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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 | |
cf1a6474 DH |
261 | u64 rtt; /* Current RTT estimate (in nS) */ |
262 | u64 rtt_sum; /* Sum of cache contents */ | |
263 | u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ | |
264 | u8 rtt_cursor; /* next entry at which to insert */ | |
265 | u8 rtt_usage; /* amount of cache actually used */ | |
17926a79 DH |
266 | }; |
267 | ||
19ffa01c DH |
268 | /* |
269 | * Keys for matching a connection. | |
270 | */ | |
271 | struct rxrpc_conn_proto { | |
e8d70ce1 DH |
272 | union { |
273 | struct { | |
274 | u32 epoch; /* epoch of this connection */ | |
275 | u32 cid; /* connection ID */ | |
276 | }; | |
277 | u64 index_key; | |
19ffa01c DH |
278 | }; |
279 | }; | |
280 | ||
281 | struct rxrpc_conn_parameters { | |
282 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
283 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
284 | struct key *key; /* Security details */ | |
285 | bool exclusive; /* T if conn is exclusive */ | |
286 | u16 service_id; /* Service ID for this connection */ | |
287 | u32 security_level; /* Security level selected */ | |
288 | }; | |
289 | ||
bba304db DH |
290 | /* |
291 | * Bits in the connection flags. | |
292 | */ | |
293 | enum rxrpc_conn_flag { | |
294 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ | |
001c1122 DH |
295 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
296 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ | |
45025bce DH |
297 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
298 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ | |
299 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ | |
bba304db DH |
300 | }; |
301 | ||
302 | /* | |
303 | * Events that can be raised upon a connection. | |
304 | */ | |
305 | enum rxrpc_conn_event { | |
306 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ | |
307 | }; | |
308 | ||
45025bce DH |
309 | /* |
310 | * The connection cache state. | |
311 | */ | |
312 | enum rxrpc_conn_cache_state { | |
313 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ | |
314 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ | |
315 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ | |
316 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ | |
317 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ | |
363deeab | 318 | RXRPC_CONN__NR_CACHE_STATES |
45025bce DH |
319 | }; |
320 | ||
bba304db DH |
321 | /* |
322 | * The connection protocol state. | |
323 | */ | |
324 | enum rxrpc_conn_proto_state { | |
325 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ | |
326 | RXRPC_CONN_CLIENT, /* Client connection */ | |
00e90712 | 327 | RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ |
bba304db DH |
328 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
329 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ | |
330 | RXRPC_CONN_SERVICE, /* Service secured connection */ | |
331 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ | |
332 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ | |
bba304db DH |
333 | RXRPC_CONN__NR_STATES |
334 | }; | |
335 | ||
17926a79 DH |
336 | /* |
337 | * RxRPC connection definition | |
aa390bbe | 338 | * - matched by { local, peer, epoch, conn_id, direction } |
17926a79 DH |
339 | * - each connection can only handle four simultaneous calls |
340 | */ | |
341 | struct rxrpc_connection { | |
19ffa01c DH |
342 | struct rxrpc_conn_proto proto; |
343 | struct rxrpc_conn_parameters params; | |
344 | ||
45025bce DH |
345 | atomic_t usage; |
346 | struct rcu_head rcu; | |
347 | struct list_head cache_link; | |
a1399f8b | 348 | |
45025bce DH |
349 | spinlock_t channel_lock; |
350 | unsigned char active_chans; /* Mask of active channels */ | |
351 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) | |
352 | struct list_head waiting_calls; /* Calls waiting for channels */ | |
a1399f8b DH |
353 | struct rxrpc_channel { |
354 | struct rxrpc_call __rcu *call; /* Active call */ | |
355 | u32 call_id; /* ID of current call */ | |
356 | u32 call_counter; /* Call ID counter */ | |
357 | u32 last_call; /* ID of last call */ | |
18bfeba5 DH |
358 | u8 last_type; /* Type of last packet */ |
359 | u16 last_service_id; | |
360 | union { | |
361 | u32 last_seq; | |
362 | u32 last_abort; | |
363 | }; | |
a1399f8b | 364 | } channels[RXRPC_MAXCALLS]; |
999b69f8 | 365 | |
17926a79 | 366 | struct work_struct processor; /* connection event processor */ |
999b69f8 DH |
367 | union { |
368 | struct rb_node client_node; /* Node in local->client_conns */ | |
aa390bbe | 369 | struct rb_node service_node; /* Node in peer->service_conns */ |
999b69f8 | 370 | }; |
4d028b2c | 371 | struct list_head proc_link; /* link in procfs list */ |
17926a79 | 372 | struct list_head link; /* link in master connection list */ |
17926a79 | 373 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
648af7fc | 374 | const struct rxrpc_security *security; /* applied security module */ |
17926a79 | 375 | struct key *server_key; /* security for this service */ |
1afe593b | 376 | struct crypto_skcipher *cipher; /* encryption handle */ |
17926a79 | 377 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
4a3388c8 | 378 | unsigned long flags; |
17926a79 | 379 | unsigned long events; |
f51b4480 | 380 | unsigned long idle_timestamp; /* Time at which last became idle */ |
17926a79 | 381 | spinlock_t state_lock; /* state-change lock */ |
cf13258f DH |
382 | enum rxrpc_conn_cache_state cache_state; |
383 | enum rxrpc_conn_proto_state state; /* current state of connection */ | |
dc44b3a0 DH |
384 | u32 local_abort; /* local abort code */ |
385 | u32 remote_abort; /* remote abort code */ | |
17926a79 | 386 | int debug_id; /* debug ID for printks */ |
17926a79 | 387 | atomic_t serial; /* packet serial number counter */ |
563ea7d5 | 388 | unsigned int hi_serial; /* highest serial number received */ |
5a924b89 | 389 | u32 security_nonce; /* response re-use preventer */ |
17926a79 | 390 | u8 size_align; /* data size alignment (for security) */ |
17926a79 | 391 | u8 security_size; /* security header size */ |
17926a79 | 392 | u8 security_ix; /* security type */ |
17926a79 DH |
393 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
394 | }; | |
395 | ||
5b8848d1 DH |
396 | /* |
397 | * Flags in call->flags. | |
398 | */ | |
399 | enum rxrpc_call_flag { | |
400 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ | |
5b8848d1 | 401 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
dabe5a79 | 402 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
45025bce | 403 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
248f219c DH |
404 | RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ |
405 | RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ | |
5b8848d1 DH |
406 | }; |
407 | ||
408 | /* | |
409 | * Events that can be raised on a call. | |
410 | */ | |
411 | enum rxrpc_call_event { | |
4c198ad1 | 412 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ |
4c198ad1 | 413 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ |
248f219c | 414 | RXRPC_CALL_EV_TIMER, /* Timer expired */ |
4c198ad1 | 415 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ |
5b8848d1 DH |
416 | }; |
417 | ||
418 | /* | |
419 | * The states that a call can be in. | |
420 | */ | |
421 | enum rxrpc_call_state { | |
999b69f8 DH |
422 | RXRPC_CALL_UNINITIALISED, |
423 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ | |
5b8848d1 DH |
424 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
425 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ | |
426 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ | |
00e90712 | 427 | RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ |
5b8848d1 DH |
428 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
429 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ | |
430 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ | |
431 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ | |
432 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ | |
433 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ | |
f5c17aae | 434 | RXRPC_CALL_COMPLETE, /* - call complete */ |
f5c17aae DH |
435 | NR__RXRPC_CALL_STATES |
436 | }; | |
437 | ||
438 | /* | |
439 | * Call completion condition (state == RXRPC_CALL_COMPLETE). | |
440 | */ | |
441 | enum rxrpc_call_completion { | |
442 | RXRPC_CALL_SUCCEEDED, /* - Normal termination */ | |
5b8848d1 DH |
443 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ |
444 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ | |
f5c17aae | 445 | RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ |
5b8848d1 | 446 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
f5c17aae | 447 | NR__RXRPC_CALL_COMPLETIONS |
5b8848d1 DH |
448 | }; |
449 | ||
17926a79 DH |
450 | /* |
451 | * RxRPC call definition | |
452 | * - matched by { connection, call_id } | |
453 | */ | |
454 | struct rxrpc_call { | |
dee46364 | 455 | struct rcu_head rcu; |
17926a79 | 456 | struct rxrpc_connection *conn; /* connection carrying call */ |
df5d8bf7 | 457 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
8d94aa38 | 458 | struct rxrpc_sock __rcu *socket; /* socket responsible */ |
248f219c DH |
459 | unsigned long ack_at; /* When deferred ACK needs to happen */ |
460 | unsigned long resend_at; /* When next resend needs to happen */ | |
461 | unsigned long expire_at; /* When the call times out */ | |
462 | struct timer_list timer; /* Combined event timer */ | |
463 | struct work_struct processor; /* Event processor */ | |
d001648e | 464 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
17926a79 | 465 | struct list_head link; /* link in master call list */ |
45025bce | 466 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
f66d7490 | 467 | struct hlist_node error_link; /* link in error distribution list */ |
248f219c DH |
468 | struct list_head accept_link; /* Link in rx->acceptq */ |
469 | struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ | |
470 | struct list_head sock_link; /* Link in rx->sock_calls */ | |
471 | struct rb_node sock_node; /* Node in rx->calls */ | |
17926a79 | 472 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
45025bce | 473 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
a263629d | 474 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
17926a79 | 475 | unsigned long user_call_ID; /* user-defined call ID */ |
17926a79 | 476 | unsigned long flags; |
17926a79 | 477 | unsigned long events; |
17926a79 DH |
478 | spinlock_t lock; |
479 | rwlock_t state_lock; /* lock for state transition */ | |
f5c17aae DH |
480 | u32 abort_code; /* Local/remote abort code */ |
481 | int error; /* Local error incurred */ | |
cf13258f DH |
482 | enum rxrpc_call_state state; /* current state of call */ |
483 | enum rxrpc_call_completion completion; /* Call completion condition */ | |
17926a79 | 484 | atomic_t usage; |
dabe5a79 | 485 | u16 service_id; /* service ID */ |
278ac0cd | 486 | u8 security_ix; /* Security type */ |
dabe5a79 DH |
487 | u32 call_id; /* call ID on connection */ |
488 | u32 cid; /* connection ID plus channel index */ | |
489 | int debug_id; /* debug ID for printks */ | |
17926a79 | 490 | |
248f219c DH |
491 | /* Rx/Tx circular buffer, depending on phase. |
492 | * | |
493 | * In the Rx phase, packets are annotated with 0 or the number of the | |
494 | * segment of a jumbo packet each buffer refers to. There can be up to | |
495 | * 47 segments in a maximum-size UDP packet. | |
496 | * | |
497 | * In the Tx phase, packets are annotated with which buffers have been | |
498 | * acked. | |
499 | */ | |
500 | #define RXRPC_RXTX_BUFF_SIZE 64 | |
501 | #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) | |
75e42126 | 502 | #define RXRPC_INIT_RX_WINDOW_SIZE 32 |
248f219c DH |
503 | struct sk_buff **rxtx_buffer; |
504 | u8 *rxtx_annotations; | |
505 | #define RXRPC_TX_ANNO_ACK 0 | |
506 | #define RXRPC_TX_ANNO_UNACK 1 | |
507 | #define RXRPC_TX_ANNO_NAK 2 | |
508 | #define RXRPC_TX_ANNO_RETRANS 3 | |
f07373ea DH |
509 | #define RXRPC_TX_ANNO_MASK 0x03 |
510 | #define RXRPC_TX_ANNO_RESENT 0x04 | |
248f219c DH |
511 | #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ |
512 | #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ | |
513 | #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ | |
514 | rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but | |
515 | * not hard-ACK'd packet follows this. | |
516 | */ | |
517 | rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ | |
518 | rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not | |
519 | * consumed packet follows this. | |
17926a79 | 520 | */ |
248f219c DH |
521 | rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ |
522 | rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ | |
523 | u8 rx_winsize; /* Size of Rx window */ | |
524 | u8 tx_winsize; /* Maximum size of Tx window */ | |
71f3ca40 | 525 | bool tx_phase; /* T if transmission phase, F if receive phase */ |
75e42126 | 526 | u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ |
17926a79 DH |
527 | |
528 | /* receive-phase ACK management */ | |
4e36a95e | 529 | u8 ackr_reason; /* reason to ACK */ |
563ea7d5 | 530 | u16 ackr_skew; /* skew on packet being ACK'd */ |
0d12f8a4 | 531 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
248f219c DH |
532 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
533 | unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ | |
534 | unsigned short rx_pkt_len; /* Current recvmsg packet len */ | |
17926a79 | 535 | |
248f219c DH |
536 | /* transmission-phase ACK management */ |
537 | rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ | |
17926a79 DH |
538 | }; |
539 | ||
71f3ca40 DH |
540 | enum rxrpc_skb_trace { |
541 | rxrpc_skb_rx_cleaned, | |
542 | rxrpc_skb_rx_freed, | |
543 | rxrpc_skb_rx_got, | |
544 | rxrpc_skb_rx_lost, | |
545 | rxrpc_skb_rx_received, | |
546 | rxrpc_skb_rx_rotated, | |
547 | rxrpc_skb_rx_purged, | |
548 | rxrpc_skb_rx_seen, | |
549 | rxrpc_skb_tx_cleaned, | |
550 | rxrpc_skb_tx_freed, | |
551 | rxrpc_skb_tx_got, | |
552 | rxrpc_skb_tx_lost, | |
553 | rxrpc_skb_tx_new, | |
554 | rxrpc_skb_tx_rotated, | |
555 | rxrpc_skb_tx_seen, | |
556 | rxrpc_skb__nr_trace | |
557 | }; | |
558 | ||
559 | extern const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7]; | |
560 | ||
363deeab DH |
561 | enum rxrpc_conn_trace { |
562 | rxrpc_conn_new_client, | |
563 | rxrpc_conn_new_service, | |
564 | rxrpc_conn_queued, | |
565 | rxrpc_conn_seen, | |
566 | rxrpc_conn_got, | |
567 | rxrpc_conn_put_client, | |
568 | rxrpc_conn_put_service, | |
569 | rxrpc_conn__nr_trace | |
570 | }; | |
571 | ||
572 | extern const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4]; | |
573 | ||
574 | enum rxrpc_client_trace { | |
575 | rxrpc_client_activate_chans, | |
576 | rxrpc_client_alloc, | |
577 | rxrpc_client_chan_activate, | |
578 | rxrpc_client_chan_disconnect, | |
579 | rxrpc_client_chan_pass, | |
580 | rxrpc_client_chan_unstarted, | |
581 | rxrpc_client_cleanup, | |
582 | rxrpc_client_count, | |
583 | rxrpc_client_discard, | |
584 | rxrpc_client_duplicate, | |
585 | rxrpc_client_exposed, | |
586 | rxrpc_client_replace, | |
587 | rxrpc_client_to_active, | |
588 | rxrpc_client_to_culled, | |
589 | rxrpc_client_to_idle, | |
590 | rxrpc_client_to_inactive, | |
591 | rxrpc_client_to_waiting, | |
592 | rxrpc_client_uncount, | |
593 | rxrpc_client__nr_trace | |
594 | }; | |
595 | ||
596 | extern const char rxrpc_client_traces[rxrpc_client__nr_trace][7]; | |
597 | extern const char rxrpc_conn_cache_states[RXRPC_CONN__NR_CACHE_STATES][5]; | |
598 | ||
fff72429 DH |
599 | enum rxrpc_call_trace { |
600 | rxrpc_call_new_client, | |
601 | rxrpc_call_new_service, | |
602 | rxrpc_call_queued, | |
603 | rxrpc_call_queued_ref, | |
604 | rxrpc_call_seen, | |
a84a46d7 DH |
605 | rxrpc_call_connected, |
606 | rxrpc_call_release, | |
fff72429 | 607 | rxrpc_call_got, |
fff72429 | 608 | rxrpc_call_got_userid, |
cbd00891 | 609 | rxrpc_call_got_kernel, |
fff72429 | 610 | rxrpc_call_put, |
fff72429 | 611 | rxrpc_call_put_userid, |
cbd00891 | 612 | rxrpc_call_put_kernel, |
fff72429 | 613 | rxrpc_call_put_noqueue, |
a84a46d7 | 614 | rxrpc_call_error, |
fff72429 DH |
615 | rxrpc_call__nr_trace |
616 | }; | |
617 | ||
618 | extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4]; | |
619 | ||
a124fe3e DH |
620 | enum rxrpc_transmit_trace { |
621 | rxrpc_transmit_wait, | |
622 | rxrpc_transmit_queue, | |
623 | rxrpc_transmit_queue_reqack, | |
624 | rxrpc_transmit_queue_last, | |
625 | rxrpc_transmit_rotate, | |
626 | rxrpc_transmit_end, | |
627 | rxrpc_transmit__nr_trace | |
628 | }; | |
629 | ||
630 | extern const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4]; | |
631 | ||
58dc63c9 DH |
632 | enum rxrpc_receive_trace { |
633 | rxrpc_receive_incoming, | |
634 | rxrpc_receive_queue, | |
635 | rxrpc_receive_queue_last, | |
636 | rxrpc_receive_front, | |
637 | rxrpc_receive_rotate, | |
638 | rxrpc_receive_end, | |
639 | rxrpc_receive__nr_trace | |
640 | }; | |
641 | ||
642 | extern const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4]; | |
643 | ||
84997905 DH |
644 | enum rxrpc_recvmsg_trace { |
645 | rxrpc_recvmsg_enter, | |
646 | rxrpc_recvmsg_wait, | |
647 | rxrpc_recvmsg_dequeue, | |
648 | rxrpc_recvmsg_hole, | |
649 | rxrpc_recvmsg_next, | |
650 | rxrpc_recvmsg_cont, | |
651 | rxrpc_recvmsg_full, | |
652 | rxrpc_recvmsg_data_return, | |
653 | rxrpc_recvmsg_terminal, | |
654 | rxrpc_recvmsg_to_be_accepted, | |
655 | rxrpc_recvmsg_return, | |
656 | rxrpc_recvmsg__nr_trace | |
657 | }; | |
658 | ||
659 | extern const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5]; | |
660 | ||
cf1a6474 DH |
661 | enum rxrpc_rtt_tx_trace { |
662 | rxrpc_rtt_tx_ping, | |
663 | rxrpc_rtt_tx__nr_trace | |
664 | }; | |
665 | ||
666 | extern const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5]; | |
667 | ||
668 | enum rxrpc_rtt_rx_trace { | |
669 | rxrpc_rtt_rx_ping_response, | |
670 | rxrpc_rtt_rx__nr_trace | |
671 | }; | |
672 | ||
673 | extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5]; | |
674 | ||
a3868bfc DH |
675 | extern const char *const rxrpc_pkts[]; |
676 | extern const char *rxrpc_acks(u8 reason); | |
677 | ||
df844fd4 DH |
678 | #include <trace/events/rxrpc.h> |
679 | ||
17926a79 | 680 | /* |
651350d1 | 681 | * af_rxrpc.c |
17926a79 | 682 | */ |
71f3ca40 | 683 | extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; |
0d12f8a4 | 684 | extern u32 rxrpc_epoch; |
651350d1 DH |
685 | extern atomic_t rxrpc_debug_id; |
686 | extern struct workqueue_struct *rxrpc_workqueue; | |
17926a79 DH |
687 | |
688 | /* | |
0d81a51a | 689 | * call_accept.c |
17926a79 | 690 | */ |
00e90712 DH |
691 | int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); |
692 | void rxrpc_discard_prealloc(struct rxrpc_sock *); | |
248f219c DH |
693 | struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, |
694 | struct rxrpc_connection *, | |
695 | struct sk_buff *); | |
4f95dd78 | 696 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
d001648e DH |
697 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
698 | rxrpc_notify_rx_t); | |
c1b1203d | 699 | int rxrpc_reject_call(struct rxrpc_sock *); |
17926a79 DH |
700 | |
701 | /* | |
0d81a51a | 702 | * call_event.c |
17926a79 | 703 | */ |
248f219c | 704 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool); |
c1b1203d | 705 | void rxrpc_process_call(struct work_struct *); |
17926a79 DH |
706 | |
707 | /* | |
0d81a51a | 708 | * call_object.c |
17926a79 | 709 | */ |
f5c17aae DH |
710 | extern const char *const rxrpc_call_states[]; |
711 | extern const char *const rxrpc_call_completions[]; | |
dad8aff7 | 712 | extern unsigned int rxrpc_max_call_lifetime; |
17926a79 DH |
713 | extern struct kmem_cache *rxrpc_call_jar; |
714 | extern struct list_head rxrpc_calls; | |
715 | extern rwlock_t rxrpc_call_lock; | |
716 | ||
2341e077 | 717 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
00e90712 | 718 | struct rxrpc_call *rxrpc_alloc_call(gfp_t); |
2341e077 | 719 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
19ffa01c | 720 | struct rxrpc_conn_parameters *, |
999b69f8 | 721 | struct sockaddr_rxrpc *, |
2341e077 | 722 | unsigned long, gfp_t); |
248f219c DH |
723 | void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, |
724 | struct sk_buff *); | |
8d94aa38 | 725 | void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); |
c1b1203d | 726 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
8d94aa38 DH |
727 | bool __rxrpc_queue_call(struct rxrpc_call *); |
728 | bool rxrpc_queue_call(struct rxrpc_call *); | |
e34d4234 | 729 | void rxrpc_see_call(struct rxrpc_call *); |
fff72429 DH |
730 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
731 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); | |
00e90712 | 732 | void rxrpc_cleanup_call(struct rxrpc_call *); |
c1b1203d | 733 | void __exit rxrpc_destroy_all_calls(void); |
17926a79 | 734 | |
dabe5a79 DH |
735 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
736 | { | |
737 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); | |
738 | } | |
739 | ||
740 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) | |
741 | { | |
742 | return !rxrpc_is_service_call(call); | |
743 | } | |
744 | ||
f5c17aae DH |
745 | /* |
746 | * Transition a call to the complete state. | |
747 | */ | |
748 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, | |
749 | enum rxrpc_call_completion compl, | |
750 | u32 abort_code, | |
751 | int error) | |
752 | { | |
753 | if (call->state < RXRPC_CALL_COMPLETE) { | |
754 | call->abort_code = abort_code; | |
755 | call->error = error; | |
756 | call->completion = compl, | |
757 | call->state = RXRPC_CALL_COMPLETE; | |
758 | return true; | |
759 | } | |
760 | return false; | |
761 | } | |
762 | ||
763 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, | |
764 | enum rxrpc_call_completion compl, | |
765 | u32 abort_code, | |
766 | int error) | |
767 | { | |
e8d6bbb0 | 768 | bool ret; |
f5c17aae DH |
769 | |
770 | write_lock_bh(&call->state_lock); | |
771 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); | |
772 | write_unlock_bh(&call->state_lock); | |
773 | return ret; | |
774 | } | |
775 | ||
776 | /* | |
777 | * Record that a call successfully completed. | |
778 | */ | |
e8d6bbb0 | 779 | static inline bool __rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 780 | { |
e8d6bbb0 | 781 | return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
f5c17aae DH |
782 | } |
783 | ||
e8d6bbb0 | 784 | static inline bool rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 785 | { |
e8d6bbb0 DH |
786 | bool ret; |
787 | ||
f5c17aae | 788 | write_lock_bh(&call->state_lock); |
e8d6bbb0 | 789 | ret = __rxrpc_call_completed(call); |
f5c17aae | 790 | write_unlock_bh(&call->state_lock); |
e8d6bbb0 | 791 | return ret; |
f5c17aae DH |
792 | } |
793 | ||
794 | /* | |
795 | * Record that a call is locally aborted. | |
796 | */ | |
5a42976d DH |
797 | static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
798 | rxrpc_seq_t seq, | |
f5c17aae DH |
799 | u32 abort_code, int error) |
800 | { | |
5a42976d DH |
801 | trace_rxrpc_abort(why, call->cid, call->call_id, seq, |
802 | abort_code, error); | |
248f219c DH |
803 | return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, |
804 | abort_code, error); | |
f5c17aae DH |
805 | } |
806 | ||
5a42976d DH |
807 | static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
808 | rxrpc_seq_t seq, u32 abort_code, int error) | |
f5c17aae DH |
809 | { |
810 | bool ret; | |
811 | ||
812 | write_lock_bh(&call->state_lock); | |
5a42976d | 813 | ret = __rxrpc_abort_call(why, call, seq, abort_code, error); |
f5c17aae DH |
814 | write_unlock_bh(&call->state_lock); |
815 | return ret; | |
816 | } | |
817 | ||
4a3388c8 DH |
818 | /* |
819 | * conn_client.c | |
820 | */ | |
45025bce DH |
821 | extern unsigned int rxrpc_max_client_connections; |
822 | extern unsigned int rxrpc_reap_client_connections; | |
823 | extern unsigned int rxrpc_conn_idle_client_expiry; | |
824 | extern unsigned int rxrpc_conn_idle_client_fast_expiry; | |
4a3388c8 DH |
825 | extern struct idr rxrpc_client_conn_ids; |
826 | ||
eb9b9d22 | 827 | void rxrpc_destroy_client_conn_ids(void); |
c6d2b8d7 DH |
828 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
829 | struct sockaddr_rxrpc *, gfp_t); | |
45025bce DH |
830 | void rxrpc_expose_client_call(struct rxrpc_call *); |
831 | void rxrpc_disconnect_client_call(struct rxrpc_call *); | |
832 | void rxrpc_put_client_conn(struct rxrpc_connection *); | |
833 | void __exit rxrpc_destroy_all_client_connections(void); | |
4a3388c8 | 834 | |
17926a79 | 835 | /* |
0d81a51a DH |
836 | * conn_event.c |
837 | */ | |
838 | void rxrpc_process_connection(struct work_struct *); | |
0d81a51a DH |
839 | |
840 | /* | |
841 | * conn_object.c | |
17926a79 | 842 | */ |
dad8aff7 | 843 | extern unsigned int rxrpc_connection_expiry; |
17926a79 | 844 | extern struct list_head rxrpc_connections; |
4d028b2c | 845 | extern struct list_head rxrpc_connection_proc_list; |
17926a79 DH |
846 | extern rwlock_t rxrpc_connection_lock; |
847 | ||
8496af50 | 848 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
c6d2b8d7 | 849 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
8496af50 DH |
850 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
851 | struct sk_buff *); | |
45025bce | 852 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
999b69f8 | 853 | void rxrpc_disconnect_call(struct rxrpc_call *); |
45025bce | 854 | void rxrpc_kill_connection(struct rxrpc_connection *); |
363deeab DH |
855 | bool rxrpc_queue_conn(struct rxrpc_connection *); |
856 | void rxrpc_see_connection(struct rxrpc_connection *); | |
857 | void rxrpc_get_connection(struct rxrpc_connection *); | |
858 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); | |
859 | void rxrpc_put_service_conn(struct rxrpc_connection *); | |
c1b1203d | 860 | void __exit rxrpc_destroy_all_connections(void); |
17926a79 | 861 | |
19ffa01c DH |
862 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
863 | { | |
864 | return conn->out_clientflag; | |
865 | } | |
866 | ||
867 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) | |
868 | { | |
e8d70ce1 | 869 | return !rxrpc_conn_is_client(conn); |
19ffa01c DH |
870 | } |
871 | ||
f51b4480 DH |
872 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
873 | { | |
45025bce DH |
874 | if (!conn) |
875 | return; | |
876 | ||
363deeab DH |
877 | if (rxrpc_conn_is_client(conn)) |
878 | rxrpc_put_client_conn(conn); | |
879 | else | |
880 | rxrpc_put_service_conn(conn); | |
5acbee46 DH |
881 | } |
882 | ||
7877a4a4 DH |
883 | /* |
884 | * conn_service.c | |
885 | */ | |
8496af50 DH |
886 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
887 | struct sk_buff *); | |
00e90712 | 888 | struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t); |
248f219c | 889 | void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *); |
001c1122 | 890 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
7877a4a4 | 891 | |
17926a79 | 892 | /* |
0d81a51a | 893 | * input.c |
17926a79 | 894 | */ |
0d81a51a | 895 | void rxrpc_data_ready(struct sock *); |
17926a79 DH |
896 | |
897 | /* | |
0d81a51a | 898 | * insecure.c |
17926a79 | 899 | */ |
0d81a51a | 900 | extern const struct rxrpc_security rxrpc_no_security; |
17926a79 DH |
901 | |
902 | /* | |
0d81a51a | 903 | * key.c |
17926a79 | 904 | */ |
0d81a51a DH |
905 | extern struct key_type key_type_rxrpc; |
906 | extern struct key_type key_type_rxrpc_s; | |
907 | ||
908 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); | |
909 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
910 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, | |
911 | u32); | |
17926a79 | 912 | |
87563616 DH |
913 | /* |
914 | * local_event.c | |
915 | */ | |
4f95dd78 | 916 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
87563616 | 917 | |
17926a79 | 918 | /* |
0d81a51a | 919 | * local_object.c |
17926a79 | 920 | */ |
4f95dd78 DH |
921 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
922 | void __rxrpc_put_local(struct rxrpc_local *); | |
c1b1203d | 923 | void __exit rxrpc_destroy_all_locals(void); |
17926a79 | 924 | |
4f95dd78 DH |
925 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
926 | { | |
927 | atomic_inc(&local->usage); | |
928 | } | |
929 | ||
930 | static inline | |
931 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) | |
932 | { | |
933 | return atomic_inc_not_zero(&local->usage) ? local : NULL; | |
934 | } | |
935 | ||
936 | static inline void rxrpc_put_local(struct rxrpc_local *local) | |
937 | { | |
5627cc8b | 938 | if (local && atomic_dec_and_test(&local->usage)) |
4f95dd78 DH |
939 | __rxrpc_put_local(local); |
940 | } | |
941 | ||
5acbee46 DH |
942 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
943 | { | |
944 | rxrpc_queue_work(&local->processor); | |
945 | } | |
946 | ||
17926a79 | 947 | /* |
0d81a51a | 948 | * misc.c |
17926a79 | 949 | */ |
0d81a51a DH |
950 | extern unsigned int rxrpc_max_backlog __read_mostly; |
951 | extern unsigned int rxrpc_requested_ack_delay; | |
952 | extern unsigned int rxrpc_soft_ack_delay; | |
953 | extern unsigned int rxrpc_idle_ack_delay; | |
954 | extern unsigned int rxrpc_rx_window_size; | |
955 | extern unsigned int rxrpc_rx_mtu; | |
956 | extern unsigned int rxrpc_rx_jumbo_max; | |
0b58b8a1 | 957 | extern unsigned int rxrpc_resend_timeout; |
17926a79 | 958 | |
0d81a51a DH |
959 | extern const s8 rxrpc_ack_priority[]; |
960 | ||
17926a79 | 961 | /* |
0d81a51a | 962 | * output.c |
17926a79 | 963 | */ |
8d94aa38 | 964 | int rxrpc_send_call_packet(struct rxrpc_call *, u8); |
5a924b89 | 965 | int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *); |
248f219c | 966 | void rxrpc_reject_packets(struct rxrpc_local *); |
17926a79 DH |
967 | |
968 | /* | |
abe89ef0 | 969 | * peer_event.c |
0d81a51a | 970 | */ |
abe89ef0 | 971 | void rxrpc_error_report(struct sock *); |
f66d7490 | 972 | void rxrpc_peer_error_distributor(struct work_struct *); |
cf1a6474 DH |
973 | void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, |
974 | rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); | |
0d81a51a DH |
975 | |
976 | /* | |
977 | * peer_object.c | |
17926a79 | 978 | */ |
be6e6707 DH |
979 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
980 | const struct sockaddr_rxrpc *); | |
981 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, | |
982 | struct sockaddr_rxrpc *, gfp_t); | |
983 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); | |
248f219c DH |
984 | struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, |
985 | struct rxrpc_peer *); | |
be6e6707 | 986 | |
df5d8bf7 | 987 | static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
be6e6707 DH |
988 | { |
989 | atomic_inc(&peer->usage); | |
df5d8bf7 | 990 | return peer; |
be6e6707 DH |
991 | } |
992 | ||
993 | static inline | |
994 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) | |
995 | { | |
996 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; | |
997 | } | |
998 | ||
999 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); | |
1000 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) | |
1001 | { | |
5627cc8b | 1002 | if (peer && atomic_dec_and_test(&peer->usage)) |
be6e6707 DH |
1003 | __rxrpc_put_peer(peer); |
1004 | } | |
17926a79 DH |
1005 | |
1006 | /* | |
0d81a51a | 1007 | * proc.c |
17926a79 | 1008 | */ |
036c2e27 JE |
1009 | extern const struct file_operations rxrpc_call_seq_fops; |
1010 | extern const struct file_operations rxrpc_connection_seq_fops; | |
17926a79 DH |
1011 | |
1012 | /* | |
0d81a51a | 1013 | * recvmsg.c |
17926a79 | 1014 | */ |
248f219c | 1015 | void rxrpc_notify_socket(struct rxrpc_call *); |
1b784140 | 1016 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
17926a79 DH |
1017 | |
1018 | /* | |
0d81a51a DH |
1019 | * rxkad.c |
1020 | */ | |
1021 | #ifdef CONFIG_RXKAD | |
1022 | extern const struct rxrpc_security rxkad; | |
1023 | #endif | |
1024 | ||
1025 | /* | |
1026 | * security.c | |
17926a79 | 1027 | */ |
648af7fc DH |
1028 | int __init rxrpc_init_security(void); |
1029 | void rxrpc_exit_security(void); | |
c1b1203d JP |
1030 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
1031 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); | |
71a17de3 | 1032 | |
0b58b8a1 DH |
1033 | /* |
1034 | * sendmsg.c | |
1035 | */ | |
1036 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); | |
17926a79 DH |
1037 | |
1038 | /* | |
0d81a51a | 1039 | * skbuff.c |
17926a79 | 1040 | */ |
d001648e | 1041 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
c1b1203d | 1042 | void rxrpc_packet_destructor(struct sk_buff *); |
71f3ca40 DH |
1043 | void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); |
1044 | void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
1045 | void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
1046 | void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
1047 | void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
df844fd4 | 1048 | void rxrpc_purge_queue(struct sk_buff_head *); |
17926a79 | 1049 | |
5873c083 DH |
1050 | /* |
1051 | * sysctl.c | |
1052 | */ | |
1053 | #ifdef CONFIG_SYSCTL | |
1054 | extern int __init rxrpc_sysctl_init(void); | |
1055 | extern void rxrpc_sysctl_exit(void); | |
1056 | #else | |
1057 | static inline int __init rxrpc_sysctl_init(void) { return 0; } | |
1058 | static inline void rxrpc_sysctl_exit(void) {} | |
1059 | #endif | |
1060 | ||
be6e6707 DH |
1061 | /* |
1062 | * utils.c | |
1063 | */ | |
d991b4a3 | 1064 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
be6e6707 | 1065 | |
248f219c DH |
1066 | static inline bool before(u32 seq1, u32 seq2) |
1067 | { | |
1068 | return (s32)(seq1 - seq2) < 0; | |
1069 | } | |
1070 | static inline bool before_eq(u32 seq1, u32 seq2) | |
1071 | { | |
1072 | return (s32)(seq1 - seq2) <= 0; | |
1073 | } | |
1074 | static inline bool after(u32 seq1, u32 seq2) | |
1075 | { | |
1076 | return (s32)(seq1 - seq2) > 0; | |
1077 | } | |
1078 | static inline bool after_eq(u32 seq1, u32 seq2) | |
1079 | { | |
1080 | return (s32)(seq1 - seq2) >= 0; | |
1081 | } | |
1082 | ||
17926a79 DH |
1083 | /* |
1084 | * debug tracing | |
1085 | */ | |
95c96174 | 1086 | extern unsigned int rxrpc_debug; |
17926a79 DH |
1087 | |
1088 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 1089 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 1090 | |
0dc47877 HH |
1091 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1092 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 DH |
1093 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1094 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
1095 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
1096 | ||
1097 | ||
1098 | #if defined(__KDEBUG) | |
1099 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1100 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1101 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1102 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
1103 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
1104 | ||
1105 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
1106 | #define RXRPC_DEBUG_KENTER 0x01 | |
1107 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
1108 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
1109 | #define RXRPC_DEBUG_KPROTO 0x08 | |
1110 | #define RXRPC_DEBUG_KNET 0x10 | |
1111 | ||
1112 | #define _enter(FMT,...) \ | |
1113 | do { \ | |
1114 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
1115 | kenter(FMT,##__VA_ARGS__); \ | |
1116 | } while (0) | |
1117 | ||
1118 | #define _leave(FMT,...) \ | |
1119 | do { \ | |
1120 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
1121 | kleave(FMT,##__VA_ARGS__); \ | |
1122 | } while (0) | |
1123 | ||
1124 | #define _debug(FMT,...) \ | |
1125 | do { \ | |
1126 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
1127 | kdebug(FMT,##__VA_ARGS__); \ | |
1128 | } while (0) | |
1129 | ||
1130 | #define _proto(FMT,...) \ | |
1131 | do { \ | |
1132 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
1133 | kproto(FMT,##__VA_ARGS__); \ | |
1134 | } while (0) | |
1135 | ||
1136 | #define _net(FMT,...) \ | |
1137 | do { \ | |
1138 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
1139 | knet(FMT,##__VA_ARGS__); \ | |
1140 | } while (0) | |
1141 | ||
1142 | #else | |
12fdff3f DH |
1143 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1144 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1145 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
1146 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) | |
1147 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) | |
17926a79 DH |
1148 | #endif |
1149 | ||
1150 | /* | |
1151 | * debug assertion checking | |
1152 | */ | |
1153 | #if 1 // defined(__KDEBUGALL) | |
1154 | ||
1155 | #define ASSERT(X) \ | |
1156 | do { \ | |
1157 | if (unlikely(!(X))) { \ | |
9b6d5398 | 1158 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1159 | BUG(); \ |
1160 | } \ | |
b4f1342f | 1161 | } while (0) |
17926a79 DH |
1162 | |
1163 | #define ASSERTCMP(X, OP, Y) \ | |
1164 | do { \ | |
cf13258f DH |
1165 | __typeof__(X) _x = (X); \ |
1166 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 | 1167 | if (unlikely(!(_x OP _y))) { \ |
cf13258f DH |
1168 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
1169 | (unsigned long)_x, (unsigned long)_x, #OP, \ | |
1170 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1171 | BUG(); \ |
1172 | } \ | |
b4f1342f | 1173 | } while (0) |
17926a79 DH |
1174 | |
1175 | #define ASSERTIF(C, X) \ | |
1176 | do { \ | |
1177 | if (unlikely((C) && !(X))) { \ | |
9b6d5398 | 1178 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1179 | BUG(); \ |
1180 | } \ | |
b4f1342f | 1181 | } while (0) |
17926a79 DH |
1182 | |
1183 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1184 | do { \ | |
cf13258f DH |
1185 | __typeof__(X) _x = (X); \ |
1186 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 JP |
1187 | if (unlikely((C) && !(_x OP _y))) { \ |
1188 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
cf13258f DH |
1189 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
1190 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1191 | BUG(); \ |
1192 | } \ | |
b4f1342f | 1193 | } while (0) |
17926a79 DH |
1194 | |
1195 | #else | |
1196 | ||
1197 | #define ASSERT(X) \ | |
1198 | do { \ | |
b4f1342f | 1199 | } while (0) |
17926a79 DH |
1200 | |
1201 | #define ASSERTCMP(X, OP, Y) \ | |
1202 | do { \ | |
b4f1342f | 1203 | } while (0) |
17926a79 DH |
1204 | |
1205 | #define ASSERTIF(C, X) \ | |
1206 | do { \ | |
b4f1342f | 1207 | } while (0) |
17926a79 DH |
1208 | |
1209 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1210 | do { \ | |
b4f1342f | 1211 | } while (0) |
17926a79 DH |
1212 | |
1213 | #endif /* __KDEBUGALL */ |