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