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 79 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 80 struct list_head service_conns; /* Service conns in this namespace */ 81 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 82 struct delayed_work service_conn_reaper; 83 84 unsigned int nr_client_conns; 85 unsigned int nr_active_client_conns; 86 bool kill_all_client_conns; 87 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 88 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 89 struct list_head waiting_client_conns; 90 struct list_head active_client_conns; 91 struct list_head idle_client_conns; 92 struct delayed_work client_conn_reaper; 93 94 struct list_head local_endpoints; 95 struct mutex local_mutex; /* Lock for ->local_endpoints */ 96 97 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 98 DECLARE_HASHTABLE (peer_hash, 10); 99 }; 100 101 /* 102 * Service backlog preallocation. 103 * 104 * This contains circular buffers of preallocated peers, connections and calls 105 * for incoming service calls and their head and tail pointers. This allows 106 * calls to be set up in the data_ready handler, thereby avoiding the need to 107 * shuffle packets around so much. 108 */ 109 struct rxrpc_backlog { 110 unsigned short peer_backlog_head; 111 unsigned short peer_backlog_tail; 112 unsigned short conn_backlog_head; 113 unsigned short conn_backlog_tail; 114 unsigned short call_backlog_head; 115 unsigned short call_backlog_tail; 116 #define RXRPC_BACKLOG_MAX 32 117 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 118 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 119 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 120 }; 121 122 /* 123 * RxRPC socket definition 124 */ 125 struct rxrpc_sock { 126 /* WARNING: sk has to be the first member */ 127 struct sock sk; 128 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 129 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 130 struct rxrpc_local *local; /* local endpoint */ 131 struct rxrpc_backlog *backlog; /* Preallocation for services */ 132 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 133 struct list_head sock_calls; /* List of calls owned by this socket */ 134 struct list_head to_be_accepted; /* calls awaiting acceptance */ 135 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 136 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 137 struct key *key; /* security for this socket */ 138 struct key *securities; /* list of server security descriptors */ 139 struct rb_root calls; /* User ID -> call mapping */ 140 unsigned long flags; 141 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 142 rwlock_t call_lock; /* lock for calls */ 143 u32 min_sec_level; /* minimum security level */ 144 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 145 bool exclusive; /* Exclusive connection for a client socket */ 146 u16 second_service; /* Additional service bound to the endpoint */ 147 struct { 148 /* Service upgrade information */ 149 u16 from; /* Service ID to upgrade (if not 0) */ 150 u16 to; /* service ID to upgrade to */ 151 } service_upgrade; 152 sa_family_t family; /* Protocol family created with */ 153 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 154 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 155 }; 156 157 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 158 159 /* 160 * CPU-byteorder normalised Rx packet header. 161 */ 162 struct rxrpc_host_header { 163 u32 epoch; /* client boot timestamp */ 164 u32 cid; /* connection and channel ID */ 165 u32 callNumber; /* call ID (0 for connection-level packets) */ 166 u32 seq; /* sequence number of pkt in call stream */ 167 u32 serial; /* serial number of pkt sent to network */ 168 u8 type; /* packet type */ 169 u8 flags; /* packet flags */ 170 u8 userStatus; /* app-layer defined status */ 171 u8 securityIndex; /* security protocol ID */ 172 union { 173 u16 _rsvd; /* reserved */ 174 u16 cksum; /* kerberos security checksum */ 175 }; 176 u16 serviceId; /* service ID */ 177 } __packed; 178 179 /* 180 * RxRPC socket buffer private variables 181 * - max 48 bytes (struct sk_buff::cb) 182 */ 183 struct rxrpc_skb_priv { 184 union { 185 u8 nr_jumbo; /* Number of jumbo subpackets */ 186 }; 187 union { 188 int remain; /* amount of space remaining for next write */ 189 }; 190 191 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 192 }; 193 194 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 195 196 /* 197 * RxRPC security module interface 198 */ 199 struct rxrpc_security { 200 const char *name; /* name of this service */ 201 u8 security_index; /* security type provided */ 202 203 /* Initialise a security service */ 204 int (*init)(void); 205 206 /* Clean up a security service */ 207 void (*exit)(void); 208 209 /* initialise a connection's security */ 210 int (*init_connection_security)(struct rxrpc_connection *); 211 212 /* prime a connection's packet security */ 213 int (*prime_packet_security)(struct rxrpc_connection *); 214 215 /* impose security on a packet */ 216 int (*secure_packet)(struct rxrpc_call *, 217 struct sk_buff *, 218 size_t, 219 void *); 220 221 /* verify the security on a received packet */ 222 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 223 unsigned int, unsigned int, rxrpc_seq_t, u16); 224 225 /* Locate the data in a received packet that has been verified. */ 226 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 227 unsigned int *, unsigned int *); 228 229 /* issue a challenge */ 230 int (*issue_challenge)(struct rxrpc_connection *); 231 232 /* respond to a challenge */ 233 int (*respond_to_challenge)(struct rxrpc_connection *, 234 struct sk_buff *, 235 u32 *); 236 237 /* verify a response */ 238 int (*verify_response)(struct rxrpc_connection *, 239 struct sk_buff *, 240 u32 *); 241 242 /* clear connection security */ 243 void (*clear)(struct rxrpc_connection *); 244 }; 245 246 /* 247 * RxRPC local transport endpoint description 248 * - owned by a single AF_RXRPC socket 249 * - pointed to by transport socket struct sk_user_data 250 */ 251 struct rxrpc_local { 252 struct rcu_head rcu; 253 atomic_t usage; 254 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 255 struct list_head link; 256 struct socket *socket; /* my UDP socket */ 257 struct work_struct processor; 258 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 259 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 260 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 261 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 262 struct rb_root client_conns; /* Client connections by socket params */ 263 spinlock_t client_conns_lock; /* Lock for client_conns */ 264 spinlock_t lock; /* access lock */ 265 rwlock_t services_lock; /* lock for services list */ 266 int debug_id; /* debug ID for printks */ 267 bool dead; 268 struct sockaddr_rxrpc srx; /* local address */ 269 }; 270 271 /* 272 * RxRPC remote transport endpoint definition 273 * - matched by local endpoint, remote port, address and protocol type 274 */ 275 struct rxrpc_peer { 276 struct rcu_head rcu; /* This must be first */ 277 atomic_t usage; 278 unsigned long hash_key; 279 struct hlist_node hash_link; 280 struct rxrpc_local *local; 281 struct hlist_head error_targets; /* targets for net error distribution */ 282 struct work_struct error_distributor; 283 struct rb_root service_conns; /* Service connections */ 284 seqlock_t service_conn_lock; 285 spinlock_t lock; /* access lock */ 286 unsigned int if_mtu; /* interface MTU for this peer */ 287 unsigned int mtu; /* network MTU for this peer */ 288 unsigned int maxdata; /* data size (MTU - hdrsize) */ 289 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 290 int debug_id; /* debug ID for printks */ 291 int error_report; /* Net (+0) or local (+1000000) to distribute */ 292 #define RXRPC_LOCAL_ERROR_OFFSET 1000000 293 struct sockaddr_rxrpc srx; /* remote address */ 294 295 /* calculated RTT cache */ 296 #define RXRPC_RTT_CACHE_SIZE 32 297 ktime_t rtt_last_req; /* Time of last RTT request */ 298 u64 rtt; /* Current RTT estimate (in nS) */ 299 u64 rtt_sum; /* Sum of cache contents */ 300 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 301 u8 rtt_cursor; /* next entry at which to insert */ 302 u8 rtt_usage; /* amount of cache actually used */ 303 304 u8 cong_cwnd; /* Congestion window size */ 305 }; 306 307 /* 308 * Keys for matching a connection. 309 */ 310 struct rxrpc_conn_proto { 311 union { 312 struct { 313 u32 epoch; /* epoch of this connection */ 314 u32 cid; /* connection ID */ 315 }; 316 u64 index_key; 317 }; 318 }; 319 320 struct rxrpc_conn_parameters { 321 struct rxrpc_local *local; /* Representation of local endpoint */ 322 struct rxrpc_peer *peer; /* Remote endpoint */ 323 struct key *key; /* Security details */ 324 bool exclusive; /* T if conn is exclusive */ 325 bool upgrade; /* T if service ID can be upgraded */ 326 u16 service_id; /* Service ID for this connection */ 327 u32 security_level; /* Security level selected */ 328 }; 329 330 /* 331 * Bits in the connection flags. 332 */ 333 enum rxrpc_conn_flag { 334 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 335 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 336 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 337 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 338 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 339 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 340 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 341 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 342 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 343 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 344 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 345 }; 346 347 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 348 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 349 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 350 (1UL << RXRPC_CONN_FINAL_ACK_3)) 351 352 /* 353 * Events that can be raised upon a connection. 354 */ 355 enum rxrpc_conn_event { 356 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 357 }; 358 359 /* 360 * The connection cache state. 361 */ 362 enum rxrpc_conn_cache_state { 363 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 364 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 365 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 366 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 367 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 368 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 369 RXRPC_CONN__NR_CACHE_STATES 370 }; 371 372 /* 373 * The connection protocol state. 374 */ 375 enum rxrpc_conn_proto_state { 376 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 377 RXRPC_CONN_CLIENT, /* Client connection */ 378 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 379 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 380 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 381 RXRPC_CONN_SERVICE, /* Service secured connection */ 382 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 383 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 384 RXRPC_CONN__NR_STATES 385 }; 386 387 /* 388 * RxRPC connection definition 389 * - matched by { local, peer, epoch, conn_id, direction } 390 * - each connection can only handle four simultaneous calls 391 */ 392 struct rxrpc_connection { 393 struct rxrpc_conn_proto proto; 394 struct rxrpc_conn_parameters params; 395 396 atomic_t usage; 397 struct rcu_head rcu; 398 struct list_head cache_link; 399 400 spinlock_t channel_lock; 401 unsigned char active_chans; /* Mask of active channels */ 402 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 403 struct list_head waiting_calls; /* Calls waiting for channels */ 404 struct rxrpc_channel { 405 unsigned long final_ack_at; /* Time at which to issue final ACK */ 406 struct rxrpc_call __rcu *call; /* Active call */ 407 u32 call_id; /* ID of current call */ 408 u32 call_counter; /* Call ID counter */ 409 u32 last_call; /* ID of last call */ 410 u8 last_type; /* Type of last packet */ 411 union { 412 u32 last_seq; 413 u32 last_abort; 414 }; 415 } channels[RXRPC_MAXCALLS]; 416 417 struct timer_list timer; /* Conn event timer */ 418 struct work_struct processor; /* connection event processor */ 419 union { 420 struct rb_node client_node; /* Node in local->client_conns */ 421 struct rb_node service_node; /* Node in peer->service_conns */ 422 }; 423 struct list_head proc_link; /* link in procfs list */ 424 struct list_head link; /* link in master connection list */ 425 struct sk_buff_head rx_queue; /* received conn-level packets */ 426 const struct rxrpc_security *security; /* applied security module */ 427 struct key *server_key; /* security for this service */ 428 struct crypto_skcipher *cipher; /* encryption handle */ 429 struct rxrpc_crypt csum_iv; /* packet checksum base */ 430 unsigned long flags; 431 unsigned long events; 432 unsigned long idle_timestamp; /* Time at which last became idle */ 433 spinlock_t state_lock; /* state-change lock */ 434 enum rxrpc_conn_cache_state cache_state; 435 enum rxrpc_conn_proto_state state; /* current state of connection */ 436 u32 local_abort; /* local abort code */ 437 u32 remote_abort; /* remote abort code */ 438 int debug_id; /* debug ID for printks */ 439 atomic_t serial; /* packet serial number counter */ 440 unsigned int hi_serial; /* highest serial number received */ 441 u32 security_nonce; /* response re-use preventer */ 442 u16 service_id; /* Service ID, possibly upgraded */ 443 u8 size_align; /* data size alignment (for security) */ 444 u8 security_size; /* security header size */ 445 u8 security_ix; /* security type */ 446 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 447 }; 448 449 /* 450 * Flags in call->flags. 451 */ 452 enum rxrpc_call_flag { 453 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 454 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 455 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 456 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 457 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 458 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 459 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 460 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 461 RXRPC_CALL_PINGING, /* Ping in process */ 462 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 463 }; 464 465 /* 466 * Events that can be raised on a call. 467 */ 468 enum rxrpc_call_event { 469 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 470 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 471 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 472 RXRPC_CALL_EV_PING, /* Ping send required */ 473 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 474 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 475 }; 476 477 /* 478 * The states that a call can be in. 479 */ 480 enum rxrpc_call_state { 481 RXRPC_CALL_UNINITIALISED, 482 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 483 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 484 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 485 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 486 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 487 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 488 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 489 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 490 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 491 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 492 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 493 RXRPC_CALL_COMPLETE, /* - call complete */ 494 NR__RXRPC_CALL_STATES 495 }; 496 497 /* 498 * Call Tx congestion management modes. 499 */ 500 enum rxrpc_congest_mode { 501 RXRPC_CALL_SLOW_START, 502 RXRPC_CALL_CONGEST_AVOIDANCE, 503 RXRPC_CALL_PACKET_LOSS, 504 RXRPC_CALL_FAST_RETRANSMIT, 505 NR__RXRPC_CONGEST_MODES 506 }; 507 508 /* 509 * RxRPC call definition 510 * - matched by { connection, call_id } 511 */ 512 struct rxrpc_call { 513 struct rcu_head rcu; 514 struct rxrpc_connection *conn; /* connection carrying call */ 515 struct rxrpc_peer *peer; /* Peer record for remote address */ 516 struct rxrpc_sock __rcu *socket; /* socket responsible */ 517 struct mutex user_mutex; /* User access mutex */ 518 unsigned long ack_at; /* When deferred ACK needs to happen */ 519 unsigned long ack_lost_at; /* When ACK is figured as lost */ 520 unsigned long resend_at; /* When next resend needs to happen */ 521 unsigned long ping_at; /* When next to send a ping */ 522 unsigned long expect_rx_by; /* When we expect to get a packet by */ 523 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 524 unsigned long expect_term_by; /* When we expect call termination by */ 525 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 526 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 527 struct timer_list timer; /* Combined event timer */ 528 struct work_struct processor; /* Event processor */ 529 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 530 struct list_head link; /* link in master call list */ 531 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 532 struct hlist_node error_link; /* link in error distribution list */ 533 struct list_head accept_link; /* Link in rx->acceptq */ 534 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 535 struct list_head sock_link; /* Link in rx->sock_calls */ 536 struct rb_node sock_node; /* Node in rx->calls */ 537 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 538 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 539 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 540 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 541 unsigned long user_call_ID; /* user-defined call ID */ 542 unsigned long flags; 543 unsigned long events; 544 spinlock_t lock; 545 spinlock_t notify_lock; /* Kernel notification lock */ 546 rwlock_t state_lock; /* lock for state transition */ 547 u32 abort_code; /* Local/remote abort code */ 548 int error; /* Local error incurred */ 549 enum rxrpc_call_state state; /* current state of call */ 550 enum rxrpc_call_completion completion; /* Call completion condition */ 551 atomic_t usage; 552 u16 service_id; /* service ID */ 553 u8 security_ix; /* Security type */ 554 u32 call_id; /* call ID on connection */ 555 u32 cid; /* connection ID plus channel index */ 556 int debug_id; /* debug ID for printks */ 557 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 558 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 559 560 /* Rx/Tx circular buffer, depending on phase. 561 * 562 * In the Rx phase, packets are annotated with 0 or the number of the 563 * segment of a jumbo packet each buffer refers to. There can be up to 564 * 47 segments in a maximum-size UDP packet. 565 * 566 * In the Tx phase, packets are annotated with which buffers have been 567 * acked. 568 */ 569 #define RXRPC_RXTX_BUFF_SIZE 64 570 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 571 #define RXRPC_INIT_RX_WINDOW_SIZE 32 572 struct sk_buff **rxtx_buffer; 573 u8 *rxtx_annotations; 574 #define RXRPC_TX_ANNO_ACK 0 575 #define RXRPC_TX_ANNO_UNACK 1 576 #define RXRPC_TX_ANNO_NAK 2 577 #define RXRPC_TX_ANNO_RETRANS 3 578 #define RXRPC_TX_ANNO_MASK 0x03 579 #define RXRPC_TX_ANNO_LAST 0x04 580 #define RXRPC_TX_ANNO_RESENT 0x08 581 582 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 583 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 584 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 585 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 586 * not hard-ACK'd packet follows this. 587 */ 588 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 589 590 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 591 * is fixed, we keep these numbers in terms of segments (ie. DATA 592 * packets) rather than bytes. 593 */ 594 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 595 u8 cong_cwnd; /* Congestion window size */ 596 u8 cong_extra; /* Extra to send for congestion management */ 597 u8 cong_ssthresh; /* Slow-start threshold */ 598 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 599 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 600 u8 cong_cumul_acks; /* Cumulative ACK count */ 601 ktime_t cong_tstamp; /* Last time cwnd was changed */ 602 603 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 604 * consumed packet follows this. 605 */ 606 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 607 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 608 u8 rx_winsize; /* Size of Rx window */ 609 u8 tx_winsize; /* Maximum size of Tx window */ 610 bool tx_phase; /* T if transmission phase, F if receive phase */ 611 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 612 613 /* receive-phase ACK management */ 614 u8 ackr_reason; /* reason to ACK */ 615 u16 ackr_skew; /* skew on packet being ACK'd */ 616 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 617 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 618 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 619 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 620 621 /* ping management */ 622 rxrpc_serial_t ping_serial; /* Last ping sent */ 623 ktime_t ping_time; /* Time last ping sent */ 624 625 /* transmission-phase ACK management */ 626 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 627 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 628 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 629 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 630 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 631 }; 632 633 /* 634 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 635 */ 636 struct rxrpc_ack_summary { 637 u8 ack_reason; 638 u8 nr_acks; /* Number of ACKs in packet */ 639 u8 nr_nacks; /* Number of NACKs in packet */ 640 u8 nr_new_acks; /* Number of new ACKs in packet */ 641 u8 nr_new_nacks; /* Number of new NACKs in packet */ 642 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 643 bool new_low_nack; /* T if new low NACK found */ 644 bool retrans_timeo; /* T if reTx due to timeout happened */ 645 u8 flight_size; /* Number of unreceived transmissions */ 646 /* Place to stash values for tracing */ 647 enum rxrpc_congest_mode mode:8; 648 u8 cwnd; 649 u8 ssthresh; 650 u8 dup_acks; 651 u8 cumulative_acks; 652 }; 653 654 /* 655 * sendmsg() cmsg-specified parameters. 656 */ 657 enum rxrpc_command { 658 RXRPC_CMD_SEND_DATA, /* send data message */ 659 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 660 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 661 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 662 }; 663 664 struct rxrpc_call_params { 665 s64 tx_total_len; /* Total Tx data length (if send data) */ 666 unsigned long user_call_ID; /* User's call ID */ 667 struct { 668 u32 hard; /* Maximum lifetime (sec) */ 669 u32 idle; /* Max time since last data packet (msec) */ 670 u32 normal; /* Max time since last call packet (msec) */ 671 } timeouts; 672 u8 nr_timeouts; /* Number of timeouts specified */ 673 }; 674 675 struct rxrpc_send_params { 676 struct rxrpc_call_params call; 677 u32 abort_code; /* Abort code to Tx (if abort) */ 678 enum rxrpc_command command : 8; /* The command to implement */ 679 bool exclusive; /* Shared or exclusive call */ 680 bool upgrade; /* If the connection is upgradeable */ 681 }; 682 683 #include <trace/events/rxrpc.h> 684 685 /* 686 * af_rxrpc.c 687 */ 688 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 689 extern atomic_t rxrpc_debug_id; 690 extern struct workqueue_struct *rxrpc_workqueue; 691 692 /* 693 * call_accept.c 694 */ 695 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 696 void rxrpc_discard_prealloc(struct rxrpc_sock *); 697 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 698 struct rxrpc_connection *, 699 struct sk_buff *); 700 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 701 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 702 rxrpc_notify_rx_t); 703 int rxrpc_reject_call(struct rxrpc_sock *); 704 705 /* 706 * call_event.c 707 */ 708 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 709 enum rxrpc_propose_ack_trace); 710 void rxrpc_process_call(struct work_struct *); 711 712 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 713 unsigned long expire_at, 714 unsigned long now, 715 enum rxrpc_timer_trace why) 716 { 717 trace_rxrpc_timer(call, why, now); 718 timer_reduce(&call->timer, expire_at); 719 } 720 721 /* 722 * call_object.c 723 */ 724 extern const char *const rxrpc_call_states[]; 725 extern const char *const rxrpc_call_completions[]; 726 extern unsigned int rxrpc_max_call_lifetime; 727 extern struct kmem_cache *rxrpc_call_jar; 728 729 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 730 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t); 731 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 732 struct rxrpc_conn_parameters *, 733 struct sockaddr_rxrpc *, 734 struct rxrpc_call_params *, gfp_t); 735 int rxrpc_retry_client_call(struct rxrpc_sock *, 736 struct rxrpc_call *, 737 struct rxrpc_conn_parameters *, 738 struct sockaddr_rxrpc *, 739 gfp_t); 740 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 741 struct sk_buff *); 742 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 743 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 744 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 745 bool __rxrpc_queue_call(struct rxrpc_call *); 746 bool rxrpc_queue_call(struct rxrpc_call *); 747 void rxrpc_see_call(struct rxrpc_call *); 748 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 749 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 750 void rxrpc_cleanup_call(struct rxrpc_call *); 751 void rxrpc_destroy_all_calls(struct rxrpc_net *); 752 753 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 754 { 755 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 756 } 757 758 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 759 { 760 return !rxrpc_is_service_call(call); 761 } 762 763 /* 764 * Transition a call to the complete state. 765 */ 766 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 767 enum rxrpc_call_completion compl, 768 u32 abort_code, 769 int error) 770 { 771 if (call->state < RXRPC_CALL_COMPLETE) { 772 call->abort_code = abort_code; 773 call->error = error; 774 call->completion = compl, 775 call->state = RXRPC_CALL_COMPLETE; 776 wake_up(&call->waitq); 777 return true; 778 } 779 return false; 780 } 781 782 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 783 enum rxrpc_call_completion compl, 784 u32 abort_code, 785 int error) 786 { 787 bool ret; 788 789 write_lock_bh(&call->state_lock); 790 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 791 write_unlock_bh(&call->state_lock); 792 return ret; 793 } 794 795 /* 796 * Record that a call successfully completed. 797 */ 798 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 799 { 800 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 801 } 802 803 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 804 { 805 bool ret; 806 807 write_lock_bh(&call->state_lock); 808 ret = __rxrpc_call_completed(call); 809 write_unlock_bh(&call->state_lock); 810 return ret; 811 } 812 813 /* 814 * Record that a call is locally aborted. 815 */ 816 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 817 rxrpc_seq_t seq, 818 u32 abort_code, int error) 819 { 820 trace_rxrpc_abort(why, call->cid, call->call_id, seq, 821 abort_code, error); 822 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 823 abort_code, error); 824 } 825 826 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 827 rxrpc_seq_t seq, u32 abort_code, int error) 828 { 829 bool ret; 830 831 write_lock_bh(&call->state_lock); 832 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 833 write_unlock_bh(&call->state_lock); 834 return ret; 835 } 836 837 /* 838 * Abort a call due to a protocol error. 839 */ 840 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 841 struct sk_buff *skb, 842 const char *eproto_why, 843 const char *why, 844 u32 abort_code) 845 { 846 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 847 848 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 849 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 850 } 851 852 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 853 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 854 (abort_why), (abort_code)) 855 856 /* 857 * conn_client.c 858 */ 859 extern unsigned int rxrpc_max_client_connections; 860 extern unsigned int rxrpc_reap_client_connections; 861 extern unsigned long rxrpc_conn_idle_client_expiry; 862 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 863 extern struct idr rxrpc_client_conn_ids; 864 865 void rxrpc_destroy_client_conn_ids(void); 866 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 867 struct sockaddr_rxrpc *, gfp_t); 868 void rxrpc_expose_client_call(struct rxrpc_call *); 869 void rxrpc_disconnect_client_call(struct rxrpc_call *); 870 void rxrpc_put_client_conn(struct rxrpc_connection *); 871 void rxrpc_discard_expired_client_conns(struct work_struct *); 872 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 873 874 /* 875 * conn_event.c 876 */ 877 void rxrpc_process_connection(struct work_struct *); 878 879 /* 880 * conn_object.c 881 */ 882 extern unsigned int rxrpc_connection_expiry; 883 884 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 885 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 886 struct sk_buff *); 887 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 888 void rxrpc_disconnect_call(struct rxrpc_call *); 889 void rxrpc_kill_connection(struct rxrpc_connection *); 890 bool rxrpc_queue_conn(struct rxrpc_connection *); 891 void rxrpc_see_connection(struct rxrpc_connection *); 892 void rxrpc_get_connection(struct rxrpc_connection *); 893 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 894 void rxrpc_put_service_conn(struct rxrpc_connection *); 895 void rxrpc_service_connection_reaper(struct work_struct *); 896 void rxrpc_destroy_all_connections(struct rxrpc_net *); 897 898 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 899 { 900 return conn->out_clientflag; 901 } 902 903 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 904 { 905 return !rxrpc_conn_is_client(conn); 906 } 907 908 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 909 { 910 if (!conn) 911 return; 912 913 if (rxrpc_conn_is_client(conn)) 914 rxrpc_put_client_conn(conn); 915 else 916 rxrpc_put_service_conn(conn); 917 } 918 919 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 920 unsigned long expire_at) 921 { 922 timer_reduce(&conn->timer, expire_at); 923 } 924 925 /* 926 * conn_service.c 927 */ 928 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 929 struct sk_buff *); 930 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 931 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 932 struct rxrpc_connection *, struct sk_buff *); 933 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 934 935 /* 936 * input.c 937 */ 938 void rxrpc_data_ready(struct sock *); 939 940 /* 941 * insecure.c 942 */ 943 extern const struct rxrpc_security rxrpc_no_security; 944 945 /* 946 * key.c 947 */ 948 extern struct key_type key_type_rxrpc; 949 extern struct key_type key_type_rxrpc_s; 950 951 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 952 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 953 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 954 u32); 955 956 /* 957 * local_event.c 958 */ 959 extern void rxrpc_process_local_events(struct rxrpc_local *); 960 961 /* 962 * local_object.c 963 */ 964 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 965 void __rxrpc_put_local(struct rxrpc_local *); 966 void rxrpc_destroy_all_locals(struct rxrpc_net *); 967 968 static inline void rxrpc_get_local(struct rxrpc_local *local) 969 { 970 atomic_inc(&local->usage); 971 } 972 973 static inline 974 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 975 { 976 return atomic_inc_not_zero(&local->usage) ? local : NULL; 977 } 978 979 static inline void rxrpc_put_local(struct rxrpc_local *local) 980 { 981 if (local && atomic_dec_and_test(&local->usage)) 982 __rxrpc_put_local(local); 983 } 984 985 static inline void rxrpc_queue_local(struct rxrpc_local *local) 986 { 987 rxrpc_queue_work(&local->processor); 988 } 989 990 /* 991 * misc.c 992 */ 993 extern unsigned int rxrpc_max_backlog __read_mostly; 994 extern unsigned long rxrpc_requested_ack_delay; 995 extern unsigned long rxrpc_soft_ack_delay; 996 extern unsigned long rxrpc_idle_ack_delay; 997 extern unsigned int rxrpc_rx_window_size; 998 extern unsigned int rxrpc_rx_mtu; 999 extern unsigned int rxrpc_rx_jumbo_max; 1000 extern unsigned long rxrpc_resend_timeout; 1001 1002 extern const s8 rxrpc_ack_priority[]; 1003 1004 /* 1005 * net_ns.c 1006 */ 1007 extern unsigned int rxrpc_net_id; 1008 extern struct pernet_operations rxrpc_net_ops; 1009 1010 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1011 { 1012 return net_generic(net, rxrpc_net_id); 1013 } 1014 1015 /* 1016 * output.c 1017 */ 1018 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1019 int rxrpc_send_abort_packet(struct rxrpc_call *); 1020 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1021 void rxrpc_reject_packets(struct rxrpc_local *); 1022 1023 /* 1024 * peer_event.c 1025 */ 1026 void rxrpc_error_report(struct sock *); 1027 void rxrpc_peer_error_distributor(struct work_struct *); 1028 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1029 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1030 1031 /* 1032 * peer_object.c 1033 */ 1034 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1035 const struct sockaddr_rxrpc *); 1036 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1037 struct sockaddr_rxrpc *, gfp_t); 1038 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1039 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1040 struct rxrpc_peer *); 1041 1042 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) 1043 { 1044 atomic_inc(&peer->usage); 1045 return peer; 1046 } 1047 1048 static inline 1049 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 1050 { 1051 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 1052 } 1053 1054 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 1055 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 1056 { 1057 if (peer && atomic_dec_and_test(&peer->usage)) 1058 __rxrpc_put_peer(peer); 1059 } 1060 1061 /* 1062 * proc.c 1063 */ 1064 extern const struct file_operations rxrpc_call_seq_fops; 1065 extern const struct file_operations rxrpc_connection_seq_fops; 1066 1067 /* 1068 * recvmsg.c 1069 */ 1070 void rxrpc_notify_socket(struct rxrpc_call *); 1071 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1072 1073 /* 1074 * rxkad.c 1075 */ 1076 #ifdef CONFIG_RXKAD 1077 extern const struct rxrpc_security rxkad; 1078 #endif 1079 1080 /* 1081 * security.c 1082 */ 1083 int __init rxrpc_init_security(void); 1084 void rxrpc_exit_security(void); 1085 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1086 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1087 1088 /* 1089 * sendmsg.c 1090 */ 1091 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1092 1093 /* 1094 * skbuff.c 1095 */ 1096 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1097 void rxrpc_packet_destructor(struct sk_buff *); 1098 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1099 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1100 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1101 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1102 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1103 void rxrpc_purge_queue(struct sk_buff_head *); 1104 1105 /* 1106 * sysctl.c 1107 */ 1108 #ifdef CONFIG_SYSCTL 1109 extern int __init rxrpc_sysctl_init(void); 1110 extern void rxrpc_sysctl_exit(void); 1111 #else 1112 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1113 static inline void rxrpc_sysctl_exit(void) {} 1114 #endif 1115 1116 /* 1117 * utils.c 1118 */ 1119 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1120 struct sk_buff *); 1121 1122 static inline bool before(u32 seq1, u32 seq2) 1123 { 1124 return (s32)(seq1 - seq2) < 0; 1125 } 1126 static inline bool before_eq(u32 seq1, u32 seq2) 1127 { 1128 return (s32)(seq1 - seq2) <= 0; 1129 } 1130 static inline bool after(u32 seq1, u32 seq2) 1131 { 1132 return (s32)(seq1 - seq2) > 0; 1133 } 1134 static inline bool after_eq(u32 seq1, u32 seq2) 1135 { 1136 return (s32)(seq1 - seq2) >= 0; 1137 } 1138 1139 /* 1140 * debug tracing 1141 */ 1142 extern unsigned int rxrpc_debug; 1143 1144 #define dbgprintk(FMT,...) \ 1145 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1146 1147 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1148 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1149 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1150 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1151 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1152 1153 1154 #if defined(__KDEBUG) 1155 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1156 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1157 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1158 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1159 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1160 1161 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1162 #define RXRPC_DEBUG_KENTER 0x01 1163 #define RXRPC_DEBUG_KLEAVE 0x02 1164 #define RXRPC_DEBUG_KDEBUG 0x04 1165 #define RXRPC_DEBUG_KPROTO 0x08 1166 #define RXRPC_DEBUG_KNET 0x10 1167 1168 #define _enter(FMT,...) \ 1169 do { \ 1170 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1171 kenter(FMT,##__VA_ARGS__); \ 1172 } while (0) 1173 1174 #define _leave(FMT,...) \ 1175 do { \ 1176 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1177 kleave(FMT,##__VA_ARGS__); \ 1178 } while (0) 1179 1180 #define _debug(FMT,...) \ 1181 do { \ 1182 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1183 kdebug(FMT,##__VA_ARGS__); \ 1184 } while (0) 1185 1186 #define _proto(FMT,...) \ 1187 do { \ 1188 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1189 kproto(FMT,##__VA_ARGS__); \ 1190 } while (0) 1191 1192 #define _net(FMT,...) \ 1193 do { \ 1194 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1195 knet(FMT,##__VA_ARGS__); \ 1196 } while (0) 1197 1198 #else 1199 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1200 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1201 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1202 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1203 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1204 #endif 1205 1206 /* 1207 * debug assertion checking 1208 */ 1209 #if 1 // defined(__KDEBUGALL) 1210 1211 #define ASSERT(X) \ 1212 do { \ 1213 if (unlikely(!(X))) { \ 1214 pr_err("Assertion failed\n"); \ 1215 BUG(); \ 1216 } \ 1217 } while (0) 1218 1219 #define ASSERTCMP(X, OP, Y) \ 1220 do { \ 1221 __typeof__(X) _x = (X); \ 1222 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1223 if (unlikely(!(_x OP _y))) { \ 1224 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1225 (unsigned long)_x, (unsigned long)_x, #OP, \ 1226 (unsigned long)_y, (unsigned long)_y); \ 1227 BUG(); \ 1228 } \ 1229 } while (0) 1230 1231 #define ASSERTIF(C, X) \ 1232 do { \ 1233 if (unlikely((C) && !(X))) { \ 1234 pr_err("Assertion failed\n"); \ 1235 BUG(); \ 1236 } \ 1237 } while (0) 1238 1239 #define ASSERTIFCMP(C, X, OP, Y) \ 1240 do { \ 1241 __typeof__(X) _x = (X); \ 1242 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1243 if (unlikely((C) && !(_x OP _y))) { \ 1244 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1245 (unsigned long)_x, (unsigned long)_x, #OP, \ 1246 (unsigned long)_y, (unsigned long)_y); \ 1247 BUG(); \ 1248 } \ 1249 } while (0) 1250 1251 #else 1252 1253 #define ASSERT(X) \ 1254 do { \ 1255 } while (0) 1256 1257 #define ASSERTCMP(X, OP, Y) \ 1258 do { \ 1259 } while (0) 1260 1261 #define ASSERTIF(C, X) \ 1262 do { \ 1263 } while (0) 1264 1265 #define ASSERTIFCMP(C, X, OP, Y) \ 1266 do { \ 1267 } while (0) 1268 1269 #endif /* __KDEBUGALL */ 1270