1 /* $NetBSD: t_modcmd.c,v 1.6 2010/05/01 11:20:21 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/types.h> 31 #include <sys/mount.h> 32 #include <sys/sysctl.h> 33 34 #include <rump/rump.h> 35 #include <rump/rump_syscalls.h> 36 37 #include <fs/tmpfs/tmpfs_args.h> 38 39 #include <atf-c.h> 40 #include <dlfcn.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <util.h> 48 49 #include "../../h_macros.h" 50 51 /* 52 * We verify that modules can be loaded and unloaded. 53 * tmpfs was chosen because it does not depend on an image. 54 */ 55 56 ATF_TC(cmsg_modcmd); 57 ATF_TC_HEAD(cmsg_modcmd, tc) 58 { 59 atf_tc_set_md_var(tc, "descr", "Checks that loading and unloading " 60 "a module (vfs/tmpfs) is possible"); 61 } 62 63 static int 64 disable_autoload(void) 65 { 66 struct sysctlnode q, ans[256]; 67 int mib[3]; 68 size_t alen; 69 unsigned i; 70 bool no; 71 72 mib[0] = CTL_KERN; 73 mib[1] = CTL_QUERY; 74 alen = sizeof(ans); 75 76 memset(&q, 0, sizeof(q)); 77 q.sysctl_flags = SYSCTL_VERSION; 78 79 if (rump_sys___sysctl(mib, 2, ans, &alen, &q, sizeof(q)) == -1) 80 return -1; 81 82 for (i = 0; i < __arraycount(ans); i++) 83 if (strcmp("module", ans[i].sysctl_name) == 0) 84 break; 85 if (i == __arraycount(ans)) { 86 errno = ENOENT; 87 return -1; 88 } 89 90 mib[1] = ans[i].sysctl_num; 91 mib[2] = CTL_QUERY; 92 93 if (rump_sys___sysctl(mib, 3, ans, &alen, &q, sizeof(q)) == -1) 94 return errno; 95 96 for (i = 0; i < __arraycount(ans); i++) 97 if (strcmp("autoload", ans[i].sysctl_name) == 0) 98 break; 99 if (i == __arraycount(ans)) { 100 errno = ENOENT; 101 return -1; 102 } 103 104 mib[2] = ans[i].sysctl_num; 105 106 no = false; 107 alen = 0; 108 if (rump_sys___sysctl(mib, 3, NULL, &alen, &no, sizeof(no)) == -1) 109 return errno; 110 111 return 0; 112 113 } 114 115 #define TMPFSMODULE "librumpfs_tmpfs.so" 116 ATF_TC_BODY(cmsg_modcmd, tc) 117 { 118 struct tmpfs_args args; 119 const struct modinfo *const *mi_start, *const *mi_end; 120 void *handle; 121 int i, rv, loop = 0; 122 123 rump_init(); 124 125 if (disable_autoload() == -1) 126 atf_tc_fail_errno("count not disable module autoload"); 127 128 memset(&args, 0, sizeof(args)); 129 args.ta_version = TMPFS_ARGS_VERSION; 130 args.ta_root_mode = 0777; 131 132 if (rump_sys_mkdir("/mp", 0777) == -1) 133 atf_tc_fail_errno("mkdir mountpoint"); 134 if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) != -1) 135 atf_tc_fail("mount unexpectedly succeeded"); 136 137 handle = dlopen(TMPFSMODULE, RTLD_GLOBAL); 138 if (handle == NULL) { 139 const char *dlmsg = dlerror(); 140 atf_tc_fail("cannot open %s: %s", TMPFSMODULE, dlmsg); 141 } 142 143 again: 144 mi_start = dlsym(handle, "__start_link_set_modules"); 145 mi_end = dlsym(handle, "__stop_link_set_modules"); 146 if (mi_start == NULL || mi_end == NULL) 147 atf_tc_fail("cannot find module info"); 148 if ((rv = rump_pub_module_init(mi_start, (size_t)(mi_end-mi_start)))!=0) 149 atf_tc_fail("module init failed: %d (%s)", rv, strerror(rv)); 150 if ((rv = rump_pub_module_init(mi_start, (size_t)(mi_end-mi_start)))==0) 151 atf_tc_fail("module double init succeeded"); 152 153 if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) == -1) 154 atf_tc_fail_errno("still cannot mount"); 155 if (rump_sys_unmount("/mp", 0) == -1) 156 atf_tc_fail("cannot unmount"); 157 for (i = 0; i < (int)(mi_end-mi_start); i++) { 158 if ((rv = rump_pub_module_fini(mi_start[i])) != 0) 159 atf_tc_fail("module fini failed: %d (%s)", 160 rv, strerror(rv)); 161 } 162 for (i = 0; i < (int)(mi_end-mi_start); i++) { 163 if ((rv = rump_pub_module_fini(mi_start[i])) == 0) 164 atf_tc_fail("module double fini succeeded"); 165 } 166 if (loop++ == 0) 167 goto again; 168 169 if (dlclose(handle)) { 170 const char *dlmsg = dlerror(); 171 atf_tc_fail("cannot close %s: %s", TMPFSMODULE, dlmsg); 172 } 173 174 if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) != -1) 175 atf_tc_fail("mount unexpectedly succeeded"); 176 } 177 178 ATF_TP_ADD_TCS(tp) 179 { 180 ATF_TP_ADD_TC(tp, cmsg_modcmd); 181 182 return atf_no_error(); 183 } 184