130 lines
3 KiB
C
130 lines
3 KiB
C
/*
|
|
* Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
|
|
* Licensed under the GPL.
|
|
*
|
|
* Transport usage:
|
|
* ethN=vde,<vde_switch>,<mac addr>,<port>,<group>,<mode>,<description>
|
|
*
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/netdevice.h>
|
|
#include <net_kern.h>
|
|
#include <net_user.h>
|
|
#include "vde.h"
|
|
|
|
static void vde_init(struct net_device *dev, void *data)
|
|
{
|
|
struct vde_init *init = data;
|
|
struct uml_net_private *pri;
|
|
struct vde_data *vpri;
|
|
|
|
pri = netdev_priv(dev);
|
|
vpri = (struct vde_data *) pri->user;
|
|
|
|
vpri->vde_switch = init->vde_switch;
|
|
vpri->descr = init->descr ? init->descr : "UML vde_transport";
|
|
vpri->args = NULL;
|
|
vpri->conn = NULL;
|
|
vpri->dev = dev;
|
|
|
|
printk("vde backend - %s, ", vpri->vde_switch ?
|
|
vpri->vde_switch : "(default socket)");
|
|
|
|
vde_init_libstuff(vpri, init);
|
|
|
|
printk("\n");
|
|
}
|
|
|
|
static int vde_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
|
{
|
|
struct vde_data *pri = (struct vde_data *) &lp->user;
|
|
|
|
if (pri->conn != NULL)
|
|
return vde_user_read(pri->conn, skb_mac_header(skb),
|
|
skb->dev->mtu + ETH_HEADER_OTHER);
|
|
|
|
printk(KERN_ERR "vde_read - we have no VDECONN to read from");
|
|
return -EBADF;
|
|
}
|
|
|
|
static int vde_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
|
{
|
|
struct vde_data *pri = (struct vde_data *) &lp->user;
|
|
|
|
if (pri->conn != NULL)
|
|
return vde_user_write((void *)pri->conn, skb->data,
|
|
skb->len);
|
|
|
|
printk(KERN_ERR "vde_write - we have no VDECONN to write to");
|
|
return -EBADF;
|
|
}
|
|
|
|
static const struct net_kern_info vde_kern_info = {
|
|
.init = vde_init,
|
|
.protocol = eth_protocol,
|
|
.read = vde_read,
|
|
.write = vde_write,
|
|
};
|
|
|
|
static int vde_setup(char *str, char **mac_out, void *data)
|
|
{
|
|
struct vde_init *init = data;
|
|
char *remain, *port_str = NULL, *mode_str = NULL, *last;
|
|
|
|
*init = ((struct vde_init)
|
|
{ .vde_switch = NULL,
|
|
.descr = NULL,
|
|
.port = 0,
|
|
.group = NULL,
|
|
.mode = 0 });
|
|
|
|
remain = split_if_spec(str, &init->vde_switch, mac_out, &port_str,
|
|
&init->group, &mode_str, &init->descr, NULL);
|
|
|
|
if (remain != NULL)
|
|
printk(KERN_WARNING "vde_setup - Ignoring extra data :"
|
|
"'%s'\n", remain);
|
|
|
|
if (port_str != NULL) {
|
|
init->port = simple_strtoul(port_str, &last, 10);
|
|
if ((*last != '\0') || (last == port_str)) {
|
|
printk(KERN_ERR "vde_setup - Bad port : '%s'\n",
|
|
port_str);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (mode_str != NULL) {
|
|
init->mode = simple_strtoul(mode_str, &last, 8);
|
|
if ((*last != '\0') || (last == mode_str)) {
|
|
printk(KERN_ERR "vde_setup - Bad mode : '%s'\n",
|
|
mode_str);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
printk(KERN_INFO "Configured vde device: %s\n", init->vde_switch ?
|
|
init->vde_switch : "(default socket)");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct transport vde_transport = {
|
|
.list = LIST_HEAD_INIT(vde_transport.list),
|
|
.name = "vde",
|
|
.setup = vde_setup,
|
|
.user = &vde_user_info,
|
|
.kern = &vde_kern_info,
|
|
.private_size = sizeof(struct vde_data),
|
|
.setup_size = sizeof(struct vde_init),
|
|
};
|
|
|
|
static int register_vde(void)
|
|
{
|
|
register_transport(&vde_transport);
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(register_vde);
|