1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * PF_INET6 protocol dispatch tables.
8 *
9 * Authors: Pedro Roque <roque@di.fc.ul.pt>
10 */
11
12/*
13 * Changes:
14 *
15 * Vince Laviano (vince@cs.stanford.edu) 16 May 2001
16 * - Removed unused variable 'inet6_protocol_base'
17 * - Modified inet6_del_protocol() to correctly maintain copy bit.
18 */
19#include <linux/module.h>
20#include <linux/netdevice.h>
21#include <linux/spinlock.h>
22#include <net/protocol.h>
23
24#if IS_ENABLED(CONFIG_IPV6)
25struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly;
26EXPORT_SYMBOL(inet6_protos);
27
28int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
29{
30 return !cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
31 NULL, prot) ? 0 : -1;
32}
33EXPORT_SYMBOL(inet6_add_protocol);
34
35int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
36{
37 int ret;
38
39 ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
40 prot, NULL) == prot) ? 0 : -1;
41
42 synchronize_net();
43
44 return ret;
45}
46EXPORT_SYMBOL(inet6_del_protocol);
47#endif
48
49const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS] __read_mostly;
50EXPORT_SYMBOL(inet6_offloads);
51
52int inet6_add_offload(const struct net_offload *prot, unsigned char protocol)
53{
54 return !cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
55 NULL, prot) ? 0 : -1;
56}
57EXPORT_SYMBOL(inet6_add_offload);
58
59int inet6_del_offload(const struct net_offload *prot, unsigned char protocol)
60{
61 int ret;
62
63 ret = (cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
64 prot, NULL) == prot) ? 0 : -1;
65
66 synchronize_net();
67
68 return ret;
69}
70EXPORT_SYMBOL(inet6_del_offload);
71