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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 */ |
00e90712 | 97 | struct rxrpc_backlog *backlog; /* Preallocation for services */ |
248f219c DH |
98 | spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ |
99 | struct list_head sock_calls; /* List of calls owned by this socket */ | |
100 | struct list_head to_be_accepted; /* calls awaiting acceptance */ | |
101 | struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ | |
102 | rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ | |
17926a79 DH |
103 | struct key *key; /* security for this socket */ |
104 | struct key *securities; /* list of server security descriptors */ | |
00e90712 | 105 | struct rb_root calls; /* User ID -> call mapping */ |
17926a79 | 106 | unsigned long flags; |
2341e077 | 107 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
17926a79 DH |
108 | rwlock_t call_lock; /* lock for calls */ |
109 | u32 min_sec_level; /* minimum security level */ | |
110 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT | |
cc8feb8e DH |
111 | bool exclusive; /* Exclusive connection for a client socket */ |
112 | sa_family_t family; /* Protocol family created with */ | |
17926a79 | 113 | struct sockaddr_rxrpc srx; /* local address */ |
2341e077 | 114 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
17926a79 DH |
115 | }; |
116 | ||
117 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) | |
118 | ||
0d12f8a4 DH |
119 | /* |
120 | * CPU-byteorder normalised Rx packet header. | |
121 | */ | |
122 | struct rxrpc_host_header { | |
123 | u32 epoch; /* client boot timestamp */ | |
124 | u32 cid; /* connection and channel ID */ | |
125 | u32 callNumber; /* call ID (0 for connection-level packets) */ | |
126 | u32 seq; /* sequence number of pkt in call stream */ | |
127 | u32 serial; /* serial number of pkt sent to network */ | |
128 | u8 type; /* packet type */ | |
129 | u8 flags; /* packet flags */ | |
130 | u8 userStatus; /* app-layer defined status */ | |
131 | u8 securityIndex; /* security protocol ID */ | |
132 | union { | |
133 | u16 _rsvd; /* reserved */ | |
134 | u16 cksum; /* kerberos security checksum */ | |
135 | }; | |
136 | u16 serviceId; /* service ID */ | |
137 | } __packed; | |
138 | ||
17926a79 DH |
139 | /* |
140 | * RxRPC socket buffer private variables | |
141 | * - max 48 bytes (struct sk_buff::cb) | |
142 | */ | |
143 | struct rxrpc_skb_priv { | |
248f219c DH |
144 | union { |
145 | unsigned long resend_at; /* time in jiffies at which to resend */ | |
146 | struct { | |
147 | u8 nr_jumbo; /* Number of jumbo subpackets */ | |
148 | }; | |
149 | }; | |
17926a79 | 150 | union { |
95c96174 | 151 | unsigned int offset; /* offset into buffer of next read */ |
17926a79 DH |
152 | int remain; /* amount of space remaining for next write */ |
153 | u32 error; /* network error code */ | |
17926a79 DH |
154 | }; |
155 | ||
0d12f8a4 | 156 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
17926a79 DH |
157 | }; |
158 | ||
159 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) | |
160 | ||
17926a79 DH |
161 | /* |
162 | * RxRPC security module interface | |
163 | */ | |
164 | struct rxrpc_security { | |
17926a79 DH |
165 | const char *name; /* name of this service */ |
166 | u8 security_index; /* security type provided */ | |
167 | ||
648af7fc DH |
168 | /* Initialise a security service */ |
169 | int (*init)(void); | |
170 | ||
171 | /* Clean up a security service */ | |
172 | void (*exit)(void); | |
173 | ||
17926a79 DH |
174 | /* initialise a connection's security */ |
175 | int (*init_connection_security)(struct rxrpc_connection *); | |
176 | ||
177 | /* prime a connection's packet security */ | |
a263629d | 178 | int (*prime_packet_security)(struct rxrpc_connection *); |
17926a79 DH |
179 | |
180 | /* impose security on a packet */ | |
a263629d | 181 | int (*secure_packet)(struct rxrpc_call *, |
17926a79 DH |
182 | struct sk_buff *, |
183 | size_t, | |
184 | void *); | |
185 | ||
186 | /* verify the security on a received packet */ | |
5a42976d | 187 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, |
248f219c DH |
188 | unsigned int, unsigned int, rxrpc_seq_t, u16); |
189 | ||
190 | /* Locate the data in a received packet that has been verified. */ | |
191 | void (*locate_data)(struct rxrpc_call *, struct sk_buff *, | |
192 | unsigned int *, unsigned int *); | |
17926a79 DH |
193 | |
194 | /* issue a challenge */ | |
195 | int (*issue_challenge)(struct rxrpc_connection *); | |
196 | ||
197 | /* respond to a challenge */ | |
198 | int (*respond_to_challenge)(struct rxrpc_connection *, | |
199 | struct sk_buff *, | |
200 | u32 *); | |
201 | ||
202 | /* verify a response */ | |
203 | int (*verify_response)(struct rxrpc_connection *, | |
204 | struct sk_buff *, | |
205 | u32 *); | |
206 | ||
207 | /* clear connection security */ | |
208 | void (*clear)(struct rxrpc_connection *); | |
209 | }; | |
210 | ||
211 | /* | |
4f95dd78 DH |
212 | * RxRPC local transport endpoint description |
213 | * - owned by a single AF_RXRPC socket | |
214 | * - pointed to by transport socket struct sk_user_data | |
17926a79 DH |
215 | */ |
216 | struct rxrpc_local { | |
4f95dd78 DH |
217 | struct rcu_head rcu; |
218 | atomic_t usage; | |
219 | struct list_head link; | |
17926a79 | 220 | struct socket *socket; /* my UDP socket */ |
4f95dd78 | 221 | struct work_struct processor; |
de8d6c74 | 222 | struct hlist_head services; /* services listening on this endpoint */ |
17926a79 | 223 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
17926a79 | 224 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ |
44ba0698 | 225 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
999b69f8 DH |
226 | struct rb_root client_conns; /* Client connections by socket params */ |
227 | spinlock_t client_conns_lock; /* Lock for client_conns */ | |
17926a79 DH |
228 | spinlock_t lock; /* access lock */ |
229 | rwlock_t services_lock; /* lock for services list */ | |
17926a79 | 230 | int debug_id; /* debug ID for printks */ |
4f95dd78 | 231 | bool dead; |
17926a79 DH |
232 | struct sockaddr_rxrpc srx; /* local address */ |
233 | }; | |
234 | ||
235 | /* | |
236 | * RxRPC remote transport endpoint definition | |
be6e6707 | 237 | * - matched by local endpoint, remote port, address and protocol type |
17926a79 DH |
238 | */ |
239 | struct rxrpc_peer { | |
be6e6707 DH |
240 | struct rcu_head rcu; /* This must be first */ |
241 | atomic_t usage; | |
242 | unsigned long hash_key; | |
243 | struct hlist_node hash_link; | |
244 | struct rxrpc_local *local; | |
f66d7490 DH |
245 | struct hlist_head error_targets; /* targets for net error distribution */ |
246 | struct work_struct error_distributor; | |
aa390bbe | 247 | struct rb_root service_conns; /* Service connections */ |
8496af50 | 248 | seqlock_t service_conn_lock; |
17926a79 | 249 | spinlock_t lock; /* access lock */ |
95c96174 ED |
250 | unsigned int if_mtu; /* interface MTU for this peer */ |
251 | unsigned int mtu; /* network MTU for this peer */ | |
252 | unsigned int maxdata; /* data size (MTU - hdrsize) */ | |
17926a79 DH |
253 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
254 | int debug_id; /* debug ID for printks */ | |
f66d7490 DH |
255 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
256 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 | |
17926a79 DH |
257 | struct sockaddr_rxrpc srx; /* remote address */ |
258 | ||
259 | /* calculated RTT cache */ | |
260 | #define RXRPC_RTT_CACHE_SIZE 32 | |
261 | suseconds_t rtt; /* current RTT estimate (in uS) */ | |
95c96174 ED |
262 | unsigned int rtt_point; /* next entry at which to insert */ |
263 | unsigned int rtt_usage; /* amount of cache actually used */ | |
17926a79 DH |
264 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
265 | }; | |
266 | ||
19ffa01c DH |
267 | /* |
268 | * Keys for matching a connection. | |
269 | */ | |
270 | struct rxrpc_conn_proto { | |
e8d70ce1 DH |
271 | union { |
272 | struct { | |
273 | u32 epoch; /* epoch of this connection */ | |
274 | u32 cid; /* connection ID */ | |
275 | }; | |
276 | u64 index_key; | |
19ffa01c DH |
277 | }; |
278 | }; | |
279 | ||
280 | struct rxrpc_conn_parameters { | |
281 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
282 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
283 | struct key *key; /* Security details */ | |
284 | bool exclusive; /* T if conn is exclusive */ | |
285 | u16 service_id; /* Service ID for this connection */ | |
286 | u32 security_level; /* Security level selected */ | |
287 | }; | |
288 | ||
bba304db DH |
289 | /* |
290 | * Bits in the connection flags. | |
291 | */ | |
292 | enum rxrpc_conn_flag { | |
293 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ | |
001c1122 DH |
294 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
295 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ | |
45025bce DH |
296 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
297 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ | |
298 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ | |
bba304db DH |
299 | }; |
300 | ||
301 | /* | |
302 | * Events that can be raised upon a connection. | |
303 | */ | |
304 | enum rxrpc_conn_event { | |
305 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ | |
306 | }; | |
307 | ||
45025bce DH |
308 | /* |
309 | * The connection cache state. | |
310 | */ | |
311 | enum rxrpc_conn_cache_state { | |
312 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ | |
313 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ | |
314 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ | |
315 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ | |
316 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ | |
317 | }; | |
318 | ||
bba304db DH |
319 | /* |
320 | * The connection protocol state. | |
321 | */ | |
322 | enum rxrpc_conn_proto_state { | |
323 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ | |
324 | RXRPC_CONN_CLIENT, /* Client connection */ | |
00e90712 | 325 | RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ |
bba304db DH |
326 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
327 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ | |
328 | RXRPC_CONN_SERVICE, /* Service secured connection */ | |
329 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ | |
330 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ | |
bba304db DH |
331 | RXRPC_CONN__NR_STATES |
332 | }; | |
333 | ||
17926a79 DH |
334 | /* |
335 | * RxRPC connection definition | |
aa390bbe | 336 | * - matched by { local, peer, epoch, conn_id, direction } |
17926a79 DH |
337 | * - each connection can only handle four simultaneous calls |
338 | */ | |
339 | struct rxrpc_connection { | |
19ffa01c DH |
340 | struct rxrpc_conn_proto proto; |
341 | struct rxrpc_conn_parameters params; | |
342 | ||
45025bce DH |
343 | atomic_t usage; |
344 | struct rcu_head rcu; | |
345 | struct list_head cache_link; | |
a1399f8b | 346 | |
45025bce DH |
347 | spinlock_t channel_lock; |
348 | unsigned char active_chans; /* Mask of active channels */ | |
349 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) | |
350 | struct list_head waiting_calls; /* Calls waiting for channels */ | |
a1399f8b DH |
351 | struct rxrpc_channel { |
352 | struct rxrpc_call __rcu *call; /* Active call */ | |
353 | u32 call_id; /* ID of current call */ | |
354 | u32 call_counter; /* Call ID counter */ | |
355 | u32 last_call; /* ID of last call */ | |
18bfeba5 DH |
356 | u8 last_type; /* Type of last packet */ |
357 | u16 last_service_id; | |
358 | union { | |
359 | u32 last_seq; | |
360 | u32 last_abort; | |
361 | }; | |
a1399f8b | 362 | } channels[RXRPC_MAXCALLS]; |
999b69f8 | 363 | |
17926a79 | 364 | struct work_struct processor; /* connection event processor */ |
999b69f8 DH |
365 | union { |
366 | struct rb_node client_node; /* Node in local->client_conns */ | |
aa390bbe | 367 | struct rb_node service_node; /* Node in peer->service_conns */ |
999b69f8 | 368 | }; |
4d028b2c | 369 | struct list_head proc_link; /* link in procfs list */ |
17926a79 | 370 | struct list_head link; /* link in master connection list */ |
17926a79 | 371 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
648af7fc | 372 | const struct rxrpc_security *security; /* applied security module */ |
17926a79 | 373 | struct key *server_key; /* security for this service */ |
1afe593b | 374 | struct crypto_skcipher *cipher; /* encryption handle */ |
17926a79 | 375 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
4a3388c8 | 376 | unsigned long flags; |
17926a79 | 377 | unsigned long events; |
f51b4480 | 378 | unsigned long idle_timestamp; /* Time at which last became idle */ |
17926a79 | 379 | spinlock_t state_lock; /* state-change lock */ |
cf13258f DH |
380 | enum rxrpc_conn_cache_state cache_state; |
381 | enum rxrpc_conn_proto_state state; /* current state of connection */ | |
dc44b3a0 DH |
382 | u32 local_abort; /* local abort code */ |
383 | u32 remote_abort; /* remote abort code */ | |
17926a79 | 384 | int debug_id; /* debug ID for printks */ |
17926a79 | 385 | atomic_t serial; /* packet serial number counter */ |
563ea7d5 | 386 | unsigned int hi_serial; /* highest serial number received */ |
17926a79 DH |
387 | u8 size_align; /* data size alignment (for security) */ |
388 | u8 header_size; /* rxrpc + security header size */ | |
389 | u8 security_size; /* security header size */ | |
17926a79 | 390 | u32 security_nonce; /* response re-use preventer */ |
17926a79 | 391 | u8 security_ix; /* security type */ |
17926a79 DH |
392 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
393 | }; | |
394 | ||
5b8848d1 DH |
395 | /* |
396 | * Flags in call->flags. | |
397 | */ | |
398 | enum rxrpc_call_flag { | |
399 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ | |
5b8848d1 | 400 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
dabe5a79 | 401 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
45025bce | 402 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
248f219c DH |
403 | RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ |
404 | RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ | |
5b8848d1 DH |
405 | }; |
406 | ||
407 | /* | |
408 | * Events that can be raised on a call. | |
409 | */ | |
410 | enum rxrpc_call_event { | |
4c198ad1 | 411 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ |
4c198ad1 | 412 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ |
248f219c | 413 | RXRPC_CALL_EV_TIMER, /* Timer expired */ |
4c198ad1 | 414 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ |
5b8848d1 DH |
415 | }; |
416 | ||
417 | /* | |
418 | * The states that a call can be in. | |
419 | */ | |
420 | enum rxrpc_call_state { | |
999b69f8 DH |
421 | RXRPC_CALL_UNINITIALISED, |
422 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ | |
5b8848d1 DH |
423 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
424 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ | |
425 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ | |
00e90712 | 426 | RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ |
5b8848d1 DH |
427 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
428 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ | |
429 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ | |
430 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ | |
431 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ | |
432 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ | |
f5c17aae | 433 | RXRPC_CALL_COMPLETE, /* - call complete */ |
f5c17aae DH |
434 | NR__RXRPC_CALL_STATES |
435 | }; | |
436 | ||
437 | /* | |
438 | * Call completion condition (state == RXRPC_CALL_COMPLETE). | |
439 | */ | |
440 | enum rxrpc_call_completion { | |
441 | RXRPC_CALL_SUCCEEDED, /* - Normal termination */ | |
5b8848d1 DH |
442 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ |
443 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ | |
f5c17aae | 444 | RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ |
5b8848d1 | 445 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
f5c17aae | 446 | NR__RXRPC_CALL_COMPLETIONS |
5b8848d1 DH |
447 | }; |
448 | ||
17926a79 DH |
449 | /* |
450 | * RxRPC call definition | |
451 | * - matched by { connection, call_id } | |
452 | */ | |
453 | struct rxrpc_call { | |
dee46364 | 454 | struct rcu_head rcu; |
17926a79 | 455 | struct rxrpc_connection *conn; /* connection carrying call */ |
df5d8bf7 | 456 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
8d94aa38 | 457 | struct rxrpc_sock __rcu *socket; /* socket responsible */ |
248f219c DH |
458 | unsigned long ack_at; /* When deferred ACK needs to happen */ |
459 | unsigned long resend_at; /* When next resend needs to happen */ | |
460 | unsigned long expire_at; /* When the call times out */ | |
461 | struct timer_list timer; /* Combined event timer */ | |
462 | struct work_struct processor; /* Event processor */ | |
d001648e | 463 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
17926a79 | 464 | struct list_head link; /* link in master call list */ |
45025bce | 465 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
f66d7490 | 466 | struct hlist_node error_link; /* link in error distribution list */ |
248f219c DH |
467 | struct list_head accept_link; /* Link in rx->acceptq */ |
468 | struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ | |
469 | struct list_head sock_link; /* Link in rx->sock_calls */ | |
470 | struct rb_node sock_node; /* Node in rx->calls */ | |
17926a79 | 471 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
45025bce | 472 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
a263629d | 473 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
17926a79 | 474 | unsigned long user_call_ID; /* user-defined call ID */ |
17926a79 | 475 | unsigned long flags; |
17926a79 | 476 | unsigned long events; |
17926a79 DH |
477 | spinlock_t lock; |
478 | rwlock_t state_lock; /* lock for state transition */ | |
f5c17aae DH |
479 | u32 abort_code; /* Local/remote abort code */ |
480 | int error; /* Local error incurred */ | |
cf13258f DH |
481 | enum rxrpc_call_state state; /* current state of call */ |
482 | enum rxrpc_call_completion completion; /* Call completion condition */ | |
17926a79 | 483 | atomic_t usage; |
dabe5a79 | 484 | u16 service_id; /* service ID */ |
278ac0cd | 485 | u8 security_ix; /* Security type */ |
dabe5a79 DH |
486 | u32 call_id; /* call ID on connection */ |
487 | u32 cid; /* connection ID plus channel index */ | |
488 | int debug_id; /* debug ID for printks */ | |
17926a79 | 489 | |
248f219c DH |
490 | /* Rx/Tx circular buffer, depending on phase. |
491 | * | |
492 | * In the Rx phase, packets are annotated with 0 or the number of the | |
493 | * segment of a jumbo packet each buffer refers to. There can be up to | |
494 | * 47 segments in a maximum-size UDP packet. | |
495 | * | |
496 | * In the Tx phase, packets are annotated with which buffers have been | |
497 | * acked. | |
498 | */ | |
499 | #define RXRPC_RXTX_BUFF_SIZE 64 | |
500 | #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) | |
75e42126 | 501 | #define RXRPC_INIT_RX_WINDOW_SIZE 32 |
248f219c DH |
502 | struct sk_buff **rxtx_buffer; |
503 | u8 *rxtx_annotations; | |
504 | #define RXRPC_TX_ANNO_ACK 0 | |
505 | #define RXRPC_TX_ANNO_UNACK 1 | |
506 | #define RXRPC_TX_ANNO_NAK 2 | |
507 | #define RXRPC_TX_ANNO_RETRANS 3 | |
508 | #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ | |
509 | #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ | |
510 | #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ | |
511 | rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but | |
512 | * not hard-ACK'd packet follows this. | |
513 | */ | |
514 | rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ | |
515 | rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not | |
516 | * consumed packet follows this. | |
17926a79 | 517 | */ |
248f219c DH |
518 | rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ |
519 | rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ | |
520 | u8 rx_winsize; /* Size of Rx window */ | |
521 | u8 tx_winsize; /* Maximum size of Tx window */ | |
75e42126 | 522 | u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ |
17926a79 DH |
523 | |
524 | /* receive-phase ACK management */ | |
4e36a95e | 525 | u8 ackr_reason; /* reason to ACK */ |
563ea7d5 | 526 | u16 ackr_skew; /* skew on packet being ACK'd */ |
0d12f8a4 | 527 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
248f219c DH |
528 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
529 | unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ | |
530 | unsigned short rx_pkt_len; /* Current recvmsg packet len */ | |
17926a79 | 531 | |
248f219c DH |
532 | /* transmission-phase ACK management */ |
533 | rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ | |
17926a79 DH |
534 | }; |
535 | ||
fff72429 DH |
536 | enum rxrpc_call_trace { |
537 | rxrpc_call_new_client, | |
538 | rxrpc_call_new_service, | |
539 | rxrpc_call_queued, | |
540 | rxrpc_call_queued_ref, | |
541 | rxrpc_call_seen, | |
a84a46d7 DH |
542 | rxrpc_call_connected, |
543 | rxrpc_call_release, | |
fff72429 | 544 | rxrpc_call_got, |
fff72429 | 545 | rxrpc_call_got_userid, |
cbd00891 | 546 | rxrpc_call_got_kernel, |
fff72429 | 547 | rxrpc_call_put, |
fff72429 | 548 | rxrpc_call_put_userid, |
cbd00891 | 549 | rxrpc_call_put_kernel, |
fff72429 | 550 | rxrpc_call_put_noqueue, |
a84a46d7 | 551 | rxrpc_call_error, |
fff72429 DH |
552 | rxrpc_call__nr_trace |
553 | }; | |
554 | ||
555 | extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4]; | |
556 | ||
a3868bfc DH |
557 | extern const char *const rxrpc_pkts[]; |
558 | extern const char *rxrpc_acks(u8 reason); | |
559 | ||
df844fd4 DH |
560 | #include <trace/events/rxrpc.h> |
561 | ||
17926a79 | 562 | /* |
651350d1 | 563 | * af_rxrpc.c |
17926a79 | 564 | */ |
651350d1 | 565 | extern atomic_t rxrpc_n_skbs; |
0d12f8a4 | 566 | extern u32 rxrpc_epoch; |
651350d1 DH |
567 | extern atomic_t rxrpc_debug_id; |
568 | extern struct workqueue_struct *rxrpc_workqueue; | |
17926a79 DH |
569 | |
570 | /* | |
0d81a51a | 571 | * call_accept.c |
17926a79 | 572 | */ |
00e90712 DH |
573 | int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); |
574 | void rxrpc_discard_prealloc(struct rxrpc_sock *); | |
248f219c DH |
575 | struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, |
576 | struct rxrpc_connection *, | |
577 | struct sk_buff *); | |
4f95dd78 | 578 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
d001648e DH |
579 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
580 | rxrpc_notify_rx_t); | |
c1b1203d | 581 | int rxrpc_reject_call(struct rxrpc_sock *); |
17926a79 DH |
582 | |
583 | /* | |
0d81a51a | 584 | * call_event.c |
17926a79 | 585 | */ |
248f219c | 586 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool); |
c1b1203d | 587 | void rxrpc_process_call(struct work_struct *); |
17926a79 DH |
588 | |
589 | /* | |
0d81a51a | 590 | * call_object.c |
17926a79 | 591 | */ |
f5c17aae DH |
592 | extern const char *const rxrpc_call_states[]; |
593 | extern const char *const rxrpc_call_completions[]; | |
dad8aff7 | 594 | extern unsigned int rxrpc_max_call_lifetime; |
17926a79 DH |
595 | extern struct kmem_cache *rxrpc_call_jar; |
596 | extern struct list_head rxrpc_calls; | |
597 | extern rwlock_t rxrpc_call_lock; | |
598 | ||
2341e077 | 599 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
00e90712 | 600 | struct rxrpc_call *rxrpc_alloc_call(gfp_t); |
2341e077 | 601 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
19ffa01c | 602 | struct rxrpc_conn_parameters *, |
999b69f8 | 603 | struct sockaddr_rxrpc *, |
2341e077 | 604 | unsigned long, gfp_t); |
248f219c DH |
605 | void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, |
606 | struct sk_buff *); | |
8d94aa38 | 607 | void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); |
c1b1203d | 608 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
8d94aa38 DH |
609 | bool __rxrpc_queue_call(struct rxrpc_call *); |
610 | bool rxrpc_queue_call(struct rxrpc_call *); | |
e34d4234 | 611 | void rxrpc_see_call(struct rxrpc_call *); |
fff72429 DH |
612 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
613 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); | |
00e90712 | 614 | void rxrpc_cleanup_call(struct rxrpc_call *); |
c1b1203d | 615 | void __exit rxrpc_destroy_all_calls(void); |
17926a79 | 616 | |
dabe5a79 DH |
617 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
618 | { | |
619 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); | |
620 | } | |
621 | ||
622 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) | |
623 | { | |
624 | return !rxrpc_is_service_call(call); | |
625 | } | |
626 | ||
f5c17aae DH |
627 | /* |
628 | * Transition a call to the complete state. | |
629 | */ | |
630 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, | |
631 | enum rxrpc_call_completion compl, | |
632 | u32 abort_code, | |
633 | int error) | |
634 | { | |
635 | if (call->state < RXRPC_CALL_COMPLETE) { | |
636 | call->abort_code = abort_code; | |
637 | call->error = error; | |
638 | call->completion = compl, | |
639 | call->state = RXRPC_CALL_COMPLETE; | |
640 | return true; | |
641 | } | |
642 | return false; | |
643 | } | |
644 | ||
645 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, | |
646 | enum rxrpc_call_completion compl, | |
647 | u32 abort_code, | |
648 | int error) | |
649 | { | |
e8d6bbb0 | 650 | bool ret; |
f5c17aae DH |
651 | |
652 | write_lock_bh(&call->state_lock); | |
653 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); | |
654 | write_unlock_bh(&call->state_lock); | |
655 | return ret; | |
656 | } | |
657 | ||
658 | /* | |
659 | * Record that a call successfully completed. | |
660 | */ | |
e8d6bbb0 | 661 | static inline bool __rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 662 | { |
e8d6bbb0 | 663 | return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
f5c17aae DH |
664 | } |
665 | ||
e8d6bbb0 | 666 | static inline bool rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 667 | { |
e8d6bbb0 DH |
668 | bool ret; |
669 | ||
f5c17aae | 670 | write_lock_bh(&call->state_lock); |
e8d6bbb0 | 671 | ret = __rxrpc_call_completed(call); |
f5c17aae | 672 | write_unlock_bh(&call->state_lock); |
e8d6bbb0 | 673 | return ret; |
f5c17aae DH |
674 | } |
675 | ||
676 | /* | |
677 | * Record that a call is locally aborted. | |
678 | */ | |
5a42976d DH |
679 | static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
680 | rxrpc_seq_t seq, | |
f5c17aae DH |
681 | u32 abort_code, int error) |
682 | { | |
5a42976d DH |
683 | trace_rxrpc_abort(why, call->cid, call->call_id, seq, |
684 | abort_code, error); | |
248f219c DH |
685 | return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, |
686 | abort_code, error); | |
f5c17aae DH |
687 | } |
688 | ||
5a42976d DH |
689 | static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
690 | rxrpc_seq_t seq, u32 abort_code, int error) | |
f5c17aae DH |
691 | { |
692 | bool ret; | |
693 | ||
694 | write_lock_bh(&call->state_lock); | |
5a42976d | 695 | ret = __rxrpc_abort_call(why, call, seq, abort_code, error); |
f5c17aae DH |
696 | write_unlock_bh(&call->state_lock); |
697 | return ret; | |
698 | } | |
699 | ||
4a3388c8 DH |
700 | /* |
701 | * conn_client.c | |
702 | */ | |
45025bce DH |
703 | extern unsigned int rxrpc_max_client_connections; |
704 | extern unsigned int rxrpc_reap_client_connections; | |
705 | extern unsigned int rxrpc_conn_idle_client_expiry; | |
706 | extern unsigned int rxrpc_conn_idle_client_fast_expiry; | |
4a3388c8 DH |
707 | extern struct idr rxrpc_client_conn_ids; |
708 | ||
eb9b9d22 | 709 | void rxrpc_destroy_client_conn_ids(void); |
c6d2b8d7 DH |
710 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
711 | struct sockaddr_rxrpc *, gfp_t); | |
45025bce DH |
712 | void rxrpc_expose_client_call(struct rxrpc_call *); |
713 | void rxrpc_disconnect_client_call(struct rxrpc_call *); | |
714 | void rxrpc_put_client_conn(struct rxrpc_connection *); | |
715 | void __exit rxrpc_destroy_all_client_connections(void); | |
4a3388c8 | 716 | |
17926a79 | 717 | /* |
0d81a51a DH |
718 | * conn_event.c |
719 | */ | |
720 | void rxrpc_process_connection(struct work_struct *); | |
0d81a51a DH |
721 | |
722 | /* | |
723 | * conn_object.c | |
17926a79 | 724 | */ |
dad8aff7 | 725 | extern unsigned int rxrpc_connection_expiry; |
17926a79 | 726 | extern struct list_head rxrpc_connections; |
4d028b2c | 727 | extern struct list_head rxrpc_connection_proc_list; |
17926a79 DH |
728 | extern rwlock_t rxrpc_connection_lock; |
729 | ||
8496af50 | 730 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
c6d2b8d7 | 731 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
8496af50 DH |
732 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
733 | struct sk_buff *); | |
45025bce | 734 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
999b69f8 | 735 | void rxrpc_disconnect_call(struct rxrpc_call *); |
45025bce | 736 | void rxrpc_kill_connection(struct rxrpc_connection *); |
f51b4480 | 737 | void __rxrpc_put_connection(struct rxrpc_connection *); |
c1b1203d | 738 | void __exit rxrpc_destroy_all_connections(void); |
17926a79 | 739 | |
19ffa01c DH |
740 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
741 | { | |
742 | return conn->out_clientflag; | |
743 | } | |
744 | ||
745 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) | |
746 | { | |
e8d70ce1 | 747 | return !rxrpc_conn_is_client(conn); |
19ffa01c DH |
748 | } |
749 | ||
5627cc8b DH |
750 | static inline void rxrpc_get_connection(struct rxrpc_connection *conn) |
751 | { | |
752 | atomic_inc(&conn->usage); | |
753 | } | |
754 | ||
2c4579e4 DH |
755 | static inline |
756 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) | |
757 | { | |
758 | return atomic_inc_not_zero(&conn->usage) ? conn : NULL; | |
759 | } | |
5acbee46 | 760 | |
f51b4480 DH |
761 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
762 | { | |
45025bce DH |
763 | if (!conn) |
764 | return; | |
765 | ||
766 | if (rxrpc_conn_is_client(conn)) { | |
767 | if (atomic_dec_and_test(&conn->usage)) | |
768 | rxrpc_put_client_conn(conn); | |
769 | } else { | |
770 | if (atomic_dec_return(&conn->usage) == 1) | |
771 | __rxrpc_put_connection(conn); | |
772 | } | |
f51b4480 DH |
773 | } |
774 | ||
8496af50 | 775 | static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
5acbee46 | 776 | { |
8496af50 DH |
777 | if (!rxrpc_get_connection_maybe(conn)) |
778 | return false; | |
779 | if (!rxrpc_queue_work(&conn->processor)) | |
2c4579e4 | 780 | rxrpc_put_connection(conn); |
8496af50 | 781 | return true; |
5acbee46 DH |
782 | } |
783 | ||
7877a4a4 DH |
784 | /* |
785 | * conn_service.c | |
786 | */ | |
8496af50 DH |
787 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
788 | struct sk_buff *); | |
00e90712 | 789 | struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t); |
248f219c | 790 | void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *); |
001c1122 | 791 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
7877a4a4 | 792 | |
17926a79 | 793 | /* |
0d81a51a | 794 | * input.c |
17926a79 | 795 | */ |
0d81a51a | 796 | void rxrpc_data_ready(struct sock *); |
17926a79 DH |
797 | |
798 | /* | |
0d81a51a | 799 | * insecure.c |
17926a79 | 800 | */ |
0d81a51a | 801 | extern const struct rxrpc_security rxrpc_no_security; |
17926a79 DH |
802 | |
803 | /* | |
0d81a51a | 804 | * key.c |
17926a79 | 805 | */ |
0d81a51a DH |
806 | extern struct key_type key_type_rxrpc; |
807 | extern struct key_type key_type_rxrpc_s; | |
808 | ||
809 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); | |
810 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
811 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, | |
812 | u32); | |
17926a79 | 813 | |
87563616 DH |
814 | /* |
815 | * local_event.c | |
816 | */ | |
4f95dd78 | 817 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
87563616 | 818 | |
17926a79 | 819 | /* |
0d81a51a | 820 | * local_object.c |
17926a79 | 821 | */ |
4f95dd78 DH |
822 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
823 | void __rxrpc_put_local(struct rxrpc_local *); | |
c1b1203d | 824 | void __exit rxrpc_destroy_all_locals(void); |
17926a79 | 825 | |
4f95dd78 DH |
826 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
827 | { | |
828 | atomic_inc(&local->usage); | |
829 | } | |
830 | ||
831 | static inline | |
832 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) | |
833 | { | |
834 | return atomic_inc_not_zero(&local->usage) ? local : NULL; | |
835 | } | |
836 | ||
837 | static inline void rxrpc_put_local(struct rxrpc_local *local) | |
838 | { | |
5627cc8b | 839 | if (local && atomic_dec_and_test(&local->usage)) |
4f95dd78 DH |
840 | __rxrpc_put_local(local); |
841 | } | |
842 | ||
5acbee46 DH |
843 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
844 | { | |
845 | rxrpc_queue_work(&local->processor); | |
846 | } | |
847 | ||
17926a79 | 848 | /* |
0d81a51a | 849 | * misc.c |
17926a79 | 850 | */ |
0d81a51a DH |
851 | extern unsigned int rxrpc_max_backlog __read_mostly; |
852 | extern unsigned int rxrpc_requested_ack_delay; | |
853 | extern unsigned int rxrpc_soft_ack_delay; | |
854 | extern unsigned int rxrpc_idle_ack_delay; | |
855 | extern unsigned int rxrpc_rx_window_size; | |
856 | extern unsigned int rxrpc_rx_mtu; | |
857 | extern unsigned int rxrpc_rx_jumbo_max; | |
0b58b8a1 | 858 | extern unsigned int rxrpc_resend_timeout; |
17926a79 | 859 | |
0d81a51a DH |
860 | extern const s8 rxrpc_ack_priority[]; |
861 | ||
17926a79 | 862 | /* |
0d81a51a | 863 | * output.c |
17926a79 | 864 | */ |
8d94aa38 | 865 | int rxrpc_send_call_packet(struct rxrpc_call *, u8); |
985a5c82 | 866 | int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); |
248f219c | 867 | void rxrpc_reject_packets(struct rxrpc_local *); |
17926a79 DH |
868 | |
869 | /* | |
abe89ef0 | 870 | * peer_event.c |
0d81a51a | 871 | */ |
abe89ef0 | 872 | void rxrpc_error_report(struct sock *); |
f66d7490 | 873 | void rxrpc_peer_error_distributor(struct work_struct *); |
0d81a51a DH |
874 | |
875 | /* | |
876 | * peer_object.c | |
17926a79 | 877 | */ |
be6e6707 DH |
878 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
879 | const struct sockaddr_rxrpc *); | |
880 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, | |
881 | struct sockaddr_rxrpc *, gfp_t); | |
882 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); | |
248f219c DH |
883 | struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, |
884 | struct rxrpc_peer *); | |
be6e6707 | 885 | |
df5d8bf7 | 886 | static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
be6e6707 DH |
887 | { |
888 | atomic_inc(&peer->usage); | |
df5d8bf7 | 889 | return peer; |
be6e6707 DH |
890 | } |
891 | ||
892 | static inline | |
893 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) | |
894 | { | |
895 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; | |
896 | } | |
897 | ||
898 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); | |
899 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) | |
900 | { | |
5627cc8b | 901 | if (peer && atomic_dec_and_test(&peer->usage)) |
be6e6707 DH |
902 | __rxrpc_put_peer(peer); |
903 | } | |
17926a79 DH |
904 | |
905 | /* | |
0d81a51a | 906 | * proc.c |
17926a79 | 907 | */ |
036c2e27 JE |
908 | extern const struct file_operations rxrpc_call_seq_fops; |
909 | extern const struct file_operations rxrpc_connection_seq_fops; | |
17926a79 DH |
910 | |
911 | /* | |
0d81a51a | 912 | * recvmsg.c |
17926a79 | 913 | */ |
248f219c | 914 | void rxrpc_notify_socket(struct rxrpc_call *); |
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 | |
248f219c DH |
964 | static inline bool before(u32 seq1, u32 seq2) |
965 | { | |
966 | return (s32)(seq1 - seq2) < 0; | |
967 | } | |
968 | static inline bool before_eq(u32 seq1, u32 seq2) | |
969 | { | |
970 | return (s32)(seq1 - seq2) <= 0; | |
971 | } | |
972 | static inline bool after(u32 seq1, u32 seq2) | |
973 | { | |
974 | return (s32)(seq1 - seq2) > 0; | |
975 | } | |
976 | static inline bool after_eq(u32 seq1, u32 seq2) | |
977 | { | |
978 | return (s32)(seq1 - seq2) >= 0; | |
979 | } | |
980 | ||
17926a79 DH |
981 | /* |
982 | * debug tracing | |
983 | */ | |
95c96174 | 984 | extern unsigned int rxrpc_debug; |
17926a79 DH |
985 | |
986 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 987 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 988 | |
0dc47877 HH |
989 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
990 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 DH |
991 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
992 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
993 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
994 | ||
995 | ||
996 | #if defined(__KDEBUG) | |
997 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
998 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
999 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1000 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
1001 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
1002 | ||
1003 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
1004 | #define RXRPC_DEBUG_KENTER 0x01 | |
1005 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
1006 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
1007 | #define RXRPC_DEBUG_KPROTO 0x08 | |
1008 | #define RXRPC_DEBUG_KNET 0x10 | |
1009 | ||
1010 | #define _enter(FMT,...) \ | |
1011 | do { \ | |
1012 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
1013 | kenter(FMT,##__VA_ARGS__); \ | |
1014 | } while (0) | |
1015 | ||
1016 | #define _leave(FMT,...) \ | |
1017 | do { \ | |
1018 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
1019 | kleave(FMT,##__VA_ARGS__); \ | |
1020 | } while (0) | |
1021 | ||
1022 | #define _debug(FMT,...) \ | |
1023 | do { \ | |
1024 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
1025 | kdebug(FMT,##__VA_ARGS__); \ | |
1026 | } while (0) | |
1027 | ||
1028 | #define _proto(FMT,...) \ | |
1029 | do { \ | |
1030 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
1031 | kproto(FMT,##__VA_ARGS__); \ | |
1032 | } while (0) | |
1033 | ||
1034 | #define _net(FMT,...) \ | |
1035 | do { \ | |
1036 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
1037 | knet(FMT,##__VA_ARGS__); \ | |
1038 | } while (0) | |
1039 | ||
1040 | #else | |
12fdff3f DH |
1041 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1042 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1043 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
1044 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) | |
1045 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) | |
17926a79 DH |
1046 | #endif |
1047 | ||
1048 | /* | |
1049 | * debug assertion checking | |
1050 | */ | |
1051 | #if 1 // defined(__KDEBUGALL) | |
1052 | ||
1053 | #define ASSERT(X) \ | |
1054 | do { \ | |
1055 | if (unlikely(!(X))) { \ | |
9b6d5398 | 1056 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1057 | BUG(); \ |
1058 | } \ | |
b4f1342f | 1059 | } while (0) |
17926a79 DH |
1060 | |
1061 | #define ASSERTCMP(X, OP, Y) \ | |
1062 | do { \ | |
cf13258f DH |
1063 | __typeof__(X) _x = (X); \ |
1064 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 | 1065 | if (unlikely(!(_x OP _y))) { \ |
cf13258f DH |
1066 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
1067 | (unsigned long)_x, (unsigned long)_x, #OP, \ | |
1068 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1069 | BUG(); \ |
1070 | } \ | |
b4f1342f | 1071 | } while (0) |
17926a79 DH |
1072 | |
1073 | #define ASSERTIF(C, X) \ | |
1074 | do { \ | |
1075 | if (unlikely((C) && !(X))) { \ | |
9b6d5398 | 1076 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1077 | BUG(); \ |
1078 | } \ | |
b4f1342f | 1079 | } while (0) |
17926a79 DH |
1080 | |
1081 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1082 | do { \ | |
cf13258f DH |
1083 | __typeof__(X) _x = (X); \ |
1084 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 JP |
1085 | if (unlikely((C) && !(_x OP _y))) { \ |
1086 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
cf13258f DH |
1087 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
1088 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1089 | BUG(); \ |
1090 | } \ | |
b4f1342f | 1091 | } while (0) |
17926a79 DH |
1092 | |
1093 | #else | |
1094 | ||
1095 | #define ASSERT(X) \ | |
1096 | do { \ | |
b4f1342f | 1097 | } while (0) |
17926a79 DH |
1098 | |
1099 | #define ASSERTCMP(X, OP, Y) \ | |
1100 | do { \ | |
b4f1342f | 1101 | } while (0) |
17926a79 DH |
1102 | |
1103 | #define ASSERTIF(C, X) \ | |
1104 | do { \ | |
b4f1342f | 1105 | } while (0) |
17926a79 DH |
1106 | |
1107 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1108 | do { \ | |
b4f1342f | 1109 | } while (0) |
17926a79 DH |
1110 | |
1111 | #endif /* __KDEBUGALL */ |