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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 |
23 | struct 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 | */ | |
40 | enum { | |
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 | */ | |
52 | struct 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 | */ | |
82 | struct 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 |
97 | enum 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 | */ | |
107 | struct 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 | */ | |
150 | struct 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 | */ | |
173 | struct 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 | */ | |
200 | struct 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 | */ | |
221 | struct 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 | */ | |
240 | struct 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 | */ | |
297 | struct 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 | */ | |
407 | static 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 |
421 | extern atomic_t rxrpc_n_skbs; |
422 | extern __be32 rxrpc_epoch; | |
423 | extern atomic_t rxrpc_debug_id; | |
424 | extern struct workqueue_struct *rxrpc_workqueue; | |
17926a79 DH |
425 | |
426 | /* | |
427 | * ar-accept.c | |
428 | */ | |
c1b1203d JP |
429 | void rxrpc_accept_incoming_calls(struct work_struct *); |
430 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); | |
431 | int rxrpc_reject_call(struct rxrpc_sock *); | |
17926a79 DH |
432 | |
433 | /* | |
434 | * ar-ack.c | |
435 | */ | |
c1b1203d JP |
436 | void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); |
437 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); | |
438 | void rxrpc_process_call(struct work_struct *); | |
17926a79 DH |
439 | |
440 | /* | |
441 | * ar-call.c | |
442 | */ | |
443 | extern struct kmem_cache *rxrpc_call_jar; | |
444 | extern struct list_head rxrpc_calls; | |
445 | extern rwlock_t rxrpc_call_lock; | |
446 | ||
c1b1203d JP |
447 | struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, |
448 | struct rxrpc_transport *, | |
449 | struct rxrpc_conn_bundle *, | |
450 | unsigned long, int, gfp_t); | |
451 | struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, | |
452 | struct rxrpc_connection *, | |
453 | struct rxrpc_header *, gfp_t); | |
454 | struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long); | |
455 | void rxrpc_release_call(struct rxrpc_call *); | |
456 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); | |
457 | void __rxrpc_put_call(struct rxrpc_call *); | |
458 | void __exit rxrpc_destroy_all_calls(void); | |
17926a79 DH |
459 | |
460 | /* | |
461 | * ar-connection.c | |
462 | */ | |
463 | extern struct list_head rxrpc_connections; | |
464 | extern rwlock_t rxrpc_connection_lock; | |
465 | ||
c1b1203d JP |
466 | struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, |
467 | struct rxrpc_transport *, | |
468 | struct key *, __be16, gfp_t); | |
469 | void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *); | |
470 | int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, | |
471 | struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t); | |
472 | void rxrpc_put_connection(struct rxrpc_connection *); | |
473 | void __exit rxrpc_destroy_all_connections(void); | |
474 | struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, | |
475 | struct rxrpc_header *); | |
17926a79 DH |
476 | extern struct rxrpc_connection * |
477 | rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *, | |
478 | gfp_t); | |
479 | ||
480 | /* | |
481 | * ar-connevent.c | |
482 | */ | |
c1b1203d JP |
483 | void rxrpc_process_connection(struct work_struct *); |
484 | void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); | |
485 | void rxrpc_reject_packets(struct work_struct *); | |
17926a79 DH |
486 | |
487 | /* | |
488 | * ar-error.c | |
489 | */ | |
c1b1203d JP |
490 | void rxrpc_UDP_error_report(struct sock *); |
491 | void rxrpc_UDP_error_handler(struct work_struct *); | |
17926a79 DH |
492 | |
493 | /* | |
494 | * ar-input.c | |
495 | */ | |
496 | extern unsigned long rxrpc_ack_timeout; | |
497 | extern const char *rxrpc_pkts[]; | |
498 | ||
c1b1203d JP |
499 | void rxrpc_data_ready(struct sock *, int); |
500 | int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); | |
501 | void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); | |
17926a79 DH |
502 | |
503 | /* | |
504 | * ar-local.c | |
505 | */ | |
506 | extern rwlock_t rxrpc_local_lock; | |
c1b1203d JP |
507 | struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); |
508 | void rxrpc_put_local(struct rxrpc_local *); | |
509 | void __exit rxrpc_destroy_all_locals(void); | |
17926a79 DH |
510 | |
511 | /* | |
512 | * ar-key.c | |
513 | */ | |
514 | extern struct key_type key_type_rxrpc; | |
515 | extern struct key_type key_type_rxrpc_s; | |
516 | ||
c1b1203d JP |
517 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); |
518 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
519 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, | |
520 | u32); | |
17926a79 DH |
521 | |
522 | /* | |
523 | * ar-output.c | |
524 | */ | |
525 | extern int rxrpc_resend_timeout; | |
526 | ||
c1b1203d JP |
527 | int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); |
528 | int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *, | |
529 | struct rxrpc_transport *, struct msghdr *, size_t); | |
530 | int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *, struct msghdr *, | |
531 | size_t); | |
17926a79 DH |
532 | |
533 | /* | |
534 | * ar-peer.c | |
535 | */ | |
c1b1203d JP |
536 | struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); |
537 | void rxrpc_put_peer(struct rxrpc_peer *); | |
538 | struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16); | |
539 | void __exit rxrpc_destroy_all_peers(void); | |
17926a79 DH |
540 | |
541 | /* | |
542 | * ar-proc.c | |
543 | */ | |
036c2e27 JE |
544 | extern const char *const rxrpc_call_states[]; |
545 | extern const struct file_operations rxrpc_call_seq_fops; | |
546 | extern const struct file_operations rxrpc_connection_seq_fops; | |
17926a79 DH |
547 | |
548 | /* | |
549 | * ar-recvmsg.c | |
550 | */ | |
c1b1203d JP |
551 | void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); |
552 | int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *, size_t, | |
553 | int); | |
17926a79 DH |
554 | |
555 | /* | |
556 | * ar-security.c | |
557 | */ | |
c1b1203d JP |
558 | int rxrpc_register_security(struct rxrpc_security *); |
559 | void rxrpc_unregister_security(struct rxrpc_security *); | |
560 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); | |
561 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); | |
562 | int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, size_t, | |
563 | void *); | |
564 | int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, u32 *); | |
565 | void rxrpc_clear_conn_security(struct rxrpc_connection *); | |
17926a79 DH |
566 | |
567 | /* | |
568 | * ar-skbuff.c | |
569 | */ | |
c1b1203d | 570 | void rxrpc_packet_destructor(struct sk_buff *); |
17926a79 DH |
571 | |
572 | /* | |
573 | * ar-transport.c | |
574 | */ | |
c1b1203d JP |
575 | struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, |
576 | struct rxrpc_peer *, gfp_t); | |
577 | void rxrpc_put_transport(struct rxrpc_transport *); | |
578 | void __exit rxrpc_destroy_all_transports(void); | |
579 | struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, | |
580 | struct rxrpc_peer *); | |
17926a79 DH |
581 | |
582 | /* | |
583 | * debug tracing | |
584 | */ | |
95c96174 | 585 | extern unsigned int rxrpc_debug; |
17926a79 DH |
586 | |
587 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 588 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 589 | |
0dc47877 HH |
590 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
591 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 DH |
592 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
593 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
594 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
595 | ||
596 | ||
597 | #if defined(__KDEBUG) | |
598 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
599 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
600 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
601 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
602 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
603 | ||
604 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
605 | #define RXRPC_DEBUG_KENTER 0x01 | |
606 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
607 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
608 | #define RXRPC_DEBUG_KPROTO 0x08 | |
609 | #define RXRPC_DEBUG_KNET 0x10 | |
610 | ||
611 | #define _enter(FMT,...) \ | |
612 | do { \ | |
613 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
614 | kenter(FMT,##__VA_ARGS__); \ | |
615 | } while (0) | |
616 | ||
617 | #define _leave(FMT,...) \ | |
618 | do { \ | |
619 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
620 | kleave(FMT,##__VA_ARGS__); \ | |
621 | } while (0) | |
622 | ||
623 | #define _debug(FMT,...) \ | |
624 | do { \ | |
625 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
626 | kdebug(FMT,##__VA_ARGS__); \ | |
627 | } while (0) | |
628 | ||
629 | #define _proto(FMT,...) \ | |
630 | do { \ | |
631 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
632 | kproto(FMT,##__VA_ARGS__); \ | |
633 | } while (0) | |
634 | ||
635 | #define _net(FMT,...) \ | |
636 | do { \ | |
637 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
638 | knet(FMT,##__VA_ARGS__); \ | |
639 | } while (0) | |
640 | ||
641 | #else | |
12fdff3f DH |
642 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
643 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
644 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
645 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) | |
646 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) | |
17926a79 DH |
647 | #endif |
648 | ||
649 | /* | |
650 | * debug assertion checking | |
651 | */ | |
652 | #if 1 // defined(__KDEBUGALL) | |
653 | ||
654 | #define ASSERT(X) \ | |
655 | do { \ | |
656 | if (unlikely(!(X))) { \ | |
657 | printk(KERN_ERR "\n"); \ | |
658 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
659 | BUG(); \ | |
660 | } \ | |
661 | } while(0) | |
662 | ||
663 | #define ASSERTCMP(X, OP, Y) \ | |
664 | do { \ | |
665 | if (unlikely(!((X) OP (Y)))) { \ | |
666 | printk(KERN_ERR "\n"); \ | |
667 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
668 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
669 | (unsigned long)(X), (unsigned long)(Y)); \ | |
670 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
671 | (unsigned long)(X), (unsigned long)(Y)); \ | |
672 | BUG(); \ | |
673 | } \ | |
674 | } while(0) | |
675 | ||
676 | #define ASSERTIF(C, X) \ | |
677 | do { \ | |
678 | if (unlikely((C) && !(X))) { \ | |
679 | printk(KERN_ERR "\n"); \ | |
680 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
681 | BUG(); \ | |
682 | } \ | |
683 | } while(0) | |
684 | ||
685 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
686 | do { \ | |
687 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
688 | printk(KERN_ERR "\n"); \ | |
689 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
690 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
691 | (unsigned long)(X), (unsigned long)(Y)); \ | |
692 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
693 | (unsigned long)(X), (unsigned long)(Y)); \ | |
694 | BUG(); \ | |
695 | } \ | |
696 | } while(0) | |
697 | ||
698 | #else | |
699 | ||
700 | #define ASSERT(X) \ | |
701 | do { \ | |
702 | } while(0) | |
703 | ||
704 | #define ASSERTCMP(X, OP, Y) \ | |
705 | do { \ | |
706 | } while(0) | |
707 | ||
708 | #define ASSERTIF(C, X) \ | |
709 | do { \ | |
710 | } while(0) | |
711 | ||
712 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
713 | do { \ | |
714 | } while(0) | |
715 | ||
716 | #endif /* __KDEBUGALL */ | |
717 | ||
718 | /* | |
719 | * socket buffer accounting / leak finding | |
720 | */ | |
721 | static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) | |
722 | { | |
723 | //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); | |
724 | //atomic_inc(&rxrpc_n_skbs); | |
725 | } | |
726 | ||
727 | #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) | |
728 | ||
729 | static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) | |
730 | { | |
731 | //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); | |
732 | //atomic_dec(&rxrpc_n_skbs); | |
733 | } | |
734 | ||
735 | #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) | |
736 | ||
737 | static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) | |
738 | { | |
739 | if (skb) { | |
740 | CHECK_SLAB_OKAY(&skb->users); | |
741 | //_net("free skb %p %s [%d]", | |
742 | // skb, fn, atomic_read(&rxrpc_n_skbs)); | |
743 | //atomic_dec(&rxrpc_n_skbs); | |
744 | kfree_skb(skb); | |
745 | } | |
746 | } | |
747 | ||
748 | #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) | |
749 | ||
750 | static inline void rxrpc_purge_queue(struct sk_buff_head *list) | |
751 | { | |
752 | struct sk_buff *skb; | |
753 | while ((skb = skb_dequeue((list))) != NULL) | |
754 | rxrpc_free_skb(skb); | |
755 | } | |
756 | ||
17926a79 DH |
757 | static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) |
758 | { | |
759 | CHECK_SLAB_OKAY(&local->usage); | |
760 | if (atomic_inc_return(&local->usage) == 1) | |
761 | printk("resurrected (%s)\n", f); | |
762 | } | |
763 | ||
764 | #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) | |
765 | ||
766 | #define rxrpc_get_call(CALL) \ | |
767 | do { \ | |
768 | CHECK_SLAB_OKAY(&(CALL)->usage); \ | |
769 | if (atomic_inc_return(&(CALL)->usage) == 1) \ | |
770 | BUG(); \ | |
771 | } while(0) | |
772 | ||
773 | #define rxrpc_put_call(CALL) \ | |
774 | do { \ | |
775 | __rxrpc_put_call(CALL); \ | |
776 | } while(0) |