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 in skb->mark. skb->priority is used 44 * to pass supplementary information. 45 */ 46 enum rxrpc_skb_mark { 47 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 48 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 49 }; 50 51 /* 52 * sk_state for RxRPC sockets 53 */ 54 enum { 55 RXRPC_UNBOUND = 0, 56 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 57 RXRPC_CLIENT_BOUND, /* client local address bound */ 58 RXRPC_SERVER_BOUND, /* server local address bound */ 59 RXRPC_SERVER_BOUND2, /* second server local address bound */ 60 RXRPC_SERVER_LISTENING, /* server listening for connections */ 61 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 62 RXRPC_CLOSE, /* socket is being closed */ 63 }; 64 65 /* 66 * Per-network namespace data. 67 */ 68 struct rxrpc_net { 69 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 70 u32 epoch; /* Local epoch for detecting local-end reset */ 71 struct list_head calls; /* List of calls active in this namespace */ 72 rwlock_t call_lock; /* Lock for ->calls */ 73 atomic_t nr_calls; /* Count of allocated calls */ 74 75 atomic_t nr_conns; 76 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 77 struct list_head service_conns; /* Service conns in this namespace */ 78 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 79 struct work_struct service_conn_reaper; 80 struct timer_list service_conn_reap_timer; 81 82 unsigned int nr_client_conns; 83 unsigned int nr_active_client_conns; 84 bool kill_all_client_conns; 85 bool live; 86 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 87 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 88 struct list_head waiting_client_conns; 89 struct list_head active_client_conns; 90 struct list_head idle_client_conns; 91 struct work_struct client_conn_reaper; 92 struct timer_list client_conn_reap_timer; 93 94 struct list_head local_endpoints; 95 struct mutex local_mutex; /* Lock for ->local_endpoints */ 96 97 DECLARE_HASHTABLE (peer_hash, 10); 98 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 99 100 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 101 u8 peer_keepalive_cursor; 102 time64_t peer_keepalive_base; 103 struct list_head peer_keepalive[32]; 104 struct list_head peer_keepalive_new; 105 struct timer_list peer_keepalive_timer; 106 struct work_struct peer_keepalive_work; 107 }; 108 109 /* 110 * Service backlog preallocation. 111 * 112 * This contains circular buffers of preallocated peers, connections and calls 113 * for incoming service calls and their head and tail pointers. This allows 114 * calls to be set up in the data_ready handler, thereby avoiding the need to 115 * shuffle packets around so much. 116 */ 117 struct rxrpc_backlog { 118 unsigned short peer_backlog_head; 119 unsigned short peer_backlog_tail; 120 unsigned short conn_backlog_head; 121 unsigned short conn_backlog_tail; 122 unsigned short call_backlog_head; 123 unsigned short call_backlog_tail; 124 #define RXRPC_BACKLOG_MAX 32 125 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 126 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 127 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 128 }; 129 130 /* 131 * RxRPC socket definition 132 */ 133 struct rxrpc_sock { 134 /* WARNING: sk has to be the first member */ 135 struct sock sk; 136 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 137 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 138 struct rxrpc_local *local; /* local endpoint */ 139 struct rxrpc_backlog *backlog; /* Preallocation for services */ 140 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 141 struct list_head sock_calls; /* List of calls owned by this socket */ 142 struct list_head to_be_accepted; /* calls awaiting acceptance */ 143 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 144 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 145 struct key *key; /* security for this socket */ 146 struct key *securities; /* list of server security descriptors */ 147 struct rb_root calls; /* User ID -> call mapping */ 148 unsigned long flags; 149 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 150 rwlock_t call_lock; /* lock for calls */ 151 u32 min_sec_level; /* minimum security level */ 152 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 153 bool exclusive; /* Exclusive connection for a client socket */ 154 u16 second_service; /* Additional service bound to the endpoint */ 155 struct { 156 /* Service upgrade information */ 157 u16 from; /* Service ID to upgrade (if not 0) */ 158 u16 to; /* service ID to upgrade to */ 159 } service_upgrade; 160 sa_family_t family; /* Protocol family created with */ 161 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 162 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 163 }; 164 165 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 166 167 /* 168 * CPU-byteorder normalised Rx packet header. 169 */ 170 struct rxrpc_host_header { 171 u32 epoch; /* client boot timestamp */ 172 u32 cid; /* connection and channel ID */ 173 u32 callNumber; /* call ID (0 for connection-level packets) */ 174 u32 seq; /* sequence number of pkt in call stream */ 175 u32 serial; /* serial number of pkt sent to network */ 176 u8 type; /* packet type */ 177 u8 flags; /* packet flags */ 178 u8 userStatus; /* app-layer defined status */ 179 u8 securityIndex; /* security protocol ID */ 180 union { 181 u16 _rsvd; /* reserved */ 182 u16 cksum; /* kerberos security checksum */ 183 }; 184 u16 serviceId; /* service ID */ 185 } __packed; 186 187 /* 188 * RxRPC socket buffer private variables 189 * - max 48 bytes (struct sk_buff::cb) 190 */ 191 struct rxrpc_skb_priv { 192 union { 193 u8 nr_jumbo; /* Number of jumbo subpackets */ 194 }; 195 union { 196 int remain; /* amount of space remaining for next write */ 197 }; 198 199 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 200 }; 201 202 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 203 204 /* 205 * RxRPC security module interface 206 */ 207 struct rxrpc_security { 208 const char *name; /* name of this service */ 209 u8 security_index; /* security type provided */ 210 211 /* Initialise a security service */ 212 int (*init)(void); 213 214 /* Clean up a security service */ 215 void (*exit)(void); 216 217 /* initialise a connection's security */ 218 int (*init_connection_security)(struct rxrpc_connection *); 219 220 /* prime a connection's packet security */ 221 int (*prime_packet_security)(struct rxrpc_connection *); 222 223 /* impose security on a packet */ 224 int (*secure_packet)(struct rxrpc_call *, 225 struct sk_buff *, 226 size_t, 227 void *); 228 229 /* verify the security on a received packet */ 230 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 231 unsigned int, unsigned int, rxrpc_seq_t, u16); 232 233 /* Locate the data in a received packet that has been verified. */ 234 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 235 unsigned int *, unsigned int *); 236 237 /* issue a challenge */ 238 int (*issue_challenge)(struct rxrpc_connection *); 239 240 /* respond to a challenge */ 241 int (*respond_to_challenge)(struct rxrpc_connection *, 242 struct sk_buff *, 243 u32 *); 244 245 /* verify a response */ 246 int (*verify_response)(struct rxrpc_connection *, 247 struct sk_buff *, 248 u32 *); 249 250 /* clear connection security */ 251 void (*clear)(struct rxrpc_connection *); 252 }; 253 254 /* 255 * RxRPC local transport endpoint description 256 * - owned by a single AF_RXRPC socket 257 * - pointed to by transport socket struct sk_user_data 258 */ 259 struct rxrpc_local { 260 struct rcu_head rcu; 261 atomic_t usage; 262 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 263 struct list_head link; 264 struct socket *socket; /* my UDP socket */ 265 struct work_struct processor; 266 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 267 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 268 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 269 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 270 struct rb_root client_conns; /* Client connections by socket params */ 271 spinlock_t client_conns_lock; /* Lock for client_conns */ 272 spinlock_t lock; /* access lock */ 273 rwlock_t services_lock; /* lock for services list */ 274 int debug_id; /* debug ID for printks */ 275 bool dead; 276 bool service_closed; /* Service socket closed */ 277 struct sockaddr_rxrpc srx; /* local address */ 278 }; 279 280 /* 281 * RxRPC remote transport endpoint definition 282 * - matched by local endpoint, remote port, address and protocol type 283 */ 284 struct rxrpc_peer { 285 struct rcu_head rcu; /* This must be first */ 286 atomic_t usage; 287 unsigned long hash_key; 288 struct hlist_node hash_link; 289 struct rxrpc_local *local; 290 struct hlist_head error_targets; /* targets for net error distribution */ 291 struct rb_root service_conns; /* Service connections */ 292 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 293 time64_t last_tx_at; /* Last time packet sent here */ 294 seqlock_t service_conn_lock; 295 spinlock_t lock; /* access lock */ 296 unsigned int if_mtu; /* interface MTU for this peer */ 297 unsigned int mtu; /* network MTU for this peer */ 298 unsigned int maxdata; /* data size (MTU - hdrsize) */ 299 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 300 int debug_id; /* debug ID for printks */ 301 struct sockaddr_rxrpc srx; /* remote address */ 302 303 /* calculated RTT cache */ 304 #define RXRPC_RTT_CACHE_SIZE 32 305 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 306 ktime_t rtt_last_req; /* Time of last RTT request */ 307 u64 rtt; /* Current RTT estimate (in nS) */ 308 u64 rtt_sum; /* Sum of cache contents */ 309 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 310 u8 rtt_cursor; /* next entry at which to insert */ 311 u8 rtt_usage; /* amount of cache actually used */ 312 313 u8 cong_cwnd; /* Congestion window size */ 314 }; 315 316 /* 317 * Keys for matching a connection. 318 */ 319 struct rxrpc_conn_proto { 320 union { 321 struct { 322 u32 epoch; /* epoch of this connection */ 323 u32 cid; /* connection ID */ 324 }; 325 u64 index_key; 326 }; 327 }; 328 329 struct rxrpc_conn_parameters { 330 struct rxrpc_local *local; /* Representation of local endpoint */ 331 struct rxrpc_peer *peer; /* Remote endpoint */ 332 struct key *key; /* Security details */ 333 bool exclusive; /* T if conn is exclusive */ 334 bool upgrade; /* T if service ID can be upgraded */ 335 u16 service_id; /* Service ID for this connection */ 336 u32 security_level; /* Security level selected */ 337 }; 338 339 /* 340 * Bits in the connection flags. 341 */ 342 enum rxrpc_conn_flag { 343 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 344 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 345 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 346 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 347 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 348 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 349 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 350 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 351 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 352 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 353 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 354 }; 355 356 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 357 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 358 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 359 (1UL << RXRPC_CONN_FINAL_ACK_3)) 360 361 /* 362 * Events that can be raised upon a connection. 363 */ 364 enum rxrpc_conn_event { 365 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 366 }; 367 368 /* 369 * The connection cache state. 370 */ 371 enum rxrpc_conn_cache_state { 372 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 373 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 374 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 375 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 376 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 377 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 378 RXRPC_CONN__NR_CACHE_STATES 379 }; 380 381 /* 382 * The connection protocol state. 383 */ 384 enum rxrpc_conn_proto_state { 385 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 386 RXRPC_CONN_CLIENT, /* Client connection */ 387 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 388 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 389 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 390 RXRPC_CONN_SERVICE, /* Service secured connection */ 391 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 392 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 393 RXRPC_CONN__NR_STATES 394 }; 395 396 /* 397 * RxRPC connection definition 398 * - matched by { local, peer, epoch, conn_id, direction } 399 * - each connection can only handle four simultaneous calls 400 */ 401 struct rxrpc_connection { 402 struct rxrpc_conn_proto proto; 403 struct rxrpc_conn_parameters params; 404 405 atomic_t usage; 406 struct rcu_head rcu; 407 struct list_head cache_link; 408 409 spinlock_t channel_lock; 410 unsigned char active_chans; /* Mask of active channels */ 411 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 412 struct list_head waiting_calls; /* Calls waiting for channels */ 413 struct rxrpc_channel { 414 unsigned long final_ack_at; /* Time at which to issue final ACK */ 415 struct rxrpc_call __rcu *call; /* Active call */ 416 unsigned int call_debug_id; /* call->debug_id */ 417 u32 call_id; /* ID of current call */ 418 u32 call_counter; /* Call ID counter */ 419 u32 last_call; /* ID of last call */ 420 u8 last_type; /* Type of last packet */ 421 union { 422 u32 last_seq; 423 u32 last_abort; 424 }; 425 } channels[RXRPC_MAXCALLS]; 426 427 struct timer_list timer; /* Conn event timer */ 428 struct work_struct processor; /* connection event processor */ 429 union { 430 struct rb_node client_node; /* Node in local->client_conns */ 431 struct rb_node service_node; /* Node in peer->service_conns */ 432 }; 433 struct list_head proc_link; /* link in procfs list */ 434 struct list_head link; /* link in master connection list */ 435 struct sk_buff_head rx_queue; /* received conn-level packets */ 436 const struct rxrpc_security *security; /* applied security module */ 437 struct key *server_key; /* security for this service */ 438 struct crypto_sync_skcipher *cipher; /* encryption handle */ 439 struct rxrpc_crypt csum_iv; /* packet checksum base */ 440 unsigned long flags; 441 unsigned long events; 442 unsigned long idle_timestamp; /* Time at which last became idle */ 443 spinlock_t state_lock; /* state-change lock */ 444 enum rxrpc_conn_cache_state cache_state; 445 enum rxrpc_conn_proto_state state; /* current state of connection */ 446 u32 abort_code; /* Abort code of connection abort */ 447 int debug_id; /* debug ID for printks */ 448 atomic_t serial; /* packet serial number counter */ 449 unsigned int hi_serial; /* highest serial number received */ 450 u32 security_nonce; /* response re-use preventer */ 451 u32 service_id; /* Service ID, possibly upgraded */ 452 u8 size_align; /* data size alignment (for security) */ 453 u8 security_size; /* security header size */ 454 u8 security_ix; /* security type */ 455 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 456 short error; /* Local error code */ 457 }; 458 459 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 460 { 461 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 462 } 463 464 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 465 { 466 return !rxrpc_to_server(sp); 467 } 468 469 /* 470 * Flags in call->flags. 471 */ 472 enum rxrpc_call_flag { 473 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 474 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 475 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 476 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 477 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 478 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 479 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 480 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 481 RXRPC_CALL_PINGING, /* Ping in process */ 482 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 483 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 484 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 485 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 486 }; 487 488 /* 489 * Events that can be raised on a call. 490 */ 491 enum rxrpc_call_event { 492 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 493 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 494 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 495 RXRPC_CALL_EV_PING, /* Ping send required */ 496 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 497 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 498 }; 499 500 /* 501 * The states that a call can be in. 502 */ 503 enum rxrpc_call_state { 504 RXRPC_CALL_UNINITIALISED, 505 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 506 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 507 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 508 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 509 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 510 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 511 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 512 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 513 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 514 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 515 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 516 RXRPC_CALL_COMPLETE, /* - call complete */ 517 NR__RXRPC_CALL_STATES 518 }; 519 520 /* 521 * Call Tx congestion management modes. 522 */ 523 enum rxrpc_congest_mode { 524 RXRPC_CALL_SLOW_START, 525 RXRPC_CALL_CONGEST_AVOIDANCE, 526 RXRPC_CALL_PACKET_LOSS, 527 RXRPC_CALL_FAST_RETRANSMIT, 528 NR__RXRPC_CONGEST_MODES 529 }; 530 531 /* 532 * RxRPC call definition 533 * - matched by { connection, call_id } 534 */ 535 struct rxrpc_call { 536 struct rcu_head rcu; 537 struct rxrpc_connection *conn; /* connection carrying call */ 538 struct rxrpc_peer *peer; /* Peer record for remote address */ 539 struct rxrpc_sock __rcu *socket; /* socket responsible */ 540 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 541 struct mutex user_mutex; /* User access mutex */ 542 unsigned long ack_at; /* When deferred ACK needs to happen */ 543 unsigned long ack_lost_at; /* When ACK is figured as lost */ 544 unsigned long resend_at; /* When next resend needs to happen */ 545 unsigned long ping_at; /* When next to send a ping */ 546 unsigned long keepalive_at; /* When next to send a keepalive ping */ 547 unsigned long expect_rx_by; /* When we expect to get a packet by */ 548 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 549 unsigned long expect_term_by; /* When we expect call termination by */ 550 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 551 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 552 struct timer_list timer; /* Combined event timer */ 553 struct work_struct processor; /* Event processor */ 554 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 555 struct list_head link; /* link in master call list */ 556 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 557 struct hlist_node error_link; /* link in error distribution list */ 558 struct list_head accept_link; /* Link in rx->acceptq */ 559 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 560 struct list_head sock_link; /* Link in rx->sock_calls */ 561 struct rb_node sock_node; /* Node in rx->calls */ 562 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 563 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 564 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 565 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 566 unsigned long user_call_ID; /* user-defined call ID */ 567 unsigned long flags; 568 unsigned long events; 569 spinlock_t lock; 570 spinlock_t notify_lock; /* Kernel notification lock */ 571 rwlock_t state_lock; /* lock for state transition */ 572 u32 abort_code; /* Local/remote abort code */ 573 int error; /* Local error incurred */ 574 enum rxrpc_call_state state; /* current state of call */ 575 enum rxrpc_call_completion completion; /* Call completion condition */ 576 atomic_t usage; 577 u16 service_id; /* service ID */ 578 u8 security_ix; /* Security type */ 579 u32 call_id; /* call ID on connection */ 580 u32 cid; /* connection ID plus channel index */ 581 int debug_id; /* debug ID for printks */ 582 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 583 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 584 585 /* Rx/Tx circular buffer, depending on phase. 586 * 587 * In the Rx phase, packets are annotated with 0 or the number of the 588 * segment of a jumbo packet each buffer refers to. There can be up to 589 * 47 segments in a maximum-size UDP packet. 590 * 591 * In the Tx phase, packets are annotated with which buffers have been 592 * acked. 593 */ 594 #define RXRPC_RXTX_BUFF_SIZE 64 595 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 596 #define RXRPC_INIT_RX_WINDOW_SIZE 63 597 struct sk_buff **rxtx_buffer; 598 u8 *rxtx_annotations; 599 #define RXRPC_TX_ANNO_ACK 0 600 #define RXRPC_TX_ANNO_UNACK 1 601 #define RXRPC_TX_ANNO_NAK 2 602 #define RXRPC_TX_ANNO_RETRANS 3 603 #define RXRPC_TX_ANNO_MASK 0x03 604 #define RXRPC_TX_ANNO_LAST 0x04 605 #define RXRPC_TX_ANNO_RESENT 0x08 606 607 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 608 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 609 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 610 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 611 * not hard-ACK'd packet follows this. 612 */ 613 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 614 615 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 616 * is fixed, we keep these numbers in terms of segments (ie. DATA 617 * packets) rather than bytes. 618 */ 619 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 620 u8 cong_cwnd; /* Congestion window size */ 621 u8 cong_extra; /* Extra to send for congestion management */ 622 u8 cong_ssthresh; /* Slow-start threshold */ 623 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 624 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 625 u8 cong_cumul_acks; /* Cumulative ACK count */ 626 ktime_t cong_tstamp; /* Last time cwnd was changed */ 627 628 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 629 * consumed packet follows this. 630 */ 631 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 632 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 633 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 634 u8 rx_winsize; /* Size of Rx window */ 635 u8 tx_winsize; /* Maximum size of Tx window */ 636 bool tx_phase; /* T if transmission phase, F if receive phase */ 637 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 638 639 spinlock_t input_lock; /* Lock for packet input to this call */ 640 641 /* receive-phase ACK management */ 642 u8 ackr_reason; /* reason to ACK */ 643 u16 ackr_skew; /* skew on packet being ACK'd */ 644 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 645 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 646 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 647 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 648 649 /* ping management */ 650 rxrpc_serial_t ping_serial; /* Last ping sent */ 651 ktime_t ping_time; /* Time last ping sent */ 652 653 /* transmission-phase ACK management */ 654 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 655 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 656 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 657 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 658 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 659 }; 660 661 /* 662 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 663 */ 664 struct rxrpc_ack_summary { 665 u8 ack_reason; 666 u8 nr_acks; /* Number of ACKs in packet */ 667 u8 nr_nacks; /* Number of NACKs in packet */ 668 u8 nr_new_acks; /* Number of new ACKs in packet */ 669 u8 nr_new_nacks; /* Number of new NACKs in packet */ 670 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 671 bool new_low_nack; /* T if new low NACK found */ 672 bool retrans_timeo; /* T if reTx due to timeout happened */ 673 u8 flight_size; /* Number of unreceived transmissions */ 674 /* Place to stash values for tracing */ 675 enum rxrpc_congest_mode mode:8; 676 u8 cwnd; 677 u8 ssthresh; 678 u8 dup_acks; 679 u8 cumulative_acks; 680 }; 681 682 /* 683 * sendmsg() cmsg-specified parameters. 684 */ 685 enum rxrpc_command { 686 RXRPC_CMD_SEND_DATA, /* send data message */ 687 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 688 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 689 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 690 }; 691 692 struct rxrpc_call_params { 693 s64 tx_total_len; /* Total Tx data length (if send data) */ 694 unsigned long user_call_ID; /* User's call ID */ 695 struct { 696 u32 hard; /* Maximum lifetime (sec) */ 697 u32 idle; /* Max time since last data packet (msec) */ 698 u32 normal; /* Max time since last call packet (msec) */ 699 } timeouts; 700 u8 nr_timeouts; /* Number of timeouts specified */ 701 }; 702 703 struct rxrpc_send_params { 704 struct rxrpc_call_params call; 705 u32 abort_code; /* Abort code to Tx (if abort) */ 706 enum rxrpc_command command : 8; /* The command to implement */ 707 bool exclusive; /* Shared or exclusive call */ 708 bool upgrade; /* If the connection is upgradeable */ 709 }; 710 711 #include <trace/events/rxrpc.h> 712 713 /* 714 * af_rxrpc.c 715 */ 716 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 717 extern struct workqueue_struct *rxrpc_workqueue; 718 719 /* 720 * call_accept.c 721 */ 722 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 723 void rxrpc_discard_prealloc(struct rxrpc_sock *); 724 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 725 struct rxrpc_sock *, 726 struct sk_buff *); 727 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 728 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 729 rxrpc_notify_rx_t); 730 int rxrpc_reject_call(struct rxrpc_sock *); 731 732 /* 733 * call_event.c 734 */ 735 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 736 enum rxrpc_propose_ack_trace); 737 void rxrpc_process_call(struct work_struct *); 738 739 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 740 unsigned long expire_at, 741 unsigned long now, 742 enum rxrpc_timer_trace why) 743 { 744 trace_rxrpc_timer(call, why, now); 745 timer_reduce(&call->timer, expire_at); 746 } 747 748 /* 749 * call_object.c 750 */ 751 extern const char *const rxrpc_call_states[]; 752 extern const char *const rxrpc_call_completions[]; 753 extern unsigned int rxrpc_max_call_lifetime; 754 extern struct kmem_cache *rxrpc_call_jar; 755 756 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 757 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 758 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 759 struct rxrpc_conn_parameters *, 760 struct sockaddr_rxrpc *, 761 struct rxrpc_call_params *, gfp_t, 762 unsigned int); 763 int rxrpc_retry_client_call(struct rxrpc_sock *, 764 struct rxrpc_call *, 765 struct rxrpc_conn_parameters *, 766 struct sockaddr_rxrpc *, 767 gfp_t); 768 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 769 struct sk_buff *); 770 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 771 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 772 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 773 bool __rxrpc_queue_call(struct rxrpc_call *); 774 bool rxrpc_queue_call(struct rxrpc_call *); 775 void rxrpc_see_call(struct rxrpc_call *); 776 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 777 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 778 void rxrpc_cleanup_call(struct rxrpc_call *); 779 void rxrpc_destroy_all_calls(struct rxrpc_net *); 780 781 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 782 { 783 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 784 } 785 786 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 787 { 788 return !rxrpc_is_service_call(call); 789 } 790 791 /* 792 * Transition a call to the complete state. 793 */ 794 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 795 enum rxrpc_call_completion compl, 796 u32 abort_code, 797 int error) 798 { 799 if (call->state < RXRPC_CALL_COMPLETE) { 800 call->abort_code = abort_code; 801 call->error = error; 802 call->completion = compl, 803 call->state = RXRPC_CALL_COMPLETE; 804 trace_rxrpc_call_complete(call); 805 wake_up(&call->waitq); 806 return true; 807 } 808 return false; 809 } 810 811 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 812 enum rxrpc_call_completion compl, 813 u32 abort_code, 814 int error) 815 { 816 bool ret; 817 818 write_lock_bh(&call->state_lock); 819 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 820 write_unlock_bh(&call->state_lock); 821 return ret; 822 } 823 824 /* 825 * Record that a call successfully completed. 826 */ 827 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 828 { 829 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 830 } 831 832 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 833 { 834 bool ret; 835 836 write_lock_bh(&call->state_lock); 837 ret = __rxrpc_call_completed(call); 838 write_unlock_bh(&call->state_lock); 839 return ret; 840 } 841 842 /* 843 * Record that a call is locally aborted. 844 */ 845 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 846 rxrpc_seq_t seq, 847 u32 abort_code, int error) 848 { 849 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 850 abort_code, error); 851 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 852 abort_code, error); 853 } 854 855 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 856 rxrpc_seq_t seq, u32 abort_code, int error) 857 { 858 bool ret; 859 860 write_lock_bh(&call->state_lock); 861 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 862 write_unlock_bh(&call->state_lock); 863 return ret; 864 } 865 866 /* 867 * Abort a call due to a protocol error. 868 */ 869 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 870 struct sk_buff *skb, 871 const char *eproto_why, 872 const char *why, 873 u32 abort_code) 874 { 875 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 876 877 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 878 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 879 } 880 881 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 882 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 883 (abort_why), (abort_code)) 884 885 /* 886 * conn_client.c 887 */ 888 extern unsigned int rxrpc_max_client_connections; 889 extern unsigned int rxrpc_reap_client_connections; 890 extern unsigned long rxrpc_conn_idle_client_expiry; 891 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 892 extern struct idr rxrpc_client_conn_ids; 893 894 void rxrpc_destroy_client_conn_ids(void); 895 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 896 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 897 gfp_t); 898 void rxrpc_expose_client_call(struct rxrpc_call *); 899 void rxrpc_disconnect_client_call(struct rxrpc_call *); 900 void rxrpc_put_client_conn(struct rxrpc_connection *); 901 void rxrpc_discard_expired_client_conns(struct work_struct *); 902 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 903 904 /* 905 * conn_event.c 906 */ 907 void rxrpc_process_connection(struct work_struct *); 908 909 /* 910 * conn_object.c 911 */ 912 extern unsigned int rxrpc_connection_expiry; 913 extern unsigned int rxrpc_closed_conn_expiry; 914 915 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 916 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 917 struct sk_buff *, 918 struct rxrpc_peer **); 919 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 920 void rxrpc_disconnect_call(struct rxrpc_call *); 921 void rxrpc_kill_connection(struct rxrpc_connection *); 922 bool rxrpc_queue_conn(struct rxrpc_connection *); 923 void rxrpc_see_connection(struct rxrpc_connection *); 924 void rxrpc_get_connection(struct rxrpc_connection *); 925 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 926 void rxrpc_put_service_conn(struct rxrpc_connection *); 927 void rxrpc_service_connection_reaper(struct work_struct *); 928 void rxrpc_destroy_all_connections(struct rxrpc_net *); 929 930 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 931 { 932 return conn->out_clientflag; 933 } 934 935 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 936 { 937 return !rxrpc_conn_is_client(conn); 938 } 939 940 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 941 { 942 if (!conn) 943 return; 944 945 if (rxrpc_conn_is_client(conn)) 946 rxrpc_put_client_conn(conn); 947 else 948 rxrpc_put_service_conn(conn); 949 } 950 951 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 952 unsigned long expire_at) 953 { 954 timer_reduce(&conn->timer, expire_at); 955 } 956 957 /* 958 * conn_service.c 959 */ 960 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 961 struct sk_buff *); 962 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 963 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 964 struct rxrpc_connection *, struct sk_buff *); 965 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 966 967 /* 968 * input.c 969 */ 970 int rxrpc_input_packet(struct sock *, struct sk_buff *); 971 972 /* 973 * insecure.c 974 */ 975 extern const struct rxrpc_security rxrpc_no_security; 976 977 /* 978 * key.c 979 */ 980 extern struct key_type key_type_rxrpc; 981 extern struct key_type key_type_rxrpc_s; 982 983 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 984 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 985 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 986 u32); 987 988 /* 989 * local_event.c 990 */ 991 extern void rxrpc_process_local_events(struct rxrpc_local *); 992 993 /* 994 * local_object.c 995 */ 996 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 997 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 998 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 999 void rxrpc_put_local(struct rxrpc_local *); 1000 void rxrpc_queue_local(struct rxrpc_local *); 1001 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1002 1003 /* 1004 * misc.c 1005 */ 1006 extern unsigned int rxrpc_max_backlog __read_mostly; 1007 extern unsigned long rxrpc_requested_ack_delay; 1008 extern unsigned long rxrpc_soft_ack_delay; 1009 extern unsigned long rxrpc_idle_ack_delay; 1010 extern unsigned int rxrpc_rx_window_size; 1011 extern unsigned int rxrpc_rx_mtu; 1012 extern unsigned int rxrpc_rx_jumbo_max; 1013 extern unsigned long rxrpc_resend_timeout; 1014 1015 extern const s8 rxrpc_ack_priority[]; 1016 1017 /* 1018 * net_ns.c 1019 */ 1020 extern unsigned int rxrpc_net_id; 1021 extern struct pernet_operations rxrpc_net_ops; 1022 1023 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1024 { 1025 return net_generic(net, rxrpc_net_id); 1026 } 1027 1028 /* 1029 * output.c 1030 */ 1031 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1032 int rxrpc_send_abort_packet(struct rxrpc_call *); 1033 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1034 void rxrpc_reject_packets(struct rxrpc_local *); 1035 void rxrpc_send_keepalive(struct rxrpc_peer *); 1036 1037 /* 1038 * peer_event.c 1039 */ 1040 void rxrpc_error_report(struct sock *); 1041 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1042 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1043 void rxrpc_peer_keepalive_worker(struct work_struct *); 1044 1045 /* 1046 * peer_object.c 1047 */ 1048 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1049 const struct sockaddr_rxrpc *); 1050 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1051 struct sockaddr_rxrpc *, gfp_t); 1052 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1053 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1054 struct rxrpc_peer *); 1055 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1056 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1057 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1058 void rxrpc_put_peer(struct rxrpc_peer *); 1059 1060 /* 1061 * proc.c 1062 */ 1063 extern const struct seq_operations rxrpc_call_seq_ops; 1064 extern const struct seq_operations rxrpc_connection_seq_ops; 1065 extern const struct seq_operations rxrpc_peer_seq_ops; 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_purge_queue(struct sk_buff_head *); 1103 1104 /* 1105 * sysctl.c 1106 */ 1107 #ifdef CONFIG_SYSCTL 1108 extern int __init rxrpc_sysctl_init(void); 1109 extern void rxrpc_sysctl_exit(void); 1110 #else 1111 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1112 static inline void rxrpc_sysctl_exit(void) {} 1113 #endif 1114 1115 /* 1116 * utils.c 1117 */ 1118 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1119 1120 static inline bool before(u32 seq1, u32 seq2) 1121 { 1122 return (s32)(seq1 - seq2) < 0; 1123 } 1124 static inline bool before_eq(u32 seq1, u32 seq2) 1125 { 1126 return (s32)(seq1 - seq2) <= 0; 1127 } 1128 static inline bool after(u32 seq1, u32 seq2) 1129 { 1130 return (s32)(seq1 - seq2) > 0; 1131 } 1132 static inline bool after_eq(u32 seq1, u32 seq2) 1133 { 1134 return (s32)(seq1 - seq2) >= 0; 1135 } 1136 1137 /* 1138 * debug tracing 1139 */ 1140 extern unsigned int rxrpc_debug; 1141 1142 #define dbgprintk(FMT,...) \ 1143 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1144 1145 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1146 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1147 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1148 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1149 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1150 1151 1152 #if defined(__KDEBUG) 1153 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1154 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1155 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1156 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1157 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1158 1159 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1160 #define RXRPC_DEBUG_KENTER 0x01 1161 #define RXRPC_DEBUG_KLEAVE 0x02 1162 #define RXRPC_DEBUG_KDEBUG 0x04 1163 #define RXRPC_DEBUG_KPROTO 0x08 1164 #define RXRPC_DEBUG_KNET 0x10 1165 1166 #define _enter(FMT,...) \ 1167 do { \ 1168 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1169 kenter(FMT,##__VA_ARGS__); \ 1170 } while (0) 1171 1172 #define _leave(FMT,...) \ 1173 do { \ 1174 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1175 kleave(FMT,##__VA_ARGS__); \ 1176 } while (0) 1177 1178 #define _debug(FMT,...) \ 1179 do { \ 1180 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1181 kdebug(FMT,##__VA_ARGS__); \ 1182 } while (0) 1183 1184 #define _proto(FMT,...) \ 1185 do { \ 1186 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1187 kproto(FMT,##__VA_ARGS__); \ 1188 } while (0) 1189 1190 #define _net(FMT,...) \ 1191 do { \ 1192 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1193 knet(FMT,##__VA_ARGS__); \ 1194 } while (0) 1195 1196 #else 1197 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1198 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1199 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1200 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1201 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1202 #endif 1203 1204 /* 1205 * debug assertion checking 1206 */ 1207 #if 1 // defined(__KDEBUGALL) 1208 1209 #define ASSERT(X) \ 1210 do { \ 1211 if (unlikely(!(X))) { \ 1212 pr_err("Assertion failed\n"); \ 1213 BUG(); \ 1214 } \ 1215 } while (0) 1216 1217 #define ASSERTCMP(X, OP, Y) \ 1218 do { \ 1219 __typeof__(X) _x = (X); \ 1220 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1221 if (unlikely(!(_x OP _y))) { \ 1222 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1223 (unsigned long)_x, (unsigned long)_x, #OP, \ 1224 (unsigned long)_y, (unsigned long)_y); \ 1225 BUG(); \ 1226 } \ 1227 } while (0) 1228 1229 #define ASSERTIF(C, X) \ 1230 do { \ 1231 if (unlikely((C) && !(X))) { \ 1232 pr_err("Assertion failed\n"); \ 1233 BUG(); \ 1234 } \ 1235 } while (0) 1236 1237 #define ASSERTIFCMP(C, X, OP, Y) \ 1238 do { \ 1239 __typeof__(X) _x = (X); \ 1240 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1241 if (unlikely((C) && !(_x OP _y))) { \ 1242 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1243 (unsigned long)_x, (unsigned long)_x, #OP, \ 1244 (unsigned long)_y, (unsigned long)_y); \ 1245 BUG(); \ 1246 } \ 1247 } while (0) 1248 1249 #else 1250 1251 #define ASSERT(X) \ 1252 do { \ 1253 } while (0) 1254 1255 #define ASSERTCMP(X, OP, Y) \ 1256 do { \ 1257 } while (0) 1258 1259 #define ASSERTIF(C, X) \ 1260 do { \ 1261 } while (0) 1262 1263 #define ASSERTIFCMP(C, X, OP, Y) \ 1264 do { \ 1265 } while (0) 1266 1267 #endif /* __KDEBUGALL */ 1268