target/linux/generic/patches-3.18/621-sched_act_connmark.patch

   1 --- /dev/null
   2 +++ b/net/sched/act_connmark.c
   3 @@ -0,0 +1,144 @@
   4 +/*
   5 + * Copyright (c) 2011 Felix Fietkau <nbd@openwrt.org>
   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 struct tcf_hashinfo connmark_hash_info;
  41 +
  42 +static int tcf_connmark(struct sk_buff *skb, const struct tc_action *a,
  43 +                      struct tcf_result *res)
  44 +{
  45 +       struct nf_conn *c;
  46 +       enum ip_conntrack_info ctinfo;
  47 +       int proto;
  48 +       int r;
  49 +
  50 +       if (skb->protocol == htons(ETH_P_IP)) {
  51 +               if (skb->len < sizeof(struct iphdr))
  52 +                       goto out;
  53 +               proto = PF_INET;
  54 +       } else if (skb->protocol == htons(ETH_P_IPV6)) {
  55 +               if (skb->len < sizeof(struct ipv6hdr))
  56 +                       goto out;
  57 +               proto = PF_INET6;
  58 +       } else
  59 +               goto out;
  60 +
  61 +       r = nf_conntrack_in(dev_net(skb->dev), proto, NF_INET_PRE_ROUTING, skb);
  62 +       if (r != NF_ACCEPT)
  63 +               goto out;
  64 +
  65 +       c = nf_ct_get(skb, &ctinfo);
  66 +       if (!c)
  67 +               goto out;
  68 +
  69 +       skb->mark = c->mark;
  70 +       nf_conntrack_put(skb->nfct);
  71 +       skb->nfct = NULL;
  72 +
  73 +out:
  74 +       return TC_ACT_PIPE;
  75 +}
  76 +
  77 +static int tcf_connmark_init(struct net *net, struct nlattr *nla,
  78 +                            struct nlattr *est, struct tc_action *a,
  79 +                            int ovr, int bind)
  80 +{
  81 +       struct tcf_common *pc;
  82 +       int ret = 0;
  83 +
  84 +       pc = tcf_hash_check(0, a, bind);
  85 +       if (!pc) {
  86 +               pc = tcf_hash_create(0, est, a, sizeof(*pc), bind);
  87 +               if (IS_ERR(pc))
  88 +                   return PTR_ERR(pc);
  89 +
  90 +               tcf_hash_insert(pc, &connmark_hash_info);
  91 +               ret = ACT_P_CREATED;
  92 +       } else {
  93 +               if (!ovr) {
  94 +                       tcf_hash_release(pc, bind, &connmark_hash_info);
  95 +                       return -EEXIST;
  96 +               }
  97 +       }
  98 +
  99 +       return ret;
 100 +}
 101 +
 102 +static inline int tcf_connmark_cleanup(struct tc_action *a, int bind)
 103 +{
 104 +       if (a->priv)
 105 +               return tcf_hash_release(a->priv, bind, &connmark_hash_info);
 106 +       return 0;
 107 +}
 108 +
 109 +static inline int tcf_connmark_dump(struct sk_buff *skb, struct tc_action *a,
 110 +                               int bind, int ref)
 111 +{
 112 +       return skb->len;
 113 +}
 114 +
 115 +static struct tc_action_ops act_connmark_ops = {
 116 +       .kind           =       "connmark",
 117 +       .hinfo          =       &connmark_hash_info,
 118 +       .type           =       TCA_ACT_CONNMARK,
 119 +       .owner          =       THIS_MODULE,
 120 +       .act            =       tcf_connmark,
 121 +       .dump           =       tcf_connmark_dump,
 122 +       .cleanup        =       tcf_connmark_cleanup,
 123 +       .init           =       tcf_connmark_init,
 124 +};
 125 +
 126 +MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
 127 +MODULE_DESCRIPTION("Connection tracking mark restoring");
 128 +MODULE_LICENSE("GPL");
 129 +
 130 +static int __init connmark_init_module(void)
 131 +{
 132 +       int ret;
 133 +
 134 +       ret = tcf_hashinfo_init(&connmark_hash_info, CONNMARK_TAB_MASK);
 135 +       if (ret)
 136 +               return ret;
 137 +
 138 +       return tcf_register_action(&act_connmark_ops);
 139 +}
 140 +
 141 +static void __exit connmark_cleanup_module(void)
 142 +{
 143 +       tcf_unregister_action(&act_connmark_ops);
 144 +}
 145 +
 146 +module_init(connmark_init_module);
 147 +module_exit(connmark_cleanup_module);
 148 --- a/net/sched/Kconfig
 149 +++ b/net/sched/Kconfig
 150 @@ -717,6 +717,19 @@ config NET_ACT_CSUM
 151           To compile this code as a module, choose M here: the
 152           module will be called act_csum.
 153
 154 +config NET_ACT_CONNMARK
 155 +        tristate "Connection Tracking Marking"
 156 +        depends on NET_CLS_ACT
 157 +        depends on NF_CONNTRACK
 158 +        depends on NF_CONNTRACK_MARK
 159 +        ---help---
 160 +         Say Y here to restore the connmark from a scheduler action
 161 +
 162 +         If unsure, say N.
 163 +
 164 +         To compile this code as a module, choose M here: the
 165 +         module will be called act_connmark.
 166 +
 167  config NET_CLS_IND
 168         bool "Incoming device classification"
 169         depends on NET_CLS_U32 || NET_CLS_FW
 170 --- a/net/sched/Makefile
 171 +++ b/net/sched/Makefile
 172 @@ -16,6 +16,7 @@ obj-$(CONFIG_NET_ACT_PEDIT)   += act_pedit
 173  obj-$(CONFIG_NET_ACT_SIMP)     += act_simple.o
 174  obj-$(CONFIG_NET_ACT_SKBEDIT)  += act_skbedit.o
 175  obj-$(CONFIG_NET_ACT_CSUM)     += act_csum.o
 176 +obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o
 177  obj-$(CONFIG_NET_SCH_FIFO)     += sch_fifo.o
 178  obj-$(CONFIG_NET_SCH_CBQ)      += sch_cbq.o
 179  obj-$(CONFIG_NET_SCH_HTB)      += sch_htb.o