Commit | Line | Data |
---|---|---|
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 */ | |
71f3ca40 | 42 | atomic_t rxrpc_n_tx_skbs, 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 | ||
46894a13 DH |
96 | if (srx->transport.family != rx->family && |
97 | srx->transport.family == AF_INET && rx->family != AF_INET6) | |
17926a79 DH |
98 | return -EAFNOSUPPORT; |
99 | ||
100 | switch (srx->transport.family) { | |
101 | case AF_INET: | |
4f95dd78 DH |
102 | if (srx->transport_len < sizeof(struct sockaddr_in)) |
103 | return -EINVAL; | |
ab802ee0 | 104 | tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad); |
17926a79 DH |
105 | break; |
106 | ||
d1912747 | 107 | #ifdef CONFIG_AF_RXRPC_IPV6 |
17926a79 | 108 | case AF_INET6: |
75b54cb5 DH |
109 | if (srx->transport_len < sizeof(struct sockaddr_in6)) |
110 | return -EINVAL; | |
111 | tail = offsetof(struct sockaddr_rxrpc, transport) + | |
112 | sizeof(struct sockaddr_in6); | |
113 | break; | |
d1912747 | 114 | #endif |
75b54cb5 | 115 | |
17926a79 DH |
116 | default: |
117 | return -EAFNOSUPPORT; | |
118 | } | |
119 | ||
ab802ee0 DH |
120 | if (tail < len) |
121 | memset((void *)srx + tail, 0, len - tail); | |
75b54cb5 | 122 | _debug("INET: %pISp", &srx->transport); |
17926a79 DH |
123 | return 0; |
124 | } | |
125 | ||
126 | /* | |
127 | * bind a local address to an RxRPC socket | |
128 | */ | |
129 | static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len) | |
130 | { | |
b4f1342f | 131 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr; |
17926a79 | 132 | struct rxrpc_local *local; |
68d6d1ae | 133 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
a9107a14 | 134 | u16 service_id; |
17926a79 DH |
135 | int ret; |
136 | ||
137 | _enter("%p,%p,%d", rx, saddr, len); | |
138 | ||
139 | ret = rxrpc_validate_address(rx, srx, len); | |
140 | if (ret < 0) | |
141 | goto error; | |
a9107a14 | 142 | service_id = srx->srx_service; |
17926a79 DH |
143 | |
144 | lock_sock(&rx->sk); | |
145 | ||
28036f44 DH |
146 | switch (rx->sk.sk_state) { |
147 | case RXRPC_UNBOUND: | |
148 | rx->srx = *srx; | |
149 | local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx); | |
150 | if (IS_ERR(local)) { | |
151 | ret = PTR_ERR(local); | |
152 | goto error_unlock; | |
153 | } | |
154 | ||
155 | if (service_id) { | |
156 | write_lock(&local->services_lock); | |
157 | if (rcu_access_pointer(local->service)) | |
158 | goto service_in_use; | |
159 | rx->local = local; | |
160 | rcu_assign_pointer(local->service, rx); | |
161 | write_unlock(&local->services_lock); | |
162 | ||
163 | rx->sk.sk_state = RXRPC_SERVER_BOUND; | |
164 | } else { | |
165 | rx->local = local; | |
166 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; | |
167 | } | |
168 | break; | |
17926a79 | 169 | |
28036f44 DH |
170 | case RXRPC_SERVER_BOUND: |
171 | ret = -EINVAL; | |
172 | if (service_id == 0) | |
173 | goto error_unlock; | |
174 | ret = -EADDRINUSE; | |
175 | if (service_id == rx->srx.srx_service) | |
176 | goto error_unlock; | |
177 | ret = -EINVAL; | |
178 | srx->srx_service = rx->srx.srx_service; | |
179 | if (memcmp(srx, &rx->srx, sizeof(*srx)) != 0) | |
180 | goto error_unlock; | |
181 | rx->second_service = service_id; | |
182 | rx->sk.sk_state = RXRPC_SERVER_BOUND2; | |
183 | break; | |
17926a79 | 184 | |
28036f44 DH |
185 | default: |
186 | ret = -EINVAL; | |
17926a79 DH |
187 | goto error_unlock; |
188 | } | |
189 | ||
17926a79 DH |
190 | release_sock(&rx->sk); |
191 | _leave(" = 0"); | |
192 | return 0; | |
193 | ||
194 | service_in_use: | |
248f219c | 195 | write_unlock(&local->services_lock); |
730c5fd4 | 196 | rxrpc_unuse_local(local); |
04d36d74 | 197 | rxrpc_put_local(local); |
2341e077 | 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 | } | |
df561f66 | 249 | fallthrough; |
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 |
76f2fe73 | 270 | * @interruptibility: The call is interruptible, or can be canceled. |
a25e21f0 | 271 | * @debug_id: The debug ID for tracing to be assigned to the call |
651350d1 DH |
272 | * |
273 | * Allow a kernel service to begin a call on the nominated socket. This just | |
274 | * sets up all the internal tracking structures and allocates connection and | |
275 | * call IDs as appropriate. The call to be used is returned. | |
276 | * | |
277 | * The default socket destination address and security may be overridden by | |
278 | * supplying @srx and @key. | |
279 | */ | |
280 | struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, | |
281 | struct sockaddr_rxrpc *srx, | |
282 | struct key *key, | |
283 | unsigned long user_call_ID, | |
e754eba6 | 284 | s64 tx_total_len, |
d001648e | 285 | gfp_t gfp, |
a68f4a27 | 286 | rxrpc_notify_rx_t notify_rx, |
a25e21f0 | 287 | bool upgrade, |
e138aa7d | 288 | enum rxrpc_interruptibility interruptibility, |
a25e21f0 | 289 | unsigned int debug_id) |
651350d1 | 290 | { |
19ffa01c | 291 | struct rxrpc_conn_parameters cp; |
48124178 | 292 | struct rxrpc_call_params p; |
651350d1 DH |
293 | struct rxrpc_call *call; |
294 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
f4552c2d | 295 | int ret; |
651350d1 DH |
296 | |
297 | _enter(",,%x,%lx", key_serial(key), user_call_ID); | |
298 | ||
f4552c2d DH |
299 | ret = rxrpc_validate_address(rx, srx, sizeof(*srx)); |
300 | if (ret < 0) | |
301 | return ERR_PTR(ret); | |
302 | ||
651350d1 DH |
303 | lock_sock(&rx->sk); |
304 | ||
19ffa01c DH |
305 | if (!key) |
306 | key = rx->key; | |
307 | if (key && !key->payload.data[0]) | |
308 | key = NULL; /* a no-security key */ | |
309 | ||
48124178 | 310 | memset(&p, 0, sizeof(p)); |
b7a7d674 DH |
311 | p.user_call_ID = user_call_ID; |
312 | p.tx_total_len = tx_total_len; | |
313 | p.interruptibility = interruptibility; | |
314 | p.kernel = true; | |
48124178 | 315 | |
19ffa01c DH |
316 | memset(&cp, 0, sizeof(cp)); |
317 | cp.local = rx->local; | |
318 | cp.key = key; | |
93864fc3 | 319 | cp.security_level = rx->min_sec_level; |
19ffa01c | 320 | cp.exclusive = false; |
a68f4a27 | 321 | cp.upgrade = upgrade; |
19ffa01c | 322 | cp.service_id = srx->srx_service; |
a25e21f0 | 323 | call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id); |
540b1c48 | 324 | /* The socket has been unlocked. */ |
6cb3ece9 | 325 | if (!IS_ERR(call)) { |
d001648e | 326 | call->notify_rx = notify_rx; |
6cb3ece9 DH |
327 | mutex_unlock(&call->user_mutex); |
328 | } | |
19ffa01c | 329 | |
17226f12 | 330 | rxrpc_put_peer(cp.peer); |
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 DH |
344 | /** |
345 | * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using | |
4de48af6 | 346 | * @sock: The socket the call is on |
651350d1 DH |
347 | * @call: The call to end |
348 | * | |
349 | * Allow a kernel service to end a call it was using. The call must be | |
350 | * complete before this is called (the call should be aborted if necessary). | |
351 | */ | |
4de48af6 | 352 | void rxrpc_kernel_end_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); | |
8d94aa38 | 357 | rxrpc_release_call(rxrpc_sk(sock->sk), call); |
20acbd9a DH |
358 | |
359 | /* Make sure we're not going to call back into a kernel service */ | |
360 | if (call->notify_rx) { | |
361 | spin_lock_bh(&call->notify_lock); | |
362 | call->notify_rx = rxrpc_dummy_notify_rx; | |
363 | spin_unlock_bh(&call->notify_lock); | |
364 | } | |
365 | ||
540b1c48 | 366 | mutex_unlock(&call->user_mutex); |
cbd00891 | 367 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
651350d1 | 368 | } |
651350d1 DH |
369 | EXPORT_SYMBOL(rxrpc_kernel_end_call); |
370 | ||
f4d15fb6 DH |
371 | /** |
372 | * rxrpc_kernel_check_life - Check to see whether a call is still alive | |
373 | * @sock: The socket the call is on | |
374 | * @call: The call to check | |
375 | * | |
7d7587db DH |
376 | * Allow a kernel service to find out whether a call is still alive - |
377 | * ie. whether it has completed. | |
f4d15fb6 | 378 | */ |
4611da30 | 379 | bool rxrpc_kernel_check_life(const struct socket *sock, |
7d7587db | 380 | const struct rxrpc_call *call) |
f4d15fb6 | 381 | { |
4611da30 | 382 | return call->state != RXRPC_CALL_COMPLETE; |
f4d15fb6 DH |
383 | } |
384 | EXPORT_SYMBOL(rxrpc_kernel_check_life); | |
385 | ||
e908bcf4 DH |
386 | /** |
387 | * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call. | |
388 | * @sock: The socket the call is on | |
389 | * @call: The call to query | |
390 | * | |
391 | * Allow a kernel service to retrieve the epoch value from a service call to | |
392 | * see if the client at the other end rebooted. | |
393 | */ | |
394 | u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call) | |
395 | { | |
396 | return call->conn->proto.epoch; | |
397 | } | |
398 | EXPORT_SYMBOL(rxrpc_kernel_get_epoch); | |
399 | ||
651350d1 | 400 | /** |
d001648e | 401 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
651350d1 | 402 | * @sock: The socket to intercept received messages on |
d001648e | 403 | * @notify_new_call: Function to be called when new calls appear |
00e90712 | 404 | * @discard_new_call: Function to discard preallocated calls |
651350d1 | 405 | * |
d001648e | 406 | * Allow a kernel service to be given notifications about new calls. |
651350d1 | 407 | */ |
d001648e DH |
408 | void rxrpc_kernel_new_call_notification( |
409 | struct socket *sock, | |
00e90712 DH |
410 | rxrpc_notify_new_call_t notify_new_call, |
411 | rxrpc_discard_new_call_t discard_new_call) | |
651350d1 DH |
412 | { |
413 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
414 | ||
d001648e | 415 | rx->notify_new_call = notify_new_call; |
00e90712 | 416 | rx->discard_new_call = discard_new_call; |
651350d1 | 417 | } |
d001648e | 418 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
651350d1 | 419 | |
bbd172e3 DH |
420 | /** |
421 | * rxrpc_kernel_set_max_life - Set maximum lifespan on a call | |
422 | * @sock: The socket the call is on | |
423 | * @call: The call to configure | |
424 | * @hard_timeout: The maximum lifespan of the call in jiffies | |
425 | * | |
426 | * Set the maximum lifespan of a call. The call will end with ETIME or | |
427 | * ETIMEDOUT if it takes longer than this. | |
428 | */ | |
429 | void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call, | |
430 | unsigned long hard_timeout) | |
431 | { | |
432 | unsigned long now; | |
433 | ||
434 | mutex_lock(&call->user_mutex); | |
435 | ||
436 | now = jiffies; | |
437 | hard_timeout += now; | |
438 | WRITE_ONCE(call->expect_term_by, hard_timeout); | |
439 | rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard); | |
440 | ||
441 | mutex_unlock(&call->user_mutex); | |
442 | } | |
443 | EXPORT_SYMBOL(rxrpc_kernel_set_max_life); | |
444 | ||
17926a79 DH |
445 | /* |
446 | * connect an RxRPC socket | |
447 | * - this just targets it at a specific destination; no actual connection | |
448 | * negotiation takes place | |
449 | */ | |
450 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, | |
451 | int addr_len, int flags) | |
452 | { | |
2341e077 DH |
453 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
454 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
17926a79 DH |
455 | int ret; |
456 | ||
457 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); | |
458 | ||
459 | ret = rxrpc_validate_address(rx, srx, addr_len); | |
460 | if (ret < 0) { | |
461 | _leave(" = %d [bad addr]", ret); | |
462 | return ret; | |
463 | } | |
464 | ||
465 | lock_sock(&rx->sk); | |
466 | ||
2341e077 DH |
467 | ret = -EISCONN; |
468 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) | |
469 | goto error; | |
470 | ||
17926a79 | 471 | switch (rx->sk.sk_state) { |
2341e077 DH |
472 | case RXRPC_UNBOUND: |
473 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
40e67c12 | 474 | break; |
2341e077 | 475 | case RXRPC_CLIENT_UNBOUND: |
17926a79 DH |
476 | case RXRPC_CLIENT_BOUND: |
477 | break; | |
17926a79 | 478 | default: |
2341e077 DH |
479 | ret = -EBUSY; |
480 | goto error; | |
17926a79 DH |
481 | } |
482 | ||
2341e077 DH |
483 | rx->connect_srx = *srx; |
484 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); | |
485 | ret = 0; | |
17926a79 | 486 | |
2341e077 | 487 | error: |
17926a79 | 488 | release_sock(&rx->sk); |
2341e077 | 489 | return ret; |
17926a79 DH |
490 | } |
491 | ||
492 | /* | |
493 | * send a message through an RxRPC socket | |
494 | * - in a client this does a number of things: | |
495 | * - finds/sets up a connection for the security specified (if any) | |
496 | * - initiates a call (ID in control data) | |
497 | * - ends the request phase of a call (if MSG_MORE is not set) | |
498 | * - sends a call data packet | |
499 | * - may send an abort (abort code in control data) | |
500 | */ | |
1b784140 | 501 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
17926a79 | 502 | { |
2341e077 | 503 | struct rxrpc_local *local; |
17926a79 DH |
504 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
505 | int ret; | |
506 | ||
507 | _enter(",{%d},,%zu", rx->sk.sk_state, len); | |
508 | ||
509 | if (m->msg_flags & MSG_OOB) | |
510 | return -EOPNOTSUPP; | |
511 | ||
512 | if (m->msg_name) { | |
513 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); | |
514 | if (ret < 0) { | |
515 | _leave(" = %d [bad addr]", ret); | |
516 | return ret; | |
517 | } | |
518 | } | |
519 | ||
17926a79 DH |
520 | lock_sock(&rx->sk); |
521 | ||
17926a79 | 522 | switch (rx->sk.sk_state) { |
2341e077 | 523 | case RXRPC_UNBOUND: |
e835ada0 | 524 | case RXRPC_CLIENT_UNBOUND: |
cd5892c7 DH |
525 | rx->srx.srx_family = AF_RXRPC; |
526 | rx->srx.srx_service = 0; | |
527 | rx->srx.transport_type = SOCK_DGRAM; | |
528 | rx->srx.transport.family = rx->family; | |
529 | switch (rx->family) { | |
530 | case AF_INET: | |
531 | rx->srx.transport_len = sizeof(struct sockaddr_in); | |
532 | break; | |
d1912747 | 533 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
534 | case AF_INET6: |
535 | rx->srx.transport_len = sizeof(struct sockaddr_in6); | |
536 | break; | |
d1912747 | 537 | #endif |
cd5892c7 DH |
538 | default: |
539 | ret = -EAFNOSUPPORT; | |
540 | goto error_unlock; | |
541 | } | |
2baec2c3 | 542 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
2341e077 DH |
543 | if (IS_ERR(local)) { |
544 | ret = PTR_ERR(local); | |
545 | goto error_unlock; | |
17926a79 | 546 | } |
2341e077 DH |
547 | |
548 | rx->local = local; | |
e835ada0 | 549 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; |
df561f66 | 550 | fallthrough; |
2341e077 | 551 | |
17926a79 | 552 | case RXRPC_CLIENT_BOUND: |
2341e077 DH |
553 | if (!m->msg_name && |
554 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { | |
555 | m->msg_name = &rx->connect_srx; | |
556 | m->msg_namelen = sizeof(rx->connect_srx); | |
17926a79 | 557 | } |
df561f66 | 558 | fallthrough; |
2341e077 DH |
559 | case RXRPC_SERVER_BOUND: |
560 | case RXRPC_SERVER_LISTENING: | |
561 | ret = rxrpc_do_sendmsg(rx, m, len); | |
540b1c48 DH |
562 | /* The socket has been unlocked */ |
563 | goto out; | |
17926a79 | 564 | default: |
2341e077 | 565 | ret = -EINVAL; |
540b1c48 | 566 | goto error_unlock; |
17926a79 DH |
567 | } |
568 | ||
2341e077 | 569 | error_unlock: |
17926a79 | 570 | release_sock(&rx->sk); |
540b1c48 | 571 | out: |
17926a79 DH |
572 | _leave(" = %d", ret); |
573 | return ret; | |
574 | } | |
575 | ||
298cd88a CH |
576 | int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val) |
577 | { | |
578 | if (sk->sk_state != RXRPC_UNBOUND) | |
579 | return -EISCONN; | |
580 | if (val > RXRPC_SECURITY_MAX) | |
581 | return -EINVAL; | |
582 | lock_sock(sk); | |
583 | rxrpc_sk(sk)->min_sec_level = val; | |
584 | release_sock(sk); | |
585 | return 0; | |
586 | } | |
587 | EXPORT_SYMBOL(rxrpc_sock_set_min_security_level); | |
588 | ||
17926a79 DH |
589 | /* |
590 | * set RxRPC socket options | |
591 | */ | |
592 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, | |
a7b75c5a | 593 | sockptr_t optval, unsigned int optlen) |
17926a79 DH |
594 | { |
595 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
95c96174 | 596 | unsigned int min_sec_level; |
4722974d | 597 | u16 service_upgrade[2]; |
17926a79 DH |
598 | int ret; |
599 | ||
600 | _enter(",%d,%d,,%d", level, optname, optlen); | |
601 | ||
602 | lock_sock(&rx->sk); | |
603 | ret = -EOPNOTSUPP; | |
604 | ||
605 | if (level == SOL_RXRPC) { | |
606 | switch (optname) { | |
607 | case RXRPC_EXCLUSIVE_CONNECTION: | |
608 | ret = -EINVAL; | |
609 | if (optlen != 0) | |
610 | goto error; | |
611 | ret = -EISCONN; | |
2341e077 | 612 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 613 | goto error; |
cc8feb8e | 614 | rx->exclusive = true; |
17926a79 DH |
615 | goto success; |
616 | ||
617 | case RXRPC_SECURITY_KEY: | |
618 | ret = -EINVAL; | |
619 | if (rx->key) | |
620 | goto error; | |
621 | ret = -EISCONN; | |
2341e077 | 622 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
623 | goto error; |
624 | ret = rxrpc_request_key(rx, optval, optlen); | |
625 | goto error; | |
626 | ||
627 | case RXRPC_SECURITY_KEYRING: | |
628 | ret = -EINVAL; | |
629 | if (rx->key) | |
630 | goto error; | |
631 | ret = -EISCONN; | |
2341e077 | 632 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
633 | goto error; |
634 | ret = rxrpc_server_keyring(rx, optval, optlen); | |
635 | goto error; | |
636 | ||
637 | case RXRPC_MIN_SECURITY_LEVEL: | |
638 | ret = -EINVAL; | |
95c96174 | 639 | if (optlen != sizeof(unsigned int)) |
17926a79 DH |
640 | goto error; |
641 | ret = -EISCONN; | |
2341e077 | 642 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 643 | goto error; |
a7b75c5a CH |
644 | ret = copy_from_sockptr(&min_sec_level, optval, |
645 | sizeof(unsigned int)); | |
17926a79 DH |
646 | if (ret < 0) |
647 | goto error; | |
648 | ret = -EINVAL; | |
649 | if (min_sec_level > RXRPC_SECURITY_MAX) | |
650 | goto error; | |
651 | rx->min_sec_level = min_sec_level; | |
652 | goto success; | |
653 | ||
4722974d DH |
654 | case RXRPC_UPGRADEABLE_SERVICE: |
655 | ret = -EINVAL; | |
656 | if (optlen != sizeof(service_upgrade) || | |
657 | rx->service_upgrade.from != 0) | |
658 | goto error; | |
659 | ret = -EISCONN; | |
660 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) | |
661 | goto error; | |
662 | ret = -EFAULT; | |
a7b75c5a | 663 | if (copy_from_sockptr(service_upgrade, optval, |
4722974d DH |
664 | sizeof(service_upgrade)) != 0) |
665 | goto error; | |
666 | ret = -EINVAL; | |
667 | if ((service_upgrade[0] != rx->srx.srx_service || | |
668 | service_upgrade[1] != rx->second_service) && | |
669 | (service_upgrade[0] != rx->second_service || | |
670 | service_upgrade[1] != rx->srx.srx_service)) | |
671 | goto error; | |
672 | rx->service_upgrade.from = service_upgrade[0]; | |
673 | rx->service_upgrade.to = service_upgrade[1]; | |
674 | goto success; | |
675 | ||
17926a79 DH |
676 | default: |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
681 | success: | |
682 | ret = 0; | |
683 | error: | |
684 | release_sock(&rx->sk); | |
685 | return ret; | |
686 | } | |
687 | ||
515559ca DH |
688 | /* |
689 | * Get socket options. | |
690 | */ | |
691 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, | |
692 | char __user *optval, int __user *_optlen) | |
693 | { | |
694 | int optlen; | |
3ec0efde | 695 | |
515559ca DH |
696 | if (level != SOL_RXRPC) |
697 | return -EOPNOTSUPP; | |
698 | ||
699 | if (get_user(optlen, _optlen)) | |
700 | return -EFAULT; | |
3ec0efde | 701 | |
515559ca DH |
702 | switch (optname) { |
703 | case RXRPC_SUPPORTED_CMSG: | |
704 | if (optlen < sizeof(int)) | |
705 | return -ETOOSMALL; | |
706 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || | |
707 | put_user(sizeof(int), _optlen)) | |
708 | return -EFAULT; | |
709 | return 0; | |
3ec0efde | 710 | |
515559ca DH |
711 | default: |
712 | return -EOPNOTSUPP; | |
713 | } | |
714 | } | |
715 | ||
17926a79 DH |
716 | /* |
717 | * permit an RxRPC socket to be polled | |
718 | */ | |
a11e1d43 LT |
719 | static __poll_t rxrpc_poll(struct file *file, struct socket *sock, |
720 | poll_table *wait) | |
17926a79 | 721 | { |
17926a79 | 722 | struct sock *sk = sock->sk; |
248f219c | 723 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
a11e1d43 LT |
724 | __poll_t mask; |
725 | ||
89ab066d | 726 | sock_poll_wait(file, sock, wait); |
a11e1d43 | 727 | mask = 0; |
17926a79 DH |
728 | |
729 | /* the socket is readable if there are any messages waiting on the Rx | |
730 | * queue */ | |
248f219c | 731 | if (!list_empty(&rx->recvmsg_q)) |
a9a08845 | 732 | mask |= EPOLLIN | EPOLLRDNORM; |
17926a79 DH |
733 | |
734 | /* the socket is writable if there is space to add new data to the | |
735 | * socket; there is no guarantee that any particular call in progress | |
736 | * on the socket may have space in the Tx ACK window */ | |
737 | if (rxrpc_writable(sk)) | |
a9a08845 | 738 | mask |= EPOLLOUT | EPOLLWRNORM; |
17926a79 DH |
739 | |
740 | return mask; | |
741 | } | |
742 | ||
743 | /* | |
744 | * create an RxRPC socket | |
745 | */ | |
3f378b68 EP |
746 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
747 | int kern) | |
17926a79 | 748 | { |
ace45bec | 749 | struct rxrpc_net *rxnet; |
17926a79 DH |
750 | struct rxrpc_sock *rx; |
751 | struct sock *sk; | |
752 | ||
753 | _enter("%p,%d", sock, protocol); | |
754 | ||
b4f1342f | 755 | /* we support transport protocol UDP/UDP6 only */ |
d1912747 DH |
756 | if (protocol != PF_INET && |
757 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) | |
17926a79 DH |
758 | return -EPROTONOSUPPORT; |
759 | ||
760 | if (sock->type != SOCK_DGRAM) | |
761 | return -ESOCKTNOSUPPORT; | |
762 | ||
763 | sock->ops = &rxrpc_rpc_ops; | |
764 | sock->state = SS_UNCONNECTED; | |
765 | ||
11aa9c28 | 766 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
17926a79 DH |
767 | if (!sk) |
768 | return -ENOMEM; | |
769 | ||
770 | sock_init_data(sock, sk); | |
8d94aa38 | 771 | sock_set_flag(sk, SOCK_RCU_FREE); |
2341e077 | 772 | sk->sk_state = RXRPC_UNBOUND; |
17926a79 | 773 | sk->sk_write_space = rxrpc_write_space; |
0e119b41 | 774 | sk->sk_max_ack_backlog = 0; |
17926a79 DH |
775 | sk->sk_destruct = rxrpc_sock_destructor; |
776 | ||
777 | rx = rxrpc_sk(sk); | |
19ffa01c | 778 | rx->family = protocol; |
17926a79 DH |
779 | rx->calls = RB_ROOT; |
780 | ||
248f219c DH |
781 | spin_lock_init(&rx->incoming_lock); |
782 | INIT_LIST_HEAD(&rx->sock_calls); | |
783 | INIT_LIST_HEAD(&rx->to_be_accepted); | |
784 | INIT_LIST_HEAD(&rx->recvmsg_q); | |
785 | rwlock_init(&rx->recvmsg_lock); | |
17926a79 DH |
786 | rwlock_init(&rx->call_lock); |
787 | memset(&rx->srx, 0, sizeof(rx->srx)); | |
788 | ||
ace45bec DH |
789 | rxnet = rxrpc_net(sock_net(&rx->sk)); |
790 | timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1); | |
791 | ||
17926a79 DH |
792 | _leave(" = 0 [%p]", rx); |
793 | return 0; | |
794 | } | |
795 | ||
248f219c DH |
796 | /* |
797 | * Kill all the calls on a socket and shut it down. | |
798 | */ | |
799 | static int rxrpc_shutdown(struct socket *sock, int flags) | |
800 | { | |
801 | struct sock *sk = sock->sk; | |
802 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
803 | int ret = 0; | |
804 | ||
805 | _enter("%p,%d", sk, flags); | |
806 | ||
807 | if (flags != SHUT_RDWR) | |
808 | return -EOPNOTSUPP; | |
809 | if (sk->sk_state == RXRPC_CLOSE) | |
810 | return -ESHUTDOWN; | |
811 | ||
812 | lock_sock(sk); | |
813 | ||
814 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
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 | } | |
821 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
822 | ||
823 | rxrpc_discard_prealloc(rx); | |
824 | ||
825 | release_sock(sk); | |
826 | return ret; | |
827 | } | |
828 | ||
17926a79 DH |
829 | /* |
830 | * RxRPC socket destructor | |
831 | */ | |
832 | static void rxrpc_sock_destructor(struct sock *sk) | |
833 | { | |
834 | _enter("%p", sk); | |
835 | ||
836 | rxrpc_purge_queue(&sk->sk_receive_queue); | |
837 | ||
14afee4b | 838 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
547b792c IJ |
839 | WARN_ON(!sk_unhashed(sk)); |
840 | WARN_ON(sk->sk_socket); | |
17926a79 DH |
841 | |
842 | if (!sock_flag(sk, SOCK_DEAD)) { | |
843 | printk("Attempt to release alive rxrpc socket: %p\n", sk); | |
844 | return; | |
845 | } | |
846 | } | |
847 | ||
848 | /* | |
849 | * release an RxRPC socket | |
850 | */ | |
851 | static int rxrpc_release_sock(struct sock *sk) | |
852 | { | |
853 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
854 | ||
41c6d650 | 855 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
17926a79 DH |
856 | |
857 | /* declare the socket closed for business */ | |
858 | sock_orphan(sk); | |
859 | sk->sk_shutdown = SHUTDOWN_MASK; | |
860 | ||
f859ab61 DH |
861 | /* We want to kill off all connections from a service socket |
862 | * as fast as possible because we can't share these; client | |
863 | * sockets, on the other hand, can share an endpoint. | |
864 | */ | |
865 | switch (sk->sk_state) { | |
866 | case RXRPC_SERVER_BOUND: | |
867 | case RXRPC_SERVER_BOUND2: | |
868 | case RXRPC_SERVER_LISTENING: | |
869 | case RXRPC_SERVER_LISTEN_DISABLED: | |
870 | rx->local->service_closed = true; | |
871 | break; | |
872 | } | |
873 | ||
17926a79 DH |
874 | spin_lock_bh(&sk->sk_receive_queue.lock); |
875 | sk->sk_state = RXRPC_CLOSE; | |
876 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
877 | ||
b63452c1 | 878 | if (rx->local && rcu_access_pointer(rx->local->service) == rx) { |
248f219c | 879 | write_lock(&rx->local->services_lock); |
b63452c1 | 880 | rcu_assign_pointer(rx->local->service, NULL); |
248f219c | 881 | write_unlock(&rx->local->services_lock); |
17926a79 DH |
882 | } |
883 | ||
884 | /* try to flush out this socket */ | |
00e90712 | 885 | rxrpc_discard_prealloc(rx); |
17926a79 | 886 | rxrpc_release_calls_on_socket(rx); |
651350d1 | 887 | flush_workqueue(rxrpc_workqueue); |
17926a79 DH |
888 | rxrpc_purge_queue(&sk->sk_receive_queue); |
889 | ||
730c5fd4 | 890 | rxrpc_unuse_local(rx->local); |
04d36d74 | 891 | rxrpc_put_local(rx->local); |
5627cc8b | 892 | rx->local = NULL; |
17926a79 DH |
893 | key_put(rx->key); |
894 | rx->key = NULL; | |
895 | key_put(rx->securities); | |
896 | rx->securities = NULL; | |
897 | sock_put(sk); | |
898 | ||
899 | _leave(" = 0"); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | /* | |
904 | * release an RxRPC BSD socket on close() or equivalent | |
905 | */ | |
906 | static int rxrpc_release(struct socket *sock) | |
907 | { | |
908 | struct sock *sk = sock->sk; | |
909 | ||
910 | _enter("%p{%p}", sock, sk); | |
911 | ||
912 | if (!sk) | |
913 | return 0; | |
914 | ||
915 | sock->sk = NULL; | |
916 | ||
917 | return rxrpc_release_sock(sk); | |
918 | } | |
919 | ||
920 | /* | |
921 | * RxRPC network protocol | |
922 | */ | |
923 | static const struct proto_ops rxrpc_rpc_ops = { | |
e33b3d97 | 924 | .family = PF_RXRPC, |
17926a79 DH |
925 | .owner = THIS_MODULE, |
926 | .release = rxrpc_release, | |
927 | .bind = rxrpc_bind, | |
928 | .connect = rxrpc_connect, | |
929 | .socketpair = sock_no_socketpair, | |
930 | .accept = sock_no_accept, | |
931 | .getname = sock_no_getname, | |
a11e1d43 | 932 | .poll = rxrpc_poll, |
17926a79 DH |
933 | .ioctl = sock_no_ioctl, |
934 | .listen = rxrpc_listen, | |
248f219c | 935 | .shutdown = rxrpc_shutdown, |
17926a79 | 936 | .setsockopt = rxrpc_setsockopt, |
515559ca | 937 | .getsockopt = rxrpc_getsockopt, |
17926a79 DH |
938 | .sendmsg = rxrpc_sendmsg, |
939 | .recvmsg = rxrpc_recvmsg, | |
940 | .mmap = sock_no_mmap, | |
941 | .sendpage = sock_no_sendpage, | |
942 | }; | |
943 | ||
944 | static struct proto rxrpc_proto = { | |
945 | .name = "RXRPC", | |
946 | .owner = THIS_MODULE, | |
947 | .obj_size = sizeof(struct rxrpc_sock), | |
0d12f8a4 | 948 | .max_header = sizeof(struct rxrpc_wire_header), |
17926a79 DH |
949 | }; |
950 | ||
ec1b4cf7 | 951 | static const struct net_proto_family rxrpc_family_ops = { |
17926a79 DH |
952 | .family = PF_RXRPC, |
953 | .create = rxrpc_create, | |
954 | .owner = THIS_MODULE, | |
955 | }; | |
956 | ||
957 | /* | |
958 | * initialise and register the RxRPC protocol | |
959 | */ | |
960 | static int __init af_rxrpc_init(void) | |
961 | { | |
17926a79 | 962 | int ret = -1; |
44430612 | 963 | unsigned int tmp; |
17926a79 | 964 | |
c593642c | 965 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof_field(struct sk_buff, cb)); |
17926a79 | 966 | |
44430612 MW |
967 | get_random_bytes(&tmp, sizeof(tmp)); |
968 | tmp &= 0x3fffffff; | |
969 | if (tmp == 0) | |
970 | tmp = 1; | |
971 | idr_set_cursor(&rxrpc_client_conn_ids, tmp); | |
17926a79 | 972 | |
651350d1 | 973 | ret = -ENOMEM; |
17926a79 DH |
974 | rxrpc_call_jar = kmem_cache_create( |
975 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, | |
20c2df83 | 976 | SLAB_HWCACHE_ALIGN, NULL); |
17926a79 | 977 | if (!rxrpc_call_jar) { |
9b6d5398 | 978 | pr_notice("Failed to allocate call jar\n"); |
17926a79 DH |
979 | goto error_call_jar; |
980 | } | |
981 | ||
e1fcc7e2 | 982 | rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1); |
651350d1 | 983 | if (!rxrpc_workqueue) { |
9b6d5398 | 984 | pr_notice("Failed to allocate work queue\n"); |
651350d1 DH |
985 | goto error_work_queue; |
986 | } | |
987 | ||
648af7fc DH |
988 | ret = rxrpc_init_security(); |
989 | if (ret < 0) { | |
9b6d5398 | 990 | pr_crit("Cannot initialise security\n"); |
648af7fc DH |
991 | goto error_security; |
992 | } | |
993 | ||
5399d522 | 994 | ret = register_pernet_device(&rxrpc_net_ops); |
2baec2c3 DH |
995 | if (ret) |
996 | goto error_pernet; | |
997 | ||
17926a79 | 998 | ret = proto_register(&rxrpc_proto, 1); |
1c899641 | 999 | if (ret < 0) { |
9b6d5398 | 1000 | pr_crit("Cannot register protocol\n"); |
17926a79 DH |
1001 | goto error_proto; |
1002 | } | |
1003 | ||
1004 | ret = sock_register(&rxrpc_family_ops); | |
1005 | if (ret < 0) { | |
9b6d5398 | 1006 | pr_crit("Cannot register socket family\n"); |
17926a79 DH |
1007 | goto error_sock; |
1008 | } | |
1009 | ||
1010 | ret = register_key_type(&key_type_rxrpc); | |
1011 | if (ret < 0) { | |
9b6d5398 | 1012 | pr_crit("Cannot register client key type\n"); |
17926a79 DH |
1013 | goto error_key_type; |
1014 | } | |
1015 | ||
1016 | ret = register_key_type(&key_type_rxrpc_s); | |
1017 | if (ret < 0) { | |
9b6d5398 | 1018 | pr_crit("Cannot register server key type\n"); |
17926a79 DH |
1019 | goto error_key_type_s; |
1020 | } | |
1021 | ||
5873c083 DH |
1022 | ret = rxrpc_sysctl_init(); |
1023 | if (ret < 0) { | |
9b6d5398 | 1024 | pr_crit("Cannot register sysctls\n"); |
5873c083 DH |
1025 | goto error_sysctls; |
1026 | } | |
1027 | ||
17926a79 DH |
1028 | return 0; |
1029 | ||
5873c083 DH |
1030 | error_sysctls: |
1031 | unregister_key_type(&key_type_rxrpc_s); | |
17926a79 DH |
1032 | error_key_type_s: |
1033 | unregister_key_type(&key_type_rxrpc); | |
1034 | error_key_type: | |
1035 | sock_unregister(PF_RXRPC); | |
1036 | error_sock: | |
1037 | proto_unregister(&rxrpc_proto); | |
1038 | error_proto: | |
5399d522 | 1039 | unregister_pernet_device(&rxrpc_net_ops); |
2baec2c3 | 1040 | error_pernet: |
648af7fc | 1041 | rxrpc_exit_security(); |
8addc044 WY |
1042 | error_security: |
1043 | destroy_workqueue(rxrpc_workqueue); | |
651350d1 | 1044 | error_work_queue: |
17926a79 DH |
1045 | kmem_cache_destroy(rxrpc_call_jar); |
1046 | error_call_jar: | |
1047 | return ret; | |
1048 | } | |
1049 | ||
1050 | /* | |
1051 | * unregister the RxRPC protocol | |
1052 | */ | |
1053 | static void __exit af_rxrpc_exit(void) | |
1054 | { | |
1055 | _enter(""); | |
5873c083 | 1056 | rxrpc_sysctl_exit(); |
17926a79 DH |
1057 | unregister_key_type(&key_type_rxrpc_s); |
1058 | unregister_key_type(&key_type_rxrpc); | |
1059 | sock_unregister(PF_RXRPC); | |
1060 | proto_unregister(&rxrpc_proto); | |
5399d522 | 1061 | unregister_pernet_device(&rxrpc_net_ops); |
71f3ca40 DH |
1062 | ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0); |
1063 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); | |
4f95dd78 | 1064 | |
2baec2c3 DH |
1065 | /* Make sure the local and peer records pinned by any dying connections |
1066 | * are released. | |
1067 | */ | |
1068 | rcu_barrier(); | |
1069 | rxrpc_destroy_client_conn_ids(); | |
1070 | ||
651350d1 | 1071 | destroy_workqueue(rxrpc_workqueue); |
648af7fc | 1072 | rxrpc_exit_security(); |
17926a79 DH |
1073 | kmem_cache_destroy(rxrpc_call_jar); |
1074 | _leave(""); | |
1075 | } | |
1076 | ||
1077 | module_init(af_rxrpc_init); | |
1078 | module_exit(af_rxrpc_exit); |