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