1 /* AF_RXRPC internal definitions 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/atomic.h> 13 #include <linux/seqlock.h> 14 #include <net/net_namespace.h> 15 #include <net/netns/generic.h> 16 #include <net/sock.h> 17 #include <net/af_rxrpc.h> 18 #include "protocol.h" 19 20 #if 0 21 #define CHECK_SLAB_OKAY(X) \ 22 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 23 (POISON_FREE << 8 | POISON_FREE)) 24 #else 25 #define CHECK_SLAB_OKAY(X) do {} while (0) 26 #endif 27 28 #define FCRYPT_BSIZE 8 29 struct rxrpc_crypt { 30 union { 31 u8 x[FCRYPT_BSIZE]; 32 __be32 n[2]; 33 }; 34 } __attribute__((aligned(8))); 35 36 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 37 #define rxrpc_queue_delayed_work(WS,D) \ 38 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 39 40 struct rxrpc_connection; 41 42 /* 43 * Mark applied to socket buffers. 44 */ 45 enum rxrpc_skb_mark { 46 RXRPC_SKB_MARK_DATA, /* data message */ 47 RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ 48 RXRPC_SKB_MARK_BUSY, /* server busy message */ 49 RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ 50 RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ 51 RXRPC_SKB_MARK_NET_ERROR, /* network error message */ 52 RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ 53 RXRPC_SKB_MARK_NEW_CALL, /* local error message */ 54 }; 55 56 /* 57 * sk_state for RxRPC sockets 58 */ 59 enum { 60 RXRPC_UNBOUND = 0, 61 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 62 RXRPC_CLIENT_BOUND, /* client local address bound */ 63 RXRPC_SERVER_BOUND, /* server local address bound */ 64 RXRPC_SERVER_BOUND2, /* second server local address bound */ 65 RXRPC_SERVER_LISTENING, /* server listening for connections */ 66 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 67 RXRPC_CLOSE, /* socket is being closed */ 68 }; 69 70 /* 71 * Per-network namespace data. 72 */ 73 struct rxrpc_net { 74 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 75 u32 epoch; /* Local epoch for detecting local-end reset */ 76 struct list_head calls; /* List of calls active in this namespace */ 77 rwlock_t call_lock; /* Lock for ->calls */ 78 atomic_t nr_calls; /* Count of allocated calls */ 79 80 atomic_t nr_conns; 81 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 82 struct list_head service_conns; /* Service conns in this namespace */ 83 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 84 struct work_struct service_conn_reaper; 85 struct timer_list service_conn_reap_timer; 86 87 unsigned int nr_client_conns; 88 unsigned int nr_active_client_conns; 89 bool kill_all_client_conns; 90 bool live; 91 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 92 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 93 struct list_head waiting_client_conns; 94 struct list_head active_client_conns; 95 struct list_head idle_client_conns; 96 struct work_struct client_conn_reaper; 97 struct timer_list client_conn_reap_timer; 98 99 struct list_head local_endpoints; 100 struct mutex local_mutex; /* Lock for ->local_endpoints */ 101 102 DECLARE_HASHTABLE (peer_hash, 10); 103 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 104 105 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 106 u8 peer_keepalive_cursor; 107 ktime_t peer_keepalive_base; 108 struct hlist_head peer_keepalive[RXRPC_KEEPALIVE_TIME + 1]; 109 struct hlist_head peer_keepalive_new; 110 struct timer_list peer_keepalive_timer; 111 struct work_struct peer_keepalive_work; 112 }; 113 114 /* 115 * Service backlog preallocation. 116 * 117 * This contains circular buffers of preallocated peers, connections and calls 118 * for incoming service calls and their head and tail pointers. This allows 119 * calls to be set up in the data_ready handler, thereby avoiding the need to 120 * shuffle packets around so much. 121 */ 122 struct rxrpc_backlog { 123 unsigned short peer_backlog_head; 124 unsigned short peer_backlog_tail; 125 unsigned short conn_backlog_head; 126 unsigned short conn_backlog_tail; 127 unsigned short call_backlog_head; 128 unsigned short call_backlog_tail; 129 #define RXRPC_BACKLOG_MAX 32 130 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 131 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 132 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 133 }; 134 135 /* 136 * RxRPC socket definition 137 */ 138 struct rxrpc_sock { 139 /* WARNING: sk has to be the first member */ 140 struct sock sk; 141 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 142 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 143 struct rxrpc_local *local; /* local endpoint */ 144 struct rxrpc_backlog *backlog; /* Preallocation for services */ 145 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 146 struct list_head sock_calls; /* List of calls owned by this socket */ 147 struct list_head to_be_accepted; /* calls awaiting acceptance */ 148 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 149 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 150 struct key *key; /* security for this socket */ 151 struct key *securities; /* list of server security descriptors */ 152 struct rb_root calls; /* User ID -> call mapping */ 153 unsigned long flags; 154 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 155 rwlock_t call_lock; /* lock for calls */ 156 u32 min_sec_level; /* minimum security level */ 157 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 158 bool exclusive; /* Exclusive connection for a client socket */ 159 u16 second_service; /* Additional service bound to the endpoint */ 160 struct { 161 /* Service upgrade information */ 162 u16 from; /* Service ID to upgrade (if not 0) */ 163 u16 to; /* service ID to upgrade to */ 164 } service_upgrade; 165 sa_family_t family; /* Protocol family created with */ 166 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 167 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 168 }; 169 170 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 171 172 /* 173 * CPU-byteorder normalised Rx packet header. 174 */ 175 struct rxrpc_host_header { 176 u32 epoch; /* client boot timestamp */ 177 u32 cid; /* connection and channel ID */ 178 u32 callNumber; /* call ID (0 for connection-level packets) */ 179 u32 seq; /* sequence number of pkt in call stream */ 180 u32 serial; /* serial number of pkt sent to network */ 181 u8 type; /* packet type */ 182 u8 flags; /* packet flags */ 183 u8 userStatus; /* app-layer defined status */ 184 u8 securityIndex; /* security protocol ID */ 185 union { 186 u16 _rsvd; /* reserved */ 187 u16 cksum; /* kerberos security checksum */ 188 }; 189 u16 serviceId; /* service ID */ 190 } __packed; 191 192 /* 193 * RxRPC socket buffer private variables 194 * - max 48 bytes (struct sk_buff::cb) 195 */ 196 struct rxrpc_skb_priv { 197 union { 198 u8 nr_jumbo; /* Number of jumbo subpackets */ 199 }; 200 union { 201 int remain; /* amount of space remaining for next write */ 202 }; 203 204 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 205 }; 206 207 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 208 209 /* 210 * RxRPC security module interface 211 */ 212 struct rxrpc_security { 213 const char *name; /* name of this service */ 214 u8 security_index; /* security type provided */ 215 216 /* Initialise a security service */ 217 int (*init)(void); 218 219 /* Clean up a security service */ 220 void (*exit)(void); 221 222 /* initialise a connection's security */ 223 int (*init_connection_security)(struct rxrpc_connection *); 224 225 /* prime a connection's packet security */ 226 int (*prime_packet_security)(struct rxrpc_connection *); 227 228 /* impose security on a packet */ 229 int (*secure_packet)(struct rxrpc_call *, 230 struct sk_buff *, 231 size_t, 232 void *); 233 234 /* verify the security on a received packet */ 235 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 236 unsigned int, unsigned int, rxrpc_seq_t, u16); 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 usage; 267 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 268 struct list_head link; 269 struct socket *socket; /* my UDP socket */ 270 struct work_struct processor; 271 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 272 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 273 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 274 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 275 struct rb_root client_conns; /* Client connections by socket params */ 276 spinlock_t client_conns_lock; /* Lock for client_conns */ 277 spinlock_t lock; /* access lock */ 278 rwlock_t services_lock; /* lock for services list */ 279 int debug_id; /* debug ID for printks */ 280 bool dead; 281 bool service_closed; /* Service socket closed */ 282 struct sockaddr_rxrpc srx; /* local address */ 283 }; 284 285 /* 286 * RxRPC remote transport endpoint definition 287 * - matched by local endpoint, remote port, address and protocol type 288 */ 289 struct rxrpc_peer { 290 struct rcu_head rcu; /* This must be first */ 291 atomic_t usage; 292 unsigned long hash_key; 293 struct hlist_node hash_link; 294 struct rxrpc_local *local; 295 struct hlist_head error_targets; /* targets for net error distribution */ 296 struct work_struct error_distributor; 297 struct rb_root service_conns; /* Service connections */ 298 struct hlist_node 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 int error_report; /* Net (+0) or local (+1000000) to distribute */ 308 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 309 struct sockaddr_rxrpc srx; /* remote address */ 310 311 /* calculated RTT cache */ 312 #define RXRPC_RTT_CACHE_SIZE 32 313 ktime_t rtt_last_req; /* Time of last RTT request */ 314 u64 rtt; /* Current RTT estimate (in nS) */ 315 u64 rtt_sum; /* Sum of cache contents */ 316 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 317 u8 rtt_cursor; /* next entry at which to insert */ 318 u8 rtt_usage; /* amount of cache actually used */ 319 320 u8 cong_cwnd; /* Congestion window size */ 321 }; 322 323 /* 324 * Keys for matching a connection. 325 */ 326 struct rxrpc_conn_proto { 327 union { 328 struct { 329 u32 epoch; /* epoch of this connection */ 330 u32 cid; /* connection ID */ 331 }; 332 u64 index_key; 333 }; 334 }; 335 336 struct rxrpc_conn_parameters { 337 struct rxrpc_local *local; /* Representation of local endpoint */ 338 struct rxrpc_peer *peer; /* Remote endpoint */ 339 struct key *key; /* Security details */ 340 bool exclusive; /* T if conn is exclusive */ 341 bool upgrade; /* T if service ID can be upgraded */ 342 u16 service_id; /* Service ID for this connection */ 343 u32 security_level; /* Security level selected */ 344 }; 345 346 /* 347 * Bits in the connection flags. 348 */ 349 enum rxrpc_conn_flag { 350 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 351 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 352 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 353 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 354 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 355 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 356 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 357 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 358 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 359 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 360 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 361 }; 362 363 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 364 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 365 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 366 (1UL << RXRPC_CONN_FINAL_ACK_3)) 367 368 /* 369 * Events that can be raised upon a connection. 370 */ 371 enum rxrpc_conn_event { 372 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 373 }; 374 375 /* 376 * The connection cache state. 377 */ 378 enum rxrpc_conn_cache_state { 379 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 380 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 381 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 382 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 383 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 384 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 385 RXRPC_CONN__NR_CACHE_STATES 386 }; 387 388 /* 389 * The connection protocol state. 390 */ 391 enum rxrpc_conn_proto_state { 392 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 393 RXRPC_CONN_CLIENT, /* Client connection */ 394 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 395 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 396 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 397 RXRPC_CONN_SERVICE, /* Service secured connection */ 398 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 399 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 400 RXRPC_CONN__NR_STATES 401 }; 402 403 /* 404 * RxRPC connection definition 405 * - matched by { local, peer, epoch, conn_id, direction } 406 * - each connection can only handle four simultaneous calls 407 */ 408 struct rxrpc_connection { 409 struct rxrpc_conn_proto proto; 410 struct rxrpc_conn_parameters params; 411 412 atomic_t usage; 413 struct rcu_head rcu; 414 struct list_head cache_link; 415 416 spinlock_t channel_lock; 417 unsigned char active_chans; /* Mask of active channels */ 418 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 419 struct list_head waiting_calls; /* Calls waiting for 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 u32 call_id; /* ID of current call */ 424 u32 call_counter; /* Call ID counter */ 425 u32 last_call; /* ID of last call */ 426 u8 last_type; /* Type of last packet */ 427 union { 428 u32 last_seq; 429 u32 last_abort; 430 }; 431 } channels[RXRPC_MAXCALLS]; 432 433 struct timer_list timer; /* Conn event timer */ 434 struct work_struct processor; /* connection event processor */ 435 union { 436 struct rb_node client_node; /* Node in local->client_conns */ 437 struct rb_node service_node; /* Node in peer->service_conns */ 438 }; 439 struct list_head proc_link; /* link in procfs list */ 440 struct list_head link; /* link in master connection list */ 441 struct sk_buff_head rx_queue; /* received conn-level packets */ 442 const struct rxrpc_security *security; /* applied security module */ 443 struct key *server_key; /* security for this service */ 444 struct crypto_skcipher *cipher; /* encryption handle */ 445 struct rxrpc_crypt csum_iv; /* packet checksum base */ 446 unsigned long flags; 447 unsigned long events; 448 unsigned long idle_timestamp; /* Time at which last became idle */ 449 spinlock_t state_lock; /* state-change lock */ 450 enum rxrpc_conn_cache_state cache_state; 451 enum rxrpc_conn_proto_state state; /* current state of connection */ 452 u32 local_abort; /* local abort code */ 453 u32 remote_abort; /* remote abort code */ 454 int debug_id; /* debug ID for printks */ 455 atomic_t serial; /* packet serial number counter */ 456 unsigned int hi_serial; /* highest serial number received */ 457 u32 security_nonce; /* response re-use preventer */ 458 u16 service_id; /* Service ID, possibly upgraded */ 459 u8 size_align; /* data size alignment (for security) */ 460 u8 security_size; /* security header size */ 461 u8 security_ix; /* security type */ 462 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 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_TX_LASTQ, /* Last packet has been queued */ 476 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 477 RXRPC_CALL_PINGING, /* Ping in process */ 478 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 479 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 480 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 481 }; 482 483 /* 484 * Events that can be raised on a call. 485 */ 486 enum rxrpc_call_event { 487 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 488 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 489 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 490 RXRPC_CALL_EV_PING, /* Ping send required */ 491 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 492 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 493 }; 494 495 /* 496 * The states that a call can be in. 497 */ 498 enum rxrpc_call_state { 499 RXRPC_CALL_UNINITIALISED, 500 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 501 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 502 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 503 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 504 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 505 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 506 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 507 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 508 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 509 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 510 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 511 RXRPC_CALL_COMPLETE, /* - call complete */ 512 NR__RXRPC_CALL_STATES 513 }; 514 515 /* 516 * Call Tx congestion management modes. 517 */ 518 enum rxrpc_congest_mode { 519 RXRPC_CALL_SLOW_START, 520 RXRPC_CALL_CONGEST_AVOIDANCE, 521 RXRPC_CALL_PACKET_LOSS, 522 RXRPC_CALL_FAST_RETRANSMIT, 523 NR__RXRPC_CONGEST_MODES 524 }; 525 526 /* 527 * RxRPC call definition 528 * - matched by { connection, call_id } 529 */ 530 struct rxrpc_call { 531 struct rcu_head rcu; 532 struct rxrpc_connection *conn; /* connection carrying call */ 533 struct rxrpc_peer *peer; /* Peer record for remote address */ 534 struct rxrpc_sock __rcu *socket; /* socket responsible */ 535 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 536 struct mutex user_mutex; /* User access mutex */ 537 unsigned long ack_at; /* When deferred ACK needs to happen */ 538 unsigned long ack_lost_at; /* When ACK is figured as lost */ 539 unsigned long resend_at; /* When next resend needs to happen */ 540 unsigned long ping_at; /* When next to send a ping */ 541 unsigned long keepalive_at; /* When next to send a keepalive ping */ 542 unsigned long expect_rx_by; /* When we expect to get a packet by */ 543 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 544 unsigned long expect_term_by; /* When we expect call termination by */ 545 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 546 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 547 struct timer_list timer; /* Combined event timer */ 548 struct work_struct processor; /* Event processor */ 549 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 550 struct list_head link; /* link in master call list */ 551 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 552 struct hlist_node error_link; /* link in error distribution list */ 553 struct list_head accept_link; /* Link in rx->acceptq */ 554 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 555 struct list_head sock_link; /* Link in rx->sock_calls */ 556 struct rb_node sock_node; /* Node in rx->calls */ 557 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 558 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 559 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 560 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 561 unsigned long user_call_ID; /* user-defined call ID */ 562 unsigned long flags; 563 unsigned long events; 564 spinlock_t lock; 565 spinlock_t notify_lock; /* Kernel notification lock */ 566 rwlock_t state_lock; /* lock for state transition */ 567 u32 abort_code; /* Local/remote abort code */ 568 int error; /* Local error incurred */ 569 enum rxrpc_call_state state; /* current state of call */ 570 enum rxrpc_call_completion completion; /* Call completion condition */ 571 atomic_t usage; 572 u16 service_id; /* service ID */ 573 u8 security_ix; /* Security type */ 574 u32 call_id; /* call ID on connection */ 575 u32 cid; /* connection ID plus channel index */ 576 int debug_id; /* debug ID for printks */ 577 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 578 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 579 580 /* Rx/Tx circular buffer, depending on phase. 581 * 582 * In the Rx phase, packets are annotated with 0 or the number of the 583 * segment of a jumbo packet each buffer refers to. There can be up to 584 * 47 segments in a maximum-size UDP packet. 585 * 586 * In the Tx phase, packets are annotated with which buffers have been 587 * acked. 588 */ 589 #define RXRPC_RXTX_BUFF_SIZE 64 590 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 591 #define RXRPC_INIT_RX_WINDOW_SIZE 32 592 struct sk_buff **rxtx_buffer; 593 u8 *rxtx_annotations; 594 #define RXRPC_TX_ANNO_ACK 0 595 #define RXRPC_TX_ANNO_UNACK 1 596 #define RXRPC_TX_ANNO_NAK 2 597 #define RXRPC_TX_ANNO_RETRANS 3 598 #define RXRPC_TX_ANNO_MASK 0x03 599 #define RXRPC_TX_ANNO_LAST 0x04 600 #define RXRPC_TX_ANNO_RESENT 0x08 601 602 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 603 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 604 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 605 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 606 * not hard-ACK'd packet follows this. 607 */ 608 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 609 610 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 611 * is fixed, we keep these numbers in terms of segments (ie. DATA 612 * packets) rather than bytes. 613 */ 614 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 615 u8 cong_cwnd; /* Congestion window size */ 616 u8 cong_extra; /* Extra to send for congestion management */ 617 u8 cong_ssthresh; /* Slow-start threshold */ 618 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 619 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 620 u8 cong_cumul_acks; /* Cumulative ACK count */ 621 ktime_t cong_tstamp; /* Last time cwnd was changed */ 622 623 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 624 * consumed packet follows this. 625 */ 626 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 627 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 628 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 629 u8 rx_winsize; /* Size of Rx window */ 630 u8 tx_winsize; /* Maximum size of Tx window */ 631 bool tx_phase; /* T if transmission phase, F if receive phase */ 632 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 633 634 /* receive-phase ACK management */ 635 u8 ackr_reason; /* reason to ACK */ 636 u16 ackr_skew; /* skew on packet being ACK'd */ 637 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 638 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 639 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 640 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 641 642 /* ping management */ 643 rxrpc_serial_t ping_serial; /* Last ping sent */ 644 ktime_t ping_time; /* Time last ping sent */ 645 646 /* transmission-phase ACK management */ 647 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 648 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 649 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 650 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 651 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 652 }; 653 654 /* 655 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 656 */ 657 struct rxrpc_ack_summary { 658 u8 ack_reason; 659 u8 nr_acks; /* Number of ACKs in packet */ 660 u8 nr_nacks; /* Number of NACKs in packet */ 661 u8 nr_new_acks; /* Number of new ACKs in packet */ 662 u8 nr_new_nacks; /* Number of new NACKs in packet */ 663 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 664 bool new_low_nack; /* T if new low NACK found */ 665 bool retrans_timeo; /* T if reTx due to timeout happened */ 666 u8 flight_size; /* Number of unreceived transmissions */ 667 /* Place to stash values for tracing */ 668 enum rxrpc_congest_mode mode:8; 669 u8 cwnd; 670 u8 ssthresh; 671 u8 dup_acks; 672 u8 cumulative_acks; 673 }; 674 675 /* 676 * sendmsg() cmsg-specified parameters. 677 */ 678 enum rxrpc_command { 679 RXRPC_CMD_SEND_DATA, /* send data message */ 680 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 681 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 682 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 683 }; 684 685 struct rxrpc_call_params { 686 s64 tx_total_len; /* Total Tx data length (if send data) */ 687 unsigned long user_call_ID; /* User's call ID */ 688 struct { 689 u32 hard; /* Maximum lifetime (sec) */ 690 u32 idle; /* Max time since last data packet (msec) */ 691 u32 normal; /* Max time since last call packet (msec) */ 692 } timeouts; 693 u8 nr_timeouts; /* Number of timeouts specified */ 694 }; 695 696 struct rxrpc_send_params { 697 struct rxrpc_call_params call; 698 u32 abort_code; /* Abort code to Tx (if abort) */ 699 enum rxrpc_command command : 8; /* The command to implement */ 700 bool exclusive; /* Shared or exclusive call */ 701 bool upgrade; /* If the connection is upgradeable */ 702 }; 703 704 #include <trace/events/rxrpc.h> 705 706 /* 707 * af_rxrpc.c 708 */ 709 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 710 extern struct workqueue_struct *rxrpc_workqueue; 711 712 /* 713 * call_accept.c 714 */ 715 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 716 void rxrpc_discard_prealloc(struct rxrpc_sock *); 717 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 718 struct rxrpc_connection *, 719 struct sk_buff *); 720 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 721 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 722 rxrpc_notify_rx_t); 723 int rxrpc_reject_call(struct rxrpc_sock *); 724 725 /* 726 * call_event.c 727 */ 728 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 729 enum rxrpc_propose_ack_trace); 730 void rxrpc_process_call(struct work_struct *); 731 732 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 733 unsigned long expire_at, 734 unsigned long now, 735 enum rxrpc_timer_trace why) 736 { 737 trace_rxrpc_timer(call, why, now); 738 timer_reduce(&call->timer, expire_at); 739 } 740 741 /* 742 * call_object.c 743 */ 744 extern const char *const rxrpc_call_states[]; 745 extern const char *const rxrpc_call_completions[]; 746 extern unsigned int rxrpc_max_call_lifetime; 747 extern struct kmem_cache *rxrpc_call_jar; 748 749 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 750 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 751 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 752 struct rxrpc_conn_parameters *, 753 struct sockaddr_rxrpc *, 754 struct rxrpc_call_params *, gfp_t, 755 unsigned int); 756 int rxrpc_retry_client_call(struct rxrpc_sock *, 757 struct rxrpc_call *, 758 struct rxrpc_conn_parameters *, 759 struct sockaddr_rxrpc *, 760 gfp_t); 761 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 762 struct sk_buff *); 763 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 764 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 765 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 766 bool __rxrpc_queue_call(struct rxrpc_call *); 767 bool rxrpc_queue_call(struct rxrpc_call *); 768 void rxrpc_see_call(struct rxrpc_call *); 769 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 770 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 771 void rxrpc_cleanup_call(struct rxrpc_call *); 772 void rxrpc_destroy_all_calls(struct rxrpc_net *); 773 774 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 775 { 776 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 777 } 778 779 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 780 { 781 return !rxrpc_is_service_call(call); 782 } 783 784 /* 785 * Transition a call to the complete state. 786 */ 787 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 788 enum rxrpc_call_completion compl, 789 u32 abort_code, 790 int error) 791 { 792 if (call->state < RXRPC_CALL_COMPLETE) { 793 call->abort_code = abort_code; 794 call->error = error; 795 call->completion = compl, 796 call->state = RXRPC_CALL_COMPLETE; 797 trace_rxrpc_call_complete(call); 798 wake_up(&call->waitq); 799 return true; 800 } 801 return false; 802 } 803 804 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 805 enum rxrpc_call_completion compl, 806 u32 abort_code, 807 int error) 808 { 809 bool ret; 810 811 write_lock_bh(&call->state_lock); 812 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 813 write_unlock_bh(&call->state_lock); 814 return ret; 815 } 816 817 /* 818 * Record that a call successfully completed. 819 */ 820 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 821 { 822 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 823 } 824 825 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 826 { 827 bool ret; 828 829 write_lock_bh(&call->state_lock); 830 ret = __rxrpc_call_completed(call); 831 write_unlock_bh(&call->state_lock); 832 return ret; 833 } 834 835 /* 836 * Record that a call is locally aborted. 837 */ 838 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 839 rxrpc_seq_t seq, 840 u32 abort_code, int error) 841 { 842 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 843 abort_code, error); 844 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 845 abort_code, error); 846 } 847 848 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 849 rxrpc_seq_t seq, u32 abort_code, int error) 850 { 851 bool ret; 852 853 write_lock_bh(&call->state_lock); 854 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 855 write_unlock_bh(&call->state_lock); 856 return ret; 857 } 858 859 /* 860 * Abort a call due to a protocol error. 861 */ 862 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 863 struct sk_buff *skb, 864 const char *eproto_why, 865 const char *why, 866 u32 abort_code) 867 { 868 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 869 870 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 871 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 872 } 873 874 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 875 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 876 (abort_why), (abort_code)) 877 878 /* 879 * conn_client.c 880 */ 881 extern unsigned int rxrpc_max_client_connections; 882 extern unsigned int rxrpc_reap_client_connections; 883 extern unsigned long rxrpc_conn_idle_client_expiry; 884 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 885 extern struct idr rxrpc_client_conn_ids; 886 887 void rxrpc_destroy_client_conn_ids(void); 888 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 889 struct sockaddr_rxrpc *, gfp_t); 890 void rxrpc_expose_client_call(struct rxrpc_call *); 891 void rxrpc_disconnect_client_call(struct rxrpc_call *); 892 void rxrpc_put_client_conn(struct rxrpc_connection *); 893 void rxrpc_discard_expired_client_conns(struct work_struct *); 894 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 895 896 /* 897 * conn_event.c 898 */ 899 void rxrpc_process_connection(struct work_struct *); 900 901 /* 902 * conn_object.c 903 */ 904 extern unsigned int rxrpc_connection_expiry; 905 extern unsigned int rxrpc_closed_conn_expiry; 906 907 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 908 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 909 struct sk_buff *); 910 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 911 void rxrpc_disconnect_call(struct rxrpc_call *); 912 void rxrpc_kill_connection(struct rxrpc_connection *); 913 bool rxrpc_queue_conn(struct rxrpc_connection *); 914 void rxrpc_see_connection(struct rxrpc_connection *); 915 void rxrpc_get_connection(struct rxrpc_connection *); 916 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 917 void rxrpc_put_service_conn(struct rxrpc_connection *); 918 void rxrpc_service_connection_reaper(struct work_struct *); 919 void rxrpc_destroy_all_connections(struct rxrpc_net *); 920 921 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 922 { 923 return conn->out_clientflag; 924 } 925 926 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 927 { 928 return !rxrpc_conn_is_client(conn); 929 } 930 931 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 932 { 933 if (!conn) 934 return; 935 936 if (rxrpc_conn_is_client(conn)) 937 rxrpc_put_client_conn(conn); 938 else 939 rxrpc_put_service_conn(conn); 940 } 941 942 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 943 unsigned long expire_at) 944 { 945 timer_reduce(&conn->timer, expire_at); 946 } 947 948 /* 949 * conn_service.c 950 */ 951 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 952 struct sk_buff *); 953 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 954 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 955 struct rxrpc_connection *, struct sk_buff *); 956 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 957 958 /* 959 * input.c 960 */ 961 void rxrpc_data_ready(struct sock *); 962 963 /* 964 * insecure.c 965 */ 966 extern const struct rxrpc_security rxrpc_no_security; 967 968 /* 969 * key.c 970 */ 971 extern struct key_type key_type_rxrpc; 972 extern struct key_type key_type_rxrpc_s; 973 974 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 975 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 976 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 977 u32); 978 979 /* 980 * local_event.c 981 */ 982 extern void rxrpc_process_local_events(struct rxrpc_local *); 983 984 /* 985 * local_object.c 986 */ 987 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 988 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 989 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 990 void rxrpc_put_local(struct rxrpc_local *); 991 void rxrpc_queue_local(struct rxrpc_local *); 992 void rxrpc_destroy_all_locals(struct rxrpc_net *); 993 994 /* 995 * misc.c 996 */ 997 extern unsigned int rxrpc_max_backlog __read_mostly; 998 extern unsigned long rxrpc_requested_ack_delay; 999 extern unsigned long rxrpc_soft_ack_delay; 1000 extern unsigned long rxrpc_idle_ack_delay; 1001 extern unsigned int rxrpc_rx_window_size; 1002 extern unsigned int rxrpc_rx_mtu; 1003 extern unsigned int rxrpc_rx_jumbo_max; 1004 extern unsigned long rxrpc_resend_timeout; 1005 1006 extern const s8 rxrpc_ack_priority[]; 1007 1008 /* 1009 * net_ns.c 1010 */ 1011 extern unsigned int rxrpc_net_id; 1012 extern struct pernet_operations rxrpc_net_ops; 1013 1014 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1015 { 1016 return net_generic(net, rxrpc_net_id); 1017 } 1018 1019 /* 1020 * output.c 1021 */ 1022 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1023 int rxrpc_send_abort_packet(struct rxrpc_call *); 1024 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1025 void rxrpc_reject_packets(struct rxrpc_local *); 1026 void rxrpc_send_keepalive(struct rxrpc_peer *); 1027 1028 /* 1029 * peer_event.c 1030 */ 1031 void rxrpc_error_report(struct sock *); 1032 void rxrpc_peer_error_distributor(struct work_struct *); 1033 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1034 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1035 void rxrpc_peer_keepalive_worker(struct work_struct *); 1036 1037 /* 1038 * peer_object.c 1039 */ 1040 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1041 const struct sockaddr_rxrpc *); 1042 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1043 struct sockaddr_rxrpc *, gfp_t); 1044 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1045 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1046 struct rxrpc_peer *); 1047 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1048 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1049 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1050 void rxrpc_put_peer(struct rxrpc_peer *); 1051 void __rxrpc_queue_peer_error(struct rxrpc_peer *); 1052 1053 /* 1054 * proc.c 1055 */ 1056 extern const struct seq_operations rxrpc_call_seq_ops; 1057 extern const struct seq_operations rxrpc_connection_seq_ops; 1058 1059 /* 1060 * recvmsg.c 1061 */ 1062 void rxrpc_notify_socket(struct rxrpc_call *); 1063 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1064 1065 /* 1066 * rxkad.c 1067 */ 1068 #ifdef CONFIG_RXKAD 1069 extern const struct rxrpc_security rxkad; 1070 #endif 1071 1072 /* 1073 * security.c 1074 */ 1075 int __init rxrpc_init_security(void); 1076 void rxrpc_exit_security(void); 1077 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1078 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1079 1080 /* 1081 * sendmsg.c 1082 */ 1083 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1084 1085 /* 1086 * skbuff.c 1087 */ 1088 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1089 void rxrpc_packet_destructor(struct sk_buff *); 1090 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1091 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1092 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1093 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1094 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1095 void rxrpc_purge_queue(struct sk_buff_head *); 1096 1097 /* 1098 * sysctl.c 1099 */ 1100 #ifdef CONFIG_SYSCTL 1101 extern int __init rxrpc_sysctl_init(void); 1102 extern void rxrpc_sysctl_exit(void); 1103 #else 1104 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1105 static inline void rxrpc_sysctl_exit(void) {} 1106 #endif 1107 1108 /* 1109 * utils.c 1110 */ 1111 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1112 struct sk_buff *); 1113 1114 static inline bool before(u32 seq1, u32 seq2) 1115 { 1116 return (s32)(seq1 - seq2) < 0; 1117 } 1118 static inline bool before_eq(u32 seq1, u32 seq2) 1119 { 1120 return (s32)(seq1 - seq2) <= 0; 1121 } 1122 static inline bool after(u32 seq1, u32 seq2) 1123 { 1124 return (s32)(seq1 - seq2) > 0; 1125 } 1126 static inline bool after_eq(u32 seq1, u32 seq2) 1127 { 1128 return (s32)(seq1 - seq2) >= 0; 1129 } 1130 1131 /* 1132 * debug tracing 1133 */ 1134 extern unsigned int rxrpc_debug; 1135 1136 #define dbgprintk(FMT,...) \ 1137 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1138 1139 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1140 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1141 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1142 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1143 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1144 1145 1146 #if defined(__KDEBUG) 1147 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1148 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1149 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1150 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1151 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1152 1153 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1154 #define RXRPC_DEBUG_KENTER 0x01 1155 #define RXRPC_DEBUG_KLEAVE 0x02 1156 #define RXRPC_DEBUG_KDEBUG 0x04 1157 #define RXRPC_DEBUG_KPROTO 0x08 1158 #define RXRPC_DEBUG_KNET 0x10 1159 1160 #define _enter(FMT,...) \ 1161 do { \ 1162 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1163 kenter(FMT,##__VA_ARGS__); \ 1164 } while (0) 1165 1166 #define _leave(FMT,...) \ 1167 do { \ 1168 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1169 kleave(FMT,##__VA_ARGS__); \ 1170 } while (0) 1171 1172 #define _debug(FMT,...) \ 1173 do { \ 1174 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1175 kdebug(FMT,##__VA_ARGS__); \ 1176 } while (0) 1177 1178 #define _proto(FMT,...) \ 1179 do { \ 1180 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1181 kproto(FMT,##__VA_ARGS__); \ 1182 } while (0) 1183 1184 #define _net(FMT,...) \ 1185 do { \ 1186 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1187 knet(FMT,##__VA_ARGS__); \ 1188 } while (0) 1189 1190 #else 1191 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1192 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1193 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1194 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1195 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1196 #endif 1197 1198 /* 1199 * debug assertion checking 1200 */ 1201 #if 1 // defined(__KDEBUGALL) 1202 1203 #define ASSERT(X) \ 1204 do { \ 1205 if (unlikely(!(X))) { \ 1206 pr_err("Assertion failed\n"); \ 1207 BUG(); \ 1208 } \ 1209 } while (0) 1210 1211 #define ASSERTCMP(X, OP, Y) \ 1212 do { \ 1213 __typeof__(X) _x = (X); \ 1214 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1215 if (unlikely(!(_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 #define ASSERTIF(C, X) \ 1224 do { \ 1225 if (unlikely((C) && !(X))) { \ 1226 pr_err("Assertion failed\n"); \ 1227 BUG(); \ 1228 } \ 1229 } while (0) 1230 1231 #define ASSERTIFCMP(C, X, OP, Y) \ 1232 do { \ 1233 __typeof__(X) _x = (X); \ 1234 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1235 if (unlikely((C) && !(_x OP _y))) { \ 1236 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1237 (unsigned long)_x, (unsigned long)_x, #OP, \ 1238 (unsigned long)_y, (unsigned long)_y); \ 1239 BUG(); \ 1240 } \ 1241 } while (0) 1242 1243 #else 1244 1245 #define ASSERT(X) \ 1246 do { \ 1247 } while (0) 1248 1249 #define ASSERTCMP(X, OP, Y) \ 1250 do { \ 1251 } while (0) 1252 1253 #define ASSERTIF(C, X) \ 1254 do { \ 1255 } while (0) 1256 1257 #define ASSERTIFCMP(C, X, OP, Y) \ 1258 do { \ 1259 } while (0) 1260 1261 #endif /* __KDEBUGALL */ 1262