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 }; 475 476 /* 477 * The states that a call can be in. 478 */ 479 enum rxrpc_call_state { 480 RXRPC_CALL_UNINITIALISED, 481 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 482 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 483 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 484 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 485 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 486 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 487 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 488 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 489 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 490 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 491 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 492 RXRPC_CALL_COMPLETE, /* - call complete */ 493 NR__RXRPC_CALL_STATES 494 }; 495 496 /* 497 * Call Tx congestion management modes. 498 */ 499 enum rxrpc_congest_mode { 500 RXRPC_CALL_SLOW_START, 501 RXRPC_CALL_CONGEST_AVOIDANCE, 502 RXRPC_CALL_PACKET_LOSS, 503 RXRPC_CALL_FAST_RETRANSMIT, 504 NR__RXRPC_CONGEST_MODES 505 }; 506 507 /* 508 * RxRPC call definition 509 * - matched by { connection, call_id } 510 */ 511 struct rxrpc_call { 512 struct rcu_head rcu; 513 struct rxrpc_connection *conn; /* connection carrying call */ 514 struct rxrpc_peer *peer; /* Peer record for remote address */ 515 struct rxrpc_sock __rcu *socket; /* socket responsible */ 516 struct mutex user_mutex; /* User access mutex */ 517 unsigned long ack_at; /* When deferred ACK needs to happen */ 518 unsigned long resend_at; /* When next resend needs to happen */ 519 unsigned long ping_at; /* When next to send a ping */ 520 unsigned long expect_rx_by; /* When we expect to get a packet by */ 521 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 522 unsigned long expect_term_by; /* When we expect call termination by */ 523 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 524 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 525 struct timer_list timer; /* Combined event timer */ 526 struct work_struct processor; /* Event processor */ 527 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 528 struct list_head link; /* link in master call list */ 529 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 530 struct hlist_node error_link; /* link in error distribution list */ 531 struct list_head accept_link; /* Link in rx->acceptq */ 532 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 533 struct list_head sock_link; /* Link in rx->sock_calls */ 534 struct rb_node sock_node; /* Node in rx->calls */ 535 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 536 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 537 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 538 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 539 unsigned long user_call_ID; /* user-defined call ID */ 540 unsigned long flags; 541 unsigned long events; 542 spinlock_t lock; 543 spinlock_t notify_lock; /* Kernel notification lock */ 544 rwlock_t state_lock; /* lock for state transition */ 545 u32 abort_code; /* Local/remote abort code */ 546 int error; /* Local error incurred */ 547 enum rxrpc_call_state state; /* current state of call */ 548 enum rxrpc_call_completion completion; /* Call completion condition */ 549 atomic_t usage; 550 u16 service_id; /* service ID */ 551 u8 security_ix; /* Security type */ 552 u32 call_id; /* call ID on connection */ 553 u32 cid; /* connection ID plus channel index */ 554 int debug_id; /* debug ID for printks */ 555 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 556 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 557 558 /* Rx/Tx circular buffer, depending on phase. 559 * 560 * In the Rx phase, packets are annotated with 0 or the number of the 561 * segment of a jumbo packet each buffer refers to. There can be up to 562 * 47 segments in a maximum-size UDP packet. 563 * 564 * In the Tx phase, packets are annotated with which buffers have been 565 * acked. 566 */ 567 #define RXRPC_RXTX_BUFF_SIZE 64 568 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 569 #define RXRPC_INIT_RX_WINDOW_SIZE 32 570 struct sk_buff **rxtx_buffer; 571 u8 *rxtx_annotations; 572 #define RXRPC_TX_ANNO_ACK 0 573 #define RXRPC_TX_ANNO_UNACK 1 574 #define RXRPC_TX_ANNO_NAK 2 575 #define RXRPC_TX_ANNO_RETRANS 3 576 #define RXRPC_TX_ANNO_MASK 0x03 577 #define RXRPC_TX_ANNO_LAST 0x04 578 #define RXRPC_TX_ANNO_RESENT 0x08 579 580 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 581 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 582 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 583 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 584 * not hard-ACK'd packet follows this. 585 */ 586 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 587 588 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 589 * is fixed, we keep these numbers in terms of segments (ie. DATA 590 * packets) rather than bytes. 591 */ 592 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 593 u8 cong_cwnd; /* Congestion window size */ 594 u8 cong_extra; /* Extra to send for congestion management */ 595 u8 cong_ssthresh; /* Slow-start threshold */ 596 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 597 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 598 u8 cong_cumul_acks; /* Cumulative ACK count */ 599 ktime_t cong_tstamp; /* Last time cwnd was changed */ 600 601 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 602 * consumed packet follows this. 603 */ 604 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 605 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 606 u8 rx_winsize; /* Size of Rx window */ 607 u8 tx_winsize; /* Maximum size of Tx window */ 608 bool tx_phase; /* T if transmission phase, F if receive phase */ 609 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 610 611 /* receive-phase ACK management */ 612 u8 ackr_reason; /* reason to ACK */ 613 u16 ackr_skew; /* skew on packet being ACK'd */ 614 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 615 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 616 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 617 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 618 619 /* ping management */ 620 rxrpc_serial_t ping_serial; /* Last ping sent */ 621 ktime_t ping_time; /* Time last ping sent */ 622 623 /* transmission-phase ACK management */ 624 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 625 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 626 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 627 }; 628 629 /* 630 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 631 */ 632 struct rxrpc_ack_summary { 633 u8 ack_reason; 634 u8 nr_acks; /* Number of ACKs in packet */ 635 u8 nr_nacks; /* Number of NACKs in packet */ 636 u8 nr_new_acks; /* Number of new ACKs in packet */ 637 u8 nr_new_nacks; /* Number of new NACKs in packet */ 638 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 639 bool new_low_nack; /* T if new low NACK found */ 640 bool retrans_timeo; /* T if reTx due to timeout happened */ 641 u8 flight_size; /* Number of unreceived transmissions */ 642 /* Place to stash values for tracing */ 643 enum rxrpc_congest_mode mode:8; 644 u8 cwnd; 645 u8 ssthresh; 646 u8 dup_acks; 647 u8 cumulative_acks; 648 }; 649 650 /* 651 * sendmsg() cmsg-specified parameters. 652 */ 653 enum rxrpc_command { 654 RXRPC_CMD_SEND_DATA, /* send data message */ 655 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 656 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 657 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 658 }; 659 660 struct rxrpc_call_params { 661 s64 tx_total_len; /* Total Tx data length (if send data) */ 662 unsigned long user_call_ID; /* User's call ID */ 663 struct { 664 u32 hard; /* Maximum lifetime (sec) */ 665 u32 idle; /* Max time since last data packet (msec) */ 666 u32 normal; /* Max time since last call packet (msec) */ 667 } timeouts; 668 u8 nr_timeouts; /* Number of timeouts specified */ 669 }; 670 671 struct rxrpc_send_params { 672 struct rxrpc_call_params call; 673 u32 abort_code; /* Abort code to Tx (if abort) */ 674 enum rxrpc_command command : 8; /* The command to implement */ 675 bool exclusive; /* Shared or exclusive call */ 676 bool upgrade; /* If the connection is upgradeable */ 677 }; 678 679 #include <trace/events/rxrpc.h> 680 681 /* 682 * af_rxrpc.c 683 */ 684 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 685 extern atomic_t rxrpc_debug_id; 686 extern struct workqueue_struct *rxrpc_workqueue; 687 688 /* 689 * call_accept.c 690 */ 691 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 692 void rxrpc_discard_prealloc(struct rxrpc_sock *); 693 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 694 struct rxrpc_connection *, 695 struct sk_buff *); 696 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 697 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 698 rxrpc_notify_rx_t); 699 int rxrpc_reject_call(struct rxrpc_sock *); 700 701 /* 702 * call_event.c 703 */ 704 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 705 enum rxrpc_propose_ack_trace); 706 void rxrpc_process_call(struct work_struct *); 707 708 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 709 unsigned long expire_at, 710 unsigned long now, 711 enum rxrpc_timer_trace why) 712 { 713 trace_rxrpc_timer(call, why, now); 714 timer_reduce(&call->timer, expire_at); 715 } 716 717 /* 718 * call_object.c 719 */ 720 extern const char *const rxrpc_call_states[]; 721 extern const char *const rxrpc_call_completions[]; 722 extern unsigned int rxrpc_max_call_lifetime; 723 extern struct kmem_cache *rxrpc_call_jar; 724 725 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 726 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t); 727 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 728 struct rxrpc_conn_parameters *, 729 struct sockaddr_rxrpc *, 730 struct rxrpc_call_params *, gfp_t); 731 int rxrpc_retry_client_call(struct rxrpc_sock *, 732 struct rxrpc_call *, 733 struct rxrpc_conn_parameters *, 734 struct sockaddr_rxrpc *, 735 gfp_t); 736 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 737 struct sk_buff *); 738 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 739 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 740 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 741 bool __rxrpc_queue_call(struct rxrpc_call *); 742 bool rxrpc_queue_call(struct rxrpc_call *); 743 void rxrpc_see_call(struct rxrpc_call *); 744 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 745 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 746 void rxrpc_cleanup_call(struct rxrpc_call *); 747 void rxrpc_destroy_all_calls(struct rxrpc_net *); 748 749 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 750 { 751 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 752 } 753 754 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 755 { 756 return !rxrpc_is_service_call(call); 757 } 758 759 /* 760 * Transition a call to the complete state. 761 */ 762 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 763 enum rxrpc_call_completion compl, 764 u32 abort_code, 765 int error) 766 { 767 if (call->state < RXRPC_CALL_COMPLETE) { 768 call->abort_code = abort_code; 769 call->error = error; 770 call->completion = compl, 771 call->state = RXRPC_CALL_COMPLETE; 772 wake_up(&call->waitq); 773 return true; 774 } 775 return false; 776 } 777 778 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 779 enum rxrpc_call_completion compl, 780 u32 abort_code, 781 int error) 782 { 783 bool ret; 784 785 write_lock_bh(&call->state_lock); 786 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 787 write_unlock_bh(&call->state_lock); 788 return ret; 789 } 790 791 /* 792 * Record that a call successfully completed. 793 */ 794 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 795 { 796 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 797 } 798 799 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 800 { 801 bool ret; 802 803 write_lock_bh(&call->state_lock); 804 ret = __rxrpc_call_completed(call); 805 write_unlock_bh(&call->state_lock); 806 return ret; 807 } 808 809 /* 810 * Record that a call is locally aborted. 811 */ 812 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 813 rxrpc_seq_t seq, 814 u32 abort_code, int error) 815 { 816 trace_rxrpc_abort(why, call->cid, call->call_id, seq, 817 abort_code, error); 818 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 819 abort_code, error); 820 } 821 822 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 823 rxrpc_seq_t seq, u32 abort_code, int error) 824 { 825 bool ret; 826 827 write_lock_bh(&call->state_lock); 828 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 829 write_unlock_bh(&call->state_lock); 830 return ret; 831 } 832 833 /* 834 * Abort a call due to a protocol error. 835 */ 836 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 837 struct sk_buff *skb, 838 const char *eproto_why, 839 const char *why, 840 u32 abort_code) 841 { 842 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 843 844 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 845 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 846 } 847 848 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 849 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 850 (abort_why), (abort_code)) 851 852 /* 853 * conn_client.c 854 */ 855 extern unsigned int rxrpc_max_client_connections; 856 extern unsigned int rxrpc_reap_client_connections; 857 extern unsigned long rxrpc_conn_idle_client_expiry; 858 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 859 extern struct idr rxrpc_client_conn_ids; 860 861 void rxrpc_destroy_client_conn_ids(void); 862 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 863 struct sockaddr_rxrpc *, gfp_t); 864 void rxrpc_expose_client_call(struct rxrpc_call *); 865 void rxrpc_disconnect_client_call(struct rxrpc_call *); 866 void rxrpc_put_client_conn(struct rxrpc_connection *); 867 void rxrpc_discard_expired_client_conns(struct work_struct *); 868 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 869 870 /* 871 * conn_event.c 872 */ 873 void rxrpc_process_connection(struct work_struct *); 874 875 /* 876 * conn_object.c 877 */ 878 extern unsigned int rxrpc_connection_expiry; 879 880 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 881 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 882 struct sk_buff *); 883 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 884 void rxrpc_disconnect_call(struct rxrpc_call *); 885 void rxrpc_kill_connection(struct rxrpc_connection *); 886 bool rxrpc_queue_conn(struct rxrpc_connection *); 887 void rxrpc_see_connection(struct rxrpc_connection *); 888 void rxrpc_get_connection(struct rxrpc_connection *); 889 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 890 void rxrpc_put_service_conn(struct rxrpc_connection *); 891 void rxrpc_service_connection_reaper(struct work_struct *); 892 void rxrpc_destroy_all_connections(struct rxrpc_net *); 893 894 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 895 { 896 return conn->out_clientflag; 897 } 898 899 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 900 { 901 return !rxrpc_conn_is_client(conn); 902 } 903 904 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 905 { 906 if (!conn) 907 return; 908 909 if (rxrpc_conn_is_client(conn)) 910 rxrpc_put_client_conn(conn); 911 else 912 rxrpc_put_service_conn(conn); 913 } 914 915 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 916 unsigned long expire_at) 917 { 918 timer_reduce(&conn->timer, expire_at); 919 } 920 921 /* 922 * conn_service.c 923 */ 924 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 925 struct sk_buff *); 926 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 927 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 928 struct rxrpc_connection *, struct sk_buff *); 929 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 930 931 /* 932 * input.c 933 */ 934 void rxrpc_data_ready(struct sock *); 935 936 /* 937 * insecure.c 938 */ 939 extern const struct rxrpc_security rxrpc_no_security; 940 941 /* 942 * key.c 943 */ 944 extern struct key_type key_type_rxrpc; 945 extern struct key_type key_type_rxrpc_s; 946 947 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 948 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 949 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 950 u32); 951 952 /* 953 * local_event.c 954 */ 955 extern void rxrpc_process_local_events(struct rxrpc_local *); 956 957 /* 958 * local_object.c 959 */ 960 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 961 void __rxrpc_put_local(struct rxrpc_local *); 962 void rxrpc_destroy_all_locals(struct rxrpc_net *); 963 964 static inline void rxrpc_get_local(struct rxrpc_local *local) 965 { 966 atomic_inc(&local->usage); 967 } 968 969 static inline 970 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 971 { 972 return atomic_inc_not_zero(&local->usage) ? local : NULL; 973 } 974 975 static inline void rxrpc_put_local(struct rxrpc_local *local) 976 { 977 if (local && atomic_dec_and_test(&local->usage)) 978 __rxrpc_put_local(local); 979 } 980 981 static inline void rxrpc_queue_local(struct rxrpc_local *local) 982 { 983 rxrpc_queue_work(&local->processor); 984 } 985 986 /* 987 * misc.c 988 */ 989 extern unsigned int rxrpc_max_backlog __read_mostly; 990 extern unsigned long rxrpc_requested_ack_delay; 991 extern unsigned long rxrpc_soft_ack_delay; 992 extern unsigned long rxrpc_idle_ack_delay; 993 extern unsigned int rxrpc_rx_window_size; 994 extern unsigned int rxrpc_rx_mtu; 995 extern unsigned int rxrpc_rx_jumbo_max; 996 extern unsigned long rxrpc_resend_timeout; 997 998 extern const s8 rxrpc_ack_priority[]; 999 1000 /* 1001 * net_ns.c 1002 */ 1003 extern unsigned int rxrpc_net_id; 1004 extern struct pernet_operations rxrpc_net_ops; 1005 1006 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1007 { 1008 return net_generic(net, rxrpc_net_id); 1009 } 1010 1011 /* 1012 * output.c 1013 */ 1014 int rxrpc_send_ack_packet(struct rxrpc_call *, bool); 1015 int rxrpc_send_abort_packet(struct rxrpc_call *); 1016 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1017 void rxrpc_reject_packets(struct rxrpc_local *); 1018 1019 /* 1020 * peer_event.c 1021 */ 1022 void rxrpc_error_report(struct sock *); 1023 void rxrpc_peer_error_distributor(struct work_struct *); 1024 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1025 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1026 1027 /* 1028 * peer_object.c 1029 */ 1030 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1031 const struct sockaddr_rxrpc *); 1032 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1033 struct sockaddr_rxrpc *, gfp_t); 1034 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1035 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1036 struct rxrpc_peer *); 1037 1038 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) 1039 { 1040 atomic_inc(&peer->usage); 1041 return peer; 1042 } 1043 1044 static inline 1045 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 1046 { 1047 return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 1048 } 1049 1050 extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 1051 static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 1052 { 1053 if (peer && atomic_dec_and_test(&peer->usage)) 1054 __rxrpc_put_peer(peer); 1055 } 1056 1057 /* 1058 * proc.c 1059 */ 1060 extern const struct file_operations rxrpc_call_seq_fops; 1061 extern const struct file_operations rxrpc_connection_seq_fops; 1062 1063 /* 1064 * recvmsg.c 1065 */ 1066 void rxrpc_notify_socket(struct rxrpc_call *); 1067 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1068 1069 /* 1070 * rxkad.c 1071 */ 1072 #ifdef CONFIG_RXKAD 1073 extern const struct rxrpc_security rxkad; 1074 #endif 1075 1076 /* 1077 * security.c 1078 */ 1079 int __init rxrpc_init_security(void); 1080 void rxrpc_exit_security(void); 1081 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1082 int rxrpc_init_server_conn_security(struct rxrpc_connection *); 1083 1084 /* 1085 * sendmsg.c 1086 */ 1087 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1088 1089 /* 1090 * skbuff.c 1091 */ 1092 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1093 void rxrpc_packet_destructor(struct sk_buff *); 1094 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1095 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1096 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1097 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1098 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1099 void rxrpc_purge_queue(struct sk_buff_head *); 1100 1101 /* 1102 * sysctl.c 1103 */ 1104 #ifdef CONFIG_SYSCTL 1105 extern int __init rxrpc_sysctl_init(void); 1106 extern void rxrpc_sysctl_exit(void); 1107 #else 1108 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1109 static inline void rxrpc_sysctl_exit(void) {} 1110 #endif 1111 1112 /* 1113 * utils.c 1114 */ 1115 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 1116 struct sk_buff *); 1117 1118 static inline bool before(u32 seq1, u32 seq2) 1119 { 1120 return (s32)(seq1 - seq2) < 0; 1121 } 1122 static inline bool before_eq(u32 seq1, u32 seq2) 1123 { 1124 return (s32)(seq1 - seq2) <= 0; 1125 } 1126 static inline bool after(u32 seq1, u32 seq2) 1127 { 1128 return (s32)(seq1 - seq2) > 0; 1129 } 1130 static inline bool after_eq(u32 seq1, u32 seq2) 1131 { 1132 return (s32)(seq1 - seq2) >= 0; 1133 } 1134 1135 /* 1136 * debug tracing 1137 */ 1138 extern unsigned int rxrpc_debug; 1139 1140 #define dbgprintk(FMT,...) \ 1141 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1142 1143 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1144 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1145 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1146 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1147 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1148 1149 1150 #if defined(__KDEBUG) 1151 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1152 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1153 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1154 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1155 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1156 1157 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1158 #define RXRPC_DEBUG_KENTER 0x01 1159 #define RXRPC_DEBUG_KLEAVE 0x02 1160 #define RXRPC_DEBUG_KDEBUG 0x04 1161 #define RXRPC_DEBUG_KPROTO 0x08 1162 #define RXRPC_DEBUG_KNET 0x10 1163 1164 #define _enter(FMT,...) \ 1165 do { \ 1166 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1167 kenter(FMT,##__VA_ARGS__); \ 1168 } while (0) 1169 1170 #define _leave(FMT,...) \ 1171 do { \ 1172 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1173 kleave(FMT,##__VA_ARGS__); \ 1174 } while (0) 1175 1176 #define _debug(FMT,...) \ 1177 do { \ 1178 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1179 kdebug(FMT,##__VA_ARGS__); \ 1180 } while (0) 1181 1182 #define _proto(FMT,...) \ 1183 do { \ 1184 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1185 kproto(FMT,##__VA_ARGS__); \ 1186 } while (0) 1187 1188 #define _net(FMT,...) \ 1189 do { \ 1190 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1191 knet(FMT,##__VA_ARGS__); \ 1192 } while (0) 1193 1194 #else 1195 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1196 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1197 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1198 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1199 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1200 #endif 1201 1202 /* 1203 * debug assertion checking 1204 */ 1205 #if 1 // defined(__KDEBUGALL) 1206 1207 #define ASSERT(X) \ 1208 do { \ 1209 if (unlikely(!(X))) { \ 1210 pr_err("Assertion failed\n"); \ 1211 BUG(); \ 1212 } \ 1213 } while (0) 1214 1215 #define ASSERTCMP(X, OP, Y) \ 1216 do { \ 1217 __typeof__(X) _x = (X); \ 1218 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1219 if (unlikely(!(_x OP _y))) { \ 1220 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1221 (unsigned long)_x, (unsigned long)_x, #OP, \ 1222 (unsigned long)_y, (unsigned long)_y); \ 1223 BUG(); \ 1224 } \ 1225 } while (0) 1226 1227 #define ASSERTIF(C, X) \ 1228 do { \ 1229 if (unlikely((C) && !(X))) { \ 1230 pr_err("Assertion failed\n"); \ 1231 BUG(); \ 1232 } \ 1233 } while (0) 1234 1235 #define ASSERTIFCMP(C, X, OP, Y) \ 1236 do { \ 1237 __typeof__(X) _x = (X); \ 1238 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1239 if (unlikely((C) && !(_x OP _y))) { \ 1240 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1241 (unsigned long)_x, (unsigned long)_x, #OP, \ 1242 (unsigned long)_y, (unsigned long)_y); \ 1243 BUG(); \ 1244 } \ 1245 } while (0) 1246 1247 #else 1248 1249 #define ASSERT(X) \ 1250 do { \ 1251 } while (0) 1252 1253 #define ASSERTCMP(X, OP, Y) \ 1254 do { \ 1255 } while (0) 1256 1257 #define ASSERTIF(C, X) \ 1258 do { \ 1259 } while (0) 1260 1261 #define ASSERTIFCMP(C, X, OP, Y) \ 1262 do { \ 1263 } while (0) 1264 1265 #endif /* __KDEBUGALL */ 1266