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 33 /* 34 * Mark applied to socket buffers in skb->mark. skb->priority is used 35 * to pass supplementary information. 36 */ 37 enum rxrpc_skb_mark { 38 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 39 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 40 }; 41 42 /* 43 * sk_state for RxRPC sockets 44 */ 45 enum { 46 RXRPC_UNBOUND = 0, 47 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 48 RXRPC_CLIENT_BOUND, /* client local address bound */ 49 RXRPC_SERVER_BOUND, /* server local address bound */ 50 RXRPC_SERVER_BOUND2, /* second server local address bound */ 51 RXRPC_SERVER_LISTENING, /* server listening for connections */ 52 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 53 RXRPC_CLOSE, /* socket is being closed */ 54 }; 55 56 /* 57 * Per-network namespace data. 58 */ 59 struct rxrpc_net { 60 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 61 u32 epoch; /* Local epoch for detecting local-end reset */ 62 struct list_head calls; /* List of calls active in this namespace */ 63 spinlock_t call_lock; /* Lock for ->calls */ 64 atomic_t nr_calls; /* Count of allocated calls */ 65 66 atomic_t nr_conns; 67 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 68 struct list_head service_conns; /* Service conns in this namespace */ 69 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 70 struct work_struct service_conn_reaper; 71 struct timer_list service_conn_reap_timer; 72 73 bool live; 74 75 bool kill_all_client_conns; 76 atomic_t nr_client_conns; 77 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 78 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 79 struct list_head idle_client_conns; 80 struct work_struct client_conn_reaper; 81 struct timer_list client_conn_reap_timer; 82 83 struct hlist_head local_endpoints; 84 struct mutex local_mutex; /* Lock for ->local_endpoints */ 85 86 DECLARE_HASHTABLE (peer_hash, 10); 87 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 88 89 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 90 u8 peer_keepalive_cursor; 91 time64_t peer_keepalive_base; 92 struct list_head peer_keepalive[32]; 93 struct list_head peer_keepalive_new; 94 struct timer_list peer_keepalive_timer; 95 struct work_struct peer_keepalive_work; 96 97 atomic_t stat_tx_data; 98 atomic_t stat_tx_data_retrans; 99 atomic_t stat_tx_data_send; 100 atomic_t stat_tx_data_send_frag; 101 atomic_t stat_rx_data; 102 atomic_t stat_rx_data_reqack; 103 atomic_t stat_rx_data_jumbo; 104 105 atomic_t stat_tx_ack_fill; 106 atomic_t stat_tx_ack_send; 107 atomic_t stat_tx_ack_skip; 108 atomic_t stat_tx_acks[256]; 109 atomic_t stat_rx_acks[256]; 110 111 atomic_t stat_why_req_ack[8]; 112 }; 113 114 /* 115 * Service backlog preallocation. 116 * 117 * This contains circular buffers of preallocated peers, connections and calls 118 * for incoming service calls and their head and tail pointers. This allows 119 * calls to be set up in the data_ready handler, thereby avoiding the need to 120 * shuffle packets around so much. 121 */ 122 struct rxrpc_backlog { 123 unsigned short peer_backlog_head; 124 unsigned short peer_backlog_tail; 125 unsigned short conn_backlog_head; 126 unsigned short conn_backlog_tail; 127 unsigned short call_backlog_head; 128 unsigned short call_backlog_tail; 129 #define RXRPC_BACKLOG_MAX 32 130 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 131 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 132 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 133 }; 134 135 /* 136 * RxRPC socket definition 137 */ 138 struct rxrpc_sock { 139 /* WARNING: sk has to be the first member */ 140 struct sock sk; 141 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 142 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 143 struct rxrpc_local *local; /* local endpoint */ 144 struct rxrpc_backlog *backlog; /* Preallocation for services */ 145 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 146 struct list_head sock_calls; /* List of calls owned by this socket */ 147 struct list_head to_be_accepted; /* calls awaiting acceptance */ 148 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 149 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 150 struct key *key; /* security for this socket */ 151 struct key *securities; /* list of server security descriptors */ 152 struct rb_root calls; /* User ID -> call mapping */ 153 unsigned long flags; 154 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 155 rwlock_t call_lock; /* lock for calls */ 156 u32 min_sec_level; /* minimum security level */ 157 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 158 bool exclusive; /* Exclusive connection for a client socket */ 159 u16 second_service; /* Additional service bound to the endpoint */ 160 struct { 161 /* Service upgrade information */ 162 u16 from; /* Service ID to upgrade (if not 0) */ 163 u16 to; /* service ID to upgrade to */ 164 } service_upgrade; 165 sa_family_t family; /* Protocol family created with */ 166 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 167 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 168 }; 169 170 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 171 172 /* 173 * CPU-byteorder normalised Rx packet header. 174 */ 175 struct rxrpc_host_header { 176 u32 epoch; /* client boot timestamp */ 177 u32 cid; /* connection and channel ID */ 178 u32 callNumber; /* call ID (0 for connection-level packets) */ 179 u32 seq; /* sequence number of pkt in call stream */ 180 u32 serial; /* serial number of pkt sent to network */ 181 u8 type; /* packet type */ 182 u8 flags; /* packet flags */ 183 u8 userStatus; /* app-layer defined status */ 184 u8 securityIndex; /* security protocol ID */ 185 union { 186 u16 _rsvd; /* reserved */ 187 u16 cksum; /* kerberos security checksum */ 188 }; 189 u16 serviceId; /* service ID */ 190 } __packed; 191 192 /* 193 * RxRPC socket buffer private variables 194 * - max 48 bytes (struct sk_buff::cb) 195 */ 196 struct rxrpc_skb_priv { 197 atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 198 u8 nr_subpackets; /* Number of subpackets */ 199 u8 rx_flags; /* Received packet flags */ 200 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 201 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 202 union { 203 int remain; /* amount of space remaining for next write */ 204 205 /* List of requested ACKs on subpackets */ 206 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 207 BITS_PER_LONG]; 208 }; 209 210 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 211 }; 212 213 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 214 215 /* 216 * RxRPC security module interface 217 */ 218 struct rxrpc_security { 219 const char *name; /* name of this service */ 220 u8 security_index; /* security type provided */ 221 u32 no_key_abort; /* Abort code indicating no key */ 222 223 /* Initialise a security service */ 224 int (*init)(void); 225 226 /* Clean up a security service */ 227 void (*exit)(void); 228 229 /* Parse the information from a server key */ 230 int (*preparse_server_key)(struct key_preparsed_payload *); 231 232 /* Clean up the preparse buffer after parsing a server key */ 233 void (*free_preparse_server_key)(struct key_preparsed_payload *); 234 235 /* Destroy the payload of a server key */ 236 void (*destroy_server_key)(struct key *); 237 238 /* Describe a server key */ 239 void (*describe_server_key)(const struct key *, struct seq_file *); 240 241 /* initialise a connection's security */ 242 int (*init_connection_security)(struct rxrpc_connection *, 243 struct rxrpc_key_token *); 244 245 /* Work out how much data we can store in a packet, given an estimate 246 * of the amount of data remaining. 247 */ 248 int (*how_much_data)(struct rxrpc_call *, size_t, 249 size_t *, size_t *, size_t *); 250 251 /* impose security on a packet */ 252 int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); 253 254 /* verify the security on a received packet */ 255 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 256 unsigned int, unsigned int, rxrpc_seq_t, u16); 257 258 /* Free crypto request on a call */ 259 void (*free_call_crypto)(struct rxrpc_call *); 260 261 /* Locate the data in a received packet that has been verified. */ 262 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 263 unsigned int *, unsigned int *); 264 265 /* issue a challenge */ 266 int (*issue_challenge)(struct rxrpc_connection *); 267 268 /* respond to a challenge */ 269 int (*respond_to_challenge)(struct rxrpc_connection *, 270 struct sk_buff *, 271 u32 *); 272 273 /* verify a response */ 274 int (*verify_response)(struct rxrpc_connection *, 275 struct sk_buff *, 276 u32 *); 277 278 /* clear connection security */ 279 void (*clear)(struct rxrpc_connection *); 280 }; 281 282 /* 283 * RxRPC local transport endpoint description 284 * - owned by a single AF_RXRPC socket 285 * - pointed to by transport socket struct sk_user_data 286 */ 287 struct rxrpc_local { 288 struct rcu_head rcu; 289 atomic_t active_users; /* Number of users of the local endpoint */ 290 refcount_t ref; /* Number of references to the structure */ 291 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 292 struct hlist_node link; 293 struct socket *socket; /* my UDP socket */ 294 struct work_struct processor; 295 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 296 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 297 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 298 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 299 struct rb_root client_bundles; /* Client connection bundles by socket params */ 300 spinlock_t client_bundles_lock; /* Lock for client_bundles */ 301 spinlock_t lock; /* access lock */ 302 rwlock_t services_lock; /* lock for services list */ 303 int debug_id; /* debug ID for printks */ 304 bool dead; 305 bool service_closed; /* Service socket closed */ 306 struct sockaddr_rxrpc srx; /* local address */ 307 }; 308 309 /* 310 * RxRPC remote transport endpoint definition 311 * - matched by local endpoint, remote port, address and protocol type 312 */ 313 struct rxrpc_peer { 314 struct rcu_head rcu; /* This must be first */ 315 refcount_t ref; 316 unsigned long hash_key; 317 struct hlist_node hash_link; 318 struct rxrpc_local *local; 319 struct hlist_head error_targets; /* targets for net error distribution */ 320 struct rb_root service_conns; /* Service connections */ 321 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 322 time64_t last_tx_at; /* Last time packet sent here */ 323 seqlock_t service_conn_lock; 324 spinlock_t lock; /* access lock */ 325 unsigned int if_mtu; /* interface MTU for this peer */ 326 unsigned int mtu; /* network MTU for this peer */ 327 unsigned int maxdata; /* data size (MTU - hdrsize) */ 328 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 329 int debug_id; /* debug ID for printks */ 330 struct sockaddr_rxrpc srx; /* remote address */ 331 332 /* calculated RTT cache */ 333 #define RXRPC_RTT_CACHE_SIZE 32 334 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 335 ktime_t rtt_last_req; /* Time of last RTT request */ 336 unsigned int rtt_count; /* Number of samples we've got */ 337 338 u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 339 u32 mdev_us; /* medium deviation */ 340 u32 mdev_max_us; /* maximal mdev for the last rtt period */ 341 u32 rttvar_us; /* smoothed mdev_max */ 342 u32 rto_j; /* Retransmission timeout in jiffies */ 343 u8 backoff; /* Backoff timeout */ 344 345 u8 cong_cwnd; /* Congestion window size */ 346 }; 347 348 /* 349 * Keys for matching a connection. 350 */ 351 struct rxrpc_conn_proto { 352 union { 353 struct { 354 u32 epoch; /* epoch of this connection */ 355 u32 cid; /* connection ID */ 356 }; 357 u64 index_key; 358 }; 359 }; 360 361 struct rxrpc_conn_parameters { 362 struct rxrpc_local *local; /* Representation of local endpoint */ 363 struct rxrpc_peer *peer; /* Remote endpoint */ 364 struct key *key; /* Security details */ 365 bool exclusive; /* T if conn is exclusive */ 366 bool upgrade; /* T if service ID can be upgraded */ 367 u16 service_id; /* Service ID for this connection */ 368 u32 security_level; /* Security level selected */ 369 }; 370 371 /* 372 * Bits in the connection flags. 373 */ 374 enum rxrpc_conn_flag { 375 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 376 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 377 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 378 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 379 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 380 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 381 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 382 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 383 }; 384 385 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 386 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 387 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 388 (1UL << RXRPC_CONN_FINAL_ACK_3)) 389 390 /* 391 * Events that can be raised upon a connection. 392 */ 393 enum rxrpc_conn_event { 394 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 395 }; 396 397 /* 398 * The connection protocol state. 399 */ 400 enum rxrpc_conn_proto_state { 401 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 402 RXRPC_CONN_CLIENT, /* Client connection */ 403 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 404 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 405 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 406 RXRPC_CONN_SERVICE, /* Service secured connection */ 407 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 408 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 409 RXRPC_CONN__NR_STATES 410 }; 411 412 /* 413 * RxRPC client connection bundle. 414 */ 415 struct rxrpc_bundle { 416 struct rxrpc_conn_parameters params; 417 refcount_t ref; 418 unsigned int debug_id; 419 bool try_upgrade; /* True if the bundle is attempting upgrade */ 420 bool alloc_conn; /* True if someone's getting a conn */ 421 short alloc_error; /* Error from last conn allocation */ 422 spinlock_t channel_lock; 423 struct rb_node local_node; /* Node in local->client_conns */ 424 struct list_head waiting_calls; /* Calls waiting for channels */ 425 unsigned long avail_chans; /* Mask of available channels */ 426 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 427 }; 428 429 /* 430 * RxRPC connection definition 431 * - matched by { local, peer, epoch, conn_id, direction } 432 * - each connection can only handle four simultaneous calls 433 */ 434 struct rxrpc_connection { 435 struct rxrpc_conn_proto proto; 436 struct rxrpc_conn_parameters params; 437 438 refcount_t ref; 439 struct rcu_head rcu; 440 struct list_head cache_link; 441 442 unsigned char act_chans; /* Mask of active channels */ 443 struct rxrpc_channel { 444 unsigned long final_ack_at; /* Time at which to issue final ACK */ 445 struct rxrpc_call __rcu *call; /* Active call */ 446 unsigned int call_debug_id; /* call->debug_id */ 447 u32 call_id; /* ID of current call */ 448 u32 call_counter; /* Call ID counter */ 449 u32 last_call; /* ID of last call */ 450 u8 last_type; /* Type of last packet */ 451 union { 452 u32 last_seq; 453 u32 last_abort; 454 }; 455 } channels[RXRPC_MAXCALLS]; 456 457 struct timer_list timer; /* Conn event timer */ 458 struct work_struct processor; /* connection event processor */ 459 struct rxrpc_bundle *bundle; /* Client connection bundle */ 460 struct rb_node service_node; /* Node in peer->service_conns */ 461 struct list_head proc_link; /* link in procfs list */ 462 struct list_head link; /* link in master connection list */ 463 struct sk_buff_head rx_queue; /* received conn-level packets */ 464 465 const struct rxrpc_security *security; /* applied security module */ 466 union { 467 struct { 468 struct crypto_sync_skcipher *cipher; /* encryption handle */ 469 struct rxrpc_crypt csum_iv; /* packet checksum base */ 470 u32 nonce; /* response re-use preventer */ 471 } rxkad; 472 }; 473 unsigned long flags; 474 unsigned long events; 475 unsigned long idle_timestamp; /* Time at which last became idle */ 476 spinlock_t state_lock; /* state-change lock */ 477 enum rxrpc_conn_proto_state state; /* current state of connection */ 478 u32 abort_code; /* Abort code of connection abort */ 479 int debug_id; /* debug ID for printks */ 480 atomic_t serial; /* packet serial number counter */ 481 unsigned int hi_serial; /* highest serial number received */ 482 u32 service_id; /* Service ID, possibly upgraded */ 483 u8 security_ix; /* security type */ 484 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 485 u8 bundle_shift; /* Index into bundle->avail_chans */ 486 short error; /* Local error code */ 487 }; 488 489 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 490 { 491 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 492 } 493 494 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 495 { 496 return !rxrpc_to_server(sp); 497 } 498 499 /* 500 * Flags in call->flags. 501 */ 502 enum rxrpc_call_flag { 503 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 504 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 505 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 506 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 507 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 508 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 509 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 510 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 511 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 512 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 513 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 514 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 515 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 516 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 517 }; 518 519 /* 520 * Events that can be raised on a call. 521 */ 522 enum rxrpc_call_event { 523 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 524 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 525 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 526 RXRPC_CALL_EV_PING, /* Ping send required */ 527 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 528 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 529 }; 530 531 /* 532 * The states that a call can be in. 533 */ 534 enum rxrpc_call_state { 535 RXRPC_CALL_UNINITIALISED, 536 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 537 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 538 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 539 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 540 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 541 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 542 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 543 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 544 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 545 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 546 RXRPC_CALL_COMPLETE, /* - call complete */ 547 NR__RXRPC_CALL_STATES 548 }; 549 550 /* 551 * Call completion condition (state == RXRPC_CALL_COMPLETE). 552 */ 553 enum rxrpc_call_completion { 554 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 555 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 556 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 557 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 558 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 559 NR__RXRPC_CALL_COMPLETIONS 560 }; 561 562 /* 563 * Call Tx congestion management modes. 564 */ 565 enum rxrpc_congest_mode { 566 RXRPC_CALL_SLOW_START, 567 RXRPC_CALL_CONGEST_AVOIDANCE, 568 RXRPC_CALL_PACKET_LOSS, 569 RXRPC_CALL_FAST_RETRANSMIT, 570 NR__RXRPC_CONGEST_MODES 571 }; 572 573 /* 574 * RxRPC call definition 575 * - matched by { connection, call_id } 576 */ 577 struct rxrpc_call { 578 struct rcu_head rcu; 579 struct rxrpc_connection *conn; /* connection carrying call */ 580 struct rxrpc_peer *peer; /* Peer record for remote address */ 581 struct rxrpc_sock __rcu *socket; /* socket responsible */ 582 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 583 const struct rxrpc_security *security; /* applied security module */ 584 struct mutex user_mutex; /* User access mutex */ 585 unsigned long ack_at; /* When deferred ACK needs to happen */ 586 unsigned long ack_lost_at; /* When ACK is figured as lost */ 587 unsigned long resend_at; /* When next resend needs to happen */ 588 unsigned long ping_at; /* When next to send a ping */ 589 unsigned long keepalive_at; /* When next to send a keepalive ping */ 590 unsigned long expect_rx_by; /* When we expect to get a packet by */ 591 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 592 unsigned long expect_term_by; /* When we expect call termination by */ 593 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 594 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 595 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 596 struct timer_list timer; /* Combined event timer */ 597 struct work_struct processor; /* Event processor */ 598 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 599 struct list_head link; /* link in master call list */ 600 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 601 struct hlist_node error_link; /* link in error distribution list */ 602 struct list_head accept_link; /* Link in rx->acceptq */ 603 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 604 struct list_head sock_link; /* Link in rx->sock_calls */ 605 struct rb_node sock_node; /* Node in rx->calls */ 606 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 607 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 608 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 609 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 610 unsigned long user_call_ID; /* user-defined call ID */ 611 unsigned long flags; 612 unsigned long events; 613 spinlock_t lock; 614 spinlock_t notify_lock; /* Kernel notification lock */ 615 rwlock_t state_lock; /* lock for state transition */ 616 u32 abort_code; /* Local/remote abort code */ 617 int error; /* Local error incurred */ 618 enum rxrpc_call_state state; /* current state of call */ 619 enum rxrpc_call_completion completion; /* Call completion condition */ 620 refcount_t ref; 621 u16 service_id; /* service ID */ 622 u8 security_ix; /* Security type */ 623 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 624 u32 call_id; /* call ID on connection */ 625 u32 cid; /* connection ID plus channel index */ 626 int debug_id; /* debug ID for printks */ 627 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 628 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 629 bool rx_pkt_last; /* Current recvmsg packet is last */ 630 631 /* Rx/Tx circular buffer, depending on phase. 632 * 633 * In the Rx phase, packets are annotated with 0 or the number of the 634 * segment of a jumbo packet each buffer refers to. There can be up to 635 * 47 segments in a maximum-size UDP packet. 636 * 637 * In the Tx phase, packets are annotated with which buffers have been 638 * acked. 639 */ 640 #define RXRPC_RXTX_BUFF_SIZE 64 641 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 642 #define RXRPC_INIT_RX_WINDOW_SIZE 63 643 struct sk_buff **rxtx_buffer; 644 u8 *rxtx_annotations; 645 #define RXRPC_TX_ANNO_ACK 0 646 #define RXRPC_TX_ANNO_UNACK 1 647 #define RXRPC_TX_ANNO_NAK 2 648 #define RXRPC_TX_ANNO_RETRANS 3 649 #define RXRPC_TX_ANNO_MASK 0x03 650 #define RXRPC_TX_ANNO_LAST 0x04 651 #define RXRPC_TX_ANNO_RESENT 0x08 652 653 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 654 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 655 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 656 * not hard-ACK'd packet follows this. 657 */ 658 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 659 u16 tx_backoff; /* Delay to insert due to Tx failure */ 660 661 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 662 * is fixed, we keep these numbers in terms of segments (ie. DATA 663 * packets) rather than bytes. 664 */ 665 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 666 u8 cong_cwnd; /* Congestion window size */ 667 u8 cong_extra; /* Extra to send for congestion management */ 668 u8 cong_ssthresh; /* Slow-start threshold */ 669 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 670 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 671 u8 cong_cumul_acks; /* Cumulative ACK count */ 672 ktime_t cong_tstamp; /* Last time cwnd was changed */ 673 674 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 675 * consumed packet follows this. 676 */ 677 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 678 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 679 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 680 u8 rx_winsize; /* Size of Rx window */ 681 u8 tx_winsize; /* Maximum size of Tx window */ 682 bool tx_phase; /* T if transmission phase, F if receive phase */ 683 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 684 685 spinlock_t input_lock; /* Lock for packet input to this call */ 686 687 /* Receive-phase ACK management (ACKs we send). */ 688 u8 ackr_reason; /* reason to ACK */ 689 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 690 rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */ 691 atomic_t ackr_nr_unacked; /* Number of unacked packets */ 692 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 693 694 /* RTT management */ 695 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 696 ktime_t rtt_sent_at[4]; /* Time packet sent */ 697 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 698 * Mask of pending samples in 8-11 */ 699 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 700 #define RXRPC_CALL_RTT_PEND_SHIFT 8 701 702 /* Transmission-phase ACK management (ACKs we've received). */ 703 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 704 rxrpc_seq_t acks_first_seq; /* first sequence number received */ 705 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 706 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 707 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 708 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 709 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 710 }; 711 712 /* 713 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 714 */ 715 struct rxrpc_ack_summary { 716 u8 ack_reason; 717 u8 nr_acks; /* Number of ACKs in packet */ 718 u8 nr_nacks; /* Number of NACKs in packet */ 719 u8 nr_new_acks; /* Number of new ACKs in packet */ 720 u8 nr_new_nacks; /* Number of new NACKs in packet */ 721 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 722 bool new_low_nack; /* T if new low NACK found */ 723 bool retrans_timeo; /* T if reTx due to timeout happened */ 724 u8 flight_size; /* Number of unreceived transmissions */ 725 /* Place to stash values for tracing */ 726 enum rxrpc_congest_mode mode:8; 727 u8 cwnd; 728 u8 ssthresh; 729 u8 dup_acks; 730 u8 cumulative_acks; 731 }; 732 733 /* 734 * sendmsg() cmsg-specified parameters. 735 */ 736 enum rxrpc_command { 737 RXRPC_CMD_SEND_DATA, /* send data message */ 738 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 739 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 740 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 741 }; 742 743 struct rxrpc_call_params { 744 s64 tx_total_len; /* Total Tx data length (if send data) */ 745 unsigned long user_call_ID; /* User's call ID */ 746 struct { 747 u32 hard; /* Maximum lifetime (sec) */ 748 u32 idle; /* Max time since last data packet (msec) */ 749 u32 normal; /* Max time since last call packet (msec) */ 750 } timeouts; 751 u8 nr_timeouts; /* Number of timeouts specified */ 752 bool kernel; /* T if kernel is making the call */ 753 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 754 }; 755 756 struct rxrpc_send_params { 757 struct rxrpc_call_params call; 758 u32 abort_code; /* Abort code to Tx (if abort) */ 759 enum rxrpc_command command : 8; /* The command to implement */ 760 bool exclusive; /* Shared or exclusive call */ 761 bool upgrade; /* If the connection is upgradeable */ 762 }; 763 764 #include <trace/events/rxrpc.h> 765 766 /* 767 * af_rxrpc.c 768 */ 769 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 770 extern struct workqueue_struct *rxrpc_workqueue; 771 772 /* 773 * call_accept.c 774 */ 775 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 776 void rxrpc_discard_prealloc(struct rxrpc_sock *); 777 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 778 struct rxrpc_sock *, 779 struct sk_buff *); 780 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 781 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 782 783 /* 784 * call_event.c 785 */ 786 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 787 enum rxrpc_propose_ack_trace); 788 void rxrpc_process_call(struct work_struct *); 789 790 void rxrpc_reduce_call_timer(struct rxrpc_call *call, 791 unsigned long expire_at, 792 unsigned long now, 793 enum rxrpc_timer_trace why); 794 795 void rxrpc_delete_call_timer(struct rxrpc_call *call); 796 797 /* 798 * call_object.c 799 */ 800 extern const char *const rxrpc_call_states[]; 801 extern const char *const rxrpc_call_completions[]; 802 extern struct kmem_cache *rxrpc_call_jar; 803 804 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 805 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 806 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 807 struct rxrpc_conn_parameters *, 808 struct sockaddr_rxrpc *, 809 struct rxrpc_call_params *, gfp_t, 810 unsigned int); 811 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 812 struct sk_buff *); 813 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 814 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 815 bool __rxrpc_queue_call(struct rxrpc_call *); 816 bool rxrpc_queue_call(struct rxrpc_call *); 817 void rxrpc_see_call(struct rxrpc_call *); 818 bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 819 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 820 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 821 void rxrpc_cleanup_call(struct rxrpc_call *); 822 void rxrpc_destroy_all_calls(struct rxrpc_net *); 823 824 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 825 { 826 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 827 } 828 829 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 830 { 831 return !rxrpc_is_service_call(call); 832 } 833 834 /* 835 * conn_client.c 836 */ 837 extern unsigned int rxrpc_reap_client_connections; 838 extern unsigned long rxrpc_conn_idle_client_expiry; 839 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 840 extern struct idr rxrpc_client_conn_ids; 841 842 void rxrpc_destroy_client_conn_ids(void); 843 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 844 void rxrpc_put_bundle(struct rxrpc_bundle *); 845 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 846 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 847 gfp_t); 848 void rxrpc_expose_client_call(struct rxrpc_call *); 849 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 850 void rxrpc_put_client_conn(struct rxrpc_connection *); 851 void rxrpc_discard_expired_client_conns(struct work_struct *); 852 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 853 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 854 855 /* 856 * conn_event.c 857 */ 858 void rxrpc_process_connection(struct work_struct *); 859 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 860 861 /* 862 * conn_object.c 863 */ 864 extern unsigned int rxrpc_connection_expiry; 865 extern unsigned int rxrpc_closed_conn_expiry; 866 867 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 868 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 869 struct sk_buff *, 870 struct rxrpc_peer **); 871 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 872 void rxrpc_disconnect_call(struct rxrpc_call *); 873 void rxrpc_kill_connection(struct rxrpc_connection *); 874 bool rxrpc_queue_conn(struct rxrpc_connection *); 875 void rxrpc_see_connection(struct rxrpc_connection *); 876 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 877 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 878 void rxrpc_put_service_conn(struct rxrpc_connection *); 879 void rxrpc_service_connection_reaper(struct work_struct *); 880 void rxrpc_destroy_all_connections(struct rxrpc_net *); 881 882 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 883 { 884 return conn->out_clientflag; 885 } 886 887 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 888 { 889 return !rxrpc_conn_is_client(conn); 890 } 891 892 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 893 { 894 if (!conn) 895 return; 896 897 if (rxrpc_conn_is_client(conn)) 898 rxrpc_put_client_conn(conn); 899 else 900 rxrpc_put_service_conn(conn); 901 } 902 903 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 904 unsigned long expire_at) 905 { 906 timer_reduce(&conn->timer, expire_at); 907 } 908 909 /* 910 * conn_service.c 911 */ 912 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 913 struct sk_buff *); 914 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 915 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 916 const struct rxrpc_security *, struct sk_buff *); 917 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 918 919 /* 920 * input.c 921 */ 922 int rxrpc_input_packet(struct sock *, struct sk_buff *); 923 924 /* 925 * insecure.c 926 */ 927 extern const struct rxrpc_security rxrpc_no_security; 928 929 /* 930 * key.c 931 */ 932 extern struct key_type key_type_rxrpc; 933 934 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 935 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 936 u32); 937 938 /* 939 * local_event.c 940 */ 941 extern void rxrpc_process_local_events(struct rxrpc_local *); 942 943 /* 944 * local_object.c 945 */ 946 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 947 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 948 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 949 void rxrpc_put_local(struct rxrpc_local *); 950 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 951 void rxrpc_unuse_local(struct rxrpc_local *); 952 void rxrpc_queue_local(struct rxrpc_local *); 953 void rxrpc_destroy_all_locals(struct rxrpc_net *); 954 955 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 956 { 957 return atomic_dec_return(&local->active_users) == 0; 958 } 959 960 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 961 { 962 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 963 } 964 965 /* 966 * misc.c 967 */ 968 extern unsigned int rxrpc_max_backlog __read_mostly; 969 extern unsigned long rxrpc_requested_ack_delay; 970 extern unsigned long rxrpc_soft_ack_delay; 971 extern unsigned long rxrpc_idle_ack_delay; 972 extern unsigned int rxrpc_rx_window_size; 973 extern unsigned int rxrpc_rx_mtu; 974 extern unsigned int rxrpc_rx_jumbo_max; 975 976 extern const s8 rxrpc_ack_priority[]; 977 978 /* 979 * net_ns.c 980 */ 981 extern unsigned int rxrpc_net_id; 982 extern struct pernet_operations rxrpc_net_ops; 983 984 static inline struct rxrpc_net *rxrpc_net(struct net *net) 985 { 986 return net_generic(net, rxrpc_net_id); 987 } 988 989 /* 990 * output.c 991 */ 992 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 993 int rxrpc_send_abort_packet(struct rxrpc_call *); 994 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 995 void rxrpc_reject_packets(struct rxrpc_local *); 996 void rxrpc_send_keepalive(struct rxrpc_peer *); 997 998 /* 999 * peer_event.c 1000 */ 1001 void rxrpc_encap_err_rcv(struct sock *sk, struct sk_buff *skb, unsigned int udp_offset); 1002 void rxrpc_error_report(struct sock *); 1003 void rxrpc_peer_keepalive_worker(struct work_struct *); 1004 1005 /* 1006 * peer_object.c 1007 */ 1008 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1009 const struct sockaddr_rxrpc *); 1010 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1011 struct sockaddr_rxrpc *, gfp_t); 1012 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1013 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1014 struct rxrpc_peer *); 1015 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1016 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1017 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1018 void rxrpc_put_peer(struct rxrpc_peer *); 1019 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1020 1021 /* 1022 * proc.c 1023 */ 1024 extern const struct seq_operations rxrpc_call_seq_ops; 1025 extern const struct seq_operations rxrpc_connection_seq_ops; 1026 extern const struct seq_operations rxrpc_peer_seq_ops; 1027 extern const struct seq_operations rxrpc_local_seq_ops; 1028 1029 /* 1030 * recvmsg.c 1031 */ 1032 void rxrpc_notify_socket(struct rxrpc_call *); 1033 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1034 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1035 bool __rxrpc_call_completed(struct rxrpc_call *); 1036 bool rxrpc_call_completed(struct rxrpc_call *); 1037 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1038 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1039 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1040 1041 /* 1042 * Abort a call due to a protocol error. 1043 */ 1044 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1045 struct sk_buff *skb, 1046 const char *eproto_why, 1047 const char *why, 1048 u32 abort_code) 1049 { 1050 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1051 1052 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1053 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1054 } 1055 1056 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1057 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1058 (abort_why), (abort_code)) 1059 1060 /* 1061 * rtt.c 1062 */ 1063 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1064 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1065 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1066 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1067 1068 /* 1069 * rxkad.c 1070 */ 1071 #ifdef CONFIG_RXKAD 1072 extern const struct rxrpc_security rxkad; 1073 #endif 1074 1075 /* 1076 * security.c 1077 */ 1078 int __init rxrpc_init_security(void); 1079 const struct rxrpc_security *rxrpc_security_lookup(u8); 1080 void rxrpc_exit_security(void); 1081 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1082 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1083 struct sk_buff *); 1084 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1085 struct sk_buff *, u32, u32); 1086 1087 /* 1088 * sendmsg.c 1089 */ 1090 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1091 1092 /* 1093 * server_key.c 1094 */ 1095 extern struct key_type key_type_rxrpc_s; 1096 1097 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1098 1099 /* 1100 * skbuff.c 1101 */ 1102 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1103 void rxrpc_packet_destructor(struct sk_buff *); 1104 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1105 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1106 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1107 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1108 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1109 void rxrpc_purge_queue(struct sk_buff_head *); 1110 1111 /* 1112 * stats.c 1113 */ 1114 int rxrpc_stats_show(struct seq_file *seq, void *v); 1115 int rxrpc_stats_clear(struct file *file, char *buf, size_t size); 1116 1117 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) 1118 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) 1119 1120 /* 1121 * sysctl.c 1122 */ 1123 #ifdef CONFIG_SYSCTL 1124 extern int __init rxrpc_sysctl_init(void); 1125 extern void rxrpc_sysctl_exit(void); 1126 #else 1127 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1128 static inline void rxrpc_sysctl_exit(void) {} 1129 #endif 1130 1131 /* 1132 * utils.c 1133 */ 1134 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1135 1136 static inline bool before(u32 seq1, u32 seq2) 1137 { 1138 return (s32)(seq1 - seq2) < 0; 1139 } 1140 static inline bool before_eq(u32 seq1, u32 seq2) 1141 { 1142 return (s32)(seq1 - seq2) <= 0; 1143 } 1144 static inline bool after(u32 seq1, u32 seq2) 1145 { 1146 return (s32)(seq1 - seq2) > 0; 1147 } 1148 static inline bool after_eq(u32 seq1, u32 seq2) 1149 { 1150 return (s32)(seq1 - seq2) >= 0; 1151 } 1152 1153 /* 1154 * debug tracing 1155 */ 1156 extern unsigned int rxrpc_debug; 1157 1158 #define dbgprintk(FMT,...) \ 1159 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1160 1161 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1162 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1163 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1164 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1165 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1166 1167 1168 #if defined(__KDEBUG) 1169 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1170 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1171 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1172 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1173 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1174 1175 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1176 #define RXRPC_DEBUG_KENTER 0x01 1177 #define RXRPC_DEBUG_KLEAVE 0x02 1178 #define RXRPC_DEBUG_KDEBUG 0x04 1179 #define RXRPC_DEBUG_KPROTO 0x08 1180 #define RXRPC_DEBUG_KNET 0x10 1181 1182 #define _enter(FMT,...) \ 1183 do { \ 1184 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1185 kenter(FMT,##__VA_ARGS__); \ 1186 } while (0) 1187 1188 #define _leave(FMT,...) \ 1189 do { \ 1190 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1191 kleave(FMT,##__VA_ARGS__); \ 1192 } while (0) 1193 1194 #define _debug(FMT,...) \ 1195 do { \ 1196 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1197 kdebug(FMT,##__VA_ARGS__); \ 1198 } while (0) 1199 1200 #define _proto(FMT,...) \ 1201 do { \ 1202 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1203 kproto(FMT,##__VA_ARGS__); \ 1204 } while (0) 1205 1206 #define _net(FMT,...) \ 1207 do { \ 1208 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1209 knet(FMT,##__VA_ARGS__); \ 1210 } while (0) 1211 1212 #else 1213 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1214 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1215 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1216 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1217 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1218 #endif 1219 1220 /* 1221 * debug assertion checking 1222 */ 1223 #if 1 // defined(__KDEBUGALL) 1224 1225 #define ASSERT(X) \ 1226 do { \ 1227 if (unlikely(!(X))) { \ 1228 pr_err("Assertion failed\n"); \ 1229 BUG(); \ 1230 } \ 1231 } while (0) 1232 1233 #define ASSERTCMP(X, OP, Y) \ 1234 do { \ 1235 __typeof__(X) _x = (X); \ 1236 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1237 if (unlikely(!(_x OP _y))) { \ 1238 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1239 (unsigned long)_x, (unsigned long)_x, #OP, \ 1240 (unsigned long)_y, (unsigned long)_y); \ 1241 BUG(); \ 1242 } \ 1243 } while (0) 1244 1245 #define ASSERTIF(C, X) \ 1246 do { \ 1247 if (unlikely((C) && !(X))) { \ 1248 pr_err("Assertion failed\n"); \ 1249 BUG(); \ 1250 } \ 1251 } while (0) 1252 1253 #define ASSERTIFCMP(C, X, OP, Y) \ 1254 do { \ 1255 __typeof__(X) _x = (X); \ 1256 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1257 if (unlikely((C) && !(_x OP _y))) { \ 1258 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1259 (unsigned long)_x, (unsigned long)_x, #OP, \ 1260 (unsigned long)_y, (unsigned long)_y); \ 1261 BUG(); \ 1262 } \ 1263 } while (0) 1264 1265 #else 1266 1267 #define ASSERT(X) \ 1268 do { \ 1269 } while (0) 1270 1271 #define ASSERTCMP(X, OP, Y) \ 1272 do { \ 1273 } while (0) 1274 1275 #define ASSERTIF(C, X) \ 1276 do { \ 1277 } while (0) 1278 1279 #define ASSERTIFCMP(C, X, OP, Y) \ 1280 do { \ 1281 } while (0) 1282 1283 #endif /* __KDEBUGALL */ 1284