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 atomic_t active; /* Number of active users */ 409 unsigned int debug_id; 410 bool try_upgrade; /* True if the bundle is attempting upgrade */ 411 bool alloc_conn; /* True if someone's getting a conn */ 412 short alloc_error; /* Error from last conn allocation */ 413 spinlock_t channel_lock; 414 struct rb_node local_node; /* Node in local->client_conns */ 415 struct list_head waiting_calls; /* Calls waiting for channels */ 416 unsigned long avail_chans; /* Mask of available channels */ 417 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 418 }; 419 420 /* 421 * RxRPC connection definition 422 * - matched by { local, peer, epoch, conn_id, direction } 423 * - each connection can only handle four simultaneous calls 424 */ 425 struct rxrpc_connection { 426 struct rxrpc_conn_proto proto; 427 struct rxrpc_conn_parameters params; 428 429 refcount_t ref; 430 struct rcu_head rcu; 431 struct list_head cache_link; 432 433 unsigned char act_chans; /* Mask of active channels */ 434 struct rxrpc_channel { 435 unsigned long final_ack_at; /* Time at which to issue final ACK */ 436 struct rxrpc_call __rcu *call; /* Active call */ 437 unsigned int call_debug_id; /* call->debug_id */ 438 u32 call_id; /* ID of current call */ 439 u32 call_counter; /* Call ID counter */ 440 u32 last_call; /* ID of last call */ 441 u8 last_type; /* Type of last packet */ 442 union { 443 u32 last_seq; 444 u32 last_abort; 445 }; 446 } channels[RXRPC_MAXCALLS]; 447 448 struct timer_list timer; /* Conn event timer */ 449 struct work_struct processor; /* connection event processor */ 450 struct rxrpc_bundle *bundle; /* Client connection bundle */ 451 struct rb_node service_node; /* Node in peer->service_conns */ 452 struct list_head proc_link; /* link in procfs list */ 453 struct list_head link; /* link in master connection list */ 454 struct sk_buff_head rx_queue; /* received conn-level packets */ 455 456 const struct rxrpc_security *security; /* applied security module */ 457 union { 458 struct { 459 struct crypto_sync_skcipher *cipher; /* encryption handle */ 460 struct rxrpc_crypt csum_iv; /* packet checksum base */ 461 u32 nonce; /* response re-use preventer */ 462 } rxkad; 463 }; 464 unsigned long flags; 465 unsigned long events; 466 unsigned long idle_timestamp; /* Time at which last became idle */ 467 spinlock_t state_lock; /* state-change lock */ 468 enum rxrpc_conn_proto_state state; /* current state of connection */ 469 u32 abort_code; /* Abort code of connection abort */ 470 int debug_id; /* debug ID for printks */ 471 atomic_t serial; /* packet serial number counter */ 472 unsigned int hi_serial; /* highest serial number received */ 473 u32 service_id; /* Service ID, possibly upgraded */ 474 u8 security_ix; /* security type */ 475 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 476 u8 bundle_shift; /* Index into bundle->avail_chans */ 477 short error; /* Local error code */ 478 }; 479 480 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 481 { 482 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 483 } 484 485 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 486 { 487 return !rxrpc_to_server(sp); 488 } 489 490 /* 491 * Flags in call->flags. 492 */ 493 enum rxrpc_call_flag { 494 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 495 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 496 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 497 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 498 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 499 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 500 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */ 501 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 502 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 503 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 504 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 505 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 506 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 507 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 508 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 509 RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */ 510 RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */ 511 }; 512 513 /* 514 * Events that can be raised on a call. 515 */ 516 enum rxrpc_call_event { 517 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 518 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 519 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 520 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 521 }; 522 523 /* 524 * The states that a call can be in. 525 */ 526 enum rxrpc_call_state { 527 RXRPC_CALL_UNINITIALISED, 528 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 529 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 530 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 531 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 532 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 533 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 534 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 535 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 536 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 537 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 538 RXRPC_CALL_COMPLETE, /* - call complete */ 539 NR__RXRPC_CALL_STATES 540 }; 541 542 /* 543 * Call completion condition (state == RXRPC_CALL_COMPLETE). 544 */ 545 enum rxrpc_call_completion { 546 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 547 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 548 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 549 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 550 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 551 NR__RXRPC_CALL_COMPLETIONS 552 }; 553 554 /* 555 * Call Tx congestion management modes. 556 */ 557 enum rxrpc_congest_mode { 558 RXRPC_CALL_SLOW_START, 559 RXRPC_CALL_CONGEST_AVOIDANCE, 560 RXRPC_CALL_PACKET_LOSS, 561 RXRPC_CALL_FAST_RETRANSMIT, 562 NR__RXRPC_CONGEST_MODES 563 }; 564 565 /* 566 * RxRPC call definition 567 * - matched by { connection, call_id } 568 */ 569 struct rxrpc_call { 570 struct rcu_head rcu; 571 struct rxrpc_connection *conn; /* connection carrying call */ 572 struct rxrpc_peer *peer; /* Peer record for remote address */ 573 struct rxrpc_sock __rcu *socket; /* socket responsible */ 574 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 575 const struct rxrpc_security *security; /* applied security module */ 576 struct mutex user_mutex; /* User access mutex */ 577 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ 578 unsigned long ack_lost_at; /* When ACK is figured as lost */ 579 unsigned long resend_at; /* When next resend needs to happen */ 580 unsigned long ping_at; /* When next to send a ping */ 581 unsigned long keepalive_at; /* When next to send a keepalive ping */ 582 unsigned long expect_rx_by; /* When we expect to get a packet by */ 583 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 584 unsigned long expect_term_by; /* When we expect call termination by */ 585 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 586 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 587 struct timer_list timer; /* Combined event timer */ 588 struct work_struct processor; /* Event processor */ 589 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 590 struct list_head link; /* link in master call list */ 591 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 592 struct hlist_node error_link; /* link in error distribution list */ 593 struct list_head accept_link; /* Link in rx->acceptq */ 594 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 595 struct list_head sock_link; /* Link in rx->sock_calls */ 596 struct rb_node sock_node; /* Node in rx->calls */ 597 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */ 598 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 599 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 600 unsigned long user_call_ID; /* user-defined call ID */ 601 unsigned long flags; 602 unsigned long events; 603 spinlock_t notify_lock; /* Kernel notification lock */ 604 rwlock_t state_lock; /* lock for state transition */ 605 u32 abort_code; /* Local/remote abort code */ 606 int error; /* Local error incurred */ 607 enum rxrpc_call_state state; /* current state of call */ 608 enum rxrpc_call_completion completion; /* Call completion condition */ 609 refcount_t ref; 610 u16 service_id; /* service ID */ 611 u8 security_ix; /* Security type */ 612 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 613 u32 call_id; /* call ID on connection */ 614 u32 cid; /* connection ID plus channel index */ 615 int debug_id; /* debug ID for printks */ 616 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 617 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 618 619 /* Transmitted data tracking. */ 620 spinlock_t tx_lock; /* Transmit queue lock */ 621 struct list_head tx_buffer; /* Buffer of transmissible packets */ 622 rxrpc_seq_t tx_bottom; /* First packet in buffer */ 623 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */ 624 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 625 u16 tx_backoff; /* Delay to insert due to Tx failure */ 626 u8 tx_winsize; /* Maximum size of Tx window */ 627 #define RXRPC_TX_MAX_WINDOW 128 628 ktime_t tx_last_sent; /* Last time a transmission occurred */ 629 630 /* Received data tracking */ 631 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */ 632 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */ 633 634 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */ 635 rxrpc_seq_t rx_consumed; /* Highest packet consumed */ 636 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 637 u8 rx_winsize; /* Size of Rx window */ 638 spinlock_t input_lock; /* Lock for packet input to this call */ 639 640 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 641 * is fixed, we keep these numbers in terms of segments (ie. DATA 642 * packets) rather than bytes. 643 */ 644 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 645 u8 cong_cwnd; /* Congestion window size */ 646 u8 cong_extra; /* Extra to send for congestion management */ 647 u8 cong_ssthresh; /* Slow-start threshold */ 648 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 649 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 650 u8 cong_cumul_acks; /* Cumulative ACK count */ 651 ktime_t cong_tstamp; /* Last time cwnd was changed */ 652 653 /* Receive-phase ACK management (ACKs we send). */ 654 u8 ackr_reason; /* reason to ACK */ 655 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 656 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */ 657 atomic_t ackr_nr_unacked; /* Number of unacked packets */ 658 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 659 struct { 660 #define RXRPC_SACK_SIZE 256 661 /* SACK table for soft-acked packets */ 662 u8 ackr_sack_table[RXRPC_SACK_SIZE]; 663 } __aligned(8); 664 665 /* RTT management */ 666 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 667 ktime_t rtt_sent_at[4]; /* Time packet sent */ 668 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 669 * Mask of pending samples in 8-11 */ 670 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 671 #define RXRPC_CALL_RTT_PEND_SHIFT 8 672 673 /* Transmission-phase ACK management (ACKs we've received). */ 674 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 675 rxrpc_seq_t acks_first_seq; /* first sequence number received */ 676 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 677 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */ 678 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 679 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 680 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 681 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 682 struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */ 683 spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */ 684 }; 685 686 /* 687 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 688 */ 689 struct rxrpc_ack_summary { 690 u16 nr_acks; /* Number of ACKs in packet */ 691 u16 nr_new_acks; /* Number of new ACKs in packet */ 692 u16 nr_rot_new_acks; /* Number of rotated new ACKs */ 693 u8 ack_reason; 694 bool saw_nacks; /* Saw NACKs in packet */ 695 bool new_low_nack; /* T if new low NACK found */ 696 bool retrans_timeo; /* T if reTx due to timeout happened */ 697 u8 flight_size; /* Number of unreceived transmissions */ 698 /* Place to stash values for tracing */ 699 enum rxrpc_congest_mode mode:8; 700 u8 cwnd; 701 u8 ssthresh; 702 u8 dup_acks; 703 u8 cumulative_acks; 704 }; 705 706 /* 707 * sendmsg() cmsg-specified parameters. 708 */ 709 enum rxrpc_command { 710 RXRPC_CMD_SEND_DATA, /* send data message */ 711 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 712 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 713 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 714 }; 715 716 struct rxrpc_call_params { 717 s64 tx_total_len; /* Total Tx data length (if send data) */ 718 unsigned long user_call_ID; /* User's call ID */ 719 struct { 720 u32 hard; /* Maximum lifetime (sec) */ 721 u32 idle; /* Max time since last data packet (msec) */ 722 u32 normal; /* Max time since last call packet (msec) */ 723 } timeouts; 724 u8 nr_timeouts; /* Number of timeouts specified */ 725 bool kernel; /* T if kernel is making the call */ 726 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 727 }; 728 729 struct rxrpc_send_params { 730 struct rxrpc_call_params call; 731 u32 abort_code; /* Abort code to Tx (if abort) */ 732 enum rxrpc_command command : 8; /* The command to implement */ 733 bool exclusive; /* Shared or exclusive call */ 734 bool upgrade; /* If the connection is upgradeable */ 735 }; 736 737 /* 738 * Buffer of data to be output as a packet. 739 */ 740 struct rxrpc_txbuf { 741 struct rcu_head rcu; 742 struct list_head call_link; /* Link in call->tx_queue */ 743 struct list_head tx_link; /* Link in live Enc queue or Tx queue */ 744 struct rxrpc_call *call; /* Call to which belongs */ 745 ktime_t last_sent; /* Time at which last transmitted */ 746 refcount_t ref; 747 rxrpc_seq_t seq; /* Sequence number of this packet */ 748 unsigned int call_debug_id; 749 unsigned int debug_id; 750 unsigned int len; /* Amount of data in buffer */ 751 unsigned int space; /* Remaining data space */ 752 unsigned int offset; /* Offset of fill point */ 753 unsigned long flags; 754 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */ 755 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */ 756 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ 757 struct { 758 /* The packet for encrypting and DMA'ing. We align it such 759 * that data[] aligns correctly for any crypto blocksize. 760 */ 761 u8 pad[64 - sizeof(struct rxrpc_wire_header)]; 762 struct rxrpc_wire_header wire; /* Network-ready header */ 763 union { 764 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */ 765 struct { 766 struct rxrpc_ackpacket ack; 767 u8 acks[0]; 768 }; 769 }; 770 } __aligned(64); 771 }; 772 773 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) 774 { 775 return txb->wire.flags & RXRPC_CLIENT_INITIATED; 776 } 777 778 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) 779 { 780 return !rxrpc_sending_to_server(txb); 781 } 782 783 #include <trace/events/rxrpc.h> 784 785 /* 786 * af_rxrpc.c 787 */ 788 extern atomic_t rxrpc_n_rx_skbs; 789 extern struct workqueue_struct *rxrpc_workqueue; 790 791 /* 792 * call_accept.c 793 */ 794 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 795 void rxrpc_discard_prealloc(struct rxrpc_sock *); 796 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 797 struct rxrpc_sock *, 798 struct sk_buff *); 799 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 800 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 801 802 /* 803 * call_event.c 804 */ 805 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, 806 enum rxrpc_propose_ack_trace why); 807 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); 808 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, 809 enum rxrpc_propose_ack_trace); 810 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); 811 void rxrpc_process_call(struct work_struct *); 812 813 void rxrpc_reduce_call_timer(struct rxrpc_call *call, 814 unsigned long expire_at, 815 unsigned long now, 816 enum rxrpc_timer_trace why); 817 818 void rxrpc_delete_call_timer(struct rxrpc_call *call); 819 820 /* 821 * call_object.c 822 */ 823 extern const char *const rxrpc_call_states[]; 824 extern const char *const rxrpc_call_completions[]; 825 extern struct kmem_cache *rxrpc_call_jar; 826 827 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 828 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 829 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 830 struct rxrpc_conn_parameters *, 831 struct sockaddr_rxrpc *, 832 struct rxrpc_call_params *, gfp_t, 833 unsigned int); 834 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 835 struct sk_buff *); 836 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 837 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 838 bool __rxrpc_queue_call(struct rxrpc_call *); 839 bool rxrpc_queue_call(struct rxrpc_call *); 840 void rxrpc_see_call(struct rxrpc_call *); 841 bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 842 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 843 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 844 void rxrpc_cleanup_call(struct rxrpc_call *); 845 void rxrpc_destroy_all_calls(struct rxrpc_net *); 846 847 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 848 { 849 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 850 } 851 852 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 853 { 854 return !rxrpc_is_service_call(call); 855 } 856 857 /* 858 * conn_client.c 859 */ 860 extern unsigned int rxrpc_reap_client_connections; 861 extern unsigned long rxrpc_conn_idle_client_expiry; 862 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 863 extern struct idr rxrpc_client_conn_ids; 864 865 void rxrpc_destroy_client_conn_ids(void); 866 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 867 void rxrpc_put_bundle(struct rxrpc_bundle *); 868 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 869 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 870 gfp_t); 871 void rxrpc_expose_client_call(struct rxrpc_call *); 872 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 873 void rxrpc_put_client_conn(struct rxrpc_connection *); 874 void rxrpc_discard_expired_client_conns(struct work_struct *); 875 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 876 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 877 878 /* 879 * conn_event.c 880 */ 881 void rxrpc_process_connection(struct work_struct *); 882 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 883 884 /* 885 * conn_object.c 886 */ 887 extern unsigned int rxrpc_connection_expiry; 888 extern unsigned int rxrpc_closed_conn_expiry; 889 890 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 891 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 892 struct sk_buff *, 893 struct rxrpc_peer **); 894 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 895 void rxrpc_disconnect_call(struct rxrpc_call *); 896 void rxrpc_kill_connection(struct rxrpc_connection *); 897 bool rxrpc_queue_conn(struct rxrpc_connection *); 898 void rxrpc_see_connection(struct rxrpc_connection *); 899 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 900 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 901 void rxrpc_put_service_conn(struct rxrpc_connection *); 902 void rxrpc_service_connection_reaper(struct work_struct *); 903 void rxrpc_destroy_all_connections(struct rxrpc_net *); 904 905 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 906 { 907 return conn->out_clientflag; 908 } 909 910 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 911 { 912 return !rxrpc_conn_is_client(conn); 913 } 914 915 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 916 { 917 if (!conn) 918 return; 919 920 if (rxrpc_conn_is_client(conn)) 921 rxrpc_put_client_conn(conn); 922 else 923 rxrpc_put_service_conn(conn); 924 } 925 926 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 927 unsigned long expire_at) 928 { 929 timer_reduce(&conn->timer, expire_at); 930 } 931 932 /* 933 * conn_service.c 934 */ 935 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 936 struct sk_buff *); 937 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 938 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 939 const struct rxrpc_security *, struct sk_buff *); 940 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 941 942 /* 943 * input.c 944 */ 945 int rxrpc_input_packet(struct sock *, struct sk_buff *); 946 947 /* 948 * insecure.c 949 */ 950 extern const struct rxrpc_security rxrpc_no_security; 951 952 /* 953 * key.c 954 */ 955 extern struct key_type key_type_rxrpc; 956 957 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 958 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 959 u32); 960 961 /* 962 * local_event.c 963 */ 964 extern void rxrpc_process_local_events(struct rxrpc_local *); 965 966 /* 967 * local_object.c 968 */ 969 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 970 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 971 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 972 void rxrpc_put_local(struct rxrpc_local *); 973 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 974 void rxrpc_unuse_local(struct rxrpc_local *); 975 void rxrpc_queue_local(struct rxrpc_local *); 976 void rxrpc_destroy_all_locals(struct rxrpc_net *); 977 978 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 979 { 980 return atomic_dec_return(&local->active_users) == 0; 981 } 982 983 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 984 { 985 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 986 } 987 988 /* 989 * misc.c 990 */ 991 extern unsigned int rxrpc_max_backlog __read_mostly; 992 extern unsigned long rxrpc_soft_ack_delay; 993 extern unsigned long rxrpc_idle_ack_delay; 994 extern unsigned int rxrpc_rx_window_size; 995 extern unsigned int rxrpc_rx_mtu; 996 extern unsigned int rxrpc_rx_jumbo_max; 997 998 /* 999 * net_ns.c 1000 */ 1001 extern unsigned int rxrpc_net_id; 1002 extern struct pernet_operations rxrpc_net_ops; 1003 1004 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1005 { 1006 return net_generic(net, rxrpc_net_id); 1007 } 1008 1009 /* 1010 * output.c 1011 */ 1012 void rxrpc_transmit_ack_packets(struct rxrpc_local *); 1013 int rxrpc_send_abort_packet(struct rxrpc_call *); 1014 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *); 1015 void rxrpc_reject_packets(struct rxrpc_local *); 1016 void rxrpc_send_keepalive(struct rxrpc_peer *); 1017 1018 /* 1019 * peer_event.c 1020 */ 1021 void rxrpc_error_report(struct sock *); 1022 void rxrpc_peer_keepalive_worker(struct work_struct *); 1023 1024 /* 1025 * peer_object.c 1026 */ 1027 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1028 const struct sockaddr_rxrpc *); 1029 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1030 struct sockaddr_rxrpc *, gfp_t); 1031 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1032 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1033 struct rxrpc_peer *); 1034 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1035 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1036 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1037 void rxrpc_put_peer(struct rxrpc_peer *); 1038 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1039 1040 /* 1041 * proc.c 1042 */ 1043 extern const struct seq_operations rxrpc_call_seq_ops; 1044 extern const struct seq_operations rxrpc_connection_seq_ops; 1045 extern const struct seq_operations rxrpc_peer_seq_ops; 1046 extern const struct seq_operations rxrpc_local_seq_ops; 1047 1048 /* 1049 * recvmsg.c 1050 */ 1051 void rxrpc_notify_socket(struct rxrpc_call *); 1052 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1053 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1054 bool __rxrpc_call_completed(struct rxrpc_call *); 1055 bool rxrpc_call_completed(struct rxrpc_call *); 1056 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1057 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1058 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1059 1060 /* 1061 * Abort a call due to a protocol error. 1062 */ 1063 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1064 struct sk_buff *skb, 1065 const char *eproto_why, 1066 const char *why, 1067 u32 abort_code) 1068 { 1069 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1070 1071 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1072 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1073 } 1074 1075 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1076 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1077 (abort_why), (abort_code)) 1078 1079 /* 1080 * rtt.c 1081 */ 1082 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1083 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1084 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1085 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1086 1087 /* 1088 * rxkad.c 1089 */ 1090 #ifdef CONFIG_RXKAD 1091 extern const struct rxrpc_security rxkad; 1092 #endif 1093 1094 /* 1095 * security.c 1096 */ 1097 int __init rxrpc_init_security(void); 1098 const struct rxrpc_security *rxrpc_security_lookup(u8); 1099 void rxrpc_exit_security(void); 1100 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1101 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1102 struct sk_buff *); 1103 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1104 struct sk_buff *, u32, u32); 1105 1106 /* 1107 * sendmsg.c 1108 */ 1109 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1110 1111 /* 1112 * server_key.c 1113 */ 1114 extern struct key_type key_type_rxrpc_s; 1115 1116 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1117 1118 /* 1119 * skbuff.c 1120 */ 1121 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1122 void rxrpc_packet_destructor(struct sk_buff *); 1123 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1124 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1125 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1126 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1127 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1128 void rxrpc_purge_queue(struct sk_buff_head *); 1129 1130 /* 1131 * stats.c 1132 */ 1133 int rxrpc_stats_show(struct seq_file *seq, void *v); 1134 int rxrpc_stats_clear(struct file *file, char *buf, size_t size); 1135 1136 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) 1137 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) 1138 1139 /* 1140 * sysctl.c 1141 */ 1142 #ifdef CONFIG_SYSCTL 1143 extern int __init rxrpc_sysctl_init(void); 1144 extern void rxrpc_sysctl_exit(void); 1145 #else 1146 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1147 static inline void rxrpc_sysctl_exit(void) {} 1148 #endif 1149 1150 /* 1151 * txbuf.c 1152 */ 1153 extern atomic_t rxrpc_nr_txbuf; 1154 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, 1155 gfp_t gfp); 1156 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1157 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1158 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 1159 1160 /* 1161 * utils.c 1162 */ 1163 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1164 1165 static inline bool before(u32 seq1, u32 seq2) 1166 { 1167 return (s32)(seq1 - seq2) < 0; 1168 } 1169 static inline bool before_eq(u32 seq1, u32 seq2) 1170 { 1171 return (s32)(seq1 - seq2) <= 0; 1172 } 1173 static inline bool after(u32 seq1, u32 seq2) 1174 { 1175 return (s32)(seq1 - seq2) > 0; 1176 } 1177 static inline bool after_eq(u32 seq1, u32 seq2) 1178 { 1179 return (s32)(seq1 - seq2) >= 0; 1180 } 1181 1182 /* 1183 * debug tracing 1184 */ 1185 extern unsigned int rxrpc_debug; 1186 1187 #define dbgprintk(FMT,...) \ 1188 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1189 1190 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1191 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1192 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1193 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1194 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1195 1196 1197 #if defined(__KDEBUG) 1198 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1199 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1200 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1201 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1202 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1203 1204 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1205 #define RXRPC_DEBUG_KENTER 0x01 1206 #define RXRPC_DEBUG_KLEAVE 0x02 1207 #define RXRPC_DEBUG_KDEBUG 0x04 1208 #define RXRPC_DEBUG_KPROTO 0x08 1209 #define RXRPC_DEBUG_KNET 0x10 1210 1211 #define _enter(FMT,...) \ 1212 do { \ 1213 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1214 kenter(FMT,##__VA_ARGS__); \ 1215 } while (0) 1216 1217 #define _leave(FMT,...) \ 1218 do { \ 1219 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1220 kleave(FMT,##__VA_ARGS__); \ 1221 } while (0) 1222 1223 #define _debug(FMT,...) \ 1224 do { \ 1225 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1226 kdebug(FMT,##__VA_ARGS__); \ 1227 } while (0) 1228 1229 #define _proto(FMT,...) \ 1230 do { \ 1231 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1232 kproto(FMT,##__VA_ARGS__); \ 1233 } while (0) 1234 1235 #define _net(FMT,...) \ 1236 do { \ 1237 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1238 knet(FMT,##__VA_ARGS__); \ 1239 } while (0) 1240 1241 #else 1242 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1243 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1244 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1245 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1246 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1247 #endif 1248 1249 /* 1250 * debug assertion checking 1251 */ 1252 #if 1 // defined(__KDEBUGALL) 1253 1254 #define ASSERT(X) \ 1255 do { \ 1256 if (unlikely(!(X))) { \ 1257 pr_err("Assertion failed\n"); \ 1258 BUG(); \ 1259 } \ 1260 } while (0) 1261 1262 #define ASSERTCMP(X, OP, Y) \ 1263 do { \ 1264 __typeof__(X) _x = (X); \ 1265 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1266 if (unlikely(!(_x OP _y))) { \ 1267 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1268 (unsigned long)_x, (unsigned long)_x, #OP, \ 1269 (unsigned long)_y, (unsigned long)_y); \ 1270 BUG(); \ 1271 } \ 1272 } while (0) 1273 1274 #define ASSERTIF(C, X) \ 1275 do { \ 1276 if (unlikely((C) && !(X))) { \ 1277 pr_err("Assertion failed\n"); \ 1278 BUG(); \ 1279 } \ 1280 } while (0) 1281 1282 #define ASSERTIFCMP(C, X, OP, Y) \ 1283 do { \ 1284 __typeof__(X) _x = (X); \ 1285 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1286 if (unlikely((C) && !(_x OP _y))) { \ 1287 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1288 (unsigned long)_x, (unsigned long)_x, #OP, \ 1289 (unsigned long)_y, (unsigned long)_y); \ 1290 BUG(); \ 1291 } \ 1292 } while (0) 1293 1294 #else 1295 1296 #define ASSERT(X) \ 1297 do { \ 1298 } while (0) 1299 1300 #define ASSERTCMP(X, OP, Y) \ 1301 do { \ 1302 } while (0) 1303 1304 #define ASSERTIF(C, X) \ 1305 do { \ 1306 } while (0) 1307 1308 #define ASSERTIFCMP(C, X, OP, Y) \ 1309 do { \ 1310 } while (0) 1311 1312 #endif /* __KDEBUGALL */ 1313