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-rw-r--r--net/rxrpc/af_rxrpc.c879
1 files changed, 879 insertions, 0 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
new file mode 100644
index 000000000000..2c57df9c131b
--- /dev/null
+++ b/net/rxrpc/af_rxrpc.c
@@ -0,0 +1,879 @@
1/* AF_RXRPC implementation
2 *
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/module.h>
13#include <linux/net.h>
14#include <linux/skbuff.h>
15#include <linux/poll.h>
16#include <linux/proc_fs.h>
17#include <net/sock.h>
18#include <net/af_rxrpc.h>
19#include "ar-internal.h"
20
21MODULE_DESCRIPTION("RxRPC network protocol");
22MODULE_AUTHOR("Red Hat, Inc.");
23MODULE_LICENSE("GPL");
24MODULE_ALIAS_NETPROTO(PF_RXRPC);
25
26unsigned rxrpc_debug; // = RXRPC_DEBUG_KPROTO;
27module_param_named(debug, rxrpc_debug, uint, S_IWUSR | S_IRUGO);
28MODULE_PARM_DESC(rxrpc_debug, "RxRPC debugging mask");
29
30static int sysctl_rxrpc_max_qlen __read_mostly = 10;
31
32static struct proto rxrpc_proto;
33static const struct proto_ops rxrpc_rpc_ops;
34
35/* local epoch for detecting local-end reset */
36__be32 rxrpc_epoch;
37
38/* current debugging ID */
39atomic_t rxrpc_debug_id;
40
41/* count of skbs currently in use */
42atomic_t rxrpc_n_skbs;
43
44struct workqueue_struct *rxrpc_workqueue;
45
46static void rxrpc_sock_destructor(struct sock *);
47
48/*
49 * see if an RxRPC socket is currently writable
50 */
51static inline int rxrpc_writable(struct sock *sk)
52{
53 return atomic_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf;
54}
55
56/*
57 * wait for write bufferage to become available
58 */
59static void rxrpc_write_space(struct sock *sk)
60{
61 _enter("%p", sk);
62 read_lock(&sk->sk_callback_lock);
63 if (rxrpc_writable(sk)) {
64 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
65 wake_up_interruptible(sk->sk_sleep);
66 sk_wake_async(sk, 2, POLL_OUT);
67 }
68 read_unlock(&sk->sk_callback_lock);
69}
70
71/*
72 * validate an RxRPC address
73 */
74static int rxrpc_validate_address(struct rxrpc_sock *rx,
75 struct sockaddr_rxrpc *srx,
76 int len)
77{
78 if (len < sizeof(struct sockaddr_rxrpc))
79 return -EINVAL;
80
81 if (srx->srx_family != AF_RXRPC)
82 return -EAFNOSUPPORT;
83
84 if (srx->transport_type != SOCK_DGRAM)
85 return -ESOCKTNOSUPPORT;
86
87 len -= offsetof(struct sockaddr_rxrpc, transport);
88 if (srx->transport_len < sizeof(sa_family_t) ||
89 srx->transport_len > len)
90 return -EINVAL;
91
92 if (srx->transport.family != rx->proto)
93 return -EAFNOSUPPORT;
94
95 switch (srx->transport.family) {
96 case AF_INET:
97 _debug("INET: %x @ %u.%u.%u.%u",
98 ntohs(srx->transport.sin.sin_port),
99 NIPQUAD(srx->transport.sin.sin_addr));
100 if (srx->transport_len > 8)
101 memset((void *)&srx->transport + 8, 0,
102 srx->transport_len - 8);
103 break;
104
105 case AF_INET6:
106 default:
107 return -EAFNOSUPPORT;
108 }
109
110 return 0;
111}
112
113/*
114 * bind a local address to an RxRPC socket
115 */
116static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
117{
118 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *) saddr;
119 struct sock *sk = sock->sk;
120 struct rxrpc_local *local;
121 struct rxrpc_sock *rx = rxrpc_sk(sk), *prx;
122 __be16 service_id;
123 int ret;
124
125 _enter("%p,%p,%d", rx, saddr, len);
126
127 ret = rxrpc_validate_address(rx, srx, len);
128 if (ret < 0)
129 goto error;
130
131 lock_sock(&rx->sk);
132
133 if (rx->sk.sk_state != RXRPC_UNCONNECTED) {
134 ret = -EINVAL;
135 goto error_unlock;
136 }
137
138 memcpy(&rx->srx, srx, sizeof(rx->srx));
139
140 /* find a local transport endpoint if we don't have one already */
141 local = rxrpc_lookup_local(&rx->srx);
142 if (IS_ERR(local)) {
143 ret = PTR_ERR(local);
144 goto error_unlock;
145 }
146
147 rx->local = local;
148 if (srx->srx_service) {
149 service_id = htons(srx->srx_service);
150 write_lock_bh(&local->services_lock);
151 list_for_each_entry(prx, &local->services, listen_link) {
152 if (prx->service_id == service_id)
153 goto service_in_use;
154 }
155
156 rx->service_id = service_id;
157 list_add_tail(&rx->listen_link, &local->services);
158 write_unlock_bh(&local->services_lock);
159
160 rx->sk.sk_state = RXRPC_SERVER_BOUND;
161 } else {
162 rx->sk.sk_state = RXRPC_CLIENT_BOUND;
163 }
164
165 release_sock(&rx->sk);
166 _leave(" = 0");
167 return 0;
168
169service_in_use:
170 ret = -EADDRINUSE;
171 write_unlock_bh(&local->services_lock);
172error_unlock:
173 release_sock(&rx->sk);
174error:
175 _leave(" = %d", ret);
176 return ret;
177}
178
179/*
180 * set the number of pending calls permitted on a listening socket
181 */
182static int rxrpc_listen(struct socket *sock, int backlog)
183{
184 struct sock *sk = sock->sk;
185 struct rxrpc_sock *rx = rxrpc_sk(sk);
186 int ret;
187
188 _enter("%p,%d", rx, backlog);
189
190 lock_sock(&rx->sk);
191
192 switch (rx->sk.sk_state) {
193 case RXRPC_UNCONNECTED:
194 ret = -EADDRNOTAVAIL;
195 break;
196 case RXRPC_CLIENT_BOUND:
197 case RXRPC_CLIENT_CONNECTED:
198 default:
199 ret = -EBUSY;
200 break;
201 case RXRPC_SERVER_BOUND:
202 ASSERT(rx->local != NULL);
203 sk->sk_max_ack_backlog = backlog;
204 rx->sk.sk_state = RXRPC_SERVER_LISTENING;
205 ret = 0;
206 break;
207 }
208
209 release_sock(&rx->sk);
210 _leave(" = %d", ret);
211 return ret;
212}
213
214/*
215 * find a transport by address
216 */
217static struct rxrpc_transport *rxrpc_name_to_transport(struct socket *sock,
218 struct sockaddr *addr,
219 int addr_len, int flags,
220 gfp_t gfp)
221{
222 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *) addr;
223 struct rxrpc_transport *trans;
224 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
225 struct rxrpc_peer *peer;
226
227 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
228
229 ASSERT(rx->local != NULL);
230 ASSERT(rx->sk.sk_state > RXRPC_UNCONNECTED);
231
232 if (rx->srx.transport_type != srx->transport_type)
233 return ERR_PTR(-ESOCKTNOSUPPORT);
234 if (rx->srx.transport.family != srx->transport.family)
235 return ERR_PTR(-EAFNOSUPPORT);
236
237 /* find a remote transport endpoint from the local one */
238 peer = rxrpc_get_peer(srx, gfp);
239 if (IS_ERR(peer))
240 return ERR_PTR(PTR_ERR(peer));
241
242 /* find a transport */
243 trans = rxrpc_get_transport(rx->local, peer, gfp);
244 rxrpc_put_peer(peer);
245 _leave(" = %p", trans);
246 return trans;
247}
248
249/**
250 * rxrpc_kernel_begin_call - Allow a kernel service to begin a call
251 * @sock: The socket on which to make the call
252 * @srx: The address of the peer to contact (defaults to socket setting)
253 * @key: The security context to use (defaults to socket setting)
254 * @user_call_ID: The ID to use
255 *
256 * Allow a kernel service to begin a call on the nominated socket. This just
257 * sets up all the internal tracking structures and allocates connection and
258 * call IDs as appropriate. The call to be used is returned.
259 *
260 * The default socket destination address and security may be overridden by
261 * supplying @srx and @key.
262 */
263struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
264 struct sockaddr_rxrpc *srx,
265 struct key *key,
266 unsigned long user_call_ID,
267 gfp_t gfp)
268{
269 struct rxrpc_conn_bundle *bundle;
270 struct rxrpc_transport *trans;
271 struct rxrpc_call *call;
272 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
273 __be16 service_id;
274
275 _enter(",,%x,%lx", key_serial(key), user_call_ID);
276
277 lock_sock(&rx->sk);
278
279 if (srx) {
280 trans = rxrpc_name_to_transport(sock, (struct sockaddr *) srx,
281 sizeof(*srx), 0, gfp);
282 if (IS_ERR(trans)) {
283 call = ERR_PTR(PTR_ERR(trans));
284 trans = NULL;
285 goto out;
286 }
287 } else {
288 trans = rx->trans;
289 if (!trans) {
290 call = ERR_PTR(-ENOTCONN);
291 goto out;
292 }
293 atomic_inc(&trans->usage);
294 }
295
296 service_id = rx->service_id;
297 if (srx)
298 service_id = htons(srx->srx_service);
299
300 if (!key)
301 key = rx->key;
302 if (key && !key->payload.data)
303 key = NULL; /* a no-security key */
304
305 bundle = rxrpc_get_bundle(rx, trans, key, service_id, gfp);
306 if (IS_ERR(bundle)) {
307 call = ERR_PTR(PTR_ERR(bundle));
308 goto out;
309 }
310
311 call = rxrpc_get_client_call(rx, trans, bundle, user_call_ID, true,
312 gfp);
313 rxrpc_put_bundle(trans, bundle);
314out:
315 rxrpc_put_transport(trans);
316 release_sock(&rx->sk);
317 _leave(" = %p", call);
318 return call;
319}
320
321EXPORT_SYMBOL(rxrpc_kernel_begin_call);
322
323/**
324 * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
325 * @call: The call to end
326 *
327 * Allow a kernel service to end a call it was using. The call must be
328 * complete before this is called (the call should be aborted if necessary).
329 */
330void rxrpc_kernel_end_call(struct rxrpc_call *call)
331{
332 _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
333 rxrpc_remove_user_ID(call->socket, call);
334 rxrpc_put_call(call);
335}
336
337EXPORT_SYMBOL(rxrpc_kernel_end_call);
338
339/**
340 * rxrpc_kernel_intercept_rx_messages - Intercept received RxRPC messages
341 * @sock: The socket to intercept received messages on
342 * @interceptor: The function to pass the messages to
343 *
344 * Allow a kernel service to intercept messages heading for the Rx queue on an
345 * RxRPC socket. They get passed to the specified function instead.
346 * @interceptor should free the socket buffers it is given. @interceptor is
347 * called with the socket receive queue spinlock held and softirqs disabled -
348 * this ensures that the messages will be delivered in the right order.
349 */
350void rxrpc_kernel_intercept_rx_messages(struct socket *sock,
351 rxrpc_interceptor_t interceptor)
352{
353 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
354
355 _enter("");
356 rx->interceptor = interceptor;
357}
358
359EXPORT_SYMBOL(rxrpc_kernel_intercept_rx_messages);
360
361/*
362 * connect an RxRPC socket
363 * - this just targets it at a specific destination; no actual connection
364 * negotiation takes place
365 */
366static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
367 int addr_len, int flags)
368{
369 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *) addr;
370 struct sock *sk = sock->sk;
371 struct rxrpc_transport *trans;
372 struct rxrpc_local *local;
373 struct rxrpc_sock *rx = rxrpc_sk(sk);
374 int ret;
375
376 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
377
378 ret = rxrpc_validate_address(rx, srx, addr_len);
379 if (ret < 0) {
380 _leave(" = %d [bad addr]", ret);
381 return ret;
382 }
383
384 lock_sock(&rx->sk);
385
386 switch (rx->sk.sk_state) {
387 case RXRPC_UNCONNECTED:
388 /* find a local transport endpoint if we don't have one already */
389 ASSERTCMP(rx->local, ==, NULL);
390 rx->srx.srx_family = AF_RXRPC;
391 rx->srx.srx_service = 0;
392 rx->srx.transport_type = srx->transport_type;
393 rx->srx.transport_len = sizeof(sa_family_t);
394 rx->srx.transport.family = srx->transport.family;
395 local = rxrpc_lookup_local(&rx->srx);
396 if (IS_ERR(local)) {
397 release_sock(&rx->sk);
398 return PTR_ERR(local);
399 }
400 rx->local = local;
401 rx->sk.sk_state = RXRPC_CLIENT_BOUND;
402 case RXRPC_CLIENT_BOUND:
403 break;
404 case RXRPC_CLIENT_CONNECTED:
405 release_sock(&rx->sk);
406 return -EISCONN;
407 default:
408 release_sock(&rx->sk);
409 return -EBUSY; /* server sockets can't connect as well */
410 }
411
412 trans = rxrpc_name_to_transport(sock, addr, addr_len, flags,
413 GFP_KERNEL);
414 if (IS_ERR(trans)) {
415 release_sock(&rx->sk);
416 _leave(" = %ld", PTR_ERR(trans));
417 return PTR_ERR(trans);
418 }
419
420 rx->trans = trans;
421 rx->service_id = htons(srx->srx_service);
422 rx->sk.sk_state = RXRPC_CLIENT_CONNECTED;
423
424 release_sock(&rx->sk);
425 return 0;
426}
427
428/*
429 * send a message through an RxRPC socket
430 * - in a client this does a number of things:
431 * - finds/sets up a connection for the security specified (if any)
432 * - initiates a call (ID in control data)
433 * - ends the request phase of a call (if MSG_MORE is not set)
434 * - sends a call data packet
435 * - may send an abort (abort code in control data)
436 */
437static int rxrpc_sendmsg(struct kiocb *iocb, struct socket *sock,
438 struct msghdr *m, size_t len)
439{
440 struct rxrpc_transport *trans;
441 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
442 int ret;
443
444 _enter(",{%d},,%zu", rx->sk.sk_state, len);
445
446 if (m->msg_flags & MSG_OOB)
447 return -EOPNOTSUPP;
448
449 if (m->msg_name) {
450 ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
451 if (ret < 0) {
452 _leave(" = %d [bad addr]", ret);
453 return ret;
454 }
455 }
456
457 trans = NULL;
458 lock_sock(&rx->sk);
459
460 if (m->msg_name) {
461 ret = -EISCONN;
462 trans = rxrpc_name_to_transport(sock, m->msg_name,
463 m->msg_namelen, 0, GFP_KERNEL);
464 if (IS_ERR(trans)) {
465 ret = PTR_ERR(trans);
466 trans = NULL;
467 goto out;
468 }
469 } else {
470 trans = rx->trans;
471 if (trans)
472 atomic_inc(&trans->usage);
473 }
474
475 switch (rx->sk.sk_state) {
476 case RXRPC_SERVER_LISTENING:
477 if (!m->msg_name) {
478 ret = rxrpc_server_sendmsg(iocb, rx, m, len);
479 break;
480 }
481 case RXRPC_SERVER_BOUND:
482 case RXRPC_CLIENT_BOUND:
483 if (!m->msg_name) {
484 ret = -ENOTCONN;
485 break;
486 }
487 case RXRPC_CLIENT_CONNECTED:
488 ret = rxrpc_client_sendmsg(iocb, rx, trans, m, len);
489 break;
490 default:
491 ret = -ENOTCONN;
492 break;
493 }
494
495out:
496 release_sock(&rx->sk);
497 if (trans)
498 rxrpc_put_transport(trans);
499 _leave(" = %d", ret);
500 return ret;
501}
502
503/*
504 * set RxRPC socket options
505 */
506static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
507 char __user *optval, int optlen)
508{
509 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
510 unsigned min_sec_level;
511 int ret;
512
513 _enter(",%d,%d,,%d", level, optname, optlen);
514
515 lock_sock(&rx->sk);
516 ret = -EOPNOTSUPP;
517
518 if (level == SOL_RXRPC) {
519 switch (optname) {
520 case RXRPC_EXCLUSIVE_CONNECTION:
521 ret = -EINVAL;
522 if (optlen != 0)
523 goto error;
524 ret = -EISCONN;
525 if (rx->sk.sk_state != RXRPC_UNCONNECTED)
526 goto error;
527 set_bit(RXRPC_SOCK_EXCLUSIVE_CONN, &rx->flags);
528 goto success;
529
530 case RXRPC_SECURITY_KEY:
531 ret = -EINVAL;
532 if (rx->key)
533 goto error;
534 ret = -EISCONN;
535 if (rx->sk.sk_state != RXRPC_UNCONNECTED)
536 goto error;
537 ret = rxrpc_request_key(rx, optval, optlen);
538 goto error;
539
540 case RXRPC_SECURITY_KEYRING:
541 ret = -EINVAL;
542 if (rx->key)
543 goto error;
544 ret = -EISCONN;
545 if (rx->sk.sk_state != RXRPC_UNCONNECTED)
546 goto error;
547 ret = rxrpc_server_keyring(rx, optval, optlen);
548 goto error;
549
550 case RXRPC_MIN_SECURITY_LEVEL:
551 ret = -EINVAL;
552 if (optlen != sizeof(unsigned))
553 goto error;
554 ret = -EISCONN;
555 if (rx->sk.sk_state != RXRPC_UNCONNECTED)
556 goto error;
557 ret = get_user(min_sec_level,
558 (unsigned __user *) optval);
559 if (ret < 0)
560 goto error;
561 ret = -EINVAL;
562 if (min_sec_level > RXRPC_SECURITY_MAX)
563 goto error;
564 rx->min_sec_level = min_sec_level;
565 goto success;
566
567 default:
568 break;
569 }
570 }
571
572success:
573 ret = 0;
574error:
575 release_sock(&rx->sk);
576 return ret;
577}
578
579/*
580 * permit an RxRPC socket to be polled
581 */
582static unsigned int rxrpc_poll(struct file *file, struct socket *sock,
583 poll_table *wait)
584{
585 unsigned int mask;
586 struct sock *sk = sock->sk;
587
588 poll_wait(file, sk->sk_sleep, wait);
589 mask = 0;
590
591 /* the socket is readable if there are any messages waiting on the Rx
592 * queue */
593 if (!skb_queue_empty(&sk->sk_receive_queue))
594 mask |= POLLIN | POLLRDNORM;
595
596 /* the socket is writable if there is space to add new data to the
597 * socket; there is no guarantee that any particular call in progress
598 * on the socket may have space in the Tx ACK window */
599 if (rxrpc_writable(sk))
600 mask |= POLLOUT | POLLWRNORM;
601
602 return mask;
603}
604
605/*
606 * create an RxRPC socket
607 */
608static int rxrpc_create(struct socket *sock, int protocol)
609{
610 struct rxrpc_sock *rx;
611 struct sock *sk;
612
613 _enter("%p,%d", sock, protocol);
614
615 /* we support transport protocol UDP only */
616 if (protocol != PF_INET)
617 return -EPROTONOSUPPORT;
618
619 if (sock->type != SOCK_DGRAM)
620 return -ESOCKTNOSUPPORT;
621
622 sock->ops = &rxrpc_rpc_ops;
623 sock->state = SS_UNCONNECTED;
624
625 sk = sk_alloc(PF_RXRPC, GFP_KERNEL, &rxrpc_proto, 1);
626 if (!sk)
627 return -ENOMEM;
628
629 sock_init_data(sock, sk);
630 sk->sk_state = RXRPC_UNCONNECTED;
631 sk->sk_write_space = rxrpc_write_space;
632 sk->sk_max_ack_backlog = sysctl_rxrpc_max_qlen;
633 sk->sk_destruct = rxrpc_sock_destructor;
634
635 rx = rxrpc_sk(sk);
636 rx->proto = protocol;
637 rx->calls = RB_ROOT;
638
639 INIT_LIST_HEAD(&rx->listen_link);
640 INIT_LIST_HEAD(&rx->secureq);
641 INIT_LIST_HEAD(&rx->acceptq);
642 rwlock_init(&rx->call_lock);
643 memset(&rx->srx, 0, sizeof(rx->srx));
644
645 _leave(" = 0 [%p]", rx);
646 return 0;
647}
648
649/*
650 * RxRPC socket destructor
651 */
652static void rxrpc_sock_destructor(struct sock *sk)
653{
654 _enter("%p", sk);
655
656 rxrpc_purge_queue(&sk->sk_receive_queue);
657
658 BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
659 BUG_TRAP(sk_unhashed(sk));
660 BUG_TRAP(!sk->sk_socket);
661
662 if (!sock_flag(sk, SOCK_DEAD)) {
663 printk("Attempt to release alive rxrpc socket: %p\n", sk);
664 return;
665 }
666}
667
668/*
669 * release an RxRPC socket
670 */
671static int rxrpc_release_sock(struct sock *sk)
672{
673 struct rxrpc_sock *rx = rxrpc_sk(sk);
674
675 _enter("%p{%d,%d}", sk, sk->sk_state, atomic_read(&sk->sk_refcnt));
676
677 /* declare the socket closed for business */
678 sock_orphan(sk);
679 sk->sk_shutdown = SHUTDOWN_MASK;
680
681 spin_lock_bh(&sk->sk_receive_queue.lock);
682 sk->sk_state = RXRPC_CLOSE;
683 spin_unlock_bh(&sk->sk_receive_queue.lock);
684
685 ASSERTCMP(rx->listen_link.next, !=, LIST_POISON1);
686
687 if (!list_empty(&rx->listen_link)) {
688 write_lock_bh(&rx->local->services_lock);
689 list_del(&rx->listen_link);
690 write_unlock_bh(&rx->local->services_lock);
691 }
692
693 /* try to flush out this socket */
694 rxrpc_release_calls_on_socket(rx);
695 flush_workqueue(rxrpc_workqueue);
696 rxrpc_purge_queue(&sk->sk_receive_queue);
697
698 if (rx->conn) {
699 rxrpc_put_connection(rx->conn);
700 rx->conn = NULL;
701 }
702
703 if (rx->bundle) {
704 rxrpc_put_bundle(rx->trans, rx->bundle);
705 rx->bundle = NULL;
706 }
707 if (rx->trans) {
708 rxrpc_put_transport(rx->trans);
709 rx->trans = NULL;
710 }
711 if (rx->local) {
712 rxrpc_put_local(rx->local);
713 rx->local = NULL;
714 }
715
716 key_put(rx->key);
717 rx->key = NULL;
718 key_put(rx->securities);
719 rx->securities = NULL;
720 sock_put(sk);
721
722 _leave(" = 0");
723 return 0;
724}
725
726/*
727 * release an RxRPC BSD socket on close() or equivalent
728 */
729static int rxrpc_release(struct socket *sock)
730{
731 struct sock *sk = sock->sk;
732
733 _enter("%p{%p}", sock, sk);
734
735 if (!sk)
736 return 0;
737
738 sock->sk = NULL;
739
740 return rxrpc_release_sock(sk);
741}
742
743/*
744 * RxRPC network protocol
745 */
746static const struct proto_ops rxrpc_rpc_ops = {
747 .family = PF_UNIX,
748 .owner = THIS_MODULE,
749 .release = rxrpc_release,
750 .bind = rxrpc_bind,
751 .connect = rxrpc_connect,
752 .socketpair = sock_no_socketpair,
753 .accept = sock_no_accept,
754 .getname = sock_no_getname,
755 .poll = rxrpc_poll,
756 .ioctl = sock_no_ioctl,
757 .listen = rxrpc_listen,
758 .shutdown = sock_no_shutdown,
759 .setsockopt = rxrpc_setsockopt,
760 .getsockopt = sock_no_getsockopt,
761 .sendmsg = rxrpc_sendmsg,
762 .recvmsg = rxrpc_recvmsg,
763 .mmap = sock_no_mmap,
764 .sendpage = sock_no_sendpage,
765};
766
767static struct proto rxrpc_proto = {
768 .name = "RXRPC",
769 .owner = THIS_MODULE,
770 .obj_size = sizeof(struct rxrpc_sock),
771 .max_header = sizeof(struct rxrpc_header),
772};
773
774static struct net_proto_family rxrpc_family_ops = {
775 .family = PF_RXRPC,
776 .create = rxrpc_create,
777 .owner = THIS_MODULE,
778};
779
780/*
781 * initialise and register the RxRPC protocol
782 */
783static int __init af_rxrpc_init(void)
784{
785 struct sk_buff *dummy_skb;
786 int ret = -1;
787
788 BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof(dummy_skb->cb));
789
790 rxrpc_epoch = htonl(xtime.tv_sec);
791
792 ret = -ENOMEM;
793 rxrpc_call_jar = kmem_cache_create(
794 "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
795 SLAB_HWCACHE_ALIGN, NULL, NULL);
796 if (!rxrpc_call_jar) {
797 printk(KERN_NOTICE "RxRPC: Failed to allocate call jar\n");
798 goto error_call_jar;
799 }
800
801 rxrpc_workqueue = create_workqueue("krxrpcd");
802 if (!rxrpc_workqueue) {
803 printk(KERN_NOTICE "RxRPC: Failed to allocate work queue\n");
804 goto error_work_queue;
805 }
806
807 ret = proto_register(&rxrpc_proto, 1);
808 if (ret < 0) {
809 printk(KERN_CRIT "RxRPC: Cannot register protocol\n");
810 goto error_proto;
811 }
812
813 ret = sock_register(&rxrpc_family_ops);
814 if (ret < 0) {
815 printk(KERN_CRIT "RxRPC: Cannot register socket family\n");
816 goto error_sock;
817 }
818
819 ret = register_key_type(&key_type_rxrpc);
820 if (ret < 0) {
821 printk(KERN_CRIT "RxRPC: Cannot register client key type\n");
822 goto error_key_type;
823 }
824
825 ret = register_key_type(&key_type_rxrpc_s);
826 if (ret < 0) {
827 printk(KERN_CRIT "RxRPC: Cannot register server key type\n");
828 goto error_key_type_s;
829 }
830
831#ifdef CONFIG_PROC_FS
832 proc_net_fops_create("rxrpc_calls", 0, &rxrpc_call_seq_fops);
833 proc_net_fops_create("rxrpc_conns", 0, &rxrpc_connection_seq_fops);
834#endif
835 return 0;
836
837error_key_type_s:
838 unregister_key_type(&key_type_rxrpc);
839error_key_type:
840 sock_unregister(PF_RXRPC);
841error_sock:
842 proto_unregister(&rxrpc_proto);
843error_proto:
844 destroy_workqueue(rxrpc_workqueue);
845error_work_queue:
846 kmem_cache_destroy(rxrpc_call_jar);
847error_call_jar:
848 return ret;
849}
850
851/*
852 * unregister the RxRPC protocol
853 */
854static void __exit af_rxrpc_exit(void)
855{
856 _enter("");
857 unregister_key_type(&key_type_rxrpc_s);
858 unregister_key_type(&key_type_rxrpc);
859 sock_unregister(PF_RXRPC);
860 proto_unregister(&rxrpc_proto);
861 rxrpc_destroy_all_calls();
862 rxrpc_destroy_all_connections();
863 rxrpc_destroy_all_transports();
864 rxrpc_destroy_all_peers();
865 rxrpc_destroy_all_locals();
866
867 ASSERTCMP(atomic_read(&rxrpc_n_skbs), ==, 0);
868
869 _debug("flush scheduled work");
870 flush_workqueue(rxrpc_workqueue);
871 proc_net_remove("rxrpc_conns");
872 proc_net_remove("rxrpc_calls");
873 destroy_workqueue(rxrpc_workqueue);
874 kmem_cache_destroy(rxrpc_call_jar);
875 _leave("");
876}
877
878module_init(af_rxrpc_init);
879module_exit(af_rxrpc_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-08 16:00:51 -0500