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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
17926a79 DH |
2 | /* AF_RXRPC implementation |
3 | * | |
4 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
17926a79 DH |
6 | */ |
7 | ||
9b6d5398 JP |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
9 | ||
17926a79 | 10 | #include <linux/module.h> |
ce6654cf | 11 | #include <linux/kernel.h> |
17926a79 | 12 | #include <linux/net.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
17926a79 | 14 | #include <linux/skbuff.h> |
5f2d9c44 | 15 | #include <linux/random.h> |
17926a79 DH |
16 | #include <linux/poll.h> |
17 | #include <linux/proc_fs.h> | |
76181c13 | 18 | #include <linux/key-type.h> |
457c4cbc | 19 | #include <net/net_namespace.h> |
17926a79 DH |
20 | #include <net/sock.h> |
21 | #include <net/af_rxrpc.h> | |
df844fd4 | 22 | #define CREATE_TRACE_POINTS |
17926a79 DH |
23 | #include "ar-internal.h" |
24 | ||
25 | MODULE_DESCRIPTION("RxRPC network protocol"); | |
26 | MODULE_AUTHOR("Red Hat, Inc."); | |
27 | MODULE_LICENSE("GPL"); | |
28 | MODULE_ALIAS_NETPROTO(PF_RXRPC); | |
29 | ||
95c96174 | 30 | unsigned int rxrpc_debug; // = RXRPC_DEBUG_KPROTO; |
d6444062 | 31 | module_param_named(debug, rxrpc_debug, uint, 0644); |
424b00e2 | 32 | MODULE_PARM_DESC(debug, "RxRPC debugging mask"); |
17926a79 | 33 | |
17926a79 DH |
34 | static struct proto rxrpc_proto; |
35 | static const struct proto_ops rxrpc_rpc_ops; | |
36 | ||
17926a79 DH |
37 | /* current debugging ID */ |
38 | atomic_t rxrpc_debug_id; | |
a25e21f0 | 39 | EXPORT_SYMBOL(rxrpc_debug_id); |
17926a79 DH |
40 | |
41 | /* count of skbs currently in use */ | |
a4ea4c47 | 42 | atomic_t rxrpc_n_rx_skbs; |
17926a79 | 43 | |
651350d1 DH |
44 | struct workqueue_struct *rxrpc_workqueue; |
45 | ||
17926a79 DH |
46 | static void rxrpc_sock_destructor(struct sock *); |
47 | ||
48 | /* | |
49 | * see if an RxRPC socket is currently writable | |
50 | */ | |
51 | static inline int rxrpc_writable(struct sock *sk) | |
52 | { | |
14afee4b | 53 | return refcount_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf; |
17926a79 DH |
54 | } |
55 | ||
56 | /* | |
57 | * wait for write bufferage to become available | |
58 | */ | |
59 | static void rxrpc_write_space(struct sock *sk) | |
60 | { | |
61 | _enter("%p", sk); | |
43815482 | 62 | rcu_read_lock(); |
17926a79 | 63 | if (rxrpc_writable(sk)) { |
43815482 ED |
64 | struct socket_wq *wq = rcu_dereference(sk->sk_wq); |
65 | ||
1ce0bf50 | 66 | if (skwq_has_sleeper(wq)) |
43815482 | 67 | wake_up_interruptible(&wq->wait); |
8d8ad9d7 | 68 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
17926a79 | 69 | } |
43815482 | 70 | rcu_read_unlock(); |
17926a79 DH |
71 | } |
72 | ||
73 | /* | |
74 | * validate an RxRPC address | |
75 | */ | |
76 | static int rxrpc_validate_address(struct rxrpc_sock *rx, | |
77 | struct sockaddr_rxrpc *srx, | |
78 | int len) | |
79 | { | |
dad8aff7 | 80 | unsigned int tail; |
ab802ee0 | 81 | |
17926a79 DH |
82 | if (len < sizeof(struct sockaddr_rxrpc)) |
83 | return -EINVAL; | |
84 | ||
85 | if (srx->srx_family != AF_RXRPC) | |
86 | return -EAFNOSUPPORT; | |
87 | ||
88 | if (srx->transport_type != SOCK_DGRAM) | |
89 | return -ESOCKTNOSUPPORT; | |
90 | ||
91 | len -= offsetof(struct sockaddr_rxrpc, transport); | |
92 | if (srx->transport_len < sizeof(sa_family_t) || | |
93 | srx->transport_len > len) | |
94 | return -EINVAL; | |
95 | ||
17926a79 DH |
96 | switch (srx->transport.family) { |
97 | case AF_INET: | |
66f6fd27 DH |
98 | if (rx->family != AF_INET && |
99 | rx->family != AF_INET6) | |
100 | return -EAFNOSUPPORT; | |
4f95dd78 DH |
101 | if (srx->transport_len < sizeof(struct sockaddr_in)) |
102 | return -EINVAL; | |
ab802ee0 | 103 | tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad); |
17926a79 DH |
104 | break; |
105 | ||
d1912747 | 106 | #ifdef CONFIG_AF_RXRPC_IPV6 |
17926a79 | 107 | case AF_INET6: |
66f6fd27 DH |
108 | if (rx->family != AF_INET6) |
109 | return -EAFNOSUPPORT; | |
75b54cb5 DH |
110 | if (srx->transport_len < sizeof(struct sockaddr_in6)) |
111 | return -EINVAL; | |
112 | tail = offsetof(struct sockaddr_rxrpc, transport) + | |
113 | sizeof(struct sockaddr_in6); | |
114 | break; | |
d1912747 | 115 | #endif |
75b54cb5 | 116 | |
17926a79 DH |
117 | default: |
118 | return -EAFNOSUPPORT; | |
119 | } | |
120 | ||
ab802ee0 DH |
121 | if (tail < len) |
122 | memset((void *)srx + tail, 0, len - tail); | |
75b54cb5 | 123 | _debug("INET: %pISp", &srx->transport); |
17926a79 DH |
124 | return 0; |
125 | } | |
126 | ||
127 | /* | |
128 | * bind a local address to an RxRPC socket | |
129 | */ | |
130 | static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len) | |
131 | { | |
b4f1342f | 132 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr; |
17926a79 | 133 | struct rxrpc_local *local; |
68d6d1ae | 134 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
a9107a14 | 135 | u16 service_id; |
17926a79 DH |
136 | int ret; |
137 | ||
138 | _enter("%p,%p,%d", rx, saddr, len); | |
139 | ||
140 | ret = rxrpc_validate_address(rx, srx, len); | |
141 | if (ret < 0) | |
142 | goto error; | |
a9107a14 | 143 | service_id = srx->srx_service; |
17926a79 DH |
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); |
0fde882f DH |
197 | rxrpc_unuse_local(local, rxrpc_local_unuse_bind); |
198 | rxrpc_put_local(local, rxrpc_local_put_bind); | |
2341e077 | 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 | } | |
df561f66 | 250 | fallthrough; |
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 |
76f2fe73 | 271 | * @interruptibility: The call is interruptible, or can be canceled. |
a25e21f0 | 272 | * @debug_id: The debug ID for tracing to be assigned to the call |
651350d1 DH |
273 | * |
274 | * Allow a kernel service to begin a call on the nominated socket. This just | |
275 | * sets up all the internal tracking structures and allocates connection and | |
276 | * call IDs as appropriate. The call to be used is returned. | |
277 | * | |
278 | * The default socket destination address and security may be overridden by | |
279 | * supplying @srx and @key. | |
280 | */ | |
281 | struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, | |
282 | struct sockaddr_rxrpc *srx, | |
283 | struct key *key, | |
284 | unsigned long user_call_ID, | |
e754eba6 | 285 | s64 tx_total_len, |
d001648e | 286 | gfp_t gfp, |
a68f4a27 | 287 | rxrpc_notify_rx_t notify_rx, |
a25e21f0 | 288 | bool upgrade, |
e138aa7d | 289 | enum rxrpc_interruptibility interruptibility, |
a25e21f0 | 290 | unsigned int debug_id) |
651350d1 | 291 | { |
19ffa01c | 292 | struct rxrpc_conn_parameters cp; |
48124178 | 293 | struct rxrpc_call_params p; |
651350d1 DH |
294 | struct rxrpc_call *call; |
295 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
f4552c2d | 296 | int ret; |
651350d1 DH |
297 | |
298 | _enter(",,%x,%lx", key_serial(key), user_call_ID); | |
299 | ||
f4552c2d DH |
300 | ret = rxrpc_validate_address(rx, srx, sizeof(*srx)); |
301 | if (ret < 0) | |
302 | return ERR_PTR(ret); | |
303 | ||
651350d1 DH |
304 | lock_sock(&rx->sk); |
305 | ||
19ffa01c DH |
306 | if (!key) |
307 | key = rx->key; | |
308 | if (key && !key->payload.data[0]) | |
309 | key = NULL; /* a no-security key */ | |
310 | ||
48124178 | 311 | memset(&p, 0, sizeof(p)); |
b7a7d674 DH |
312 | p.user_call_ID = user_call_ID; |
313 | p.tx_total_len = tx_total_len; | |
314 | p.interruptibility = interruptibility; | |
315 | p.kernel = true; | |
48124178 | 316 | |
19ffa01c DH |
317 | memset(&cp, 0, sizeof(cp)); |
318 | cp.local = rx->local; | |
319 | cp.key = key; | |
93864fc3 | 320 | cp.security_level = rx->min_sec_level; |
19ffa01c | 321 | cp.exclusive = false; |
a68f4a27 | 322 | cp.upgrade = upgrade; |
19ffa01c | 323 | cp.service_id = srx->srx_service; |
a25e21f0 | 324 | call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id); |
540b1c48 | 325 | /* The socket has been unlocked. */ |
6cb3ece9 | 326 | if (!IS_ERR(call)) { |
d001648e | 327 | call->notify_rx = notify_rx; |
6cb3ece9 DH |
328 | mutex_unlock(&call->user_mutex); |
329 | } | |
19ffa01c | 330 | |
47c810a7 | 331 | rxrpc_put_peer(cp.peer, rxrpc_peer_put_discard_tmp); |
651350d1 DH |
332 | _leave(" = %p", call); |
333 | return call; | |
334 | } | |
651350d1 DH |
335 | EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
336 | ||
20acbd9a DH |
337 | /* |
338 | * Dummy function used to stop the notifier talking to recvmsg(). | |
339 | */ | |
340 | static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall, | |
341 | unsigned long call_user_ID) | |
342 | { | |
343 | } | |
344 | ||
651350d1 DH |
345 | /** |
346 | * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using | |
4de48af6 | 347 | * @sock: The socket the call is on |
651350d1 DH |
348 | * @call: The call to end |
349 | * | |
350 | * Allow a kernel service to end a call it was using. The call must be | |
351 | * complete before this is called (the call should be aborted if necessary). | |
352 | */ | |
4de48af6 | 353 | void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call) |
651350d1 | 354 | { |
a0575429 | 355 | _enter("%d{%d}", call->debug_id, refcount_read(&call->ref)); |
540b1c48 DH |
356 | |
357 | mutex_lock(&call->user_mutex); | |
8d94aa38 | 358 | rxrpc_release_call(rxrpc_sk(sock->sk), call); |
20acbd9a DH |
359 | |
360 | /* Make sure we're not going to call back into a kernel service */ | |
361 | if (call->notify_rx) { | |
3dd9c8b5 | 362 | spin_lock(&call->notify_lock); |
20acbd9a | 363 | call->notify_rx = rxrpc_dummy_notify_rx; |
3dd9c8b5 | 364 | spin_unlock(&call->notify_lock); |
20acbd9a DH |
365 | } |
366 | ||
540b1c48 | 367 | mutex_unlock(&call->user_mutex); |
cbd00891 | 368 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
651350d1 | 369 | } |
651350d1 DH |
370 | EXPORT_SYMBOL(rxrpc_kernel_end_call); |
371 | ||
f4d15fb6 DH |
372 | /** |
373 | * rxrpc_kernel_check_life - Check to see whether a call is still alive | |
374 | * @sock: The socket the call is on | |
375 | * @call: The call to check | |
376 | * | |
7d7587db DH |
377 | * Allow a kernel service to find out whether a call is still alive - |
378 | * ie. whether it has completed. | |
f4d15fb6 | 379 | */ |
4611da30 | 380 | bool rxrpc_kernel_check_life(const struct socket *sock, |
7d7587db | 381 | const struct rxrpc_call *call) |
f4d15fb6 | 382 | { |
4611da30 | 383 | return call->state != RXRPC_CALL_COMPLETE; |
f4d15fb6 DH |
384 | } |
385 | EXPORT_SYMBOL(rxrpc_kernel_check_life); | |
386 | ||
e908bcf4 DH |
387 | /** |
388 | * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call. | |
389 | * @sock: The socket the call is on | |
390 | * @call: The call to query | |
391 | * | |
392 | * Allow a kernel service to retrieve the epoch value from a service call to | |
393 | * see if the client at the other end rebooted. | |
394 | */ | |
395 | u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call) | |
396 | { | |
397 | return call->conn->proto.epoch; | |
398 | } | |
399 | EXPORT_SYMBOL(rxrpc_kernel_get_epoch); | |
400 | ||
651350d1 | 401 | /** |
d001648e | 402 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
651350d1 | 403 | * @sock: The socket to intercept received messages on |
d001648e | 404 | * @notify_new_call: Function to be called when new calls appear |
00e90712 | 405 | * @discard_new_call: Function to discard preallocated calls |
651350d1 | 406 | * |
d001648e | 407 | * Allow a kernel service to be given notifications about new calls. |
651350d1 | 408 | */ |
d001648e DH |
409 | void rxrpc_kernel_new_call_notification( |
410 | struct socket *sock, | |
00e90712 DH |
411 | rxrpc_notify_new_call_t notify_new_call, |
412 | rxrpc_discard_new_call_t discard_new_call) | |
651350d1 DH |
413 | { |
414 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
415 | ||
d001648e | 416 | rx->notify_new_call = notify_new_call; |
00e90712 | 417 | rx->discard_new_call = discard_new_call; |
651350d1 | 418 | } |
d001648e | 419 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
651350d1 | 420 | |
bbd172e3 DH |
421 | /** |
422 | * rxrpc_kernel_set_max_life - Set maximum lifespan on a call | |
423 | * @sock: The socket the call is on | |
424 | * @call: The call to configure | |
425 | * @hard_timeout: The maximum lifespan of the call in jiffies | |
426 | * | |
427 | * Set the maximum lifespan of a call. The call will end with ETIME or | |
428 | * ETIMEDOUT if it takes longer than this. | |
429 | */ | |
430 | void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call, | |
431 | unsigned long hard_timeout) | |
432 | { | |
433 | unsigned long now; | |
434 | ||
435 | mutex_lock(&call->user_mutex); | |
436 | ||
437 | now = jiffies; | |
438 | hard_timeout += now; | |
439 | WRITE_ONCE(call->expect_term_by, hard_timeout); | |
440 | rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard); | |
441 | ||
442 | mutex_unlock(&call->user_mutex); | |
443 | } | |
444 | EXPORT_SYMBOL(rxrpc_kernel_set_max_life); | |
445 | ||
17926a79 DH |
446 | /* |
447 | * connect an RxRPC socket | |
448 | * - this just targets it at a specific destination; no actual connection | |
449 | * negotiation takes place | |
450 | */ | |
451 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, | |
452 | int addr_len, int flags) | |
453 | { | |
2341e077 DH |
454 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
455 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
17926a79 DH |
456 | int ret; |
457 | ||
458 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); | |
459 | ||
460 | ret = rxrpc_validate_address(rx, srx, addr_len); | |
461 | if (ret < 0) { | |
462 | _leave(" = %d [bad addr]", ret); | |
463 | return ret; | |
464 | } | |
465 | ||
466 | lock_sock(&rx->sk); | |
467 | ||
2341e077 DH |
468 | ret = -EISCONN; |
469 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) | |
470 | goto error; | |
471 | ||
17926a79 | 472 | switch (rx->sk.sk_state) { |
2341e077 DH |
473 | case RXRPC_UNBOUND: |
474 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
40e67c12 | 475 | break; |
2341e077 | 476 | case RXRPC_CLIENT_UNBOUND: |
17926a79 DH |
477 | case RXRPC_CLIENT_BOUND: |
478 | break; | |
17926a79 | 479 | default: |
2341e077 DH |
480 | ret = -EBUSY; |
481 | goto error; | |
17926a79 DH |
482 | } |
483 | ||
2341e077 DH |
484 | rx->connect_srx = *srx; |
485 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); | |
486 | ret = 0; | |
17926a79 | 487 | |
2341e077 | 488 | error: |
17926a79 | 489 | release_sock(&rx->sk); |
2341e077 | 490 | return ret; |
17926a79 DH |
491 | } |
492 | ||
493 | /* | |
494 | * send a message through an RxRPC socket | |
495 | * - in a client this does a number of things: | |
496 | * - finds/sets up a connection for the security specified (if any) | |
497 | * - initiates a call (ID in control data) | |
498 | * - ends the request phase of a call (if MSG_MORE is not set) | |
499 | * - sends a call data packet | |
500 | * - may send an abort (abort code in control data) | |
501 | */ | |
1b784140 | 502 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
17926a79 | 503 | { |
2341e077 | 504 | struct rxrpc_local *local; |
17926a79 DH |
505 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
506 | int ret; | |
507 | ||
508 | _enter(",{%d},,%zu", rx->sk.sk_state, len); | |
509 | ||
510 | if (m->msg_flags & MSG_OOB) | |
511 | return -EOPNOTSUPP; | |
512 | ||
513 | if (m->msg_name) { | |
514 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); | |
515 | if (ret < 0) { | |
516 | _leave(" = %d [bad addr]", ret); | |
517 | return ret; | |
518 | } | |
519 | } | |
520 | ||
17926a79 DH |
521 | lock_sock(&rx->sk); |
522 | ||
17926a79 | 523 | switch (rx->sk.sk_state) { |
2341e077 | 524 | case RXRPC_UNBOUND: |
e835ada0 | 525 | case RXRPC_CLIENT_UNBOUND: |
cd5892c7 DH |
526 | rx->srx.srx_family = AF_RXRPC; |
527 | rx->srx.srx_service = 0; | |
528 | rx->srx.transport_type = SOCK_DGRAM; | |
529 | rx->srx.transport.family = rx->family; | |
530 | switch (rx->family) { | |
531 | case AF_INET: | |
532 | rx->srx.transport_len = sizeof(struct sockaddr_in); | |
533 | break; | |
d1912747 | 534 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
535 | case AF_INET6: |
536 | rx->srx.transport_len = sizeof(struct sockaddr_in6); | |
537 | break; | |
d1912747 | 538 | #endif |
cd5892c7 DH |
539 | default: |
540 | ret = -EAFNOSUPPORT; | |
541 | goto error_unlock; | |
542 | } | |
2baec2c3 | 543 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
2341e077 DH |
544 | if (IS_ERR(local)) { |
545 | ret = PTR_ERR(local); | |
546 | goto error_unlock; | |
17926a79 | 547 | } |
2341e077 DH |
548 | |
549 | rx->local = local; | |
e835ada0 | 550 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; |
df561f66 | 551 | fallthrough; |
2341e077 | 552 | |
17926a79 | 553 | case RXRPC_CLIENT_BOUND: |
2341e077 DH |
554 | if (!m->msg_name && |
555 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { | |
556 | m->msg_name = &rx->connect_srx; | |
557 | m->msg_namelen = sizeof(rx->connect_srx); | |
17926a79 | 558 | } |
df561f66 | 559 | fallthrough; |
2341e077 DH |
560 | case RXRPC_SERVER_BOUND: |
561 | case RXRPC_SERVER_LISTENING: | |
562 | ret = rxrpc_do_sendmsg(rx, m, len); | |
540b1c48 DH |
563 | /* The socket has been unlocked */ |
564 | goto out; | |
17926a79 | 565 | default: |
2341e077 | 566 | ret = -EINVAL; |
540b1c48 | 567 | goto error_unlock; |
17926a79 DH |
568 | } |
569 | ||
2341e077 | 570 | error_unlock: |
17926a79 | 571 | release_sock(&rx->sk); |
540b1c48 | 572 | out: |
17926a79 DH |
573 | _leave(" = %d", ret); |
574 | return ret; | |
575 | } | |
576 | ||
298cd88a CH |
577 | int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val) |
578 | { | |
579 | if (sk->sk_state != RXRPC_UNBOUND) | |
580 | return -EISCONN; | |
581 | if (val > RXRPC_SECURITY_MAX) | |
582 | return -EINVAL; | |
583 | lock_sock(sk); | |
584 | rxrpc_sk(sk)->min_sec_level = val; | |
585 | release_sock(sk); | |
586 | return 0; | |
587 | } | |
588 | EXPORT_SYMBOL(rxrpc_sock_set_min_security_level); | |
589 | ||
17926a79 DH |
590 | /* |
591 | * set RxRPC socket options | |
592 | */ | |
593 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, | |
a7b75c5a | 594 | sockptr_t optval, unsigned int optlen) |
17926a79 DH |
595 | { |
596 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
95c96174 | 597 | unsigned int min_sec_level; |
4722974d | 598 | u16 service_upgrade[2]; |
17926a79 DH |
599 | int ret; |
600 | ||
601 | _enter(",%d,%d,,%d", level, optname, optlen); | |
602 | ||
603 | lock_sock(&rx->sk); | |
604 | ret = -EOPNOTSUPP; | |
605 | ||
606 | if (level == SOL_RXRPC) { | |
607 | switch (optname) { | |
608 | case RXRPC_EXCLUSIVE_CONNECTION: | |
609 | ret = -EINVAL; | |
610 | if (optlen != 0) | |
611 | goto error; | |
612 | ret = -EISCONN; | |
2341e077 | 613 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 614 | goto error; |
cc8feb8e | 615 | rx->exclusive = true; |
17926a79 DH |
616 | goto success; |
617 | ||
618 | case RXRPC_SECURITY_KEY: | |
619 | ret = -EINVAL; | |
620 | if (rx->key) | |
621 | goto error; | |
622 | ret = -EISCONN; | |
2341e077 | 623 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
624 | goto error; |
625 | ret = rxrpc_request_key(rx, optval, optlen); | |
626 | goto error; | |
627 | ||
628 | case RXRPC_SECURITY_KEYRING: | |
629 | ret = -EINVAL; | |
630 | if (rx->key) | |
631 | goto error; | |
632 | ret = -EISCONN; | |
2341e077 | 633 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
634 | goto error; |
635 | ret = rxrpc_server_keyring(rx, optval, optlen); | |
636 | goto error; | |
637 | ||
638 | case RXRPC_MIN_SECURITY_LEVEL: | |
639 | ret = -EINVAL; | |
95c96174 | 640 | if (optlen != sizeof(unsigned int)) |
17926a79 DH |
641 | goto error; |
642 | ret = -EISCONN; | |
2341e077 | 643 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 644 | goto error; |
a7b75c5a CH |
645 | ret = copy_from_sockptr(&min_sec_level, optval, |
646 | sizeof(unsigned int)); | |
17926a79 DH |
647 | if (ret < 0) |
648 | goto error; | |
649 | ret = -EINVAL; | |
650 | if (min_sec_level > RXRPC_SECURITY_MAX) | |
651 | goto error; | |
652 | rx->min_sec_level = min_sec_level; | |
653 | goto success; | |
654 | ||
4722974d DH |
655 | case RXRPC_UPGRADEABLE_SERVICE: |
656 | ret = -EINVAL; | |
657 | if (optlen != sizeof(service_upgrade) || | |
658 | rx->service_upgrade.from != 0) | |
659 | goto error; | |
660 | ret = -EISCONN; | |
661 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) | |
662 | goto error; | |
663 | ret = -EFAULT; | |
a7b75c5a | 664 | if (copy_from_sockptr(service_upgrade, optval, |
4722974d DH |
665 | sizeof(service_upgrade)) != 0) |
666 | goto error; | |
667 | ret = -EINVAL; | |
668 | if ((service_upgrade[0] != rx->srx.srx_service || | |
669 | service_upgrade[1] != rx->second_service) && | |
670 | (service_upgrade[0] != rx->second_service || | |
671 | service_upgrade[1] != rx->srx.srx_service)) | |
672 | goto error; | |
673 | rx->service_upgrade.from = service_upgrade[0]; | |
674 | rx->service_upgrade.to = service_upgrade[1]; | |
675 | goto success; | |
676 | ||
17926a79 DH |
677 | default: |
678 | break; | |
679 | } | |
680 | } | |
681 | ||
682 | success: | |
683 | ret = 0; | |
684 | error: | |
685 | release_sock(&rx->sk); | |
686 | return ret; | |
687 | } | |
688 | ||
515559ca DH |
689 | /* |
690 | * Get socket options. | |
691 | */ | |
692 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, | |
693 | char __user *optval, int __user *_optlen) | |
694 | { | |
695 | int optlen; | |
3ec0efde | 696 | |
515559ca DH |
697 | if (level != SOL_RXRPC) |
698 | return -EOPNOTSUPP; | |
699 | ||
700 | if (get_user(optlen, _optlen)) | |
701 | return -EFAULT; | |
3ec0efde | 702 | |
515559ca DH |
703 | switch (optname) { |
704 | case RXRPC_SUPPORTED_CMSG: | |
705 | if (optlen < sizeof(int)) | |
706 | return -ETOOSMALL; | |
707 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || | |
708 | put_user(sizeof(int), _optlen)) | |
709 | return -EFAULT; | |
710 | return 0; | |
3ec0efde | 711 | |
515559ca DH |
712 | default: |
713 | return -EOPNOTSUPP; | |
714 | } | |
715 | } | |
716 | ||
17926a79 DH |
717 | /* |
718 | * permit an RxRPC socket to be polled | |
719 | */ | |
a11e1d43 LT |
720 | static __poll_t rxrpc_poll(struct file *file, struct socket *sock, |
721 | poll_table *wait) | |
17926a79 | 722 | { |
17926a79 | 723 | struct sock *sk = sock->sk; |
248f219c | 724 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
a11e1d43 LT |
725 | __poll_t mask; |
726 | ||
89ab066d | 727 | sock_poll_wait(file, sock, wait); |
a11e1d43 | 728 | mask = 0; |
17926a79 DH |
729 | |
730 | /* the socket is readable if there are any messages waiting on the Rx | |
731 | * queue */ | |
248f219c | 732 | if (!list_empty(&rx->recvmsg_q)) |
a9a08845 | 733 | mask |= EPOLLIN | EPOLLRDNORM; |
17926a79 DH |
734 | |
735 | /* the socket is writable if there is space to add new data to the | |
736 | * socket; there is no guarantee that any particular call in progress | |
737 | * on the socket may have space in the Tx ACK window */ | |
738 | if (rxrpc_writable(sk)) | |
a9a08845 | 739 | mask |= EPOLLOUT | EPOLLWRNORM; |
17926a79 DH |
740 | |
741 | return mask; | |
742 | } | |
743 | ||
744 | /* | |
745 | * create an RxRPC socket | |
746 | */ | |
3f378b68 EP |
747 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
748 | int kern) | |
17926a79 | 749 | { |
ace45bec | 750 | struct rxrpc_net *rxnet; |
17926a79 DH |
751 | struct rxrpc_sock *rx; |
752 | struct sock *sk; | |
753 | ||
754 | _enter("%p,%d", sock, protocol); | |
755 | ||
b4f1342f | 756 | /* we support transport protocol UDP/UDP6 only */ |
d1912747 DH |
757 | if (protocol != PF_INET && |
758 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) | |
17926a79 DH |
759 | return -EPROTONOSUPPORT; |
760 | ||
761 | if (sock->type != SOCK_DGRAM) | |
762 | return -ESOCKTNOSUPPORT; | |
763 | ||
764 | sock->ops = &rxrpc_rpc_ops; | |
765 | sock->state = SS_UNCONNECTED; | |
766 | ||
11aa9c28 | 767 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
17926a79 DH |
768 | if (!sk) |
769 | return -ENOMEM; | |
770 | ||
771 | sock_init_data(sock, sk); | |
8d94aa38 | 772 | sock_set_flag(sk, SOCK_RCU_FREE); |
2341e077 | 773 | sk->sk_state = RXRPC_UNBOUND; |
17926a79 | 774 | sk->sk_write_space = rxrpc_write_space; |
0e119b41 | 775 | sk->sk_max_ack_backlog = 0; |
17926a79 DH |
776 | sk->sk_destruct = rxrpc_sock_destructor; |
777 | ||
778 | rx = rxrpc_sk(sk); | |
19ffa01c | 779 | rx->family = protocol; |
17926a79 DH |
780 | rx->calls = RB_ROOT; |
781 | ||
248f219c DH |
782 | spin_lock_init(&rx->incoming_lock); |
783 | INIT_LIST_HEAD(&rx->sock_calls); | |
784 | INIT_LIST_HEAD(&rx->to_be_accepted); | |
785 | INIT_LIST_HEAD(&rx->recvmsg_q); | |
786 | rwlock_init(&rx->recvmsg_lock); | |
17926a79 DH |
787 | rwlock_init(&rx->call_lock); |
788 | memset(&rx->srx, 0, sizeof(rx->srx)); | |
789 | ||
ace45bec DH |
790 | rxnet = rxrpc_net(sock_net(&rx->sk)); |
791 | timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1); | |
792 | ||
17926a79 DH |
793 | _leave(" = 0 [%p]", rx); |
794 | return 0; | |
795 | } | |
796 | ||
248f219c DH |
797 | /* |
798 | * Kill all the calls on a socket and shut it down. | |
799 | */ | |
800 | static int rxrpc_shutdown(struct socket *sock, int flags) | |
801 | { | |
802 | struct sock *sk = sock->sk; | |
803 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
804 | int ret = 0; | |
805 | ||
806 | _enter("%p,%d", sk, flags); | |
807 | ||
808 | if (flags != SHUT_RDWR) | |
809 | return -EOPNOTSUPP; | |
810 | if (sk->sk_state == RXRPC_CLOSE) | |
811 | return -ESHUTDOWN; | |
812 | ||
813 | lock_sock(sk); | |
814 | ||
248f219c DH |
815 | if (sk->sk_state < RXRPC_CLOSE) { |
816 | sk->sk_state = RXRPC_CLOSE; | |
817 | sk->sk_shutdown = SHUTDOWN_MASK; | |
818 | } else { | |
819 | ret = -ESHUTDOWN; | |
820 | } | |
248f219c DH |
821 | |
822 | rxrpc_discard_prealloc(rx); | |
823 | ||
824 | release_sock(sk); | |
825 | return ret; | |
826 | } | |
827 | ||
17926a79 DH |
828 | /* |
829 | * RxRPC socket destructor | |
830 | */ | |
831 | static void rxrpc_sock_destructor(struct sock *sk) | |
832 | { | |
833 | _enter("%p", sk); | |
834 | ||
835 | rxrpc_purge_queue(&sk->sk_receive_queue); | |
836 | ||
14afee4b | 837 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
547b792c IJ |
838 | WARN_ON(!sk_unhashed(sk)); |
839 | WARN_ON(sk->sk_socket); | |
17926a79 DH |
840 | |
841 | if (!sock_flag(sk, SOCK_DEAD)) { | |
842 | printk("Attempt to release alive rxrpc socket: %p\n", sk); | |
843 | return; | |
844 | } | |
845 | } | |
846 | ||
847 | /* | |
848 | * release an RxRPC socket | |
849 | */ | |
850 | static int rxrpc_release_sock(struct sock *sk) | |
851 | { | |
852 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
853 | ||
41c6d650 | 854 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
17926a79 DH |
855 | |
856 | /* declare the socket closed for business */ | |
857 | sock_orphan(sk); | |
858 | sk->sk_shutdown = SHUTDOWN_MASK; | |
859 | ||
f859ab61 DH |
860 | /* We want to kill off all connections from a service socket |
861 | * as fast as possible because we can't share these; client | |
862 | * sockets, on the other hand, can share an endpoint. | |
863 | */ | |
864 | switch (sk->sk_state) { | |
865 | case RXRPC_SERVER_BOUND: | |
866 | case RXRPC_SERVER_BOUND2: | |
867 | case RXRPC_SERVER_LISTENING: | |
868 | case RXRPC_SERVER_LISTEN_DISABLED: | |
869 | rx->local->service_closed = true; | |
870 | break; | |
871 | } | |
872 | ||
17926a79 | 873 | sk->sk_state = RXRPC_CLOSE; |
17926a79 | 874 | |
b63452c1 | 875 | if (rx->local && rcu_access_pointer(rx->local->service) == rx) { |
248f219c | 876 | write_lock(&rx->local->services_lock); |
b63452c1 | 877 | rcu_assign_pointer(rx->local->service, NULL); |
248f219c | 878 | write_unlock(&rx->local->services_lock); |
17926a79 DH |
879 | } |
880 | ||
881 | /* try to flush out this socket */ | |
00e90712 | 882 | rxrpc_discard_prealloc(rx); |
17926a79 | 883 | rxrpc_release_calls_on_socket(rx); |
651350d1 | 884 | flush_workqueue(rxrpc_workqueue); |
17926a79 DH |
885 | rxrpc_purge_queue(&sk->sk_receive_queue); |
886 | ||
0fde882f DH |
887 | rxrpc_unuse_local(rx->local, rxrpc_local_unuse_release_sock); |
888 | rxrpc_put_local(rx->local, rxrpc_local_put_release_sock); | |
5627cc8b | 889 | rx->local = NULL; |
17926a79 DH |
890 | key_put(rx->key); |
891 | rx->key = NULL; | |
892 | key_put(rx->securities); | |
893 | rx->securities = NULL; | |
894 | sock_put(sk); | |
895 | ||
896 | _leave(" = 0"); | |
897 | return 0; | |
898 | } | |
899 | ||
900 | /* | |
901 | * release an RxRPC BSD socket on close() or equivalent | |
902 | */ | |
903 | static int rxrpc_release(struct socket *sock) | |
904 | { | |
905 | struct sock *sk = sock->sk; | |
906 | ||
907 | _enter("%p{%p}", sock, sk); | |
908 | ||
909 | if (!sk) | |
910 | return 0; | |
911 | ||
912 | sock->sk = NULL; | |
913 | ||
914 | return rxrpc_release_sock(sk); | |
915 | } | |
916 | ||
917 | /* | |
918 | * RxRPC network protocol | |
919 | */ | |
920 | static const struct proto_ops rxrpc_rpc_ops = { | |
e33b3d97 | 921 | .family = PF_RXRPC, |
17926a79 DH |
922 | .owner = THIS_MODULE, |
923 | .release = rxrpc_release, | |
924 | .bind = rxrpc_bind, | |
925 | .connect = rxrpc_connect, | |
926 | .socketpair = sock_no_socketpair, | |
927 | .accept = sock_no_accept, | |
928 | .getname = sock_no_getname, | |
a11e1d43 | 929 | .poll = rxrpc_poll, |
17926a79 DH |
930 | .ioctl = sock_no_ioctl, |
931 | .listen = rxrpc_listen, | |
248f219c | 932 | .shutdown = rxrpc_shutdown, |
17926a79 | 933 | .setsockopt = rxrpc_setsockopt, |
515559ca | 934 | .getsockopt = rxrpc_getsockopt, |
17926a79 DH |
935 | .sendmsg = rxrpc_sendmsg, |
936 | .recvmsg = rxrpc_recvmsg, | |
937 | .mmap = sock_no_mmap, | |
938 | .sendpage = sock_no_sendpage, | |
939 | }; | |
940 | ||
941 | static struct proto rxrpc_proto = { | |
942 | .name = "RXRPC", | |
943 | .owner = THIS_MODULE, | |
944 | .obj_size = sizeof(struct rxrpc_sock), | |
0d12f8a4 | 945 | .max_header = sizeof(struct rxrpc_wire_header), |
17926a79 DH |
946 | }; |
947 | ||
ec1b4cf7 | 948 | static const struct net_proto_family rxrpc_family_ops = { |
17926a79 DH |
949 | .family = PF_RXRPC, |
950 | .create = rxrpc_create, | |
951 | .owner = THIS_MODULE, | |
952 | }; | |
953 | ||
954 | /* | |
955 | * initialise and register the RxRPC protocol | |
956 | */ | |
957 | static int __init af_rxrpc_init(void) | |
958 | { | |
17926a79 DH |
959 | int ret = -1; |
960 | ||
c593642c | 961 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof_field(struct sk_buff, cb)); |
17926a79 | 962 | |
651350d1 | 963 | ret = -ENOMEM; |
17926a79 DH |
964 | rxrpc_call_jar = kmem_cache_create( |
965 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, | |
20c2df83 | 966 | SLAB_HWCACHE_ALIGN, NULL); |
17926a79 | 967 | if (!rxrpc_call_jar) { |
9b6d5398 | 968 | pr_notice("Failed to allocate call jar\n"); |
17926a79 DH |
969 | goto error_call_jar; |
970 | } | |
971 | ||
a4ea4c47 | 972 | rxrpc_workqueue = alloc_workqueue("krxrpcd", WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
651350d1 | 973 | if (!rxrpc_workqueue) { |
9b6d5398 | 974 | pr_notice("Failed to allocate work queue\n"); |
651350d1 DH |
975 | goto error_work_queue; |
976 | } | |
977 | ||
648af7fc DH |
978 | ret = rxrpc_init_security(); |
979 | if (ret < 0) { | |
9b6d5398 | 980 | pr_crit("Cannot initialise security\n"); |
648af7fc DH |
981 | goto error_security; |
982 | } | |
983 | ||
5399d522 | 984 | ret = register_pernet_device(&rxrpc_net_ops); |
2baec2c3 DH |
985 | if (ret) |
986 | goto error_pernet; | |
987 | ||
17926a79 | 988 | ret = proto_register(&rxrpc_proto, 1); |
1c899641 | 989 | if (ret < 0) { |
9b6d5398 | 990 | pr_crit("Cannot register protocol\n"); |
17926a79 DH |
991 | goto error_proto; |
992 | } | |
993 | ||
994 | ret = sock_register(&rxrpc_family_ops); | |
995 | if (ret < 0) { | |
9b6d5398 | 996 | pr_crit("Cannot register socket family\n"); |
17926a79 DH |
997 | goto error_sock; |
998 | } | |
999 | ||
1000 | ret = register_key_type(&key_type_rxrpc); | |
1001 | if (ret < 0) { | |
9b6d5398 | 1002 | pr_crit("Cannot register client key type\n"); |
17926a79 DH |
1003 | goto error_key_type; |
1004 | } | |
1005 | ||
1006 | ret = register_key_type(&key_type_rxrpc_s); | |
1007 | if (ret < 0) { | |
9b6d5398 | 1008 | pr_crit("Cannot register server key type\n"); |
17926a79 DH |
1009 | goto error_key_type_s; |
1010 | } | |
1011 | ||
5873c083 DH |
1012 | ret = rxrpc_sysctl_init(); |
1013 | if (ret < 0) { | |
9b6d5398 | 1014 | pr_crit("Cannot register sysctls\n"); |
5873c083 DH |
1015 | goto error_sysctls; |
1016 | } | |
1017 | ||
17926a79 DH |
1018 | return 0; |
1019 | ||
5873c083 DH |
1020 | error_sysctls: |
1021 | unregister_key_type(&key_type_rxrpc_s); | |
17926a79 DH |
1022 | error_key_type_s: |
1023 | unregister_key_type(&key_type_rxrpc); | |
1024 | error_key_type: | |
1025 | sock_unregister(PF_RXRPC); | |
1026 | error_sock: | |
1027 | proto_unregister(&rxrpc_proto); | |
1028 | error_proto: | |
5399d522 | 1029 | unregister_pernet_device(&rxrpc_net_ops); |
2baec2c3 | 1030 | error_pernet: |
648af7fc | 1031 | rxrpc_exit_security(); |
8addc044 WY |
1032 | error_security: |
1033 | destroy_workqueue(rxrpc_workqueue); | |
651350d1 | 1034 | error_work_queue: |
17926a79 DH |
1035 | kmem_cache_destroy(rxrpc_call_jar); |
1036 | error_call_jar: | |
1037 | return ret; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * unregister the RxRPC protocol | |
1042 | */ | |
1043 | static void __exit af_rxrpc_exit(void) | |
1044 | { | |
1045 | _enter(""); | |
5873c083 | 1046 | rxrpc_sysctl_exit(); |
17926a79 DH |
1047 | unregister_key_type(&key_type_rxrpc_s); |
1048 | unregister_key_type(&key_type_rxrpc); | |
1049 | sock_unregister(PF_RXRPC); | |
1050 | proto_unregister(&rxrpc_proto); | |
5399d522 | 1051 | unregister_pernet_device(&rxrpc_net_ops); |
71f3ca40 | 1052 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); |
4f95dd78 | 1053 | |
2baec2c3 DH |
1054 | /* Make sure the local and peer records pinned by any dying connections |
1055 | * are released. | |
1056 | */ | |
1057 | rcu_barrier(); | |
2baec2c3 | 1058 | |
651350d1 | 1059 | destroy_workqueue(rxrpc_workqueue); |
648af7fc | 1060 | rxrpc_exit_security(); |
17926a79 DH |
1061 | kmem_cache_destroy(rxrpc_call_jar); |
1062 | _leave(""); | |
1063 | } | |
1064 | ||
1065 | module_init(af_rxrpc_init); | |
1066 | module_exit(af_rxrpc_exit); |