1 files changed, 754 insertions, 0 deletions

diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
new file mode 100644
index 000000000000..bfa8822e2286
--- /dev/null
+++ b/net/rxrpc/af_rxrpc.c
@@ -0,0 +1,754 @@
+/* AF_RXRPC implementation
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include <linux/poll.h>
+#include <linux/proc_fs.h>
+#include <net/sock.h>
+#include <net/af_rxrpc.h>
+#include "ar-internal.h"
+
+MODULE_DESCRIPTION("RxRPC network protocol");
+MODULE_AUTHOR("Red Hat, Inc.");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_RXRPC);
+
+unsigned rxrpc_debug; // = RXRPC_DEBUG_KPROTO;
+module_param_named(debug, rxrpc_debug, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(rxrpc_debug, "RxRPC debugging mask");
+
+static int sysctl_rxrpc_max_qlen __read_mostly = 10;
+
+static struct proto rxrpc_proto;
+static const struct proto_ops rxrpc_rpc_ops;
+
+/* local epoch for detecting local-end reset */
+__be32 rxrpc_epoch;
+
+/* current debugging ID */
+atomic_t rxrpc_debug_id;
+
+/* count of skbs currently in use */
+atomic_t rxrpc_n_skbs;
+
+static void rxrpc_sock_destructor(struct sock *);
+
+/*
+ * see if an RxRPC socket is currently writable
+ */
+static inline int rxrpc_writable(struct sock *sk)
+{
+        return atomic_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf;
+}
+
+/*
+ * wait for write bufferage to become available
+ */
+static void rxrpc_write_space(struct sock *sk)
+{
+        _enter("%p", sk);
+        read_lock(&sk->sk_callback_lock);
+        if (rxrpc_writable(sk)) {
+                if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+                        wake_up_interruptible(sk->sk_sleep);
+                sk_wake_async(sk, 2, POLL_OUT);
+        }
+        read_unlock(&sk->sk_callback_lock);
+}
+
+/*
+ * validate an RxRPC address
+ */
+static int rxrpc_validate_address(struct rxrpc_sock *rx,
+                                  struct sockaddr_rxrpc *srx,
+                                  int len)
+{
+        if (len < sizeof(struct sockaddr_rxrpc))
+                return -EINVAL;
+
+        if (srx->srx_family != AF_RXRPC)
+                return -EAFNOSUPPORT;
+
+        if (srx->transport_type != SOCK_DGRAM)
+                return -ESOCKTNOSUPPORT;
+
+        len -= offsetof(struct sockaddr_rxrpc, transport);
+        if (srx->transport_len < sizeof(sa_family_t) ||
+            srx->transport_len > len)
+                return -EINVAL;
+
+        if (srx->transport.family != rx->proto)
+                return -EAFNOSUPPORT;
+
+        switch (srx->transport.family) {
+        case AF_INET:
+                _debug("INET: %x @ %u.%u.%u.%u",
+                       ntohs(srx->transport.sin.sin_port),
+                       NIPQUAD(srx->transport.sin.sin_addr));
+                if (srx->transport_len > 8)
+                        memset((void *)&srx->transport + 8, 0,
+                               srx->transport_len - 8);
+                break;
+
+        case AF_INET6:
+        default:
+                return -EAFNOSUPPORT;
+        }
+
+        return 0;
+}
+
+/*
+ * bind a local address to an RxRPC socket
+ */
+static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
+{
+        struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *) saddr;
+        struct sock *sk = sock->sk;
+        struct rxrpc_local *local;
+        struct rxrpc_sock *rx = rxrpc_sk(sk), *prx;
+        __be16 service_id;
+        int ret;
+
+        _enter("%p,%p,%d", rx, saddr, len);
+
+        ret = rxrpc_validate_address(rx, srx, len);
+        if (ret < 0)
+                goto error;
+
+        lock_sock(&rx->sk);
+
+        if (rx->sk.sk_state != RXRPC_UNCONNECTED) {
+                ret = -EINVAL;
+                goto error_unlock;
+        }
+
+        memcpy(&rx->srx, srx, sizeof(rx->srx));
+
+        /* find a local transport endpoint if we don't have one already */
+        local = rxrpc_lookup_local(&rx->srx);
+        if (IS_ERR(local)) {
+                ret = PTR_ERR(local);
+                goto error_unlock;
+        }
+
+        rx->local = local;
+        if (srx->srx_service) {
+                service_id = htons(srx->srx_service);
+                write_lock_bh(&local->services_lock);
+                list_for_each_entry(prx, &local->services, listen_link) {
+                        if (prx->service_id == service_id)
+                                goto service_in_use;
+                }
+
+                rx->service_id = service_id;
+                list_add_tail(&rx->listen_link, &local->services);
+                write_unlock_bh(&local->services_lock);
+
+                rx->sk.sk_state = RXRPC_SERVER_BOUND;
+        } else {
+                rx->sk.sk_state = RXRPC_CLIENT_BOUND;
+        }
+
+        release_sock(&rx->sk);
+        _leave(" = 0");
+        return 0;
+
+service_in_use:
+        ret = -EADDRINUSE;
+        write_unlock_bh(&local->services_lock);
+error_unlock:
+        release_sock(&rx->sk);
+error:
+        _leave(" = %d", ret);
+        return ret;
+}
+
+/*
+ * set the number of pending calls permitted on a listening socket
+ */
+static int rxrpc_listen(struct socket *sock, int backlog)
+{
+        struct sock *sk = sock->sk;
+        struct rxrpc_sock *rx = rxrpc_sk(sk);
+        int ret;
+
+        _enter("%p,%d", rx, backlog);
+
+        lock_sock(&rx->sk);
+
+        switch (rx->sk.sk_state) {
+        case RXRPC_UNCONNECTED:
+                ret = -EADDRNOTAVAIL;
+                break;
+        case RXRPC_CLIENT_BOUND:
+        case RXRPC_CLIENT_CONNECTED:
+        default:
+                ret = -EBUSY;
+                break;
+        case RXRPC_SERVER_BOUND:
+                ASSERT(rx->local != NULL);
+                sk->sk_max_ack_backlog = backlog;
+                rx->sk.sk_state = RXRPC_SERVER_LISTENING;
+                ret = 0;
+                break;
+        }
+
+        release_sock(&rx->sk);
+        _leave(" = %d", ret);
+        return ret;
+}
+
+/*
+ * find a transport by address
+ */
+static struct rxrpc_transport *rxrpc_name_to_transport(struct socket *sock,
+                                                       struct sockaddr *addr,
+                                                       int addr_len, int flags)
+{
+        struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *) addr;
+        struct rxrpc_transport *trans;
+        struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
+        struct rxrpc_peer *peer;
+
+        _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
+
+        ASSERT(rx->local != NULL);
+        ASSERT(rx->sk.sk_state > RXRPC_UNCONNECTED);
+
+        if (rx->srx.transport_type != srx->transport_type)
+                return ERR_PTR(-ESOCKTNOSUPPORT);
+        if (rx->srx.transport.family != srx->transport.family)
+                return ERR_PTR(-EAFNOSUPPORT);
+
+        /* find a remote transport endpoint from the local one */
+        peer = rxrpc_get_peer(srx, GFP_KERNEL);
+        if (IS_ERR(peer))
+                return ERR_PTR(PTR_ERR(peer));
+
+        /* find a transport */
+        trans = rxrpc_get_transport(rx->local, peer, GFP_KERNEL);
+        rxrpc_put_peer(peer);
+        _leave(" = %p", trans);
+        return trans;
+}
+
+/*
+ * connect an RxRPC socket
+ * - this just targets it at a specific destination; no actual connection
+ *   negotiation takes place
+ */
+static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
+                         int addr_len, int flags)
+{
+        struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *) addr;
+        struct sock *sk = sock->sk;
+        struct rxrpc_transport *trans;
+        struct rxrpc_local *local;
+        struct rxrpc_sock *rx = rxrpc_sk(sk);
+        int ret;
+
+        _enter("%p,%p,%d,%d", rx, addr, addr_len, flags);
+
+        ret = rxrpc_validate_address(rx, srx, addr_len);
+        if (ret < 0) {
+                _leave(" = %d [bad addr]", ret);
+                return ret;
+        }
+
+        lock_sock(&rx->sk);
+
+        switch (rx->sk.sk_state) {
+        case RXRPC_UNCONNECTED:
+                /* find a local transport endpoint if we don't have one already */
+                ASSERTCMP(rx->local, ==, NULL);
+                rx->srx.srx_family = AF_RXRPC;
+                rx->srx.srx_service = 0;
+                rx->srx.transport_type = srx->transport_type;
+                rx->srx.transport_len = sizeof(sa_family_t);
+                rx->srx.transport.family = srx->transport.family;
+                local = rxrpc_lookup_local(&rx->srx);
+                if (IS_ERR(local)) {
+                        release_sock(&rx->sk);
+                        return PTR_ERR(local);
+                }
+                rx->local = local;
+                rx->sk.sk_state = RXRPC_CLIENT_BOUND;
+        case RXRPC_CLIENT_BOUND:
+                break;
+        case RXRPC_CLIENT_CONNECTED:
+                release_sock(&rx->sk);
+                return -EISCONN;
+        default:
+                release_sock(&rx->sk);
+                return -EBUSY; /* server sockets can't connect as well */
+        }
+
+        trans = rxrpc_name_to_transport(sock, addr, addr_len, flags);
+        if (IS_ERR(trans)) {
+                release_sock(&rx->sk);
+                _leave(" = %ld", PTR_ERR(trans));
+                return PTR_ERR(trans);
+        }
+
+        rx->trans = trans;
+        rx->service_id = htons(srx->srx_service);
+        rx->sk.sk_state = RXRPC_CLIENT_CONNECTED;
+
+        release_sock(&rx->sk);
+        return 0;
+}
+
+/*
+ * send a message through an RxRPC socket
+ * - in a client this does a number of things:
+ *   - finds/sets up a connection for the security specified (if any)
+ *   - initiates a call (ID in control data)
+ *   - ends the request phase of a call (if MSG_MORE is not set)
+ *   - sends a call data packet
+ *   - may send an abort (abort code in control data)
+ */
+static int rxrpc_sendmsg(struct kiocb *iocb, struct socket *sock,
+                         struct msghdr *m, size_t len)
+{
+        struct rxrpc_transport *trans;
+        struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
+        int ret;
+
+        _enter(",{%d},,%zu", rx->sk.sk_state, len);
+
+        if (m->msg_flags & MSG_OOB)
+                return -EOPNOTSUPP;
+
+        if (m->msg_name) {
+                ret = rxrpc_validate_address(rx, m->msg_name, m->msg_namelen);
+                if (ret < 0) {
+                        _leave(" = %d [bad addr]", ret);
+                        return ret;
+                }
+        }
+
+        trans = NULL;
+        lock_sock(&rx->sk);
+
+        if (m->msg_name) {
+                ret = -EISCONN;
+                trans = rxrpc_name_to_transport(sock, m->msg_name,
+                                                m->msg_namelen, 0);
+                if (IS_ERR(trans)) {
+                        ret = PTR_ERR(trans);
+                        trans = NULL;
+                        goto out;
+                }
+        } else {
+                trans = rx->trans;
+                if (trans)
+                        atomic_inc(&trans->usage);
+        }
+
+        switch (rx->sk.sk_state) {
+        case RXRPC_SERVER_LISTENING:
+                if (!m->msg_name) {
+                        ret = rxrpc_server_sendmsg(iocb, rx, m, len);
+                        break;
+                }
+        case RXRPC_SERVER_BOUND:
+        case RXRPC_CLIENT_BOUND:
+                if (!m->msg_name) {
+                        ret = -ENOTCONN;
+                        break;
+                }
+        case RXRPC_CLIENT_CONNECTED:
+                ret = rxrpc_client_sendmsg(iocb, rx, trans, m, len);
+                break;
+        default:
+                ret = -ENOTCONN;
+                break;
+        }
+
+out:
+        release_sock(&rx->sk);
+        if (trans)
+                rxrpc_put_transport(trans);
+        _leave(" = %d", ret);
+        return ret;
+}
+
+/*
+ * set RxRPC socket options
+ */
+static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
+                            char __user *optval, int optlen)
+{
+        struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
+        unsigned min_sec_level;
+        int ret;
+
+        _enter(",%d,%d,,%d", level, optname, optlen);
+
+        lock_sock(&rx->sk);
+        ret = -EOPNOTSUPP;
+
+        if (level == SOL_RXRPC) {
+                switch (optname) {
+                case RXRPC_EXCLUSIVE_CONNECTION:
+                        ret = -EINVAL;
+                        if (optlen != 0)
+                                goto error;
+                        ret = -EISCONN;
+                        if (rx->sk.sk_state != RXRPC_UNCONNECTED)
+                                goto error;
+                        set_bit(RXRPC_SOCK_EXCLUSIVE_CONN, &rx->flags);
+                        goto success;
+
+                case RXRPC_SECURITY_KEY:
+                        ret = -EINVAL;
+                        if (rx->key)
+                                goto error;
+                        ret = -EISCONN;
+                        if (rx->sk.sk_state != RXRPC_UNCONNECTED)
+                                goto error;
+                        ret = rxrpc_request_key(rx, optval, optlen);
+                        goto error;
+
+                case RXRPC_SECURITY_KEYRING:
+                        ret = -EINVAL;
+                        if (rx->key)
+                                goto error;
+                        ret = -EISCONN;
+                        if (rx->sk.sk_state != RXRPC_UNCONNECTED)
+                                goto error;
+                        ret = rxrpc_server_keyring(rx, optval, optlen);
+                        goto error;
+
+                case RXRPC_MIN_SECURITY_LEVEL:
+                        ret = -EINVAL;
+                        if (optlen != sizeof(unsigned))
+                                goto error;
+                        ret = -EISCONN;
+                        if (rx->sk.sk_state != RXRPC_UNCONNECTED)
+                                goto error;
+                        ret = get_user(min_sec_level,
+                                       (unsigned __user *) optval);
+                        if (ret < 0)
+                                goto error;
+                        ret = -EINVAL;
+                        if (min_sec_level > RXRPC_SECURITY_MAX)
+                                goto error;
+                        rx->min_sec_level = min_sec_level;
+                        goto success;
+
+                default:
+                        break;
+                }
+        }
+
+success:
+        ret = 0;
+error:
+        release_sock(&rx->sk);
+        return ret;
+}
+
+/*
+ * permit an RxRPC socket to be polled
+ */
+static unsigned int rxrpc_poll(struct file *file, struct socket *sock,
+                               poll_table *wait)
+{
+        unsigned int mask;
+        struct sock *sk = sock->sk;
+
+        poll_wait(file, sk->sk_sleep, wait);
+        mask = 0;
+
+        /* the socket is readable if there are any messages waiting on the Rx
+         * queue */
+        if (!skb_queue_empty(&sk->sk_receive_queue))
+                mask |= POLLIN | POLLRDNORM;
+
+        /* the socket is writable if there is space to add new data to the
+         * socket; there is no guarantee that any particular call in progress
+         * on the socket may have space in the Tx ACK window */
+        if (rxrpc_writable(sk))
+                mask |= POLLOUT | POLLWRNORM;
+
+        return mask;
+}
+
+/*
+ * create an RxRPC socket
+ */
+static int rxrpc_create(struct socket *sock, int protocol)
+{
+        struct rxrpc_sock *rx;
+        struct sock *sk;
+
+        _enter("%p,%d", sock, protocol);
+
+        /* we support transport protocol UDP only */
+        if (protocol != PF_INET)
+                return -EPROTONOSUPPORT;
+
+        if (sock->type != SOCK_DGRAM)
+                return -ESOCKTNOSUPPORT;
+
+        sock->ops = &rxrpc_rpc_ops;
+        sock->state = SS_UNCONNECTED;
+
+        sk = sk_alloc(PF_RXRPC, GFP_KERNEL, &rxrpc_proto, 1);
+        if (!sk)
+                return -ENOMEM;
+
+        sock_init_data(sock, sk);
+        sk->sk_state            = RXRPC_UNCONNECTED;
+        sk->sk_write_space      = rxrpc_write_space;
+        sk->sk_max_ack_backlog  = sysctl_rxrpc_max_qlen;
+        sk->sk_destruct         = rxrpc_sock_destructor;
+
+        rx = rxrpc_sk(sk);
+        rx->proto = protocol;
+        rx->calls = RB_ROOT;
+
+        INIT_LIST_HEAD(&rx->listen_link);
+        INIT_LIST_HEAD(&rx->secureq);
+        INIT_LIST_HEAD(&rx->acceptq);
+        rwlock_init(&rx->call_lock);
+        memset(&rx->srx, 0, sizeof(rx->srx));
+
+        _leave(" = 0 [%p]", rx);
+        return 0;
+}
+
+/*
+ * RxRPC socket destructor
+ */
+static void rxrpc_sock_destructor(struct sock *sk)
+{
+        _enter("%p", sk);
+
+        rxrpc_purge_queue(&sk->sk_receive_queue);
+
+        BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
+        BUG_TRAP(sk_unhashed(sk));
+        BUG_TRAP(!sk->sk_socket);
+
+        if (!sock_flag(sk, SOCK_DEAD)) {
+                printk("Attempt to release alive rxrpc socket: %p\n", sk);
+                return;
+        }
+}
+
+/*
+ * release an RxRPC socket
+ */
+static int rxrpc_release_sock(struct sock *sk)
+{
+        struct rxrpc_sock *rx = rxrpc_sk(sk);
+
+        _enter("%p{%d,%d}", sk, sk->sk_state, atomic_read(&sk->sk_refcnt));
+
+        /* declare the socket closed for business */
+        sock_orphan(sk);
+        sk->sk_shutdown = SHUTDOWN_MASK;
+
+        spin_lock_bh(&sk->sk_receive_queue.lock);
+        sk->sk_state = RXRPC_CLOSE;
+        spin_unlock_bh(&sk->sk_receive_queue.lock);
+
+        ASSERTCMP(rx->listen_link.next, !=, LIST_POISON1);
+
+        if (!list_empty(&rx->listen_link)) {
+                write_lock_bh(&rx->local->services_lock);
+                list_del(&rx->listen_link);
+                write_unlock_bh(&rx->local->services_lock);
+        }
+
+        /* try to flush out this socket */
+        rxrpc_release_calls_on_socket(rx);
+        flush_scheduled_work();
+        rxrpc_purge_queue(&sk->sk_receive_queue);
+
+        if (rx->conn) {
+                rxrpc_put_connection(rx->conn);
+                rx->conn = NULL;
+        }
+
+        if (rx->bundle) {
+                rxrpc_put_bundle(rx->trans, rx->bundle);
+                rx->bundle = NULL;
+        }
+        if (rx->trans) {
+                rxrpc_put_transport(rx->trans);
+                rx->trans = NULL;
+        }
+        if (rx->local) {
+                rxrpc_put_local(rx->local);
+                rx->local = NULL;
+        }
+
+        key_put(rx->key);
+        rx->key = NULL;
+        key_put(rx->securities);
+        rx->securities = NULL;
+        sock_put(sk);
+
+        _leave(" = 0");
+        return 0;
+}
+
+/*
+ * release an RxRPC BSD socket on close() or equivalent
+ */
+static int rxrpc_release(struct socket *sock)
+{
+        struct sock *sk = sock->sk;
+
+        _enter("%p{%p}", sock, sk);
+
+        if (!sk)
+                return 0;
+
+        sock->sk = NULL;
+
+        return rxrpc_release_sock(sk);
+}
+
+/*
+ * RxRPC network protocol
+ */
+static const struct proto_ops rxrpc_rpc_ops = {
+        .family         = PF_UNIX,
+        .owner          = THIS_MODULE,
+        .release        = rxrpc_release,
+        .bind           = rxrpc_bind,
+        .connect        = rxrpc_connect,
+        .socketpair     = sock_no_socketpair,
+        .accept         = sock_no_accept,
+        .getname        = sock_no_getname,
+        .poll           = rxrpc_poll,
+        .ioctl          = sock_no_ioctl,
+        .listen         = rxrpc_listen,
+        .shutdown       = sock_no_shutdown,
+        .setsockopt     = rxrpc_setsockopt,
+        .getsockopt     = sock_no_getsockopt,
+        .sendmsg        = rxrpc_sendmsg,
+        .recvmsg        = rxrpc_recvmsg,
+        .mmap           = sock_no_mmap,
+        .sendpage       = sock_no_sendpage,
+};
+
+static struct proto rxrpc_proto = {
+        .name           = "RXRPC",
+        .owner          = THIS_MODULE,
+        .obj_size       = sizeof(struct rxrpc_sock),
+        .max_header     = sizeof(struct rxrpc_header),
+};
+
+static struct net_proto_family rxrpc_family_ops = {
+        .family = PF_RXRPC,
+        .create = rxrpc_create,
+        .owner  = THIS_MODULE,
+};
+
+/*
+ * initialise and register the RxRPC protocol
+ */
+static int __init af_rxrpc_init(void)
+{
+        struct sk_buff *dummy_skb;
+        int ret = -1;
+
+        BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof(dummy_skb->cb));
+
+        rxrpc_epoch = htonl(xtime.tv_sec);
+
+        rxrpc_call_jar = kmem_cache_create(
+                "rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
+                SLAB_HWCACHE_ALIGN, NULL, NULL);
+        if (!rxrpc_call_jar) {
+                printk(KERN_NOTICE "RxRPC: Failed to allocate call jar\n");
+                ret = -ENOMEM;
+                goto error_call_jar;
+        }
+
+        ret = proto_register(&rxrpc_proto, 1);
+        if (ret < 0) {
+                printk(KERN_CRIT "RxRPC: Cannot register protocol\n");
+                goto error_proto;
+        }
+
+        ret = sock_register(&rxrpc_family_ops);
+        if (ret < 0) {
+                printk(KERN_CRIT "RxRPC: Cannot register socket family\n");
+                goto error_sock;
+        }
+
+        ret = register_key_type(&key_type_rxrpc);
+        if (ret < 0) {
+                printk(KERN_CRIT "RxRPC: Cannot register client key type\n");
+                goto error_key_type;
+        }
+
+        ret = register_key_type(&key_type_rxrpc_s);
+        if (ret < 0) {
+                printk(KERN_CRIT "RxRPC: Cannot register server key type\n");
+                goto error_key_type_s;
+        }
+
+#ifdef CONFIG_PROC_FS
+        proc_net_fops_create("rxrpc_calls", 0, &rxrpc_call_seq_fops);
+        proc_net_fops_create("rxrpc_conns", 0, &rxrpc_connection_seq_fops);
+#endif
+        return 0;
+
+error_key_type_s:
+        unregister_key_type(&key_type_rxrpc);
+error_key_type:
+        sock_unregister(PF_RXRPC);
+error_sock:
+        proto_unregister(&rxrpc_proto);
+error_proto:
+        kmem_cache_destroy(rxrpc_call_jar);
+error_call_jar:
+        return ret;
+}
+
+/*
+ * unregister the RxRPC protocol
+ */
+static void __exit af_rxrpc_exit(void)
+{
+        _enter("");
+        unregister_key_type(&key_type_rxrpc_s);
+        unregister_key_type(&key_type_rxrpc);
+        sock_unregister(PF_RXRPC);
+        proto_unregister(&rxrpc_proto);
+        rxrpc_destroy_all_calls();
+        rxrpc_destroy_all_connections();
+        rxrpc_destroy_all_transports();
+        rxrpc_destroy_all_peers();
+        rxrpc_destroy_all_locals();
+
+        ASSERTCMP(atomic_read(&rxrpc_n_skbs), ==, 0);
+
+        _debug("flush scheduled work");
+        flush_scheduled_work();
+        proc_net_remove("rxrpc_conns");
+        proc_net_remove("rxrpc_calls");
+        kmem_cache_destroy(rxrpc_call_jar);
+        _leave("");
+}
+
+module_init(af_rxrpc_init);
+module_exit(af_rxrpc_exit);