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