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