Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / netfilter / xt_nfacct.c

diff --git a/kernel/net/netfilter/xt_nfacct.c b/kernel/net/netfilter/xt_nfacct.c
new file mode 100644 (file)
index 0000000..8c646ed
--- /dev/null
+++ b/kernel/net/netfilter/xt_nfacct.c
@@ -0,0 +1,79 @@
+/*
+ * (C) 2011 Pablo Neira Ayuso <pablo@netfilter.org>
+ * (C) 2011 Intra2net AG <http://www.intra2net.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 (or any
+ * later at your option) as published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/nfnetlink_acct.h>
+#include <linux/netfilter/xt_nfacct.h>
+
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_DESCRIPTION("Xtables: match for the extended accounting infrastructure");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_nfacct");
+MODULE_ALIAS("ip6t_nfacct");
+
+static bool nfacct_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+       int overquota;
+       const struct xt_nfacct_match_info *info = par->targinfo;
+
+       nfnl_acct_update(skb, info->nfacct);
+
+       overquota = nfnl_acct_overquota(skb, info->nfacct);
+
+       return overquota == NFACCT_UNDERQUOTA ? false : true;
+}
+
+static int
+nfacct_mt_checkentry(const struct xt_mtchk_param *par)
+{
+       struct xt_nfacct_match_info *info = par->matchinfo;
+       struct nf_acct *nfacct;
+
+       nfacct = nfnl_acct_find_get(info->name);
+       if (nfacct == NULL) {
+               pr_info("xt_nfacct: accounting object with name `%s' "
+                       "does not exists\n", info->name);
+               return -ENOENT;
+       }
+       info->nfacct = nfacct;
+       return 0;
+}
+
+static void
+nfacct_mt_destroy(const struct xt_mtdtor_param *par)
+{
+       const struct xt_nfacct_match_info *info = par->matchinfo;
+
+       nfnl_acct_put(info->nfacct);
+}
+
+static struct xt_match nfacct_mt_reg __read_mostly = {
+       .name       = "nfacct",
+       .family     = NFPROTO_UNSPEC,
+       .checkentry = nfacct_mt_checkentry,
+       .match      = nfacct_mt,
+       .destroy    = nfacct_mt_destroy,
+       .matchsize  = sizeof(struct xt_nfacct_match_info),
+       .me         = THIS_MODULE,
+};
+
+static int __init nfacct_mt_init(void)
+{
+       return xt_register_match(&nfacct_mt_reg);
+}
+
+static void __exit nfacct_mt_exit(void)
+{
+       xt_unregister_match(&nfacct_mt_reg);
+}
+
+module_init(nfacct_mt_init);
+module_exit(nfacct_mt_exit);