1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* AF_RXRPC internal definitions 3 * 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/atomic.h> 9 #include <linux/seqlock.h> 10 #include <linux/win_minmax.h> 11 #include <net/net_namespace.h> 12 #include <net/netns/generic.h> 13 #include <net/sock.h> 14 #include <net/af_rxrpc.h> 15 #include <keys/rxrpc-type.h> 16 #include "protocol.h" 17 18 #if 0 19 #define CHECK_SLAB_OKAY(X) \ 20 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 21 (POISON_FREE << 8 | POISON_FREE)) 22 #else 23 #define CHECK_SLAB_OKAY(X) do {} while (0) 24 #endif 25 26 #define FCRYPT_BSIZE 8 27 struct rxrpc_crypt { 28 union { 29 u8 x[FCRYPT_BSIZE]; 30 __be32 n[2]; 31 }; 32 } __attribute__((aligned(8))); 33 34 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 35 #define rxrpc_queue_delayed_work(WS,D) \ 36 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 37 38 struct key_preparsed_payload; 39 struct rxrpc_connection; 40 41 /* 42 * Mark applied to socket buffers in skb->mark. skb->priority is used 43 * to pass supplementary information. 44 */ 45 enum rxrpc_skb_mark { 46 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 47 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 48 }; 49 50 /* 51 * sk_state for RxRPC sockets 52 */ 53 enum { 54 RXRPC_UNBOUND = 0, 55 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 56 RXRPC_CLIENT_BOUND, /* client local address bound */ 57 RXRPC_SERVER_BOUND, /* server local address bound */ 58 RXRPC_SERVER_BOUND2, /* second server local address bound */ 59 RXRPC_SERVER_LISTENING, /* server listening for connections */ 60 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 61 RXRPC_CLOSE, /* socket is being closed */ 62 }; 63 64 /* 65 * Per-network namespace data. 66 */ 67 struct rxrpc_net { 68 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 69 u32 epoch; /* Local epoch for detecting local-end reset */ 70 struct list_head calls; /* List of calls active in this namespace */ 71 rwlock_t call_lock; /* Lock for ->calls */ 72 atomic_t nr_calls; /* Count of allocated calls */ 73 74 atomic_t nr_conns; 75 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 76 struct list_head service_conns; /* Service conns in this namespace */ 77 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 78 struct work_struct service_conn_reaper; 79 struct timer_list service_conn_reap_timer; 80 81 bool live; 82 83 bool kill_all_client_conns; 84 atomic_t nr_client_conns; 85 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 86 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 87 struct list_head idle_client_conns; 88 struct work_struct client_conn_reaper; 89 struct timer_list client_conn_reap_timer; 90 91 struct list_head local_endpoints; 92 struct mutex local_mutex; /* Lock for ->local_endpoints */ 93 94 DECLARE_HASHTABLE (peer_hash, 10); 95 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 96 97 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 98 u8 peer_keepalive_cursor; 99 time64_t peer_keepalive_base; 100 struct list_head peer_keepalive[32]; 101 struct list_head peer_keepalive_new; 102 struct timer_list peer_keepalive_timer; 103 struct work_struct peer_keepalive_work; 104 }; 105 106 /* 107 * Service backlog preallocation. 108 * 109 * This contains circular buffers of preallocated peers, connections and calls 110 * for incoming service calls and their head and tail pointers. This allows 111 * calls to be set up in the data_ready handler, thereby avoiding the need to 112 * shuffle packets around so much. 113 */ 114 struct rxrpc_backlog { 115 unsigned short peer_backlog_head; 116 unsigned short peer_backlog_tail; 117 unsigned short conn_backlog_head; 118 unsigned short conn_backlog_tail; 119 unsigned short call_backlog_head; 120 unsigned short call_backlog_tail; 121 #define RXRPC_BACKLOG_MAX 32 122 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 123 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 124 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 125 }; 126 127 /* 128 * RxRPC socket definition 129 */ 130 struct rxrpc_sock { 131 /* WARNING: sk has to be the first member */ 132 struct sock sk; 133 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 134 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 135 struct rxrpc_local *local; /* local endpoint */ 136 struct rxrpc_backlog *backlog; /* Preallocation for services */ 137 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 138 struct list_head sock_calls; /* List of calls owned by this socket */ 139 struct list_head to_be_accepted; /* calls awaiting acceptance */ 140 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 141 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 142 struct key *key; /* security for this socket */ 143 struct key *securities; /* list of server security descriptors */ 144 struct rb_root calls; /* User ID -> call mapping */ 145 unsigned long flags; 146 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 147 rwlock_t call_lock; /* lock for calls */ 148 u32 min_sec_level; /* minimum security level */ 149 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 150 bool exclusive; /* Exclusive connection for a client socket */ 151 u16 second_service; /* Additional service bound to the endpoint */ 152 struct { 153 /* Service upgrade information */ 154 u16 from; /* Service ID to upgrade (if not 0) */ 155 u16 to; /* service ID to upgrade to */ 156 } service_upgrade; 157 sa_family_t family; /* Protocol family created with */ 158 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 159 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 160 }; 161 162 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 163 164 /* 165 * CPU-byteorder normalised Rx packet header. 166 */ 167 struct rxrpc_host_header { 168 u32 epoch; /* client boot timestamp */ 169 u32 cid; /* connection and channel ID */ 170 u32 callNumber; /* call ID (0 for connection-level packets) */ 171 u32 seq; /* sequence number of pkt in call stream */ 172 u32 serial; /* serial number of pkt sent to network */ 173 u8 type; /* packet type */ 174 u8 flags; /* packet flags */ 175 u8 userStatus; /* app-layer defined status */ 176 u8 securityIndex; /* security protocol ID */ 177 union { 178 u16 _rsvd; /* reserved */ 179 u16 cksum; /* kerberos security checksum */ 180 }; 181 u16 serviceId; /* service ID */ 182 } __packed; 183 184 /* 185 * RxRPC socket buffer private variables 186 * - max 48 bytes (struct sk_buff::cb) 187 */ 188 struct rxrpc_skb_priv { 189 atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 190 u8 nr_subpackets; /* Number of subpackets */ 191 u8 rx_flags; /* Received packet flags */ 192 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 193 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 194 union { 195 int remain; /* amount of space remaining for next write */ 196 197 /* List of requested ACKs on subpackets */ 198 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 199 BITS_PER_LONG]; 200 }; 201 202 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 203 }; 204 205 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 206 207 /* 208 * RxRPC security module interface 209 */ 210 struct rxrpc_security { 211 const char *name; /* name of this service */ 212 u8 security_index; /* security type provided */ 213 u32 no_key_abort; /* Abort code indicating no key */ 214 215 /* Initialise a security service */ 216 int (*init)(void); 217 218 /* Clean up a security service */ 219 void (*exit)(void); 220 221 /* Parse the information from a server key */ 222 int (*preparse_server_key)(struct key_preparsed_payload *); 223 224 /* Clean up the preparse buffer after parsing a server key */ 225 void (*free_preparse_server_key)(struct key_preparsed_payload *); 226 227 /* Destroy the payload of a server key */ 228 void (*destroy_server_key)(struct key *); 229 230 /* Describe a server key */ 231 void (*describe_server_key)(const struct key *, struct seq_file *); 232 233 /* initialise a connection's security */ 234 int (*init_connection_security)(struct rxrpc_connection *, 235 struct rxrpc_key_token *); 236 237 /* Work out how much data we can store in a packet, given an estimate 238 * of the amount of data remaining. 239 */ 240 int (*how_much_data)(struct rxrpc_call *, size_t, 241 size_t *, size_t *, size_t *); 242 243 /* impose security on a packet */ 244 int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); 245 246 /* verify the security on a received packet */ 247 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 248 unsigned int, unsigned int, rxrpc_seq_t, u16); 249 250 /* Free crypto request on a call */ 251 void (*free_call_crypto)(struct rxrpc_call *); 252 253 /* Locate the data in a received packet that has been verified. */ 254 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 255 unsigned int *, unsigned int *); 256 257 /* issue a challenge */ 258 int (*issue_challenge)(struct rxrpc_connection *); 259 260 /* respond to a challenge */ 261 int (*respond_to_challenge)(struct rxrpc_connection *, 262 struct sk_buff *, 263 u32 *); 264 265 /* verify a response */ 266 int (*verify_response)(struct rxrpc_connection *, 267 struct sk_buff *, 268 u32 *); 269 270 /* clear connection security */ 271 void (*clear)(struct rxrpc_connection *); 272 }; 273 274 /* 275 * RxRPC local transport endpoint description 276 * - owned by a single AF_RXRPC socket 277 * - pointed to by transport socket struct sk_user_data 278 */ 279 struct rxrpc_local { 280 struct rcu_head rcu; 281 atomic_t active_users; /* Number of users of the local endpoint */ 282 atomic_t usage; /* Number of references to the structure */ 283 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 284 struct list_head link; 285 struct socket *socket; /* my UDP socket */ 286 struct work_struct processor; 287 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 288 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 289 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 290 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 291 struct rb_root client_bundles; /* Client connection bundles by socket params */ 292 spinlock_t client_bundles_lock; /* Lock for client_bundles */ 293 spinlock_t lock; /* access lock */ 294 rwlock_t services_lock; /* lock for services list */ 295 int debug_id; /* debug ID for printks */ 296 bool dead; 297 bool service_closed; /* Service socket closed */ 298 struct sockaddr_rxrpc srx; /* local address */ 299 }; 300 301 /* 302 * RxRPC remote transport endpoint definition 303 * - matched by local endpoint, remote port, address and protocol type 304 */ 305 struct rxrpc_peer { 306 struct rcu_head rcu; /* This must be first */ 307 atomic_t usage; 308 unsigned long hash_key; 309 struct hlist_node hash_link; 310 struct rxrpc_local *local; 311 struct hlist_head error_targets; /* targets for net error distribution */ 312 struct rb_root service_conns; /* Service connections */ 313 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 314 time64_t last_tx_at; /* Last time packet sent here */ 315 seqlock_t service_conn_lock; 316 spinlock_t lock; /* access lock */ 317 unsigned int if_mtu; /* interface MTU for this peer */ 318 unsigned int mtu; /* network MTU for this peer */ 319 unsigned int maxdata; /* data size (MTU - hdrsize) */ 320 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 321 int debug_id; /* debug ID for printks */ 322 struct sockaddr_rxrpc srx; /* remote address */ 323 324 /* calculated RTT cache */ 325 #define RXRPC_RTT_CACHE_SIZE 32 326 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 327 ktime_t rtt_last_req; /* Time of last RTT request */ 328 unsigned int rtt_count; /* Number of samples we've got */ 329 330 u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 331 u32 mdev_us; /* medium deviation */ 332 u32 mdev_max_us; /* maximal mdev for the last rtt period */ 333 u32 rttvar_us; /* smoothed mdev_max */ 334 u32 rto_j; /* Retransmission timeout in jiffies */ 335 u8 backoff; /* Backoff timeout */ 336 337 u8 cong_cwnd; /* Congestion window size */ 338 }; 339 340 /* 341 * Keys for matching a connection. 342 */ 343 struct rxrpc_conn_proto { 344 union { 345 struct { 346 u32 epoch; /* epoch of this connection */ 347 u32 cid; /* connection ID */ 348 }; 349 u64 index_key; 350 }; 351 }; 352 353 struct rxrpc_conn_parameters { 354 struct rxrpc_local *local; /* Representation of local endpoint */ 355 struct rxrpc_peer *peer; /* Remote endpoint */ 356 struct key *key; /* Security details */ 357 bool exclusive; /* T if conn is exclusive */ 358 bool upgrade; /* T if service ID can be upgraded */ 359 u16 service_id; /* Service ID for this connection */ 360 u32 security_level; /* Security level selected */ 361 }; 362 363 /* 364 * Bits in the connection flags. 365 */ 366 enum rxrpc_conn_flag { 367 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 368 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 369 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 370 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 371 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 372 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 373 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 374 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 375 }; 376 377 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 378 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 379 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 380 (1UL << RXRPC_CONN_FINAL_ACK_3)) 381 382 /* 383 * Events that can be raised upon a connection. 384 */ 385 enum rxrpc_conn_event { 386 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 387 }; 388 389 /* 390 * The connection protocol state. 391 */ 392 enum rxrpc_conn_proto_state { 393 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 394 RXRPC_CONN_CLIENT, /* Client connection */ 395 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 396 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 397 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 398 RXRPC_CONN_SERVICE, /* Service secured connection */ 399 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 400 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 401 RXRPC_CONN__NR_STATES 402 }; 403 404 /* 405 * RxRPC client connection bundle. 406 */ 407 struct rxrpc_bundle { 408 struct rxrpc_conn_parameters params; 409 atomic_t usage; 410 unsigned int debug_id; 411 bool try_upgrade; /* True if the bundle is attempting upgrade */ 412 bool alloc_conn; /* True if someone's getting a conn */ 413 short alloc_error; /* Error from last conn allocation */ 414 spinlock_t channel_lock; 415 struct rb_node local_node; /* Node in local->client_conns */ 416 struct list_head waiting_calls; /* Calls waiting for channels */ 417 unsigned long avail_chans; /* Mask of available channels */ 418 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 419 }; 420 421 /* 422 * RxRPC connection definition 423 * - matched by { local, peer, epoch, conn_id, direction } 424 * - each connection can only handle four simultaneous calls 425 */ 426 struct rxrpc_connection { 427 struct rxrpc_conn_proto proto; 428 struct rxrpc_conn_parameters params; 429 430 atomic_t usage; 431 struct rcu_head rcu; 432 struct list_head cache_link; 433 434 unsigned char act_chans; /* Mask of active channels */ 435 struct rxrpc_channel { 436 unsigned long final_ack_at; /* Time at which to issue final ACK */ 437 struct rxrpc_call __rcu *call; /* Active call */ 438 unsigned int call_debug_id; /* call->debug_id */ 439 u32 call_id; /* ID of current call */ 440 u32 call_counter; /* Call ID counter */ 441 u32 last_call; /* ID of last call */ 442 u8 last_type; /* Type of last packet */ 443 union { 444 u32 last_seq; 445 u32 last_abort; 446 }; 447 } channels[RXRPC_MAXCALLS]; 448 449 struct timer_list timer; /* Conn event timer */ 450 struct work_struct processor; /* connection event processor */ 451 struct rxrpc_bundle *bundle; /* Client connection bundle */ 452 struct rb_node service_node; /* Node in peer->service_conns */ 453 struct list_head proc_link; /* link in procfs list */ 454 struct list_head link; /* link in master connection list */ 455 struct sk_buff_head rx_queue; /* received conn-level packets */ 456 457 const struct rxrpc_security *security; /* applied security module */ 458 union { 459 struct { 460 struct crypto_sync_skcipher *cipher; /* encryption handle */ 461 struct rxrpc_crypt csum_iv; /* packet checksum base */ 462 u32 nonce; /* response re-use preventer */ 463 } rxkad; 464 }; 465 unsigned long flags; 466 unsigned long events; 467 unsigned long idle_timestamp; /* Time at which last became idle */ 468 spinlock_t state_lock; /* state-change lock */ 469 enum rxrpc_conn_proto_state state; /* current state of connection */ 470 u32 abort_code; /* Abort code of connection abort */ 471 int debug_id; /* debug ID for printks */ 472 atomic_t serial; /* packet serial number counter */ 473 unsigned int hi_serial; /* highest serial number received */ 474 u32 service_id; /* Service ID, possibly upgraded */ 475 u8 security_ix; /* security type */ 476 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 477 u8 bundle_shift; /* Index into bundle->avail_chans */ 478 short error; /* Local error code */ 479 }; 480 481 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 482 { 483 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 484 } 485 486 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 487 { 488 return !rxrpc_to_server(sp); 489 } 490 491 /* 492 * Flags in call->flags. 493 */ 494 enum rxrpc_call_flag { 495 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 496 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 497 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 498 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 499 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 500 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 501 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 502 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 503 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 504 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 505 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 506 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 507 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 508 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 509 }; 510 511 /* 512 * Events that can be raised on a call. 513 */ 514 enum rxrpc_call_event { 515 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 516 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 517 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 518 RXRPC_CALL_EV_PING, /* Ping send required */ 519 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 520 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 521 }; 522 523 /* 524 * The states that a call can be in. 525 */ 526 enum rxrpc_call_state { 527 RXRPC_CALL_UNINITIALISED, 528 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 529 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 530 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 531 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 532 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 533 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 534 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 535 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 536 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 537 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 538 RXRPC_CALL_COMPLETE, /* - call complete */ 539 NR__RXRPC_CALL_STATES 540 }; 541 542 /* 543 * Call completion condition (state == RXRPC_CALL_COMPLETE). 544 */ 545 enum rxrpc_call_completion { 546 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 547 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 548 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 549 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 550 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 551 NR__RXRPC_CALL_COMPLETIONS 552 }; 553 554 /* 555 * Call Tx congestion management modes. 556 */ 557 enum rxrpc_congest_mode { 558 RXRPC_CALL_SLOW_START, 559 RXRPC_CALL_CONGEST_AVOIDANCE, 560 RXRPC_CALL_PACKET_LOSS, 561 RXRPC_CALL_FAST_RETRANSMIT, 562 NR__RXRPC_CONGEST_MODES 563 }; 564 565 /* 566 * RxRPC call definition 567 * - matched by { connection, call_id } 568 */ 569 struct rxrpc_call { 570 struct rcu_head rcu; 571 struct rxrpc_connection *conn; /* connection carrying call */ 572 struct rxrpc_peer *peer; /* Peer record for remote address */ 573 struct rxrpc_sock __rcu *socket; /* socket responsible */ 574 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 575 const struct rxrpc_security *security; /* applied security module */ 576 struct mutex user_mutex; /* User access mutex */ 577 unsigned long ack_at; /* When deferred ACK needs to happen */ 578 unsigned long ack_lost_at; /* When ACK is figured as lost */ 579 unsigned long resend_at; /* When next resend needs to happen */ 580 unsigned long ping_at; /* When next to send a ping */ 581 unsigned long keepalive_at; /* When next to send a keepalive ping */ 582 unsigned long expect_rx_by; /* When we expect to get a packet by */ 583 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 584 unsigned long expect_term_by; /* When we expect call termination by */ 585 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 586 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 587 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 588 struct timer_list timer; /* Combined event timer */ 589 struct work_struct processor; /* Event processor */ 590 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 591 struct list_head link; /* link in master call list */ 592 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 593 struct hlist_node error_link; /* link in error distribution list */ 594 struct list_head accept_link; /* Link in rx->acceptq */ 595 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 596 struct list_head sock_link; /* Link in rx->sock_calls */ 597 struct rb_node sock_node; /* Node in rx->calls */ 598 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 599 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 600 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 601 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 602 unsigned long user_call_ID; /* user-defined call ID */ 603 unsigned long flags; 604 unsigned long events; 605 spinlock_t lock; 606 spinlock_t notify_lock; /* Kernel notification lock */ 607 rwlock_t state_lock; /* lock for state transition */ 608 u32 abort_code; /* Local/remote abort code */ 609 int error; /* Local error incurred */ 610 enum rxrpc_call_state state; /* current state of call */ 611 enum rxrpc_call_completion completion; /* Call completion condition */ 612 atomic_t usage; 613 u16 service_id; /* service ID */ 614 u8 security_ix; /* Security type */ 615 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 616 u32 call_id; /* call ID on connection */ 617 u32 cid; /* connection ID plus channel index */ 618 int debug_id; /* debug ID for printks */ 619 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 620 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 621 bool rx_pkt_last; /* Current recvmsg packet is last */ 622 623 /* Rx/Tx circular buffer, depending on phase. 624 * 625 * In the Rx phase, packets are annotated with 0 or the number of the 626 * segment of a jumbo packet each buffer refers to. There can be up to 627 * 47 segments in a maximum-size UDP packet. 628 * 629 * In the Tx phase, packets are annotated with which buffers have been 630 * acked. 631 */ 632 #define RXRPC_RXTX_BUFF_SIZE 64 633 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 634 #define RXRPC_INIT_RX_WINDOW_SIZE 63 635 struct sk_buff **rxtx_buffer; 636 u8 *rxtx_annotations; 637 #define RXRPC_TX_ANNO_ACK 0 638 #define RXRPC_TX_ANNO_UNACK 1 639 #define RXRPC_TX_ANNO_NAK 2 640 #define RXRPC_TX_ANNO_RETRANS 3 641 #define RXRPC_TX_ANNO_MASK 0x03 642 #define RXRPC_TX_ANNO_LAST 0x04 643 #define RXRPC_TX_ANNO_RESENT 0x08 644 645 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 646 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 647 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 648 * not hard-ACK'd packet follows this. 649 */ 650 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 651 u16 tx_backoff; /* Delay to insert due to Tx failure */ 652 653 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 654 * is fixed, we keep these numbers in terms of segments (ie. DATA 655 * packets) rather than bytes. 656 */ 657 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 658 u8 cong_cwnd; /* Congestion window size */ 659 u8 cong_extra; /* Extra to send for congestion management */ 660 u8 cong_ssthresh; /* Slow-start threshold */ 661 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 662 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 663 u8 cong_cumul_acks; /* Cumulative ACK count */ 664 ktime_t cong_tstamp; /* Last time cwnd was changed */ 665 666 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 667 * consumed packet follows this. 668 */ 669 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 670 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 671 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 672 u8 rx_winsize; /* Size of Rx window */ 673 u8 tx_winsize; /* Maximum size of Tx window */ 674 bool tx_phase; /* T if transmission phase, F if receive phase */ 675 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 676 677 spinlock_t input_lock; /* Lock for packet input to this call */ 678 679 /* receive-phase ACK management */ 680 u8 ackr_reason; /* reason to ACK */ 681 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 682 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 683 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 684 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 685 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 686 687 /* RTT management */ 688 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 689 ktime_t rtt_sent_at[4]; /* Time packet sent */ 690 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 691 * Mask of pending samples in 8-11 */ 692 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 693 #define RXRPC_CALL_RTT_PEND_SHIFT 8 694 695 /* transmission-phase ACK management */ 696 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 697 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 698 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 699 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 700 }; 701 702 /* 703 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 704 */ 705 struct rxrpc_ack_summary { 706 u8 ack_reason; 707 u8 nr_acks; /* Number of ACKs in packet */ 708 u8 nr_nacks; /* Number of NACKs in packet */ 709 u8 nr_new_acks; /* Number of new ACKs in packet */ 710 u8 nr_new_nacks; /* Number of new NACKs in packet */ 711 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 712 bool new_low_nack; /* T if new low NACK found */ 713 bool retrans_timeo; /* T if reTx due to timeout happened */ 714 u8 flight_size; /* Number of unreceived transmissions */ 715 /* Place to stash values for tracing */ 716 enum rxrpc_congest_mode mode:8; 717 u8 cwnd; 718 u8 ssthresh; 719 u8 dup_acks; 720 u8 cumulative_acks; 721 }; 722 723 /* 724 * sendmsg() cmsg-specified parameters. 725 */ 726 enum rxrpc_command { 727 RXRPC_CMD_SEND_DATA, /* send data message */ 728 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 729 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 730 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 731 }; 732 733 struct rxrpc_call_params { 734 s64 tx_total_len; /* Total Tx data length (if send data) */ 735 unsigned long user_call_ID; /* User's call ID */ 736 struct { 737 u32 hard; /* Maximum lifetime (sec) */ 738 u32 idle; /* Max time since last data packet (msec) */ 739 u32 normal; /* Max time since last call packet (msec) */ 740 } timeouts; 741 u8 nr_timeouts; /* Number of timeouts specified */ 742 bool kernel; /* T if kernel is making the call */ 743 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 744 }; 745 746 struct rxrpc_send_params { 747 struct rxrpc_call_params call; 748 u32 abort_code; /* Abort code to Tx (if abort) */ 749 enum rxrpc_command command : 8; /* The command to implement */ 750 bool exclusive; /* Shared or exclusive call */ 751 bool upgrade; /* If the connection is upgradeable */ 752 }; 753 754 #include <trace/events/rxrpc.h> 755 756 /* 757 * af_rxrpc.c 758 */ 759 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 760 extern struct workqueue_struct *rxrpc_workqueue; 761 762 /* 763 * call_accept.c 764 */ 765 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 766 void rxrpc_discard_prealloc(struct rxrpc_sock *); 767 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 768 struct rxrpc_sock *, 769 struct sk_buff *); 770 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 771 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 772 773 /* 774 * call_event.c 775 */ 776 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 777 enum rxrpc_propose_ack_trace); 778 void rxrpc_process_call(struct work_struct *); 779 780 void rxrpc_reduce_call_timer(struct rxrpc_call *call, 781 unsigned long expire_at, 782 unsigned long now, 783 enum rxrpc_timer_trace why); 784 785 void rxrpc_delete_call_timer(struct rxrpc_call *call); 786 787 /* 788 * call_object.c 789 */ 790 extern const char *const rxrpc_call_states[]; 791 extern const char *const rxrpc_call_completions[]; 792 extern unsigned int rxrpc_max_call_lifetime; 793 extern struct kmem_cache *rxrpc_call_jar; 794 795 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 796 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 797 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 798 struct rxrpc_conn_parameters *, 799 struct sockaddr_rxrpc *, 800 struct rxrpc_call_params *, gfp_t, 801 unsigned int); 802 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 803 struct sk_buff *); 804 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 805 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 806 bool __rxrpc_queue_call(struct rxrpc_call *); 807 bool rxrpc_queue_call(struct rxrpc_call *); 808 void rxrpc_see_call(struct rxrpc_call *); 809 bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 810 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 811 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 812 void rxrpc_cleanup_call(struct rxrpc_call *); 813 void rxrpc_destroy_all_calls(struct rxrpc_net *); 814 815 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 816 { 817 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 818 } 819 820 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 821 { 822 return !rxrpc_is_service_call(call); 823 } 824 825 /* 826 * conn_client.c 827 */ 828 extern unsigned int rxrpc_reap_client_connections; 829 extern unsigned long rxrpc_conn_idle_client_expiry; 830 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 831 extern struct idr rxrpc_client_conn_ids; 832 833 void rxrpc_destroy_client_conn_ids(void); 834 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 835 void rxrpc_put_bundle(struct rxrpc_bundle *); 836 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 837 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 838 gfp_t); 839 void rxrpc_expose_client_call(struct rxrpc_call *); 840 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 841 void rxrpc_put_client_conn(struct rxrpc_connection *); 842 void rxrpc_discard_expired_client_conns(struct work_struct *); 843 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 844 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 845 846 /* 847 * conn_event.c 848 */ 849 void rxrpc_process_connection(struct work_struct *); 850 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 851 852 /* 853 * conn_object.c 854 */ 855 extern unsigned int rxrpc_connection_expiry; 856 extern unsigned int rxrpc_closed_conn_expiry; 857 858 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 859 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 860 struct sk_buff *, 861 struct rxrpc_peer **); 862 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 863 void rxrpc_disconnect_call(struct rxrpc_call *); 864 void rxrpc_kill_connection(struct rxrpc_connection *); 865 bool rxrpc_queue_conn(struct rxrpc_connection *); 866 void rxrpc_see_connection(struct rxrpc_connection *); 867 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 868 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 869 void rxrpc_put_service_conn(struct rxrpc_connection *); 870 void rxrpc_service_connection_reaper(struct work_struct *); 871 void rxrpc_destroy_all_connections(struct rxrpc_net *); 872 873 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 874 { 875 return conn->out_clientflag; 876 } 877 878 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 879 { 880 return !rxrpc_conn_is_client(conn); 881 } 882 883 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 884 { 885 if (!conn) 886 return; 887 888 if (rxrpc_conn_is_client(conn)) 889 rxrpc_put_client_conn(conn); 890 else 891 rxrpc_put_service_conn(conn); 892 } 893 894 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 895 unsigned long expire_at) 896 { 897 timer_reduce(&conn->timer, expire_at); 898 } 899 900 /* 901 * conn_service.c 902 */ 903 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 904 struct sk_buff *); 905 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 906 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 907 const struct rxrpc_security *, struct sk_buff *); 908 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 909 910 /* 911 * input.c 912 */ 913 int rxrpc_input_packet(struct sock *, struct sk_buff *); 914 915 /* 916 * insecure.c 917 */ 918 extern const struct rxrpc_security rxrpc_no_security; 919 920 /* 921 * key.c 922 */ 923 extern struct key_type key_type_rxrpc; 924 925 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 926 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 927 u32); 928 929 /* 930 * local_event.c 931 */ 932 extern void rxrpc_process_local_events(struct rxrpc_local *); 933 934 /* 935 * local_object.c 936 */ 937 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 938 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 939 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 940 void rxrpc_put_local(struct rxrpc_local *); 941 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 942 void rxrpc_unuse_local(struct rxrpc_local *); 943 void rxrpc_queue_local(struct rxrpc_local *); 944 void rxrpc_destroy_all_locals(struct rxrpc_net *); 945 946 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 947 { 948 return atomic_dec_return(&local->active_users) == 0; 949 } 950 951 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 952 { 953 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 954 } 955 956 /* 957 * misc.c 958 */ 959 extern unsigned int rxrpc_max_backlog __read_mostly; 960 extern unsigned long rxrpc_requested_ack_delay; 961 extern unsigned long rxrpc_soft_ack_delay; 962 extern unsigned long rxrpc_idle_ack_delay; 963 extern unsigned int rxrpc_rx_window_size; 964 extern unsigned int rxrpc_rx_mtu; 965 extern unsigned int rxrpc_rx_jumbo_max; 966 967 extern const s8 rxrpc_ack_priority[]; 968 969 /* 970 * net_ns.c 971 */ 972 extern unsigned int rxrpc_net_id; 973 extern struct pernet_operations rxrpc_net_ops; 974 975 static inline struct rxrpc_net *rxrpc_net(struct net *net) 976 { 977 return net_generic(net, rxrpc_net_id); 978 } 979 980 /* 981 * output.c 982 */ 983 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 984 int rxrpc_send_abort_packet(struct rxrpc_call *); 985 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 986 void rxrpc_reject_packets(struct rxrpc_local *); 987 void rxrpc_send_keepalive(struct rxrpc_peer *); 988 989 /* 990 * peer_event.c 991 */ 992 void rxrpc_error_report(struct sock *); 993 void rxrpc_peer_keepalive_worker(struct work_struct *); 994 995 /* 996 * peer_object.c 997 */ 998 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 999 const struct sockaddr_rxrpc *); 1000 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1001 struct sockaddr_rxrpc *, gfp_t); 1002 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1003 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1004 struct rxrpc_peer *); 1005 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1006 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1007 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1008 void rxrpc_put_peer(struct rxrpc_peer *); 1009 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1010 1011 /* 1012 * proc.c 1013 */ 1014 extern const struct seq_operations rxrpc_call_seq_ops; 1015 extern const struct seq_operations rxrpc_connection_seq_ops; 1016 extern const struct seq_operations rxrpc_peer_seq_ops; 1017 1018 /* 1019 * recvmsg.c 1020 */ 1021 void rxrpc_notify_socket(struct rxrpc_call *); 1022 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1023 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1024 bool __rxrpc_call_completed(struct rxrpc_call *); 1025 bool rxrpc_call_completed(struct rxrpc_call *); 1026 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1027 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1028 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1029 1030 /* 1031 * Abort a call due to a protocol error. 1032 */ 1033 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1034 struct sk_buff *skb, 1035 const char *eproto_why, 1036 const char *why, 1037 u32 abort_code) 1038 { 1039 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1040 1041 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1042 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1043 } 1044 1045 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1046 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1047 (abort_why), (abort_code)) 1048 1049 /* 1050 * rtt.c 1051 */ 1052 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1053 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1054 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1055 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1056 1057 /* 1058 * rxkad.c 1059 */ 1060 #ifdef CONFIG_RXKAD 1061 extern const struct rxrpc_security rxkad; 1062 #endif 1063 1064 /* 1065 * security.c 1066 */ 1067 int __init rxrpc_init_security(void); 1068 const struct rxrpc_security *rxrpc_security_lookup(u8); 1069 void rxrpc_exit_security(void); 1070 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1071 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1072 struct sk_buff *); 1073 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1074 struct sk_buff *, u32, u32); 1075 1076 /* 1077 * sendmsg.c 1078 */ 1079 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1080 1081 /* 1082 * server_key.c 1083 */ 1084 extern struct key_type key_type_rxrpc_s; 1085 1086 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1087 1088 /* 1089 * skbuff.c 1090 */ 1091 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1092 void rxrpc_packet_destructor(struct sk_buff *); 1093 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1094 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1095 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1096 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1097 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1098 void rxrpc_purge_queue(struct sk_buff_head *); 1099 1100 /* 1101 * sysctl.c 1102 */ 1103 #ifdef CONFIG_SYSCTL 1104 extern int __init rxrpc_sysctl_init(void); 1105 extern void rxrpc_sysctl_exit(void); 1106 #else 1107 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1108 static inline void rxrpc_sysctl_exit(void) {} 1109 #endif 1110 1111 /* 1112 * utils.c 1113 */ 1114 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1115 1116 static inline bool before(u32 seq1, u32 seq2) 1117 { 1118 return (s32)(seq1 - seq2) < 0; 1119 } 1120 static inline bool before_eq(u32 seq1, u32 seq2) 1121 { 1122 return (s32)(seq1 - seq2) <= 0; 1123 } 1124 static inline bool after(u32 seq1, u32 seq2) 1125 { 1126 return (s32)(seq1 - seq2) > 0; 1127 } 1128 static inline bool after_eq(u32 seq1, u32 seq2) 1129 { 1130 return (s32)(seq1 - seq2) >= 0; 1131 } 1132 1133 /* 1134 * debug tracing 1135 */ 1136 extern unsigned int rxrpc_debug; 1137 1138 #define dbgprintk(FMT,...) \ 1139 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1140 1141 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1142 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1143 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1144 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1145 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1146 1147 1148 #if defined(__KDEBUG) 1149 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1150 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1151 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1152 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1153 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1154 1155 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1156 #define RXRPC_DEBUG_KENTER 0x01 1157 #define RXRPC_DEBUG_KLEAVE 0x02 1158 #define RXRPC_DEBUG_KDEBUG 0x04 1159 #define RXRPC_DEBUG_KPROTO 0x08 1160 #define RXRPC_DEBUG_KNET 0x10 1161 1162 #define _enter(FMT,...) \ 1163 do { \ 1164 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1165 kenter(FMT,##__VA_ARGS__); \ 1166 } while (0) 1167 1168 #define _leave(FMT,...) \ 1169 do { \ 1170 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1171 kleave(FMT,##__VA_ARGS__); \ 1172 } while (0) 1173 1174 #define _debug(FMT,...) \ 1175 do { \ 1176 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1177 kdebug(FMT,##__VA_ARGS__); \ 1178 } while (0) 1179 1180 #define _proto(FMT,...) \ 1181 do { \ 1182 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1183 kproto(FMT,##__VA_ARGS__); \ 1184 } while (0) 1185 1186 #define _net(FMT,...) \ 1187 do { \ 1188 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1189 knet(FMT,##__VA_ARGS__); \ 1190 } while (0) 1191 1192 #else 1193 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1194 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1195 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1196 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1197 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1198 #endif 1199 1200 /* 1201 * debug assertion checking 1202 */ 1203 #if 1 // defined(__KDEBUGALL) 1204 1205 #define ASSERT(X) \ 1206 do { \ 1207 if (unlikely(!(X))) { \ 1208 pr_err("Assertion failed\n"); \ 1209 BUG(); \ 1210 } \ 1211 } while (0) 1212 1213 #define ASSERTCMP(X, OP, Y) \ 1214 do { \ 1215 __typeof__(X) _x = (X); \ 1216 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1217 if (unlikely(!(_x OP _y))) { \ 1218 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1219 (unsigned long)_x, (unsigned long)_x, #OP, \ 1220 (unsigned long)_y, (unsigned long)_y); \ 1221 BUG(); \ 1222 } \ 1223 } while (0) 1224 1225 #define ASSERTIF(C, X) \ 1226 do { \ 1227 if (unlikely((C) && !(X))) { \ 1228 pr_err("Assertion failed\n"); \ 1229 BUG(); \ 1230 } \ 1231 } while (0) 1232 1233 #define ASSERTIFCMP(C, X, OP, Y) \ 1234 do { \ 1235 __typeof__(X) _x = (X); \ 1236 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1237 if (unlikely((C) && !(_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 #else 1246 1247 #define ASSERT(X) \ 1248 do { \ 1249 } while (0) 1250 1251 #define ASSERTCMP(X, OP, Y) \ 1252 do { \ 1253 } while (0) 1254 1255 #define ASSERTIF(C, X) \ 1256 do { \ 1257 } while (0) 1258 1259 #define ASSERTIFCMP(C, X, OP, Y) \ 1260 do { \ 1261 } while (0) 1262 1263 #endif /* __KDEBUGALL */ 1264