[PATCH] uml: sparse cleanups
[linux-2.6.git] / arch / um / drivers / slirp_kern.c
1 #include "linux/kernel.h"
2 #include "linux/stddef.h"
3 #include "linux/init.h"
4 #include "linux/netdevice.h"
5 #include "linux/if_arp.h"
6 #include "net_kern.h"
7 #include "net_user.h"
8 #include "kern.h"
9 #include "slirp.h"
10
11 struct slirp_init {
12         struct arg_list_dummy_wrapper argw;  /* XXX should be simpler... */
13 };
14
15 void slirp_init(struct net_device *dev, void *data)
16 {
17         struct uml_net_private *private;
18         struct slirp_data *spri;
19         struct slirp_init *init = data;
20         int i;
21
22         private = dev->priv;
23         spri = (struct slirp_data *) private->user;
24
25         spri->argw = init->argw;
26         spri->pid = -1;
27         spri->slave = -1;
28         spri->dev = dev;
29
30         slip_proto_init(&spri->slip);
31
32         dev->init = NULL;
33         dev->hard_header_len = 0;
34         dev->header_cache_update = NULL;
35         dev->hard_header_cache = NULL;
36         dev->hard_header = NULL;
37         dev->addr_len = 0;
38         dev->type = ARPHRD_SLIP;
39         dev->tx_queue_len = 256;
40         dev->flags = IFF_NOARP;
41         printk("SLIRP backend - command line:");
42         for(i=0;spri->argw.argv[i]!=NULL;i++) {
43                 printk(" '%s'",spri->argw.argv[i]);
44         }
45         printk("\n");
46 }
47
48 static unsigned short slirp_protocol(struct sk_buff *skbuff)
49 {
50         return(htons(ETH_P_IP));
51 }
52
53 static int slirp_read(int fd, struct sk_buff **skb, 
54                        struct uml_net_private *lp)
55 {
56         return(slirp_user_read(fd, (*skb)->mac.raw, (*skb)->dev->mtu, 
57                               (struct slirp_data *) &lp->user));
58 }
59
60 static int slirp_write(int fd, struct sk_buff **skb,
61                       struct uml_net_private *lp)
62 {
63         return(slirp_user_write(fd, (*skb)->data, (*skb)->len, 
64                                (struct slirp_data *) &lp->user));
65 }
66
67 struct net_kern_info slirp_kern_info = {
68         .init                   = slirp_init,
69         .protocol               = slirp_protocol,
70         .read                   = slirp_read,
71         .write                  = slirp_write,
72 };
73
74 static int slirp_setup(char *str, char **mac_out, void *data)
75 {
76         struct slirp_init *init = data;
77         int i=0;
78
79         *init = ((struct slirp_init)
80                 { .argw = { { "slirp", NULL  } } });
81
82         str = split_if_spec(str, mac_out, NULL);
83
84         if(str == NULL) { /* no command line given after MAC addr */
85                 return(1);
86         }
87
88         do {
89                 if(i>=SLIRP_MAX_ARGS-1) {
90                         printk("slirp_setup: truncating slirp arguments\n");
91                         break;
92                 }
93                 init->argw.argv[i++] = str;
94                 while(*str && *str!=',') {
95                         if(*str=='_') *str=' ';
96                         str++;
97                 }
98                 if(*str!=',')
99                         break;
100                 *str++='\0';
101         } while(1);
102         init->argw.argv[i]=NULL;
103         return(1);
104 }
105
106 static struct transport slirp_transport = {
107         .list           = LIST_HEAD_INIT(slirp_transport.list),
108         .name           = "slirp",
109         .setup          = slirp_setup,
110         .user           = &slirp_user_info,
111         .kern           = &slirp_kern_info,
112         .private_size   = sizeof(struct slirp_data),
113         .setup_size     = sizeof(struct slirp_init),
114 };
115
116 static int register_slirp(void)
117 {
118         register_transport(&slirp_transport);
119         return 0;
120 }
121
122 __initcall(register_slirp);