projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
af_rxrpc: Request an ACK for every alternate DATA packet
[linux-2.6-block.git] / net / rxrpc / ar-internal.h
CommitLineData
17926a79
DH		 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
17926a79
DH		 22#define FCRYPT_BSIZE 8
23struct rxrpc_crypt {
24 union {
25 u8 x[FCRYPT_BSIZE];
91e916cf 26 __be32 n[2];
17926a79
DH		 27 };
28} __attribute__((aligned(8)));
29
651350d1
DH		 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)
17926a79
DH		 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;
651350d1 55 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */
17926a79
DH		 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 {
95c96174 86 unsigned int offset; /* offset into buffer of next read */
17926a79
DH		 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
17926a79
DH		 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;
95c96174
ED		 179 unsigned int if_mtu; /* interface MTU for this peer */
180 unsigned int mtu; /* network MTU for this peer */
181 unsigned int maxdata; /* data size (MTU - hdrsize) */
17926a79
DH		 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) */
95c96174
ED		 190 unsigned int rtt_point; /* next entry at which to insert */
191 unsigned int rtt_usage; /* amount of cache actually used */
17926a79
DH		 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 */
4e36a95e 232 u8 security_ix; /* security type */
17926a79
DH		 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 */
95c96174 274 unsigned int call_counter; /* call ID counter */
17926a79
DH		 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 */
4e36a95e
DH		 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 */
17926a79
DH		 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 */
4e36a95e 391 u8 ackr_reason; /* reason to ACK */
17926a79
DH		 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
17926a79
DH		 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/*
651350d1 419 * af_rxrpc.c
17926a79 420 */
651350d1
DH		 421extern atomic_t rxrpc_n_skbs;
422extern __be32 rxrpc_epoch;
423extern atomic_t rxrpc_debug_id;
424extern struct workqueue_struct *rxrpc_workqueue;
17926a79
DH		 425
426/*
427 * ar-accept.c
428 */
c1b1203d
JP		 429void rxrpc_accept_incoming_calls(struct work_struct *);
430struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
431int rxrpc_reject_call(struct rxrpc_sock *);
17926a79
DH		 432
433/*
434 * ar-ack.c
435 */
5873c083
DH		 436extern unsigned rxrpc_requested_ack_delay;
437extern unsigned rxrpc_soft_ack_delay;
438extern unsigned rxrpc_idle_ack_delay;
817913d8
DH		 439extern unsigned rxrpc_rx_window_size;
440extern unsigned rxrpc_rx_mtu;
441extern unsigned rxrpc_rx_jumbo_max;
5873c083 442
c1b1203d
JP		 443void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
444void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
445void rxrpc_process_call(struct work_struct *);
17926a79
DH		 446
447/*
448 * ar-call.c
449 */
5873c083
DH		 450extern unsigned rxrpc_max_call_lifetime;
451extern unsigned rxrpc_dead_call_expiry;
17926a79
DH		 452extern struct kmem_cache *rxrpc_call_jar;
453extern struct list_head rxrpc_calls;
454extern rwlock_t rxrpc_call_lock;
455
c1b1203d
JP		 456struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *,
457 struct rxrpc_transport *,
458 struct rxrpc_conn_bundle *,
459 unsigned long, int, gfp_t);
460struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
461 struct rxrpc_connection *,
462 struct rxrpc_header *, gfp_t);
463struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long);
464void rxrpc_release_call(struct rxrpc_call *);
465void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
466void __rxrpc_put_call(struct rxrpc_call *);
467void __exit rxrpc_destroy_all_calls(void);
17926a79
DH		 468
469/*
470 * ar-connection.c
471 */
5873c083 472extern unsigned rxrpc_connection_expiry;
17926a79
DH		 473extern struct list_head rxrpc_connections;
474extern rwlock_t rxrpc_connection_lock;
475
c1b1203d
JP		 476struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *,
477 struct rxrpc_transport *,
478 struct key *, __be16, gfp_t);
479void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *);
480int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *,
481 struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t);
482void rxrpc_put_connection(struct rxrpc_connection *);
483void __exit rxrpc_destroy_all_connections(void);
484struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *,
485 struct rxrpc_header *);
17926a79
DH		 486extern struct rxrpc_connection *
487rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *,
488 gfp_t);
489
490/*
491 * ar-connevent.c
492 */
c1b1203d
JP		 493void rxrpc_process_connection(struct work_struct *);
494void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
495void rxrpc_reject_packets(struct work_struct *);
17926a79
DH		 496
497/*
498 * ar-error.c
499 */
c1b1203d
JP		 500void rxrpc_UDP_error_report(struct sock *);
501void rxrpc_UDP_error_handler(struct work_struct *);
17926a79
DH		 502
503/*
504 * ar-input.c
505 */
17926a79
DH		 506extern const char *rxrpc_pkts[];
507
c1b1203d
JP		 508void rxrpc_data_ready(struct sock *, int);
509int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool);
510void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
17926a79
DH		 511
512/*
513 * ar-local.c
514 */
515extern rwlock_t rxrpc_local_lock;
5873c083 516
c1b1203d
JP		 517struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *);
518void rxrpc_put_local(struct rxrpc_local *);
519void __exit rxrpc_destroy_all_locals(void);
17926a79
DH		 520
521/*
522 * ar-key.c
523 */
524extern struct key_type key_type_rxrpc;
525extern struct key_type key_type_rxrpc_s;
526
c1b1203d
JP		 527int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
528int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
529int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
530 u32);
17926a79
DH		 531
532/*
533 * ar-output.c
534 */
5873c083 535extern unsigned rxrpc_resend_timeout;
17926a79 536
c1b1203d
JP		 537int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *);
538int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *,
539 struct rxrpc_transport *, struct msghdr *, size_t);
540int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *, struct msghdr *,
541 size_t);
17926a79
DH		 542
543/*
544 * ar-peer.c
545 */
c1b1203d
JP		 546struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t);
547void rxrpc_put_peer(struct rxrpc_peer *);
548struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16);
549void __exit rxrpc_destroy_all_peers(void);
17926a79
DH		 550
551/*
552 * ar-proc.c
553 */
036c2e27
JE		 554extern const char *const rxrpc_call_states[];
555extern const struct file_operations rxrpc_call_seq_fops;
556extern const struct file_operations rxrpc_connection_seq_fops;
17926a79
DH		 557
558/*
559 * ar-recvmsg.c
560 */
c1b1203d
JP		 561void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
562int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *, size_t,
563 int);
17926a79
DH		 564
565/*
566 * ar-security.c
567 */
c1b1203d
JP		 568int rxrpc_register_security(struct rxrpc_security *);
569void rxrpc_unregister_security(struct rxrpc_security *);
570int rxrpc_init_client_conn_security(struct rxrpc_connection *);
571int rxrpc_init_server_conn_security(struct rxrpc_connection *);
572int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, size_t,
573 void *);
574int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, u32 *);
575void rxrpc_clear_conn_security(struct rxrpc_connection *);
17926a79
DH		 576
577/*
578 * ar-skbuff.c
579 */
c1b1203d 580void rxrpc_packet_destructor(struct sk_buff *);
17926a79
DH		 581
582/*
583 * ar-transport.c
584 */
5873c083
DH		 585extern unsigned rxrpc_transport_expiry;
586
c1b1203d
JP		 587struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *,
588 struct rxrpc_peer *, gfp_t);
589void rxrpc_put_transport(struct rxrpc_transport *);
590void __exit rxrpc_destroy_all_transports(void);
591struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *,
592 struct rxrpc_peer *);
17926a79 593
5873c083
DH		 594/*
595 * sysctl.c
596 */
597#ifdef CONFIG_SYSCTL
598extern int __init rxrpc_sysctl_init(void);
599extern void rxrpc_sysctl_exit(void);
600#else
601static inline int __init rxrpc_sysctl_init(void) { return 0; }
602static inline void rxrpc_sysctl_exit(void) {}
603#endif
604
17926a79
DH		 605/*
606 * debug tracing
607 */
95c96174 608extern unsigned int rxrpc_debug;
17926a79
DH		 609
610#define dbgprintk(FMT,...) \
9f389f4b 611 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
17926a79 612
0dc47877
HH		 613#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
614#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
17926a79
DH		 615#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
616#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
617#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
618
619
620#if defined(__KDEBUG)
621#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
622#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
623#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
624#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
625#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
626
627#elif defined(CONFIG_AF_RXRPC_DEBUG)
628#define RXRPC_DEBUG_KENTER 0x01
629#define RXRPC_DEBUG_KLEAVE 0x02
630#define RXRPC_DEBUG_KDEBUG 0x04
631#define RXRPC_DEBUG_KPROTO 0x08
632#define RXRPC_DEBUG_KNET 0x10
633
634#define _enter(FMT,...) \
635do { \
636 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
637 kenter(FMT,##__VA_ARGS__); \
638} while (0)
639
640#define _leave(FMT,...) \
641do { \
642 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
643 kleave(FMT,##__VA_ARGS__); \
644} while (0)
645
646#define _debug(FMT,...) \
647do { \
648 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
649 kdebug(FMT,##__VA_ARGS__); \
650} while (0)
651
652#define _proto(FMT,...) \
653do { \
654 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
655 kproto(FMT,##__VA_ARGS__); \
656} while (0)
657
658#define _net(FMT,...) \
659do { \
660 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
661 knet(FMT,##__VA_ARGS__); \
662} while (0)
663
664#else
12fdff3f
DH		 665#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
666#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
667#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
668#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
669#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
17926a79
DH		 670#endif
671
672/*
673 * debug assertion checking
674 */
675#if 1 // defined(__KDEBUGALL)
676
677#define ASSERT(X) \
678do { \
679 if (unlikely(!(X))) { \
680 printk(KERN_ERR "\n"); \
681 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
682 BUG(); \
683 } \
684} while(0)
685
686#define ASSERTCMP(X, OP, Y) \
687do { \
688 if (unlikely(!((X) OP (Y)))) { \
689 printk(KERN_ERR "\n"); \
690 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
691 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
692 (unsigned long)(X), (unsigned long)(Y)); \
693 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
694 (unsigned long)(X), (unsigned long)(Y)); \
695 BUG(); \
696 } \
697} while(0)
698
699#define ASSERTIF(C, X) \
700do { \
701 if (unlikely((C) && !(X))) { \
702 printk(KERN_ERR "\n"); \
703 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
704 BUG(); \
705 } \
706} while(0)
707
708#define ASSERTIFCMP(C, X, OP, Y) \
709do { \
710 if (unlikely((C) && !((X) OP (Y)))) { \
711 printk(KERN_ERR "\n"); \
712 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
713 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
714 (unsigned long)(X), (unsigned long)(Y)); \
715 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
716 (unsigned long)(X), (unsigned long)(Y)); \
717 BUG(); \
718 } \
719} while(0)
720
721#else
722
723#define ASSERT(X) \
724do { \
725} while(0)
726
727#define ASSERTCMP(X, OP, Y) \
728do { \
729} while(0)
730
731#define ASSERTIF(C, X) \
732do { \
733} while(0)
734
735#define ASSERTIFCMP(C, X, OP, Y) \
736do { \
737} while(0)
738
739#endif /* __KDEBUGALL */
740
741/*
742 * socket buffer accounting / leak finding
743 */
744static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
745{
746 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
747 //atomic_inc(&rxrpc_n_skbs);
748}
749
750#define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)
751
752static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
753{
754 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
755 //atomic_dec(&rxrpc_n_skbs);
756}
757
758#define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)
759
760static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
761{
762 if (skb) {
763 CHECK_SLAB_OKAY(&skb->users);
764 //_net("free skb %p %s [%d]",
765 // skb, fn, atomic_read(&rxrpc_n_skbs));
766 //atomic_dec(&rxrpc_n_skbs);
767 kfree_skb(skb);
768 }
769}
770
771#define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)
772
773static inline void rxrpc_purge_queue(struct sk_buff_head *list)
774{
775 struct sk_buff *skb;
776 while ((skb = skb_dequeue((list))) != NULL)
777 rxrpc_free_skb(skb);
778}
779
17926a79
DH		 780static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f)
781{
782 CHECK_SLAB_OKAY(&local->usage);
783 if (atomic_inc_return(&local->usage) == 1)
784 printk("resurrected (%s)\n", f);
785}
786
787#define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__)
788
789#define rxrpc_get_call(CALL) \
790do { \
791 CHECK_SLAB_OKAY(&(CALL)->usage); \
792 if (atomic_inc_return(&(CALL)->usage) == 1) \
793 BUG(); \
794} while(0)
795
796#define rxrpc_put_call(CALL) \
797do { \
798 __rxrpc_put_call(CALL); \
799} while(0)
Linux 6.x block layer and io_uring tree(s)