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_conn_parameters params; 407 refcount_t ref; 408 unsigned int debug_id; 409 bool try_upgrade; /* True if the bundle is attempting upgrade */ 410 bool alloc_conn; /* True if someone's getting a conn */ 411 short alloc_error; /* Error from last conn allocation */ 412 spinlock_t channel_lock; 413 struct rb_node local_node; /* Node in local->client_conns */ 414 struct list_head waiting_calls; /* Calls waiting for channels */ 415 unsigned long avail_chans; /* Mask of available channels */ 416 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 417 }; 418 419 /* 420 * RxRPC connection definition 421 * - matched by { local, peer, epoch, conn_id, direction } 422 * - each connection can only handle four simultaneous calls 423 */ 424 struct rxrpc_connection { 425 struct rxrpc_conn_proto proto; 426 struct rxrpc_conn_parameters params; 427 428 refcount_t ref; 429 struct rcu_head rcu; 430 struct list_head cache_link; 431 432 unsigned char act_chans; /* Mask of active channels */ 433 struct rxrpc_channel { 434 unsigned long final_ack_at; /* Time at which to issue final ACK */ 435 struct rxrpc_call __rcu *call; /* Active call */ 436 unsigned int call_debug_id; /* call->debug_id */ 437 u32 call_id; /* ID of current call */ 438 u32 call_counter; /* Call ID counter */ 439 u32 last_call; /* ID of last call */ 440 u8 last_type; /* Type of last packet */ 441 union { 442 u32 last_seq; 443 u32 last_abort; 444 }; 445 } channels[RXRPC_MAXCALLS]; 446 447 struct timer_list timer; /* Conn event timer */ 448 struct work_struct processor; /* connection event processor */ 449 struct rxrpc_bundle *bundle; /* Client connection bundle */ 450 struct rb_node service_node; /* Node in peer->service_conns */ 451 struct list_head proc_link; /* link in procfs list */ 452 struct list_head link; /* link in master connection list */ 453 struct sk_buff_head rx_queue; /* received conn-level packets */ 454 455 const struct rxrpc_security *security; /* applied security module */ 456 union { 457 struct { 458 struct crypto_sync_skcipher *cipher; /* encryption handle */ 459 struct rxrpc_crypt csum_iv; /* packet checksum base */ 460 u32 nonce; /* response re-use preventer */ 461 } rxkad; 462 }; 463 unsigned long flags; 464 unsigned long events; 465 unsigned long idle_timestamp; /* Time at which last became idle */ 466 spinlock_t state_lock; /* state-change lock */ 467 enum rxrpc_conn_proto_state state; /* current state of connection */ 468 u32 abort_code; /* Abort code of connection abort */ 469 int debug_id; /* debug ID for printks */ 470 atomic_t serial; /* packet serial number counter */ 471 unsigned int hi_serial; /* highest serial number received */ 472 u32 service_id; /* Service ID, possibly upgraded */ 473 u8 security_ix; /* security type */ 474 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 475 u8 bundle_shift; /* Index into bundle->avail_chans */ 476 short error; /* Local error code */ 477 }; 478 479 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 480 { 481 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 482 } 483 484 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 485 { 486 return !rxrpc_to_server(sp); 487 } 488 489 /* 490 * Flags in call->flags. 491 */ 492 enum rxrpc_call_flag { 493 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 494 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 495 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 496 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 497 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 498 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 499 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */ 500 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 501 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 502 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 503 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 504 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 505 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 506 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 507 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 508 RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */ 509 RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */ 510 }; 511 512 /* 513 * Events that can be raised on a call. 514 */ 515 enum rxrpc_call_event { 516 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 517 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 518 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 519 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 520 }; 521 522 /* 523 * The states that a call can be in. 524 */ 525 enum rxrpc_call_state { 526 RXRPC_CALL_UNINITIALISED, 527 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 528 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 529 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 530 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 531 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 532 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 533 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 534 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 535 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 536 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 537 RXRPC_CALL_COMPLETE, /* - call complete */ 538 NR__RXRPC_CALL_STATES 539 }; 540 541 /* 542 * Call completion condition (state == RXRPC_CALL_COMPLETE). 543 */ 544 enum rxrpc_call_completion { 545 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 546 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 547 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 548 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 549 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 550 NR__RXRPC_CALL_COMPLETIONS 551 }; 552 553 /* 554 * Call Tx congestion management modes. 555 */ 556 enum rxrpc_congest_mode { 557 RXRPC_CALL_SLOW_START, 558 RXRPC_CALL_CONGEST_AVOIDANCE, 559 RXRPC_CALL_PACKET_LOSS, 560 RXRPC_CALL_FAST_RETRANSMIT, 561 NR__RXRPC_CONGEST_MODES 562 }; 563 564 /* 565 * RxRPC call definition 566 * - matched by { connection, call_id } 567 */ 568 struct rxrpc_call { 569 struct rcu_head rcu; 570 struct rxrpc_connection *conn; /* connection carrying call */ 571 struct rxrpc_peer *peer; /* Peer record for remote address */ 572 struct rxrpc_sock __rcu *socket; /* socket responsible */ 573 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 574 const struct rxrpc_security *security; /* applied security module */ 575 struct mutex user_mutex; /* User access mutex */ 576 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ 577 unsigned long ack_lost_at; /* When ACK is figured as lost */ 578 unsigned long resend_at; /* When next resend needs to happen */ 579 unsigned long ping_at; /* When next to send a ping */ 580 unsigned long keepalive_at; /* When next to send a keepalive ping */ 581 unsigned long expect_rx_by; /* When we expect to get a packet by */ 582 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 583 unsigned long expect_term_by; /* When we expect call termination by */ 584 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 585 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 586 struct timer_list timer; /* Combined event timer */ 587 struct work_struct processor; /* Event processor */ 588 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 589 struct list_head link; /* link in master call list */ 590 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 591 struct hlist_node error_link; /* link in error distribution list */ 592 struct list_head accept_link; /* Link in rx->acceptq */ 593 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 594 struct list_head sock_link; /* Link in rx->sock_calls */ 595 struct rb_node sock_node; /* Node in rx->calls */ 596 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */ 597 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 598 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 599 unsigned long user_call_ID; /* user-defined call ID */ 600 unsigned long flags; 601 unsigned long events; 602 spinlock_t notify_lock; /* Kernel notification lock */ 603 rwlock_t state_lock; /* lock for state transition */ 604 u32 abort_code; /* Local/remote abort code */ 605 int error; /* Local error incurred */ 606 enum rxrpc_call_state state; /* current state of call */ 607 enum rxrpc_call_completion completion; /* Call completion condition */ 608 refcount_t ref; 609 u16 service_id; /* service ID */ 610 u8 security_ix; /* Security type */ 611 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 612 u32 call_id; /* call ID on connection */ 613 u32 cid; /* connection ID plus channel index */ 614 int debug_id; /* debug ID for printks */ 615 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 616 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 617 618 /* Transmitted data tracking. */ 619 spinlock_t tx_lock; /* Transmit queue lock */ 620 struct list_head tx_buffer; /* Buffer of transmissible packets */ 621 rxrpc_seq_t tx_bottom; /* First packet in buffer */ 622 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */ 623 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 624 u16 tx_backoff; /* Delay to insert due to Tx failure */ 625 u8 tx_winsize; /* Maximum size of Tx window */ 626 #define RXRPC_TX_MAX_WINDOW 128 627 ktime_t tx_last_sent; /* Last time a transmission occurred */ 628 629 /* Received data tracking */ 630 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */ 631 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */ 632 633 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */ 634 rxrpc_seq_t rx_consumed; /* Highest packet consumed */ 635 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 636 u8 rx_winsize; /* Size of Rx window */ 637 spinlock_t input_lock; /* Lock for packet input to this call */ 638 639 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 640 * is fixed, we keep these numbers in terms of segments (ie. DATA 641 * packets) rather than bytes. 642 */ 643 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 644 u8 cong_cwnd; /* Congestion window size */ 645 u8 cong_extra; /* Extra to send for congestion management */ 646 u8 cong_ssthresh; /* Slow-start threshold */ 647 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 648 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 649 u8 cong_cumul_acks; /* Cumulative ACK count */ 650 ktime_t cong_tstamp; /* Last time cwnd was changed */ 651 652 /* Receive-phase ACK management (ACKs we send). */ 653 u8 ackr_reason; /* reason to ACK */ 654 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 655 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */ 656 atomic_t ackr_nr_unacked; /* Number of unacked packets */ 657 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 658 struct { 659 #define RXRPC_SACK_SIZE 256 660 /* SACK table for soft-acked packets */ 661 u8 ackr_sack_table[RXRPC_SACK_SIZE]; 662 } __aligned(8); 663 664 /* RTT management */ 665 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 666 ktime_t rtt_sent_at[4]; /* Time packet sent */ 667 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 668 * Mask of pending samples in 8-11 */ 669 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 670 #define RXRPC_CALL_RTT_PEND_SHIFT 8 671 672 /* Transmission-phase ACK management (ACKs we've received). */ 673 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 674 rxrpc_seq_t acks_first_seq; /* first sequence number received */ 675 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 676 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */ 677 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 678 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 679 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 680 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 681 struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */ 682 spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */ 683 }; 684 685 /* 686 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 687 */ 688 struct rxrpc_ack_summary { 689 u16 nr_acks; /* Number of ACKs in packet */ 690 u16 nr_new_acks; /* Number of new ACKs in packet */ 691 u16 nr_rot_new_acks; /* Number of rotated new ACKs */ 692 u8 ack_reason; 693 bool saw_nacks; /* Saw NACKs in packet */ 694 bool new_low_nack; /* T if new low NACK found */ 695 bool retrans_timeo; /* T if reTx due to timeout happened */ 696 u8 flight_size; /* Number of unreceived transmissions */ 697 /* Place to stash values for tracing */ 698 enum rxrpc_congest_mode mode:8; 699 u8 cwnd; 700 u8 ssthresh; 701 u8 dup_acks; 702 u8 cumulative_acks; 703 }; 704 705 /* 706 * sendmsg() cmsg-specified parameters. 707 */ 708 enum rxrpc_command { 709 RXRPC_CMD_SEND_DATA, /* send data message */ 710 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 711 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 712 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 713 }; 714 715 struct rxrpc_call_params { 716 s64 tx_total_len; /* Total Tx data length (if send data) */ 717 unsigned long user_call_ID; /* User's call ID */ 718 struct { 719 u32 hard; /* Maximum lifetime (sec) */ 720 u32 idle; /* Max time since last data packet (msec) */ 721 u32 normal; /* Max time since last call packet (msec) */ 722 } timeouts; 723 u8 nr_timeouts; /* Number of timeouts specified */ 724 bool kernel; /* T if kernel is making the call */ 725 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 726 }; 727 728 struct rxrpc_send_params { 729 struct rxrpc_call_params call; 730 u32 abort_code; /* Abort code to Tx (if abort) */ 731 enum rxrpc_command command : 8; /* The command to implement */ 732 bool exclusive; /* Shared or exclusive call */ 733 bool upgrade; /* If the connection is upgradeable */ 734 }; 735 736 /* 737 * Buffer of data to be output as a packet. 738 */ 739 struct rxrpc_txbuf { 740 struct rcu_head rcu; 741 struct list_head call_link; /* Link in call->tx_queue */ 742 struct list_head tx_link; /* Link in live Enc queue or Tx queue */ 743 struct rxrpc_call *call; /* Call to which belongs */ 744 ktime_t last_sent; /* Time at which last transmitted */ 745 refcount_t ref; 746 rxrpc_seq_t seq; /* Sequence number of this packet */ 747 unsigned int call_debug_id; 748 unsigned int debug_id; 749 unsigned int len; /* Amount of data in buffer */ 750 unsigned int space; /* Remaining data space */ 751 unsigned int offset; /* Offset of fill point */ 752 unsigned long flags; 753 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */ 754 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */ 755 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ 756 struct { 757 /* The packet for encrypting and DMA'ing. We align it such 758 * that data[] aligns correctly for any crypto blocksize. 759 */ 760 u8 pad[64 - sizeof(struct rxrpc_wire_header)]; 761 struct rxrpc_wire_header wire; /* Network-ready header */ 762 union { 763 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */ 764 struct { 765 struct rxrpc_ackpacket ack; 766 u8 acks[0]; 767 }; 768 }; 769 } __aligned(64); 770 }; 771 772 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) 773 { 774 return txb->wire.flags & RXRPC_CLIENT_INITIATED; 775 } 776 777 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) 778 { 779 return !rxrpc_sending_to_server(txb); 780 } 781 782 #include <trace/events/rxrpc.h> 783 784 /* 785 * af_rxrpc.c 786 */ 787 extern atomic_t rxrpc_n_rx_skbs; 788 extern struct workqueue_struct *rxrpc_workqueue; 789 790 /* 791 * call_accept.c 792 */ 793 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 794 void rxrpc_discard_prealloc(struct rxrpc_sock *); 795 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 796 struct rxrpc_sock *, 797 struct sk_buff *); 798 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 799 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 800 801 /* 802 * call_event.c 803 */ 804 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, 805 enum rxrpc_propose_ack_trace why); 806 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); 807 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, 808 enum rxrpc_propose_ack_trace); 809 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); 810 void rxrpc_process_call(struct work_struct *); 811 812 void rxrpc_reduce_call_timer(struct rxrpc_call *call, 813 unsigned long expire_at, 814 unsigned long now, 815 enum rxrpc_timer_trace why); 816 817 void rxrpc_delete_call_timer(struct rxrpc_call *call); 818 819 /* 820 * call_object.c 821 */ 822 extern const char *const rxrpc_call_states[]; 823 extern const char *const rxrpc_call_completions[]; 824 extern struct kmem_cache *rxrpc_call_jar; 825 826 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 827 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 828 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 829 struct rxrpc_conn_parameters *, 830 struct sockaddr_rxrpc *, 831 struct rxrpc_call_params *, gfp_t, 832 unsigned int); 833 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 834 struct sk_buff *); 835 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 836 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 837 bool __rxrpc_queue_call(struct rxrpc_call *); 838 bool rxrpc_queue_call(struct rxrpc_call *); 839 void rxrpc_see_call(struct rxrpc_call *); 840 bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 841 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 842 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 843 void rxrpc_cleanup_call(struct rxrpc_call *); 844 void rxrpc_destroy_all_calls(struct rxrpc_net *); 845 846 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 847 { 848 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 849 } 850 851 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 852 { 853 return !rxrpc_is_service_call(call); 854 } 855 856 /* 857 * conn_client.c 858 */ 859 extern unsigned int rxrpc_reap_client_connections; 860 extern unsigned long rxrpc_conn_idle_client_expiry; 861 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 862 extern struct idr rxrpc_client_conn_ids; 863 864 void rxrpc_destroy_client_conn_ids(void); 865 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 866 void rxrpc_put_bundle(struct rxrpc_bundle *); 867 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 868 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 869 gfp_t); 870 void rxrpc_expose_client_call(struct rxrpc_call *); 871 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 872 void rxrpc_put_client_conn(struct rxrpc_connection *); 873 void rxrpc_discard_expired_client_conns(struct work_struct *); 874 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 875 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 876 877 /* 878 * conn_event.c 879 */ 880 void rxrpc_process_connection(struct work_struct *); 881 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 882 883 /* 884 * conn_object.c 885 */ 886 extern unsigned int rxrpc_connection_expiry; 887 extern unsigned int rxrpc_closed_conn_expiry; 888 889 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 890 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 891 struct sk_buff *, 892 struct rxrpc_peer **); 893 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 894 void rxrpc_disconnect_call(struct rxrpc_call *); 895 void rxrpc_kill_connection(struct rxrpc_connection *); 896 bool rxrpc_queue_conn(struct rxrpc_connection *); 897 void rxrpc_see_connection(struct rxrpc_connection *); 898 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 899 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 900 void rxrpc_put_service_conn(struct rxrpc_connection *); 901 void rxrpc_service_connection_reaper(struct work_struct *); 902 void rxrpc_destroy_all_connections(struct rxrpc_net *); 903 904 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 905 { 906 return conn->out_clientflag; 907 } 908 909 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 910 { 911 return !rxrpc_conn_is_client(conn); 912 } 913 914 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 915 { 916 if (!conn) 917 return; 918 919 if (rxrpc_conn_is_client(conn)) 920 rxrpc_put_client_conn(conn); 921 else 922 rxrpc_put_service_conn(conn); 923 } 924 925 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 926 unsigned long expire_at) 927 { 928 timer_reduce(&conn->timer, expire_at); 929 } 930 931 /* 932 * conn_service.c 933 */ 934 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 935 struct sk_buff *); 936 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 937 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 938 const struct rxrpc_security *, struct sk_buff *); 939 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 940 941 /* 942 * input.c 943 */ 944 int rxrpc_input_packet(struct sock *, struct sk_buff *); 945 946 /* 947 * insecure.c 948 */ 949 extern const struct rxrpc_security rxrpc_no_security; 950 951 /* 952 * key.c 953 */ 954 extern struct key_type key_type_rxrpc; 955 956 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 957 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 958 u32); 959 960 /* 961 * local_event.c 962 */ 963 extern void rxrpc_process_local_events(struct rxrpc_local *); 964 965 /* 966 * local_object.c 967 */ 968 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 969 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 970 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 971 void rxrpc_put_local(struct rxrpc_local *); 972 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 973 void rxrpc_unuse_local(struct rxrpc_local *); 974 void rxrpc_queue_local(struct rxrpc_local *); 975 void rxrpc_destroy_all_locals(struct rxrpc_net *); 976 977 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 978 { 979 return atomic_dec_return(&local->active_users) == 0; 980 } 981 982 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 983 { 984 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 985 } 986 987 /* 988 * misc.c 989 */ 990 extern unsigned int rxrpc_max_backlog __read_mostly; 991 extern unsigned long rxrpc_soft_ack_delay; 992 extern unsigned long rxrpc_idle_ack_delay; 993 extern unsigned int rxrpc_rx_window_size; 994 extern unsigned int rxrpc_rx_mtu; 995 extern unsigned int rxrpc_rx_jumbo_max; 996 997 /* 998 * net_ns.c 999 */ 1000 extern unsigned int rxrpc_net_id; 1001 extern struct pernet_operations rxrpc_net_ops; 1002 1003 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1004 { 1005 return net_generic(net, rxrpc_net_id); 1006 } 1007 1008 /* 1009 * output.c 1010 */ 1011 void rxrpc_transmit_ack_packets(struct rxrpc_local *); 1012 int rxrpc_send_abort_packet(struct rxrpc_call *); 1013 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *); 1014 void rxrpc_reject_packets(struct rxrpc_local *); 1015 void rxrpc_send_keepalive(struct rxrpc_peer *); 1016 1017 /* 1018 * peer_event.c 1019 */ 1020 void rxrpc_error_report(struct sock *); 1021 void rxrpc_peer_keepalive_worker(struct work_struct *); 1022 1023 /* 1024 * peer_object.c 1025 */ 1026 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1027 const struct sockaddr_rxrpc *); 1028 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1029 struct sockaddr_rxrpc *, gfp_t); 1030 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1031 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1032 struct rxrpc_peer *); 1033 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1034 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1035 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1036 void rxrpc_put_peer(struct rxrpc_peer *); 1037 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1038 1039 /* 1040 * proc.c 1041 */ 1042 extern const struct seq_operations rxrpc_call_seq_ops; 1043 extern const struct seq_operations rxrpc_connection_seq_ops; 1044 extern const struct seq_operations rxrpc_peer_seq_ops; 1045 extern const struct seq_operations rxrpc_local_seq_ops; 1046 1047 /* 1048 * recvmsg.c 1049 */ 1050 void rxrpc_notify_socket(struct rxrpc_call *); 1051 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1052 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1053 bool __rxrpc_call_completed(struct rxrpc_call *); 1054 bool rxrpc_call_completed(struct rxrpc_call *); 1055 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1056 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1057 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1058 1059 /* 1060 * Abort a call due to a protocol error. 1061 */ 1062 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1063 struct sk_buff *skb, 1064 const char *eproto_why, 1065 const char *why, 1066 u32 abort_code) 1067 { 1068 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1069 1070 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1071 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1072 } 1073 1074 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1075 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1076 (abort_why), (abort_code)) 1077 1078 /* 1079 * rtt.c 1080 */ 1081 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1082 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1083 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1084 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1085 1086 /* 1087 * rxkad.c 1088 */ 1089 #ifdef CONFIG_RXKAD 1090 extern const struct rxrpc_security rxkad; 1091 #endif 1092 1093 /* 1094 * security.c 1095 */ 1096 int __init rxrpc_init_security(void); 1097 const struct rxrpc_security *rxrpc_security_lookup(u8); 1098 void rxrpc_exit_security(void); 1099 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1100 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1101 struct sk_buff *); 1102 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1103 struct sk_buff *, u32, u32); 1104 1105 /* 1106 * sendmsg.c 1107 */ 1108 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1109 1110 /* 1111 * server_key.c 1112 */ 1113 extern struct key_type key_type_rxrpc_s; 1114 1115 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1116 1117 /* 1118 * skbuff.c 1119 */ 1120 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1121 void rxrpc_packet_destructor(struct sk_buff *); 1122 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1123 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1124 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1125 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1126 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1127 void rxrpc_purge_queue(struct sk_buff_head *); 1128 1129 /* 1130 * stats.c 1131 */ 1132 int rxrpc_stats_show(struct seq_file *seq, void *v); 1133 int rxrpc_stats_clear(struct file *file, char *buf, size_t size); 1134 1135 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) 1136 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) 1137 1138 /* 1139 * sysctl.c 1140 */ 1141 #ifdef CONFIG_SYSCTL 1142 extern int __init rxrpc_sysctl_init(void); 1143 extern void rxrpc_sysctl_exit(void); 1144 #else 1145 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1146 static inline void rxrpc_sysctl_exit(void) {} 1147 #endif 1148 1149 /* 1150 * txbuf.c 1151 */ 1152 extern atomic_t rxrpc_nr_txbuf; 1153 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, 1154 gfp_t gfp); 1155 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1156 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1157 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1158 1159 /* 1160 * utils.c 1161 */ 1162 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1163 1164 static inline bool before(u32 seq1, u32 seq2) 1165 { 1166 return (s32)(seq1 - seq2) < 0; 1167 } 1168 static inline bool before_eq(u32 seq1, u32 seq2) 1169 { 1170 return (s32)(seq1 - seq2) <= 0; 1171 } 1172 static inline bool after(u32 seq1, u32 seq2) 1173 { 1174 return (s32)(seq1 - seq2) > 0; 1175 } 1176 static inline bool after_eq(u32 seq1, u32 seq2) 1177 { 1178 return (s32)(seq1 - seq2) >= 0; 1179 } 1180 1181 /* 1182 * debug tracing 1183 */ 1184 extern unsigned int rxrpc_debug; 1185 1186 #define dbgprintk(FMT,...) \ 1187 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1188 1189 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1190 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1191 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1192 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1193 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1194 1195 1196 #if defined(__KDEBUG) 1197 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1198 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1199 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1200 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1201 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1202 1203 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1204 #define RXRPC_DEBUG_KENTER 0x01 1205 #define RXRPC_DEBUG_KLEAVE 0x02 1206 #define RXRPC_DEBUG_KDEBUG 0x04 1207 #define RXRPC_DEBUG_KPROTO 0x08 1208 #define RXRPC_DEBUG_KNET 0x10 1209 1210 #define _enter(FMT,...) \ 1211 do { \ 1212 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1213 kenter(FMT,##__VA_ARGS__); \ 1214 } while (0) 1215 1216 #define _leave(FMT,...) \ 1217 do { \ 1218 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1219 kleave(FMT,##__VA_ARGS__); \ 1220 } while (0) 1221 1222 #define _debug(FMT,...) \ 1223 do { \ 1224 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1225 kdebug(FMT,##__VA_ARGS__); \ 1226 } while (0) 1227 1228 #define _proto(FMT,...) \ 1229 do { \ 1230 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1231 kproto(FMT,##__VA_ARGS__); \ 1232 } while (0) 1233 1234 #define _net(FMT,...) \ 1235 do { \ 1236 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1237 knet(FMT,##__VA_ARGS__); \ 1238 } while (0) 1239 1240 #else 1241 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1242 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1243 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1244 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1245 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1246 #endif 1247 1248 /* 1249 * debug assertion checking 1250 */ 1251 #if 1 // defined(__KDEBUGALL) 1252 1253 #define ASSERT(X) \ 1254 do { \ 1255 if (unlikely(!(X))) { \ 1256 pr_err("Assertion failed\n"); \ 1257 BUG(); \ 1258 } \ 1259 } while (0) 1260 1261 #define ASSERTCMP(X, OP, Y) \ 1262 do { \ 1263 __typeof__(X) _x = (X); \ 1264 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1265 if (unlikely(!(_x OP _y))) { \ 1266 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1267 (unsigned long)_x, (unsigned long)_x, #OP, \ 1268 (unsigned long)_y, (unsigned long)_y); \ 1269 BUG(); \ 1270 } \ 1271 } while (0) 1272 1273 #define ASSERTIF(C, X) \ 1274 do { \ 1275 if (unlikely((C) && !(X))) { \ 1276 pr_err("Assertion failed\n"); \ 1277 BUG(); \ 1278 } \ 1279 } while (0) 1280 1281 #define ASSERTIFCMP(C, X, OP, Y) \ 1282 do { \ 1283 __typeof__(X) _x = (X); \ 1284 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1285 if (unlikely((C) && !(_x OP _y))) { \ 1286 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1287 (unsigned long)_x, (unsigned long)_x, #OP, \ 1288 (unsigned long)_y, (unsigned long)_y); \ 1289 BUG(); \ 1290 } \ 1291 } while (0) 1292 1293 #else 1294 1295 #define ASSERT(X) \ 1296 do { \ 1297 } while (0) 1298 1299 #define ASSERTCMP(X, OP, Y) \ 1300 do { \ 1301 } while (0) 1302 1303 #define ASSERTIF(C, X) \ 1304 do { \ 1305 } while (0) 1306 1307 #define ASSERTIFCMP(C, X, OP, Y) \ 1308 do { \ 1309 } while (0) 1310 1311 #endif /* __KDEBUGALL */ 1312