958aee42cf5dfa9ebd98343f1a4fdd11320f7052
[openwrt/openwrt.git] / target / linux / generic / patches-3.18 / 621-sched_act_connmark.patch
1 --- /dev/null
2 +++ b/net/sched/act_connmark.c
3 @@ -0,0 +1,126 @@
4 +/*
5 + * Copyright (c) 2011 Felix Fietkau <nbd@nbd.name>
6 + *
7 + * This program is free software; you can redistribute it and/or modify it
8 + * under the terms and conditions of the GNU General Public License,
9 + * version 2, as published by the Free Software Foundation.
10 + *
11 + * This program is distributed in the hope it will be useful, but WITHOUT
12 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 + * more details.
15 + *
16 + * You should have received a copy of the GNU General Public License along with
17 + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
18 + * Place - Suite 330, Boston, MA 02111-1307 USA.
19 + */
20 +
21 +#include <linux/module.h>
22 +#include <linux/init.h>
23 +#include <linux/kernel.h>
24 +#include <linux/skbuff.h>
25 +#include <linux/rtnetlink.h>
26 +#include <linux/pkt_cls.h>
27 +#include <linux/ip.h>
28 +#include <linux/ipv6.h>
29 +#include <net/netlink.h>
30 +#include <net/pkt_sched.h>
31 +#include <net/act_api.h>
32 +
33 +#include <net/netfilter/nf_conntrack.h>
34 +#include <net/netfilter/nf_conntrack_core.h>
35 +
36 +#define TCA_ACT_CONNMARK 20
37 +
38 +#define CONNMARK_TAB_MASK 3
39 +
40 +static int tcf_connmark(struct sk_buff *skb, const struct tc_action *a,
41 + struct tcf_result *res)
42 +{
43 + struct nf_conn *c;
44 + enum ip_conntrack_info ctinfo;
45 + int proto;
46 + int r;
47 +
48 + if (skb->protocol == htons(ETH_P_IP)) {
49 + if (skb->len < sizeof(struct iphdr))
50 + goto out;
51 + proto = PF_INET;
52 + } else if (skb->protocol == htons(ETH_P_IPV6)) {
53 + if (skb->len < sizeof(struct ipv6hdr))
54 + goto out;
55 + proto = PF_INET6;
56 + } else
57 + goto out;
58 +
59 + r = nf_conntrack_in(dev_net(skb->dev), proto, NF_INET_PRE_ROUTING, skb);
60 + if (r != NF_ACCEPT)
61 + goto out;
62 +
63 + c = nf_ct_get(skb, &ctinfo);
64 + if (!c)
65 + goto out;
66 +
67 + skb->mark = c->mark;
68 + nf_conntrack_put(skb->nfct);
69 + skb->nfct = NULL;
70 +
71 +out:
72 + return TC_ACT_PIPE;
73 +}
74 +
75 +static int tcf_connmark_init(struct net *net, struct nlattr *nla,
76 + struct nlattr *est, struct tc_action *a,
77 + int ovr, int bind)
78 +{
79 + int ret = 0;
80 +
81 + if (!tcf_hash_check(0, a, bind)) {
82 + ret = tcf_hash_create(0, est, a, sizeof(struct tcf_common), bind);
83 + if (ret)
84 + return ret;
85 +
86 + tcf_hash_insert(a);
87 + ret = ACT_P_CREATED;
88 + } else {
89 + if (!ovr) {
90 + tcf_hash_release(a, bind);
91 + return -EEXIST;
92 + }
93 + }
94 +
95 + return ret;
96 +}
97 +
98 +static inline int tcf_connmark_dump(struct sk_buff *skb, struct tc_action *a,
99 + int bind, int ref)
100 +{
101 + return skb->len;
102 +}
103 +
104 +static struct tc_action_ops act_connmark_ops = {
105 + .kind = "connmark",
106 + .type = TCA_ACT_CONNMARK,
107 + .owner = THIS_MODULE,
108 + .act = tcf_connmark,
109 + .dump = tcf_connmark_dump,
110 + .init = tcf_connmark_init,
111 +};
112 +
113 +MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
114 +MODULE_DESCRIPTION("Connection tracking mark restoring");
115 +MODULE_LICENSE("GPL");
116 +
117 +static int __init connmark_init_module(void)
118 +{
119 +
120 + return tcf_register_action(&act_connmark_ops, CONNMARK_TAB_MASK);
121 +}
122 +
123 +static void __exit connmark_cleanup_module(void)
124 +{
125 + tcf_unregister_action(&act_connmark_ops);
126 +}
127 +
128 +module_init(connmark_init_module);
129 +module_exit(connmark_cleanup_module);
130 --- a/net/sched/Kconfig
131 +++ b/net/sched/Kconfig
132 @@ -717,6 +717,19 @@ config NET_ACT_CSUM
133 To compile this code as a module, choose M here: the
134 module will be called act_csum.
135
136 +config NET_ACT_CONNMARK
137 + tristate "Connection Tracking Marking"
138 + depends on NET_CLS_ACT
139 + depends on NF_CONNTRACK
140 + depends on NF_CONNTRACK_MARK
141 + ---help---
142 + Say Y here to restore the connmark from a scheduler action
143 +
144 + If unsure, say N.
145 +
146 + To compile this code as a module, choose M here: the
147 + module will be called act_connmark.
148 +
149 config NET_CLS_IND
150 bool "Incoming device classification"
151 depends on NET_CLS_U32 || NET_CLS_FW
152 --- a/net/sched/Makefile
153 +++ b/net/sched/Makefile
154 @@ -16,6 +16,7 @@ obj-$(CONFIG_NET_ACT_PEDIT) += act_pedit
155 obj-$(CONFIG_NET_ACT_SIMP) += act_simple.o
156 obj-$(CONFIG_NET_ACT_SKBEDIT) += act_skbedit.o
157 obj-$(CONFIG_NET_ACT_CSUM) += act_csum.o
158 +obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o
159 obj-$(CONFIG_NET_SCH_FIFO) += sch_fifo.o
160 obj-$(CONFIG_NET_SCH_CBQ) += sch_cbq.o
161 obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o