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 }; 480 481 /* 482 * Events that can be raised on a call. 483 */ 484 enum rxrpc_call_event { 485 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 486 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 487 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 488 RXRPC_CALL_EV_PING, /* Ping send required */ 489 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 490 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 491 }; 492 493 /* 494 * The states that a call can be in. 495 */ 496 enum rxrpc_call_state { 497 RXRPC_CALL_UNINITIALISED, 498 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 499 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 500 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 501 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 502 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 503 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 504 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 505 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 506 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 507 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 508 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 509 RXRPC_CALL_COMPLETE, /* - call complete */ 510 NR__RXRPC_CALL_STATES 511 }; 512 513 /* 514 * Call Tx congestion management modes. 515 */ 516 enum rxrpc_congest_mode { 517 RXRPC_CALL_SLOW_START, 518 RXRPC_CALL_CONGEST_AVOIDANCE, 519 RXRPC_CALL_PACKET_LOSS, 520 RXRPC_CALL_FAST_RETRANSMIT, 521 NR__RXRPC_CONGEST_MODES 522 }; 523 524 /* 525 * RxRPC call definition 526 * - matched by { connection, call_id } 527 */ 528 struct rxrpc_call { 529 struct rcu_head rcu; 530 struct rxrpc_connection *conn; /* connection carrying call */ 531 struct rxrpc_peer *peer; /* Peer record for remote address */ 532 struct rxrpc_sock __rcu *socket; /* socket responsible */ 533 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 534 struct mutex user_mutex; /* User access mutex */ 535 unsigned long ack_at; /* When deferred ACK needs to happen */ 536 unsigned long ack_lost_at; /* When ACK is figured as lost */ 537 unsigned long resend_at; /* When next resend needs to happen */ 538 unsigned long ping_at; /* When next to send a ping */ 539 unsigned long keepalive_at; /* When next to send a keepalive ping */ 540 unsigned long expect_rx_by; /* When we expect to get a packet by */ 541 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 542 unsigned long expect_term_by; /* When we expect call termination by */ 543 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 544 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 545 struct timer_list timer; /* Combined event timer */ 546 struct work_struct processor; /* Event processor */ 547 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 548 struct list_head link; /* link in master call list */ 549 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 550 struct hlist_node error_link; /* link in error distribution list */ 551 struct list_head accept_link; /* Link in rx->acceptq */ 552 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 553 struct list_head sock_link; /* Link in rx->sock_calls */ 554 struct rb_node sock_node; /* Node in rx->calls */ 555 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 556 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 557 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 558 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 559 unsigned long user_call_ID; /* user-defined call ID */ 560 unsigned long flags; 561 unsigned long events; 562 spinlock_t lock; 563 spinlock_t notify_lock; /* Kernel notification lock */ 564 rwlock_t state_lock; /* lock for state transition */ 565 u32 abort_code; /* Local/remote abort code */ 566 int error; /* Local error incurred */ 567 enum rxrpc_call_state state; /* current state of call */ 568 enum rxrpc_call_completion completion; /* Call completion condition */ 569 atomic_t usage; 570 u16 service_id; /* service ID */ 571 u8 security_ix; /* Security type */ 572 u32 call_id; /* call ID on connection */ 573 u32 cid; /* connection ID plus channel index */ 574 int debug_id; /* debug ID for printks */ 575 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 576 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 577 578 /* Rx/Tx circular buffer, depending on phase. 579 * 580 * In the Rx phase, packets are annotated with 0 or the number of the 581 * segment of a jumbo packet each buffer refers to. There can be up to 582 * 47 segments in a maximum-size UDP packet. 583 * 584 * In the Tx phase, packets are annotated with which buffers have been 585 * acked. 586 */ 587 #define RXRPC_RXTX_BUFF_SIZE 64 588 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 589 #define RXRPC_INIT_RX_WINDOW_SIZE 32 590 struct sk_buff **rxtx_buffer; 591 u8 *rxtx_annotations; 592 #define RXRPC_TX_ANNO_ACK 0 593 #define RXRPC_TX_ANNO_UNACK 1 594 #define RXRPC_TX_ANNO_NAK 2 595 #define RXRPC_TX_ANNO_RETRANS 3 596 #define RXRPC_TX_ANNO_MASK 0x03 597 #define RXRPC_TX_ANNO_LAST 0x04 598 #define RXRPC_TX_ANNO_RESENT 0x08 599 600 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 601 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 602 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 603 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 604 * not hard-ACK'd packet follows this. 605 */ 606 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 607 608 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 609 * is fixed, we keep these numbers in terms of segments (ie. DATA 610 * packets) rather than bytes. 611 */ 612 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 613 u8 cong_cwnd; /* Congestion window size */ 614 u8 cong_extra; /* Extra to send for congestion management */ 615 u8 cong_ssthresh; /* Slow-start threshold */ 616 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 617 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 618 u8 cong_cumul_acks; /* Cumulative ACK count */ 619 ktime_t cong_tstamp; /* Last time cwnd was changed */ 620 621 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 622 * consumed packet follows this. 623 */ 624 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 625 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 626 u8 rx_winsize; /* Size of Rx window */ 627 u8 tx_winsize; /* Maximum size of Tx window */ 628 bool tx_phase; /* T if transmission phase, F if receive phase */ 629 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 630 631 /* receive-phase ACK management */ 632 u8 ackr_reason; /* reason to ACK */ 633 u16 ackr_skew; /* skew on packet being ACK'd */ 634 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 635 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 636 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 637 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 638 639 /* ping management */ 640 rxrpc_serial_t ping_serial; /* Last ping sent */ 641 ktime_t ping_time; /* Time last ping sent */ 642 643 /* transmission-phase ACK management */ 644 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 645 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 646 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 647 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 648 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 649 }; 650 651 /* 652 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 653 */ 654 struct rxrpc_ack_summary { 655 u8 ack_reason; 656 u8 nr_acks; /* Number of ACKs in packet */ 657 u8 nr_nacks; /* Number of NACKs in packet */ 658 u8 nr_new_acks; /* Number of new ACKs in packet */ 659 u8 nr_new_nacks; /* Number of new NACKs in packet */ 660 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 661 bool new_low_nack; /* T if new low NACK found */ 662 bool retrans_timeo; /* T if reTx due to timeout happened */ 663 u8 flight_size; /* Number of unreceived transmissions */ 664 /* Place to stash values for tracing */ 665 enum rxrpc_congest_mode mode:8; 666 u8 cwnd; 667 u8 ssthresh; 668 u8 dup_acks; 669 u8 cumulative_acks; 670 }; 671 672 /* 673 * sendmsg() cmsg-specified parameters. 674 */ 675 enum rxrpc_command { 676 RXRPC_CMD_SEND_DATA, /* send data message */ 677 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 678 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 679 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 680 }; 681 682 struct rxrpc_call_params { 683 s64 tx_total_len; /* Total Tx data length (if send data) */ 684 unsigned long user_call_ID; /* User's call ID */ 685 struct { 686 u32 hard; /* Maximum lifetime (sec) */ 687 u32 idle; /* Max time since last data packet (msec) */ 688 u32 normal; /* Max time since last call packet (msec) */ 689 } timeouts; 690 u8 nr_timeouts; /* Number of timeouts specified */ 691 }; 692 693 struct rxrpc_send_params { 694 struct rxrpc_call_params call; 695 u32 abort_code; /* Abort code to Tx (if abort) */ 696 enum rxrpc_command command : 8; /* The command to implement */ 697 bool exclusive; /* Shared or exclusive call */ 698 bool upgrade; /* If the connection is upgradeable */ 699 }; 700 701 #include <trace/events/rxrpc.h> 702 703 /* 704 * af_rxrpc.c 705 */ 706 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 707 extern struct workqueue_struct *rxrpc_workqueue; 708 709 /* 710 * call_accept.c 711 */ 712 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 713 void rxrpc_discard_prealloc(struct rxrpc_sock *); 714 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 715 struct rxrpc_connection *, 716 struct sk_buff *); 717 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 718 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 719 rxrpc_notify_rx_t); 720 int rxrpc_reject_call(struct rxrpc_sock *); 721 722 /* 723 * call_event.c 724 */ 725 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 726 enum rxrpc_propose_ack_trace); 727 void rxrpc_process_call(struct work_struct *); 728 729 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 730 unsigned long expire_at, 731 unsigned long now, 732 enum rxrpc_timer_trace why) 733 { 734 trace_rxrpc_timer(call, why, now); 735 timer_reduce(&call->timer, expire_at); 736 } 737 738 /* 739 * call_object.c 740 */ 741 extern const char *const rxrpc_call_states[]; 742 extern const char *const rxrpc_call_completions[]; 743 extern unsigned int rxrpc_max_call_lifetime; 744 extern struct kmem_cache *rxrpc_call_jar; 745 746 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 747 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 748 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 749 struct rxrpc_conn_parameters *, 750 struct sockaddr_rxrpc *, 751 struct rxrpc_call_params *, gfp_t, 752 unsigned int); 753 int rxrpc_retry_client_call(struct rxrpc_sock *, 754 struct rxrpc_call *, 755 struct rxrpc_conn_parameters *, 756 struct sockaddr_rxrpc *, 757 gfp_t); 758 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 759 struct sk_buff *); 760 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 761 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 762 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 763 bool __rxrpc_queue_call(struct rxrpc_call *); 764 bool rxrpc_queue_call(struct rxrpc_call *); 765 void rxrpc_see_call(struct rxrpc_call *); 766 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 767 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 768 void rxrpc_cleanup_call(struct rxrpc_call *); 769 void rxrpc_destroy_all_calls(struct rxrpc_net *); 770 771 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 772 { 773 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 774 } 775 776 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 777 { 778 return !rxrpc_is_service_call(call); 779 } 780 781 /* 782 * Transition a call to the complete state. 783 */ 784 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 785 enum rxrpc_call_completion compl, 786 u32 abort_code, 787 int error) 788 { 789 if (call->state < RXRPC_CALL_COMPLETE) { 790 call->abort_code = abort_code; 791 call->error = error; 792 call->completion = compl, 793 call->state = RXRPC_CALL_COMPLETE; 794 trace_rxrpc_call_complete(call); 795 wake_up(&call->waitq); 796 return true; 797 } 798 return false; 799 } 800 801 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 802 enum rxrpc_call_completion compl, 803 u32 abort_code, 804 int error) 805 { 806 bool ret; 807 808 write_lock_bh(&call->state_lock); 809 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 810 write_unlock_bh(&call->state_lock); 811 return ret; 812 } 813 814 /* 815 * Record that a call successfully completed. 816 */ 817 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 818 { 819 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 820 } 821 822 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 823 { 824 bool ret; 825 826 write_lock_bh(&call->state_lock); 827 ret = __rxrpc_call_completed(call); 828 write_unlock_bh(&call->state_lock); 829 return ret; 830 } 831 832 /* 833 * Record that a call is locally aborted. 834 */ 835 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 836 rxrpc_seq_t seq, 837 u32 abort_code, int error) 838 { 839 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 840 abort_code, error); 841 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 842 abort_code, error); 843 } 844 845 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 846 rxrpc_seq_t seq, u32 abort_code, int error) 847 { 848 bool ret; 849 850 write_lock_bh(&call->state_lock); 851 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 852 write_unlock_bh(&call->state_lock); 853 return ret; 854 } 855 856 /* 857 * Abort a call due to a protocol error. 858 */ 859 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 860 struct sk_buff *skb, 861 const char *eproto_why, 862 const char *why, 863 u32 abort_code) 864 { 865 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 866 867 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 868 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 869 } 870 871 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 872 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 873 (abort_why), (abort_code)) 874 875 /* 876 * conn_client.c 877 */ 878 extern unsigned int rxrpc_max_client_connections; 879 extern unsigned int rxrpc_reap_client_connections; 880 extern unsigned long rxrpc_conn_idle_client_expiry; 881 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 882 extern struct idr rxrpc_client_conn_ids; 883 884 void rxrpc_destroy_client_conn_ids(void); 885 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 886 struct sockaddr_rxrpc *, gfp_t); 887 void rxrpc_expose_client_call(struct rxrpc_call *); 888 void rxrpc_disconnect_client_call(struct rxrpc_call *); 889 void rxrpc_put_client_conn(struct rxrpc_connection *); 890 void rxrpc_discard_expired_client_conns(struct work_struct *); 891 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 892 893 /* 894 * conn_event.c 895 */ 896 void rxrpc_process_connection(struct work_struct *); 897 898 /* 899 * conn_object.c 900 */ 901 extern unsigned int rxrpc_connection_expiry; 902 extern unsigned int rxrpc_closed_conn_expiry; 903 904 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 905 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 906 struct sk_buff *); 907 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 908 void rxrpc_disconnect_call(struct rxrpc_call *); 909 void rxrpc_kill_connection(struct rxrpc_connection *); 910 bool rxrpc_queue_conn(struct rxrpc_connection *); 911 void rxrpc_see_connection(struct rxrpc_connection *); 912 void rxrpc_get_connection(struct rxrpc_connection *); 913 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 914 void rxrpc_put_service_conn(struct rxrpc_connection *); 915 void rxrpc_service_connection_reaper(struct work_struct *); 916 void rxrpc_destroy_all_connections(struct rxrpc_net *); 917 918 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 919 { 920 return conn->out_clientflag; 921 } 922 923 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 924 { 925 return !rxrpc_conn_is_client(conn); 926 } 927 928 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 929 { 930 if (!conn) 931 return; 932 933 if (rxrpc_conn_is_client(conn)) 934 rxrpc_put_client_conn(conn); 935 else 936 rxrpc_put_service_conn(conn); 937 } 938 939 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 940 unsigned long expire_at) 941 { 942 timer_reduce(&conn->timer, expire_at); 943 } 944 945 /* 946 * conn_service.c 947 */ 948 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 949 struct sk_buff *); 950 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 951 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 952 struct rxrpc_connection *, struct sk_buff *); 953 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 954 955 /* 956 * input.c 957 */ 958 void rxrpc_data_ready(struct sock *); 959 960 /* 961 * insecure.c 962 */ 963 extern const struct rxrpc_security rxrpc_no_security; 964 965 /* 966 * key.c 967 */ 968 extern struct key_type key_type_rxrpc; 969 extern struct key_type key_type_rxrpc_s; 970 971 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 972 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 973 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 974 u32); 975 976 /* 977 * local_event.c 978 */ 979 extern void rxrpc_process_local_events(struct rxrpc_local *); 980 981 /* 982 * local_object.c 983 */ 984 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 985 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 986 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 987 void rxrpc_put_local(struct rxrpc_local *); 988 void rxrpc_queue_local(struct rxrpc_local *); 989 void rxrpc_destroy_all_locals(struct rxrpc_net *); 990 991 /* 992 * misc.c 993 */ 994 extern unsigned int rxrpc_max_backlog __read_mostly; 995 extern unsigned long rxrpc_requested_ack_delay; 996 extern unsigned long rxrpc_soft_ack_delay; 997 extern unsigned long rxrpc_idle_ack_delay; 998 extern unsigned int rxrpc_rx_window_size; 999 extern unsigned int rxrpc_rx_mtu; 1000 extern unsigned int rxrpc_rx_jumbo_max; 1001 extern unsigned long rxrpc_resend_timeout; 1002 1003 extern const s8 rxrpc_ack_priority[]; 1004 1005 /* 1006 * net_ns.c 1007 */ 1008 extern unsigned int rxrpc_net_id; 1009 extern struct pernet_operations rxrpc_net_ops; 1010 1011 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1012 { 1013 return net_generic(net, rxrpc_net_id); 1014 } 1015 1016 /* 1017 * output.c 1018 */ 1019 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1020 int rxrpc_send_abort_packet(struct rxrpc_call *); 1021 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1022 void rxrpc_reject_packets(struct rxrpc_local *); 1023 void rxrpc_send_keepalive(struct rxrpc_peer *); 1024 1025 /* 1026 * peer_event.c 1027 */ 1028 void rxrpc_error_report(struct sock *); 1029 void rxrpc_peer_error_distributor(struct work_struct *); 1030 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1031 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1032 void rxrpc_peer_keepalive_worker(struct work_struct *); 1033 1034 /* 1035 * peer_object.c 1036 */ 1037 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1038 const struct sockaddr_rxrpc *); 1039 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1040 struct sockaddr_rxrpc *, gfp_t); 1041 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1042 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1043 struct rxrpc_peer *); 1044 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1045 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1046 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1047 void rxrpc_put_peer(struct rxrpc_peer *); 1048 void __rxrpc_queue_peer_error(struct rxrpc_peer *); 1049 1050 /* 1051 * proc.c 1052 */ 1053 extern const struct file_operations rxrpc_call_seq_fops; 1054 extern const struct file_operations rxrpc_connection_seq_fops; 1055 1056 /* 1057 * recvmsg.c 1058 */ 1059 void rxrpc_notify_socket(struct rxrpc_call *); 1060 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1061 1062 /* 1063 * rxkad.c 1064 */ 1065 #ifdef CONFIG_RXKAD 1066 extern const struct rxrpc_security rxkad; 1067 #endif 1068 1069 /* 1070 * security.c 1071 */ 1072 int __init rxrpc_init_security(void); 1073 void rxrpc_exit_security(void); 1074 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1075 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1076 1077 /* 1078 * sendmsg.c 1079 */ 1080 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1081 1082 /* 1083 * skbuff.c 1084 */ 1085 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1086 void rxrpc_packet_destructor(struct sk_buff *); 1087 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1088 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1089 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1090 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1091 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1092 void rxrpc_purge_queue(struct sk_buff_head *); 1093 1094 /* 1095 * sysctl.c 1096 */ 1097 #ifdef CONFIG_SYSCTL 1098 extern int __init rxrpc_sysctl_init(void); 1099 extern void rxrpc_sysctl_exit(void); 1100 #else 1101 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1102 static inline void rxrpc_sysctl_exit(void) {} 1103 #endif 1104 1105 /* 1106 * utils.c 1107 */ 1108 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1109 struct sk_buff *); 1110 1111 static inline bool before(u32 seq1, u32 seq2) 1112 { 1113 return (s32)(seq1 - seq2) < 0; 1114 } 1115 static inline bool before_eq(u32 seq1, u32 seq2) 1116 { 1117 return (s32)(seq1 - seq2) <= 0; 1118 } 1119 static inline bool after(u32 seq1, u32 seq2) 1120 { 1121 return (s32)(seq1 - seq2) > 0; 1122 } 1123 static inline bool after_eq(u32 seq1, u32 seq2) 1124 { 1125 return (s32)(seq1 - seq2) >= 0; 1126 } 1127 1128 /* 1129 * debug tracing 1130 */ 1131 extern unsigned int rxrpc_debug; 1132 1133 #define dbgprintk(FMT,...) \ 1134 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1135 1136 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1137 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1138 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1139 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1140 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1141 1142 1143 #if defined(__KDEBUG) 1144 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1145 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1146 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1147 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1148 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1149 1150 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1151 #define RXRPC_DEBUG_KENTER 0x01 1152 #define RXRPC_DEBUG_KLEAVE 0x02 1153 #define RXRPC_DEBUG_KDEBUG 0x04 1154 #define RXRPC_DEBUG_KPROTO 0x08 1155 #define RXRPC_DEBUG_KNET 0x10 1156 1157 #define _enter(FMT,...) \ 1158 do { \ 1159 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1160 kenter(FMT,##__VA_ARGS__); \ 1161 } while (0) 1162 1163 #define _leave(FMT,...) \ 1164 do { \ 1165 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1166 kleave(FMT,##__VA_ARGS__); \ 1167 } while (0) 1168 1169 #define _debug(FMT,...) \ 1170 do { \ 1171 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1172 kdebug(FMT,##__VA_ARGS__); \ 1173 } while (0) 1174 1175 #define _proto(FMT,...) \ 1176 do { \ 1177 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1178 kproto(FMT,##__VA_ARGS__); \ 1179 } while (0) 1180 1181 #define _net(FMT,...) \ 1182 do { \ 1183 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1184 knet(FMT,##__VA_ARGS__); \ 1185 } while (0) 1186 1187 #else 1188 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1189 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1190 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1191 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1192 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1193 #endif 1194 1195 /* 1196 * debug assertion checking 1197 */ 1198 #if 1 // defined(__KDEBUGALL) 1199 1200 #define ASSERT(X) \ 1201 do { \ 1202 if (unlikely(!(X))) { \ 1203 pr_err("Assertion failed\n"); \ 1204 BUG(); \ 1205 } \ 1206 } while (0) 1207 1208 #define ASSERTCMP(X, OP, Y) \ 1209 do { \ 1210 __typeof__(X) _x = (X); \ 1211 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1212 if (unlikely(!(_x OP _y))) { \ 1213 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1214 (unsigned long)_x, (unsigned long)_x, #OP, \ 1215 (unsigned long)_y, (unsigned long)_y); \ 1216 BUG(); \ 1217 } \ 1218 } while (0) 1219 1220 #define ASSERTIF(C, X) \ 1221 do { \ 1222 if (unlikely((C) && !(X))) { \ 1223 pr_err("Assertion failed\n"); \ 1224 BUG(); \ 1225 } \ 1226 } while (0) 1227 1228 #define ASSERTIFCMP(C, X, OP, Y) \ 1229 do { \ 1230 __typeof__(X) _x = (X); \ 1231 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1232 if (unlikely((C) && !(_x OP _y))) { \ 1233 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1234 (unsigned long)_x, (unsigned long)_x, #OP, \ 1235 (unsigned long)_y, (unsigned long)_y); \ 1236 BUG(); \ 1237 } \ 1238 } while (0) 1239 1240 #else 1241 1242 #define ASSERT(X) \ 1243 do { \ 1244 } while (0) 1245 1246 #define ASSERTCMP(X, OP, Y) \ 1247 do { \ 1248 } while (0) 1249 1250 #define ASSERTIF(C, X) \ 1251 do { \ 1252 } while (0) 1253 1254 #define ASSERTIFCMP(C, X, OP, Y) \ 1255 do { \ 1256 } while (0) 1257 1258 #endif /* __KDEBUGALL */ 1259