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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load_bytes_relative.c (1624B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2
      3/*
      4 * Copyright 2020 Google LLC.
      5 */
      6
      7#include <test_progs.h>
      8#include <network_helpers.h>
      9
     10void test_load_bytes_relative(void)
     11{
     12	int server_fd, cgroup_fd, prog_fd, map_fd, client_fd;
     13	int err;
     14	struct bpf_object *obj;
     15	struct bpf_program *prog;
     16	struct bpf_map *test_result;
     17	__u32 duration = 0;
     18
     19	__u32 map_key = 0;
     20	__u32 map_value = 0;
     21
     22	cgroup_fd = test__join_cgroup("/load_bytes_relative");
     23	if (CHECK_FAIL(cgroup_fd < 0))
     24		return;
     25
     26	server_fd = start_server(AF_INET, SOCK_STREAM, NULL, 0, 0);
     27	if (CHECK_FAIL(server_fd < 0))
     28		goto close_cgroup_fd;
     29
     30	err = bpf_prog_test_load("./load_bytes_relative.o", BPF_PROG_TYPE_CGROUP_SKB,
     31			    &obj, &prog_fd);
     32	if (CHECK_FAIL(err))
     33		goto close_server_fd;
     34
     35	test_result = bpf_object__find_map_by_name(obj, "test_result");
     36	if (CHECK_FAIL(!test_result))
     37		goto close_bpf_object;
     38
     39	map_fd = bpf_map__fd(test_result);
     40	if (map_fd < 0)
     41		goto close_bpf_object;
     42
     43	prog = bpf_object__find_program_by_name(obj, "load_bytes_relative");
     44	if (CHECK_FAIL(!prog))
     45		goto close_bpf_object;
     46
     47	err = bpf_prog_attach(prog_fd, cgroup_fd, BPF_CGROUP_INET_EGRESS,
     48			      BPF_F_ALLOW_MULTI);
     49	if (CHECK_FAIL(err))
     50		goto close_bpf_object;
     51
     52	client_fd = connect_to_fd(server_fd, 0);
     53	if (CHECK_FAIL(client_fd < 0))
     54		goto close_bpf_object;
     55	close(client_fd);
     56
     57	err = bpf_map_lookup_elem(map_fd, &map_key, &map_value);
     58	if (CHECK_FAIL(err))
     59		goto close_bpf_object;
     60
     61	CHECK(map_value != 1, "bpf", "bpf program returned failure");
     62
     63close_bpf_object:
     64	bpf_object__close(obj);
     65
     66close_server_fd:
     67	close(server_fd);
     68
     69close_cgroup_fd:
     70	close(cgroup_fd);
     71}