch, conn_id, direction } 436 * - each connection can only handle four simultaneous calls 437 */ 438 struct rxrpc_connection { 439 struct rxrpc_conn_proto proto; 440 struct rxrpc_local *local; /* Representation of local endpoint */ 441 struct rxrpc_peer *peer; /* Remote endpoint */ 442 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 443 struct key *key; /* Security details */ 444 445 refcount_t ref; 446 atomic_t active; /* Active count for service conns */ 447 struct rcu_head rcu; 448 struct list_head cache_link; 449 450 unsigned char act_chans; /* Mask of active channels */ 451 struct rxrpc_channel { 452 unsigned long final_ack_at; /* Time at which to issue final ACK */ 453 struct rxrpc_call __rcu *call; /* Active call */ 454 unsigned int call_debug_id; /* call->debug_id */ 455 u32 call_id; /* ID of current call */ 456 u32 call_counter; /* Call ID counter */ 457 u32 last_call; /* ID of last call */ 458 u8 last_type; /* Type of last packet */ 459 union { 460 u32 last_seq; 461 u32 last_abort; 462 }; 463 } channels[RXRPC_MAXCALLS]; 464 465 struct timer_list timer; /* Conn event timer */ 466 struct work_struct processor; /* connection event processor */ 467 struct work_struct destructor; /* In-process-context destroyer */ 468 struct rxrpc_bundle *bundle; /* Client connection bundle */ 469 struct rb_node service_node; /* Node in peer->service_conns */ 470 struct list_head proc_link; /* link in procfs list */ 471 struct list_head link; /* link in master connection list */ 472 struct sk_buff_head rx_queue; /* received conn-level packets */ 473 474 const struct rxrpc_security *security; /* applied security module */ 475 union { 476 struct { 477 struct crypto_sync_skcipher *cipher; /* encryption handle */ 478 struct rxrpc_crypt csum_iv; /* packet checksum base */ 479 u32 nonce; /* response re-use preventer */ 480 } rxkad; 481 }; 482 unsigned long flags; 483 unsigned long events; 484 unsigned long idle_timestamp; /* Time at which last became idle */ 485 spinlock_t state_lock; /* state-change lock */ 486 enum rxrpc_conn_proto_state state; /* current state of connection */ 487 u32 abort_code; /* Abort code of connection abort */ 488 int debug_id; /* debug ID for printks */ 489 atomic_t serial; /* packet serial number counter */ 490 unsigned int hi_serial; /* highest serial number received */ 491 u32 service_id; /* Service ID, possibly upgraded */ 492 u32 security_level; /* Security level selected */ 493 u8 security_ix; /* security type */ 494 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 495 u8 bundle_shift; /* Index into bundle->avail_chans */ 496 bool exclusive; /* T if conn is exclusive */ 497 bool upgrade; /* T if service ID can be upgraded */ 498 u16 orig_service_id; /* Originally requested service ID */ 499 short error; /* Local error code */ 500 }; 501 502 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 503 { 504 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 505 } 506 507 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 508 { 509 return !rxrpc_to_server(sp); 510 } 511 512 /* 513 * Flags in call->flags. 514 */ 515 enum rxrpc_call_flag { 516 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 517 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 518 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 519 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 520 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 521 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 522 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */ 523 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 524 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 525 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 526 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 527 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 528 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 529 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 530 RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */ 531 RXRPC_CALL_RX_IS_IDLE, /* Reception is idle - send an ACK */ 532 }; 533 534 /* 535 * Events that can be raised on a call. 536 */ 537 enum rxrpc_call_event { 538 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 539 RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */ 540 }; 541 542 /* 543 * The states that a call can be in. 544 */ 545 enum rxrpc_call_state { 546 RXRPC_CALL_UNINITIALISED, 547 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 548 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 549 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 550 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 551 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 552 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 553 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 554 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 555 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 556 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 557 RXRPC_CALL_COMPLETE, /* - call complete */ 558 NR__RXRPC_CALL_STATES 559 }; 560 561 /* 562 * Call completion condition (state == RXRPC_CALL_COMPLETE). 563 */ 564 enum rxrpc_call_completion { 565 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 566 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 567 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 568 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 569 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 570 NR__RXRPC_CALL_COMPLETIONS 571 }; 572 573 /* 574 * Call Tx congestion management modes. 575 */ 576 enum rxrpc_congest_mode { 577 RXRPC_CALL_SLOW_START, 578 RXRPC_CALL_CONGEST_AVOIDANCE, 579 RXRPC_CALL_PACKET_LOSS, 580 RXRPC_CALL_FAST_RETRANSMIT, 581 NR__RXRPC_CONGEST_MODES 582 }; 583 584 /* 585 * RxRPC call definition 586 * - matched by { connection, call_id } 587 */ 588 struct rxrpc_call { 589 struct rcu_head rcu; 590 struct rxrpc_connection *conn; /* connection carrying call */ 591 struct rxrpc_peer *peer; /* Peer record for remote address */ 592 struct rxrpc_local *local; /* Representation of local endpoint */ 593 struct rxrpc_sock __rcu *socket; /* socket responsible */ 594 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 595 struct key *key; /* Security details */ 596 const struct rxrpc_security *security; /* applied security module */ 597 struct mutex user_mutex; /* User access mutex */ 598 struct sockaddr_rxrpc dest_srx; /* Destination address */ 599 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ 600 unsigned long ack_lost_at; /* When ACK is figured as lost */ 601 unsigned long resend_at; /* When next resend needs to happen */ 602 unsigned long ping_at; /* When next to send a ping */ 603 unsigned long keepalive_at; /* When next to send a keepalive ping */ 604 unsigned long expect_rx_by; /* When we expect to get a packet by */ 605 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 606 unsigned long expect_term_by; /* When we expect call termination by */ 607 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 608 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 609 struct timer_list timer; /* Combined event timer */ 610 struct work_struct destroyer; /* In-process-context destroyer */ 611 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 612 struct list_head link; /* link in master call list */ 613 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 614 struct hlist_node error_link; /* link in error distribution list */ 615 struct list_head accept_link; /* Link in rx->acceptq */ 616 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 617 struct list_head sock_link; /* Link in rx->sock_calls */ 618 struct rb_node sock_node; /* Node in rx->calls */ 619 struct list_head attend_link; /* Link in local->call_attend_q */ 620 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */ 621 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 622 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 623 unsigned long user_call_ID; /* user-defined call ID */ 624 unsigned long flags; 625 unsigned long events; 626 spinlock_t notify_lock; /* Kernel notification lock */ 627 rwlock_t state_lock; /* lock for state transition */ 628 u32 abort_code; /* Local/remote abort code */ 629 int error; /* Local error incurred */ 630 enum rxrpc_call_state state; /* current state of call */ 631 enum rxrpc_call_completion completion; /* Call completion condition */ 632 refcount_t ref; 633 u8 security_ix; /* Security type */ 634 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 635 u32 call_id; /* call ID on connection */ 636 u32 cid; /* connection ID plus channel index */ 637 u32 security_level; /* Security level selected */ 638 int debug_id; /* debug ID for printks */ 639 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 640 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 641 642 /* Transmitted data tracking. */ 643 spinlock_t tx_lock; /* Transmit queue lock */ 644 struct list_head tx_sendmsg; /* Sendmsg prepared packets */ 645 struct list_head tx_buffer; /* Buffer of transmissible packets */ 646 rxrpc_seq_t tx_bottom; /* First packet in buffer */ 647 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */ 648 rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */ 649 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 650 u16 tx_backoff; /* Delay to insert due to Tx failure */ 651 u8 tx_winsize; /* Maximum size of Tx window */ 652 #define RXRPC_TX_MAX_WINDOW 128 653 ktime_t tx_last_sent; /* Last time a transmission occurred */ 654 655 /* Received data tracking */ 656 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */ 657 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */ 658 659 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */ 660 rxrpc_seq_t rx_consumed; /* Highest packet consumed */ 661 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 662 u8 rx_winsize; /* Size of Rx window */ 663 664 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 665 * is fixed, we keep these numbers in terms of segments (ie. DATA 666 * packets) rather than bytes. 667 */ 668 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 669 #define RXRPC_MIN_CWND (RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4) 670 u8 cong_cwnd; /* Congestion window size */ 671 u8 cong_extra; /* Extra to send for congestion management */ 672 u8 cong_ssthresh; /* Slow-start threshold */ 673 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 674 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 675 u8 cong_cumul_acks; /* Cumulative ACK count */ 676 ktime_t cong_tstamp; /* Last time cwnd was changed */ 677 678 /* Receive-phase ACK management (ACKs we send). */ 679 u8 ackr_reason; /* reason to ACK */ 680 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 681 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */ 682 atomic_t ackr_nr_unacked; /* Number of unacked packets */ 683 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 684 struct { 685 #define RXRPC_SACK_SIZE 256 686 /* SACK table for soft-acked packets */ 687 u8 ackr_sack_table[RXRPC_SACK_SIZE]; 688 } __aligned(8); 689 690 /* RTT management */ 691 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 692 ktime_t rtt_sent_at[4]; /* Time packet sent */ 693 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 694 * Mask of pending samples in 8-11 */ 695 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 696 #define RXRPC_CALL_RTT_PEND_SHIFT 8 697 698 /* Transmission-phase ACK management (ACKs we've received). */ 699 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 700 rxrpc_seq_t acks_first_seq; /* first sequence number received */ 701 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 702 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */ 703 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 704 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 705 }; 706 707 /* 708 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 709 */ 710 struct rxrpc_ack_summary { 711 u16 nr_acks; /* Number of ACKs in packet */ 712 u16 nr_new_acks; /* Number of new ACKs in packet */ 713 u16 nr_rot_new_acks; /* Number of rotated new ACKs */ 714 u8 ack_reason; 715 bool saw_nacks; /* Saw NACKs in packet */ 716 bool new_low_nack; /* T if new low NACK found */ 717 bool retrans_timeo; /* T if reTx due to timeout happened */ 718 u8 flight_size; /* Number of unreceived transmissions */ 719 /* Place to stash values for tracing */ 720 enum rxrpc_congest_mode mode:8; 721 u8 cwnd; 722 u8 ssthresh; 723 u8 dup_acks; 724 u8 cumulative_acks; 725 }; 726 727 /* 728 * sendmsg() cmsg-specified parameters. 729 */ 730 enum rxrpc_command { 731 RXRPC_CMD_SEND_DATA, /* send data message */ 732 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 733 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 734 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 735 }; 736 737 struct rxrpc_call_params { 738 s64 tx_total_len; /* Total Tx data length (if send data) */ 739 unsigned long user_call_ID; /* User's call ID */ 740 struct { 741 u32 hard; /* Maximum lifetime (sec) */ 742 u32 idle; /* Max time since last data packet (msec) */ 743 u32 normal; /* Max time since last call packet (msec) */ 744 } timeouts; 745 u8 nr_timeouts; /* Number of timeouts specified */ 746 bool kernel; /* T if kernel is making the call */ 747 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 748 }; 749 750 struct rxrpc_send_params { 751 struct rxrpc_call_params call; 752 u32 abort_code; /* Abort code to Tx (if abort) */ 753 enum rxrpc_command command : 8; /* The command to implement */ 754 bool exclusive; /* Shared or exclusive call */ 755 bool upgrade; /* If the connection is upgradeable */ 756 }; 757 758 /* 759 * Buffer of data to be output as a packet. 760 */ 761 struct rxrpc_txbuf { 762 struct rcu_head rcu; 763 struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */ 764 struct list_head tx_link; /* Link in live Enc queue or Tx queue */ 765 ktime_t last_sent; /* Time at which last transmitted */ 766 refcount_t ref; 767 rxrpc_seq_t seq; /* Sequence number of this packet */ 768 unsigned int call_debug_id; 769 unsigned int debug_id; 770 unsigned int len; /* Amount of data in buffer */ 771 unsigned int space; /* Remaining data space */ 772 unsigned int offset; /* Offset of fill point */ 773 unsigned long flags; 774 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */ 775 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */ 776 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ 777 struct { 778 /* The packet for encrypting and DMA'ing. We align it such 779 * that data[] aligns correctly for any crypto blocksize. 780 */ 781 u8 pad[64 - sizeof(struct rxrpc_wire_header)]; 782 struct rxrpc_wire_header wire; /* Network-ready header */ 783 union { 784 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */ 785 struct { 786 struct rxrpc_ackpacket ack; 787 u8 acks[0]; 788 }; 789 }; 790 } __aligned(64); 791 }; 792 793 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) 794 { 795 return txb->wire.flags & RXRPC_CLIENT_INITIATED; 796 } 797 798 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) 799 { 800 return !rxrpc_sending_to_server(txb); 801 } 802 803 #include <trace/events/rxrpc.h> 804 805 /* 806 * af_rxrpc.c 807 */ 808 extern atomic_t rxrpc_n_rx_skbs; 809 extern struct workqueue_struct *rxrpc_workqueue; 810 811 /* 812 * call_accept.c 813 */ 814 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 815 void rxrpc_discard_prealloc(struct rxrpc_sock *); 816 int rxrpc_new_incoming_call(struct rxrpc_local *, struct rxrpc_peer *, 817 struct rxrpc_connection *, struct sockaddr_rxrpc *, 818 struct sk_buff *); 819 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 820 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 821 822 /* 823 * call_event.c 824 */ 825 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, 826 enum rxrpc_propose_ack_trace why); 827 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); 828 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, 829 enum rxrpc_propose_ack_trace); 830 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); 831 void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb); 832 833 void rxrpc_reduce_call_timer(struct rxrpc_call *call, 834 unsigned long expire_at, 835 unsigned long now, 836 enum rxrpc_timer_trace why); 837 838 void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb); 839 840 /* 841 * call_object.c 842 */ 843 extern const char *const rxrpc_call_states[]; 844 extern const char *const rxrpc_call_completions[]; 845 extern struct kmem_cache *rxrpc_call_jar; 846 847 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what); 848 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 849 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 850 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 851 struct rxrpc_conn_parameters *, 852 struct sockaddr_rxrpc *, 853 struct rxrpc_call_params *, gfp_t, 854 unsigned int); 855 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 856 struct sk_buff *); 857 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 858 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 859 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace); 860 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 861 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 862 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 863 void rxrpc_cleanup_call(struct rxrpc_call *); 864 void rxrpc_destroy_all_calls(struct rxrpc_net *); 865 866 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 867 { 868 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 869 } 870 871 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 872 { 873 return !rxrpc_is_service_call(call); 874 } 875 876 /* 877 * conn_client.c 878 */ 879 extern unsigned int rxrpc_reap_client_connections; 880 extern unsigned long rxrpc_conn_idle_client_expiry; 881 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 882 extern struct idr rxrpc_client_conn_ids; 883 884 void rxrpc_destroy_client_conn_ids(void); 885 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); 886 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); 887 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 888 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 889 gfp_t); 890 void rxrpc_expose_client_call(struct rxrpc_call *); 891 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 892 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); 893 void rxrpc_discard_expired_client_conns(struct work_struct *); 894 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 895 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 896 897 /* 898 * conn_event.c 899 */ 900 void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, struct sk_buff *skb, 901 unsigned int channel); 902 void rxrpc_process_connection(struct work_struct *); 903 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 904 int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb); 905 906 /* 907 * conn_object.c 908 */ 909 extern unsigned int rxrpc_connection_expiry; 910 extern unsigned int rxrpc_closed_conn_expiry; 911 912 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t); 913 struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *, 914 struct sockaddr_rxrpc *, 915 struct sk_buff *); 916 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 917 void rxrpc_disconnect_call(struct rxrpc_call *); 918 void rxrpc_kill_client_conn(struct rxrpc_connection *); 919 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); 920 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); 921 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *, 922 enum rxrpc_conn_trace); 923 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *, 924 enum rxrpc_conn_trace); 925 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); 926 void rxrpc_service_connection_reaper(struct work_struct *); 927 void rxrpc_destroy_all_connections(struct rxrpc_net *); 928 929 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 930 { 931 return conn->out_clientflag; 932 } 933 934 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 935 { 936 return !rxrpc_conn_is_client(conn); 937 } 938 939 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 940 unsigned long expire_at) 941 { 942 timer_reduce(&conn->timer, expire_at); 943 } 944 945 /* 946 * conn_service.c 947 */ 948 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 949 struct sk_buff *); 950 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 951 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 952 const struct rxrpc_security *, struct sk_buff *); 953 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 954 955 /* 956 * input.c 957 */ 958 void rxrpc_congestion_degrade(struct rxrpc_call *); 959 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *); 960 void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *); 961 962 /* 963 * io_thread.c 964 */ 965 int rxrpc_encap_rcv(struct sock *, struct sk_buff *); 966 void rxrpc_error_report(struct sock *); 967 int rxrpc_io_thread(void *data); 968 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local) 969 { 970 wake_up_process(local->io_thread); 971 } 972 973 /* 974 * insecure.c 975 */ 976 extern const struct rxrpc_security rxrpc_no_security; 977 978 /* 979 * key.c 980 */ 981 extern struct key_type key_type_rxrpc; 982 983 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 984 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 985 u32); 986 987 /* 988 * local_event.c 989 */ 990 void rxrpc_send_version_request(struct rxrpc_local *local, 991 struct rxrpc_host_header *hdr, 992 struct sk_buff *skb); 993 994 /* 995 * local_object.c 996 */ 997 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 998 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace); 999 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace); 1000 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace); 1001 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace); 1002 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace); 1003 void rxrpc_destroy_local(struct rxrpc_local *local); 1004 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1005 1006 static inline bool __rxrpc_use_local(struct rxrpc_local *local, 1007 enum rxrpc_local_trace why) 1008 { 1009 int r, u; 1010 1011 r = refcount_read(&local->ref); 1012 u = atomic_fetch_add_unless(&local->active_users, 1, 0); 1013 trace_rxrpc_local(local->debug_id, why, r, u); 1014 return u != 0; 1015 } 1016 1017 static inline void rxrpc_see_local(struct rxrpc_local *local, 1018 enum rxrpc_local_trace why) 1019 { 1020 int r, u; 1021 1022 r = refcount_read(&local->ref); 1023 u = atomic_read(&local->active_users); 1024 trace_rxrpc_local(local->debug_id, why, r, u); 1025 } 1026 1027 /* 1028 * misc.c 1029 */ 1030 extern unsigned int rxrpc_max_backlog __read_mostly; 1031 extern unsigned long rxrpc_soft_ack_delay; 1032 extern unsigned long rxrpc_idle_ack_delay; 1033 extern unsigned int rxrpc_rx_window_size; 1034 extern unsigned int rxrpc_rx_mtu; 1035 extern unsigned int rxrpc_rx_jumbo_max; 1036 1037 /* 1038 * net_ns.c 1039 */ 1040 extern unsigned int rxrpc_net_id; 1041 extern struct pernet_operations rxrpc_net_ops; 1042 1043 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1044 { 1045 return net_generic(net, rxrpc_net_id); 1046 } 1047 1048 /* 1049 * output.c 1050 */ 1051 int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb); 1052 int rxrpc_send_abort_packet(struct rxrpc_call *); 1053 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *); 1054 void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb); 1055 void rxrpc_send_keepalive(struct rxrpc_peer *); 1056 void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb); 1057 1058 /* 1059 * peer_event.c 1060 */ 1061 void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *); 1062 void rxrpc_peer_keepalive_worker(struct work_struct *); 1063 1064 /* 1065 * peer_object.c 1066 */ 1067 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1068 const struct sockaddr_rxrpc *); 1069 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local, 1070 struct sockaddr_rxrpc *srx, gfp_t gfp); 1071 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t, 1072 enum rxrpc_peer_trace); 1073 void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer); 1074 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1075 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); 1076 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace); 1077 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); 1078 1079 /* 1080 * proc.c 1081 */ 1082 extern const struct seq_operations rxrpc_call_seq_ops; 1083 extern const struct seq_operations rxrpc_connection_seq_ops; 1084 extern const struct seq_operations rxrpc_peer_seq_ops; 1085 extern const struct seq_operations rxrpc_local_seq_ops; 1086 1087 /* 1088 * recvmsg.c 1089 */ 1090 void rxrpc_notify_socket(struct rxrpc_call *); 1091 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1092 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1093 bool __rxrpc_call_completed(struct rxrpc_call *); 1094 bool rxrpc_call_completed(struct rxrpc_call *); 1095 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1096 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1097 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1098 1099 /* 1100 * Abort a call due to a protocol error. 1101 */ 1102 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1103 struct sk_buff *skb, 1104 const char *eproto_why, 1105 const char *why, 1106 u32 abort_code) 1107 { 1108 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1109 1110 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1111 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1112 } 1113 1114 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1115 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1116 (abort_why), (abort_code)) 1117 1118 /* 1119 * rtt.c 1120 */ 1121 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1122 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1123 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1124 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1125 1126 /* 1127 * rxkad.c 1128 */ 1129 #ifdef CONFIG_RXKAD 1130 extern const struct rxrpc_security rxkad; 1131 #endif 1132 1133 /* 1134 * security.c 1135 */ 1136 int __init rxrpc_init_security(void); 1137 const struct rxrpc_security *rxrpc_security_lookup(u8); 1138 void rxrpc_exit_security(void); 1139 int rxrpc_init_client_call_security(struct rxrpc_call *); 1140 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1141 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1142 struct sk_buff *); 1143 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1144 struct sk_buff *, u32, u32); 1145 1146 /* 1147 * sendmsg.c 1148 */ 1149 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1150 1151 /* 1152 * server_key.c 1153 */ 1154 extern struct key_type key_type_rxrpc_s; 1155 1156 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1157 1158 /* 1159 * skbuff.c 1160 */ 1161 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1162 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1163 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1164 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1165 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1166 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1167 void rxrpc_purge_queue(struct sk_buff_head *); 1168 1169 /* 1170 * stats.c 1171 */ 1172 int rxrpc_stats_show(struct seq_file *seq, void *v); 1173 int rxrpc_stats_clear(struct file *file, char *buf, size_t size); 1174 1175 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) 1176 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) 1177 1178 /* 1179 * sysctl.c 1180 */ 1181 #ifdef CONFIG_SYSCTL 1182 extern int __init rxrpc_sysctl_init(void); 1183 extern void rxrpc_sysctl_exit(void); 1184 #else 1185 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1186 static inline void rxrpc_sysctl_exit(void) {} 1187 #endif 1188 1189 /* 1190 * txbuf.c 1191 */ 1192 extern atomic_t rxrpc_nr_txbuf; 1193 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, 1194 gfp_t gfp); 1195 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1196 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1197 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1198 1199 /* 1200 * utils.c 1201 */ 1202 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1203 1204 static inline bool before(u32 seq1, u32 seq2) 1205 { 1206 return (s32)(seq1 - seq2) < 0; 1207 } 1208 static inline bool before_eq(u32 seq1, u32 seq2) 1209 { 1210 return (s32)(seq1 - seq2) <= 0; 1211 } 1212 static inline bool after(u32 seq1, u32 seq2) 1213 { 1214 return (s32)(seq1 - seq2) > 0; 1215 } 1216 static inline bool after_eq(u32 seq1, u32 seq2) 1217 { 1218 return (s32)(seq1 - seq2) >= 0; 1219 } 1220 1221 /* 1222 * debug tracing 1223 */ 1224 extern unsigned int rxrpc_debug; 1225 1226 #define dbgprintk(FMT,...) \ 1227 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1228 1229 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1230 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1231 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1232 1233 1234 #if defined(__KDEBUG) 1235 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1236 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1237 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1238 1239 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1240 #define RXRPC_DEBUG_KENTER 0x01 1241 #define RXRPC_DEBUG_KLEAVE 0x02 1242 #define RXRPC_DEBUG_KDEBUG 0x04 1243 1244 #define _enter(FMT,...) \ 1245 do { \ 1246 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1247 kenter(FMT,##__VA_ARGS__); \ 1248 } while (0) 1249 1250 #define _leave(FMT,...) \ 1251 do { \ 1252 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1253 kleave(FMT,##__VA_ARGS__); \ 1254 } while (0) 1255 1256 #define _debug(FMT,...) \ 1257 do { \ 1258 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1259 kdebug(FMT,##__VA_ARGS__); \ 1260 } while (0) 1261 1262 #else 1263 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1264 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1265 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1266 #endif 1267 1268 /* 1269 * debug assertion checking 1270 */ 1271 #if 1 // defined(__KDEBUGALL) 1272 1273 #define ASSERT(X) \ 1274 do { \ 1275 if (unlikely(!(X))) { \ 1276 pr_err("Assertion failed\n"); \ 1277 BUG(); \ 1278 } \ 1279 } while (0) 1280 1281 #define ASSERTCMP(X, OP, Y) \ 1282 do { \ 1283 __typeof__(X) _x = (X); \ 1284 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1285 if (unlikely(!(_x OP _y))) { \ 1286 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1287 (unsigned long)_x, (unsigned long)_x, #OP, \ 1288 (unsigned long)_y, (unsigned long)_y); \ 1289 BUG(); \ 1290 } \ 1291 } while (0) 1292 1293 #define ASSERTIF(C, X) \ 1294 do { \ 1295 if (unlikely((C) && !(X))) { \ 1296 pr_err("Assertion failed\n"); \ 1297 BUG(); \ 1298 } \ 1299 } while (0) 1300 1301 #define ASSERTIFCMP(C, X, OP, Y) \ 1302 do { \ 1303 __typeof__(X) _x = (X); \ 1304 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1305 if (unlikely((C) && !(_x OP _y))) { \ 1306 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1307 (unsigned long)_x, (unsigned long)_x, #OP, \ 1308 (unsigned long)_y, (unsigned long)_y); \ 1309 BUG(); \ 1310 } \ 1311 } while (0) 1312 1313 #else 1314 1315 #define ASSERT(X) \ 1316 do { \ 1317 } while (0) 1318 1319 #define ASSERTCMP(X, OP, Y) \ 1320 do { \ 1321 } while (0) 1322 1323 #define ASSERTIF(C, X) \ 1324 do { \ 1325 } while (0) 1326 1327 #define ASSERTIFCMP(C, X, OP, Y) \ 1328 do { \ 1329 } while (0) 1330 1331 #endif /* __KDEBUGALL */ 1332