cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

daemon_kern.c (2448B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
      4 * James Leu (jleu@mindspring.net).
      5 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
      6 * Copyright (C) 2001 by various other people who didn't put their name here.
      7 */
      8
      9#include <linux/init.h>
     10#include <linux/netdevice.h>
     11#include <net_kern.h>
     12#include "daemon.h"
     13
     14struct daemon_init {
     15	char *sock_type;
     16	char *ctl_sock;
     17};
     18
     19static void daemon_init(struct net_device *dev, void *data)
     20{
     21	struct uml_net_private *pri;
     22	struct daemon_data *dpri;
     23	struct daemon_init *init = data;
     24
     25	pri = netdev_priv(dev);
     26	dpri = (struct daemon_data *) pri->user;
     27	dpri->sock_type = init->sock_type;
     28	dpri->ctl_sock = init->ctl_sock;
     29	dpri->fd = -1;
     30	dpri->control = -1;
     31	dpri->dev = dev;
     32	/* We will free this pointer. If it contains crap we're burned. */
     33	dpri->ctl_addr = NULL;
     34	dpri->data_addr = NULL;
     35	dpri->local_addr = NULL;
     36
     37	printk("daemon backend (uml_switch version %d) - %s:%s",
     38	       SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock);
     39	printk("\n");
     40}
     41
     42static int daemon_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
     43{
     44	return net_recvfrom(fd, skb_mac_header(skb),
     45			    skb->dev->mtu + ETH_HEADER_OTHER);
     46}
     47
     48static int daemon_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
     49{
     50	return daemon_user_write(fd, skb->data, skb->len,
     51				 (struct daemon_data *) &lp->user);
     52}
     53
     54static const struct net_kern_info daemon_kern_info = {
     55	.init			= daemon_init,
     56	.protocol		= eth_protocol,
     57	.read			= daemon_read,
     58	.write			= daemon_write,
     59};
     60
     61static int daemon_setup(char *str, char **mac_out, void *data)
     62{
     63	struct daemon_init *init = data;
     64	char *remain;
     65
     66	*init = ((struct daemon_init)
     67		{ .sock_type 		= "unix",
     68		  .ctl_sock 		= CONFIG_UML_NET_DAEMON_DEFAULT_SOCK });
     69
     70	remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock,
     71			       NULL);
     72	if (remain != NULL)
     73		printk(KERN_WARNING "daemon_setup : Ignoring data socket "
     74		       "specification\n");
     75
     76	return 1;
     77}
     78
     79static struct transport daemon_transport = {
     80	.list 		= LIST_HEAD_INIT(daemon_transport.list),
     81	.name 		= "daemon",
     82	.setup  	= daemon_setup,
     83	.user 		= &daemon_user_info,
     84	.kern 		= &daemon_kern_info,
     85	.private_size 	= sizeof(struct daemon_data),
     86	.setup_size 	= sizeof(struct daemon_init),
     87};
     88
     89static int register_daemon(void)
     90{
     91	register_transport(&daemon_transport);
     92	return 0;
     93}
     94
     95late_initcall(register_daemon);