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 /* Locate the data in a received packet that has been verified. */ 230 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 231 unsigned int *, unsigned int *); 232 233 /* issue a challenge */ 234 int (*issue_challenge)(struct rxrpc_connection *); 235 236 /* respond to a challenge */ 237 int (*respond_to_challenge)(struct rxrpc_connection *, 238 struct sk_buff *, 239 u32 *); 240 241 /* verify a response */ 242 int (*verify_response)(struct rxrpc_connection *, 243 struct sk_buff *, 244 u32 *); 245 246 /* clear connection security */ 247 void (*clear)(struct rxrpc_connection *); 248 }; 249 250 /* 251 * RxRPC local transport endpoint description 252 * - owned by a single AF_RXRPC socket 253 * - pointed to by transport socket struct sk_user_data 254 */ 255 struct rxrpc_local { 256 struct rcu_head rcu; 257 atomic_t usage; 258 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 259 struct list_head link; 260 struct socket *socket; /* my UDP socket */ 261 struct work_struct processor; 262 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 263 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 264 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 265 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 266 struct rb_root client_conns; /* Client connections by socket params */ 267 spinlock_t client_conns_lock; /* Lock for client_conns */ 268 spinlock_t lock; /* access lock */ 269 rwlock_t services_lock; /* lock for services list */ 270 int debug_id; /* debug ID for printks */ 271 bool dead; 272 bool service_closed; /* Service socket closed */ 273 struct sockaddr_rxrpc srx; /* local address */ 274 }; 275 276 /* 277 * RxRPC remote transport endpoint definition 278 * - matched by local endpoint, remote port, address and protocol type 279 */ 280 struct rxrpc_peer { 281 struct rcu_head rcu; /* This must be first */ 282 atomic_t usage; 283 unsigned long hash_key; 284 struct hlist_node hash_link; 285 struct rxrpc_local *local; 286 struct hlist_head error_targets; /* targets for net error distribution */ 287 struct rb_root service_conns; /* Service connections */ 288 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 289 time64_t last_tx_at; /* Last time packet sent here */ 290 seqlock_t service_conn_lock; 291 spinlock_t lock; /* access lock */ 292 unsigned int if_mtu; /* interface MTU for this peer */ 293 unsigned int mtu; /* network MTU for this peer */ 294 unsigned int maxdata; /* data size (MTU - hdrsize) */ 295 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 296 int debug_id; /* debug ID for printks */ 297 struct sockaddr_rxrpc srx; /* remote address */ 298 299 /* calculated RTT cache */ 300 #define RXRPC_RTT_CACHE_SIZE 32 301 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 302 ktime_t rtt_last_req; /* Time of last RTT request */ 303 u64 rtt; /* Current RTT estimate (in nS) */ 304 u64 rtt_sum; /* Sum of cache contents */ 305 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 306 u8 rtt_cursor; /* next entry at which to insert */ 307 u8 rtt_usage; /* amount of cache actually used */ 308 309 u8 cong_cwnd; /* Congestion window size */ 310 }; 311 312 /* 313 * Keys for matching a connection. 314 */ 315 struct rxrpc_conn_proto { 316 union { 317 struct { 318 u32 epoch; /* epoch of this connection */ 319 u32 cid; /* connection ID */ 320 }; 321 u64 index_key; 322 }; 323 }; 324 325 struct rxrpc_conn_parameters { 326 struct rxrpc_local *local; /* Representation of local endpoint */ 327 struct rxrpc_peer *peer; /* Remote endpoint */ 328 struct key *key; /* Security details */ 329 bool exclusive; /* T if conn is exclusive */ 330 bool upgrade; /* T if service ID can be upgraded */ 331 u16 service_id; /* Service ID for this connection */ 332 u32 security_level; /* Security level selected */ 333 }; 334 335 /* 336 * Bits in the connection flags. 337 */ 338 enum rxrpc_conn_flag { 339 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 340 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 341 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 342 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 343 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 344 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 345 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 346 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 347 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 348 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 349 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 350 }; 351 352 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 353 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 354 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 355 (1UL << RXRPC_CONN_FINAL_ACK_3)) 356 357 /* 358 * Events that can be raised upon a connection. 359 */ 360 enum rxrpc_conn_event { 361 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 362 }; 363 364 /* 365 * The connection cache state. 366 */ 367 enum rxrpc_conn_cache_state { 368 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 369 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 370 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 371 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 372 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 373 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 374 RXRPC_CONN__NR_CACHE_STATES 375 }; 376 377 /* 378 * The connection protocol state. 379 */ 380 enum rxrpc_conn_proto_state { 381 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 382 RXRPC_CONN_CLIENT, /* Client connection */ 383 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 384 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 385 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 386 RXRPC_CONN_SERVICE, /* Service secured connection */ 387 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 388 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 389 RXRPC_CONN__NR_STATES 390 }; 391 392 /* 393 * RxRPC connection definition 394 * - matched by { local, peer, epoch, conn_id, direction } 395 * - each connection can only handle four simultaneous calls 396 */ 397 struct rxrpc_connection { 398 struct rxrpc_conn_proto proto; 399 struct rxrpc_conn_parameters params; 400 401 atomic_t usage; 402 struct rcu_head rcu; 403 struct list_head cache_link; 404 405 spinlock_t channel_lock; 406 unsigned char active_chans; /* Mask of active channels */ 407 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 408 struct list_head waiting_calls; /* Calls waiting for channels */ 409 struct rxrpc_channel { 410 unsigned long final_ack_at; /* Time at which to issue final ACK */ 411 struct rxrpc_call __rcu *call; /* Active call */ 412 unsigned int call_debug_id; /* call->debug_id */ 413 u32 call_id; /* ID of current call */ 414 u32 call_counter; /* Call ID counter */ 415 u32 last_call; /* ID of last call */ 416 u8 last_type; /* Type of last packet */ 417 union { 418 u32 last_seq; 419 u32 last_abort; 420 }; 421 } channels[RXRPC_MAXCALLS]; 422 423 struct timer_list timer; /* Conn event timer */ 424 struct work_struct processor; /* connection event processor */ 425 union { 426 struct rb_node client_node; /* Node in local->client_conns */ 427 struct rb_node service_node; /* Node in peer->service_conns */ 428 }; 429 struct list_head proc_link; /* link in procfs list */ 430 struct list_head link; /* link in master connection list */ 431 struct sk_buff_head rx_queue; /* received conn-level packets */ 432 const struct rxrpc_security *security; /* applied security module */ 433 struct key *server_key; /* security for this service */ 434 struct crypto_sync_skcipher *cipher; /* encryption handle */ 435 struct rxrpc_crypt csum_iv; /* packet checksum base */ 436 unsigned long flags; 437 unsigned long events; 438 unsigned long idle_timestamp; /* Time at which last became idle */ 439 spinlock_t state_lock; /* state-change lock */ 440 enum rxrpc_conn_cache_state cache_state; 441 enum rxrpc_conn_proto_state state; /* current state of connection */ 442 u32 abort_code; /* Abort code of connection abort */ 443 int debug_id; /* debug ID for printks */ 444 atomic_t serial; /* packet serial number counter */ 445 unsigned int hi_serial; /* highest serial number received */ 446 u32 security_nonce; /* response re-use preventer */ 447 u32 service_id; /* Service ID, possibly upgraded */ 448 u8 size_align; /* data size alignment (for security) */ 449 u8 security_size; /* security header size */ 450 u8 security_ix; /* security type */ 451 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 452 short error; /* Local error code */ 453 }; 454 455 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 456 { 457 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 458 } 459 460 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 461 { 462 return !rxrpc_to_server(sp); 463 } 464 465 /* 466 * Flags in call->flags. 467 */ 468 enum rxrpc_call_flag { 469 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 470 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 471 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 472 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 473 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 474 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 475 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 476 RXRPC_CALL_PINGING, /* Ping in process */ 477 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 478 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 479 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 480 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 481 RXRPC_CALL_IS_INTR, /* The call is interruptible */ 482 }; 483 484 /* 485 * Events that can be raised on a call. 486 */ 487 enum rxrpc_call_event { 488 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 489 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 490 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 491 RXRPC_CALL_EV_PING, /* Ping send required */ 492 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 493 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 494 }; 495 496 /* 497 * The states that a call can be in. 498 */ 499 enum rxrpc_call_state { 500 RXRPC_CALL_UNINITIALISED, 501 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 502 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 503 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 504 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 505 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 506 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 507 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 508 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 509 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 510 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 511 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 512 RXRPC_CALL_COMPLETE, /* - call complete */ 513 NR__RXRPC_CALL_STATES 514 }; 515 516 /* 517 * Call completion condition (state == RXRPC_CALL_COMPLETE). 518 */ 519 enum rxrpc_call_completion { 520 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 521 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 522 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 523 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 524 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 525 NR__RXRPC_CALL_COMPLETIONS 526 }; 527 528 /* 529 * Call Tx congestion management modes. 530 */ 531 enum rxrpc_congest_mode { 532 RXRPC_CALL_SLOW_START, 533 RXRPC_CALL_CONGEST_AVOIDANCE, 534 RXRPC_CALL_PACKET_LOSS, 535 RXRPC_CALL_FAST_RETRANSMIT, 536 NR__RXRPC_CONGEST_MODES 537 }; 538 539 /* 540 * RxRPC call definition 541 * - matched by { connection, call_id } 542 */ 543 struct rxrpc_call { 544 struct rcu_head rcu; 545 struct rxrpc_connection *conn; /* connection carrying call */ 546 struct rxrpc_peer *peer; /* Peer record for remote address */ 547 struct rxrpc_sock __rcu *socket; /* socket responsible */ 548 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 549 struct mutex user_mutex; /* User access mutex */ 550 unsigned long ack_at; /* When deferred ACK needs to happen */ 551 unsigned long ack_lost_at; /* When ACK is figured as lost */ 552 unsigned long resend_at; /* When next resend needs to happen */ 553 unsigned long ping_at; /* When next to send a ping */ 554 unsigned long keepalive_at; /* When next to send a keepalive ping */ 555 unsigned long expect_rx_by; /* When we expect to get a packet by */ 556 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 557 unsigned long expect_term_by; /* When we expect call termination by */ 558 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 559 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 560 struct timer_list timer; /* Combined event timer */ 561 struct work_struct processor; /* Event processor */ 562 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 563 struct list_head link; /* link in master call list */ 564 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 565 struct hlist_node error_link; /* link in error distribution list */ 566 struct list_head accept_link; /* Link in rx->acceptq */ 567 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 568 struct list_head sock_link; /* Link in rx->sock_calls */ 569 struct rb_node sock_node; /* Node in rx->calls */ 570 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 571 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 572 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 573 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 574 unsigned long user_call_ID; /* user-defined call ID */ 575 unsigned long flags; 576 unsigned long events; 577 spinlock_t lock; 578 spinlock_t notify_lock; /* Kernel notification lock */ 579 rwlock_t state_lock; /* lock for state transition */ 580 u32 abort_code; /* Local/remote abort code */ 581 int error; /* Local error incurred */ 582 enum rxrpc_call_state state; /* current state of call */ 583 enum rxrpc_call_completion completion; /* Call completion condition */ 584 atomic_t usage; 585 u16 service_id; /* service ID */ 586 u8 security_ix; /* Security type */ 587 u32 call_id; /* call ID on connection */ 588 u32 cid; /* connection ID plus channel index */ 589 int debug_id; /* debug ID for printks */ 590 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 591 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 592 593 /* Rx/Tx circular buffer, depending on phase. 594 * 595 * In the Rx phase, packets are annotated with 0 or the number of the 596 * segment of a jumbo packet each buffer refers to. There can be up to 597 * 47 segments in a maximum-size UDP packet. 598 * 599 * In the Tx phase, packets are annotated with which buffers have been 600 * acked. 601 */ 602 #define RXRPC_RXTX_BUFF_SIZE 64 603 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 604 #define RXRPC_INIT_RX_WINDOW_SIZE 63 605 struct sk_buff **rxtx_buffer; 606 u8 *rxtx_annotations; 607 #define RXRPC_TX_ANNO_ACK 0 608 #define RXRPC_TX_ANNO_UNACK 1 609 #define RXRPC_TX_ANNO_NAK 2 610 #define RXRPC_TX_ANNO_RETRANS 3 611 #define RXRPC_TX_ANNO_MASK 0x03 612 #define RXRPC_TX_ANNO_LAST 0x04 613 #define RXRPC_TX_ANNO_RESENT 0x08 614 615 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 616 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 617 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 618 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 619 * not hard-ACK'd packet follows this. 620 */ 621 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 622 u16 tx_backoff; /* Delay to insert due to Tx failure */ 623 624 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 625 * is fixed, we keep these numbers in terms of segments (ie. DATA 626 * packets) rather than bytes. 627 */ 628 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 629 u8 cong_cwnd; /* Congestion window size */ 630 u8 cong_extra; /* Extra to send for congestion management */ 631 u8 cong_ssthresh; /* Slow-start threshold */ 632 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 633 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 634 u8 cong_cumul_acks; /* Cumulative ACK count */ 635 ktime_t cong_tstamp; /* Last time cwnd was changed */ 636 637 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 638 * consumed packet follows this. 639 */ 640 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 641 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 642 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 643 u8 rx_winsize; /* Size of Rx window */ 644 u8 tx_winsize; /* Maximum size of Tx window */ 645 bool tx_phase; /* T if transmission phase, F if receive phase */ 646 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 647 648 spinlock_t input_lock; /* Lock for packet input to this call */ 649 650 /* receive-phase ACK management */ 651 u8 ackr_reason; /* reason to ACK */ 652 u16 ackr_skew; /* skew on packet being ACK'd */ 653 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 654 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 655 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 656 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 657 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 658 659 /* ping management */ 660 rxrpc_serial_t ping_serial; /* Last ping sent */ 661 ktime_t ping_time; /* Time last ping sent */ 662 663 /* transmission-phase ACK management */ 664 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 665 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 666 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 667 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 668 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 669 }; 670 671 /* 672 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 673 */ 674 struct rxrpc_ack_summary { 675 u8 ack_reason; 676 u8 nr_acks; /* Number of ACKs in packet */ 677 u8 nr_nacks; /* Number of NACKs in packet */ 678 u8 nr_new_acks; /* Number of new ACKs in packet */ 679 u8 nr_new_nacks; /* Number of new NACKs in packet */ 680 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 681 bool new_low_nack; /* T if new low NACK found */ 682 bool retrans_timeo; /* T if reTx due to timeout happened */ 683 u8 flight_size; /* Number of unreceived transmissions */ 684 /* Place to stash values for tracing */ 685 enum rxrpc_congest_mode mode:8; 686 u8 cwnd; 687 u8 ssthresh; 688 u8 dup_acks; 689 u8 cumulative_acks; 690 }; 691 692 /* 693 * sendmsg() cmsg-specified parameters. 694 */ 695 enum rxrpc_command { 696 RXRPC_CMD_SEND_DATA, /* send data message */ 697 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 698 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 699 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 700 }; 701 702 struct rxrpc_call_params { 703 s64 tx_total_len; /* Total Tx data length (if send data) */ 704 unsigned long user_call_ID; /* User's call ID */ 705 struct { 706 u32 hard; /* Maximum lifetime (sec) */ 707 u32 idle; /* Max time since last data packet (msec) */ 708 u32 normal; /* Max time since last call packet (msec) */ 709 } timeouts; 710 u8 nr_timeouts; /* Number of timeouts specified */ 711 bool intr; /* The call is interruptible */ 712 }; 713 714 struct rxrpc_send_params { 715 struct rxrpc_call_params call; 716 u32 abort_code; /* Abort code to Tx (if abort) */ 717 enum rxrpc_command command : 8; /* The command to implement */ 718 bool exclusive; /* Shared or exclusive call */ 719 bool upgrade; /* If the connection is upgradeable */ 720 }; 721 722 #include <trace/events/rxrpc.h> 723 724 /* 725 * af_rxrpc.c 726 */ 727 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 728 extern struct workqueue_struct *rxrpc_workqueue; 729 730 /* 731 * call_accept.c 732 */ 733 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 734 void rxrpc_discard_prealloc(struct rxrpc_sock *); 735 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 736 struct rxrpc_sock *, 737 struct sk_buff *); 738 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 739 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 740 rxrpc_notify_rx_t); 741 int rxrpc_reject_call(struct rxrpc_sock *); 742 743 /* 744 * call_event.c 745 */ 746 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 747 enum rxrpc_propose_ack_trace); 748 void rxrpc_process_call(struct work_struct *); 749 750 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 751 unsigned long expire_at, 752 unsigned long now, 753 enum rxrpc_timer_trace why) 754 { 755 trace_rxrpc_timer(call, why, now); 756 timer_reduce(&call->timer, expire_at); 757 } 758 759 /* 760 * call_object.c 761 */ 762 extern const char *const rxrpc_call_states[]; 763 extern const char *const rxrpc_call_completions[]; 764 extern unsigned int rxrpc_max_call_lifetime; 765 extern struct kmem_cache *rxrpc_call_jar; 766 767 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 768 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 769 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 770 struct rxrpc_conn_parameters *, 771 struct sockaddr_rxrpc *, 772 struct rxrpc_call_params *, gfp_t, 773 unsigned int); 774 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 775 struct sk_buff *); 776 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 777 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 778 bool __rxrpc_queue_call(struct rxrpc_call *); 779 bool rxrpc_queue_call(struct rxrpc_call *); 780 void rxrpc_see_call(struct rxrpc_call *); 781 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 782 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 783 void rxrpc_cleanup_call(struct rxrpc_call *); 784 void rxrpc_destroy_all_calls(struct rxrpc_net *); 785 786 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 787 { 788 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 789 } 790 791 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 792 { 793 return !rxrpc_is_service_call(call); 794 } 795 796 /* 797 * Transition a call to the complete state. 798 */ 799 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 800 enum rxrpc_call_completion compl, 801 u32 abort_code, 802 int error) 803 { 804 if (call->state < RXRPC_CALL_COMPLETE) { 805 call->abort_code = abort_code; 806 call->error = error; 807 call->completion = compl, 808 call->state = RXRPC_CALL_COMPLETE; 809 trace_rxrpc_call_complete(call); 810 wake_up(&call->waitq); 811 return true; 812 } 813 return false; 814 } 815 816 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 817 enum rxrpc_call_completion compl, 818 u32 abort_code, 819 int error) 820 { 821 bool ret; 822 823 write_lock_bh(&call->state_lock); 824 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 825 write_unlock_bh(&call->state_lock); 826 return ret; 827 } 828 829 /* 830 * Record that a call successfully completed. 831 */ 832 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 833 { 834 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 835 } 836 837 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 838 { 839 bool ret; 840 841 write_lock_bh(&call->state_lock); 842 ret = __rxrpc_call_completed(call); 843 write_unlock_bh(&call->state_lock); 844 return ret; 845 } 846 847 /* 848 * Record that a call is locally aborted. 849 */ 850 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 851 rxrpc_seq_t seq, 852 u32 abort_code, int error) 853 { 854 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 855 abort_code, error); 856 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 857 abort_code, error); 858 } 859 860 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 861 rxrpc_seq_t seq, u32 abort_code, int error) 862 { 863 bool ret; 864 865 write_lock_bh(&call->state_lock); 866 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 867 write_unlock_bh(&call->state_lock); 868 return ret; 869 } 870 871 /* 872 * Abort a call due to a protocol error. 873 */ 874 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 875 struct sk_buff *skb, 876 const char *eproto_why, 877 const char *why, 878 u32 abort_code) 879 { 880 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 881 882 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 883 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 884 } 885 886 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 887 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 888 (abort_why), (abort_code)) 889 890 /* 891 * conn_client.c 892 */ 893 extern unsigned int rxrpc_max_client_connections; 894 extern unsigned int rxrpc_reap_client_connections; 895 extern unsigned long rxrpc_conn_idle_client_expiry; 896 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 897 extern struct idr rxrpc_client_conn_ids; 898 899 void rxrpc_destroy_client_conn_ids(void); 900 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 901 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 902 gfp_t); 903 void rxrpc_expose_client_call(struct rxrpc_call *); 904 void rxrpc_disconnect_client_call(struct rxrpc_call *); 905 void rxrpc_put_client_conn(struct rxrpc_connection *); 906 void rxrpc_discard_expired_client_conns(struct work_struct *); 907 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 908 909 /* 910 * conn_event.c 911 */ 912 void rxrpc_process_connection(struct work_struct *); 913 914 /* 915 * conn_object.c 916 */ 917 extern unsigned int rxrpc_connection_expiry; 918 extern unsigned int rxrpc_closed_conn_expiry; 919 920 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 921 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 922 struct sk_buff *, 923 struct rxrpc_peer **); 924 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 925 void rxrpc_disconnect_call(struct rxrpc_call *); 926 void rxrpc_kill_connection(struct rxrpc_connection *); 927 bool rxrpc_queue_conn(struct rxrpc_connection *); 928 void rxrpc_see_connection(struct rxrpc_connection *); 929 void rxrpc_get_connection(struct rxrpc_connection *); 930 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 931 void rxrpc_put_service_conn(struct rxrpc_connection *); 932 void rxrpc_service_connection_reaper(struct work_struct *); 933 void rxrpc_destroy_all_connections(struct rxrpc_net *); 934 935 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 936 { 937 return conn->out_clientflag; 938 } 939 940 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 941 { 942 return !rxrpc_conn_is_client(conn); 943 } 944 945 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 946 { 947 if (!conn) 948 return; 949 950 if (rxrpc_conn_is_client(conn)) 951 rxrpc_put_client_conn(conn); 952 else 953 rxrpc_put_service_conn(conn); 954 } 955 956 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 957 unsigned long expire_at) 958 { 959 timer_reduce(&conn->timer, expire_at); 960 } 961 962 /* 963 * conn_service.c 964 */ 965 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 966 struct sk_buff *); 967 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 968 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 969 struct rxrpc_connection *, struct sk_buff *); 970 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 971 972 /* 973 * input.c 974 */ 975 int rxrpc_input_packet(struct sock *, struct sk_buff *); 976 977 /* 978 * insecure.c 979 */ 980 extern const struct rxrpc_security rxrpc_no_security; 981 982 /* 983 * key.c 984 */ 985 extern struct key_type key_type_rxrpc; 986 extern struct key_type key_type_rxrpc_s; 987 988 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 989 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 990 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 991 u32); 992 993 /* 994 * local_event.c 995 */ 996 extern void rxrpc_process_local_events(struct rxrpc_local *); 997 998 /* 999 * local_object.c 1000 */ 1001 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 1002 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 1003 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 1004 void rxrpc_put_local(struct rxrpc_local *); 1005 void rxrpc_queue_local(struct rxrpc_local *); 1006 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1007 1008 /* 1009 * misc.c 1010 */ 1011 extern unsigned int rxrpc_max_backlog __read_mostly; 1012 extern unsigned long rxrpc_requested_ack_delay; 1013 extern unsigned long rxrpc_soft_ack_delay; 1014 extern unsigned long rxrpc_idle_ack_delay; 1015 extern unsigned int rxrpc_rx_window_size; 1016 extern unsigned int rxrpc_rx_mtu; 1017 extern unsigned int rxrpc_rx_jumbo_max; 1018 extern unsigned long rxrpc_resend_timeout; 1019 1020 extern const s8 rxrpc_ack_priority[]; 1021 1022 /* 1023 * net_ns.c 1024 */ 1025 extern unsigned int rxrpc_net_id; 1026 extern struct pernet_operations rxrpc_net_ops; 1027 1028 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1029 { 1030 return net_generic(net, rxrpc_net_id); 1031 } 1032 1033 /* 1034 * output.c 1035 */ 1036 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1037 int rxrpc_send_abort_packet(struct rxrpc_call *); 1038 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1039 void rxrpc_reject_packets(struct rxrpc_local *); 1040 void rxrpc_send_keepalive(struct rxrpc_peer *); 1041 1042 /* 1043 * peer_event.c 1044 */ 1045 void rxrpc_error_report(struct sock *); 1046 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1047 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1048 void rxrpc_peer_keepalive_worker(struct work_struct *); 1049 1050 /* 1051 * peer_object.c 1052 */ 1053 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1054 const struct sockaddr_rxrpc *); 1055 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1056 struct sockaddr_rxrpc *, gfp_t); 1057 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1058 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1059 struct rxrpc_peer *); 1060 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1061 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1062 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1063 void rxrpc_put_peer(struct rxrpc_peer *); 1064 1065 /* 1066 * proc.c 1067 */ 1068 extern const struct seq_operations rxrpc_call_seq_ops; 1069 extern const struct seq_operations rxrpc_connection_seq_ops; 1070 extern const struct seq_operations rxrpc_peer_seq_ops; 1071 1072 /* 1073 * recvmsg.c 1074 */ 1075 void rxrpc_notify_socket(struct rxrpc_call *); 1076 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1077 1078 /* 1079 * rxkad.c 1080 */ 1081 #ifdef CONFIG_RXKAD 1082 extern const struct rxrpc_security rxkad; 1083 #endif 1084 1085 /* 1086 * security.c 1087 */ 1088 int __init rxrpc_init_security(void); 1089 void rxrpc_exit_security(void); 1090 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1091 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1092 1093 /* 1094 * sendmsg.c 1095 */ 1096 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1097 1098 /* 1099 * skbuff.c 1100 */ 1101 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1102 void rxrpc_packet_destructor(struct sk_buff *); 1103 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1104 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1105 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1106 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1107 void rxrpc_purge_queue(struct sk_buff_head *); 1108 1109 /* 1110 * sysctl.c 1111 */ 1112 #ifdef CONFIG_SYSCTL 1113 extern int __init rxrpc_sysctl_init(void); 1114 extern void rxrpc_sysctl_exit(void); 1115 #else 1116 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1117 static inline void rxrpc_sysctl_exit(void) {} 1118 #endif 1119 1120 /* 1121 * utils.c 1122 */ 1123 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1124 1125 static inline bool before(u32 seq1, u32 seq2) 1126 { 1127 return (s32)(seq1 - seq2) < 0; 1128 } 1129 static inline bool before_eq(u32 seq1, u32 seq2) 1130 { 1131 return (s32)(seq1 - seq2) <= 0; 1132 } 1133 static inline bool after(u32 seq1, u32 seq2) 1134 { 1135 return (s32)(seq1 - seq2) > 0; 1136 } 1137 static inline bool after_eq(u32 seq1, u32 seq2) 1138 { 1139 return (s32)(seq1 - seq2) >= 0; 1140 } 1141 1142 /* 1143 * debug tracing 1144 */ 1145 extern unsigned int rxrpc_debug; 1146 1147 #define dbgprintk(FMT,...) \ 1148 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1149 1150 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1151 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1152 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1153 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1154 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1155 1156 1157 #if defined(__KDEBUG) 1158 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1159 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1160 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1161 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1162 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1163 1164 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1165 #define RXRPC_DEBUG_KENTER 0x01 1166 #define RXRPC_DEBUG_KLEAVE 0x02 1167 #define RXRPC_DEBUG_KDEBUG 0x04 1168 #define RXRPC_DEBUG_KPROTO 0x08 1169 #define RXRPC_DEBUG_KNET 0x10 1170 1171 #define _enter(FMT,...) \ 1172 do { \ 1173 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1174 kenter(FMT,##__VA_ARGS__); \ 1175 } while (0) 1176 1177 #define _leave(FMT,...) \ 1178 do { \ 1179 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1180 kleave(FMT,##__VA_ARGS__); \ 1181 } while (0) 1182 1183 #define _debug(FMT,...) \ 1184 do { \ 1185 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1186 kdebug(FMT,##__VA_ARGS__); \ 1187 } while (0) 1188 1189 #define _proto(FMT,...) \ 1190 do { \ 1191 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1192 kproto(FMT,##__VA_ARGS__); \ 1193 } while (0) 1194 1195 #define _net(FMT,...) \ 1196 do { \ 1197 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1198 knet(FMT,##__VA_ARGS__); \ 1199 } while (0) 1200 1201 #else 1202 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1203 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1204 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1205 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1206 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1207 #endif 1208 1209 /* 1210 * debug assertion checking 1211 */ 1212 #if 1 // defined(__KDEBUGALL) 1213 1214 #define ASSERT(X) \ 1215 do { \ 1216 if (unlikely(!(X))) { \ 1217 pr_err("Assertion failed\n"); \ 1218 BUG(); \ 1219 } \ 1220 } while (0) 1221 1222 #define ASSERTCMP(X, OP, Y) \ 1223 do { \ 1224 __typeof__(X) _x = (X); \ 1225 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1226 if (unlikely(!(_x OP _y))) { \ 1227 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1228 (unsigned long)_x, (unsigned long)_x, #OP, \ 1229 (unsigned long)_y, (unsigned long)_y); \ 1230 BUG(); \ 1231 } \ 1232 } while (0) 1233 1234 #define ASSERTIF(C, X) \ 1235 do { \ 1236 if (unlikely((C) && !(X))) { \ 1237 pr_err("Assertion failed\n"); \ 1238 BUG(); \ 1239 } \ 1240 } while (0) 1241 1242 #define ASSERTIFCMP(C, X, OP, Y) \ 1243 do { \ 1244 __typeof__(X) _x = (X); \ 1245 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1246 if (unlikely((C) && !(_x OP _y))) { \ 1247 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1248 (unsigned long)_x, (unsigned long)_x, #OP, \ 1249 (unsigned long)_y, (unsigned long)_y); \ 1250 BUG(); \ 1251 } \ 1252 } while (0) 1253 1254 #else 1255 1256 #define ASSERT(X) \ 1257 do { \ 1258 } while (0) 1259 1260 #define ASSERTCMP(X, OP, Y) \ 1261 do { \ 1262 } while (0) 1263 1264 #define ASSERTIF(C, X) \ 1265 do { \ 1266 } while (0) 1267 1268 #define ASSERTIFCMP(C, X, OP, Y) \ 1269 do { \ 1270 } while (0) 1271 1272 #endif /* __KDEBUGALL */ 1273