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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); | |
42f229c3 | 158 | if (local->service) |
28036f44 DH |
159 | goto service_in_use; |
160 | rx->local = local; | |
42f229c3 | 161 | local->service = rx; |
28036f44 DH |
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 | |
651350d1 DH |
331 | _leave(" = %p", call); |
332 | return call; | |
333 | } | |
651350d1 DH |
334 | EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
335 | ||
20acbd9a DH |
336 | /* |
337 | * Dummy function used to stop the notifier talking to recvmsg(). | |
338 | */ | |
339 | static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall, | |
340 | unsigned long call_user_ID) | |
341 | { | |
342 | } | |
343 | ||
651350d1 | 344 | /** |
e0416e7d | 345 | * rxrpc_kernel_shutdown_call - Allow a kernel service to shut down a call it was using |
4de48af6 | 346 | * @sock: The socket the call is on |
651350d1 DH |
347 | * @call: The call to end |
348 | * | |
e0416e7d | 349 | * Allow a kernel service to shut down a call it was using. The call must be |
651350d1 DH |
350 | * complete before this is called (the call should be aborted if necessary). |
351 | */ | |
e0416e7d | 352 | void rxrpc_kernel_shutdown_call(struct socket *sock, struct rxrpc_call *call) |
651350d1 | 353 | { |
a0575429 | 354 | _enter("%d{%d}", call->debug_id, refcount_read(&call->ref)); |
540b1c48 DH |
355 | |
356 | mutex_lock(&call->user_mutex); | |
e0416e7d DH |
357 | if (!test_bit(RXRPC_CALL_RELEASED, &call->flags)) { |
358 | rxrpc_release_call(rxrpc_sk(sock->sk), call); | |
359 | ||
360 | /* Make sure we're not going to call back into a kernel service */ | |
361 | if (call->notify_rx) { | |
362 | spin_lock(&call->notify_lock); | |
363 | call->notify_rx = rxrpc_dummy_notify_rx; | |
364 | spin_unlock(&call->notify_lock); | |
365 | } | |
20acbd9a | 366 | } |
540b1c48 | 367 | mutex_unlock(&call->user_mutex); |
e0416e7d DH |
368 | } |
369 | EXPORT_SYMBOL(rxrpc_kernel_shutdown_call); | |
370 | ||
371 | /** | |
372 | * rxrpc_kernel_put_call - Release a reference to a call | |
373 | * @sock: The socket the call is on | |
374 | * @call: The call to put | |
375 | * | |
376 | * Drop the application's ref on an rxrpc call. | |
377 | */ | |
378 | void rxrpc_kernel_put_call(struct socket *sock, struct rxrpc_call *call) | |
379 | { | |
cbd00891 | 380 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
651350d1 | 381 | } |
e0416e7d | 382 | EXPORT_SYMBOL(rxrpc_kernel_put_call); |
651350d1 | 383 | |
f4d15fb6 DH |
384 | /** |
385 | * rxrpc_kernel_check_life - Check to see whether a call is still alive | |
386 | * @sock: The socket the call is on | |
387 | * @call: The call to check | |
388 | * | |
93368b6b DH |
389 | * Allow a kernel service to find out whether a call is still alive - whether |
390 | * it has completed successfully and all received data has been consumed. | |
f4d15fb6 | 391 | */ |
4611da30 | 392 | bool rxrpc_kernel_check_life(const struct socket *sock, |
7d7587db | 393 | const struct rxrpc_call *call) |
f4d15fb6 | 394 | { |
93368b6b DH |
395 | if (!rxrpc_call_is_complete(call)) |
396 | return true; | |
397 | if (call->completion != RXRPC_CALL_SUCCEEDED) | |
398 | return false; | |
399 | return !skb_queue_empty(&call->recvmsg_queue); | |
f4d15fb6 DH |
400 | } |
401 | EXPORT_SYMBOL(rxrpc_kernel_check_life); | |
402 | ||
e908bcf4 DH |
403 | /** |
404 | * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call. | |
405 | * @sock: The socket the call is on | |
406 | * @call: The call to query | |
407 | * | |
408 | * Allow a kernel service to retrieve the epoch value from a service call to | |
409 | * see if the client at the other end rebooted. | |
410 | */ | |
411 | u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call) | |
412 | { | |
413 | return call->conn->proto.epoch; | |
414 | } | |
415 | EXPORT_SYMBOL(rxrpc_kernel_get_epoch); | |
416 | ||
651350d1 | 417 | /** |
d001648e | 418 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
651350d1 | 419 | * @sock: The socket to intercept received messages on |
d001648e | 420 | * @notify_new_call: Function to be called when new calls appear |
00e90712 | 421 | * @discard_new_call: Function to discard preallocated calls |
651350d1 | 422 | * |
d001648e | 423 | * Allow a kernel service to be given notifications about new calls. |
651350d1 | 424 | */ |
d001648e DH |
425 | void rxrpc_kernel_new_call_notification( |
426 | struct socket *sock, | |
00e90712 DH |
427 | rxrpc_notify_new_call_t notify_new_call, |
428 | rxrpc_discard_new_call_t discard_new_call) | |
651350d1 DH |
429 | { |
430 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
431 | ||
d001648e | 432 | rx->notify_new_call = notify_new_call; |
00e90712 | 433 | rx->discard_new_call = discard_new_call; |
651350d1 | 434 | } |
d001648e | 435 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
651350d1 | 436 | |
bbd172e3 DH |
437 | /** |
438 | * rxrpc_kernel_set_max_life - Set maximum lifespan on a call | |
439 | * @sock: The socket the call is on | |
440 | * @call: The call to configure | |
441 | * @hard_timeout: The maximum lifespan of the call in jiffies | |
442 | * | |
443 | * Set the maximum lifespan of a call. The call will end with ETIME or | |
444 | * ETIMEDOUT if it takes longer than this. | |
445 | */ | |
446 | void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call, | |
447 | unsigned long hard_timeout) | |
448 | { | |
449 | unsigned long now; | |
450 | ||
451 | mutex_lock(&call->user_mutex); | |
452 | ||
453 | now = jiffies; | |
454 | hard_timeout += now; | |
455 | WRITE_ONCE(call->expect_term_by, hard_timeout); | |
456 | rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard); | |
457 | ||
458 | mutex_unlock(&call->user_mutex); | |
459 | } | |
460 | EXPORT_SYMBOL(rxrpc_kernel_set_max_life); | |
461 | ||
17926a79 DH |
462 | /* |
463 | * connect an RxRPC socket | |
464 | * - this just targets it at a specific destination; no actual connection | |
465 | * negotiation takes place | |
466 | */ | |
467 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, | |
468 | int addr_len, int flags) | |
469 | { | |
2341e077 DH |
470 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
471 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
17926a79 DH |
472 | int ret; |
473 | ||
474 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); | |
475 | ||
476 | ret = rxrpc_validate_address(rx, srx, addr_len); | |
477 | if (ret < 0) { | |
478 | _leave(" = %d [bad addr]", ret); | |
479 | return ret; | |
480 | } | |
481 | ||
482 | lock_sock(&rx->sk); | |
483 | ||
2341e077 DH |
484 | ret = -EISCONN; |
485 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) | |
486 | goto error; | |
487 | ||
17926a79 | 488 | switch (rx->sk.sk_state) { |
2341e077 DH |
489 | case RXRPC_UNBOUND: |
490 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
40e67c12 | 491 | break; |
2341e077 | 492 | case RXRPC_CLIENT_UNBOUND: |
17926a79 DH |
493 | case RXRPC_CLIENT_BOUND: |
494 | break; | |
17926a79 | 495 | default: |
2341e077 DH |
496 | ret = -EBUSY; |
497 | goto error; | |
17926a79 DH |
498 | } |
499 | ||
2341e077 DH |
500 | rx->connect_srx = *srx; |
501 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); | |
502 | ret = 0; | |
17926a79 | 503 | |
2341e077 | 504 | error: |
17926a79 | 505 | release_sock(&rx->sk); |
2341e077 | 506 | return ret; |
17926a79 DH |
507 | } |
508 | ||
509 | /* | |
510 | * send a message through an RxRPC socket | |
511 | * - in a client this does a number of things: | |
512 | * - finds/sets up a connection for the security specified (if any) | |
513 | * - initiates a call (ID in control data) | |
514 | * - ends the request phase of a call (if MSG_MORE is not set) | |
515 | * - sends a call data packet | |
516 | * - may send an abort (abort code in control data) | |
517 | */ | |
1b784140 | 518 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
17926a79 | 519 | { |
2341e077 | 520 | struct rxrpc_local *local; |
17926a79 DH |
521 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
522 | int ret; | |
523 | ||
524 | _enter(",{%d},,%zu", rx->sk.sk_state, len); | |
525 | ||
526 | if (m->msg_flags & MSG_OOB) | |
527 | return -EOPNOTSUPP; | |
528 | ||
529 | if (m->msg_name) { | |
530 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); | |
531 | if (ret < 0) { | |
532 | _leave(" = %d [bad addr]", ret); | |
533 | return ret; | |
534 | } | |
535 | } | |
536 | ||
17926a79 DH |
537 | lock_sock(&rx->sk); |
538 | ||
17926a79 | 539 | switch (rx->sk.sk_state) { |
2341e077 | 540 | case RXRPC_UNBOUND: |
e835ada0 | 541 | case RXRPC_CLIENT_UNBOUND: |
cd5892c7 DH |
542 | rx->srx.srx_family = AF_RXRPC; |
543 | rx->srx.srx_service = 0; | |
544 | rx->srx.transport_type = SOCK_DGRAM; | |
545 | rx->srx.transport.family = rx->family; | |
546 | switch (rx->family) { | |
547 | case AF_INET: | |
548 | rx->srx.transport_len = sizeof(struct sockaddr_in); | |
549 | break; | |
d1912747 | 550 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
551 | case AF_INET6: |
552 | rx->srx.transport_len = sizeof(struct sockaddr_in6); | |
553 | break; | |
d1912747 | 554 | #endif |
cd5892c7 DH |
555 | default: |
556 | ret = -EAFNOSUPPORT; | |
557 | goto error_unlock; | |
558 | } | |
2baec2c3 | 559 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
2341e077 DH |
560 | if (IS_ERR(local)) { |
561 | ret = PTR_ERR(local); | |
562 | goto error_unlock; | |
17926a79 | 563 | } |
2341e077 DH |
564 | |
565 | rx->local = local; | |
e835ada0 | 566 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; |
df561f66 | 567 | fallthrough; |
2341e077 | 568 | |
17926a79 | 569 | case RXRPC_CLIENT_BOUND: |
2341e077 DH |
570 | if (!m->msg_name && |
571 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { | |
572 | m->msg_name = &rx->connect_srx; | |
573 | m->msg_namelen = sizeof(rx->connect_srx); | |
17926a79 | 574 | } |
df561f66 | 575 | fallthrough; |
2341e077 DH |
576 | case RXRPC_SERVER_BOUND: |
577 | case RXRPC_SERVER_LISTENING: | |
578 | ret = rxrpc_do_sendmsg(rx, m, len); | |
540b1c48 DH |
579 | /* The socket has been unlocked */ |
580 | goto out; | |
17926a79 | 581 | default: |
2341e077 | 582 | ret = -EINVAL; |
540b1c48 | 583 | goto error_unlock; |
17926a79 DH |
584 | } |
585 | ||
2341e077 | 586 | error_unlock: |
17926a79 | 587 | release_sock(&rx->sk); |
540b1c48 | 588 | out: |
17926a79 DH |
589 | _leave(" = %d", ret); |
590 | return ret; | |
591 | } | |
592 | ||
298cd88a CH |
593 | int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val) |
594 | { | |
595 | if (sk->sk_state != RXRPC_UNBOUND) | |
596 | return -EISCONN; | |
597 | if (val > RXRPC_SECURITY_MAX) | |
598 | return -EINVAL; | |
599 | lock_sock(sk); | |
600 | rxrpc_sk(sk)->min_sec_level = val; | |
601 | release_sock(sk); | |
602 | return 0; | |
603 | } | |
604 | EXPORT_SYMBOL(rxrpc_sock_set_min_security_level); | |
605 | ||
17926a79 DH |
606 | /* |
607 | * set RxRPC socket options | |
608 | */ | |
609 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, | |
a7b75c5a | 610 | sockptr_t optval, unsigned int optlen) |
17926a79 DH |
611 | { |
612 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
95c96174 | 613 | unsigned int min_sec_level; |
4722974d | 614 | u16 service_upgrade[2]; |
17926a79 DH |
615 | int ret; |
616 | ||
617 | _enter(",%d,%d,,%d", level, optname, optlen); | |
618 | ||
619 | lock_sock(&rx->sk); | |
620 | ret = -EOPNOTSUPP; | |
621 | ||
622 | if (level == SOL_RXRPC) { | |
623 | switch (optname) { | |
624 | case RXRPC_EXCLUSIVE_CONNECTION: | |
625 | ret = -EINVAL; | |
626 | if (optlen != 0) | |
627 | goto error; | |
628 | ret = -EISCONN; | |
2341e077 | 629 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 630 | goto error; |
cc8feb8e | 631 | rx->exclusive = true; |
17926a79 DH |
632 | goto success; |
633 | ||
634 | case RXRPC_SECURITY_KEY: | |
635 | ret = -EINVAL; | |
636 | if (rx->key) | |
637 | goto error; | |
638 | ret = -EISCONN; | |
2341e077 | 639 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
640 | goto error; |
641 | ret = rxrpc_request_key(rx, optval, optlen); | |
642 | goto error; | |
643 | ||
644 | case RXRPC_SECURITY_KEYRING: | |
645 | ret = -EINVAL; | |
646 | if (rx->key) | |
647 | goto error; | |
648 | ret = -EISCONN; | |
2341e077 | 649 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
650 | goto error; |
651 | ret = rxrpc_server_keyring(rx, optval, optlen); | |
652 | goto error; | |
653 | ||
654 | case RXRPC_MIN_SECURITY_LEVEL: | |
655 | ret = -EINVAL; | |
95c96174 | 656 | if (optlen != sizeof(unsigned int)) |
17926a79 DH |
657 | goto error; |
658 | ret = -EISCONN; | |
2341e077 | 659 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 660 | goto error; |
a7b75c5a CH |
661 | ret = copy_from_sockptr(&min_sec_level, optval, |
662 | sizeof(unsigned int)); | |
17926a79 DH |
663 | if (ret < 0) |
664 | goto error; | |
665 | ret = -EINVAL; | |
666 | if (min_sec_level > RXRPC_SECURITY_MAX) | |
667 | goto error; | |
668 | rx->min_sec_level = min_sec_level; | |
669 | goto success; | |
670 | ||
4722974d DH |
671 | case RXRPC_UPGRADEABLE_SERVICE: |
672 | ret = -EINVAL; | |
673 | if (optlen != sizeof(service_upgrade) || | |
674 | rx->service_upgrade.from != 0) | |
675 | goto error; | |
676 | ret = -EISCONN; | |
677 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) | |
678 | goto error; | |
679 | ret = -EFAULT; | |
a7b75c5a | 680 | if (copy_from_sockptr(service_upgrade, optval, |
4722974d DH |
681 | sizeof(service_upgrade)) != 0) |
682 | goto error; | |
683 | ret = -EINVAL; | |
684 | if ((service_upgrade[0] != rx->srx.srx_service || | |
685 | service_upgrade[1] != rx->second_service) && | |
686 | (service_upgrade[0] != rx->second_service || | |
687 | service_upgrade[1] != rx->srx.srx_service)) | |
688 | goto error; | |
689 | rx->service_upgrade.from = service_upgrade[0]; | |
690 | rx->service_upgrade.to = service_upgrade[1]; | |
691 | goto success; | |
692 | ||
17926a79 DH |
693 | default: |
694 | break; | |
695 | } | |
696 | } | |
697 | ||
698 | success: | |
699 | ret = 0; | |
700 | error: | |
701 | release_sock(&rx->sk); | |
702 | return ret; | |
703 | } | |
704 | ||
515559ca DH |
705 | /* |
706 | * Get socket options. | |
707 | */ | |
708 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, | |
709 | char __user *optval, int __user *_optlen) | |
710 | { | |
711 | int optlen; | |
3ec0efde | 712 | |
515559ca DH |
713 | if (level != SOL_RXRPC) |
714 | return -EOPNOTSUPP; | |
715 | ||
716 | if (get_user(optlen, _optlen)) | |
717 | return -EFAULT; | |
3ec0efde | 718 | |
515559ca DH |
719 | switch (optname) { |
720 | case RXRPC_SUPPORTED_CMSG: | |
721 | if (optlen < sizeof(int)) | |
722 | return -ETOOSMALL; | |
723 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || | |
724 | put_user(sizeof(int), _optlen)) | |
725 | return -EFAULT; | |
726 | return 0; | |
3ec0efde | 727 | |
515559ca DH |
728 | default: |
729 | return -EOPNOTSUPP; | |
730 | } | |
731 | } | |
732 | ||
17926a79 DH |
733 | /* |
734 | * permit an RxRPC socket to be polled | |
735 | */ | |
a11e1d43 LT |
736 | static __poll_t rxrpc_poll(struct file *file, struct socket *sock, |
737 | poll_table *wait) | |
17926a79 | 738 | { |
17926a79 | 739 | struct sock *sk = sock->sk; |
248f219c | 740 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
a11e1d43 LT |
741 | __poll_t mask; |
742 | ||
89ab066d | 743 | sock_poll_wait(file, sock, wait); |
a11e1d43 | 744 | mask = 0; |
17926a79 DH |
745 | |
746 | /* the socket is readable if there are any messages waiting on the Rx | |
747 | * queue */ | |
248f219c | 748 | if (!list_empty(&rx->recvmsg_q)) |
a9a08845 | 749 | mask |= EPOLLIN | EPOLLRDNORM; |
17926a79 DH |
750 | |
751 | /* the socket is writable if there is space to add new data to the | |
752 | * socket; there is no guarantee that any particular call in progress | |
753 | * on the socket may have space in the Tx ACK window */ | |
754 | if (rxrpc_writable(sk)) | |
a9a08845 | 755 | mask |= EPOLLOUT | EPOLLWRNORM; |
17926a79 DH |
756 | |
757 | return mask; | |
758 | } | |
759 | ||
760 | /* | |
761 | * create an RxRPC socket | |
762 | */ | |
3f378b68 EP |
763 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
764 | int kern) | |
17926a79 | 765 | { |
ace45bec | 766 | struct rxrpc_net *rxnet; |
17926a79 DH |
767 | struct rxrpc_sock *rx; |
768 | struct sock *sk; | |
769 | ||
770 | _enter("%p,%d", sock, protocol); | |
771 | ||
b4f1342f | 772 | /* we support transport protocol UDP/UDP6 only */ |
d1912747 DH |
773 | if (protocol != PF_INET && |
774 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) | |
17926a79 DH |
775 | return -EPROTONOSUPPORT; |
776 | ||
777 | if (sock->type != SOCK_DGRAM) | |
778 | return -ESOCKTNOSUPPORT; | |
779 | ||
780 | sock->ops = &rxrpc_rpc_ops; | |
781 | sock->state = SS_UNCONNECTED; | |
782 | ||
11aa9c28 | 783 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
17926a79 DH |
784 | if (!sk) |
785 | return -ENOMEM; | |
786 | ||
787 | sock_init_data(sock, sk); | |
8d94aa38 | 788 | sock_set_flag(sk, SOCK_RCU_FREE); |
2341e077 | 789 | sk->sk_state = RXRPC_UNBOUND; |
17926a79 | 790 | sk->sk_write_space = rxrpc_write_space; |
0e119b41 | 791 | sk->sk_max_ack_backlog = 0; |
17926a79 DH |
792 | sk->sk_destruct = rxrpc_sock_destructor; |
793 | ||
794 | rx = rxrpc_sk(sk); | |
19ffa01c | 795 | rx->family = protocol; |
17926a79 DH |
796 | rx->calls = RB_ROOT; |
797 | ||
248f219c DH |
798 | spin_lock_init(&rx->incoming_lock); |
799 | INIT_LIST_HEAD(&rx->sock_calls); | |
800 | INIT_LIST_HEAD(&rx->to_be_accepted); | |
801 | INIT_LIST_HEAD(&rx->recvmsg_q); | |
223f5901 | 802 | spin_lock_init(&rx->recvmsg_lock); |
17926a79 DH |
803 | rwlock_init(&rx->call_lock); |
804 | memset(&rx->srx, 0, sizeof(rx->srx)); | |
805 | ||
ace45bec DH |
806 | rxnet = rxrpc_net(sock_net(&rx->sk)); |
807 | timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1); | |
808 | ||
17926a79 DH |
809 | _leave(" = 0 [%p]", rx); |
810 | return 0; | |
811 | } | |
812 | ||
248f219c DH |
813 | /* |
814 | * Kill all the calls on a socket and shut it down. | |
815 | */ | |
816 | static int rxrpc_shutdown(struct socket *sock, int flags) | |
817 | { | |
818 | struct sock *sk = sock->sk; | |
819 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
820 | int ret = 0; | |
821 | ||
822 | _enter("%p,%d", sk, flags); | |
823 | ||
824 | if (flags != SHUT_RDWR) | |
825 | return -EOPNOTSUPP; | |
826 | if (sk->sk_state == RXRPC_CLOSE) | |
827 | return -ESHUTDOWN; | |
828 | ||
829 | lock_sock(sk); | |
830 | ||
248f219c DH |
831 | if (sk->sk_state < RXRPC_CLOSE) { |
832 | sk->sk_state = RXRPC_CLOSE; | |
833 | sk->sk_shutdown = SHUTDOWN_MASK; | |
834 | } else { | |
835 | ret = -ESHUTDOWN; | |
836 | } | |
248f219c DH |
837 | |
838 | rxrpc_discard_prealloc(rx); | |
839 | ||
840 | release_sock(sk); | |
841 | return ret; | |
842 | } | |
843 | ||
17926a79 DH |
844 | /* |
845 | * RxRPC socket destructor | |
846 | */ | |
847 | static void rxrpc_sock_destructor(struct sock *sk) | |
848 | { | |
849 | _enter("%p", sk); | |
850 | ||
851 | rxrpc_purge_queue(&sk->sk_receive_queue); | |
852 | ||
14afee4b | 853 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
547b792c IJ |
854 | WARN_ON(!sk_unhashed(sk)); |
855 | WARN_ON(sk->sk_socket); | |
17926a79 DH |
856 | |
857 | if (!sock_flag(sk, SOCK_DEAD)) { | |
858 | printk("Attempt to release alive rxrpc socket: %p\n", sk); | |
859 | return; | |
860 | } | |
861 | } | |
862 | ||
863 | /* | |
864 | * release an RxRPC socket | |
865 | */ | |
866 | static int rxrpc_release_sock(struct sock *sk) | |
867 | { | |
868 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
869 | ||
41c6d650 | 870 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
17926a79 DH |
871 | |
872 | /* declare the socket closed for business */ | |
873 | sock_orphan(sk); | |
874 | sk->sk_shutdown = SHUTDOWN_MASK; | |
875 | ||
f859ab61 DH |
876 | /* We want to kill off all connections from a service socket |
877 | * as fast as possible because we can't share these; client | |
878 | * sockets, on the other hand, can share an endpoint. | |
879 | */ | |
880 | switch (sk->sk_state) { | |
881 | case RXRPC_SERVER_BOUND: | |
882 | case RXRPC_SERVER_BOUND2: | |
883 | case RXRPC_SERVER_LISTENING: | |
884 | case RXRPC_SERVER_LISTEN_DISABLED: | |
885 | rx->local->service_closed = true; | |
886 | break; | |
887 | } | |
888 | ||
17926a79 | 889 | sk->sk_state = RXRPC_CLOSE; |
17926a79 | 890 | |
42f229c3 | 891 | if (rx->local && rx->local->service == rx) { |
248f219c | 892 | write_lock(&rx->local->services_lock); |
42f229c3 | 893 | rx->local->service = NULL; |
248f219c | 894 | write_unlock(&rx->local->services_lock); |
17926a79 DH |
895 | } |
896 | ||
897 | /* try to flush out this socket */ | |
00e90712 | 898 | rxrpc_discard_prealloc(rx); |
17926a79 | 899 | rxrpc_release_calls_on_socket(rx); |
651350d1 | 900 | flush_workqueue(rxrpc_workqueue); |
17926a79 DH |
901 | rxrpc_purge_queue(&sk->sk_receive_queue); |
902 | ||
0fde882f DH |
903 | rxrpc_unuse_local(rx->local, rxrpc_local_unuse_release_sock); |
904 | rxrpc_put_local(rx->local, rxrpc_local_put_release_sock); | |
5627cc8b | 905 | rx->local = NULL; |
17926a79 DH |
906 | key_put(rx->key); |
907 | rx->key = NULL; | |
908 | key_put(rx->securities); | |
909 | rx->securities = NULL; | |
910 | sock_put(sk); | |
911 | ||
912 | _leave(" = 0"); | |
913 | return 0; | |
914 | } | |
915 | ||
916 | /* | |
917 | * release an RxRPC BSD socket on close() or equivalent | |
918 | */ | |
919 | static int rxrpc_release(struct socket *sock) | |
920 | { | |
921 | struct sock *sk = sock->sk; | |
922 | ||
923 | _enter("%p{%p}", sock, sk); | |
924 | ||
925 | if (!sk) | |
926 | return 0; | |
927 | ||
928 | sock->sk = NULL; | |
929 | ||
930 | return rxrpc_release_sock(sk); | |
931 | } | |
932 | ||
933 | /* | |
934 | * RxRPC network protocol | |
935 | */ | |
936 | static const struct proto_ops rxrpc_rpc_ops = { | |
e33b3d97 | 937 | .family = PF_RXRPC, |
17926a79 DH |
938 | .owner = THIS_MODULE, |
939 | .release = rxrpc_release, | |
940 | .bind = rxrpc_bind, | |
941 | .connect = rxrpc_connect, | |
942 | .socketpair = sock_no_socketpair, | |
943 | .accept = sock_no_accept, | |
944 | .getname = sock_no_getname, | |
a11e1d43 | 945 | .poll = rxrpc_poll, |
17926a79 DH |
946 | .ioctl = sock_no_ioctl, |
947 | .listen = rxrpc_listen, | |
248f219c | 948 | .shutdown = rxrpc_shutdown, |
17926a79 | 949 | .setsockopt = rxrpc_setsockopt, |
515559ca | 950 | .getsockopt = rxrpc_getsockopt, |
17926a79 DH |
951 | .sendmsg = rxrpc_sendmsg, |
952 | .recvmsg = rxrpc_recvmsg, | |
953 | .mmap = sock_no_mmap, | |
954 | .sendpage = sock_no_sendpage, | |
955 | }; | |
956 | ||
957 | static struct proto rxrpc_proto = { | |
958 | .name = "RXRPC", | |
959 | .owner = THIS_MODULE, | |
960 | .obj_size = sizeof(struct rxrpc_sock), | |
0d12f8a4 | 961 | .max_header = sizeof(struct rxrpc_wire_header), |
17926a79 DH |
962 | }; |
963 | ||
ec1b4cf7 | 964 | static const struct net_proto_family rxrpc_family_ops = { |
17926a79 DH |
965 | .family = PF_RXRPC, |
966 | .create = rxrpc_create, | |
967 | .owner = THIS_MODULE, | |
968 | }; | |
969 | ||
970 | /* | |
971 | * initialise and register the RxRPC protocol | |
972 | */ | |
973 | static int __init af_rxrpc_init(void) | |
974 | { | |
17926a79 DH |
975 | int ret = -1; |
976 | ||
c593642c | 977 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof_field(struct sk_buff, cb)); |
17926a79 | 978 | |
651350d1 | 979 | ret = -ENOMEM; |
17926a79 DH |
980 | rxrpc_call_jar = kmem_cache_create( |
981 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, | |
20c2df83 | 982 | SLAB_HWCACHE_ALIGN, NULL); |
17926a79 | 983 | if (!rxrpc_call_jar) { |
9b6d5398 | 984 | pr_notice("Failed to allocate call jar\n"); |
17926a79 DH |
985 | goto error_call_jar; |
986 | } | |
987 | ||
a4ea4c47 | 988 | rxrpc_workqueue = alloc_workqueue("krxrpcd", WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1); |
651350d1 | 989 | if (!rxrpc_workqueue) { |
9b6d5398 | 990 | pr_notice("Failed to allocate work queue\n"); |
651350d1 DH |
991 | goto error_work_queue; |
992 | } | |
993 | ||
648af7fc DH |
994 | ret = rxrpc_init_security(); |
995 | if (ret < 0) { | |
9b6d5398 | 996 | pr_crit("Cannot initialise security\n"); |
648af7fc DH |
997 | goto error_security; |
998 | } | |
999 | ||
5399d522 | 1000 | ret = register_pernet_device(&rxrpc_net_ops); |
2baec2c3 DH |
1001 | if (ret) |
1002 | goto error_pernet; | |
1003 | ||
17926a79 | 1004 | ret = proto_register(&rxrpc_proto, 1); |
1c899641 | 1005 | if (ret < 0) { |
9b6d5398 | 1006 | pr_crit("Cannot register protocol\n"); |
17926a79 DH |
1007 | goto error_proto; |
1008 | } | |
1009 | ||
1010 | ret = sock_register(&rxrpc_family_ops); | |
1011 | if (ret < 0) { | |
9b6d5398 | 1012 | pr_crit("Cannot register socket family\n"); |
17926a79 DH |
1013 | goto error_sock; |
1014 | } | |
1015 | ||
1016 | ret = register_key_type(&key_type_rxrpc); | |
1017 | if (ret < 0) { | |
9b6d5398 | 1018 | pr_crit("Cannot register client key type\n"); |
17926a79 DH |
1019 | goto error_key_type; |
1020 | } | |
1021 | ||
1022 | ret = register_key_type(&key_type_rxrpc_s); | |
1023 | if (ret < 0) { | |
9b6d5398 | 1024 | pr_crit("Cannot register server key type\n"); |
17926a79 DH |
1025 | goto error_key_type_s; |
1026 | } | |
1027 | ||
5873c083 DH |
1028 | ret = rxrpc_sysctl_init(); |
1029 | if (ret < 0) { | |
9b6d5398 | 1030 | pr_crit("Cannot register sysctls\n"); |
5873c083 DH |
1031 | goto error_sysctls; |
1032 | } | |
1033 | ||
17926a79 DH |
1034 | return 0; |
1035 | ||
5873c083 DH |
1036 | error_sysctls: |
1037 | unregister_key_type(&key_type_rxrpc_s); | |
17926a79 DH |
1038 | error_key_type_s: |
1039 | unregister_key_type(&key_type_rxrpc); | |
1040 | error_key_type: | |
1041 | sock_unregister(PF_RXRPC); | |
1042 | error_sock: | |
1043 | proto_unregister(&rxrpc_proto); | |
1044 | error_proto: | |
5399d522 | 1045 | unregister_pernet_device(&rxrpc_net_ops); |
2baec2c3 | 1046 | error_pernet: |
648af7fc | 1047 | rxrpc_exit_security(); |
8addc044 WY |
1048 | error_security: |
1049 | destroy_workqueue(rxrpc_workqueue); | |
651350d1 | 1050 | error_work_queue: |
17926a79 DH |
1051 | kmem_cache_destroy(rxrpc_call_jar); |
1052 | error_call_jar: | |
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * unregister the RxRPC protocol | |
1058 | */ | |
1059 | static void __exit af_rxrpc_exit(void) | |
1060 | { | |
1061 | _enter(""); | |
5873c083 | 1062 | rxrpc_sysctl_exit(); |
17926a79 DH |
1063 | unregister_key_type(&key_type_rxrpc_s); |
1064 | unregister_key_type(&key_type_rxrpc); | |
1065 | sock_unregister(PF_RXRPC); | |
1066 | proto_unregister(&rxrpc_proto); | |
5399d522 | 1067 | unregister_pernet_device(&rxrpc_net_ops); |
71f3ca40 | 1068 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); |
4f95dd78 | 1069 | |
2baec2c3 DH |
1070 | /* Make sure the local and peer records pinned by any dying connections |
1071 | * are released. | |
1072 | */ | |
1073 | rcu_barrier(); | |
2baec2c3 | 1074 | |
651350d1 | 1075 | destroy_workqueue(rxrpc_workqueue); |
648af7fc | 1076 | rxrpc_exit_security(); |
17926a79 DH |
1077 | kmem_cache_destroy(rxrpc_call_jar); |
1078 | _leave(""); | |
1079 | } | |
1080 | ||
1081 | module_init(af_rxrpc_init); | |
1082 | module_exit(af_rxrpc_exit); |