| /* 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/kernel.h> |
| #include <linux/net.h> |
| #include <linux/slab.h> |
| #include <linux/skbuff.h> |
| #include <linux/poll.h> |
| #include <linux/proc_fs.h> |
| #include <linux/key-type.h> |
| #include <net/net_namespace.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 int rxrpc_debug; // = RXRPC_DEBUG_KPROTO; |
| module_param_named(debug, rxrpc_debug, uint, S_IWUSR | S_IRUGO); |
| MODULE_PARM_DESC(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; |
| |
| struct workqueue_struct *rxrpc_workqueue; |
| |
| 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); |
| rcu_read_lock(); |
| if (rxrpc_writable(sk)) { |
| struct socket_wq *wq = rcu_dereference(sk->sk_wq); |
| |
| if (wq_has_sleeper(wq)) |
| wake_up_interruptible(&wq->wait); |
| sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
| } |
| rcu_read_unlock(); |
| } |
| |
| /* |
| * 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 @ %pI4", |
| ntohs(srx->transport.sin.sin_port), |
| &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, |
| gfp_t gfp) |
| { |
| 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); |
| if (IS_ERR(peer)) |
| return ERR_CAST(peer); |
| |
| /* find a transport */ |
| trans = rxrpc_get_transport(rx->local, peer, gfp); |
| rxrpc_put_peer(peer); |
| _leave(" = %p", trans); |
| return trans; |
| } |
| |
| /** |
| * rxrpc_kernel_begin_call - Allow a kernel service to begin a call |
| * @sock: The socket on which to make the call |
| * @srx: The address of the peer to contact (defaults to socket setting) |
| * @key: The security context to use (defaults to socket setting) |
| * @user_call_ID: The ID to use |
| * |
| * Allow a kernel service to begin a call on the nominated socket. This just |
| * sets up all the internal tracking structures and allocates connection and |
| * call IDs as appropriate. The call to be used is returned. |
| * |
| * The default socket destination address and security may be overridden by |
| * supplying @srx and @key. |
| */ |
| struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock, |
| struct sockaddr_rxrpc *srx, |
| struct key *key, |
| unsigned long user_call_ID, |
| gfp_t gfp) |
| { |
| struct rxrpc_conn_bundle *bundle; |
| struct rxrpc_transport *trans; |
| struct rxrpc_call *call; |
| struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
| __be16 service_id; |
| |
| _enter(",,%x,%lx", key_serial(key), user_call_ID); |
| |
| lock_sock(&rx->sk); |
| |
| if (srx) { |
| trans = rxrpc_name_to_transport(sock, (struct sockaddr *) srx, |
| sizeof(*srx), 0, gfp); |
| if (IS_ERR(trans)) { |
| call = ERR_CAST(trans); |
| trans = NULL; |
| goto out_notrans; |
| } |
| } else { |
| trans = rx->trans; |
| if (!trans) { |
| call = ERR_PTR(-ENOTCONN); |
| goto out_notrans; |
| } |
| atomic_inc(&trans->usage); |
| } |
| |
| service_id = rx->service_id; |
| if (srx) |
| service_id = htons(srx->srx_service); |
| |
| if (!key) |
| key = rx->key; |
| if (key && !key->payload.data) |
| key = NULL; /* a no-security key */ |
| |
| bundle = rxrpc_get_bundle(rx, trans, key, service_id, gfp); |
| if (IS_ERR(bundle)) { |
| call = ERR_CAST(bundle); |
| goto out; |
| } |
| |
| call = rxrpc_get_client_call(rx, trans, bundle, user_call_ID, true, |
| gfp); |
| rxrpc_put_bundle(trans, bundle); |
| out: |
| rxrpc_put_transport(trans); |
| out_notrans: |
| release_sock(&rx->sk); |
| _leave(" = %p", call); |
| return call; |
| } |
| |
| EXPORT_SYMBOL(rxrpc_kernel_begin_call); |
| |
| /** |
| * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using |
| * @call: The call to end |
| * |
| * Allow a kernel service to end a call it was using. The call must be |
| * complete before this is called (the call should be aborted if necessary). |
| */ |
| void rxrpc_kernel_end_call(struct rxrpc_call *call) |
| { |
| _enter("%d{%d}", call->debug_id, atomic_read(&call->usage)); |
| rxrpc_remove_user_ID(call->socket, call); |
| rxrpc_put_call(call); |
| } |
| |
| EXPORT_SYMBOL(rxrpc_kernel_end_call); |
| |
| /** |
| * rxrpc_kernel_intercept_rx_messages - Intercept received RxRPC messages |
| * @sock: The socket to intercept received messages on |
| * @interceptor: The function to pass the messages to |
| * |
| * Allow a kernel service to intercept messages heading for the Rx queue on an |
| * RxRPC socket. They get passed to the specified function instead. |
| * @interceptor should free the socket buffers it is given. @interceptor is |
| * called with the socket receive queue spinlock held and softirqs disabled - |
| * this ensures that the messages will be delivered in the right order. |
| */ |
| void rxrpc_kernel_intercept_rx_messages(struct socket *sock, |
| rxrpc_interceptor_t interceptor) |
| { |
| struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
| |
| _enter(""); |
| rx->interceptor = interceptor; |
| } |
| |
| EXPORT_SYMBOL(rxrpc_kernel_intercept_rx_messages); |
| |
| /* |
| * 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, |
| GFP_KERNEL); |
| 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, GFP_KERNEL); |
| 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, unsigned int optlen) |
| { |
| struct rxrpc_sock *rx = rxrpc_sk(sock->sk); |
| unsigned int 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 int)) |
| goto error; |
| ret = -EISCONN; |
| if (rx->sk.sk_state != RXRPC_UNCONNECTED) |
| goto error; |
| ret = get_user(min_sec_level, |
| (unsigned int __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; |
| |
| sock_poll_wait(file, sk_sleep(sk), 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 net *net, struct socket *sock, int protocol, |
| int kern) |
| { |
| struct rxrpc_sock *rx; |
| struct sock *sk; |
| |
| _enter("%p,%d", sock, protocol); |
| |
| if (!net_eq(net, &init_net)) |
| return -EAFNOSUPPORT; |
| |
| /* 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(net, PF_RXRPC, GFP_KERNEL, &rxrpc_proto); |
| 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); |
| |
| WARN_ON(atomic_read(&sk->sk_wmem_alloc)); |
| WARN_ON(!sk_unhashed(sk)); |
| WARN_ON(sk->sk_socket); |
| |
| if (!sock_flag(sk, SOCK_DEAD)) { |
| WARN(1, "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_workqueue(rxrpc_workqueue); |
| 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 const 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) |
| { |
| int ret = -1; |
| |
| BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb)); |
| |
| rxrpc_epoch = htonl(get_seconds()); |
| |
| ret = -ENOMEM; |
| rxrpc_call_jar = kmem_cache_create( |
| "rxrpc_call_jar", sizeof(struct rxrpc_call), 0, |
| SLAB_HWCACHE_ALIGN, NULL); |
| if (!rxrpc_call_jar) { |
| printk(KERN_NOTICE "RxRPC: Failed to allocate call jar\n"); |
| goto error_call_jar; |
| } |
| |
| rxrpc_workqueue = alloc_workqueue("krxrpcd", 0, 1); |
| if (!rxrpc_workqueue) { |
| printk(KERN_NOTICE "RxRPC: Failed to allocate work queue\n"); |
| goto error_work_queue; |
| } |
| |
| 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_create("rxrpc_calls", 0, init_net.proc_net, &rxrpc_call_seq_fops); |
| proc_create("rxrpc_conns", 0, init_net.proc_net, |
| &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: |
| destroy_workqueue(rxrpc_workqueue); |
| error_work_queue: |
| 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_workqueue(rxrpc_workqueue); |
| remove_proc_entry("rxrpc_conns", init_net.proc_net); |
| remove_proc_entry("rxrpc_calls", init_net.proc_net); |
| destroy_workqueue(rxrpc_workqueue); |
| kmem_cache_destroy(rxrpc_call_jar); |
| _leave(""); |
| } |
| |
| module_init(af_rxrpc_init); |
| module_exit(af_rxrpc_exit); |