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