Commit | Line | Data |
---|---|---|
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; |
48124178 | 288 | struct rxrpc_call_params p; |
651350d1 DH |
289 | struct rxrpc_call *call; |
290 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
f4552c2d | 291 | int ret; |
651350d1 DH |
292 | |
293 | _enter(",,%x,%lx", key_serial(key), user_call_ID); | |
294 | ||
f4552c2d DH |
295 | ret = rxrpc_validate_address(rx, srx, sizeof(*srx)); |
296 | if (ret < 0) | |
297 | return ERR_PTR(ret); | |
298 | ||
651350d1 DH |
299 | lock_sock(&rx->sk); |
300 | ||
19ffa01c DH |
301 | if (!key) |
302 | key = rx->key; | |
303 | if (key && !key->payload.data[0]) | |
304 | key = NULL; /* a no-security key */ | |
305 | ||
48124178 DH |
306 | memset(&p, 0, sizeof(p)); |
307 | p.user_call_ID = user_call_ID; | |
308 | p.tx_total_len = tx_total_len; | |
309 | ||
19ffa01c DH |
310 | memset(&cp, 0, sizeof(cp)); |
311 | cp.local = rx->local; | |
312 | cp.key = key; | |
313 | cp.security_level = 0; | |
314 | cp.exclusive = false; | |
a68f4a27 | 315 | cp.upgrade = upgrade; |
19ffa01c | 316 | cp.service_id = srx->srx_service; |
48124178 | 317 | call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp); |
540b1c48 | 318 | /* The socket has been unlocked. */ |
6cb3ece9 | 319 | if (!IS_ERR(call)) { |
d001648e | 320 | call->notify_rx = notify_rx; |
6cb3ece9 DH |
321 | mutex_unlock(&call->user_mutex); |
322 | } | |
19ffa01c | 323 | |
651350d1 DH |
324 | _leave(" = %p", call); |
325 | return call; | |
326 | } | |
651350d1 DH |
327 | EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
328 | ||
20acbd9a DH |
329 | /* |
330 | * Dummy function used to stop the notifier talking to recvmsg(). | |
331 | */ | |
332 | static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall, | |
333 | unsigned long call_user_ID) | |
334 | { | |
335 | } | |
336 | ||
651350d1 DH |
337 | /** |
338 | * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using | |
4de48af6 | 339 | * @sock: The socket the call is on |
651350d1 DH |
340 | * @call: The call to end |
341 | * | |
342 | * Allow a kernel service to end a call it was using. The call must be | |
343 | * complete before this is called (the call should be aborted if necessary). | |
344 | */ | |
4de48af6 | 345 | void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call) |
651350d1 DH |
346 | { |
347 | _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); | |
540b1c48 DH |
348 | |
349 | mutex_lock(&call->user_mutex); | |
8d94aa38 | 350 | rxrpc_release_call(rxrpc_sk(sock->sk), call); |
20acbd9a DH |
351 | |
352 | /* Make sure we're not going to call back into a kernel service */ | |
353 | if (call->notify_rx) { | |
354 | spin_lock_bh(&call->notify_lock); | |
355 | call->notify_rx = rxrpc_dummy_notify_rx; | |
356 | spin_unlock_bh(&call->notify_lock); | |
357 | } | |
358 | ||
540b1c48 | 359 | mutex_unlock(&call->user_mutex); |
cbd00891 | 360 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
651350d1 | 361 | } |
651350d1 DH |
362 | EXPORT_SYMBOL(rxrpc_kernel_end_call); |
363 | ||
f4d15fb6 DH |
364 | /** |
365 | * rxrpc_kernel_check_life - Check to see whether a call is still alive | |
366 | * @sock: The socket the call is on | |
367 | * @call: The call to check | |
368 | * | |
369 | * Allow a kernel service to find out whether a call is still alive - ie. we're | |
370 | * getting ACKs from the server. Returns a number representing the life state | |
371 | * which can be compared to that returned by a previous call. | |
372 | * | |
373 | * If this is a client call, ping ACKs will be sent to the server to find out | |
374 | * whether it's still responsive and whether the call is still alive on the | |
375 | * server. | |
376 | */ | |
377 | u32 rxrpc_kernel_check_life(struct socket *sock, struct rxrpc_call *call) | |
378 | { | |
379 | return call->acks_latest; | |
380 | } | |
381 | EXPORT_SYMBOL(rxrpc_kernel_check_life); | |
382 | ||
c038a58c DH |
383 | /** |
384 | * rxrpc_kernel_check_call - Check a call's state | |
385 | * @sock: The socket the call is on | |
386 | * @call: The call to check | |
387 | * @_compl: Where to store the completion state | |
388 | * @_abort_code: Where to store any abort code | |
389 | * | |
390 | * Allow a kernel service to query the state of a call and find out the manner | |
391 | * of its termination if it has completed. Returns -EINPROGRESS if the call is | |
392 | * still going, 0 if the call finished successfully, -ECONNABORTED if the call | |
393 | * was aborted and an appropriate error if the call failed in some other way. | |
394 | */ | |
395 | int rxrpc_kernel_check_call(struct socket *sock, struct rxrpc_call *call, | |
396 | enum rxrpc_call_completion *_compl, u32 *_abort_code) | |
397 | { | |
398 | if (call->state != RXRPC_CALL_COMPLETE) | |
399 | return -EINPROGRESS; | |
400 | smp_rmb(); | |
401 | *_compl = call->completion; | |
402 | *_abort_code = call->abort_code; | |
403 | return call->error; | |
404 | } | |
405 | EXPORT_SYMBOL(rxrpc_kernel_check_call); | |
406 | ||
407 | /** | |
408 | * rxrpc_kernel_retry_call - Allow a kernel service to retry a call | |
409 | * @sock: The socket the call is on | |
410 | * @call: The call to retry | |
411 | * @srx: The address of the peer to contact | |
412 | * @key: The security context to use (defaults to socket setting) | |
413 | * | |
414 | * Allow a kernel service to try resending a client call that failed due to a | |
415 | * network error to a new address. The Tx queue is maintained intact, thereby | |
416 | * relieving the need to re-encrypt any request data that has already been | |
417 | * buffered. | |
418 | */ | |
419 | int rxrpc_kernel_retry_call(struct socket *sock, struct rxrpc_call *call, | |
420 | struct sockaddr_rxrpc *srx, struct key *key) | |
421 | { | |
422 | struct rxrpc_conn_parameters cp; | |
423 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
424 | int ret; | |
425 | ||
426 | _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); | |
427 | ||
428 | if (!key) | |
429 | key = rx->key; | |
430 | if (key && !key->payload.data[0]) | |
431 | key = NULL; /* a no-security key */ | |
432 | ||
433 | memset(&cp, 0, sizeof(cp)); | |
434 | cp.local = rx->local; | |
435 | cp.key = key; | |
436 | cp.security_level = 0; | |
437 | cp.exclusive = false; | |
438 | cp.service_id = srx->srx_service; | |
439 | ||
440 | mutex_lock(&call->user_mutex); | |
441 | ||
442 | ret = rxrpc_prepare_call_for_retry(rx, call); | |
443 | if (ret == 0) | |
444 | ret = rxrpc_retry_client_call(rx, call, &cp, srx, GFP_KERNEL); | |
445 | ||
446 | mutex_unlock(&call->user_mutex); | |
447 | _leave(" = %d", ret); | |
448 | return ret; | |
449 | } | |
450 | EXPORT_SYMBOL(rxrpc_kernel_retry_call); | |
451 | ||
651350d1 | 452 | /** |
d001648e | 453 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
651350d1 | 454 | * @sock: The socket to intercept received messages on |
d001648e | 455 | * @notify_new_call: Function to be called when new calls appear |
00e90712 | 456 | * @discard_new_call: Function to discard preallocated calls |
651350d1 | 457 | * |
d001648e | 458 | * Allow a kernel service to be given notifications about new calls. |
651350d1 | 459 | */ |
d001648e DH |
460 | void rxrpc_kernel_new_call_notification( |
461 | struct socket *sock, | |
00e90712 DH |
462 | rxrpc_notify_new_call_t notify_new_call, |
463 | rxrpc_discard_new_call_t discard_new_call) | |
651350d1 DH |
464 | { |
465 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
466 | ||
d001648e | 467 | rx->notify_new_call = notify_new_call; |
00e90712 | 468 | rx->discard_new_call = discard_new_call; |
651350d1 | 469 | } |
d001648e | 470 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
651350d1 | 471 | |
17926a79 DH |
472 | /* |
473 | * connect an RxRPC socket | |
474 | * - this just targets it at a specific destination; no actual connection | |
475 | * negotiation takes place | |
476 | */ | |
477 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, | |
478 | int addr_len, int flags) | |
479 | { | |
2341e077 DH |
480 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
481 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
17926a79 DH |
482 | int ret; |
483 | ||
484 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); | |
485 | ||
486 | ret = rxrpc_validate_address(rx, srx, addr_len); | |
487 | if (ret < 0) { | |
488 | _leave(" = %d [bad addr]", ret); | |
489 | return ret; | |
490 | } | |
491 | ||
492 | lock_sock(&rx->sk); | |
493 | ||
2341e077 DH |
494 | ret = -EISCONN; |
495 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) | |
496 | goto error; | |
497 | ||
17926a79 | 498 | switch (rx->sk.sk_state) { |
2341e077 DH |
499 | case RXRPC_UNBOUND: |
500 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
501 | case RXRPC_CLIENT_UNBOUND: | |
17926a79 DH |
502 | case RXRPC_CLIENT_BOUND: |
503 | break; | |
17926a79 | 504 | default: |
2341e077 DH |
505 | ret = -EBUSY; |
506 | goto error; | |
17926a79 DH |
507 | } |
508 | ||
2341e077 DH |
509 | rx->connect_srx = *srx; |
510 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); | |
511 | ret = 0; | |
17926a79 | 512 | |
2341e077 | 513 | error: |
17926a79 | 514 | release_sock(&rx->sk); |
2341e077 | 515 | return ret; |
17926a79 DH |
516 | } |
517 | ||
518 | /* | |
519 | * send a message through an RxRPC socket | |
520 | * - in a client this does a number of things: | |
521 | * - finds/sets up a connection for the security specified (if any) | |
522 | * - initiates a call (ID in control data) | |
523 | * - ends the request phase of a call (if MSG_MORE is not set) | |
524 | * - sends a call data packet | |
525 | * - may send an abort (abort code in control data) | |
526 | */ | |
1b784140 | 527 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
17926a79 | 528 | { |
2341e077 | 529 | struct rxrpc_local *local; |
17926a79 DH |
530 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
531 | int ret; | |
532 | ||
533 | _enter(",{%d},,%zu", rx->sk.sk_state, len); | |
534 | ||
535 | if (m->msg_flags & MSG_OOB) | |
536 | return -EOPNOTSUPP; | |
537 | ||
538 | if (m->msg_name) { | |
539 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); | |
540 | if (ret < 0) { | |
541 | _leave(" = %d [bad addr]", ret); | |
542 | return ret; | |
543 | } | |
544 | } | |
545 | ||
17926a79 DH |
546 | lock_sock(&rx->sk); |
547 | ||
17926a79 | 548 | switch (rx->sk.sk_state) { |
2341e077 | 549 | case RXRPC_UNBOUND: |
cd5892c7 DH |
550 | rx->srx.srx_family = AF_RXRPC; |
551 | rx->srx.srx_service = 0; | |
552 | rx->srx.transport_type = SOCK_DGRAM; | |
553 | rx->srx.transport.family = rx->family; | |
554 | switch (rx->family) { | |
555 | case AF_INET: | |
556 | rx->srx.transport_len = sizeof(struct sockaddr_in); | |
557 | break; | |
d1912747 | 558 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
559 | case AF_INET6: |
560 | rx->srx.transport_len = sizeof(struct sockaddr_in6); | |
561 | break; | |
d1912747 | 562 | #endif |
cd5892c7 DH |
563 | default: |
564 | ret = -EAFNOSUPPORT; | |
565 | goto error_unlock; | |
566 | } | |
2baec2c3 | 567 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
2341e077 DH |
568 | if (IS_ERR(local)) { |
569 | ret = PTR_ERR(local); | |
570 | goto error_unlock; | |
17926a79 | 571 | } |
2341e077 DH |
572 | |
573 | rx->local = local; | |
574 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
575 | /* Fall through */ | |
576 | ||
577 | case RXRPC_CLIENT_UNBOUND: | |
17926a79 | 578 | case RXRPC_CLIENT_BOUND: |
2341e077 DH |
579 | if (!m->msg_name && |
580 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { | |
581 | m->msg_name = &rx->connect_srx; | |
582 | m->msg_namelen = sizeof(rx->connect_srx); | |
17926a79 | 583 | } |
e3cf3970 | 584 | /* Fall through */ |
2341e077 DH |
585 | case RXRPC_SERVER_BOUND: |
586 | case RXRPC_SERVER_LISTENING: | |
587 | ret = rxrpc_do_sendmsg(rx, m, len); | |
540b1c48 DH |
588 | /* The socket has been unlocked */ |
589 | goto out; | |
17926a79 | 590 | default: |
2341e077 | 591 | ret = -EINVAL; |
540b1c48 | 592 | goto error_unlock; |
17926a79 DH |
593 | } |
594 | ||
2341e077 | 595 | error_unlock: |
17926a79 | 596 | release_sock(&rx->sk); |
540b1c48 | 597 | out: |
17926a79 DH |
598 | _leave(" = %d", ret); |
599 | return ret; | |
600 | } | |
601 | ||
602 | /* | |
603 | * set RxRPC socket options | |
604 | */ | |
605 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 606 | char __user *optval, unsigned int optlen) |
17926a79 DH |
607 | { |
608 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
95c96174 | 609 | unsigned int min_sec_level; |
4722974d | 610 | u16 service_upgrade[2]; |
17926a79 DH |
611 | int ret; |
612 | ||
613 | _enter(",%d,%d,,%d", level, optname, optlen); | |
614 | ||
615 | lock_sock(&rx->sk); | |
616 | ret = -EOPNOTSUPP; | |
617 | ||
618 | if (level == SOL_RXRPC) { | |
619 | switch (optname) { | |
620 | case RXRPC_EXCLUSIVE_CONNECTION: | |
621 | ret = -EINVAL; | |
622 | if (optlen != 0) | |
623 | goto error; | |
624 | ret = -EISCONN; | |
2341e077 | 625 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 626 | goto error; |
cc8feb8e | 627 | rx->exclusive = true; |
17926a79 DH |
628 | goto success; |
629 | ||
630 | case RXRPC_SECURITY_KEY: | |
631 | ret = -EINVAL; | |
632 | if (rx->key) | |
633 | goto error; | |
634 | ret = -EISCONN; | |
2341e077 | 635 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
636 | goto error; |
637 | ret = rxrpc_request_key(rx, optval, optlen); | |
638 | goto error; | |
639 | ||
640 | case RXRPC_SECURITY_KEYRING: | |
641 | ret = -EINVAL; | |
642 | if (rx->key) | |
643 | goto error; | |
644 | ret = -EISCONN; | |
2341e077 | 645 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
646 | goto error; |
647 | ret = rxrpc_server_keyring(rx, optval, optlen); | |
648 | goto error; | |
649 | ||
650 | case RXRPC_MIN_SECURITY_LEVEL: | |
651 | ret = -EINVAL; | |
95c96174 | 652 | if (optlen != sizeof(unsigned int)) |
17926a79 DH |
653 | goto error; |
654 | ret = -EISCONN; | |
2341e077 | 655 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
656 | goto error; |
657 | ret = get_user(min_sec_level, | |
95c96174 | 658 | (unsigned int __user *) optval); |
17926a79 DH |
659 | if (ret < 0) |
660 | goto error; | |
661 | ret = -EINVAL; | |
662 | if (min_sec_level > RXRPC_SECURITY_MAX) | |
663 | goto error; | |
664 | rx->min_sec_level = min_sec_level; | |
665 | goto success; | |
666 | ||
4722974d DH |
667 | case RXRPC_UPGRADEABLE_SERVICE: |
668 | ret = -EINVAL; | |
669 | if (optlen != sizeof(service_upgrade) || | |
670 | rx->service_upgrade.from != 0) | |
671 | goto error; | |
672 | ret = -EISCONN; | |
673 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) | |
674 | goto error; | |
675 | ret = -EFAULT; | |
676 | if (copy_from_user(service_upgrade, optval, | |
677 | sizeof(service_upgrade)) != 0) | |
678 | goto error; | |
679 | ret = -EINVAL; | |
680 | if ((service_upgrade[0] != rx->srx.srx_service || | |
681 | service_upgrade[1] != rx->second_service) && | |
682 | (service_upgrade[0] != rx->second_service || | |
683 | service_upgrade[1] != rx->srx.srx_service)) | |
684 | goto error; | |
685 | rx->service_upgrade.from = service_upgrade[0]; | |
686 | rx->service_upgrade.to = service_upgrade[1]; | |
687 | goto success; | |
688 | ||
17926a79 DH |
689 | default: |
690 | break; | |
691 | } | |
692 | } | |
693 | ||
694 | success: | |
695 | ret = 0; | |
696 | error: | |
697 | release_sock(&rx->sk); | |
698 | return ret; | |
699 | } | |
700 | ||
515559ca DH |
701 | /* |
702 | * Get socket options. | |
703 | */ | |
704 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, | |
705 | char __user *optval, int __user *_optlen) | |
706 | { | |
707 | int optlen; | |
3ec0efde | 708 | |
515559ca DH |
709 | if (level != SOL_RXRPC) |
710 | return -EOPNOTSUPP; | |
711 | ||
712 | if (get_user(optlen, _optlen)) | |
713 | return -EFAULT; | |
3ec0efde | 714 | |
515559ca DH |
715 | switch (optname) { |
716 | case RXRPC_SUPPORTED_CMSG: | |
717 | if (optlen < sizeof(int)) | |
718 | return -ETOOSMALL; | |
719 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || | |
720 | put_user(sizeof(int), _optlen)) | |
721 | return -EFAULT; | |
722 | return 0; | |
3ec0efde | 723 | |
515559ca DH |
724 | default: |
725 | return -EOPNOTSUPP; | |
726 | } | |
727 | } | |
728 | ||
17926a79 DH |
729 | /* |
730 | * permit an RxRPC socket to be polled | |
731 | */ | |
ade994f4 | 732 | static __poll_t rxrpc_poll(struct file *file, struct socket *sock, |
17926a79 DH |
733 | poll_table *wait) |
734 | { | |
17926a79 | 735 | struct sock *sk = sock->sk; |
248f219c | 736 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
ade994f4 | 737 | __poll_t mask; |
17926a79 | 738 | |
aa395145 | 739 | sock_poll_wait(file, sk_sleep(sk), wait); |
17926a79 DH |
740 | mask = 0; |
741 | ||
742 | /* the socket is readable if there are any messages waiting on the Rx | |
743 | * queue */ | |
248f219c | 744 | if (!list_empty(&rx->recvmsg_q)) |
a9a08845 | 745 | mask |= EPOLLIN | EPOLLRDNORM; |
17926a79 DH |
746 | |
747 | /* the socket is writable if there is space to add new data to the | |
748 | * socket; there is no guarantee that any particular call in progress | |
749 | * on the socket may have space in the Tx ACK window */ | |
750 | if (rxrpc_writable(sk)) | |
a9a08845 | 751 | mask |= EPOLLOUT | EPOLLWRNORM; |
17926a79 DH |
752 | |
753 | return mask; | |
754 | } | |
755 | ||
756 | /* | |
757 | * create an RxRPC socket | |
758 | */ | |
3f378b68 EP |
759 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
760 | int kern) | |
17926a79 DH |
761 | { |
762 | struct rxrpc_sock *rx; | |
763 | struct sock *sk; | |
764 | ||
765 | _enter("%p,%d", sock, protocol); | |
766 | ||
b4f1342f | 767 | /* we support transport protocol UDP/UDP6 only */ |
d1912747 DH |
768 | if (protocol != PF_INET && |
769 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) | |
17926a79 DH |
770 | return -EPROTONOSUPPORT; |
771 | ||
772 | if (sock->type != SOCK_DGRAM) | |
773 | return -ESOCKTNOSUPPORT; | |
774 | ||
775 | sock->ops = &rxrpc_rpc_ops; | |
776 | sock->state = SS_UNCONNECTED; | |
777 | ||
11aa9c28 | 778 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
17926a79 DH |
779 | if (!sk) |
780 | return -ENOMEM; | |
781 | ||
782 | sock_init_data(sock, sk); | |
8d94aa38 | 783 | sock_set_flag(sk, SOCK_RCU_FREE); |
2341e077 | 784 | sk->sk_state = RXRPC_UNBOUND; |
17926a79 | 785 | sk->sk_write_space = rxrpc_write_space; |
0e119b41 | 786 | sk->sk_max_ack_backlog = 0; |
17926a79 DH |
787 | sk->sk_destruct = rxrpc_sock_destructor; |
788 | ||
789 | rx = rxrpc_sk(sk); | |
19ffa01c | 790 | rx->family = protocol; |
17926a79 DH |
791 | rx->calls = RB_ROOT; |
792 | ||
248f219c DH |
793 | spin_lock_init(&rx->incoming_lock); |
794 | INIT_LIST_HEAD(&rx->sock_calls); | |
795 | INIT_LIST_HEAD(&rx->to_be_accepted); | |
796 | INIT_LIST_HEAD(&rx->recvmsg_q); | |
797 | rwlock_init(&rx->recvmsg_lock); | |
17926a79 DH |
798 | rwlock_init(&rx->call_lock); |
799 | memset(&rx->srx, 0, sizeof(rx->srx)); | |
800 | ||
801 | _leave(" = 0 [%p]", rx); | |
802 | return 0; | |
803 | } | |
804 | ||
248f219c DH |
805 | /* |
806 | * Kill all the calls on a socket and shut it down. | |
807 | */ | |
808 | static int rxrpc_shutdown(struct socket *sock, int flags) | |
809 | { | |
810 | struct sock *sk = sock->sk; | |
811 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
812 | int ret = 0; | |
813 | ||
814 | _enter("%p,%d", sk, flags); | |
815 | ||
816 | if (flags != SHUT_RDWR) | |
817 | return -EOPNOTSUPP; | |
818 | if (sk->sk_state == RXRPC_CLOSE) | |
819 | return -ESHUTDOWN; | |
820 | ||
821 | lock_sock(sk); | |
822 | ||
823 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
824 | if (sk->sk_state < RXRPC_CLOSE) { | |
825 | sk->sk_state = RXRPC_CLOSE; | |
826 | sk->sk_shutdown = SHUTDOWN_MASK; | |
827 | } else { | |
828 | ret = -ESHUTDOWN; | |
829 | } | |
830 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
831 | ||
832 | rxrpc_discard_prealloc(rx); | |
833 | ||
834 | release_sock(sk); | |
835 | return ret; | |
836 | } | |
837 | ||
17926a79 DH |
838 | /* |
839 | * RxRPC socket destructor | |
840 | */ | |
841 | static void rxrpc_sock_destructor(struct sock *sk) | |
842 | { | |
843 | _enter("%p", sk); | |
844 | ||
845 | rxrpc_purge_queue(&sk->sk_receive_queue); | |
846 | ||
14afee4b | 847 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
547b792c IJ |
848 | WARN_ON(!sk_unhashed(sk)); |
849 | WARN_ON(sk->sk_socket); | |
17926a79 DH |
850 | |
851 | if (!sock_flag(sk, SOCK_DEAD)) { | |
852 | printk("Attempt to release alive rxrpc socket: %p\n", sk); | |
853 | return; | |
854 | } | |
855 | } | |
856 | ||
857 | /* | |
858 | * release an RxRPC socket | |
859 | */ | |
860 | static int rxrpc_release_sock(struct sock *sk) | |
861 | { | |
862 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
c5012564 | 863 | struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk)); |
17926a79 | 864 | |
41c6d650 | 865 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
17926a79 DH |
866 | |
867 | /* declare the socket closed for business */ | |
868 | sock_orphan(sk); | |
869 | sk->sk_shutdown = SHUTDOWN_MASK; | |
870 | ||
f859ab61 DH |
871 | /* We want to kill off all connections from a service socket |
872 | * as fast as possible because we can't share these; client | |
873 | * sockets, on the other hand, can share an endpoint. | |
874 | */ | |
875 | switch (sk->sk_state) { | |
876 | case RXRPC_SERVER_BOUND: | |
877 | case RXRPC_SERVER_BOUND2: | |
878 | case RXRPC_SERVER_LISTENING: | |
879 | case RXRPC_SERVER_LISTEN_DISABLED: | |
880 | rx->local->service_closed = true; | |
881 | break; | |
882 | } | |
883 | ||
17926a79 DH |
884 | spin_lock_bh(&sk->sk_receive_queue.lock); |
885 | sk->sk_state = RXRPC_CLOSE; | |
886 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
887 | ||
b63452c1 | 888 | if (rx->local && rcu_access_pointer(rx->local->service) == rx) { |
248f219c | 889 | write_lock(&rx->local->services_lock); |
b63452c1 | 890 | rcu_assign_pointer(rx->local->service, NULL); |
248f219c | 891 | write_unlock(&rx->local->services_lock); |
17926a79 DH |
892 | } |
893 | ||
894 | /* try to flush out this socket */ | |
00e90712 | 895 | rxrpc_discard_prealloc(rx); |
17926a79 | 896 | rxrpc_release_calls_on_socket(rx); |
651350d1 | 897 | flush_workqueue(rxrpc_workqueue); |
17926a79 | 898 | rxrpc_purge_queue(&sk->sk_receive_queue); |
c5012564 DH |
899 | rxrpc_queue_work(&rxnet->service_conn_reaper); |
900 | rxrpc_queue_work(&rxnet->client_conn_reaper); | |
17926a79 | 901 | |
5627cc8b DH |
902 | rxrpc_put_local(rx->local); |
903 | rx->local = NULL; | |
17926a79 DH |
904 | key_put(rx->key); |
905 | rx->key = NULL; | |
906 | key_put(rx->securities); | |
907 | rx->securities = NULL; | |
908 | sock_put(sk); | |
909 | ||
910 | _leave(" = 0"); | |
911 | return 0; | |
912 | } | |
913 | ||
914 | /* | |
915 | * release an RxRPC BSD socket on close() or equivalent | |
916 | */ | |
917 | static int rxrpc_release(struct socket *sock) | |
918 | { | |
919 | struct sock *sk = sock->sk; | |
920 | ||
921 | _enter("%p{%p}", sock, sk); | |
922 | ||
923 | if (!sk) | |
924 | return 0; | |
925 | ||
926 | sock->sk = NULL; | |
927 | ||
928 | return rxrpc_release_sock(sk); | |
929 | } | |
930 | ||
931 | /* | |
932 | * RxRPC network protocol | |
933 | */ | |
934 | static const struct proto_ops rxrpc_rpc_ops = { | |
e33b3d97 | 935 | .family = PF_RXRPC, |
17926a79 DH |
936 | .owner = THIS_MODULE, |
937 | .release = rxrpc_release, | |
938 | .bind = rxrpc_bind, | |
939 | .connect = rxrpc_connect, | |
940 | .socketpair = sock_no_socketpair, | |
941 | .accept = sock_no_accept, | |
942 | .getname = sock_no_getname, | |
943 | .poll = rxrpc_poll, | |
944 | .ioctl = sock_no_ioctl, | |
945 | .listen = rxrpc_listen, | |
248f219c | 946 | .shutdown = rxrpc_shutdown, |
17926a79 | 947 | .setsockopt = rxrpc_setsockopt, |
515559ca | 948 | .getsockopt = rxrpc_getsockopt, |
17926a79 DH |
949 | .sendmsg = rxrpc_sendmsg, |
950 | .recvmsg = rxrpc_recvmsg, | |
951 | .mmap = sock_no_mmap, | |
952 | .sendpage = sock_no_sendpage, | |
953 | }; | |
954 | ||
955 | static struct proto rxrpc_proto = { | |
956 | .name = "RXRPC", | |
957 | .owner = THIS_MODULE, | |
958 | .obj_size = sizeof(struct rxrpc_sock), | |
0d12f8a4 | 959 | .max_header = sizeof(struct rxrpc_wire_header), |
17926a79 DH |
960 | }; |
961 | ||
ec1b4cf7 | 962 | static const struct net_proto_family rxrpc_family_ops = { |
17926a79 DH |
963 | .family = PF_RXRPC, |
964 | .create = rxrpc_create, | |
965 | .owner = THIS_MODULE, | |
966 | }; | |
967 | ||
968 | /* | |
969 | * initialise and register the RxRPC protocol | |
970 | */ | |
971 | static int __init af_rxrpc_init(void) | |
972 | { | |
17926a79 | 973 | int ret = -1; |
44430612 | 974 | unsigned int tmp; |
17926a79 | 975 | |
ce6654cf | 976 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb)); |
17926a79 | 977 | |
44430612 MW |
978 | get_random_bytes(&tmp, sizeof(tmp)); |
979 | tmp &= 0x3fffffff; | |
980 | if (tmp == 0) | |
981 | tmp = 1; | |
982 | idr_set_cursor(&rxrpc_client_conn_ids, tmp); | |
17926a79 | 983 | |
651350d1 | 984 | ret = -ENOMEM; |
17926a79 DH |
985 | rxrpc_call_jar = kmem_cache_create( |
986 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, | |
20c2df83 | 987 | SLAB_HWCACHE_ALIGN, NULL); |
17926a79 | 988 | if (!rxrpc_call_jar) { |
9b6d5398 | 989 | pr_notice("Failed to allocate call jar\n"); |
17926a79 DH |
990 | goto error_call_jar; |
991 | } | |
992 | ||
e1fcc7e2 | 993 | rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1); |
651350d1 | 994 | if (!rxrpc_workqueue) { |
9b6d5398 | 995 | pr_notice("Failed to allocate work queue\n"); |
651350d1 DH |
996 | goto error_work_queue; |
997 | } | |
998 | ||
648af7fc DH |
999 | ret = rxrpc_init_security(); |
1000 | if (ret < 0) { | |
9b6d5398 | 1001 | pr_crit("Cannot initialise security\n"); |
648af7fc DH |
1002 | goto error_security; |
1003 | } | |
1004 | ||
2baec2c3 DH |
1005 | ret = register_pernet_subsys(&rxrpc_net_ops); |
1006 | if (ret) | |
1007 | goto error_pernet; | |
1008 | ||
17926a79 | 1009 | ret = proto_register(&rxrpc_proto, 1); |
1c899641 | 1010 | if (ret < 0) { |
9b6d5398 | 1011 | pr_crit("Cannot register protocol\n"); |
17926a79 DH |
1012 | goto error_proto; |
1013 | } | |
1014 | ||
1015 | ret = sock_register(&rxrpc_family_ops); | |
1016 | if (ret < 0) { | |
9b6d5398 | 1017 | pr_crit("Cannot register socket family\n"); |
17926a79 DH |
1018 | goto error_sock; |
1019 | } | |
1020 | ||
1021 | ret = register_key_type(&key_type_rxrpc); | |
1022 | if (ret < 0) { | |
9b6d5398 | 1023 | pr_crit("Cannot register client key type\n"); |
17926a79 DH |
1024 | goto error_key_type; |
1025 | } | |
1026 | ||
1027 | ret = register_key_type(&key_type_rxrpc_s); | |
1028 | if (ret < 0) { | |
9b6d5398 | 1029 | pr_crit("Cannot register server key type\n"); |
17926a79 DH |
1030 | goto error_key_type_s; |
1031 | } | |
1032 | ||
5873c083 DH |
1033 | ret = rxrpc_sysctl_init(); |
1034 | if (ret < 0) { | |
9b6d5398 | 1035 | pr_crit("Cannot register sysctls\n"); |
5873c083 DH |
1036 | goto error_sysctls; |
1037 | } | |
1038 | ||
17926a79 DH |
1039 | return 0; |
1040 | ||
5873c083 DH |
1041 | error_sysctls: |
1042 | unregister_key_type(&key_type_rxrpc_s); | |
17926a79 DH |
1043 | error_key_type_s: |
1044 | unregister_key_type(&key_type_rxrpc); | |
1045 | error_key_type: | |
1046 | sock_unregister(PF_RXRPC); | |
1047 | error_sock: | |
1048 | proto_unregister(&rxrpc_proto); | |
1049 | error_proto: | |
2baec2c3 DH |
1050 | unregister_pernet_subsys(&rxrpc_net_ops); |
1051 | error_pernet: | |
648af7fc | 1052 | rxrpc_exit_security(); |
8addc044 WY |
1053 | error_security: |
1054 | destroy_workqueue(rxrpc_workqueue); | |
651350d1 | 1055 | error_work_queue: |
17926a79 DH |
1056 | kmem_cache_destroy(rxrpc_call_jar); |
1057 | error_call_jar: | |
1058 | return ret; | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * unregister the RxRPC protocol | |
1063 | */ | |
1064 | static void __exit af_rxrpc_exit(void) | |
1065 | { | |
1066 | _enter(""); | |
5873c083 | 1067 | rxrpc_sysctl_exit(); |
17926a79 DH |
1068 | unregister_key_type(&key_type_rxrpc_s); |
1069 | unregister_key_type(&key_type_rxrpc); | |
1070 | sock_unregister(PF_RXRPC); | |
1071 | proto_unregister(&rxrpc_proto); | |
2baec2c3 | 1072 | unregister_pernet_subsys(&rxrpc_net_ops); |
71f3ca40 DH |
1073 | ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0); |
1074 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); | |
4f95dd78 | 1075 | |
2baec2c3 DH |
1076 | /* Make sure the local and peer records pinned by any dying connections |
1077 | * are released. | |
1078 | */ | |
1079 | rcu_barrier(); | |
1080 | rxrpc_destroy_client_conn_ids(); | |
1081 | ||
651350d1 | 1082 | destroy_workqueue(rxrpc_workqueue); |
648af7fc | 1083 | rxrpc_exit_security(); |
17926a79 DH |
1084 | kmem_cache_destroy(rxrpc_call_jar); |
1085 | _leave(""); | |
1086 | } | |
1087 | ||
1088 | module_init(af_rxrpc_init); | |
1089 | module_exit(af_rxrpc_exit); |