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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#if 0
15#define CHECK_SLAB_OKAY(X) \
16 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
17 (POISON_FREE << 8 | POISON_FREE))
18#else
19#define CHECK_SLAB_OKAY(X) do {} while(0)
20#endif
21
22#define FCRYPT_BSIZE 8
23struct rxrpc_crypt {
24 union {
25 u8 x[FCRYPT_BSIZE];
26 __be32 n[2];
27 };
28} __attribute__((aligned(8)));
29
30#define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
31#define rxrpc_queue_delayed_work(WS,D) \
32 queue_delayed_work(rxrpc_workqueue, (WS), (D))
33
34#define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor)
35#define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor)
36
37/*
38 * sk_state for RxRPC sockets
39 */
40enum {
41 RXRPC_UNCONNECTED = 0,
42 RXRPC_CLIENT_BOUND, /* client local address bound */
43 RXRPC_CLIENT_CONNECTED, /* client is connected */
44 RXRPC_SERVER_BOUND, /* server local address bound */
45 RXRPC_SERVER_LISTENING, /* server listening for connections */
46 RXRPC_CLOSE, /* socket is being closed */
47};
48
49/*
50 * RxRPC socket definition
51 */
52struct rxrpc_sock {
53 /* WARNING: sk has to be the first member */
54 struct sock sk;
55 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */
56 struct rxrpc_local *local; /* local endpoint */
57 struct rxrpc_transport *trans; /* transport handler */
58 struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */
59 struct rxrpc_connection *conn; /* exclusive virtual connection */
60 struct list_head listen_link; /* link in the local endpoint's listen list */
61 struct list_head secureq; /* calls awaiting connection security clearance */
62 struct list_head acceptq; /* calls awaiting acceptance */
63 struct key *key; /* security for this socket */
64 struct key *securities; /* list of server security descriptors */
65 struct rb_root calls; /* outstanding calls on this socket */
66 unsigned long flags;
67#define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */
68 rwlock_t call_lock; /* lock for calls */
69 u32 min_sec_level; /* minimum security level */
70#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
71 struct sockaddr_rxrpc srx; /* local address */
72 sa_family_t proto; /* protocol created with */
73 __be16 service_id; /* service ID of local/remote service */
74};
75
76#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
77
78/*
79 * RxRPC socket buffer private variables
80 * - max 48 bytes (struct sk_buff::cb)
81 */
82struct rxrpc_skb_priv {
83 struct rxrpc_call *call; /* call with which associated */
84 unsigned long resend_at; /* time in jiffies at which to resend */
85 union {
86 unsigned offset; /* offset into buffer of next read */
87 int remain; /* amount of space remaining for next write */
88 u32 error; /* network error code */
89 bool need_resend; /* T if needs resending */
90 };
91
92 struct rxrpc_header hdr; /* RxRPC packet header from this packet */
93};
94
95#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
96
97enum rxrpc_command {
98 RXRPC_CMD_SEND_DATA, /* send data message */
99 RXRPC_CMD_SEND_ABORT, /* request abort generation */
100 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
101 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
102};
103
104/*
105 * RxRPC security module interface
106 */
107struct rxrpc_security {
108 struct module *owner; /* providing module */
109 struct list_head link; /* link in master list */
110 const char *name; /* name of this service */
111 u8 security_index; /* security type provided */
112
113 /* initialise a connection's security */
114 int (*init_connection_security)(struct rxrpc_connection *);
115
116 /* prime a connection's packet security */
117 void (*prime_packet_security)(struct rxrpc_connection *);
118
119 /* impose security on a packet */
120 int (*secure_packet)(const struct rxrpc_call *,
121 struct sk_buff *,
122 size_t,
123 void *);
124
125 /* verify the security on a received packet */
126 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *,
127 u32 *);
128
129 /* issue a challenge */
130 int (*issue_challenge)(struct rxrpc_connection *);
131
132 /* respond to a challenge */
133 int (*respond_to_challenge)(struct rxrpc_connection *,
134 struct sk_buff *,
135 u32 *);
136
137 /* verify a response */
138 int (*verify_response)(struct rxrpc_connection *,
139 struct sk_buff *,
140 u32 *);
141
142 /* clear connection security */
143 void (*clear)(struct rxrpc_connection *);
144};
145
146/*
147 * RxRPC local transport endpoint definition
148 * - matched by local port, address and protocol type
149 */
150struct rxrpc_local {
151 struct socket *socket; /* my UDP socket */
152 struct work_struct destroyer; /* endpoint destroyer */
153 struct work_struct acceptor; /* incoming call processor */
154 struct work_struct rejecter; /* packet reject writer */
155 struct list_head services; /* services listening on this endpoint */
156 struct list_head link; /* link in endpoint list */
157 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
158 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
159 struct sk_buff_head reject_queue; /* packets awaiting rejection */
160 spinlock_t lock; /* access lock */
161 rwlock_t services_lock; /* lock for services list */
162 atomic_t usage;
163 int debug_id; /* debug ID for printks */
164 volatile char error_rcvd; /* T if received ICMP error outstanding */
165 struct sockaddr_rxrpc srx; /* local address */
166};
167
168/*
169 * RxRPC remote transport endpoint definition
170 * - matched by remote port, address and protocol type
171 * - holds the connection ID counter for connections between the two endpoints
172 */
173struct rxrpc_peer {
174 struct work_struct destroyer; /* peer destroyer */
175 struct list_head link; /* link in master peer list */
176 struct list_head error_targets; /* targets for net error distribution */
177 spinlock_t lock; /* access lock */
178 atomic_t usage;
179 unsigned if_mtu; /* interface MTU for this peer */
180 unsigned mtu; /* network MTU for this peer */
181 unsigned maxdata; /* data size (MTU - hdrsize) */
182 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
183 int debug_id; /* debug ID for printks */
184 int net_error; /* network error distributed */
185 struct sockaddr_rxrpc srx; /* remote address */
186
187 /* calculated RTT cache */
188#define RXRPC_RTT_CACHE_SIZE 32
189 suseconds_t rtt; /* current RTT estimate (in uS) */
190 unsigned rtt_point; /* next entry at which to insert */
191 unsigned rtt_usage; /* amount of cache actually used */
192 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
193};
194
195/*
196 * RxRPC point-to-point transport / connection manager definition
197 * - handles a bundle of connections between two endpoints
198 * - matched by { local, peer }
199 */
200struct rxrpc_transport {
201 struct rxrpc_local *local; /* local transport endpoint */
202 struct rxrpc_peer *peer; /* remote transport endpoint */
203 struct work_struct error_handler; /* network error distributor */
204 struct rb_root bundles; /* client connection bundles on this transport */
205 struct rb_root client_conns; /* client connections on this transport */
206 struct rb_root server_conns; /* server connections on this transport */
207 struct list_head link; /* link in master session list */
208 struct sk_buff_head error_queue; /* error packets awaiting processing */
209 time_t put_time; /* time at which to reap */
210 spinlock_t client_lock; /* client connection allocation lock */
211 rwlock_t conn_lock; /* lock for active/dead connections */
212 atomic_t usage;
213 int debug_id; /* debug ID for printks */
214 unsigned int conn_idcounter; /* connection ID counter (client) */
215};
216
217/*
218 * RxRPC client connection bundle
219 * - matched by { transport, service_id, key }
220 */
221struct rxrpc_conn_bundle {
222 struct rb_node node; /* node in transport's lookup tree */
223 struct list_head unused_conns; /* unused connections in this bundle */
224 struct list_head avail_conns; /* available connections in this bundle */
225 struct list_head busy_conns; /* busy connections in this bundle */
226 struct key *key; /* security for this bundle */
227 wait_queue_head_t chanwait; /* wait for channel to become available */
228 atomic_t usage;
229 int debug_id; /* debug ID for printks */
230 unsigned short num_conns; /* number of connections in this bundle */
231 __be16 service_id; /* service ID */
232 u8 security_ix; /* security type */
233};
234
235/*
236 * RxRPC connection definition
237 * - matched by { transport, service_id, conn_id, direction, key }
238 * - each connection can only handle four simultaneous calls
239 */
240struct rxrpc_connection {
241 struct rxrpc_transport *trans; /* transport session */
242 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */
243 struct work_struct processor; /* connection event processor */
244 struct rb_node node; /* node in transport's lookup tree */
245 struct list_head link; /* link in master connection list */
246 struct list_head bundle_link; /* link in bundle */
247 struct rb_root calls; /* calls on this connection */
248 struct sk_buff_head rx_queue; /* received conn-level packets */
249 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */
250 struct rxrpc_security *security; /* applied security module */
251 struct key *key; /* security for this connection (client) */
252 struct key *server_key; /* security for this service */
253 struct crypto_blkcipher *cipher; /* encryption handle */
254 struct rxrpc_crypt csum_iv; /* packet checksum base */
255 unsigned long events;
256#define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */
257 time_t put_time; /* time at which to reap */
258 rwlock_t lock; /* access lock */
259 spinlock_t state_lock; /* state-change lock */
260 atomic_t usage;
261 u32 real_conn_id; /* connection ID (host-endian) */
262 enum { /* current state of connection */
263 RXRPC_CONN_UNUSED, /* - connection not yet attempted */
264 RXRPC_CONN_CLIENT, /* - client connection */
265 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */
266 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */
267 RXRPC_CONN_SERVER, /* - server secured connection */
268 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */
269 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */
270 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */
271 } state;
272 int error; /* error code for local abort */
273 int debug_id; /* debug ID for printks */
274 unsigned call_counter; /* call ID counter */
275 atomic_t serial; /* packet serial number counter */
276 atomic_t hi_serial; /* highest serial number received */
277 u8 avail_calls; /* number of calls available */
278 u8 size_align; /* data size alignment (for security) */
279 u8 header_size; /* rxrpc + security header size */
280 u8 security_size; /* security header size */
281 u32 security_level; /* security level negotiated */
282 u32 security_nonce; /* response re-use preventer */
283
284 /* the following are all in net order */
285 __be32 epoch; /* epoch of this connection */
286 __be32 cid; /* connection ID */
287 __be16 service_id; /* service ID */
288 u8 security_ix; /* security type */
289 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
290 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
291};
292
293/*
294 * RxRPC call definition
295 * - matched by { connection, call_id }
296 */
297struct rxrpc_call {
298 struct rxrpc_connection *conn; /* connection carrying call */
299 struct rxrpc_sock *socket; /* socket responsible */
300 struct timer_list lifetimer; /* lifetime remaining on call */
301 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
302 struct timer_list ack_timer; /* ACK generation timer */
303 struct timer_list resend_timer; /* Tx resend timer */
304 struct work_struct destroyer; /* call destroyer */
305 struct work_struct processor; /* packet processor and ACK generator */
306 struct list_head link; /* link in master call list */
307 struct list_head error_link; /* link in error distribution list */
308 struct list_head accept_link; /* calls awaiting acceptance */
309 struct rb_node sock_node; /* node in socket call tree */
310 struct rb_node conn_node; /* node in connection call tree */
311 struct sk_buff_head rx_queue; /* received packets */
312 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
313 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
314 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
315 unsigned long user_call_ID; /* user-defined call ID */
316 unsigned long creation_jif; /* time of call creation */
317 unsigned long flags;
318#define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */
319#define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */
320#define RXRPC_CALL_RCVD_LAST 2 /* all packets received */
321#define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */
322#define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */
323#define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */
324#define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */
325#define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */
326#define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */
327 unsigned long events;
328#define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */
329#define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */
330#define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */
331#define RXRPC_CALL_RCVD_ERROR 3 /* network error received */
332#define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */
333#define RXRPC_CALL_ACK 5 /* need to generate ACK */
334#define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */
335#define RXRPC_CALL_ABORT 7 /* need to generate abort */
336#define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */
337#define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */
338#define RXRPC_CALL_RESEND 10 /* Tx resend required */
339#define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */
340#define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */
341#define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */
342#define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */
343#define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */
344#define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */
345
346 spinlock_t lock;
347 rwlock_t state_lock; /* lock for state transition */
348 atomic_t usage;
349 atomic_t sequence; /* Tx data packet sequence counter */
350 u32 abort_code; /* local/remote abort code */
351 enum { /* current state of call */
352 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
353 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
354 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
355 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
356 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
357 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
358 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
359 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
360 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
361 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
362 RXRPC_CALL_COMPLETE, /* - call completed */
363 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
364 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
365 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
366 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
367 RXRPC_CALL_DEAD, /* - call is dead */
368 } state;
369 int debug_id; /* debug ID for printks */
370 u8 channel; /* connection channel occupied by this call */
371
372 /* transmission-phase ACK management */
373 u8 acks_head; /* offset into window of first entry */
374 u8 acks_tail; /* offset into window of last entry */
375 u8 acks_winsz; /* size of un-ACK'd window */
376 u8 acks_unacked; /* lowest unacked packet in last ACK received */
377 int acks_latest; /* serial number of latest ACK received */
378 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
379 unsigned long *acks_window; /* sent packet window
380 * - elements are pointers with LSB set if ACK'd
381 */
382
383 /* receive-phase ACK management */
384 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
385 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
386 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
387 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
388 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
389 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
390 rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */
391 u8 ackr_reason; /* reason to ACK */
392 __be32 ackr_serial; /* serial of packet being ACK'd */
393 atomic_t ackr_not_idle; /* number of packets in Rx queue */
394
395 /* received packet records, 1 bit per record */
396#define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
397 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
398
399 /* the following should all be in net order */
400 __be32 cid; /* connection ID + channel index */
401 __be32 call_id; /* call ID on connection */
402};
403
404/*
405 * locally abort an RxRPC call
406 */
407static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
408{
409 write_lock_bh(&call->state_lock);
410 if (call->state < RXRPC_CALL_COMPLETE) {
411 call->abort_code = abort_code;
412 call->state = RXRPC_CALL_LOCALLY_ABORTED;
413 set_bit(RXRPC_CALL_ABORT, &call->events);
414 }
415 write_unlock_bh(&call->state_lock);
416}
417
418/*
419 * af_rxrpc.c
420 */
421extern atomic_t rxrpc_n_skbs;
422extern __be32 rxrpc_epoch;
423extern atomic_t rxrpc_debug_id;
424extern struct workqueue_struct *rxrpc_workqueue;
425
426/*
427 * ar-accept.c
428 */
429extern void rxrpc_accept_incoming_calls(struct work_struct *);
430extern struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *,
431 unsigned long);
432extern int rxrpc_reject_call(struct rxrpc_sock *);
433
434/*
435 * ar-ack.c
436 */
437extern void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
438extern void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
439extern void rxrpc_process_call(struct work_struct *);
440
441/*
442 * ar-call.c
443 */
444extern struct kmem_cache *rxrpc_call_jar;
445extern struct list_head rxrpc_calls;
446extern rwlock_t rxrpc_call_lock;
447
448extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *,
449 struct rxrpc_transport *,
450 struct rxrpc_conn_bundle *,
451 unsigned long, int, gfp_t);
452extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
453 struct rxrpc_connection *,
454 struct rxrpc_header *, gfp_t);
455extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *,
456 unsigned long);
457extern void rxrpc_release_call(struct rxrpc_call *);
458extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
459extern void __rxrpc_put_call(struct rxrpc_call *);
460extern void __exit rxrpc_destroy_all_calls(void);
461
462/*
463 * ar-connection.c
464 */
465extern struct list_head rxrpc_connections;
466extern rwlock_t rxrpc_connection_lock;
467
468extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *,
469 struct rxrpc_transport *,
470 struct key *,
471 __be16, gfp_t);
472extern void rxrpc_put_bundle(struct rxrpc_transport *,
473 struct rxrpc_conn_bundle *);
474extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *,
475 struct rxrpc_conn_bundle *, struct rxrpc_call *,
476 gfp_t);
477extern void rxrpc_put_connection(struct rxrpc_connection *);
478extern void __exit rxrpc_destroy_all_connections(void);
479extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *,
480 struct rxrpc_header *);
481extern struct rxrpc_connection *
482rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *,
483 gfp_t);
484
485/*
486 * ar-connevent.c
487 */
488extern void rxrpc_process_connection(struct work_struct *);
489extern void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
490extern void rxrpc_reject_packets(struct work_struct *);
491
492/*
493 * ar-error.c
494 */
495extern void rxrpc_UDP_error_report(struct sock *);
496extern void rxrpc_UDP_error_handler(struct work_struct *);
497
498/*
499 * ar-input.c
500 */
501extern unsigned long rxrpc_ack_timeout;
502extern const char *rxrpc_pkts[];
503
504extern void rxrpc_data_ready(struct sock *, int);
505extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool,
506 bool);
507extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
508
509/*
510 * ar-local.c
511 */
512extern rwlock_t rxrpc_local_lock;
513extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *);
514extern void rxrpc_put_local(struct rxrpc_local *);
515extern void __exit rxrpc_destroy_all_locals(void);
516
517/*
518 * ar-key.c
519 */
520extern struct key_type key_type_rxrpc;
521extern struct key_type key_type_rxrpc_s;
522
523extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
524extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
525extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *,
526 time_t, u32);
527
528/*
529 * ar-output.c
530 */
531extern int rxrpc_resend_timeout;
532
533extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *);
534extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *,
535 struct rxrpc_transport *, struct msghdr *,
536 size_t);
537extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *,
538 struct msghdr *, size_t);
539
540/*
541 * ar-peer.c
542 */
543extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t);
544extern void rxrpc_put_peer(struct rxrpc_peer *);
545extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *,
546 __be32, __be16);
547extern void __exit rxrpc_destroy_all_peers(void);
548
549/*
550 * ar-proc.c
551 */
552extern const char *const rxrpc_call_states[];
553extern const struct file_operations rxrpc_call_seq_fops;
554extern const struct file_operations rxrpc_connection_seq_fops;
555
556/*
557 * ar-recvmsg.c
558 */
559extern void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
560extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *,
561 size_t, int);
562
563/*
564 * ar-security.c
565 */
566extern int rxrpc_register_security(struct rxrpc_security *);
567extern void rxrpc_unregister_security(struct rxrpc_security *);
568extern int rxrpc_init_client_conn_security(struct rxrpc_connection *);
569extern int rxrpc_init_server_conn_security(struct rxrpc_connection *);
570extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *,
571 size_t, void *);
572extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *,
573 u32 *);
574extern void rxrpc_clear_conn_security(struct rxrpc_connection *);
575
576/*
577 * ar-skbuff.c
578 */
579extern void rxrpc_packet_destructor(struct sk_buff *);
580
581/*
582 * ar-transport.c
583 */
584extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *,
585 struct rxrpc_peer *,
586 gfp_t);
587extern void rxrpc_put_transport(struct rxrpc_transport *);
588extern void __exit rxrpc_destroy_all_transports(void);
589extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *,
590 struct rxrpc_peer *);
591
592/*
593 * debug tracing
594 */
595extern unsigned rxrpc_debug;
596
597#define dbgprintk(FMT,...) \
598 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
599
600/* make sure we maintain the format strings, even when debugging is disabled */
601static inline __attribute__((format(printf,1,2)))
602void _dbprintk(const char *fmt, ...)
603{
604}
605
606#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
607#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
608#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
609#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
610#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
611
612
613#if defined(__KDEBUG)
614#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
615#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
616#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
617#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
618#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
619
620#elif defined(CONFIG_AF_RXRPC_DEBUG)
621#define RXRPC_DEBUG_KENTER 0x01
622#define RXRPC_DEBUG_KLEAVE 0x02
623#define RXRPC_DEBUG_KDEBUG 0x04
624#define RXRPC_DEBUG_KPROTO 0x08
625#define RXRPC_DEBUG_KNET 0x10
626
627#define _enter(FMT,...) \
628do { \
629 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
630 kenter(FMT,##__VA_ARGS__); \
631} while (0)
632
633#define _leave(FMT,...) \
634do { \
635 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
636 kleave(FMT,##__VA_ARGS__); \
637} while (0)
638
639#define _debug(FMT,...) \
640do { \
641 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
642 kdebug(FMT,##__VA_ARGS__); \
643} while (0)
644
645#define _proto(FMT,...) \
646do { \
647 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
648 kproto(FMT,##__VA_ARGS__); \
649} while (0)
650
651#define _net(FMT,...) \
652do { \
653 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
654 knet(FMT,##__VA_ARGS__); \
655} while (0)
656
657#else
658#define _enter(FMT,...) _dbprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
659#define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
660#define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__)
661#define _proto(FMT,...) _dbprintk("### "FMT ,##__VA_ARGS__)
662#define _net(FMT,...) _dbprintk("@@@ "FMT ,##__VA_ARGS__)
663#endif
664
665/*
666 * debug assertion checking
667 */
668#if 1 // defined(__KDEBUGALL)
669
670#define ASSERT(X) \
671do { \
672 if (unlikely(!(X))) { \
673 printk(KERN_ERR "\n"); \
674 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
675 BUG(); \
676 } \
677} while(0)
678
679#define ASSERTCMP(X, OP, Y) \
680do { \
681 if (unlikely(!((X) OP (Y)))) { \
682 printk(KERN_ERR "\n"); \
683 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
684 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
685 (unsigned long)(X), (unsigned long)(Y)); \
686 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
687 (unsigned long)(X), (unsigned long)(Y)); \
688 BUG(); \
689 } \
690} while(0)
691
692#define ASSERTIF(C, X) \
693do { \
694 if (unlikely((C) && !(X))) { \
695 printk(KERN_ERR "\n"); \
696 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
697 BUG(); \
698 } \
699} while(0)
700
701#define ASSERTIFCMP(C, X, OP, Y) \
702do { \
703 if (unlikely((C) && !((X) OP (Y)))) { \
704 printk(KERN_ERR "\n"); \
705 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
706 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
707 (unsigned long)(X), (unsigned long)(Y)); \
708 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
709 (unsigned long)(X), (unsigned long)(Y)); \
710 BUG(); \
711 } \
712} while(0)
713
714#else
715
716#define ASSERT(X) \
717do { \
718} while(0)
719
720#define ASSERTCMP(X, OP, Y) \
721do { \
722} while(0)
723
724#define ASSERTIF(C, X) \
725do { \
726} while(0)
727
728#define ASSERTIFCMP(C, X, OP, Y) \
729do { \
730} while(0)
731
732#endif /* __KDEBUGALL */
733
734/*
735 * socket buffer accounting / leak finding
736 */
737static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
738{
739 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
740 //atomic_inc(&rxrpc_n_skbs);
741}
742
743#define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)
744
745static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
746{
747 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
748 //atomic_dec(&rxrpc_n_skbs);
749}
750
751#define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)
752
753static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
754{
755 if (skb) {
756 CHECK_SLAB_OKAY(&skb->users);
757 //_net("free skb %p %s [%d]",
758 // skb, fn, atomic_read(&rxrpc_n_skbs));
759 //atomic_dec(&rxrpc_n_skbs);
760 kfree_skb(skb);
761 }
762}
763
764#define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)
765
766static inline void rxrpc_purge_queue(struct sk_buff_head *list)
767{
768 struct sk_buff *skb;
769 while ((skb = skb_dequeue((list))) != NULL)
770 rxrpc_free_skb(skb);
771}
772
773static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f)
774{
775 CHECK_SLAB_OKAY(&local->usage);
776 if (atomic_inc_return(&local->usage) == 1)
777 printk("resurrected (%s)\n", f);
778}
779
780#define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__)
781
782#define rxrpc_get_call(CALL) \
783do { \
784 CHECK_SLAB_OKAY(&(CALL)->usage); \
785 if (atomic_inc_return(&(CALL)->usage) == 1) \
786 BUG(); \
787} while(0)
788
789#define rxrpc_put_call(CALL) \
790do { \
791 __rxrpc_put_call(CALL); \
792} while(0)