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 "protocol.h" 16 17 #if 0 18 #define CHECK_SLAB_OKAY(X) \ 19 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 20 (POISON_FREE << 8 | POISON_FREE)) 21 #else 22 #define CHECK_SLAB_OKAY(X) do {} while (0) 23 #endif 24 25 #define FCRYPT_BSIZE 8 26 struct rxrpc_crypt { 27 union { 28 u8 x[FCRYPT_BSIZE]; 29 __be32 n[2]; 30 }; 31 } __attribute__((aligned(8))); 32 33 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 34 #define rxrpc_queue_delayed_work(WS,D) \ 35 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 36 37 struct rxrpc_connection; 38 39 /* 40 * Mark applied to socket buffers in skb->mark. skb->priority is used 41 * to pass supplementary information. 42 */ 43 enum rxrpc_skb_mark { 44 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 45 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 46 }; 47 48 /* 49 * sk_state for RxRPC sockets 50 */ 51 enum { 52 RXRPC_UNBOUND = 0, 53 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 54 RXRPC_CLIENT_BOUND, /* client local address bound */ 55 RXRPC_SERVER_BOUND, /* server local address bound */ 56 RXRPC_SERVER_BOUND2, /* second server local address bound */ 57 RXRPC_SERVER_LISTENING, /* server listening for connections */ 58 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 59 RXRPC_CLOSE, /* socket is being closed */ 60 }; 61 62 /* 63 * Per-network namespace data. 64 */ 65 struct rxrpc_net { 66 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 67 u32 epoch; /* Local epoch for detecting local-end reset */ 68 struct list_head calls; /* List of calls active in this namespace */ 69 rwlock_t call_lock; /* Lock for ->calls */ 70 atomic_t nr_calls; /* Count of allocated calls */ 71 72 atomic_t nr_conns; 73 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 74 struct list_head service_conns; /* Service conns in this namespace */ 75 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 76 struct work_struct service_conn_reaper; 77 struct timer_list service_conn_reap_timer; 78 79 bool live; 80 81 bool kill_all_client_conns; 82 atomic_t nr_client_conns; 83 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 84 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 85 struct list_head idle_client_conns; 86 struct work_struct client_conn_reaper; 87 struct timer_list client_conn_reap_timer; 88 89 struct list_head local_endpoints; 90 struct mutex local_mutex; /* Lock for ->local_endpoints */ 91 92 DECLARE_HASHTABLE (peer_hash, 10); 93 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 94 95 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 96 u8 peer_keepalive_cursor; 97 time64_t peer_keepalive_base; 98 struct list_head peer_keepalive[32]; 99 struct list_head peer_keepalive_new; 100 struct timer_list peer_keepalive_timer; 101 struct work_struct peer_keepalive_work; 102 }; 103 104 /* 105 * Service backlog preallocation. 106 * 107 * This contains circular buffers of preallocated peers, connections and calls 108 * for incoming service calls and their head and tail pointers. This allows 109 * calls to be set up in the data_ready handler, thereby avoiding the need to 110 * shuffle packets around so much. 111 */ 112 struct rxrpc_backlog { 113 unsigned short peer_backlog_head; 114 unsigned short peer_backlog_tail; 115 unsigned short conn_backlog_head; 116 unsigned short conn_backlog_tail; 117 unsigned short call_backlog_head; 118 unsigned short call_backlog_tail; 119 #define RXRPC_BACKLOG_MAX 32 120 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 121 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 122 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 123 }; 124 125 /* 126 * RxRPC socket definition 127 */ 128 struct rxrpc_sock { 129 /* WARNING: sk has to be the first member */ 130 struct sock sk; 131 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 132 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 133 struct rxrpc_local *local; /* local endpoint */ 134 struct rxrpc_backlog *backlog; /* Preallocation for services */ 135 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 136 struct list_head sock_calls; /* List of calls owned by this socket */ 137 struct list_head to_be_accepted; /* calls awaiting acceptance */ 138 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 139 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 140 struct key *key; /* security for this socket */ 141 struct key *securities; /* list of server security descriptors */ 142 struct rb_root calls; /* User ID -> call mapping */ 143 unsigned long flags; 144 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 145 rwlock_t call_lock; /* lock for calls */ 146 u32 min_sec_level; /* minimum security level */ 147 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 148 bool exclusive; /* Exclusive connection for a client socket */ 149 u16 second_service; /* Additional service bound to the endpoint */ 150 struct { 151 /* Service upgrade information */ 152 u16 from; /* Service ID to upgrade (if not 0) */ 153 u16 to; /* service ID to upgrade to */ 154 } service_upgrade; 155 sa_family_t family; /* Protocol family created with */ 156 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 157 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 158 }; 159 160 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 161 162 /* 163 * CPU-byteorder normalised Rx packet header. 164 */ 165 struct rxrpc_host_header { 166 u32 epoch; /* client boot timestamp */ 167 u32 cid; /* connection and channel ID */ 168 u32 callNumber; /* call ID (0 for connection-level packets) */ 169 u32 seq; /* sequence number of pkt in call stream */ 170 u32 serial; /* serial number of pkt sent to network */ 171 u8 type; /* packet type */ 172 u8 flags; /* packet flags */ 173 u8 userStatus; /* app-layer defined status */ 174 u8 securityIndex; /* security protocol ID */ 175 union { 176 u16 _rsvd; /* reserved */ 177 u16 cksum; /* kerberos security checksum */ 178 }; 179 u16 serviceId; /* service ID */ 180 } __packed; 181 182 /* 183 * RxRPC socket buffer private variables 184 * - max 48 bytes (struct sk_buff::cb) 185 */ 186 struct rxrpc_skb_priv { 187 atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 188 u8 nr_subpackets; /* Number of subpackets */ 189 u8 rx_flags; /* Received packet flags */ 190 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 191 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 192 union { 193 int remain; /* amount of space remaining for next write */ 194 195 /* List of requested ACKs on subpackets */ 196 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 197 BITS_PER_LONG]; 198 }; 199 200 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 201 }; 202 203 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 204 205 /* 206 * RxRPC security module interface 207 */ 208 struct rxrpc_security { 209 const char *name; /* name of this service */ 210 u8 security_index; /* security type provided */ 211 u32 no_key_abort; /* Abort code indicating no key */ 212 213 /* Initialise a security service */ 214 int (*init)(void); 215 216 /* Clean up a security service */ 217 void (*exit)(void); 218 219 /* initialise a connection's security */ 220 int (*init_connection_security)(struct rxrpc_connection *); 221 222 /* prime a connection's packet security */ 223 int (*prime_packet_security)(struct rxrpc_connection *); 224 225 /* impose security on a packet */ 226 int (*secure_packet)(struct rxrpc_call *, 227 struct sk_buff *, 228 size_t, 229 void *); 230 231 /* verify the security on a received packet */ 232 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 233 unsigned int, unsigned int, rxrpc_seq_t, u16); 234 235 /* Free crypto request on a call */ 236 void (*free_call_crypto)(struct rxrpc_call *); 237 238 /* Locate the data in a received packet that has been verified. */ 239 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 240 unsigned int *, unsigned int *); 241 242 /* issue a challenge */ 243 int (*issue_challenge)(struct rxrpc_connection *); 244 245 /* respond to a challenge */ 246 int (*respond_to_challenge)(struct rxrpc_connection *, 247 struct sk_buff *, 248 u32 *); 249 250 /* verify a response */ 251 int (*verify_response)(struct rxrpc_connection *, 252 struct sk_buff *, 253 u32 *); 254 255 /* clear connection security */ 256 void (*clear)(struct rxrpc_connection *); 257 }; 258 259 /* 260 * RxRPC local transport endpoint description 261 * - owned by a single AF_RXRPC socket 262 * - pointed to by transport socket struct sk_user_data 263 */ 264 struct rxrpc_local { 265 struct rcu_head rcu; 266 atomic_t active_users; /* Number of users of the local endpoint */ 267 atomic_t usage; /* Number of references to the structure */ 268 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 269 struct list_head link; 270 struct socket *socket; /* my UDP socket */ 271 struct work_struct processor; 272 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 273 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 274 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 275 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 276 struct rb_root client_bundles; /* Client connection bundles by socket params */ 277 spinlock_t client_bundles_lock; /* Lock for client_bundles */ 278 spinlock_t lock; /* access lock */ 279 rwlock_t services_lock; /* lock for services list */ 280 int debug_id; /* debug ID for printks */ 281 bool dead; 282 bool service_closed; /* Service socket closed */ 283 struct sockaddr_rxrpc srx; /* local address */ 284 }; 285 286 /* 287 * RxRPC remote transport endpoint definition 288 * - matched by local endpoint, remote port, address and protocol type 289 */ 290 struct rxrpc_peer { 291 struct rcu_head rcu; /* This must be first */ 292 atomic_t usage; 293 unsigned long hash_key; 294 struct hlist_node hash_link; 295 struct rxrpc_local *local; 296 struct hlist_head error_targets; /* targets for net error distribution */ 297 struct rb_root service_conns; /* Service connections */ 298 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 299 time64_t last_tx_at; /* Last time packet sent here */ 300 seqlock_t service_conn_lock; 301 spinlock_t lock; /* access lock */ 302 unsigned int if_mtu; /* interface MTU for this peer */ 303 unsigned int mtu; /* network MTU for this peer */ 304 unsigned int maxdata; /* data size (MTU - hdrsize) */ 305 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 306 int debug_id; /* debug ID for printks */ 307 struct sockaddr_rxrpc srx; /* remote address */ 308 309 /* calculated RTT cache */ 310 #define RXRPC_RTT_CACHE_SIZE 32 311 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 312 ktime_t rtt_last_req; /* Time of last RTT request */ 313 unsigned int rtt_count; /* Number of samples we've got */ 314 315 u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 316 u32 mdev_us; /* medium deviation */ 317 u32 mdev_max_us; /* maximal mdev for the last rtt period */ 318 u32 rttvar_us; /* smoothed mdev_max */ 319 u32 rto_j; /* Retransmission timeout in jiffies */ 320 u8 backoff; /* Backoff timeout */ 321 322 u8 cong_cwnd; /* Congestion window size */ 323 }; 324 325 /* 326 * Keys for matching a connection. 327 */ 328 struct rxrpc_conn_proto { 329 union { 330 struct { 331 u32 epoch; /* epoch of this connection */ 332 u32 cid; /* connection ID */ 333 }; 334 u64 index_key; 335 }; 336 }; 337 338 struct rxrpc_conn_parameters { 339 struct rxrpc_local *local; /* Representation of local endpoint */ 340 struct rxrpc_peer *peer; /* Remote endpoint */ 341 struct key *key; /* Security details */ 342 bool exclusive; /* T if conn is exclusive */ 343 bool upgrade; /* T if service ID can be upgraded */ 344 u16 service_id; /* Service ID for this connection */ 345 u32 security_level; /* Security level selected */ 346 }; 347 348 /* 349 * Bits in the connection flags. 350 */ 351 enum rxrpc_conn_flag { 352 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 353 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 354 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 355 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 356 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 357 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 358 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 359 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 360 }; 361 362 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 363 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 364 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 365 (1UL << RXRPC_CONN_FINAL_ACK_3)) 366 367 /* 368 * Events that can be raised upon a connection. 369 */ 370 enum rxrpc_conn_event { 371 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 372 }; 373 374 /* 375 * The connection protocol state. 376 */ 377 enum rxrpc_conn_proto_state { 378 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 379 RXRPC_CONN_CLIENT, /* Client connection */ 380 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 381 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 382 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 383 RXRPC_CONN_SERVICE, /* Service secured connection */ 384 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 385 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 386 RXRPC_CONN__NR_STATES 387 }; 388 389 /* 390 * RxRPC client connection bundle. 391 */ 392 struct rxrpc_bundle { 393 struct rxrpc_conn_parameters params; 394 atomic_t usage; 395 unsigned int debug_id; 396 bool try_upgrade; /* True if the bundle is attempting upgrade */ 397 bool alloc_conn; /* True if someone's getting a conn */ 398 short alloc_error; /* Error from last conn allocation */ 399 spinlock_t channel_lock; 400 struct rb_node local_node; /* Node in local->client_conns */ 401 struct list_head waiting_calls; /* Calls waiting for channels */ 402 unsigned long avail_chans; /* Mask of available channels */ 403 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 404 }; 405 406 /* 407 * RxRPC connection definition 408 * - matched by { local, peer, epoch, conn_id, direction } 409 * - each connection can only handle four simultaneous calls 410 */ 411 struct rxrpc_connection { 412 struct rxrpc_conn_proto proto; 413 struct rxrpc_conn_parameters params; 414 415 atomic_t usage; 416 struct rcu_head rcu; 417 struct list_head cache_link; 418 419 unsigned char act_chans; /* Mask of active channels */ 420 struct rxrpc_channel { 421 unsigned long final_ack_at; /* Time at which to issue final ACK */ 422 struct rxrpc_call __rcu *call; /* Active call */ 423 unsigned int call_debug_id; /* call->debug_id */ 424 u32 call_id; /* ID of current call */ 425 u32 call_counter; /* Call ID counter */ 426 u32 last_call; /* ID of last call */ 427 u8 last_type; /* Type of last packet */ 428 union { 429 u32 last_seq; 430 u32 last_abort; 431 }; 432 } channels[RXRPC_MAXCALLS]; 433 434 struct timer_list timer; /* Conn event timer */ 435 struct work_struct processor; /* connection event processor */ 436 struct rxrpc_bundle *bundle; /* Client connection bundle */ 437 struct rb_node service_node; /* Node in peer->service_conns */ 438 struct list_head proc_link; /* link in procfs list */ 439 struct list_head link; /* link in master connection list */ 440 struct sk_buff_head rx_queue; /* received conn-level packets */ 441 const struct rxrpc_security *security; /* applied security module */ 442 struct key *server_key; /* security for this service */ 443 struct crypto_sync_skcipher *cipher; /* encryption handle */ 444 struct rxrpc_crypt csum_iv; /* packet checksum base */ 445 unsigned long flags; 446 unsigned long events; 447 unsigned long idle_timestamp; /* Time at which last became idle */ 448 spinlock_t state_lock; /* state-change lock */ 449 enum rxrpc_conn_proto_state state; /* current state of connection */ 450 u32 abort_code; /* Abort code of connection abort */ 451 int debug_id; /* debug ID for printks */ 452 atomic_t serial; /* packet serial number counter */ 453 unsigned int hi_serial; /* highest serial number received */ 454 u32 security_nonce; /* response re-use preventer */ 455 u32 service_id; /* Service ID, possibly upgraded */ 456 u8 size_align; /* data size alignment (for security) */ 457 u8 security_size; /* security header size */ 458 u8 security_ix; /* security type */ 459 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 460 u8 bundle_shift; /* Index into bundle->avail_chans */ 461 short error; /* Local error code */ 462 }; 463 464 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 465 { 466 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 467 } 468 469 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 470 { 471 return !rxrpc_to_server(sp); 472 } 473 474 /* 475 * Flags in call->flags. 476 */ 477 enum rxrpc_call_flag { 478 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 479 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 480 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 481 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 482 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 483 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 484 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 485 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 486 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 487 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 488 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 489 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 490 RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 491 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 492 }; 493 494 /* 495 * Events that can be raised on a call. 496 */ 497 enum rxrpc_call_event { 498 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 499 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 500 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 501 RXRPC_CALL_EV_PING, /* Ping send required */ 502 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 503 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 504 }; 505 506 /* 507 * The states that a call can be in. 508 */ 509 enum rxrpc_call_state { 510 RXRPC_CALL_UNINITIALISED, 511 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 512 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 513 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 514 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 515 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 516 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 517 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 518 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 519 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 520 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 521 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 522 RXRPC_CALL_COMPLETE, /* - call complete */ 523 NR__RXRPC_CALL_STATES 524 }; 525 526 /* 527 * Call completion condition (state == RXRPC_CALL_COMPLETE). 528 */ 529 enum rxrpc_call_completion { 530 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 531 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 532 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 533 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 534 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 535 NR__RXRPC_CALL_COMPLETIONS 536 }; 537 538 /* 539 * Call Tx congestion management modes. 540 */ 541 enum rxrpc_congest_mode { 542 RXRPC_CALL_SLOW_START, 543 RXRPC_CALL_CONGEST_AVOIDANCE, 544 RXRPC_CALL_PACKET_LOSS, 545 RXRPC_CALL_FAST_RETRANSMIT, 546 NR__RXRPC_CONGEST_MODES 547 }; 548 549 /* 550 * RxRPC call definition 551 * - matched by { connection, call_id } 552 */ 553 struct rxrpc_call { 554 struct rcu_head rcu; 555 struct rxrpc_connection *conn; /* connection carrying call */ 556 struct rxrpc_peer *peer; /* Peer record for remote address */ 557 struct rxrpc_sock __rcu *socket; /* socket responsible */ 558 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 559 const struct rxrpc_security *security; /* applied security module */ 560 struct mutex user_mutex; /* User access mutex */ 561 unsigned long ack_at; /* When deferred ACK needs to happen */ 562 unsigned long ack_lost_at; /* When ACK is figured as lost */ 563 unsigned long resend_at; /* When next resend needs to happen */ 564 unsigned long ping_at; /* When next to send a ping */ 565 unsigned long keepalive_at; /* When next to send a keepalive ping */ 566 unsigned long expect_rx_by; /* When we expect to get a packet by */ 567 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 568 unsigned long expect_term_by; /* When we expect call termination by */ 569 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 570 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 571 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 572 struct timer_list timer; /* Combined event timer */ 573 struct work_struct processor; /* Event processor */ 574 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 575 struct list_head link; /* link in master call list */ 576 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 577 struct hlist_node error_link; /* link in error distribution list */ 578 struct list_head accept_link; /* Link in rx->acceptq */ 579 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 580 struct list_head sock_link; /* Link in rx->sock_calls */ 581 struct rb_node sock_node; /* Node in rx->calls */ 582 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 583 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 584 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 585 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 586 unsigned long user_call_ID; /* user-defined call ID */ 587 unsigned long flags; 588 unsigned long events; 589 spinlock_t lock; 590 spinlock_t notify_lock; /* Kernel notification lock */ 591 rwlock_t state_lock; /* lock for state transition */ 592 u32 abort_code; /* Local/remote abort code */ 593 int error; /* Local error incurred */ 594 enum rxrpc_call_state state; /* current state of call */ 595 enum rxrpc_call_completion completion; /* Call completion condition */ 596 atomic_t usage; 597 u16 service_id; /* service ID */ 598 u8 security_ix; /* Security type */ 599 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 600 u32 call_id; /* call ID on connection */ 601 u32 cid; /* connection ID plus channel index */ 602 int debug_id; /* debug ID for printks */ 603 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 604 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 605 bool rx_pkt_last; /* Current recvmsg packet is last */ 606 607 /* Rx/Tx circular buffer, depending on phase. 608 * 609 * In the Rx phase, packets are annotated with 0 or the number of the 610 * segment of a jumbo packet each buffer refers to. There can be up to 611 * 47 segments in a maximum-size UDP packet. 612 * 613 * In the Tx phase, packets are annotated with which buffers have been 614 * acked. 615 */ 616 #define RXRPC_RXTX_BUFF_SIZE 64 617 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 618 #define RXRPC_INIT_RX_WINDOW_SIZE 63 619 struct sk_buff **rxtx_buffer; 620 u8 *rxtx_annotations; 621 #define RXRPC_TX_ANNO_ACK 0 622 #define RXRPC_TX_ANNO_UNACK 1 623 #define RXRPC_TX_ANNO_NAK 2 624 #define RXRPC_TX_ANNO_RETRANS 3 625 #define RXRPC_TX_ANNO_MASK 0x03 626 #define RXRPC_TX_ANNO_LAST 0x04 627 #define RXRPC_TX_ANNO_RESENT 0x08 628 629 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 630 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 631 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 632 * not hard-ACK'd packet follows this. 633 */ 634 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 635 u16 tx_backoff; /* Delay to insert due to Tx failure */ 636 637 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 638 * is fixed, we keep these numbers in terms of segments (ie. DATA 639 * packets) rather than bytes. 640 */ 641 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 642 u8 cong_cwnd; /* Congestion window size */ 643 u8 cong_extra; /* Extra to send for congestion management */ 644 u8 cong_ssthresh; /* Slow-start threshold */ 645 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 646 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 647 u8 cong_cumul_acks; /* Cumulative ACK count */ 648 ktime_t cong_tstamp; /* Last time cwnd was changed */ 649 650 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 651 * consumed packet follows this. 652 */ 653 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 654 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 655 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 656 u8 rx_winsize; /* Size of Rx window */ 657 u8 tx_winsize; /* Maximum size of Tx window */ 658 bool tx_phase; /* T if transmission phase, F if receive phase */ 659 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 660 661 spinlock_t input_lock; /* Lock for packet input to this call */ 662 663 /* receive-phase ACK management */ 664 u8 ackr_reason; /* reason to ACK */ 665 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 666 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 667 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 668 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 669 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 670 671 /* RTT management */ 672 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 673 ktime_t rtt_sent_at[4]; /* Time packet sent */ 674 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 675 * Mask of pending samples in 8-11 */ 676 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 677 #define RXRPC_CALL_RTT_PEND_SHIFT 8 678 679 /* transmission-phase ACK management */ 680 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 681 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 682 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 683 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 684 }; 685 686 /* 687 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 688 */ 689 struct rxrpc_ack_summary { 690 u8 ack_reason; 691 u8 nr_acks; /* Number of ACKs in packet */ 692 u8 nr_nacks; /* Number of NACKs in packet */ 693 u8 nr_new_acks; /* Number of new ACKs in packet */ 694 u8 nr_new_nacks; /* Number of new NACKs in packet */ 695 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 696 bool new_low_nack; /* T if new low NACK found */ 697 bool retrans_timeo; /* T if reTx due to timeout happened */ 698 u8 flight_size; /* Number of unreceived transmissions */ 699 /* Place to stash values for tracing */ 700 enum rxrpc_congest_mode mode:8; 701 u8 cwnd; 702 u8 ssthresh; 703 u8 dup_acks; 704 u8 cumulative_acks; 705 }; 706 707 /* 708 * sendmsg() cmsg-specified parameters. 709 */ 710 enum rxrpc_command { 711 RXRPC_CMD_SEND_DATA, /* send data message */ 712 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 713 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 714 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 715 }; 716 717 struct rxrpc_call_params { 718 s64 tx_total_len; /* Total Tx data length (if send data) */ 719 unsigned long user_call_ID; /* User's call ID */ 720 struct { 721 u32 hard; /* Maximum lifetime (sec) */ 722 u32 idle; /* Max time since last data packet (msec) */ 723 u32 normal; /* Max time since last call packet (msec) */ 724 } timeouts; 725 u8 nr_timeouts; /* Number of timeouts specified */ 726 bool kernel; /* T if kernel is making the call */ 727 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 728 }; 729 730 struct rxrpc_send_params { 731 struct rxrpc_call_params call; 732 u32 abort_code; /* Abort code to Tx (if abort) */ 733 enum rxrpc_command command : 8; /* The command to implement */ 734 bool exclusive; /* Shared or exclusive call */ 735 bool upgrade; /* If the connection is upgradeable */ 736 }; 737 738 #include <trace/events/rxrpc.h> 739 740 /* 741 * af_rxrpc.c 742 */ 743 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 744 extern struct workqueue_struct *rxrpc_workqueue; 745 746 /* 747 * call_accept.c 748 */ 749 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 750 void rxrpc_discard_prealloc(struct rxrpc_sock *); 751 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 752 struct rxrpc_sock *, 753 struct sk_buff *); 754 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 755 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 756 rxrpc_notify_rx_t); 757 int rxrpc_reject_call(struct rxrpc_sock *); 758 759 /* 760 * call_event.c 761 */ 762 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 763 enum rxrpc_propose_ack_trace); 764 void rxrpc_process_call(struct work_struct *); 765 766 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 767 unsigned long expire_at, 768 unsigned long now, 769 enum rxrpc_timer_trace why) 770 { 771 trace_rxrpc_timer(call, why, now); 772 timer_reduce(&call->timer, expire_at); 773 } 774 775 /* 776 * call_object.c 777 */ 778 extern const char *const rxrpc_call_states[]; 779 extern const char *const rxrpc_call_completions[]; 780 extern unsigned int rxrpc_max_call_lifetime; 781 extern struct kmem_cache *rxrpc_call_jar; 782 783 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 784 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 785 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 786 struct rxrpc_conn_parameters *, 787 struct sockaddr_rxrpc *, 788 struct rxrpc_call_params *, gfp_t, 789 unsigned int); 790 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 791 struct sk_buff *); 792 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 793 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 794 bool __rxrpc_queue_call(struct rxrpc_call *); 795 bool rxrpc_queue_call(struct rxrpc_call *); 796 void rxrpc_see_call(struct rxrpc_call *); 797 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 798 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 799 void rxrpc_cleanup_call(struct rxrpc_call *); 800 void rxrpc_destroy_all_calls(struct rxrpc_net *); 801 802 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 803 { 804 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 805 } 806 807 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 808 { 809 return !rxrpc_is_service_call(call); 810 } 811 812 /* 813 * conn_client.c 814 */ 815 extern unsigned int rxrpc_reap_client_connections; 816 extern unsigned long rxrpc_conn_idle_client_expiry; 817 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 818 extern struct idr rxrpc_client_conn_ids; 819 820 void rxrpc_destroy_client_conn_ids(void); 821 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 822 void rxrpc_put_bundle(struct rxrpc_bundle *); 823 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 824 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 825 gfp_t); 826 void rxrpc_expose_client_call(struct rxrpc_call *); 827 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 828 void rxrpc_put_client_conn(struct rxrpc_connection *); 829 void rxrpc_discard_expired_client_conns(struct work_struct *); 830 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 831 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 832 833 /* 834 * conn_event.c 835 */ 836 void rxrpc_process_connection(struct work_struct *); 837 838 /* 839 * conn_object.c 840 */ 841 extern unsigned int rxrpc_connection_expiry; 842 extern unsigned int rxrpc_closed_conn_expiry; 843 844 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 845 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 846 struct sk_buff *, 847 struct rxrpc_peer **); 848 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 849 void rxrpc_disconnect_call(struct rxrpc_call *); 850 void rxrpc_kill_connection(struct rxrpc_connection *); 851 bool rxrpc_queue_conn(struct rxrpc_connection *); 852 void rxrpc_see_connection(struct rxrpc_connection *); 853 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 854 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 855 void rxrpc_put_service_conn(struct rxrpc_connection *); 856 void rxrpc_service_connection_reaper(struct work_struct *); 857 void rxrpc_destroy_all_connections(struct rxrpc_net *); 858 859 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 860 { 861 return conn->out_clientflag; 862 } 863 864 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 865 { 866 return !rxrpc_conn_is_client(conn); 867 } 868 869 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 870 { 871 if (!conn) 872 return; 873 874 if (rxrpc_conn_is_client(conn)) 875 rxrpc_put_client_conn(conn); 876 else 877 rxrpc_put_service_conn(conn); 878 } 879 880 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 881 unsigned long expire_at) 882 { 883 timer_reduce(&conn->timer, expire_at); 884 } 885 886 /* 887 * conn_service.c 888 */ 889 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 890 struct sk_buff *); 891 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 892 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 893 const struct rxrpc_security *, struct key *, 894 struct sk_buff *); 895 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 896 897 /* 898 * input.c 899 */ 900 int rxrpc_input_packet(struct sock *, struct sk_buff *); 901 902 /* 903 * insecure.c 904 */ 905 extern const struct rxrpc_security rxrpc_no_security; 906 907 /* 908 * key.c 909 */ 910 extern struct key_type key_type_rxrpc; 911 extern struct key_type key_type_rxrpc_s; 912 913 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 914 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 915 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 916 u32); 917 918 /* 919 * local_event.c 920 */ 921 extern void rxrpc_process_local_events(struct rxrpc_local *); 922 923 /* 924 * local_object.c 925 */ 926 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 927 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 928 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 929 void rxrpc_put_local(struct rxrpc_local *); 930 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 931 void rxrpc_unuse_local(struct rxrpc_local *); 932 void rxrpc_queue_local(struct rxrpc_local *); 933 void rxrpc_destroy_all_locals(struct rxrpc_net *); 934 935 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 936 { 937 return atomic_dec_return(&local->active_users) == 0; 938 } 939 940 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 941 { 942 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 943 } 944 945 /* 946 * misc.c 947 */ 948 extern unsigned int rxrpc_max_backlog __read_mostly; 949 extern unsigned long rxrpc_requested_ack_delay; 950 extern unsigned long rxrpc_soft_ack_delay; 951 extern unsigned long rxrpc_idle_ack_delay; 952 extern unsigned int rxrpc_rx_window_size; 953 extern unsigned int rxrpc_rx_mtu; 954 extern unsigned int rxrpc_rx_jumbo_max; 955 956 extern const s8 rxrpc_ack_priority[]; 957 958 /* 959 * net_ns.c 960 */ 961 extern unsigned int rxrpc_net_id; 962 extern struct pernet_operations rxrpc_net_ops; 963 964 static inline struct rxrpc_net *rxrpc_net(struct net *net) 965 { 966 return net_generic(net, rxrpc_net_id); 967 } 968 969 /* 970 * output.c 971 */ 972 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 973 int rxrpc_send_abort_packet(struct rxrpc_call *); 974 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 975 void rxrpc_reject_packets(struct rxrpc_local *); 976 void rxrpc_send_keepalive(struct rxrpc_peer *); 977 978 /* 979 * peer_event.c 980 */ 981 void rxrpc_error_report(struct sock *); 982 void rxrpc_peer_keepalive_worker(struct work_struct *); 983 984 /* 985 * peer_object.c 986 */ 987 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 988 const struct sockaddr_rxrpc *); 989 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 990 struct sockaddr_rxrpc *, gfp_t); 991 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 992 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 993 struct rxrpc_peer *); 994 void rxrpc_destroy_all_peers(struct rxrpc_net *); 995 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 996 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 997 void rxrpc_put_peer(struct rxrpc_peer *); 998 void rxrpc_put_peer_locked(struct rxrpc_peer *); 999 1000 /* 1001 * proc.c 1002 */ 1003 extern const struct seq_operations rxrpc_call_seq_ops; 1004 extern const struct seq_operations rxrpc_connection_seq_ops; 1005 extern const struct seq_operations rxrpc_peer_seq_ops; 1006 1007 /* 1008 * recvmsg.c 1009 */ 1010 void rxrpc_notify_socket(struct rxrpc_call *); 1011 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1012 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1013 bool __rxrpc_call_completed(struct rxrpc_call *); 1014 bool rxrpc_call_completed(struct rxrpc_call *); 1015 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1016 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1017 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1018 1019 /* 1020 * Abort a call due to a protocol error. 1021 */ 1022 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1023 struct sk_buff *skb, 1024 const char *eproto_why, 1025 const char *why, 1026 u32 abort_code) 1027 { 1028 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1029 1030 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1031 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1032 } 1033 1034 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1035 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1036 (abort_why), (abort_code)) 1037 1038 /* 1039 * rtt.c 1040 */ 1041 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1042 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1043 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1044 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1045 1046 /* 1047 * rxkad.c 1048 */ 1049 #ifdef CONFIG_RXKAD 1050 extern const struct rxrpc_security rxkad; 1051 #endif 1052 1053 /* 1054 * security.c 1055 */ 1056 int __init rxrpc_init_security(void); 1057 void rxrpc_exit_security(void); 1058 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1059 bool rxrpc_look_up_server_security(struct rxrpc_local *, struct rxrpc_sock *, 1060 const struct rxrpc_security **, struct key **, 1061 struct sk_buff *); 1062 1063 /* 1064 * sendmsg.c 1065 */ 1066 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1067 1068 /* 1069 * skbuff.c 1070 */ 1071 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1072 void rxrpc_packet_destructor(struct sk_buff *); 1073 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1074 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1075 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1076 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1077 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1078 void rxrpc_purge_queue(struct sk_buff_head *); 1079 1080 /* 1081 * sysctl.c 1082 */ 1083 #ifdef CONFIG_SYSCTL 1084 extern int __init rxrpc_sysctl_init(void); 1085 extern void rxrpc_sysctl_exit(void); 1086 #else 1087 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1088 static inline void rxrpc_sysctl_exit(void) {} 1089 #endif 1090 1091 /* 1092 * utils.c 1093 */ 1094 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1095 1096 static inline bool before(u32 seq1, u32 seq2) 1097 { 1098 return (s32)(seq1 - seq2) < 0; 1099 } 1100 static inline bool before_eq(u32 seq1, u32 seq2) 1101 { 1102 return (s32)(seq1 - seq2) <= 0; 1103 } 1104 static inline bool after(u32 seq1, u32 seq2) 1105 { 1106 return (s32)(seq1 - seq2) > 0; 1107 } 1108 static inline bool after_eq(u32 seq1, u32 seq2) 1109 { 1110 return (s32)(seq1 - seq2) >= 0; 1111 } 1112 1113 /* 1114 * debug tracing 1115 */ 1116 extern unsigned int rxrpc_debug; 1117 1118 #define dbgprintk(FMT,...) \ 1119 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1120 1121 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1122 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1123 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1124 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1125 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1126 1127 1128 #if defined(__KDEBUG) 1129 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1130 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1131 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1132 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1133 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1134 1135 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1136 #define RXRPC_DEBUG_KENTER 0x01 1137 #define RXRPC_DEBUG_KLEAVE 0x02 1138 #define RXRPC_DEBUG_KDEBUG 0x04 1139 #define RXRPC_DEBUG_KPROTO 0x08 1140 #define RXRPC_DEBUG_KNET 0x10 1141 1142 #define _enter(FMT,...) \ 1143 do { \ 1144 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1145 kenter(FMT,##__VA_ARGS__); \ 1146 } while (0) 1147 1148 #define _leave(FMT,...) \ 1149 do { \ 1150 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1151 kleave(FMT,##__VA_ARGS__); \ 1152 } while (0) 1153 1154 #define _debug(FMT,...) \ 1155 do { \ 1156 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1157 kdebug(FMT,##__VA_ARGS__); \ 1158 } while (0) 1159 1160 #define _proto(FMT,...) \ 1161 do { \ 1162 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1163 kproto(FMT,##__VA_ARGS__); \ 1164 } while (0) 1165 1166 #define _net(FMT,...) \ 1167 do { \ 1168 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1169 knet(FMT,##__VA_ARGS__); \ 1170 } while (0) 1171 1172 #else 1173 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1174 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1175 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1176 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1177 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1178 #endif 1179 1180 /* 1181 * debug assertion checking 1182 */ 1183 #if 1 // defined(__KDEBUGALL) 1184 1185 #define ASSERT(X) \ 1186 do { \ 1187 if (unlikely(!(X))) { \ 1188 pr_err("Assertion failed\n"); \ 1189 BUG(); \ 1190 } \ 1191 } while (0) 1192 1193 #define ASSERTCMP(X, OP, Y) \ 1194 do { \ 1195 __typeof__(X) _x = (X); \ 1196 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1197 if (unlikely(!(_x OP _y))) { \ 1198 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1199 (unsigned long)_x, (unsigned long)_x, #OP, \ 1200 (unsigned long)_y, (unsigned long)_y); \ 1201 BUG(); \ 1202 } \ 1203 } while (0) 1204 1205 #define ASSERTIF(C, X) \ 1206 do { \ 1207 if (unlikely((C) && !(X))) { \ 1208 pr_err("Assertion failed\n"); \ 1209 BUG(); \ 1210 } \ 1211 } while (0) 1212 1213 #define ASSERTIFCMP(C, X, OP, Y) \ 1214 do { \ 1215 __typeof__(X) _x = (X); \ 1216 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1217 if (unlikely((C) && !(_x OP _y))) { \ 1218 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1219 (unsigned long)_x, (unsigned long)_x, #OP, \ 1220 (unsigned long)_y, (unsigned long)_y); \ 1221 BUG(); \ 1222 } \ 1223 } while (0) 1224 1225 #else 1226 1227 #define ASSERT(X) \ 1228 do { \ 1229 } while (0) 1230 1231 #define ASSERTCMP(X, OP, Y) \ 1232 do { \ 1233 } while (0) 1234 1235 #define ASSERTIF(C, X) \ 1236 do { \ 1237 } while (0) 1238 1239 #define ASSERTIFCMP(C, X, OP, Y) \ 1240 do { \ 1241 } while (0) 1242 1243 #endif /* __KDEBUGALL */ 1244