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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 | ||
be6e6707 | 12 | #include <linux/atomic.h> |
8496af50 | 13 | #include <linux/seqlock.h> |
e0e4d82f | 14 | #include <net/sock.h> |
be6e6707 | 15 | #include <net/af_rxrpc.h> |
17926a79 DH |
16 | #include <rxrpc/packet.h> |
17 | ||
18 | #if 0 | |
19 | #define CHECK_SLAB_OKAY(X) \ | |
20 | BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ | |
21 | (POISON_FREE << 8 | POISON_FREE)) | |
22 | #else | |
b4f1342f | 23 | #define CHECK_SLAB_OKAY(X) do {} while (0) |
17926a79 DH |
24 | #endif |
25 | ||
17926a79 DH |
26 | #define FCRYPT_BSIZE 8 |
27 | struct rxrpc_crypt { | |
28 | union { | |
29 | u8 x[FCRYPT_BSIZE]; | |
91e916cf | 30 | __be32 n[2]; |
17926a79 DH |
31 | }; |
32 | } __attribute__((aligned(8))); | |
33 | ||
651350d1 DH |
34 | #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) |
35 | #define rxrpc_queue_delayed_work(WS,D) \ | |
36 | queue_delayed_work(rxrpc_workqueue, (WS), (D)) | |
37 | ||
38 | #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) | |
17926a79 | 39 | |
cc8feb8e DH |
40 | struct rxrpc_connection; |
41 | ||
d001648e DH |
42 | /* |
43 | * Mark applied to socket buffers. | |
44 | */ | |
45 | enum rxrpc_skb_mark { | |
46 | RXRPC_SKB_MARK_DATA, /* data message */ | |
47 | RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ | |
48 | RXRPC_SKB_MARK_BUSY, /* server busy message */ | |
49 | RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ | |
50 | RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ | |
51 | RXRPC_SKB_MARK_NET_ERROR, /* network error message */ | |
52 | RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ | |
53 | RXRPC_SKB_MARK_NEW_CALL, /* local error message */ | |
54 | }; | |
55 | ||
17926a79 DH |
56 | /* |
57 | * sk_state for RxRPC sockets | |
58 | */ | |
59 | enum { | |
2341e077 DH |
60 | RXRPC_UNBOUND = 0, |
61 | RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ | |
17926a79 | 62 | RXRPC_CLIENT_BOUND, /* client local address bound */ |
17926a79 DH |
63 | RXRPC_SERVER_BOUND, /* server local address bound */ |
64 | RXRPC_SERVER_LISTENING, /* server listening for connections */ | |
65 | RXRPC_CLOSE, /* socket is being closed */ | |
66 | }; | |
67 | ||
68 | /* | |
69 | * RxRPC socket definition | |
70 | */ | |
71 | struct rxrpc_sock { | |
72 | /* WARNING: sk has to be the first member */ | |
73 | struct sock sk; | |
d001648e | 74 | rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
17926a79 | 75 | struct rxrpc_local *local; /* local endpoint */ |
17926a79 DH |
76 | struct list_head listen_link; /* link in the local endpoint's listen list */ |
77 | struct list_head secureq; /* calls awaiting connection security clearance */ | |
78 | struct list_head acceptq; /* calls awaiting acceptance */ | |
79 | struct key *key; /* security for this socket */ | |
80 | struct key *securities; /* list of server security descriptors */ | |
81 | struct rb_root calls; /* outstanding calls on this socket */ | |
82 | unsigned long flags; | |
2341e077 | 83 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
17926a79 DH |
84 | rwlock_t call_lock; /* lock for calls */ |
85 | u32 min_sec_level; /* minimum security level */ | |
86 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT | |
cc8feb8e DH |
87 | bool exclusive; /* Exclusive connection for a client socket */ |
88 | sa_family_t family; /* Protocol family created with */ | |
17926a79 | 89 | struct sockaddr_rxrpc srx; /* local address */ |
2341e077 | 90 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
17926a79 DH |
91 | }; |
92 | ||
93 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) | |
94 | ||
0d12f8a4 DH |
95 | /* |
96 | * CPU-byteorder normalised Rx packet header. | |
97 | */ | |
98 | struct rxrpc_host_header { | |
99 | u32 epoch; /* client boot timestamp */ | |
100 | u32 cid; /* connection and channel ID */ | |
101 | u32 callNumber; /* call ID (0 for connection-level packets) */ | |
102 | u32 seq; /* sequence number of pkt in call stream */ | |
103 | u32 serial; /* serial number of pkt sent to network */ | |
104 | u8 type; /* packet type */ | |
105 | u8 flags; /* packet flags */ | |
106 | u8 userStatus; /* app-layer defined status */ | |
107 | u8 securityIndex; /* security protocol ID */ | |
108 | union { | |
109 | u16 _rsvd; /* reserved */ | |
110 | u16 cksum; /* kerberos security checksum */ | |
111 | }; | |
112 | u16 serviceId; /* service ID */ | |
113 | } __packed; | |
114 | ||
17926a79 DH |
115 | /* |
116 | * RxRPC socket buffer private variables | |
117 | * - max 48 bytes (struct sk_buff::cb) | |
118 | */ | |
119 | struct rxrpc_skb_priv { | |
120 | struct rxrpc_call *call; /* call with which associated */ | |
121 | unsigned long resend_at; /* time in jiffies at which to resend */ | |
122 | union { | |
95c96174 | 123 | unsigned int offset; /* offset into buffer of next read */ |
17926a79 DH |
124 | int remain; /* amount of space remaining for next write */ |
125 | u32 error; /* network error code */ | |
126 | bool need_resend; /* T if needs resending */ | |
127 | }; | |
128 | ||
0d12f8a4 | 129 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
17926a79 DH |
130 | }; |
131 | ||
132 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) | |
133 | ||
17926a79 DH |
134 | enum rxrpc_command { |
135 | RXRPC_CMD_SEND_DATA, /* send data message */ | |
136 | RXRPC_CMD_SEND_ABORT, /* request abort generation */ | |
137 | RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ | |
138 | RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ | |
139 | }; | |
140 | ||
141 | /* | |
142 | * RxRPC security module interface | |
143 | */ | |
144 | struct rxrpc_security { | |
17926a79 DH |
145 | const char *name; /* name of this service */ |
146 | u8 security_index; /* security type provided */ | |
147 | ||
648af7fc DH |
148 | /* Initialise a security service */ |
149 | int (*init)(void); | |
150 | ||
151 | /* Clean up a security service */ | |
152 | void (*exit)(void); | |
153 | ||
17926a79 DH |
154 | /* initialise a connection's security */ |
155 | int (*init_connection_security)(struct rxrpc_connection *); | |
156 | ||
157 | /* prime a connection's packet security */ | |
a263629d | 158 | int (*prime_packet_security)(struct rxrpc_connection *); |
17926a79 DH |
159 | |
160 | /* impose security on a packet */ | |
a263629d | 161 | int (*secure_packet)(struct rxrpc_call *, |
17926a79 DH |
162 | struct sk_buff *, |
163 | size_t, | |
164 | void *); | |
165 | ||
166 | /* verify the security on a received packet */ | |
a263629d | 167 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *); |
17926a79 DH |
168 | |
169 | /* issue a challenge */ | |
170 | int (*issue_challenge)(struct rxrpc_connection *); | |
171 | ||
172 | /* respond to a challenge */ | |
173 | int (*respond_to_challenge)(struct rxrpc_connection *, | |
174 | struct sk_buff *, | |
175 | u32 *); | |
176 | ||
177 | /* verify a response */ | |
178 | int (*verify_response)(struct rxrpc_connection *, | |
179 | struct sk_buff *, | |
180 | u32 *); | |
181 | ||
182 | /* clear connection security */ | |
183 | void (*clear)(struct rxrpc_connection *); | |
184 | }; | |
185 | ||
186 | /* | |
4f95dd78 DH |
187 | * RxRPC local transport endpoint description |
188 | * - owned by a single AF_RXRPC socket | |
189 | * - pointed to by transport socket struct sk_user_data | |
17926a79 DH |
190 | */ |
191 | struct rxrpc_local { | |
4f95dd78 DH |
192 | struct rcu_head rcu; |
193 | atomic_t usage; | |
194 | struct list_head link; | |
17926a79 | 195 | struct socket *socket; /* my UDP socket */ |
4f95dd78 | 196 | struct work_struct processor; |
17926a79 | 197 | struct list_head services; /* services listening on this endpoint */ |
17926a79 DH |
198 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
199 | struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ | |
200 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ | |
44ba0698 | 201 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
999b69f8 DH |
202 | struct rb_root client_conns; /* Client connections by socket params */ |
203 | spinlock_t client_conns_lock; /* Lock for client_conns */ | |
17926a79 DH |
204 | spinlock_t lock; /* access lock */ |
205 | rwlock_t services_lock; /* lock for services list */ | |
17926a79 | 206 | int debug_id; /* debug ID for printks */ |
4f95dd78 | 207 | bool dead; |
17926a79 DH |
208 | struct sockaddr_rxrpc srx; /* local address */ |
209 | }; | |
210 | ||
211 | /* | |
212 | * RxRPC remote transport endpoint definition | |
be6e6707 | 213 | * - matched by local endpoint, remote port, address and protocol type |
17926a79 DH |
214 | */ |
215 | struct rxrpc_peer { | |
be6e6707 DH |
216 | struct rcu_head rcu; /* This must be first */ |
217 | atomic_t usage; | |
218 | unsigned long hash_key; | |
219 | struct hlist_node hash_link; | |
220 | struct rxrpc_local *local; | |
f66d7490 DH |
221 | struct hlist_head error_targets; /* targets for net error distribution */ |
222 | struct work_struct error_distributor; | |
aa390bbe | 223 | struct rb_root service_conns; /* Service connections */ |
8496af50 | 224 | seqlock_t service_conn_lock; |
17926a79 | 225 | spinlock_t lock; /* access lock */ |
95c96174 ED |
226 | unsigned int if_mtu; /* interface MTU for this peer */ |
227 | unsigned int mtu; /* network MTU for this peer */ | |
228 | unsigned int maxdata; /* data size (MTU - hdrsize) */ | |
17926a79 DH |
229 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
230 | int debug_id; /* debug ID for printks */ | |
f66d7490 DH |
231 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
232 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 | |
17926a79 DH |
233 | struct sockaddr_rxrpc srx; /* remote address */ |
234 | ||
235 | /* calculated RTT cache */ | |
236 | #define RXRPC_RTT_CACHE_SIZE 32 | |
237 | suseconds_t rtt; /* current RTT estimate (in uS) */ | |
95c96174 ED |
238 | unsigned int rtt_point; /* next entry at which to insert */ |
239 | unsigned int rtt_usage; /* amount of cache actually used */ | |
17926a79 DH |
240 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
241 | }; | |
242 | ||
19ffa01c DH |
243 | /* |
244 | * Keys for matching a connection. | |
245 | */ | |
246 | struct rxrpc_conn_proto { | |
e8d70ce1 DH |
247 | union { |
248 | struct { | |
249 | u32 epoch; /* epoch of this connection */ | |
250 | u32 cid; /* connection ID */ | |
251 | }; | |
252 | u64 index_key; | |
19ffa01c DH |
253 | }; |
254 | }; | |
255 | ||
256 | struct rxrpc_conn_parameters { | |
257 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
258 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
259 | struct key *key; /* Security details */ | |
260 | bool exclusive; /* T if conn is exclusive */ | |
261 | u16 service_id; /* Service ID for this connection */ | |
262 | u32 security_level; /* Security level selected */ | |
263 | }; | |
264 | ||
bba304db DH |
265 | /* |
266 | * Bits in the connection flags. | |
267 | */ | |
268 | enum rxrpc_conn_flag { | |
269 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ | |
001c1122 DH |
270 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
271 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ | |
45025bce DH |
272 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
273 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ | |
274 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ | |
bba304db DH |
275 | }; |
276 | ||
277 | /* | |
278 | * Events that can be raised upon a connection. | |
279 | */ | |
280 | enum rxrpc_conn_event { | |
281 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ | |
282 | }; | |
283 | ||
45025bce DH |
284 | /* |
285 | * The connection cache state. | |
286 | */ | |
287 | enum rxrpc_conn_cache_state { | |
288 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ | |
289 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ | |
290 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ | |
291 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ | |
292 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ | |
293 | }; | |
294 | ||
bba304db DH |
295 | /* |
296 | * The connection protocol state. | |
297 | */ | |
298 | enum rxrpc_conn_proto_state { | |
299 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ | |
300 | RXRPC_CONN_CLIENT, /* Client connection */ | |
301 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ | |
302 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ | |
303 | RXRPC_CONN_SERVICE, /* Service secured connection */ | |
304 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ | |
305 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ | |
bba304db DH |
306 | RXRPC_CONN__NR_STATES |
307 | }; | |
308 | ||
17926a79 DH |
309 | /* |
310 | * RxRPC connection definition | |
aa390bbe | 311 | * - matched by { local, peer, epoch, conn_id, direction } |
17926a79 DH |
312 | * - each connection can only handle four simultaneous calls |
313 | */ | |
314 | struct rxrpc_connection { | |
19ffa01c DH |
315 | struct rxrpc_conn_proto proto; |
316 | struct rxrpc_conn_parameters params; | |
317 | ||
45025bce DH |
318 | atomic_t usage; |
319 | struct rcu_head rcu; | |
320 | struct list_head cache_link; | |
a1399f8b | 321 | |
45025bce DH |
322 | spinlock_t channel_lock; |
323 | unsigned char active_chans; /* Mask of active channels */ | |
324 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) | |
325 | struct list_head waiting_calls; /* Calls waiting for channels */ | |
a1399f8b DH |
326 | struct rxrpc_channel { |
327 | struct rxrpc_call __rcu *call; /* Active call */ | |
328 | u32 call_id; /* ID of current call */ | |
329 | u32 call_counter; /* Call ID counter */ | |
330 | u32 last_call; /* ID of last call */ | |
18bfeba5 DH |
331 | u8 last_type; /* Type of last packet */ |
332 | u16 last_service_id; | |
333 | union { | |
334 | u32 last_seq; | |
335 | u32 last_abort; | |
336 | }; | |
a1399f8b | 337 | } channels[RXRPC_MAXCALLS]; |
999b69f8 | 338 | |
17926a79 | 339 | struct work_struct processor; /* connection event processor */ |
999b69f8 DH |
340 | union { |
341 | struct rb_node client_node; /* Node in local->client_conns */ | |
aa390bbe | 342 | struct rb_node service_node; /* Node in peer->service_conns */ |
999b69f8 | 343 | }; |
4d028b2c | 344 | struct list_head proc_link; /* link in procfs list */ |
17926a79 | 345 | struct list_head link; /* link in master connection list */ |
17926a79 | 346 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
648af7fc | 347 | const struct rxrpc_security *security; /* applied security module */ |
17926a79 | 348 | struct key *server_key; /* security for this service */ |
1afe593b | 349 | struct crypto_skcipher *cipher; /* encryption handle */ |
17926a79 | 350 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
4a3388c8 | 351 | unsigned long flags; |
17926a79 | 352 | unsigned long events; |
f51b4480 | 353 | unsigned long idle_timestamp; /* Time at which last became idle */ |
17926a79 | 354 | spinlock_t state_lock; /* state-change lock */ |
45025bce | 355 | enum rxrpc_conn_cache_state cache_state : 8; |
bba304db | 356 | enum rxrpc_conn_proto_state state : 8; /* current state of connection */ |
dc44b3a0 DH |
357 | u32 local_abort; /* local abort code */ |
358 | u32 remote_abort; /* remote abort code */ | |
17926a79 | 359 | int debug_id; /* debug ID for printks */ |
17926a79 | 360 | atomic_t serial; /* packet serial number counter */ |
563ea7d5 | 361 | unsigned int hi_serial; /* highest serial number received */ |
17926a79 DH |
362 | u8 size_align; /* data size alignment (for security) */ |
363 | u8 header_size; /* rxrpc + security header size */ | |
364 | u8 security_size; /* security header size */ | |
17926a79 | 365 | u32 security_nonce; /* response re-use preventer */ |
17926a79 | 366 | u8 security_ix; /* security type */ |
17926a79 DH |
367 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
368 | }; | |
369 | ||
5b8848d1 DH |
370 | /* |
371 | * Flags in call->flags. | |
372 | */ | |
373 | enum rxrpc_call_flag { | |
374 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ | |
375 | RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ | |
376 | RXRPC_CALL_RCVD_LAST, /* all packets received */ | |
377 | RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ | |
378 | RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ | |
5b8848d1 DH |
379 | RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ |
380 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ | |
381 | RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ | |
dabe5a79 | 382 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
45025bce | 383 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
d001648e | 384 | RXRPC_CALL_RX_NO_MORE, /* Don't indicate MSG_MORE from recvmsg() */ |
5b8848d1 DH |
385 | }; |
386 | ||
387 | /* | |
388 | * Events that can be raised on a call. | |
389 | */ | |
390 | enum rxrpc_call_event { | |
4c198ad1 DH |
391 | RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ |
392 | RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ | |
393 | RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ | |
394 | RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ | |
395 | RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ | |
396 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ | |
397 | RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ | |
398 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ | |
399 | RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ | |
400 | RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ | |
401 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ | |
402 | RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ | |
403 | RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ | |
404 | RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ | |
405 | RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ | |
406 | RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ | |
407 | RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ | |
5b8848d1 DH |
408 | }; |
409 | ||
410 | /* | |
411 | * The states that a call can be in. | |
412 | */ | |
413 | enum rxrpc_call_state { | |
999b69f8 DH |
414 | RXRPC_CALL_UNINITIALISED, |
415 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ | |
5b8848d1 DH |
416 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
417 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ | |
418 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ | |
419 | RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ | |
420 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ | |
421 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ | |
422 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ | |
423 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ | |
424 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ | |
425 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ | |
f5c17aae DH |
426 | RXRPC_CALL_COMPLETE, /* - call complete */ |
427 | RXRPC_CALL_DEAD, /* - call is dead */ | |
428 | NR__RXRPC_CALL_STATES | |
429 | }; | |
430 | ||
431 | /* | |
432 | * Call completion condition (state == RXRPC_CALL_COMPLETE). | |
433 | */ | |
434 | enum rxrpc_call_completion { | |
435 | RXRPC_CALL_SUCCEEDED, /* - Normal termination */ | |
5b8848d1 DH |
436 | RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ |
437 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ | |
438 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ | |
f5c17aae | 439 | RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ |
5b8848d1 | 440 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
f5c17aae | 441 | NR__RXRPC_CALL_COMPLETIONS |
5b8848d1 DH |
442 | }; |
443 | ||
17926a79 DH |
444 | /* |
445 | * RxRPC call definition | |
446 | * - matched by { connection, call_id } | |
447 | */ | |
448 | struct rxrpc_call { | |
dee46364 | 449 | struct rcu_head rcu; |
17926a79 | 450 | struct rxrpc_connection *conn; /* connection carrying call */ |
df5d8bf7 | 451 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
17926a79 DH |
452 | struct rxrpc_sock *socket; /* socket responsible */ |
453 | struct timer_list lifetimer; /* lifetime remaining on call */ | |
454 | struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ | |
455 | struct timer_list ack_timer; /* ACK generation timer */ | |
456 | struct timer_list resend_timer; /* Tx resend timer */ | |
457 | struct work_struct destroyer; /* call destroyer */ | |
458 | struct work_struct processor; /* packet processor and ACK generator */ | |
d001648e | 459 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
17926a79 | 460 | struct list_head link; /* link in master call list */ |
45025bce | 461 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
f66d7490 | 462 | struct hlist_node error_link; /* link in error distribution list */ |
17926a79 DH |
463 | struct list_head accept_link; /* calls awaiting acceptance */ |
464 | struct rb_node sock_node; /* node in socket call tree */ | |
17926a79 DH |
465 | struct sk_buff_head rx_queue; /* received packets */ |
466 | struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ | |
d001648e | 467 | struct sk_buff_head knlrecv_queue; /* Queue for kernel_recv [TODO: replace this] */ |
17926a79 | 468 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
45025bce | 469 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
a263629d | 470 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
17926a79 DH |
471 | unsigned long user_call_ID; /* user-defined call ID */ |
472 | unsigned long creation_jif; /* time of call creation */ | |
473 | unsigned long flags; | |
17926a79 | 474 | unsigned long events; |
17926a79 DH |
475 | spinlock_t lock; |
476 | rwlock_t state_lock; /* lock for state transition */ | |
f5c17aae DH |
477 | u32 abort_code; /* Local/remote abort code */ |
478 | int error; /* Local error incurred */ | |
479 | enum rxrpc_call_state state : 8; /* current state of call */ | |
480 | enum rxrpc_call_completion completion : 8; /* Call completion condition */ | |
17926a79 | 481 | atomic_t usage; |
372ee163 | 482 | atomic_t skb_count; /* Outstanding packets on this call */ |
17926a79 | 483 | atomic_t sequence; /* Tx data packet sequence counter */ |
dabe5a79 DH |
484 | u16 service_id; /* service ID */ |
485 | u32 call_id; /* call ID on connection */ | |
486 | u32 cid; /* connection ID plus channel index */ | |
487 | int debug_id; /* debug ID for printks */ | |
17926a79 DH |
488 | |
489 | /* transmission-phase ACK management */ | |
4e36a95e DH |
490 | u8 acks_head; /* offset into window of first entry */ |
491 | u8 acks_tail; /* offset into window of last entry */ | |
492 | u8 acks_winsz; /* size of un-ACK'd window */ | |
493 | u8 acks_unacked; /* lowest unacked packet in last ACK received */ | |
17926a79 DH |
494 | int acks_latest; /* serial number of latest ACK received */ |
495 | rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ | |
496 | unsigned long *acks_window; /* sent packet window | |
497 | * - elements are pointers with LSB set if ACK'd | |
498 | */ | |
499 | ||
500 | /* receive-phase ACK management */ | |
501 | rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ | |
502 | rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ | |
503 | rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ | |
504 | rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ | |
505 | rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ | |
506 | rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ | |
0d12f8a4 | 507 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
4e36a95e | 508 | u8 ackr_reason; /* reason to ACK */ |
563ea7d5 | 509 | u16 ackr_skew; /* skew on packet being ACK'd */ |
0d12f8a4 | 510 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
17926a79 DH |
511 | atomic_t ackr_not_idle; /* number of packets in Rx queue */ |
512 | ||
513 | /* received packet records, 1 bit per record */ | |
514 | #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) | |
515 | unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; | |
17926a79 DH |
516 | }; |
517 | ||
df844fd4 DH |
518 | #include <trace/events/rxrpc.h> |
519 | ||
17926a79 | 520 | /* |
651350d1 | 521 | * af_rxrpc.c |
17926a79 | 522 | */ |
651350d1 | 523 | extern atomic_t rxrpc_n_skbs; |
0d12f8a4 | 524 | extern u32 rxrpc_epoch; |
651350d1 DH |
525 | extern atomic_t rxrpc_debug_id; |
526 | extern struct workqueue_struct *rxrpc_workqueue; | |
17926a79 DH |
527 | |
528 | /* | |
0d81a51a | 529 | * call_accept.c |
17926a79 | 530 | */ |
4f95dd78 | 531 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
d001648e DH |
532 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
533 | rxrpc_notify_rx_t); | |
c1b1203d | 534 | int rxrpc_reject_call(struct rxrpc_sock *); |
17926a79 DH |
535 | |
536 | /* | |
0d81a51a | 537 | * call_event.c |
17926a79 | 538 | */ |
563ea7d5 DH |
539 | void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); |
540 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); | |
c1b1203d | 541 | void rxrpc_process_call(struct work_struct *); |
17926a79 DH |
542 | |
543 | /* | |
0d81a51a | 544 | * call_object.c |
17926a79 | 545 | */ |
f5c17aae DH |
546 | extern const char *const rxrpc_call_states[]; |
547 | extern const char *const rxrpc_call_completions[]; | |
dad8aff7 DH |
548 | extern unsigned int rxrpc_max_call_lifetime; |
549 | extern unsigned int rxrpc_dead_call_expiry; | |
17926a79 DH |
550 | extern struct kmem_cache *rxrpc_call_jar; |
551 | extern struct list_head rxrpc_calls; | |
552 | extern rwlock_t rxrpc_call_lock; | |
553 | ||
2341e077 DH |
554 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
555 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, | |
19ffa01c | 556 | struct rxrpc_conn_parameters *, |
999b69f8 | 557 | struct sockaddr_rxrpc *, |
2341e077 | 558 | unsigned long, gfp_t); |
c1b1203d JP |
559 | struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, |
560 | struct rxrpc_connection *, | |
42886ffe | 561 | struct sk_buff *); |
c1b1203d JP |
562 | void rxrpc_release_call(struct rxrpc_call *); |
563 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); | |
e34d4234 DH |
564 | void rxrpc_see_call(struct rxrpc_call *); |
565 | void rxrpc_get_call(struct rxrpc_call *); | |
566 | void rxrpc_put_call(struct rxrpc_call *); | |
567 | void rxrpc_get_call_for_skb(struct rxrpc_call *, struct sk_buff *); | |
568 | void rxrpc_put_call_for_skb(struct rxrpc_call *, struct sk_buff *); | |
c1b1203d | 569 | void __exit rxrpc_destroy_all_calls(void); |
17926a79 | 570 | |
dabe5a79 DH |
571 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
572 | { | |
573 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); | |
574 | } | |
575 | ||
576 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) | |
577 | { | |
578 | return !rxrpc_is_service_call(call); | |
579 | } | |
580 | ||
f5c17aae DH |
581 | /* |
582 | * Transition a call to the complete state. | |
583 | */ | |
584 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, | |
585 | enum rxrpc_call_completion compl, | |
586 | u32 abort_code, | |
587 | int error) | |
588 | { | |
589 | if (call->state < RXRPC_CALL_COMPLETE) { | |
590 | call->abort_code = abort_code; | |
591 | call->error = error; | |
592 | call->completion = compl, | |
593 | call->state = RXRPC_CALL_COMPLETE; | |
594 | return true; | |
595 | } | |
596 | return false; | |
597 | } | |
598 | ||
599 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, | |
600 | enum rxrpc_call_completion compl, | |
601 | u32 abort_code, | |
602 | int error) | |
603 | { | |
604 | int ret; | |
605 | ||
606 | write_lock_bh(&call->state_lock); | |
607 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); | |
608 | write_unlock_bh(&call->state_lock); | |
609 | return ret; | |
610 | } | |
611 | ||
612 | /* | |
613 | * Record that a call successfully completed. | |
614 | */ | |
615 | static inline void __rxrpc_call_completed(struct rxrpc_call *call) | |
616 | { | |
617 | __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); | |
618 | } | |
619 | ||
620 | static inline void rxrpc_call_completed(struct rxrpc_call *call) | |
621 | { | |
622 | write_lock_bh(&call->state_lock); | |
623 | __rxrpc_call_completed(call); | |
624 | write_unlock_bh(&call->state_lock); | |
625 | } | |
626 | ||
627 | /* | |
628 | * Record that a call is locally aborted. | |
629 | */ | |
630 | static inline bool __rxrpc_abort_call(struct rxrpc_call *call, | |
631 | u32 abort_code, int error) | |
632 | { | |
633 | if (__rxrpc_set_call_completion(call, | |
634 | RXRPC_CALL_LOCALLY_ABORTED, | |
635 | abort_code, error)) { | |
636 | set_bit(RXRPC_CALL_EV_ABORT, &call->events); | |
637 | return true; | |
638 | } | |
639 | return false; | |
640 | } | |
641 | ||
642 | static inline bool rxrpc_abort_call(struct rxrpc_call *call, | |
643 | u32 abort_code, int error) | |
644 | { | |
645 | bool ret; | |
646 | ||
647 | write_lock_bh(&call->state_lock); | |
648 | ret = __rxrpc_abort_call(call, abort_code, error); | |
649 | write_unlock_bh(&call->state_lock); | |
650 | return ret; | |
651 | } | |
652 | ||
4a3388c8 DH |
653 | /* |
654 | * conn_client.c | |
655 | */ | |
45025bce DH |
656 | extern unsigned int rxrpc_max_client_connections; |
657 | extern unsigned int rxrpc_reap_client_connections; | |
658 | extern unsigned int rxrpc_conn_idle_client_expiry; | |
659 | extern unsigned int rxrpc_conn_idle_client_fast_expiry; | |
4a3388c8 DH |
660 | extern struct idr rxrpc_client_conn_ids; |
661 | ||
eb9b9d22 | 662 | void rxrpc_destroy_client_conn_ids(void); |
c6d2b8d7 DH |
663 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
664 | struct sockaddr_rxrpc *, gfp_t); | |
45025bce DH |
665 | void rxrpc_expose_client_call(struct rxrpc_call *); |
666 | void rxrpc_disconnect_client_call(struct rxrpc_call *); | |
667 | void rxrpc_put_client_conn(struct rxrpc_connection *); | |
668 | void __exit rxrpc_destroy_all_client_connections(void); | |
4a3388c8 | 669 | |
17926a79 | 670 | /* |
0d81a51a DH |
671 | * conn_event.c |
672 | */ | |
673 | void rxrpc_process_connection(struct work_struct *); | |
674 | void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); | |
4f95dd78 | 675 | void rxrpc_reject_packets(struct rxrpc_local *); |
0d81a51a DH |
676 | |
677 | /* | |
678 | * conn_object.c | |
17926a79 | 679 | */ |
dad8aff7 | 680 | extern unsigned int rxrpc_connection_expiry; |
17926a79 | 681 | extern struct list_head rxrpc_connections; |
4d028b2c | 682 | extern struct list_head rxrpc_connection_proc_list; |
17926a79 DH |
683 | extern rwlock_t rxrpc_connection_lock; |
684 | ||
8496af50 | 685 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
c6d2b8d7 | 686 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
8496af50 DH |
687 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
688 | struct sk_buff *); | |
45025bce | 689 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
999b69f8 | 690 | void rxrpc_disconnect_call(struct rxrpc_call *); |
45025bce | 691 | void rxrpc_kill_connection(struct rxrpc_connection *); |
f51b4480 | 692 | void __rxrpc_put_connection(struct rxrpc_connection *); |
c1b1203d | 693 | void __exit rxrpc_destroy_all_connections(void); |
17926a79 | 694 | |
19ffa01c DH |
695 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
696 | { | |
697 | return conn->out_clientflag; | |
698 | } | |
699 | ||
700 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) | |
701 | { | |
e8d70ce1 | 702 | return !rxrpc_conn_is_client(conn); |
19ffa01c DH |
703 | } |
704 | ||
5627cc8b DH |
705 | static inline void rxrpc_get_connection(struct rxrpc_connection *conn) |
706 | { | |
707 | atomic_inc(&conn->usage); | |
708 | } | |
709 | ||
2c4579e4 DH |
710 | static inline |
711 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) | |
712 | { | |
713 | return atomic_inc_not_zero(&conn->usage) ? conn : NULL; | |
714 | } | |
5acbee46 | 715 | |
f51b4480 DH |
716 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
717 | { | |
45025bce DH |
718 | if (!conn) |
719 | return; | |
720 | ||
721 | if (rxrpc_conn_is_client(conn)) { | |
722 | if (atomic_dec_and_test(&conn->usage)) | |
723 | rxrpc_put_client_conn(conn); | |
724 | } else { | |
725 | if (atomic_dec_return(&conn->usage) == 1) | |
726 | __rxrpc_put_connection(conn); | |
727 | } | |
f51b4480 DH |
728 | } |
729 | ||
730 | ||
8496af50 | 731 | static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
5acbee46 | 732 | { |
8496af50 DH |
733 | if (!rxrpc_get_connection_maybe(conn)) |
734 | return false; | |
735 | if (!rxrpc_queue_work(&conn->processor)) | |
2c4579e4 | 736 | rxrpc_put_connection(conn); |
8496af50 | 737 | return true; |
5acbee46 DH |
738 | } |
739 | ||
7877a4a4 DH |
740 | /* |
741 | * conn_service.c | |
742 | */ | |
8496af50 DH |
743 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
744 | struct sk_buff *); | |
7877a4a4 | 745 | struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, |
d991b4a3 | 746 | struct sockaddr_rxrpc *, |
7877a4a4 | 747 | struct sk_buff *); |
001c1122 | 748 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
7877a4a4 | 749 | |
17926a79 | 750 | /* |
0d81a51a | 751 | * input.c |
17926a79 | 752 | */ |
0d81a51a DH |
753 | void rxrpc_data_ready(struct sock *); |
754 | int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); | |
755 | void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); | |
17926a79 DH |
756 | |
757 | /* | |
0d81a51a | 758 | * insecure.c |
17926a79 | 759 | */ |
0d81a51a | 760 | extern const struct rxrpc_security rxrpc_no_security; |
17926a79 DH |
761 | |
762 | /* | |
0d81a51a | 763 | * key.c |
17926a79 | 764 | */ |
0d81a51a DH |
765 | extern struct key_type key_type_rxrpc; |
766 | extern struct key_type key_type_rxrpc_s; | |
767 | ||
768 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); | |
769 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
770 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, | |
771 | u32); | |
17926a79 | 772 | |
87563616 DH |
773 | /* |
774 | * local_event.c | |
775 | */ | |
4f95dd78 | 776 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
87563616 | 777 | |
17926a79 | 778 | /* |
0d81a51a | 779 | * local_object.c |
17926a79 | 780 | */ |
4f95dd78 DH |
781 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
782 | void __rxrpc_put_local(struct rxrpc_local *); | |
c1b1203d | 783 | void __exit rxrpc_destroy_all_locals(void); |
17926a79 | 784 | |
4f95dd78 DH |
785 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
786 | { | |
787 | atomic_inc(&local->usage); | |
788 | } | |
789 | ||
790 | static inline | |
791 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) | |
792 | { | |
793 | return atomic_inc_not_zero(&local->usage) ? local : NULL; | |
794 | } | |
795 | ||
796 | static inline void rxrpc_put_local(struct rxrpc_local *local) | |
797 | { | |
5627cc8b | 798 | if (local && atomic_dec_and_test(&local->usage)) |
4f95dd78 DH |
799 | __rxrpc_put_local(local); |
800 | } | |
801 | ||
5acbee46 DH |
802 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
803 | { | |
804 | rxrpc_queue_work(&local->processor); | |
805 | } | |
806 | ||
17926a79 | 807 | /* |
0d81a51a | 808 | * misc.c |
17926a79 | 809 | */ |
0d81a51a DH |
810 | extern unsigned int rxrpc_max_backlog __read_mostly; |
811 | extern unsigned int rxrpc_requested_ack_delay; | |
812 | extern unsigned int rxrpc_soft_ack_delay; | |
813 | extern unsigned int rxrpc_idle_ack_delay; | |
814 | extern unsigned int rxrpc_rx_window_size; | |
815 | extern unsigned int rxrpc_rx_mtu; | |
816 | extern unsigned int rxrpc_rx_jumbo_max; | |
17926a79 | 817 | |
0d81a51a DH |
818 | extern const char *const rxrpc_pkts[]; |
819 | extern const s8 rxrpc_ack_priority[]; | |
820 | ||
821 | extern const char *rxrpc_acks(u8 reason); | |
17926a79 DH |
822 | |
823 | /* | |
0d81a51a | 824 | * output.c |
17926a79 | 825 | */ |
dad8aff7 | 826 | extern unsigned int rxrpc_resend_timeout; |
17926a79 | 827 | |
985a5c82 | 828 | int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); |
2341e077 | 829 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
17926a79 DH |
830 | |
831 | /* | |
abe89ef0 | 832 | * peer_event.c |
0d81a51a | 833 | */ |
abe89ef0 | 834 | void rxrpc_error_report(struct sock *); |
f66d7490 | 835 | void rxrpc_peer_error_distributor(struct work_struct *); |
0d81a51a DH |
836 | |
837 | /* | |
838 | * peer_object.c | |
17926a79 | 839 | */ |
be6e6707 DH |
840 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
841 | const struct sockaddr_rxrpc *); | |
842 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, | |
843 | struct sockaddr_rxrpc *, gfp_t); | |
844 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); | |
845 | ||
df5d8bf7 | 846 | static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
be6e6707 DH |
847 | { |
848 | atomic_inc(&peer->usage); | |
df5d8bf7 | 849 | return peer; |
be6e6707 DH |
850 | } |
851 | ||
852 | static inline | |
853 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) | |
854 | { | |
855 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; | |
856 | } | |
857 | ||
858 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); | |
859 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) | |
860 | { | |
5627cc8b | 861 | if (peer && atomic_dec_and_test(&peer->usage)) |
be6e6707 DH |
862 | __rxrpc_put_peer(peer); |
863 | } | |
17926a79 DH |
864 | |
865 | /* | |
0d81a51a | 866 | * proc.c |
17926a79 | 867 | */ |
036c2e27 JE |
868 | extern const struct file_operations rxrpc_call_seq_fops; |
869 | extern const struct file_operations rxrpc_connection_seq_fops; | |
17926a79 DH |
870 | |
871 | /* | |
0d81a51a | 872 | * recvmsg.c |
17926a79 | 873 | */ |
c1b1203d | 874 | void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); |
1b784140 | 875 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
17926a79 DH |
876 | |
877 | /* | |
0d81a51a DH |
878 | * rxkad.c |
879 | */ | |
880 | #ifdef CONFIG_RXKAD | |
881 | extern const struct rxrpc_security rxkad; | |
882 | #endif | |
883 | ||
884 | /* | |
885 | * security.c | |
17926a79 | 886 | */ |
648af7fc DH |
887 | int __init rxrpc_init_security(void); |
888 | void rxrpc_exit_security(void); | |
c1b1203d JP |
889 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
890 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); | |
17926a79 DH |
891 | |
892 | /* | |
0d81a51a | 893 | * skbuff.c |
17926a79 | 894 | */ |
d001648e | 895 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
c1b1203d | 896 | void rxrpc_packet_destructor(struct sk_buff *); |
df844fd4 DH |
897 | void rxrpc_new_skb(struct sk_buff *); |
898 | void rxrpc_see_skb(struct sk_buff *); | |
899 | void rxrpc_get_skb(struct sk_buff *); | |
900 | void rxrpc_free_skb(struct sk_buff *); | |
901 | void rxrpc_purge_queue(struct sk_buff_head *); | |
17926a79 | 902 | |
5873c083 DH |
903 | /* |
904 | * sysctl.c | |
905 | */ | |
906 | #ifdef CONFIG_SYSCTL | |
907 | extern int __init rxrpc_sysctl_init(void); | |
908 | extern void rxrpc_sysctl_exit(void); | |
909 | #else | |
910 | static inline int __init rxrpc_sysctl_init(void) { return 0; } | |
911 | static inline void rxrpc_sysctl_exit(void) {} | |
912 | #endif | |
913 | ||
be6e6707 DH |
914 | /* |
915 | * utils.c | |
916 | */ | |
d991b4a3 | 917 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
be6e6707 | 918 | |
17926a79 DH |
919 | /* |
920 | * debug tracing | |
921 | */ | |
95c96174 | 922 | extern unsigned int rxrpc_debug; |
17926a79 DH |
923 | |
924 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 925 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 926 | |
0dc47877 HH |
927 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
928 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 DH |
929 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
930 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
931 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
932 | ||
933 | ||
934 | #if defined(__KDEBUG) | |
935 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
936 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
937 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
938 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
939 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
940 | ||
941 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
942 | #define RXRPC_DEBUG_KENTER 0x01 | |
943 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
944 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
945 | #define RXRPC_DEBUG_KPROTO 0x08 | |
946 | #define RXRPC_DEBUG_KNET 0x10 | |
947 | ||
948 | #define _enter(FMT,...) \ | |
949 | do { \ | |
950 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
951 | kenter(FMT,##__VA_ARGS__); \ | |
952 | } while (0) | |
953 | ||
954 | #define _leave(FMT,...) \ | |
955 | do { \ | |
956 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
957 | kleave(FMT,##__VA_ARGS__); \ | |
958 | } while (0) | |
959 | ||
960 | #define _debug(FMT,...) \ | |
961 | do { \ | |
962 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
963 | kdebug(FMT,##__VA_ARGS__); \ | |
964 | } while (0) | |
965 | ||
966 | #define _proto(FMT,...) \ | |
967 | do { \ | |
968 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
969 | kproto(FMT,##__VA_ARGS__); \ | |
970 | } while (0) | |
971 | ||
972 | #define _net(FMT,...) \ | |
973 | do { \ | |
974 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
975 | knet(FMT,##__VA_ARGS__); \ | |
976 | } while (0) | |
977 | ||
978 | #else | |
12fdff3f DH |
979 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
980 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
981 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
982 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) | |
983 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) | |
17926a79 DH |
984 | #endif |
985 | ||
986 | /* | |
987 | * debug assertion checking | |
988 | */ | |
989 | #if 1 // defined(__KDEBUGALL) | |
990 | ||
991 | #define ASSERT(X) \ | |
992 | do { \ | |
993 | if (unlikely(!(X))) { \ | |
9b6d5398 | 994 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
995 | BUG(); \ |
996 | } \ | |
b4f1342f | 997 | } while (0) |
17926a79 DH |
998 | |
999 | #define ASSERTCMP(X, OP, Y) \ | |
1000 | do { \ | |
9b6d5398 JP |
1001 | unsigned long _x = (unsigned long)(X); \ |
1002 | unsigned long _y = (unsigned long)(Y); \ | |
1003 | if (unlikely(!(_x OP _y))) { \ | |
1004 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
1005 | _x, _x, #OP, _y, _y); \ | |
17926a79 DH |
1006 | BUG(); \ |
1007 | } \ | |
b4f1342f | 1008 | } while (0) |
17926a79 DH |
1009 | |
1010 | #define ASSERTIF(C, X) \ | |
1011 | do { \ | |
1012 | if (unlikely((C) && !(X))) { \ | |
9b6d5398 | 1013 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1014 | BUG(); \ |
1015 | } \ | |
b4f1342f | 1016 | } while (0) |
17926a79 DH |
1017 | |
1018 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1019 | do { \ | |
9b6d5398 JP |
1020 | unsigned long _x = (unsigned long)(X); \ |
1021 | unsigned long _y = (unsigned long)(Y); \ | |
1022 | if (unlikely((C) && !(_x OP _y))) { \ | |
1023 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
1024 | _x, _x, #OP, _y, _y); \ | |
17926a79 DH |
1025 | BUG(); \ |
1026 | } \ | |
b4f1342f | 1027 | } while (0) |
17926a79 DH |
1028 | |
1029 | #else | |
1030 | ||
1031 | #define ASSERT(X) \ | |
1032 | do { \ | |
b4f1342f | 1033 | } while (0) |
17926a79 DH |
1034 | |
1035 | #define ASSERTCMP(X, OP, Y) \ | |
1036 | do { \ | |
b4f1342f | 1037 | } while (0) |
17926a79 DH |
1038 | |
1039 | #define ASSERTIF(C, X) \ | |
1040 | do { \ | |
b4f1342f | 1041 | } while (0) |
17926a79 DH |
1042 | |
1043 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1044 | do { \ | |
b4f1342f | 1045 | } while (0) |
17926a79 DH |
1046 | |
1047 | #endif /* __KDEBUGALL */ |