// SPDX-License-Identifier: GPL-2.0-or-later /* * 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 <roque@di.fc.ul.pt> */ /* * 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 <linux/module.h> #include <linux/netdevice.h> #include <linux/spinlock.h> #include <net/protocol.h> #if IS_ENABLED(CONFIG_IPV6) 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);