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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 | ||
cc8feb8e DH |
38 | struct rxrpc_connection; |
39 | ||
d001648e DH |
40 | /* |
41 | * Mark applied to socket buffers. | |
42 | */ | |
43 | enum rxrpc_skb_mark { | |
44 | RXRPC_SKB_MARK_DATA, /* data message */ | |
45 | RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ | |
46 | RXRPC_SKB_MARK_BUSY, /* server busy message */ | |
47 | RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ | |
48 | RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ | |
49 | RXRPC_SKB_MARK_NET_ERROR, /* network error message */ | |
50 | RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ | |
51 | RXRPC_SKB_MARK_NEW_CALL, /* local error message */ | |
52 | }; | |
53 | ||
17926a79 DH |
54 | /* |
55 | * sk_state for RxRPC sockets | |
56 | */ | |
57 | enum { | |
2341e077 DH |
58 | RXRPC_UNBOUND = 0, |
59 | RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ | |
17926a79 | 60 | RXRPC_CLIENT_BOUND, /* client local address bound */ |
17926a79 DH |
61 | RXRPC_SERVER_BOUND, /* server local address bound */ |
62 | RXRPC_SERVER_LISTENING, /* server listening for connections */ | |
63 | RXRPC_CLOSE, /* socket is being closed */ | |
64 | }; | |
65 | ||
00e90712 DH |
66 | /* |
67 | * Service backlog preallocation. | |
68 | * | |
69 | * This contains circular buffers of preallocated peers, connections and calls | |
70 | * for incoming service calls and their head and tail pointers. This allows | |
71 | * calls to be set up in the data_ready handler, thereby avoiding the need to | |
72 | * shuffle packets around so much. | |
73 | */ | |
74 | struct rxrpc_backlog { | |
75 | unsigned short peer_backlog_head; | |
76 | unsigned short peer_backlog_tail; | |
77 | unsigned short conn_backlog_head; | |
78 | unsigned short conn_backlog_tail; | |
79 | unsigned short call_backlog_head; | |
80 | unsigned short call_backlog_tail; | |
81 | #define RXRPC_BACKLOG_MAX 32 | |
82 | struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; | |
83 | struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; | |
84 | struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; | |
85 | }; | |
86 | ||
17926a79 DH |
87 | /* |
88 | * RxRPC socket definition | |
89 | */ | |
90 | struct rxrpc_sock { | |
91 | /* WARNING: sk has to be the first member */ | |
92 | struct sock sk; | |
d001648e | 93 | rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
00e90712 | 94 | rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ |
17926a79 | 95 | struct rxrpc_local *local; /* local endpoint */ |
de8d6c74 | 96 | struct hlist_node listen_link; /* link in the local endpoint's listen list */ |
17926a79 DH |
97 | struct list_head secureq; /* calls awaiting connection security clearance */ |
98 | struct list_head acceptq; /* calls awaiting acceptance */ | |
00e90712 | 99 | struct rxrpc_backlog *backlog; /* Preallocation for services */ |
17926a79 DH |
100 | struct key *key; /* security for this socket */ |
101 | struct key *securities; /* list of server security descriptors */ | |
00e90712 | 102 | struct rb_root calls; /* User ID -> call mapping */ |
17926a79 | 103 | unsigned long flags; |
2341e077 | 104 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
17926a79 DH |
105 | rwlock_t call_lock; /* lock for calls */ |
106 | u32 min_sec_level; /* minimum security level */ | |
107 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT | |
cc8feb8e DH |
108 | bool exclusive; /* Exclusive connection for a client socket */ |
109 | sa_family_t family; /* Protocol family created with */ | |
17926a79 | 110 | struct sockaddr_rxrpc srx; /* local address */ |
2341e077 | 111 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
17926a79 DH |
112 | }; |
113 | ||
114 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) | |
115 | ||
0d12f8a4 DH |
116 | /* |
117 | * CPU-byteorder normalised Rx packet header. | |
118 | */ | |
119 | struct rxrpc_host_header { | |
120 | u32 epoch; /* client boot timestamp */ | |
121 | u32 cid; /* connection and channel ID */ | |
122 | u32 callNumber; /* call ID (0 for connection-level packets) */ | |
123 | u32 seq; /* sequence number of pkt in call stream */ | |
124 | u32 serial; /* serial number of pkt sent to network */ | |
125 | u8 type; /* packet type */ | |
126 | u8 flags; /* packet flags */ | |
127 | u8 userStatus; /* app-layer defined status */ | |
128 | u8 securityIndex; /* security protocol ID */ | |
129 | union { | |
130 | u16 _rsvd; /* reserved */ | |
131 | u16 cksum; /* kerberos security checksum */ | |
132 | }; | |
133 | u16 serviceId; /* service ID */ | |
134 | } __packed; | |
135 | ||
17926a79 DH |
136 | /* |
137 | * RxRPC socket buffer private variables | |
138 | * - max 48 bytes (struct sk_buff::cb) | |
139 | */ | |
140 | struct rxrpc_skb_priv { | |
141 | struct rxrpc_call *call; /* call with which associated */ | |
142 | unsigned long resend_at; /* time in jiffies at which to resend */ | |
143 | union { | |
95c96174 | 144 | unsigned int offset; /* offset into buffer of next read */ |
17926a79 DH |
145 | int remain; /* amount of space remaining for next write */ |
146 | u32 error; /* network error code */ | |
147 | bool need_resend; /* T if needs resending */ | |
148 | }; | |
149 | ||
0d12f8a4 | 150 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
17926a79 DH |
151 | }; |
152 | ||
153 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) | |
154 | ||
17926a79 DH |
155 | /* |
156 | * RxRPC security module interface | |
157 | */ | |
158 | struct rxrpc_security { | |
17926a79 DH |
159 | const char *name; /* name of this service */ |
160 | u8 security_index; /* security type provided */ | |
161 | ||
648af7fc DH |
162 | /* Initialise a security service */ |
163 | int (*init)(void); | |
164 | ||
165 | /* Clean up a security service */ | |
166 | void (*exit)(void); | |
167 | ||
17926a79 DH |
168 | /* initialise a connection's security */ |
169 | int (*init_connection_security)(struct rxrpc_connection *); | |
170 | ||
171 | /* prime a connection's packet security */ | |
a263629d | 172 | int (*prime_packet_security)(struct rxrpc_connection *); |
17926a79 DH |
173 | |
174 | /* impose security on a packet */ | |
a263629d | 175 | int (*secure_packet)(struct rxrpc_call *, |
17926a79 DH |
176 | struct sk_buff *, |
177 | size_t, | |
178 | void *); | |
179 | ||
180 | /* verify the security on a received packet */ | |
5a42976d DH |
181 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, |
182 | rxrpc_seq_t, u16); | |
17926a79 DH |
183 | |
184 | /* issue a challenge */ | |
185 | int (*issue_challenge)(struct rxrpc_connection *); | |
186 | ||
187 | /* respond to a challenge */ | |
188 | int (*respond_to_challenge)(struct rxrpc_connection *, | |
189 | struct sk_buff *, | |
190 | u32 *); | |
191 | ||
192 | /* verify a response */ | |
193 | int (*verify_response)(struct rxrpc_connection *, | |
194 | struct sk_buff *, | |
195 | u32 *); | |
196 | ||
197 | /* clear connection security */ | |
198 | void (*clear)(struct rxrpc_connection *); | |
199 | }; | |
200 | ||
201 | /* | |
4f95dd78 DH |
202 | * RxRPC local transport endpoint description |
203 | * - owned by a single AF_RXRPC socket | |
204 | * - pointed to by transport socket struct sk_user_data | |
17926a79 DH |
205 | */ |
206 | struct rxrpc_local { | |
4f95dd78 DH |
207 | struct rcu_head rcu; |
208 | atomic_t usage; | |
209 | struct list_head link; | |
17926a79 | 210 | struct socket *socket; /* my UDP socket */ |
4f95dd78 | 211 | struct work_struct processor; |
de8d6c74 | 212 | struct hlist_head services; /* services listening on this endpoint */ |
17926a79 DH |
213 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
214 | struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ | |
215 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ | |
44ba0698 | 216 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
999b69f8 DH |
217 | struct rb_root client_conns; /* Client connections by socket params */ |
218 | spinlock_t client_conns_lock; /* Lock for client_conns */ | |
17926a79 DH |
219 | spinlock_t lock; /* access lock */ |
220 | rwlock_t services_lock; /* lock for services list */ | |
17926a79 | 221 | int debug_id; /* debug ID for printks */ |
4f95dd78 | 222 | bool dead; |
17926a79 DH |
223 | struct sockaddr_rxrpc srx; /* local address */ |
224 | }; | |
225 | ||
226 | /* | |
227 | * RxRPC remote transport endpoint definition | |
be6e6707 | 228 | * - matched by local endpoint, remote port, address and protocol type |
17926a79 DH |
229 | */ |
230 | struct rxrpc_peer { | |
be6e6707 DH |
231 | struct rcu_head rcu; /* This must be first */ |
232 | atomic_t usage; | |
233 | unsigned long hash_key; | |
234 | struct hlist_node hash_link; | |
235 | struct rxrpc_local *local; | |
f66d7490 DH |
236 | struct hlist_head error_targets; /* targets for net error distribution */ |
237 | struct work_struct error_distributor; | |
aa390bbe | 238 | struct rb_root service_conns; /* Service connections */ |
8496af50 | 239 | seqlock_t service_conn_lock; |
17926a79 | 240 | spinlock_t lock; /* access lock */ |
95c96174 ED |
241 | unsigned int if_mtu; /* interface MTU for this peer */ |
242 | unsigned int mtu; /* network MTU for this peer */ | |
243 | unsigned int maxdata; /* data size (MTU - hdrsize) */ | |
17926a79 DH |
244 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
245 | int debug_id; /* debug ID for printks */ | |
f66d7490 DH |
246 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
247 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 | |
17926a79 DH |
248 | struct sockaddr_rxrpc srx; /* remote address */ |
249 | ||
250 | /* calculated RTT cache */ | |
251 | #define RXRPC_RTT_CACHE_SIZE 32 | |
252 | suseconds_t rtt; /* current RTT estimate (in uS) */ | |
95c96174 ED |
253 | unsigned int rtt_point; /* next entry at which to insert */ |
254 | unsigned int rtt_usage; /* amount of cache actually used */ | |
17926a79 DH |
255 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
256 | }; | |
257 | ||
19ffa01c DH |
258 | /* |
259 | * Keys for matching a connection. | |
260 | */ | |
261 | struct rxrpc_conn_proto { | |
e8d70ce1 DH |
262 | union { |
263 | struct { | |
264 | u32 epoch; /* epoch of this connection */ | |
265 | u32 cid; /* connection ID */ | |
266 | }; | |
267 | u64 index_key; | |
19ffa01c DH |
268 | }; |
269 | }; | |
270 | ||
271 | struct rxrpc_conn_parameters { | |
272 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
273 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
274 | struct key *key; /* Security details */ | |
275 | bool exclusive; /* T if conn is exclusive */ | |
276 | u16 service_id; /* Service ID for this connection */ | |
277 | u32 security_level; /* Security level selected */ | |
278 | }; | |
279 | ||
bba304db DH |
280 | /* |
281 | * Bits in the connection flags. | |
282 | */ | |
283 | enum rxrpc_conn_flag { | |
284 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ | |
001c1122 DH |
285 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
286 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ | |
45025bce DH |
287 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
288 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ | |
289 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ | |
bba304db DH |
290 | }; |
291 | ||
292 | /* | |
293 | * Events that can be raised upon a connection. | |
294 | */ | |
295 | enum rxrpc_conn_event { | |
296 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ | |
297 | }; | |
298 | ||
45025bce DH |
299 | /* |
300 | * The connection cache state. | |
301 | */ | |
302 | enum rxrpc_conn_cache_state { | |
303 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ | |
304 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ | |
305 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ | |
306 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ | |
307 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ | |
308 | }; | |
309 | ||
bba304db DH |
310 | /* |
311 | * The connection protocol state. | |
312 | */ | |
313 | enum rxrpc_conn_proto_state { | |
314 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ | |
315 | RXRPC_CONN_CLIENT, /* Client connection */ | |
00e90712 | 316 | RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ |
bba304db DH |
317 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
318 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ | |
319 | RXRPC_CONN_SERVICE, /* Service secured connection */ | |
320 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ | |
321 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ | |
bba304db DH |
322 | RXRPC_CONN__NR_STATES |
323 | }; | |
324 | ||
17926a79 DH |
325 | /* |
326 | * RxRPC connection definition | |
aa390bbe | 327 | * - matched by { local, peer, epoch, conn_id, direction } |
17926a79 DH |
328 | * - each connection can only handle four simultaneous calls |
329 | */ | |
330 | struct rxrpc_connection { | |
19ffa01c DH |
331 | struct rxrpc_conn_proto proto; |
332 | struct rxrpc_conn_parameters params; | |
333 | ||
45025bce DH |
334 | atomic_t usage; |
335 | struct rcu_head rcu; | |
336 | struct list_head cache_link; | |
a1399f8b | 337 | |
45025bce DH |
338 | spinlock_t channel_lock; |
339 | unsigned char active_chans; /* Mask of active channels */ | |
340 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) | |
341 | struct list_head waiting_calls; /* Calls waiting for channels */ | |
a1399f8b DH |
342 | struct rxrpc_channel { |
343 | struct rxrpc_call __rcu *call; /* Active call */ | |
344 | u32 call_id; /* ID of current call */ | |
345 | u32 call_counter; /* Call ID counter */ | |
346 | u32 last_call; /* ID of last call */ | |
18bfeba5 DH |
347 | u8 last_type; /* Type of last packet */ |
348 | u16 last_service_id; | |
349 | union { | |
350 | u32 last_seq; | |
351 | u32 last_abort; | |
352 | }; | |
a1399f8b | 353 | } channels[RXRPC_MAXCALLS]; |
999b69f8 | 354 | |
17926a79 | 355 | struct work_struct processor; /* connection event processor */ |
999b69f8 DH |
356 | union { |
357 | struct rb_node client_node; /* Node in local->client_conns */ | |
aa390bbe | 358 | struct rb_node service_node; /* Node in peer->service_conns */ |
999b69f8 | 359 | }; |
4d028b2c | 360 | struct list_head proc_link; /* link in procfs list */ |
17926a79 | 361 | struct list_head link; /* link in master connection list */ |
17926a79 | 362 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
648af7fc | 363 | const struct rxrpc_security *security; /* applied security module */ |
17926a79 | 364 | struct key *server_key; /* security for this service */ |
1afe593b | 365 | struct crypto_skcipher *cipher; /* encryption handle */ |
17926a79 | 366 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
4a3388c8 | 367 | unsigned long flags; |
17926a79 | 368 | unsigned long events; |
f51b4480 | 369 | unsigned long idle_timestamp; /* Time at which last became idle */ |
17926a79 | 370 | spinlock_t state_lock; /* state-change lock */ |
cf13258f DH |
371 | enum rxrpc_conn_cache_state cache_state; |
372 | enum rxrpc_conn_proto_state state; /* current state of connection */ | |
dc44b3a0 DH |
373 | u32 local_abort; /* local abort code */ |
374 | u32 remote_abort; /* remote abort code */ | |
17926a79 | 375 | int debug_id; /* debug ID for printks */ |
17926a79 | 376 | atomic_t serial; /* packet serial number counter */ |
563ea7d5 | 377 | unsigned int hi_serial; /* highest serial number received */ |
17926a79 DH |
378 | u8 size_align; /* data size alignment (for security) */ |
379 | u8 header_size; /* rxrpc + security header size */ | |
380 | u8 security_size; /* security header size */ | |
17926a79 | 381 | u32 security_nonce; /* response re-use preventer */ |
17926a79 | 382 | u8 security_ix; /* security type */ |
17926a79 DH |
383 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
384 | }; | |
385 | ||
5b8848d1 DH |
386 | /* |
387 | * Flags in call->flags. | |
388 | */ | |
389 | enum rxrpc_call_flag { | |
390 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ | |
391 | RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ | |
392 | RXRPC_CALL_RCVD_LAST, /* all packets received */ | |
393 | RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ | |
394 | RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ | |
5b8848d1 DH |
395 | RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ |
396 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ | |
397 | RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ | |
dabe5a79 | 398 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
45025bce | 399 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
d001648e | 400 | RXRPC_CALL_RX_NO_MORE, /* Don't indicate MSG_MORE from recvmsg() */ |
5b8848d1 DH |
401 | }; |
402 | ||
403 | /* | |
404 | * Events that can be raised on a call. | |
405 | */ | |
406 | enum rxrpc_call_event { | |
4c198ad1 DH |
407 | RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ |
408 | RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ | |
409 | RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ | |
410 | RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ | |
411 | RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ | |
412 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ | |
413 | RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ | |
414 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ | |
415 | RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ | |
416 | RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ | |
417 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ | |
418 | RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ | |
419 | RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ | |
420 | RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ | |
421 | RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ | |
422 | RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ | |
5b8848d1 DH |
423 | }; |
424 | ||
425 | /* | |
426 | * The states that a call can be in. | |
427 | */ | |
428 | enum rxrpc_call_state { | |
999b69f8 DH |
429 | RXRPC_CALL_UNINITIALISED, |
430 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ | |
5b8848d1 DH |
431 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
432 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ | |
433 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ | |
434 | RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ | |
00e90712 | 435 | RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ |
5b8848d1 DH |
436 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
437 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ | |
438 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ | |
439 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ | |
440 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ | |
441 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ | |
f5c17aae | 442 | RXRPC_CALL_COMPLETE, /* - call complete */ |
f5c17aae DH |
443 | NR__RXRPC_CALL_STATES |
444 | }; | |
445 | ||
446 | /* | |
447 | * Call completion condition (state == RXRPC_CALL_COMPLETE). | |
448 | */ | |
449 | enum rxrpc_call_completion { | |
450 | RXRPC_CALL_SUCCEEDED, /* - Normal termination */ | |
5b8848d1 DH |
451 | RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ |
452 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ | |
453 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ | |
f5c17aae | 454 | RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ |
5b8848d1 | 455 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
f5c17aae | 456 | NR__RXRPC_CALL_COMPLETIONS |
5b8848d1 DH |
457 | }; |
458 | ||
17926a79 DH |
459 | /* |
460 | * RxRPC call definition | |
461 | * - matched by { connection, call_id } | |
462 | */ | |
463 | struct rxrpc_call { | |
dee46364 | 464 | struct rcu_head rcu; |
17926a79 | 465 | struct rxrpc_connection *conn; /* connection carrying call */ |
df5d8bf7 | 466 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
8d94aa38 | 467 | struct rxrpc_sock __rcu *socket; /* socket responsible */ |
17926a79 | 468 | struct timer_list lifetimer; /* lifetime remaining on call */ |
17926a79 DH |
469 | struct timer_list ack_timer; /* ACK generation timer */ |
470 | struct timer_list resend_timer; /* Tx resend timer */ | |
17926a79 | 471 | struct work_struct processor; /* packet processor and ACK generator */ |
d001648e | 472 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
17926a79 | 473 | struct list_head link; /* link in master call list */ |
45025bce | 474 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
f66d7490 | 475 | struct hlist_node error_link; /* link in error distribution list */ |
17926a79 DH |
476 | struct list_head accept_link; /* calls awaiting acceptance */ |
477 | struct rb_node sock_node; /* node in socket call tree */ | |
17926a79 DH |
478 | struct sk_buff_head rx_queue; /* received packets */ |
479 | struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ | |
d001648e | 480 | struct sk_buff_head knlrecv_queue; /* Queue for kernel_recv [TODO: replace this] */ |
17926a79 | 481 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
45025bce | 482 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
a263629d | 483 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
17926a79 DH |
484 | unsigned long user_call_ID; /* user-defined call ID */ |
485 | unsigned long creation_jif; /* time of call creation */ | |
486 | unsigned long flags; | |
17926a79 | 487 | unsigned long events; |
17926a79 DH |
488 | spinlock_t lock; |
489 | rwlock_t state_lock; /* lock for state transition */ | |
f5c17aae DH |
490 | u32 abort_code; /* Local/remote abort code */ |
491 | int error; /* Local error incurred */ | |
cf13258f DH |
492 | enum rxrpc_call_state state; /* current state of call */ |
493 | enum rxrpc_call_completion completion; /* Call completion condition */ | |
17926a79 DH |
494 | atomic_t usage; |
495 | atomic_t sequence; /* Tx data packet sequence counter */ | |
dabe5a79 | 496 | u16 service_id; /* service ID */ |
278ac0cd | 497 | u8 security_ix; /* Security type */ |
dabe5a79 DH |
498 | u32 call_id; /* call ID on connection */ |
499 | u32 cid; /* connection ID plus channel index */ | |
500 | int debug_id; /* debug ID for printks */ | |
17926a79 DH |
501 | |
502 | /* transmission-phase ACK management */ | |
4e36a95e DH |
503 | u8 acks_head; /* offset into window of first entry */ |
504 | u8 acks_tail; /* offset into window of last entry */ | |
505 | u8 acks_winsz; /* size of un-ACK'd window */ | |
506 | u8 acks_unacked; /* lowest unacked packet in last ACK received */ | |
17926a79 DH |
507 | int acks_latest; /* serial number of latest ACK received */ |
508 | rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ | |
509 | unsigned long *acks_window; /* sent packet window | |
510 | * - elements are pointers with LSB set if ACK'd | |
511 | */ | |
512 | ||
513 | /* receive-phase ACK management */ | |
514 | rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ | |
515 | rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ | |
516 | rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ | |
517 | rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ | |
518 | rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ | |
519 | rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ | |
0d12f8a4 | 520 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
4e36a95e | 521 | u8 ackr_reason; /* reason to ACK */ |
563ea7d5 | 522 | u16 ackr_skew; /* skew on packet being ACK'd */ |
0d12f8a4 | 523 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
17926a79 DH |
524 | atomic_t ackr_not_idle; /* number of packets in Rx queue */ |
525 | ||
526 | /* received packet records, 1 bit per record */ | |
527 | #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) | |
528 | unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; | |
17926a79 DH |
529 | }; |
530 | ||
fff72429 DH |
531 | enum rxrpc_call_trace { |
532 | rxrpc_call_new_client, | |
533 | rxrpc_call_new_service, | |
534 | rxrpc_call_queued, | |
535 | rxrpc_call_queued_ref, | |
536 | rxrpc_call_seen, | |
537 | rxrpc_call_got, | |
538 | rxrpc_call_got_skb, | |
539 | rxrpc_call_got_userid, | |
540 | rxrpc_call_put, | |
541 | rxrpc_call_put_skb, | |
542 | rxrpc_call_put_userid, | |
543 | rxrpc_call_put_noqueue, | |
544 | rxrpc_call__nr_trace | |
545 | }; | |
546 | ||
547 | extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4]; | |
548 | ||
df844fd4 DH |
549 | #include <trace/events/rxrpc.h> |
550 | ||
17926a79 | 551 | /* |
651350d1 | 552 | * af_rxrpc.c |
17926a79 | 553 | */ |
651350d1 | 554 | extern atomic_t rxrpc_n_skbs; |
0d12f8a4 | 555 | extern u32 rxrpc_epoch; |
651350d1 DH |
556 | extern atomic_t rxrpc_debug_id; |
557 | extern struct workqueue_struct *rxrpc_workqueue; | |
17926a79 DH |
558 | |
559 | /* | |
0d81a51a | 560 | * call_accept.c |
17926a79 | 561 | */ |
00e90712 DH |
562 | int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); |
563 | void rxrpc_discard_prealloc(struct rxrpc_sock *); | |
4f95dd78 | 564 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
d001648e DH |
565 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
566 | rxrpc_notify_rx_t); | |
c1b1203d | 567 | int rxrpc_reject_call(struct rxrpc_sock *); |
17926a79 DH |
568 | |
569 | /* | |
0d81a51a | 570 | * call_event.c |
17926a79 | 571 | */ |
563ea7d5 DH |
572 | void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); |
573 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); | |
c1b1203d | 574 | void rxrpc_process_call(struct work_struct *); |
17926a79 DH |
575 | |
576 | /* | |
0d81a51a | 577 | * call_object.c |
17926a79 | 578 | */ |
f5c17aae DH |
579 | extern const char *const rxrpc_call_states[]; |
580 | extern const char *const rxrpc_call_completions[]; | |
dad8aff7 | 581 | extern unsigned int rxrpc_max_call_lifetime; |
17926a79 DH |
582 | extern struct kmem_cache *rxrpc_call_jar; |
583 | extern struct list_head rxrpc_calls; | |
584 | extern rwlock_t rxrpc_call_lock; | |
585 | ||
2341e077 | 586 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
00e90712 | 587 | struct rxrpc_call *rxrpc_alloc_call(gfp_t); |
2341e077 | 588 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
19ffa01c | 589 | struct rxrpc_conn_parameters *, |
999b69f8 | 590 | struct sockaddr_rxrpc *, |
2341e077 | 591 | unsigned long, gfp_t); |
c1b1203d JP |
592 | struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, |
593 | struct rxrpc_connection *, | |
42886ffe | 594 | struct sk_buff *); |
8d94aa38 | 595 | void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); |
c1b1203d | 596 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
8d94aa38 DH |
597 | bool __rxrpc_queue_call(struct rxrpc_call *); |
598 | bool rxrpc_queue_call(struct rxrpc_call *); | |
e34d4234 | 599 | void rxrpc_see_call(struct rxrpc_call *); |
fff72429 DH |
600 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
601 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); | |
e34d4234 DH |
602 | void rxrpc_get_call_for_skb(struct rxrpc_call *, struct sk_buff *); |
603 | void rxrpc_put_call_for_skb(struct rxrpc_call *, struct sk_buff *); | |
00e90712 | 604 | void rxrpc_cleanup_call(struct rxrpc_call *); |
c1b1203d | 605 | void __exit rxrpc_destroy_all_calls(void); |
17926a79 | 606 | |
dabe5a79 DH |
607 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
608 | { | |
609 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); | |
610 | } | |
611 | ||
612 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) | |
613 | { | |
614 | return !rxrpc_is_service_call(call); | |
615 | } | |
616 | ||
f5c17aae DH |
617 | /* |
618 | * Transition a call to the complete state. | |
619 | */ | |
620 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, | |
621 | enum rxrpc_call_completion compl, | |
622 | u32 abort_code, | |
623 | int error) | |
624 | { | |
625 | if (call->state < RXRPC_CALL_COMPLETE) { | |
626 | call->abort_code = abort_code; | |
627 | call->error = error; | |
628 | call->completion = compl, | |
629 | call->state = RXRPC_CALL_COMPLETE; | |
630 | return true; | |
631 | } | |
632 | return false; | |
633 | } | |
634 | ||
635 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, | |
636 | enum rxrpc_call_completion compl, | |
637 | u32 abort_code, | |
638 | int error) | |
639 | { | |
e8d6bbb0 | 640 | bool ret; |
f5c17aae DH |
641 | |
642 | write_lock_bh(&call->state_lock); | |
643 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); | |
644 | write_unlock_bh(&call->state_lock); | |
645 | return ret; | |
646 | } | |
647 | ||
648 | /* | |
649 | * Record that a call successfully completed. | |
650 | */ | |
e8d6bbb0 | 651 | static inline bool __rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 652 | { |
e8d6bbb0 | 653 | return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
f5c17aae DH |
654 | } |
655 | ||
e8d6bbb0 | 656 | static inline bool rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 657 | { |
e8d6bbb0 DH |
658 | bool ret; |
659 | ||
f5c17aae | 660 | write_lock_bh(&call->state_lock); |
e8d6bbb0 | 661 | ret = __rxrpc_call_completed(call); |
f5c17aae | 662 | write_unlock_bh(&call->state_lock); |
e8d6bbb0 | 663 | return ret; |
f5c17aae DH |
664 | } |
665 | ||
666 | /* | |
667 | * Record that a call is locally aborted. | |
668 | */ | |
5a42976d DH |
669 | static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
670 | rxrpc_seq_t seq, | |
f5c17aae DH |
671 | u32 abort_code, int error) |
672 | { | |
5a42976d DH |
673 | trace_rxrpc_abort(why, call->cid, call->call_id, seq, |
674 | abort_code, error); | |
f5c17aae DH |
675 | if (__rxrpc_set_call_completion(call, |
676 | RXRPC_CALL_LOCALLY_ABORTED, | |
677 | abort_code, error)) { | |
678 | set_bit(RXRPC_CALL_EV_ABORT, &call->events); | |
679 | return true; | |
680 | } | |
681 | return false; | |
682 | } | |
683 | ||
5a42976d DH |
684 | static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
685 | rxrpc_seq_t seq, u32 abort_code, int error) | |
f5c17aae DH |
686 | { |
687 | bool ret; | |
688 | ||
689 | write_lock_bh(&call->state_lock); | |
5a42976d | 690 | ret = __rxrpc_abort_call(why, call, seq, abort_code, error); |
f5c17aae DH |
691 | write_unlock_bh(&call->state_lock); |
692 | return ret; | |
693 | } | |
694 | ||
4a3388c8 DH |
695 | /* |
696 | * conn_client.c | |
697 | */ | |
45025bce DH |
698 | extern unsigned int rxrpc_max_client_connections; |
699 | extern unsigned int rxrpc_reap_client_connections; | |
700 | extern unsigned int rxrpc_conn_idle_client_expiry; | |
701 | extern unsigned int rxrpc_conn_idle_client_fast_expiry; | |
4a3388c8 DH |
702 | extern struct idr rxrpc_client_conn_ids; |
703 | ||
eb9b9d22 | 704 | void rxrpc_destroy_client_conn_ids(void); |
c6d2b8d7 DH |
705 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
706 | struct sockaddr_rxrpc *, gfp_t); | |
45025bce DH |
707 | void rxrpc_expose_client_call(struct rxrpc_call *); |
708 | void rxrpc_disconnect_client_call(struct rxrpc_call *); | |
709 | void rxrpc_put_client_conn(struct rxrpc_connection *); | |
710 | void __exit rxrpc_destroy_all_client_connections(void); | |
4a3388c8 | 711 | |
17926a79 | 712 | /* |
0d81a51a DH |
713 | * conn_event.c |
714 | */ | |
715 | void rxrpc_process_connection(struct work_struct *); | |
716 | void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); | |
4f95dd78 | 717 | void rxrpc_reject_packets(struct rxrpc_local *); |
0d81a51a DH |
718 | |
719 | /* | |
720 | * conn_object.c | |
17926a79 | 721 | */ |
dad8aff7 | 722 | extern unsigned int rxrpc_connection_expiry; |
17926a79 | 723 | extern struct list_head rxrpc_connections; |
4d028b2c | 724 | extern struct list_head rxrpc_connection_proc_list; |
17926a79 DH |
725 | extern rwlock_t rxrpc_connection_lock; |
726 | ||
8496af50 | 727 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
c6d2b8d7 | 728 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
8496af50 DH |
729 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
730 | struct sk_buff *); | |
45025bce | 731 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
999b69f8 | 732 | void rxrpc_disconnect_call(struct rxrpc_call *); |
45025bce | 733 | void rxrpc_kill_connection(struct rxrpc_connection *); |
f51b4480 | 734 | void __rxrpc_put_connection(struct rxrpc_connection *); |
c1b1203d | 735 | void __exit rxrpc_destroy_all_connections(void); |
17926a79 | 736 | |
19ffa01c DH |
737 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
738 | { | |
739 | return conn->out_clientflag; | |
740 | } | |
741 | ||
742 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) | |
743 | { | |
e8d70ce1 | 744 | return !rxrpc_conn_is_client(conn); |
19ffa01c DH |
745 | } |
746 | ||
5627cc8b DH |
747 | static inline void rxrpc_get_connection(struct rxrpc_connection *conn) |
748 | { | |
749 | atomic_inc(&conn->usage); | |
750 | } | |
751 | ||
2c4579e4 DH |
752 | static inline |
753 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) | |
754 | { | |
755 | return atomic_inc_not_zero(&conn->usage) ? conn : NULL; | |
756 | } | |
5acbee46 | 757 | |
f51b4480 DH |
758 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
759 | { | |
45025bce DH |
760 | if (!conn) |
761 | return; | |
762 | ||
763 | if (rxrpc_conn_is_client(conn)) { | |
764 | if (atomic_dec_and_test(&conn->usage)) | |
765 | rxrpc_put_client_conn(conn); | |
766 | } else { | |
767 | if (atomic_dec_return(&conn->usage) == 1) | |
768 | __rxrpc_put_connection(conn); | |
769 | } | |
f51b4480 DH |
770 | } |
771 | ||
8496af50 | 772 | static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
5acbee46 | 773 | { |
8496af50 DH |
774 | if (!rxrpc_get_connection_maybe(conn)) |
775 | return false; | |
776 | if (!rxrpc_queue_work(&conn->processor)) | |
2c4579e4 | 777 | rxrpc_put_connection(conn); |
8496af50 | 778 | return true; |
5acbee46 DH |
779 | } |
780 | ||
7877a4a4 DH |
781 | /* |
782 | * conn_service.c | |
783 | */ | |
8496af50 DH |
784 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
785 | struct sk_buff *); | |
7877a4a4 | 786 | struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, |
d991b4a3 | 787 | struct sockaddr_rxrpc *, |
7877a4a4 | 788 | struct sk_buff *); |
00e90712 | 789 | struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t); |
001c1122 | 790 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
7877a4a4 | 791 | |
17926a79 | 792 | /* |
0d81a51a | 793 | * input.c |
17926a79 | 794 | */ |
0d81a51a DH |
795 | void rxrpc_data_ready(struct sock *); |
796 | int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); | |
797 | void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); | |
17926a79 DH |
798 | |
799 | /* | |
0d81a51a | 800 | * insecure.c |
17926a79 | 801 | */ |
0d81a51a | 802 | extern const struct rxrpc_security rxrpc_no_security; |
17926a79 DH |
803 | |
804 | /* | |
0d81a51a | 805 | * key.c |
17926a79 | 806 | */ |
0d81a51a DH |
807 | extern struct key_type key_type_rxrpc; |
808 | extern struct key_type key_type_rxrpc_s; | |
809 | ||
810 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); | |
811 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
812 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, | |
813 | u32); | |
17926a79 | 814 | |
87563616 DH |
815 | /* |
816 | * local_event.c | |
817 | */ | |
4f95dd78 | 818 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
87563616 | 819 | |
17926a79 | 820 | /* |
0d81a51a | 821 | * local_object.c |
17926a79 | 822 | */ |
4f95dd78 DH |
823 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
824 | void __rxrpc_put_local(struct rxrpc_local *); | |
c1b1203d | 825 | void __exit rxrpc_destroy_all_locals(void); |
17926a79 | 826 | |
4f95dd78 DH |
827 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
828 | { | |
829 | atomic_inc(&local->usage); | |
830 | } | |
831 | ||
832 | static inline | |
833 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) | |
834 | { | |
835 | return atomic_inc_not_zero(&local->usage) ? local : NULL; | |
836 | } | |
837 | ||
838 | static inline void rxrpc_put_local(struct rxrpc_local *local) | |
839 | { | |
5627cc8b | 840 | if (local && atomic_dec_and_test(&local->usage)) |
4f95dd78 DH |
841 | __rxrpc_put_local(local); |
842 | } | |
843 | ||
5acbee46 DH |
844 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
845 | { | |
846 | rxrpc_queue_work(&local->processor); | |
847 | } | |
848 | ||
17926a79 | 849 | /* |
0d81a51a | 850 | * misc.c |
17926a79 | 851 | */ |
0d81a51a DH |
852 | extern unsigned int rxrpc_max_backlog __read_mostly; |
853 | extern unsigned int rxrpc_requested_ack_delay; | |
854 | extern unsigned int rxrpc_soft_ack_delay; | |
855 | extern unsigned int rxrpc_idle_ack_delay; | |
856 | extern unsigned int rxrpc_rx_window_size; | |
857 | extern unsigned int rxrpc_rx_mtu; | |
858 | extern unsigned int rxrpc_rx_jumbo_max; | |
0b58b8a1 | 859 | extern unsigned int rxrpc_resend_timeout; |
17926a79 | 860 | |
0d81a51a DH |
861 | extern const char *const rxrpc_pkts[]; |
862 | extern const s8 rxrpc_ack_priority[]; | |
863 | ||
864 | extern const char *rxrpc_acks(u8 reason); | |
17926a79 DH |
865 | |
866 | /* | |
0d81a51a | 867 | * output.c |
17926a79 | 868 | */ |
8d94aa38 | 869 | int rxrpc_send_call_packet(struct rxrpc_call *, u8); |
985a5c82 | 870 | int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); |
17926a79 DH |
871 | |
872 | /* | |
abe89ef0 | 873 | * peer_event.c |
0d81a51a | 874 | */ |
abe89ef0 | 875 | void rxrpc_error_report(struct sock *); |
f66d7490 | 876 | void rxrpc_peer_error_distributor(struct work_struct *); |
0d81a51a DH |
877 | |
878 | /* | |
879 | * peer_object.c | |
17926a79 | 880 | */ |
be6e6707 DH |
881 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
882 | const struct sockaddr_rxrpc *); | |
883 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, | |
884 | struct sockaddr_rxrpc *, gfp_t); | |
885 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); | |
886 | ||
df5d8bf7 | 887 | static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
be6e6707 DH |
888 | { |
889 | atomic_inc(&peer->usage); | |
df5d8bf7 | 890 | return peer; |
be6e6707 DH |
891 | } |
892 | ||
893 | static inline | |
894 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) | |
895 | { | |
896 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; | |
897 | } | |
898 | ||
899 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); | |
900 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) | |
901 | { | |
5627cc8b | 902 | if (peer && atomic_dec_and_test(&peer->usage)) |
be6e6707 DH |
903 | __rxrpc_put_peer(peer); |
904 | } | |
17926a79 DH |
905 | |
906 | /* | |
0d81a51a | 907 | * proc.c |
17926a79 | 908 | */ |
036c2e27 JE |
909 | extern const struct file_operations rxrpc_call_seq_fops; |
910 | extern const struct file_operations rxrpc_connection_seq_fops; | |
17926a79 DH |
911 | |
912 | /* | |
0d81a51a | 913 | * recvmsg.c |
17926a79 | 914 | */ |
1b784140 | 915 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
17926a79 DH |
916 | |
917 | /* | |
0d81a51a DH |
918 | * rxkad.c |
919 | */ | |
920 | #ifdef CONFIG_RXKAD | |
921 | extern const struct rxrpc_security rxkad; | |
922 | #endif | |
923 | ||
924 | /* | |
925 | * security.c | |
17926a79 | 926 | */ |
648af7fc DH |
927 | int __init rxrpc_init_security(void); |
928 | void rxrpc_exit_security(void); | |
c1b1203d JP |
929 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
930 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); | |
71a17de3 | 931 | |
0b58b8a1 DH |
932 | /* |
933 | * sendmsg.c | |
934 | */ | |
935 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); | |
17926a79 DH |
936 | |
937 | /* | |
0d81a51a | 938 | * skbuff.c |
17926a79 | 939 | */ |
d001648e | 940 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
c1b1203d | 941 | void rxrpc_packet_destructor(struct sk_buff *); |
df844fd4 DH |
942 | void rxrpc_new_skb(struct sk_buff *); |
943 | void rxrpc_see_skb(struct sk_buff *); | |
944 | void rxrpc_get_skb(struct sk_buff *); | |
945 | void rxrpc_free_skb(struct sk_buff *); | |
946 | void rxrpc_purge_queue(struct sk_buff_head *); | |
17926a79 | 947 | |
5873c083 DH |
948 | /* |
949 | * sysctl.c | |
950 | */ | |
951 | #ifdef CONFIG_SYSCTL | |
952 | extern int __init rxrpc_sysctl_init(void); | |
953 | extern void rxrpc_sysctl_exit(void); | |
954 | #else | |
955 | static inline int __init rxrpc_sysctl_init(void) { return 0; } | |
956 | static inline void rxrpc_sysctl_exit(void) {} | |
957 | #endif | |
958 | ||
be6e6707 DH |
959 | /* |
960 | * utils.c | |
961 | */ | |
d991b4a3 | 962 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
be6e6707 | 963 | |
17926a79 DH |
964 | /* |
965 | * debug tracing | |
966 | */ | |
95c96174 | 967 | extern unsigned int rxrpc_debug; |
17926a79 DH |
968 | |
969 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 970 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 971 | |
0dc47877 HH |
972 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
973 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 DH |
974 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
975 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
976 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
977 | ||
978 | ||
979 | #if defined(__KDEBUG) | |
980 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
981 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
982 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
983 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
984 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
985 | ||
986 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
987 | #define RXRPC_DEBUG_KENTER 0x01 | |
988 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
989 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
990 | #define RXRPC_DEBUG_KPROTO 0x08 | |
991 | #define RXRPC_DEBUG_KNET 0x10 | |
992 | ||
993 | #define _enter(FMT,...) \ | |
994 | do { \ | |
995 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
996 | kenter(FMT,##__VA_ARGS__); \ | |
997 | } while (0) | |
998 | ||
999 | #define _leave(FMT,...) \ | |
1000 | do { \ | |
1001 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
1002 | kleave(FMT,##__VA_ARGS__); \ | |
1003 | } while (0) | |
1004 | ||
1005 | #define _debug(FMT,...) \ | |
1006 | do { \ | |
1007 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
1008 | kdebug(FMT,##__VA_ARGS__); \ | |
1009 | } while (0) | |
1010 | ||
1011 | #define _proto(FMT,...) \ | |
1012 | do { \ | |
1013 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
1014 | kproto(FMT,##__VA_ARGS__); \ | |
1015 | } while (0) | |
1016 | ||
1017 | #define _net(FMT,...) \ | |
1018 | do { \ | |
1019 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
1020 | knet(FMT,##__VA_ARGS__); \ | |
1021 | } while (0) | |
1022 | ||
1023 | #else | |
12fdff3f DH |
1024 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1025 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1026 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
1027 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) | |
1028 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) | |
17926a79 DH |
1029 | #endif |
1030 | ||
1031 | /* | |
1032 | * debug assertion checking | |
1033 | */ | |
1034 | #if 1 // defined(__KDEBUGALL) | |
1035 | ||
1036 | #define ASSERT(X) \ | |
1037 | do { \ | |
1038 | if (unlikely(!(X))) { \ | |
9b6d5398 | 1039 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1040 | BUG(); \ |
1041 | } \ | |
b4f1342f | 1042 | } while (0) |
17926a79 DH |
1043 | |
1044 | #define ASSERTCMP(X, OP, Y) \ | |
1045 | do { \ | |
cf13258f DH |
1046 | __typeof__(X) _x = (X); \ |
1047 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 | 1048 | if (unlikely(!(_x OP _y))) { \ |
cf13258f DH |
1049 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
1050 | (unsigned long)_x, (unsigned long)_x, #OP, \ | |
1051 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1052 | BUG(); \ |
1053 | } \ | |
b4f1342f | 1054 | } while (0) |
17926a79 DH |
1055 | |
1056 | #define ASSERTIF(C, X) \ | |
1057 | do { \ | |
1058 | if (unlikely((C) && !(X))) { \ | |
9b6d5398 | 1059 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1060 | BUG(); \ |
1061 | } \ | |
b4f1342f | 1062 | } while (0) |
17926a79 DH |
1063 | |
1064 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1065 | do { \ | |
cf13258f DH |
1066 | __typeof__(X) _x = (X); \ |
1067 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 JP |
1068 | if (unlikely((C) && !(_x OP _y))) { \ |
1069 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
cf13258f DH |
1070 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
1071 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1072 | BUG(); \ |
1073 | } \ | |
b4f1342f | 1074 | } while (0) |
17926a79 DH |
1075 | |
1076 | #else | |
1077 | ||
1078 | #define ASSERT(X) \ | |
1079 | do { \ | |
b4f1342f | 1080 | } while (0) |
17926a79 DH |
1081 | |
1082 | #define ASSERTCMP(X, OP, Y) \ | |
1083 | do { \ | |
b4f1342f | 1084 | } while (0) |
17926a79 DH |
1085 | |
1086 | #define ASSERTIF(C, X) \ | |
1087 | do { \ | |
b4f1342f | 1088 | } while (0) |
17926a79 DH |
1089 | |
1090 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1091 | do { \ | |
b4f1342f | 1092 | } while (0) |
17926a79 DH |
1093 | |
1094 | #endif /* __KDEBUGALL */ |