Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / bridge / netfilter / ebt_mark_m.c

diff --git a/kernel/net/bridge/netfilter/ebt_mark_m.c b/kernel/net/bridge/netfilter/ebt_mark_m.c
new file mode 100644 (file)
index 0000000..d98baef
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_mark_m.c
@@ -0,0 +1,98 @@
+/*
+ *  ebt_mark_m
+ *
+ *     Authors:
+ *     Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  July, 2002
+ *
+ */
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_mark_m.h>
+
+static bool
+ebt_mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+       const struct ebt_mark_m_info *info = par->matchinfo;
+
+       if (info->bitmask & EBT_MARK_OR)
+               return !!(skb->mark & info->mask) ^ info->invert;
+       return ((skb->mark & info->mask) == info->mark) ^ info->invert;
+}
+
+static int ebt_mark_mt_check(const struct xt_mtchk_param *par)
+{
+       const struct ebt_mark_m_info *info = par->matchinfo;
+
+       if (info->bitmask & ~EBT_MARK_MASK)
+               return -EINVAL;
+       if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
+               return -EINVAL;
+       if (!info->bitmask)
+               return -EINVAL;
+       return 0;
+}
+
+
+#ifdef CONFIG_COMPAT
+struct compat_ebt_mark_m_info {
+       compat_ulong_t mark, mask;
+       uint8_t invert, bitmask;
+};
+
+static void mark_mt_compat_from_user(void *dst, const void *src)
+{
+       const struct compat_ebt_mark_m_info *user = src;
+       struct ebt_mark_m_info *kern = dst;
+
+       kern->mark = user->mark;
+       kern->mask = user->mask;
+       kern->invert = user->invert;
+       kern->bitmask = user->bitmask;
+}
+
+static int mark_mt_compat_to_user(void __user *dst, const void *src)
+{
+       struct compat_ebt_mark_m_info __user *user = dst;
+       const struct ebt_mark_m_info *kern = src;
+
+       if (put_user(kern->mark, &user->mark) ||
+           put_user(kern->mask, &user->mask) ||
+           put_user(kern->invert, &user->invert) ||
+           put_user(kern->bitmask, &user->bitmask))
+               return -EFAULT;
+       return 0;
+}
+#endif
+
+static struct xt_match ebt_mark_mt_reg __read_mostly = {
+       .name           = "mark_m",
+       .revision       = 0,
+       .family         = NFPROTO_BRIDGE,
+       .match          = ebt_mark_mt,
+       .checkentry     = ebt_mark_mt_check,
+       .matchsize      = sizeof(struct ebt_mark_m_info),
+#ifdef CONFIG_COMPAT
+       .compatsize     = sizeof(struct compat_ebt_mark_m_info),
+       .compat_from_user = mark_mt_compat_from_user,
+       .compat_to_user = mark_mt_compat_to_user,
+#endif
+       .me             = THIS_MODULE,
+};
+
+static int __init ebt_mark_m_init(void)
+{
+       return xt_register_match(&ebt_mark_mt_reg);
+}
+
+static void __exit ebt_mark_m_fini(void)
+{
+       xt_unregister_match(&ebt_mark_mt_reg);
+}
+
+module_init(ebt_mark_m_init);
+module_exit(ebt_mark_m_fini);
+MODULE_DESCRIPTION("Ebtables: Packet mark match");
+MODULE_LICENSE("GPL");