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 <net/net_namespace.h> 11 #include <net/netns/generic.h> 12 #include <net/sock.h> 13 #include <net/af_rxrpc.h> 14 #include "protocol.h" 15 16 #if 0 17 #define CHECK_SLAB_OKAY(X) \ 18 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 19 (POISON_FREE << 8 | POISON_FREE)) 20 #else 21 #define CHECK_SLAB_OKAY(X) do {} while (0) 22 #endif 23 24 #define FCRYPT_BSIZE 8 25 struct rxrpc_crypt { 26 union { 27 u8 x[FCRYPT_BSIZE]; 28 __be32 n[2]; 29 }; 30 } __attribute__((aligned(8))); 31 32 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 33 #define rxrpc_queue_delayed_work(WS,D) \ 34 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 35 36 struct rxrpc_connection; 37 38 /* 39 * Mark applied to socket buffers in skb->mark. skb->priority is used 40 * to pass supplementary information. 41 */ 42 enum rxrpc_skb_mark { 43 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 44 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 45 }; 46 47 /* 48 * sk_state for RxRPC sockets 49 */ 50 enum { 51 RXRPC_UNBOUND = 0, 52 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 53 RXRPC_CLIENT_BOUND, /* client local address bound */ 54 RXRPC_SERVER_BOUND, /* server local address bound */ 55 RXRPC_SERVER_BOUND2, /* second server local address bound */ 56 RXRPC_SERVER_LISTENING, /* server listening for connections */ 57 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 58 RXRPC_CLOSE, /* socket is being closed */ 59 }; 60 61 /* 62 * Per-network namespace data. 63 */ 64 struct rxrpc_net { 65 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 66 u32 epoch; /* Local epoch for detecting local-end reset */ 67 struct list_head calls; /* List of calls active in this namespace */ 68 rwlock_t call_lock; /* Lock for ->calls */ 69 atomic_t nr_calls; /* Count of allocated calls */ 70 71 atomic_t nr_conns; 72 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 73 struct list_head service_conns; /* Service conns in this namespace */ 74 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 75 struct work_struct service_conn_reaper; 76 struct timer_list service_conn_reap_timer; 77 78 unsigned int nr_client_conns; 79 unsigned int nr_active_client_conns; 80 bool kill_all_client_conns; 81 bool live; 82 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 83 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 84 struct list_head waiting_client_conns; 85 struct list_head active_client_conns; 86 struct list_head idle_client_conns; 87 struct work_struct client_conn_reaper; 88 struct timer_list client_conn_reap_timer; 89 90 struct list_head local_endpoints; 91 struct mutex local_mutex; /* Lock for ->local_endpoints */ 92 93 DECLARE_HASHTABLE (peer_hash, 10); 94 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 95 96 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 97 u8 peer_keepalive_cursor; 98 time64_t peer_keepalive_base; 99 struct list_head peer_keepalive[32]; 100 struct list_head peer_keepalive_new; 101 struct timer_list peer_keepalive_timer; 102 struct work_struct peer_keepalive_work; 103 }; 104 105 /* 106 * Service backlog preallocation. 107 * 108 * This contains circular buffers of preallocated peers, connections and calls 109 * for incoming service calls and their head and tail pointers. This allows 110 * calls to be set up in the data_ready handler, thereby avoiding the need to 111 * shuffle packets around so much. 112 */ 113 struct rxrpc_backlog { 114 unsigned short peer_backlog_head; 115 unsigned short peer_backlog_tail; 116 unsigned short conn_backlog_head; 117 unsigned short conn_backlog_tail; 118 unsigned short call_backlog_head; 119 unsigned short call_backlog_tail; 120 #define RXRPC_BACKLOG_MAX 32 121 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 122 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 123 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 124 }; 125 126 /* 127 * RxRPC socket definition 128 */ 129 struct rxrpc_sock { 130 /* WARNING: sk has to be the first member */ 131 struct sock sk; 132 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 133 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 134 struct rxrpc_local *local; /* local endpoint */ 135 struct rxrpc_backlog *backlog; /* Preallocation for services */ 136 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 137 struct list_head sock_calls; /* List of calls owned by this socket */ 138 struct list_head to_be_accepted; /* calls awaiting acceptance */ 139 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 140 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 141 struct key *key; /* security for this socket */ 142 struct key *securities; /* list of server security descriptors */ 143 struct rb_root calls; /* User ID -> call mapping */ 144 unsigned long flags; 145 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 146 rwlock_t call_lock; /* lock for calls */ 147 u32 min_sec_level; /* minimum security level */ 148 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 149 bool exclusive; /* Exclusive connection for a client socket */ 150 u16 second_service; /* Additional service bound to the endpoint */ 151 struct { 152 /* Service upgrade information */ 153 u16 from; /* Service ID to upgrade (if not 0) */ 154 u16 to; /* service ID to upgrade to */ 155 } service_upgrade; 156 sa_family_t family; /* Protocol family created with */ 157 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 158 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 159 }; 160 161 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 162 163 /* 164 * CPU-byteorder normalised Rx packet header. 165 */ 166 struct rxrpc_host_header { 167 u32 epoch; /* client boot timestamp */ 168 u32 cid; /* connection and channel ID */ 169 u32 callNumber; /* call ID (0 for connection-level packets) */ 170 u32 seq; /* sequence number of pkt in call stream */ 171 u32 serial; /* serial number of pkt sent to network */ 172 u8 type; /* packet type */ 173 u8 flags; /* packet flags */ 174 u8 userStatus; /* app-layer defined status */ 175 u8 securityIndex; /* security protocol ID */ 176 union { 177 u16 _rsvd; /* reserved */ 178 u16 cksum; /* kerberos security checksum */ 179 }; 180 u16 serviceId; /* service ID */ 181 } __packed; 182 183 /* 184 * RxRPC socket buffer private variables 185 * - max 48 bytes (struct sk_buff::cb) 186 */ 187 struct rxrpc_skb_priv { 188 union { 189 u8 nr_jumbo; /* Number of jumbo subpackets */ 190 }; 191 union { 192 int remain; /* amount of space remaining for next write */ 193 }; 194 195 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 196 }; 197 198 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 199 200 /* 201 * RxRPC security module interface 202 */ 203 struct rxrpc_security { 204 const char *name; /* name of this service */ 205 u8 security_index; /* security type provided */ 206 207 /* Initialise a security service */ 208 int (*init)(void); 209 210 /* Clean up a security service */ 211 void (*exit)(void); 212 213 /* initialise a connection's security */ 214 int (*init_connection_security)(struct rxrpc_connection *); 215 216 /* prime a connection's packet security */ 217 int (*prime_packet_security)(struct rxrpc_connection *); 218 219 /* impose security on a packet */ 220 int (*secure_packet)(struct rxrpc_call *, 221 struct sk_buff *, 222 size_t, 223 void *); 224 225 /* verify the security on a received packet */ 226 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 227 unsigned int, unsigned int, rxrpc_seq_t, u16); 228 229 /* Free crypto request on a call */ 230 void (*free_call_crypto)(struct rxrpc_call *); 231 232 /* Locate the data in a received packet that has been verified. */ 233 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 234 unsigned int *, unsigned int *); 235 236 /* issue a challenge */ 237 int (*issue_challenge)(struct rxrpc_connection *); 238 239 /* respond to a challenge */ 240 int (*respond_to_challenge)(struct rxrpc_connection *, 241 struct sk_buff *, 242 u32 *); 243 244 /* verify a response */ 245 int (*verify_response)(struct rxrpc_connection *, 246 struct sk_buff *, 247 u32 *); 248 249 /* clear connection security */ 250 void (*clear)(struct rxrpc_connection *); 251 }; 252 253 /* 254 * RxRPC local transport endpoint description 255 * - owned by a single AF_RXRPC socket 256 * - pointed to by transport socket struct sk_user_data 257 */ 258 struct rxrpc_local { 259 struct rcu_head rcu; 260 atomic_t usage; 261 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 262 struct list_head link; 263 struct socket *socket; /* my UDP socket */ 264 struct work_struct processor; 265 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 266 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 267 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 268 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 269 struct rb_root client_conns; /* Client connections by socket params */ 270 spinlock_t client_conns_lock; /* Lock for client_conns */ 271 spinlock_t lock; /* access lock */ 272 rwlock_t services_lock; /* lock for services list */ 273 int debug_id; /* debug ID for printks */ 274 bool dead; 275 bool service_closed; /* Service socket closed */ 276 struct sockaddr_rxrpc srx; /* local address */ 277 }; 278 279 /* 280 * RxRPC remote transport endpoint definition 281 * - matched by local endpoint, remote port, address and protocol type 282 */ 283 struct rxrpc_peer { 284 struct rcu_head rcu; /* This must be first */ 285 atomic_t usage; 286 unsigned long hash_key; 287 struct hlist_node hash_link; 288 struct rxrpc_local *local; 289 struct hlist_head error_targets; /* targets for net error distribution */ 290 struct rb_root service_conns; /* Service connections */ 291 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 292 time64_t last_tx_at; /* Last time packet sent here */ 293 seqlock_t service_conn_lock; 294 spinlock_t lock; /* access lock */ 295 unsigned int if_mtu; /* interface MTU for this peer */ 296 unsigned int mtu; /* network MTU for this peer */ 297 unsigned int maxdata; /* data size (MTU - hdrsize) */ 298 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 299 int debug_id; /* debug ID for printks */ 300 struct sockaddr_rxrpc srx; /* remote address */ 301 302 /* calculated RTT cache */ 303 #define RXRPC_RTT_CACHE_SIZE 32 304 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 305 ktime_t rtt_last_req; /* Time of last RTT request */ 306 u64 rtt; /* Current RTT estimate (in nS) */ 307 u64 rtt_sum; /* Sum of cache contents */ 308 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 309 u8 rtt_cursor; /* next entry at which to insert */ 310 u8 rtt_usage; /* amount of cache actually used */ 311 312 u8 cong_cwnd; /* Congestion window size */ 313 }; 314 315 /* 316 * Keys for matching a connection. 317 */ 318 struct rxrpc_conn_proto { 319 union { 320 struct { 321 u32 epoch; /* epoch of this connection */ 322 u32 cid; /* connection ID */ 323 }; 324 u64 index_key; 325 }; 326 }; 327 328 struct rxrpc_conn_parameters { 329 struct rxrpc_local *local; /* Representation of local endpoint */ 330 struct rxrpc_peer *peer; /* Remote endpoint */ 331 struct key *key; /* Security details */ 332 bool exclusive; /* T if conn is exclusive */ 333 bool upgrade; /* T if service ID can be upgraded */ 334 u16 service_id; /* Service ID for this connection */ 335 u32 security_level; /* Security level selected */ 336 }; 337 338 /* 339 * Bits in the connection flags. 340 */ 341 enum rxrpc_conn_flag { 342 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 343 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 344 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 345 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 346 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 347 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 348 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 349 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 350 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 351 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 352 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 353 }; 354 355 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 356 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 357 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 358 (1UL << RXRPC_CONN_FINAL_ACK_3)) 359 360 /* 361 * Events that can be raised upon a connection. 362 */ 363 enum rxrpc_conn_event { 364 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 365 }; 366 367 /* 368 * The connection cache state. 369 */ 370 enum rxrpc_conn_cache_state { 371 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 372 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 373 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 374 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 375 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 376 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 377 RXRPC_CONN__NR_CACHE_STATES 378 }; 379 380 /* 381 * The connection protocol state. 382 */ 383 enum rxrpc_conn_proto_state { 384 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 385 RXRPC_CONN_CLIENT, /* Client connection */ 386 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 387 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 388 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 389 RXRPC_CONN_SERVICE, /* Service secured connection */ 390 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 391 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 392 RXRPC_CONN__NR_STATES 393 }; 394 395 /* 396 * RxRPC connection definition 397 * - matched by { local, peer, epoch, conn_id, direction } 398 * - each connection can only handle four simultaneous calls 399 */ 400 struct rxrpc_connection { 401 struct rxrpc_conn_proto proto; 402 struct rxrpc_conn_parameters params; 403 404 atomic_t usage; 405 struct rcu_head rcu; 406 struct list_head cache_link; 407 408 spinlock_t channel_lock; 409 unsigned char active_chans; /* Mask of active channels */ 410 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 411 struct list_head waiting_calls; /* Calls waiting for channels */ 412 struct rxrpc_channel { 413 unsigned long final_ack_at; /* Time at which to issue final ACK */ 414 struct rxrpc_call __rcu *call; /* Active call */ 415 unsigned int call_debug_id; /* call->debug_id */ 416 u32 call_id; /* ID of current call */ 417 u32 call_counter; /* Call ID counter */ 418 u32 last_call; /* ID of last call */ 419 u8 last_type; /* Type of last packet */ 420 union { 421 u32 last_seq; 422 u32 last_abort; 423 }; 424 } channels[RXRPC_MAXCALLS]; 425 426 struct timer_list timer; /* Conn event timer */ 427 struct work_struct processor; /* connection event processor */ 428 union { 429 struct rb_node client_node; /* Node in local->client_conns */ 430 struct rb_node service_node; /* Node in peer->service_conns */ 431 }; 432 struct list_head proc_link; /* link in procfs list */ 433 struct list_head link; /* link in master connection list */ 434 struct sk_buff_head rx_queue; /* received conn-level packets */ 435 const struct rxrpc_security *security; /* applied security module */ 436 struct key *server_key; /* security for this service */ 437 struct crypto_sync_skcipher *cipher; /* encryption handle */ 438 struct rxrpc_crypt csum_iv; /* packet checksum base */ 439 unsigned long flags; 440 unsigned long events; 441 unsigned long idle_timestamp; /* Time at which last became idle */ 442 spinlock_t state_lock; /* state-change lock */ 443 enum rxrpc_conn_cache_state cache_state; 444 enum rxrpc_conn_proto_state state; /* current state of connection */ 445 u32 abort_code; /* Abort code of connection abort */ 446 int debug_id; /* debug ID for printks */ 447 atomic_t serial; /* packet serial number counter */ 448 unsigned int hi_serial; /* highest serial number received */ 449 u32 security_nonce; /* response re-use preventer */ 450 u32 service_id; /* Service ID, possibly upgraded */ 451 u8 size_align; /* data size alignment (for security) */ 452 u8 security_size; /* security header size */ 453 u8 security_ix; /* security type */ 454 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 455 short error; /* Local error code */ 456 }; 457 458 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 459 { 460 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 461 } 462 463 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 464 { 465 return !rxrpc_to_server(sp); 466 } 467 468 /* 469 * Flags in call->flags. 470 */ 471 enum rxrpc_call_flag { 472 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 473 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 474 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 475 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 476 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 477 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 478 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 479 RXRPC_CALL_PINGING, /* Ping in process */ 480 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 481 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 482 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 483 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 484 RXRPC_CALL_IS_INTR, /* The call is interruptible */ 485 }; 486 487 /* 488 * Events that can be raised on a call. 489 */ 490 enum rxrpc_call_event { 491 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 492 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 493 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 494 RXRPC_CALL_EV_PING, /* Ping send required */ 495 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 496 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 497 }; 498 499 /* 500 * The states that a call can be in. 501 */ 502 enum rxrpc_call_state { 503 RXRPC_CALL_UNINITIALISED, 504 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 505 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 506 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 507 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 508 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 509 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 510 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 511 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 512 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 513 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 514 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 515 RXRPC_CALL_COMPLETE, /* - call complete */ 516 NR__RXRPC_CALL_STATES 517 }; 518 519 /* 520 * Call completion condition (state == RXRPC_CALL_COMPLETE). 521 */ 522 enum rxrpc_call_completion { 523 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 524 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 525 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 526 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 527 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 528 NR__RXRPC_CALL_COMPLETIONS 529 }; 530 531 /* 532 * Call Tx congestion management modes. 533 */ 534 enum rxrpc_congest_mode { 535 RXRPC_CALL_SLOW_START, 536 RXRPC_CALL_CONGEST_AVOIDANCE, 537 RXRPC_CALL_PACKET_LOSS, 538 RXRPC_CALL_FAST_RETRANSMIT, 539 NR__RXRPC_CONGEST_MODES 540 }; 541 542 /* 543 * RxRPC call definition 544 * - matched by { connection, call_id } 545 */ 546 struct rxrpc_call { 547 struct rcu_head rcu; 548 struct rxrpc_connection *conn; /* connection carrying call */ 549 struct rxrpc_peer *peer; /* Peer record for remote address */ 550 struct rxrpc_sock __rcu *socket; /* socket responsible */ 551 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 552 struct mutex user_mutex; /* User access mutex */ 553 unsigned long ack_at; /* When deferred ACK needs to happen */ 554 unsigned long ack_lost_at; /* When ACK is figured as lost */ 555 unsigned long resend_at; /* When next resend needs to happen */ 556 unsigned long ping_at; /* When next to send a ping */ 557 unsigned long keepalive_at; /* When next to send a keepalive ping */ 558 unsigned long expect_rx_by; /* When we expect to get a packet by */ 559 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 560 unsigned long expect_term_by; /* When we expect call termination by */ 561 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 562 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 563 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 564 struct timer_list timer; /* Combined event timer */ 565 struct work_struct processor; /* Event processor */ 566 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 567 struct list_head link; /* link in master call list */ 568 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 569 struct hlist_node error_link; /* link in error distribution list */ 570 struct list_head accept_link; /* Link in rx->acceptq */ 571 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 572 struct list_head sock_link; /* Link in rx->sock_calls */ 573 struct rb_node sock_node; /* Node in rx->calls */ 574 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 575 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 576 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 577 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 578 unsigned long user_call_ID; /* user-defined call ID */ 579 unsigned long flags; 580 unsigned long events; 581 spinlock_t lock; 582 spinlock_t notify_lock; /* Kernel notification lock */ 583 rwlock_t state_lock; /* lock for state transition */ 584 u32 abort_code; /* Local/remote abort code */ 585 int error; /* Local error incurred */ 586 enum rxrpc_call_state state; /* current state of call */ 587 enum rxrpc_call_completion completion; /* Call completion condition */ 588 atomic_t usage; 589 u16 service_id; /* service ID */ 590 u8 security_ix; /* Security type */ 591 u32 call_id; /* call ID on connection */ 592 u32 cid; /* connection ID plus channel index */ 593 int debug_id; /* debug ID for printks */ 594 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 595 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 596 597 /* Rx/Tx circular buffer, depending on phase. 598 * 599 * In the Rx phase, packets are annotated with 0 or the number of the 600 * segment of a jumbo packet each buffer refers to. There can be up to 601 * 47 segments in a maximum-size UDP packet. 602 * 603 * In the Tx phase, packets are annotated with which buffers have been 604 * acked. 605 */ 606 #define RXRPC_RXTX_BUFF_SIZE 64 607 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 608 #define RXRPC_INIT_RX_WINDOW_SIZE 63 609 struct sk_buff **rxtx_buffer; 610 u8 *rxtx_annotations; 611 #define RXRPC_TX_ANNO_ACK 0 612 #define RXRPC_TX_ANNO_UNACK 1 613 #define RXRPC_TX_ANNO_NAK 2 614 #define RXRPC_TX_ANNO_RETRANS 3 615 #define RXRPC_TX_ANNO_MASK 0x03 616 #define RXRPC_TX_ANNO_LAST 0x04 617 #define RXRPC_TX_ANNO_RESENT 0x08 618 619 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 620 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 621 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 622 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 623 * not hard-ACK'd packet follows this. 624 */ 625 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 626 u16 tx_backoff; /* Delay to insert due to Tx failure */ 627 628 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 629 * is fixed, we keep these numbers in terms of segments (ie. DATA 630 * packets) rather than bytes. 631 */ 632 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 633 u8 cong_cwnd; /* Congestion window size */ 634 u8 cong_extra; /* Extra to send for congestion management */ 635 u8 cong_ssthresh; /* Slow-start threshold */ 636 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 637 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 638 u8 cong_cumul_acks; /* Cumulative ACK count */ 639 ktime_t cong_tstamp; /* Last time cwnd was changed */ 640 641 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 642 * consumed packet follows this. 643 */ 644 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 645 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 646 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 647 u8 rx_winsize; /* Size of Rx window */ 648 u8 tx_winsize; /* Maximum size of Tx window */ 649 bool tx_phase; /* T if transmission phase, F if receive phase */ 650 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 651 652 spinlock_t input_lock; /* Lock for packet input to this call */ 653 654 /* receive-phase ACK management */ 655 u8 ackr_reason; /* reason to ACK */ 656 u16 ackr_skew; /* skew on packet being ACK'd */ 657 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 658 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 659 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 660 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 661 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 662 663 /* ping management */ 664 rxrpc_serial_t ping_serial; /* Last ping sent */ 665 ktime_t ping_time; /* Time last ping sent */ 666 667 /* transmission-phase ACK management */ 668 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 669 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 670 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 671 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 672 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 673 }; 674 675 /* 676 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 677 */ 678 struct rxrpc_ack_summary { 679 u8 ack_reason; 680 u8 nr_acks; /* Number of ACKs in packet */ 681 u8 nr_nacks; /* Number of NACKs in packet */ 682 u8 nr_new_acks; /* Number of new ACKs in packet */ 683 u8 nr_new_nacks; /* Number of new NACKs in packet */ 684 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 685 bool new_low_nack; /* T if new low NACK found */ 686 bool retrans_timeo; /* T if reTx due to timeout happened */ 687 u8 flight_size; /* Number of unreceived transmissions */ 688 /* Place to stash values for tracing */ 689 enum rxrpc_congest_mode mode:8; 690 u8 cwnd; 691 u8 ssthresh; 692 u8 dup_acks; 693 u8 cumulative_acks; 694 }; 695 696 /* 697 * sendmsg() cmsg-specified parameters. 698 */ 699 enum rxrpc_command { 700 RXRPC_CMD_SEND_DATA, /* send data message */ 701 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 702 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 703 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 704 }; 705 706 struct rxrpc_call_params { 707 s64 tx_total_len; /* Total Tx data length (if send data) */ 708 unsigned long user_call_ID; /* User's call ID */ 709 struct { 710 u32 hard; /* Maximum lifetime (sec) */ 711 u32 idle; /* Max time since last data packet (msec) */ 712 u32 normal; /* Max time since last call packet (msec) */ 713 } timeouts; 714 u8 nr_timeouts; /* Number of timeouts specified */ 715 bool intr; /* The call is interruptible */ 716 }; 717 718 struct rxrpc_send_params { 719 struct rxrpc_call_params call; 720 u32 abort_code; /* Abort code to Tx (if abort) */ 721 enum rxrpc_command command : 8; /* The command to implement */ 722 bool exclusive; /* Shared or exclusive call */ 723 bool upgrade; /* If the connection is upgradeable */ 724 }; 725 726 #include <trace/events/rxrpc.h> 727 728 /* 729 * af_rxrpc.c 730 */ 731 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 732 extern struct workqueue_struct *rxrpc_workqueue; 733 734 /* 735 * call_accept.c 736 */ 737 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 738 void rxrpc_discard_prealloc(struct rxrpc_sock *); 739 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 740 struct rxrpc_sock *, 741 struct sk_buff *); 742 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 743 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 744 rxrpc_notify_rx_t); 745 int rxrpc_reject_call(struct rxrpc_sock *); 746 747 /* 748 * call_event.c 749 */ 750 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 751 enum rxrpc_propose_ack_trace); 752 void rxrpc_process_call(struct work_struct *); 753 754 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 755 unsigned long expire_at, 756 unsigned long now, 757 enum rxrpc_timer_trace why) 758 { 759 trace_rxrpc_timer(call, why, now); 760 timer_reduce(&call->timer, expire_at); 761 } 762 763 /* 764 * call_object.c 765 */ 766 extern const char *const rxrpc_call_states[]; 767 extern const char *const rxrpc_call_completions[]; 768 extern unsigned int rxrpc_max_call_lifetime; 769 extern struct kmem_cache *rxrpc_call_jar; 770 771 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 772 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 773 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 774 struct rxrpc_conn_parameters *, 775 struct sockaddr_rxrpc *, 776 struct rxrpc_call_params *, gfp_t, 777 unsigned int); 778 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 779 struct sk_buff *); 780 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 781 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 782 bool __rxrpc_queue_call(struct rxrpc_call *); 783 bool rxrpc_queue_call(struct rxrpc_call *); 784 void rxrpc_see_call(struct rxrpc_call *); 785 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 786 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 787 void rxrpc_cleanup_call(struct rxrpc_call *); 788 void rxrpc_destroy_all_calls(struct rxrpc_net *); 789 790 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 791 { 792 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 793 } 794 795 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 796 { 797 return !rxrpc_is_service_call(call); 798 } 799 800 /* 801 * Transition a call to the complete state. 802 */ 803 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 804 enum rxrpc_call_completion compl, 805 u32 abort_code, 806 int error) 807 { 808 if (call->state < RXRPC_CALL_COMPLETE) { 809 call->abort_code = abort_code; 810 call->error = error; 811 call->completion = compl, 812 call->state = RXRPC_CALL_COMPLETE; 813 trace_rxrpc_call_complete(call); 814 wake_up(&call->waitq); 815 return true; 816 } 817 return false; 818 } 819 820 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 821 enum rxrpc_call_completion compl, 822 u32 abort_code, 823 int error) 824 { 825 bool ret; 826 827 write_lock_bh(&call->state_lock); 828 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 829 write_unlock_bh(&call->state_lock); 830 return ret; 831 } 832 833 /* 834 * Record that a call successfully completed. 835 */ 836 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 837 { 838 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 839 } 840 841 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 842 { 843 bool ret; 844 845 write_lock_bh(&call->state_lock); 846 ret = __rxrpc_call_completed(call); 847 write_unlock_bh(&call->state_lock); 848 return ret; 849 } 850 851 /* 852 * Record that a call is locally aborted. 853 */ 854 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 855 rxrpc_seq_t seq, 856 u32 abort_code, int error) 857 { 858 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 859 abort_code, error); 860 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 861 abort_code, error); 862 } 863 864 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 865 rxrpc_seq_t seq, u32 abort_code, int error) 866 { 867 bool ret; 868 869 write_lock_bh(&call->state_lock); 870 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 871 write_unlock_bh(&call->state_lock); 872 return ret; 873 } 874 875 /* 876 * Abort a call due to a protocol error. 877 */ 878 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 879 struct sk_buff *skb, 880 const char *eproto_why, 881 const char *why, 882 u32 abort_code) 883 { 884 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 885 886 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 887 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 888 } 889 890 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 891 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 892 (abort_why), (abort_code)) 893 894 /* 895 * conn_client.c 896 */ 897 extern unsigned int rxrpc_max_client_connections; 898 extern unsigned int rxrpc_reap_client_connections; 899 extern unsigned long rxrpc_conn_idle_client_expiry; 900 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 901 extern struct idr rxrpc_client_conn_ids; 902 903 void rxrpc_destroy_client_conn_ids(void); 904 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 905 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 906 gfp_t); 907 void rxrpc_expose_client_call(struct rxrpc_call *); 908 void rxrpc_disconnect_client_call(struct rxrpc_call *); 909 void rxrpc_put_client_conn(struct rxrpc_connection *); 910 void rxrpc_discard_expired_client_conns(struct work_struct *); 911 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 912 913 /* 914 * conn_event.c 915 */ 916 void rxrpc_process_connection(struct work_struct *); 917 918 /* 919 * conn_object.c 920 */ 921 extern unsigned int rxrpc_connection_expiry; 922 extern unsigned int rxrpc_closed_conn_expiry; 923 924 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 925 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 926 struct sk_buff *, 927 struct rxrpc_peer **); 928 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 929 void rxrpc_disconnect_call(struct rxrpc_call *); 930 void rxrpc_kill_connection(struct rxrpc_connection *); 931 bool rxrpc_queue_conn(struct rxrpc_connection *); 932 void rxrpc_see_connection(struct rxrpc_connection *); 933 void rxrpc_get_connection(struct rxrpc_connection *); 934 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 935 void rxrpc_put_service_conn(struct rxrpc_connection *); 936 void rxrpc_service_connection_reaper(struct work_struct *); 937 void rxrpc_destroy_all_connections(struct rxrpc_net *); 938 939 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 940 { 941 return conn->out_clientflag; 942 } 943 944 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 945 { 946 return !rxrpc_conn_is_client(conn); 947 } 948 949 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 950 { 951 if (!conn) 952 return; 953 954 if (rxrpc_conn_is_client(conn)) 955 rxrpc_put_client_conn(conn); 956 else 957 rxrpc_put_service_conn(conn); 958 } 959 960 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 961 unsigned long expire_at) 962 { 963 timer_reduce(&conn->timer, expire_at); 964 } 965 966 /* 967 * conn_service.c 968 */ 969 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 970 struct sk_buff *); 971 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 972 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 973 struct rxrpc_connection *, struct sk_buff *); 974 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 975 976 /* 977 * input.c 978 */ 979 int rxrpc_input_packet(struct sock *, struct sk_buff *); 980 981 /* 982 * insecure.c 983 */ 984 extern const struct rxrpc_security rxrpc_no_security; 985 986 /* 987 * key.c 988 */ 989 extern struct key_type key_type_rxrpc; 990 extern struct key_type key_type_rxrpc_s; 991 992 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 993 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 994 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 995 u32); 996 997 /* 998 * local_event.c 999 */ 1000 extern void rxrpc_process_local_events(struct rxrpc_local *); 1001 1002 /* 1003 * local_object.c 1004 */ 1005 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 1006 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 1007 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 1008 void rxrpc_put_local(struct rxrpc_local *); 1009 void rxrpc_queue_local(struct rxrpc_local *); 1010 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1011 1012 /* 1013 * misc.c 1014 */ 1015 extern unsigned int rxrpc_max_backlog __read_mostly; 1016 extern unsigned long rxrpc_requested_ack_delay; 1017 extern unsigned long rxrpc_soft_ack_delay; 1018 extern unsigned long rxrpc_idle_ack_delay; 1019 extern unsigned int rxrpc_rx_window_size; 1020 extern unsigned int rxrpc_rx_mtu; 1021 extern unsigned int rxrpc_rx_jumbo_max; 1022 extern unsigned long rxrpc_resend_timeout; 1023 1024 extern const s8 rxrpc_ack_priority[]; 1025 1026 /* 1027 * net_ns.c 1028 */ 1029 extern unsigned int rxrpc_net_id; 1030 extern struct pernet_operations rxrpc_net_ops; 1031 1032 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1033 { 1034 return net_generic(net, rxrpc_net_id); 1035 } 1036 1037 /* 1038 * output.c 1039 */ 1040 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1041 int rxrpc_send_abort_packet(struct rxrpc_call *); 1042 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1043 void rxrpc_reject_packets(struct rxrpc_local *); 1044 void rxrpc_send_keepalive(struct rxrpc_peer *); 1045 1046 /* 1047 * peer_event.c 1048 */ 1049 void rxrpc_error_report(struct sock *); 1050 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1051 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1052 void rxrpc_peer_keepalive_worker(struct work_struct *); 1053 1054 /* 1055 * peer_object.c 1056 */ 1057 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1058 const struct sockaddr_rxrpc *); 1059 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1060 struct sockaddr_rxrpc *, gfp_t); 1061 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1062 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1063 struct rxrpc_peer *); 1064 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1065 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1066 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1067 void rxrpc_put_peer(struct rxrpc_peer *); 1068 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1069 1070 /* 1071 * proc.c 1072 */ 1073 extern const struct seq_operations rxrpc_call_seq_ops; 1074 extern const struct seq_operations rxrpc_connection_seq_ops; 1075 extern const struct seq_operations rxrpc_peer_seq_ops; 1076 1077 /* 1078 * recvmsg.c 1079 */ 1080 void rxrpc_notify_socket(struct rxrpc_call *); 1081 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1082 1083 /* 1084 * rxkad.c 1085 */ 1086 #ifdef CONFIG_RXKAD 1087 extern const struct rxrpc_security rxkad; 1088 #endif 1089 1090 /* 1091 * security.c 1092 */ 1093 int __init rxrpc_init_security(void); 1094 void rxrpc_exit_security(void); 1095 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1096 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1097 1098 /* 1099 * sendmsg.c 1100 */ 1101 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1102 1103 /* 1104 * skbuff.c 1105 */ 1106 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1107 void rxrpc_packet_destructor(struct sk_buff *); 1108 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1109 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1110 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1111 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1112 void rxrpc_purge_queue(struct sk_buff_head *); 1113 1114 /* 1115 * sysctl.c 1116 */ 1117 #ifdef CONFIG_SYSCTL 1118 extern int __init rxrpc_sysctl_init(void); 1119 extern void rxrpc_sysctl_exit(void); 1120 #else 1121 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1122 static inline void rxrpc_sysctl_exit(void) {} 1123 #endif 1124 1125 /* 1126 * utils.c 1127 */ 1128 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1129 1130 static inline bool before(u32 seq1, u32 seq2) 1131 { 1132 return (s32)(seq1 - seq2) < 0; 1133 } 1134 static inline bool before_eq(u32 seq1, u32 seq2) 1135 { 1136 return (s32)(seq1 - seq2) <= 0; 1137 } 1138 static inline bool after(u32 seq1, u32 seq2) 1139 { 1140 return (s32)(seq1 - seq2) > 0; 1141 } 1142 static inline bool after_eq(u32 seq1, u32 seq2) 1143 { 1144 return (s32)(seq1 - seq2) >= 0; 1145 } 1146 1147 /* 1148 * debug tracing 1149 */ 1150 extern unsigned int rxrpc_debug; 1151 1152 #define dbgprintk(FMT,...) \ 1153 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1154 1155 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1156 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1157 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1158 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1159 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1160 1161 1162 #if defined(__KDEBUG) 1163 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1164 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1165 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1166 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1167 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1168 1169 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1170 #define RXRPC_DEBUG_KENTER 0x01 1171 #define RXRPC_DEBUG_KLEAVE 0x02 1172 #define RXRPC_DEBUG_KDEBUG 0x04 1173 #define RXRPC_DEBUG_KPROTO 0x08 1174 #define RXRPC_DEBUG_KNET 0x10 1175 1176 #define _enter(FMT,...) \ 1177 do { \ 1178 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1179 kenter(FMT,##__VA_ARGS__); \ 1180 } while (0) 1181 1182 #define _leave(FMT,...) \ 1183 do { \ 1184 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1185 kleave(FMT,##__VA_ARGS__); \ 1186 } while (0) 1187 1188 #define _debug(FMT,...) \ 1189 do { \ 1190 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1191 kdebug(FMT,##__VA_ARGS__); \ 1192 } while (0) 1193 1194 #define _proto(FMT,...) \ 1195 do { \ 1196 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1197 kproto(FMT,##__VA_ARGS__); \ 1198 } while (0) 1199 1200 #define _net(FMT,...) \ 1201 do { \ 1202 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1203 knet(FMT,##__VA_ARGS__); \ 1204 } while (0) 1205 1206 #else 1207 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1208 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1209 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1210 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1211 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1212 #endif 1213 1214 /* 1215 * debug assertion checking 1216 */ 1217 #if 1 // defined(__KDEBUGALL) 1218 1219 #define ASSERT(X) \ 1220 do { \ 1221 if (unlikely(!(X))) { \ 1222 pr_err("Assertion failed\n"); \ 1223 BUG(); \ 1224 } \ 1225 } while (0) 1226 1227 #define ASSERTCMP(X, OP, Y) \ 1228 do { \ 1229 __typeof__(X) _x = (X); \ 1230 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1231 if (unlikely(!(_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 #define ASSERTIF(C, X) \ 1240 do { \ 1241 if (unlikely((C) && !(X))) { \ 1242 pr_err("Assertion failed\n"); \ 1243 BUG(); \ 1244 } \ 1245 } while (0) 1246 1247 #define ASSERTIFCMP(C, X, OP, Y) \ 1248 do { \ 1249 __typeof__(X) _x = (X); \ 1250 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1251 if (unlikely((C) && !(_x OP _y))) { \ 1252 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1253 (unsigned long)_x, (unsigned long)_x, #OP, \ 1254 (unsigned long)_y, (unsigned long)_y); \ 1255 BUG(); \ 1256 } \ 1257 } while (0) 1258 1259 #else 1260 1261 #define ASSERT(X) \ 1262 do { \ 1263 } while (0) 1264 1265 #define ASSERTCMP(X, OP, Y) \ 1266 do { \ 1267 } while (0) 1268 1269 #define ASSERTIF(C, X) \ 1270 do { \ 1271 } while (0) 1272 1273 #define ASSERTIFCMP(C, X, OP, Y) \ 1274 do { \ 1275 } while (0) 1276 1277 #endif /* __KDEBUGALL */ 1278