igmp: Use next_net_device_rcu()
[linux-2.6.git] / net / ipv4 / udplite.c
1 /*
2  *  UDPLITE     An implementation of the UDP-Lite protocol (RFC 3828).
3  *
4  *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
5  *
6  *  Changes:
7  *  Fixes:
8  *              This program is free software; you can redistribute it and/or
9  *              modify it under the terms of the GNU General Public License
10  *              as published by the Free Software Foundation; either version
11  *              2 of the License, or (at your option) any later version.
12  */
13 #include "udp_impl.h"
14
15 struct udp_table        udplite_table __read_mostly;
16 EXPORT_SYMBOL(udplite_table);
17
18 static int udplite_rcv(struct sk_buff *skb)
19 {
20         return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
21 }
22
23 static void udplite_err(struct sk_buff *skb, u32 info)
24 {
25         __udp4_lib_err(skb, info, &udplite_table);
26 }
27
28 static const struct net_protocol udplite_protocol = {
29         .handler        = udplite_rcv,
30         .err_handler    = udplite_err,
31         .no_policy      = 1,
32         .netns_ok       = 1,
33 };
34
35 struct proto    udplite_prot = {
36         .name              = "UDP-Lite",
37         .owner             = THIS_MODULE,
38         .close             = udp_lib_close,
39         .connect           = ip4_datagram_connect,
40         .disconnect        = udp_disconnect,
41         .ioctl             = udp_ioctl,
42         .init              = udplite_sk_init,
43         .destroy           = udp_destroy_sock,
44         .setsockopt        = udp_setsockopt,
45         .getsockopt        = udp_getsockopt,
46         .sendmsg           = udp_sendmsg,
47         .recvmsg           = udp_recvmsg,
48         .sendpage          = udp_sendpage,
49         .backlog_rcv       = udp_queue_rcv_skb,
50         .hash              = udp_lib_hash,
51         .unhash            = udp_lib_unhash,
52         .get_port          = udp_v4_get_port,
53         .obj_size          = sizeof(struct udp_sock),
54         .slab_flags        = SLAB_DESTROY_BY_RCU,
55         .h.udp_table       = &udplite_table,
56 #ifdef CONFIG_COMPAT
57         .compat_setsockopt = compat_udp_setsockopt,
58         .compat_getsockopt = compat_udp_getsockopt,
59 #endif
60 };
61
62 static struct inet_protosw udplite4_protosw = {
63         .type           =  SOCK_DGRAM,
64         .protocol       =  IPPROTO_UDPLITE,
65         .prot           =  &udplite_prot,
66         .ops            =  &inet_dgram_ops,
67         .no_check       =  0,           /* must checksum (RFC 3828) */
68         .flags          =  INET_PROTOSW_PERMANENT,
69 };
70
71 #ifdef CONFIG_PROC_FS
72 static struct udp_seq_afinfo udplite4_seq_afinfo = {
73         .name           = "udplite",
74         .family         = AF_INET,
75         .udp_table      = &udplite_table,
76         .seq_fops       = {
77                 .owner  =       THIS_MODULE,
78         },
79         .seq_ops        = {
80                 .show           = udp4_seq_show,
81         },
82 };
83
84 static int udplite4_proc_init_net(struct net *net)
85 {
86         return udp_proc_register(net, &udplite4_seq_afinfo);
87 }
88
89 static void udplite4_proc_exit_net(struct net *net)
90 {
91         udp_proc_unregister(net, &udplite4_seq_afinfo);
92 }
93
94 static struct pernet_operations udplite4_net_ops = {
95         .init = udplite4_proc_init_net,
96         .exit = udplite4_proc_exit_net,
97 };
98
99 static __init int udplite4_proc_init(void)
100 {
101         return register_pernet_subsys(&udplite4_net_ops);
102 }
103 #else
104 static inline int udplite4_proc_init(void)
105 {
106         return 0;
107 }
108 #endif
109
110 void __init udplite4_register(void)
111 {
112         udp_table_init(&udplite_table, "UDP-Lite");
113         if (proto_register(&udplite_prot, 1))
114                 goto out_register_err;
115
116         if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
117                 goto out_unregister_proto;
118
119         inet_register_protosw(&udplite4_protosw);
120
121         if (udplite4_proc_init())
122                 printk(KERN_ERR "%s: Cannot register /proc!\n", __func__);
123         return;
124
125 out_unregister_proto:
126         proto_unregister(&udplite_prot);
127 out_register_err:
128         printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
129 }
130
131 EXPORT_SYMBOL(udplite_prot);