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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 */ | |
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); |
2341e077 DH |
196 | rxrpc_put_local(local); |
197 | ret = -EADDRINUSE; | |
17926a79 DH |
198 | error_unlock: |
199 | release_sock(&rx->sk); | |
200 | error: | |
201 | _leave(" = %d", ret); | |
202 | return ret; | |
203 | } | |
204 | ||
205 | /* | |
206 | * set the number of pending calls permitted on a listening socket | |
207 | */ | |
208 | static int rxrpc_listen(struct socket *sock, int backlog) | |
209 | { | |
210 | struct sock *sk = sock->sk; | |
211 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
00e90712 | 212 | unsigned int max, old; |
17926a79 DH |
213 | int ret; |
214 | ||
215 | _enter("%p,%d", rx, backlog); | |
216 | ||
217 | lock_sock(&rx->sk); | |
218 | ||
219 | switch (rx->sk.sk_state) { | |
2341e077 | 220 | case RXRPC_UNBOUND: |
17926a79 DH |
221 | ret = -EADDRNOTAVAIL; |
222 | break; | |
17926a79 | 223 | case RXRPC_SERVER_BOUND: |
28036f44 | 224 | case RXRPC_SERVER_BOUND2: |
17926a79 | 225 | ASSERT(rx->local != NULL); |
0e119b41 DH |
226 | max = READ_ONCE(rxrpc_max_backlog); |
227 | ret = -EINVAL; | |
228 | if (backlog == INT_MAX) | |
229 | backlog = max; | |
230 | else if (backlog < 0 || backlog > max) | |
231 | break; | |
00e90712 | 232 | old = sk->sk_max_ack_backlog; |
17926a79 | 233 | sk->sk_max_ack_backlog = backlog; |
00e90712 DH |
234 | ret = rxrpc_service_prealloc(rx, GFP_KERNEL); |
235 | if (ret == 0) | |
236 | rx->sk.sk_state = RXRPC_SERVER_LISTENING; | |
237 | else | |
238 | sk->sk_max_ack_backlog = old; | |
17926a79 | 239 | break; |
210f0353 DH |
240 | case RXRPC_SERVER_LISTENING: |
241 | if (backlog == 0) { | |
242 | rx->sk.sk_state = RXRPC_SERVER_LISTEN_DISABLED; | |
243 | sk->sk_max_ack_backlog = 0; | |
244 | rxrpc_discard_prealloc(rx); | |
245 | ret = 0; | |
246 | break; | |
247 | } | |
e3cf3970 | 248 | /* Fall through */ |
0e119b41 DH |
249 | default: |
250 | ret = -EBUSY; | |
251 | break; | |
17926a79 DH |
252 | } |
253 | ||
254 | release_sock(&rx->sk); | |
255 | _leave(" = %d", ret); | |
256 | return ret; | |
257 | } | |
258 | ||
651350d1 DH |
259 | /** |
260 | * rxrpc_kernel_begin_call - Allow a kernel service to begin a call | |
261 | * @sock: The socket on which to make the call | |
2341e077 | 262 | * @srx: The address of the peer to contact |
651350d1 DH |
263 | * @key: The security context to use (defaults to socket setting) |
264 | * @user_call_ID: The ID to use | |
e754eba6 | 265 | * @tx_total_len: Total length of data to transmit during the call (or -1) |
d001648e DH |
266 | * @gfp: The allocation constraints |
267 | * @notify_rx: Where to send notifications instead of socket queue | |
a68f4a27 | 268 | * @upgrade: Request service upgrade for call |
b960a34b | 269 | * @intr: The call is interruptible |
a25e21f0 | 270 | * @debug_id: The debug ID for tracing to be assigned to the call |
651350d1 DH |
271 | * |
272 | * Allow a kernel service to begin a call on the nominated socket. This just | |
273 | * sets up all the internal tracking structures and allocates connection and | |
274 | * call IDs as appropriate. The call to be used is returned. | |
275 | * | |
276 | * The default socket destination address and security may be overridden by | |
277 | * supplying @srx and @key. | |
278 | */ | |
279 | struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, | |
280 | struct sockaddr_rxrpc *srx, | |
281 | struct key *key, | |
282 | unsigned long user_call_ID, | |
e754eba6 | 283 | s64 tx_total_len, |
d001648e | 284 | gfp_t gfp, |
a68f4a27 | 285 | rxrpc_notify_rx_t notify_rx, |
a25e21f0 | 286 | bool upgrade, |
b960a34b | 287 | bool intr, |
a25e21f0 | 288 | unsigned int debug_id) |
651350d1 | 289 | { |
19ffa01c | 290 | struct rxrpc_conn_parameters cp; |
48124178 | 291 | struct rxrpc_call_params p; |
651350d1 DH |
292 | struct rxrpc_call *call; |
293 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
f4552c2d | 294 | int ret; |
651350d1 DH |
295 | |
296 | _enter(",,%x,%lx", key_serial(key), user_call_ID); | |
297 | ||
f4552c2d DH |
298 | ret = rxrpc_validate_address(rx, srx, sizeof(*srx)); |
299 | if (ret < 0) | |
300 | return ERR_PTR(ret); | |
301 | ||
651350d1 DH |
302 | lock_sock(&rx->sk); |
303 | ||
19ffa01c DH |
304 | if (!key) |
305 | key = rx->key; | |
306 | if (key && !key->payload.data[0]) | |
307 | key = NULL; /* a no-security key */ | |
308 | ||
48124178 DH |
309 | memset(&p, 0, sizeof(p)); |
310 | p.user_call_ID = user_call_ID; | |
311 | p.tx_total_len = tx_total_len; | |
b960a34b | 312 | p.intr = intr; |
48124178 | 313 | |
19ffa01c DH |
314 | memset(&cp, 0, sizeof(cp)); |
315 | cp.local = rx->local; | |
316 | cp.key = key; | |
93864fc3 | 317 | cp.security_level = rx->min_sec_level; |
19ffa01c | 318 | cp.exclusive = false; |
a68f4a27 | 319 | cp.upgrade = upgrade; |
19ffa01c | 320 | cp.service_id = srx->srx_service; |
a25e21f0 | 321 | call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id); |
540b1c48 | 322 | /* The socket has been unlocked. */ |
6cb3ece9 | 323 | if (!IS_ERR(call)) { |
d001648e | 324 | call->notify_rx = notify_rx; |
6cb3ece9 DH |
325 | mutex_unlock(&call->user_mutex); |
326 | } | |
19ffa01c | 327 | |
17226f12 | 328 | rxrpc_put_peer(cp.peer); |
651350d1 DH |
329 | _leave(" = %p", call); |
330 | return call; | |
331 | } | |
651350d1 DH |
332 | EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
333 | ||
20acbd9a DH |
334 | /* |
335 | * Dummy function used to stop the notifier talking to recvmsg(). | |
336 | */ | |
337 | static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall, | |
338 | unsigned long call_user_ID) | |
339 | { | |
340 | } | |
341 | ||
651350d1 DH |
342 | /** |
343 | * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using | |
4de48af6 | 344 | * @sock: The socket the call is on |
651350d1 DH |
345 | * @call: The call to end |
346 | * | |
347 | * Allow a kernel service to end a call it was using. The call must be | |
348 | * complete before this is called (the call should be aborted if necessary). | |
349 | */ | |
4de48af6 | 350 | void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call) |
651350d1 DH |
351 | { |
352 | _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); | |
540b1c48 DH |
353 | |
354 | mutex_lock(&call->user_mutex); | |
8d94aa38 | 355 | rxrpc_release_call(rxrpc_sk(sock->sk), call); |
20acbd9a DH |
356 | |
357 | /* Make sure we're not going to call back into a kernel service */ | |
358 | if (call->notify_rx) { | |
359 | spin_lock_bh(&call->notify_lock); | |
360 | call->notify_rx = rxrpc_dummy_notify_rx; | |
361 | spin_unlock_bh(&call->notify_lock); | |
362 | } | |
363 | ||
540b1c48 | 364 | mutex_unlock(&call->user_mutex); |
cbd00891 | 365 | rxrpc_put_call(call, rxrpc_call_put_kernel); |
651350d1 | 366 | } |
651350d1 DH |
367 | EXPORT_SYMBOL(rxrpc_kernel_end_call); |
368 | ||
f4d15fb6 DH |
369 | /** |
370 | * rxrpc_kernel_check_life - Check to see whether a call is still alive | |
371 | * @sock: The socket the call is on | |
372 | * @call: The call to check | |
4611da30 | 373 | * @_life: Where to store the life value |
f4d15fb6 DH |
374 | * |
375 | * Allow a kernel service to find out whether a call is still alive - ie. we're | |
4611da30 MD |
376 | * getting ACKs from the server. Passes back in *_life a number representing |
377 | * the life state which can be compared to that returned by a previous call and | |
378 | * return true if the call is still alive. | |
f4d15fb6 | 379 | * |
7150ceaa DH |
380 | * If the life state stalls, rxrpc_kernel_probe_life() should be called and |
381 | * then 2RTT waited. | |
f4d15fb6 | 382 | */ |
4611da30 MD |
383 | bool rxrpc_kernel_check_life(const struct socket *sock, |
384 | const struct rxrpc_call *call, | |
385 | u32 *_life) | |
f4d15fb6 | 386 | { |
4611da30 MD |
387 | *_life = call->acks_latest; |
388 | return call->state != RXRPC_CALL_COMPLETE; | |
f4d15fb6 DH |
389 | } |
390 | EXPORT_SYMBOL(rxrpc_kernel_check_life); | |
391 | ||
7150ceaa DH |
392 | /** |
393 | * rxrpc_kernel_probe_life - Poke the peer to see if it's still alive | |
394 | * @sock: The socket the call is on | |
395 | * @call: The call to check | |
396 | * | |
397 | * In conjunction with rxrpc_kernel_check_life(), allow a kernel service to | |
398 | * find out whether a call is still alive by pinging it. This should cause the | |
399 | * life state to be bumped in about 2*RTT. | |
400 | * | |
401 | * The must be called in TASK_RUNNING state on pain of might_sleep() objecting. | |
402 | */ | |
403 | void rxrpc_kernel_probe_life(struct socket *sock, struct rxrpc_call *call) | |
404 | { | |
405 | rxrpc_propose_ACK(call, RXRPC_ACK_PING, 0, 0, true, false, | |
406 | rxrpc_propose_ack_ping_for_check_life); | |
407 | rxrpc_send_ack_packet(call, true, NULL); | |
408 | } | |
409 | EXPORT_SYMBOL(rxrpc_kernel_probe_life); | |
410 | ||
e908bcf4 DH |
411 | /** |
412 | * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call. | |
413 | * @sock: The socket the call is on | |
414 | * @call: The call to query | |
415 | * | |
416 | * Allow a kernel service to retrieve the epoch value from a service call to | |
417 | * see if the client at the other end rebooted. | |
418 | */ | |
419 | u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call) | |
420 | { | |
421 | return call->conn->proto.epoch; | |
422 | } | |
423 | EXPORT_SYMBOL(rxrpc_kernel_get_epoch); | |
424 | ||
651350d1 | 425 | /** |
d001648e | 426 | * rxrpc_kernel_new_call_notification - Get notifications of new calls |
651350d1 | 427 | * @sock: The socket to intercept received messages on |
d001648e | 428 | * @notify_new_call: Function to be called when new calls appear |
00e90712 | 429 | * @discard_new_call: Function to discard preallocated calls |
651350d1 | 430 | * |
d001648e | 431 | * Allow a kernel service to be given notifications about new calls. |
651350d1 | 432 | */ |
d001648e DH |
433 | void rxrpc_kernel_new_call_notification( |
434 | struct socket *sock, | |
00e90712 DH |
435 | rxrpc_notify_new_call_t notify_new_call, |
436 | rxrpc_discard_new_call_t discard_new_call) | |
651350d1 DH |
437 | { |
438 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
439 | ||
d001648e | 440 | rx->notify_new_call = notify_new_call; |
00e90712 | 441 | rx->discard_new_call = discard_new_call; |
651350d1 | 442 | } |
d001648e | 443 | EXPORT_SYMBOL(rxrpc_kernel_new_call_notification); |
651350d1 | 444 | |
bbd172e3 DH |
445 | /** |
446 | * rxrpc_kernel_set_max_life - Set maximum lifespan on a call | |
447 | * @sock: The socket the call is on | |
448 | * @call: The call to configure | |
449 | * @hard_timeout: The maximum lifespan of the call in jiffies | |
450 | * | |
451 | * Set the maximum lifespan of a call. The call will end with ETIME or | |
452 | * ETIMEDOUT if it takes longer than this. | |
453 | */ | |
454 | void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call, | |
455 | unsigned long hard_timeout) | |
456 | { | |
457 | unsigned long now; | |
458 | ||
459 | mutex_lock(&call->user_mutex); | |
460 | ||
461 | now = jiffies; | |
462 | hard_timeout += now; | |
463 | WRITE_ONCE(call->expect_term_by, hard_timeout); | |
464 | rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard); | |
465 | ||
466 | mutex_unlock(&call->user_mutex); | |
467 | } | |
468 | EXPORT_SYMBOL(rxrpc_kernel_set_max_life); | |
469 | ||
17926a79 DH |
470 | /* |
471 | * connect an RxRPC socket | |
472 | * - this just targets it at a specific destination; no actual connection | |
473 | * negotiation takes place | |
474 | */ | |
475 | static int rxrpc_connect(struct socket *sock, struct sockaddr *addr, | |
476 | int addr_len, int flags) | |
477 | { | |
2341e077 DH |
478 | struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr; |
479 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
17926a79 DH |
480 | int ret; |
481 | ||
482 | _enter("%p,%p,%d,%d", rx, addr, addr_len, flags); | |
483 | ||
484 | ret = rxrpc_validate_address(rx, srx, addr_len); | |
485 | if (ret < 0) { | |
486 | _leave(" = %d [bad addr]", ret); | |
487 | return ret; | |
488 | } | |
489 | ||
490 | lock_sock(&rx->sk); | |
491 | ||
2341e077 DH |
492 | ret = -EISCONN; |
493 | if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) | |
494 | goto error; | |
495 | ||
17926a79 | 496 | switch (rx->sk.sk_state) { |
2341e077 DH |
497 | case RXRPC_UNBOUND: |
498 | rx->sk.sk_state = RXRPC_CLIENT_UNBOUND; | |
499 | case RXRPC_CLIENT_UNBOUND: | |
17926a79 DH |
500 | case RXRPC_CLIENT_BOUND: |
501 | break; | |
17926a79 | 502 | default: |
2341e077 DH |
503 | ret = -EBUSY; |
504 | goto error; | |
17926a79 DH |
505 | } |
506 | ||
2341e077 DH |
507 | rx->connect_srx = *srx; |
508 | set_bit(RXRPC_SOCK_CONNECTED, &rx->flags); | |
509 | ret = 0; | |
17926a79 | 510 | |
2341e077 | 511 | error: |
17926a79 | 512 | release_sock(&rx->sk); |
2341e077 | 513 | return ret; |
17926a79 DH |
514 | } |
515 | ||
516 | /* | |
517 | * send a message through an RxRPC socket | |
518 | * - in a client this does a number of things: | |
519 | * - finds/sets up a connection for the security specified (if any) | |
520 | * - initiates a call (ID in control data) | |
521 | * - ends the request phase of a call (if MSG_MORE is not set) | |
522 | * - sends a call data packet | |
523 | * - may send an abort (abort code in control data) | |
524 | */ | |
1b784140 | 525 | static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len) |
17926a79 | 526 | { |
2341e077 | 527 | struct rxrpc_local *local; |
17926a79 DH |
528 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
529 | int ret; | |
530 | ||
531 | _enter(",{%d},,%zu", rx->sk.sk_state, len); | |
532 | ||
533 | if (m->msg_flags & MSG_OOB) | |
534 | return -EOPNOTSUPP; | |
535 | ||
536 | if (m->msg_name) { | |
537 | ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen); | |
538 | if (ret < 0) { | |
539 | _leave(" = %d [bad addr]", ret); | |
540 | return ret; | |
541 | } | |
542 | } | |
543 | ||
17926a79 DH |
544 | lock_sock(&rx->sk); |
545 | ||
17926a79 | 546 | switch (rx->sk.sk_state) { |
2341e077 | 547 | case RXRPC_UNBOUND: |
e835ada0 | 548 | case RXRPC_CLIENT_UNBOUND: |
cd5892c7 DH |
549 | rx->srx.srx_family = AF_RXRPC; |
550 | rx->srx.srx_service = 0; | |
551 | rx->srx.transport_type = SOCK_DGRAM; | |
552 | rx->srx.transport.family = rx->family; | |
553 | switch (rx->family) { | |
554 | case AF_INET: | |
555 | rx->srx.transport_len = sizeof(struct sockaddr_in); | |
556 | break; | |
d1912747 | 557 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
558 | case AF_INET6: |
559 | rx->srx.transport_len = sizeof(struct sockaddr_in6); | |
560 | break; | |
d1912747 | 561 | #endif |
cd5892c7 DH |
562 | default: |
563 | ret = -EAFNOSUPPORT; | |
564 | goto error_unlock; | |
565 | } | |
2baec2c3 | 566 | local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx); |
2341e077 DH |
567 | if (IS_ERR(local)) { |
568 | ret = PTR_ERR(local); | |
569 | goto error_unlock; | |
17926a79 | 570 | } |
2341e077 DH |
571 | |
572 | rx->local = local; | |
e835ada0 | 573 | rx->sk.sk_state = RXRPC_CLIENT_BOUND; |
2341e077 DH |
574 | /* Fall through */ |
575 | ||
17926a79 | 576 | case RXRPC_CLIENT_BOUND: |
2341e077 DH |
577 | if (!m->msg_name && |
578 | test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) { | |
579 | m->msg_name = &rx->connect_srx; | |
580 | m->msg_namelen = sizeof(rx->connect_srx); | |
17926a79 | 581 | } |
e3cf3970 | 582 | /* Fall through */ |
2341e077 DH |
583 | case RXRPC_SERVER_BOUND: |
584 | case RXRPC_SERVER_LISTENING: | |
585 | ret = rxrpc_do_sendmsg(rx, m, len); | |
540b1c48 DH |
586 | /* The socket has been unlocked */ |
587 | goto out; | |
17926a79 | 588 | default: |
2341e077 | 589 | ret = -EINVAL; |
540b1c48 | 590 | goto error_unlock; |
17926a79 DH |
591 | } |
592 | ||
2341e077 | 593 | error_unlock: |
17926a79 | 594 | release_sock(&rx->sk); |
540b1c48 | 595 | out: |
17926a79 DH |
596 | _leave(" = %d", ret); |
597 | return ret; | |
598 | } | |
599 | ||
600 | /* | |
601 | * set RxRPC socket options | |
602 | */ | |
603 | static int rxrpc_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 604 | char __user *optval, unsigned int optlen) |
17926a79 DH |
605 | { |
606 | struct rxrpc_sock *rx = rxrpc_sk(sock->sk); | |
95c96174 | 607 | unsigned int min_sec_level; |
4722974d | 608 | u16 service_upgrade[2]; |
17926a79 DH |
609 | int ret; |
610 | ||
611 | _enter(",%d,%d,,%d", level, optname, optlen); | |
612 | ||
613 | lock_sock(&rx->sk); | |
614 | ret = -EOPNOTSUPP; | |
615 | ||
616 | if (level == SOL_RXRPC) { | |
617 | switch (optname) { | |
618 | case RXRPC_EXCLUSIVE_CONNECTION: | |
619 | ret = -EINVAL; | |
620 | if (optlen != 0) | |
621 | goto error; | |
622 | ret = -EISCONN; | |
2341e077 | 623 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 | 624 | goto error; |
cc8feb8e | 625 | rx->exclusive = true; |
17926a79 DH |
626 | goto success; |
627 | ||
628 | case RXRPC_SECURITY_KEY: | |
629 | ret = -EINVAL; | |
630 | if (rx->key) | |
631 | goto error; | |
632 | ret = -EISCONN; | |
2341e077 | 633 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
634 | goto error; |
635 | ret = rxrpc_request_key(rx, optval, optlen); | |
636 | goto error; | |
637 | ||
638 | case RXRPC_SECURITY_KEYRING: | |
639 | ret = -EINVAL; | |
640 | if (rx->key) | |
641 | goto error; | |
642 | ret = -EISCONN; | |
2341e077 | 643 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
644 | goto error; |
645 | ret = rxrpc_server_keyring(rx, optval, optlen); | |
646 | goto error; | |
647 | ||
648 | case RXRPC_MIN_SECURITY_LEVEL: | |
649 | ret = -EINVAL; | |
95c96174 | 650 | if (optlen != sizeof(unsigned int)) |
17926a79 DH |
651 | goto error; |
652 | ret = -EISCONN; | |
2341e077 | 653 | if (rx->sk.sk_state != RXRPC_UNBOUND) |
17926a79 DH |
654 | goto error; |
655 | ret = get_user(min_sec_level, | |
95c96174 | 656 | (unsigned int __user *) optval); |
17926a79 DH |
657 | if (ret < 0) |
658 | goto error; | |
659 | ret = -EINVAL; | |
660 | if (min_sec_level > RXRPC_SECURITY_MAX) | |
661 | goto error; | |
662 | rx->min_sec_level = min_sec_level; | |
663 | goto success; | |
664 | ||
4722974d DH |
665 | case RXRPC_UPGRADEABLE_SERVICE: |
666 | ret = -EINVAL; | |
667 | if (optlen != sizeof(service_upgrade) || | |
668 | rx->service_upgrade.from != 0) | |
669 | goto error; | |
670 | ret = -EISCONN; | |
671 | if (rx->sk.sk_state != RXRPC_SERVER_BOUND2) | |
672 | goto error; | |
673 | ret = -EFAULT; | |
674 | if (copy_from_user(service_upgrade, optval, | |
675 | sizeof(service_upgrade)) != 0) | |
676 | goto error; | |
677 | ret = -EINVAL; | |
678 | if ((service_upgrade[0] != rx->srx.srx_service || | |
679 | service_upgrade[1] != rx->second_service) && | |
680 | (service_upgrade[0] != rx->second_service || | |
681 | service_upgrade[1] != rx->srx.srx_service)) | |
682 | goto error; | |
683 | rx->service_upgrade.from = service_upgrade[0]; | |
684 | rx->service_upgrade.to = service_upgrade[1]; | |
685 | goto success; | |
686 | ||
17926a79 DH |
687 | default: |
688 | break; | |
689 | } | |
690 | } | |
691 | ||
692 | success: | |
693 | ret = 0; | |
694 | error: | |
695 | release_sock(&rx->sk); | |
696 | return ret; | |
697 | } | |
698 | ||
515559ca DH |
699 | /* |
700 | * Get socket options. | |
701 | */ | |
702 | static int rxrpc_getsockopt(struct socket *sock, int level, int optname, | |
703 | char __user *optval, int __user *_optlen) | |
704 | { | |
705 | int optlen; | |
3ec0efde | 706 | |
515559ca DH |
707 | if (level != SOL_RXRPC) |
708 | return -EOPNOTSUPP; | |
709 | ||
710 | if (get_user(optlen, _optlen)) | |
711 | return -EFAULT; | |
3ec0efde | 712 | |
515559ca DH |
713 | switch (optname) { |
714 | case RXRPC_SUPPORTED_CMSG: | |
715 | if (optlen < sizeof(int)) | |
716 | return -ETOOSMALL; | |
717 | if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || | |
718 | put_user(sizeof(int), _optlen)) | |
719 | return -EFAULT; | |
720 | return 0; | |
3ec0efde | 721 | |
515559ca DH |
722 | default: |
723 | return -EOPNOTSUPP; | |
724 | } | |
725 | } | |
726 | ||
17926a79 DH |
727 | /* |
728 | * permit an RxRPC socket to be polled | |
729 | */ | |
a11e1d43 LT |
730 | static __poll_t rxrpc_poll(struct file *file, struct socket *sock, |
731 | poll_table *wait) | |
17926a79 | 732 | { |
17926a79 | 733 | struct sock *sk = sock->sk; |
248f219c | 734 | struct rxrpc_sock *rx = rxrpc_sk(sk); |
a11e1d43 LT |
735 | __poll_t mask; |
736 | ||
89ab066d | 737 | sock_poll_wait(file, sock, wait); |
a11e1d43 | 738 | mask = 0; |
17926a79 DH |
739 | |
740 | /* the socket is readable if there are any messages waiting on the Rx | |
741 | * queue */ | |
248f219c | 742 | if (!list_empty(&rx->recvmsg_q)) |
a9a08845 | 743 | mask |= EPOLLIN | EPOLLRDNORM; |
17926a79 DH |
744 | |
745 | /* the socket is writable if there is space to add new data to the | |
746 | * socket; there is no guarantee that any particular call in progress | |
747 | * on the socket may have space in the Tx ACK window */ | |
748 | if (rxrpc_writable(sk)) | |
a9a08845 | 749 | mask |= EPOLLOUT | EPOLLWRNORM; |
17926a79 DH |
750 | |
751 | return mask; | |
752 | } | |
753 | ||
754 | /* | |
755 | * create an RxRPC socket | |
756 | */ | |
3f378b68 EP |
757 | static int rxrpc_create(struct net *net, struct socket *sock, int protocol, |
758 | int kern) | |
17926a79 | 759 | { |
ace45bec | 760 | struct rxrpc_net *rxnet; |
17926a79 DH |
761 | struct rxrpc_sock *rx; |
762 | struct sock *sk; | |
763 | ||
764 | _enter("%p,%d", sock, protocol); | |
765 | ||
b4f1342f | 766 | /* we support transport protocol UDP/UDP6 only */ |
d1912747 DH |
767 | if (protocol != PF_INET && |
768 | IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6) | |
17926a79 DH |
769 | return -EPROTONOSUPPORT; |
770 | ||
771 | if (sock->type != SOCK_DGRAM) | |
772 | return -ESOCKTNOSUPPORT; | |
773 | ||
774 | sock->ops = &rxrpc_rpc_ops; | |
775 | sock->state = SS_UNCONNECTED; | |
776 | ||
11aa9c28 | 777 | sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern); |
17926a79 DH |
778 | if (!sk) |
779 | return -ENOMEM; | |
780 | ||
781 | sock_init_data(sock, sk); | |
8d94aa38 | 782 | sock_set_flag(sk, SOCK_RCU_FREE); |
2341e077 | 783 | sk->sk_state = RXRPC_UNBOUND; |
17926a79 | 784 | sk->sk_write_space = rxrpc_write_space; |
0e119b41 | 785 | sk->sk_max_ack_backlog = 0; |
17926a79 DH |
786 | sk->sk_destruct = rxrpc_sock_destructor; |
787 | ||
788 | rx = rxrpc_sk(sk); | |
19ffa01c | 789 | rx->family = protocol; |
17926a79 DH |
790 | rx->calls = RB_ROOT; |
791 | ||
248f219c DH |
792 | spin_lock_init(&rx->incoming_lock); |
793 | INIT_LIST_HEAD(&rx->sock_calls); | |
794 | INIT_LIST_HEAD(&rx->to_be_accepted); | |
795 | INIT_LIST_HEAD(&rx->recvmsg_q); | |
796 | rwlock_init(&rx->recvmsg_lock); | |
17926a79 DH |
797 | rwlock_init(&rx->call_lock); |
798 | memset(&rx->srx, 0, sizeof(rx->srx)); | |
799 | ||
ace45bec DH |
800 | rxnet = rxrpc_net(sock_net(&rx->sk)); |
801 | timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1); | |
802 | ||
17926a79 DH |
803 | _leave(" = 0 [%p]", rx); |
804 | return 0; | |
805 | } | |
806 | ||
248f219c DH |
807 | /* |
808 | * Kill all the calls on a socket and shut it down. | |
809 | */ | |
810 | static int rxrpc_shutdown(struct socket *sock, int flags) | |
811 | { | |
812 | struct sock *sk = sock->sk; | |
813 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
814 | int ret = 0; | |
815 | ||
816 | _enter("%p,%d", sk, flags); | |
817 | ||
818 | if (flags != SHUT_RDWR) | |
819 | return -EOPNOTSUPP; | |
820 | if (sk->sk_state == RXRPC_CLOSE) | |
821 | return -ESHUTDOWN; | |
822 | ||
823 | lock_sock(sk); | |
824 | ||
825 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
826 | if (sk->sk_state < RXRPC_CLOSE) { | |
827 | sk->sk_state = RXRPC_CLOSE; | |
828 | sk->sk_shutdown = SHUTDOWN_MASK; | |
829 | } else { | |
830 | ret = -ESHUTDOWN; | |
831 | } | |
832 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
833 | ||
834 | rxrpc_discard_prealloc(rx); | |
835 | ||
836 | release_sock(sk); | |
837 | return ret; | |
838 | } | |
839 | ||
17926a79 DH |
840 | /* |
841 | * RxRPC socket destructor | |
842 | */ | |
843 | static void rxrpc_sock_destructor(struct sock *sk) | |
844 | { | |
845 | _enter("%p", sk); | |
846 | ||
847 | rxrpc_purge_queue(&sk->sk_receive_queue); | |
848 | ||
14afee4b | 849 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
547b792c IJ |
850 | WARN_ON(!sk_unhashed(sk)); |
851 | WARN_ON(sk->sk_socket); | |
17926a79 DH |
852 | |
853 | if (!sock_flag(sk, SOCK_DEAD)) { | |
854 | printk("Attempt to release alive rxrpc socket: %p\n", sk); | |
855 | return; | |
856 | } | |
857 | } | |
858 | ||
859 | /* | |
860 | * release an RxRPC socket | |
861 | */ | |
862 | static int rxrpc_release_sock(struct sock *sk) | |
863 | { | |
864 | struct rxrpc_sock *rx = rxrpc_sk(sk); | |
c5012564 | 865 | struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk)); |
17926a79 | 866 | |
41c6d650 | 867 | _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt)); |
17926a79 DH |
868 | |
869 | /* declare the socket closed for business */ | |
870 | sock_orphan(sk); | |
871 | sk->sk_shutdown = SHUTDOWN_MASK; | |
872 | ||
f859ab61 DH |
873 | /* We want to kill off all connections from a service socket |
874 | * as fast as possible because we can't share these; client | |
875 | * sockets, on the other hand, can share an endpoint. | |
876 | */ | |
877 | switch (sk->sk_state) { | |
878 | case RXRPC_SERVER_BOUND: | |
879 | case RXRPC_SERVER_BOUND2: | |
880 | case RXRPC_SERVER_LISTENING: | |
881 | case RXRPC_SERVER_LISTEN_DISABLED: | |
882 | rx->local->service_closed = true; | |
883 | break; | |
884 | } | |
885 | ||
17926a79 DH |
886 | spin_lock_bh(&sk->sk_receive_queue.lock); |
887 | sk->sk_state = RXRPC_CLOSE; | |
888 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
889 | ||
b63452c1 | 890 | if (rx->local && rcu_access_pointer(rx->local->service) == rx) { |
248f219c | 891 | write_lock(&rx->local->services_lock); |
b63452c1 | 892 | rcu_assign_pointer(rx->local->service, NULL); |
248f219c | 893 | write_unlock(&rx->local->services_lock); |
17926a79 DH |
894 | } |
895 | ||
896 | /* try to flush out this socket */ | |
00e90712 | 897 | rxrpc_discard_prealloc(rx); |
17926a79 | 898 | rxrpc_release_calls_on_socket(rx); |
651350d1 | 899 | flush_workqueue(rxrpc_workqueue); |
17926a79 | 900 | rxrpc_purge_queue(&sk->sk_receive_queue); |
c5012564 DH |
901 | rxrpc_queue_work(&rxnet->service_conn_reaper); |
902 | rxrpc_queue_work(&rxnet->client_conn_reaper); | |
17926a79 | 903 | |
5627cc8b DH |
904 | rxrpc_put_local(rx->local); |
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 | 975 | int ret = -1; |
44430612 | 976 | unsigned int tmp; |
17926a79 | 977 | |
ce6654cf | 978 | BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb)); |
17926a79 | 979 | |
44430612 MW |
980 | get_random_bytes(&tmp, sizeof(tmp)); |
981 | tmp &= 0x3fffffff; | |
982 | if (tmp == 0) | |
983 | tmp = 1; | |
984 | idr_set_cursor(&rxrpc_client_conn_ids, tmp); | |
17926a79 | 985 | |
651350d1 | 986 | ret = -ENOMEM; |
17926a79 DH |
987 | rxrpc_call_jar = kmem_cache_create( |
988 | "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, | |
20c2df83 | 989 | SLAB_HWCACHE_ALIGN, NULL); |
17926a79 | 990 | if (!rxrpc_call_jar) { |
9b6d5398 | 991 | pr_notice("Failed to allocate call jar\n"); |
17926a79 DH |
992 | goto error_call_jar; |
993 | } | |
994 | ||
e1fcc7e2 | 995 | rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1); |
651350d1 | 996 | if (!rxrpc_workqueue) { |
9b6d5398 | 997 | pr_notice("Failed to allocate work queue\n"); |
651350d1 DH |
998 | goto error_work_queue; |
999 | } | |
1000 | ||
648af7fc DH |
1001 | ret = rxrpc_init_security(); |
1002 | if (ret < 0) { | |
9b6d5398 | 1003 | pr_crit("Cannot initialise security\n"); |
648af7fc DH |
1004 | goto error_security; |
1005 | } | |
1006 | ||
2baec2c3 DH |
1007 | ret = register_pernet_subsys(&rxrpc_net_ops); |
1008 | if (ret) | |
1009 | goto error_pernet; | |
1010 | ||
17926a79 | 1011 | ret = proto_register(&rxrpc_proto, 1); |
1c899641 | 1012 | if (ret < 0) { |
9b6d5398 | 1013 | pr_crit("Cannot register protocol\n"); |
17926a79 DH |
1014 | goto error_proto; |
1015 | } | |
1016 | ||
1017 | ret = sock_register(&rxrpc_family_ops); | |
1018 | if (ret < 0) { | |
9b6d5398 | 1019 | pr_crit("Cannot register socket family\n"); |
17926a79 DH |
1020 | goto error_sock; |
1021 | } | |
1022 | ||
1023 | ret = register_key_type(&key_type_rxrpc); | |
1024 | if (ret < 0) { | |
9b6d5398 | 1025 | pr_crit("Cannot register client key type\n"); |
17926a79 DH |
1026 | goto error_key_type; |
1027 | } | |
1028 | ||
1029 | ret = register_key_type(&key_type_rxrpc_s); | |
1030 | if (ret < 0) { | |
9b6d5398 | 1031 | pr_crit("Cannot register server key type\n"); |
17926a79 DH |
1032 | goto error_key_type_s; |
1033 | } | |
1034 | ||
5873c083 DH |
1035 | ret = rxrpc_sysctl_init(); |
1036 | if (ret < 0) { | |
9b6d5398 | 1037 | pr_crit("Cannot register sysctls\n"); |
5873c083 DH |
1038 | goto error_sysctls; |
1039 | } | |
1040 | ||
17926a79 DH |
1041 | return 0; |
1042 | ||
5873c083 DH |
1043 | error_sysctls: |
1044 | unregister_key_type(&key_type_rxrpc_s); | |
17926a79 DH |
1045 | error_key_type_s: |
1046 | unregister_key_type(&key_type_rxrpc); | |
1047 | error_key_type: | |
1048 | sock_unregister(PF_RXRPC); | |
1049 | error_sock: | |
1050 | proto_unregister(&rxrpc_proto); | |
1051 | error_proto: | |
2baec2c3 DH |
1052 | unregister_pernet_subsys(&rxrpc_net_ops); |
1053 | error_pernet: | |
648af7fc | 1054 | rxrpc_exit_security(); |
8addc044 WY |
1055 | error_security: |
1056 | destroy_workqueue(rxrpc_workqueue); | |
651350d1 | 1057 | error_work_queue: |
17926a79 DH |
1058 | kmem_cache_destroy(rxrpc_call_jar); |
1059 | error_call_jar: | |
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | /* | |
1064 | * unregister the RxRPC protocol | |
1065 | */ | |
1066 | static void __exit af_rxrpc_exit(void) | |
1067 | { | |
1068 | _enter(""); | |
5873c083 | 1069 | rxrpc_sysctl_exit(); |
17926a79 DH |
1070 | unregister_key_type(&key_type_rxrpc_s); |
1071 | unregister_key_type(&key_type_rxrpc); | |
1072 | sock_unregister(PF_RXRPC); | |
1073 | proto_unregister(&rxrpc_proto); | |
2baec2c3 | 1074 | unregister_pernet_subsys(&rxrpc_net_ops); |
71f3ca40 DH |
1075 | ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0); |
1076 | ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0); | |
4f95dd78 | 1077 | |
2baec2c3 DH |
1078 | /* Make sure the local and peer records pinned by any dying connections |
1079 | * are released. | |
1080 | */ | |
1081 | rcu_barrier(); | |
1082 | rxrpc_destroy_client_conn_ids(); | |
1083 | ||
651350d1 | 1084 | destroy_workqueue(rxrpc_workqueue); |
648af7fc | 1085 | rxrpc_exit_security(); |
17926a79 DH |
1086 | kmem_cache_destroy(rxrpc_call_jar); |
1087 | _leave(""); | |
1088 | } | |
1089 | ||
1090 | module_init(af_rxrpc_init); | |
1091 | module_exit(af_rxrpc_exit); |