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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
[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 */
44ba0698 155 struct work_struct event_processor; /* endpoint event processor */
17926a79
DH		 156 struct list_head services; /* services listening on this endpoint */
157 struct list_head link; /* link in endpoint list */
158 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
159 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
160 struct sk_buff_head reject_queue; /* packets awaiting rejection */
44ba0698 161 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
17926a79
DH		 162 spinlock_t lock; /* access lock */
163 rwlock_t services_lock; /* lock for services list */
164 atomic_t usage;
165 int debug_id; /* debug ID for printks */
166 volatile char error_rcvd; /* T if received ICMP error outstanding */
167 struct sockaddr_rxrpc srx; /* local address */
168};
169
170/*
171 * RxRPC remote transport endpoint definition
172 * - matched by remote port, address and protocol type
173 * - holds the connection ID counter for connections between the two endpoints
174 */
175struct rxrpc_peer {
176 struct work_struct destroyer; /* peer destroyer */
177 struct list_head link; /* link in master peer list */
178 struct list_head error_targets; /* targets for net error distribution */
179 spinlock_t lock; /* access lock */
180 atomic_t usage;
95c96174
ED		 181 unsigned int if_mtu; /* interface MTU for this peer */
182 unsigned int mtu; /* network MTU for this peer */
183 unsigned int maxdata; /* data size (MTU - hdrsize) */
17926a79
DH		 184 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
185 int debug_id; /* debug ID for printks */
186 int net_error; /* network error distributed */
187 struct sockaddr_rxrpc srx; /* remote address */
188
189 /* calculated RTT cache */
190#define RXRPC_RTT_CACHE_SIZE 32
191 suseconds_t rtt; /* current RTT estimate (in uS) */
95c96174
ED		 192 unsigned int rtt_point; /* next entry at which to insert */
193 unsigned int rtt_usage; /* amount of cache actually used */
17926a79
DH		 194 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
195};
196
197/*
198 * RxRPC point-to-point transport / connection manager definition
199 * - handles a bundle of connections between two endpoints
200 * - matched by { local, peer }
201 */
202struct rxrpc_transport {
203 struct rxrpc_local *local; /* local transport endpoint */
204 struct rxrpc_peer *peer; /* remote transport endpoint */
205 struct work_struct error_handler; /* network error distributor */
206 struct rb_root bundles; /* client connection bundles on this transport */
207 struct rb_root client_conns; /* client connections on this transport */
208 struct rb_root server_conns; /* server connections on this transport */
209 struct list_head link; /* link in master session list */
210 struct sk_buff_head error_queue; /* error packets awaiting processing */
211 time_t put_time; /* time at which to reap */
212 spinlock_t client_lock; /* client connection allocation lock */
213 rwlock_t conn_lock; /* lock for active/dead connections */
214 atomic_t usage;
215 int debug_id; /* debug ID for printks */
216 unsigned int conn_idcounter; /* connection ID counter (client) */
217};
218
219/*
220 * RxRPC client connection bundle
221 * - matched by { transport, service_id, key }
222 */
223struct rxrpc_conn_bundle {
224 struct rb_node node; /* node in transport's lookup tree */
225 struct list_head unused_conns; /* unused connections in this bundle */
226 struct list_head avail_conns; /* available connections in this bundle */
227 struct list_head busy_conns; /* busy connections in this bundle */
228 struct key *key; /* security for this bundle */
229 wait_queue_head_t chanwait; /* wait for channel to become available */
230 atomic_t usage;
231 int debug_id; /* debug ID for printks */
232 unsigned short num_conns; /* number of connections in this bundle */
233 __be16 service_id; /* service ID */
4e36a95e 234 u8 security_ix; /* security type */
17926a79
DH		 235};
236
237/*
238 * RxRPC connection definition
239 * - matched by { transport, service_id, conn_id, direction, key }
240 * - each connection can only handle four simultaneous calls
241 */
242struct rxrpc_connection {
243 struct rxrpc_transport *trans; /* transport session */
244 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */
245 struct work_struct processor; /* connection event processor */
246 struct rb_node node; /* node in transport's lookup tree */
247 struct list_head link; /* link in master connection list */
248 struct list_head bundle_link; /* link in bundle */
249 struct rb_root calls; /* calls on this connection */
250 struct sk_buff_head rx_queue; /* received conn-level packets */
251 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */
252 struct rxrpc_security *security; /* applied security module */
253 struct key *key; /* security for this connection (client) */
254 struct key *server_key; /* security for this service */
255 struct crypto_blkcipher *cipher; /* encryption handle */
256 struct rxrpc_crypt csum_iv; /* packet checksum base */
257 unsigned long events;
258#define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */
259 time_t put_time; /* time at which to reap */
260 rwlock_t lock; /* access lock */
261 spinlock_t state_lock; /* state-change lock */
262 atomic_t usage;
263 u32 real_conn_id; /* connection ID (host-endian) */
264 enum { /* current state of connection */
265 RXRPC_CONN_UNUSED, /* - connection not yet attempted */
266 RXRPC_CONN_CLIENT, /* - client connection */
267 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */
268 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */
269 RXRPC_CONN_SERVER, /* - server secured connection */
270 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */
271 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */
272 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */
273 } state;
274 int error; /* error code for local abort */
275 int debug_id; /* debug ID for printks */
95c96174 276 unsigned int call_counter; /* call ID counter */
17926a79
DH		 277 atomic_t serial; /* packet serial number counter */
278 atomic_t hi_serial; /* highest serial number received */
279 u8 avail_calls; /* number of calls available */
280 u8 size_align; /* data size alignment (for security) */
281 u8 header_size; /* rxrpc + security header size */
282 u8 security_size; /* security header size */
283 u32 security_level; /* security level negotiated */
284 u32 security_nonce; /* response re-use preventer */
285
286 /* the following are all in net order */
287 __be32 epoch; /* epoch of this connection */
288 __be32 cid; /* connection ID */
289 __be16 service_id; /* service ID */
290 u8 security_ix; /* security type */
291 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
292 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
293};
294
295/*
296 * RxRPC call definition
297 * - matched by { connection, call_id }
298 */
299struct rxrpc_call {
300 struct rxrpc_connection *conn; /* connection carrying call */
301 struct rxrpc_sock *socket; /* socket responsible */
302 struct timer_list lifetimer; /* lifetime remaining on call */
303 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
304 struct timer_list ack_timer; /* ACK generation timer */
305 struct timer_list resend_timer; /* Tx resend timer */
306 struct work_struct destroyer; /* call destroyer */
307 struct work_struct processor; /* packet processor and ACK generator */
308 struct list_head link; /* link in master call list */
309 struct list_head error_link; /* link in error distribution list */
310 struct list_head accept_link; /* calls awaiting acceptance */
311 struct rb_node sock_node; /* node in socket call tree */
312 struct rb_node conn_node; /* node in connection call tree */
313 struct sk_buff_head rx_queue; /* received packets */
314 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
315 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
316 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
317 unsigned long user_call_ID; /* user-defined call ID */
318 unsigned long creation_jif; /* time of call creation */
319 unsigned long flags;
320#define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */
321#define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */
322#define RXRPC_CALL_RCVD_LAST 2 /* all packets received */
323#define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */
324#define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */
325#define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */
326#define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */
327#define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */
328#define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */
329 unsigned long events;
330#define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */
331#define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */
332#define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */
333#define RXRPC_CALL_RCVD_ERROR 3 /* network error received */
334#define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */
335#define RXRPC_CALL_ACK 5 /* need to generate ACK */
336#define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */
337#define RXRPC_CALL_ABORT 7 /* need to generate abort */
338#define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */
339#define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */
340#define RXRPC_CALL_RESEND 10 /* Tx resend required */
341#define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */
342#define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */
343#define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */
344#define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */
345#define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */
346#define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */
347
348 spinlock_t lock;
349 rwlock_t state_lock; /* lock for state transition */
350 atomic_t usage;
351 atomic_t sequence; /* Tx data packet sequence counter */
352 u32 abort_code; /* local/remote abort code */
353 enum { /* current state of call */
354 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
355 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
356 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
357 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
358 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
359 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
360 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
361 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
362 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
363 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
364 RXRPC_CALL_COMPLETE, /* - call completed */
365 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
366 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
367 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
368 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
369 RXRPC_CALL_DEAD, /* - call is dead */
370 } state;
371 int debug_id; /* debug ID for printks */
372 u8 channel; /* connection channel occupied by this call */
373
374 /* transmission-phase ACK management */
4e36a95e
DH		 375 u8 acks_head; /* offset into window of first entry */
376 u8 acks_tail; /* offset into window of last entry */
377 u8 acks_winsz; /* size of un-ACK'd window */
378 u8 acks_unacked; /* lowest unacked packet in last ACK received */
17926a79
DH		 379 int acks_latest; /* serial number of latest ACK received */
380 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
381 unsigned long *acks_window; /* sent packet window
382 * - elements are pointers with LSB set if ACK'd
383 */
384
385 /* receive-phase ACK management */
386 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
387 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
388 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
389 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
390 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
391 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
392 rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */
4e36a95e 393 u8 ackr_reason; /* reason to ACK */
17926a79
DH		 394 __be32 ackr_serial; /* serial of packet being ACK'd */
395 atomic_t ackr_not_idle; /* number of packets in Rx queue */
396
397 /* received packet records, 1 bit per record */
398#define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
399 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
400
7727640c
TS		 401 struct hlist_node hash_node;
402 unsigned long hash_key; /* Full hash key */
403 u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */
404 struct rxrpc_local *local; /* Local endpoint. Used for hashing. */
405 sa_family_t proto; /* Frame protocol */
17926a79
DH		 406 /* the following should all be in net order */
407 __be32 cid; /* connection ID + channel index */
408 __be32 call_id; /* call ID on connection */
7727640c
TS		 409 __be32 epoch; /* epoch of this connection */
410 __be16 service_id; /* service ID */
411 union { /* Peer IP address for hashing */
412 __be32 ipv4_addr;
413 __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */
414 } peer_ip;
17926a79
DH		 415};
416
17926a79
DH		 417/*
418 * locally abort an RxRPC call
419 */
420static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
421{
422 write_lock_bh(&call->state_lock);
423 if (call->state < RXRPC_CALL_COMPLETE) {
424 call->abort_code = abort_code;
425 call->state = RXRPC_CALL_LOCALLY_ABORTED;
426 set_bit(RXRPC_CALL_ABORT, &call->events);
427 }
428 write_unlock_bh(&call->state_lock);
429}
430
431/*
651350d1 432 * af_rxrpc.c
17926a79 433 */
651350d1
DH		 434extern atomic_t rxrpc_n_skbs;
435extern __be32 rxrpc_epoch;
436extern atomic_t rxrpc_debug_id;
437extern struct workqueue_struct *rxrpc_workqueue;
17926a79
DH		 438
439/*
440 * ar-accept.c
441 */
c1b1203d
JP		 442void rxrpc_accept_incoming_calls(struct work_struct *);
443struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
444int rxrpc_reject_call(struct rxrpc_sock *);
17926a79
DH		 445
446/*
447 * ar-ack.c
448 */
5873c083
DH		 449extern unsigned rxrpc_requested_ack_delay;
450extern unsigned rxrpc_soft_ack_delay;
451extern unsigned rxrpc_idle_ack_delay;
817913d8
DH		 452extern unsigned rxrpc_rx_window_size;
453extern unsigned rxrpc_rx_mtu;
454extern unsigned rxrpc_rx_jumbo_max;
5873c083 455
c1b1203d
JP		 456void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
457void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool);
458void rxrpc_process_call(struct work_struct *);
17926a79
DH		 459
460/*
461 * ar-call.c
462 */
5873c083
DH		 463extern unsigned rxrpc_max_call_lifetime;
464extern unsigned rxrpc_dead_call_expiry;
17926a79
DH		 465extern struct kmem_cache *rxrpc_call_jar;
466extern struct list_head rxrpc_calls;
467extern rwlock_t rxrpc_call_lock;
468
7727640c
TS		 469struct rxrpc_call *rxrpc_find_call_hash(u8, __be32, __be32, __be32,
470 __be16, void *, sa_family_t, const u8 *);
c1b1203d
JP		 471struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *,
472 struct rxrpc_transport *,
473 struct rxrpc_conn_bundle *,
474 unsigned long, int, gfp_t);
475struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
476 struct rxrpc_connection *,
477 struct rxrpc_header *, gfp_t);
478struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long);
479void rxrpc_release_call(struct rxrpc_call *);
480void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
481void __rxrpc_put_call(struct rxrpc_call *);
482void __exit rxrpc_destroy_all_calls(void);
17926a79
DH		 483
484/*
485 * ar-connection.c
486 */
5873c083 487extern unsigned rxrpc_connection_expiry;
17926a79
DH		 488extern struct list_head rxrpc_connections;
489extern rwlock_t rxrpc_connection_lock;
490
c1b1203d
JP		 491struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *,
492 struct rxrpc_transport *,
493 struct key *, __be16, gfp_t);
494void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *);
495int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *,
496 struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t);
497void rxrpc_put_connection(struct rxrpc_connection *);
498void __exit rxrpc_destroy_all_connections(void);
499struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *,
500 struct rxrpc_header *);
17926a79
DH		 501extern struct rxrpc_connection *
502rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *,
503 gfp_t);
504
505/*
506 * ar-connevent.c
507 */
c1b1203d
JP		 508void rxrpc_process_connection(struct work_struct *);
509void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
510void rxrpc_reject_packets(struct work_struct *);
17926a79
DH		 511
512/*
513 * ar-error.c
514 */
c1b1203d
JP		 515void rxrpc_UDP_error_report(struct sock *);
516void rxrpc_UDP_error_handler(struct work_struct *);
17926a79
DH		 517
518/*
519 * ar-input.c
520 */
17926a79
DH		 521extern const char *rxrpc_pkts[];
522
676d2369 523void rxrpc_data_ready(struct sock *);
c1b1203d
JP		 524int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool);
525void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
17926a79
DH		 526
527/*
528 * ar-local.c
529 */
530extern rwlock_t rxrpc_local_lock;
5873c083 531
c1b1203d
JP		 532struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *);
533void rxrpc_put_local(struct rxrpc_local *);
534void __exit rxrpc_destroy_all_locals(void);
17926a79
DH		 535
536/*
537 * ar-key.c
538 */
539extern struct key_type key_type_rxrpc;
540extern struct key_type key_type_rxrpc_s;
541
c1b1203d
JP		 542int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
543int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
544int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
545 u32);
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DH		 546
547/*
548 * ar-output.c
549 */
5873c083 550extern unsigned rxrpc_resend_timeout;
17926a79 551
c1b1203d 552int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *);
1b784140
YX		 553int rxrpc_client_sendmsg(struct rxrpc_sock *, struct rxrpc_transport *,
554 struct msghdr *, size_t);
555int rxrpc_server_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
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DH		 556
557/*
558 * ar-peer.c
559 */
c1b1203d
JP		 560struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t);
561void rxrpc_put_peer(struct rxrpc_peer *);
562struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16);
563void __exit rxrpc_destroy_all_peers(void);
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DH		 564
565/*
566 * ar-proc.c
567 */
036c2e27
JE		 568extern const char *const rxrpc_call_states[];
569extern const struct file_operations rxrpc_call_seq_fops;
570extern const struct file_operations rxrpc_connection_seq_fops;
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DH		 571
572/*
573 * ar-recvmsg.c
574 */
c1b1203d 575void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
1b784140 576int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
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DH		 577
578/*
579 * ar-security.c
580 */
c1b1203d
JP		 581int rxrpc_register_security(struct rxrpc_security *);
582void rxrpc_unregister_security(struct rxrpc_security *);
583int rxrpc_init_client_conn_security(struct rxrpc_connection *);
584int rxrpc_init_server_conn_security(struct rxrpc_connection *);
585int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, size_t,
586 void *);
587int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, u32 *);
588void rxrpc_clear_conn_security(struct rxrpc_connection *);
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DH		 589
590/*
591 * ar-skbuff.c
592 */
c1b1203d 593void rxrpc_packet_destructor(struct sk_buff *);
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DH		 594
595/*
596 * ar-transport.c
597 */
5873c083
DH		 598extern unsigned rxrpc_transport_expiry;
599
c1b1203d
JP		 600struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *,
601 struct rxrpc_peer *, gfp_t);
602void rxrpc_put_transport(struct rxrpc_transport *);
603void __exit rxrpc_destroy_all_transports(void);
604struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *,
605 struct rxrpc_peer *);
17926a79 606
5873c083
DH		 607/*
608 * sysctl.c
609 */
610#ifdef CONFIG_SYSCTL
611extern int __init rxrpc_sysctl_init(void);
612extern void rxrpc_sysctl_exit(void);
613#else
614static inline int __init rxrpc_sysctl_init(void) { return 0; }
615static inline void rxrpc_sysctl_exit(void) {}
616#endif
617
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DH		 618/*
619 * debug tracing
620 */
95c96174 621extern unsigned int rxrpc_debug;
17926a79
DH		 622
623#define dbgprintk(FMT,...) \
9f389f4b 624 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
17926a79 625
0dc47877
HH		 626#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
627#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
17926a79
DH		 628#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
629#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
630#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
631
632
633#if defined(__KDEBUG)
634#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
635#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
636#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
637#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
638#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
639
640#elif defined(CONFIG_AF_RXRPC_DEBUG)
641#define RXRPC_DEBUG_KENTER 0x01
642#define RXRPC_DEBUG_KLEAVE 0x02
643#define RXRPC_DEBUG_KDEBUG 0x04
644#define RXRPC_DEBUG_KPROTO 0x08
645#define RXRPC_DEBUG_KNET 0x10
646
647#define _enter(FMT,...) \
648do { \
649 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
650 kenter(FMT,##__VA_ARGS__); \
651} while (0)
652
653#define _leave(FMT,...) \
654do { \
655 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
656 kleave(FMT,##__VA_ARGS__); \
657} while (0)
658
659#define _debug(FMT,...) \
660do { \
661 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
662 kdebug(FMT,##__VA_ARGS__); \
663} while (0)
664
665#define _proto(FMT,...) \
666do { \
667 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
668 kproto(FMT,##__VA_ARGS__); \
669} while (0)
670
671#define _net(FMT,...) \
672do { \
673 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
674 knet(FMT,##__VA_ARGS__); \
675} while (0)
676
677#else
12fdff3f
DH		 678#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
679#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
680#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
681#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
682#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
17926a79
DH		 683#endif
684
685/*
686 * debug assertion checking
687 */
688#if 1 // defined(__KDEBUGALL)
689
690#define ASSERT(X) \
691do { \
692 if (unlikely(!(X))) { \
693 printk(KERN_ERR "\n"); \
694 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
695 BUG(); \
696 } \
697} while(0)
698
699#define ASSERTCMP(X, OP, Y) \
700do { \
701 if (unlikely(!((X) OP (Y)))) { \
702 printk(KERN_ERR "\n"); \
703 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
704 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
705 (unsigned long)(X), (unsigned long)(Y)); \
706 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
707 (unsigned long)(X), (unsigned long)(Y)); \
708 BUG(); \
709 } \
710} while(0)
711
712#define ASSERTIF(C, X) \
713do { \
714 if (unlikely((C) && !(X))) { \
715 printk(KERN_ERR "\n"); \
716 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
717 BUG(); \
718 } \
719} while(0)
720
721#define ASSERTIFCMP(C, X, OP, Y) \
722do { \
723 if (unlikely((C) && !((X) OP (Y)))) { \
724 printk(KERN_ERR "\n"); \
725 printk(KERN_ERR "RxRPC: Assertion failed\n"); \
726 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
727 (unsigned long)(X), (unsigned long)(Y)); \
728 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
729 (unsigned long)(X), (unsigned long)(Y)); \
730 BUG(); \
731 } \
732} while(0)
733
734#else
735
736#define ASSERT(X) \
737do { \
738} while(0)
739
740#define ASSERTCMP(X, OP, Y) \
741do { \
742} while(0)
743
744#define ASSERTIF(C, X) \
745do { \
746} while(0)
747
748#define ASSERTIFCMP(C, X, OP, Y) \
749do { \
750} while(0)
751
752#endif /* __KDEBUGALL */
753
754/*
755 * socket buffer accounting / leak finding
756 */
757static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
758{
759 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
760 //atomic_inc(&rxrpc_n_skbs);
761}
762
763#define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)
764
765static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
766{
767 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
768 //atomic_dec(&rxrpc_n_skbs);
769}
770
771#define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)
772
773static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
774{
775 if (skb) {
776 CHECK_SLAB_OKAY(&skb->users);
777 //_net("free skb %p %s [%d]",
778 // skb, fn, atomic_read(&rxrpc_n_skbs));
779 //atomic_dec(&rxrpc_n_skbs);
780 kfree_skb(skb);
781 }
782}
783
784#define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)
785
786static inline void rxrpc_purge_queue(struct sk_buff_head *list)
787{
788 struct sk_buff *skb;
789 while ((skb = skb_dequeue((list))) != NULL)
790 rxrpc_free_skb(skb);
791}
792
17926a79
DH		 793static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f)
794{
795 CHECK_SLAB_OKAY(&local->usage);
796 if (atomic_inc_return(&local->usage) == 1)
797 printk("resurrected (%s)\n", f);
798}
799
800#define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__)
801
802#define rxrpc_get_call(CALL) \
803do { \
804 CHECK_SLAB_OKAY(&(CALL)->usage); \
805 if (atomic_inc_return(&(CALL)->usage) == 1) \
806 BUG(); \
807} while(0)
808
809#define rxrpc_put_call(CALL) \
810do { \
811 __rxrpc_put_call(CALL); \
812} while(0)
Linux 6.x block layer and io_uring tree(s)