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
43 ATF_TC(kvm_read_positive_test_no_error);
ATF_TC_HEAD(kvm_read_positive_test_no_error,tc)44 ATF_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
ATF_TC_BODY(kvm_read_positive_test_no_error,tc)52 ATF_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
ATF_TP_ADD_TCS(tp)90 ATF_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