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 ktime_t rtt_last_req; /* Time of last RTT request */ 306 u64 rtt; /* Current RTT estimate (in nS) */ 307 u64 rtt_sum; /* Sum of cache contents */ 308 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 309 u8 rtt_cursor; /* next entry at which to insert */ 310 u8 rtt_usage; /* amount of cache actually used */ 311 312 u8 cong_cwnd; /* Congestion window size */ 313 }; 314 315 /* 316 * Keys for matching a connection. 317 */ 318 struct rxrpc_conn_proto { 319 union { 320 struct { 321 u32 epoch; /* epoch of this connection */ 322 u32 cid; /* connection ID */ 323 }; 324 u64 index_key; 325 }; 326 }; 327 328 struct rxrpc_conn_parameters { 329 struct rxrpc_local *local; /* Representation of local endpoint */ 330 struct rxrpc_peer *peer; /* Remote endpoint */ 331 struct key *key; /* Security details */ 332 bool exclusive; /* T if conn is exclusive */ 333 bool upgrade; /* T if service ID can be upgraded */ 334 u16 service_id; /* Service ID for this connection */ 335 u32 security_level; /* Security level selected */ 336 }; 337 338 /* 339 * Bits in the connection flags. 340 */ 341 enum rxrpc_conn_flag { 342 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 343 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 344 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 345 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 346 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 347 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 348 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 349 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 350 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 351 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 352 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 353 }; 354 355 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 356 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 357 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 358 (1UL << RXRPC_CONN_FINAL_ACK_3)) 359 360 /* 361 * Events that can be raised upon a connection. 362 */ 363 enum rxrpc_conn_event { 364 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 365 }; 366 367 /* 368 * The connection cache state. 369 */ 370 enum rxrpc_conn_cache_state { 371 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 372 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 373 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 374 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 375 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 376 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 377 RXRPC_CONN__NR_CACHE_STATES 378 }; 379 380 /* 381 * The connection protocol state. 382 */ 383 enum rxrpc_conn_proto_state { 384 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 385 RXRPC_CONN_CLIENT, /* Client connection */ 386 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 387 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 388 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 389 RXRPC_CONN_SERVICE, /* Service secured connection */ 390 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 391 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 392 RXRPC_CONN__NR_STATES 393 }; 394 395 /* 396 * RxRPC connection definition 397 * - matched by { local, peer, epoch, conn_id, direction } 398 * - each connection can only handle four simultaneous calls 399 */ 400 struct rxrpc_connection { 401 struct rxrpc_conn_proto proto; 402 struct rxrpc_conn_parameters params; 403 404 atomic_t usage; 405 struct rcu_head rcu; 406 struct list_head cache_link; 407 408 spinlock_t channel_lock; 409 unsigned char active_chans; /* Mask of active channels */ 410 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 411 struct list_head waiting_calls; /* Calls waiting for channels */ 412 struct rxrpc_channel { 413 unsigned long final_ack_at; /* Time at which to issue final ACK */ 414 struct rxrpc_call __rcu *call; /* Active call */ 415 unsigned int call_debug_id; /* call->debug_id */ 416 u32 call_id; /* ID of current call */ 417 u32 call_counter; /* Call ID counter */ 418 u32 last_call; /* ID of last call */ 419 u8 last_type; /* Type of last packet */ 420 union { 421 u32 last_seq; 422 u32 last_abort; 423 }; 424 } channels[RXRPC_MAXCALLS]; 425 426 struct timer_list timer; /* Conn event timer */ 427 struct work_struct processor; /* connection event processor */ 428 union { 429 struct rb_node client_node; /* Node in local->client_conns */ 430 struct rb_node service_node; /* Node in peer->service_conns */ 431 }; 432 struct list_head proc_link; /* link in procfs list */ 433 struct list_head link; /* link in master connection list */ 434 struct sk_buff_head rx_queue; /* received conn-level packets */ 435 const struct rxrpc_security *security; /* applied security module */ 436 struct key *server_key; /* security for this service */ 437 struct crypto_skcipher *cipher; /* encryption handle */ 438 struct rxrpc_crypt csum_iv; /* packet checksum base */ 439 unsigned long flags; 440 unsigned long events; 441 unsigned long idle_timestamp; /* Time at which last became idle */ 442 spinlock_t state_lock; /* state-change lock */ 443 enum rxrpc_conn_cache_state cache_state; 444 enum rxrpc_conn_proto_state state; /* current state of connection */ 445 u32 local_abort; /* local abort code */ 446 u32 remote_abort; /* remote abort code */ 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 u16 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 }; 457 458 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 459 { 460 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 461 } 462 463 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 464 { 465 return !rxrpc_to_server(sp); 466 } 467 468 /* 469 * Flags in call->flags. 470 */ 471 enum rxrpc_call_flag { 472 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 473 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 474 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 475 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 476 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 477 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 478 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 479 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 480 RXRPC_CALL_PINGING, /* Ping in process */ 481 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 482 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 483 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 484 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 485 }; 486 487 /* 488 * Events that can be raised on a call. 489 */ 490 enum rxrpc_call_event { 491 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 492 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 493 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 494 RXRPC_CALL_EV_PING, /* Ping send required */ 495 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 496 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 497 }; 498 499 /* 500 * The states that a call can be in. 501 */ 502 enum rxrpc_call_state { 503 RXRPC_CALL_UNINITIALISED, 504 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 505 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 506 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 507 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 508 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 509 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 510 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 511 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 512 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 513 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 514 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 515 RXRPC_CALL_COMPLETE, /* - call complete */ 516 NR__RXRPC_CALL_STATES 517 }; 518 519 /* 520 * Call Tx congestion management modes. 521 */ 522 enum rxrpc_congest_mode { 523 RXRPC_CALL_SLOW_START, 524 RXRPC_CALL_CONGEST_AVOIDANCE, 525 RXRPC_CALL_PACKET_LOSS, 526 RXRPC_CALL_FAST_RETRANSMIT, 527 NR__RXRPC_CONGEST_MODES 528 }; 529 530 /* 531 * RxRPC call definition 532 * - matched by { connection, call_id } 533 */ 534 struct rxrpc_call { 535 struct rcu_head rcu; 536 struct rxrpc_connection *conn; /* connection carrying call */ 537 struct rxrpc_peer *peer; /* Peer record for remote address */ 538 struct rxrpc_sock __rcu *socket; /* socket responsible */ 539 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 540 struct mutex user_mutex; /* User access mutex */ 541 unsigned long ack_at; /* When deferred ACK needs to happen */ 542 unsigned long ack_lost_at; /* When ACK is figured as lost */ 543 unsigned long resend_at; /* When next resend needs to happen */ 544 unsigned long ping_at; /* When next to send a ping */ 545 unsigned long keepalive_at; /* When next to send a keepalive ping */ 546 unsigned long expect_rx_by; /* When we expect to get a packet by */ 547 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 548 unsigned long expect_term_by; /* When we expect call termination by */ 549 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 550 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 551 struct timer_list timer; /* Combined event timer */ 552 struct work_struct processor; /* Event processor */ 553 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 554 struct list_head link; /* link in master call list */ 555 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 556 struct hlist_node error_link; /* link in error distribution list */ 557 struct list_head accept_link; /* Link in rx->acceptq */ 558 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 559 struct list_head sock_link; /* Link in rx->sock_calls */ 560 struct rb_node sock_node; /* Node in rx->calls */ 561 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 562 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 563 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 564 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 565 unsigned long user_call_ID; /* user-defined call ID */ 566 unsigned long flags; 567 unsigned long events; 568 spinlock_t lock; 569 spinlock_t notify_lock; /* Kernel notification lock */ 570 rwlock_t state_lock; /* lock for state transition */ 571 u32 abort_code; /* Local/remote abort code */ 572 int error; /* Local error incurred */ 573 enum rxrpc_call_state state; /* current state of call */ 574 enum rxrpc_call_completion completion; /* Call completion condition */ 575 atomic_t usage; 576 u16 service_id; /* service ID */ 577 u8 security_ix; /* Security type */ 578 u32 call_id; /* call ID on connection */ 579 u32 cid; /* connection ID plus channel index */ 580 int debug_id; /* debug ID for printks */ 581 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 582 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 583 584 /* Rx/Tx circular buffer, depending on phase. 585 * 586 * In the Rx phase, packets are annotated with 0 or the number of the 587 * segment of a jumbo packet each buffer refers to. There can be up to 588 * 47 segments in a maximum-size UDP packet. 589 * 590 * In the Tx phase, packets are annotated with which buffers have been 591 * acked. 592 */ 593 #define RXRPC_RXTX_BUFF_SIZE 64 594 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 595 #define RXRPC_INIT_RX_WINDOW_SIZE 63 596 struct sk_buff **rxtx_buffer; 597 u8 *rxtx_annotations; 598 #define RXRPC_TX_ANNO_ACK 0 599 #define RXRPC_TX_ANNO_UNACK 1 600 #define RXRPC_TX_ANNO_NAK 2 601 #define RXRPC_TX_ANNO_RETRANS 3 602 #define RXRPC_TX_ANNO_MASK 0x03 603 #define RXRPC_TX_ANNO_LAST 0x04 604 #define RXRPC_TX_ANNO_RESENT 0x08 605 606 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 607 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 608 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 609 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 610 * not hard-ACK'd packet follows this. 611 */ 612 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 613 614 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 615 * is fixed, we keep these numbers in terms of segments (ie. DATA 616 * packets) rather than bytes. 617 */ 618 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 619 u8 cong_cwnd; /* Congestion window size */ 620 u8 cong_extra; /* Extra to send for congestion management */ 621 u8 cong_ssthresh; /* Slow-start threshold */ 622 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 623 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 624 u8 cong_cumul_acks; /* Cumulative ACK count */ 625 ktime_t cong_tstamp; /* Last time cwnd was changed */ 626 627 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 628 * consumed packet follows this. 629 */ 630 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 631 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 632 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 633 u8 rx_winsize; /* Size of Rx window */ 634 u8 tx_winsize; /* Maximum size of Tx window */ 635 bool tx_phase; /* T if transmission phase, F if receive phase */ 636 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 637 638 /* receive-phase ACK management */ 639 u8 ackr_reason; /* reason to ACK */ 640 u16 ackr_skew; /* skew on packet being ACK'd */ 641 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 642 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 643 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 644 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 645 646 /* ping management */ 647 rxrpc_serial_t ping_serial; /* Last ping sent */ 648 ktime_t ping_time; /* Time last ping sent */ 649 650 /* transmission-phase ACK management */ 651 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 652 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 653 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 654 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 655 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 656 }; 657 658 /* 659 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 660 */ 661 struct rxrpc_ack_summary { 662 u8 ack_reason; 663 u8 nr_acks; /* Number of ACKs in packet */ 664 u8 nr_nacks; /* Number of NACKs in packet */ 665 u8 nr_new_acks; /* Number of new ACKs in packet */ 666 u8 nr_new_nacks; /* Number of new NACKs in packet */ 667 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 668 bool new_low_nack; /* T if new low NACK found */ 669 bool retrans_timeo; /* T if reTx due to timeout happened */ 670 u8 flight_size; /* Number of unreceived transmissions */ 671 /* Place to stash values for tracing */ 672 enum rxrpc_congest_mode mode:8; 673 u8 cwnd; 674 u8 ssthresh; 675 u8 dup_acks; 676 u8 cumulative_acks; 677 }; 678 679 /* 680 * sendmsg() cmsg-specified parameters. 681 */ 682 enum rxrpc_command { 683 RXRPC_CMD_SEND_DATA, /* send data message */ 684 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 685 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 686 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 687 }; 688 689 struct rxrpc_call_params { 690 s64 tx_total_len; /* Total Tx data length (if send data) */ 691 unsigned long user_call_ID; /* User's call ID */ 692 struct { 693 u32 hard; /* Maximum lifetime (sec) */ 694 u32 idle; /* Max time since last data packet (msec) */ 695 u32 normal; /* Max time since last call packet (msec) */ 696 } timeouts; 697 u8 nr_timeouts; /* Number of timeouts specified */ 698 }; 699 700 struct rxrpc_send_params { 701 struct rxrpc_call_params call; 702 u32 abort_code; /* Abort code to Tx (if abort) */ 703 enum rxrpc_command command : 8; /* The command to implement */ 704 bool exclusive; /* Shared or exclusive call */ 705 bool upgrade; /* If the connection is upgradeable */ 706 }; 707 708 #include <trace/events/rxrpc.h> 709 710 /* 711 * af_rxrpc.c 712 */ 713 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 714 extern struct workqueue_struct *rxrpc_workqueue; 715 716 /* 717 * call_accept.c 718 */ 719 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 720 void rxrpc_discard_prealloc(struct rxrpc_sock *); 721 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 722 struct rxrpc_sock *, 723 struct rxrpc_peer *, 724 struct rxrpc_connection *, 725 struct sk_buff *); 726 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 727 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 728 rxrpc_notify_rx_t); 729 int rxrpc_reject_call(struct rxrpc_sock *); 730 731 /* 732 * call_event.c 733 */ 734 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 735 enum rxrpc_propose_ack_trace); 736 void rxrpc_process_call(struct work_struct *); 737 738 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 739 unsigned long expire_at, 740 unsigned long now, 741 enum rxrpc_timer_trace why) 742 { 743 trace_rxrpc_timer(call, why, now); 744 timer_reduce(&call->timer, expire_at); 745 } 746 747 /* 748 * call_object.c 749 */ 750 extern const char *const rxrpc_call_states[]; 751 extern const char *const rxrpc_call_completions[]; 752 extern unsigned int rxrpc_max_call_lifetime; 753 extern struct kmem_cache *rxrpc_call_jar; 754 755 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 756 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 757 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 758 struct rxrpc_conn_parameters *, 759 struct sockaddr_rxrpc *, 760 struct rxrpc_call_params *, gfp_t, 761 unsigned int); 762 int rxrpc_retry_client_call(struct rxrpc_sock *, 763 struct rxrpc_call *, 764 struct rxrpc_conn_parameters *, 765 struct sockaddr_rxrpc *, 766 gfp_t); 767 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 768 struct sk_buff *); 769 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 770 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 771 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 772 bool __rxrpc_queue_call(struct rxrpc_call *); 773 bool rxrpc_queue_call(struct rxrpc_call *); 774 void rxrpc_see_call(struct rxrpc_call *); 775 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 776 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 777 void rxrpc_cleanup_call(struct rxrpc_call *); 778 void rxrpc_destroy_all_calls(struct rxrpc_net *); 779 780 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 781 { 782 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 783 } 784 785 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 786 { 787 return !rxrpc_is_service_call(call); 788 } 789 790 /* 791 * Transition a call to the complete state. 792 */ 793 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 794 enum rxrpc_call_completion compl, 795 u32 abort_code, 796 int error) 797 { 798 if (call->state < RXRPC_CALL_COMPLETE) { 799 call->abort_code = abort_code; 800 call->error = error; 801 call->completion = compl, 802 call->state = RXRPC_CALL_COMPLETE; 803 trace_rxrpc_call_complete(call); 804 wake_up(&call->waitq); 805 return true; 806 } 807 return false; 808 } 809 810 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 811 enum rxrpc_call_completion compl, 812 u32 abort_code, 813 int error) 814 { 815 bool ret; 816 817 write_lock_bh(&call->state_lock); 818 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 819 write_unlock_bh(&call->state_lock); 820 return ret; 821 } 822 823 /* 824 * Record that a call successfully completed. 825 */ 826 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 827 { 828 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 829 } 830 831 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 832 { 833 bool ret; 834 835 write_lock_bh(&call->state_lock); 836 ret = __rxrpc_call_completed(call); 837 write_unlock_bh(&call->state_lock); 838 return ret; 839 } 840 841 /* 842 * Record that a call is locally aborted. 843 */ 844 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 845 rxrpc_seq_t seq, 846 u32 abort_code, int error) 847 { 848 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 849 abort_code, error); 850 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 851 abort_code, error); 852 } 853 854 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 855 rxrpc_seq_t seq, u32 abort_code, int error) 856 { 857 bool ret; 858 859 write_lock_bh(&call->state_lock); 860 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 861 write_unlock_bh(&call->state_lock); 862 return ret; 863 } 864 865 /* 866 * Abort a call due to a protocol error. 867 */ 868 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 869 struct sk_buff *skb, 870 const char *eproto_why, 871 const char *why, 872 u32 abort_code) 873 { 874 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 875 876 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 877 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 878 } 879 880 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 881 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 882 (abort_why), (abort_code)) 883 884 /* 885 * conn_client.c 886 */ 887 extern unsigned int rxrpc_max_client_connections; 888 extern unsigned int rxrpc_reap_client_connections; 889 extern unsigned long rxrpc_conn_idle_client_expiry; 890 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 891 extern struct idr rxrpc_client_conn_ids; 892 893 void rxrpc_destroy_client_conn_ids(void); 894 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 895 struct sockaddr_rxrpc *, gfp_t); 896 void rxrpc_expose_client_call(struct rxrpc_call *); 897 void rxrpc_disconnect_client_call(struct rxrpc_call *); 898 void rxrpc_put_client_conn(struct rxrpc_connection *); 899 void rxrpc_discard_expired_client_conns(struct work_struct *); 900 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 901 902 /* 903 * conn_event.c 904 */ 905 void rxrpc_process_connection(struct work_struct *); 906 907 /* 908 * conn_object.c 909 */ 910 extern unsigned int rxrpc_connection_expiry; 911 extern unsigned int rxrpc_closed_conn_expiry; 912 913 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 914 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 915 struct sk_buff *, 916 struct rxrpc_peer **); 917 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 918 void rxrpc_disconnect_call(struct rxrpc_call *); 919 void rxrpc_kill_connection(struct rxrpc_connection *); 920 bool rxrpc_queue_conn(struct rxrpc_connection *); 921 void rxrpc_see_connection(struct rxrpc_connection *); 922 void rxrpc_get_connection(struct rxrpc_connection *); 923 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 924 void rxrpc_put_service_conn(struct rxrpc_connection *); 925 void rxrpc_service_connection_reaper(struct work_struct *); 926 void rxrpc_destroy_all_connections(struct rxrpc_net *); 927 928 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 929 { 930 return conn->out_clientflag; 931 } 932 933 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 934 { 935 return !rxrpc_conn_is_client(conn); 936 } 937 938 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 939 { 940 if (!conn) 941 return; 942 943 if (rxrpc_conn_is_client(conn)) 944 rxrpc_put_client_conn(conn); 945 else 946 rxrpc_put_service_conn(conn); 947 } 948 949 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 950 unsigned long expire_at) 951 { 952 timer_reduce(&conn->timer, expire_at); 953 } 954 955 /* 956 * conn_service.c 957 */ 958 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 959 struct sk_buff *); 960 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 961 void rxrpc_new_incoming_connection(struct rxrpc_sock *, 962 struct rxrpc_connection *, struct sk_buff *); 963 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 964 965 /* 966 * input.c 967 */ 968 void rxrpc_data_ready(struct sock *); 969 970 /* 971 * insecure.c 972 */ 973 extern const struct rxrpc_security rxrpc_no_security; 974 975 /* 976 * key.c 977 */ 978 extern struct key_type key_type_rxrpc; 979 extern struct key_type key_type_rxrpc_s; 980 981 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 982 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 983 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 984 u32); 985 986 /* 987 * local_event.c 988 */ 989 extern void rxrpc_process_local_events(struct rxrpc_local *); 990 991 /* 992 * local_object.c 993 */ 994 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 995 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 996 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 997 void rxrpc_put_local(struct rxrpc_local *); 998 void rxrpc_queue_local(struct rxrpc_local *); 999 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1000 1001 /* 1002 * misc.c 1003 */ 1004 extern unsigned int rxrpc_max_backlog __read_mostly; 1005 extern unsigned long rxrpc_requested_ack_delay; 1006 extern unsigned long rxrpc_soft_ack_delay; 1007 extern unsigned long rxrpc_idle_ack_delay; 1008 extern unsigned int rxrpc_rx_window_size; 1009 extern unsigned int rxrpc_rx_mtu; 1010 extern unsigned int rxrpc_rx_jumbo_max; 1011 extern unsigned long rxrpc_resend_timeout; 1012 1013 extern const s8 rxrpc_ack_priority[]; 1014 1015 /* 1016 * net_ns.c 1017 */ 1018 extern unsigned int rxrpc_net_id; 1019 extern struct pernet_operations rxrpc_net_ops; 1020 1021 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1022 { 1023 return net_generic(net, rxrpc_net_id); 1024 } 1025 1026 /* 1027 * output.c 1028 */ 1029 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1030 int rxrpc_send_abort_packet(struct rxrpc_call *); 1031 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1032 void rxrpc_reject_packets(struct rxrpc_local *); 1033 void rxrpc_send_keepalive(struct rxrpc_peer *); 1034 1035 /* 1036 * peer_event.c 1037 */ 1038 void rxrpc_error_report(struct sock *); 1039 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1040 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1041 void rxrpc_peer_keepalive_worker(struct work_struct *); 1042 1043 /* 1044 * peer_object.c 1045 */ 1046 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1047 const struct sockaddr_rxrpc *); 1048 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1049 struct sockaddr_rxrpc *, gfp_t); 1050 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1051 void rxrpc_new_incoming_peer(struct rxrpc_local *, struct rxrpc_peer *); 1052 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1053 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1054 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1055 void rxrpc_put_peer(struct rxrpc_peer *); 1056 1057 /* 1058 * proc.c 1059 */ 1060 extern const struct seq_operations rxrpc_call_seq_ops; 1061 extern const struct seq_operations rxrpc_connection_seq_ops; 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