um: Kill directly reference of netdev->priv
[linux-2.6.git] / arch / um / drivers / pcap_kern.c
1 /*
2  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3  * Licensed under the GPL.
4  */
5
6 #include "linux/init.h"
7 #include <linux/netdevice.h>
8 #include "net_kern.h"
9 #include "pcap_user.h"
10
11 struct pcap_init {
12         char *host_if;
13         int promisc;
14         int optimize;
15         char *filter;
16 };
17
18 void pcap_init(struct net_device *dev, void *data)
19 {
20         struct uml_net_private *pri;
21         struct pcap_data *ppri;
22         struct pcap_init *init = data;
23
24         pri = netdev_priv(dev);
25         ppri = (struct pcap_data *) pri->user;
26         ppri->host_if = init->host_if;
27         ppri->promisc = init->promisc;
28         ppri->optimize = init->optimize;
29         ppri->filter = init->filter;
30
31         printk("pcap backend, host interface %s\n", ppri->host_if);
32 }
33
34 static int pcap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
35 {
36         return pcap_user_read(fd, skb_mac_header(skb),
37                               skb->dev->mtu + ETH_HEADER_OTHER,
38                               (struct pcap_data *) &lp->user);
39 }
40
41 static int pcap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
42 {
43         return -EPERM;
44 }
45
46 static const struct net_kern_info pcap_kern_info = {
47         .init                   = pcap_init,
48         .protocol               = eth_protocol,
49         .read                   = pcap_read,
50         .write                  = pcap_write,
51 };
52
53 int pcap_setup(char *str, char **mac_out, void *data)
54 {
55         struct pcap_init *init = data;
56         char *remain, *host_if = NULL, *options[2] = { NULL, NULL };
57         int i;
58
59         *init = ((struct pcap_init)
60                 { .host_if      = "eth0",
61                   .promisc      = 1,
62                   .optimize     = 0,
63                   .filter       = NULL });
64
65         remain = split_if_spec(str, &host_if, &init->filter,
66                                &options[0], &options[1], mac_out, NULL);
67         if (remain != NULL) {
68                 printk(KERN_ERR "pcap_setup - Extra garbage on "
69                        "specification : '%s'\n", remain);
70                 return 0;
71         }
72
73         if (host_if != NULL)
74                 init->host_if = host_if;
75
76         for (i = 0; i < ARRAY_SIZE(options); i++) {
77                 if (options[i] == NULL)
78                         continue;
79                 if (!strcmp(options[i], "promisc"))
80                         init->promisc = 1;
81                 else if (!strcmp(options[i], "nopromisc"))
82                         init->promisc = 0;
83                 else if (!strcmp(options[i], "optimize"))
84                         init->optimize = 1;
85                 else if (!strcmp(options[i], "nooptimize"))
86                         init->optimize = 0;
87                 else {
88                         printk(KERN_ERR "pcap_setup : bad option - '%s'\n",
89                                options[i]);
90                         return 0;
91                 }
92         }
93
94         return 1;
95 }
96
97 static struct transport pcap_transport = {
98         .list           = LIST_HEAD_INIT(pcap_transport.list),
99         .name           = "pcap",
100         .setup          = pcap_setup,
101         .user           = &pcap_user_info,
102         .kern           = &pcap_kern_info,
103         .private_size   = sizeof(struct pcap_data),
104         .setup_size     = sizeof(struct pcap_init),
105 };
106
107 static int register_pcap(void)
108 {
109         register_transport(&pcap_transport);
110         return 0;
111 }
112
113 late_initcall(register_pcap);