Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / ipv4 / udplite.c

diff --git a/kernel/net/ipv4/udplite.c b/kernel/net/ipv4/udplite.c
new file mode 100644 (file)
index 0000000..3b3efbd
--- /dev/null
+++ b/kernel/net/ipv4/udplite.c
@@ -0,0 +1,141 @@
+/*
+ *  UDPLITE     An implementation of the UDP-Lite protocol (RFC 3828).
+ *
+ *  Authors:    Gerrit Renker       <gerrit@erg.abdn.ac.uk>
+ *
+ *  Changes:
+ *  Fixes:
+ *             This program is free software; you can redistribute it and/or
+ *             modify it under the terms of the GNU General Public License
+ *             as published by the Free Software Foundation; either version
+ *             2 of the License, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "UDPLite: " fmt
+
+#include <linux/export.h>
+#include "udp_impl.h"
+
+struct udp_table       udplite_table __read_mostly;
+EXPORT_SYMBOL(udplite_table);
+
+static int udplite_rcv(struct sk_buff *skb)
+{
+       return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
+}
+
+static void udplite_err(struct sk_buff *skb, u32 info)
+{
+       __udp4_lib_err(skb, info, &udplite_table);
+}
+
+static const struct net_protocol udplite_protocol = {
+       .handler        = udplite_rcv,
+       .err_handler    = udplite_err,
+       .no_policy      = 1,
+       .netns_ok       = 1,
+};
+
+struct proto   udplite_prot = {
+       .name              = "UDP-Lite",
+       .owner             = THIS_MODULE,
+       .close             = udp_lib_close,
+       .connect           = ip4_datagram_connect,
+       .disconnect        = udp_disconnect,
+       .ioctl             = udp_ioctl,
+       .init              = udplite_sk_init,
+       .destroy           = udp_destroy_sock,
+       .setsockopt        = udp_setsockopt,
+       .getsockopt        = udp_getsockopt,
+       .sendmsg           = udp_sendmsg,
+       .recvmsg           = udp_recvmsg,
+       .sendpage          = udp_sendpage,
+       .backlog_rcv       = udp_queue_rcv_skb,
+       .hash              = udp_lib_hash,
+       .unhash            = udp_lib_unhash,
+       .get_port          = udp_v4_get_port,
+       .obj_size          = sizeof(struct udp_sock),
+       .slab_flags        = SLAB_DESTROY_BY_RCU,
+       .h.udp_table       = &udplite_table,
+#ifdef CONFIG_COMPAT
+       .compat_setsockopt = compat_udp_setsockopt,
+       .compat_getsockopt = compat_udp_getsockopt,
+#endif
+       .clear_sk          = sk_prot_clear_portaddr_nulls,
+};
+EXPORT_SYMBOL(udplite_prot);
+
+static struct inet_protosw udplite4_protosw = {
+       .type           =  SOCK_DGRAM,
+       .protocol       =  IPPROTO_UDPLITE,
+       .prot           =  &udplite_prot,
+       .ops            =  &inet_dgram_ops,
+       .flags          =  INET_PROTOSW_PERMANENT,
+};
+
+#ifdef CONFIG_PROC_FS
+
+static const struct file_operations udplite_afinfo_seq_fops = {
+       .owner    = THIS_MODULE,
+       .open     = udp_seq_open,
+       .read     = seq_read,
+       .llseek   = seq_lseek,
+       .release  = seq_release_net
+};
+
+static struct udp_seq_afinfo udplite4_seq_afinfo = {
+       .name           = "udplite",
+       .family         = AF_INET,
+       .udp_table      = &udplite_table,
+       .seq_fops       = &udplite_afinfo_seq_fops,
+       .seq_ops        = {
+               .show           = udp4_seq_show,
+       },
+};
+
+static int __net_init udplite4_proc_init_net(struct net *net)
+{
+       return udp_proc_register(net, &udplite4_seq_afinfo);
+}
+
+static void __net_exit udplite4_proc_exit_net(struct net *net)
+{
+       udp_proc_unregister(net, &udplite4_seq_afinfo);
+}
+
+static struct pernet_operations udplite4_net_ops = {
+       .init = udplite4_proc_init_net,
+       .exit = udplite4_proc_exit_net,
+};
+
+static __init int udplite4_proc_init(void)
+{
+       return register_pernet_subsys(&udplite4_net_ops);
+}
+#else
+static inline int udplite4_proc_init(void)
+{
+       return 0;
+}
+#endif
+
+void __init udplite4_register(void)
+{
+       udp_table_init(&udplite_table, "UDP-Lite");
+       if (proto_register(&udplite_prot, 1))
+               goto out_register_err;
+
+       if (inet_add_protocol(&udplite_protocol, IPPROTO_UDPLITE) < 0)
+               goto out_unregister_proto;
+
+       inet_register_protosw(&udplite4_protosw);
+
+       if (udplite4_proc_init())
+               pr_err("%s: Cannot register /proc!\n", __func__);
+       return;
+
+out_unregister_proto:
+       proto_unregister(&udplite_prot);
+out_register_err:
+       pr_crit("%s: Cannot add UDP-Lite protocol\n", __func__);
+}