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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cg_storage_multi_shared.c (1176B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2
      3/*
      4 * Copyright 2020 Google LLC.
      5 */
      6
      7#include <errno.h>
      8#include <linux/bpf.h>
      9#include <linux/ip.h>
     10#include <linux/udp.h>
     11#include <bpf/bpf_helpers.h>
     12
     13#include "progs/cg_storage_multi.h"
     14
     15struct {
     16	__uint(type, BPF_MAP_TYPE_CGROUP_STORAGE);
     17	__type(key, __u64);
     18	__type(value, struct cgroup_value);
     19} cgroup_storage SEC(".maps");
     20
     21__u32 invocations = 0;
     22
     23SEC("cgroup_skb/egress")
     24int egress1(struct __sk_buff *skb)
     25{
     26	struct cgroup_value *ptr_cg_storage =
     27		bpf_get_local_storage(&cgroup_storage, 0);
     28
     29	__sync_fetch_and_add(&ptr_cg_storage->egress_pkts, 1);
     30	__sync_fetch_and_add(&invocations, 1);
     31
     32	return 1;
     33}
     34
     35SEC("cgroup_skb/egress")
     36int egress2(struct __sk_buff *skb)
     37{
     38	struct cgroup_value *ptr_cg_storage =
     39		bpf_get_local_storage(&cgroup_storage, 0);
     40
     41	__sync_fetch_and_add(&ptr_cg_storage->egress_pkts, 1);
     42	__sync_fetch_and_add(&invocations, 1);
     43
     44	return 1;
     45}
     46
     47SEC("cgroup_skb/ingress")
     48int ingress(struct __sk_buff *skb)
     49{
     50	struct cgroup_value *ptr_cg_storage =
     51		bpf_get_local_storage(&cgroup_storage, 0);
     52
     53	__sync_fetch_and_add(&ptr_cg_storage->ingress_pkts, 1);
     54	__sync_fetch_and_add(&invocations, 1);
     55
     56	return 1;
     57}