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1 | /* AF_RXRPC internal definitions |
2 | * | |
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <rxrpc/packet.h> | |
13 | ||
14 | #if 0 | |
15 | #define CHECK_SLAB_OKAY(X) \ | |
16 | BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ | |
17 | (POISON_FREE << 8 | POISON_FREE)) | |
18 | #else | |
19 | #define CHECK_SLAB_OKAY(X) do {} while(0) | |
20 | #endif | |
21 | ||
22 | extern atomic_t rxrpc_n_skbs; | |
23 | ||
24 | #define FCRYPT_BSIZE 8 | |
25 | struct rxrpc_crypt { | |
26 | union { | |
27 | u8 x[FCRYPT_BSIZE]; | |
28 | u32 n[2]; | |
29 | }; | |
30 | } __attribute__((aligned(8))); | |
31 | ||
32 | extern __be32 rxrpc_epoch; /* local epoch for detecting local-end reset */ | |
33 | extern atomic_t rxrpc_debug_id; /* current debugging ID */ | |
34 | ||
35 | /* | |
36 | * sk_state for RxRPC sockets | |
37 | */ | |
38 | enum { | |
39 | RXRPC_UNCONNECTED = 0, | |
40 | RXRPC_CLIENT_BOUND, /* client local address bound */ | |
41 | RXRPC_CLIENT_CONNECTED, /* client is connected */ | |
42 | RXRPC_SERVER_BOUND, /* server local address bound */ | |
43 | RXRPC_SERVER_LISTENING, /* server listening for connections */ | |
44 | RXRPC_CLOSE, /* socket is being closed */ | |
45 | }; | |
46 | ||
47 | /* | |
48 | * RxRPC socket definition | |
49 | */ | |
50 | struct rxrpc_sock { | |
51 | /* WARNING: sk has to be the first member */ | |
52 | struct sock sk; | |
53 | struct rxrpc_local *local; /* local endpoint */ | |
54 | struct rxrpc_transport *trans; /* transport handler */ | |
55 | struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */ | |
56 | struct rxrpc_connection *conn; /* exclusive virtual connection */ | |
57 | struct list_head listen_link; /* link in the local endpoint's listen list */ | |
58 | struct list_head secureq; /* calls awaiting connection security clearance */ | |
59 | struct list_head acceptq; /* calls awaiting acceptance */ | |
60 | struct key *key; /* security for this socket */ | |
61 | struct key *securities; /* list of server security descriptors */ | |
62 | struct rb_root calls; /* outstanding calls on this socket */ | |
63 | unsigned long flags; | |
64 | #define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */ | |
65 | rwlock_t call_lock; /* lock for calls */ | |
66 | u32 min_sec_level; /* minimum security level */ | |
67 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT | |
68 | struct sockaddr_rxrpc srx; /* local address */ | |
69 | sa_family_t proto; /* protocol created with */ | |
70 | __be16 service_id; /* service ID of local/remote service */ | |
71 | }; | |
72 | ||
73 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) | |
74 | ||
75 | /* | |
76 | * RxRPC socket buffer private variables | |
77 | * - max 48 bytes (struct sk_buff::cb) | |
78 | */ | |
79 | struct rxrpc_skb_priv { | |
80 | struct rxrpc_call *call; /* call with which associated */ | |
81 | unsigned long resend_at; /* time in jiffies at which to resend */ | |
82 | union { | |
83 | unsigned offset; /* offset into buffer of next read */ | |
84 | int remain; /* amount of space remaining for next write */ | |
85 | u32 error; /* network error code */ | |
86 | bool need_resend; /* T if needs resending */ | |
87 | }; | |
88 | ||
89 | struct rxrpc_header hdr; /* RxRPC packet header from this packet */ | |
90 | }; | |
91 | ||
92 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) | |
93 | ||
94 | enum { | |
95 | RXRPC_SKB_MARK_DATA, /* data message */ | |
96 | RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ | |
97 | RXRPC_SKB_MARK_BUSY, /* server busy message */ | |
98 | RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ | |
99 | RXRPC_SKB_MARK_NET_ERROR, /* network error message */ | |
100 | RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ | |
101 | RXRPC_SKB_MARK_NEW_CALL, /* local error message */ | |
102 | }; | |
103 | ||
104 | enum rxrpc_command { | |
105 | RXRPC_CMD_SEND_DATA, /* send data message */ | |
106 | RXRPC_CMD_SEND_ABORT, /* request abort generation */ | |
107 | RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ | |
108 | RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ | |
109 | }; | |
110 | ||
111 | /* | |
112 | * RxRPC security module interface | |
113 | */ | |
114 | struct rxrpc_security { | |
115 | struct module *owner; /* providing module */ | |
116 | struct list_head link; /* link in master list */ | |
117 | const char *name; /* name of this service */ | |
118 | u8 security_index; /* security type provided */ | |
119 | ||
120 | /* initialise a connection's security */ | |
121 | int (*init_connection_security)(struct rxrpc_connection *); | |
122 | ||
123 | /* prime a connection's packet security */ | |
124 | void (*prime_packet_security)(struct rxrpc_connection *); | |
125 | ||
126 | /* impose security on a packet */ | |
127 | int (*secure_packet)(const struct rxrpc_call *, | |
128 | struct sk_buff *, | |
129 | size_t, | |
130 | void *); | |
131 | ||
132 | /* verify the security on a received packet */ | |
133 | int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, | |
134 | u32 *); | |
135 | ||
136 | /* issue a challenge */ | |
137 | int (*issue_challenge)(struct rxrpc_connection *); | |
138 | ||
139 | /* respond to a challenge */ | |
140 | int (*respond_to_challenge)(struct rxrpc_connection *, | |
141 | struct sk_buff *, | |
142 | u32 *); | |
143 | ||
144 | /* verify a response */ | |
145 | int (*verify_response)(struct rxrpc_connection *, | |
146 | struct sk_buff *, | |
147 | u32 *); | |
148 | ||
149 | /* clear connection security */ | |
150 | void (*clear)(struct rxrpc_connection *); | |
151 | }; | |
152 | ||
153 | /* | |
154 | * RxRPC local transport endpoint definition | |
155 | * - matched by local port, address and protocol type | |
156 | */ | |
157 | struct rxrpc_local { | |
158 | struct socket *socket; /* my UDP socket */ | |
159 | struct work_struct destroyer; /* endpoint destroyer */ | |
160 | struct work_struct acceptor; /* incoming call processor */ | |
161 | struct work_struct rejecter; /* packet reject writer */ | |
162 | struct list_head services; /* services listening on this endpoint */ | |
163 | struct list_head link; /* link in endpoint list */ | |
164 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ | |
165 | struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ | |
166 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ | |
167 | spinlock_t lock; /* access lock */ | |
168 | rwlock_t services_lock; /* lock for services list */ | |
169 | atomic_t usage; | |
170 | int debug_id; /* debug ID for printks */ | |
171 | volatile char error_rcvd; /* T if received ICMP error outstanding */ | |
172 | struct sockaddr_rxrpc srx; /* local address */ | |
173 | }; | |
174 | ||
175 | /* | |
176 | * RxRPC remote transport endpoint definition | |
177 | * - matched by remote port, address and protocol type | |
178 | * - holds the connection ID counter for connections between the two endpoints | |
179 | */ | |
180 | struct rxrpc_peer { | |
181 | struct work_struct destroyer; /* peer destroyer */ | |
182 | struct list_head link; /* link in master peer list */ | |
183 | struct list_head error_targets; /* targets for net error distribution */ | |
184 | spinlock_t lock; /* access lock */ | |
185 | atomic_t usage; | |
186 | unsigned if_mtu; /* interface MTU for this peer */ | |
187 | unsigned mtu; /* network MTU for this peer */ | |
188 | unsigned maxdata; /* data size (MTU - hdrsize) */ | |
189 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ | |
190 | int debug_id; /* debug ID for printks */ | |
191 | int net_error; /* network error distributed */ | |
192 | struct sockaddr_rxrpc srx; /* remote address */ | |
193 | ||
194 | /* calculated RTT cache */ | |
195 | #define RXRPC_RTT_CACHE_SIZE 32 | |
196 | suseconds_t rtt; /* current RTT estimate (in uS) */ | |
197 | unsigned rtt_point; /* next entry at which to insert */ | |
198 | unsigned rtt_usage; /* amount of cache actually used */ | |
199 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ | |
200 | }; | |
201 | ||
202 | /* | |
203 | * RxRPC point-to-point transport / connection manager definition | |
204 | * - handles a bundle of connections between two endpoints | |
205 | * - matched by { local, peer } | |
206 | */ | |
207 | struct rxrpc_transport { | |
208 | struct rxrpc_local *local; /* local transport endpoint */ | |
209 | struct rxrpc_peer *peer; /* remote transport endpoint */ | |
210 | struct work_struct error_handler; /* network error distributor */ | |
211 | struct rb_root bundles; /* client connection bundles on this transport */ | |
212 | struct rb_root client_conns; /* client connections on this transport */ | |
213 | struct rb_root server_conns; /* server connections on this transport */ | |
214 | struct list_head link; /* link in master session list */ | |
215 | struct sk_buff_head error_queue; /* error packets awaiting processing */ | |
216 | time_t put_time; /* time at which to reap */ | |
217 | spinlock_t client_lock; /* client connection allocation lock */ | |
218 | rwlock_t conn_lock; /* lock for active/dead connections */ | |
219 | atomic_t usage; | |
220 | int debug_id; /* debug ID for printks */ | |
221 | unsigned int conn_idcounter; /* connection ID counter (client) */ | |
222 | }; | |
223 | ||
224 | /* | |
225 | * RxRPC client connection bundle | |
226 | * - matched by { transport, service_id, key } | |
227 | */ | |
228 | struct rxrpc_conn_bundle { | |
229 | struct rb_node node; /* node in transport's lookup tree */ | |
230 | struct list_head unused_conns; /* unused connections in this bundle */ | |
231 | struct list_head avail_conns; /* available connections in this bundle */ | |
232 | struct list_head busy_conns; /* busy connections in this bundle */ | |
233 | struct key *key; /* security for this bundle */ | |
234 | wait_queue_head_t chanwait; /* wait for channel to become available */ | |
235 | atomic_t usage; | |
236 | int debug_id; /* debug ID for printks */ | |
237 | unsigned short num_conns; /* number of connections in this bundle */ | |
238 | __be16 service_id; /* service ID */ | |
239 | uint8_t security_ix; /* security type */ | |
240 | }; | |
241 | ||
242 | /* | |
243 | * RxRPC connection definition | |
244 | * - matched by { transport, service_id, conn_id, direction, key } | |
245 | * - each connection can only handle four simultaneous calls | |
246 | */ | |
247 | struct rxrpc_connection { | |
248 | struct rxrpc_transport *trans; /* transport session */ | |
249 | struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ | |
250 | struct work_struct processor; /* connection event processor */ | |
251 | struct rb_node node; /* node in transport's lookup tree */ | |
252 | struct list_head link; /* link in master connection list */ | |
253 | struct list_head bundle_link; /* link in bundle */ | |
254 | struct rb_root calls; /* calls on this connection */ | |
255 | struct sk_buff_head rx_queue; /* received conn-level packets */ | |
256 | struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ | |
257 | struct rxrpc_security *security; /* applied security module */ | |
258 | struct key *key; /* security for this connection (client) */ | |
259 | struct key *server_key; /* security for this service */ | |
260 | struct crypto_blkcipher *cipher; /* encryption handle */ | |
261 | struct rxrpc_crypt csum_iv; /* packet checksum base */ | |
262 | unsigned long events; | |
263 | #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ | |
264 | time_t put_time; /* time at which to reap */ | |
265 | rwlock_t lock; /* access lock */ | |
266 | spinlock_t state_lock; /* state-change lock */ | |
267 | atomic_t usage; | |
268 | u32 real_conn_id; /* connection ID (host-endian) */ | |
269 | enum { /* current state of connection */ | |
270 | RXRPC_CONN_UNUSED, /* - connection not yet attempted */ | |
271 | RXRPC_CONN_CLIENT, /* - client connection */ | |
272 | RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ | |
273 | RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ | |
274 | RXRPC_CONN_SERVER, /* - server secured connection */ | |
275 | RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ | |
276 | RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ | |
277 | RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ | |
278 | } state; | |
279 | int error; /* error code for local abort */ | |
280 | int debug_id; /* debug ID for printks */ | |
281 | unsigned call_counter; /* call ID counter */ | |
282 | atomic_t serial; /* packet serial number counter */ | |
283 | atomic_t hi_serial; /* highest serial number received */ | |
284 | u8 avail_calls; /* number of calls available */ | |
285 | u8 size_align; /* data size alignment (for security) */ | |
286 | u8 header_size; /* rxrpc + security header size */ | |
287 | u8 security_size; /* security header size */ | |
288 | u32 security_level; /* security level negotiated */ | |
289 | u32 security_nonce; /* response re-use preventer */ | |
290 | ||
291 | /* the following are all in net order */ | |
292 | __be32 epoch; /* epoch of this connection */ | |
293 | __be32 cid; /* connection ID */ | |
294 | __be16 service_id; /* service ID */ | |
295 | u8 security_ix; /* security type */ | |
296 | u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ | |
297 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ | |
298 | }; | |
299 | ||
300 | /* | |
301 | * RxRPC call definition | |
302 | * - matched by { connection, call_id } | |
303 | */ | |
304 | struct rxrpc_call { | |
305 | struct rxrpc_connection *conn; /* connection carrying call */ | |
306 | struct rxrpc_sock *socket; /* socket responsible */ | |
307 | struct timer_list lifetimer; /* lifetime remaining on call */ | |
308 | struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ | |
309 | struct timer_list ack_timer; /* ACK generation timer */ | |
310 | struct timer_list resend_timer; /* Tx resend timer */ | |
311 | struct work_struct destroyer; /* call destroyer */ | |
312 | struct work_struct processor; /* packet processor and ACK generator */ | |
313 | struct list_head link; /* link in master call list */ | |
314 | struct list_head error_link; /* link in error distribution list */ | |
315 | struct list_head accept_link; /* calls awaiting acceptance */ | |
316 | struct rb_node sock_node; /* node in socket call tree */ | |
317 | struct rb_node conn_node; /* node in connection call tree */ | |
318 | struct sk_buff_head rx_queue; /* received packets */ | |
319 | struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ | |
320 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ | |
321 | wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ | |
322 | unsigned long user_call_ID; /* user-defined call ID */ | |
323 | unsigned long creation_jif; /* time of call creation */ | |
324 | unsigned long flags; | |
325 | #define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */ | |
326 | #define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */ | |
327 | #define RXRPC_CALL_RCVD_LAST 2 /* all packets received */ | |
328 | #define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */ | |
329 | #define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */ | |
330 | #define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */ | |
331 | #define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */ | |
332 | #define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */ | |
333 | #define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */ | |
334 | unsigned long events; | |
335 | #define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */ | |
336 | #define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */ | |
337 | #define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */ | |
338 | #define RXRPC_CALL_RCVD_ERROR 3 /* network error received */ | |
339 | #define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */ | |
340 | #define RXRPC_CALL_ACK 5 /* need to generate ACK */ | |
341 | #define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */ | |
342 | #define RXRPC_CALL_ABORT 7 /* need to generate abort */ | |
343 | #define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */ | |
344 | #define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */ | |
345 | #define RXRPC_CALL_RESEND 10 /* Tx resend required */ | |
346 | #define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */ | |
347 | #define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */ | |
348 | #define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */ | |
349 | #define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */ | |
350 | #define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */ | |
351 | #define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */ | |
352 | ||
353 | spinlock_t lock; | |
354 | rwlock_t state_lock; /* lock for state transition */ | |
355 | atomic_t usage; | |
356 | atomic_t sequence; /* Tx data packet sequence counter */ | |
357 | u32 abort_code; /* local/remote abort code */ | |
358 | enum { /* current state of call */ | |
359 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ | |
360 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ | |
361 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ | |
362 | RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ | |
363 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ | |
364 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ | |
365 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ | |
366 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ | |
367 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ | |
368 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ | |
369 | RXRPC_CALL_COMPLETE, /* - call completed */ | |
370 | RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ | |
371 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ | |
372 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ | |
373 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ | |
374 | RXRPC_CALL_DEAD, /* - call is dead */ | |
375 | } state; | |
376 | int debug_id; /* debug ID for printks */ | |
377 | u8 channel; /* connection channel occupied by this call */ | |
378 | ||
379 | /* transmission-phase ACK management */ | |
380 | uint8_t acks_head; /* offset into window of first entry */ | |
381 | uint8_t acks_tail; /* offset into window of last entry */ | |
382 | uint8_t acks_winsz; /* size of un-ACK'd window */ | |
383 | uint8_t acks_unacked; /* lowest unacked packet in last ACK received */ | |
384 | int acks_latest; /* serial number of latest ACK received */ | |
385 | rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ | |
386 | unsigned long *acks_window; /* sent packet window | |
387 | * - elements are pointers with LSB set if ACK'd | |
388 | */ | |
389 | ||
390 | /* receive-phase ACK management */ | |
391 | rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ | |
392 | rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ | |
393 | rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ | |
394 | rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ | |
395 | rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ | |
396 | rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ | |
397 | rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */ | |
398 | uint8_t ackr_reason; /* reason to ACK */ | |
399 | __be32 ackr_serial; /* serial of packet being ACK'd */ | |
400 | atomic_t ackr_not_idle; /* number of packets in Rx queue */ | |
401 | ||
402 | /* received packet records, 1 bit per record */ | |
403 | #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) | |
404 | unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; | |
405 | ||
406 | /* the following should all be in net order */ | |
407 | __be32 cid; /* connection ID + channel index */ | |
408 | __be32 call_id; /* call ID on connection */ | |
409 | }; | |
410 | ||
411 | /* | |
412 | * RxRPC key for Kerberos (type-2 security) | |
413 | */ | |
414 | struct rxkad_key { | |
415 | u16 security_index; /* RxRPC header security index */ | |
416 | u16 ticket_len; /* length of ticket[] */ | |
417 | u32 expiry; /* time at which expires */ | |
418 | u32 kvno; /* key version number */ | |
419 | u8 session_key[8]; /* DES session key */ | |
420 | u8 ticket[0]; /* the encrypted ticket */ | |
421 | }; | |
422 | ||
423 | struct rxrpc_key_payload { | |
424 | struct rxkad_key k; | |
425 | }; | |
426 | ||
427 | /* | |
428 | * locally abort an RxRPC call | |
429 | */ | |
430 | static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) | |
431 | { | |
432 | write_lock_bh(&call->state_lock); | |
433 | if (call->state < RXRPC_CALL_COMPLETE) { | |
434 | call->abort_code = abort_code; | |
435 | call->state = RXRPC_CALL_LOCALLY_ABORTED; | |
436 | set_bit(RXRPC_CALL_ABORT, &call->events); | |
437 | } | |
438 | write_unlock_bh(&call->state_lock); | |
439 | } | |
440 | ||
441 | /* | |
442 | * put a packet up for transport-level abort | |
443 | */ | |
444 | static inline | |
445 | void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb) | |
446 | { | |
447 | CHECK_SLAB_OKAY(&local->usage); | |
448 | if (!atomic_inc_not_zero(&local->usage)) { | |
449 | printk("resurrected on reject\n"); | |
450 | BUG(); | |
451 | } | |
452 | skb_queue_tail(&local->reject_queue, skb); | |
453 | schedule_work(&local->rejecter); | |
454 | } | |
455 | ||
456 | /* | |
457 | * ar-accept.c | |
458 | */ | |
459 | extern void rxrpc_accept_incoming_calls(struct work_struct *); | |
460 | extern int rxrpc_accept_call(struct rxrpc_sock *, unsigned long); | |
461 | ||
462 | /* | |
463 | * ar-ack.c | |
464 | */ | |
465 | extern void __rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool); | |
466 | extern void rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool); | |
467 | extern void rxrpc_process_call(struct work_struct *); | |
468 | ||
469 | /* | |
470 | * ar-call.c | |
471 | */ | |
472 | extern struct kmem_cache *rxrpc_call_jar; | |
473 | extern struct list_head rxrpc_calls; | |
474 | extern rwlock_t rxrpc_call_lock; | |
475 | ||
476 | extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, | |
477 | struct rxrpc_transport *, | |
478 | struct rxrpc_conn_bundle *, | |
479 | unsigned long, int, gfp_t); | |
480 | extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, | |
481 | struct rxrpc_connection *, | |
482 | struct rxrpc_header *, gfp_t); | |
483 | extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, | |
484 | unsigned long); | |
485 | extern void rxrpc_release_call(struct rxrpc_call *); | |
486 | extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *); | |
487 | extern void __rxrpc_put_call(struct rxrpc_call *); | |
488 | extern void __exit rxrpc_destroy_all_calls(void); | |
489 | ||
490 | /* | |
491 | * ar-connection.c | |
492 | */ | |
493 | extern struct list_head rxrpc_connections; | |
494 | extern rwlock_t rxrpc_connection_lock; | |
495 | ||
496 | extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, | |
497 | struct rxrpc_transport *, | |
498 | struct key *, | |
499 | __be16, gfp_t); | |
500 | extern void rxrpc_put_bundle(struct rxrpc_transport *, | |
501 | struct rxrpc_conn_bundle *); | |
502 | extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, | |
503 | struct rxrpc_conn_bundle *, struct rxrpc_call *, | |
504 | gfp_t); | |
505 | extern void rxrpc_put_connection(struct rxrpc_connection *); | |
506 | extern void __exit rxrpc_destroy_all_connections(void); | |
507 | extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, | |
508 | struct rxrpc_header *); | |
509 | extern struct rxrpc_connection * | |
510 | rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *, | |
511 | gfp_t); | |
512 | ||
513 | /* | |
514 | * ar-connevent.c | |
515 | */ | |
516 | extern void rxrpc_process_connection(struct work_struct *); | |
517 | extern void rxrpc_reject_packets(struct work_struct *); | |
518 | ||
519 | /* | |
520 | * ar-error.c | |
521 | */ | |
522 | extern void rxrpc_UDP_error_report(struct sock *); | |
523 | extern void rxrpc_UDP_error_handler(struct work_struct *); | |
524 | ||
525 | /* | |
526 | * ar-input.c | |
527 | */ | |
528 | extern unsigned long rxrpc_ack_timeout; | |
529 | extern const char *rxrpc_pkts[]; | |
530 | ||
531 | extern void rxrpc_data_ready(struct sock *, int); | |
532 | extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, | |
533 | bool); | |
534 | extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); | |
535 | ||
536 | /* | |
537 | * ar-local.c | |
538 | */ | |
539 | extern rwlock_t rxrpc_local_lock; | |
540 | extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); | |
541 | extern void rxrpc_put_local(struct rxrpc_local *); | |
542 | extern void __exit rxrpc_destroy_all_locals(void); | |
543 | ||
544 | /* | |
545 | * ar-key.c | |
546 | */ | |
547 | extern struct key_type key_type_rxrpc; | |
548 | extern struct key_type key_type_rxrpc_s; | |
549 | ||
550 | extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); | |
551 | extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
552 | extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, | |
553 | time_t, u32); | |
554 | ||
555 | /* | |
556 | * ar-output.c | |
557 | */ | |
558 | extern int rxrpc_resend_timeout; | |
559 | ||
560 | extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); | |
561 | extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *, | |
562 | struct rxrpc_transport *, struct msghdr *, | |
563 | size_t); | |
564 | extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *, | |
565 | struct msghdr *, size_t); | |
566 | ||
567 | /* | |
568 | * ar-peer.c | |
569 | */ | |
570 | extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); | |
571 | extern void rxrpc_put_peer(struct rxrpc_peer *); | |
572 | extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, | |
573 | __be32, __be16); | |
574 | extern void __exit rxrpc_destroy_all_peers(void); | |
575 | ||
576 | /* | |
577 | * ar-proc.c | |
578 | */ | |
579 | extern const char *rxrpc_call_states[]; | |
580 | extern struct file_operations rxrpc_call_seq_fops; | |
581 | extern struct file_operations rxrpc_connection_seq_fops; | |
582 | ||
583 | /* | |
584 | * ar-recvmsg.c | |
585 | */ | |
586 | extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *, | |
587 | size_t, int); | |
588 | ||
589 | /* | |
590 | * ar-security.c | |
591 | */ | |
592 | extern int rxrpc_register_security(struct rxrpc_security *); | |
593 | extern void rxrpc_unregister_security(struct rxrpc_security *); | |
594 | extern int rxrpc_init_client_conn_security(struct rxrpc_connection *); | |
595 | extern int rxrpc_init_server_conn_security(struct rxrpc_connection *); | |
596 | extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, | |
597 | size_t, void *); | |
598 | extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, | |
599 | u32 *); | |
600 | extern void rxrpc_clear_conn_security(struct rxrpc_connection *); | |
601 | ||
602 | /* | |
603 | * ar-skbuff.c | |
604 | */ | |
605 | extern void rxrpc_packet_destructor(struct sk_buff *); | |
606 | ||
607 | /* | |
608 | * ar-transport.c | |
609 | */ | |
610 | extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, | |
611 | struct rxrpc_peer *, | |
612 | gfp_t); | |
613 | extern void rxrpc_put_transport(struct rxrpc_transport *); | |
614 | extern void __exit rxrpc_destroy_all_transports(void); | |
615 | extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, | |
616 | struct rxrpc_peer *); | |
617 | ||
618 | /* | |
619 | * debug tracing | |
620 | */ | |
621 | extern unsigned rxrpc_debug; | |
622 | ||
623 | #define dbgprintk(FMT,...) \ | |
624 | printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__) | |
625 | ||
626 | /* make sure we maintain the format strings, even when debugging is disabled */ | |
627 | static inline __attribute__((format(printf,1,2))) | |
628 | void _dbprintk(const char *fmt, ...) | |
629 | { | |
630 | } | |
631 | ||
632 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
633 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
634 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) | |
635 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
636 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
637 | ||
638 | ||
639 | #if defined(__KDEBUG) | |
640 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
641 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
642 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
643 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
644 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
645 | ||
646 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
647 | #define RXRPC_DEBUG_KENTER 0x01 | |
648 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
649 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
650 | #define RXRPC_DEBUG_KPROTO 0x08 | |
651 | #define RXRPC_DEBUG_KNET 0x10 | |
652 | ||
653 | #define _enter(FMT,...) \ | |
654 | do { \ | |
655 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
656 | kenter(FMT,##__VA_ARGS__); \ | |
657 | } while (0) | |
658 | ||
659 | #define _leave(FMT,...) \ | |
660 | do { \ | |
661 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
662 | kleave(FMT,##__VA_ARGS__); \ | |
663 | } while (0) | |
664 | ||
665 | #define _debug(FMT,...) \ | |
666 | do { \ | |
667 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
668 | kdebug(FMT,##__VA_ARGS__); \ | |
669 | } while (0) | |
670 | ||
671 | #define _proto(FMT,...) \ | |
672 | do { \ | |
673 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
674 | kproto(FMT,##__VA_ARGS__); \ | |
675 | } while (0) | |
676 | ||
677 | #define _net(FMT,...) \ | |
678 | do { \ | |
679 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
680 | knet(FMT,##__VA_ARGS__); \ | |
681 | } while (0) | |
682 | ||
683 | #else | |
684 | #define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
685 | #define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
686 | #define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__) | |
687 | #define _proto(FMT,...) _dbprintk("### "FMT ,##__VA_ARGS__) | |
688 | #define _net(FMT,...) _dbprintk("@@@ "FMT ,##__VA_ARGS__) | |
689 | #endif | |
690 | ||
691 | /* | |
692 | * debug assertion checking | |
693 | */ | |
694 | #if 1 // defined(__KDEBUGALL) | |
695 | ||
696 | #define ASSERT(X) \ | |
697 | do { \ | |
698 | if (unlikely(!(X))) { \ | |
699 | printk(KERN_ERR "\n"); \ | |
700 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
701 | BUG(); \ | |
702 | } \ | |
703 | } while(0) | |
704 | ||
705 | #define ASSERTCMP(X, OP, Y) \ | |
706 | do { \ | |
707 | if (unlikely(!((X) OP (Y)))) { \ | |
708 | printk(KERN_ERR "\n"); \ | |
709 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
710 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
711 | (unsigned long)(X), (unsigned long)(Y)); \ | |
712 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
713 | (unsigned long)(X), (unsigned long)(Y)); \ | |
714 | BUG(); \ | |
715 | } \ | |
716 | } while(0) | |
717 | ||
718 | #define ASSERTIF(C, X) \ | |
719 | do { \ | |
720 | if (unlikely((C) && !(X))) { \ | |
721 | printk(KERN_ERR "\n"); \ | |
722 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
723 | BUG(); \ | |
724 | } \ | |
725 | } while(0) | |
726 | ||
727 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
728 | do { \ | |
729 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
730 | printk(KERN_ERR "\n"); \ | |
731 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ | |
732 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
733 | (unsigned long)(X), (unsigned long)(Y)); \ | |
734 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
735 | (unsigned long)(X), (unsigned long)(Y)); \ | |
736 | BUG(); \ | |
737 | } \ | |
738 | } while(0) | |
739 | ||
740 | #else | |
741 | ||
742 | #define ASSERT(X) \ | |
743 | do { \ | |
744 | } while(0) | |
745 | ||
746 | #define ASSERTCMP(X, OP, Y) \ | |
747 | do { \ | |
748 | } while(0) | |
749 | ||
750 | #define ASSERTIF(C, X) \ | |
751 | do { \ | |
752 | } while(0) | |
753 | ||
754 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
755 | do { \ | |
756 | } while(0) | |
757 | ||
758 | #endif /* __KDEBUGALL */ | |
759 | ||
760 | /* | |
761 | * socket buffer accounting / leak finding | |
762 | */ | |
763 | static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) | |
764 | { | |
765 | //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); | |
766 | //atomic_inc(&rxrpc_n_skbs); | |
767 | } | |
768 | ||
769 | #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) | |
770 | ||
771 | static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) | |
772 | { | |
773 | //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); | |
774 | //atomic_dec(&rxrpc_n_skbs); | |
775 | } | |
776 | ||
777 | #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) | |
778 | ||
779 | static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) | |
780 | { | |
781 | if (skb) { | |
782 | CHECK_SLAB_OKAY(&skb->users); | |
783 | //_net("free skb %p %s [%d]", | |
784 | // skb, fn, atomic_read(&rxrpc_n_skbs)); | |
785 | //atomic_dec(&rxrpc_n_skbs); | |
786 | kfree_skb(skb); | |
787 | } | |
788 | } | |
789 | ||
790 | #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) | |
791 | ||
792 | static inline void rxrpc_purge_queue(struct sk_buff_head *list) | |
793 | { | |
794 | struct sk_buff *skb; | |
795 | while ((skb = skb_dequeue((list))) != NULL) | |
796 | rxrpc_free_skb(skb); | |
797 | } | |
798 | ||
799 | static inline void __rxrpc__atomic_inc(atomic_t *v) | |
800 | { | |
801 | CHECK_SLAB_OKAY(v); | |
802 | atomic_inc(v); | |
803 | } | |
804 | ||
805 | #define atomic_inc(v) __rxrpc__atomic_inc((v)) | |
806 | ||
807 | static inline void __rxrpc__atomic_dec(atomic_t *v) | |
808 | { | |
809 | CHECK_SLAB_OKAY(v); | |
810 | atomic_dec(v); | |
811 | } | |
812 | ||
813 | #define atomic_dec(v) __rxrpc__atomic_dec((v)) | |
814 | ||
815 | static inline int __rxrpc__atomic_dec_and_test(atomic_t *v) | |
816 | { | |
817 | CHECK_SLAB_OKAY(v); | |
818 | return atomic_dec_and_test(v); | |
819 | } | |
820 | ||
821 | #define atomic_dec_and_test(v) __rxrpc__atomic_dec_and_test((v)) | |
822 | ||
823 | static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) | |
824 | { | |
825 | CHECK_SLAB_OKAY(&local->usage); | |
826 | if (atomic_inc_return(&local->usage) == 1) | |
827 | printk("resurrected (%s)\n", f); | |
828 | } | |
829 | ||
830 | #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) | |
831 | ||
832 | #define rxrpc_get_call(CALL) \ | |
833 | do { \ | |
834 | CHECK_SLAB_OKAY(&(CALL)->usage); \ | |
835 | if (atomic_inc_return(&(CALL)->usage) == 1) \ | |
836 | BUG(); \ | |
837 | } while(0) | |
838 | ||
839 | #define rxrpc_put_call(CALL) \ | |
840 | do { \ | |
841 | __rxrpc_put_call(CALL); \ | |
842 | } while(0) |