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_PINGING, /* Ping in process */ 492 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 493 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 494 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 495 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 496 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 497 }; 498 499 /* 500 * Events that can be raised on a call. 501 */ 502 enum rxrpc_call_event { 503 RXRPC_CALL_EV_ACK, /* need to generate ACK */ 504 RXRPC_CALL_EV_ABORT, /* need to generate abort */ 505 RXRPC_CALL_EV_RESEND, /* Tx resend required */ 506 RXRPC_CALL_EV_PING, /* Ping send required */ 507 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 508 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 509 }; 510 511 /* 512 * The states that a call can be in. 513 */ 514 enum rxrpc_call_state { 515 RXRPC_CALL_UNINITIALISED, 516 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 517 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 518 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 519 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 520 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 521 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 522 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 523 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 524 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 525 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 526 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 527 RXRPC_CALL_COMPLETE, /* - call complete */ 528 NR__RXRPC_CALL_STATES 529 }; 530 531 /* 532 * Call completion condition (state == RXRPC_CALL_COMPLETE). 533 */ 534 enum rxrpc_call_completion { 535 RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 536 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 537 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 538 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 539 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 540 NR__RXRPC_CALL_COMPLETIONS 541 }; 542 543 /* 544 * Call Tx congestion management modes. 545 */ 546 enum rxrpc_congest_mode { 547 RXRPC_CALL_SLOW_START, 548 RXRPC_CALL_CONGEST_AVOIDANCE, 549 RXRPC_CALL_PACKET_LOSS, 550 RXRPC_CALL_FAST_RETRANSMIT, 551 NR__RXRPC_CONGEST_MODES 552 }; 553 554 /* 555 * RxRPC call definition 556 * - matched by { connection, call_id } 557 */ 558 struct rxrpc_call { 559 struct rcu_head rcu; 560 struct rxrpc_connection *conn; /* connection carrying call */ 561 struct rxrpc_peer *peer; /* Peer record for remote address */ 562 struct rxrpc_sock __rcu *socket; /* socket responsible */ 563 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 564 const struct rxrpc_security *security; /* applied security module */ 565 struct mutex user_mutex; /* User access mutex */ 566 unsigned long ack_at; /* When deferred ACK needs to happen */ 567 unsigned long ack_lost_at; /* When ACK is figured as lost */ 568 unsigned long resend_at; /* When next resend needs to happen */ 569 unsigned long ping_at; /* When next to send a ping */ 570 unsigned long keepalive_at; /* When next to send a keepalive ping */ 571 unsigned long expect_rx_by; /* When we expect to get a packet by */ 572 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 573 unsigned long expect_term_by; /* When we expect call termination by */ 574 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 575 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 576 struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 577 struct timer_list timer; /* Combined event timer */ 578 struct work_struct processor; /* Event processor */ 579 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 580 struct list_head link; /* link in master call list */ 581 struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 582 struct hlist_node error_link; /* link in error distribution list */ 583 struct list_head accept_link; /* Link in rx->acceptq */ 584 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 585 struct list_head sock_link; /* Link in rx->sock_calls */ 586 struct rb_node sock_node; /* Node in rx->calls */ 587 struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 588 wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 589 s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 590 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 591 unsigned long user_call_ID; /* user-defined call ID */ 592 unsigned long flags; 593 unsigned long events; 594 spinlock_t lock; 595 spinlock_t notify_lock; /* Kernel notification lock */ 596 rwlock_t state_lock; /* lock for state transition */ 597 u32 abort_code; /* Local/remote abort code */ 598 int error; /* Local error incurred */ 599 enum rxrpc_call_state state; /* current state of call */ 600 enum rxrpc_call_completion completion; /* Call completion condition */ 601 atomic_t usage; 602 u16 service_id; /* service ID */ 603 u8 security_ix; /* Security type */ 604 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 605 u32 call_id; /* call ID on connection */ 606 u32 cid; /* connection ID plus channel index */ 607 int debug_id; /* debug ID for printks */ 608 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 609 unsigned short rx_pkt_len; /* Current recvmsg packet len */ 610 bool rx_pkt_last; /* Current recvmsg packet is last */ 611 612 /* Rx/Tx circular buffer, depending on phase. 613 * 614 * In the Rx phase, packets are annotated with 0 or the number of the 615 * segment of a jumbo packet each buffer refers to. There can be up to 616 * 47 segments in a maximum-size UDP packet. 617 * 618 * In the Tx phase, packets are annotated with which buffers have been 619 * acked. 620 */ 621 #define RXRPC_RXTX_BUFF_SIZE 64 622 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 623 #define RXRPC_INIT_RX_WINDOW_SIZE 63 624 struct sk_buff **rxtx_buffer; 625 u8 *rxtx_annotations; 626 #define RXRPC_TX_ANNO_ACK 0 627 #define RXRPC_TX_ANNO_UNACK 1 628 #define RXRPC_TX_ANNO_NAK 2 629 #define RXRPC_TX_ANNO_RETRANS 3 630 #define RXRPC_TX_ANNO_MASK 0x03 631 #define RXRPC_TX_ANNO_LAST 0x04 632 #define RXRPC_TX_ANNO_RESENT 0x08 633 634 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 635 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 636 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 637 * not hard-ACK'd packet follows this. 638 */ 639 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 640 u16 tx_backoff; /* Delay to insert due to Tx failure */ 641 642 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 643 * is fixed, we keep these numbers in terms of segments (ie. DATA 644 * packets) rather than bytes. 645 */ 646 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 647 u8 cong_cwnd; /* Congestion window size */ 648 u8 cong_extra; /* Extra to send for congestion management */ 649 u8 cong_ssthresh; /* Slow-start threshold */ 650 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 651 u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 652 u8 cong_cumul_acks; /* Cumulative ACK count */ 653 ktime_t cong_tstamp; /* Last time cwnd was changed */ 654 655 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 656 * consumed packet follows this. 657 */ 658 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 659 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 660 rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 661 u8 rx_winsize; /* Size of Rx window */ 662 u8 tx_winsize; /* Maximum size of Tx window */ 663 bool tx_phase; /* T if transmission phase, F if receive phase */ 664 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 665 666 spinlock_t input_lock; /* Lock for packet input to this call */ 667 668 /* receive-phase ACK management */ 669 u8 ackr_reason; /* reason to ACK */ 670 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 671 rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 672 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 673 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 674 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 675 676 /* ping management */ 677 rxrpc_serial_t ping_serial; /* Last ping sent */ 678 ktime_t ping_time; /* Time last ping sent */ 679 680 /* transmission-phase ACK management */ 681 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 682 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 683 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 684 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 685 }; 686 687 /* 688 * Summary of a new ACK and the changes it made to the Tx buffer packet states. 689 */ 690 struct rxrpc_ack_summary { 691 u8 ack_reason; 692 u8 nr_acks; /* Number of ACKs in packet */ 693 u8 nr_nacks; /* Number of NACKs in packet */ 694 u8 nr_new_acks; /* Number of new ACKs in packet */ 695 u8 nr_new_nacks; /* Number of new NACKs in packet */ 696 u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 697 bool new_low_nack; /* T if new low NACK found */ 698 bool retrans_timeo; /* T if reTx due to timeout happened */ 699 u8 flight_size; /* Number of unreceived transmissions */ 700 /* Place to stash values for tracing */ 701 enum rxrpc_congest_mode mode:8; 702 u8 cwnd; 703 u8 ssthresh; 704 u8 dup_acks; 705 u8 cumulative_acks; 706 }; 707 708 /* 709 * sendmsg() cmsg-specified parameters. 710 */ 711 enum rxrpc_command { 712 RXRPC_CMD_SEND_DATA, /* send data message */ 713 RXRPC_CMD_SEND_ABORT, /* request abort generation */ 714 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 715 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 716 }; 717 718 struct rxrpc_call_params { 719 s64 tx_total_len; /* Total Tx data length (if send data) */ 720 unsigned long user_call_ID; /* User's call ID */ 721 struct { 722 u32 hard; /* Maximum lifetime (sec) */ 723 u32 idle; /* Max time since last data packet (msec) */ 724 u32 normal; /* Max time since last call packet (msec) */ 725 } timeouts; 726 u8 nr_timeouts; /* Number of timeouts specified */ 727 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 728 }; 729 730 struct rxrpc_send_params { 731 struct rxrpc_call_params call; 732 u32 abort_code; /* Abort code to Tx (if abort) */ 733 enum rxrpc_command command : 8; /* The command to implement */ 734 bool exclusive; /* Shared or exclusive call */ 735 bool upgrade; /* If the connection is upgradeable */ 736 }; 737 738 #include <trace/events/rxrpc.h> 739 740 /* 741 * af_rxrpc.c 742 */ 743 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 744 extern struct workqueue_struct *rxrpc_workqueue; 745 746 /* 747 * call_accept.c 748 */ 749 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 750 void rxrpc_discard_prealloc(struct rxrpc_sock *); 751 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 752 struct rxrpc_sock *, 753 struct sk_buff *); 754 void rxrpc_accept_incoming_calls(struct rxrpc_local *); 755 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 756 rxrpc_notify_rx_t); 757 int rxrpc_reject_call(struct rxrpc_sock *); 758 759 /* 760 * call_event.c 761 */ 762 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 763 enum rxrpc_propose_ack_trace); 764 void rxrpc_process_call(struct work_struct *); 765 766 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 767 unsigned long expire_at, 768 unsigned long now, 769 enum rxrpc_timer_trace why) 770 { 771 trace_rxrpc_timer(call, why, now); 772 timer_reduce(&call->timer, expire_at); 773 } 774 775 /* 776 * call_object.c 777 */ 778 extern const char *const rxrpc_call_states[]; 779 extern const char *const rxrpc_call_completions[]; 780 extern unsigned int rxrpc_max_call_lifetime; 781 extern struct kmem_cache *rxrpc_call_jar; 782 783 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 784 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 785 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 786 struct rxrpc_conn_parameters *, 787 struct sockaddr_rxrpc *, 788 struct rxrpc_call_params *, gfp_t, 789 unsigned int); 790 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 791 struct sk_buff *); 792 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 793 void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 794 bool __rxrpc_queue_call(struct rxrpc_call *); 795 bool rxrpc_queue_call(struct rxrpc_call *); 796 void rxrpc_see_call(struct rxrpc_call *); 797 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 798 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 799 void rxrpc_cleanup_call(struct rxrpc_call *); 800 void rxrpc_destroy_all_calls(struct rxrpc_net *); 801 802 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 803 { 804 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 805 } 806 807 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 808 { 809 return !rxrpc_is_service_call(call); 810 } 811 812 /* 813 * conn_client.c 814 */ 815 extern unsigned int rxrpc_max_client_connections; 816 extern unsigned int rxrpc_reap_client_connections; 817 extern unsigned long rxrpc_conn_idle_client_expiry; 818 extern unsigned long rxrpc_conn_idle_client_fast_expiry; 819 extern struct idr rxrpc_client_conn_ids; 820 821 void rxrpc_destroy_client_conn_ids(void); 822 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 823 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 824 gfp_t); 825 void rxrpc_expose_client_call(struct rxrpc_call *); 826 void rxrpc_disconnect_client_call(struct rxrpc_call *); 827 void rxrpc_put_client_conn(struct rxrpc_connection *); 828 void rxrpc_discard_expired_client_conns(struct work_struct *); 829 void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 830 void rxrpc_clean_up_local_conns(struct rxrpc_local *); 831 832 /* 833 * conn_event.c 834 */ 835 void rxrpc_process_connection(struct work_struct *); 836 837 /* 838 * conn_object.c 839 */ 840 extern unsigned int rxrpc_connection_expiry; 841 extern unsigned int rxrpc_closed_conn_expiry; 842 843 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 844 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 845 struct sk_buff *, 846 struct rxrpc_peer **); 847 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 848 void rxrpc_disconnect_call(struct rxrpc_call *); 849 void rxrpc_kill_connection(struct rxrpc_connection *); 850 bool rxrpc_queue_conn(struct rxrpc_connection *); 851 void rxrpc_see_connection(struct rxrpc_connection *); 852 void rxrpc_get_connection(struct rxrpc_connection *); 853 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 854 void rxrpc_put_service_conn(struct rxrpc_connection *); 855 void rxrpc_service_connection_reaper(struct work_struct *); 856 void rxrpc_destroy_all_connections(struct rxrpc_net *); 857 858 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 859 { 860 return conn->out_clientflag; 861 } 862 863 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 864 { 865 return !rxrpc_conn_is_client(conn); 866 } 867 868 static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 869 { 870 if (!conn) 871 return; 872 873 if (rxrpc_conn_is_client(conn)) 874 rxrpc_put_client_conn(conn); 875 else 876 rxrpc_put_service_conn(conn); 877 } 878 879 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 880 unsigned long expire_at) 881 { 882 timer_reduce(&conn->timer, expire_at); 883 } 884 885 /* 886 * conn_service.c 887 */ 888 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 889 struct sk_buff *); 890 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 891 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 892 const struct rxrpc_security *, struct key *, 893 struct sk_buff *); 894 void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 895 896 /* 897 * input.c 898 */ 899 int rxrpc_input_packet(struct sock *, struct sk_buff *); 900 901 /* 902 * insecure.c 903 */ 904 extern const struct rxrpc_security rxrpc_no_security; 905 906 /* 907 * key.c 908 */ 909 extern struct key_type key_type_rxrpc; 910 extern struct key_type key_type_rxrpc_s; 911 912 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 913 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 914 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 915 u32); 916 917 /* 918 * local_event.c 919 */ 920 extern void rxrpc_process_local_events(struct rxrpc_local *); 921 922 /* 923 * local_object.c 924 */ 925 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 926 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 927 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 928 void rxrpc_put_local(struct rxrpc_local *); 929 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 930 void rxrpc_unuse_local(struct rxrpc_local *); 931 void rxrpc_queue_local(struct rxrpc_local *); 932 void rxrpc_destroy_all_locals(struct rxrpc_net *); 933 934 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 935 { 936 return atomic_dec_return(&local->active_users) == 0; 937 } 938 939 static inline bool __rxrpc_use_local(struct rxrpc_local *local) 940 { 941 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 942 } 943 944 /* 945 * misc.c 946 */ 947 extern unsigned int rxrpc_max_backlog __read_mostly; 948 extern unsigned long rxrpc_requested_ack_delay; 949 extern unsigned long rxrpc_soft_ack_delay; 950 extern unsigned long rxrpc_idle_ack_delay; 951 extern unsigned int rxrpc_rx_window_size; 952 extern unsigned int rxrpc_rx_mtu; 953 extern unsigned int rxrpc_rx_jumbo_max; 954 955 extern const s8 rxrpc_ack_priority[]; 956 957 /* 958 * net_ns.c 959 */ 960 extern unsigned int rxrpc_net_id; 961 extern struct pernet_operations rxrpc_net_ops; 962 963 static inline struct rxrpc_net *rxrpc_net(struct net *net) 964 { 965 return net_generic(net, rxrpc_net_id); 966 } 967 968 /* 969 * output.c 970 */ 971 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 972 int rxrpc_send_abort_packet(struct rxrpc_call *); 973 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 974 void rxrpc_reject_packets(struct rxrpc_local *); 975 void rxrpc_send_keepalive(struct rxrpc_peer *); 976 977 /* 978 * peer_event.c 979 */ 980 void rxrpc_error_report(struct sock *); 981 void rxrpc_peer_keepalive_worker(struct work_struct *); 982 983 /* 984 * peer_object.c 985 */ 986 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 987 const struct sockaddr_rxrpc *); 988 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 989 struct sockaddr_rxrpc *, gfp_t); 990 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 991 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 992 struct rxrpc_peer *); 993 void rxrpc_destroy_all_peers(struct rxrpc_net *); 994 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 995 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 996 void rxrpc_put_peer(struct rxrpc_peer *); 997 void rxrpc_put_peer_locked(struct rxrpc_peer *); 998 999 /* 1000 * proc.c 1001 */ 1002 extern const struct seq_operations rxrpc_call_seq_ops; 1003 extern const struct seq_operations rxrpc_connection_seq_ops; 1004 extern const struct seq_operations rxrpc_peer_seq_ops; 1005 1006 /* 1007 * recvmsg.c 1008 */ 1009 void rxrpc_notify_socket(struct rxrpc_call *); 1010 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1011 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 1012 bool __rxrpc_call_completed(struct rxrpc_call *); 1013 bool rxrpc_call_completed(struct rxrpc_call *); 1014 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1015 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 1016 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 1017 1018 /* 1019 * Abort a call due to a protocol error. 1020 */ 1021 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 1022 struct sk_buff *skb, 1023 const char *eproto_why, 1024 const char *why, 1025 u32 abort_code) 1026 { 1027 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 1028 1029 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 1030 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 1031 } 1032 1033 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 1034 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 1035 (abort_why), (abort_code)) 1036 1037 /* 1038 * rtt.c 1039 */ 1040 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1041 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1042 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1043 void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1044 1045 /* 1046 * rxkad.c 1047 */ 1048 #ifdef CONFIG_RXKAD 1049 extern const struct rxrpc_security rxkad; 1050 #endif 1051 1052 /* 1053 * security.c 1054 */ 1055 int __init rxrpc_init_security(void); 1056 void rxrpc_exit_security(void); 1057 int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1058 bool rxrpc_look_up_server_security(struct rxrpc_local *, struct rxrpc_sock *, 1059 const struct rxrpc_security **, struct key **, 1060 struct sk_buff *); 1061 1062 /* 1063 * sendmsg.c 1064 */ 1065 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 1066 1067 /* 1068 * skbuff.c 1069 */ 1070 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 1071 void rxrpc_packet_destructor(struct sk_buff *); 1072 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 1073 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1074 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 1075 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 1076 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1077 void rxrpc_purge_queue(struct sk_buff_head *); 1078 1079 /* 1080 * sysctl.c 1081 */ 1082 #ifdef CONFIG_SYSCTL 1083 extern int __init rxrpc_sysctl_init(void); 1084 extern void rxrpc_sysctl_exit(void); 1085 #else 1086 static inline int __init rxrpc_sysctl_init(void) { return 0; } 1087 static inline void rxrpc_sysctl_exit(void) {} 1088 #endif 1089 1090 /* 1091 * utils.c 1092 */ 1093 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1094 1095 static inline bool before(u32 seq1, u32 seq2) 1096 { 1097 return (s32)(seq1 - seq2) < 0; 1098 } 1099 static inline bool before_eq(u32 seq1, u32 seq2) 1100 { 1101 return (s32)(seq1 - seq2) <= 0; 1102 } 1103 static inline bool after(u32 seq1, u32 seq2) 1104 { 1105 return (s32)(seq1 - seq2) > 0; 1106 } 1107 static inline bool after_eq(u32 seq1, u32 seq2) 1108 { 1109 return (s32)(seq1 - seq2) >= 0; 1110 } 1111 1112 /* 1113 * debug tracing 1114 */ 1115 extern unsigned int rxrpc_debug; 1116 1117 #define dbgprintk(FMT,...) \ 1118 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1119 1120 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1121 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1122 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1123 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 1124 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 1125 1126 1127 #if defined(__KDEBUG) 1128 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1129 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1130 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1131 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 1132 #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 1133 1134 #elif defined(CONFIG_AF_RXRPC_DEBUG) 1135 #define RXRPC_DEBUG_KENTER 0x01 1136 #define RXRPC_DEBUG_KLEAVE 0x02 1137 #define RXRPC_DEBUG_KDEBUG 0x04 1138 #define RXRPC_DEBUG_KPROTO 0x08 1139 #define RXRPC_DEBUG_KNET 0x10 1140 1141 #define _enter(FMT,...) \ 1142 do { \ 1143 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 1144 kenter(FMT,##__VA_ARGS__); \ 1145 } while (0) 1146 1147 #define _leave(FMT,...) \ 1148 do { \ 1149 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 1150 kleave(FMT,##__VA_ARGS__); \ 1151 } while (0) 1152 1153 #define _debug(FMT,...) \ 1154 do { \ 1155 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 1156 kdebug(FMT,##__VA_ARGS__); \ 1157 } while (0) 1158 1159 #define _proto(FMT,...) \ 1160 do { \ 1161 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 1162 kproto(FMT,##__VA_ARGS__); \ 1163 } while (0) 1164 1165 #define _net(FMT,...) \ 1166 do { \ 1167 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 1168 knet(FMT,##__VA_ARGS__); \ 1169 } while (0) 1170 1171 #else 1172 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1173 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1174 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1175 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 1176 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 1177 #endif 1178 1179 /* 1180 * debug assertion checking 1181 */ 1182 #if 1 // defined(__KDEBUGALL) 1183 1184 #define ASSERT(X) \ 1185 do { \ 1186 if (unlikely(!(X))) { \ 1187 pr_err("Assertion failed\n"); \ 1188 BUG(); \ 1189 } \ 1190 } while (0) 1191 1192 #define ASSERTCMP(X, OP, Y) \ 1193 do { \ 1194 __typeof__(X) _x = (X); \ 1195 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1196 if (unlikely(!(_x OP _y))) { \ 1197 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1198 (unsigned long)_x, (unsigned long)_x, #OP, \ 1199 (unsigned long)_y, (unsigned long)_y); \ 1200 BUG(); \ 1201 } \ 1202 } while (0) 1203 1204 #define ASSERTIF(C, X) \ 1205 do { \ 1206 if (unlikely((C) && !(X))) { \ 1207 pr_err("Assertion failed\n"); \ 1208 BUG(); \ 1209 } \ 1210 } while (0) 1211 1212 #define ASSERTIFCMP(C, X, OP, Y) \ 1213 do { \ 1214 __typeof__(X) _x = (X); \ 1215 __typeof__(Y) _y = (__typeof__(X))(Y); \ 1216 if (unlikely((C) && !(_x OP _y))) { \ 1217 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1218 (unsigned long)_x, (unsigned long)_x, #OP, \ 1219 (unsigned long)_y, (unsigned long)_y); \ 1220 BUG(); \ 1221 } \ 1222 } while (0) 1223 1224 #else 1225 1226 #define ASSERT(X) \ 1227 do { \ 1228 } while (0) 1229 1230 #define ASSERTCMP(X, OP, Y) \ 1231 do { \ 1232 } while (0) 1233 1234 #define ASSERTIF(C, X) \ 1235 do { \ 1236 } while (0) 1237 1238 #define ASSERTIFCMP(C, X, OP, Y) \ 1239 do { \ 1240 } while (0) 1241 1242 #endif /* __KDEBUGALL */ 1243