From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- net/ipv6/protocol.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 net/ipv6/protocol.c (limited to 'net/ipv6/protocol.c') diff --git a/net/ipv6/protocol.c b/net/ipv6/protocol.c new file mode 100644 index 000000000..e3770abe6 --- /dev/null +++ b/net/ipv6/protocol.c @@ -0,0 +1,74 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * PF_INET6 protocol dispatch tables. + * + * Authors: Pedro Roque + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +/* + * Changes: + * + * Vince Laviano (vince@cs.stanford.edu) 16 May 2001 + * - Removed unused variable 'inet6_protocol_base' + * - Modified inet6_del_protocol() to correctly maintain copy bit. + */ +#include +#include +#include +#include + +#if IS_ENABLED(CONFIG_IPV6) +const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly; +EXPORT_SYMBOL(inet6_protos); + +int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol) +{ + return !cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol], + NULL, prot) ? 0 : -1; +} +EXPORT_SYMBOL(inet6_add_protocol); + +int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol) +{ + int ret; + + ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol], + prot, NULL) == prot) ? 0 : -1; + + synchronize_net(); + + return ret; +} +EXPORT_SYMBOL(inet6_del_protocol); +#endif + +const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS] __read_mostly; +EXPORT_SYMBOL(inet6_offloads); + +int inet6_add_offload(const struct net_offload *prot, unsigned char protocol) +{ + return !cmpxchg((const struct net_offload **)&inet6_offloads[protocol], + NULL, prot) ? 0 : -1; +} +EXPORT_SYMBOL(inet6_add_offload); + +int inet6_del_offload(const struct net_offload *prot, unsigned char protocol) +{ + int ret; + + ret = (cmpxchg((const struct net_offload **)&inet6_offloads[protocol], + prot, NULL) == prot) ? 0 : -1; + + synchronize_net(); + + return ret; +} +EXPORT_SYMBOL(inet6_del_offload); -- cgit v1.2.3-54-g00ecf