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, S_IWUSR | S_IRUGO);
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;
44 /* count of skbs currently in use */
45 atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
47 struct workqueue_struct *rxrpc_workqueue;
49 static void rxrpc_sock_destructor(struct sock *);
52 * see if an RxRPC socket is currently writable
54 static inline int rxrpc_writable(struct sock *sk)
56 return refcount_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf;
60 * wait for write bufferage to become available
62 static void rxrpc_write_space(struct sock *sk)
66 if (rxrpc_writable(sk)) {
67 struct socket_wq *wq = rcu_dereference(sk->sk_wq);
69 if (skwq_has_sleeper(wq))
70 wake_up_interruptible(&wq->wait);
71 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
77 * validate an RxRPC address
79 static int rxrpc_validate_address(struct rxrpc_sock *rx,
80 struct sockaddr_rxrpc *srx,
85 if (len < sizeof(struct sockaddr_rxrpc))
88 if (srx->srx_family != AF_RXRPC)
91 if (srx->transport_type != SOCK_DGRAM)
92 return -ESOCKTNOSUPPORT;
94 len -= offsetof(struct sockaddr_rxrpc, transport);
95 if (srx->transport_len < sizeof(sa_family_t) ||
96 srx->transport_len > len)
99 if (srx->transport.family != rx->family)
100 return -EAFNOSUPPORT;
102 switch (srx->transport.family) {
104 if (srx->transport_len < sizeof(struct sockaddr_in))
106 tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad);
109 #ifdef CONFIG_AF_RXRPC_IPV6
111 if (srx->transport_len < sizeof(struct sockaddr_in6))
113 tail = offsetof(struct sockaddr_rxrpc, transport) +
114 sizeof(struct sockaddr_in6);
119 return -EAFNOSUPPORT;
123 memset((void *)srx + tail, 0, len - tail);
124 _debug("INET: %pISp", &srx->transport);
129 * bind a local address to an RxRPC socket
131 static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
133 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;
134 struct rxrpc_local *local;
135 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
136 u16 service_id = srx->srx_service;
139 _enter("%p,%p,%d", rx, saddr, len);
141 ret = rxrpc_validate_address(rx, srx, len);
147 switch (rx->sk.sk_state) {
150 local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx);
152 ret = PTR_ERR(local);
157 write_lock(&local->services_lock);
158 if (rcu_access_pointer(local->service))
161 rcu_assign_pointer(local->service, rx);
162 write_unlock(&local->services_lock);
164 rx->sk.sk_state = RXRPC_SERVER_BOUND;
167 rx->sk.sk_state = RXRPC_CLIENT_BOUND;
171 case RXRPC_SERVER_BOUND:
176 if (service_id == rx->srx.srx_service)
179 srx->srx_service = rx->srx.srx_service;
180 if (memcmp(srx, &rx->srx, sizeof(*srx)) != 0)
182 rx->second_service = service_id;
183 rx->sk.sk_state = RXRPC_SERVER_BOUND2;
191 release_sock(&rx->sk);
196 write_unlock(&local->services_lock);
197 rxrpc_put_local(local);
200 release_sock(&rx->sk);
202 _leave(" = %d", ret);
207 * set the number of pending calls permitted on a listening socket
209 static int rxrpc_listen(struct socket *sock, int backlog)
211 struct sock *sk = sock->sk;
212 struct rxrpc_sock *rx = rxrpc_sk(sk);
213 unsigned int max, old;
216 _enter("%p,%d", rx, backlog);
220 switch (rx->sk.sk_state) {
222 ret = -EADDRNOTAVAIL;
224 case RXRPC_SERVER_BOUND:
225 case RXRPC_SERVER_BOUND2:
226 ASSERT(rx->local != NULL);
227 max = READ_ONCE(rxrpc_max_backlog);
229 if (backlog == INT_MAX)
231 else if (backlog < 0 || backlog > max)
233 old = sk->sk_max_ack_backlog;
234 sk->sk_max_ack_backlog = backlog;
235 ret = rxrpc_service_prealloc(rx, GFP_KERNEL);
237 rx->sk.sk_state = RXRPC_SERVER_LISTENING;
239 sk->sk_max_ack_backlog = old;
241 case RXRPC_SERVER_LISTENING:
243 rx->sk.sk_state = RXRPC_SERVER_LISTEN_DISABLED;
244 sk->sk_max_ack_backlog = 0;
245 rxrpc_discard_prealloc(rx);
255 release_sock(&rx->sk);
256 _leave(" = %d", ret);
261 * rxrpc_kernel_begin_call - Allow a kernel service to begin a call
262 * @sock: The socket on which to make the call
263 * @srx: The address of the peer to contact
264 * @key: The security context to use (defaults to socket setting)
265 * @user_call_ID: The ID to use
266 * @tx_total_len: Total length of data to transmit during the call (or -1)
267 * @gfp: The allocation constraints
268 * @notify_rx: Where to send notifications instead of socket queue
269 * @upgrade: Request service upgrade for call
271 * Allow a kernel service to begin a call on the nominated socket. This just
272 * sets up all the internal tracking structures and allocates connection and
273 * call IDs as appropriate. The call to be used is returned.
275 * The default socket destination address and security may be overridden by
276 * supplying @srx and @key.
278 struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
279 struct sockaddr_rxrpc *srx,
281 unsigned long user_call_ID,
284 rxrpc_notify_rx_t notify_rx,
287 struct rxrpc_conn_parameters cp;
288 struct rxrpc_call_params p;
289 struct rxrpc_call *call;
290 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
293 _enter(",,%x,%lx", key_serial(key), user_call_ID);
295 ret = rxrpc_validate_address(rx, srx, sizeof(*srx));
303 if (key && !key->payload.data[0])
304 key = NULL; /* a no-security key */
306 memset(&p, 0, sizeof(p));
307 p.user_call_ID = user_call_ID;
308 p.tx_total_len = tx_total_len;
310 memset(&cp, 0, sizeof(cp));
311 cp.local = rx->local;
313 cp.security_level = 0;
314 cp.exclusive = false;
315 cp.upgrade = upgrade;
316 cp.service_id = srx->srx_service;
317 call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp);
318 /* The socket has been unlocked. */
320 call->notify_rx = notify_rx;
321 mutex_unlock(&call->user_mutex);
324 _leave(" = %p", call);
327 EXPORT_SYMBOL(rxrpc_kernel_begin_call);
330 * Dummy function used to stop the notifier talking to recvmsg().
332 static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall,
333 unsigned long call_user_ID)
338 * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
339 * @sock: The socket the call is on
340 * @call: The call to end
342 * Allow a kernel service to end a call it was using. The call must be
343 * complete before this is called (the call should be aborted if necessary).
345 void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call)
347 _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
349 mutex_lock(&call->user_mutex);
350 rxrpc_release_call(rxrpc_sk(sock->sk), call);
352 /* Make sure we're not going to call back into a kernel service */
353 if (call->notify_rx) {
354 spin_lock_bh(&call->notify_lock);
355 call->notify_rx = rxrpc_dummy_notify_rx;
356 spin_unlock_bh(&call->notify_lock);
359 mutex_unlock(&call->user_mutex);
360 rxrpc_put_call(call, rxrpc_call_put_kernel);
362 EXPORT_SYMBOL(rxrpc_kernel_end_call);
365 * rxrpc_kernel_check_life - Check to see whether a call is still alive
366 * @sock: The socket the call is on
367 * @call: The call to check
369 * Allow a kernel service to find out whether a call is still alive - ie. we're
370 * getting ACKs from the server. Returns a number representing the life state
371 * which can be compared to that returned by a previous call.
373 * If this is a client call, ping ACKs will be sent to the server to find out
374 * whether it's still responsive and whether the call is still alive on the
377 u32 rxrpc_kernel_check_life(struct socket *sock, struct rxrpc_call *call)
379 return call->acks_latest;
381 EXPORT_SYMBOL(rxrpc_kernel_check_life);
384 * rxrpc_kernel_check_call - Check a call's state
385 * @sock: The socket the call is on
386 * @call: The call to check
387 * @_compl: Where to store the completion state
388 * @_abort_code: Where to store any abort code
390 * Allow a kernel service to query the state of a call and find out the manner
391 * of its termination if it has completed. Returns -EINPROGRESS if the call is
392 * still going, 0 if the call finished successfully, -ECONNABORTED if the call
393 * was aborted and an appropriate error if the call failed in some other way.
395 int rxrpc_kernel_check_call(struct socket *sock, struct rxrpc_call *call,
396 enum rxrpc_call_completion *_compl, u32 *_abort_code)
398 if (call->state != RXRPC_CALL_COMPLETE)
401 *_compl = call->completion;
402 *_abort_code = call->abort_code;
405 EXPORT_SYMBOL(rxrpc_kernel_check_call);
408 * rxrpc_kernel_retry_call - Allow a kernel service to retry a call
409 * @sock: The socket the call is on
410 * @call: The call to retry
411 * @srx: The address of the peer to contact
412 * @key: The security context to use (defaults to socket setting)
414 * Allow a kernel service to try resending a client call that failed due to a
415 * network error to a new address. The Tx queue is maintained intact, thereby
416 * relieving the need to re-encrypt any request data that has already been
419 int rxrpc_kernel_retry_call(struct socket *sock, struct rxrpc_call *call,
420 struct sockaddr_rxrpc *srx, struct key *key)
422 struct rxrpc_conn_parameters cp;
423 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
426 _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
430 if (key && !key->payload.data[0])
431 key = NULL; /* a no-security key */
433 memset(&cp, 0, sizeof(cp));
434 cp.local = rx->local;
436 cp.security_level = 0;
437 cp.exclusive = false;
438 cp.service_id = srx->srx_service;
440 mutex_lock(&call->user_mutex);
442 ret = rxrpc_prepare_call_for_retry(rx, call);
444 ret = rxrpc_retry_client_call(rx, call, &cp, srx, GFP_KERNEL);
446 mutex_unlock(&call->user_mutex);
447 _leave(" = %d", ret);
450 EXPORT_SYMBOL(rxrpc_kernel_retry_call);
453 * rxrpc_kernel_new_call_notification - Get notifications of new calls
454 * @sock: The socket to intercept received messages on
455 * @notify_new_call: Function to be called when new calls appear
456 * @discard_new_call: Function to discard preallocated calls
458 * Allow a kernel service to be given notifications about new calls.
460 void rxrpc_kernel_new_call_notification(
462 rxrpc_notify_new_call_t notify_new_call,
463 rxrpc_discard_new_call_t discard_new_call)
465 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
467 rx->notify_new_call = notify_new_call;
468 rx->discard_new_call = discard_new_call;
470 EXPORT_SYMBOL(rxrpc_kernel_new_call_notification);
473 * connect an RxRPC socket
474 * - this just targets it at a specific destination; no actual connection
475 * negotiation takes place
477 static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
478 int addr_len, int flags)
480 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr;
481 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
484 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
486 ret = rxrpc_validate_address(rx, srx, addr_len);
488 _leave(" = %d [bad addr]", ret);
495 if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags))
498 switch (rx->sk.sk_state) {
500 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
501 case RXRPC_CLIENT_UNBOUND:
502 case RXRPC_CLIENT_BOUND:
509 rx->connect_srx = *srx;
510 set_bit(RXRPC_SOCK_CONNECTED, &rx->flags);
514 release_sock(&rx->sk);
519 * send a message through an RxRPC socket
520 * - in a client this does a number of things:
521 * - finds/sets up a connection for the security specified (if any)
522 * - initiates a call (ID in control data)
523 * - ends the request phase of a call (if MSG_MORE is not set)
524 * - sends a call data packet
525 * - may send an abort (abort code in control data)
527 static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
529 struct rxrpc_local *local;
530 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
533 _enter(",{%d},,%zu", rx->sk.sk_state, len);
535 if (m->msg_flags & MSG_OOB)
539 ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
541 _leave(" = %d [bad addr]", ret);
548 switch (rx->sk.sk_state) {
550 rx->srx.srx_family = AF_RXRPC;
551 rx->srx.srx_service = 0;
552 rx->srx.transport_type = SOCK_DGRAM;
553 rx->srx.transport.family = rx->family;
554 switch (rx->family) {
556 rx->srx.transport_len = sizeof(struct sockaddr_in);
558 #ifdef CONFIG_AF_RXRPC_IPV6
560 rx->srx.transport_len = sizeof(struct sockaddr_in6);
567 local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);
569 ret = PTR_ERR(local);
574 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
577 case RXRPC_CLIENT_UNBOUND:
578 case RXRPC_CLIENT_BOUND:
580 test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) {
581 m->msg_name = &rx->connect_srx;
582 m->msg_namelen = sizeof(rx->connect_srx);
585 case RXRPC_SERVER_BOUND:
586 case RXRPC_SERVER_LISTENING:
587 ret = rxrpc_do_sendmsg(rx, m, len);
588 /* The socket has been unlocked */
596 release_sock(&rx->sk);
598 _leave(" = %d", ret);
603 * set RxRPC socket options
605 static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
606 char __user *optval, unsigned int optlen)
608 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
609 unsigned int min_sec_level;
610 u16 service_upgrade[2];
613 _enter(",%d,%d,,%d", level, optname, optlen);
618 if (level == SOL_RXRPC) {
620 case RXRPC_EXCLUSIVE_CONNECTION:
625 if (rx->sk.sk_state != RXRPC_UNBOUND)
627 rx->exclusive = true;
630 case RXRPC_SECURITY_KEY:
635 if (rx->sk.sk_state != RXRPC_UNBOUND)
637 ret = rxrpc_request_key(rx, optval, optlen);
640 case RXRPC_SECURITY_KEYRING:
645 if (rx->sk.sk_state != RXRPC_UNBOUND)
647 ret = rxrpc_server_keyring(rx, optval, optlen);
650 case RXRPC_MIN_SECURITY_LEVEL:
652 if (optlen != sizeof(unsigned int))
655 if (rx->sk.sk_state != RXRPC_UNBOUND)
657 ret = get_user(min_sec_level,
658 (unsigned int __user *) optval);
662 if (min_sec_level > RXRPC_SECURITY_MAX)
664 rx->min_sec_level = min_sec_level;
667 case RXRPC_UPGRADEABLE_SERVICE:
669 if (optlen != sizeof(service_upgrade) ||
670 rx->service_upgrade.from != 0)
673 if (rx->sk.sk_state != RXRPC_SERVER_BOUND2)
676 if (copy_from_user(service_upgrade, optval,
677 sizeof(service_upgrade)) != 0)
680 if ((service_upgrade[0] != rx->srx.srx_service ||
681 service_upgrade[1] != rx->second_service) &&
682 (service_upgrade[0] != rx->second_service ||
683 service_upgrade[1] != rx->srx.srx_service))
685 rx->service_upgrade.from = service_upgrade[0];
686 rx->service_upgrade.to = service_upgrade[1];
697 release_sock(&rx->sk);
702 * Get socket options.
704 static int rxrpc_getsockopt(struct socket *sock, int level, int optname,
705 char __user *optval, int __user *_optlen)
709 if (level != SOL_RXRPC)
712 if (get_user(optlen, _optlen))
716 case RXRPC_SUPPORTED_CMSG:
717 if (optlen < sizeof(int))
719 if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) ||
720 put_user(sizeof(int), _optlen))
730 * permit an RxRPC socket to be polled
732 static unsigned int rxrpc_poll(struct file *file, struct socket *sock,
735 struct sock *sk = sock->sk;
736 struct rxrpc_sock *rx = rxrpc_sk(sk);
739 sock_poll_wait(file, sk_sleep(sk), wait);
742 /* the socket is readable if there are any messages waiting on the Rx
744 if (!list_empty(&rx->recvmsg_q))
745 mask |= POLLIN | POLLRDNORM;
747 /* the socket is writable if there is space to add new data to the
748 * socket; there is no guarantee that any particular call in progress
749 * on the socket may have space in the Tx ACK window */
750 if (rxrpc_writable(sk))
751 mask |= POLLOUT | POLLWRNORM;
757 * create an RxRPC socket
759 static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
762 struct rxrpc_sock *rx;
765 _enter("%p,%d", sock, protocol);
767 /* we support transport protocol UDP/UDP6 only */
768 if (protocol != PF_INET &&
769 IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6)
770 return -EPROTONOSUPPORT;
772 if (sock->type != SOCK_DGRAM)
773 return -ESOCKTNOSUPPORT;
775 sock->ops = &rxrpc_rpc_ops;
776 sock->state = SS_UNCONNECTED;
778 sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern);
782 sock_init_data(sock, sk);
783 sock_set_flag(sk, SOCK_RCU_FREE);
784 sk->sk_state = RXRPC_UNBOUND;
785 sk->sk_write_space = rxrpc_write_space;
786 sk->sk_max_ack_backlog = 0;
787 sk->sk_destruct = rxrpc_sock_destructor;
790 rx->family = protocol;
793 spin_lock_init(&rx->incoming_lock);
794 INIT_LIST_HEAD(&rx->sock_calls);
795 INIT_LIST_HEAD(&rx->to_be_accepted);
796 INIT_LIST_HEAD(&rx->recvmsg_q);
797 rwlock_init(&rx->recvmsg_lock);
798 rwlock_init(&rx->call_lock);
799 memset(&rx->srx, 0, sizeof(rx->srx));
801 _leave(" = 0 [%p]", rx);
806 * Kill all the calls on a socket and shut it down.
808 static int rxrpc_shutdown(struct socket *sock, int flags)
810 struct sock *sk = sock->sk;
811 struct rxrpc_sock *rx = rxrpc_sk(sk);
814 _enter("%p,%d", sk, flags);
816 if (flags != SHUT_RDWR)
818 if (sk->sk_state == RXRPC_CLOSE)
823 spin_lock_bh(&sk->sk_receive_queue.lock);
824 if (sk->sk_state < RXRPC_CLOSE) {
825 sk->sk_state = RXRPC_CLOSE;
826 sk->sk_shutdown = SHUTDOWN_MASK;
830 spin_unlock_bh(&sk->sk_receive_queue.lock);
832 rxrpc_discard_prealloc(rx);
839 * RxRPC socket destructor
841 static void rxrpc_sock_destructor(struct sock *sk)
845 rxrpc_purge_queue(&sk->sk_receive_queue);
847 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
848 WARN_ON(!sk_unhashed(sk));
849 WARN_ON(sk->sk_socket);
851 if (!sock_flag(sk, SOCK_DEAD)) {
852 printk("Attempt to release alive rxrpc socket: %p\n", sk);
858 * release an RxRPC socket
860 static int rxrpc_release_sock(struct sock *sk)
862 struct rxrpc_sock *rx = rxrpc_sk(sk);
863 struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
865 _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
867 /* declare the socket closed for business */
869 sk->sk_shutdown = SHUTDOWN_MASK;
871 /* We want to kill off all connections from a service socket
872 * as fast as possible because we can't share these; client
873 * sockets, on the other hand, can share an endpoint.
875 switch (sk->sk_state) {
876 case RXRPC_SERVER_BOUND:
877 case RXRPC_SERVER_BOUND2:
878 case RXRPC_SERVER_LISTENING:
879 case RXRPC_SERVER_LISTEN_DISABLED:
880 rx->local->service_closed = true;
884 spin_lock_bh(&sk->sk_receive_queue.lock);
885 sk->sk_state = RXRPC_CLOSE;
886 spin_unlock_bh(&sk->sk_receive_queue.lock);
888 if (rx->local && rcu_access_pointer(rx->local->service) == rx) {
889 write_lock(&rx->local->services_lock);
890 rcu_assign_pointer(rx->local->service, NULL);
891 write_unlock(&rx->local->services_lock);
894 /* try to flush out this socket */
895 rxrpc_discard_prealloc(rx);
896 rxrpc_release_calls_on_socket(rx);
897 flush_workqueue(rxrpc_workqueue);
898 rxrpc_purge_queue(&sk->sk_receive_queue);
899 rxrpc_queue_work(&rxnet->service_conn_reaper);
900 rxrpc_queue_work(&rxnet->client_conn_reaper);
902 rxrpc_put_local(rx->local);
906 key_put(rx->securities);
907 rx->securities = NULL;
915 * release an RxRPC BSD socket on close() or equivalent
917 static int rxrpc_release(struct socket *sock)
919 struct sock *sk = sock->sk;
921 _enter("%p{%p}", sock, sk);
928 return rxrpc_release_sock(sk);
932 * RxRPC network protocol
934 static const struct proto_ops rxrpc_rpc_ops = {
936 .owner = THIS_MODULE,
937 .release = rxrpc_release,
939 .connect = rxrpc_connect,
940 .socketpair = sock_no_socketpair,
941 .accept = sock_no_accept,
942 .getname = sock_no_getname,
944 .ioctl = sock_no_ioctl,
945 .listen = rxrpc_listen,
946 .shutdown = rxrpc_shutdown,
947 .setsockopt = rxrpc_setsockopt,
948 .getsockopt = rxrpc_getsockopt,
949 .sendmsg = rxrpc_sendmsg,
950 .recvmsg = rxrpc_recvmsg,
951 .mmap = sock_no_mmap,
952 .sendpage = sock_no_sendpage,
955 static struct proto rxrpc_proto = {
957 .owner = THIS_MODULE,
958 .obj_size = sizeof(struct rxrpc_sock),
959 .max_header = sizeof(struct rxrpc_wire_header),
962 static const struct net_proto_family rxrpc_family_ops = {
964 .create = rxrpc_create,
965 .owner = THIS_MODULE,
969 * initialise and register the RxRPC protocol
971 static int __init af_rxrpc_init(void)
976 BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb));
978 get_random_bytes(&tmp, sizeof(tmp));
982 idr_set_cursor(&rxrpc_client_conn_ids, tmp);
985 rxrpc_call_jar = kmem_cache_create(
986 "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
987 SLAB_HWCACHE_ALIGN, NULL);
988 if (!rxrpc_call_jar) {
989 pr_notice("Failed to allocate call jar\n");
993 rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1);
994 if (!rxrpc_workqueue) {
995 pr_notice("Failed to allocate work queue\n");
996 goto error_work_queue;
999 ret = rxrpc_init_security();
1001 pr_crit("Cannot initialise security\n");
1002 goto error_security;
1005 ret = register_pernet_subsys(&rxrpc_net_ops);
1009 ret = proto_register(&rxrpc_proto, 1);
1011 pr_crit("Cannot register protocol\n");
1015 ret = sock_register(&rxrpc_family_ops);
1017 pr_crit("Cannot register socket family\n");
1021 ret = register_key_type(&key_type_rxrpc);
1023 pr_crit("Cannot register client key type\n");
1024 goto error_key_type;
1027 ret = register_key_type(&key_type_rxrpc_s);
1029 pr_crit("Cannot register server key type\n");
1030 goto error_key_type_s;
1033 ret = rxrpc_sysctl_init();
1035 pr_crit("Cannot register sysctls\n");
1042 unregister_key_type(&key_type_rxrpc_s);
1044 unregister_key_type(&key_type_rxrpc);
1046 sock_unregister(PF_RXRPC);
1048 proto_unregister(&rxrpc_proto);
1050 unregister_pernet_subsys(&rxrpc_net_ops);
1052 rxrpc_exit_security();
1054 destroy_workqueue(rxrpc_workqueue);
1056 kmem_cache_destroy(rxrpc_call_jar);
1062 * unregister the RxRPC protocol
1064 static void __exit af_rxrpc_exit(void)
1067 rxrpc_sysctl_exit();
1068 unregister_key_type(&key_type_rxrpc_s);
1069 unregister_key_type(&key_type_rxrpc);
1070 sock_unregister(PF_RXRPC);
1071 proto_unregister(&rxrpc_proto);
1072 unregister_pernet_subsys(&rxrpc_net_ops);
1073 ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
1074 ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
1076 /* Make sure the local and peer records pinned by any dying connections
1080 rxrpc_destroy_client_conn_ids();
1082 destroy_workqueue(rxrpc_workqueue);
1083 rxrpc_exit_security();
1084 kmem_cache_destroy(rxrpc_call_jar);
1088 module_init(af_rxrpc_init);
1089 module_exit(af_rxrpc_exit);