1 /* AF_RXRPC implementation
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/net.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/random.h>
20 #include <linux/poll.h>
21 #include <linux/proc_fs.h>
22 #include <linux/key-type.h>
23 #include <net/net_namespace.h>
25 #include <net/af_rxrpc.h>
26 #define CREATE_TRACE_POINTS
27 #include "ar-internal.h"
29 MODULE_DESCRIPTION("RxRPC network protocol");
30 MODULE_AUTHOR("Red Hat, Inc.");
31 MODULE_LICENSE("GPL");
32 MODULE_ALIAS_NETPROTO(PF_RXRPC);
34 unsigned int rxrpc_debug; // = RXRPC_DEBUG_KPROTO;
35 module_param_named(debug, rxrpc_debug, uint, 0644);
36 MODULE_PARM_DESC(debug, "RxRPC debugging mask");
38 static struct proto rxrpc_proto;
39 static const struct proto_ops rxrpc_rpc_ops;
41 /* current debugging ID */
42 atomic_t rxrpc_debug_id;
43 EXPORT_SYMBOL(rxrpc_debug_id);
45 /* count of skbs currently in use */
46 atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
48 struct workqueue_struct *rxrpc_workqueue;
50 static void rxrpc_sock_destructor(struct sock *);
53 * see if an RxRPC socket is currently writable
55 static inline int rxrpc_writable(struct sock *sk)
57 return refcount_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf;
61 * wait for write bufferage to become available
63 static void rxrpc_write_space(struct sock *sk)
67 if (rxrpc_writable(sk)) {
68 struct socket_wq *wq = rcu_dereference(sk->sk_wq);
70 if (skwq_has_sleeper(wq))
71 wake_up_interruptible(&wq->wait);
72 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
78 * validate an RxRPC address
80 static int rxrpc_validate_address(struct rxrpc_sock *rx,
81 struct sockaddr_rxrpc *srx,
86 if (len < sizeof(struct sockaddr_rxrpc))
89 if (srx->srx_family != AF_RXRPC)
92 if (srx->transport_type != SOCK_DGRAM)
93 return -ESOCKTNOSUPPORT;
95 len -= offsetof(struct sockaddr_rxrpc, transport);
96 if (srx->transport_len < sizeof(sa_family_t) ||
97 srx->transport_len > len)
100 if (srx->transport.family != rx->family)
101 return -EAFNOSUPPORT;
103 switch (srx->transport.family) {
105 if (srx->transport_len < sizeof(struct sockaddr_in))
107 tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad);
110 #ifdef CONFIG_AF_RXRPC_IPV6
112 if (srx->transport_len < sizeof(struct sockaddr_in6))
114 tail = offsetof(struct sockaddr_rxrpc, transport) +
115 sizeof(struct sockaddr_in6);
120 return -EAFNOSUPPORT;
124 memset((void *)srx + tail, 0, len - tail);
125 _debug("INET: %pISp", &srx->transport);
130 * bind a local address to an RxRPC socket
132 static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
134 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;
135 struct rxrpc_local *local;
136 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
137 u16 service_id = srx->srx_service;
140 _enter("%p,%p,%d", rx, saddr, len);
142 ret = rxrpc_validate_address(rx, srx, len);
148 switch (rx->sk.sk_state) {
151 local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx);
153 ret = PTR_ERR(local);
158 write_lock(&local->services_lock);
159 if (rcu_access_pointer(local->service))
162 rcu_assign_pointer(local->service, rx);
163 write_unlock(&local->services_lock);
165 rx->sk.sk_state = RXRPC_SERVER_BOUND;
168 rx->sk.sk_state = RXRPC_CLIENT_BOUND;
172 case RXRPC_SERVER_BOUND:
177 if (service_id == rx->srx.srx_service)
180 srx->srx_service = rx->srx.srx_service;
181 if (memcmp(srx, &rx->srx, sizeof(*srx)) != 0)
183 rx->second_service = service_id;
184 rx->sk.sk_state = RXRPC_SERVER_BOUND2;
192 release_sock(&rx->sk);
197 write_unlock(&local->services_lock);
198 rxrpc_put_local(local);
201 release_sock(&rx->sk);
203 _leave(" = %d", ret);
208 * set the number of pending calls permitted on a listening socket
210 static int rxrpc_listen(struct socket *sock, int backlog)
212 struct sock *sk = sock->sk;
213 struct rxrpc_sock *rx = rxrpc_sk(sk);
214 unsigned int max, old;
217 _enter("%p,%d", rx, backlog);
221 switch (rx->sk.sk_state) {
223 ret = -EADDRNOTAVAIL;
225 case RXRPC_SERVER_BOUND:
226 case RXRPC_SERVER_BOUND2:
227 ASSERT(rx->local != NULL);
228 max = READ_ONCE(rxrpc_max_backlog);
230 if (backlog == INT_MAX)
232 else if (backlog < 0 || backlog > max)
234 old = sk->sk_max_ack_backlog;
235 sk->sk_max_ack_backlog = backlog;
236 ret = rxrpc_service_prealloc(rx, GFP_KERNEL);
238 rx->sk.sk_state = RXRPC_SERVER_LISTENING;
240 sk->sk_max_ack_backlog = old;
242 case RXRPC_SERVER_LISTENING:
244 rx->sk.sk_state = RXRPC_SERVER_LISTEN_DISABLED;
245 sk->sk_max_ack_backlog = 0;
246 rxrpc_discard_prealloc(rx);
256 release_sock(&rx->sk);
257 _leave(" = %d", ret);
262 * rxrpc_kernel_begin_call - Allow a kernel service to begin a call
263 * @sock: The socket on which to make the call
264 * @srx: The address of the peer to contact
265 * @key: The security context to use (defaults to socket setting)
266 * @user_call_ID: The ID to use
267 * @tx_total_len: Total length of data to transmit during the call (or -1)
268 * @gfp: The allocation constraints
269 * @notify_rx: Where to send notifications instead of socket queue
270 * @upgrade: Request service upgrade for call
271 * @debug_id: The debug ID for tracing to be assigned to the call
273 * Allow a kernel service to begin a call on the nominated socket. This just
274 * sets up all the internal tracking structures and allocates connection and
275 * call IDs as appropriate. The call to be used is returned.
277 * The default socket destination address and security may be overridden by
278 * supplying @srx and @key.
280 struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
281 struct sockaddr_rxrpc *srx,
283 unsigned long user_call_ID,
286 rxrpc_notify_rx_t notify_rx,
288 unsigned int debug_id)
290 struct rxrpc_conn_parameters cp;
291 struct rxrpc_call_params p;
292 struct rxrpc_call *call;
293 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
296 _enter(",,%x,%lx", key_serial(key), user_call_ID);
298 ret = rxrpc_validate_address(rx, srx, sizeof(*srx));
306 if (key && !key->payload.data[0])
307 key = NULL; /* a no-security key */
309 memset(&p, 0, sizeof(p));
310 p.user_call_ID = user_call_ID;
311 p.tx_total_len = tx_total_len;
313 memset(&cp, 0, sizeof(cp));
314 cp.local = rx->local;
316 cp.security_level = rx->min_sec_level;
317 cp.exclusive = false;
318 cp.upgrade = upgrade;
319 cp.service_id = srx->srx_service;
320 call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id);
321 /* The socket has been unlocked. */
323 call->notify_rx = notify_rx;
324 mutex_unlock(&call->user_mutex);
327 rxrpc_put_peer(cp.peer);
328 _leave(" = %p", call);
331 EXPORT_SYMBOL(rxrpc_kernel_begin_call);
334 * Dummy function used to stop the notifier talking to recvmsg().
336 static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall,
337 unsigned long call_user_ID)
342 * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
343 * @sock: The socket the call is on
344 * @call: The call to end
346 * Allow a kernel service to end a call it was using. The call must be
347 * complete before this is called (the call should be aborted if necessary).
349 void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call)
351 _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
353 mutex_lock(&call->user_mutex);
354 rxrpc_release_call(rxrpc_sk(sock->sk), call);
356 /* Make sure we're not going to call back into a kernel service */
357 if (call->notify_rx) {
358 spin_lock_bh(&call->notify_lock);
359 call->notify_rx = rxrpc_dummy_notify_rx;
360 spin_unlock_bh(&call->notify_lock);
363 mutex_unlock(&call->user_mutex);
364 rxrpc_put_call(call, rxrpc_call_put_kernel);
366 EXPORT_SYMBOL(rxrpc_kernel_end_call);
369 * rxrpc_kernel_check_life - Check to see whether a call is still alive
370 * @sock: The socket the call is on
371 * @call: The call to check
373 * Allow a kernel service to find out whether a call is still alive - ie. we're
374 * getting ACKs from the server. Returns a number representing the life state
375 * which can be compared to that returned by a previous call.
377 * If this is a client call, ping ACKs will be sent to the server to find out
378 * whether it's still responsive and whether the call is still alive on the
381 u32 rxrpc_kernel_check_life(struct socket *sock, struct rxrpc_call *call)
383 return call->acks_latest;
385 EXPORT_SYMBOL(rxrpc_kernel_check_life);
388 * rxrpc_kernel_check_call - Check a call's state
389 * @sock: The socket the call is on
390 * @call: The call to check
391 * @_compl: Where to store the completion state
392 * @_abort_code: Where to store any abort code
394 * Allow a kernel service to query the state of a call and find out the manner
395 * of its termination if it has completed. Returns -EINPROGRESS if the call is
396 * still going, 0 if the call finished successfully, -ECONNABORTED if the call
397 * was aborted and an appropriate error if the call failed in some other way.
399 int rxrpc_kernel_check_call(struct socket *sock, struct rxrpc_call *call,
400 enum rxrpc_call_completion *_compl, u32 *_abort_code)
402 if (call->state != RXRPC_CALL_COMPLETE)
405 *_compl = call->completion;
406 *_abort_code = call->abort_code;
409 EXPORT_SYMBOL(rxrpc_kernel_check_call);
412 * rxrpc_kernel_retry_call - Allow a kernel service to retry a call
413 * @sock: The socket the call is on
414 * @call: The call to retry
415 * @srx: The address of the peer to contact
416 * @key: The security context to use (defaults to socket setting)
418 * Allow a kernel service to try resending a client call that failed due to a
419 * network error to a new address. The Tx queue is maintained intact, thereby
420 * relieving the need to re-encrypt any request data that has already been
423 int rxrpc_kernel_retry_call(struct socket *sock, struct rxrpc_call *call,
424 struct sockaddr_rxrpc *srx, struct key *key)
426 struct rxrpc_conn_parameters cp;
427 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
430 _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
434 if (key && !key->payload.data[0])
435 key = NULL; /* a no-security key */
437 memset(&cp, 0, sizeof(cp));
438 cp.local = rx->local;
440 cp.security_level = 0;
441 cp.exclusive = false;
442 cp.service_id = srx->srx_service;
444 mutex_lock(&call->user_mutex);
446 ret = rxrpc_prepare_call_for_retry(rx, call);
448 ret = rxrpc_retry_client_call(rx, call, &cp, srx, GFP_KERNEL);
450 mutex_unlock(&call->user_mutex);
451 rxrpc_put_peer(cp.peer);
452 _leave(" = %d", ret);
455 EXPORT_SYMBOL(rxrpc_kernel_retry_call);
458 * rxrpc_kernel_new_call_notification - Get notifications of new calls
459 * @sock: The socket to intercept received messages on
460 * @notify_new_call: Function to be called when new calls appear
461 * @discard_new_call: Function to discard preallocated calls
463 * Allow a kernel service to be given notifications about new calls.
465 void rxrpc_kernel_new_call_notification(
467 rxrpc_notify_new_call_t notify_new_call,
468 rxrpc_discard_new_call_t discard_new_call)
470 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
472 rx->notify_new_call = notify_new_call;
473 rx->discard_new_call = discard_new_call;
475 EXPORT_SYMBOL(rxrpc_kernel_new_call_notification);
478 * connect an RxRPC socket
479 * - this just targets it at a specific destination; no actual connection
480 * negotiation takes place
482 static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
483 int addr_len, int flags)
485 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr;
486 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
489 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
491 ret = rxrpc_validate_address(rx, srx, addr_len);
493 _leave(" = %d [bad addr]", ret);
500 if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags))
503 switch (rx->sk.sk_state) {
505 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
506 case RXRPC_CLIENT_UNBOUND:
507 case RXRPC_CLIENT_BOUND:
514 rx->connect_srx = *srx;
515 set_bit(RXRPC_SOCK_CONNECTED, &rx->flags);
519 release_sock(&rx->sk);
524 * send a message through an RxRPC socket
525 * - in a client this does a number of things:
526 * - finds/sets up a connection for the security specified (if any)
527 * - initiates a call (ID in control data)
528 * - ends the request phase of a call (if MSG_MORE is not set)
529 * - sends a call data packet
530 * - may send an abort (abort code in control data)
532 static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
534 struct rxrpc_local *local;
535 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
538 _enter(",{%d},,%zu", rx->sk.sk_state, len);
540 if (m->msg_flags & MSG_OOB)
544 ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
546 _leave(" = %d [bad addr]", ret);
553 switch (rx->sk.sk_state) {
555 rx->srx.srx_family = AF_RXRPC;
556 rx->srx.srx_service = 0;
557 rx->srx.transport_type = SOCK_DGRAM;
558 rx->srx.transport.family = rx->family;
559 switch (rx->family) {
561 rx->srx.transport_len = sizeof(struct sockaddr_in);
563 #ifdef CONFIG_AF_RXRPC_IPV6
565 rx->srx.transport_len = sizeof(struct sockaddr_in6);
572 local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);
574 ret = PTR_ERR(local);
579 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
582 case RXRPC_CLIENT_UNBOUND:
583 case RXRPC_CLIENT_BOUND:
585 test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) {
586 m->msg_name = &rx->connect_srx;
587 m->msg_namelen = sizeof(rx->connect_srx);
590 case RXRPC_SERVER_BOUND:
591 case RXRPC_SERVER_LISTENING:
592 ret = rxrpc_do_sendmsg(rx, m, len);
593 /* The socket has been unlocked */
601 release_sock(&rx->sk);
603 _leave(" = %d", ret);
608 * set RxRPC socket options
610 static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
611 char __user *optval, unsigned int optlen)
613 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
614 unsigned int min_sec_level;
615 u16 service_upgrade[2];
618 _enter(",%d,%d,,%d", level, optname, optlen);
623 if (level == SOL_RXRPC) {
625 case RXRPC_EXCLUSIVE_CONNECTION:
630 if (rx->sk.sk_state != RXRPC_UNBOUND)
632 rx->exclusive = true;
635 case RXRPC_SECURITY_KEY:
640 if (rx->sk.sk_state != RXRPC_UNBOUND)
642 ret = rxrpc_request_key(rx, optval, optlen);
645 case RXRPC_SECURITY_KEYRING:
650 if (rx->sk.sk_state != RXRPC_UNBOUND)
652 ret = rxrpc_server_keyring(rx, optval, optlen);
655 case RXRPC_MIN_SECURITY_LEVEL:
657 if (optlen != sizeof(unsigned int))
660 if (rx->sk.sk_state != RXRPC_UNBOUND)
662 ret = get_user(min_sec_level,
663 (unsigned int __user *) optval);
667 if (min_sec_level > RXRPC_SECURITY_MAX)
669 rx->min_sec_level = min_sec_level;
672 case RXRPC_UPGRADEABLE_SERVICE:
674 if (optlen != sizeof(service_upgrade) ||
675 rx->service_upgrade.from != 0)
678 if (rx->sk.sk_state != RXRPC_SERVER_BOUND2)
681 if (copy_from_user(service_upgrade, optval,
682 sizeof(service_upgrade)) != 0)
685 if ((service_upgrade[0] != rx->srx.srx_service ||
686 service_upgrade[1] != rx->second_service) &&
687 (service_upgrade[0] != rx->second_service ||
688 service_upgrade[1] != rx->srx.srx_service))
690 rx->service_upgrade.from = service_upgrade[0];
691 rx->service_upgrade.to = service_upgrade[1];
702 release_sock(&rx->sk);
707 * Get socket options.
709 static int rxrpc_getsockopt(struct socket *sock, int level, int optname,
710 char __user *optval, int __user *_optlen)
714 if (level != SOL_RXRPC)
717 if (get_user(optlen, _optlen))
721 case RXRPC_SUPPORTED_CMSG:
722 if (optlen < sizeof(int))
724 if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) ||
725 put_user(sizeof(int), _optlen))
735 * permit an RxRPC socket to be polled
737 static __poll_t rxrpc_poll(struct file *file, struct socket *sock,
740 struct sock *sk = sock->sk;
741 struct rxrpc_sock *rx = rxrpc_sk(sk);
744 sock_poll_wait(file, sk_sleep(sk), wait);
747 /* the socket is readable if there are any messages waiting on the Rx
749 if (!list_empty(&rx->recvmsg_q))
750 mask |= EPOLLIN | EPOLLRDNORM;
752 /* the socket is writable if there is space to add new data to the
753 * socket; there is no guarantee that any particular call in progress
754 * on the socket may have space in the Tx ACK window */
755 if (rxrpc_writable(sk))
756 mask |= EPOLLOUT | EPOLLWRNORM;
762 * create an RxRPC socket
764 static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
767 struct rxrpc_net *rxnet;
768 struct rxrpc_sock *rx;
771 _enter("%p,%d", sock, protocol);
773 /* we support transport protocol UDP/UDP6 only */
774 if (protocol != PF_INET &&
775 IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6)
776 return -EPROTONOSUPPORT;
778 if (sock->type != SOCK_DGRAM)
779 return -ESOCKTNOSUPPORT;
781 sock->ops = &rxrpc_rpc_ops;
782 sock->state = SS_UNCONNECTED;
784 sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern);
788 sock_init_data(sock, sk);
789 sock_set_flag(sk, SOCK_RCU_FREE);
790 sk->sk_state = RXRPC_UNBOUND;
791 sk->sk_write_space = rxrpc_write_space;
792 sk->sk_max_ack_backlog = 0;
793 sk->sk_destruct = rxrpc_sock_destructor;
796 rx->family = protocol;
799 spin_lock_init(&rx->incoming_lock);
800 INIT_LIST_HEAD(&rx->sock_calls);
801 INIT_LIST_HEAD(&rx->to_be_accepted);
802 INIT_LIST_HEAD(&rx->recvmsg_q);
803 rwlock_init(&rx->recvmsg_lock);
804 rwlock_init(&rx->call_lock);
805 memset(&rx->srx, 0, sizeof(rx->srx));
807 rxnet = rxrpc_net(sock_net(&rx->sk));
808 timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1);
810 _leave(" = 0 [%p]", rx);
815 * Kill all the calls on a socket and shut it down.
817 static int rxrpc_shutdown(struct socket *sock, int flags)
819 struct sock *sk = sock->sk;
820 struct rxrpc_sock *rx = rxrpc_sk(sk);
823 _enter("%p,%d", sk, flags);
825 if (flags != SHUT_RDWR)
827 if (sk->sk_state == RXRPC_CLOSE)
832 spin_lock_bh(&sk->sk_receive_queue.lock);
833 if (sk->sk_state < RXRPC_CLOSE) {
834 sk->sk_state = RXRPC_CLOSE;
835 sk->sk_shutdown = SHUTDOWN_MASK;
839 spin_unlock_bh(&sk->sk_receive_queue.lock);
841 rxrpc_discard_prealloc(rx);
848 * RxRPC socket destructor
850 static void rxrpc_sock_destructor(struct sock *sk)
854 rxrpc_purge_queue(&sk->sk_receive_queue);
856 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
857 WARN_ON(!sk_unhashed(sk));
858 WARN_ON(sk->sk_socket);
860 if (!sock_flag(sk, SOCK_DEAD)) {
861 printk("Attempt to release alive rxrpc socket: %p\n", sk);
867 * release an RxRPC socket
869 static int rxrpc_release_sock(struct sock *sk)
871 struct rxrpc_sock *rx = rxrpc_sk(sk);
872 struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
874 _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
876 /* declare the socket closed for business */
878 sk->sk_shutdown = SHUTDOWN_MASK;
880 /* We want to kill off all connections from a service socket
881 * as fast as possible because we can't share these; client
882 * sockets, on the other hand, can share an endpoint.
884 switch (sk->sk_state) {
885 case RXRPC_SERVER_BOUND:
886 case RXRPC_SERVER_BOUND2:
887 case RXRPC_SERVER_LISTENING:
888 case RXRPC_SERVER_LISTEN_DISABLED:
889 rx->local->service_closed = true;
893 spin_lock_bh(&sk->sk_receive_queue.lock);
894 sk->sk_state = RXRPC_CLOSE;
895 spin_unlock_bh(&sk->sk_receive_queue.lock);
897 if (rx->local && rcu_access_pointer(rx->local->service) == rx) {
898 write_lock(&rx->local->services_lock);
899 rcu_assign_pointer(rx->local->service, NULL);
900 write_unlock(&rx->local->services_lock);
903 /* try to flush out this socket */
904 rxrpc_discard_prealloc(rx);
905 rxrpc_release_calls_on_socket(rx);
906 flush_workqueue(rxrpc_workqueue);
907 rxrpc_purge_queue(&sk->sk_receive_queue);
908 rxrpc_queue_work(&rxnet->service_conn_reaper);
909 rxrpc_queue_work(&rxnet->client_conn_reaper);
911 rxrpc_put_local(rx->local);
915 key_put(rx->securities);
916 rx->securities = NULL;
924 * release an RxRPC BSD socket on close() or equivalent
926 static int rxrpc_release(struct socket *sock)
928 struct sock *sk = sock->sk;
930 _enter("%p{%p}", sock, sk);
937 return rxrpc_release_sock(sk);
941 * RxRPC network protocol
943 static const struct proto_ops rxrpc_rpc_ops = {
945 .owner = THIS_MODULE,
946 .release = rxrpc_release,
948 .connect = rxrpc_connect,
949 .socketpair = sock_no_socketpair,
950 .accept = sock_no_accept,
951 .getname = sock_no_getname,
953 .ioctl = sock_no_ioctl,
954 .listen = rxrpc_listen,
955 .shutdown = rxrpc_shutdown,
956 .setsockopt = rxrpc_setsockopt,
957 .getsockopt = rxrpc_getsockopt,
958 .sendmsg = rxrpc_sendmsg,
959 .recvmsg = rxrpc_recvmsg,
960 .mmap = sock_no_mmap,
961 .sendpage = sock_no_sendpage,
964 static struct proto rxrpc_proto = {
966 .owner = THIS_MODULE,
967 .obj_size = sizeof(struct rxrpc_sock),
968 .max_header = sizeof(struct rxrpc_wire_header),
971 static const struct net_proto_family rxrpc_family_ops = {
973 .create = rxrpc_create,
974 .owner = THIS_MODULE,
978 * initialise and register the RxRPC protocol
980 static int __init af_rxrpc_init(void)
985 BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb));
987 get_random_bytes(&tmp, sizeof(tmp));
991 idr_set_cursor(&rxrpc_client_conn_ids, tmp);
994 rxrpc_call_jar = kmem_cache_create(
995 "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
996 SLAB_HWCACHE_ALIGN, NULL);
997 if (!rxrpc_call_jar) {
998 pr_notice("Failed to allocate call jar\n");
1002 rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1);
1003 if (!rxrpc_workqueue) {
1004 pr_notice("Failed to allocate work queue\n");
1005 goto error_work_queue;
1008 ret = rxrpc_init_security();
1010 pr_crit("Cannot initialise security\n");
1011 goto error_security;
1014 ret = register_pernet_subsys(&rxrpc_net_ops);
1018 ret = proto_register(&rxrpc_proto, 1);
1020 pr_crit("Cannot register protocol\n");
1024 ret = sock_register(&rxrpc_family_ops);
1026 pr_crit("Cannot register socket family\n");
1030 ret = register_key_type(&key_type_rxrpc);
1032 pr_crit("Cannot register client key type\n");
1033 goto error_key_type;
1036 ret = register_key_type(&key_type_rxrpc_s);
1038 pr_crit("Cannot register server key type\n");
1039 goto error_key_type_s;
1042 ret = rxrpc_sysctl_init();
1044 pr_crit("Cannot register sysctls\n");
1051 unregister_key_type(&key_type_rxrpc_s);
1053 unregister_key_type(&key_type_rxrpc);
1055 sock_unregister(PF_RXRPC);
1057 proto_unregister(&rxrpc_proto);
1059 unregister_pernet_subsys(&rxrpc_net_ops);
1061 rxrpc_exit_security();
1063 destroy_workqueue(rxrpc_workqueue);
1065 kmem_cache_destroy(rxrpc_call_jar);
1071 * unregister the RxRPC protocol
1073 static void __exit af_rxrpc_exit(void)
1076 rxrpc_sysctl_exit();
1077 unregister_key_type(&key_type_rxrpc_s);
1078 unregister_key_type(&key_type_rxrpc);
1079 sock_unregister(PF_RXRPC);
1080 proto_unregister(&rxrpc_proto);
1081 unregister_pernet_subsys(&rxrpc_net_ops);
1082 ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
1083 ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
1085 /* Make sure the local and peer records pinned by any dying connections
1089 rxrpc_destroy_client_conn_ids();
1091 destroy_workqueue(rxrpc_workqueue);
1092 rxrpc_exit_security();
1093 kmem_cache_destroy(rxrpc_call_jar);
1097 module_init(af_rxrpc_init);
1098 module_exit(af_rxrpc_exit);