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_tx_skbs, 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 if (srx->transport.family != rx->family &&
97 srx->transport.family == AF_INET && rx->family != AF_INET6)
100 switch (srx->transport.family) {
102 if (srx->transport_len < sizeof(struct sockaddr_in))
104 tail = offsetof(struct sockaddr_rxrpc, transport.sin.__pad);
107 #ifdef CONFIG_AF_RXRPC_IPV6
109 if (srx->transport_len < sizeof(struct sockaddr_in6))
111 tail = offsetof(struct sockaddr_rxrpc, transport) +
112 sizeof(struct sockaddr_in6);
117 return -EAFNOSUPPORT;
121 memset((void *)srx + tail, 0, len - tail);
122 _debug("INET: %pISp", &srx->transport);
127 * bind a local address to an RxRPC socket
129 static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
131 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;
132 struct rxrpc_local *local;
133 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
137 _enter("%p,%p,%d", rx, saddr, len);
139 ret = rxrpc_validate_address(rx, srx, len);
142 service_id = srx->srx_service;
146 switch (rx->sk.sk_state) {
149 local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx);
151 ret = PTR_ERR(local);
156 write_lock(&local->services_lock);
157 if (rcu_access_pointer(local->service))
160 rcu_assign_pointer(local->service, rx);
161 write_unlock(&local->services_lock);
163 rx->sk.sk_state = RXRPC_SERVER_BOUND;
166 rx->sk.sk_state = RXRPC_CLIENT_BOUND;
170 case RXRPC_SERVER_BOUND:
175 if (service_id == rx->srx.srx_service)
178 srx->srx_service = rx->srx.srx_service;
179 if (memcmp(srx, &rx->srx, sizeof(*srx)) != 0)
181 rx->second_service = service_id;
182 rx->sk.sk_state = RXRPC_SERVER_BOUND2;
190 release_sock(&rx->sk);
195 write_unlock(&local->services_lock);
196 rxrpc_unuse_local(local);
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
270 * @intr: The call is interruptible
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,
289 unsigned int debug_id)
291 struct rxrpc_conn_parameters cp;
292 struct rxrpc_call_params p;
293 struct rxrpc_call *call;
294 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
297 _enter(",,%x,%lx", key_serial(key), user_call_ID);
299 ret = rxrpc_validate_address(rx, srx, sizeof(*srx));
307 if (key && !key->payload.data[0])
308 key = NULL; /* a no-security key */
310 memset(&p, 0, sizeof(p));
311 p.user_call_ID = user_call_ID;
312 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, 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 * rxrpc_kernel_set_max_life - Set maximum lifespan on a call
448 * @sock: The socket the call is on
449 * @call: The call to configure
450 * @hard_timeout: The maximum lifespan of the call in jiffies
452 * Set the maximum lifespan of a call. The call will end with ETIME or
453 * ETIMEDOUT if it takes longer than this.
455 void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call,
456 unsigned long hard_timeout)
460 mutex_lock(&call->user_mutex);
464 WRITE_ONCE(call->expect_term_by, hard_timeout);
465 rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard);
467 mutex_unlock(&call->user_mutex);
469 EXPORT_SYMBOL(rxrpc_kernel_set_max_life);
472 * connect an RxRPC socket
473 * - this just targets it at a specific destination; no actual connection
474 * negotiation takes place
476 static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
477 int addr_len, int flags)
479 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr;
480 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
483 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
485 ret = rxrpc_validate_address(rx, srx, addr_len);
487 _leave(" = %d [bad addr]", ret);
494 if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags))
497 switch (rx->sk.sk_state) {
499 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
500 case RXRPC_CLIENT_UNBOUND:
501 case RXRPC_CLIENT_BOUND:
508 rx->connect_srx = *srx;
509 set_bit(RXRPC_SOCK_CONNECTED, &rx->flags);
513 release_sock(&rx->sk);
518 * send a message through an RxRPC socket
519 * - in a client this does a number of things:
520 * - finds/sets up a connection for the security specified (if any)
521 * - initiates a call (ID in control data)
522 * - ends the request phase of a call (if MSG_MORE is not set)
523 * - sends a call data packet
524 * - may send an abort (abort code in control data)
526 static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
528 struct rxrpc_local *local;
529 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
532 _enter(",{%d},,%zu", rx->sk.sk_state, len);
534 if (m->msg_flags & MSG_OOB)
538 ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
540 _leave(" = %d [bad addr]", ret);
547 switch (rx->sk.sk_state) {
549 case RXRPC_CLIENT_UNBOUND:
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_BOUND;
577 case RXRPC_CLIENT_BOUND:
579 test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) {
580 m->msg_name = &rx->connect_srx;
581 m->msg_namelen = sizeof(rx->connect_srx);
584 case RXRPC_SERVER_BOUND:
585 case RXRPC_SERVER_LISTENING:
586 ret = rxrpc_do_sendmsg(rx, m, len);
587 /* The socket has been unlocked */
595 release_sock(&rx->sk);
597 _leave(" = %d", ret);
602 * set RxRPC socket options
604 static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
605 char __user *optval, unsigned int optlen)
607 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
608 unsigned int min_sec_level;
609 u16 service_upgrade[2];
612 _enter(",%d,%d,,%d", level, optname, optlen);
617 if (level == SOL_RXRPC) {
619 case RXRPC_EXCLUSIVE_CONNECTION:
624 if (rx->sk.sk_state != RXRPC_UNBOUND)
626 rx->exclusive = true;
629 case RXRPC_SECURITY_KEY:
634 if (rx->sk.sk_state != RXRPC_UNBOUND)
636 ret = rxrpc_request_key(rx, optval, optlen);
639 case RXRPC_SECURITY_KEYRING:
644 if (rx->sk.sk_state != RXRPC_UNBOUND)
646 ret = rxrpc_server_keyring(rx, optval, optlen);
649 case RXRPC_MIN_SECURITY_LEVEL:
651 if (optlen != sizeof(unsigned int))
654 if (rx->sk.sk_state != RXRPC_UNBOUND)
656 ret = get_user(min_sec_level,
657 (unsigned int __user *) optval);
661 if (min_sec_level > RXRPC_SECURITY_MAX)
663 rx->min_sec_level = min_sec_level;
666 case RXRPC_UPGRADEABLE_SERVICE:
668 if (optlen != sizeof(service_upgrade) ||
669 rx->service_upgrade.from != 0)
672 if (rx->sk.sk_state != RXRPC_SERVER_BOUND2)
675 if (copy_from_user(service_upgrade, optval,
676 sizeof(service_upgrade)) != 0)
679 if ((service_upgrade[0] != rx->srx.srx_service ||
680 service_upgrade[1] != rx->second_service) &&
681 (service_upgrade[0] != rx->second_service ||
682 service_upgrade[1] != rx->srx.srx_service))
684 rx->service_upgrade.from = service_upgrade[0];
685 rx->service_upgrade.to = service_upgrade[1];
696 release_sock(&rx->sk);
701 * Get socket options.
703 static int rxrpc_getsockopt(struct socket *sock, int level, int optname,
704 char __user *optval, int __user *_optlen)
708 if (level != SOL_RXRPC)
711 if (get_user(optlen, _optlen))
715 case RXRPC_SUPPORTED_CMSG:
716 if (optlen < sizeof(int))
718 if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) ||
719 put_user(sizeof(int), _optlen))
729 * permit an RxRPC socket to be polled
731 static __poll_t rxrpc_poll(struct file *file, struct socket *sock,
734 struct sock *sk = sock->sk;
735 struct rxrpc_sock *rx = rxrpc_sk(sk);
738 sock_poll_wait(file, sock, wait);
741 /* the socket is readable if there are any messages waiting on the Rx
743 if (!list_empty(&rx->recvmsg_q))
744 mask |= EPOLLIN | EPOLLRDNORM;
746 /* the socket is writable if there is space to add new data to the
747 * socket; there is no guarantee that any particular call in progress
748 * on the socket may have space in the Tx ACK window */
749 if (rxrpc_writable(sk))
750 mask |= EPOLLOUT | EPOLLWRNORM;
756 * create an RxRPC socket
758 static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
761 struct rxrpc_net *rxnet;
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 rxnet = rxrpc_net(sock_net(&rx->sk));
802 timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1);
804 _leave(" = 0 [%p]", rx);
809 * Kill all the calls on a socket and shut it down.
811 static int rxrpc_shutdown(struct socket *sock, int flags)
813 struct sock *sk = sock->sk;
814 struct rxrpc_sock *rx = rxrpc_sk(sk);
817 _enter("%p,%d", sk, flags);
819 if (flags != SHUT_RDWR)
821 if (sk->sk_state == RXRPC_CLOSE)
826 spin_lock_bh(&sk->sk_receive_queue.lock);
827 if (sk->sk_state < RXRPC_CLOSE) {
828 sk->sk_state = RXRPC_CLOSE;
829 sk->sk_shutdown = SHUTDOWN_MASK;
833 spin_unlock_bh(&sk->sk_receive_queue.lock);
835 rxrpc_discard_prealloc(rx);
842 * RxRPC socket destructor
844 static void rxrpc_sock_destructor(struct sock *sk)
848 rxrpc_purge_queue(&sk->sk_receive_queue);
850 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
851 WARN_ON(!sk_unhashed(sk));
852 WARN_ON(sk->sk_socket);
854 if (!sock_flag(sk, SOCK_DEAD)) {
855 printk("Attempt to release alive rxrpc socket: %p\n", sk);
861 * release an RxRPC socket
863 static int rxrpc_release_sock(struct sock *sk)
865 struct rxrpc_sock *rx = rxrpc_sk(sk);
867 _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
869 /* declare the socket closed for business */
871 sk->sk_shutdown = SHUTDOWN_MASK;
873 /* We want to kill off all connections from a service socket
874 * as fast as possible because we can't share these; client
875 * sockets, on the other hand, can share an endpoint.
877 switch (sk->sk_state) {
878 case RXRPC_SERVER_BOUND:
879 case RXRPC_SERVER_BOUND2:
880 case RXRPC_SERVER_LISTENING:
881 case RXRPC_SERVER_LISTEN_DISABLED:
882 rx->local->service_closed = true;
886 spin_lock_bh(&sk->sk_receive_queue.lock);
887 sk->sk_state = RXRPC_CLOSE;
888 spin_unlock_bh(&sk->sk_receive_queue.lock);
890 if (rx->local && rcu_access_pointer(rx->local->service) == rx) {
891 write_lock(&rx->local->services_lock);
892 rcu_assign_pointer(rx->local->service, NULL);
893 write_unlock(&rx->local->services_lock);
896 /* try to flush out this socket */
897 rxrpc_discard_prealloc(rx);
898 rxrpc_release_calls_on_socket(rx);
899 flush_workqueue(rxrpc_workqueue);
900 rxrpc_purge_queue(&sk->sk_receive_queue);
902 rxrpc_unuse_local(rx->local);
903 rxrpc_put_local(rx->local);
907 key_put(rx->securities);
908 rx->securities = NULL;
916 * release an RxRPC BSD socket on close() or equivalent
918 static int rxrpc_release(struct socket *sock)
920 struct sock *sk = sock->sk;
922 _enter("%p{%p}", sock, sk);
929 return rxrpc_release_sock(sk);
933 * RxRPC network protocol
935 static const struct proto_ops rxrpc_rpc_ops = {
937 .owner = THIS_MODULE,
938 .release = rxrpc_release,
940 .connect = rxrpc_connect,
941 .socketpair = sock_no_socketpair,
942 .accept = sock_no_accept,
943 .getname = sock_no_getname,
945 .ioctl = sock_no_ioctl,
946 .listen = rxrpc_listen,
947 .shutdown = rxrpc_shutdown,
948 .setsockopt = rxrpc_setsockopt,
949 .getsockopt = rxrpc_getsockopt,
950 .sendmsg = rxrpc_sendmsg,
951 .recvmsg = rxrpc_recvmsg,
952 .mmap = sock_no_mmap,
953 .sendpage = sock_no_sendpage,
956 static struct proto rxrpc_proto = {
958 .owner = THIS_MODULE,
959 .obj_size = sizeof(struct rxrpc_sock),
960 .max_header = sizeof(struct rxrpc_wire_header),
963 static const struct net_proto_family rxrpc_family_ops = {
965 .create = rxrpc_create,
966 .owner = THIS_MODULE,
970 * initialise and register the RxRPC protocol
972 static int __init af_rxrpc_init(void)
977 BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof_field(struct sk_buff, cb));
979 get_random_bytes(&tmp, sizeof(tmp));
983 idr_set_cursor(&rxrpc_client_conn_ids, tmp);
986 rxrpc_call_jar = kmem_cache_create(
987 "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
988 SLAB_HWCACHE_ALIGN, NULL);
989 if (!rxrpc_call_jar) {
990 pr_notice("Failed to allocate call jar\n");
994 rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1);
995 if (!rxrpc_workqueue) {
996 pr_notice("Failed to allocate work queue\n");
997 goto error_work_queue;
1000 ret = rxrpc_init_security();
1002 pr_crit("Cannot initialise security\n");
1003 goto error_security;
1006 ret = register_pernet_subsys(&rxrpc_net_ops);
1010 ret = proto_register(&rxrpc_proto, 1);
1012 pr_crit("Cannot register protocol\n");
1016 ret = sock_register(&rxrpc_family_ops);
1018 pr_crit("Cannot register socket family\n");
1022 ret = register_key_type(&key_type_rxrpc);
1024 pr_crit("Cannot register client key type\n");
1025 goto error_key_type;
1028 ret = register_key_type(&key_type_rxrpc_s);
1030 pr_crit("Cannot register server key type\n");
1031 goto error_key_type_s;
1034 ret = rxrpc_sysctl_init();
1036 pr_crit("Cannot register sysctls\n");
1043 unregister_key_type(&key_type_rxrpc_s);
1045 unregister_key_type(&key_type_rxrpc);
1047 sock_unregister(PF_RXRPC);
1049 proto_unregister(&rxrpc_proto);
1051 unregister_pernet_subsys(&rxrpc_net_ops);
1053 rxrpc_exit_security();
1055 destroy_workqueue(rxrpc_workqueue);
1057 kmem_cache_destroy(rxrpc_call_jar);
1063 * unregister the RxRPC protocol
1065 static void __exit af_rxrpc_exit(void)
1068 rxrpc_sysctl_exit();
1069 unregister_key_type(&key_type_rxrpc_s);
1070 unregister_key_type(&key_type_rxrpc);
1071 sock_unregister(PF_RXRPC);
1072 proto_unregister(&rxrpc_proto);
1073 unregister_pernet_subsys(&rxrpc_net_ops);
1074 ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
1075 ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
1077 /* Make sure the local and peer records pinned by any dying connections
1081 rxrpc_destroy_client_conn_ids();
1083 destroy_workqueue(rxrpc_workqueue);
1084 rxrpc_exit_security();
1085 kmem_cache_destroy(rxrpc_call_jar);
1089 module_init(af_rxrpc_init);
1090 module_exit(af_rxrpc_exit);