PageRenderTime 29ms CodeModel.GetById 23ms app.highlight 3ms RepoModel.GetById 1ms app.codeStats 0ms

/arch/um/drivers/daemon_kern.c

https://bitbucket.org/ndreys/linux-sunxi
C | 95 lines | 72 code | 15 blank | 8 comment | 2 complexity | 2095a8ba9ede65964f4ea7bb44407bae MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1/*
 2 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
 3 * James Leu (jleu@mindspring.net).
 4 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 5 * Copyright (C) 2001 by various other people who didn't put their name here.
 6 * Licensed under the GPL.
 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 		= "/tmp/uml.ctl" });
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);