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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 */ | |
210f0353 | 63 | RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ |
17926a79 DH |
64 | RXRPC_CLOSE, /* socket is being closed */ |
65 | }; | |
66 | ||
00e90712 DH |
67 | /* |
68 | * Service backlog preallocation. | |
69 | * | |
70 | * This contains circular buffers of preallocated peers, connections and calls | |
71 | * for incoming service calls and their head and tail pointers. This allows | |
72 | * calls to be set up in the data_ready handler, thereby avoiding the need to | |
73 | * shuffle packets around so much. | |
74 | */ | |
75 | struct rxrpc_backlog { | |
76 | unsigned short peer_backlog_head; | |
77 | unsigned short peer_backlog_tail; | |
78 | unsigned short conn_backlog_head; | |
79 | unsigned short conn_backlog_tail; | |
80 | unsigned short call_backlog_head; | |
81 | unsigned short call_backlog_tail; | |
82 | #define RXRPC_BACKLOG_MAX 32 | |
83 | struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; | |
84 | struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; | |
85 | struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; | |
86 | }; | |
87 | ||
17926a79 DH |
88 | /* |
89 | * RxRPC socket definition | |
90 | */ | |
91 | struct rxrpc_sock { | |
92 | /* WARNING: sk has to be the first member */ | |
93 | struct sock sk; | |
d001648e | 94 | rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
00e90712 | 95 | rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ |
17926a79 | 96 | struct rxrpc_local *local; /* local endpoint */ |
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 | 144 | union { |
50235c4b | 145 | u8 nr_jumbo; /* Number of jumbo subpackets */ |
248f219c | 146 | }; |
17926a79 | 147 | union { |
17926a79 | 148 | int remain; /* amount of space remaining for next write */ |
17926a79 DH |
149 | }; |
150 | ||
0d12f8a4 | 151 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
17926a79 DH |
152 | }; |
153 | ||
154 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) | |
155 | ||
17926a79 DH |
156 | /* |
157 | * RxRPC security module interface | |
158 | */ | |
159 | struct rxrpc_security { | |
17926a79 DH |
160 | const char *name; /* name of this service */ |
161 | u8 security_index; /* security type provided */ | |
162 | ||
648af7fc DH |
163 | /* Initialise a security service */ |
164 | int (*init)(void); | |
165 | ||
166 | /* Clean up a security service */ | |
167 | void (*exit)(void); | |
168 | ||
17926a79 DH |
169 | /* initialise a connection's security */ |
170 | int (*init_connection_security)(struct rxrpc_connection *); | |
171 | ||
172 | /* prime a connection's packet security */ | |
a263629d | 173 | int (*prime_packet_security)(struct rxrpc_connection *); |
17926a79 DH |
174 | |
175 | /* impose security on a packet */ | |
a263629d | 176 | int (*secure_packet)(struct rxrpc_call *, |
17926a79 DH |
177 | struct sk_buff *, |
178 | size_t, | |
179 | void *); | |
180 | ||
181 | /* verify the security on a received packet */ | |
5a42976d | 182 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, |
248f219c DH |
183 | unsigned int, unsigned int, rxrpc_seq_t, u16); |
184 | ||
185 | /* Locate the data in a received packet that has been verified. */ | |
186 | void (*locate_data)(struct rxrpc_call *, struct sk_buff *, | |
187 | unsigned int *, unsigned int *); | |
17926a79 DH |
188 | |
189 | /* issue a challenge */ | |
190 | int (*issue_challenge)(struct rxrpc_connection *); | |
191 | ||
192 | /* respond to a challenge */ | |
193 | int (*respond_to_challenge)(struct rxrpc_connection *, | |
194 | struct sk_buff *, | |
195 | u32 *); | |
196 | ||
197 | /* verify a response */ | |
198 | int (*verify_response)(struct rxrpc_connection *, | |
199 | struct sk_buff *, | |
200 | u32 *); | |
201 | ||
202 | /* clear connection security */ | |
203 | void (*clear)(struct rxrpc_connection *); | |
204 | }; | |
205 | ||
206 | /* | |
4f95dd78 DH |
207 | * RxRPC local transport endpoint description |
208 | * - owned by a single AF_RXRPC socket | |
209 | * - pointed to by transport socket struct sk_user_data | |
17926a79 DH |
210 | */ |
211 | struct rxrpc_local { | |
4f95dd78 DH |
212 | struct rcu_head rcu; |
213 | atomic_t usage; | |
214 | struct list_head link; | |
17926a79 | 215 | struct socket *socket; /* my UDP socket */ |
4f95dd78 | 216 | struct work_struct processor; |
1e9e5c95 | 217 | struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ |
17926a79 | 218 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
17926a79 | 219 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ |
44ba0698 | 220 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
999b69f8 DH |
221 | struct rb_root client_conns; /* Client connections by socket params */ |
222 | spinlock_t client_conns_lock; /* Lock for client_conns */ | |
17926a79 DH |
223 | spinlock_t lock; /* access lock */ |
224 | rwlock_t services_lock; /* lock for services list */ | |
17926a79 | 225 | int debug_id; /* debug ID for printks */ |
4f95dd78 | 226 | bool dead; |
17926a79 DH |
227 | struct sockaddr_rxrpc srx; /* local address */ |
228 | }; | |
229 | ||
230 | /* | |
231 | * RxRPC remote transport endpoint definition | |
be6e6707 | 232 | * - matched by local endpoint, remote port, address and protocol type |
17926a79 DH |
233 | */ |
234 | struct rxrpc_peer { | |
be6e6707 DH |
235 | struct rcu_head rcu; /* This must be first */ |
236 | atomic_t usage; | |
237 | unsigned long hash_key; | |
238 | struct hlist_node hash_link; | |
239 | struct rxrpc_local *local; | |
f66d7490 DH |
240 | struct hlist_head error_targets; /* targets for net error distribution */ |
241 | struct work_struct error_distributor; | |
aa390bbe | 242 | struct rb_root service_conns; /* Service connections */ |
8496af50 | 243 | seqlock_t service_conn_lock; |
17926a79 | 244 | spinlock_t lock; /* access lock */ |
95c96174 ED |
245 | unsigned int if_mtu; /* interface MTU for this peer */ |
246 | unsigned int mtu; /* network MTU for this peer */ | |
247 | unsigned int maxdata; /* data size (MTU - hdrsize) */ | |
17926a79 DH |
248 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
249 | int debug_id; /* debug ID for printks */ | |
f66d7490 DH |
250 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
251 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 | |
17926a79 DH |
252 | struct sockaddr_rxrpc srx; /* remote address */ |
253 | ||
254 | /* calculated RTT cache */ | |
255 | #define RXRPC_RTT_CACHE_SIZE 32 | |
0d4b103c | 256 | ktime_t rtt_last_req; /* Time of last RTT request */ |
cf1a6474 DH |
257 | u64 rtt; /* Current RTT estimate (in nS) */ |
258 | u64 rtt_sum; /* Sum of cache contents */ | |
259 | u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ | |
260 | u8 rtt_cursor; /* next entry at which to insert */ | |
261 | u8 rtt_usage; /* amount of cache actually used */ | |
17926a79 DH |
262 | }; |
263 | ||
19ffa01c DH |
264 | /* |
265 | * Keys for matching a connection. | |
266 | */ | |
267 | struct rxrpc_conn_proto { | |
e8d70ce1 DH |
268 | union { |
269 | struct { | |
270 | u32 epoch; /* epoch of this connection */ | |
271 | u32 cid; /* connection ID */ | |
272 | }; | |
273 | u64 index_key; | |
19ffa01c DH |
274 | }; |
275 | }; | |
276 | ||
277 | struct rxrpc_conn_parameters { | |
278 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
279 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
280 | struct key *key; /* Security details */ | |
281 | bool exclusive; /* T if conn is exclusive */ | |
282 | u16 service_id; /* Service ID for this connection */ | |
283 | u32 security_level; /* Security level selected */ | |
284 | }; | |
285 | ||
bba304db DH |
286 | /* |
287 | * Bits in the connection flags. | |
288 | */ | |
289 | enum rxrpc_conn_flag { | |
290 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ | |
001c1122 DH |
291 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
292 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ | |
45025bce DH |
293 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
294 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ | |
295 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ | |
bba304db DH |
296 | }; |
297 | ||
298 | /* | |
299 | * Events that can be raised upon a connection. | |
300 | */ | |
301 | enum rxrpc_conn_event { | |
302 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ | |
303 | }; | |
304 | ||
45025bce DH |
305 | /* |
306 | * The connection cache state. | |
307 | */ | |
308 | enum rxrpc_conn_cache_state { | |
309 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ | |
310 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ | |
311 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ | |
312 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ | |
313 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ | |
363deeab | 314 | RXRPC_CONN__NR_CACHE_STATES |
45025bce DH |
315 | }; |
316 | ||
bba304db DH |
317 | /* |
318 | * The connection protocol state. | |
319 | */ | |
320 | enum rxrpc_conn_proto_state { | |
321 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ | |
322 | RXRPC_CONN_CLIENT, /* Client connection */ | |
00e90712 | 323 | RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ |
bba304db DH |
324 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
325 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ | |
326 | RXRPC_CONN_SERVICE, /* Service secured connection */ | |
327 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ | |
328 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ | |
bba304db DH |
329 | RXRPC_CONN__NR_STATES |
330 | }; | |
331 | ||
17926a79 DH |
332 | /* |
333 | * RxRPC connection definition | |
aa390bbe | 334 | * - matched by { local, peer, epoch, conn_id, direction } |
17926a79 DH |
335 | * - each connection can only handle four simultaneous calls |
336 | */ | |
337 | struct rxrpc_connection { | |
19ffa01c DH |
338 | struct rxrpc_conn_proto proto; |
339 | struct rxrpc_conn_parameters params; | |
340 | ||
45025bce DH |
341 | atomic_t usage; |
342 | struct rcu_head rcu; | |
343 | struct list_head cache_link; | |
a1399f8b | 344 | |
45025bce DH |
345 | spinlock_t channel_lock; |
346 | unsigned char active_chans; /* Mask of active channels */ | |
347 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) | |
348 | struct list_head waiting_calls; /* Calls waiting for channels */ | |
a1399f8b DH |
349 | struct rxrpc_channel { |
350 | struct rxrpc_call __rcu *call; /* Active call */ | |
351 | u32 call_id; /* ID of current call */ | |
352 | u32 call_counter; /* Call ID counter */ | |
353 | u32 last_call; /* ID of last call */ | |
18bfeba5 DH |
354 | u8 last_type; /* Type of last packet */ |
355 | u16 last_service_id; | |
356 | union { | |
357 | u32 last_seq; | |
358 | u32 last_abort; | |
359 | }; | |
a1399f8b | 360 | } channels[RXRPC_MAXCALLS]; |
999b69f8 | 361 | |
17926a79 | 362 | struct work_struct processor; /* connection event processor */ |
999b69f8 DH |
363 | union { |
364 | struct rb_node client_node; /* Node in local->client_conns */ | |
aa390bbe | 365 | struct rb_node service_node; /* Node in peer->service_conns */ |
999b69f8 | 366 | }; |
4d028b2c | 367 | struct list_head proc_link; /* link in procfs list */ |
17926a79 | 368 | struct list_head link; /* link in master connection list */ |
17926a79 | 369 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
648af7fc | 370 | const struct rxrpc_security *security; /* applied security module */ |
17926a79 | 371 | struct key *server_key; /* security for this service */ |
1afe593b | 372 | struct crypto_skcipher *cipher; /* encryption handle */ |
17926a79 | 373 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
4a3388c8 | 374 | unsigned long flags; |
17926a79 | 375 | unsigned long events; |
f51b4480 | 376 | unsigned long idle_timestamp; /* Time at which last became idle */ |
17926a79 | 377 | spinlock_t state_lock; /* state-change lock */ |
cf13258f DH |
378 | enum rxrpc_conn_cache_state cache_state; |
379 | enum rxrpc_conn_proto_state state; /* current state of connection */ | |
dc44b3a0 DH |
380 | u32 local_abort; /* local abort code */ |
381 | u32 remote_abort; /* remote abort code */ | |
17926a79 | 382 | int debug_id; /* debug ID for printks */ |
17926a79 | 383 | atomic_t serial; /* packet serial number counter */ |
563ea7d5 | 384 | unsigned int hi_serial; /* highest serial number received */ |
5a924b89 | 385 | u32 security_nonce; /* response re-use preventer */ |
17926a79 | 386 | u8 size_align; /* data size alignment (for security) */ |
17926a79 | 387 | u8 security_size; /* security header size */ |
17926a79 | 388 | u8 security_ix; /* security type */ |
17926a79 DH |
389 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
390 | }; | |
391 | ||
5b8848d1 DH |
392 | /* |
393 | * Flags in call->flags. | |
394 | */ | |
395 | enum rxrpc_call_flag { | |
396 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ | |
5b8848d1 | 397 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
dabe5a79 | 398 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
45025bce | 399 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
248f219c DH |
400 | RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ |
401 | RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ | |
a5af7e1f | 402 | RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ |
8e83134d | 403 | RXRPC_CALL_PINGING, /* Ping in process */ |
57494343 | 404 | RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ |
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 */ |
a5af7e1f | 415 | RXRPC_CALL_EV_PING, /* Ping send 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 | ||
57494343 DH |
450 | /* |
451 | * Call Tx congestion management modes. | |
452 | */ | |
453 | enum rxrpc_congest_mode { | |
454 | RXRPC_CALL_SLOW_START, | |
455 | RXRPC_CALL_CONGEST_AVOIDANCE, | |
456 | RXRPC_CALL_PACKET_LOSS, | |
457 | RXRPC_CALL_FAST_RETRANSMIT, | |
458 | NR__RXRPC_CONGEST_MODES | |
459 | }; | |
460 | ||
17926a79 DH |
461 | /* |
462 | * RxRPC call definition | |
463 | * - matched by { connection, call_id } | |
464 | */ | |
465 | struct rxrpc_call { | |
dee46364 | 466 | struct rcu_head rcu; |
17926a79 | 467 | struct rxrpc_connection *conn; /* connection carrying call */ |
df5d8bf7 | 468 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
8d94aa38 | 469 | struct rxrpc_sock __rcu *socket; /* socket responsible */ |
df0adc78 DH |
470 | ktime_t ack_at; /* When deferred ACK needs to happen */ |
471 | ktime_t resend_at; /* When next resend needs to happen */ | |
a5af7e1f | 472 | ktime_t ping_at; /* When next to send a ping */ |
df0adc78 | 473 | ktime_t expire_at; /* When the call times out */ |
248f219c DH |
474 | struct timer_list timer; /* Combined event timer */ |
475 | struct work_struct processor; /* Event processor */ | |
d001648e | 476 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
17926a79 | 477 | struct list_head link; /* link in master call list */ |
45025bce | 478 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
f66d7490 | 479 | struct hlist_node error_link; /* link in error distribution list */ |
248f219c DH |
480 | struct list_head accept_link; /* Link in rx->acceptq */ |
481 | struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ | |
482 | struct list_head sock_link; /* Link in rx->sock_calls */ | |
483 | struct rb_node sock_node; /* Node in rx->calls */ | |
17926a79 | 484 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
45025bce | 485 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
a263629d | 486 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
17926a79 | 487 | unsigned long user_call_ID; /* user-defined call ID */ |
17926a79 | 488 | unsigned long flags; |
17926a79 | 489 | unsigned long events; |
17926a79 DH |
490 | spinlock_t lock; |
491 | rwlock_t state_lock; /* lock for state transition */ | |
f5c17aae DH |
492 | u32 abort_code; /* Local/remote abort code */ |
493 | int error; /* Local error incurred */ | |
cf13258f DH |
494 | enum rxrpc_call_state state; /* current state of call */ |
495 | enum rxrpc_call_completion completion; /* Call completion condition */ | |
17926a79 | 496 | atomic_t usage; |
dabe5a79 | 497 | u16 service_id; /* service ID */ |
278ac0cd | 498 | u8 security_ix; /* Security type */ |
dabe5a79 DH |
499 | u32 call_id; /* call ID on connection */ |
500 | u32 cid; /* connection ID plus channel index */ | |
501 | int debug_id; /* debug ID for printks */ | |
8e83134d DH |
502 | unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ |
503 | unsigned short rx_pkt_len; /* Current recvmsg packet len */ | |
17926a79 | 504 | |
248f219c DH |
505 | /* Rx/Tx circular buffer, depending on phase. |
506 | * | |
507 | * In the Rx phase, packets are annotated with 0 or the number of the | |
508 | * segment of a jumbo packet each buffer refers to. There can be up to | |
509 | * 47 segments in a maximum-size UDP packet. | |
510 | * | |
511 | * In the Tx phase, packets are annotated with which buffers have been | |
512 | * acked. | |
513 | */ | |
514 | #define RXRPC_RXTX_BUFF_SIZE 64 | |
515 | #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) | |
75e42126 | 516 | #define RXRPC_INIT_RX_WINDOW_SIZE 32 |
248f219c DH |
517 | struct sk_buff **rxtx_buffer; |
518 | u8 *rxtx_annotations; | |
519 | #define RXRPC_TX_ANNO_ACK 0 | |
520 | #define RXRPC_TX_ANNO_UNACK 1 | |
521 | #define RXRPC_TX_ANNO_NAK 2 | |
522 | #define RXRPC_TX_ANNO_RETRANS 3 | |
f07373ea | 523 | #define RXRPC_TX_ANNO_MASK 0x03 |
70790dbe DH |
524 | #define RXRPC_TX_ANNO_LAST 0x04 |
525 | #define RXRPC_TX_ANNO_RESENT 0x08 | |
526 | ||
248f219c DH |
527 | #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ |
528 | #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ | |
529 | #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ | |
530 | rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but | |
531 | * not hard-ACK'd packet follows this. | |
532 | */ | |
533 | rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ | |
57494343 DH |
534 | |
535 | /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS | |
536 | * is fixed, we keep these numbers in terms of segments (ie. DATA | |
537 | * packets) rather than bytes. | |
538 | */ | |
539 | #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN | |
540 | u8 cong_cwnd; /* Congestion window size */ | |
541 | u8 cong_extra; /* Extra to send for congestion management */ | |
542 | u8 cong_ssthresh; /* Slow-start threshold */ | |
543 | enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ | |
544 | u8 cong_dup_acks; /* Count of ACKs showing missing packets */ | |
545 | u8 cong_cumul_acks; /* Cumulative ACK count */ | |
546 | ktime_t cong_tstamp; /* Last time cwnd was changed */ | |
547 | ||
248f219c DH |
548 | rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not |
549 | * consumed packet follows this. | |
17926a79 | 550 | */ |
248f219c DH |
551 | rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ |
552 | rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ | |
553 | u8 rx_winsize; /* Size of Rx window */ | |
554 | u8 tx_winsize; /* Maximum size of Tx window */ | |
71f3ca40 | 555 | bool tx_phase; /* T if transmission phase, F if receive phase */ |
75e42126 | 556 | u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ |
17926a79 DH |
557 | |
558 | /* receive-phase ACK management */ | |
4e36a95e | 559 | u8 ackr_reason; /* reason to ACK */ |
563ea7d5 | 560 | u16 ackr_skew; /* skew on packet being ACK'd */ |
0d12f8a4 | 561 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
248f219c | 562 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
805b21b9 DH |
563 | rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ |
564 | rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ | |
a5af7e1f DH |
565 | |
566 | /* ping management */ | |
567 | rxrpc_serial_t ping_serial; /* Last ping sent */ | |
568 | ktime_t ping_time; /* Time last ping sent */ | |
17926a79 | 569 | |
248f219c | 570 | /* transmission-phase ACK management */ |
57494343 | 571 | ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ |
248f219c | 572 | rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ |
31a1b989 DH |
573 | rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ |
574 | }; | |
575 | ||
576 | /* | |
57494343 | 577 | * Summary of a new ACK and the changes it made to the Tx buffer packet states. |
31a1b989 DH |
578 | */ |
579 | struct rxrpc_ack_summary { | |
580 | u8 ack_reason; | |
581 | u8 nr_acks; /* Number of ACKs in packet */ | |
582 | u8 nr_nacks; /* Number of NACKs in packet */ | |
583 | u8 nr_new_acks; /* Number of new ACKs in packet */ | |
584 | u8 nr_new_nacks; /* Number of new NACKs in packet */ | |
585 | u8 nr_rot_new_acks; /* Number of rotated new ACKs */ | |
586 | bool new_low_nack; /* T if new low NACK found */ | |
57494343 DH |
587 | bool retrans_timeo; /* T if reTx due to timeout happened */ |
588 | u8 flight_size; /* Number of unreceived transmissions */ | |
589 | /* Place to stash values for tracing */ | |
590 | enum rxrpc_congest_mode mode:8; | |
591 | u8 cwnd; | |
592 | u8 ssthresh; | |
593 | u8 dup_acks; | |
594 | u8 cumulative_acks; | |
17926a79 DH |
595 | }; |
596 | ||
df844fd4 DH |
597 | #include <trace/events/rxrpc.h> |
598 | ||
17926a79 | 599 | /* |
651350d1 | 600 | * af_rxrpc.c |
17926a79 | 601 | */ |
71f3ca40 | 602 | extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; |
0d12f8a4 | 603 | extern u32 rxrpc_epoch; |
651350d1 DH |
604 | extern atomic_t rxrpc_debug_id; |
605 | extern struct workqueue_struct *rxrpc_workqueue; | |
17926a79 DH |
606 | |
607 | /* | |
0d81a51a | 608 | * call_accept.c |
17926a79 | 609 | */ |
00e90712 DH |
610 | int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); |
611 | void rxrpc_discard_prealloc(struct rxrpc_sock *); | |
248f219c DH |
612 | struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, |
613 | struct rxrpc_connection *, | |
614 | struct sk_buff *); | |
4f95dd78 | 615 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
d001648e DH |
616 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
617 | rxrpc_notify_rx_t); | |
c1b1203d | 618 | int rxrpc_reject_call(struct rxrpc_sock *); |
17926a79 DH |
619 | |
620 | /* | |
0d81a51a | 621 | * call_event.c |
17926a79 | 622 | */ |
9749fd2b | 623 | void __rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t); |
df0adc78 | 624 | void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t); |
9c7ad434 DH |
625 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, |
626 | enum rxrpc_propose_ack_trace); | |
c1b1203d | 627 | void rxrpc_process_call(struct work_struct *); |
17926a79 DH |
628 | |
629 | /* | |
0d81a51a | 630 | * call_object.c |
17926a79 | 631 | */ |
f5c17aae DH |
632 | extern const char *const rxrpc_call_states[]; |
633 | extern const char *const rxrpc_call_completions[]; | |
dad8aff7 | 634 | extern unsigned int rxrpc_max_call_lifetime; |
17926a79 DH |
635 | extern struct kmem_cache *rxrpc_call_jar; |
636 | extern struct list_head rxrpc_calls; | |
637 | extern rwlock_t rxrpc_call_lock; | |
638 | ||
2341e077 | 639 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
00e90712 | 640 | struct rxrpc_call *rxrpc_alloc_call(gfp_t); |
2341e077 | 641 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
19ffa01c | 642 | struct rxrpc_conn_parameters *, |
999b69f8 | 643 | struct sockaddr_rxrpc *, |
2341e077 | 644 | unsigned long, gfp_t); |
248f219c DH |
645 | void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, |
646 | struct sk_buff *); | |
8d94aa38 | 647 | void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); |
c1b1203d | 648 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
8d94aa38 DH |
649 | bool __rxrpc_queue_call(struct rxrpc_call *); |
650 | bool rxrpc_queue_call(struct rxrpc_call *); | |
e34d4234 | 651 | void rxrpc_see_call(struct rxrpc_call *); |
fff72429 DH |
652 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
653 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); | |
00e90712 | 654 | void rxrpc_cleanup_call(struct rxrpc_call *); |
c1b1203d | 655 | void __exit rxrpc_destroy_all_calls(void); |
17926a79 | 656 | |
dabe5a79 DH |
657 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
658 | { | |
659 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); | |
660 | } | |
661 | ||
662 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) | |
663 | { | |
664 | return !rxrpc_is_service_call(call); | |
665 | } | |
666 | ||
f5c17aae DH |
667 | /* |
668 | * Transition a call to the complete state. | |
669 | */ | |
670 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, | |
671 | enum rxrpc_call_completion compl, | |
672 | u32 abort_code, | |
673 | int error) | |
674 | { | |
675 | if (call->state < RXRPC_CALL_COMPLETE) { | |
676 | call->abort_code = abort_code; | |
677 | call->error = error; | |
678 | call->completion = compl, | |
679 | call->state = RXRPC_CALL_COMPLETE; | |
c0d058c2 | 680 | wake_up(&call->waitq); |
f5c17aae DH |
681 | return true; |
682 | } | |
683 | return false; | |
684 | } | |
685 | ||
686 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, | |
687 | enum rxrpc_call_completion compl, | |
688 | u32 abort_code, | |
689 | int error) | |
690 | { | |
e8d6bbb0 | 691 | bool ret; |
f5c17aae DH |
692 | |
693 | write_lock_bh(&call->state_lock); | |
694 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); | |
695 | write_unlock_bh(&call->state_lock); | |
696 | return ret; | |
697 | } | |
698 | ||
699 | /* | |
700 | * Record that a call successfully completed. | |
701 | */ | |
e8d6bbb0 | 702 | static inline bool __rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 703 | { |
e8d6bbb0 | 704 | return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
f5c17aae DH |
705 | } |
706 | ||
e8d6bbb0 | 707 | static inline bool rxrpc_call_completed(struct rxrpc_call *call) |
f5c17aae | 708 | { |
e8d6bbb0 DH |
709 | bool ret; |
710 | ||
f5c17aae | 711 | write_lock_bh(&call->state_lock); |
e8d6bbb0 | 712 | ret = __rxrpc_call_completed(call); |
f5c17aae | 713 | write_unlock_bh(&call->state_lock); |
e8d6bbb0 | 714 | return ret; |
f5c17aae DH |
715 | } |
716 | ||
717 | /* | |
718 | * Record that a call is locally aborted. | |
719 | */ | |
5a42976d DH |
720 | static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
721 | rxrpc_seq_t seq, | |
f5c17aae DH |
722 | u32 abort_code, int error) |
723 | { | |
5a42976d DH |
724 | trace_rxrpc_abort(why, call->cid, call->call_id, seq, |
725 | abort_code, error); | |
248f219c DH |
726 | return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, |
727 | abort_code, error); | |
f5c17aae DH |
728 | } |
729 | ||
5a42976d DH |
730 | static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
731 | rxrpc_seq_t seq, u32 abort_code, int error) | |
f5c17aae DH |
732 | { |
733 | bool ret; | |
734 | ||
735 | write_lock_bh(&call->state_lock); | |
5a42976d | 736 | ret = __rxrpc_abort_call(why, call, seq, abort_code, error); |
f5c17aae DH |
737 | write_unlock_bh(&call->state_lock); |
738 | return ret; | |
739 | } | |
740 | ||
4a3388c8 DH |
741 | /* |
742 | * conn_client.c | |
743 | */ | |
45025bce DH |
744 | extern unsigned int rxrpc_max_client_connections; |
745 | extern unsigned int rxrpc_reap_client_connections; | |
746 | extern unsigned int rxrpc_conn_idle_client_expiry; | |
747 | extern unsigned int rxrpc_conn_idle_client_fast_expiry; | |
4a3388c8 DH |
748 | extern struct idr rxrpc_client_conn_ids; |
749 | ||
eb9b9d22 | 750 | void rxrpc_destroy_client_conn_ids(void); |
c6d2b8d7 DH |
751 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
752 | struct sockaddr_rxrpc *, gfp_t); | |
45025bce DH |
753 | void rxrpc_expose_client_call(struct rxrpc_call *); |
754 | void rxrpc_disconnect_client_call(struct rxrpc_call *); | |
755 | void rxrpc_put_client_conn(struct rxrpc_connection *); | |
756 | void __exit rxrpc_destroy_all_client_connections(void); | |
4a3388c8 | 757 | |
17926a79 | 758 | /* |
0d81a51a DH |
759 | * conn_event.c |
760 | */ | |
761 | void rxrpc_process_connection(struct work_struct *); | |
0d81a51a DH |
762 | |
763 | /* | |
764 | * conn_object.c | |
17926a79 | 765 | */ |
dad8aff7 | 766 | extern unsigned int rxrpc_connection_expiry; |
17926a79 | 767 | extern struct list_head rxrpc_connections; |
4d028b2c | 768 | extern struct list_head rxrpc_connection_proc_list; |
17926a79 DH |
769 | extern rwlock_t rxrpc_connection_lock; |
770 | ||
8496af50 | 771 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
c6d2b8d7 | 772 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
8496af50 DH |
773 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
774 | struct sk_buff *); | |
45025bce | 775 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
999b69f8 | 776 | void rxrpc_disconnect_call(struct rxrpc_call *); |
45025bce | 777 | void rxrpc_kill_connection(struct rxrpc_connection *); |
363deeab DH |
778 | bool rxrpc_queue_conn(struct rxrpc_connection *); |
779 | void rxrpc_see_connection(struct rxrpc_connection *); | |
780 | void rxrpc_get_connection(struct rxrpc_connection *); | |
781 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); | |
782 | void rxrpc_put_service_conn(struct rxrpc_connection *); | |
c1b1203d | 783 | void __exit rxrpc_destroy_all_connections(void); |
17926a79 | 784 | |
19ffa01c DH |
785 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
786 | { | |
787 | return conn->out_clientflag; | |
788 | } | |
789 | ||
790 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) | |
791 | { | |
e8d70ce1 | 792 | return !rxrpc_conn_is_client(conn); |
19ffa01c DH |
793 | } |
794 | ||
f51b4480 DH |
795 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
796 | { | |
45025bce DH |
797 | if (!conn) |
798 | return; | |
799 | ||
363deeab DH |
800 | if (rxrpc_conn_is_client(conn)) |
801 | rxrpc_put_client_conn(conn); | |
802 | else | |
803 | rxrpc_put_service_conn(conn); | |
5acbee46 DH |
804 | } |
805 | ||
7877a4a4 DH |
806 | /* |
807 | * conn_service.c | |
808 | */ | |
8496af50 DH |
809 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
810 | struct sk_buff *); | |
00e90712 | 811 | struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t); |
248f219c | 812 | void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *); |
001c1122 | 813 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
7877a4a4 | 814 | |
17926a79 | 815 | /* |
0d81a51a | 816 | * input.c |
17926a79 | 817 | */ |
0d81a51a | 818 | void rxrpc_data_ready(struct sock *); |
17926a79 DH |
819 | |
820 | /* | |
0d81a51a | 821 | * insecure.c |
17926a79 | 822 | */ |
0d81a51a | 823 | extern const struct rxrpc_security rxrpc_no_security; |
17926a79 DH |
824 | |
825 | /* | |
0d81a51a | 826 | * key.c |
17926a79 | 827 | */ |
0d81a51a DH |
828 | extern struct key_type key_type_rxrpc; |
829 | extern struct key_type key_type_rxrpc_s; | |
830 | ||
831 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); | |
832 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
833 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, | |
834 | u32); | |
17926a79 | 835 | |
87563616 DH |
836 | /* |
837 | * local_event.c | |
838 | */ | |
4f95dd78 | 839 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
87563616 | 840 | |
17926a79 | 841 | /* |
0d81a51a | 842 | * local_object.c |
17926a79 | 843 | */ |
4f95dd78 DH |
844 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
845 | void __rxrpc_put_local(struct rxrpc_local *); | |
c1b1203d | 846 | void __exit rxrpc_destroy_all_locals(void); |
17926a79 | 847 | |
4f95dd78 DH |
848 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
849 | { | |
850 | atomic_inc(&local->usage); | |
851 | } | |
852 | ||
853 | static inline | |
854 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) | |
855 | { | |
856 | return atomic_inc_not_zero(&local->usage) ? local : NULL; | |
857 | } | |
858 | ||
859 | static inline void rxrpc_put_local(struct rxrpc_local *local) | |
860 | { | |
5627cc8b | 861 | if (local && atomic_dec_and_test(&local->usage)) |
4f95dd78 DH |
862 | __rxrpc_put_local(local); |
863 | } | |
864 | ||
5acbee46 DH |
865 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
866 | { | |
867 | rxrpc_queue_work(&local->processor); | |
868 | } | |
869 | ||
17926a79 | 870 | /* |
0d81a51a | 871 | * misc.c |
17926a79 | 872 | */ |
0d81a51a DH |
873 | extern unsigned int rxrpc_max_backlog __read_mostly; |
874 | extern unsigned int rxrpc_requested_ack_delay; | |
875 | extern unsigned int rxrpc_soft_ack_delay; | |
876 | extern unsigned int rxrpc_idle_ack_delay; | |
877 | extern unsigned int rxrpc_rx_window_size; | |
878 | extern unsigned int rxrpc_rx_mtu; | |
879 | extern unsigned int rxrpc_rx_jumbo_max; | |
0b58b8a1 | 880 | extern unsigned int rxrpc_resend_timeout; |
17926a79 | 881 | |
0d81a51a DH |
882 | extern const s8 rxrpc_ack_priority[]; |
883 | ||
17926a79 | 884 | /* |
0d81a51a | 885 | * output.c |
17926a79 | 886 | */ |
a5af7e1f | 887 | int rxrpc_send_ack_packet(struct rxrpc_call *, bool); |
26cb02aa | 888 | int rxrpc_send_abort_packet(struct rxrpc_call *); |
a1767077 | 889 | int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); |
248f219c | 890 | void rxrpc_reject_packets(struct rxrpc_local *); |
17926a79 DH |
891 | |
892 | /* | |
abe89ef0 | 893 | * peer_event.c |
0d81a51a | 894 | */ |
abe89ef0 | 895 | void rxrpc_error_report(struct sock *); |
f66d7490 | 896 | void rxrpc_peer_error_distributor(struct work_struct *); |
cf1a6474 DH |
897 | void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, |
898 | rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); | |
0d81a51a DH |
899 | |
900 | /* | |
901 | * peer_object.c | |
17926a79 | 902 | */ |
be6e6707 DH |
903 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
904 | const struct sockaddr_rxrpc *); | |
905 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, | |
906 | struct sockaddr_rxrpc *, gfp_t); | |
907 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); | |
248f219c DH |
908 | struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, |
909 | struct rxrpc_peer *); | |
be6e6707 | 910 | |
df5d8bf7 | 911 | static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
be6e6707 DH |
912 | { |
913 | atomic_inc(&peer->usage); | |
df5d8bf7 | 914 | return peer; |
be6e6707 DH |
915 | } |
916 | ||
917 | static inline | |
918 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) | |
919 | { | |
920 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; | |
921 | } | |
922 | ||
923 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); | |
924 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) | |
925 | { | |
5627cc8b | 926 | if (peer && atomic_dec_and_test(&peer->usage)) |
be6e6707 DH |
927 | __rxrpc_put_peer(peer); |
928 | } | |
17926a79 DH |
929 | |
930 | /* | |
0d81a51a | 931 | * proc.c |
17926a79 | 932 | */ |
036c2e27 JE |
933 | extern const struct file_operations rxrpc_call_seq_fops; |
934 | extern const struct file_operations rxrpc_connection_seq_fops; | |
17926a79 DH |
935 | |
936 | /* | |
0d81a51a | 937 | * recvmsg.c |
17926a79 | 938 | */ |
248f219c | 939 | void rxrpc_notify_socket(struct rxrpc_call *); |
1b784140 | 940 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
17926a79 DH |
941 | |
942 | /* | |
0d81a51a DH |
943 | * rxkad.c |
944 | */ | |
945 | #ifdef CONFIG_RXKAD | |
946 | extern const struct rxrpc_security rxkad; | |
947 | #endif | |
948 | ||
949 | /* | |
950 | * security.c | |
17926a79 | 951 | */ |
648af7fc DH |
952 | int __init rxrpc_init_security(void); |
953 | void rxrpc_exit_security(void); | |
c1b1203d JP |
954 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
955 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); | |
71a17de3 | 956 | |
0b58b8a1 DH |
957 | /* |
958 | * sendmsg.c | |
959 | */ | |
960 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); | |
17926a79 DH |
961 | |
962 | /* | |
0d81a51a | 963 | * skbuff.c |
17926a79 | 964 | */ |
d001648e | 965 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
c1b1203d | 966 | void rxrpc_packet_destructor(struct sk_buff *); |
71f3ca40 DH |
967 | void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); |
968 | void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
969 | void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
970 | void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
971 | void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
df844fd4 | 972 | void rxrpc_purge_queue(struct sk_buff_head *); |
17926a79 | 973 | |
5873c083 DH |
974 | /* |
975 | * sysctl.c | |
976 | */ | |
977 | #ifdef CONFIG_SYSCTL | |
978 | extern int __init rxrpc_sysctl_init(void); | |
979 | extern void rxrpc_sysctl_exit(void); | |
980 | #else | |
981 | static inline int __init rxrpc_sysctl_init(void) { return 0; } | |
982 | static inline void rxrpc_sysctl_exit(void) {} | |
983 | #endif | |
984 | ||
be6e6707 DH |
985 | /* |
986 | * utils.c | |
987 | */ | |
d991b4a3 | 988 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
be6e6707 | 989 | |
248f219c DH |
990 | static inline bool before(u32 seq1, u32 seq2) |
991 | { | |
992 | return (s32)(seq1 - seq2) < 0; | |
993 | } | |
994 | static inline bool before_eq(u32 seq1, u32 seq2) | |
995 | { | |
996 | return (s32)(seq1 - seq2) <= 0; | |
997 | } | |
998 | static inline bool after(u32 seq1, u32 seq2) | |
999 | { | |
1000 | return (s32)(seq1 - seq2) > 0; | |
1001 | } | |
1002 | static inline bool after_eq(u32 seq1, u32 seq2) | |
1003 | { | |
1004 | return (s32)(seq1 - seq2) >= 0; | |
1005 | } | |
1006 | ||
17926a79 DH |
1007 | /* |
1008 | * debug tracing | |
1009 | */ | |
95c96174 | 1010 | extern unsigned int rxrpc_debug; |
17926a79 DH |
1011 | |
1012 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 1013 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 1014 | |
0dc47877 HH |
1015 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1016 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 DH |
1017 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1018 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
1019 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
1020 | ||
1021 | ||
1022 | #if defined(__KDEBUG) | |
1023 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1024 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1025 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1026 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
1027 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
1028 | ||
1029 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
1030 | #define RXRPC_DEBUG_KENTER 0x01 | |
1031 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
1032 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
1033 | #define RXRPC_DEBUG_KPROTO 0x08 | |
1034 | #define RXRPC_DEBUG_KNET 0x10 | |
1035 | ||
1036 | #define _enter(FMT,...) \ | |
1037 | do { \ | |
1038 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
1039 | kenter(FMT,##__VA_ARGS__); \ | |
1040 | } while (0) | |
1041 | ||
1042 | #define _leave(FMT,...) \ | |
1043 | do { \ | |
1044 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
1045 | kleave(FMT,##__VA_ARGS__); \ | |
1046 | } while (0) | |
1047 | ||
1048 | #define _debug(FMT,...) \ | |
1049 | do { \ | |
1050 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
1051 | kdebug(FMT,##__VA_ARGS__); \ | |
1052 | } while (0) | |
1053 | ||
1054 | #define _proto(FMT,...) \ | |
1055 | do { \ | |
1056 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
1057 | kproto(FMT,##__VA_ARGS__); \ | |
1058 | } while (0) | |
1059 | ||
1060 | #define _net(FMT,...) \ | |
1061 | do { \ | |
1062 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
1063 | knet(FMT,##__VA_ARGS__); \ | |
1064 | } while (0) | |
1065 | ||
1066 | #else | |
12fdff3f DH |
1067 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1068 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1069 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
1070 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) | |
1071 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) | |
17926a79 DH |
1072 | #endif |
1073 | ||
1074 | /* | |
1075 | * debug assertion checking | |
1076 | */ | |
1077 | #if 1 // defined(__KDEBUGALL) | |
1078 | ||
1079 | #define ASSERT(X) \ | |
1080 | do { \ | |
1081 | if (unlikely(!(X))) { \ | |
9b6d5398 | 1082 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1083 | BUG(); \ |
1084 | } \ | |
b4f1342f | 1085 | } while (0) |
17926a79 DH |
1086 | |
1087 | #define ASSERTCMP(X, OP, Y) \ | |
1088 | do { \ | |
cf13258f DH |
1089 | __typeof__(X) _x = (X); \ |
1090 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 | 1091 | if (unlikely(!(_x OP _y))) { \ |
cf13258f DH |
1092 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
1093 | (unsigned long)_x, (unsigned long)_x, #OP, \ | |
1094 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1095 | BUG(); \ |
1096 | } \ | |
b4f1342f | 1097 | } while (0) |
17926a79 DH |
1098 | |
1099 | #define ASSERTIF(C, X) \ | |
1100 | do { \ | |
1101 | if (unlikely((C) && !(X))) { \ | |
9b6d5398 | 1102 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1103 | BUG(); \ |
1104 | } \ | |
b4f1342f | 1105 | } while (0) |
17926a79 DH |
1106 | |
1107 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1108 | do { \ | |
cf13258f DH |
1109 | __typeof__(X) _x = (X); \ |
1110 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 JP |
1111 | if (unlikely((C) && !(_x OP _y))) { \ |
1112 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
cf13258f DH |
1113 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
1114 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1115 | BUG(); \ |
1116 | } \ | |
b4f1342f | 1117 | } while (0) |
17926a79 DH |
1118 | |
1119 | #else | |
1120 | ||
1121 | #define ASSERT(X) \ | |
1122 | do { \ | |
b4f1342f | 1123 | } while (0) |
17926a79 DH |
1124 | |
1125 | #define ASSERTCMP(X, OP, Y) \ | |
1126 | do { \ | |
b4f1342f | 1127 | } while (0) |
17926a79 DH |
1128 | |
1129 | #define ASSERTIF(C, X) \ | |
1130 | do { \ | |
b4f1342f | 1131 | } while (0) |
17926a79 DH |
1132 | |
1133 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1134 | do { \ | |
b4f1342f | 1135 | } while (0) |
17926a79 DH |
1136 | |
1137 | #endif /* __KDEBUGALL */ |