LXR linux/net/sched/act_meta

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module
   4 *
   5 * copyright Jamal Hadi Salim (2016)
   6*/
   7
   8#include <linux/types.h>
   9#include <linux/kernel.h>
  10#include <linux/string.h>
  11#include <linux/errno.h>
  12#include <linux/skbuff.h>
  13#include <linux/rtnetlink.h>
  14#include <linux/module.h>
  15#include <linux/init.h>
  16#include <net/netlink.h>
  17#include <net/pkt_sched.h>
  18#include <uapi/linux/tc_act/tc_ife.h>
  19#include <net/tc_act/tc_ife.h>
  20
  21static int skbtcindex_encode(struct sk_buff *skb, void *skbdata,
  22                             struct tcf_meta_info *e)
  23{
  24        u32 ifetc_index = skb->tc_index;
  25
  26        return ife_encode_meta_u16(ifetc_index, skbdata, e);
  27}
  28
  29static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len)
  30{
  31        u16 ifetc_index = *(u16 *)data;
  32
  33        skb->tc_index = ntohs(ifetc_index);
  34        return 0;
  35}
  36
  37static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e)
  38{
  39        return ife_check_meta_u16(skb->tc_index, e);
  40}
  41
  42static struct tcf_meta_ops ife_skbtcindex_ops = {
  43        .metaid = IFE_META_TCINDEX,
  44        .metatype = NLA_U16,
  45        .name = "tc_index",
  46        .synopsis = "skb tc_index 16 bit metadata",
  47        .check_presence = skbtcindex_check,
  48        .encode = skbtcindex_encode,
  49        .decode = skbtcindex_decode,
  50        .get = ife_get_meta_u16,
  51        .alloc = ife_alloc_meta_u16,
  52        .release = ife_release_meta_gen,
  53        .validate = ife_validate_meta_u16,
  54        .owner = THIS_MODULE,
  55};
  56
  57static int __init ifetc_index_init_module(void)
  58{
  59        return register_ife_op(&ife_skbtcindex_ops);
  60}
  61
  62static void __exit ifetc_index_cleanup_module(void)
  63{
  64        unregister_ife_op(&ife_skbtcindex_ops);
  65}
  66
  67module_init(ifetc_index_init_module);
  68module_exit(ifetc_index_cleanup_module);
  69
  70MODULE_AUTHOR("Jamal Hadi Salim(2016)");
  71MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module");
  72MODULE_LICENSE("GPL");
  73MODULE_ALIAS_IFE_META("tcindex");
  74