Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / bridge / br_nf_core.c

diff --git a/kernel/net/bridge/br_nf_core.c b/kernel/net/bridge/br_nf_core.c
new file mode 100644 (file)
index 0000000..20cbb72
--- /dev/null
+++ b/kernel/net/bridge/br_nf_core.c
@@ -0,0 +1,95 @@
+/*
+ *     Handle firewalling core
+ *     Linux ethernet bridge
+ *
+ *     Authors:
+ *     Lennert Buytenhek               <buytenh@gnu.org>
+ *     Bart De Schuymer                <bdschuym@pandora.be>
+ *
+ *     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.
+ *
+ *     Lennert dedicates this file to Kerstin Wurdinger.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/in_route.h>
+#include <linux/inetdevice.h>
+#include <net/route.h>
+
+#include "br_private.h"
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+
+static void fake_update_pmtu(struct dst_entry *dst, struct sock *sk,
+                            struct sk_buff *skb, u32 mtu)
+{
+}
+
+static void fake_redirect(struct dst_entry *dst, struct sock *sk,
+                         struct sk_buff *skb)
+{
+}
+
+static u32 *fake_cow_metrics(struct dst_entry *dst, unsigned long old)
+{
+       return NULL;
+}
+
+static struct neighbour *fake_neigh_lookup(const struct dst_entry *dst,
+                                          struct sk_buff *skb,
+                                          const void *daddr)
+{
+       return NULL;
+}
+
+static unsigned int fake_mtu(const struct dst_entry *dst)
+{
+       return dst->dev->mtu;
+}
+
+static struct dst_ops fake_dst_ops = {
+       .family         = AF_INET,
+       .update_pmtu    = fake_update_pmtu,
+       .redirect       = fake_redirect,
+       .cow_metrics    = fake_cow_metrics,
+       .neigh_lookup   = fake_neigh_lookup,
+       .mtu            = fake_mtu,
+};
+
+/*
+ * Initialize bogus route table used to keep netfilter happy.
+ * Currently, we fill in the PMTU entry because netfilter
+ * refragmentation needs it, and the rt_flags entry because
+ * ipt_REJECT needs it.  Future netfilter modules might
+ * require us to fill additional fields.
+ */
+static const u32 br_dst_default_metrics[RTAX_MAX] = {
+       [RTAX_MTU - 1] = 1500,
+};
+
+void br_netfilter_rtable_init(struct net_bridge *br)
+{
+       struct rtable *rt = &br->fake_rtable;
+
+       atomic_set(&rt->dst.__refcnt, 1);
+       rt->dst.dev = br->dev;
+       rt->dst.path = &rt->dst;
+       dst_init_metrics(&rt->dst, br_dst_default_metrics, true);
+       rt->dst.flags   = DST_NOXFRM | DST_FAKE_RTABLE;
+       rt->dst.ops = &fake_dst_ops;
+}
+
+int __init br_nf_core_init(void)
+{
+       return dst_entries_init(&fake_dst_ops);
+}
+
+void br_nf_core_fini(void)
+{
+       dst_entries_destroy(&fake_dst_ops);
+}