Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / ipv6 / protocol.c

diff --git a/kernel/net/ipv6/protocol.c b/kernel/net/ipv6/protocol.c
new file mode 100644 (file)
index 0000000..e3770ab
--- /dev/null
+++ b/kernel/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     <roque@di.fc.ul.pt>
+ *
+ *             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 <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <net/protocol.h>
+
+#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);