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 #if 0 19 #define CHECK_SLAB_OKAY(X) \ 20 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 21 (POISON_FREE << 8 | POISON_FREE)) 22 #else 23 #define CHECK_SLAB_OKAY(X) do {} while (0) 24 #endif 25 26 #define FCRYPT_BSIZE 8 27 struct rxrpc_crypt { 28 union { 29 u8 x[FCRYPT_BSIZE]; 30 __be32 n[2]; 31 }; 32 } __attribute__((aligned(8))); 33 34 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 35 #define rxrpc_queue_delayed_work(WS,D) \ 36 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 37 38 struct key_preparsed_payload; 39 struct rxrpc_connection; 40 41 /* 42 * Mark applied to socket buffers in skb->mark. skb->priority is used 43 * to pass supplementary information. 44 */ 45 enum rxrpc_skb_mark { 46 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 47 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 48 }; 49 50 /* 51 * sk_state for RxRPC sockets 52 */ 53 enum { 54 RXRPC_UNBOUND = 0, 55 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 56 RXRPC_CLIENT_BOUND, /* client local address bound */ 57 RXRPC_SERVER_BOUND, /* server local address bound */ 58 RXRPC_SERVER_BOUND2, /* second server local address bound */ 59 RXRPC_SERVER_LISTENING, /* server listening for connections */ 60 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 61 RXRPC_CLOSE, /* socket is being closed */ 62 }; 63 64 /* 65 * Per-network namespace data. 66 */ 67 struct rxrpc_net { 68 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 69 u32 epoch; /* Local epoch for detecting local-end reset */ 70 struct list_head calls; /* List of calls active in this namespace */ 71 rwlock_t call_lock; /* Lock for ->calls */ 72 atomic_t nr_calls; /* Count of allocated calls */ 73 74 atomic_t nr_conns; 75 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 76 struct list_head service_conns; /* Service conns in this namespace */ 77 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 78 struct work_struct service_conn_reaper; 79 struct timer_list service_conn_reap_timer; 80 81 bool live; 82 83 bool kill_all_client_conns; 84 atomic_t nr_client_conns; 85 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 86 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 87 struct list_head idle_client_conns; 88 struct work_struct client_conn_reaper; 89 struct timer_list client_conn_reap_timer; 90 91 struct list_head local_endpoints; 92 struct mutex local_mutex; /* Lock for ->local_endpoints */ 93 94 DECLARE_HASHTABLE (peer_hash, 10); 95 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 96 97 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 98 u8 peer_keepalive_cursor; 99 time64_t peer_keepalive_base; 100 struct list_head peer_keepalive[32]; 101 struct list_head peer_keepalive_new; 102 struct timer_list peer_keepalive_timer; 103 struct work_struct peer_keepalive_work; 104 }; 105 106 /* 107 * Service backlog preallocation. 108 * 109 * This contains circular buffers of preallocated peers, connections and calls 110 * for incoming service calls and their head and tail pointers. This allows 111 * calls to be set up in the data_ready handler, thereby avoiding the need to 112 * shuffle packets around so much. 113 */ 114 struct rxrpc_backlog { 115 unsigned short peer_backlog_head; 116 unsigned short peer_backlog_tail; 117 unsigned short conn_backlog_head; 118 unsigned short conn_backlog_tail; 119 unsigned short call_backlog_head; 120 unsigned short call_backlog_tail; 121 #define RXRPC_BACKLOG_MAX 32 122 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 123 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 124 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 125 }; 126 127 /* 128 * RxRPC socket definition 129 */ 130 struct rxrpc_sock { 131 /* WARNING: sk has to be the first member */ 132 struct sock sk; 133 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 134 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 135 struct rxrpc_local *local; /* local endpoint */ 136 struct rxrpc_backlog *backlog; /* Preallocation for services */ 137 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 138 struct list_head sock_calls; /* List of calls owned by this socket */ 139 struct list_head to_be_accepted; /* calls awaiting acceptance */ 140 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 141 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 142 struct key *key; /* security for this socket */ 143 struct key *securities; /* list of server security descriptors */ 144 struct rb_root calls; /* User ID -> call mapping */ 145 unsigned long flags; 146 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 147 rwlock_t call_lock; /* lock for calls */ 148 u32 min_sec_level; /* minimum security level */ 149 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 150 bool exclusive; /* Exclusive connection for a client socket */ 151 u16 second_service; /* Additional service bound to the endpoint */ 152 struct { 153 /* Service upgrade information */ 154 u16 from; /* Service ID to upgrade (if not 0) */ 155 u16 to; /* service ID to upgrade to */ 156 } service_upgrade; 157 sa_family_t family; /* Protocol family created with */ 158 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 159 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 160 }; 161 162 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 163 164 /* 165 * CPU-byteorder normalised Rx packet header. 166 */ 167 struct rxrpc_host_header { 168 u32 epoch; /* client boot timestamp */ 169 u32 cid; /* connection and channel ID */ 170 u32 callNumber; /* call ID (0 for connection-level packets) */ 171 u32 seq; /* sequence number of pkt in call stream */ 172 u32 serial; /* serial number of pkt sent to network */ 173 u8 type; /* packet type */ 174 u8 flags; /* packet flags */ 175 u8 userStatus; /* app-layer defined status */ 176 u8 securityIndex; /* security protocol ID */ 177 union { 178 u16 _rsvd; /* reserved */ 179 u16 cksum; /* kerberos security checksum */ 180 }; 181 u16 serviceId; /* service ID */ 182 } __packed; 183 184 /* 185 * RxRPC socket buffer private variables 186 * - max 48 bytes (struct sk_buff::cb) 187 */ 188 struct rxrpc_skb_priv { 189 atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 190 u8 nr_subpackets; /* Number of subpackets */ 191 u8 rx_flags; /* Received packet flags */ 192 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 193 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 194 union { 195 int remain; /* amount of space remaining for next write */ 196 197 /* List of requested ACKs on subpackets */ 198 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 199 BITS_PER_LONG]; 200 }; 201 202 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 203 }; 204 205 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 206 207 /* 208 * RxRPC security module interface 209 */ 210 struct rxrpc_security { 211 const char *name; /* name of this service */ 212 u8 security_index; /* security type provided */ 213 u32 no_key_abort; /* Abort code indicating no key */ 214 215 /* Initialise a security service */ 216 int (*init)(void); 217 218 /* Clean up a security service */ 219 void (*exit)(void); 220 221 /* Parse the information from a server key */ 222 int (*preparse_server_key)(struct key_preparsed_payload *); 223 224 /* Clean up the preparse buffer after parsing a server key */ 225 void (*free_preparse_server_key)(struct key_preparsed_payload *); 226 227 /* Destroy the payload of a server key */ 228 void (*destroy_server_key)(struct key *); 229 230 /* Describe a server key */ 231 void (*describe_server_key)(const struct key *, struct seq_file *); 232 233 /* initialise a connection's security */ 234 int (*init_connection_security)(struct rxrpc_connection *, 235 struct rxrpc_key_token *); 236 237 /* Work out how much data we can store in a packet, given an estimate 238 * of the amount of data remaining. 239 */ 240 int (*how_much_data)(struct rxrpc_call *, size_t, 241 size_t *, size_t *, size_t *); 242 243 /* impose security on a packet */ 244 int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); 245 246 /* verify the security on a received packet */ 247 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 248 unsigned int, unsigned int, rxrpc_seq_t, u16); 249 250 /* Free crypto request on a call */ 251 void (*free_call_crypto)(struct rxrpc_call *); 252 253 /* Locate the data in a received packet that has been verified. */ 254 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 255 unsigned int *, unsigned int *); 256 257 /* issue a challenge */ 258 int (*issue_challenge)(struct rxrpc_connection *); 259 260 /* respond to a challenge */ 261 int (*respond_to_challenge)(struct rxrpc_connection *, 262 struct sk_buff *, 263 u32 *); 264 265 /* verify a response */ 266 int (*verify_response)(struct rxrpc_connection *, 267 struct sk_buff *, 268 u32 *); 269 270 /* clear connection security */ 271 void (*clear)(struct rxrpc_connection *); 272 }; 273 274 /* 275 * RxRPC local transport endpoint description 276 * - owned by a single AF_RXRPC socket 277 * - pointed to by transport socket struct sk_user_data 278 */ 279 struct rxrpc_local { 280 struct rcu_head rcu; 281 atomic_t active_users; /* Number of users of the local endpoint */ 282 atomic_t usage; /* Number of references to the structure */ 283 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 284 struct list_head link; 285 struct socket *socket; /* my UDP socket */ 286 struct work_struct processor; 287 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 288 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 289 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 290 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 291 struct rb_root client_bundles; /* Client connection bundles by socket params */ 292 spinlock_t client_bundles_lock; /* Lock for client_bundles */ 293 spinlock_t lock; /* access lock */ 294 rwlock_t services_lock; /* lock for services list */ 295 int debug_id; /* debug ID for printks */ 296 bool dead; 297 bool service_closed; /* Service socket closed */ 298 struct sockaddr_rxrpc srx; /* local address */ 299 }; 300 301 /* 302 * RxRPC remote transport endpoint definition 303 * - matched by local endpoint, remote port, address and protocol type 304 */ 305 struct rxrpc_peer { 306 struct rcu_head rcu; /* This must be first */ 307 atomic_t usage; 308 unsigned long hash_key; 309 struct hlist_node hash_link; 310 struct rxrpc_local *local; 311 struct hlist_head error_targets; /* targets for net error distribution */ 312 struct rb_root service_conns; /* Service connections */ 313 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 314 time64_t last_tx_at; /* Last time packet sent here */ 315 seqlock_t service_conn_lock; 316 spinlock_t lock; /* access lock */ 317 unsigned int if_mtu; /* interface MTU for this peer */ 318 unsigned int mtu; /* network MTU for this peer */ 319 unsigned int maxdata; /* data size (MTU - hdrsize) */ 320 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 321 int debug_id; /* debug ID for printks */ 322 struct sockaddr_rxrpc srx; /* remote address */ 323 324 /* calculated RTT cache */ 325 #define RXRPC_RTT_CACHE_SIZE 32 326 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 327 ktime_t rtt_last_req; /* Time of last RTT request */ 328 unsigned int rtt_count; /* Number of samples we've got */ 329 330 u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 331 u32 mdev_us; /* medium deviation */ 332 u32 mdev_max_us; /* maximal mdev for the last rtt period */ 333 u32 rttvar_us; /* smoothed mdev_max */ 334 u32 rto_j; /* Retransmission timeout in jiffies */ 335 u8 backoff; /* Backoff timeout */ 336 337 u8 cong_cwnd; /* Congestion window size */ 338 }; 339 340 /* 341 * Keys for matching a connection. 342 */ 343 struct rxrpc_conn_proto { 344 union { 345 struct { 346 u32 epoch; /* epoch of this connection */ 347 u32 cid; /* connection ID */ 348 }; 349 u64 index_key; 350 }; 351 }; 352 353 struct rxrpc_conn_parameters { 354 struct rxrpc_local *local; /* Representation of local endpoint */ 355 struct rxrpc_peer *peer; /* Remote endpoint */ 356 struct key *key; /* Security details */ 357 bool exclusive; /* T if conn is exclusive */ 358 bool upgrade; /* T if service ID can be upgraded */ 359 u16 service_id; /* Service ID for this connection */ 360 u32 security_level; /* Security level selected */ 361 }; 362 363 /* 364 * Bits in the connection flags. 365 */ 366 enum rxrpc_conn_flag { 367 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 368 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 369 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 370 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 371 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 372 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 373 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 374 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 375 }; 376 377 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 378 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 379 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 380 (1UL << RXRPC_CONN_FINAL_ACK_3)) 381 382 /* 383 * Events that can be raised upon a connection. 384 */ 385 enum rxrpc_conn_event { 386 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 387 }; 388 389 /* 390 * The connection protocol state. 391 */ 392 enum rxrpc_conn_proto_state { 393 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 394 RXRPC_CONN_CLIENT, /* Client connection */ 395 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 396 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 397 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 398 RXRPC_CONN_SERVICE, /* Service secured connection */ 399 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 400 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 401 RXRPC_CONN__NR_STATES 402 }; 403 404 /* 405 * RxRPC client connection bundle. 406 */ 407 struct rxrpc_bundle { 408 struct rxrpc_conn_parameters params; 409 atomic_t usage; 410 unsigned int debug_id; 411 bool try_upgrade; /* True if the bundle is attempting upgrade */ 412 bool alloc_conn; /* True if someone's getting a conn */ 413 short alloc_error; /* Error from last conn allocation */ 414 spinlock_t channel_lock; 415 struct rb_node local_node; /* Node in local->client_conns */ 416 struct list_head waiting_calls; /* Calls waiting for channels */ 417 unsigned long avail_chans; /* Mask of available channels */ 418 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 419 }; 420 421 /* 422 * RxRPC connection definition 423 * - matched by { local, peer, epoch, conn_id, direction } 424 * - each connection can only handle four simultaneous calls 425 */ 426 struct rxrpc_connection { 427 struct rxrpc_conn_proto proto; 428 struct rxrpc_conn_parameters params; 429 430 atomic_t usage; 431 struct rcu_head rcu; 432 struct list_head cache_link; 433 434 unsigned char act_chans; /* Mask of active channels */ 435 struct rxrpc_channel { 436 unsigned long final_ack_at; /* Time at which to issue final ACK */ 437 struct rxrpc_call __rcu *call; /* Active call */ 438 unsigned int call_debug_id; /* call->debug_id */ 439 u32 call_id; /* ID of current call */ 440 u32 call_counter; /* Call ID counter */ 441 u32 last_call; /* ID of last call */ 442 u8 last_type; /* Type of last packet */ 443 union { 444 u32 last_seq; 445 u32 last_abort; 446 }; 447 } channels[RXRPC_MAXCALLS]; 448 449 struct timer_list timer; /* Conn event timer */ 450 struct work_struct processor; /* connection event processor */ 451 struct rxrpc_bundle *bundle; /* Client connection bundle */ 452 struct rb_node service_node; /* Node in peer->service_conns */ 453 struct list_head proc_link; /* link in procfs list */ 454 struct list_head link; /* link in master connection list */ 455 struct sk_buff_head rx_queue; /* received conn-level packets */ 456 457 const struct rxrpc_security *security; /* applied security module */ 458 union { 459 struct { 460 struct crypto_sync_skcipher *cipher; /* encryption handle */ 461 struct rxrpc_crypt csum_iv; /* packet checksum base */ 462 u32 nonce; /* response re-use preventer */ 463 } rxkad; 464 }; 465 unsigned long flags; 466 unsigned long events; 467 unsigned long idle_timestamp; /* Time at which last became idle */ 468 spinlock_t state_lock; /* state-change lock */ 469 enum rxrpc_conn_proto_state state; /* current state of connection */ 470 u32 abort_code; /* Abort code of connection abort */ 471 int debug_id; /* debug ID for printks */ 472 atomic_t serial; /* packet serial number counter */ 473 unsigned int hi_serial; /* highest serial number received */ 474 u32 service_id; /* Service ID, possibly upgraded */ 475 u8 security_ix; /* security type */ 476 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 477 u8 bundle_shift; /* Index into bundle->avail_chans */ 478 short error; /* Local error code */ 479 }; 480 481 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 482 { 483 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 484 } 485 486 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 487 { 488 return !rxrpc_to_server(sp); 489 } 490 491 /* 492 * Flags in call->flags. 493 */ 494 enum rxrpc_call_flag { 495 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 496 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 497 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 498 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 499 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 500 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 501 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 502 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 503 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 504 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 505 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 506 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 507 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 508 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 509 }; 510 511 /* 512 * Events that can be raised on a call. 513 */ 514 enum rxrpc_call_event { 515 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 516 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 517 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 518 RXRPC_CALL_EV_PING, /* Ping send required */ 519 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 520 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 521 }; 522 523 /* 524 * The states that a call can be in. 525 */ 526 enum rxrpc_call_state { 527 RXRPC_CALL_UNINITIALISED, 528 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 529 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 530 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 531 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 532 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 533 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 534 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 535 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 536 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 537 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 538 RXRPC_CALL_COMPLETE, /* - call complete */ 539 NR__RXRPC_CALL_STATES 540 }; 541 542 /* 543 * Call completion condition (state == RXRPC_CALL_COMPLETE). 544 */ 545 enum rxrpc_call_completion { 546 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 547 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 548 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 549 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 550 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 551 NR__RXRPC_CALL_COMPLETIONS 552 }; 553 554 /* 555 * Call Tx congestion management modes. 556 */ 557 enum rxrpc_congest_mode { 558 RXRPC_CALL_SLOW_START, 559 RXRPC_CALL_CONGEST_AVOIDANCE, 560 RXRPC_CALL_PACKET_LOSS, 561 RXRPC_CALL_FAST_RETRANSMIT, 562 NR__RXRPC_CONGEST_MODES 563 }; 564 565 /* 566 * RxRPC call definition 567 * - matched by { connection, call_id } 568 */ 569 struct rxrpc_call { 570 struct rcu_head rcu; 571 struct rxrpc_connection *conn; /* connection carrying call */ 572 struct rxrpc_peer *peer; /* Peer record for remote address */ 573 struct rxrpc_sock __rcu *socket; /* socket responsible */ 574 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 575 const struct rxrpc_security *security; /* applied security module */ 576 struct mutex user_mutex; /* User access mutex */ 577 unsigned long ack_at; /* When deferred ACK needs to happen */ 578 unsigned long ack_lost_at; /* When ACK is figured as lost */ 579 unsigned long resend_at; /* When next resend needs to happen */ 580 unsigned long ping_at; /* When next to send a ping */ 581 unsigned long keepalive_at; /* When next to send a keepalive ping */ 582 unsigned long expect_rx_by; /* When we expect to get a packet by */ 583 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 584 unsigned long expect_term_by; /* When we expect call termination by */ 585 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 586 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 587 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 588 struct timer_list timer; /* Combined event timer */ 589 struct work_struct processor; /* Event processor */ 590 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 591 struct list_head link; /* link in master call list */ 592 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 593 struct hlist_node error_link; /* link in error distribution list */ 594 struct list_head accept_link; /* Link in rx->acceptq */ 595 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 596 struct list_head sock_link; /* Link in rx->sock_calls */ 597 struct rb_node sock_node; /* Node in rx->calls */ 598 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 599 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 600 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 601 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 602 unsigned long user_call_ID; /* user-defined call ID */ 603 unsigned long flags; 604 unsigned long events; 605 spinlock_t lock; 606 spinlock_t notify_lock; /* Kernel notification lock */ 607 rwlock_t state_lock; /* lock for state transition */ 608 u32 abort_code; /* Local/remote abort code */ 609 int error; /* Local error incurred */ 610 enum rxrpc_call_state state; /* current state of call */ 611 enum rxrpc_call_completion completion; /* Call completion condition */ 612 atomic_t usage; 613 u16 service_id; /* service ID */ 614 u8 security_ix; /* Security type */ 615 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 616 u32 call_id; /* call ID on connection */ 617 u32 cid; /* connection ID plus channel index */ 618 int debug_id; /* debug ID for printks */ 619 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 620 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 621 bool rx_pkt_last; /* Current recvmsg packet is last */ 622 623 /* Rx/Tx circular buffer, depending on phase. 624 * 625 * In the Rx phase, packets are annotated with 0 or the number of the 626 * segment of a jumbo packet each buffer refers to. There can be up to 627 * 47 segments in a maximum-size UDP packet. 628 * 629 * In the Tx phase, packets are annotated with which buffers have been 630 * acked. 631 */ 632 #define RXRPC_RXTX_BUFF_SIZE 64 633 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 634 #define RXRPC_INIT_RX_WINDOW_SIZE 63 635 struct sk_buff **rxtx_buffer; 636 u8 *rxtx_annotations; 637 #define RXRPC_TX_ANNO_ACK 0 638 #define RXRPC_TX_ANNO_UNACK 1 639 #define RXRPC_TX_ANNO_NAK 2 640 #define RXRPC_TX_ANNO_RETRANS 3 641 #define RXRPC_TX_ANNO_MASK 0x03 642 #define RXRPC_TX_ANNO_LAST 0x04 643 #define RXRPC_TX_ANNO_RESENT 0x08 644 645 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 646 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 647 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 648 * not hard-ACK'd packet follows this. 649 */ 650 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 651 u16 tx_backoff; /* Delay to insert due to Tx failure */ 652 653 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 654 * is fixed, we keep these numbers in terms of segments (ie. DATA 655 * packets) rather than bytes. 656 */ 657 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 658 u8 cong_cwnd; /* Congestion window size */ 659 u8 cong_extra; /* Extra to send for congestion management */ 660 u8 cong_ssthresh; /* Slow-start threshold */ 661 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 662 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 663 u8 cong_cumul_acks; /* Cumulative ACK count */ 664 ktime_t cong_tstamp; /* Last time cwnd was changed */ 665 666 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 667 * consumed packet follows this. 668 */ 669 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 670 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 671 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 672 u8 rx_winsize; /* Size of Rx window */ 673 u8 tx_winsize; /* Maximum size of Tx window */ 674 bool tx_phase; /* T if transmission phase, F if receive phase */ 675 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 676 677 spinlock_t input_lock; /* Lock for packet input to this call */ 678 679 /* Receive-phase ACK management (ACKs we send). */ 680 u8 ackr_reason; /* reason to ACK */ 681 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 682 rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */ 683 atomic_t ackr_nr_unacked; /* Number of unacked packets */ 684 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 685 686 /* RTT management */ 687 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 688 ktime_t rtt_sent_at[4]; /* Time packet sent */ 689 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 690 * Mask of pending samples in 8-11 */ 691 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 692 #define RXRPC_CALL_RTT_PEND_SHIFT 8 693 694 /* Transmission-phase ACK management (ACKs we've received). */ 695 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 696 rxrpc_seq_t acks_first_seq; /* first sequence number received */ 697 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 698 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 699 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 700 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 701 }; 702 703 /* 704 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 705 */ 706 struct rxrpc_ack_summary { 707 u8 ack_reason; 708 u8 nr_acks; /* Number of ACKs in packet */ 709 u8 nr_nacks; /* Number of NACKs in packet */ 710 u8 nr_new_acks; /* Number of new ACKs in packet */ 711 u8 nr_new_nacks; /* Number of new NACKs in packet */ 712 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 713 bool new_low_nack; /* T if new low NACK found */ 714 bool retrans_timeo; /* T if reTx due to timeout happened */ 715 u8 flight_size; /* Number of unreceived transmissions */ 716 /* Place to stash values for tracing */ 717 enum rxrpc_congest_mode mode:8; 718 u8 cwnd; 719 u8 ssthresh; 720 u8 dup_acks; 721 u8 cumulative_acks; 722 }; 723 724 /* 725 * sendmsg() cmsg-specified parameters. 726 */ 727 enum rxrpc_command { 728 RXRPC_CMD_SEND_DATA, /* send data message */ 729 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 730 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 731 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 732 }; 733 734 struct rxrpc_call_params { 735 s64 tx_total_len; /* Total Tx data length (if send data) */ 736 unsigned long user_call_ID; /* User's call ID */ 737 struct { 738 u32 hard; /* Maximum lifetime (sec) */ 739 u32 idle; /* Max time since last data packet (msec) */ 740 u32 normal; /* Max time since last call packet (msec) */ 741 } timeouts; 742 u8 nr_timeouts; /* Number of timeouts specified */ 743 bool kernel; /* T if kernel is making the call */ 744 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 745 }; 746 747 struct rxrpc_send_params { 748 struct rxrpc_call_params call; 749 u32 abort_code; /* Abort code to Tx (if abort) */ 750 enum rxrpc_command command : 8; /* The command to implement */ 751 bool exclusive; /* Shared or exclusive call */ 752 bool upgrade; /* If the connection is upgradeable */ 753 }; 754 755 #include <trace/events/rxrpc.h> 756 757 /* 758 * af_rxrpc.c 759 */ 760 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 761 extern struct workqueue_struct *rxrpc_workqueue; 762 763 /* 764 * call_accept.c 765 */ 766 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 767 void rxrpc_discard_prealloc(struct rxrpc_sock *); 768 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 769 struct rxrpc_sock *, 770 struct sk_buff *); 771 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 772 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 773 774 /* 775 * call_event.c 776 */ 777 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 778 enum rxrpc_propose_ack_trace); 779 void rxrpc_process_call(struct work_struct *); 780 781 void rxrpc_reduce_call_timer(struct rxrpc_call *call, 782 unsigned long expire_at, 783 unsigned long now, 784 enum rxrpc_timer_trace why); 785 786 void rxrpc_delete_call_timer(struct rxrpc_call *call); 787 788 /* 789 * call_object.c 790 */ 791 extern const char *const rxrpc_call_states[]; 792 extern const char *const rxrpc_call_completions[]; 793 extern unsigned int rxrpc_max_call_lifetime; 794 extern struct kmem_cache *rxrpc_call_jar; 795 796 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 797 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 798 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 799 struct rxrpc_conn_parameters *, 800 struct sockaddr_rxrpc *, 801 struct rxrpc_call_params *, gfp_t, 802 unsigned int); 803 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 804 struct sk_buff *); 805 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 806 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 807 bool __rxrpc_queue_call(struct rxrpc_call *); 808 bool rxrpc_queue_call(struct rxrpc_call *); 809 void rxrpc_see_call(struct rxrpc_call *); 810 bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 811 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 812 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 813 void rxrpc_cleanup_call(struct rxrpc_call *); 814 void rxrpc_destroy_all_calls(struct rxrpc_net *); 815 816 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 817 { 818 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 819 } 820 821 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 822 { 823 return !rxrpc_is_service_call(call); 824 } 825 826 /* 827 * conn_client.c 828 */ 829 extern unsigned int rxrpc_reap_client_connections; 830 extern unsigned long rxrpc_conn_idle_client_expiry; 831 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 832 extern struct idr rxrpc_client_conn_ids; 833 834 void rxrpc_destroy_client_conn_ids(void); 835 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 836 void rxrpc_put_bundle(struct rxrpc_bundle *); 837 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 838 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 839 gfp_t); 840 void rxrpc_expose_client_call(struct rxrpc_call *); 841 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 842 void rxrpc_put_client_conn(struct rxrpc_connection *); 843 void rxrpc_discard_expired_client_conns(struct work_struct *); 844 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 845 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 846 847 /* 848 * conn_event.c 849 */ 850 void rxrpc_process_connection(struct work_struct *); 851 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 852 853 /* 854 * conn_object.c 855 */ 856 extern unsigned int rxrpc_connection_expiry; 857 extern unsigned int rxrpc_closed_conn_expiry; 858 859 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 860 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 861 struct sk_buff *, 862 struct rxrpc_peer **); 863 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 864 void rxrpc_disconnect_call(struct rxrpc_call *); 865 void rxrpc_kill_connection(struct rxrpc_connection *); 866 bool rxrpc_queue_conn(struct rxrpc_connection *); 867 void rxrpc_see_connection(struct rxrpc_connection *); 868 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 869 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 870 void rxrpc_put_service_conn(struct rxrpc_connection *); 871 void rxrpc_service_connection_reaper(struct work_struct *); 872 void rxrpc_destroy_all_connections(struct rxrpc_net *); 873 874 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 875 { 876 return conn->out_clientflag; 877 } 878 879 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 880 { 881 return !rxrpc_conn_is_client(conn); 882 } 883 884 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 885 { 886 if (!conn) 887 return; 888 889 if (rxrpc_conn_is_client(conn)) 890 rxrpc_put_client_conn(conn); 891 else 892 rxrpc_put_service_conn(conn); 893 } 894 895 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 896 unsigned long expire_at) 897 { 898 timer_reduce(&conn->timer, expire_at); 899 } 900 901 /* 902 * conn_service.c 903 */ 904 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 905 struct sk_buff *); 906 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 907 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 908 const struct rxrpc_security *, struct sk_buff *); 909 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 910 911 /* 912 * input.c 913 */ 914 int rxrpc_input_packet(struct sock *, struct sk_buff *); 915 916 /* 917 * insecure.c 918 */ 919 extern const struct rxrpc_security rxrpc_no_security; 920 921 /* 922 * key.c 923 */ 924 extern struct key_type key_type_rxrpc; 925 926 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 927 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 928 u32); 929 930 /* 931 * local_event.c 932 */ 933 extern void rxrpc_process_local_events(struct rxrpc_local *); 934 935 /* 936 * local_object.c 937 */ 938 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 939 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 940 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 941 void rxrpc_put_local(struct rxrpc_local *); 942 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 943 void rxrpc_unuse_local(struct rxrpc_local *); 944 void rxrpc_queue_local(struct rxrpc_local *); 945 void rxrpc_destroy_all_locals(struct rxrpc_net *); 946 947 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 948 { 949 return atomic_dec_return(&local->active_users) == 0; 950 } 951 952 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 953 { 954 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 955 } 956 957 /* 958 * misc.c 959 */ 960 extern unsigned int rxrpc_max_backlog __read_mostly; 961 extern unsigned long rxrpc_requested_ack_delay; 962 extern unsigned long rxrpc_soft_ack_delay; 963 extern unsigned long rxrpc_idle_ack_delay; 964 extern unsigned int rxrpc_rx_window_size; 965 extern unsigned int rxrpc_rx_mtu; 966 extern unsigned int rxrpc_rx_jumbo_max; 967 968 extern const s8 rxrpc_ack_priority[]; 969 970 /* 971 * net_ns.c 972 */ 973 extern unsigned int rxrpc_net_id; 974 extern struct pernet_operations rxrpc_net_ops; 975 976 static inline struct rxrpc_net *rxrpc_net(struct net *net) 977 { 978 return net_generic(net, rxrpc_net_id); 979 } 980 981 /* 982 * output.c 983 */ 984 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 985 int rxrpc_send_abort_packet(struct rxrpc_call *); 986 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 987 void rxrpc_reject_packets(struct rxrpc_local *); 988 void rxrpc_send_keepalive(struct rxrpc_peer *); 989 990 /* 991 * peer_event.c 992 */ 993 void rxrpc_error_report(struct sock *); 994 void rxrpc_peer_keepalive_worker(struct work_struct *); 995 996 /* 997 * peer_object.c 998 */ 999 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1000 const struct sockaddr_rxrpc *); 1001 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1002 struct sockaddr_rxrpc *, gfp_t); 1003 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1004 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1005 struct rxrpc_peer *); 1006 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1007 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1008 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1009 void rxrpc_put_peer(struct rxrpc_peer *); 1010 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1011 1012 /* 1013 * proc.c 1014 */ 1015 extern const struct seq_operations rxrpc_call_seq_ops; 1016 extern const struct seq_operations rxrpc_connection_seq_ops; 1017 extern const struct seq_operations rxrpc_peer_seq_ops; 1018 1019 /* 1020 * recvmsg.c 1021 */ 1022 void rxrpc_notify_socket(struct rxrpc_call *); 1023 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1024 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1025 bool __rxrpc_call_completed(struct rxrpc_call *); 1026 bool rxrpc_call_completed(struct rxrpc_call *); 1027 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1028 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1029 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1030 1031 /* 1032 * Abort a call due to a protocol error. 1033 */ 1034 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1035 struct sk_buff *skb, 1036 const char *eproto_why, 1037 const char *why, 1038 u32 abort_code) 1039 { 1040 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1041 1042 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1043 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1044 } 1045 1046 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1047 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1048 (abort_why), (abort_code)) 1049 1050 /* 1051 * rtt.c 1052 */ 1053 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1054 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1055 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1056 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1057 1058 /* 1059 * rxkad.c 1060 */ 1061 #ifdef CONFIG_RXKAD 1062 extern const struct rxrpc_security rxkad; 1063 #endif 1064 1065 /* 1066 * security.c 1067 */ 1068 int __init rxrpc_init_security(void); 1069 const struct rxrpc_security *rxrpc_security_lookup(u8); 1070 void rxrpc_exit_security(void); 1071 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1072 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1073 struct sk_buff *); 1074 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1075 struct sk_buff *, u32, u32); 1076 1077 /* 1078 * sendmsg.c 1079 */ 1080 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1081 1082 /* 1083 * server_key.c 1084 */ 1085 extern struct key_type key_type_rxrpc_s; 1086 1087 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1088 1089 /* 1090 * skbuff.c 1091 */ 1092 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1093 void rxrpc_packet_destructor(struct sk_buff *); 1094 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1095 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1096 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1097 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1098 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1099 void rxrpc_purge_queue(struct sk_buff_head *); 1100 1101 /* 1102 * sysctl.c 1103 */ 1104 #ifdef CONFIG_SYSCTL 1105 extern int __init rxrpc_sysctl_init(void); 1106 extern void rxrpc_sysctl_exit(void); 1107 #else 1108 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1109 static inline void rxrpc_sysctl_exit(void) {} 1110 #endif 1111 1112 /* 1113 * utils.c 1114 */ 1115 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1116 1117 static inline bool before(u32 seq1, u32 seq2) 1118 { 1119 return (s32)(seq1 - seq2) < 0; 1120 } 1121 static inline bool before_eq(u32 seq1, u32 seq2) 1122 { 1123 return (s32)(seq1 - seq2) <= 0; 1124 } 1125 static inline bool after(u32 seq1, u32 seq2) 1126 { 1127 return (s32)(seq1 - seq2) > 0; 1128 } 1129 static inline bool after_eq(u32 seq1, u32 seq2) 1130 { 1131 return (s32)(seq1 - seq2) >= 0; 1132 } 1133 1134 /* 1135 * debug tracing 1136 */ 1137 extern unsigned int rxrpc_debug; 1138 1139 #define dbgprintk(FMT,...) \ 1140 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1141 1142 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1143 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1144 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1145 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1146 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1147 1148 1149 #if defined(__KDEBUG) 1150 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1151 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1152 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1153 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1154 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1155 1156 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1157 #define RXRPC_DEBUG_KENTER 0x01 1158 #define RXRPC_DEBUG_KLEAVE 0x02 1159 #define RXRPC_DEBUG_KDEBUG 0x04 1160 #define RXRPC_DEBUG_KPROTO 0x08 1161 #define RXRPC_DEBUG_KNET 0x10 1162 1163 #define _enter(FMT,...) \ 1164 do { \ 1165 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1166 kenter(FMT,##__VA_ARGS__); \ 1167 } while (0) 1168 1169 #define _leave(FMT,...) \ 1170 do { \ 1171 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1172 kleave(FMT,##__VA_ARGS__); \ 1173 } while (0) 1174 1175 #define _debug(FMT,...) \ 1176 do { \ 1177 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1178 kdebug(FMT,##__VA_ARGS__); \ 1179 } while (0) 1180 1181 #define _proto(FMT,...) \ 1182 do { \ 1183 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1184 kproto(FMT,##__VA_ARGS__); \ 1185 } while (0) 1186 1187 #define _net(FMT,...) \ 1188 do { \ 1189 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1190 knet(FMT,##__VA_ARGS__); \ 1191 } while (0) 1192 1193 #else 1194 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1195 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1196 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1197 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1198 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1199 #endif 1200 1201 /* 1202 * debug assertion checking 1203 */ 1204 #if 1 // defined(__KDEBUGALL) 1205 1206 #define ASSERT(X) \ 1207 do { \ 1208 if (unlikely(!(X))) { \ 1209 pr_err("Assertion failed\n"); \ 1210 BUG(); \ 1211 } \ 1212 } while (0) 1213 1214 #define ASSERTCMP(X, OP, Y) \ 1215 do { \ 1216 __typeof__(X) _x = (X); \ 1217 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1218 if (unlikely(!(_x OP _y))) { \ 1219 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1220 (unsigned long)_x, (unsigned long)_x, #OP, \ 1221 (unsigned long)_y, (unsigned long)_y); \ 1222 BUG(); \ 1223 } \ 1224 } while (0) 1225 1226 #define ASSERTIF(C, X) \ 1227 do { \ 1228 if (unlikely((C) && !(X))) { \ 1229 pr_err("Assertion failed\n"); \ 1230 BUG(); \ 1231 } \ 1232 } while (0) 1233 1234 #define ASSERTIFCMP(C, X, OP, Y) \ 1235 do { \ 1236 __typeof__(X) _x = (X); \ 1237 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1238 if (unlikely((C) && !(_x OP _y))) { \ 1239 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1240 (unsigned long)_x, (unsigned long)_x, #OP, \ 1241 (unsigned long)_y, (unsigned long)_y); \ 1242 BUG(); \ 1243 } \ 1244 } while (0) 1245 1246 #else 1247 1248 #define ASSERT(X) \ 1249 do { \ 1250 } while (0) 1251 1252 #define ASSERTCMP(X, OP, Y) \ 1253 do { \ 1254 } while (0) 1255 1256 #define ASSERTIF(C, X) \ 1257 do { \ 1258 } while (0) 1259 1260 #define ASSERTIFCMP(C, X, OP, Y) \ 1261 do { \ 1262 } while (0) 1263 1264 #endif /* __KDEBUGALL */ 1265