Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
17926a79 DH |
2 | /* AF_RXRPC internal definitions |
3 | * | |
4 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
17926a79 DH |
6 | */ |
7 | ||
be6e6707 | 8 | #include <linux/atomic.h> |
8496af50 | 9 | #include <linux/seqlock.h> |
c410bf01 | 10 | #include <linux/win_minmax.h> |
2baec2c3 DH |
11 | #include <net/net_namespace.h> |
12 | #include <net/netns/generic.h> | |
e0e4d82f | 13 | #include <net/sock.h> |
be6e6707 | 14 | #include <net/af_rxrpc.h> |
41057ebd | 15 | #include <keys/rxrpc-type.h> |
ddc6c70f | 16 | #include "protocol.h" |
17926a79 | 17 | |
17926a79 DH |
18 | #define FCRYPT_BSIZE 8 |
19 | struct rxrpc_crypt { | |
20 | union { | |
21 | u8 x[FCRYPT_BSIZE]; | |
91e916cf | 22 | __be32 n[2]; |
17926a79 DH |
23 | }; |
24 | } __attribute__((aligned(8))); | |
25 | ||
651350d1 DH |
26 | #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) |
27 | #define rxrpc_queue_delayed_work(WS,D) \ | |
28 | queue_delayed_work(rxrpc_workqueue, (WS), (D)) | |
29 | ||
12da59fc | 30 | struct key_preparsed_payload; |
cc8feb8e | 31 | struct rxrpc_connection; |
02a19356 | 32 | struct rxrpc_txbuf; |
cc8feb8e | 33 | |
d001648e | 34 | /* |
ece64fec DH |
35 | * Mark applied to socket buffers in skb->mark. skb->priority is used |
36 | * to pass supplementary information. | |
d001648e DH |
37 | */ |
38 | enum rxrpc_skb_mark { | |
446b3e14 | 39 | RXRPC_SKB_MARK_PACKET, /* Received packet */ |
ff734825 | 40 | RXRPC_SKB_MARK_ERROR, /* Error notification */ |
ece64fec DH |
41 | RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ |
42 | RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ | |
d001648e DH |
43 | }; |
44 | ||
17926a79 DH |
45 | /* |
46 | * sk_state for RxRPC sockets | |
47 | */ | |
48 | enum { | |
2341e077 DH |
49 | RXRPC_UNBOUND = 0, |
50 | RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ | |
17926a79 | 51 | RXRPC_CLIENT_BOUND, /* client local address bound */ |
17926a79 | 52 | RXRPC_SERVER_BOUND, /* server local address bound */ |
28036f44 | 53 | RXRPC_SERVER_BOUND2, /* second server local address bound */ |
17926a79 | 54 | RXRPC_SERVER_LISTENING, /* server listening for connections */ |
210f0353 | 55 | RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ |
17926a79 DH |
56 | RXRPC_CLOSE, /* socket is being closed */ |
57 | }; | |
58 | ||
2baec2c3 DH |
59 | /* |
60 | * Per-network namespace data. | |
61 | */ | |
62 | struct rxrpc_net { | |
63 | struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ | |
64 | u32 epoch; /* Local epoch for detecting local-end reset */ | |
65 | struct list_head calls; /* List of calls active in this namespace */ | |
ad25f5cb | 66 | spinlock_t call_lock; /* Lock for ->calls */ |
d3be4d24 | 67 | atomic_t nr_calls; /* Count of allocated calls */ |
2baec2c3 | 68 | |
31f5f9a1 | 69 | atomic_t nr_conns; |
2baec2c3 DH |
70 | struct list_head conn_proc_list; /* List of conns in this namespace for proc */ |
71 | struct list_head service_conns; /* Service conns in this namespace */ | |
72 | rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ | |
3d18cbb7 DH |
73 | struct work_struct service_conn_reaper; |
74 | struct timer_list service_conn_reap_timer; | |
2baec2c3 | 75 | |
f859ab61 | 76 | bool live; |
245500d8 DH |
77 | |
78 | bool kill_all_client_conns; | |
79 | atomic_t nr_client_conns; | |
2baec2c3 | 80 | spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ |
3cec055c | 81 | struct mutex client_conn_discard_lock; /* Prevent multiple discarders */ |
2baec2c3 | 82 | struct list_head idle_client_conns; |
3d18cbb7 DH |
83 | struct work_struct client_conn_reaper; |
84 | struct timer_list client_conn_reap_timer; | |
2baec2c3 | 85 | |
33912c26 | 86 | struct hlist_head local_endpoints; |
2baec2c3 DH |
87 | struct mutex local_mutex; /* Lock for ->local_endpoints */ |
88 | ||
2baec2c3 | 89 | DECLARE_HASHTABLE (peer_hash, 10); |
ace45bec DH |
90 | spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ |
91 | ||
92 | #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ | |
93 | u8 peer_keepalive_cursor; | |
330bdcfa DH |
94 | time64_t peer_keepalive_base; |
95 | struct list_head peer_keepalive[32]; | |
96 | struct list_head peer_keepalive_new; | |
ace45bec DH |
97 | struct timer_list peer_keepalive_timer; |
98 | struct work_struct peer_keepalive_work; | |
b0154246 DH |
99 | |
100 | atomic_t stat_tx_data; | |
101 | atomic_t stat_tx_data_retrans; | |
102 | atomic_t stat_tx_data_send; | |
103 | atomic_t stat_tx_data_send_frag; | |
32cf8edb DH |
104 | atomic_t stat_tx_data_send_fail; |
105 | atomic_t stat_tx_data_underflow; | |
106 | atomic_t stat_tx_data_cwnd_reset; | |
b0154246 DH |
107 | atomic_t stat_rx_data; |
108 | atomic_t stat_rx_data_reqack; | |
109 | atomic_t stat_rx_data_jumbo; | |
f2a676d1 DH |
110 | |
111 | atomic_t stat_tx_ack_fill; | |
112 | atomic_t stat_tx_ack_send; | |
113 | atomic_t stat_tx_ack_skip; | |
114 | atomic_t stat_tx_acks[256]; | |
115 | atomic_t stat_rx_acks[256]; | |
f7fa5242 DH |
116 | |
117 | atomic_t stat_why_req_ack[8]; | |
a275da62 DH |
118 | |
119 | atomic_t stat_io_loop; | |
2baec2c3 DH |
120 | }; |
121 | ||
00e90712 DH |
122 | /* |
123 | * Service backlog preallocation. | |
124 | * | |
125 | * This contains circular buffers of preallocated peers, connections and calls | |
126 | * for incoming service calls and their head and tail pointers. This allows | |
127 | * calls to be set up in the data_ready handler, thereby avoiding the need to | |
128 | * shuffle packets around so much. | |
129 | */ | |
130 | struct rxrpc_backlog { | |
131 | unsigned short peer_backlog_head; | |
132 | unsigned short peer_backlog_tail; | |
133 | unsigned short conn_backlog_head; | |
134 | unsigned short conn_backlog_tail; | |
135 | unsigned short call_backlog_head; | |
136 | unsigned short call_backlog_tail; | |
137 | #define RXRPC_BACKLOG_MAX 32 | |
138 | struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; | |
139 | struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; | |
140 | struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; | |
141 | }; | |
142 | ||
17926a79 DH |
143 | /* |
144 | * RxRPC socket definition | |
145 | */ | |
146 | struct rxrpc_sock { | |
147 | /* WARNING: sk has to be the first member */ | |
148 | struct sock sk; | |
d001648e | 149 | rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
00e90712 | 150 | rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ |
17926a79 | 151 | struct rxrpc_local *local; /* local endpoint */ |
00e90712 | 152 | struct rxrpc_backlog *backlog; /* Preallocation for services */ |
248f219c DH |
153 | spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ |
154 | struct list_head sock_calls; /* List of calls owned by this socket */ | |
155 | struct list_head to_be_accepted; /* calls awaiting acceptance */ | |
156 | struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ | |
157 | rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ | |
17926a79 DH |
158 | struct key *key; /* security for this socket */ |
159 | struct key *securities; /* list of server security descriptors */ | |
00e90712 | 160 | struct rb_root calls; /* User ID -> call mapping */ |
17926a79 | 161 | unsigned long flags; |
2341e077 | 162 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
17926a79 DH |
163 | rwlock_t call_lock; /* lock for calls */ |
164 | u32 min_sec_level; /* minimum security level */ | |
165 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT | |
cc8feb8e | 166 | bool exclusive; /* Exclusive connection for a client socket */ |
28036f44 | 167 | u16 second_service; /* Additional service bound to the endpoint */ |
4722974d DH |
168 | struct { |
169 | /* Service upgrade information */ | |
170 | u16 from; /* Service ID to upgrade (if not 0) */ | |
171 | u16 to; /* service ID to upgrade to */ | |
172 | } service_upgrade; | |
cc8feb8e | 173 | sa_family_t family; /* Protocol family created with */ |
4722974d | 174 | struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ |
2341e077 | 175 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
17926a79 DH |
176 | }; |
177 | ||
178 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) | |
179 | ||
0d12f8a4 DH |
180 | /* |
181 | * CPU-byteorder normalised Rx packet header. | |
182 | */ | |
183 | struct rxrpc_host_header { | |
184 | u32 epoch; /* client boot timestamp */ | |
185 | u32 cid; /* connection and channel ID */ | |
186 | u32 callNumber; /* call ID (0 for connection-level packets) */ | |
187 | u32 seq; /* sequence number of pkt in call stream */ | |
188 | u32 serial; /* serial number of pkt sent to network */ | |
189 | u8 type; /* packet type */ | |
190 | u8 flags; /* packet flags */ | |
191 | u8 userStatus; /* app-layer defined status */ | |
192 | u8 securityIndex; /* security protocol ID */ | |
193 | union { | |
194 | u16 _rsvd; /* reserved */ | |
195 | u16 cksum; /* kerberos security checksum */ | |
196 | }; | |
197 | u16 serviceId; /* service ID */ | |
198 | } __packed; | |
199 | ||
17926a79 DH |
200 | /* |
201 | * RxRPC socket buffer private variables | |
202 | * - max 48 bytes (struct sk_buff::cb) | |
203 | */ | |
204 | struct rxrpc_skb_priv { | |
f2cce89a | 205 | struct rxrpc_connection *conn; /* Connection referred to (poke packet) */ |
d4d02d8b DH |
206 | u16 offset; /* Offset of data */ |
207 | u16 len; /* Length of data */ | |
d4d02d8b DH |
208 | u8 flags; |
209 | #define RXRPC_RX_VERIFIED 0x01 | |
210 | ||
211 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ | |
17926a79 DH |
212 | }; |
213 | ||
214 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) | |
215 | ||
17926a79 DH |
216 | /* |
217 | * RxRPC security module interface | |
218 | */ | |
219 | struct rxrpc_security { | |
17926a79 DH |
220 | const char *name; /* name of this service */ |
221 | u8 security_index; /* security type provided */ | |
063c60d3 | 222 | u32 no_key_abort; /* Abort code indicating no key */ |
17926a79 | 223 | |
648af7fc DH |
224 | /* Initialise a security service */ |
225 | int (*init)(void); | |
226 | ||
227 | /* Clean up a security service */ | |
228 | void (*exit)(void); | |
229 | ||
12da59fc DH |
230 | /* Parse the information from a server key */ |
231 | int (*preparse_server_key)(struct key_preparsed_payload *); | |
232 | ||
233 | /* Clean up the preparse buffer after parsing a server key */ | |
234 | void (*free_preparse_server_key)(struct key_preparsed_payload *); | |
235 | ||
236 | /* Destroy the payload of a server key */ | |
237 | void (*destroy_server_key)(struct key *); | |
238 | ||
d5953f65 DH |
239 | /* Describe a server key */ |
240 | void (*describe_server_key)(const struct key *, struct seq_file *); | |
241 | ||
17926a79 | 242 | /* initialise a connection's security */ |
41057ebd DH |
243 | int (*init_connection_security)(struct rxrpc_connection *, |
244 | struct rxrpc_key_token *); | |
17926a79 | 245 | |
d7d775b1 DH |
246 | /* Work out how much data we can store in a packet, given an estimate |
247 | * of the amount of data remaining. | |
248 | */ | |
249 | int (*how_much_data)(struct rxrpc_call *, size_t, | |
250 | size_t *, size_t *, size_t *); | |
17926a79 DH |
251 | |
252 | /* impose security on a packet */ | |
a4ea4c47 | 253 | int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *); |
17926a79 DH |
254 | |
255 | /* verify the security on a received packet */ | |
d4d02d8b | 256 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *); |
248f219c | 257 | |
1db88c53 DH |
258 | /* Free crypto request on a call */ |
259 | void (*free_call_crypto)(struct rxrpc_call *); | |
260 | ||
17926a79 DH |
261 | /* issue a challenge */ |
262 | int (*issue_challenge)(struct rxrpc_connection *); | |
263 | ||
264 | /* respond to a challenge */ | |
265 | int (*respond_to_challenge)(struct rxrpc_connection *, | |
266 | struct sk_buff *, | |
267 | u32 *); | |
268 | ||
269 | /* verify a response */ | |
270 | int (*verify_response)(struct rxrpc_connection *, | |
271 | struct sk_buff *, | |
272 | u32 *); | |
273 | ||
274 | /* clear connection security */ | |
275 | void (*clear)(struct rxrpc_connection *); | |
276 | }; | |
277 | ||
278 | /* | |
4f95dd78 DH |
279 | * RxRPC local transport endpoint description |
280 | * - owned by a single AF_RXRPC socket | |
281 | * - pointed to by transport socket struct sk_user_data | |
17926a79 DH |
282 | */ |
283 | struct rxrpc_local { | |
4f95dd78 | 284 | struct rcu_head rcu; |
730c5fd4 | 285 | atomic_t active_users; /* Number of users of the local endpoint */ |
a0575429 | 286 | refcount_t ref; /* Number of references to the structure */ |
8a758d98 DH |
287 | struct net *net; /* The network namespace */ |
288 | struct rxrpc_net *rxnet; /* Our bits in the network namespace */ | |
33912c26 | 289 | struct hlist_node link; |
17926a79 | 290 | struct socket *socket; /* my UDP socket */ |
a275da62 | 291 | struct task_struct *io_thread; |
8fbcc833 | 292 | struct completion io_thread_ready; /* Indication that the I/O thread started */ |
1e9e5c95 | 293 | struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ |
17926a79 | 294 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
a275da62 | 295 | struct sk_buff_head rx_queue; /* Received packets */ |
f2cce89a | 296 | struct list_head conn_attend_q; /* Conns requiring immediate attention */ |
15f661dc | 297 | struct list_head call_attend_q; /* Calls requiring immediate attention */ |
245500d8 DH |
298 | struct rb_root client_bundles; /* Client connection bundles by socket params */ |
299 | spinlock_t client_bundles_lock; /* Lock for client_bundles */ | |
17926a79 DH |
300 | spinlock_t lock; /* access lock */ |
301 | rwlock_t services_lock; /* lock for services list */ | |
17926a79 | 302 | int debug_id; /* debug ID for printks */ |
4f95dd78 | 303 | bool dead; |
f859ab61 | 304 | bool service_closed; /* Service socket closed */ |
17926a79 DH |
305 | struct sockaddr_rxrpc srx; /* local address */ |
306 | }; | |
307 | ||
308 | /* | |
309 | * RxRPC remote transport endpoint definition | |
be6e6707 | 310 | * - matched by local endpoint, remote port, address and protocol type |
17926a79 DH |
311 | */ |
312 | struct rxrpc_peer { | |
be6e6707 | 313 | struct rcu_head rcu; /* This must be first */ |
a0575429 | 314 | refcount_t ref; |
be6e6707 DH |
315 | unsigned long hash_key; |
316 | struct hlist_node hash_link; | |
317 | struct rxrpc_local *local; | |
f66d7490 | 318 | struct hlist_head error_targets; /* targets for net error distribution */ |
aa390bbe | 319 | struct rb_root service_conns; /* Service connections */ |
330bdcfa | 320 | struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ |
ace45bec | 321 | time64_t last_tx_at; /* Last time packet sent here */ |
8496af50 | 322 | seqlock_t service_conn_lock; |
17926a79 | 323 | spinlock_t lock; /* access lock */ |
95c96174 ED |
324 | unsigned int if_mtu; /* interface MTU for this peer */ |
325 | unsigned int mtu; /* network MTU for this peer */ | |
326 | unsigned int maxdata; /* data size (MTU - hdrsize) */ | |
17926a79 DH |
327 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
328 | int debug_id; /* debug ID for printks */ | |
17926a79 DH |
329 | struct sockaddr_rxrpc srx; /* remote address */ |
330 | ||
331 | /* calculated RTT cache */ | |
332 | #define RXRPC_RTT_CACHE_SIZE 32 | |
c1e15b49 | 333 | spinlock_t rtt_input_lock; /* RTT lock for input routine */ |
0d4b103c | 334 | ktime_t rtt_last_req; /* Time of last RTT request */ |
c410bf01 DH |
335 | unsigned int rtt_count; /* Number of samples we've got */ |
336 | ||
337 | u32 srtt_us; /* smoothed round trip time << 3 in usecs */ | |
338 | u32 mdev_us; /* medium deviation */ | |
339 | u32 mdev_max_us; /* maximal mdev for the last rtt period */ | |
340 | u32 rttvar_us; /* smoothed mdev_max */ | |
341 | u32 rto_j; /* Retransmission timeout in jiffies */ | |
342 | u8 backoff; /* Backoff timeout */ | |
f7aec129 | 343 | |
1fc4fa2a | 344 | u8 cong_ssthresh; /* Congestion slow-start threshold */ |
17926a79 DH |
345 | }; |
346 | ||
19ffa01c DH |
347 | /* |
348 | * Keys for matching a connection. | |
349 | */ | |
350 | struct rxrpc_conn_proto { | |
e8d70ce1 DH |
351 | union { |
352 | struct { | |
353 | u32 epoch; /* epoch of this connection */ | |
354 | u32 cid; /* connection ID */ | |
355 | }; | |
356 | u64 index_key; | |
19ffa01c DH |
357 | }; |
358 | }; | |
359 | ||
360 | struct rxrpc_conn_parameters { | |
361 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
362 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
363 | struct key *key; /* Security details */ | |
364 | bool exclusive; /* T if conn is exclusive */ | |
4e255721 | 365 | bool upgrade; /* T if service ID can be upgraded */ |
19ffa01c DH |
366 | u16 service_id; /* Service ID for this connection */ |
367 | u32 security_level; /* Security level selected */ | |
368 | }; | |
369 | ||
bba304db DH |
370 | /* |
371 | * Bits in the connection flags. | |
372 | */ | |
373 | enum rxrpc_conn_flag { | |
374 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ | |
001c1122 | 375 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
45025bce | 376 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ |
4e255721 | 377 | RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ |
3136ef49 DH |
378 | RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ |
379 | RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ | |
380 | RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ | |
381 | RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ | |
bba304db DH |
382 | }; |
383 | ||
3136ef49 DH |
384 | #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ |
385 | (1UL << RXRPC_CONN_FINAL_ACK_1) | \ | |
386 | (1UL << RXRPC_CONN_FINAL_ACK_2) | \ | |
387 | (1UL << RXRPC_CONN_FINAL_ACK_3)) | |
388 | ||
bba304db DH |
389 | /* |
390 | * Events that can be raised upon a connection. | |
391 | */ | |
392 | enum rxrpc_conn_event { | |
393 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ | |
394 | }; | |
395 | ||
396 | /* | |
397 | * The connection protocol state. | |
398 | */ | |
399 | enum rxrpc_conn_proto_state { | |
400 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ | |
401 | RXRPC_CONN_CLIENT, /* Client connection */ | |
00e90712 | 402 | RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ |
bba304db DH |
403 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
404 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ | |
405 | RXRPC_CONN_SERVICE, /* Service secured connection */ | |
406 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ | |
407 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ | |
bba304db DH |
408 | RXRPC_CONN__NR_STATES |
409 | }; | |
410 | ||
245500d8 DH |
411 | /* |
412 | * RxRPC client connection bundle. | |
413 | */ | |
414 | struct rxrpc_bundle { | |
2cc80086 DH |
415 | struct rxrpc_local *local; /* Representation of local endpoint */ |
416 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
417 | struct key *key; /* Security details */ | |
a0575429 | 418 | refcount_t ref; |
3bcd6c7e | 419 | atomic_t active; /* Number of active users */ |
245500d8 | 420 | unsigned int debug_id; |
2cc80086 DH |
421 | u32 security_level; /* Security level selected */ |
422 | u16 service_id; /* Service ID for this connection */ | |
245500d8 DH |
423 | bool try_upgrade; /* True if the bundle is attempting upgrade */ |
424 | bool alloc_conn; /* True if someone's getting a conn */ | |
2cc80086 DH |
425 | bool exclusive; /* T if conn is exclusive */ |
426 | bool upgrade; /* T if service ID can be upgraded */ | |
8806245a | 427 | short alloc_error; /* Error from last conn allocation */ |
245500d8 DH |
428 | spinlock_t channel_lock; |
429 | struct rb_node local_node; /* Node in local->client_conns */ | |
430 | struct list_head waiting_calls; /* Calls waiting for channels */ | |
431 | unsigned long avail_chans; /* Mask of available channels */ | |
432 | struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ | |
433 | }; | |
434 | ||
17926a79 DH |
435 | /* |
436 | * RxRPC connection definition | |
aa390bbe | 437 | * - matched by { local, peer, epoch, conn_id, direction } |
17926a79 DH |
438 | * - each connection can only handle four simultaneous calls |
439 | */ | |
440 | struct rxrpc_connection { | |
19ffa01c | 441 | struct rxrpc_conn_proto proto; |
2cc80086 DH |
442 | struct rxrpc_local *local; /* Representation of local endpoint */ |
443 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
3cec055c | 444 | struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ |
2cc80086 | 445 | struct key *key; /* Security details */ |
f2cce89a | 446 | struct list_head attend_link; /* Link in local->conn_attend_q */ |
19ffa01c | 447 | |
a0575429 | 448 | refcount_t ref; |
3cec055c | 449 | atomic_t active; /* Active count for service conns */ |
45025bce DH |
450 | struct rcu_head rcu; |
451 | struct list_head cache_link; | |
a1399f8b | 452 | |
245500d8 | 453 | unsigned char act_chans; /* Mask of active channels */ |
a1399f8b | 454 | struct rxrpc_channel { |
3136ef49 | 455 | unsigned long final_ack_at; /* Time at which to issue final ACK */ |
a1399f8b | 456 | struct rxrpc_call __rcu *call; /* Active call */ |
4764c0da | 457 | unsigned int call_debug_id; /* call->debug_id */ |
a1399f8b DH |
458 | u32 call_id; /* ID of current call */ |
459 | u32 call_counter; /* Call ID counter */ | |
460 | u32 last_call; /* ID of last call */ | |
18bfeba5 | 461 | u8 last_type; /* Type of last packet */ |
18bfeba5 DH |
462 | union { |
463 | u32 last_seq; | |
464 | u32 last_abort; | |
465 | }; | |
a1399f8b | 466 | } channels[RXRPC_MAXCALLS]; |
999b69f8 | 467 | |
3136ef49 | 468 | struct timer_list timer; /* Conn event timer */ |
17926a79 | 469 | struct work_struct processor; /* connection event processor */ |
3cec055c | 470 | struct work_struct destructor; /* In-process-context destroyer */ |
245500d8 DH |
471 | struct rxrpc_bundle *bundle; /* Client connection bundle */ |
472 | struct rb_node service_node; /* Node in peer->service_conns */ | |
4d028b2c | 473 | struct list_head proc_link; /* link in procfs list */ |
17926a79 | 474 | struct list_head link; /* link in master connection list */ |
17926a79 | 475 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
521bb304 | 476 | |
648af7fc | 477 | const struct rxrpc_security *security; /* applied security module */ |
521bb304 DH |
478 | union { |
479 | struct { | |
480 | struct crypto_sync_skcipher *cipher; /* encryption handle */ | |
481 | struct rxrpc_crypt csum_iv; /* packet checksum base */ | |
482 | u32 nonce; /* response re-use preventer */ | |
483 | } rxkad; | |
484 | }; | |
4a3388c8 | 485 | unsigned long flags; |
17926a79 | 486 | unsigned long events; |
f51b4480 | 487 | unsigned long idle_timestamp; /* Time at which last became idle */ |
17926a79 | 488 | spinlock_t state_lock; /* state-change lock */ |
cf13258f | 489 | enum rxrpc_conn_proto_state state; /* current state of connection */ |
64753092 | 490 | u32 abort_code; /* Abort code of connection abort */ |
17926a79 | 491 | int debug_id; /* debug ID for printks */ |
17926a79 | 492 | atomic_t serial; /* packet serial number counter */ |
563ea7d5 | 493 | unsigned int hi_serial; /* highest serial number received */ |
c1e15b49 | 494 | u32 service_id; /* Service ID, possibly upgraded */ |
2cc80086 | 495 | u32 security_level; /* Security level selected */ |
17926a79 | 496 | u8 security_ix; /* security type */ |
17926a79 | 497 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
245500d8 | 498 | u8 bundle_shift; /* Index into bundle->avail_chans */ |
2cc80086 DH |
499 | bool exclusive; /* T if conn is exclusive */ |
500 | bool upgrade; /* T if service ID can be upgraded */ | |
501 | u16 orig_service_id; /* Originally requested service ID */ | |
64753092 | 502 | short error; /* Local error code */ |
17926a79 DH |
503 | }; |
504 | ||
dc71db34 DH |
505 | static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) |
506 | { | |
507 | return sp->hdr.flags & RXRPC_CLIENT_INITIATED; | |
508 | } | |
509 | ||
510 | static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) | |
511 | { | |
512 | return !rxrpc_to_server(sp); | |
513 | } | |
514 | ||
5b8848d1 DH |
515 | /* |
516 | * Flags in call->flags. | |
517 | */ | |
518 | enum rxrpc_call_flag { | |
519 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ | |
5b8848d1 | 520 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
dabe5a79 | 521 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
45025bce | 522 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
248f219c DH |
523 | RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ |
524 | RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ | |
a4ea4c47 | 525 | RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */ |
a5af7e1f | 526 | RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ |
57494343 | 527 | RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ |
c54e43d7 | 528 | RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ |
1a025028 | 529 | RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ |
5273a191 | 530 | RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ |
b7a7d674 | 531 | RXRPC_CALL_KERNEL, /* The call was made by the kernel */ |
245500d8 | 532 | RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ |
f3441d41 | 533 | RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */ |
5e6ef4f1 | 534 | RXRPC_CALL_RX_IS_IDLE, /* Reception is idle - send an ACK */ |
5b8848d1 DH |
535 | }; |
536 | ||
537 | /* | |
538 | * Events that can be raised on a call. | |
539 | */ | |
540 | enum rxrpc_call_event { | |
bd1fdf8c | 541 | RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ |
5e6ef4f1 | 542 | RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */ |
5b8848d1 DH |
543 | }; |
544 | ||
545 | /* | |
546 | * The states that a call can be in. | |
547 | */ | |
548 | enum rxrpc_call_state { | |
999b69f8 DH |
549 | RXRPC_CALL_UNINITIALISED, |
550 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ | |
5b8848d1 DH |
551 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
552 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ | |
553 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ | |
00e90712 | 554 | RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ |
5b8848d1 | 555 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
5b8848d1 DH |
556 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ |
557 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ | |
558 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ | |
559 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ | |
f5c17aae | 560 | RXRPC_CALL_COMPLETE, /* - call complete */ |
f5c17aae DH |
561 | NR__RXRPC_CALL_STATES |
562 | }; | |
563 | ||
e122d845 DH |
564 | /* |
565 | * Call completion condition (state == RXRPC_CALL_COMPLETE). | |
566 | */ | |
567 | enum rxrpc_call_completion { | |
568 | RXRPC_CALL_SUCCEEDED, /* - Normal termination */ | |
569 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ | |
570 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ | |
571 | RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ | |
572 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ | |
573 | NR__RXRPC_CALL_COMPLETIONS | |
574 | }; | |
575 | ||
57494343 DH |
576 | /* |
577 | * Call Tx congestion management modes. | |
578 | */ | |
579 | enum rxrpc_congest_mode { | |
580 | RXRPC_CALL_SLOW_START, | |
581 | RXRPC_CALL_CONGEST_AVOIDANCE, | |
582 | RXRPC_CALL_PACKET_LOSS, | |
583 | RXRPC_CALL_FAST_RETRANSMIT, | |
584 | NR__RXRPC_CONGEST_MODES | |
585 | }; | |
586 | ||
17926a79 DH |
587 | /* |
588 | * RxRPC call definition | |
589 | * - matched by { connection, call_id } | |
590 | */ | |
591 | struct rxrpc_call { | |
dee46364 | 592 | struct rcu_head rcu; |
17926a79 | 593 | struct rxrpc_connection *conn; /* connection carrying call */ |
df5d8bf7 | 594 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
f3441d41 | 595 | struct rxrpc_local *local; /* Representation of local endpoint */ |
8d94aa38 | 596 | struct rxrpc_sock __rcu *socket; /* socket responsible */ |
d3be4d24 | 597 | struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ |
f3441d41 | 598 | struct key *key; /* Security details */ |
91fcfbe8 | 599 | const struct rxrpc_security *security; /* applied security module */ |
540b1c48 | 600 | struct mutex user_mutex; /* User access mutex */ |
f3441d41 | 601 | struct sockaddr_rxrpc dest_srx; /* Destination address */ |
530403d9 | 602 | unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ |
bd1fdf8c | 603 | unsigned long ack_lost_at; /* When ACK is figured as lost */ |
a158bdd3 DH |
604 | unsigned long resend_at; /* When next resend needs to happen */ |
605 | unsigned long ping_at; /* When next to send a ping */ | |
415f44e4 | 606 | unsigned long keepalive_at; /* When next to send a keepalive ping */ |
a158bdd3 DH |
607 | unsigned long expect_rx_by; /* When we expect to get a packet by */ |
608 | unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ | |
609 | unsigned long expect_term_by; /* When we expect call termination by */ | |
610 | u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ | |
611 | u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ | |
248f219c | 612 | struct timer_list timer; /* Combined event timer */ |
3feda9d6 | 613 | struct work_struct destroyer; /* In-process-context destroyer */ |
d001648e | 614 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
17926a79 | 615 | struct list_head link; /* link in master call list */ |
245500d8 | 616 | struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ |
f66d7490 | 617 | struct hlist_node error_link; /* link in error distribution list */ |
248f219c DH |
618 | struct list_head accept_link; /* Link in rx->acceptq */ |
619 | struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ | |
620 | struct list_head sock_link; /* Link in rx->sock_calls */ | |
621 | struct rb_node sock_node; /* Node in rx->calls */ | |
15f661dc | 622 | struct list_head attend_link; /* Link in local->call_attend_q */ |
a4ea4c47 | 623 | struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */ |
45025bce | 624 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
e754eba6 | 625 | s64 tx_total_len; /* Total length left to be transmitted (or -1) */ |
17926a79 | 626 | unsigned long user_call_ID; /* user-defined call ID */ |
17926a79 | 627 | unsigned long flags; |
17926a79 | 628 | unsigned long events; |
20acbd9a | 629 | spinlock_t notify_lock; /* Kernel notification lock */ |
17926a79 | 630 | rwlock_t state_lock; /* lock for state transition */ |
a343b174 DH |
631 | const char *send_abort_why; /* String indicating why the abort was sent */ |
632 | s32 send_abort; /* Abort code to be sent */ | |
633 | short send_abort_err; /* Error to be associated with the abort */ | |
634 | s32 abort_code; /* Local/remote abort code */ | |
f5c17aae | 635 | int error; /* Local error incurred */ |
cf13258f DH |
636 | enum rxrpc_call_state state; /* current state of call */ |
637 | enum rxrpc_call_completion completion; /* Call completion condition */ | |
a0575429 | 638 | refcount_t ref; |
278ac0cd | 639 | u8 security_ix; /* Security type */ |
e138aa7d | 640 | enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ |
dabe5a79 DH |
641 | u32 call_id; /* call ID on connection */ |
642 | u32 cid; /* connection ID plus channel index */ | |
f3441d41 | 643 | u32 security_level; /* Security level selected */ |
dabe5a79 | 644 | int debug_id; /* debug ID for printks */ |
8e83134d DH |
645 | unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ |
646 | unsigned short rx_pkt_len; /* Current recvmsg packet len */ | |
17926a79 | 647 | |
5d7edbc9 | 648 | /* Transmitted data tracking. */ |
a4ea4c47 | 649 | spinlock_t tx_lock; /* Transmit queue lock */ |
cf37b598 | 650 | struct list_head tx_sendmsg; /* Sendmsg prepared packets */ |
a4ea4c47 DH |
651 | struct list_head tx_buffer; /* Buffer of transmissible packets */ |
652 | rxrpc_seq_t tx_bottom; /* First packet in buffer */ | |
653 | rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */ | |
cf37b598 | 654 | rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */ |
248f219c | 655 | rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ |
c7e86acf | 656 | u16 tx_backoff; /* Delay to insert due to Tx failure */ |
5d7edbc9 | 657 | u8 tx_winsize; /* Maximum size of Tx window */ |
a4ea4c47 | 658 | #define RXRPC_TX_MAX_WINDOW 128 |
1fc4fa2a | 659 | ktime_t tx_last_sent; /* Last time a transmission occurred */ |
5d7edbc9 DH |
660 | |
661 | /* Received data tracking */ | |
662 | struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */ | |
663 | struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */ | |
664 | ||
665 | rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */ | |
666 | rxrpc_seq_t rx_consumed; /* Highest packet consumed */ | |
667 | rxrpc_serial_t rx_serial; /* Highest serial received for this call */ | |
668 | u8 rx_winsize; /* Size of Rx window */ | |
57494343 DH |
669 | |
670 | /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS | |
671 | * is fixed, we keep these numbers in terms of segments (ie. DATA | |
672 | * packets) rather than bytes. | |
673 | */ | |
674 | #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN | |
5086d9a9 | 675 | #define RXRPC_MIN_CWND (RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4) |
57494343 DH |
676 | u8 cong_cwnd; /* Congestion window size */ |
677 | u8 cong_extra; /* Extra to send for congestion management */ | |
678 | u8 cong_ssthresh; /* Slow-start threshold */ | |
679 | enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ | |
680 | u8 cong_dup_acks; /* Count of ACKs showing missing packets */ | |
681 | u8 cong_cumul_acks; /* Cumulative ACK count */ | |
682 | ktime_t cong_tstamp; /* Last time cwnd was changed */ | |
683 | ||
8940ba3c | 684 | /* Receive-phase ACK management (ACKs we send). */ |
4e36a95e | 685 | u8 ackr_reason; /* reason to ACK */ |
0d12f8a4 | 686 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
5d7edbc9 | 687 | atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */ |
9a3dedcf DH |
688 | atomic_t ackr_nr_unacked; /* Number of unacked packets */ |
689 | atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ | |
5d7edbc9 DH |
690 | struct { |
691 | #define RXRPC_SACK_SIZE 256 | |
692 | /* SACK table for soft-acked packets */ | |
693 | u8 ackr_sack_table[RXRPC_SACK_SIZE]; | |
694 | } __aligned(8); | |
a5af7e1f | 695 | |
4700c4d8 DH |
696 | /* RTT management */ |
697 | rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ | |
698 | ktime_t rtt_sent_at[4]; /* Time packet sent */ | |
699 | unsigned long rtt_avail; /* Mask of available slots in bits 0-3, | |
700 | * Mask of pending samples in 8-11 */ | |
701 | #define RXRPC_CALL_RTT_AVAIL_MASK 0xf | |
702 | #define RXRPC_CALL_RTT_PEND_SHIFT 8 | |
17926a79 | 703 | |
8940ba3c | 704 | /* Transmission-phase ACK management (ACKs we've received). */ |
57494343 | 705 | ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ |
8940ba3c | 706 | rxrpc_seq_t acks_first_seq; /* first sequence number received */ |
81524b63 | 707 | rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ |
a4ea4c47 | 708 | rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */ |
31a1b989 | 709 | rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ |
589a0c1e | 710 | rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ |
31a1b989 DH |
711 | }; |
712 | ||
713 | /* | |
57494343 | 714 | * Summary of a new ACK and the changes it made to the Tx buffer packet states. |
31a1b989 DH |
715 | */ |
716 | struct rxrpc_ack_summary { | |
1fc4fa2a DH |
717 | u16 nr_acks; /* Number of ACKs in packet */ |
718 | u16 nr_new_acks; /* Number of new ACKs in packet */ | |
719 | u16 nr_rot_new_acks; /* Number of rotated new ACKs */ | |
31a1b989 | 720 | u8 ack_reason; |
d57a3a15 | 721 | bool saw_nacks; /* Saw NACKs in packet */ |
31a1b989 | 722 | bool new_low_nack; /* T if new low NACK found */ |
57494343 DH |
723 | bool retrans_timeo; /* T if reTx due to timeout happened */ |
724 | u8 flight_size; /* Number of unreceived transmissions */ | |
725 | /* Place to stash values for tracing */ | |
726 | enum rxrpc_congest_mode mode:8; | |
727 | u8 cwnd; | |
728 | u8 ssthresh; | |
729 | u8 dup_acks; | |
730 | u8 cumulative_acks; | |
17926a79 DH |
731 | }; |
732 | ||
48124178 DH |
733 | /* |
734 | * sendmsg() cmsg-specified parameters. | |
735 | */ | |
736 | enum rxrpc_command { | |
737 | RXRPC_CMD_SEND_DATA, /* send data message */ | |
738 | RXRPC_CMD_SEND_ABORT, /* request abort generation */ | |
48124178 | 739 | RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ |
2d914c1b | 740 | RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ |
48124178 DH |
741 | }; |
742 | ||
743 | struct rxrpc_call_params { | |
744 | s64 tx_total_len; /* Total Tx data length (if send data) */ | |
745 | unsigned long user_call_ID; /* User's call ID */ | |
746 | struct { | |
747 | u32 hard; /* Maximum lifetime (sec) */ | |
748 | u32 idle; /* Max time since last data packet (msec) */ | |
749 | u32 normal; /* Max time since last call packet (msec) */ | |
750 | } timeouts; | |
751 | u8 nr_timeouts; /* Number of timeouts specified */ | |
b7a7d674 | 752 | bool kernel; /* T if kernel is making the call */ |
e138aa7d | 753 | enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ |
48124178 DH |
754 | }; |
755 | ||
756 | struct rxrpc_send_params { | |
757 | struct rxrpc_call_params call; | |
758 | u32 abort_code; /* Abort code to Tx (if abort) */ | |
759 | enum rxrpc_command command : 8; /* The command to implement */ | |
760 | bool exclusive; /* Shared or exclusive call */ | |
761 | bool upgrade; /* If the connection is upgradeable */ | |
762 | }; | |
763 | ||
02a19356 DH |
764 | /* |
765 | * Buffer of data to be output as a packet. | |
766 | */ | |
767 | struct rxrpc_txbuf { | |
768 | struct rcu_head rcu; | |
cf37b598 | 769 | struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */ |
02a19356 | 770 | struct list_head tx_link; /* Link in live Enc queue or Tx queue */ |
02a19356 DH |
771 | ktime_t last_sent; /* Time at which last transmitted */ |
772 | refcount_t ref; | |
773 | rxrpc_seq_t seq; /* Sequence number of this packet */ | |
774 | unsigned int call_debug_id; | |
775 | unsigned int debug_id; | |
776 | unsigned int len; /* Amount of data in buffer */ | |
777 | unsigned int space; /* Remaining data space */ | |
778 | unsigned int offset; /* Offset of fill point */ | |
779 | unsigned long flags; | |
d57a3a15 DH |
780 | #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */ |
781 | #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */ | |
72f0c6fb | 782 | u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ |
02a19356 DH |
783 | struct { |
784 | /* The packet for encrypting and DMA'ing. We align it such | |
785 | * that data[] aligns correctly for any crypto blocksize. | |
786 | */ | |
787 | u8 pad[64 - sizeof(struct rxrpc_wire_header)]; | |
788 | struct rxrpc_wire_header wire; /* Network-ready header */ | |
72f0c6fb DH |
789 | union { |
790 | u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */ | |
791 | struct { | |
792 | struct rxrpc_ackpacket ack; | |
793 | u8 acks[0]; | |
794 | }; | |
795 | }; | |
02a19356 DH |
796 | } __aligned(64); |
797 | }; | |
798 | ||
799 | static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) | |
800 | { | |
801 | return txb->wire.flags & RXRPC_CLIENT_INITIATED; | |
802 | } | |
803 | ||
804 | static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) | |
805 | { | |
806 | return !rxrpc_sending_to_server(txb); | |
807 | } | |
808 | ||
df844fd4 DH |
809 | #include <trace/events/rxrpc.h> |
810 | ||
17926a79 | 811 | /* |
651350d1 | 812 | * af_rxrpc.c |
17926a79 | 813 | */ |
a4ea4c47 | 814 | extern atomic_t rxrpc_n_rx_skbs; |
651350d1 | 815 | extern struct workqueue_struct *rxrpc_workqueue; |
17926a79 DH |
816 | |
817 | /* | |
0d81a51a | 818 | * call_accept.c |
17926a79 | 819 | */ |
00e90712 DH |
820 | int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); |
821 | void rxrpc_discard_prealloc(struct rxrpc_sock *); | |
31d35a02 DH |
822 | int rxrpc_new_incoming_call(struct rxrpc_local *, struct rxrpc_peer *, |
823 | struct rxrpc_connection *, struct sockaddr_rxrpc *, | |
824 | struct sk_buff *); | |
4f95dd78 | 825 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
2d914c1b | 826 | int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); |
17926a79 DH |
827 | |
828 | /* | |
0d81a51a | 829 | * call_event.c |
17926a79 | 830 | */ |
72f0c6fb DH |
831 | void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, |
832 | enum rxrpc_propose_ack_trace why); | |
833 | void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); | |
530403d9 DH |
834 | void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, |
835 | enum rxrpc_propose_ack_trace); | |
a4ea4c47 | 836 | void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); |
5e6ef4f1 | 837 | void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb); |
17926a79 | 838 | |
4a7f62f9 DH |
839 | void rxrpc_reduce_call_timer(struct rxrpc_call *call, |
840 | unsigned long expire_at, | |
841 | unsigned long now, | |
842 | enum rxrpc_timer_trace why); | |
843 | ||
5e6ef4f1 DH |
844 | void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb); |
845 | ||
17926a79 | 846 | /* |
0d81a51a | 847 | * call_object.c |
17926a79 | 848 | */ |
f5c17aae DH |
849 | extern const char *const rxrpc_call_states[]; |
850 | extern const char *const rxrpc_call_completions[]; | |
17926a79 | 851 | extern struct kmem_cache *rxrpc_call_jar; |
17926a79 | 852 | |
15f661dc | 853 | void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what); |
2341e077 | 854 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
a25e21f0 | 855 | struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); |
2341e077 | 856 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
19ffa01c | 857 | struct rxrpc_conn_parameters *, |
999b69f8 | 858 | struct sockaddr_rxrpc *, |
a25e21f0 DH |
859 | struct rxrpc_call_params *, gfp_t, |
860 | unsigned int); | |
248f219c DH |
861 | void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, |
862 | struct sk_buff *); | |
8d94aa38 | 863 | void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); |
c1b1203d | 864 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
cb0fc0c9 | 865 | void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace); |
5e6ef4f1 | 866 | struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
fff72429 DH |
867 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
868 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); | |
00e90712 | 869 | void rxrpc_cleanup_call(struct rxrpc_call *); |
2baec2c3 | 870 | void rxrpc_destroy_all_calls(struct rxrpc_net *); |
17926a79 | 871 | |
dabe5a79 DH |
872 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
873 | { | |
874 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); | |
875 | } | |
876 | ||
877 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) | |
878 | { | |
879 | return !rxrpc_is_service_call(call); | |
880 | } | |
881 | ||
4a3388c8 DH |
882 | /* |
883 | * conn_client.c | |
884 | */ | |
45025bce | 885 | extern unsigned int rxrpc_reap_client_connections; |
a158bdd3 DH |
886 | extern unsigned long rxrpc_conn_idle_client_expiry; |
887 | extern unsigned long rxrpc_conn_idle_client_fast_expiry; | |
4a3388c8 DH |
888 | extern struct idr rxrpc_client_conn_ids; |
889 | ||
eb9b9d22 | 890 | void rxrpc_destroy_client_conn_ids(void); |
fa3492ab DH |
891 | struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); |
892 | void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); | |
5e33a23b DH |
893 | int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, |
894 | struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, | |
895 | gfp_t); | |
45025bce | 896 | void rxrpc_expose_client_call(struct rxrpc_call *); |
245500d8 | 897 | void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); |
7fa25105 | 898 | void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); |
2baec2c3 DH |
899 | void rxrpc_discard_expired_client_conns(struct work_struct *); |
900 | void rxrpc_destroy_all_client_connections(struct rxrpc_net *); | |
d12040b6 | 901 | void rxrpc_clean_up_local_conns(struct rxrpc_local *); |
4a3388c8 | 902 | |
17926a79 | 903 | /* |
0d81a51a DH |
904 | * conn_event.c |
905 | */ | |
30df927b DH |
906 | void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, struct sk_buff *skb, |
907 | unsigned int channel); | |
0d81a51a | 908 | void rxrpc_process_connection(struct work_struct *); |
ddc7834a | 909 | void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); |
5e6ef4f1 | 910 | int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb); |
f2cce89a | 911 | void rxrpc_input_conn_event(struct rxrpc_connection *conn, struct sk_buff *skb); |
0d81a51a DH |
912 | |
913 | /* | |
914 | * conn_object.c | |
17926a79 | 915 | */ |
dad8aff7 | 916 | extern unsigned int rxrpc_connection_expiry; |
f859ab61 | 917 | extern unsigned int rxrpc_closed_conn_expiry; |
17926a79 | 918 | |
f2cce89a | 919 | void rxrpc_poke_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why); |
3cec055c | 920 | struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t); |
5e6ef4f1 DH |
921 | struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *, |
922 | struct sockaddr_rxrpc *, | |
923 | struct sk_buff *); | |
45025bce | 924 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
999b69f8 | 925 | void rxrpc_disconnect_call(struct rxrpc_call *); |
3cec055c DH |
926 | void rxrpc_kill_client_conn(struct rxrpc_connection *); |
927 | void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); | |
7fa25105 DH |
928 | void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); |
929 | struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *, | |
930 | enum rxrpc_conn_trace); | |
931 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *, | |
932 | enum rxrpc_conn_trace); | |
3cec055c | 933 | void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); |
2baec2c3 DH |
934 | void rxrpc_service_connection_reaper(struct work_struct *); |
935 | void rxrpc_destroy_all_connections(struct rxrpc_net *); | |
17926a79 | 936 | |
19ffa01c DH |
937 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
938 | { | |
939 | return conn->out_clientflag; | |
940 | } | |
941 | ||
942 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) | |
943 | { | |
e8d70ce1 | 944 | return !rxrpc_conn_is_client(conn); |
19ffa01c DH |
945 | } |
946 | ||
3136ef49 DH |
947 | static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, |
948 | unsigned long expire_at) | |
949 | { | |
950 | timer_reduce(&conn->timer, expire_at); | |
951 | } | |
952 | ||
7877a4a4 DH |
953 | /* |
954 | * conn_service.c | |
955 | */ | |
8496af50 DH |
956 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
957 | struct sk_buff *); | |
2baec2c3 | 958 | struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); |
063c60d3 | 959 | void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, |
ec832bd0 | 960 | const struct rxrpc_security *, struct sk_buff *); |
001c1122 | 961 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
7877a4a4 | 962 | |
17926a79 | 963 | /* |
0d81a51a | 964 | * input.c |
17926a79 | 965 | */ |
5086d9a9 | 966 | void rxrpc_congestion_degrade(struct rxrpc_call *); |
5e6ef4f1 DH |
967 | void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *); |
968 | void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *); | |
96b2d69b DH |
969 | |
970 | /* | |
971 | * io_thread.c | |
972 | */ | |
446b3e14 | 973 | int rxrpc_encap_rcv(struct sock *, struct sk_buff *); |
ff734825 | 974 | void rxrpc_error_report(struct sock *); |
a275da62 DH |
975 | int rxrpc_io_thread(void *data); |
976 | static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local) | |
977 | { | |
978 | wake_up_process(local->io_thread); | |
979 | } | |
17926a79 DH |
980 | |
981 | /* | |
0d81a51a | 982 | * insecure.c |
17926a79 | 983 | */ |
0d81a51a | 984 | extern const struct rxrpc_security rxrpc_no_security; |
17926a79 DH |
985 | |
986 | /* | |
0d81a51a | 987 | * key.c |
17926a79 | 988 | */ |
0d81a51a | 989 | extern struct key_type key_type_rxrpc; |
0d81a51a | 990 | |
a7b75c5a | 991 | int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); |
10674a03 | 992 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, |
0d81a51a | 993 | u32); |
17926a79 | 994 | |
87563616 DH |
995 | /* |
996 | * local_event.c | |
997 | */ | |
5e6ef4f1 DH |
998 | void rxrpc_send_version_request(struct rxrpc_local *local, |
999 | struct rxrpc_host_header *hdr, | |
1000 | struct sk_buff *skb); | |
87563616 | 1001 | |
17926a79 | 1002 | /* |
0d81a51a | 1003 | * local_object.c |
17926a79 | 1004 | */ |
2baec2c3 | 1005 | struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); |
0fde882f DH |
1006 | struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace); |
1007 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace); | |
1008 | void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace); | |
1009 | struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace); | |
1010 | void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace); | |
a275da62 | 1011 | void rxrpc_destroy_local(struct rxrpc_local *local); |
2baec2c3 | 1012 | void rxrpc_destroy_all_locals(struct rxrpc_net *); |
17926a79 | 1013 | |
0fde882f DH |
1014 | static inline bool __rxrpc_use_local(struct rxrpc_local *local, |
1015 | enum rxrpc_local_trace why) | |
1016 | { | |
1017 | int r, u; | |
1018 | ||
1019 | r = refcount_read(&local->ref); | |
1020 | u = atomic_fetch_add_unless(&local->active_users, 1, 0); | |
1021 | trace_rxrpc_local(local->debug_id, why, r, u); | |
1022 | return u != 0; | |
04d36d74 DH |
1023 | } |
1024 | ||
0fde882f DH |
1025 | static inline void rxrpc_see_local(struct rxrpc_local *local, |
1026 | enum rxrpc_local_trace why) | |
04d36d74 | 1027 | { |
0fde882f DH |
1028 | int r, u; |
1029 | ||
1030 | r = refcount_read(&local->ref); | |
1031 | u = atomic_read(&local->active_users); | |
1032 | trace_rxrpc_local(local->debug_id, why, r, u); | |
04d36d74 DH |
1033 | } |
1034 | ||
17926a79 | 1035 | /* |
0d81a51a | 1036 | * misc.c |
17926a79 | 1037 | */ |
0d81a51a | 1038 | extern unsigned int rxrpc_max_backlog __read_mostly; |
a158bdd3 DH |
1039 | extern unsigned long rxrpc_soft_ack_delay; |
1040 | extern unsigned long rxrpc_idle_ack_delay; | |
0d81a51a DH |
1041 | extern unsigned int rxrpc_rx_window_size; |
1042 | extern unsigned int rxrpc_rx_mtu; | |
1043 | extern unsigned int rxrpc_rx_jumbo_max; | |
17926a79 | 1044 | |
2baec2c3 DH |
1045 | /* |
1046 | * net_ns.c | |
1047 | */ | |
1048 | extern unsigned int rxrpc_net_id; | |
1049 | extern struct pernet_operations rxrpc_net_ops; | |
1050 | ||
1051 | static inline struct rxrpc_net *rxrpc_net(struct net *net) | |
1052 | { | |
1053 | return net_generic(net, rxrpc_net_id); | |
1054 | } | |
1055 | ||
17926a79 | 1056 | /* |
0d81a51a | 1057 | * output.c |
17926a79 | 1058 | */ |
b0346843 | 1059 | int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb); |
26cb02aa | 1060 | int rxrpc_send_abort_packet(struct rxrpc_call *); |
a4ea4c47 | 1061 | int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *); |
5e6ef4f1 | 1062 | void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb); |
ace45bec | 1063 | void rxrpc_send_keepalive(struct rxrpc_peer *); |
cf37b598 | 1064 | void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb); |
17926a79 DH |
1065 | |
1066 | /* | |
abe89ef0 | 1067 | * peer_event.c |
0d81a51a | 1068 | */ |
ff734825 | 1069 | void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *); |
ace45bec | 1070 | void rxrpc_peer_keepalive_worker(struct work_struct *); |
0d81a51a DH |
1071 | |
1072 | /* | |
1073 | * peer_object.c | |
17926a79 | 1074 | */ |
be6e6707 DH |
1075 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
1076 | const struct sockaddr_rxrpc *); | |
8a758d98 DH |
1077 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local, |
1078 | struct sockaddr_rxrpc *srx, gfp_t gfp); | |
47c810a7 DH |
1079 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t, |
1080 | enum rxrpc_peer_trace); | |
8a758d98 | 1081 | void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer); |
17226f12 | 1082 | void rxrpc_destroy_all_peers(struct rxrpc_net *); |
47c810a7 DH |
1083 | struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); |
1084 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace); | |
1085 | void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); | |
17926a79 DH |
1086 | |
1087 | /* | |
0d81a51a | 1088 | * proc.c |
17926a79 | 1089 | */ |
c3506372 CH |
1090 | extern const struct seq_operations rxrpc_call_seq_ops; |
1091 | extern const struct seq_operations rxrpc_connection_seq_ops; | |
bc0e7cf4 | 1092 | extern const struct seq_operations rxrpc_peer_seq_ops; |
33912c26 | 1093 | extern const struct seq_operations rxrpc_local_seq_ops; |
17926a79 DH |
1094 | |
1095 | /* | |
0d81a51a | 1096 | * recvmsg.c |
17926a79 | 1097 | */ |
248f219c | 1098 | void rxrpc_notify_socket(struct rxrpc_call *); |
3067bf8c DH |
1099 | bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); |
1100 | bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); | |
1101 | bool __rxrpc_call_completed(struct rxrpc_call *); | |
1102 | bool rxrpc_call_completed(struct rxrpc_call *); | |
1103 | bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); | |
1104 | bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); | |
1b784140 | 1105 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
17926a79 | 1106 | |
3067bf8c DH |
1107 | /* |
1108 | * Abort a call due to a protocol error. | |
1109 | */ | |
1110 | static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, | |
1111 | struct sk_buff *skb, | |
1112 | const char *eproto_why, | |
1113 | const char *why, | |
1114 | u32 abort_code) | |
1115 | { | |
1116 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); | |
1117 | ||
1118 | trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); | |
1119 | return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); | |
1120 | } | |
1121 | ||
1122 | #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ | |
1123 | __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ | |
1124 | (abort_why), (abort_code)) | |
1125 | ||
c410bf01 DH |
1126 | /* |
1127 | * rtt.c | |
1128 | */ | |
4700c4d8 | 1129 | void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, |
c410bf01 DH |
1130 | rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); |
1131 | unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); | |
1132 | void rxrpc_peer_init_rtt(struct rxrpc_peer *); | |
1133 | ||
17926a79 | 1134 | /* |
0d81a51a DH |
1135 | * rxkad.c |
1136 | */ | |
1137 | #ifdef CONFIG_RXKAD | |
1138 | extern const struct rxrpc_security rxkad; | |
1139 | #endif | |
1140 | ||
1141 | /* | |
1142 | * security.c | |
17926a79 | 1143 | */ |
648af7fc | 1144 | int __init rxrpc_init_security(void); |
12da59fc | 1145 | const struct rxrpc_security *rxrpc_security_lookup(u8); |
648af7fc | 1146 | void rxrpc_exit_security(void); |
f3441d41 | 1147 | int rxrpc_init_client_call_security(struct rxrpc_call *); |
c1b1203d | 1148 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
ec832bd0 DH |
1149 | const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, |
1150 | struct sk_buff *); | |
1151 | struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, | |
1152 | struct sk_buff *, u32, u32); | |
71a17de3 | 1153 | |
0b58b8a1 DH |
1154 | /* |
1155 | * sendmsg.c | |
1156 | */ | |
a343b174 DH |
1157 | bool rxrpc_propose_abort(struct rxrpc_call *call, |
1158 | u32 abort_code, int error, const char *why); | |
0b58b8a1 | 1159 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
17926a79 | 1160 | |
ca7fb100 DH |
1161 | /* |
1162 | * server_key.c | |
1163 | */ | |
1164 | extern struct key_type key_type_rxrpc_s; | |
1165 | ||
1166 | int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); | |
1167 | ||
17926a79 | 1168 | /* |
0d81a51a | 1169 | * skbuff.c |
17926a79 | 1170 | */ |
d001648e | 1171 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
71f3ca40 DH |
1172 | void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); |
1173 | void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
d0d5c0cd | 1174 | void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); |
71f3ca40 DH |
1175 | void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); |
1176 | void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); | |
df844fd4 | 1177 | void rxrpc_purge_queue(struct sk_buff_head *); |
17926a79 | 1178 | |
b0154246 DH |
1179 | /* |
1180 | * stats.c | |
1181 | */ | |
1182 | int rxrpc_stats_show(struct seq_file *seq, void *v); | |
1183 | int rxrpc_stats_clear(struct file *file, char *buf, size_t size); | |
1184 | ||
1185 | #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) | |
1186 | #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) | |
1187 | ||
5873c083 DH |
1188 | /* |
1189 | * sysctl.c | |
1190 | */ | |
1191 | #ifdef CONFIG_SYSCTL | |
1192 | extern int __init rxrpc_sysctl_init(void); | |
1193 | extern void rxrpc_sysctl_exit(void); | |
1194 | #else | |
1195 | static inline int __init rxrpc_sysctl_init(void) { return 0; } | |
1196 | static inline void rxrpc_sysctl_exit(void) {} | |
1197 | #endif | |
1198 | ||
02a19356 DH |
1199 | /* |
1200 | * txbuf.c | |
1201 | */ | |
1202 | extern atomic_t rxrpc_nr_txbuf; | |
1203 | struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, | |
1204 | gfp_t gfp); | |
1205 | void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); | |
1206 | void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); | |
1207 | void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); | |
1208 | ||
be6e6707 DH |
1209 | /* |
1210 | * utils.c | |
1211 | */ | |
5a790b73 | 1212 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
be6e6707 | 1213 | |
248f219c DH |
1214 | static inline bool before(u32 seq1, u32 seq2) |
1215 | { | |
1216 | return (s32)(seq1 - seq2) < 0; | |
1217 | } | |
1218 | static inline bool before_eq(u32 seq1, u32 seq2) | |
1219 | { | |
1220 | return (s32)(seq1 - seq2) <= 0; | |
1221 | } | |
1222 | static inline bool after(u32 seq1, u32 seq2) | |
1223 | { | |
1224 | return (s32)(seq1 - seq2) > 0; | |
1225 | } | |
1226 | static inline bool after_eq(u32 seq1, u32 seq2) | |
1227 | { | |
1228 | return (s32)(seq1 - seq2) >= 0; | |
1229 | } | |
1230 | ||
17926a79 DH |
1231 | /* |
1232 | * debug tracing | |
1233 | */ | |
95c96174 | 1234 | extern unsigned int rxrpc_debug; |
17926a79 DH |
1235 | |
1236 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 1237 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 1238 | |
0dc47877 HH |
1239 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1240 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 | 1241 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
17926a79 DH |
1242 | |
1243 | ||
1244 | #if defined(__KDEBUG) | |
1245 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1246 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1247 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
17926a79 DH |
1248 | |
1249 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
1250 | #define RXRPC_DEBUG_KENTER 0x01 | |
1251 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
1252 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
17926a79 DH |
1253 | |
1254 | #define _enter(FMT,...) \ | |
1255 | do { \ | |
1256 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
1257 | kenter(FMT,##__VA_ARGS__); \ | |
1258 | } while (0) | |
1259 | ||
1260 | #define _leave(FMT,...) \ | |
1261 | do { \ | |
1262 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
1263 | kleave(FMT,##__VA_ARGS__); \ | |
1264 | } while (0) | |
1265 | ||
1266 | #define _debug(FMT,...) \ | |
1267 | do { \ | |
1268 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
1269 | kdebug(FMT,##__VA_ARGS__); \ | |
1270 | } while (0) | |
1271 | ||
17926a79 | 1272 | #else |
12fdff3f DH |
1273 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1274 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1275 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
17926a79 DH |
1276 | #endif |
1277 | ||
1278 | /* | |
1279 | * debug assertion checking | |
1280 | */ | |
1281 | #if 1 // defined(__KDEBUGALL) | |
1282 | ||
1283 | #define ASSERT(X) \ | |
1284 | do { \ | |
1285 | if (unlikely(!(X))) { \ | |
9b6d5398 | 1286 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1287 | BUG(); \ |
1288 | } \ | |
b4f1342f | 1289 | } while (0) |
17926a79 DH |
1290 | |
1291 | #define ASSERTCMP(X, OP, Y) \ | |
1292 | do { \ | |
cf13258f DH |
1293 | __typeof__(X) _x = (X); \ |
1294 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 | 1295 | if (unlikely(!(_x OP _y))) { \ |
cf13258f DH |
1296 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
1297 | (unsigned long)_x, (unsigned long)_x, #OP, \ | |
1298 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1299 | BUG(); \ |
1300 | } \ | |
b4f1342f | 1301 | } while (0) |
17926a79 DH |
1302 | |
1303 | #define ASSERTIF(C, X) \ | |
1304 | do { \ | |
1305 | if (unlikely((C) && !(X))) { \ | |
9b6d5398 | 1306 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
1307 | BUG(); \ |
1308 | } \ | |
b4f1342f | 1309 | } while (0) |
17926a79 DH |
1310 | |
1311 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1312 | do { \ | |
cf13258f DH |
1313 | __typeof__(X) _x = (X); \ |
1314 | __typeof__(Y) _y = (__typeof__(X))(Y); \ | |
9b6d5398 JP |
1315 | if (unlikely((C) && !(_x OP _y))) { \ |
1316 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
cf13258f DH |
1317 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
1318 | (unsigned long)_y, (unsigned long)_y); \ | |
17926a79 DH |
1319 | BUG(); \ |
1320 | } \ | |
b4f1342f | 1321 | } while (0) |
17926a79 DH |
1322 | |
1323 | #else | |
1324 | ||
1325 | #define ASSERT(X) \ | |
1326 | do { \ | |
b4f1342f | 1327 | } while (0) |
17926a79 DH |
1328 | |
1329 | #define ASSERTCMP(X, OP, Y) \ | |
1330 | do { \ | |
b4f1342f | 1331 | } while (0) |
17926a79 DH |
1332 | |
1333 | #define ASSERTIF(C, X) \ | |
1334 | do { \ | |
b4f1342f | 1335 | } while (0) |
17926a79 DH |
1336 | |
1337 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1338 | do { \ | |
b4f1342f | 1339 | } while (0) |
17926a79 DH |
1340 | |
1341 | #endif /* __KDEBUGALL */ |