1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* AF_RXRPC implementation
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/net.h>
13 #include <linux/slab.h>
14 #include <linux/skbuff.h>
15 #include <linux/random.h>
16 #include <linux/poll.h>
17 #include <linux/proc_fs.h>
18 #include <linux/key-type.h>
19 #include <net/net_namespace.h>
21 #include <net/af_rxrpc.h>
22 #define CREATE_TRACE_POINTS
23 #include "ar-internal.h"
25 MODULE_DESCRIPTION("RxRPC network protocol");
26 MODULE_AUTHOR("Red Hat, Inc.");
27 MODULE_LICENSE("GPL");
28 MODULE_ALIAS_NETPROTO(PF_RXRPC);
30 unsigned int rxrpc_debug; // = RXRPC_DEBUG_KPROTO;
31 module_param_named(debug, rxrpc_debug, uint, 0644);
32 MODULE_PARM_DESC(debug, "RxRPC debugging mask");
34 static struct proto rxrpc_proto;
35 static const struct proto_ops rxrpc_rpc_ops;
37 /* current debugging ID */
38 atomic_t rxrpc_debug_id;
39 EXPORT_SYMBOL(rxrpc_debug_id);
41 /* count of skbs currently in use */
42 atomic_t rxrpc_n_rx_skbs;
44 struct workqueue_struct *rxrpc_workqueue;
46 static void rxrpc_sock_destructor(struct sock *);
49 * see if an RxRPC socket is currently writable
51 static inline int rxrpc_writable(struct sock *sk)
53 return refcount_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf;
57 * wait for write bufferage to become available
59 static void rxrpc_write_space(struct sock *sk)
63 if (rxrpc_writable(sk)) {
64 struct socket_wq *wq = rcu_dereference(sk->sk_wq);
66 if (skwq_has_sleeper(wq))
67 wake_up_interruptible(&wq->wait);
68 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
74 * validate an RxRPC address
76 static int rxrpc_validate_address(struct rxrpc_sock *rx,
77 struct sockaddr_rxrpc *srx,
82 if (len < sizeof(struct sockaddr_rxrpc))
85 if (srx->srx_family != AF_RXRPC)
88 if (srx->transport_type != SOCK_DGRAM)
89 return -ESOCKTNOSUPPORT;
91 len -= offsetof(struct sockaddr_rxrpc, transport);
92 if (srx->transport_len < sizeof(sa_family_t) ||
93 srx->transport_len > len)
96 switch (srx->transport.family) {
98 if (rx->family != AF_INET &&
99 rx->family != AF_INET6)
100 return -EAFNOSUPPORT;
101 if (srx->transport_len < sizeof(struct sockaddr_in))
103 tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad);
106 #ifdef CONFIG_AF_RXRPC_IPV6
108 if (rx->family != AF_INET6)
109 return -EAFNOSUPPORT;
110 if (srx->transport_len < sizeof(struct sockaddr_in6))
112 tail = offsetof(struct sockaddr_rxrpc, transport) +
113 sizeof(struct sockaddr_in6);
118 return -EAFNOSUPPORT;
122 memset((void *)srx + tail, 0, len - tail);
123 _debug("INET: %pISp", &srx->transport);
128 * bind a local address to an RxRPC socket
130 static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
132 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;
133 struct rxrpc_local *local;
134 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
138 _enter("%p,%p,%d", rx, saddr, len);
140 ret = rxrpc_validate_address(rx, srx, len);
143 service_id = srx->srx_service;
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);
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_unuse_local(local, rxrpc_local_unuse_bind);
198 rxrpc_put_local(local, rxrpc_local_put_bind);
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 * @interruptibility: The call is interruptible, or can be canceled.
272 * @debug_id: The debug ID for tracing to be assigned to the call
274 * Allow a kernel service to begin a call on the nominated socket. This just
275 * sets up all the internal tracking structures and allocates connection and
276 * call IDs as appropriate. The call to be used is returned.
278 * The default socket destination address and security may be overridden by
279 * supplying @srx and @key.
281 struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
282 struct sockaddr_rxrpc *srx,
284 unsigned long user_call_ID,
287 rxrpc_notify_rx_t notify_rx,
289 enum rxrpc_interruptibility interruptibility,
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;
314 p.interruptibility = interruptibility;
317 memset(&cp, 0, sizeof(cp));
318 cp.local = rx->local;
320 cp.security_level = rx->min_sec_level;
321 cp.exclusive = false;
322 cp.upgrade = upgrade;
323 cp.service_id = srx->srx_service;
324 call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id);
325 /* The socket has been unlocked. */
327 call->notify_rx = notify_rx;
328 mutex_unlock(&call->user_mutex);
331 _leave(" = %p", call);
334 EXPORT_SYMBOL(rxrpc_kernel_begin_call);
337 * Dummy function used to stop the notifier talking to recvmsg().
339 static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall,
340 unsigned long call_user_ID)
345 * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
346 * @sock: The socket the call is on
347 * @call: The call to end
349 * Allow a kernel service to end a call it was using. The call must be
350 * complete before this is called (the call should be aborted if necessary).
352 void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call)
354 _enter("%d{%d}", call->debug_id, refcount_read(&call->ref));
356 mutex_lock(&call->user_mutex);
357 rxrpc_release_call(rxrpc_sk(sock->sk), call);
359 /* Make sure we're not going to call back into a kernel service */
360 if (call->notify_rx) {
361 spin_lock(&call->notify_lock);
362 call->notify_rx = rxrpc_dummy_notify_rx;
363 spin_unlock(&call->notify_lock);
366 mutex_unlock(&call->user_mutex);
367 rxrpc_put_call(call, rxrpc_call_put_kernel);
369 EXPORT_SYMBOL(rxrpc_kernel_end_call);
372 * rxrpc_kernel_check_life - Check to see whether a call is still alive
373 * @sock: The socket the call is on
374 * @call: The call to check
376 * Allow a kernel service to find out whether a call is still alive - whether
377 * it has completed successfully and all received data has been consumed.
379 bool rxrpc_kernel_check_life(const struct socket *sock,
380 const struct rxrpc_call *call)
382 if (!rxrpc_call_is_complete(call))
384 if (call->completion != RXRPC_CALL_SUCCEEDED)
386 return !skb_queue_empty(&call->recvmsg_queue);
388 EXPORT_SYMBOL(rxrpc_kernel_check_life);
391 * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call.
392 * @sock: The socket the call is on
393 * @call: The call to query
395 * Allow a kernel service to retrieve the epoch value from a service call to
396 * see if the client at the other end rebooted.
398 u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call)
400 return call->conn->proto.epoch;
402 EXPORT_SYMBOL(rxrpc_kernel_get_epoch);
405 * rxrpc_kernel_new_call_notification - Get notifications of new calls
406 * @sock: The socket to intercept received messages on
407 * @notify_new_call: Function to be called when new calls appear
408 * @discard_new_call: Function to discard preallocated calls
410 * Allow a kernel service to be given notifications about new calls.
412 void rxrpc_kernel_new_call_notification(
414 rxrpc_notify_new_call_t notify_new_call,
415 rxrpc_discard_new_call_t discard_new_call)
417 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
419 rx->notify_new_call = notify_new_call;
420 rx->discard_new_call = discard_new_call;
422 EXPORT_SYMBOL(rxrpc_kernel_new_call_notification);
425 * rxrpc_kernel_set_max_life - Set maximum lifespan on a call
426 * @sock: The socket the call is on
427 * @call: The call to configure
428 * @hard_timeout: The maximum lifespan of the call in jiffies
430 * Set the maximum lifespan of a call. The call will end with ETIME or
431 * ETIMEDOUT if it takes longer than this.
433 void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call,
434 unsigned long hard_timeout)
438 mutex_lock(&call->user_mutex);
442 WRITE_ONCE(call->expect_term_by, hard_timeout);
443 rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard);
445 mutex_unlock(&call->user_mutex);
447 EXPORT_SYMBOL(rxrpc_kernel_set_max_life);
450 * connect an RxRPC socket
451 * - this just targets it at a specific destination; no actual connection
452 * negotiation takes place
454 static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
455 int addr_len, int flags)
457 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr;
458 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
461 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
463 ret = rxrpc_validate_address(rx, srx, addr_len);
465 _leave(" = %d [bad addr]", ret);
472 if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags))
475 switch (rx->sk.sk_state) {
477 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
479 case RXRPC_CLIENT_UNBOUND:
480 case RXRPC_CLIENT_BOUND:
487 rx->connect_srx = *srx;
488 set_bit(RXRPC_SOCK_CONNECTED, &rx->flags);
492 release_sock(&rx->sk);
497 * send a message through an RxRPC socket
498 * - in a client this does a number of things:
499 * - finds/sets up a connection for the security specified (if any)
500 * - initiates a call (ID in control data)
501 * - ends the request phase of a call (if MSG_MORE is not set)
502 * - sends a call data packet
503 * - may send an abort (abort code in control data)
505 static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
507 struct rxrpc_local *local;
508 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
511 _enter(",{%d},,%zu", rx->sk.sk_state, len);
513 if (m->msg_flags & MSG_OOB)
517 ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
519 _leave(" = %d [bad addr]", ret);
526 switch (rx->sk.sk_state) {
528 case RXRPC_CLIENT_UNBOUND:
529 rx->srx.srx_family = AF_RXRPC;
530 rx->srx.srx_service = 0;
531 rx->srx.transport_type = SOCK_DGRAM;
532 rx->srx.transport.family = rx->family;
533 switch (rx->family) {
535 rx->srx.transport_len = sizeof(struct sockaddr_in);
537 #ifdef CONFIG_AF_RXRPC_IPV6
539 rx->srx.transport_len = sizeof(struct sockaddr_in6);
546 local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);
548 ret = PTR_ERR(local);
553 rx->sk.sk_state = RXRPC_CLIENT_BOUND;
556 case RXRPC_CLIENT_BOUND:
558 test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) {
559 m->msg_name = &rx->connect_srx;
560 m->msg_namelen = sizeof(rx->connect_srx);
563 case RXRPC_SERVER_BOUND:
564 case RXRPC_SERVER_LISTENING:
565 ret = rxrpc_do_sendmsg(rx, m, len);
566 /* The socket has been unlocked */
574 release_sock(&rx->sk);
576 _leave(" = %d", ret);
580 int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val)
582 if (sk->sk_state != RXRPC_UNBOUND)
584 if (val > RXRPC_SECURITY_MAX)
587 rxrpc_sk(sk)->min_sec_level = val;
591 EXPORT_SYMBOL(rxrpc_sock_set_min_security_level);
594 * set RxRPC socket options
596 static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
597 sockptr_t optval, unsigned int optlen)
599 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
600 unsigned int min_sec_level;
601 u16 service_upgrade[2];
604 _enter(",%d,%d,,%d", level, optname, optlen);
609 if (level == SOL_RXRPC) {
611 case RXRPC_EXCLUSIVE_CONNECTION:
616 if (rx->sk.sk_state != RXRPC_UNBOUND)
618 rx->exclusive = true;
621 case RXRPC_SECURITY_KEY:
626 if (rx->sk.sk_state != RXRPC_UNBOUND)
628 ret = rxrpc_request_key(rx, optval, optlen);
631 case RXRPC_SECURITY_KEYRING:
636 if (rx->sk.sk_state != RXRPC_UNBOUND)
638 ret = rxrpc_server_keyring(rx, optval, optlen);
641 case RXRPC_MIN_SECURITY_LEVEL:
643 if (optlen != sizeof(unsigned int))
646 if (rx->sk.sk_state != RXRPC_UNBOUND)
648 ret = copy_from_sockptr(&min_sec_level, optval,
649 sizeof(unsigned int));
653 if (min_sec_level > RXRPC_SECURITY_MAX)
655 rx->min_sec_level = min_sec_level;
658 case RXRPC_UPGRADEABLE_SERVICE:
660 if (optlen != sizeof(service_upgrade) ||
661 rx->service_upgrade.from != 0)
664 if (rx->sk.sk_state != RXRPC_SERVER_BOUND2)
667 if (copy_from_sockptr(service_upgrade, optval,
668 sizeof(service_upgrade)) != 0)
671 if ((service_upgrade[0] != rx->srx.srx_service ||
672 service_upgrade[1] != rx->second_service) &&
673 (service_upgrade[0] != rx->second_service ||
674 service_upgrade[1] != rx->srx.srx_service))
676 rx->service_upgrade.from = service_upgrade[0];
677 rx->service_upgrade.to = service_upgrade[1];
688 release_sock(&rx->sk);
693 * Get socket options.
695 static int rxrpc_getsockopt(struct socket *sock, int level, int optname,
696 char __user *optval, int __user *_optlen)
700 if (level != SOL_RXRPC)
703 if (get_user(optlen, _optlen))
707 case RXRPC_SUPPORTED_CMSG:
708 if (optlen < sizeof(int))
710 if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) ||
711 put_user(sizeof(int), _optlen))
721 * permit an RxRPC socket to be polled
723 static __poll_t rxrpc_poll(struct file *file, struct socket *sock,
726 struct sock *sk = sock->sk;
727 struct rxrpc_sock *rx = rxrpc_sk(sk);
730 sock_poll_wait(file, sock, wait);
733 /* the socket is readable if there are any messages waiting on the Rx
735 if (!list_empty(&rx->recvmsg_q))
736 mask |= EPOLLIN | EPOLLRDNORM;
738 /* the socket is writable if there is space to add new data to the
739 * socket; there is no guarantee that any particular call in progress
740 * on the socket may have space in the Tx ACK window */
741 if (rxrpc_writable(sk))
742 mask |= EPOLLOUT | EPOLLWRNORM;
748 * create an RxRPC socket
750 static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
753 struct rxrpc_net *rxnet;
754 struct rxrpc_sock *rx;
757 _enter("%p,%d", sock, protocol);
759 /* we support transport protocol UDP/UDP6 only */
760 if (protocol != PF_INET &&
761 IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6)
762 return -EPROTONOSUPPORT;
764 if (sock->type != SOCK_DGRAM)
765 return -ESOCKTNOSUPPORT;
767 sock->ops = &rxrpc_rpc_ops;
768 sock->state = SS_UNCONNECTED;
770 sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern);
774 sock_init_data(sock, sk);
775 sock_set_flag(sk, SOCK_RCU_FREE);
776 sk->sk_state = RXRPC_UNBOUND;
777 sk->sk_write_space = rxrpc_write_space;
778 sk->sk_max_ack_backlog = 0;
779 sk->sk_destruct = rxrpc_sock_destructor;
782 rx->family = protocol;
785 spin_lock_init(&rx->incoming_lock);
786 INIT_LIST_HEAD(&rx->sock_calls);
787 INIT_LIST_HEAD(&rx->to_be_accepted);
788 INIT_LIST_HEAD(&rx->recvmsg_q);
789 rwlock_init(&rx->recvmsg_lock);
790 rwlock_init(&rx->call_lock);
791 memset(&rx->srx, 0, sizeof(rx->srx));
793 rxnet = rxrpc_net(sock_net(&rx->sk));
794 timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1);
796 _leave(" = 0 [%p]", rx);
801 * Kill all the calls on a socket and shut it down.
803 static int rxrpc_shutdown(struct socket *sock, int flags)
805 struct sock *sk = sock->sk;
806 struct rxrpc_sock *rx = rxrpc_sk(sk);
809 _enter("%p,%d", sk, flags);
811 if (flags != SHUT_RDWR)
813 if (sk->sk_state == RXRPC_CLOSE)
818 if (sk->sk_state < RXRPC_CLOSE) {
819 sk->sk_state = RXRPC_CLOSE;
820 sk->sk_shutdown = SHUTDOWN_MASK;
825 rxrpc_discard_prealloc(rx);
832 * RxRPC socket destructor
834 static void rxrpc_sock_destructor(struct sock *sk)
838 rxrpc_purge_queue(&sk->sk_receive_queue);
840 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
841 WARN_ON(!sk_unhashed(sk));
842 WARN_ON(sk->sk_socket);
844 if (!sock_flag(sk, SOCK_DEAD)) {
845 printk("Attempt to release alive rxrpc socket: %p\n", sk);
851 * release an RxRPC socket
853 static int rxrpc_release_sock(struct sock *sk)
855 struct rxrpc_sock *rx = rxrpc_sk(sk);
857 _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
859 /* declare the socket closed for business */
861 sk->sk_shutdown = SHUTDOWN_MASK;
863 /* We want to kill off all connections from a service socket
864 * as fast as possible because we can't share these; client
865 * sockets, on the other hand, can share an endpoint.
867 switch (sk->sk_state) {
868 case RXRPC_SERVER_BOUND:
869 case RXRPC_SERVER_BOUND2:
870 case RXRPC_SERVER_LISTENING:
871 case RXRPC_SERVER_LISTEN_DISABLED:
872 rx->local->service_closed = true;
876 sk->sk_state = RXRPC_CLOSE;
878 if (rx->local && rx->local->service == rx) {
879 write_lock(&rx->local->services_lock);
880 rx->local->service = NULL;
881 write_unlock(&rx->local->services_lock);
884 /* try to flush out this socket */
885 rxrpc_discard_prealloc(rx);
886 rxrpc_release_calls_on_socket(rx);
887 flush_workqueue(rxrpc_workqueue);
888 rxrpc_purge_queue(&sk->sk_receive_queue);
890 rxrpc_unuse_local(rx->local, rxrpc_local_unuse_release_sock);
891 rxrpc_put_local(rx->local, rxrpc_local_put_release_sock);
895 key_put(rx->securities);
896 rx->securities = NULL;
904 * release an RxRPC BSD socket on close() or equivalent
906 static int rxrpc_release(struct socket *sock)
908 struct sock *sk = sock->sk;
910 _enter("%p{%p}", sock, sk);
917 return rxrpc_release_sock(sk);
921 * RxRPC network protocol
923 static const struct proto_ops rxrpc_rpc_ops = {
925 .owner = THIS_MODULE,
926 .release = rxrpc_release,
928 .connect = rxrpc_connect,
929 .socketpair = sock_no_socketpair,
930 .accept = sock_no_accept,
931 .getname = sock_no_getname,
933 .ioctl = sock_no_ioctl,
934 .listen = rxrpc_listen,
935 .shutdown = rxrpc_shutdown,
936 .setsockopt = rxrpc_setsockopt,
937 .getsockopt = rxrpc_getsockopt,
938 .sendmsg = rxrpc_sendmsg,
939 .recvmsg = rxrpc_recvmsg,
940 .mmap = sock_no_mmap,
941 .sendpage = sock_no_sendpage,
944 static struct proto rxrpc_proto = {
946 .owner = THIS_MODULE,
947 .obj_size = sizeof(struct rxrpc_sock),
948 .max_header = sizeof(struct rxrpc_wire_header),
951 static const struct net_proto_family rxrpc_family_ops = {
953 .create = rxrpc_create,
954 .owner = THIS_MODULE,
958 * initialise and register the RxRPC protocol
960 static int __init af_rxrpc_init(void)
964 BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof_field(struct sk_buff, cb));
967 rxrpc_call_jar = kmem_cache_create(
968 "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
969 SLAB_HWCACHE_ALIGN, NULL);
970 if (!rxrpc_call_jar) {
971 pr_notice("Failed to allocate call jar\n");
975 rxrpc_workqueue = alloc_workqueue("krxrpcd", WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
976 if (!rxrpc_workqueue) {
977 pr_notice("Failed to allocate work queue\n");
978 goto error_work_queue;
981 ret = rxrpc_init_security();
983 pr_crit("Cannot initialise security\n");
987 ret = register_pernet_device(&rxrpc_net_ops);
991 ret = proto_register(&rxrpc_proto, 1);
993 pr_crit("Cannot register protocol\n");
997 ret = sock_register(&rxrpc_family_ops);
999 pr_crit("Cannot register socket family\n");
1003 ret = register_key_type(&key_type_rxrpc);
1005 pr_crit("Cannot register client key type\n");
1006 goto error_key_type;
1009 ret = register_key_type(&key_type_rxrpc_s);
1011 pr_crit("Cannot register server key type\n");
1012 goto error_key_type_s;
1015 ret = rxrpc_sysctl_init();
1017 pr_crit("Cannot register sysctls\n");
1024 unregister_key_type(&key_type_rxrpc_s);
1026 unregister_key_type(&key_type_rxrpc);
1028 sock_unregister(PF_RXRPC);
1030 proto_unregister(&rxrpc_proto);
1032 unregister_pernet_device(&rxrpc_net_ops);
1034 rxrpc_exit_security();
1036 destroy_workqueue(rxrpc_workqueue);
1038 kmem_cache_destroy(rxrpc_call_jar);
1044 * unregister the RxRPC protocol
1046 static void __exit af_rxrpc_exit(void)
1049 rxrpc_sysctl_exit();
1050 unregister_key_type(&key_type_rxrpc_s);
1051 unregister_key_type(&key_type_rxrpc);
1052 sock_unregister(PF_RXRPC);
1053 proto_unregister(&rxrpc_proto);
1054 unregister_pernet_device(&rxrpc_net_ops);
1055 ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
1057 /* Make sure the local and peer records pinned by any dying connections
1062 destroy_workqueue(rxrpc_workqueue);
1063 rxrpc_exit_security();
1064 kmem_cache_destroy(rxrpc_call_jar);
1068 module_init(af_rxrpc_init);
1069 module_exit(af_rxrpc_exit);