treewide: fix replace nbd@openwrt.org with nbd@nbd.name
[openwrt.org/openwrt.git] / target / linux / generic / patches-3.18 / 621-sched_act_connmark.patch
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--- /dev/null
+++ b/net/sched/act_connmark.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2011 Felix Fietkau <nbd@nbd.name>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/pkt_cls.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <net/act_api.h>
+
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_core.h>
+
+#define TCA_ACT_CONNMARK       20
+
+#define CONNMARK_TAB_MASK     3
+
+static int tcf_connmark(struct sk_buff *skb, const struct tc_action *a,
+                      struct tcf_result *res)
+{
+       struct nf_conn *c;
+       enum ip_conntrack_info ctinfo;
+       int proto;
+       int r;
+
+       if (skb->protocol == htons(ETH_P_IP)) {
+               if (skb->len < sizeof(struct iphdr))
+                       goto out;
+               proto = PF_INET;
+       } else if (skb->protocol == htons(ETH_P_IPV6)) {
+               if (skb->len < sizeof(struct ipv6hdr))
+                       goto out;
+               proto = PF_INET6;
+       } else
+               goto out;
+
+       r = nf_conntrack_in(dev_net(skb->dev), proto, NF_INET_PRE_ROUTING, skb);
+       if (r != NF_ACCEPT)
+               goto out;
+
+       c = nf_ct_get(skb, &ctinfo);
+       if (!c)
+               goto out;
+
+       skb->mark = c->mark;
+       nf_conntrack_put(skb->nfct);
+       skb->nfct = NULL;
+
+out:
+       return TC_ACT_PIPE;
+}
+
+static int tcf_connmark_init(struct net *net, struct nlattr *nla,
+                            struct nlattr *est, struct tc_action *a,
+                            int ovr, int bind)
+{
+       int ret = 0;
+
+       if (!tcf_hash_check(0, a, bind)) {
+               ret = tcf_hash_create(0, est, a, sizeof(struct tcf_common), bind);
+               if (ret)
+                   return ret;
+
+               tcf_hash_insert(a);
+               ret = ACT_P_CREATED;
+       } else {
+               if (!ovr) {
+                       tcf_hash_release(a, bind);
+                       return -EEXIST;
+               }
+       }
+
+       return ret;
+}
+
+static inline int tcf_connmark_dump(struct sk_buff *skb, struct tc_action *a,
+                               int bind, int ref)
+{
+       return skb->len;
+}
+
+static struct tc_action_ops act_connmark_ops = {
+       .kind           =       "connmark",
+       .type           =       TCA_ACT_CONNMARK,
+       .owner          =       THIS_MODULE,
+       .act            =       tcf_connmark,
+       .dump           =       tcf_connmark_dump,
+       .init           =       tcf_connmark_init,
+};
+
+MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
+MODULE_DESCRIPTION("Connection tracking mark restoring");
+MODULE_LICENSE("GPL");
+
+static int __init connmark_init_module(void)
+{
+
+       return tcf_register_action(&act_connmark_ops, CONNMARK_TAB_MASK);
+}
+
+static void __exit connmark_cleanup_module(void)
+{
+       tcf_unregister_action(&act_connmark_ops);
+}
+
+module_init(connmark_init_module);
+module_exit(connmark_cleanup_module);
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -717,6 +717,19 @@ config NET_ACT_CSUM
          To compile this code as a module, choose M here: the
          module will be called act_csum.
 
+config NET_ACT_CONNMARK
+        tristate "Connection Tracking Marking"
+        depends on NET_CLS_ACT
+        depends on NF_CONNTRACK
+        depends on NF_CONNTRACK_MARK
+        ---help---
+         Say Y here to restore the connmark from a scheduler action
+
+         If unsure, say N.
+
+         To compile this code as a module, choose M here: the
+         module will be called act_connmark.
+
 config NET_CLS_IND
        bool "Incoming device classification"
        depends on NET_CLS_U32 || NET_CLS_FW
--- a/net/sched/Makefile
+++ b/net/sched/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_NET_ACT_PEDIT)   += act_pedit
 obj-$(CONFIG_NET_ACT_SIMP)     += act_simple.o
 obj-$(CONFIG_NET_ACT_SKBEDIT)  += act_skbedit.o
 obj-$(CONFIG_NET_ACT_CSUM)     += act_csum.o
+obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o
 obj-$(CONFIG_NET_SCH_FIFO)     += sch_fifo.o
 obj-$(CONFIG_NET_SCH_CBQ)      += sch_cbq.o
 obj-$(CONFIG_NET_SCH_HTB)      += sch_htb.o
 
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