1/*-
2 * Copyright (c) 2020 Alfredo Dal'Ava Junior <alfredo@freebsd.org>
3 * Copyright (c) 2017 Enji Cooper <ngie@freebsd.org>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * From: FreeBSD: src/lib/libkvm/tests/kvm_geterr_test.c
27 */
28
29#include <sys/param.h>
30#include <sys/sysctl.h>
31#include <errno.h>
32#include <fcntl.h>
33#include <kvm.h>
34#include <limits.h>
35#include <signal.h>
36#include <stdio.h>
37#include <stdlib.h>
38
39#include <atf-c.h>
40
41#include "kvm_test_common.h"
42
43ATF_TC(kvm_read_positive_test_no_error);
44ATF_TC_HEAD(kvm_read_positive_test_no_error, tc)
45{
46
47	atf_tc_set_md_var(tc, "descr",
48	    "test that kvm_read returns a sane value");
49	atf_tc_set_md_var(tc, "require.user", "root");
50}
51
52ATF_TC_BODY(kvm_read_positive_test_no_error, tc)
53{
54	kvm_t *kd;
55	struct nlist nl[] = {
56#define	SYMNAME	"_mp_maxcpus"
57#define	X_MAXCPUS	0
58		{ SYMNAME, 0, 0, 0, 0 },
59		{ NULL, 0, 0, 0, 0 },
60	};
61	ssize_t rc;
62	int sysctl_maxcpus, mp_maxcpus, retcode;
63	size_t len = sizeof(sysctl_maxcpus);
64
65	errbuf_clear();
66	kd = kvm_open(NULL, NULL, NULL, O_RDONLY, errbuf);
67	ATF_CHECK(!errbuf_has_error(errbuf));
68	ATF_REQUIRE_MSG(kd != NULL, "kvm_open failed: %s", errbuf);
69	retcode = kvm_nlist(kd, nl);
70	ATF_REQUIRE_MSG(retcode != -1,
71	    "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd));
72	if (nl[X_MAXCPUS].n_type == 0)
73		atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME);
74
75	rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus,
76	    sizeof(mp_maxcpus));
77
78	ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd));
79	ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s",
80	    strerror(errno));
81
82	/* Check if value read from kvm_read is sane */
83        retcode = sysctlbyname("kern.smp.maxcpus", &sysctl_maxcpus, &len, NULL, 0);
84	ATF_REQUIRE_MSG(retcode == 0, "sysctl read failed : %d", retcode);
85	ATF_REQUIRE_EQ_MSG(mp_maxcpus, sysctl_maxcpus,
86	    "failed: kvm_read of mp_maxcpus returned %d but sysctl maxcpus returned %d",
87	    mp_maxcpus, sysctl_maxcpus);
88}
89
90ATF_TP_ADD_TCS(tp)
91{
92
93	ATF_TP_ADD_TC(tp, kvm_read_positive_test_no_error);
94	return (atf_no_error());
95}
96