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