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 * @intr: The call is interruptible
274 * @debug_id: The debug ID for tracing to be assigned to the call
276 * Allow a kernel service to begin a call on the nominated socket. This just
277 * sets up all the internal tracking structures and allocates connection and
278 * call IDs as appropriate. The call to be used is returned.
280 * The default socket destination address and security may be overridden by
281 * supplying @srx and @key.
283 struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
284 struct sockaddr_rxrpc *srx,
286 unsigned long user_call_ID,
289 rxrpc_notify_rx_t notify_rx,
292 unsigned int debug_id)
294 struct rxrpc_conn_parameters cp;
295 struct rxrpc_call_params p;
296 struct rxrpc_call *call;
297 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
300 _enter(",,%x,%lx", key_serial(key), user_call_ID);
302 ret = rxrpc_validate_address(rx, srx, sizeof(*srx));
310 if (key && !key->payload.data[0])
311 key = NULL; /* a no-security key */
313 memset(&p, 0, sizeof(p));
314 p.user_call_ID = user_call_ID;
315 p.tx_total_len = tx_total_len;
318 memset(&cp, 0, sizeof(cp));
319 cp.local = rx->local;
321 cp.security_level = rx->min_sec_level;
322 cp.exclusive = false;
323 cp.upgrade = upgrade;
324 cp.service_id = srx->srx_service;
325 call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id);
326 /* The socket has been unlocked. */
328 call->notify_rx = notify_rx;
329 mutex_unlock(&call->user_mutex);
332 rxrpc_put_peer(cp.peer);
333 _leave(" = %p", call);
336 EXPORT_SYMBOL(rxrpc_kernel_begin_call);
339 * Dummy function used to stop the notifier talking to recvmsg().
341 static void rxrpc_dummy_notify_rx(struct sock *sk, struct rxrpc_call *rxcall,
342 unsigned long call_user_ID)
347 * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
348 * @sock: The socket the call is on
349 * @call: The call to end
351 * Allow a kernel service to end a call it was using. The call must be
352 * complete before this is called (the call should be aborted if necessary).
354 void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call)
356 _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
358 mutex_lock(&call->user_mutex);
359 rxrpc_release_call(rxrpc_sk(sock->sk), call);
361 /* Make sure we're not going to call back into a kernel service */
362 if (call->notify_rx) {
363 spin_lock_bh(&call->notify_lock);
364 call->notify_rx = rxrpc_dummy_notify_rx;
365 spin_unlock_bh(&call->notify_lock);
368 mutex_unlock(&call->user_mutex);
369 rxrpc_put_call(call, rxrpc_call_put_kernel);
371 EXPORT_SYMBOL(rxrpc_kernel_end_call);
374 * rxrpc_kernel_check_life - Check to see whether a call is still alive
375 * @sock: The socket the call is on
376 * @call: The call to check
377 * @_life: Where to store the life value
379 * Allow a kernel service to find out whether a call is still alive - ie. we're
380 * getting ACKs from the server. Passes back in *_life a number representing
381 * the life state which can be compared to that returned by a previous call and
382 * return true if the call is still alive.
384 * If the life state stalls, rxrpc_kernel_probe_life() should be called and
387 bool rxrpc_kernel_check_life(const struct socket *sock,
388 const struct rxrpc_call *call,
391 *_life = call->acks_latest;
392 return call->state != RXRPC_CALL_COMPLETE;
394 EXPORT_SYMBOL(rxrpc_kernel_check_life);
397 * rxrpc_kernel_probe_life - Poke the peer to see if it's still alive
398 * @sock: The socket the call is on
399 * @call: The call to check
401 * In conjunction with rxrpc_kernel_check_life(), allow a kernel service to
402 * find out whether a call is still alive by pinging it. This should cause the
403 * life state to be bumped in about 2*RTT.
405 * The must be called in TASK_RUNNING state on pain of might_sleep() objecting.
407 void rxrpc_kernel_probe_life(struct socket *sock, struct rxrpc_call *call)
409 rxrpc_propose_ACK(call, RXRPC_ACK_PING, 0, 0, true, false,
410 rxrpc_propose_ack_ping_for_check_life);
411 rxrpc_send_ack_packet(call, true, NULL);
413 EXPORT_SYMBOL(rxrpc_kernel_probe_life);
416 * rxrpc_kernel_get_epoch - Retrieve the epoch value from a call.
417 * @sock: The socket the call is on
418 * @call: The call to query
420 * Allow a kernel service to retrieve the epoch value from a service call to
421 * see if the client at the other end rebooted.
423 u32 rxrpc_kernel_get_epoch(struct socket *sock, struct rxrpc_call *call)
425 return call->conn->proto.epoch;
427 EXPORT_SYMBOL(rxrpc_kernel_get_epoch);
430 * rxrpc_kernel_new_call_notification - Get notifications of new calls
431 * @sock: The socket to intercept received messages on
432 * @notify_new_call: Function to be called when new calls appear
433 * @discard_new_call: Function to discard preallocated calls
435 * Allow a kernel service to be given notifications about new calls.
437 void rxrpc_kernel_new_call_notification(
439 rxrpc_notify_new_call_t notify_new_call,
440 rxrpc_discard_new_call_t discard_new_call)
442 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
444 rx->notify_new_call = notify_new_call;
445 rx->discard_new_call = discard_new_call;
447 EXPORT_SYMBOL(rxrpc_kernel_new_call_notification);
450 * rxrpc_kernel_set_max_life - Set maximum lifespan on a call
451 * @sock: The socket the call is on
452 * @call: The call to configure
453 * @hard_timeout: The maximum lifespan of the call in jiffies
455 * Set the maximum lifespan of a call. The call will end with ETIME or
456 * ETIMEDOUT if it takes longer than this.
458 void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call,
459 unsigned long hard_timeout)
463 mutex_lock(&call->user_mutex);
467 WRITE_ONCE(call->expect_term_by, hard_timeout);
468 rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard);
470 mutex_unlock(&call->user_mutex);
472 EXPORT_SYMBOL(rxrpc_kernel_set_max_life);
475 * connect an RxRPC socket
476 * - this just targets it at a specific destination; no actual connection
477 * negotiation takes place
479 static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
480 int addr_len, int flags)
482 struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)addr;
483 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
486 _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
488 ret = rxrpc_validate_address(rx, srx, addr_len);
490 _leave(" = %d [bad addr]", ret);
497 if (test_bit(RXRPC_SOCK_CONNECTED, &rx->flags))
500 switch (rx->sk.sk_state) {
502 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
503 case RXRPC_CLIENT_UNBOUND:
504 case RXRPC_CLIENT_BOUND:
511 rx->connect_srx = *srx;
512 set_bit(RXRPC_SOCK_CONNECTED, &rx->flags);
516 release_sock(&rx->sk);
521 * send a message through an RxRPC socket
522 * - in a client this does a number of things:
523 * - finds/sets up a connection for the security specified (if any)
524 * - initiates a call (ID in control data)
525 * - ends the request phase of a call (if MSG_MORE is not set)
526 * - sends a call data packet
527 * - may send an abort (abort code in control data)
529 static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
531 struct rxrpc_local *local;
532 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
535 _enter(",{%d},,%zu", rx->sk.sk_state, len);
537 if (m->msg_flags & MSG_OOB)
541 ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
543 _leave(" = %d [bad addr]", ret);
550 switch (rx->sk.sk_state) {
552 rx->srx.srx_family = AF_RXRPC;
553 rx->srx.srx_service = 0;
554 rx->srx.transport_type = SOCK_DGRAM;
555 rx->srx.transport.family = rx->family;
556 switch (rx->family) {
558 rx->srx.transport_len = sizeof(struct sockaddr_in);
560 #ifdef CONFIG_AF_RXRPC_IPV6
562 rx->srx.transport_len = sizeof(struct sockaddr_in6);
569 local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);
571 ret = PTR_ERR(local);
576 rx->sk.sk_state = RXRPC_CLIENT_UNBOUND;
579 case RXRPC_CLIENT_UNBOUND:
580 case RXRPC_CLIENT_BOUND:
582 test_bit(RXRPC_SOCK_CONNECTED, &rx->flags)) {
583 m->msg_name = &rx->connect_srx;
584 m->msg_namelen = sizeof(rx->connect_srx);
587 case RXRPC_SERVER_BOUND:
588 case RXRPC_SERVER_LISTENING:
589 ret = rxrpc_do_sendmsg(rx, m, len);
590 /* The socket has been unlocked */
598 release_sock(&rx->sk);
600 _leave(" = %d", ret);
605 * set RxRPC socket options
607 static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
608 char __user *optval, unsigned int optlen)
610 struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
611 unsigned int min_sec_level;
612 u16 service_upgrade[2];
615 _enter(",%d,%d,,%d", level, optname, optlen);
620 if (level == SOL_RXRPC) {
622 case RXRPC_EXCLUSIVE_CONNECTION:
627 if (rx->sk.sk_state != RXRPC_UNBOUND)
629 rx->exclusive = true;
632 case RXRPC_SECURITY_KEY:
637 if (rx->sk.sk_state != RXRPC_UNBOUND)
639 ret = rxrpc_request_key(rx, optval, optlen);
642 case RXRPC_SECURITY_KEYRING:
647 if (rx->sk.sk_state != RXRPC_UNBOUND)
649 ret = rxrpc_server_keyring(rx, optval, optlen);
652 case RXRPC_MIN_SECURITY_LEVEL:
654 if (optlen != sizeof(unsigned int))
657 if (rx->sk.sk_state != RXRPC_UNBOUND)
659 ret = get_user(min_sec_level,
660 (unsigned int __user *) optval);
664 if (min_sec_level > RXRPC_SECURITY_MAX)
666 rx->min_sec_level = min_sec_level;
669 case RXRPC_UPGRADEABLE_SERVICE:
671 if (optlen != sizeof(service_upgrade) ||
672 rx->service_upgrade.from != 0)
675 if (rx->sk.sk_state != RXRPC_SERVER_BOUND2)
678 if (copy_from_user(service_upgrade, optval,
679 sizeof(service_upgrade)) != 0)
682 if ((service_upgrade[0] != rx->srx.srx_service ||
683 service_upgrade[1] != rx->second_service) &&
684 (service_upgrade[0] != rx->second_service ||
685 service_upgrade[1] != rx->srx.srx_service))
687 rx->service_upgrade.from = service_upgrade[0];
688 rx->service_upgrade.to = service_upgrade[1];
699 release_sock(&rx->sk);
704 * Get socket options.
706 static int rxrpc_getsockopt(struct socket *sock, int level, int optname,
707 char __user *optval, int __user *_optlen)
711 if (level != SOL_RXRPC)
714 if (get_user(optlen, _optlen))
718 case RXRPC_SUPPORTED_CMSG:
719 if (optlen < sizeof(int))
721 if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) ||
722 put_user(sizeof(int), _optlen))
732 * permit an RxRPC socket to be polled
734 static __poll_t rxrpc_poll(struct file *file, struct socket *sock,
737 struct sock *sk = sock->sk;
738 struct rxrpc_sock *rx = rxrpc_sk(sk);
741 sock_poll_wait(file, sock, wait);
744 /* the socket is readable if there are any messages waiting on the Rx
746 if (!list_empty(&rx->recvmsg_q))
747 mask |= EPOLLIN | EPOLLRDNORM;
749 /* the socket is writable if there is space to add new data to the
750 * socket; there is no guarantee that any particular call in progress
751 * on the socket may have space in the Tx ACK window */
752 if (rxrpc_writable(sk))
753 mask |= EPOLLOUT | EPOLLWRNORM;
759 * create an RxRPC socket
761 static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
764 struct rxrpc_net *rxnet;
765 struct rxrpc_sock *rx;
768 _enter("%p,%d", sock, protocol);
770 /* we support transport protocol UDP/UDP6 only */
771 if (protocol != PF_INET &&
772 IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6)
773 return -EPROTONOSUPPORT;
775 if (sock->type != SOCK_DGRAM)
776 return -ESOCKTNOSUPPORT;
778 sock->ops = &rxrpc_rpc_ops;
779 sock->state = SS_UNCONNECTED;
781 sk = sk_alloc(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto, kern);
785 sock_init_data(sock, sk);
786 sock_set_flag(sk, SOCK_RCU_FREE);
787 sk->sk_state = RXRPC_UNBOUND;
788 sk->sk_write_space = rxrpc_write_space;
789 sk->sk_max_ack_backlog = 0;
790 sk->sk_destruct = rxrpc_sock_destructor;
793 rx->family = protocol;
796 spin_lock_init(&rx->incoming_lock);
797 INIT_LIST_HEAD(&rx->sock_calls);
798 INIT_LIST_HEAD(&rx->to_be_accepted);
799 INIT_LIST_HEAD(&rx->recvmsg_q);
800 rwlock_init(&rx->recvmsg_lock);
801 rwlock_init(&rx->call_lock);
802 memset(&rx->srx, 0, sizeof(rx->srx));
804 rxnet = rxrpc_net(sock_net(&rx->sk));
805 timer_reduce(&rxnet->peer_keepalive_timer, jiffies + 1);
807 _leave(" = 0 [%p]", rx);
812 * Kill all the calls on a socket and shut it down.
814 static int rxrpc_shutdown(struct socket *sock, int flags)
816 struct sock *sk = sock->sk;
817 struct rxrpc_sock *rx = rxrpc_sk(sk);
820 _enter("%p,%d", sk, flags);
822 if (flags != SHUT_RDWR)
824 if (sk->sk_state == RXRPC_CLOSE)
829 spin_lock_bh(&sk->sk_receive_queue.lock);
830 if (sk->sk_state < RXRPC_CLOSE) {
831 sk->sk_state = RXRPC_CLOSE;
832 sk->sk_shutdown = SHUTDOWN_MASK;
836 spin_unlock_bh(&sk->sk_receive_queue.lock);
838 rxrpc_discard_prealloc(rx);
845 * RxRPC socket destructor
847 static void rxrpc_sock_destructor(struct sock *sk)
851 rxrpc_purge_queue(&sk->sk_receive_queue);
853 WARN_ON(refcount_read(&sk->sk_wmem_alloc));
854 WARN_ON(!sk_unhashed(sk));
855 WARN_ON(sk->sk_socket);
857 if (!sock_flag(sk, SOCK_DEAD)) {
858 printk("Attempt to release alive rxrpc socket: %p\n", sk);
864 * release an RxRPC socket
866 static int rxrpc_release_sock(struct sock *sk)
868 struct rxrpc_sock *rx = rxrpc_sk(sk);
869 struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
871 _enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
873 /* declare the socket closed for business */
875 sk->sk_shutdown = SHUTDOWN_MASK;
877 /* We want to kill off all connections from a service socket
878 * as fast as possible because we can't share these; client
879 * sockets, on the other hand, can share an endpoint.
881 switch (sk->sk_state) {
882 case RXRPC_SERVER_BOUND:
883 case RXRPC_SERVER_BOUND2:
884 case RXRPC_SERVER_LISTENING:
885 case RXRPC_SERVER_LISTEN_DISABLED:
886 rx->local->service_closed = true;
890 spin_lock_bh(&sk->sk_receive_queue.lock);
891 sk->sk_state = RXRPC_CLOSE;
892 spin_unlock_bh(&sk->sk_receive_queue.lock);
894 if (rx->local && rcu_access_pointer(rx->local->service) == rx) {
895 write_lock(&rx->local->services_lock);
896 rcu_assign_pointer(rx->local->service, NULL);
897 write_unlock(&rx->local->services_lock);
900 /* try to flush out this socket */
901 rxrpc_discard_prealloc(rx);
902 rxrpc_release_calls_on_socket(rx);
903 flush_workqueue(rxrpc_workqueue);
904 rxrpc_purge_queue(&sk->sk_receive_queue);
905 rxrpc_queue_work(&rxnet->service_conn_reaper);
906 rxrpc_queue_work(&rxnet->client_conn_reaper);
908 rxrpc_put_local(rx->local);
912 key_put(rx->securities);
913 rx->securities = NULL;
921 * release an RxRPC BSD socket on close() or equivalent
923 static int rxrpc_release(struct socket *sock)
925 struct sock *sk = sock->sk;
927 _enter("%p{%p}", sock, sk);
934 return rxrpc_release_sock(sk);
938 * RxRPC network protocol
940 static const struct proto_ops rxrpc_rpc_ops = {
942 .owner = THIS_MODULE,
943 .release = rxrpc_release,
945 .connect = rxrpc_connect,
946 .socketpair = sock_no_socketpair,
947 .accept = sock_no_accept,
948 .getname = sock_no_getname,
950 .ioctl = sock_no_ioctl,
951 .listen = rxrpc_listen,
952 .shutdown = rxrpc_shutdown,
953 .setsockopt = rxrpc_setsockopt,
954 .getsockopt = rxrpc_getsockopt,
955 .sendmsg = rxrpc_sendmsg,
956 .recvmsg = rxrpc_recvmsg,
957 .mmap = sock_no_mmap,
958 .sendpage = sock_no_sendpage,
961 static struct proto rxrpc_proto = {
963 .owner = THIS_MODULE,
964 .obj_size = sizeof(struct rxrpc_sock),
965 .max_header = sizeof(struct rxrpc_wire_header),
968 static const struct net_proto_family rxrpc_family_ops = {
970 .create = rxrpc_create,
971 .owner = THIS_MODULE,
975 * initialise and register the RxRPC protocol
977 static int __init af_rxrpc_init(void)
982 BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb));
984 get_random_bytes(&tmp, sizeof(tmp));
988 idr_set_cursor(&rxrpc_client_conn_ids, tmp);
991 rxrpc_call_jar = kmem_cache_create(
992 "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
993 SLAB_HWCACHE_ALIGN, NULL);
994 if (!rxrpc_call_jar) {
995 pr_notice("Failed to allocate call jar\n");
999 rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1);
1000 if (!rxrpc_workqueue) {
1001 pr_notice("Failed to allocate work queue\n");
1002 goto error_work_queue;
1005 ret = rxrpc_init_security();
1007 pr_crit("Cannot initialise security\n");
1008 goto error_security;
1011 ret = register_pernet_subsys(&rxrpc_net_ops);
1015 ret = proto_register(&rxrpc_proto, 1);
1017 pr_crit("Cannot register protocol\n");
1021 ret = sock_register(&rxrpc_family_ops);
1023 pr_crit("Cannot register socket family\n");
1027 ret = register_key_type(&key_type_rxrpc);
1029 pr_crit("Cannot register client key type\n");
1030 goto error_key_type;
1033 ret = register_key_type(&key_type_rxrpc_s);
1035 pr_crit("Cannot register server key type\n");
1036 goto error_key_type_s;
1039 ret = rxrpc_sysctl_init();
1041 pr_crit("Cannot register sysctls\n");
1048 unregister_key_type(&key_type_rxrpc_s);
1050 unregister_key_type(&key_type_rxrpc);
1052 sock_unregister(PF_RXRPC);
1054 proto_unregister(&rxrpc_proto);
1056 unregister_pernet_subsys(&rxrpc_net_ops);
1058 rxrpc_exit_security();
1060 destroy_workqueue(rxrpc_workqueue);
1062 kmem_cache_destroy(rxrpc_call_jar);
1068 * unregister the RxRPC protocol
1070 static void __exit af_rxrpc_exit(void)
1073 rxrpc_sysctl_exit();
1074 unregister_key_type(&key_type_rxrpc_s);
1075 unregister_key_type(&key_type_rxrpc);
1076 sock_unregister(PF_RXRPC);
1077 proto_unregister(&rxrpc_proto);
1078 unregister_pernet_subsys(&rxrpc_net_ops);
1079 ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
1080 ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
1082 /* Make sure the local and peer records pinned by any dying connections
1086 rxrpc_destroy_client_conn_ids();
1088 destroy_workqueue(rxrpc_workqueue);
1089 rxrpc_exit_security();
1090 kmem_cache_destroy(rxrpc_call_jar);
1094 module_init(af_rxrpc_init);
1095 module_exit(af_rxrpc_exit);