cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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act_meta_skbtcindex.c (1816B)

      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");