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_RECV_REQUEST, /* - server receiving request */ 518 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 519 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 520 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 521 RXRPC_CALL_COMPLETE, /* - call complete */ 522 NR__RXRPC_CALL_STATES 523 }; 524 525 /* 526 * Call completion condition (state == RXRPC_CALL_COMPLETE). 527 */ 528 enum rxrpc_call_completion { 529 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 530 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 531 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 532 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 533 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 534 NR__RXRPC_CALL_COMPLETIONS 535 }; 536 537 /* 538 * Call Tx congestion management modes. 539 */ 540 enum rxrpc_congest_mode { 541 RXRPC_CALL_SLOW_START, 542 RXRPC_CALL_CONGEST_AVOIDANCE, 543 RXRPC_CALL_PACKET_LOSS, 544 RXRPC_CALL_FAST_RETRANSMIT, 545 NR__RXRPC_CONGEST_MODES 546 }; 547 548 /* 549 * RxRPC call definition 550 * - matched by { connection, call_id } 551 */ 552 struct rxrpc_call { 553 struct rcu_head rcu; 554 struct rxrpc_connection *conn; /* connection carrying call */ 555 struct rxrpc_peer *peer; /* Peer record for remote address */ 556 struct rxrpc_sock __rcu *socket; /* socket responsible */ 557 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 558 const struct rxrpc_security *security; /* applied security module */ 559 struct mutex user_mutex; /* User access mutex */ 560 unsigned long ack_at; /* When deferred ACK needs to happen */ 561 unsigned long ack_lost_at; /* When ACK is figured as lost */ 562 unsigned long resend_at; /* When next resend needs to happen */ 563 unsigned long ping_at; /* When next to send a ping */ 564 unsigned long keepalive_at; /* When next to send a keepalive ping */ 565 unsigned long expect_rx_by; /* When we expect to get a packet by */ 566 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 567 unsigned long expect_term_by; /* When we expect call termination by */ 568 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 569 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 570 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 571 struct timer_list timer; /* Combined event timer */ 572 struct work_struct processor; /* Event processor */ 573 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 574 struct list_head link; /* link in master call list */ 575 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 576 struct hlist_node error_link; /* link in error distribution list */ 577 struct list_head accept_link; /* Link in rx->acceptq */ 578 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 579 struct list_head sock_link; /* Link in rx->sock_calls */ 580 struct rb_node sock_node; /* Node in rx->calls */ 581 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 582 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 583 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 584 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 585 unsigned long user_call_ID; /* user-defined call ID */ 586 unsigned long flags; 587 unsigned long events; 588 spinlock_t lock; 589 spinlock_t notify_lock; /* Kernel notification lock */ 590 rwlock_t state_lock; /* lock for state transition */ 591 u32 abort_code; /* Local/remote abort code */ 592 int error; /* Local error incurred */ 593 enum rxrpc_call_state state; /* current state of call */ 594 enum rxrpc_call_completion completion; /* Call completion condition */ 595 atomic_t usage; 596 u16 service_id; /* service ID */ 597 u8 security_ix; /* Security type */ 598 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 599 u32 call_id; /* call ID on connection */ 600 u32 cid; /* connection ID plus channel index */ 601 int debug_id; /* debug ID for printks */ 602 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 603 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 604 bool rx_pkt_last; /* Current recvmsg packet is last */ 605 606 /* Rx/Tx circular buffer, depending on phase. 607 * 608 * In the Rx phase, packets are annotated with 0 or the number of the 609 * segment of a jumbo packet each buffer refers to. There can be up to 610 * 47 segments in a maximum-size UDP packet. 611 * 612 * In the Tx phase, packets are annotated with which buffers have been 613 * acked. 614 */ 615 #define RXRPC_RXTX_BUFF_SIZE 64 616 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 617 #define RXRPC_INIT_RX_WINDOW_SIZE 63 618 struct sk_buff **rxtx_buffer; 619 u8 *rxtx_annotations; 620 #define RXRPC_TX_ANNO_ACK 0 621 #define RXRPC_TX_ANNO_UNACK 1 622 #define RXRPC_TX_ANNO_NAK 2 623 #define RXRPC_TX_ANNO_RETRANS 3 624 #define RXRPC_TX_ANNO_MASK 0x03 625 #define RXRPC_TX_ANNO_LAST 0x04 626 #define RXRPC_TX_ANNO_RESENT 0x08 627 628 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 629 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 630 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 631 * not hard-ACK'd packet follows this. 632 */ 633 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 634 u16 tx_backoff; /* Delay to insert due to Tx failure */ 635 636 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 637 * is fixed, we keep these numbers in terms of segments (ie. DATA 638 * packets) rather than bytes. 639 */ 640 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 641 u8 cong_cwnd; /* Congestion window size */ 642 u8 cong_extra; /* Extra to send for congestion management */ 643 u8 cong_ssthresh; /* Slow-start threshold */ 644 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 645 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 646 u8 cong_cumul_acks; /* Cumulative ACK count */ 647 ktime_t cong_tstamp; /* Last time cwnd was changed */ 648 649 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 650 * consumed packet follows this. 651 */ 652 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 653 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 654 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 655 u8 rx_winsize; /* Size of Rx window */ 656 u8 tx_winsize; /* Maximum size of Tx window */ 657 bool tx_phase; /* T if transmission phase, F if receive phase */ 658 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 659 660 spinlock_t input_lock; /* Lock for packet input to this call */ 661 662 /* receive-phase ACK management */ 663 u8 ackr_reason; /* reason to ACK */ 664 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 665 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 666 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 667 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 668 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 669 670 /* RTT management */ 671 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 672 ktime_t rtt_sent_at[4]; /* Time packet sent */ 673 unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 674 * Mask of pending samples in 8-11 */ 675 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 676 #define RXRPC_CALL_RTT_PEND_SHIFT 8 677 678 /* transmission-phase ACK management */ 679 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 680 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 681 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 682 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 683 }; 684 685 /* 686 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 687 */ 688 struct rxrpc_ack_summary { 689 u8 ack_reason; 690 u8 nr_acks; /* Number of ACKs in packet */ 691 u8 nr_nacks; /* Number of NACKs in packet */ 692 u8 nr_new_acks; /* Number of new ACKs in packet */ 693 u8 nr_new_nacks; /* Number of new NACKs in packet */ 694 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 695 bool new_low_nack; /* T if new low NACK found */ 696 bool retrans_timeo; /* T if reTx due to timeout happened */ 697 u8 flight_size; /* Number of unreceived transmissions */ 698 /* Place to stash values for tracing */ 699 enum rxrpc_congest_mode mode:8; 700 u8 cwnd; 701 u8 ssthresh; 702 u8 dup_acks; 703 u8 cumulative_acks; 704 }; 705 706 /* 707 * sendmsg() cmsg-specified parameters. 708 */ 709 enum rxrpc_command { 710 RXRPC_CMD_SEND_DATA, /* send data message */ 711 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 712 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 713 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 714 }; 715 716 struct rxrpc_call_params { 717 s64 tx_total_len; /* Total Tx data length (if send data) */ 718 unsigned long user_call_ID; /* User's call ID */ 719 struct { 720 u32 hard; /* Maximum lifetime (sec) */ 721 u32 idle; /* Max time since last data packet (msec) */ 722 u32 normal; /* Max time since last call packet (msec) */ 723 } timeouts; 724 u8 nr_timeouts; /* Number of timeouts specified */ 725 bool kernel; /* T if kernel is making the call */ 726 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 727 }; 728 729 struct rxrpc_send_params { 730 struct rxrpc_call_params call; 731 u32 abort_code; /* Abort code to Tx (if abort) */ 732 enum rxrpc_command command : 8; /* The command to implement */ 733 bool exclusive; /* Shared or exclusive call */ 734 bool upgrade; /* If the connection is upgradeable */ 735 }; 736 737 #include <trace/events/rxrpc.h> 738 739 /* 740 * af_rxrpc.c 741 */ 742 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 743 extern struct workqueue_struct *rxrpc_workqueue; 744 745 /* 746 * call_accept.c 747 */ 748 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 749 void rxrpc_discard_prealloc(struct rxrpc_sock *); 750 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 751 struct rxrpc_sock *, 752 struct sk_buff *); 753 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 754 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 755 756 /* 757 * call_event.c 758 */ 759 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 760 enum rxrpc_propose_ack_trace); 761 void rxrpc_process_call(struct work_struct *); 762 763 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 764 unsigned long expire_at, 765 unsigned long now, 766 enum rxrpc_timer_trace why) 767 { 768 trace_rxrpc_timer(call, why, now); 769 timer_reduce(&call->timer, expire_at); 770 } 771 772 /* 773 * call_object.c 774 */ 775 extern const char *const rxrpc_call_states[]; 776 extern const char *const rxrpc_call_completions[]; 777 extern unsigned int rxrpc_max_call_lifetime; 778 extern struct kmem_cache *rxrpc_call_jar; 779 780 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 781 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 782 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 783 struct rxrpc_conn_parameters *, 784 struct sockaddr_rxrpc *, 785 struct rxrpc_call_params *, gfp_t, 786 unsigned int); 787 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 788 struct sk_buff *); 789 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 790 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 791 bool __rxrpc_queue_call(struct rxrpc_call *); 792 bool rxrpc_queue_call(struct rxrpc_call *); 793 void rxrpc_see_call(struct rxrpc_call *); 794 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 795 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 796 void rxrpc_cleanup_call(struct rxrpc_call *); 797 void rxrpc_destroy_all_calls(struct rxrpc_net *); 798 799 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 800 { 801 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 802 } 803 804 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 805 { 806 return !rxrpc_is_service_call(call); 807 } 808 809 /* 810 * conn_client.c 811 */ 812 extern unsigned int rxrpc_reap_client_connections; 813 extern unsigned long rxrpc_conn_idle_client_expiry; 814 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 815 extern struct idr rxrpc_client_conn_ids; 816 817 void rxrpc_destroy_client_conn_ids(void); 818 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 819 void rxrpc_put_bundle(struct rxrpc_bundle *); 820 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 821 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 822 gfp_t); 823 void rxrpc_expose_client_call(struct rxrpc_call *); 824 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 825 void rxrpc_put_client_conn(struct rxrpc_connection *); 826 void rxrpc_discard_expired_client_conns(struct work_struct *); 827 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 828 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 829 830 /* 831 * conn_event.c 832 */ 833 void rxrpc_process_connection(struct work_struct *); 834 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 835 836 /* 837 * conn_object.c 838 */ 839 extern unsigned int rxrpc_connection_expiry; 840 extern unsigned int rxrpc_closed_conn_expiry; 841 842 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 843 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 844 struct sk_buff *, 845 struct rxrpc_peer **); 846 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 847 void rxrpc_disconnect_call(struct rxrpc_call *); 848 void rxrpc_kill_connection(struct rxrpc_connection *); 849 bool rxrpc_queue_conn(struct rxrpc_connection *); 850 void rxrpc_see_connection(struct rxrpc_connection *); 851 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 852 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 853 void rxrpc_put_service_conn(struct rxrpc_connection *); 854 void rxrpc_service_connection_reaper(struct work_struct *); 855 void rxrpc_destroy_all_connections(struct rxrpc_net *); 856 857 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 858 { 859 return conn->out_clientflag; 860 } 861 862 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 863 { 864 return !rxrpc_conn_is_client(conn); 865 } 866 867 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 868 { 869 if (!conn) 870 return; 871 872 if (rxrpc_conn_is_client(conn)) 873 rxrpc_put_client_conn(conn); 874 else 875 rxrpc_put_service_conn(conn); 876 } 877 878 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 879 unsigned long expire_at) 880 { 881 timer_reduce(&conn->timer, expire_at); 882 } 883 884 /* 885 * conn_service.c 886 */ 887 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 888 struct sk_buff *); 889 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 890 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 891 const struct rxrpc_security *, struct key *, 892 struct sk_buff *); 893 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 894 895 /* 896 * input.c 897 */ 898 int rxrpc_input_packet(struct sock *, struct sk_buff *); 899 900 /* 901 * insecure.c 902 */ 903 extern const struct rxrpc_security rxrpc_no_security; 904 905 /* 906 * key.c 907 */ 908 extern struct key_type key_type_rxrpc; 909 extern struct key_type key_type_rxrpc_s; 910 911 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 912 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 913 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 914 u32); 915 916 /* 917 * local_event.c 918 */ 919 extern void rxrpc_process_local_events(struct rxrpc_local *); 920 921 /* 922 * local_object.c 923 */ 924 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 925 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 926 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 927 void rxrpc_put_local(struct rxrpc_local *); 928 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 929 void rxrpc_unuse_local(struct rxrpc_local *); 930 void rxrpc_queue_local(struct rxrpc_local *); 931 void rxrpc_destroy_all_locals(struct rxrpc_net *); 932 933 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 934 { 935 return atomic_dec_return(&local->active_users) == 0; 936 } 937 938 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 939 { 940 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 941 } 942 943 /* 944 * misc.c 945 */ 946 extern unsigned int rxrpc_max_backlog __read_mostly; 947 extern unsigned long rxrpc_requested_ack_delay; 948 extern unsigned long rxrpc_soft_ack_delay; 949 extern unsigned long rxrpc_idle_ack_delay; 950 extern unsigned int rxrpc_rx_window_size; 951 extern unsigned int rxrpc_rx_mtu; 952 extern unsigned int rxrpc_rx_jumbo_max; 953 954 extern const s8 rxrpc_ack_priority[]; 955 956 /* 957 * net_ns.c 958 */ 959 extern unsigned int rxrpc_net_id; 960 extern struct pernet_operations rxrpc_net_ops; 961 962 static inline struct rxrpc_net *rxrpc_net(struct net *net) 963 { 964 return net_generic(net, rxrpc_net_id); 965 } 966 967 /* 968 * output.c 969 */ 970 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 971 int rxrpc_send_abort_packet(struct rxrpc_call *); 972 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 973 void rxrpc_reject_packets(struct rxrpc_local *); 974 void rxrpc_send_keepalive(struct rxrpc_peer *); 975 976 /* 977 * peer_event.c 978 */ 979 void rxrpc_error_report(struct sock *); 980 void rxrpc_peer_keepalive_worker(struct work_struct *); 981 982 /* 983 * peer_object.c 984 */ 985 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 986 const struct sockaddr_rxrpc *); 987 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 988 struct sockaddr_rxrpc *, gfp_t); 989 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 990 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 991 struct rxrpc_peer *); 992 void rxrpc_destroy_all_peers(struct rxrpc_net *); 993 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 994 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 995 void rxrpc_put_peer(struct rxrpc_peer *); 996 void rxrpc_put_peer_locked(struct rxrpc_peer *); 997 998 /* 999 * proc.c 1000 */ 1001 extern const struct seq_operations rxrpc_call_seq_ops; 1002 extern const struct seq_operations rxrpc_connection_seq_ops; 1003 extern const struct seq_operations rxrpc_peer_seq_ops; 1004 1005 /* 1006 * recvmsg.c 1007 */ 1008 void rxrpc_notify_socket(struct rxrpc_call *); 1009 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1010 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1011 bool __rxrpc_call_completed(struct rxrpc_call *); 1012 bool rxrpc_call_completed(struct rxrpc_call *); 1013 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1014 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1015 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1016 1017 /* 1018 * Abort a call due to a protocol error. 1019 */ 1020 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1021 struct sk_buff *skb, 1022 const char *eproto_why, 1023 const char *why, 1024 u32 abort_code) 1025 { 1026 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1027 1028 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1029 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1030 } 1031 1032 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1033 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1034 (abort_why), (abort_code)) 1035 1036 /* 1037 * rtt.c 1038 */ 1039 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1040 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1041 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1042 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1043 1044 /* 1045 * rxkad.c 1046 */ 1047 #ifdef CONFIG_RXKAD 1048 extern const struct rxrpc_security rxkad; 1049 #endif 1050 1051 /* 1052 * security.c 1053 */ 1054 int __init rxrpc_init_security(void); 1055 void rxrpc_exit_security(void); 1056 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1057 bool rxrpc_look_up_server_security(struct rxrpc_local *, struct rxrpc_sock *, 1058 const struct rxrpc_security **, struct key **, 1059 struct sk_buff *); 1060 1061 /* 1062 * sendmsg.c 1063 */ 1064 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1065 1066 /* 1067 * skbuff.c 1068 */ 1069 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1070 void rxrpc_packet_destructor(struct sk_buff *); 1071 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1072 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1073 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1074 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1075 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1076 void rxrpc_purge_queue(struct sk_buff_head *); 1077 1078 /* 1079 * sysctl.c 1080 */ 1081 #ifdef CONFIG_SYSCTL 1082 extern int __init rxrpc_sysctl_init(void); 1083 extern void rxrpc_sysctl_exit(void); 1084 #else 1085 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1086 static inline void rxrpc_sysctl_exit(void) {} 1087 #endif 1088 1089 /* 1090 * utils.c 1091 */ 1092 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1093 1094 static inline bool before(u32 seq1, u32 seq2) 1095 { 1096 return (s32)(seq1 - seq2) < 0; 1097 } 1098 static inline bool before_eq(u32 seq1, u32 seq2) 1099 { 1100 return (s32)(seq1 - seq2) <= 0; 1101 } 1102 static inline bool after(u32 seq1, u32 seq2) 1103 { 1104 return (s32)(seq1 - seq2) > 0; 1105 } 1106 static inline bool after_eq(u32 seq1, u32 seq2) 1107 { 1108 return (s32)(seq1 - seq2) >= 0; 1109 } 1110 1111 /* 1112 * debug tracing 1113 */ 1114 extern unsigned int rxrpc_debug; 1115 1116 #define dbgprintk(FMT,...) \ 1117 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1118 1119 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1120 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1121 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1122 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1123 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1124 1125 1126 #if defined(__KDEBUG) 1127 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1128 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1129 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1130 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1131 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1132 1133 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1134 #define RXRPC_DEBUG_KENTER 0x01 1135 #define RXRPC_DEBUG_KLEAVE 0x02 1136 #define RXRPC_DEBUG_KDEBUG 0x04 1137 #define RXRPC_DEBUG_KPROTO 0x08 1138 #define RXRPC_DEBUG_KNET 0x10 1139 1140 #define _enter(FMT,...) \ 1141 do { \ 1142 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1143 kenter(FMT,##__VA_ARGS__); \ 1144 } while (0) 1145 1146 #define _leave(FMT,...) \ 1147 do { \ 1148 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1149 kleave(FMT,##__VA_ARGS__); \ 1150 } while (0) 1151 1152 #define _debug(FMT,...) \ 1153 do { \ 1154 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1155 kdebug(FMT,##__VA_ARGS__); \ 1156 } while (0) 1157 1158 #define _proto(FMT,...) \ 1159 do { \ 1160 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1161 kproto(FMT,##__VA_ARGS__); \ 1162 } while (0) 1163 1164 #define _net(FMT,...) \ 1165 do { \ 1166 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1167 knet(FMT,##__VA_ARGS__); \ 1168 } while (0) 1169 1170 #else 1171 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1172 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1173 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1174 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1175 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1176 #endif 1177 1178 /* 1179 * debug assertion checking 1180 */ 1181 #if 1 // defined(__KDEBUGALL) 1182 1183 #define ASSERT(X) \ 1184 do { \ 1185 if (unlikely(!(X))) { \ 1186 pr_err("Assertion failed\n"); \ 1187 BUG(); \ 1188 } \ 1189 } while (0) 1190 1191 #define ASSERTCMP(X, OP, Y) \ 1192 do { \ 1193 __typeof__(X) _x = (X); \ 1194 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1195 if (unlikely(!(_x OP _y))) { \ 1196 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1197 (unsigned long)_x, (unsigned long)_x, #OP, \ 1198 (unsigned long)_y, (unsigned long)_y); \ 1199 BUG(); \ 1200 } \ 1201 } while (0) 1202 1203 #define ASSERTIF(C, X) \ 1204 do { \ 1205 if (unlikely((C) && !(X))) { \ 1206 pr_err("Assertion failed\n"); \ 1207 BUG(); \ 1208 } \ 1209 } while (0) 1210 1211 #define ASSERTIFCMP(C, X, OP, Y) \ 1212 do { \ 1213 __typeof__(X) _x = (X); \ 1214 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1215 if (unlikely((C) && !(_x OP _y))) { \ 1216 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1217 (unsigned long)_x, (unsigned long)_x, #OP, \ 1218 (unsigned long)_y, (unsigned long)_y); \ 1219 BUG(); \ 1220 } \ 1221 } while (0) 1222 1223 #else 1224 1225 #define ASSERT(X) \ 1226 do { \ 1227 } while (0) 1228 1229 #define ASSERTCMP(X, OP, Y) \ 1230 do { \ 1231 } while (0) 1232 1233 #define ASSERTIF(C, X) \ 1234 do { \ 1235 } while (0) 1236 1237 #define ASSERTIFCMP(C, X, OP, Y) \ 1238 do { \ 1239 } while (0) 1240 1241 #endif /* __KDEBUGALL */ 1242