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_skbprio.c (1692B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * net/sched/act_meta_prio.c IFE skb->priority metadata module
      4 *
      5 * copyright Jamal Hadi Salim (2015)
      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 skbprio_check(struct sk_buff *skb, struct tcf_meta_info *e)
     22{
     23	return ife_check_meta_u32(skb->priority, e);
     24}
     25
     26static int skbprio_encode(struct sk_buff *skb, void *skbdata,
     27			  struct tcf_meta_info *e)
     28{
     29	u32 ifeprio = skb->priority; /* avoid having to cast skb->priority*/
     30
     31	return ife_encode_meta_u32(ifeprio, skbdata, e);
     32}
     33
     34static int skbprio_decode(struct sk_buff *skb, void *data, u16 len)
     35{
     36	u32 ifeprio = *(u32 *)data;
     37
     38	skb->priority = ntohl(ifeprio);
     39	return 0;
     40}
     41
     42static struct tcf_meta_ops ife_prio_ops = {
     43	.metaid = IFE_META_PRIO,
     44	.metatype = NLA_U32,
     45	.name = "skbprio",
     46	.synopsis = "skb prio metadata",
     47	.check_presence = skbprio_check,
     48	.encode = skbprio_encode,
     49	.decode = skbprio_decode,
     50	.get = ife_get_meta_u32,
     51	.alloc = ife_alloc_meta_u32,
     52	.owner = THIS_MODULE,
     53};
     54
     55static int __init ifeprio_init_module(void)
     56{
     57	return register_ife_op(&ife_prio_ops);
     58}
     59
     60static void __exit ifeprio_cleanup_module(void)
     61{
     62	unregister_ife_op(&ife_prio_ops);
     63}
     64
     65module_init(ifeprio_init_module);
     66module_exit(ifeprio_cleanup_module);
     67
     68MODULE_AUTHOR("Jamal Hadi Salim(2015)");
     69MODULE_DESCRIPTION("Inter-FE skb prio metadata action");
     70MODULE_LICENSE("GPL");
     71MODULE_ALIAS_IFE_META("skbprio");