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/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/sysctl.h> 32 #include <errno.h> 33 #include <fcntl.h> 34 #include <kvm.h> 35 #include <limits.h> 36 #include <signal.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 40 #include <atf-c.h> 41 42 #include "kvm_test_common.h" 43 44 ATF_TC(kvm_read_positive_test_no_error); 45 ATF_TC_HEAD(kvm_read_positive_test_no_error, tc) 46 { 47 48 atf_tc_set_md_var(tc, "descr", 49 "test that kvm_read returns a sane value"); 50 atf_tc_set_md_var(tc, "require.user", "root"); 51 } 52 53 ATF_TC_BODY(kvm_read_positive_test_no_error, tc) 54 { 55 kvm_t *kd; 56 struct nlist nl[] = { 57 #define SYMNAME "_mp_maxcpus" 58 #define X_MAXCPUS 0 59 { SYMNAME, 0, 0, 0, 0 }, 60 { NULL, 0, 0, 0, 0 }, 61 }; 62 ssize_t rc; 63 int sysctl_maxcpus, mp_maxcpus, retcode; 64 size_t len = sizeof(sysctl_maxcpus); 65 66 errbuf_clear(); 67 kd = kvm_open(NULL, NULL, NULL, O_RDONLY, errbuf); 68 ATF_CHECK(!errbuf_has_error(errbuf)); 69 ATF_REQUIRE_MSG(kd != NULL, "kvm_open failed: %s", errbuf); 70 retcode = kvm_nlist(kd, nl); 71 ATF_REQUIRE_MSG(retcode != -1, 72 "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd)); 73 if (nl[X_MAXCPUS].n_type == 0) 74 atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME); 75 76 rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus, 77 sizeof(mp_maxcpus)); 78 79 ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd)); 80 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 81 strerror(errno)); 82 83 /* Check if value read from kvm_read is sane */ 84 retcode = sysctlbyname("kern.smp.maxcpus", &sysctl_maxcpus, &len, NULL, 0); 85 ATF_REQUIRE_MSG(retcode == 0, "sysctl read failed : %d", retcode); 86 ATF_REQUIRE_EQ_MSG(mp_maxcpus, sysctl_maxcpus, 87 "failed: kvm_read of mp_maxcpus returned %d but sysctl maxcpus returned %d", 88 mp_maxcpus, sysctl_maxcpus); 89 } 90 91 ATF_TP_ADD_TCS(tp) 92 { 93 94 ATF_TP_ADD_TC(tp, kvm_read_positive_test_no_error); 95 return (atf_no_error()); 96 } 97