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 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/sysctl.h> 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <kvm.h> 37 #include <limits.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 42 #include <atf-c.h> 43 44 #include "kvm_test_common.h" 45 46 ATF_TC(kvm_read_positive_test_no_error); 47 ATF_TC_HEAD(kvm_read_positive_test_no_error, tc) 48 { 49 50 atf_tc_set_md_var(tc, "descr", 51 "test that kvm_read returns a sane value"); 52 atf_tc_set_md_var(tc, "require.user", "root"); 53 } 54 55 ATF_TC_BODY(kvm_read_positive_test_no_error, tc) 56 { 57 kvm_t *kd; 58 struct nlist nl[] = { 59 #define SYMNAME "_mp_maxcpus" 60 #define X_MAXCPUS 0 61 { SYMNAME, 0, 0, 0, 0 }, 62 { NULL, 0, 0, 0, 0 }, 63 }; 64 ssize_t rc; 65 int sysctl_maxcpus, mp_maxcpus, retcode; 66 size_t len = sizeof(sysctl_maxcpus); 67 68 errbuf_clear(); 69 kd = kvm_open(NULL, NULL, NULL, O_RDONLY, errbuf); 70 ATF_CHECK(!errbuf_has_error(errbuf)); 71 ATF_REQUIRE_MSG(kd != NULL, "kvm_open failed: %s", errbuf); 72 retcode = kvm_nlist(kd, nl); 73 ATF_REQUIRE_MSG(retcode != -1, 74 "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd)); 75 if (nl[X_MAXCPUS].n_type == 0) 76 atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME); 77 78 rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus, 79 sizeof(mp_maxcpus)); 80 81 ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd)); 82 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 83 strerror(errno)); 84 85 /* Check if value read from kvm_read is sane */ 86 retcode = sysctlbyname("kern.smp.maxcpus", &sysctl_maxcpus, &len, NULL, 0); 87 ATF_REQUIRE_MSG(retcode == 0, "sysctl read failed : %d", retcode); 88 ATF_REQUIRE_EQ_MSG(mp_maxcpus, sysctl_maxcpus, 89 "failed: kvm_read of mp_maxcpus returned %d but sysctl maxcpus returned %d", 90 mp_maxcpus, sysctl_maxcpus); 91 } 92 93 ATF_TP_ADD_TCS(tp) 94 { 95 96 ATF_TP_ADD_TC(tp, kvm_read_positive_test_no_error); 97 return (atf_no_error()); 98 } 99