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