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 */ | |
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) |
db099c62 | 268 | * @hard_timeout: The maximum lifespan of the call in sec |
d001648e DH |
269 | * @gfp: The allocation constraints |
270 | * @notify_rx: Where to send notifications instead of socket queue | |
a68f4a27 | 271 | * @upgrade: Request service upgrade for call |
76f2fe73 | 272 | * @interruptibility: The call is interruptible, or can be canceled. |
a25e21f0 | 273 | * @debug_id: The debug ID for tracing to be assigned to the call |
651350d1 DH |
274 | * |
275 | * Allow a kernel service to begin a call on the nominated socket. This just | |
276 | * sets up all the internal tracking structures and allocates connection and | |
277 | * call IDs as appropriate. The call to be used is returned. | |
278 | * | |
279 | * The default socket destination address and security may be overridden by | |
280 | * supplying @srx and @key. | |
281 | */ | |
282 | struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, | |
283 | struct sockaddr_rxrpc *srx, | |
284 | struct key *key, | |
285 | unsigned long user_call_ID, | |
e754eba6 | 286 | s64 tx_total_len, |
db099c62 | 287 | u32 hard_timeout, |
d001648e | 288 | gfp_t gfp, |
a68f4a27 | 289 | rxrpc_notify_rx_t notify_rx, |
a25e21f0 | 290 | bool upgrade, |
e138aa7d | 291 | enum rxrpc_interruptibility interruptibility, |
a25e21f0 | 292 | unsigned int debug_id) |
651350d1 | 293 | { |
19ffa01c | 294 | struct rxrpc_conn_parameters cp; |
48124178 | 295 | struct rxrpc_call_params p; |
651350d1 DH |
296 | struct rxrpc_call *call; |
297 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
f4552c2d | 298 | int ret; |
651350d1 DH |
299 | |
300 | _enter(",,%x,%lx", key_serial(key), user_call_ID); | |
301 | ||
f4552c2d DH |
302 | ret = rxrpc_validate_address(rx, srx, sizeof(*srx)); |
303 | if (ret < 0) | |
304 | return ERR_PTR(ret); | |
305 | ||
651350d1 DH |
306 | lock_sock(&rx->sk); |
307 | ||
19ffa01c DH |
308 | if (!key) |
309 | key = rx->key; | |
310 | if (key && !key->payload.data[0]) | |
311 | key = NULL; /* a no-security key */ | |
312 | ||
48124178 | 313 | memset(&p, 0, sizeof(p)); |
b7a7d674 DH |
314 | p.user_call_ID = user_call_ID; |
315 | p.tx_total_len = tx_total_len; | |
316 | p.interruptibility = interruptibility; | |
317 | p.kernel = true; | |
db099c62 | 318 | p.timeouts.hard = hard_timeout; |
48124178 | 319 | |
19ffa01c DH |
320 | memset(&cp, 0, sizeof(cp)); |
321 | cp.local = rx->local; | |
322 | cp.key = key; | |
93864fc3 | 323 | cp.security_level = rx->min_sec_level; |
19ffa01c | 324 | cp.exclusive = false; |
a68f4a27 | 325 | cp.upgrade = upgrade; |
19ffa01c | 326 | cp.service_id = srx->srx_service; |
a25e21f0 | 327 | call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id); |
540b1c48 | 328 | /* The socket has been unlocked. */ |
6cb3ece9 | 329 | if (!IS_ERR(call)) { |
d001648e | 330 | call->notify_rx = notify_rx; |
6cb3ece9 DH |
331 | mutex_unlock(&call->user_mutex); |
332 | } | |
19ffa01c | 333 | |
651350d1 DH |
334 | _leave(" = %p", call); |
335 | return call; | |
336 | } | |
651350d1 DH |
337 | EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
338 | ||
20acbd9a DH |
339 | /* |
340 | * Dummy function used to stop the notifier talking to recvmsg(). | |
341 | */ | |
342 | static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall, | |
343 | unsigned long call_user_ID) | |
344 | { | |
345 | } | |
346 | ||
651350d1 | 347 | /** |
e0416e7d | 348 | * rxrpc_kernel_shutdown_call - Allow a kernel service to shut down a call it was using |
4de48af6 | 349 | * @sock: The socket the call is on |
651350d1 DH |
350 | * @call: The call to end |
351 | * | |
e0416e7d | 352 | * Allow a kernel service to shut down a call it was using. The call must be |
651350d1 DH |
353 | * complete before this is called (the call should be aborted if necessary). |
354 | */ | |
e0416e7d | 355 | void rxrpc_kernel_shutdown_call(struct socket *sock, struct rxrpc_call *call) |
651350d1 | 356 | { |
a0575429 | 357 | _enter("%d{%d}", call->debug_id, refcount_read(&call->ref)); |
540b1c48 DH |
358 | |
359 | mutex_lock(&call->user_mutex); | |
e0416e7d DH |
360 | if (!test_bit(RXRPC_CALL_RELEASED, &call->flags)) { |
361 | rxrpc_release_call(rxrpc_sk(sock->sk), call); | |
362 | ||
363 | /* Make sure we're not going to call back into a kernel service */ | |
364 | if (call->notify_rx) { | |
365 | spin_lock(&call->notify_lock); | |
366 | call->notify_rx = rxrpc_dummy_notify_rx; | |
367 | spin_unlock(&call->notify_lock); | |
368 | } | |
20acbd9a | 369 | } |
540b1c48 | 370 | mutex_unlock(&call->user_mutex); |
e0416e7d DH |
371 | } |
372 | EXPORT_SYMBOL(rxrpc_kernel_shutdown_call); | |
373 | ||
374 | /** | |
375 | * rxrpc_kernel_put_call - Release a reference to a call | |
376 | * @sock: The socket the call is on | |
377 | * @call: The call to put | |
378 | * | |
379 | * Drop the application's ref on an rxrpc call. | |
380 | */ | |
381 | void rxrpc_kernel_put_call(struct socket *sock, struct rxrpc_call *call) | |
382 | { | |
cbd00891 | 383 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
651350d1 | 384 | } |
e0416e7d | 385 | EXPORT_SYMBOL(rxrpc_kernel_put_call); |
651350d1 | 386 | |
f4d15fb6 DH |
387 | /** |
388 | * rxrpc_kernel_check_life - Check to see whether a call is still alive | |
389 | * @sock: The socket the call is on | |
390 | * @call: The call to check | |
391 | * | |
93368b6b DH |
392 | * Allow a kernel service to find out whether a call is still alive - whether |
393 | * it has completed successfully and all received data has been consumed. | |
f4d15fb6 | 394 | */ |
4611da30 | 395 | bool rxrpc_kernel_check_life(const struct socket *sock, |
7d7587db | 396 | const struct rxrpc_call *call) |
f4d15fb6 | 397 | { |
93368b6b DH |
398 | if (!rxrpc_call_is_complete(call)) |
399 | return true; | |
400 | if (call->completion != RXRPC_CALL_SUCCEEDED) | |
401 | return false; | |
402 | return !skb_queue_empty(&call->recvmsg_queue); | |
f4d15fb6 DH |
403 | } |
404 | EXPORT_SYMBOL(rxrpc_kernel_check_life); | |
405 | ||
e908bcf4 DH |
406 | /** |
407 | * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call. | |
408 | * @sock: The socket the call is on | |
409 | * @call: The call to query | |
410 | * | |
411 | * Allow a kernel service to retrieve the epoch value from a service call to | |
412 | * see if the client at the other end rebooted. | |
413 | */ | |
414 | u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call) | |
415 | { | |
416 | return call->conn->proto.epoch; | |
417 | } | |
418 | EXPORT_SYMBOL(rxrpc_kernel_get_epoch); | |
419 | ||
651350d1 | 420 | /** |
d001648e | 421 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
651350d1 | 422 | * @sock: The socket to intercept received messages on |
d001648e | 423 | * @notify_new_call: Function to be called when new calls appear |
00e90712 | 424 | * @discard_new_call: Function to discard preallocated calls |
651350d1 | 425 | * |
d001648e | 426 | * Allow a kernel service to be given notifications about new calls. |
651350d1 | 427 | */ |
d001648e DH |
428 | void rxrpc_kernel_new_call_notification( |
429 | struct socket *sock, | |
00e90712 DH |
430 | rxrpc_notify_new_call_t notify_new_call, |
431 | rxrpc_discard_new_call_t discard_new_call) | |
651350d1 DH |
432 | { |
433 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
434 | ||
d001648e | 435 | rx->notify_new_call = notify_new_call; |
00e90712 | 436 | rx->discard_new_call = discard_new_call; |
651350d1 | 437 | } |
d001648e | 438 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
651350d1 | 439 | |
bbd172e3 DH |
440 | /** |
441 | * rxrpc_kernel_set_max_life - Set maximum lifespan on a call | |
442 | * @sock: The socket the call is on | |
443 | * @call: The call to configure | |
444 | * @hard_timeout: The maximum lifespan of the call in jiffies | |
445 | * | |
446 | * Set the maximum lifespan of a call. The call will end with ETIME or | |
447 | * ETIMEDOUT if it takes longer than this. | |
448 | */ | |
449 | void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call, | |
450 | unsigned long hard_timeout) | |
451 | { | |
452 | unsigned long now; | |
453 | ||
454 | mutex_lock(&call->user_mutex); | |
455 | ||
456 | now = jiffies; | |
457 | hard_timeout += now; | |
458 | WRITE_ONCE(call->expect_term_by, hard_timeout); | |
459 | rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard); | |
460 | ||
461 | mutex_unlock(&call->user_mutex); | |
462 | } | |
463 | EXPORT_SYMBOL(rxrpc_kernel_set_max_life); | |
464 | ||
17926a79 DH |
465 | /* |
466 | * connect an RxRPC socket | |
467 | * - this just targets it at a specific destination; no actual connection | |
468 | * negotiation takes place | |
469 | */ | |
470 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, | |
471 | int addr_len, int flags) | |
472 | { | |
2341e077 DH |
473 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
474 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
17926a79 DH |
475 | int ret; |
476 | ||
477 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); | |
478 | ||
479 | ret = rxrpc_validate_address(rx, srx, addr_len); | |
480 | if (ret < 0) { | |
481 | _leave(" = %d [bad addr]", ret); | |
482 | return ret; | |
483 | } | |
484 | ||
485 | lock_sock(&rx->sk); | |
486 | ||
2341e077 DH |
487 | ret = -EISCONN; |
488 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) | |
489 | goto error; | |
490 | ||
17926a79 | 491 | switch (rx->sk.sk_state) { |
2341e077 DH |
492 | case RXRPC_UNBOUND: |
493 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
40e67c12 | 494 | break; |
2341e077 | 495 | case RXRPC_CLIENT_UNBOUND: |
17926a79 DH |
496 | case RXRPC_CLIENT_BOUND: |
497 | break; | |
17926a79 | 498 | default: |
2341e077 DH |
499 | ret = -EBUSY; |
500 | goto error; | |
17926a79 DH |
501 | } |
502 | ||
2341e077 DH |
503 | rx->connect_srx = *srx; |
504 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); | |
505 | ret = 0; | |
17926a79 | 506 | |
2341e077 | 507 | error: |
17926a79 | 508 | release_sock(&rx->sk); |
2341e077 | 509 | return ret; |
17926a79 DH |
510 | } |
511 | ||
512 | /* | |
513 | * send a message through an RxRPC socket | |
514 | * - in a client this does a number of things: | |
515 | * - finds/sets up a connection for the security specified (if any) | |
516 | * - initiates a call (ID in control data) | |
517 | * - ends the request phase of a call (if MSG_MORE is not set) | |
518 | * - sends a call data packet | |
519 | * - may send an abort (abort code in control data) | |
520 | */ | |
1b784140 | 521 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
17926a79 | 522 | { |
2341e077 | 523 | struct rxrpc_local *local; |
17926a79 DH |
524 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
525 | int ret; | |
526 | ||
527 | _enter(",{%d},,%zu", rx->sk.sk_state, len); | |
528 | ||
529 | if (m->msg_flags & MSG_OOB) | |
530 | return -EOPNOTSUPP; | |
531 | ||
532 | if (m->msg_name) { | |
533 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); | |
534 | if (ret < 0) { | |
535 | _leave(" = %d [bad addr]", ret); | |
536 | return ret; | |
537 | } | |
538 | } | |
539 | ||
17926a79 DH |
540 | lock_sock(&rx->sk); |
541 | ||
17926a79 | 542 | switch (rx->sk.sk_state) { |
2341e077 | 543 | case RXRPC_UNBOUND: |
e835ada0 | 544 | case RXRPC_CLIENT_UNBOUND: |
cd5892c7 DH |
545 | rx->srx.srx_family = AF_RXRPC; |
546 | rx->srx.srx_service = 0; | |
547 | rx->srx.transport_type = SOCK_DGRAM; | |
548 | rx->srx.transport.family = rx->family; | |
549 | switch (rx->family) { | |
550 | case AF_INET: | |
551 | rx->srx.transport_len = sizeof(struct sockaddr_in); | |
552 | break; | |
d1912747 | 553 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
554 | case AF_INET6: |
555 | rx->srx.transport_len = sizeof(struct sockaddr_in6); | |
556 | break; | |
d1912747 | 557 | #endif |
cd5892c7 DH |
558 | default: |
559 | ret = -EAFNOSUPPORT; | |
560 | goto error_unlock; | |
561 | } | |
2baec2c3 | 562 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
2341e077 DH |
563 | if (IS_ERR(local)) { |
564 | ret = PTR_ERR(local); | |
565 | goto error_unlock; | |
17926a79 | 566 | } |
2341e077 DH |
567 | |
568 | rx->local = local; | |
e835ada0 | 569 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; |
df561f66 | 570 | fallthrough; |
2341e077 | 571 | |
17926a79 | 572 | case RXRPC_CLIENT_BOUND: |
2341e077 DH |
573 | if (!m->msg_name && |
574 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { | |
575 | m->msg_name = &rx->connect_srx; | |
576 | m->msg_namelen = sizeof(rx->connect_srx); | |
17926a79 | 577 | } |
df561f66 | 578 | fallthrough; |
2341e077 DH |
579 | case RXRPC_SERVER_BOUND: |
580 | case RXRPC_SERVER_LISTENING: | |
581 | ret = rxrpc_do_sendmsg(rx, m, len); | |
540b1c48 DH |
582 | /* The socket has been unlocked */ |
583 | goto out; | |
17926a79 | 584 | default: |
2341e077 | 585 | ret = -EINVAL; |
540b1c48 | 586 | goto error_unlock; |
17926a79 DH |
587 | } |
588 | ||
2341e077 | 589 | error_unlock: |
17926a79 | 590 | release_sock(&rx->sk); |
540b1c48 | 591 | out: |
17926a79 DH |
592 | _leave(" = %d", ret); |
593 | return ret; | |
594 | } | |
595 | ||
298cd88a CH |
596 | int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val) |
597 | { | |
598 | if (sk->sk_state != RXRPC_UNBOUND) | |
599 | return -EISCONN; | |
600 | if (val > RXRPC_SECURITY_MAX) | |
601 | return -EINVAL; | |
602 | lock_sock(sk); | |
603 | rxrpc_sk(sk)->min_sec_level = val; | |
604 | release_sock(sk); | |
605 | return 0; | |
606 | } | |
607 | EXPORT_SYMBOL(rxrpc_sock_set_min_security_level); | |
608 | ||
17926a79 DH |
609 | /* |
610 | * set RxRPC socket options | |
611 | */ | |
612 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, | |
a7b75c5a | 613 | sockptr_t optval, unsigned int optlen) |
17926a79 DH |
614 | { |
615 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
95c96174 | 616 | unsigned int min_sec_level; |
4722974d | 617 | u16 service_upgrade[2]; |
17926a79 DH |
618 | int ret; |
619 | ||
620 | _enter(",%d,%d,,%d", level, optname, optlen); | |
621 | ||
622 | lock_sock(&rx->sk); | |
623 | ret = -EOPNOTSUPP; | |
624 | ||
625 | if (level == SOL_RXRPC) { | |
626 | switch (optname) { | |
627 | case RXRPC_EXCLUSIVE_CONNECTION: | |
628 | ret = -EINVAL; | |
629 | if (optlen != 0) | |
630 | goto error; | |
631 | ret = -EISCONN; | |
2341e077 | 632 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 633 | goto error; |
cc8feb8e | 634 | rx->exclusive = true; |
17926a79 DH |
635 | goto success; |
636 | ||
637 | case RXRPC_SECURITY_KEY: | |
638 | ret = -EINVAL; | |
639 | if (rx->key) | |
640 | goto error; | |
641 | ret = -EISCONN; | |
2341e077 | 642 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
643 | goto error; |
644 | ret = rxrpc_request_key(rx, optval, optlen); | |
645 | goto error; | |
646 | ||
647 | case RXRPC_SECURITY_KEYRING: | |
648 | ret = -EINVAL; | |
649 | if (rx->key) | |
650 | goto error; | |
651 | ret = -EISCONN; | |
2341e077 | 652 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
653 | goto error; |
654 | ret = rxrpc_server_keyring(rx, optval, optlen); | |
655 | goto error; | |
656 | ||
657 | case RXRPC_MIN_SECURITY_LEVEL: | |
658 | ret = -EINVAL; | |
95c96174 | 659 | if (optlen != sizeof(unsigned int)) |
17926a79 DH |
660 | goto error; |
661 | ret = -EISCONN; | |
2341e077 | 662 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 663 | goto error; |
a7b75c5a CH |
664 | ret = copy_from_sockptr(&min_sec_level, optval, |
665 | sizeof(unsigned int)); | |
17926a79 DH |
666 | if (ret < 0) |
667 | goto error; | |
668 | ret = -EINVAL; | |
669 | if (min_sec_level > RXRPC_SECURITY_MAX) | |
670 | goto error; | |
671 | rx->min_sec_level = min_sec_level; | |
672 | goto success; | |
673 | ||
4722974d DH |
674 | case RXRPC_UPGRADEABLE_SERVICE: |
675 | ret = -EINVAL; | |
676 | if (optlen != sizeof(service_upgrade) || | |
677 | rx->service_upgrade.from != 0) | |
678 | goto error; | |
679 | ret = -EISCONN; | |
680 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) | |
681 | goto error; | |
682 | ret = -EFAULT; | |
a7b75c5a | 683 | if (copy_from_sockptr(service_upgrade, optval, |
4722974d DH |
684 | sizeof(service_upgrade)) != 0) |
685 | goto error; | |
686 | ret = -EINVAL; | |
687 | if ((service_upgrade[0] != rx->srx.srx_service || | |
688 | service_upgrade[1] != rx->second_service) && | |
689 | (service_upgrade[0] != rx->second_service || | |
690 | service_upgrade[1] != rx->srx.srx_service)) | |
691 | goto error; | |
692 | rx->service_upgrade.from = service_upgrade[0]; | |
693 | rx->service_upgrade.to = service_upgrade[1]; | |
694 | goto success; | |
695 | ||
17926a79 DH |
696 | default: |
697 | break; | |
698 | } | |
699 | } | |
700 | ||
701 | success: | |
702 | ret = 0; | |
703 | error: | |
704 | release_sock(&rx->sk); | |
705 | return ret; | |
706 | } | |
707 | ||
515559ca DH |
708 | /* |
709 | * Get socket options. | |
710 | */ | |
711 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, | |
712 | char __user *optval, int __user *_optlen) | |
713 | { | |
714 | int optlen; | |
3ec0efde | 715 | |
515559ca DH |
716 | if (level != SOL_RXRPC) |
717 | return -EOPNOTSUPP; | |
718 | ||
719 | if (get_user(optlen, _optlen)) | |
720 | return -EFAULT; | |
3ec0efde | 721 | |
515559ca DH |
722 | switch (optname) { |
723 | case RXRPC_SUPPORTED_CMSG: | |
724 | if (optlen < sizeof(int)) | |
725 | return -ETOOSMALL; | |
726 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || | |
727 | put_user(sizeof(int), _optlen)) | |
728 | return -EFAULT; | |
729 | return 0; | |
3ec0efde | 730 | |
515559ca DH |
731 | default: |
732 | return -EOPNOTSUPP; | |
733 | } | |
734 | } | |
735 | ||
17926a79 DH |
736 | /* |
737 | * permit an RxRPC socket to be polled | |
738 | */ | |
a11e1d43 LT |
739 | static __poll_t rxrpc_poll(struct file *file, struct socket *sock, |
740 | poll_table *wait) | |
17926a79 | 741 | { |
17926a79 | 742 | struct sock *sk = sock->sk; |
248f219c | 743 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
a11e1d43 LT |
744 | __poll_t mask; |
745 | ||
89ab066d | 746 | sock_poll_wait(file, sock, wait); |
a11e1d43 | 747 | mask = 0; |
17926a79 DH |
748 | |
749 | /* the socket is readable if there are any messages waiting on the Rx | |
750 | * queue */ | |
248f219c | 751 | if (!list_empty(&rx->recvmsg_q)) |
a9a08845 | 752 | mask |= EPOLLIN | EPOLLRDNORM; |
17926a79 DH |
753 | |
754 | /* the socket is writable if there is space to add new data to the | |
755 | * socket; there is no guarantee that any particular call in progress | |
756 | * on the socket may have space in the Tx ACK window */ | |
757 | if (rxrpc_writable(sk)) | |
a9a08845 | 758 | mask |= EPOLLOUT | EPOLLWRNORM; |
17926a79 DH |
759 | |
760 | return mask; | |
761 | } | |
762 | ||
763 | /* | |
764 | * create an RxRPC socket | |
765 | */ | |
3f378b68 EP |
766 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
767 | int kern) | |
17926a79 | 768 | { |
ace45bec | 769 | struct rxrpc_net *rxnet; |
17926a79 DH |
770 | struct rxrpc_sock *rx; |
771 | struct sock *sk; | |
772 | ||
773 | _enter("%p,%d", sock, protocol); | |
774 | ||
b4f1342f | 775 | /* we support transport protocol UDP/UDP6 only */ |
d1912747 DH |
776 | if (protocol != PF_INET && |
777 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) | |
17926a79 DH |
778 | return -EPROTONOSUPPORT; |
779 | ||
780 | if (sock->type != SOCK_DGRAM) | |
781 | return -ESOCKTNOSUPPORT; | |
782 | ||
783 | sock->ops = &rxrpc_rpc_ops; | |
784 | sock->state = SS_UNCONNECTED; | |
785 | ||
11aa9c28 | 786 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
17926a79 DH |
787 | if (!sk) |
788 | return -ENOMEM; | |
789 | ||
790 | sock_init_data(sock, sk); | |
8d94aa38 | 791 | sock_set_flag(sk, SOCK_RCU_FREE); |
2341e077 | 792 | sk->sk_state = RXRPC_UNBOUND; |
17926a79 | 793 | sk->sk_write_space = rxrpc_write_space; |
0e119b41 | 794 | sk->sk_max_ack_backlog = 0; |
17926a79 DH |
795 | sk->sk_destruct = rxrpc_sock_destructor; |
796 | ||
797 | rx = rxrpc_sk(sk); | |
19ffa01c | 798 | rx->family = protocol; |
17926a79 DH |
799 | rx->calls = RB_ROOT; |
800 | ||
248f219c DH |
801 | spin_lock_init(&rx->incoming_lock); |
802 | INIT_LIST_HEAD(&rx->sock_calls); | |
803 | INIT_LIST_HEAD(&rx->to_be_accepted); | |
804 | INIT_LIST_HEAD(&rx->recvmsg_q); | |
223f5901 | 805 | spin_lock_init(&rx->recvmsg_lock); |
17926a79 DH |
806 | rwlock_init(&rx->call_lock); |
807 | memset(&rx->srx, 0, sizeof(rx->srx)); | |
808 | ||
ace45bec DH |
809 | rxnet = rxrpc_net(sock_net(&rx->sk)); |
810 | timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1); | |
811 | ||
17926a79 DH |
812 | _leave(" = 0 [%p]", rx); |
813 | return 0; | |
814 | } | |
815 | ||
248f219c DH |
816 | /* |
817 | * Kill all the calls on a socket and shut it down. | |
818 | */ | |
819 | static int rxrpc_shutdown(struct socket *sock, int flags) | |
820 | { | |
821 | struct sock *sk = sock->sk; | |
822 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
823 | int ret = 0; | |
824 | ||
825 | _enter("%p,%d", sk, flags); | |
826 | ||
827 | if (flags != SHUT_RDWR) | |
828 | return -EOPNOTSUPP; | |
829 | if (sk->sk_state == RXRPC_CLOSE) | |
830 | return -ESHUTDOWN; | |
831 | ||
832 | lock_sock(sk); | |
833 | ||
248f219c DH |
834 | if (sk->sk_state < RXRPC_CLOSE) { |
835 | sk->sk_state = RXRPC_CLOSE; | |
836 | sk->sk_shutdown = SHUTDOWN_MASK; | |
837 | } else { | |
838 | ret = -ESHUTDOWN; | |
839 | } | |
248f219c DH |
840 | |
841 | rxrpc_discard_prealloc(rx); | |
842 | ||
843 | release_sock(sk); | |
844 | return ret; | |
845 | } | |
846 | ||
17926a79 DH |
847 | /* |
848 | * RxRPC socket destructor | |
849 | */ | |
850 | static void rxrpc_sock_destructor(struct sock *sk) | |
851 | { | |
852 | _enter("%p", sk); | |
853 | ||
854 | rxrpc_purge_queue(&sk->sk_receive_queue); | |
855 | ||
14afee4b | 856 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
547b792c IJ |
857 | WARN_ON(!sk_unhashed(sk)); |
858 | WARN_ON(sk->sk_socket); | |
17926a79 DH |
859 | |
860 | if (!sock_flag(sk, SOCK_DEAD)) { | |
861 | printk("Attempt to release alive rxrpc socket: %p\n", sk); | |
862 | return; | |
863 | } | |
864 | } | |
865 | ||
866 | /* | |
867 | * release an RxRPC socket | |
868 | */ | |
869 | static int rxrpc_release_sock(struct sock *sk) | |
870 | { | |
871 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
872 | ||
41c6d650 | 873 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
17926a79 DH |
874 | |
875 | /* declare the socket closed for business */ | |
876 | sock_orphan(sk); | |
877 | sk->sk_shutdown = SHUTDOWN_MASK; | |
878 | ||
f859ab61 DH |
879 | /* We want to kill off all connections from a service socket |
880 | * as fast as possible because we can't share these; client | |
881 | * sockets, on the other hand, can share an endpoint. | |
882 | */ | |
883 | switch (sk->sk_state) { | |
884 | case RXRPC_SERVER_BOUND: | |
885 | case RXRPC_SERVER_BOUND2: | |
886 | case RXRPC_SERVER_LISTENING: | |
887 | case RXRPC_SERVER_LISTEN_DISABLED: | |
888 | rx->local->service_closed = true; | |
889 | break; | |
890 | } | |
891 | ||
17926a79 | 892 | sk->sk_state = RXRPC_CLOSE; |
17926a79 | 893 | |
42f229c3 | 894 | if (rx->local && rx->local->service == rx) { |
248f219c | 895 | write_lock(&rx->local->services_lock); |
42f229c3 | 896 | rx->local->service = NULL; |
248f219c | 897 | write_unlock(&rx->local->services_lock); |
17926a79 DH |
898 | } |
899 | ||
900 | /* try to flush out this socket */ | |
00e90712 | 901 | rxrpc_discard_prealloc(rx); |
17926a79 | 902 | rxrpc_release_calls_on_socket(rx); |
651350d1 | 903 | flush_workqueue(rxrpc_workqueue); |
17926a79 DH |
904 | rxrpc_purge_queue(&sk->sk_receive_queue); |
905 | ||
0fde882f DH |
906 | rxrpc_unuse_local(rx->local, rxrpc_local_unuse_release_sock); |
907 | rxrpc_put_local(rx->local, rxrpc_local_put_release_sock); | |
5627cc8b | 908 | rx->local = NULL; |
17926a79 DH |
909 | key_put(rx->key); |
910 | rx->key = NULL; | |
911 | key_put(rx->securities); | |
912 | rx->securities = NULL; | |
913 | sock_put(sk); | |
914 | ||
915 | _leave(" = 0"); | |
916 | return 0; | |
917 | } | |
918 | ||
919 | /* | |
920 | * release an RxRPC BSD socket on close() or equivalent | |
921 | */ | |
922 | static int rxrpc_release(struct socket *sock) | |
923 | { | |
924 | struct sock *sk = sock->sk; | |
925 | ||
926 | _enter("%p{%p}", sock, sk); | |
927 | ||
928 | if (!sk) | |
929 | return 0; | |
930 | ||
931 | sock->sk = NULL; | |
932 | ||
933 | return rxrpc_release_sock(sk); | |
934 | } | |
935 | ||
936 | /* | |
937 | * RxRPC network protocol | |
938 | */ | |
939 | static const struct proto_ops rxrpc_rpc_ops = { | |
e33b3d97 | 940 | .family = PF_RXRPC, |
17926a79 DH |
941 | .owner = THIS_MODULE, |
942 | .release = rxrpc_release, | |
943 | .bind = rxrpc_bind, | |
944 | .connect = rxrpc_connect, | |
945 | .socketpair = sock_no_socketpair, | |
946 | .accept = sock_no_accept, | |
947 | .getname = sock_no_getname, | |
a11e1d43 | 948 | .poll = rxrpc_poll, |
17926a79 DH |
949 | .ioctl = sock_no_ioctl, |
950 | .listen = rxrpc_listen, | |
248f219c | 951 | .shutdown = rxrpc_shutdown, |
17926a79 | 952 | .setsockopt = rxrpc_setsockopt, |
515559ca | 953 | .getsockopt = rxrpc_getsockopt, |
17926a79 DH |
954 | .sendmsg = rxrpc_sendmsg, |
955 | .recvmsg = rxrpc_recvmsg, | |
956 | .mmap = sock_no_mmap, | |
17926a79 DH |
957 | }; |
958 | ||
959 | static struct proto rxrpc_proto = { | |
960 | .name = "RXRPC", | |
961 | .owner = THIS_MODULE, | |
962 | .obj_size = sizeof(struct rxrpc_sock), | |
0d12f8a4 | 963 | .max_header = sizeof(struct rxrpc_wire_header), |
17926a79 DH |
964 | }; |
965 | ||
ec1b4cf7 | 966 | static const struct net_proto_family rxrpc_family_ops = { |
17926a79 DH |
967 | .family = PF_RXRPC, |
968 | .create = rxrpc_create, | |
969 | .owner = THIS_MODULE, | |
970 | }; | |
971 | ||
972 | /* | |
973 | * initialise and register the RxRPC protocol | |
974 | */ | |
975 | static int __init af_rxrpc_init(void) | |
976 | { | |
17926a79 DH |
977 | int ret = -1; |
978 | ||
c593642c | 979 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof_field(struct sk_buff, cb)); |
17926a79 | 980 | |
651350d1 | 981 | ret = -ENOMEM; |
020c69c1 | 982 | rxrpc_gen_version_string(); |
17926a79 DH |
983 | rxrpc_call_jar = kmem_cache_create( |
984 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, | |
20c2df83 | 985 | SLAB_HWCACHE_ALIGN, NULL); |
17926a79 | 986 | if (!rxrpc_call_jar) { |
9b6d5398 | 987 | pr_notice("Failed to allocate call jar\n"); |
17926a79 DH |
988 | goto error_call_jar; |
989 | } | |
990 | ||
78ef9703 | 991 | rxrpc_workqueue = alloc_ordered_workqueue("krxrpcd", WQ_HIGHPRI | WQ_MEM_RECLAIM); |
651350d1 | 992 | if (!rxrpc_workqueue) { |
9b6d5398 | 993 | pr_notice("Failed to allocate work queue\n"); |
651350d1 DH |
994 | goto error_work_queue; |
995 | } | |
996 | ||
648af7fc DH |
997 | ret = rxrpc_init_security(); |
998 | if (ret < 0) { | |
9b6d5398 | 999 | pr_crit("Cannot initialise security\n"); |
648af7fc DH |
1000 | goto error_security; |
1001 | } | |
1002 | ||
5399d522 | 1003 | ret = register_pernet_device(&rxrpc_net_ops); |
2baec2c3 DH |
1004 | if (ret) |
1005 | goto error_pernet; | |
1006 | ||
17926a79 | 1007 | ret = proto_register(&rxrpc_proto, 1); |
1c899641 | 1008 | if (ret < 0) { |
9b6d5398 | 1009 | pr_crit("Cannot register protocol\n"); |
17926a79 DH |
1010 | goto error_proto; |
1011 | } | |
1012 | ||
1013 | ret = sock_register(&rxrpc_family_ops); | |
1014 | if (ret < 0) { | |
9b6d5398 | 1015 | pr_crit("Cannot register socket family\n"); |
17926a79 DH |
1016 | goto error_sock; |
1017 | } | |
1018 | ||
1019 | ret = register_key_type(&key_type_rxrpc); | |
1020 | if (ret < 0) { | |
9b6d5398 | 1021 | pr_crit("Cannot register client key type\n"); |
17926a79 DH |
1022 | goto error_key_type; |
1023 | } | |
1024 | ||
1025 | ret = register_key_type(&key_type_rxrpc_s); | |
1026 | if (ret < 0) { | |
9b6d5398 | 1027 | pr_crit("Cannot register server key type\n"); |
17926a79 DH |
1028 | goto error_key_type_s; |
1029 | } | |
1030 | ||
5873c083 DH |
1031 | ret = rxrpc_sysctl_init(); |
1032 | if (ret < 0) { | |
9b6d5398 | 1033 | pr_crit("Cannot register sysctls\n"); |
5873c083 DH |
1034 | goto error_sysctls; |
1035 | } | |
1036 | ||
17926a79 DH |
1037 | return 0; |
1038 | ||
5873c083 DH |
1039 | error_sysctls: |
1040 | unregister_key_type(&key_type_rxrpc_s); | |
17926a79 DH |
1041 | error_key_type_s: |
1042 | unregister_key_type(&key_type_rxrpc); | |
1043 | error_key_type: | |
1044 | sock_unregister(PF_RXRPC); | |
1045 | error_sock: | |
1046 | proto_unregister(&rxrpc_proto); | |
1047 | error_proto: | |
5399d522 | 1048 | unregister_pernet_device(&rxrpc_net_ops); |
2baec2c3 | 1049 | error_pernet: |
648af7fc | 1050 | rxrpc_exit_security(); |
8addc044 WY |
1051 | error_security: |
1052 | destroy_workqueue(rxrpc_workqueue); | |
651350d1 | 1053 | error_work_queue: |
17926a79 DH |
1054 | kmem_cache_destroy(rxrpc_call_jar); |
1055 | error_call_jar: | |
1056 | return ret; | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * unregister the RxRPC protocol | |
1061 | */ | |
1062 | static void __exit af_rxrpc_exit(void) | |
1063 | { | |
1064 | _enter(""); | |
5873c083 | 1065 | rxrpc_sysctl_exit(); |
17926a79 DH |
1066 | unregister_key_type(&key_type_rxrpc_s); |
1067 | unregister_key_type(&key_type_rxrpc); | |
1068 | sock_unregister(PF_RXRPC); | |
1069 | proto_unregister(&rxrpc_proto); | |
5399d522 | 1070 | unregister_pernet_device(&rxrpc_net_ops); |
71f3ca40 | 1071 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); |
4f95dd78 | 1072 | |
2baec2c3 DH |
1073 | /* Make sure the local and peer records pinned by any dying connections |
1074 | * are released. | |
1075 | */ | |
1076 | rcu_barrier(); | |
2baec2c3 | 1077 | |
651350d1 | 1078 | destroy_workqueue(rxrpc_workqueue); |
648af7fc | 1079 | rxrpc_exit_security(); |
17926a79 DH |
1080 | kmem_cache_destroy(rxrpc_call_jar); |
1081 | _leave(""); | |
1082 | } | |
1083 | ||
1084 | module_init(af_rxrpc_init); | |
1085 | module_exit(af_rxrpc_exit); |