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Linux 4.8-rc8
[linux/fpc-iii.git] / net / rxrpc / ar-internal.h
blobff83fb1ddd47fead1fc0f7141242991c3a1a1d1c
1 /* AF_RXRPC internal definitions
2 *
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12 #include <linux/atomic.h>
13 #include <linux/seqlock.h>
14 #include <net/sock.h>
15 #include <net/af_rxrpc.h>
16 #include <rxrpc/packet.h>
17
18 #if 0
19 #define CHECK_SLAB_OKAY(X) \
20 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
21 (POISON_FREE << 8 | POISON_FREE))
22 #else
23 #define CHECK_SLAB_OKAY(X) do {} while (0)
24 #endif
25
26 #define FCRYPT_BSIZE 8
27 struct rxrpc_crypt {
28 union {
29 u8 x[FCRYPT_BSIZE];
30 __be32 n[2];
31 };
32 } __attribute__((aligned(8)));
33
34 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
35 #define rxrpc_queue_delayed_work(WS,D) \
36 queue_delayed_work(rxrpc_workqueue, (WS), (D))
37
38 #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor)
39
40 struct rxrpc_connection;
41
42 /*
43 * sk_state for RxRPC sockets
44 */
45 enum {
46 RXRPC_UNBOUND = 0,
47 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
48 RXRPC_CLIENT_BOUND, /* client local address bound */
49 RXRPC_SERVER_BOUND, /* server local address bound */
50 RXRPC_SERVER_LISTENING, /* server listening for connections */
51 RXRPC_CLOSE, /* socket is being closed */
52 };
53
54 /*
55 * RxRPC socket definition
56 */
57 struct rxrpc_sock {
58 /* WARNING: sk has to be the first member */
59 struct sock sk;
60 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */
61 struct rxrpc_local *local; /* local endpoint */
62 struct list_head listen_link; /* link in the local endpoint's listen list */
63 struct list_head secureq; /* calls awaiting connection security clearance */
64 struct list_head acceptq; /* calls awaiting acceptance */
65 struct key *key; /* security for this socket */
66 struct key *securities; /* list of server security descriptors */
67 struct rb_root calls; /* outstanding calls on this socket */
68 unsigned long flags;
69 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
70 rwlock_t call_lock; /* lock for calls */
71 u32 min_sec_level; /* minimum security level */
72 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
73 bool exclusive; /* Exclusive connection for a client socket */
74 sa_family_t family; /* Protocol family created with */
75 struct sockaddr_rxrpc srx; /* local address */
76 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
77 };
78
79 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
80
81 /*
82 * CPU-byteorder normalised Rx packet header.
83 */
84 struct rxrpc_host_header {
85 u32 epoch; /* client boot timestamp */
86 u32 cid; /* connection and channel ID */
87 u32 callNumber; /* call ID (0 for connection-level packets) */
88 u32 seq; /* sequence number of pkt in call stream */
89 u32 serial; /* serial number of pkt sent to network */
90 u8 type; /* packet type */
91 u8 flags; /* packet flags */
92 u8 userStatus; /* app-layer defined status */
93 u8 securityIndex; /* security protocol ID */
94 union {
95 u16 _rsvd; /* reserved */
96 u16 cksum; /* kerberos security checksum */
97 };
98 u16 serviceId; /* service ID */
99 } __packed;
100
101 /*
102 * RxRPC socket buffer private variables
103 * - max 48 bytes (struct sk_buff::cb)
104 */
105 struct rxrpc_skb_priv {
106 struct rxrpc_call *call; /* call with which associated */
107 unsigned long resend_at; /* time in jiffies at which to resend */
108 union {
109 unsigned int offset; /* offset into buffer of next read */
110 int remain; /* amount of space remaining for next write */
111 u32 error; /* network error code */
112 bool need_resend; /* T if needs resending */
113 };
114
115 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
116 };
117
118 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
119
120 enum rxrpc_command {
121 RXRPC_CMD_SEND_DATA, /* send data message */
122 RXRPC_CMD_SEND_ABORT, /* request abort generation */
123 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
124 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
125 };
126
127 /*
128 * RxRPC security module interface
129 */
130 struct rxrpc_security {
131 const char *name; /* name of this service */
132 u8 security_index; /* security type provided */
133
134 /* Initialise a security service */
135 int (*init)(void);
136
137 /* Clean up a security service */
138 void (*exit)(void);
139
140 /* initialise a connection's security */
141 int (*init_connection_security)(struct rxrpc_connection *);
142
143 /* prime a connection's packet security */
144 int (*prime_packet_security)(struct rxrpc_connection *);
145
146 /* impose security on a packet */
147 int (*secure_packet)(struct rxrpc_call *,
148 struct sk_buff *,
149 size_t,
150 void *);
151
152 /* verify the security on a received packet */
153 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *);
154
155 /* issue a challenge */
156 int (*issue_challenge)(struct rxrpc_connection *);
157
158 /* respond to a challenge */
159 int (*respond_to_challenge)(struct rxrpc_connection *,
160 struct sk_buff *,
161 u32 *);
162
163 /* verify a response */
164 int (*verify_response)(struct rxrpc_connection *,
165 struct sk_buff *,
166 u32 *);
167
168 /* clear connection security */
169 void (*clear)(struct rxrpc_connection *);
170 };
171
172 /*
173 * RxRPC local transport endpoint description
174 * - owned by a single AF_RXRPC socket
175 * - pointed to by transport socket struct sk_user_data
176 */
177 struct rxrpc_local {
178 struct rcu_head rcu;
179 atomic_t usage;
180 struct list_head link;
181 struct socket *socket; /* my UDP socket */
182 struct work_struct processor;
183 struct list_head services; /* services listening on this endpoint */
184 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
185 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
186 struct sk_buff_head reject_queue; /* packets awaiting rejection */
187 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
188 struct rb_root client_conns; /* Client connections by socket params */
189 spinlock_t client_conns_lock; /* Lock for client_conns */
190 spinlock_t lock; /* access lock */
191 rwlock_t services_lock; /* lock for services list */
192 int debug_id; /* debug ID for printks */
193 bool dead;
194 struct sockaddr_rxrpc srx; /* local address */
195 };
196
197 /*
198 * RxRPC remote transport endpoint definition
199 * - matched by local endpoint, remote port, address and protocol type
200 */
201 struct rxrpc_peer {
202 struct rcu_head rcu; /* This must be first */
203 atomic_t usage;
204 unsigned long hash_key;
205 struct hlist_node hash_link;
206 struct rxrpc_local *local;
207 struct hlist_head error_targets; /* targets for net error distribution */
208 struct work_struct error_distributor;
209 struct rb_root service_conns; /* Service connections */
210 seqlock_t service_conn_lock;
211 spinlock_t lock; /* access lock */
212 unsigned int if_mtu; /* interface MTU for this peer */
213 unsigned int mtu; /* network MTU for this peer */
214 unsigned int maxdata; /* data size (MTU - hdrsize) */
215 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
216 int debug_id; /* debug ID for printks */
217 int error_report; /* Net (+0) or local (+1000000) to distribute */
218 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
219 struct sockaddr_rxrpc srx; /* remote address */
220
221 /* calculated RTT cache */
222 #define RXRPC_RTT_CACHE_SIZE 32
223 suseconds_t rtt; /* current RTT estimate (in uS) */
224 unsigned int rtt_point; /* next entry at which to insert */
225 unsigned int rtt_usage; /* amount of cache actually used */
226 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
227 };
228
229 /*
230 * Keys for matching a connection.
231 */
232 struct rxrpc_conn_proto {
233 union {
234 struct {
235 u32 epoch; /* epoch of this connection */
236 u32 cid; /* connection ID */
237 };
238 u64 index_key;
239 };
240 };
241
242 struct rxrpc_conn_parameters {
243 struct rxrpc_local *local; /* Representation of local endpoint */
244 struct rxrpc_peer *peer; /* Remote endpoint */
245 struct key *key; /* Security details */
246 bool exclusive; /* T if conn is exclusive */
247 u16 service_id; /* Service ID for this connection */
248 u32 security_level; /* Security level selected */
249 };
250
251 /*
252 * Bits in the connection flags.
253 */
254 enum rxrpc_conn_flag {
255 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
256 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
257 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
258 };
259
260 /*
261 * Events that can be raised upon a connection.
262 */
263 enum rxrpc_conn_event {
264 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
265 };
266
267 /*
268 * The connection protocol state.
269 */
270 enum rxrpc_conn_proto_state {
271 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
272 RXRPC_CONN_CLIENT, /* Client connection */
273 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
274 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
275 RXRPC_CONN_SERVICE, /* Service secured connection */
276 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
277 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
278 RXRPC_CONN_NETWORK_ERROR, /* Conn terminated by network error */
279 RXRPC_CONN__NR_STATES
280 };
281
282 /*
283 * RxRPC connection definition
284 * - matched by { local, peer, epoch, conn_id, direction }
285 * - each connection can only handle four simultaneous calls
286 */
287 struct rxrpc_connection {
288 struct rxrpc_conn_proto proto;
289 struct rxrpc_conn_parameters params;
290
291 spinlock_t channel_lock;
292
293 struct rxrpc_channel {
294 struct rxrpc_call __rcu *call; /* Active call */
295 u32 call_id; /* ID of current call */
296 u32 call_counter; /* Call ID counter */
297 u32 last_call; /* ID of last call */
298 u32 last_result; /* Result of last call (0/abort) */
299 } channels[RXRPC_MAXCALLS];
300 wait_queue_head_t channel_wq; /* queue to wait for channel to become available */
301
302 struct rcu_head rcu;
303 struct work_struct processor; /* connection event processor */
304 union {
305 struct rb_node client_node; /* Node in local->client_conns */
306 struct rb_node service_node; /* Node in peer->service_conns */
307 };
308 struct list_head link; /* link in master connection list */
309 struct sk_buff_head rx_queue; /* received conn-level packets */
310 const struct rxrpc_security *security; /* applied security module */
311 struct key *server_key; /* security for this service */
312 struct crypto_skcipher *cipher; /* encryption handle */
313 struct rxrpc_crypt csum_iv; /* packet checksum base */
314 unsigned long flags;
315 unsigned long events;
316 unsigned long put_time; /* Time at which last put */
317 spinlock_t state_lock; /* state-change lock */
318 atomic_t usage;
319 enum rxrpc_conn_proto_state state : 8; /* current state of connection */
320 u32 local_abort; /* local abort code */
321 u32 remote_abort; /* remote abort code */
322 int error; /* local error incurred */
323 int debug_id; /* debug ID for printks */
324 atomic_t serial; /* packet serial number counter */
325 atomic_t hi_serial; /* highest serial number received */
326 atomic_t avail_chans; /* number of channels available */
327 u8 size_align; /* data size alignment (for security) */
328 u8 header_size; /* rxrpc + security header size */
329 u8 security_size; /* security header size */
330 u32 security_nonce; /* response re-use preventer */
331 u8 security_ix; /* security type */
332 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
333 };
334
335 /*
336 * Flags in call->flags.
337 */
338 enum rxrpc_call_flag {
339 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
340 RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */
341 RXRPC_CALL_RCVD_LAST, /* all packets received */
342 RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */
343 RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */
344 RXRPC_CALL_PROC_BUSY, /* the processor is busy */
345 RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */
346 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
347 RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */
348 };
349
350 /*
351 * Events that can be raised on a call.
352 */
353 enum rxrpc_call_event {
354 RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */
355 RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */
356 RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */
357 RXRPC_CALL_EV_RCVD_ERROR, /* network error received */
358 RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */
359 RXRPC_CALL_EV_ACK, /* need to generate ACK */
360 RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */
361 RXRPC_CALL_EV_ABORT, /* need to generate abort */
362 RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */
363 RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */
364 RXRPC_CALL_EV_RESEND, /* Tx resend required */
365 RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */
366 RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */
367 RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */
368 RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */
369 RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */
370 RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */
371 };
372
373 /*
374 * The states that a call can be in.
375 */
376 enum rxrpc_call_state {
377 RXRPC_CALL_UNINITIALISED,
378 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
379 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
380 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
381 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
382 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
383 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
384 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
385 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
386 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
387 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
388 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
389 RXRPC_CALL_COMPLETE, /* - call completed */
390 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
391 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
392 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
393 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
394 RXRPC_CALL_DEAD, /* - call is dead */
395 NR__RXRPC_CALL_STATES
396 };
397
398 /*
399 * RxRPC call definition
400 * - matched by { connection, call_id }
401 */
402 struct rxrpc_call {
403 struct rcu_head rcu;
404 struct rxrpc_connection *conn; /* connection carrying call */
405 struct rxrpc_sock *socket; /* socket responsible */
406 struct timer_list lifetimer; /* lifetime remaining on call */
407 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
408 struct timer_list ack_timer; /* ACK generation timer */
409 struct timer_list resend_timer; /* Tx resend timer */
410 struct work_struct destroyer; /* call destroyer */
411 struct work_struct processor; /* packet processor and ACK generator */
412 struct list_head link; /* link in master call list */
413 struct hlist_node error_link; /* link in error distribution list */
414 struct list_head accept_link; /* calls awaiting acceptance */
415 struct rb_node sock_node; /* node in socket call tree */
416 struct sk_buff_head rx_queue; /* received packets */
417 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
418 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
419 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
420 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
421 unsigned long user_call_ID; /* user-defined call ID */
422 unsigned long creation_jif; /* time of call creation */
423 unsigned long flags;
424 unsigned long events;
425 spinlock_t lock;
426 rwlock_t state_lock; /* lock for state transition */
427 atomic_t usage;
428 atomic_t skb_count; /* Outstanding packets on this call */
429 atomic_t sequence; /* Tx data packet sequence counter */
430 u32 local_abort; /* local abort code */
431 u32 remote_abort; /* remote abort code */
432 int error_report; /* Network error (ICMP/local transport) */
433 int error; /* Local error incurred */
434 enum rxrpc_call_state state : 8; /* current state of call */
435 int debug_id; /* debug ID for printks */
436 u8 channel; /* connection channel occupied by this call */
437
438 /* transmission-phase ACK management */
439 u8 acks_head; /* offset into window of first entry */
440 u8 acks_tail; /* offset into window of last entry */
441 u8 acks_winsz; /* size of un-ACK'd window */
442 u8 acks_unacked; /* lowest unacked packet in last ACK received */
443 int acks_latest; /* serial number of latest ACK received */
444 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
445 unsigned long *acks_window; /* sent packet window
446 * - elements are pointers with LSB set if ACK'd
447 */
448
449 /* receive-phase ACK management */
450 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
451 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
452 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
453 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
454 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
455 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
456 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
457 u8 ackr_reason; /* reason to ACK */
458 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
459 atomic_t ackr_not_idle; /* number of packets in Rx queue */
460
461 /* received packet records, 1 bit per record */
462 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
463 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
464
465 u8 in_clientflag; /* Copy of conn->in_clientflag */
466 struct rxrpc_local *local; /* Local endpoint. */
467 u32 call_id; /* call ID on connection */
468 u32 cid; /* connection ID plus channel index */
469 u32 epoch; /* epoch of this connection */
470 u16 service_id; /* service ID */
471 };
472
473 /*
474 * locally abort an RxRPC call
475 */
476 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
477 {
478 write_lock_bh(&call->state_lock);
479 if (call->state < RXRPC_CALL_COMPLETE) {
480 call->local_abort = abort_code;
481 call->state = RXRPC_CALL_LOCALLY_ABORTED;
482 set_bit(RXRPC_CALL_EV_ABORT, &call->events);
483 }
484 write_unlock_bh(&call->state_lock);
485 }
486
487 /*
488 * af_rxrpc.c
489 */
490 extern atomic_t rxrpc_n_skbs;
491 extern u32 rxrpc_epoch;
492 extern atomic_t rxrpc_debug_id;
493 extern struct workqueue_struct *rxrpc_workqueue;
494
495 /*
496 * call_accept.c
497 */
498 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
499 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
500 int rxrpc_reject_call(struct rxrpc_sock *);
501
502 /*
503 * call_event.c
504 */
505 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool);
506 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool);
507 void rxrpc_process_call(struct work_struct *);
508
509 /*
510 * call_object.c
511 */
512 extern unsigned int rxrpc_max_call_lifetime;
513 extern unsigned int rxrpc_dead_call_expiry;
514 extern struct kmem_cache *rxrpc_call_jar;
515 extern struct list_head rxrpc_calls;
516 extern rwlock_t rxrpc_call_lock;
517
518 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
519 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
520 struct rxrpc_conn_parameters *,
521 struct sockaddr_rxrpc *,
522 unsigned long, gfp_t);
523 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
524 struct rxrpc_connection *,
525 struct sk_buff *);
526 void rxrpc_release_call(struct rxrpc_call *);
527 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
528 void __rxrpc_put_call(struct rxrpc_call *);
529 void __exit rxrpc_destroy_all_calls(void);
530
531 /*
532 * conn_client.c
533 */
534 extern struct idr rxrpc_client_conn_ids;
535
536 void rxrpc_destroy_client_conn_ids(void);
537 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
538 struct sockaddr_rxrpc *, gfp_t);
539 void rxrpc_unpublish_client_conn(struct rxrpc_connection *);
540
541 /*
542 * conn_event.c
543 */
544 void rxrpc_process_connection(struct work_struct *);
545 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
546 void rxrpc_reject_packets(struct rxrpc_local *);
547
548 /*
549 * conn_object.c
550 */
551 extern unsigned int rxrpc_connection_expiry;
552 extern struct list_head rxrpc_connections;
553 extern rwlock_t rxrpc_connection_lock;
554
555 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
556 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
557 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
558 struct sk_buff *);
559 void __rxrpc_disconnect_call(struct rxrpc_call *);
560 void rxrpc_disconnect_call(struct rxrpc_call *);
561 void rxrpc_put_connection(struct rxrpc_connection *);
562 void __exit rxrpc_destroy_all_connections(void);
563
564 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
565 {
566 return conn->out_clientflag;
567 }
568
569 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
570 {
571 return !rxrpc_conn_is_client(conn);
572 }
573
574 static inline void rxrpc_get_connection(struct rxrpc_connection *conn)
575 {
576 atomic_inc(&conn->usage);
577 }
578
579 static inline
580 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn)
581 {
582 return atomic_inc_not_zero(&conn->usage) ? conn : NULL;
583 }
584
585 static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn)
586 {
587 if (!rxrpc_get_connection_maybe(conn))
588 return false;
589 if (!rxrpc_queue_work(&conn->processor))
590 rxrpc_put_connection(conn);
591 return true;
592 }
593
594 /*
595 * conn_service.c
596 */
597 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
598 struct sk_buff *);
599 struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *,
600 struct sockaddr_rxrpc *,
601 struct sk_buff *);
602 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
603
604 /*
605 * input.c
606 */
607 void rxrpc_data_ready(struct sock *);
608 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool);
609 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
610
611 /*
612 * insecure.c
613 */
614 extern const struct rxrpc_security rxrpc_no_security;
615
616 /*
617 * key.c
618 */
619 extern struct key_type key_type_rxrpc;
620 extern struct key_type key_type_rxrpc_s;
621
622 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
623 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
624 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
625 u32);
626
627 /*
628 * local_event.c
629 */
630 extern void rxrpc_process_local_events(struct rxrpc_local *);
631
632 /*
633 * local_object.c
634 */
635 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
636 void __rxrpc_put_local(struct rxrpc_local *);
637 void __exit rxrpc_destroy_all_locals(void);
638
639 static inline void rxrpc_get_local(struct rxrpc_local *local)
640 {
641 atomic_inc(&local->usage);
642 }
643
644 static inline
645 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
646 {
647 return atomic_inc_not_zero(&local->usage) ? local : NULL;
648 }
649
650 static inline void rxrpc_put_local(struct rxrpc_local *local)
651 {
652 if (local && atomic_dec_and_test(&local->usage))
653 __rxrpc_put_local(local);
654 }
655
656 static inline void rxrpc_queue_local(struct rxrpc_local *local)
657 {
658 rxrpc_queue_work(&local->processor);
659 }
660
661 /*
662 * misc.c
663 */
664 extern unsigned int rxrpc_max_backlog __read_mostly;
665 extern unsigned int rxrpc_requested_ack_delay;
666 extern unsigned int rxrpc_soft_ack_delay;
667 extern unsigned int rxrpc_idle_ack_delay;
668 extern unsigned int rxrpc_rx_window_size;
669 extern unsigned int rxrpc_rx_mtu;
670 extern unsigned int rxrpc_rx_jumbo_max;
671
672 extern const char *const rxrpc_pkts[];
673 extern const s8 rxrpc_ack_priority[];
674
675 extern const char *rxrpc_acks(u8 reason);
676
677 /*
678 * output.c
679 */
680 extern unsigned int rxrpc_resend_timeout;
681
682 int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *);
683 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
684
685 /*
686 * peer_event.c
687 */
688 void rxrpc_error_report(struct sock *);
689 void rxrpc_peer_error_distributor(struct work_struct *);
690
691 /*
692 * peer_object.c
693 */
694 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
695 const struct sockaddr_rxrpc *);
696 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
697 struct sockaddr_rxrpc *, gfp_t);
698 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
699
700 static inline void rxrpc_get_peer(struct rxrpc_peer *peer)
701 {
702 atomic_inc(&peer->usage);
703 }
704
705 static inline
706 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
707 {
708 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
709 }
710
711 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
712 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
713 {
714 if (peer && atomic_dec_and_test(&peer->usage))
715 __rxrpc_put_peer(peer);
716 }
717
718 /*
719 * proc.c
720 */
721 extern const char *const rxrpc_call_states[];
722 extern const struct file_operations rxrpc_call_seq_fops;
723 extern const struct file_operations rxrpc_connection_seq_fops;
724
725 /*
726 * recvmsg.c
727 */
728 void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
729 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
730
731 /*
732 * rxkad.c
733 */
734 #ifdef CONFIG_RXKAD
735 extern const struct rxrpc_security rxkad;
736 #endif
737
738 /*
739 * security.c
740 */
741 int __init rxrpc_init_security(void);
742 void rxrpc_exit_security(void);
743 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
744 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
745
746 /*
747 * skbuff.c
748 */
749 void rxrpc_packet_destructor(struct sk_buff *);
750
751 /*
752 * sysctl.c
753 */
754 #ifdef CONFIG_SYSCTL
755 extern int __init rxrpc_sysctl_init(void);
756 extern void rxrpc_sysctl_exit(void);
757 #else
758 static inline int __init rxrpc_sysctl_init(void) { return 0; }
759 static inline void rxrpc_sysctl_exit(void) {}
760 #endif
761
762 /*
763 * utils.c
764 */
765 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
766
767 /*
768 * debug tracing
769 */
770 extern unsigned int rxrpc_debug;
771
772 #define dbgprintk(FMT,...) \
773 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
774
775 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
776 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
777 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
778 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
779 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
780
781
782 #if defined(__KDEBUG)
783 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
784 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
785 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
786 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
787 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
788
789 #elif defined(CONFIG_AF_RXRPC_DEBUG)
790 #define RXRPC_DEBUG_KENTER 0x01
791 #define RXRPC_DEBUG_KLEAVE 0x02
792 #define RXRPC_DEBUG_KDEBUG 0x04
793 #define RXRPC_DEBUG_KPROTO 0x08
794 #define RXRPC_DEBUG_KNET 0x10
795
796 #define _enter(FMT,...) \
797 do { \
798 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
799 kenter(FMT,##__VA_ARGS__); \
800 } while (0)
801
802 #define _leave(FMT,...) \
803 do { \
804 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
805 kleave(FMT,##__VA_ARGS__); \
806 } while (0)
807
808 #define _debug(FMT,...) \
809 do { \
810 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
811 kdebug(FMT,##__VA_ARGS__); \
812 } while (0)
813
814 #define _proto(FMT,...) \
815 do { \
816 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
817 kproto(FMT,##__VA_ARGS__); \
818 } while (0)
819
820 #define _net(FMT,...) \
821 do { \
822 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
823 knet(FMT,##__VA_ARGS__); \
824 } while (0)
825
826 #else
827 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
828 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
829 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
830 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
831 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
832 #endif
833
834 /*
835 * debug assertion checking
836 */
837 #if 1 // defined(__KDEBUGALL)
838
839 #define ASSERT(X) \
840 do { \
841 if (unlikely(!(X))) { \
842 pr_err("Assertion failed\n"); \
843 BUG(); \
844 } \
845 } while (0)
846
847 #define ASSERTCMP(X, OP, Y) \
848 do { \
849 unsigned long _x = (unsigned long)(X); \
850 unsigned long _y = (unsigned long)(Y); \
851 if (unlikely(!(_x OP _y))) { \
852 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
853 _x, _x, #OP, _y, _y); \
854 BUG(); \
855 } \
856 } while (0)
857
858 #define ASSERTIF(C, X) \
859 do { \
860 if (unlikely((C) && !(X))) { \
861 pr_err("Assertion failed\n"); \
862 BUG(); \
863 } \
864 } while (0)
865
866 #define ASSERTIFCMP(C, X, OP, Y) \
867 do { \
868 unsigned long _x = (unsigned long)(X); \
869 unsigned long _y = (unsigned long)(Y); \
870 if (unlikely((C) && !(_x OP _y))) { \
871 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
872 _x, _x, #OP, _y, _y); \
873 BUG(); \
874 } \
875 } while (0)
876
877 #else
878
879 #define ASSERT(X) \
880 do { \
881 } while (0)
882
883 #define ASSERTCMP(X, OP, Y) \
884 do { \
885 } while (0)
886
887 #define ASSERTIF(C, X) \
888 do { \
889 } while (0)
890
891 #define ASSERTIFCMP(C, X, OP, Y) \
892 do { \
893 } while (0)
894
895 #endif /* __KDEBUGALL */
896
897 /*
898 * socket buffer accounting / leak finding
899 */
900 static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
901 {
902 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
903 //atomic_inc(&rxrpc_n_skbs);
904 }
905
906 #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)
907
908 static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
909 {
910 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
911 //atomic_dec(&rxrpc_n_skbs);
912 }
913
914 #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)
915
916 static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
917 {
918 if (skb) {
919 CHECK_SLAB_OKAY(&skb->users);
920 //_net("free skb %p %s [%d]",
921 // skb, fn, atomic_read(&rxrpc_n_skbs));
922 //atomic_dec(&rxrpc_n_skbs);
923 kfree_skb(skb);
924 }
925 }
926
927 #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)
928
929 static inline void rxrpc_purge_queue(struct sk_buff_head *list)
930 {
931 struct sk_buff *skb;
932 while ((skb = skb_dequeue((list))) != NULL)
933 rxrpc_free_skb(skb);
934 }
935
936 #define rxrpc_get_call(CALL) \
937 do { \
938 CHECK_SLAB_OKAY(&(CALL)->usage); \
939 if (atomic_inc_return(&(CALL)->usage) == 1) \
940 BUG(); \
941 } while (0)
942
943 #define rxrpc_put_call(CALL) \
944 do { \
945 __rxrpc_put_call(CALL); \
946 } while (0)
Linux with added FPC-III support