forked from luck/tmp_suning_uos_patched
b6238c04c0
Handle the few cases that need special treatment in-line using in_compat_syscall(). Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* UDPLITE An implementation of the UDP-Lite protocol (RFC 3828).
|
|
*
|
|
* Authors: Gerrit Renker <gerrit@erg.abdn.ac.uk>
|
|
*
|
|
* Changes:
|
|
* Fixes:
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "UDPLite: " fmt
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/proc_fs.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 int udplite_err(struct sk_buff *skb, u32 info)
|
|
{
|
|
return __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,
|
|
.hash = udp_lib_hash,
|
|
.unhash = udp_lib_unhash,
|
|
.rehash = udp_v4_rehash,
|
|
.get_port = udp_v4_get_port,
|
|
.memory_allocated = &udp_memory_allocated,
|
|
.sysctl_mem = sysctl_udp_mem,
|
|
.obj_size = sizeof(struct udp_sock),
|
|
.h.udp_table = &udplite_table,
|
|
};
|
|
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 struct udp_seq_afinfo udplite4_seq_afinfo = {
|
|
.family = AF_INET,
|
|
.udp_table = &udplite_table,
|
|
};
|
|
|
|
static int __net_init udplite4_proc_init_net(struct net *net)
|
|
{
|
|
if (!proc_create_net_data("udplite", 0444, net->proc_net, &udp_seq_ops,
|
|
sizeof(struct udp_iter_state), &udplite4_seq_afinfo))
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
static void __net_exit udplite4_proc_exit_net(struct net *net)
|
|
{
|
|
remove_proc_entry("udplite", net->proc_net);
|
|
}
|
|
|
|
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__);
|
|
}
|