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