14c850212e
To help in reducing the number of include dependencies, several files were touched as they were getting needed headers indirectly for stuff they use. Thanks also to Alan Menegotto for pointing out that net/dccp/proto.c had linux/dccp.h include twice. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
290 lines
6.3 KiB
C
290 lines
6.3 KiB
C
/*
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* linux/fs/9p/trans_socket.c
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*
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* Socket Transport Layer
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
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* Copyright (C) 1995, 1996 by Olaf Kirch <okir@monad.swb.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#include <linux/config.h>
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#include <linux/in.h>
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#include <linux/module.h>
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#include <linux/net.h>
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#include <linux/ipv6.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/un.h>
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#include <asm/uaccess.h>
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#include <linux/inet.h>
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#include <linux/idr.h>
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#include "debug.h"
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#include "v9fs.h"
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#include "transport.h"
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#define V9FS_PORT 564
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struct v9fs_trans_sock {
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struct socket *s;
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};
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/**
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* v9fs_sock_recv - receive from a socket
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* @v9ses: session information
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* @v: buffer to receive data into
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* @len: size of receive buffer
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*
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*/
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static int v9fs_sock_recv(struct v9fs_transport *trans, void *v, int len)
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{
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struct msghdr msg;
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struct kvec iov;
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int result;
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mm_segment_t oldfs;
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struct v9fs_trans_sock *ts = trans ? trans->priv : NULL;
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if (trans->status == Disconnected)
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return -EREMOTEIO;
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result = -EINVAL;
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oldfs = get_fs();
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set_fs(get_ds());
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iov.iov_base = v;
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iov.iov_len = len;
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msg.msg_name = NULL;
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msg.msg_namelen = 0;
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msg.msg_iovlen = 1;
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msg.msg_control = NULL;
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msg.msg_controllen = 0;
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msg.msg_namelen = 0;
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msg.msg_flags = MSG_NOSIGNAL;
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result = kernel_recvmsg(ts->s, &msg, &iov, 1, len, 0);
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dprintk(DEBUG_TRANS, "socket state %d\n", ts->s->state);
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set_fs(oldfs);
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if (result <= 0) {
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if (result != -ERESTARTSYS)
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trans->status = Disconnected;
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}
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return result;
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}
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/**
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* v9fs_sock_send - send to a socket
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* @v9ses: session information
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* @v: buffer to send data from
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* @len: size of send buffer
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*
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*/
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static int v9fs_sock_send(struct v9fs_transport *trans, void *v, int len)
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{
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struct kvec iov;
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struct msghdr msg;
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int result = -1;
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mm_segment_t oldfs;
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struct v9fs_trans_sock *ts = trans ? trans->priv : NULL;
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dprintk(DEBUG_TRANS, "Sending packet size %d (%x)\n", len, len);
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dump_data(v, len);
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down(&trans->writelock);
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oldfs = get_fs();
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set_fs(get_ds());
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iov.iov_base = v;
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iov.iov_len = len;
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msg.msg_name = NULL;
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msg.msg_namelen = 0;
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msg.msg_iovlen = 1;
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msg.msg_control = NULL;
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msg.msg_controllen = 0;
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msg.msg_namelen = 0;
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msg.msg_flags = MSG_NOSIGNAL;
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result = kernel_sendmsg(ts->s, &msg, &iov, 1, len);
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set_fs(oldfs);
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if (result < 0) {
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if (result != -ERESTARTSYS)
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trans->status = Disconnected;
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}
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up(&trans->writelock);
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return result;
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}
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/**
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* v9fs_tcp_init - initialize TCP socket
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* @v9ses: session information
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* @addr: address of server to mount
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* @data: mount options
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*
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*/
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static int
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v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
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{
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struct socket *csocket = NULL;
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struct sockaddr_in sin_server;
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int rc = 0;
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struct v9fs_trans_sock *ts = NULL;
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struct v9fs_transport *trans = v9ses->transport;
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sema_init(&trans->writelock, 1);
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sema_init(&trans->readlock, 1);
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ts = kmalloc(sizeof(struct v9fs_trans_sock), GFP_KERNEL);
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if (!ts)
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return -ENOMEM;
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trans->priv = ts;
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ts->s = NULL;
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if (!addr)
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return -EINVAL;
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dprintk(DEBUG_TRANS, "Connecting to %s\n", addr);
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sin_server.sin_family = AF_INET;
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sin_server.sin_addr.s_addr = in_aton(addr);
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sin_server.sin_port = htons(v9ses->port);
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sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
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rc = csocket->ops->connect(csocket,
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(struct sockaddr *)&sin_server,
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sizeof(struct sockaddr_in), 0);
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if (rc < 0) {
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eprintk(KERN_ERR,
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"v9fs_trans_tcp: problem connecting socket to %s\n",
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addr);
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return rc;
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}
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csocket->sk->sk_allocation = GFP_NOIO;
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ts->s = csocket;
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trans->status = Connected;
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return 0;
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}
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/**
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* v9fs_unix_init - initialize UNIX domain socket
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* @v9ses: session information
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* @dev_name: path to named pipe
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* @data: mount options
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*
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*/
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static int
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v9fs_unix_init(struct v9fs_session_info *v9ses, const char *dev_name,
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char *data)
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{
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int rc;
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struct socket *csocket;
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struct sockaddr_un sun_server;
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struct v9fs_transport *trans;
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struct v9fs_trans_sock *ts;
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rc = 0;
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csocket = NULL;
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trans = v9ses->transport;
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if (strlen(dev_name) > UNIX_PATH_MAX) {
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eprintk(KERN_ERR, "v9fs_trans_unix: address too long: %s\n",
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dev_name);
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return -ENOMEM;
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}
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ts = kmalloc(sizeof(struct v9fs_trans_sock), GFP_KERNEL);
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if (!ts)
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return -ENOMEM;
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trans->priv = ts;
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ts->s = NULL;
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sema_init(&trans->writelock, 1);
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sema_init(&trans->readlock, 1);
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sun_server.sun_family = PF_UNIX;
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strcpy(sun_server.sun_path, dev_name);
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sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
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rc = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
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sizeof(struct sockaddr_un) - 1, 0); /* -1 *is* important */
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if (rc < 0) {
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eprintk(KERN_ERR,
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"v9fs_trans_unix: problem connecting socket: %s: %d\n",
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dev_name, rc);
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return rc;
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}
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csocket->sk->sk_allocation = GFP_NOIO;
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ts->s = csocket;
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trans->status = Connected;
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return 0;
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}
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/**
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* v9fs_sock_close - shutdown socket
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* @trans: private socket structure
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*
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*/
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static void v9fs_sock_close(struct v9fs_transport *trans)
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{
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struct v9fs_trans_sock *ts;
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if (!trans)
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return;
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ts = trans->priv;
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if ((ts) && (ts->s)) {
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dprintk(DEBUG_TRANS, "closing the socket %p\n", ts->s);
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sock_release(ts->s);
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ts->s = NULL;
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trans->status = Disconnected;
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dprintk(DEBUG_TRANS, "socket closed\n");
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}
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kfree(ts);
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trans->priv = NULL;
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}
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struct v9fs_transport v9fs_trans_tcp = {
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.init = v9fs_tcp_init,
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.write = v9fs_sock_send,
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.read = v9fs_sock_recv,
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.close = v9fs_sock_close,
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};
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struct v9fs_transport v9fs_trans_unix = {
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.init = v9fs_unix_init,
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.write = v9fs_sock_send,
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.read = v9fs_sock_recv,
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.close = v9fs_sock_close,
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};
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