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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / net / rxrpc / ar-internal.h
blobb163d845bac06ea6eae9955d84d6d88d1b873ac1
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 <rxrpc/packet.h>
13
14 #define CHECK_SLAB_OKAY(X) do {} while(0)
15
16 #define FCRYPT_BSIZE 8
17 struct rxrpc_crypt {
18 union {
19 u8 x[FCRYPT_BSIZE];
20 __be32 n[2];
21 };
22 } __attribute__((aligned(8)));
23
24 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
25 #define rxrpc_queue_delayed_work(WS,D) \
26 queue_delayed_work(rxrpc_workqueue, (WS), (D))
27
28 #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor)
29 #define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor)
30
31 /*
32 * sk_state for RxRPC sockets
33 */
34 enum {
35 RXRPC_UNCONNECTED = 0,
36 RXRPC_CLIENT_BOUND, /* client local address bound */
37 RXRPC_CLIENT_CONNECTED, /* client is connected */
38 RXRPC_SERVER_BOUND, /* server local address bound */
39 RXRPC_SERVER_LISTENING, /* server listening for connections */
40 RXRPC_CLOSE, /* socket is being closed */
41 };
42
43 /*
44 * RxRPC socket definition
45 */
46 struct rxrpc_sock {
47 /* WARNING: sk has to be the first member */
48 struct sock sk;
49 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */
50 struct rxrpc_local *local; /* local endpoint */
51 struct rxrpc_transport *trans; /* transport handler */
52 struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */
53 struct rxrpc_connection *conn; /* exclusive virtual connection */
54 struct list_head listen_link; /* link in the local endpoint's listen list */
55 struct list_head secureq; /* calls awaiting connection security clearance */
56 struct list_head acceptq; /* calls awaiting acceptance */
57 struct key *key; /* security for this socket */
58 struct key *securities; /* list of server security descriptors */
59 struct rb_root calls; /* outstanding calls on this socket */
60 unsigned long flags;
61 #define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */
62 rwlock_t call_lock; /* lock for calls */
63 u32 min_sec_level; /* minimum security level */
64 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
65 struct sockaddr_rxrpc srx; /* local address */
66 sa_family_t proto; /* protocol created with */
67 __be16 service_id; /* service ID of local/remote service */
68 };
69
70 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
71
72 /*
73 * RxRPC socket buffer private variables
74 * - max 48 bytes (struct sk_buff::cb)
75 */
76 struct rxrpc_skb_priv {
77 struct rxrpc_call *call; /* call with which associated */
78 unsigned long resend_at; /* time in jiffies at which to resend */
79 union {
80 unsigned offset; /* offset into buffer of next read */
81 int remain; /* amount of space remaining for next write */
82 u32 error; /* network error code */
83 bool need_resend; /* T if needs resending */
84 };
85
86 struct rxrpc_header hdr; /* RxRPC packet header from this packet */
87 };
88
89 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
90
91 enum rxrpc_command {
92 RXRPC_CMD_SEND_DATA, /* send data message */
93 RXRPC_CMD_SEND_ABORT, /* request abort generation */
94 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
95 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
96 };
97
98 /*
99 * RxRPC security module interface
100 */
101 struct rxrpc_security {
102 struct module *owner; /* providing module */
103 struct list_head link; /* link in master list */
104 const char *name; /* name of this service */
105 u8 security_index; /* security type provided */
106
107 /* initialise a connection's security */
108 int (*init_connection_security)(struct rxrpc_connection *);
109
110 /* prime a connection's packet security */
111 void (*prime_packet_security)(struct rxrpc_connection *);
112
113 /* impose security on a packet */
114 int (*secure_packet)(const struct rxrpc_call *,
115 struct sk_buff *,
116 size_t,
117 void *);
118
119 /* verify the security on a received packet */
120 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *,
121 u32 *);
122
123 /* issue a challenge */
124 int (*issue_challenge)(struct rxrpc_connection *);
125
126 /* respond to a challenge */
127 int (*respond_to_challenge)(struct rxrpc_connection *,
128 struct sk_buff *,
129 u32 *);
130
131 /* verify a response */
132 int (*verify_response)(struct rxrpc_connection *,
133 struct sk_buff *,
134 u32 *);
135
136 /* clear connection security */
137 void (*clear)(struct rxrpc_connection *);
138 };
139
140 /*
141 * RxRPC local transport endpoint definition
142 * - matched by local port, address and protocol type
143 */
144 struct rxrpc_local {
145 struct socket *socket; /* my UDP socket */
146 struct work_struct destroyer; /* endpoint destroyer */
147 struct work_struct acceptor; /* incoming call processor */
148 struct work_struct rejecter; /* packet reject writer */
149 struct list_head services; /* services listening on this endpoint */
150 struct list_head link; /* link in endpoint list */
151 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
152 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
153 struct sk_buff_head reject_queue; /* packets awaiting rejection */
154 spinlock_t lock; /* access lock */
155 rwlock_t services_lock; /* lock for services list */
156 atomic_t usage;
157 int debug_id; /* debug ID for printks */
158 volatile char error_rcvd; /* T if received ICMP error outstanding */
159 struct sockaddr_rxrpc srx; /* local address */
160 };
161
162 /*
163 * RxRPC remote transport endpoint definition
164 * - matched by remote port, address and protocol type
165 * - holds the connection ID counter for connections between the two endpoints
166 */
167 struct rxrpc_peer {
168 struct work_struct destroyer; /* peer destroyer */
169 struct list_head link; /* link in master peer list */
170 struct list_head error_targets; /* targets for net error distribution */
171 spinlock_t lock; /* access lock */
172 atomic_t usage;
173 unsigned if_mtu; /* interface MTU for this peer */
174 unsigned mtu; /* network MTU for this peer */
175 unsigned maxdata; /* data size (MTU - hdrsize) */
176 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
177 int debug_id; /* debug ID for printks */
178 int net_error; /* network error distributed */
179 struct sockaddr_rxrpc srx; /* remote address */
180
181 /* calculated RTT cache */
182 #define RXRPC_RTT_CACHE_SIZE 32
183 suseconds_t rtt; /* current RTT estimate (in uS) */
184 unsigned rtt_point; /* next entry at which to insert */
185 unsigned rtt_usage; /* amount of cache actually used */
186 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
187 };
188
189 /*
190 * RxRPC point-to-point transport / connection manager definition
191 * - handles a bundle of connections between two endpoints
192 * - matched by { local, peer }
193 */
194 struct rxrpc_transport {
195 struct rxrpc_local *local; /* local transport endpoint */
196 struct rxrpc_peer *peer; /* remote transport endpoint */
197 struct work_struct error_handler; /* network error distributor */
198 struct rb_root bundles; /* client connection bundles on this transport */
199 struct rb_root client_conns; /* client connections on this transport */
200 struct rb_root server_conns; /* server connections on this transport */
201 struct list_head link; /* link in master session list */
202 struct sk_buff_head error_queue; /* error packets awaiting processing */
203 time_t put_time; /* time at which to reap */
204 spinlock_t client_lock; /* client connection allocation lock */
205 rwlock_t conn_lock; /* lock for active/dead connections */
206 atomic_t usage;
207 int debug_id; /* debug ID for printks */
208 unsigned int conn_idcounter; /* connection ID counter (client) */
209 };
210
211 /*
212 * RxRPC client connection bundle
213 * - matched by { transport, service_id, key }
214 */
215 struct rxrpc_conn_bundle {
216 struct rb_node node; /* node in transport's lookup tree */
217 struct list_head unused_conns; /* unused connections in this bundle */
218 struct list_head avail_conns; /* available connections in this bundle */
219 struct list_head busy_conns; /* busy connections in this bundle */
220 struct key *key; /* security for this bundle */
221 wait_queue_head_t chanwait; /* wait for channel to become available */
222 atomic_t usage;
223 int debug_id; /* debug ID for printks */
224 unsigned short num_conns; /* number of connections in this bundle */
225 __be16 service_id; /* service ID */
226 u8 security_ix; /* security type */
227 };
228
229 /*
230 * RxRPC connection definition
231 * - matched by { transport, service_id, conn_id, direction, key }
232 * - each connection can only handle four simultaneous calls
233 */
234 struct rxrpc_connection {
235 struct rxrpc_transport *trans; /* transport session */
236 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */
237 struct work_struct processor; /* connection event processor */
238 struct rb_node node; /* node in transport's lookup tree */
239 struct list_head link; /* link in master connection list */
240 struct list_head bundle_link; /* link in bundle */
241 struct rb_root calls; /* calls on this connection */
242 struct sk_buff_head rx_queue; /* received conn-level packets */
243 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */
244 struct rxrpc_security *security; /* applied security module */
245 struct key *key; /* security for this connection (client) */
246 struct key *server_key; /* security for this service */
247 struct crypto_blkcipher *cipher; /* encryption handle */
248 struct rxrpc_crypt csum_iv; /* packet checksum base */
249 unsigned long events;
250 #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */
251 time_t put_time; /* time at which to reap */
252 rwlock_t lock; /* access lock */
253 spinlock_t state_lock; /* state-change lock */
254 atomic_t usage;
255 u32 real_conn_id; /* connection ID (host-endian) */
256 enum { /* current state of connection */
257 RXRPC_CONN_UNUSED, /* - connection not yet attempted */
258 RXRPC_CONN_CLIENT, /* - client connection */
259 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */
260 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */
261 RXRPC_CONN_SERVER, /* - server secured connection */
262 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */
263 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */
264 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */
265 } state;
266 int error; /* error code for local abort */
267 int debug_id; /* debug ID for printks */
268 unsigned call_counter; /* call ID counter */
269 atomic_t serial; /* packet serial number counter */
270 atomic_t hi_serial; /* highest serial number received */
271 u8 avail_calls; /* number of calls available */
272 u8 size_align; /* data size alignment (for security) */
273 u8 header_size; /* rxrpc + security header size */
274 u8 security_size; /* security header size */
275 u32 security_level; /* security level negotiated */
276 u32 security_nonce; /* response re-use preventer */
277
278 /* the following are all in net order */
279 __be32 epoch; /* epoch of this connection */
280 __be32 cid; /* connection ID */
281 __be16 service_id; /* service ID */
282 u8 security_ix; /* security type */
283 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
284 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
285 };
286
287 /*
288 * RxRPC call definition
289 * - matched by { connection, call_id }
290 */
291 struct rxrpc_call {
292 struct rxrpc_connection *conn; /* connection carrying call */
293 struct rxrpc_sock *socket; /* socket responsible */
294 struct timer_list lifetimer; /* lifetime remaining on call */
295 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
296 struct timer_list ack_timer; /* ACK generation timer */
297 struct timer_list resend_timer; /* Tx resend timer */
298 struct work_struct destroyer; /* call destroyer */
299 struct work_struct processor; /* packet processor and ACK generator */
300 struct list_head link; /* link in master call list */
301 struct list_head error_link; /* link in error distribution list */
302 struct list_head accept_link; /* calls awaiting acceptance */
303 struct rb_node sock_node; /* node in socket call tree */
304 struct rb_node conn_node; /* node in connection call tree */
305 struct sk_buff_head rx_queue; /* received packets */
306 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
307 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
308 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
309 unsigned long user_call_ID; /* user-defined call ID */
310 unsigned long creation_jif; /* time of call creation */
311 unsigned long flags;
312 #define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */
313 #define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */
314 #define RXRPC_CALL_RCVD_LAST 2 /* all packets received */
315 #define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */
316 #define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */
317 #define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */
318 #define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */
319 #define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */
320 #define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */
321 unsigned long events;
322 #define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */
323 #define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */
324 #define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */
325 #define RXRPC_CALL_RCVD_ERROR 3 /* network error received */
326 #define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */
327 #define RXRPC_CALL_ACK 5 /* need to generate ACK */
328 #define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */
329 #define RXRPC_CALL_ABORT 7 /* need to generate abort */
330 #define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */
331 #define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */
332 #define RXRPC_CALL_RESEND 10 /* Tx resend required */
333 #define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */
334 #define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */
335 #define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */
336 #define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */
337 #define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */
338 #define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */
339
340 spinlock_t lock;
341 rwlock_t state_lock; /* lock for state transition */
342 atomic_t usage;
343 atomic_t sequence; /* Tx data packet sequence counter */
344 u32 abort_code; /* local/remote abort code */
345 enum { /* current state of call */
346 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
347 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
348 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
349 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
350 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
351 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
352 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
353 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
354 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
355 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
356 RXRPC_CALL_COMPLETE, /* - call completed */
357 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
358 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
359 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
360 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
361 RXRPC_CALL_DEAD, /* - call is dead */
362 } state;
363 int debug_id; /* debug ID for printks */
364 u8 channel; /* connection channel occupied by this call */
365
366 /* transmission-phase ACK management */
367 u8 acks_head; /* offset into window of first entry */
368 u8 acks_tail; /* offset into window of last entry */
369 u8 acks_winsz; /* size of un-ACK'd window */
370 u8 acks_unacked; /* lowest unacked packet in last ACK received */
371 int acks_latest; /* serial number of latest ACK received */
372 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
373 unsigned long *acks_window; /* sent packet window
374 * - elements are pointers with LSB set if ACK'd
375 */
376
377 /* receive-phase ACK management */
378 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
379 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
380 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
381 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
382 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
383 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
384 rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */
385 u8 ackr_reason; /* reason to ACK */
386 __be32 ackr_serial; /* serial of packet being ACK'd */
387 atomic_t ackr_not_idle; /* number of packets in Rx queue */
388
389 /* received packet records, 1 bit per record */
390 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
391 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
392
393 /* the following should all be in net order */
394 __be32 cid; /* connection ID + channel index */
395 __be32 call_id; /* call ID on connection */
396 };
397
398 /*
399 * locally abort an RxRPC call
400 */
401 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
402 {
403 write_lock_bh(&call->state_lock);
404 if (call->state < RXRPC_CALL_COMPLETE) {
405 call->abort_code = abort_code;
406 call->state = RXRPC_CALL_LOCALLY_ABORTED;
407 set_bit(RXRPC_CALL_ABORT, &call->events);
408 }
409 write_unlock_bh(&call->state_lock);
410 }
411
412 /*
413 * af_rxrpc.c
414 */
415 extern atomic_t rxrpc_n_skbs;
416 extern __be32 rxrpc_epoch;
417 extern atomic_t rxrpc_debug_id;
418 extern struct workqueue_struct *rxrpc_workqueue;
419
420 /*
421 * ar-accept.c
422 */
423 extern void rxrpc_accept_incoming_calls(struct work_struct *);
424 extern struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *,
425 unsigned long);
426 extern int rxrpc_reject_call(struct rxrpc_sock *);
427
428 /*
429 * ar-ack.c
430 */
431 extern void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
432 extern void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
433 extern void rxrpc_process_call(struct work_struct *);
434
435 /*
436 * ar-call.c
437 */
438 extern struct kmem_cache *rxrpc_call_jar;
439 extern struct list_head rxrpc_calls;
440 extern rwlock_t rxrpc_call_lock;
441
442 extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *,
443 struct rxrpc_transport *,
444 struct rxrpc_conn_bundle *,
445 unsigned long, int, gfp_t);
446 extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
447 struct rxrpc_connection *,
448 struct rxrpc_header *, gfp_t);
449 extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *,
450 unsigned long);
451 extern void rxrpc_release_call(struct rxrpc_call *);
452 extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
453 extern void __rxrpc_put_call(struct rxrpc_call *);
454 extern void __exit rxrpc_destroy_all_calls(void);
455
456 /*
457 * ar-connection.c
458 */
459 extern struct list_head rxrpc_connections;
460 extern rwlock_t rxrpc_connection_lock;
461
462 extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *,
463 struct rxrpc_transport *,
464 struct key *,
465 __be16, gfp_t);
466 extern void rxrpc_put_bundle(struct rxrpc_transport *,
467 struct rxrpc_conn_bundle *);
468 extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *,
469 struct rxrpc_conn_bundle *, struct rxrpc_call *,
470 gfp_t);
471 extern void rxrpc_put_connection(struct rxrpc_connection *);
472 extern void __exit rxrpc_destroy_all_connections(void);
473 extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *,
474 struct rxrpc_header *);
475 extern struct rxrpc_connection *
476 rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *,
477 gfp_t);
478
479 /*
480 * ar-connevent.c
481 */
482 extern void rxrpc_process_connection(struct work_struct *);
483 extern void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
484 extern void rxrpc_reject_packets(struct work_struct *);
485
486 /*
487 * ar-error.c
488 */
489 extern void rxrpc_UDP_error_report(struct sock *);
490 extern void rxrpc_UDP_error_handler(struct work_struct *);
491
492 /*
493 * ar-input.c
494 */
495 extern unsigned long rxrpc_ack_timeout;
496 extern const char *rxrpc_pkts[];
497
498 extern void rxrpc_data_ready(struct sock *, int);
499 extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool,
500 bool);
501 extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
502
503 /*
504 * ar-local.c
505 */
506 extern rwlock_t rxrpc_local_lock;
507 extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *);
508 extern void rxrpc_put_local(struct rxrpc_local *);
509 extern void __exit rxrpc_destroy_all_locals(void);
510
511 /*
512 * ar-key.c
513 */
514 extern struct key_type key_type_rxrpc;
515 extern struct key_type key_type_rxrpc_s;
516
517 extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
518 extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
519 extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *,
520 time_t, u32);
521
522 /*
523 * ar-output.c
524 */
525 extern int rxrpc_resend_timeout;
526
527 extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *);
528 extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *,
529 struct rxrpc_transport *, struct msghdr *,
530 size_t);
531 extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *,
532 struct msghdr *, size_t);
533
534 /*
535 * ar-peer.c
536 */
537 extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t);
538 extern void rxrpc_put_peer(struct rxrpc_peer *);
539 extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *,
540 __be32, __be16);
541 extern void __exit rxrpc_destroy_all_peers(void);
542
543 /*
544 * ar-proc.c
545 */
546 extern const char *const rxrpc_call_states[];
547 extern const struct file_operations rxrpc_call_seq_fops;
548 extern const struct file_operations rxrpc_connection_seq_fops;
549
550 /*
551 * ar-recvmsg.c
552 */
553 extern void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
554 extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *,
555 size_t, int);
556
557 /*
558 * ar-security.c
559 */
560 extern int rxrpc_register_security(struct rxrpc_security *);
561 extern void rxrpc_unregister_security(struct rxrpc_security *);
562 extern int rxrpc_init_client_conn_security(struct rxrpc_connection *);
563 extern int rxrpc_init_server_conn_security(struct rxrpc_connection *);
564 extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *,
565 size_t, void *);
566 extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *,
567 u32 *);
568 extern void rxrpc_clear_conn_security(struct rxrpc_connection *);
569
570 /*
571 * ar-skbuff.c
572 */
573 extern void rxrpc_packet_destructor(struct sk_buff *);
574
575 /*
576 * ar-transport.c
577 */
578 extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *,
579 struct rxrpc_peer *,
580 gfp_t);
581 extern void rxrpc_put_transport(struct rxrpc_transport *);
582 extern void __exit rxrpc_destroy_all_transports(void);
583 extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *,
584 struct rxrpc_peer *);
585
586 /*
587 * debug tracing
588 */
589 extern unsigned rxrpc_debug;
590
591 #define dbgprintk(FMT,...) \
592 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
593
594 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
595 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
596 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
597 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
598 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
599
600
601 #if defined(__KDEBUG)
602 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
603 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
604 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
605 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
606 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
607
608 #elif defined(CONFIG_AF_RXRPC_DEBUG)
609 #define RXRPC_DEBUG_KENTER 0x01
610 #define RXRPC_DEBUG_KLEAVE 0x02
611 #define RXRPC_DEBUG_KDEBUG 0x04
612 #define RXRPC_DEBUG_KPROTO 0x08
613 #define RXRPC_DEBUG_KNET 0x10
614
615 #define _enter(FMT,...) \
616 do { \
617 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
618 kenter(FMT,##__VA_ARGS__); \
619 } while (0)
620
621 #define _leave(FMT,...) \
622 do { \
623 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
624 kleave(FMT,##__VA_ARGS__); \
625 } while (0)
626
627 #define _debug(FMT,...) \
628 do { \
629 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
630 kdebug(FMT,##__VA_ARGS__); \
631 } while (0)
632
633 #define _proto(FMT,...) \
634 do { \
635 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
636 kproto(FMT,##__VA_ARGS__); \
637 } while (0)
638
639 #define _net(FMT,...) \
640 do { \
641 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
642 knet(FMT,##__VA_ARGS__); \
643 } while (0)
644
645 #else
646 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
647 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
648 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
649 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
650 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
651 #endif
652
653 /*
654 * debug assertion checking
655 */
656
657 #define ASSERT(X) \
658 do { \
659 if (unlikely(!(X))) { \
660 printk(KERN_ERR "\n"); \
661 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
662 BUG(); \
663 } \
664 } while(0)
665
666 #define ASSERTCMP(X, OP, Y) \
667 do { \
668 if (unlikely(!((X) OP (Y)))) { \
669 printk(KERN_ERR "\n"); \
670 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
671 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
672 (unsigned long)(X), (unsigned long)(Y)); \
673 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
674 (unsigned long)(X), (unsigned long)(Y)); \
675 BUG(); \
676 } \
677 } while(0)
678
679 #define ASSERTIF(C, X) \
680 do { \
681 if (unlikely((C) && !(X))) { \
682 printk(KERN_ERR "\n"); \
683 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
684 BUG(); \
685 } \
686 } while(0)
687
688 #define ASSERTIFCMP(C, X, OP, Y) \
689 do { \
690 if (unlikely((C) && !((X) OP (Y)))) { \
691 printk(KERN_ERR "\n"); \
692 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
693 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
694 (unsigned long)(X), (unsigned long)(Y)); \
695 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
696 (unsigned long)(X), (unsigned long)(Y)); \
697 BUG(); \
698 } \
699 } while(0)
700
701 /*
702 * socket buffer accounting / leak finding
703 */
704 static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
705 {
706 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
707 //atomic_inc(&rxrpc_n_skbs);
708 }
709
710 #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)
711
712 static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
713 {
714 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
715 //atomic_dec(&rxrpc_n_skbs);
716 }
717
718 #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)
719
720 static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
721 {
722 if (skb) {
723 CHECK_SLAB_OKAY(&skb->users);
724 //_net("free skb %p %s [%d]",
725 // skb, fn, atomic_read(&rxrpc_n_skbs));
726 //atomic_dec(&rxrpc_n_skbs);
727 kfree_skb(skb);
728 }
729 }
730
731 #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)
732
733 static inline void rxrpc_purge_queue(struct sk_buff_head *list)
734 {
735 struct sk_buff *skb;
736 while ((skb = skb_dequeue((list))) != NULL)
737 rxrpc_free_skb(skb);
738 }
739
740 static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f)
741 {
742 CHECK_SLAB_OKAY(&local->usage);
743 if (atomic_inc_return(&local->usage) == 1)
744 printk("resurrected (%s)\n", f);
745 }
746
747 #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__)
748
749 #define rxrpc_get_call(CALL) \
750 do { \
751 CHECK_SLAB_OKAY(&(CALL)->usage); \
752 if (atomic_inc_return(&(CALL)->usage) == 1) \
753 BUG(); \
754 } while(0)
755
756 #define rxrpc_put_call(CALL) \
757 do { \
758 __rxrpc_put_call(CALL); \
759 } while(0)
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