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diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
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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
22extern atomic_t rxrpc_n_skbs;
23
24#define FCRYPT_BSIZE 8
25struct rxrpc_crypt {
26 union {
27 u8 x[FCRYPT_BSIZE];
28 u32 n[2];
29 };
30} __attribute__((aligned(8)));
31
32extern __be32 rxrpc_epoch; /* local epoch for detecting local-end reset */
33extern atomic_t rxrpc_debug_id; /* current debugging ID */
34
35/*
36 * sk_state for RxRPC sockets
37 */
38enum {
39 RXRPC_UNCONNECTED = 0,
40 RXRPC_CLIENT_BOUND, /* client local address bound */
41 RXRPC_CLIENT_CONNECTED, /* client is connected */
42 RXRPC_SERVER_BOUND, /* server local address bound */
43 RXRPC_SERVER_LISTENING, /* server listening for connections */
44 RXRPC_CLOSE, /* socket is being closed */
45};
46
47/*
48 * RxRPC socket definition
49 */
50struct rxrpc_sock {
51 /* WARNING: sk has to be the first member */
52 struct sock sk;
53 struct rxrpc_local *local; /* local endpoint */
54 struct rxrpc_transport *trans; /* transport handler */
55 struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */
56 struct rxrpc_connection *conn; /* exclusive virtual connection */
57 struct list_head listen_link; /* link in the local endpoint's listen list */
58 struct list_head secureq; /* calls awaiting connection security clearance */
59 struct list_head acceptq; /* calls awaiting acceptance */
60 struct key *key; /* security for this socket */
61 struct key *securities; /* list of server security descriptors */
62 struct rb_root calls; /* outstanding calls on this socket */
63 unsigned long flags;
64#define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */
65 rwlock_t call_lock; /* lock for calls */
66 u32 min_sec_level; /* minimum security level */
67#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
68 struct sockaddr_rxrpc srx; /* local address */
69 sa_family_t proto; /* protocol created with */
70 __be16 service_id; /* service ID of local/remote service */
71};
72
73#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
74
75/*
76 * RxRPC socket buffer private variables
77 * - max 48 bytes (struct sk_buff::cb)
78 */
79struct rxrpc_skb_priv {
80 struct rxrpc_call *call; /* call with which associated */
81 unsigned long resend_at; /* time in jiffies at which to resend */
82 union {
83 unsigned offset; /* offset into buffer of next read */
84 int remain; /* amount of space remaining for next write */
85 u32 error; /* network error code */
86 bool need_resend; /* T if needs resending */
87 };
88
89 struct rxrpc_header hdr; /* RxRPC packet header from this packet */
90};
91
92#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
93
94enum {
95 RXRPC_SKB_MARK_DATA, /* data message */
96 RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */
97 RXRPC_SKB_MARK_BUSY, /* server busy message */
98 RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */
99 RXRPC_SKB_MARK_NET_ERROR, /* network error message */
100 RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */
101 RXRPC_SKB_MARK_NEW_CALL, /* local error message */
102};
103
104enum rxrpc_command {
105 RXRPC_CMD_SEND_DATA, /* send data message */
106 RXRPC_CMD_SEND_ABORT, /* request abort generation */
107 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
108 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
109};
110
111/*
112 * RxRPC security module interface
113 */
114struct rxrpc_security {
115 struct module *owner; /* providing module */
116 struct list_head link; /* link in master list */
117 const char *name; /* name of this service */
118 u8 security_index; /* security type provided */
119
120 /* initialise a connection's security */
121 int (*init_connection_security)(struct rxrpc_connection *);
122
123 /* prime a connection's packet security */
124 void (*prime_packet_security)(struct rxrpc_connection *);
125
126 /* impose security on a packet */
127 int (*secure_packet)(const struct rxrpc_call *,
128 struct sk_buff *,
129 size_t,
130 void *);
131
132 /* verify the security on a received packet */
133 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *,
134 u32 *);
135
136 /* issue a challenge */
137 int (*issue_challenge)(struct rxrpc_connection *);
138
139 /* respond to a challenge */
140 int (*respond_to_challenge)(struct rxrpc_connection *,
141 struct sk_buff *,
142 u32 *);
143
144 /* verify a response */
145 int (*verify_response)(struct rxrpc_connection *,
146 struct sk_buff *,
147 u32 *);
148
149 /* clear connection security */
150 void (*clear)(struct rxrpc_connection *);
151};
152
153/*
154 * RxRPC local transport endpoint definition
155 * - matched by local port, address and protocol type
156 */
157struct rxrpc_local {
158 struct socket *socket; /* my UDP socket */
159 struct work_struct destroyer; /* endpoint destroyer */
160 struct work_struct acceptor; /* incoming call processor */
161 struct work_struct rejecter; /* packet reject writer */
162 struct list_head services; /* services listening on this endpoint */
163 struct list_head link; /* link in endpoint list */
164 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
165 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
166 struct sk_buff_head reject_queue; /* packets awaiting rejection */
167 spinlock_t lock; /* access lock */
168 rwlock_t services_lock; /* lock for services list */
169 atomic_t usage;
170 int debug_id; /* debug ID for printks */
171 volatile char error_rcvd; /* T if received ICMP error outstanding */
172 struct sockaddr_rxrpc srx; /* local address */
173};
174
175/*
176 * RxRPC remote transport endpoint definition
177 * - matched by remote port, address and protocol type
178 * - holds the connection ID counter for connections between the two endpoints
179 */
180struct rxrpc_peer {
181 struct work_struct destroyer; /* peer destroyer */
182 struct list_head link; /* link in master peer list */
183 struct list_head error_targets; /* targets for net error distribution */
184 spinlock_t lock; /* access lock */
185 atomic_t usage;
186 unsigned if_mtu; /* interface MTU for this peer */
187 unsigned mtu; /* network MTU for this peer */
188 unsigned maxdata; /* data size (MTU - hdrsize) */
189 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
190 int debug_id; /* debug ID for printks */
191 int net_error; /* network error distributed */
192 struct sockaddr_rxrpc srx; /* remote address */
193
194 /* calculated RTT cache */
195#define RXRPC_RTT_CACHE_SIZE 32
196 suseconds_t rtt; /* current RTT estimate (in uS) */
197 unsigned rtt_point; /* next entry at which to insert */
198 unsigned rtt_usage; /* amount of cache actually used */
199 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
200};
201
202/*
203 * RxRPC point-to-point transport / connection manager definition
204 * - handles a bundle of connections between two endpoints
205 * - matched by { local, peer }
206 */
207struct rxrpc_transport {
208 struct rxrpc_local *local; /* local transport endpoint */
209 struct rxrpc_peer *peer; /* remote transport endpoint */
210 struct work_struct error_handler; /* network error distributor */
211 struct rb_root bundles; /* client connection bundles on this transport */
212 struct rb_root client_conns; /* client connections on this transport */
213 struct rb_root server_conns; /* server connections on this transport */
214 struct list_head link; /* link in master session list */
215 struct sk_buff_head error_queue; /* error packets awaiting processing */
216 time_t put_time; /* time at which to reap */
217 spinlock_t client_lock; /* client connection allocation lock */
218 rwlock_t conn_lock; /* lock for active/dead connections */
219 atomic_t usage;
220 int debug_id; /* debug ID for printks */
221 unsigned int conn_idcounter; /* connection ID counter (client) */
222};
223
224/*
225 * RxRPC client connection bundle
226 * - matched by { transport, service_id, key }
227 */
228struct rxrpc_conn_bundle {
229 struct rb_node node; /* node in transport's lookup tree */
230 struct list_head unused_conns; /* unused connections in this bundle */
231 struct list_head avail_conns; /* available connections in this bundle */
232 struct list_head busy_conns; /* busy connections in this bundle */
233 struct key *key; /* security for this bundle */
234 wait_queue_head_t chanwait; /* wait for channel to become available */
235 atomic_t usage;
236 int debug_id; /* debug ID for printks */
237 unsigned short num_conns; /* number of connections in this bundle */
238 __be16 service_id; /* service ID */
239 uint8_t security_ix; /* security type */
240};
241
242/*
243 * RxRPC connection definition
244 * - matched by { transport, service_id, conn_id, direction, key }
245 * - each connection can only handle four simultaneous calls
246 */
247struct rxrpc_connection {
248 struct rxrpc_transport *trans; /* transport session */
249 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */
250 struct work_struct processor; /* connection event processor */
251 struct rb_node node; /* node in transport's lookup tree */
252 struct list_head link; /* link in master connection list */
253 struct list_head bundle_link; /* link in bundle */
254 struct rb_root calls; /* calls on this connection */
255 struct sk_buff_head rx_queue; /* received conn-level packets */
256 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */
257 struct rxrpc_security *security; /* applied security module */
258 struct key *key; /* security for this connection (client) */
259 struct key *server_key; /* security for this service */
260 struct crypto_blkcipher *cipher; /* encryption handle */
261 struct rxrpc_crypt csum_iv; /* packet checksum base */
262 unsigned long events;
263#define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */
264 time_t put_time; /* time at which to reap */
265 rwlock_t lock; /* access lock */
266 spinlock_t state_lock; /* state-change lock */
267 atomic_t usage;
268 u32 real_conn_id; /* connection ID (host-endian) */
269 enum { /* current state of connection */
270 RXRPC_CONN_UNUSED, /* - connection not yet attempted */
271 RXRPC_CONN_CLIENT, /* - client connection */
272 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */
273 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */
274 RXRPC_CONN_SERVER, /* - server secured connection */
275 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */
276 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */
277 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */
278 } state;
279 int error; /* error code for local abort */
280 int debug_id; /* debug ID for printks */
281 unsigned call_counter; /* call ID counter */
282 atomic_t serial; /* packet serial number counter */
283 atomic_t hi_serial; /* highest serial number received */
284 u8 avail_calls; /* number of calls available */
285 u8 size_align; /* data size alignment (for security) */
286 u8 header_size; /* rxrpc + security header size */
287 u8 security_size; /* security header size */
288 u32 security_level; /* security level negotiated */
289 u32 security_nonce; /* response re-use preventer */
290
291 /* the following are all in net order */
292 __be32 epoch; /* epoch of this connection */
293 __be32 cid; /* connection ID */
294 __be16 service_id; /* service ID */
295 u8 security_ix; /* security type */
296 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
297 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
298};
299
300/*
301 * RxRPC call definition
302 * - matched by { connection, call_id }
303 */
304struct rxrpc_call {
305 struct rxrpc_connection *conn; /* connection carrying call */
306 struct rxrpc_sock *socket; /* socket responsible */
307 struct timer_list lifetimer; /* lifetime remaining on call */
308 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
309 struct timer_list ack_timer; /* ACK generation timer */
310 struct timer_list resend_timer; /* Tx resend timer */
311 struct work_struct destroyer; /* call destroyer */
312 struct work_struct processor; /* packet processor and ACK generator */
313 struct list_head link; /* link in master call list */
314 struct list_head error_link; /* link in error distribution list */
315 struct list_head accept_link; /* calls awaiting acceptance */
316 struct rb_node sock_node; /* node in socket call tree */
317 struct rb_node conn_node; /* node in connection call tree */
318 struct sk_buff_head rx_queue; /* received packets */
319 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
320 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
321 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
322 unsigned long user_call_ID; /* user-defined call ID */
323 unsigned long creation_jif; /* time of call creation */
324 unsigned long flags;
325#define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */
326#define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */
327#define RXRPC_CALL_RCVD_LAST 2 /* all packets received */
328#define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */
329#define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */
330#define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */
331#define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */
332#define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */
333#define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */
334 unsigned long events;
335#define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */
336#define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */
337#define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */
338#define RXRPC_CALL_RCVD_ERROR 3 /* network error received */
339#define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */
340#define RXRPC_CALL_ACK 5 /* need to generate ACK */
341#define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */
342#define RXRPC_CALL_ABORT 7 /* need to generate abort */
343#define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */
344#define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */
345#define RXRPC_CALL_RESEND 10 /* Tx resend required */
346#define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */
347#define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */
348#define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */
349#define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */
350#define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */
351#define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */
352
353 spinlock_t lock;
354 rwlock_t state_lock; /* lock for state transition */
355 atomic_t usage;
356 atomic_t sequence; /* Tx data packet sequence counter */
357 u32 abort_code; /* local/remote abort code */
358 enum { /* current state of call */
359 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
360 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
361 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
362 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
363 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
364 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
365 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
366 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
367 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
368 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
369 RXRPC_CALL_COMPLETE, /* - call completed */
370 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
371 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
372 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
373 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
374 RXRPC_CALL_DEAD, /* - call is dead */
375 } state;
376 int debug_id; /* debug ID for printks */
377 u8 channel; /* connection channel occupied by this call */
378
379 /* transmission-phase ACK management */
380 uint8_t acks_head; /* offset into window of first entry */
381 uint8_t acks_tail; /* offset into window of last entry */
382 uint8_t acks_winsz; /* size of un-ACK'd window */
383 uint8_t acks_unacked; /* lowest unacked packet in last ACK received */
384 int acks_latest; /* serial number of latest ACK received */
385 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
386 unsigned long *acks_window; /* sent packet window
387 * - elements are pointers with LSB set if ACK'd
388 */
389
390 /* receive-phase ACK management */
391 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
392 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
393 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
394 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
395 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
396 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
397 rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */
398 uint8_t ackr_reason; /* reason to ACK */
399 __be32 ackr_serial; /* serial of packet being ACK'd */
400 atomic_t ackr_not_idle; /* number of packets in Rx queue */
401
402 /* received packet records, 1 bit per record */
403#define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
404 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
405
406 /* the following should all be in net order */
407 __be32 cid; /* connection ID + channel index */
408 __be32 call_id; /* call ID on connection */
409};
410
411/*
412 * RxRPC key for Kerberos (type-2 security)
413 */
414struct rxkad_key {
415 u16 security_index; /* RxRPC header security index */
416 u16 ticket_len; /* length of ticket[] */
417 u32 expiry; /* time at which expires */
418 u32 kvno; /* key version number */
419 u8 session_key[8]; /* DES session key */
420 u8 ticket[0]; /* the encrypted ticket */
421};
422
423struct rxrpc_key_payload {
424 struct rxkad_key k;
425};
426
427/*
428 * locally abort an RxRPC call
429 */
430static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
431{
432 write_lock_bh(&call->state_lock);
433 if (call->state < RXRPC_CALL_COMPLETE) {
434 call->abort_code = abort_code;
435 call->state = RXRPC_CALL_LOCALLY_ABORTED;
436 set_bit(RXRPC_CALL_ABORT, &call->events);
437 }
438 write_unlock_bh(&call->state_lock);
439}
440
441/*
442 * put a packet up for transport-level abort
443 */
444static inline
445void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
446{
447 CHECK_SLAB_OKAY(&local->usage);
448 if (!atomic_inc_not_zero(&local->usage)) {
449 printk("resurrected on reject\n");
450 BUG();
451 }
452 skb_queue_tail(&local->reject_queue, skb);
453 schedule_work(&local->rejecter);
454}
455
456/*
457 * ar-accept.c
458 */
459extern void rxrpc_accept_incoming_calls(struct work_struct *);
460extern int rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
461
462/*
463 * ar-ack.c
464 */
465extern void __rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool);
466extern void rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool);
467extern void rxrpc_process_call(struct work_struct *);
468
469/*
470 * ar-call.c
471 */
472extern struct kmem_cache *rxrpc_call_jar;
473extern struct list_head rxrpc_calls;
474extern rwlock_t rxrpc_call_lock;
475
476extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *,
477 struct rxrpc_transport *,
478 struct rxrpc_conn_bundle *,
479 unsigned long, int, gfp_t);
480extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
481 struct rxrpc_connection *,
482 struct rxrpc_header *, gfp_t);
483extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *,
484 unsigned long);
485extern void rxrpc_release_call(struct rxrpc_call *);
486extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
487extern void __rxrpc_put_call(struct rxrpc_call *);
488extern void __exit rxrpc_destroy_all_calls(void);
489
490/*
491 * ar-connection.c
492 */
493extern struct list_head rxrpc_connections;
494extern rwlock_t rxrpc_connection_lock;
495
496extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *,
497 struct rxrpc_transport *,
498 struct key *,
499 __be16, gfp_t);
500extern void rxrpc_put_bundle(struct rxrpc_transport *,
501 struct rxrpc_conn_bundle *);
502extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *,
503 struct rxrpc_conn_bundle *, struct rxrpc_call *,
504 gfp_t);
505extern void rxrpc_put_connection(struct rxrpc_connection *);
506extern void __exit rxrpc_destroy_all_connections(void);
507extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *,
508 struct rxrpc_header *);
509extern struct rxrpc_connection *
510rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *,
511 gfp_t);
512
513/*
514 * ar-connevent.c
515 */
516extern void rxrpc_process_connection(struct work_struct *);
517extern void rxrpc_reject_packets(struct work_struct *);
518
519/*
520 * ar-error.c
521 */
522extern void rxrpc_UDP_error_report(struct sock *);
523extern void rxrpc_UDP_error_handler(struct work_struct *);
524
525/*
526 * ar-input.c
527 */
528extern unsigned long rxrpc_ack_timeout;
529extern const char *rxrpc_pkts[];
530
531extern void rxrpc_data_ready(struct sock *, int);
532extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool,
533 bool);
534extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
535
536/*
537 * ar-local.c
538 */
539extern rwlock_t rxrpc_local_lock;
540extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *);
541extern void rxrpc_put_local(struct rxrpc_local *);
542extern void __exit rxrpc_destroy_all_locals(void);
543
544/*
545 * ar-key.c
546 */
547extern struct key_type key_type_rxrpc;
548extern struct key_type key_type_rxrpc_s;
549
550extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
551extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
552extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *,
553 time_t, u32);
554
555/*
556 * ar-output.c
557 */
558extern int rxrpc_resend_timeout;
559
560extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *);
561extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *,
562 struct rxrpc_transport *, struct msghdr *,
563 size_t);
564extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *,
565 struct msghdr *, size_t);
566
567/*
568 * ar-peer.c
569 */
570extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t);
571extern void rxrpc_put_peer(struct rxrpc_peer *);
572extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *,
573 __be32, __be16);
574extern void __exit rxrpc_destroy_all_peers(void);
575
576/*
577 * ar-proc.c
578 */
579extern const char *rxrpc_call_states[];
580extern struct file_operations rxrpc_call_seq_fops;
581extern struct file_operations rxrpc_connection_seq_fops;
582
583/*
584 * ar-recvmsg.c
585 */
586extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *,
587 size_t, int);
588
589/*
590 * ar-security.c
591 */
592extern int rxrpc_register_security(struct rxrpc_security *);
593extern void rxrpc_unregister_security(struct rxrpc_security *);
594extern int rxrpc_init_client_conn_security(struct rxrpc_connection *);
595extern int rxrpc_init_server_conn_security(struct rxrpc_connection *);
596extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *,
597 size_t, void *);
598extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *,
599 u32 *);
600extern void rxrpc_clear_conn_security(struct rxrpc_connection *);
601
602/*
603 * ar-skbuff.c
604 */
605extern void rxrpc_packet_destructor(struct sk_buff *);
606
607/*
608 * ar-transport.c
609 */
610extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *,
611 struct rxrpc_peer *,
612 gfp_t);
613extern void rxrpc_put_transport(struct rxrpc_transport *);
614extern void __exit rxrpc_destroy_all_transports(void);
615extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *,
616 struct rxrpc_peer *);
617
618/*
619 * debug tracing
620 */
621extern unsigned rxrpc_debug;
622
623#define dbgprintk(FMT,...) \
624 printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__)
625
626/* make sure we maintain the format strings, even when debugging is disabled */
627static inline __attribute__((format(printf,1,2)))
628void _dbprintk(const char *fmt, ...)
629{
630}
631
632#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
633#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__)
634#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
635#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
636#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
637
638
639#if defined(__KDEBUG)
640#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
641#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
642#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
643#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
644#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
645
646#elif defined(CONFIG_AF_RXRPC_DEBUG)
647#define RXRPC_DEBUG_KENTER 0x01
648#define RXRPC_DEBUG_KLEAVE 0x02
649#define RXRPC_DEBUG_KDEBUG 0x04
650#define RXRPC_DEBUG_KPROTO 0x08
651#define RXRPC_DEBUG_KNET 0x10
652
653#define _enter(FMT,...) \
654do { \
655 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
656 kenter(FMT,##__VA_ARGS__); \
657} while (0)
658
659#define _leave(FMT,...) \
660do { \
661 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
662 kleave(FMT,##__VA_ARGS__); \
663} while (0)
664
665#define _debug(FMT,...) \
666do { \
667 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
668 kdebug(FMT,##__VA_ARGS__); \
669} while (0)
670
671#define _proto(FMT,...) \
672do { \
673 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
674 kproto(FMT,##__VA_ARGS__); \
675} while (0)
676
677#define _net(FMT,...) \
678do { \
679 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
680 knet(FMT,##__VA_ARGS__); \
681} while (0)
682
683#else
684#define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
685#define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__)
686#define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__)
687#define _proto(FMT,...) _dbprintk("### "FMT ,##__VA_ARGS__)
688#define _net(FMT,...) _dbprintk("@@@ "FMT ,##__VA_ARGS__)
689#endif
690
691/*
692 * debug assertion checking
693 */
694#if 1 // defined(__KDEBUGALL)
695
696#define ASSERT(X) \
697do { \
698 if (unlikely(!(X))) { \
699 printk(KERN_ERR "\n"); \
700 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
701 BUG(); \
702 } \
703} while(0)
704
705#define ASSERTCMP(X, OP, Y) \
706do { \
707 if (unlikely(!((X) OP (Y)))) { \
708 printk(KERN_ERR "\n"); \
709 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
710 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
711 (unsigned long)(X), (unsigned long)(Y)); \
712 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
713 (unsigned long)(X), (unsigned long)(Y)); \
714 BUG(); \
715 } \
716} while(0)
717
718#define ASSERTIF(C, X) \
719do { \
720 if (unlikely((C) && !(X))) { \
721 printk(KERN_ERR "\n"); \
722 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
723 BUG(); \
724 } \
725} while(0)
726
727#define ASSERTIFCMP(C, X, OP, Y) \
728do { \
729 if (unlikely((C) && !((X) OP (Y)))) { \
730 printk(KERN_ERR "\n"); \
731 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
732 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
733 (unsigned long)(X), (unsigned long)(Y)); \
734 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
735 (unsigned long)(X), (unsigned long)(Y)); \
736 BUG(); \
737 } \
738} while(0)
739
740#else
741
742#define ASSERT(X) \
743do { \
744} while(0)
745
746#define ASSERTCMP(X, OP, Y) \
747do { \
748} while(0)
749
750#define ASSERTIF(C, X) \
751do { \
752} while(0)
753
754#define ASSERTIFCMP(C, X, OP, Y) \
755do { \
756} while(0)
757
758#endif /* __KDEBUGALL */
759
760/*
761 * socket buffer accounting / leak finding
762 */
763static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
764{
765 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
766 //atomic_inc(&rxrpc_n_skbs);
767}
768
769#define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)
770
771static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
772{
773 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
774 //atomic_dec(&rxrpc_n_skbs);
775}
776
777#define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)
778
779static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
780{
781 if (skb) {
782 CHECK_SLAB_OKAY(&skb->users);
783 //_net("free skb %p %s [%d]",
784 // skb, fn, atomic_read(&rxrpc_n_skbs));
785 //atomic_dec(&rxrpc_n_skbs);
786 kfree_skb(skb);
787 }
788}
789
790#define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)
791
792static inline void rxrpc_purge_queue(struct sk_buff_head *list)
793{
794 struct sk_buff *skb;
795 while ((skb = skb_dequeue((list))) != NULL)
796 rxrpc_free_skb(skb);
797}
798
799static inline void __rxrpc__atomic_inc(atomic_t *v)
800{
801 CHECK_SLAB_OKAY(v);
802 atomic_inc(v);
803}
804
805#define atomic_inc(v) __rxrpc__atomic_inc((v))
806
807static inline void __rxrpc__atomic_dec(atomic_t *v)
808{
809 CHECK_SLAB_OKAY(v);
810 atomic_dec(v);
811}
812
813#define atomic_dec(v) __rxrpc__atomic_dec((v))
814
815static inline int __rxrpc__atomic_dec_and_test(atomic_t *v)
816{
817 CHECK_SLAB_OKAY(v);
818 return atomic_dec_and_test(v);
819}
820
821#define atomic_dec_and_test(v) __rxrpc__atomic_dec_and_test((v))
822
823static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f)
824{
825 CHECK_SLAB_OKAY(&local->usage);
826 if (atomic_inc_return(&local->usage) == 1)
827 printk("resurrected (%s)\n", f);
828}
829
830#define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__)
831
832#define rxrpc_get_call(CALL) \
833do { \
834 CHECK_SLAB_OKAY(&(CALL)->usage); \
835 if (atomic_inc_return(&(CALL)->usage) == 1) \
836 BUG(); \
837} while(0)
838
839#define rxrpc_put_call(CALL) \
840do { \
841 __rxrpc_put_call(CALL); \
842} while(0)
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-21 11:33:47 -0500