Merge branch 'drm-armada-fixes' of git://git.armlinux.org.uk/~rmk/linux-arm into...
[sfrench/cifs-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
14 #define pr_fmt(fmt) "UDPLite: " fmt
15
16 #include <linux/export.h>
17 #include <linux/proc_fs.h>
18 #include "udp_impl.h"
19
20 struct udp_table        udplite_table __read_mostly;
21 EXPORT_SYMBOL(udplite_table);
22
23 static int udplite_rcv(struct sk_buff *skb)
24 {
25         return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
26 }
27
28 static void udplite_err(struct sk_buff *skb, u32 info)
29 {
30         __udp4_lib_err(skb, info, &udplite_table);
31 }
32
33 static const struct net_protocol udplite_protocol = {
34         .handler        = udplite_rcv,
35         .err_handler    = udplite_err,
36         .no_policy      = 1,
37         .netns_ok       = 1,
38 };
39
40 struct proto    udplite_prot = {
41         .name              = "UDP-Lite",
42         .owner             = THIS_MODULE,
43         .close             = udp_lib_close,
44         .connect           = ip4_datagram_connect,
45         .disconnect        = udp_disconnect,
46         .ioctl             = udp_ioctl,
47         .init              = udplite_sk_init,
48         .destroy           = udp_destroy_sock,
49         .setsockopt        = udp_setsockopt,
50         .getsockopt        = udp_getsockopt,
51         .sendmsg           = udp_sendmsg,
52         .recvmsg           = udp_recvmsg,
53         .sendpage          = udp_sendpage,
54         .hash              = udp_lib_hash,
55         .unhash            = udp_lib_unhash,
56         .get_port          = udp_v4_get_port,
57         .memory_allocated  = &udp_memory_allocated,
58         .sysctl_mem        = sysctl_udp_mem,
59         .obj_size          = sizeof(struct udp_sock),
60         .h.udp_table       = &udplite_table,
61 #ifdef CONFIG_COMPAT
62         .compat_setsockopt = compat_udp_setsockopt,
63         .compat_getsockopt = compat_udp_getsockopt,
64 #endif
65 };
66 EXPORT_SYMBOL(udplite_prot);
67
68 static struct inet_protosw udplite4_protosw = {
69         .type           =  SOCK_DGRAM,
70         .protocol       =  IPPROTO_UDPLITE,
71         .prot           =  &udplite_prot,
72         .ops            =  &inet_dgram_ops,
73         .flags          =  INET_PROTOSW_PERMANENT,
74 };
75
76 #ifdef CONFIG_PROC_FS
77 static struct udp_seq_afinfo udplite4_seq_afinfo = {
78         .family         = AF_INET,
79         .udp_table      = &udplite_table,
80 };
81
82 static int __net_init udplite4_proc_init_net(struct net *net)
83 {
84         if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops,
85                         sizeof(struct udp_iter_state), &udplite4_seq_afinfo))
86                 return -ENOMEM;
87         return 0;
88 }
89
90 static void __net_exit udplite4_proc_exit_net(struct net *net)
91 {
92         remove_proc_entry("udplite", net->proc_net);
93 }
94
95 static struct pernet_operations udplite4_net_ops = {
96         .init = udplite4_proc_init_net,
97         .exit = udplite4_proc_exit_net,
98 };
99
100 static __init int udplite4_proc_init(void)
101 {
102         return register_pernet_subsys(&udplite4_net_ops);
103 }
104 #else
105 static inline int udplite4_proc_init(void)
106 {
107         return 0;
108 }
109 #endif
110
111 void __init udplite4_register(void)
112 {
113         udp_table_init(&udplite_table, "UDP-Lite");
114         if (proto_register(&udplite_prot, 1))
115                 goto out_register_err;
116
117         if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
118                 goto out_unregister_proto;
119
120         inet_register_protosw(&udplite4_protosw);
121
122         if (udplite4_proc_init())
123                 pr_err("%s: Cannot register /proc!\n", __func__);
124         return;
125
126 out_unregister_proto:
127         proto_unregister(&udplite_prot);
128 out_register_err:
129         pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
130 }