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 srx->transport.family == AF_INET && rx->family != AF_INET6)
102 return -EAFNOSUPPORT;
104 switch (srx->transport.family) {
106 if (srx->transport_len < sizeof(struct sockaddr_in))
108 tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad);
111 #ifdef CONFIG_AF_RXRPC_IPV6
113 if (srx->transport_len < sizeof(struct sockaddr_in6))
115 tail = offsetof(struct sockaddr_rxrpc, transport) +
116 sizeof(struct sockaddr_in6);
121 return -EAFNOSUPPORT;
125 memset((void *)srx + tail, 0, len - tail);
126 _debug("INET: %pISp", &srx->transport);
131 * bind a local address to an RxRPC socket
133 static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
135 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;
136 struct rxrpc_local *local;
137 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
141 _enter("%p,%p,%d", rx, saddr, len);
143 ret = rxrpc_validate_address(rx, srx, len);
146 service_id = srx->srx_service;
150 switch (rx->sk.sk_state) {
153 local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx);
155 ret = PTR_ERR(local);
160 write_lock(&local->services_lock);
161 if (rcu_access_pointer(local->service))
164 rcu_assign_pointer(local->service, rx);
165 write_unlock(&local->services_lock);
167 rx->sk.sk_state = RXRPC_SERVER_BOUND;
170 rx->sk.sk_state = RXRPC_CLIENT_BOUND;
174 case RXRPC_SERVER_BOUND:
179 if (service_id == rx->srx.srx_service)
182 srx->srx_service = rx->srx.srx_service;
183 if (memcmp(srx, &rx->srx, sizeof(*srx)) != 0)
185 rx->second_service = service_id;
186 rx->sk.sk_state = RXRPC_SERVER_BOUND2;
194 release_sock(&rx->sk);
199 write_unlock(&local->services_lock);
200 rxrpc_put_local(local);
203 release_sock(&rx->sk);
205 _leave(" = %d", ret);
210 * set the number of pending calls permitted on a listening socket
212 static int rxrpc_listen(struct socket *sock, int backlog)
214 struct sock *sk = sock->sk;
215 struct rxrpc_sock *rx = rxrpc_sk(sk);
216 unsigned int max, old;
219 _enter("%p,%d", rx, backlog);
223 switch (rx->sk.sk_state) {
225 ret = -EADDRNOTAVAIL;
227 case RXRPC_SERVER_BOUND:
228 case RXRPC_SERVER_BOUND2:
229 ASSERT(rx->local != NULL);
230 max = READ_ONCE(rxrpc_max_backlog);
232 if (backlog == INT_MAX)
234 else if (backlog < 0 || backlog > max)
236 old = sk->sk_max_ack_backlog;
237 sk->sk_max_ack_backlog = backlog;
238 ret = rxrpc_service_prealloc(rx, GFP_KERNEL);
240 rx->sk.sk_state = RXRPC_SERVER_LISTENING;
242 sk->sk_max_ack_backlog = old;
244 case RXRPC_SERVER_LISTENING:
246 rx->sk.sk_state = RXRPC_SERVER_LISTEN_DISABLED;
247 sk->sk_max_ack_backlog = 0;
248 rxrpc_discard_prealloc(rx);
258 release_sock(&rx->sk);
259 _leave(" = %d", ret);
264 * rxrpc_kernel_begin_call - Allow a kernel service to begin a call
265 * @sock: The socket on which to make the call
266 * @srx: The address of the peer to contact
267 * @key: The security context to use (defaults to socket setting)
268 * @user_call_ID: The ID to use
269 * @tx_total_len: Total length of data to transmit during the call (or -1)
270 * @gfp: The allocation constraints
271 * @notify_rx: Where to send notifications instead of socket queue
272 * @upgrade: Request service upgrade for call
273 * @debug_id: The debug ID for tracing to be assigned to the call
275 * Allow a kernel service to begin a call on the nominated socket. This just
276 * sets up all the internal tracking structures and allocates connection and
277 * call IDs as appropriate. The call to be used is returned.
279 * The default socket destination address and security may be overridden by
280 * supplying @srx and @key.
282 struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
283 struct sockaddr_rxrpc *srx,
285 unsigned long user_call_ID,
288 rxrpc_notify_rx_t notify_rx,
290 unsigned int debug_id)
292 struct rxrpc_conn_parameters cp;
293 struct rxrpc_call_params p;
294 struct rxrpc_call *call;
295 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
298 _enter(",,%x,%lx", key_serial(key), user_call_ID);
300 ret = rxrpc_validate_address(rx, srx, sizeof(*srx));
308 if (key && !key->payload.data[0])
309 key = NULL; /* a no-security key */
311 memset(&p, 0, sizeof(p));
312 p.user_call_ID = user_call_ID;
313 p.tx_total_len = tx_total_len;
315 memset(&cp, 0, sizeof(cp));
316 cp.local = rx->local;
318 cp.security_level = rx->min_sec_level;
319 cp.exclusive = false;
320 cp.upgrade = upgrade;
321 cp.service_id = srx->srx_service;
322 call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id);
323 /* The socket has been unlocked. */
325 call->notify_rx = notify_rx;
326 mutex_unlock(&call->user_mutex);
329 rxrpc_put_peer(cp.peer);
330 _leave(" = %p", call);
333 EXPORT_SYMBOL(rxrpc_kernel_begin_call);
336 * Dummy function used to stop the notifier talking to recvmsg().
338 static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall,
339 unsigned long call_user_ID)
344 * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
345 * @sock: The socket the call is on
346 * @call: The call to end
348 * Allow a kernel service to end a call it was using. The call must be
349 * complete before this is called (the call should be aborted if necessary).
351 void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call)
353 _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
355 mutex_lock(&call->user_mutex);
356 rxrpc_release_call(rxrpc_sk(sock->sk), call);
358 /* Make sure we're not going to call back into a kernel service */
359 if (call->notify_rx) {
360 spin_lock_bh(&call->notify_lock);
361 call->notify_rx = rxrpc_dummy_notify_rx;
362 spin_unlock_bh(&call->notify_lock);
365 mutex_unlock(&call->user_mutex);
366 rxrpc_put_call(call, rxrpc_call_put_kernel);
368 EXPORT_SYMBOL(rxrpc_kernel_end_call);
371 * rxrpc_kernel_check_life - Check to see whether a call is still alive
372 * @sock: The socket the call is on
373 * @call: The call to check
374 * @_life: Where to store the life value
376 * Allow a kernel service to find out whether a call is still alive - ie. we're
377 * getting ACKs from the server. Passes back in *_life a number representing
378 * the life state which can be compared to that returned by a previous call and
379 * return true if the call is still alive.
381 * If the life state stalls, rxrpc_kernel_probe_life() should be called and
384 bool rxrpc_kernel_check_life(const struct socket *sock,
385 const struct rxrpc_call *call,
388 *_life = call->acks_latest;
389 return call->state != RXRPC_CALL_COMPLETE;
391 EXPORT_SYMBOL(rxrpc_kernel_check_life);
394 * rxrpc_kernel_probe_life - Poke the peer to see if it's still alive
395 * @sock: The socket the call is on
396 * @call: The call to check
398 * In conjunction with rxrpc_kernel_check_life(), allow a kernel service to
399 * find out whether a call is still alive by pinging it. This should cause the
400 * life state to be bumped in about 2*RTT.
402 * The must be called in TASK_RUNNING state on pain of might_sleep() objecting.
404 void rxrpc_kernel_probe_life(struct socket *sock, struct rxrpc_call *call)
406 rxrpc_propose_ACK(call, RXRPC_ACK_PING, 0, 0, true, false,
407 rxrpc_propose_ack_ping_for_check_life);
408 rxrpc_send_ack_packet(call, true, NULL);
410 EXPORT_SYMBOL(rxrpc_kernel_probe_life);
413 * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call.
414 * @sock: The socket the call is on
415 * @call: The call to query
417 * Allow a kernel service to retrieve the epoch value from a service call to
418 * see if the client at the other end rebooted.
420 u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call)
422 return call->conn->proto.epoch;
424 EXPORT_SYMBOL(rxrpc_kernel_get_epoch);
427 * rxrpc_kernel_new_call_notification - Get notifications of new calls
428 * @sock: The socket to intercept received messages on
429 * @notify_new_call: Function to be called when new calls appear
430 * @discard_new_call: Function to discard preallocated calls
432 * Allow a kernel service to be given notifications about new calls.
434 void rxrpc_kernel_new_call_notification(
436 rxrpc_notify_new_call_t notify_new_call,
437 rxrpc_discard_new_call_t discard_new_call)
439 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
441 rx->notify_new_call = notify_new_call;
442 rx->discard_new_call = discard_new_call;
444 EXPORT_SYMBOL(rxrpc_kernel_new_call_notification);
447 * connect an RxRPC socket
448 * - this just targets it at a specific destination; no actual connection
449 * negotiation takes place
451 static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
452 int addr_len, int flags)
454 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr;
455 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
458 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
460 ret = rxrpc_validate_address(rx, srx, addr_len);
462 _leave(" = %d [bad addr]", ret);
469 if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags))
472 switch (rx->sk.sk_state) {
474 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
475 case RXRPC_CLIENT_UNBOUND:
476 case RXRPC_CLIENT_BOUND:
483 rx->connect_srx = *srx;
484 set_bit(RXRPC_SOCK_CONNECTED, &rx->flags);
488 release_sock(&rx->sk);
493 * send a message through an RxRPC socket
494 * - in a client this does a number of things:
495 * - finds/sets up a connection for the security specified (if any)
496 * - initiates a call (ID in control data)
497 * - ends the request phase of a call (if MSG_MORE is not set)
498 * - sends a call data packet
499 * - may send an abort (abort code in control data)
501 static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
503 struct rxrpc_local *local;
504 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
507 _enter(",{%d},,%zu", rx->sk.sk_state, len);
509 if (m->msg_flags & MSG_OOB)
513 ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
515 _leave(" = %d [bad addr]", ret);
522 switch (rx->sk.sk_state) {
524 rx->srx.srx_family = AF_RXRPC;
525 rx->srx.srx_service = 0;
526 rx->srx.transport_type = SOCK_DGRAM;
527 rx->srx.transport.family = rx->family;
528 switch (rx->family) {
530 rx->srx.transport_len = sizeof(struct sockaddr_in);
532 #ifdef CONFIG_AF_RXRPC_IPV6
534 rx->srx.transport_len = sizeof(struct sockaddr_in6);
541 local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);
543 ret = PTR_ERR(local);
548 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
551 case RXRPC_CLIENT_UNBOUND:
552 case RXRPC_CLIENT_BOUND:
554 test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) {
555 m->msg_name = &rx->connect_srx;
556 m->msg_namelen = sizeof(rx->connect_srx);
559 case RXRPC_SERVER_BOUND:
560 case RXRPC_SERVER_LISTENING:
561 ret = rxrpc_do_sendmsg(rx, m, len);
562 /* The socket has been unlocked */
570 release_sock(&rx->sk);
572 _leave(" = %d", ret);
577 * set RxRPC socket options
579 static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
580 char __user *optval, unsigned int optlen)
582 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
583 unsigned int min_sec_level;
584 u16 service_upgrade[2];
587 _enter(",%d,%d,,%d", level, optname, optlen);
592 if (level == SOL_RXRPC) {
594 case RXRPC_EXCLUSIVE_CONNECTION:
599 if (rx->sk.sk_state != RXRPC_UNBOUND)
601 rx->exclusive = true;
604 case RXRPC_SECURITY_KEY:
609 if (rx->sk.sk_state != RXRPC_UNBOUND)
611 ret = rxrpc_request_key(rx, optval, optlen);
614 case RXRPC_SECURITY_KEYRING:
619 if (rx->sk.sk_state != RXRPC_UNBOUND)
621 ret = rxrpc_server_keyring(rx, optval, optlen);
624 case RXRPC_MIN_SECURITY_LEVEL:
626 if (optlen != sizeof(unsigned int))
629 if (rx->sk.sk_state != RXRPC_UNBOUND)
631 ret = get_user(min_sec_level,
632 (unsigned int __user *) optval);
636 if (min_sec_level > RXRPC_SECURITY_MAX)
638 rx->min_sec_level = min_sec_level;
641 case RXRPC_UPGRADEABLE_SERVICE:
643 if (optlen != sizeof(service_upgrade) ||
644 rx->service_upgrade.from != 0)
647 if (rx->sk.sk_state != RXRPC_SERVER_BOUND2)
650 if (copy_from_user(service_upgrade, optval,
651 sizeof(service_upgrade)) != 0)
654 if ((service_upgrade[0] != rx->srx.srx_service ||
655 service_upgrade[1] != rx->second_service) &&
656 (service_upgrade[0] != rx->second_service ||
657 service_upgrade[1] != rx->srx.srx_service))
659 rx->service_upgrade.from = service_upgrade[0];
660 rx->service_upgrade.to = service_upgrade[1];
671 release_sock(&rx->sk);
676 * Get socket options.
678 static int rxrpc_getsockopt(struct socket *sock, int level, int optname,
679 char __user *optval, int __user *_optlen)
683 if (level != SOL_RXRPC)
686 if (get_user(optlen, _optlen))
690 case RXRPC_SUPPORTED_CMSG:
691 if (optlen < sizeof(int))
693 if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) ||
694 put_user(sizeof(int), _optlen))
704 * permit an RxRPC socket to be polled
706 static __poll_t rxrpc_poll(struct file *file, struct socket *sock,
709 struct sock *sk = sock->sk;
710 struct rxrpc_sock *rx = rxrpc_sk(sk);
713 sock_poll_wait(file, sock, wait);
716 /* the socket is readable if there are any messages waiting on the Rx
718 if (!list_empty(&rx->recvmsg_q))
719 mask |= EPOLLIN | EPOLLRDNORM;
721 /* the socket is writable if there is space to add new data to the
722 * socket; there is no guarantee that any particular call in progress
723 * on the socket may have space in the Tx ACK window */
724 if (rxrpc_writable(sk))
725 mask |= EPOLLOUT | EPOLLWRNORM;
731 * create an RxRPC socket
733 static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
736 struct rxrpc_net *rxnet;
737 struct rxrpc_sock *rx;
740 _enter("%p,%d", sock, protocol);
742 /* we support transport protocol UDP/UDP6 only */
743 if (protocol != PF_INET &&
744 IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6)
745 return -EPROTONOSUPPORT;
747 if (sock->type != SOCK_DGRAM)
748 return -ESOCKTNOSUPPORT;
750 sock->ops = &rxrpc_rpc_ops;
751 sock->state = SS_UNCONNECTED;
753 sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern);
757 sock_init_data(sock, sk);
758 sock_set_flag(sk, SOCK_RCU_FREE);
759 sk->sk_state = RXRPC_UNBOUND;
760 sk->sk_write_space = rxrpc_write_space;
761 sk->sk_max_ack_backlog = 0;
762 sk->sk_destruct = rxrpc_sock_destructor;
765 rx->family = protocol;
768 spin_lock_init(&rx->incoming_lock);
769 INIT_LIST_HEAD(&rx->sock_calls);
770 INIT_LIST_HEAD(&rx->to_be_accepted);
771 INIT_LIST_HEAD(&rx->recvmsg_q);
772 rwlock_init(&rx->recvmsg_lock);
773 rwlock_init(&rx->call_lock);
774 memset(&rx->srx, 0, sizeof(rx->srx));
776 rxnet = rxrpc_net(sock_net(&rx->sk));
777 timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1);
779 _leave(" = 0 [%p]", rx);
784 * Kill all the calls on a socket and shut it down.
786 static int rxrpc_shutdown(struct socket *sock, int flags)
788 struct sock *sk = sock->sk;
789 struct rxrpc_sock *rx = rxrpc_sk(sk);
792 _enter("%p,%d", sk, flags);
794 if (flags != SHUT_RDWR)
796 if (sk->sk_state == RXRPC_CLOSE)
801 spin_lock_bh(&sk->sk_receive_queue.lock);
802 if (sk->sk_state < RXRPC_CLOSE) {
803 sk->sk_state = RXRPC_CLOSE;
804 sk->sk_shutdown = SHUTDOWN_MASK;
808 spin_unlock_bh(&sk->sk_receive_queue.lock);
810 rxrpc_discard_prealloc(rx);
817 * RxRPC socket destructor
819 static void rxrpc_sock_destructor(struct sock *sk)
823 rxrpc_purge_queue(&sk->sk_receive_queue);
825 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
826 WARN_ON(!sk_unhashed(sk));
827 WARN_ON(sk->sk_socket);
829 if (!sock_flag(sk, SOCK_DEAD)) {
830 printk("Attempt to release alive rxrpc socket: %p\n", sk);
836 * release an RxRPC socket
838 static int rxrpc_release_sock(struct sock *sk)
840 struct rxrpc_sock *rx = rxrpc_sk(sk);
841 struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
843 _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
845 /* declare the socket closed for business */
847 sk->sk_shutdown = SHUTDOWN_MASK;
849 /* We want to kill off all connections from a service socket
850 * as fast as possible because we can't share these; client
851 * sockets, on the other hand, can share an endpoint.
853 switch (sk->sk_state) {
854 case RXRPC_SERVER_BOUND:
855 case RXRPC_SERVER_BOUND2:
856 case RXRPC_SERVER_LISTENING:
857 case RXRPC_SERVER_LISTEN_DISABLED:
858 rx->local->service_closed = true;
862 spin_lock_bh(&sk->sk_receive_queue.lock);
863 sk->sk_state = RXRPC_CLOSE;
864 spin_unlock_bh(&sk->sk_receive_queue.lock);
866 if (rx->local && rcu_access_pointer(rx->local->service) == rx) {
867 write_lock(&rx->local->services_lock);
868 rcu_assign_pointer(rx->local->service, NULL);
869 write_unlock(&rx->local->services_lock);
872 /* try to flush out this socket */
873 rxrpc_discard_prealloc(rx);
874 rxrpc_release_calls_on_socket(rx);
875 flush_workqueue(rxrpc_workqueue);
876 rxrpc_purge_queue(&sk->sk_receive_queue);
877 rxrpc_queue_work(&rxnet->service_conn_reaper);
878 rxrpc_queue_work(&rxnet->client_conn_reaper);
880 rxrpc_put_local(rx->local);
884 key_put(rx->securities);
885 rx->securities = NULL;
893 * release an RxRPC BSD socket on close() or equivalent
895 static int rxrpc_release(struct socket *sock)
897 struct sock *sk = sock->sk;
899 _enter("%p{%p}", sock, sk);
906 return rxrpc_release_sock(sk);
910 * RxRPC network protocol
912 static const struct proto_ops rxrpc_rpc_ops = {
914 .owner = THIS_MODULE,
915 .release = rxrpc_release,
917 .connect = rxrpc_connect,
918 .socketpair = sock_no_socketpair,
919 .accept = sock_no_accept,
920 .getname = sock_no_getname,
922 .ioctl = sock_no_ioctl,
923 .listen = rxrpc_listen,
924 .shutdown = rxrpc_shutdown,
925 .setsockopt = rxrpc_setsockopt,
926 .getsockopt = rxrpc_getsockopt,
927 .sendmsg = rxrpc_sendmsg,
928 .recvmsg = rxrpc_recvmsg,
929 .mmap = sock_no_mmap,
930 .sendpage = sock_no_sendpage,
933 static struct proto rxrpc_proto = {
935 .owner = THIS_MODULE,
936 .obj_size = sizeof(struct rxrpc_sock),
937 .max_header = sizeof(struct rxrpc_wire_header),
940 static const struct net_proto_family rxrpc_family_ops = {
942 .create = rxrpc_create,
943 .owner = THIS_MODULE,
947 * initialise and register the RxRPC protocol
949 static int __init af_rxrpc_init(void)
954 BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb));
956 get_random_bytes(&tmp, sizeof(tmp));
960 idr_set_cursor(&rxrpc_client_conn_ids, tmp);
963 rxrpc_call_jar = kmem_cache_create(
964 "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
965 SLAB_HWCACHE_ALIGN, NULL);
966 if (!rxrpc_call_jar) {
967 pr_notice("Failed to allocate call jar\n");
971 rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1);
972 if (!rxrpc_workqueue) {
973 pr_notice("Failed to allocate work queue\n");
974 goto error_work_queue;
977 ret = rxrpc_init_security();
979 pr_crit("Cannot initialise security\n");
983 ret = register_pernet_subsys(&rxrpc_net_ops);
987 ret = proto_register(&rxrpc_proto, 1);
989 pr_crit("Cannot register protocol\n");
993 ret = sock_register(&rxrpc_family_ops);
995 pr_crit("Cannot register socket family\n");
999 ret = register_key_type(&key_type_rxrpc);
1001 pr_crit("Cannot register client key type\n");
1002 goto error_key_type;
1005 ret = register_key_type(&key_type_rxrpc_s);
1007 pr_crit("Cannot register server key type\n");
1008 goto error_key_type_s;
1011 ret = rxrpc_sysctl_init();
1013 pr_crit("Cannot register sysctls\n");
1020 unregister_key_type(&key_type_rxrpc_s);
1022 unregister_key_type(&key_type_rxrpc);
1024 sock_unregister(PF_RXRPC);
1026 proto_unregister(&rxrpc_proto);
1028 unregister_pernet_subsys(&rxrpc_net_ops);
1030 rxrpc_exit_security();
1032 destroy_workqueue(rxrpc_workqueue);
1034 kmem_cache_destroy(rxrpc_call_jar);
1040 * unregister the RxRPC protocol
1042 static void __exit af_rxrpc_exit(void)
1045 rxrpc_sysctl_exit();
1046 unregister_key_type(&key_type_rxrpc_s);
1047 unregister_key_type(&key_type_rxrpc);
1048 sock_unregister(PF_RXRPC);
1049 proto_unregister(&rxrpc_proto);
1050 unregister_pernet_subsys(&rxrpc_net_ops);
1051 ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
1052 ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
1054 /* Make sure the local and peer records pinned by any dying connections
1058 rxrpc_destroy_client_conn_ids();
1060 destroy_workqueue(rxrpc_workqueue);
1061 rxrpc_exit_security();
1062 kmem_cache_destroy(rxrpc_call_jar);
1066 module_init(af_rxrpc_init);
1067 module_exit(af_rxrpc_exit);