Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
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 | * | |
1da177e4 | 9 | * Authors: Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
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 | */ | |
fa1a9c68 | 19 | #include <linux/module.h> |
1da177e4 | 20 | #include <linux/netdevice.h> |
fa1a9c68 | 21 | #include <linux/spinlock.h> |
1da177e4 LT |
22 | #include <net/protocol.h> |
23 | ||
c6b641a4 | 24 | #if IS_ENABLED(CONFIG_IPV6) |
dddb64bc | 25 | struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly; |
c6b641a4 | 26 | EXPORT_SYMBOL(inet6_protos); |
1da177e4 | 27 | |
41135cc8 | 28 | int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol) |
1da177e4 | 29 | { |
f9242b6b | 30 | return !cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol], |
e0ad61ec | 31 | NULL, prot) ? 0 : -1; |
1da177e4 | 32 | } |
7159039a YH |
33 | EXPORT_SYMBOL(inet6_add_protocol); |
34 | ||
41135cc8 | 35 | int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol) |
1da177e4 | 36 | { |
f9242b6b | 37 | int ret; |
1da177e4 | 38 | |
f9242b6b | 39 | ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol], |
e0ad61ec | 40 | prot, NULL) == prot) ? 0 : -1; |
1da177e4 LT |
41 | |
42 | synchronize_net(); | |
43 | ||
44 | return ret; | |
45 | } | |
7159039a | 46 | EXPORT_SYMBOL(inet6_del_protocol); |
c6b641a4 VY |
47 | #endif |
48 | ||
49 | const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS] __read_mostly; | |
ce3e0286 | 50 | EXPORT_SYMBOL(inet6_offloads); |
c6b641a4 VY |
51 | |
52 | int 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 | } | |
57 | EXPORT_SYMBOL(inet6_add_offload); | |
8ca896cf VY |
58 | |
59 | int 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 | } | |
70 | EXPORT_SYMBOL(inet6_del_offload); |