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Commit | Line | Data |
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17926a79 DH |
1 | /* AF_RXRPC implementation |
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 | ||
9b6d5398 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
17926a79 | 14 | #include <linux/module.h> |
ce6654cf | 15 | #include <linux/kernel.h> |
17926a79 | 16 | #include <linux/net.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
17926a79 | 18 | #include <linux/skbuff.h> |
5f2d9c44 | 19 | #include <linux/random.h> |
17926a79 DH |
20 | #include <linux/poll.h> |
21 | #include <linux/proc_fs.h> | |
76181c13 | 22 | #include <linux/key-type.h> |
457c4cbc | 23 | #include <net/net_namespace.h> |
17926a79 DH |
24 | #include <net/sock.h> |
25 | #include <net/af_rxrpc.h> | |
df844fd4 | 26 | #define CREATE_TRACE_POINTS |
17926a79 DH |
27 | #include "ar-internal.h" |
28 | ||
29 | MODULE_DESCRIPTION("RxRPC network protocol"); | |
30 | MODULE_AUTHOR("Red Hat, Inc."); | |
31 | MODULE_LICENSE("GPL"); | |
32 | MODULE_ALIAS_NETPROTO(PF_RXRPC); | |
33 | ||
95c96174 | 34 | unsigned int rxrpc_debug; // = RXRPC_DEBUG_KPROTO; |
d6444062 | 35 | module_param_named(debug, rxrpc_debug, uint, 0644); |
424b00e2 | 36 | MODULE_PARM_DESC(debug, "RxRPC debugging mask"); |
17926a79 | 37 | |
17926a79 DH |
38 | static struct proto rxrpc_proto; |
39 | static const struct proto_ops rxrpc_rpc_ops; | |
40 | ||
17926a79 DH |
41 | /* current debugging ID */ |
42 | atomic_t rxrpc_debug_id; | |
a25e21f0 | 43 | EXPORT_SYMBOL(rxrpc_debug_id); |
17926a79 DH |
44 | |
45 | /* count of skbs currently in use */ | |
71f3ca40 | 46 | atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; |
17926a79 | 47 | |
651350d1 DH |
48 | struct workqueue_struct *rxrpc_workqueue; |
49 | ||
17926a79 DH |
50 | static void rxrpc_sock_destructor(struct sock *); |
51 | ||
52 | /* | |
53 | * see if an RxRPC socket is currently writable | |
54 | */ | |
55 | static inline int rxrpc_writable(struct sock *sk) | |
56 | { | |
14afee4b | 57 | return refcount_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf; |
17926a79 DH |
58 | } |
59 | ||
60 | /* | |
61 | * wait for write bufferage to become available | |
62 | */ | |
63 | static void rxrpc_write_space(struct sock *sk) | |
64 | { | |
65 | _enter("%p", sk); | |
43815482 | 66 | rcu_read_lock(); |
17926a79 | 67 | if (rxrpc_writable(sk)) { |
43815482 ED |
68 | struct socket_wq *wq = rcu_dereference(sk->sk_wq); |
69 | ||
1ce0bf50 | 70 | if (skwq_has_sleeper(wq)) |
43815482 | 71 | wake_up_interruptible(&wq->wait); |
8d8ad9d7 | 72 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
17926a79 | 73 | } |
43815482 | 74 | rcu_read_unlock(); |
17926a79 DH |
75 | } |
76 | ||
77 | /* | |
78 | * validate an RxRPC address | |
79 | */ | |
80 | static int rxrpc_validate_address(struct rxrpc_sock *rx, | |
81 | struct sockaddr_rxrpc *srx, | |
82 | int len) | |
83 | { | |
dad8aff7 | 84 | unsigned int tail; |
ab802ee0 | 85 | |
17926a79 DH |
86 | if (len < sizeof(struct sockaddr_rxrpc)) |
87 | return -EINVAL; | |
88 | ||
89 | if (srx->srx_family != AF_RXRPC) | |
90 | return -EAFNOSUPPORT; | |
91 | ||
92 | if (srx->transport_type != SOCK_DGRAM) | |
93 | return -ESOCKTNOSUPPORT; | |
94 | ||
95 | len -= offsetof(struct sockaddr_rxrpc, transport); | |
96 | if (srx->transport_len < sizeof(sa_family_t) || | |
97 | srx->transport_len > len) | |
98 | return -EINVAL; | |
99 | ||
19ffa01c | 100 | if (srx->transport.family != rx->family) |
17926a79 DH |
101 | return -EAFNOSUPPORT; |
102 | ||
103 | switch (srx->transport.family) { | |
104 | case AF_INET: | |
4f95dd78 DH |
105 | if (srx->transport_len < sizeof(struct sockaddr_in)) |
106 | return -EINVAL; | |
ab802ee0 | 107 | tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad); |
17926a79 DH |
108 | break; |
109 | ||
d1912747 | 110 | #ifdef CONFIG_AF_RXRPC_IPV6 |
17926a79 | 111 | case AF_INET6: |
75b54cb5 DH |
112 | if (srx->transport_len < sizeof(struct sockaddr_in6)) |
113 | return -EINVAL; | |
114 | tail = offsetof(struct sockaddr_rxrpc, transport) + | |
115 | sizeof(struct sockaddr_in6); | |
116 | break; | |
d1912747 | 117 | #endif |
75b54cb5 | 118 | |
17926a79 DH |
119 | default: |
120 | return -EAFNOSUPPORT; | |
121 | } | |
122 | ||
ab802ee0 DH |
123 | if (tail < len) |
124 | memset((void *)srx + tail, 0, len - tail); | |
75b54cb5 | 125 | _debug("INET: %pISp", &srx->transport); |
17926a79 DH |
126 | return 0; |
127 | } | |
128 | ||
129 | /* | |
130 | * bind a local address to an RxRPC socket | |
131 | */ | |
132 | static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len) | |
133 | { | |
b4f1342f | 134 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr; |
17926a79 | 135 | struct rxrpc_local *local; |
68d6d1ae | 136 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
1e9e5c95 | 137 | u16 service_id = srx->srx_service; |
17926a79 DH |
138 | int ret; |
139 | ||
140 | _enter("%p,%p,%d", rx, saddr, len); | |
141 | ||
142 | ret = rxrpc_validate_address(rx, srx, len); | |
143 | if (ret < 0) | |
144 | goto error; | |
145 | ||
146 | lock_sock(&rx->sk); | |
147 | ||
28036f44 DH |
148 | switch (rx->sk.sk_state) { |
149 | case RXRPC_UNBOUND: | |
150 | rx->srx = *srx; | |
151 | local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx); | |
152 | if (IS_ERR(local)) { | |
153 | ret = PTR_ERR(local); | |
154 | goto error_unlock; | |
155 | } | |
156 | ||
157 | if (service_id) { | |
158 | write_lock(&local->services_lock); | |
159 | if (rcu_access_pointer(local->service)) | |
160 | goto service_in_use; | |
161 | rx->local = local; | |
162 | rcu_assign_pointer(local->service, rx); | |
163 | write_unlock(&local->services_lock); | |
164 | ||
165 | rx->sk.sk_state = RXRPC_SERVER_BOUND; | |
166 | } else { | |
167 | rx->local = local; | |
168 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; | |
169 | } | |
170 | break; | |
17926a79 | 171 | |
28036f44 DH |
172 | case RXRPC_SERVER_BOUND: |
173 | ret = -EINVAL; | |
174 | if (service_id == 0) | |
175 | goto error_unlock; | |
176 | ret = -EADDRINUSE; | |
177 | if (service_id == rx->srx.srx_service) | |
178 | goto error_unlock; | |
179 | ret = -EINVAL; | |
180 | srx->srx_service = rx->srx.srx_service; | |
181 | if (memcmp(srx, &rx->srx, sizeof(*srx)) != 0) | |
182 | goto error_unlock; | |
183 | rx->second_service = service_id; | |
184 | rx->sk.sk_state = RXRPC_SERVER_BOUND2; | |
185 | break; | |
17926a79 | 186 | |
28036f44 DH |
187 | default: |
188 | ret = -EINVAL; | |
17926a79 DH |
189 | goto error_unlock; |
190 | } | |
191 | ||
17926a79 DH |
192 | release_sock(&rx->sk); |
193 | _leave(" = 0"); | |
194 | return 0; | |
195 | ||
196 | service_in_use: | |
248f219c | 197 | write_unlock(&local->services_lock); |
2341e077 DH |
198 | rxrpc_put_local(local); |
199 | ret = -EADDRINUSE; | |
17926a79 DH |
200 | error_unlock: |
201 | release_sock(&rx->sk); | |
202 | error: | |
203 | _leave(" = %d", ret); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | /* | |
208 | * set the number of pending calls permitted on a listening socket | |
209 | */ | |
210 | static int rxrpc_listen(struct socket *sock, int backlog) | |
211 | { | |
212 | struct sock *sk = sock->sk; | |
213 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
00e90712 | 214 | unsigned int max, old; |
17926a79 DH |
215 | int ret; |
216 | ||
217 | _enter("%p,%d", rx, backlog); | |
218 | ||
219 | lock_sock(&rx->sk); | |
220 | ||
221 | switch (rx->sk.sk_state) { | |
2341e077 | 222 | case RXRPC_UNBOUND: |
17926a79 DH |
223 | ret = -EADDRNOTAVAIL; |
224 | break; | |
17926a79 | 225 | case RXRPC_SERVER_BOUND: |
28036f44 | 226 | case RXRPC_SERVER_BOUND2: |
17926a79 | 227 | ASSERT(rx->local != NULL); |
0e119b41 DH |
228 | max = READ_ONCE(rxrpc_max_backlog); |
229 | ret = -EINVAL; | |
230 | if (backlog == INT_MAX) | |
231 | backlog = max; | |
232 | else if (backlog < 0 || backlog > max) | |
233 | break; | |
00e90712 | 234 | old = sk->sk_max_ack_backlog; |
17926a79 | 235 | sk->sk_max_ack_backlog = backlog; |
00e90712 DH |
236 | ret = rxrpc_service_prealloc(rx, GFP_KERNEL); |
237 | if (ret == 0) | |
238 | rx->sk.sk_state = RXRPC_SERVER_LISTENING; | |
239 | else | |
240 | sk->sk_max_ack_backlog = old; | |
17926a79 | 241 | break; |
210f0353 DH |
242 | case RXRPC_SERVER_LISTENING: |
243 | if (backlog == 0) { | |
244 | rx->sk.sk_state = RXRPC_SERVER_LISTEN_DISABLED; | |
245 | sk->sk_max_ack_backlog = 0; | |
246 | rxrpc_discard_prealloc(rx); | |
247 | ret = 0; | |
248 | break; | |
249 | } | |
e3cf3970 | 250 | /* Fall through */ |
0e119b41 DH |
251 | default: |
252 | ret = -EBUSY; | |
253 | break; | |
17926a79 DH |
254 | } |
255 | ||
256 | release_sock(&rx->sk); | |
257 | _leave(" = %d", ret); | |
258 | return ret; | |
259 | } | |
260 | ||
651350d1 DH |
261 | /** |
262 | * rxrpc_kernel_begin_call - Allow a kernel service to begin a call | |
263 | * @sock: The socket on which to make the call | |
2341e077 | 264 | * @srx: The address of the peer to contact |
651350d1 DH |
265 | * @key: The security context to use (defaults to socket setting) |
266 | * @user_call_ID: The ID to use | |
e754eba6 | 267 | * @tx_total_len: Total length of data to transmit during the call (or -1) |
d001648e DH |
268 | * @gfp: The allocation constraints |
269 | * @notify_rx: Where to send notifications instead of socket queue | |
a68f4a27 | 270 | * @upgrade: Request service upgrade for call |
a25e21f0 | 271 | * @debug_id: The debug ID for tracing to be assigned to the call |
651350d1 DH |
272 | * |
273 | * Allow a kernel service to begin a call on the nominated socket. This just | |
274 | * sets up all the internal tracking structures and allocates connection and | |
275 | * call IDs as appropriate. The call to be used is returned. | |
276 | * | |
277 | * The default socket destination address and security may be overridden by | |
278 | * supplying @srx and @key. | |
279 | */ | |
280 | struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, | |
281 | struct sockaddr_rxrpc *srx, | |
282 | struct key *key, | |
283 | unsigned long user_call_ID, | |
e754eba6 | 284 | s64 tx_total_len, |
d001648e | 285 | gfp_t gfp, |
a68f4a27 | 286 | rxrpc_notify_rx_t notify_rx, |
a25e21f0 DH |
287 | bool upgrade, |
288 | unsigned int debug_id) | |
651350d1 | 289 | { |
19ffa01c | 290 | struct rxrpc_conn_parameters cp; |
48124178 | 291 | struct rxrpc_call_params p; |
651350d1 DH |
292 | struct rxrpc_call *call; |
293 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
f4552c2d | 294 | int ret; |
651350d1 DH |
295 | |
296 | _enter(",,%x,%lx", key_serial(key), user_call_ID); | |
297 | ||
f4552c2d DH |
298 | ret = rxrpc_validate_address(rx, srx, sizeof(*srx)); |
299 | if (ret < 0) | |
300 | return ERR_PTR(ret); | |
301 | ||
651350d1 DH |
302 | lock_sock(&rx->sk); |
303 | ||
19ffa01c DH |
304 | if (!key) |
305 | key = rx->key; | |
306 | if (key && !key->payload.data[0]) | |
307 | key = NULL; /* a no-security key */ | |
308 | ||
48124178 DH |
309 | memset(&p, 0, sizeof(p)); |
310 | p.user_call_ID = user_call_ID; | |
311 | p.tx_total_len = tx_total_len; | |
312 | ||
19ffa01c DH |
313 | memset(&cp, 0, sizeof(cp)); |
314 | cp.local = rx->local; | |
315 | cp.key = key; | |
316 | cp.security_level = 0; | |
317 | cp.exclusive = false; | |
a68f4a27 | 318 | cp.upgrade = upgrade; |
19ffa01c | 319 | cp.service_id = srx->srx_service; |
a25e21f0 | 320 | call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id); |
540b1c48 | 321 | /* The socket has been unlocked. */ |
6cb3ece9 | 322 | if (!IS_ERR(call)) { |
d001648e | 323 | call->notify_rx = notify_rx; |
6cb3ece9 DH |
324 | mutex_unlock(&call->user_mutex); |
325 | } | |
19ffa01c | 326 | |
17226f12 | 327 | rxrpc_put_peer(cp.peer); |
651350d1 DH |
328 | _leave(" = %p", call); |
329 | return call; | |
330 | } | |
651350d1 DH |
331 | EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
332 | ||
20acbd9a DH |
333 | /* |
334 | * Dummy function used to stop the notifier talking to recvmsg(). | |
335 | */ | |
336 | static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall, | |
337 | unsigned long call_user_ID) | |
338 | { | |
339 | } | |
340 | ||
651350d1 DH |
341 | /** |
342 | * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using | |
4de48af6 | 343 | * @sock: The socket the call is on |
651350d1 DH |
344 | * @call: The call to end |
345 | * | |
346 | * Allow a kernel service to end a call it was using. The call must be | |
347 | * complete before this is called (the call should be aborted if necessary). | |
348 | */ | |
4de48af6 | 349 | void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call) |
651350d1 DH |
350 | { |
351 | _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); | |
540b1c48 DH |
352 | |
353 | mutex_lock(&call->user_mutex); | |
8d94aa38 | 354 | rxrpc_release_call(rxrpc_sk(sock->sk), call); |
20acbd9a DH |
355 | |
356 | /* Make sure we're not going to call back into a kernel service */ | |
357 | if (call->notify_rx) { | |
358 | spin_lock_bh(&call->notify_lock); | |
359 | call->notify_rx = rxrpc_dummy_notify_rx; | |
360 | spin_unlock_bh(&call->notify_lock); | |
361 | } | |
362 | ||
540b1c48 | 363 | mutex_unlock(&call->user_mutex); |
cbd00891 | 364 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
651350d1 | 365 | } |
651350d1 DH |
366 | EXPORT_SYMBOL(rxrpc_kernel_end_call); |
367 | ||
f4d15fb6 DH |
368 | /** |
369 | * rxrpc_kernel_check_life - Check to see whether a call is still alive | |
370 | * @sock: The socket the call is on | |
371 | * @call: The call to check | |
372 | * | |
373 | * Allow a kernel service to find out whether a call is still alive - ie. we're | |
374 | * getting ACKs from the server. Returns a number representing the life state | |
375 | * which can be compared to that returned by a previous call. | |
376 | * | |
377 | * If this is a client call, ping ACKs will be sent to the server to find out | |
378 | * whether it's still responsive and whether the call is still alive on the | |
379 | * server. | |
380 | */ | |
381 | u32 rxrpc_kernel_check_life(struct socket *sock, struct rxrpc_call *call) | |
382 | { | |
383 | return call->acks_latest; | |
384 | } | |
385 | EXPORT_SYMBOL(rxrpc_kernel_check_life); | |
386 | ||
c038a58c DH |
387 | /** |
388 | * rxrpc_kernel_check_call - Check a call's state | |
389 | * @sock: The socket the call is on | |
390 | * @call: The call to check | |
391 | * @_compl: Where to store the completion state | |
392 | * @_abort_code: Where to store any abort code | |
393 | * | |
394 | * Allow a kernel service to query the state of a call and find out the manner | |
395 | * of its termination if it has completed. Returns -EINPROGRESS if the call is | |
396 | * still going, 0 if the call finished successfully, -ECONNABORTED if the call | |
397 | * was aborted and an appropriate error if the call failed in some other way. | |
398 | */ | |
399 | int rxrpc_kernel_check_call(struct socket *sock, struct rxrpc_call *call, | |
400 | enum rxrpc_call_completion *_compl, u32 *_abort_code) | |
401 | { | |
402 | if (call->state != RXRPC_CALL_COMPLETE) | |
403 | return -EINPROGRESS; | |
404 | smp_rmb(); | |
405 | *_compl = call->completion; | |
406 | *_abort_code = call->abort_code; | |
407 | return call->error; | |
408 | } | |
409 | EXPORT_SYMBOL(rxrpc_kernel_check_call); | |
410 | ||
411 | /** | |
412 | * rxrpc_kernel_retry_call - Allow a kernel service to retry a call | |
413 | * @sock: The socket the call is on | |
414 | * @call: The call to retry | |
415 | * @srx: The address of the peer to contact | |
416 | * @key: The security context to use (defaults to socket setting) | |
417 | * | |
418 | * Allow a kernel service to try resending a client call that failed due to a | |
419 | * network error to a new address. The Tx queue is maintained intact, thereby | |
420 | * relieving the need to re-encrypt any request data that has already been | |
421 | * buffered. | |
422 | */ | |
423 | int rxrpc_kernel_retry_call(struct socket *sock, struct rxrpc_call *call, | |
424 | struct sockaddr_rxrpc *srx, struct key *key) | |
425 | { | |
426 | struct rxrpc_conn_parameters cp; | |
427 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
428 | int ret; | |
429 | ||
430 | _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); | |
431 | ||
432 | if (!key) | |
433 | key = rx->key; | |
434 | if (key && !key->payload.data[0]) | |
435 | key = NULL; /* a no-security key */ | |
436 | ||
437 | memset(&cp, 0, sizeof(cp)); | |
438 | cp.local = rx->local; | |
439 | cp.key = key; | |
440 | cp.security_level = 0; | |
441 | cp.exclusive = false; | |
442 | cp.service_id = srx->srx_service; | |
443 | ||
444 | mutex_lock(&call->user_mutex); | |
445 | ||
446 | ret = rxrpc_prepare_call_for_retry(rx, call); | |
447 | if (ret == 0) | |
448 | ret = rxrpc_retry_client_call(rx, call, &cp, srx, GFP_KERNEL); | |
449 | ||
450 | mutex_unlock(&call->user_mutex); | |
17226f12 | 451 | rxrpc_put_peer(cp.peer); |
c038a58c DH |
452 | _leave(" = %d", ret); |
453 | return ret; | |
454 | } | |
455 | EXPORT_SYMBOL(rxrpc_kernel_retry_call); | |
456 | ||
651350d1 | 457 | /** |
d001648e | 458 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
651350d1 | 459 | * @sock: The socket to intercept received messages on |
d001648e | 460 | * @notify_new_call: Function to be called when new calls appear |
00e90712 | 461 | * @discard_new_call: Function to discard preallocated calls |
651350d1 | 462 | * |
d001648e | 463 | * Allow a kernel service to be given notifications about new calls. |
651350d1 | 464 | */ |
d001648e DH |
465 | void rxrpc_kernel_new_call_notification( |
466 | struct socket *sock, | |
00e90712 DH |
467 | rxrpc_notify_new_call_t notify_new_call, |
468 | rxrpc_discard_new_call_t discard_new_call) | |
651350d1 DH |
469 | { |
470 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
471 | ||
d001648e | 472 | rx->notify_new_call = notify_new_call; |
00e90712 | 473 | rx->discard_new_call = discard_new_call; |
651350d1 | 474 | } |
d001648e | 475 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
651350d1 | 476 | |
17926a79 DH |
477 | /* |
478 | * connect an RxRPC socket | |
479 | * - this just targets it at a specific destination; no actual connection | |
480 | * negotiation takes place | |
481 | */ | |
482 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, | |
483 | int addr_len, int flags) | |
484 | { | |
2341e077 DH |
485 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
486 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
17926a79 DH |
487 | int ret; |
488 | ||
489 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); | |
490 | ||
491 | ret = rxrpc_validate_address(rx, srx, addr_len); | |
492 | if (ret < 0) { | |
493 | _leave(" = %d [bad addr]", ret); | |
494 | return ret; | |
495 | } | |
496 | ||
497 | lock_sock(&rx->sk); | |
498 | ||
2341e077 DH |
499 | ret = -EISCONN; |
500 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) | |
501 | goto error; | |
502 | ||
17926a79 | 503 | switch (rx->sk.sk_state) { |
2341e077 DH |
504 | case RXRPC_UNBOUND: |
505 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
506 | case RXRPC_CLIENT_UNBOUND: | |
17926a79 DH |
507 | case RXRPC_CLIENT_BOUND: |
508 | break; | |
17926a79 | 509 | default: |
2341e077 DH |
510 | ret = -EBUSY; |
511 | goto error; | |
17926a79 DH |
512 | } |
513 | ||
2341e077 DH |
514 | rx->connect_srx = *srx; |
515 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); | |
516 | ret = 0; | |
17926a79 | 517 | |
2341e077 | 518 | error: |
17926a79 | 519 | release_sock(&rx->sk); |
2341e077 | 520 | return ret; |
17926a79 DH |
521 | } |
522 | ||
523 | /* | |
524 | * send a message through an RxRPC socket | |
525 | * - in a client this does a number of things: | |
526 | * - finds/sets up a connection for the security specified (if any) | |
527 | * - initiates a call (ID in control data) | |
528 | * - ends the request phase of a call (if MSG_MORE is not set) | |
529 | * - sends a call data packet | |
530 | * - may send an abort (abort code in control data) | |
531 | */ | |
1b784140 | 532 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
17926a79 | 533 | { |
2341e077 | 534 | struct rxrpc_local *local; |
17926a79 DH |
535 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
536 | int ret; | |
537 | ||
538 | _enter(",{%d},,%zu", rx->sk.sk_state, len); | |
539 | ||
540 | if (m->msg_flags & MSG_OOB) | |
541 | return -EOPNOTSUPP; | |
542 | ||
543 | if (m->msg_name) { | |
544 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); | |
545 | if (ret < 0) { | |
546 | _leave(" = %d [bad addr]", ret); | |
547 | return ret; | |
548 | } | |
549 | } | |
550 | ||
17926a79 DH |
551 | lock_sock(&rx->sk); |
552 | ||
17926a79 | 553 | switch (rx->sk.sk_state) { |
2341e077 | 554 | case RXRPC_UNBOUND: |
cd5892c7 DH |
555 | rx->srx.srx_family = AF_RXRPC; |
556 | rx->srx.srx_service = 0; | |
557 | rx->srx.transport_type = SOCK_DGRAM; | |
558 | rx->srx.transport.family = rx->family; | |
559 | switch (rx->family) { | |
560 | case AF_INET: | |
561 | rx->srx.transport_len = sizeof(struct sockaddr_in); | |
562 | break; | |
d1912747 | 563 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
564 | case AF_INET6: |
565 | rx->srx.transport_len = sizeof(struct sockaddr_in6); | |
566 | break; | |
d1912747 | 567 | #endif |
cd5892c7 DH |
568 | default: |
569 | ret = -EAFNOSUPPORT; | |
570 | goto error_unlock; | |
571 | } | |
2baec2c3 | 572 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
2341e077 DH |
573 | if (IS_ERR(local)) { |
574 | ret = PTR_ERR(local); | |
575 | goto error_unlock; | |
17926a79 | 576 | } |
2341e077 DH |
577 | |
578 | rx->local = local; | |
579 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
580 | /* Fall through */ | |
581 | ||
582 | case RXRPC_CLIENT_UNBOUND: | |
17926a79 | 583 | case RXRPC_CLIENT_BOUND: |
2341e077 DH |
584 | if (!m->msg_name && |
585 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { | |
586 | m->msg_name = &rx->connect_srx; | |
587 | m->msg_namelen = sizeof(rx->connect_srx); | |
17926a79 | 588 | } |
e3cf3970 | 589 | /* Fall through */ |
2341e077 DH |
590 | case RXRPC_SERVER_BOUND: |
591 | case RXRPC_SERVER_LISTENING: | |
592 | ret = rxrpc_do_sendmsg(rx, m, len); | |
540b1c48 DH |
593 | /* The socket has been unlocked */ |
594 | goto out; | |
17926a79 | 595 | default: |
2341e077 | 596 | ret = -EINVAL; |
540b1c48 | 597 | goto error_unlock; |
17926a79 DH |
598 | } |
599 | ||
2341e077 | 600 | error_unlock: |
17926a79 | 601 | release_sock(&rx->sk); |
540b1c48 | 602 | out: |
17926a79 DH |
603 | _leave(" = %d", ret); |
604 | return ret; | |
605 | } | |
606 | ||
607 | /* | |
608 | * set RxRPC socket options | |
609 | */ | |
610 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 611 | char __user *optval, unsigned int optlen) |
17926a79 DH |
612 | { |
613 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
95c96174 | 614 | unsigned int min_sec_level; |
4722974d | 615 | u16 service_upgrade[2]; |
17926a79 DH |
616 | int ret; |
617 | ||
618 | _enter(",%d,%d,,%d", level, optname, optlen); | |
619 | ||
620 | lock_sock(&rx->sk); | |
621 | ret = -EOPNOTSUPP; | |
622 | ||
623 | if (level == SOL_RXRPC) { | |
624 | switch (optname) { | |
625 | case RXRPC_EXCLUSIVE_CONNECTION: | |
626 | ret = -EINVAL; | |
627 | if (optlen != 0) | |
628 | goto error; | |
629 | ret = -EISCONN; | |
2341e077 | 630 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 631 | goto error; |
cc8feb8e | 632 | rx->exclusive = true; |
17926a79 DH |
633 | goto success; |
634 | ||
635 | case RXRPC_SECURITY_KEY: | |
636 | ret = -EINVAL; | |
637 | if (rx->key) | |
638 | goto error; | |
639 | ret = -EISCONN; | |
2341e077 | 640 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
641 | goto error; |
642 | ret = rxrpc_request_key(rx, optval, optlen); | |
643 | goto error; | |
644 | ||
645 | case RXRPC_SECURITY_KEYRING: | |
646 | ret = -EINVAL; | |
647 | if (rx->key) | |
648 | goto error; | |
649 | ret = -EISCONN; | |
2341e077 | 650 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
651 | goto error; |
652 | ret = rxrpc_server_keyring(rx, optval, optlen); | |
653 | goto error; | |
654 | ||
655 | case RXRPC_MIN_SECURITY_LEVEL: | |
656 | ret = -EINVAL; | |
95c96174 | 657 | if (optlen != sizeof(unsigned int)) |
17926a79 DH |
658 | goto error; |
659 | ret = -EISCONN; | |
2341e077 | 660 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
661 | goto error; |
662 | ret = get_user(min_sec_level, | |
95c96174 | 663 | (unsigned int __user *) optval); |
17926a79 DH |
664 | if (ret < 0) |
665 | goto error; | |
666 | ret = -EINVAL; | |
667 | if (min_sec_level > RXRPC_SECURITY_MAX) | |
668 | goto error; | |
669 | rx->min_sec_level = min_sec_level; | |
670 | goto success; | |
671 | ||
4722974d DH |
672 | case RXRPC_UPGRADEABLE_SERVICE: |
673 | ret = -EINVAL; | |
674 | if (optlen != sizeof(service_upgrade) || | |
675 | rx->service_upgrade.from != 0) | |
676 | goto error; | |
677 | ret = -EISCONN; | |
678 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) | |
679 | goto error; | |
680 | ret = -EFAULT; | |
681 | if (copy_from_user(service_upgrade, optval, | |
682 | sizeof(service_upgrade)) != 0) | |
683 | goto error; | |
684 | ret = -EINVAL; | |
685 | if ((service_upgrade[0] != rx->srx.srx_service || | |
686 | service_upgrade[1] != rx->second_service) && | |
687 | (service_upgrade[0] != rx->second_service || | |
688 | service_upgrade[1] != rx->srx.srx_service)) | |
689 | goto error; | |
690 | rx->service_upgrade.from = service_upgrade[0]; | |
691 | rx->service_upgrade.to = service_upgrade[1]; | |
692 | goto success; | |
693 | ||
17926a79 DH |
694 | default: |
695 | break; | |
696 | } | |
697 | } | |
698 | ||
699 | success: | |
700 | ret = 0; | |
701 | error: | |
702 | release_sock(&rx->sk); | |
703 | return ret; | |
704 | } | |
705 | ||
515559ca DH |
706 | /* |
707 | * Get socket options. | |
708 | */ | |
709 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, | |
710 | char __user *optval, int __user *_optlen) | |
711 | { | |
712 | int optlen; | |
3ec0efde | 713 | |
515559ca DH |
714 | if (level != SOL_RXRPC) |
715 | return -EOPNOTSUPP; | |
716 | ||
717 | if (get_user(optlen, _optlen)) | |
718 | return -EFAULT; | |
3ec0efde | 719 | |
515559ca DH |
720 | switch (optname) { |
721 | case RXRPC_SUPPORTED_CMSG: | |
722 | if (optlen < sizeof(int)) | |
723 | return -ETOOSMALL; | |
724 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || | |
725 | put_user(sizeof(int), _optlen)) | |
726 | return -EFAULT; | |
727 | return 0; | |
3ec0efde | 728 | |
515559ca DH |
729 | default: |
730 | return -EOPNOTSUPP; | |
731 | } | |
732 | } | |
733 | ||
17926a79 DH |
734 | /* |
735 | * permit an RxRPC socket to be polled | |
736 | */ | |
ade994f4 | 737 | static __poll_t rxrpc_poll(struct file *file, struct socket *sock, |
17926a79 DH |
738 | poll_table *wait) |
739 | { | |
17926a79 | 740 | struct sock *sk = sock->sk; |
248f219c | 741 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
ade994f4 | 742 | __poll_t mask; |
17926a79 | 743 | |
aa395145 | 744 | sock_poll_wait(file, sk_sleep(sk), wait); |
17926a79 DH |
745 | mask = 0; |
746 | ||
747 | /* the socket is readable if there are any messages waiting on the Rx | |
748 | * queue */ | |
248f219c | 749 | if (!list_empty(&rx->recvmsg_q)) |
a9a08845 | 750 | mask |= EPOLLIN | EPOLLRDNORM; |
17926a79 DH |
751 | |
752 | /* the socket is writable if there is space to add new data to the | |
753 | * socket; there is no guarantee that any particular call in progress | |
754 | * on the socket may have space in the Tx ACK window */ | |
755 | if (rxrpc_writable(sk)) | |
a9a08845 | 756 | mask |= EPOLLOUT | EPOLLWRNORM; |
17926a79 DH |
757 | |
758 | return mask; | |
759 | } | |
760 | ||
761 | /* | |
762 | * create an RxRPC socket | |
763 | */ | |
3f378b68 EP |
764 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
765 | int kern) | |
17926a79 | 766 | { |
ace45bec | 767 | struct rxrpc_net *rxnet; |
17926a79 DH |
768 | struct rxrpc_sock *rx; |
769 | struct sock *sk; | |
770 | ||
771 | _enter("%p,%d", sock, protocol); | |
772 | ||
b4f1342f | 773 | /* we support transport protocol UDP/UDP6 only */ |
d1912747 DH |
774 | if (protocol != PF_INET && |
775 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) | |
17926a79 DH |
776 | return -EPROTONOSUPPORT; |
777 | ||
778 | if (sock->type != SOCK_DGRAM) | |
779 | return -ESOCKTNOSUPPORT; | |
780 | ||
781 | sock->ops = &rxrpc_rpc_ops; | |
782 | sock->state = SS_UNCONNECTED; | |
783 | ||
11aa9c28 | 784 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
17926a79 DH |
785 | if (!sk) |
786 | return -ENOMEM; | |
787 | ||
788 | sock_init_data(sock, sk); | |
8d94aa38 | 789 | sock_set_flag(sk, SOCK_RCU_FREE); |
2341e077 | 790 | sk->sk_state = RXRPC_UNBOUND; |
17926a79 | 791 | sk->sk_write_space = rxrpc_write_space; |
0e119b41 | 792 | sk->sk_max_ack_backlog = 0; |
17926a79 DH |
793 | sk->sk_destruct = rxrpc_sock_destructor; |
794 | ||
795 | rx = rxrpc_sk(sk); | |
19ffa01c | 796 | rx->family = protocol; |
17926a79 DH |
797 | rx->calls = RB_ROOT; |
798 | ||
248f219c DH |
799 | spin_lock_init(&rx->incoming_lock); |
800 | INIT_LIST_HEAD(&rx->sock_calls); | |
801 | INIT_LIST_HEAD(&rx->to_be_accepted); | |
802 | INIT_LIST_HEAD(&rx->recvmsg_q); | |
803 | rwlock_init(&rx->recvmsg_lock); | |
17926a79 DH |
804 | rwlock_init(&rx->call_lock); |
805 | memset(&rx->srx, 0, sizeof(rx->srx)); | |
806 | ||
ace45bec DH |
807 | rxnet = rxrpc_net(sock_net(&rx->sk)); |
808 | timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1); | |
809 | ||
17926a79 DH |
810 | _leave(" = 0 [%p]", rx); |
811 | return 0; | |
812 | } | |
813 | ||
248f219c DH |
814 | /* |
815 | * Kill all the calls on a socket and shut it down. | |
816 | */ | |
817 | static int rxrpc_shutdown(struct socket *sock, int flags) | |
818 | { | |
819 | struct sock *sk = sock->sk; | |
820 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
821 | int ret = 0; | |
822 | ||
823 | _enter("%p,%d", sk, flags); | |
824 | ||
825 | if (flags != SHUT_RDWR) | |
826 | return -EOPNOTSUPP; | |
827 | if (sk->sk_state == RXRPC_CLOSE) | |
828 | return -ESHUTDOWN; | |
829 | ||
830 | lock_sock(sk); | |
831 | ||
832 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
833 | if (sk->sk_state < RXRPC_CLOSE) { | |
834 | sk->sk_state = RXRPC_CLOSE; | |
835 | sk->sk_shutdown = SHUTDOWN_MASK; | |
836 | } else { | |
837 | ret = -ESHUTDOWN; | |
838 | } | |
839 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
840 | ||
841 | rxrpc_discard_prealloc(rx); | |
842 | ||
843 | release_sock(sk); | |
844 | return ret; | |
845 | } | |
846 | ||
17926a79 DH |
847 | /* |
848 | * RxRPC socket destructor | |
849 | */ | |
850 | static void rxrpc_sock_destructor(struct sock *sk) | |
851 | { | |
852 | _enter("%p", sk); | |
853 | ||
854 | rxrpc_purge_queue(&sk->sk_receive_queue); | |
855 | ||
14afee4b | 856 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
547b792c IJ |
857 | WARN_ON(!sk_unhashed(sk)); |
858 | WARN_ON(sk->sk_socket); | |
17926a79 DH |
859 | |
860 | if (!sock_flag(sk, SOCK_DEAD)) { | |
861 | printk("Attempt to release alive rxrpc socket: %p\n", sk); | |
862 | return; | |
863 | } | |
864 | } | |
865 | ||
866 | /* | |
867 | * release an RxRPC socket | |
868 | */ | |
869 | static int rxrpc_release_sock(struct sock *sk) | |
870 | { | |
871 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
c5012564 | 872 | struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk)); |
17926a79 | 873 | |
41c6d650 | 874 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
17926a79 DH |
875 | |
876 | /* declare the socket closed for business */ | |
877 | sock_orphan(sk); | |
878 | sk->sk_shutdown = SHUTDOWN_MASK; | |
879 | ||
f859ab61 DH |
880 | /* We want to kill off all connections from a service socket |
881 | * as fast as possible because we can't share these; client | |
882 | * sockets, on the other hand, can share an endpoint. | |
883 | */ | |
884 | switch (sk->sk_state) { | |
885 | case RXRPC_SERVER_BOUND: | |
886 | case RXRPC_SERVER_BOUND2: | |
887 | case RXRPC_SERVER_LISTENING: | |
888 | case RXRPC_SERVER_LISTEN_DISABLED: | |
889 | rx->local->service_closed = true; | |
890 | break; | |
891 | } | |
892 | ||
17926a79 DH |
893 | spin_lock_bh(&sk->sk_receive_queue.lock); |
894 | sk->sk_state = RXRPC_CLOSE; | |
895 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
896 | ||
b63452c1 | 897 | if (rx->local && rcu_access_pointer(rx->local->service) == rx) { |
248f219c | 898 | write_lock(&rx->local->services_lock); |
b63452c1 | 899 | rcu_assign_pointer(rx->local->service, NULL); |
248f219c | 900 | write_unlock(&rx->local->services_lock); |
17926a79 DH |
901 | } |
902 | ||
903 | /* try to flush out this socket */ | |
00e90712 | 904 | rxrpc_discard_prealloc(rx); |
17926a79 | 905 | rxrpc_release_calls_on_socket(rx); |
651350d1 | 906 | flush_workqueue(rxrpc_workqueue); |
17926a79 | 907 | rxrpc_purge_queue(&sk->sk_receive_queue); |
c5012564 DH |
908 | rxrpc_queue_work(&rxnet->service_conn_reaper); |
909 | rxrpc_queue_work(&rxnet->client_conn_reaper); | |
17926a79 | 910 | |
5627cc8b DH |
911 | rxrpc_put_local(rx->local); |
912 | rx->local = NULL; | |
17926a79 DH |
913 | key_put(rx->key); |
914 | rx->key = NULL; | |
915 | key_put(rx->securities); | |
916 | rx->securities = NULL; | |
917 | sock_put(sk); | |
918 | ||
919 | _leave(" = 0"); | |
920 | return 0; | |
921 | } | |
922 | ||
923 | /* | |
924 | * release an RxRPC BSD socket on close() or equivalent | |
925 | */ | |
926 | static int rxrpc_release(struct socket *sock) | |
927 | { | |
928 | struct sock *sk = sock->sk; | |
929 | ||
930 | _enter("%p{%p}", sock, sk); | |
931 | ||
932 | if (!sk) | |
933 | return 0; | |
934 | ||
935 | sock->sk = NULL; | |
936 | ||
937 | return rxrpc_release_sock(sk); | |
938 | } | |
939 | ||
940 | /* | |
941 | * RxRPC network protocol | |
942 | */ | |
943 | static const struct proto_ops rxrpc_rpc_ops = { | |
e33b3d97 | 944 | .family = PF_RXRPC, |
17926a79 DH |
945 | .owner = THIS_MODULE, |
946 | .release = rxrpc_release, | |
947 | .bind = rxrpc_bind, | |
948 | .connect = rxrpc_connect, | |
949 | .socketpair = sock_no_socketpair, | |
950 | .accept = sock_no_accept, | |
951 | .getname = sock_no_getname, | |
952 | .poll = rxrpc_poll, | |
953 | .ioctl = sock_no_ioctl, | |
954 | .listen = rxrpc_listen, | |
248f219c | 955 | .shutdown = rxrpc_shutdown, |
17926a79 | 956 | .setsockopt = rxrpc_setsockopt, |
515559ca | 957 | .getsockopt = rxrpc_getsockopt, |
17926a79 DH |
958 | .sendmsg = rxrpc_sendmsg, |
959 | .recvmsg = rxrpc_recvmsg, | |
960 | .mmap = sock_no_mmap, | |
961 | .sendpage = sock_no_sendpage, | |
962 | }; | |
963 | ||
964 | static struct proto rxrpc_proto = { | |
965 | .name = "RXRPC", | |
966 | .owner = THIS_MODULE, | |
967 | .obj_size = sizeof(struct rxrpc_sock), | |
0d12f8a4 | 968 | .max_header = sizeof(struct rxrpc_wire_header), |
17926a79 DH |
969 | }; |
970 | ||
ec1b4cf7 | 971 | static const struct net_proto_family rxrpc_family_ops = { |
17926a79 DH |
972 | .family = PF_RXRPC, |
973 | .create = rxrpc_create, | |
974 | .owner = THIS_MODULE, | |
975 | }; | |
976 | ||
977 | /* | |
978 | * initialise and register the RxRPC protocol | |
979 | */ | |
980 | static int __init af_rxrpc_init(void) | |
981 | { | |
17926a79 | 982 | int ret = -1; |
44430612 | 983 | unsigned int tmp; |
17926a79 | 984 | |
ce6654cf | 985 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb)); |
17926a79 | 986 | |
44430612 MW |
987 | get_random_bytes(&tmp, sizeof(tmp)); |
988 | tmp &= 0x3fffffff; | |
989 | if (tmp == 0) | |
990 | tmp = 1; | |
991 | idr_set_cursor(&rxrpc_client_conn_ids, tmp); | |
17926a79 | 992 | |
651350d1 | 993 | ret = -ENOMEM; |
17926a79 DH |
994 | rxrpc_call_jar = kmem_cache_create( |
995 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, | |
20c2df83 | 996 | SLAB_HWCACHE_ALIGN, NULL); |
17926a79 | 997 | if (!rxrpc_call_jar) { |
9b6d5398 | 998 | pr_notice("Failed to allocate call jar\n"); |
17926a79 DH |
999 | goto error_call_jar; |
1000 | } | |
1001 | ||
e1fcc7e2 | 1002 | rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1); |
651350d1 | 1003 | if (!rxrpc_workqueue) { |
9b6d5398 | 1004 | pr_notice("Failed to allocate work queue\n"); |
651350d1 DH |
1005 | goto error_work_queue; |
1006 | } | |
1007 | ||
648af7fc DH |
1008 | ret = rxrpc_init_security(); |
1009 | if (ret < 0) { | |
9b6d5398 | 1010 | pr_crit("Cannot initialise security\n"); |
648af7fc DH |
1011 | goto error_security; |
1012 | } | |
1013 | ||
2baec2c3 DH |
1014 | ret = register_pernet_subsys(&rxrpc_net_ops); |
1015 | if (ret) | |
1016 | goto error_pernet; | |
1017 | ||
17926a79 | 1018 | ret = proto_register(&rxrpc_proto, 1); |
1c899641 | 1019 | if (ret < 0) { |
9b6d5398 | 1020 | pr_crit("Cannot register protocol\n"); |
17926a79 DH |
1021 | goto error_proto; |
1022 | } | |
1023 | ||
1024 | ret = sock_register(&rxrpc_family_ops); | |
1025 | if (ret < 0) { | |
9b6d5398 | 1026 | pr_crit("Cannot register socket family\n"); |
17926a79 DH |
1027 | goto error_sock; |
1028 | } | |
1029 | ||
1030 | ret = register_key_type(&key_type_rxrpc); | |
1031 | if (ret < 0) { | |
9b6d5398 | 1032 | pr_crit("Cannot register client key type\n"); |
17926a79 DH |
1033 | goto error_key_type; |
1034 | } | |
1035 | ||
1036 | ret = register_key_type(&key_type_rxrpc_s); | |
1037 | if (ret < 0) { | |
9b6d5398 | 1038 | pr_crit("Cannot register server key type\n"); |
17926a79 DH |
1039 | goto error_key_type_s; |
1040 | } | |
1041 | ||
5873c083 DH |
1042 | ret = rxrpc_sysctl_init(); |
1043 | if (ret < 0) { | |
9b6d5398 | 1044 | pr_crit("Cannot register sysctls\n"); |
5873c083 DH |
1045 | goto error_sysctls; |
1046 | } | |
1047 | ||
17926a79 DH |
1048 | return 0; |
1049 | ||
5873c083 DH |
1050 | error_sysctls: |
1051 | unregister_key_type(&key_type_rxrpc_s); | |
17926a79 DH |
1052 | error_key_type_s: |
1053 | unregister_key_type(&key_type_rxrpc); | |
1054 | error_key_type: | |
1055 | sock_unregister(PF_RXRPC); | |
1056 | error_sock: | |
1057 | proto_unregister(&rxrpc_proto); | |
1058 | error_proto: | |
2baec2c3 DH |
1059 | unregister_pernet_subsys(&rxrpc_net_ops); |
1060 | error_pernet: | |
648af7fc | 1061 | rxrpc_exit_security(); |
8addc044 WY |
1062 | error_security: |
1063 | destroy_workqueue(rxrpc_workqueue); | |
651350d1 | 1064 | error_work_queue: |
17926a79 DH |
1065 | kmem_cache_destroy(rxrpc_call_jar); |
1066 | error_call_jar: | |
1067 | return ret; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * unregister the RxRPC protocol | |
1072 | */ | |
1073 | static void __exit af_rxrpc_exit(void) | |
1074 | { | |
1075 | _enter(""); | |
5873c083 | 1076 | rxrpc_sysctl_exit(); |
17926a79 DH |
1077 | unregister_key_type(&key_type_rxrpc_s); |
1078 | unregister_key_type(&key_type_rxrpc); | |
1079 | sock_unregister(PF_RXRPC); | |
1080 | proto_unregister(&rxrpc_proto); | |
2baec2c3 | 1081 | unregister_pernet_subsys(&rxrpc_net_ops); |
71f3ca40 DH |
1082 | ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0); |
1083 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); | |
4f95dd78 | 1084 | |
2baec2c3 DH |
1085 | /* Make sure the local and peer records pinned by any dying connections |
1086 | * are released. | |
1087 | */ | |
1088 | rcu_barrier(); | |
1089 | rxrpc_destroy_client_conn_ids(); | |
1090 | ||
651350d1 | 1091 | destroy_workqueue(rxrpc_workqueue); |
648af7fc | 1092 | rxrpc_exit_security(); |
17926a79 DH |
1093 | kmem_cache_destroy(rxrpc_call_jar); |
1094 | _leave(""); | |
1095 | } | |
1096 | ||
1097 | module_init(af_rxrpc_init); | |
1098 | module_exit(af_rxrpc_exit); |