1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* AF_RXRPC internal definitions 3 * 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/atomic.h> 9 #include <linux/seqlock.h> 10 #include <net/net_namespace.h> 11 #include <net/netns/generic.h> 12 #include <net/sock.h> 13 #include <net/af_rxrpc.h> 14 #include "protocol.h" 15 16 #if 0 17 #define CHECK_SLAB_OKAY(X) \ 18 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 19 (POISON_FREE << 8 | POISON_FREE)) 20 #else 21 #define CHECK_SLAB_OKAY(X) do {} while (0) 22 #endif 23 24 #define FCRYPT_BSIZE 8 25 struct rxrpc_crypt { 26 union { 27 u8 x[FCRYPT_BSIZE]; 28 __be32 n[2]; 29 }; 30 } __attribute__((aligned(8))); 31 32 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 33 #define rxrpc_queue_delayed_work(WS,D) \ 34 queue_delayed_work(rxrpc_workqueue, (WS), (D)) 35 36 struct rxrpc_connection; 37 38 /* 39 * Mark applied to socket buffers in skb->mark. skb->priority is used 40 * to pass supplementary information. 41 */ 42 enum rxrpc_skb_mark { 43 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 44 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 45 }; 46 47 /* 48 * sk_state for RxRPC sockets 49 */ 50 enum { 51 RXRPC_UNBOUND = 0, 52 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 53 RXRPC_CLIENT_BOUND, /* client local address bound */ 54 RXRPC_SERVER_BOUND, /* server local address bound */ 55 RXRPC_SERVER_BOUND2, /* second server local address bound */ 56 RXRPC_SERVER_LISTENING, /* server listening for connections */ 57 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 58 RXRPC_CLOSE, /* socket is being closed */ 59 }; 60 61 /* 62 * Per-network namespace data. 63 */ 64 struct rxrpc_net { 65 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 66 u32 epoch; /* Local epoch for detecting local-end reset */ 67 struct list_head calls; /* List of calls active in this namespace */ 68 rwlock_t call_lock; /* Lock for ->calls */ 69 atomic_t nr_calls; /* Count of allocated calls */ 70 71 atomic_t nr_conns; 72 struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 73 struct list_head service_conns; /* Service conns in this namespace */ 74 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 75 struct work_struct service_conn_reaper; 76 struct timer_list service_conn_reap_timer; 77 78 unsigned int nr_client_conns; 79 unsigned int nr_active_client_conns; 80 bool kill_all_client_conns; 81 bool live; 82 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 83 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 84 struct list_head waiting_client_conns; 85 struct list_head active_client_conns; 86 struct list_head idle_client_conns; 87 struct work_struct client_conn_reaper; 88 struct timer_list client_conn_reap_timer; 89 90 struct list_head local_endpoints; 91 struct mutex local_mutex; /* Lock for ->local_endpoints */ 92 93 DECLARE_HASHTABLE (peer_hash, 10); 94 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 95 96 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 97 u8 peer_keepalive_cursor; 98 time64_t peer_keepalive_base; 99 struct list_head peer_keepalive[32]; 100 struct list_head peer_keepalive_new; 101 struct timer_list peer_keepalive_timer; 102 struct work_struct peer_keepalive_work; 103 }; 104 105 /* 106 * Service backlog preallocation. 107 * 108 * This contains circular buffers of preallocated peers, connections and calls 109 * for incoming service calls and their head and tail pointers. This allows 110 * calls to be set up in the data_ready handler, thereby avoiding the need to 111 * shuffle packets around so much. 112 */ 113 struct rxrpc_backlog { 114 unsigned short peer_backlog_head; 115 unsigned short peer_backlog_tail; 116 unsigned short conn_backlog_head; 117 unsigned short conn_backlog_tail; 118 unsigned short call_backlog_head; 119 unsigned short call_backlog_tail; 120 #define RXRPC_BACKLOG_MAX 32 121 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 122 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 123 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 124 }; 125 126 /* 127 * RxRPC socket definition 128 */ 129 struct rxrpc_sock { 130 /* WARNING: sk has to be the first member */ 131 struct sock sk; 132 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 133 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 134 struct rxrpc_local *local; /* local endpoint */ 135 struct rxrpc_backlog *backlog; /* Preallocation for services */ 136 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 137 struct list_head sock_calls; /* List of calls owned by this socket */ 138 struct list_head to_be_accepted; /* calls awaiting acceptance */ 139 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 140 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 141 struct key *key; /* security for this socket */ 142 struct key *securities; /* list of server security descriptors */ 143 struct rb_root calls; /* User ID -> call mapping */ 144 unsigned long flags; 145 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 146 rwlock_t call_lock; /* lock for calls */ 147 u32 min_sec_level; /* minimum security level */ 148 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 149 bool exclusive; /* Exclusive connection for a client socket */ 150 u16 second_service; /* Additional service bound to the endpoint */ 151 struct { 152 /* Service upgrade information */ 153 u16 from; /* Service ID to upgrade (if not 0) */ 154 u16 to; /* service ID to upgrade to */ 155 } service_upgrade; 156 sa_family_t family; /* Protocol family created with */ 157 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 158 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 159 }; 160 161 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 162 163 /* 164 * CPU-byteorder normalised Rx packet header. 165 */ 166 struct rxrpc_host_header { 167 u32 epoch; /* client boot timestamp */ 168 u32 cid; /* connection and channel ID */ 169 u32 callNumber; /* call ID (0 for connection-level packets) */ 170 u32 seq; /* sequence number of pkt in call stream */ 171 u32 serial; /* serial number of pkt sent to network */ 172 u8 type; /* packet type */ 173 u8 flags; /* packet flags */ 174 u8 userStatus; /* app-layer defined status */ 175 u8 securityIndex; /* security protocol ID */ 176 union { 177 u16 _rsvd; /* reserved */ 178 u16 cksum; /* kerberos security checksum */ 179 }; 180 u16 serviceId; /* service ID */ 181 } __packed; 182 183 /* 184 * RxRPC socket buffer private variables 185 * - max 48 bytes (struct sk_buff::cb) 186 */ 187 struct rxrpc_skb_priv { 188 atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 189 u8 nr_subpackets; /* Number of subpackets */ 190 u8 rx_flags; /* Received packet flags */ 191 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 192 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 193 union { 194 int remain; /* amount of space remaining for next write */ 195 196 /* List of requested ACKs on subpackets */ 197 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 198 BITS_PER_LONG]; 199 }; 200 201 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 202 }; 203 204 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 205 206 /* 207 * RxRPC security module interface 208 */ 209 struct rxrpc_security { 210 const char *name; /* name of this service */ 211 u8 security_index; /* security type provided */ 212 u32 no_key_abort; /* Abort code indicating no key */ 213 214 /* Initialise a security service */ 215 int (*init)(void); 216 217 /* Clean up a security service */ 218 void (*exit)(void); 219 220 /* initialise a connection's security */ 221 int (*init_connection_security)(struct rxrpc_connection *); 222 223 /* prime a connection's packet security */ 224 int (*prime_packet_security)(struct rxrpc_connection *); 225 226 /* impose security on a packet */ 227 int (*secure_packet)(struct rxrpc_call *, 228 struct sk_buff *, 229 size_t, 230 void *); 231 232 /* verify the security on a received packet */ 233 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 234 unsigned int, unsigned int, rxrpc_seq_t, u16); 235 236 /* Free crypto request on a call */ 237 void (*free_call_crypto)(struct rxrpc_call *); 238 239 /* Locate the data in a received packet that has been verified. */ 240 void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 241 unsigned int *, unsigned int *); 242 243 /* issue a challenge */ 244 int (*issue_challenge)(struct rxrpc_connection *); 245 246 /* respond to a challenge */ 247 int (*respond_to_challenge)(struct rxrpc_connection *, 248 struct sk_buff *, 249 u32 *); 250 251 /* verify a response */ 252 int (*verify_response)(struct rxrpc_connection *, 253 struct sk_buff *, 254 u32 *); 255 256 /* clear connection security */ 257 void (*clear)(struct rxrpc_connection *); 258 }; 259 260 /* 261 * RxRPC local transport endpoint description 262 * - owned by a single AF_RXRPC socket 263 * - pointed to by transport socket struct sk_user_data 264 */ 265 struct rxrpc_local { 266 struct rcu_head rcu; 267 atomic_t active_users; /* Number of users of the local endpoint */ 268 atomic_t usage; /* Number of references to the structure */ 269 struct rxrpc_net *rxnet; /* The network ns in which this resides */ 270 struct list_head link; 271 struct socket *socket; /* my UDP socket */ 272 struct work_struct processor; 273 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 274 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 275 struct sk_buff_head reject_queue; /* packets awaiting rejection */ 276 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 277 struct rb_root client_conns; /* Client connections by socket params */ 278 spinlock_t client_conns_lock; /* Lock for client_conns */ 279 spinlock_t lock; /* access lock */ 280 rwlock_t services_lock; /* lock for services list */ 281 int debug_id; /* debug ID for printks */ 282 bool dead; 283 bool service_closed; /* Service socket closed */ 284 struct sockaddr_rxrpc srx; /* local address */ 285 }; 286 287 /* 288 * RxRPC remote transport endpoint definition 289 * - matched by local endpoint, remote port, address and protocol type 290 */ 291 struct rxrpc_peer { 292 struct rcu_head rcu; /* This must be first */ 293 atomic_t usage; 294 unsigned long hash_key; 295 struct hlist_node hash_link; 296 struct rxrpc_local *local; 297 struct hlist_head error_targets; /* targets for net error distribution */ 298 struct rb_root service_conns; /* Service connections */ 299 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 300 time64_t last_tx_at; /* Last time packet sent here */ 301 seqlock_t service_conn_lock; 302 spinlock_t lock; /* access lock */ 303 unsigned int if_mtu; /* interface MTU for this peer */ 304 unsigned int mtu; /* network MTU for this peer */ 305 unsigned int maxdata; /* data size (MTU - hdrsize) */ 306 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 307 int debug_id; /* debug ID for printks */ 308 struct sockaddr_rxrpc srx; /* remote address */ 309 310 /* calculated RTT cache */ 311 #define RXRPC_RTT_CACHE_SIZE 32 312 spinlock_t rtt_input_lock; /* RTT lock for input routine */ 313 ktime_t rtt_last_req; /* Time of last RTT request */ 314 u64 rtt; /* Current RTT estimate (in nS) */ 315 u64 rtt_sum; /* Sum of cache contents */ 316 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 317 u8 rtt_cursor; /* next entry at which to insert */ 318 u8 rtt_usage; /* amount of cache actually used */ 319 320 u8 cong_cwnd; /* Congestion window size */ 321 }; 322 323 /* 324 * Keys for matching a connection. 325 */ 326 struct rxrpc_conn_proto { 327 union { 328 struct { 329 u32 epoch; /* epoch of this connection */ 330 u32 cid; /* connection ID */ 331 }; 332 u64 index_key; 333 }; 334 }; 335 336 struct rxrpc_conn_parameters { 337 struct rxrpc_local *local; /* Representation of local endpoint */ 338 struct rxrpc_peer *peer; /* Remote endpoint */ 339 struct key *key; /* Security details */ 340 bool exclusive; /* T if conn is exclusive */ 341 bool upgrade; /* T if service ID can be upgraded */ 342 u16 service_id; /* Service ID for this connection */ 343 u32 security_level; /* Security level selected */ 344 }; 345 346 /* 347 * Bits in the connection flags. 348 */ 349 enum rxrpc_conn_flag { 350 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 351 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 352 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 353 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 354 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 355 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 356 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 357 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 358 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 359 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 360 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 361 }; 362 363 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 364 (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 365 (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 366 (1UL << RXRPC_CONN_FINAL_ACK_3)) 367 368 /* 369 * Events that can be raised upon a connection. 370 */ 371 enum rxrpc_conn_event { 372 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 373 }; 374 375 /* 376 * The connection cache state. 377 */ 378 enum rxrpc_conn_cache_state { 379 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 380 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 381 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 382 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 383 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 384 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 385 RXRPC_CONN__NR_CACHE_STATES 386 }; 387 388 /* 389 * The connection protocol state. 390 */ 391 enum rxrpc_conn_proto_state { 392 RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 393 RXRPC_CONN_CLIENT, /* Client connection */ 394 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 395 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 396 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 397 RXRPC_CONN_SERVICE, /* Service secured connection */ 398 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 399 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 400 RXRPC_CONN__NR_STATES 401 }; 402 403 /* 404 * RxRPC connection definition 405 * - matched by { local, peer, epoch, conn_id, direction } 406 * - each connection can only handle four simultaneous calls 407 */ 408 struct rxrpc_connection { 409 struct rxrpc_conn_proto proto; 410 struct rxrpc_conn_parameters params; 411 412 atomic_t usage; 413 struct rcu_head rcu; 414 struct list_head cache_link; 415 416 spinlock_t channel_lock; 417 unsigned char active_chans; /* Mask of active channels */ 418 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 419 struct list_head waiting_calls; /* Calls waiting for channels */ 420 struct rxrpc_channel { 421 unsigned long final_ack_at; /* Time at which to issue final ACK */ 422 struct rxrpc_call __rcu *call; /* Active call */ 423 unsigned int call_debug_id; /* call->debug_id */ 424 u32 call_id; /* ID of current call */ 425 u32 call_counter; /* Call ID counter */ 426 u32 last_call; /* ID of last call */ 427 u8 last_type; /* Type of last packet */ 428 union { 429 u32 last_seq; 430 u32 last_abort; 431 }; 432 } channels[RXRPC_MAXCALLS]; 433 434 struct timer_list timer; /* Conn event timer */ 435 struct work_struct processor; /* connection event processor */ 436 union { 437 struct rb_node client_node; /* Node in local->client_conns */ 438 struct rb_node service_node; /* Node in peer->service_conns */ 439 }; 440 struct list_head proc_link; /* link in procfs list */ 441 struct list_head link; /* link in master connection list */ 442 struct sk_buff_head rx_queue; /* received conn-level packets */ 443 const struct rxrpc_security *security; /* applied security module */ 444 struct key *server_key; /* security for this service */ 445 struct crypto_sync_skcipher *cipher; /* encryption handle */ 446 struct rxrpc_crypt csum_iv; /* packet checksum base */ 447 unsigned long flags; 448 unsigned long events; 449 unsigned long idle_timestamp; /* Time at which last became idle */ 450 spinlock_t state_lock; /* state-change lock */ 451 enum rxrpc_conn_cache_state cache_state; 452 enum rxrpc_conn_proto_state state; /* current state of connection */ 453 u32 abort_code; /* Abort code of connection abort */ 454 int debug_id; /* debug ID for printks */ 455 atomic_t serial; /* packet serial number counter */ 456 unsigned int hi_serial; /* highest serial number received */ 457 u32 security_nonce; /* response re-use preventer */ 458 u32 service_id; /* Service ID, possibly upgraded */ 459 u8 size_align; /* data size alignment (for security) */ 460 u8 security_size; /* security header size */ 461 u8 security_ix; /* security type */ 462 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 463 short error; /* Local error code */ 464 }; 465 466 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 467 { 468 return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 469 } 470 471 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 472 { 473 return !rxrpc_to_server(sp); 474 } 475 476 /* 477 * Flags in call->flags. 478 */ 479 enum rxrpc_call_flag { 480 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 481 RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 482 RXRPC_CALL_IS_SERVICE, /* Call is service call */ 483 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 484 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 485 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 486 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 487 RXRPC_CALL_PINGING, /* Ping in process */ 488 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 489 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 490 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 491 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 492 RXRPC_CALL_IS_INTR, /* The call is interruptible */ 493 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 494 }; 495 496 /* 497 * Events that can be raised on a call. 498 */ 499 enum rxrpc_call_event { 500 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 501 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 502 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 503 RXRPC_CALL_EV_PING, /* Ping send required */ 504 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 505 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 506 }; 507 508 /* 509 * The states that a call can be in. 510 */ 511 enum rxrpc_call_state { 512 RXRPC_CALL_UNINITIALISED, 513 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 514 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 515 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 516 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 517 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 518 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 519 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 520 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 521 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 522 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 523 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 524 RXRPC_CALL_COMPLETE, /* - call complete */ 525 NR__RXRPC_CALL_STATES 526 }; 527 528 /* 529 * Call completion condition (state == RXRPC_CALL_COMPLETE). 530 */ 531 enum rxrpc_call_completion { 532 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 533 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 534 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 535 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 536 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 537 NR__RXRPC_CALL_COMPLETIONS 538 }; 539 540 /* 541 * Call Tx congestion management modes. 542 */ 543 enum rxrpc_congest_mode { 544 RXRPC_CALL_SLOW_START, 545 RXRPC_CALL_CONGEST_AVOIDANCE, 546 RXRPC_CALL_PACKET_LOSS, 547 RXRPC_CALL_FAST_RETRANSMIT, 548 NR__RXRPC_CONGEST_MODES 549 }; 550 551 /* 552 * RxRPC call definition 553 * - matched by { connection, call_id } 554 */ 555 struct rxrpc_call { 556 struct rcu_head rcu; 557 struct rxrpc_connection *conn; /* connection carrying call */ 558 struct rxrpc_peer *peer; /* Peer record for remote address */ 559 struct rxrpc_sock __rcu *socket; /* socket responsible */ 560 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 561 const struct rxrpc_security *security; /* applied security module */ 562 struct mutex user_mutex; /* User access mutex */ 563 unsigned long ack_at; /* When deferred ACK needs to happen */ 564 unsigned long ack_lost_at; /* When ACK is figured as lost */ 565 unsigned long resend_at; /* When next resend needs to happen */ 566 unsigned long ping_at; /* When next to send a ping */ 567 unsigned long keepalive_at; /* When next to send a keepalive ping */ 568 unsigned long expect_rx_by; /* When we expect to get a packet by */ 569 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 570 unsigned long expect_term_by; /* When we expect call termination by */ 571 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 572 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 573 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 574 struct timer_list timer; /* Combined event timer */ 575 struct work_struct processor; /* Event processor */ 576 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 577 struct list_head link; /* link in master call list */ 578 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 579 struct hlist_node error_link; /* link in error distribution list */ 580 struct list_head accept_link; /* Link in rx->acceptq */ 581 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 582 struct list_head sock_link; /* Link in rx->sock_calls */ 583 struct rb_node sock_node; /* Node in rx->calls */ 584 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 585 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 586 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 587 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 588 unsigned long user_call_ID; /* user-defined call ID */ 589 unsigned long flags; 590 unsigned long events; 591 spinlock_t lock; 592 spinlock_t notify_lock; /* Kernel notification lock */ 593 rwlock_t state_lock; /* lock for state transition */ 594 u32 abort_code; /* Local/remote abort code */ 595 int error; /* Local error incurred */ 596 enum rxrpc_call_state state; /* current state of call */ 597 enum rxrpc_call_completion completion; /* Call completion condition */ 598 atomic_t usage; 599 u16 service_id; /* service ID */ 600 u8 security_ix; /* Security type */ 601 u32 call_id; /* call ID on connection */ 602 u32 cid; /* connection ID plus channel index */ 603 int debug_id; /* debug ID for printks */ 604 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 605 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 606 bool rx_pkt_last; /* Current recvmsg packet is last */ 607 608 /* Rx/Tx circular buffer, depending on phase. 609 * 610 * In the Rx phase, packets are annotated with 0 or the number of the 611 * segment of a jumbo packet each buffer refers to. There can be up to 612 * 47 segments in a maximum-size UDP packet. 613 * 614 * In the Tx phase, packets are annotated with which buffers have been 615 * acked. 616 */ 617 #define RXRPC_RXTX_BUFF_SIZE 64 618 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 619 #define RXRPC_INIT_RX_WINDOW_SIZE 63 620 struct sk_buff **rxtx_buffer; 621 u8 *rxtx_annotations; 622 #define RXRPC_TX_ANNO_ACK 0 623 #define RXRPC_TX_ANNO_UNACK 1 624 #define RXRPC_TX_ANNO_NAK 2 625 #define RXRPC_TX_ANNO_RETRANS 3 626 #define RXRPC_TX_ANNO_MASK 0x03 627 #define RXRPC_TX_ANNO_LAST 0x04 628 #define RXRPC_TX_ANNO_RESENT 0x08 629 630 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 631 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 632 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 633 * not hard-ACK'd packet follows this. 634 */ 635 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 636 u16 tx_backoff; /* Delay to insert due to Tx failure */ 637 638 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 639 * is fixed, we keep these numbers in terms of segments (ie. DATA 640 * packets) rather than bytes. 641 */ 642 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 643 u8 cong_cwnd; /* Congestion window size */ 644 u8 cong_extra; /* Extra to send for congestion management */ 645 u8 cong_ssthresh; /* Slow-start threshold */ 646 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 647 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 648 u8 cong_cumul_acks; /* Cumulative ACK count */ 649 ktime_t cong_tstamp; /* Last time cwnd was changed */ 650 651 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 652 * consumed packet follows this. 653 */ 654 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 655 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 656 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 657 u8 rx_winsize; /* Size of Rx window */ 658 u8 tx_winsize; /* Maximum size of Tx window */ 659 bool tx_phase; /* T if transmission phase, F if receive phase */ 660 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 661 662 spinlock_t input_lock; /* Lock for packet input to this call */ 663 664 /* receive-phase ACK management */ 665 u8 ackr_reason; /* reason to ACK */ 666 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 667 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 668 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 669 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 670 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 671 672 /* ping management */ 673 rxrpc_serial_t ping_serial; /* Last ping sent */ 674 ktime_t ping_time; /* Time last ping sent */ 675 676 /* transmission-phase ACK management */ 677 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 678 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 679 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 680 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 681 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 682 }; 683 684 /* 685 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 686 */ 687 struct rxrpc_ack_summary { 688 u8 ack_reason; 689 u8 nr_acks; /* Number of ACKs in packet */ 690 u8 nr_nacks; /* Number of NACKs in packet */ 691 u8 nr_new_acks; /* Number of new ACKs in packet */ 692 u8 nr_new_nacks; /* Number of new NACKs in packet */ 693 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 694 bool new_low_nack; /* T if new low NACK found */ 695 bool retrans_timeo; /* T if reTx due to timeout happened */ 696 u8 flight_size; /* Number of unreceived transmissions */ 697 /* Place to stash values for tracing */ 698 enum rxrpc_congest_mode mode:8; 699 u8 cwnd; 700 u8 ssthresh; 701 u8 dup_acks; 702 u8 cumulative_acks; 703 }; 704 705 /* 706 * sendmsg() cmsg-specified parameters. 707 */ 708 enum rxrpc_command { 709 RXRPC_CMD_SEND_DATA, /* send data message */ 710 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 711 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 712 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 713 }; 714 715 struct rxrpc_call_params { 716 s64 tx_total_len; /* Total Tx data length (if send data) */ 717 unsigned long user_call_ID; /* User's call ID */ 718 struct { 719 u32 hard; /* Maximum lifetime (sec) */ 720 u32 idle; /* Max time since last data packet (msec) */ 721 u32 normal; /* Max time since last call packet (msec) */ 722 } timeouts; 723 u8 nr_timeouts; /* Number of timeouts specified */ 724 bool intr; /* The call is interruptible */ 725 }; 726 727 struct rxrpc_send_params { 728 struct rxrpc_call_params call; 729 u32 abort_code; /* Abort code to Tx (if abort) */ 730 enum rxrpc_command command : 8; /* The command to implement */ 731 bool exclusive; /* Shared or exclusive call */ 732 bool upgrade; /* If the connection is upgradeable */ 733 }; 734 735 #include <trace/events/rxrpc.h> 736 737 /* 738 * af_rxrpc.c 739 */ 740 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 741 extern struct workqueue_struct *rxrpc_workqueue; 742 743 /* 744 * call_accept.c 745 */ 746 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 747 void rxrpc_discard_prealloc(struct rxrpc_sock *); 748 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 749 struct rxrpc_sock *, 750 struct sk_buff *); 751 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 752 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 753 rxrpc_notify_rx_t); 754 int rxrpc_reject_call(struct rxrpc_sock *); 755 756 /* 757 * call_event.c 758 */ 759 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 760 enum rxrpc_propose_ack_trace); 761 void rxrpc_process_call(struct work_struct *); 762 763 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 764 unsigned long expire_at, 765 unsigned long now, 766 enum rxrpc_timer_trace why) 767 { 768 trace_rxrpc_timer(call, why, now); 769 timer_reduce(&call->timer, expire_at); 770 } 771 772 /* 773 * call_object.c 774 */ 775 extern const char *const rxrpc_call_states[]; 776 extern const char *const rxrpc_call_completions[]; 777 extern unsigned int rxrpc_max_call_lifetime; 778 extern struct kmem_cache *rxrpc_call_jar; 779 780 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 781 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 782 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 783 struct rxrpc_conn_parameters *, 784 struct sockaddr_rxrpc *, 785 struct rxrpc_call_params *, gfp_t, 786 unsigned int); 787 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 788 struct sk_buff *); 789 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 790 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 791 bool __rxrpc_queue_call(struct rxrpc_call *); 792 bool rxrpc_queue_call(struct rxrpc_call *); 793 void rxrpc_see_call(struct rxrpc_call *); 794 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 795 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 796 void rxrpc_cleanup_call(struct rxrpc_call *); 797 void rxrpc_destroy_all_calls(struct rxrpc_net *); 798 799 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 800 { 801 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 802 } 803 804 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 805 { 806 return !rxrpc_is_service_call(call); 807 } 808 809 /* 810 * Transition a call to the complete state. 811 */ 812 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 813 enum rxrpc_call_completion compl, 814 u32 abort_code, 815 int error) 816 { 817 if (call->state < RXRPC_CALL_COMPLETE) { 818 call->abort_code = abort_code; 819 call->error = error; 820 call->completion = compl, 821 call->state = RXRPC_CALL_COMPLETE; 822 trace_rxrpc_call_complete(call); 823 wake_up(&call->waitq); 824 return true; 825 } 826 return false; 827 } 828 829 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 830 enum rxrpc_call_completion compl, 831 u32 abort_code, 832 int error) 833 { 834 bool ret; 835 836 write_lock_bh(&call->state_lock); 837 ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 838 write_unlock_bh(&call->state_lock); 839 return ret; 840 } 841 842 /* 843 * Record that a call successfully completed. 844 */ 845 static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 846 { 847 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 848 } 849 850 static inline bool rxrpc_call_completed(struct rxrpc_call *call) 851 { 852 bool ret; 853 854 write_lock_bh(&call->state_lock); 855 ret = __rxrpc_call_completed(call); 856 write_unlock_bh(&call->state_lock); 857 return ret; 858 } 859 860 /* 861 * Record that a call is locally aborted. 862 */ 863 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 864 rxrpc_seq_t seq, 865 u32 abort_code, int error) 866 { 867 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 868 abort_code, error); 869 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 870 abort_code, error); 871 } 872 873 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 874 rxrpc_seq_t seq, u32 abort_code, int error) 875 { 876 bool ret; 877 878 write_lock_bh(&call->state_lock); 879 ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 880 write_unlock_bh(&call->state_lock); 881 return ret; 882 } 883 884 /* 885 * Abort a call due to a protocol error. 886 */ 887 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 888 struct sk_buff *skb, 889 const char *eproto_why, 890 const char *why, 891 u32 abort_code) 892 { 893 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 894 895 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 896 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 897 } 898 899 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 900 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 901 (abort_why), (abort_code)) 902 903 /* 904 * conn_client.c 905 */ 906 extern unsigned int rxrpc_max_client_connections; 907 extern unsigned int rxrpc_reap_client_connections; 908 extern unsigned long rxrpc_conn_idle_client_expiry; 909 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 910 extern struct idr rxrpc_client_conn_ids; 911 912 void rxrpc_destroy_client_conn_ids(void); 913 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 914 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 915 gfp_t); 916 void rxrpc_expose_client_call(struct rxrpc_call *); 917 void rxrpc_disconnect_client_call(struct rxrpc_call *); 918 void rxrpc_put_client_conn(struct rxrpc_connection *); 919 void rxrpc_discard_expired_client_conns(struct work_struct *); 920 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 921 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 922 923 /* 924 * conn_event.c 925 */ 926 void rxrpc_process_connection(struct work_struct *); 927 928 /* 929 * conn_object.c 930 */ 931 extern unsigned int rxrpc_connection_expiry; 932 extern unsigned int rxrpc_closed_conn_expiry; 933 934 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 935 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 936 struct sk_buff *, 937 struct rxrpc_peer **); 938 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 939 void rxrpc_disconnect_call(struct rxrpc_call *); 940 void rxrpc_kill_connection(struct rxrpc_connection *); 941 bool rxrpc_queue_conn(struct rxrpc_connection *); 942 void rxrpc_see_connection(struct rxrpc_connection *); 943 void rxrpc_get_connection(struct rxrpc_connection *); 944 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 945 void rxrpc_put_service_conn(struct rxrpc_connection *); 946 void rxrpc_service_connection_reaper(struct work_struct *); 947 void rxrpc_destroy_all_connections(struct rxrpc_net *); 948 949 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 950 { 951 return conn->out_clientflag; 952 } 953 954 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 955 { 956 return !rxrpc_conn_is_client(conn); 957 } 958 959 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 960 { 961 if (!conn) 962 return; 963 964 if (rxrpc_conn_is_client(conn)) 965 rxrpc_put_client_conn(conn); 966 else 967 rxrpc_put_service_conn(conn); 968 } 969 970 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 971 unsigned long expire_at) 972 { 973 timer_reduce(&conn->timer, expire_at); 974 } 975 976 /* 977 * conn_service.c 978 */ 979 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 980 struct sk_buff *); 981 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 982 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 983 const struct rxrpc_security *, struct key *, 984 struct sk_buff *); 985 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 986 987 /* 988 * input.c 989 */ 990 int rxrpc_input_packet(struct sock *, struct sk_buff *); 991 992 /* 993 * insecure.c 994 */ 995 extern const struct rxrpc_security rxrpc_no_security; 996 997 /* 998 * key.c 999 */ 1000 extern struct key_type key_type_rxrpc; 1001 extern struct key_type key_type_rxrpc_s; 1002 1003 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 1004 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 1005 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 1006 u32); 1007 1008 /* 1009 * local_event.c 1010 */ 1011 extern void rxrpc_process_local_events(struct rxrpc_local *); 1012 1013 /* 1014 * local_object.c 1015 */ 1016 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 1017 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 1018 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 1019 void rxrpc_put_local(struct rxrpc_local *); 1020 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 1021 void rxrpc_unuse_local(struct rxrpc_local *); 1022 void rxrpc_queue_local(struct rxrpc_local *); 1023 void rxrpc_destroy_all_locals(struct rxrpc_net *); 1024 1025 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 1026 { 1027 return atomic_dec_return(&local->active_users) == 0; 1028 } 1029 1030 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 1031 { 1032 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 1033 } 1034 1035 /* 1036 * misc.c 1037 */ 1038 extern unsigned int rxrpc_max_backlog __read_mostly; 1039 extern unsigned long rxrpc_requested_ack_delay; 1040 extern unsigned long rxrpc_soft_ack_delay; 1041 extern unsigned long rxrpc_idle_ack_delay; 1042 extern unsigned int rxrpc_rx_window_size; 1043 extern unsigned int rxrpc_rx_mtu; 1044 extern unsigned int rxrpc_rx_jumbo_max; 1045 extern unsigned long rxrpc_resend_timeout; 1046 1047 extern const s8 rxrpc_ack_priority[]; 1048 1049 /* 1050 * net_ns.c 1051 */ 1052 extern unsigned int rxrpc_net_id; 1053 extern struct pernet_operations rxrpc_net_ops; 1054 1055 static inline struct rxrpc_net *rxrpc_net(struct net *net) 1056 { 1057 return net_generic(net, rxrpc_net_id); 1058 } 1059 1060 /* 1061 * output.c 1062 */ 1063 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 1064 int rxrpc_send_abort_packet(struct rxrpc_call *); 1065 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1066 void rxrpc_reject_packets(struct rxrpc_local *); 1067 void rxrpc_send_keepalive(struct rxrpc_peer *); 1068 1069 /* 1070 * peer_event.c 1071 */ 1072 void rxrpc_error_report(struct sock *); 1073 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1074 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1075 void rxrpc_peer_keepalive_worker(struct work_struct *); 1076 1077 /* 1078 * peer_object.c 1079 */ 1080 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1081 const struct sockaddr_rxrpc *); 1082 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1083 struct sockaddr_rxrpc *, gfp_t); 1084 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1085 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 1086 struct rxrpc_peer *); 1087 void rxrpc_destroy_all_peers(struct rxrpc_net *); 1088 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 1089 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 1090 void rxrpc_put_peer(struct rxrpc_peer *); 1091 void rxrpc_put_peer_locked(struct rxrpc_peer *); 1092 1093 /* 1094 * proc.c 1095 */ 1096 extern const struct seq_operations rxrpc_call_seq_ops; 1097 extern const struct seq_operations rxrpc_connection_seq_ops; 1098 extern const struct seq_operations rxrpc_peer_seq_ops; 1099 1100 /* 1101 * recvmsg.c 1102 */ 1103 void rxrpc_notify_socket(struct rxrpc_call *); 1104 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1105 1106 /* 1107 * rxkad.c 1108 */ 1109 #ifdef CONFIG_RXKAD 1110 extern const struct rxrpc_security rxkad; 1111 #endif 1112 1113 /* 1114 * security.c 1115 */ 1116 int __init rxrpc_init_security(void); 1117 void rxrpc_exit_security(void); 1118 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1119 bool rxrpc_look_up_server_security(struct rxrpc_local *, struct rxrpc_sock *, 1120 const struct rxrpc_security **, struct key **, 1121 struct sk_buff *); 1122 1123 /* 1124 * sendmsg.c 1125 */ 1126 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1127 1128 /* 1129 * skbuff.c 1130 */ 1131 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1132 void rxrpc_packet_destructor(struct sk_buff *); 1133 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1134 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1135 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1136 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1137 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1138 void rxrpc_purge_queue(struct sk_buff_head *); 1139 1140 /* 1141 * sysctl.c 1142 */ 1143 #ifdef CONFIG_SYSCTL 1144 extern int __init rxrpc_sysctl_init(void); 1145 extern void rxrpc_sysctl_exit(void); 1146 #else 1147 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1148 static inline void rxrpc_sysctl_exit(void) {} 1149 #endif 1150 1151 /* 1152 * utils.c 1153 */ 1154 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1155 1156 static inline bool before(u32 seq1, u32 seq2) 1157 { 1158 return (s32)(seq1 - seq2) < 0; 1159 } 1160 static inline bool before_eq(u32 seq1, u32 seq2) 1161 { 1162 return (s32)(seq1 - seq2) <= 0; 1163 } 1164 static inline bool after(u32 seq1, u32 seq2) 1165 { 1166 return (s32)(seq1 - seq2) > 0; 1167 } 1168 static inline bool after_eq(u32 seq1, u32 seq2) 1169 { 1170 return (s32)(seq1 - seq2) >= 0; 1171 } 1172 1173 /* 1174 * debug tracing 1175 */ 1176 extern unsigned int rxrpc_debug; 1177 1178 #define dbgprintk(FMT,...) \ 1179 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1180 1181 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1182 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1183 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1184 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1185 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1186 1187 1188 #if defined(__KDEBUG) 1189 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1190 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1191 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1192 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1193 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1194 1195 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1196 #define RXRPC_DEBUG_KENTER 0x01 1197 #define RXRPC_DEBUG_KLEAVE 0x02 1198 #define RXRPC_DEBUG_KDEBUG 0x04 1199 #define RXRPC_DEBUG_KPROTO 0x08 1200 #define RXRPC_DEBUG_KNET 0x10 1201 1202 #define _enter(FMT,...) \ 1203 do { \ 1204 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1205 kenter(FMT,##__VA_ARGS__); \ 1206 } while (0) 1207 1208 #define _leave(FMT,...) \ 1209 do { \ 1210 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1211 kleave(FMT,##__VA_ARGS__); \ 1212 } while (0) 1213 1214 #define _debug(FMT,...) \ 1215 do { \ 1216 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1217 kdebug(FMT,##__VA_ARGS__); \ 1218 } while (0) 1219 1220 #define _proto(FMT,...) \ 1221 do { \ 1222 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1223 kproto(FMT,##__VA_ARGS__); \ 1224 } while (0) 1225 1226 #define _net(FMT,...) \ 1227 do { \ 1228 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1229 knet(FMT,##__VA_ARGS__); \ 1230 } while (0) 1231 1232 #else 1233 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1234 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1235 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1236 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1237 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1238 #endif 1239 1240 /* 1241 * debug assertion checking 1242 */ 1243 #if 1 // defined(__KDEBUGALL) 1244 1245 #define ASSERT(X) \ 1246 do { \ 1247 if (unlikely(!(X))) { \ 1248 pr_err("Assertion failed\n"); \ 1249 BUG(); \ 1250 } \ 1251 } while (0) 1252 1253 #define ASSERTCMP(X, OP, Y) \ 1254 do { \ 1255 __typeof__(X) _x = (X); \ 1256 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1257 if (unlikely(!(_x OP _y))) { \ 1258 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1259 (unsigned long)_x, (unsigned long)_x, #OP, \ 1260 (unsigned long)_y, (unsigned long)_y); \ 1261 BUG(); \ 1262 } \ 1263 } while (0) 1264 1265 #define ASSERTIF(C, X) \ 1266 do { \ 1267 if (unlikely((C) && !(X))) { \ 1268 pr_err("Assertion failed\n"); \ 1269 BUG(); \ 1270 } \ 1271 } while (0) 1272 1273 #define ASSERTIFCMP(C, X, OP, Y) \ 1274 do { \ 1275 __typeof__(X) _x = (X); \ 1276 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1277 if (unlikely((C) && !(_x OP _y))) { \ 1278 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1279 (unsigned long)_x, (unsigned long)_x, #OP, \ 1280 (unsigned long)_y, (unsigned long)_y); \ 1281 BUG(); \ 1282 } \ 1283 } while (0) 1284 1285 #else 1286 1287 #define ASSERT(X) \ 1288 do { \ 1289 } while (0) 1290 1291 #define ASSERTCMP(X, OP, Y) \ 1292 do { \ 1293 } while (0) 1294 1295 #define ASSERTIF(C, X) \ 1296 do { \ 1297 } while (0) 1298 1299 #define ASSERTIFCMP(C, X, OP, Y) \ 1300 do { \ 1301 } while (0) 1302 1303 #endif /* __KDEBUGALL */ 1304