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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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73cb88ecb9
the tcp and udp code creates a set of struct file_operations at runtime while it can also be done at compile time, with the added benefit of then having these file operations be const. the trickiest part was to get the "THIS_MODULE" reference right; the naive method of declaring a struct in the place of registration would not work for this reason. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/*
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* UDPLITEv6 An implementation of the UDP-Lite protocol over IPv6.
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* See also net/ipv4/udplite.c
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*
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* Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
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*
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* Changes:
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* Fixes:
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include "udp_impl.h"
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static int udplitev6_rcv(struct sk_buff *skb)
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{
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return __udp6_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
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}
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static void udplitev6_err(struct sk_buff *skb,
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struct inet6_skb_parm *opt,
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u8 type, u8 code, int offset, __be32 info)
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{
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__udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
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}
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static const struct inet6_protocol udplitev6_protocol = {
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.handler = udplitev6_rcv,
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.err_handler = udplitev6_err,
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.flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
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};
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struct proto udplitev6_prot = {
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.name = "UDPLITEv6",
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.owner = THIS_MODULE,
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.close = udp_lib_close,
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.connect = ip6_datagram_connect,
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.disconnect = udp_disconnect,
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.ioctl = udp_ioctl,
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.init = udplite_sk_init,
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.destroy = udpv6_destroy_sock,
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.setsockopt = udpv6_setsockopt,
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.getsockopt = udpv6_getsockopt,
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.sendmsg = udpv6_sendmsg,
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.recvmsg = udpv6_recvmsg,
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.backlog_rcv = udpv6_queue_rcv_skb,
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.hash = udp_lib_hash,
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.unhash = udp_lib_unhash,
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.get_port = udp_v6_get_port,
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.obj_size = sizeof(struct udp6_sock),
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.slab_flags = SLAB_DESTROY_BY_RCU,
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.h.udp_table = &udplite_table,
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#ifdef CONFIG_COMPAT
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.compat_setsockopt = compat_udpv6_setsockopt,
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.compat_getsockopt = compat_udpv6_getsockopt,
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#endif
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.clear_sk = sk_prot_clear_portaddr_nulls,
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};
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static struct inet_protosw udplite6_protosw = {
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.type = SOCK_DGRAM,
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.protocol = IPPROTO_UDPLITE,
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.prot = &udplitev6_prot,
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.ops = &inet6_dgram_ops,
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.no_check = 0,
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.flags = INET_PROTOSW_PERMANENT,
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};
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int __init udplitev6_init(void)
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{
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int ret;
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ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
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if (ret)
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goto out;
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ret = inet6_register_protosw(&udplite6_protosw);
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if (ret)
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goto out_udplitev6_protocol;
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out:
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return ret;
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out_udplitev6_protocol:
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inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
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goto out;
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}
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void udplitev6_exit(void)
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{
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inet6_unregister_protosw(&udplite6_protosw);
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inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
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}
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#ifdef CONFIG_PROC_FS
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static const struct file_operations udplite6_afinfo_seq_fops = {
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.owner = THIS_MODULE,
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.open = udp_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net
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};
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static struct udp_seq_afinfo udplite6_seq_afinfo = {
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.name = "udplite6",
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.family = AF_INET6,
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.udp_table = &udplite_table,
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.seq_fops = &udplite6_afinfo_seq_fops,
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.seq_ops = {
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.show = udp6_seq_show,
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},
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};
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static int __net_init udplite6_proc_init_net(struct net *net)
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{
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return udp_proc_register(net, &udplite6_seq_afinfo);
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}
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static void __net_exit udplite6_proc_exit_net(struct net *net)
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{
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udp_proc_unregister(net, &udplite6_seq_afinfo);
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}
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static struct pernet_operations udplite6_net_ops = {
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.init = udplite6_proc_init_net,
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.exit = udplite6_proc_exit_net,
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};
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int __init udplite6_proc_init(void)
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{
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return register_pernet_subsys(&udplite6_net_ops);
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}
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void udplite6_proc_exit(void)
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{
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unregister_pernet_subsys(&udplite6_net_ops);
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}
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#endif
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