1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
3 * INET An implementation of the TCP/I 2 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is imp 3 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of comm 4 * interface as the means of communication with the user level.
6 * 5 *
7 * PF_INET6 protocol dispatch tab 6 * PF_INET6 protocol dispatch tables.
8 * 7 *
9 * Authors: Pedro Roque <roque@di.fc.u 8 * Authors: Pedro Roque <roque@di.fc.ul.pt>
>> 9 *
>> 10 * This program is free software; you can redistribute it and/or
>> 11 * modify it under the terms of the GNU General Public License
>> 12 * as published by the Free Software Foundation; either version
>> 13 * 2 of the License, or (at your option) any later version.
10 */ 14 */
11 15
12 /* 16 /*
13 * Changes: 17 * Changes:
14 * 18 *
15 * Vince Laviano (vince@cs.stanford.edu) 19 * Vince Laviano (vince@cs.stanford.edu) 16 May 2001
16 * - Removed unused variable 'inet6_proto 20 * - Removed unused variable 'inet6_protocol_base'
17 * - Modified inet6_del_protocol() to cor 21 * - Modified inet6_del_protocol() to correctly maintain copy bit.
18 */ 22 */
19 #include <linux/module.h> 23 #include <linux/module.h>
20 #include <linux/netdevice.h> 24 #include <linux/netdevice.h>
21 #include <linux/spinlock.h> 25 #include <linux/spinlock.h>
22 #include <net/protocol.h> 26 #include <net/protocol.h>
23 27
24 #if IS_ENABLED(CONFIG_IPV6) 28 #if IS_ENABLED(CONFIG_IPV6)
25 struct inet6_protocol __rcu *inet6_protos[MAX_ !! 29 const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly;
26 EXPORT_SYMBOL(inet6_protos); 30 EXPORT_SYMBOL(inet6_protos);
27 31
28 int inet6_add_protocol(const struct inet6_prot 32 int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
29 { 33 {
30 return !cmpxchg((const struct inet6_pr 34 return !cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
31 NULL, prot) ? 0 : -1; 35 NULL, prot) ? 0 : -1;
32 } 36 }
33 EXPORT_SYMBOL(inet6_add_protocol); 37 EXPORT_SYMBOL(inet6_add_protocol);
34 38
35 int inet6_del_protocol(const struct inet6_prot 39 int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
36 { 40 {
37 int ret; 41 int ret;
38 42
39 ret = (cmpxchg((const struct inet6_pro 43 ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
40 prot, NULL) == prot) ? 44 prot, NULL) == prot) ? 0 : -1;
41 45
42 synchronize_net(); 46 synchronize_net();
43 47
44 return ret; 48 return ret;
45 } 49 }
46 EXPORT_SYMBOL(inet6_del_protocol); 50 EXPORT_SYMBOL(inet6_del_protocol);
47 #endif 51 #endif
48 52
49 const struct net_offload __rcu *inet6_offloads 53 const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS] __read_mostly;
50 EXPORT_SYMBOL(inet6_offloads); 54 EXPORT_SYMBOL(inet6_offloads);
51 55
52 int inet6_add_offload(const struct net_offload 56 int inet6_add_offload(const struct net_offload *prot, unsigned char protocol)
53 { 57 {
54 return !cmpxchg((const struct net_offl 58 return !cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
55 NULL, prot) ? 0 : -1; 59 NULL, prot) ? 0 : -1;
56 } 60 }
57 EXPORT_SYMBOL(inet6_add_offload); 61 EXPORT_SYMBOL(inet6_add_offload);
58 62
59 int inet6_del_offload(const struct net_offload 63 int inet6_del_offload(const struct net_offload *prot, unsigned char protocol)
60 { 64 {
61 int ret; 65 int ret;
62 66
63 ret = (cmpxchg((const struct net_offlo 67 ret = (cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
64 prot, NULL) == prot) ? 68 prot, NULL) == prot) ? 0 : -1;
65 69
66 synchronize_net(); 70 synchronize_net();
67 71
68 return ret; 72 return ret;
69 } 73 }
70 EXPORT_SYMBOL(inet6_del_offload); 74 EXPORT_SYMBOL(inet6_del_offload);
71 75
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