tests/rump/rumpkern/t_modcmd.c

   1 /*      $NetBSD: t_modcmd.c,v 1.9 2010/05/31 23:51:28 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  * We verify that modules can be loaded and unloaded.
  52  * tmpfs was chosen because it does not depend on an image.
  53  */
  54
  55 ATF_TC(cmsg_modcmd);
  56 ATF_TC_HEAD(cmsg_modcmd, tc)
  57 {
  58         atf_tc_set_md_var(tc, "descr", "Checks that loading and unloading "
  59             "a module (vfs/tmpfs) is possible");
  60 }
  61
  62 static int
  63 disable_autoload(void)
  64 {
  65         struct sysctlnode q, ans[256];
  66         int mib[3];
  67         size_t alen;
  68         unsigned i;
  69         bool no;
  70
  71         mib[0] = CTL_KERN;
  72         mib[1] = CTL_QUERY;
  73         alen = sizeof(ans);
  74
  75         memset(&q, 0, sizeof(q));
  76         q.sysctl_flags = SYSCTL_VERSION;
  77
  78         if (rump_sys___sysctl(mib, 2, ans, &alen, &q, sizeof(q)) == -1)
  79                 return -1;
  80
  81         for (i = 0; i < __arraycount(ans); i++)
  82                 if (strcmp("module", ans[i].sysctl_name) == 0)
  83                         break;
  84         if (i == __arraycount(ans)) {
  85                 errno = ENOENT;
  86                 return -1;
  87         }
  88
  89         mib[1] = ans[i].sysctl_num;
  90         mib[2] = CTL_QUERY;
  91
  92         if (rump_sys___sysctl(mib, 3, ans, &alen, &q, sizeof(q)) == -1)
  93                 return errno;
  94
  95         for (i = 0; i < __arraycount(ans); i++)
  96                 if (strcmp("autoload", ans[i].sysctl_name) == 0)
  97                         break;
  98         if (i == __arraycount(ans)) {
  99                 errno = ENOENT;
 100                 return -1;
 101         }
 102
 103         mib[2] = ans[i].sysctl_num;
 104
 105         no = false;
 106         alen = 0;
 107         if (rump_sys___sysctl(mib, 3, NULL, &alen, &no, sizeof(no)) == -1)
 108                 return errno;
 109
 110         return 0;
 111
 112 }
 113
 114 #define TMPFSMODULE "librumpfs_tmpfs.so"
 115 ATF_TC_BODY(cmsg_modcmd, tc)
 116 {
 117         struct tmpfs_args args;
 118         const struct modinfo *const *mi_start, *const *mi_end;
 119         void *handle;
 120         int i, rv, loop = 0;
 121
 122         rump_init();
 123
 124         if (disable_autoload() == -1)
 125                 atf_tc_fail_errno("count not disable module autoload");
 126
 127         memset(&args, 0, sizeof(args));
 128         args.ta_version = TMPFS_ARGS_VERSION;
 129         args.ta_root_mode = 0777;
 130
 131         if (rump_sys_mkdir("/mp", 0777) == -1)
 132                 atf_tc_fail_errno("mkdir mountpoint");
 133         if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) != -1)
 134                 atf_tc_fail("mount unexpectedly succeeded");
 135
 136         handle = dlopen(TMPFSMODULE, RTLD_GLOBAL);
 137         if (handle == NULL) {
 138                 const char *dlmsg = dlerror();
 139                 atf_tc_fail("cannot open %s: %s", TMPFSMODULE, dlmsg);
 140         }
 141
 142  again:
 143         mi_start = dlsym(handle, "__start_link_set_modules");
 144         mi_end = dlsym(handle, "__stop_link_set_modules");
 145         if (mi_start == NULL || mi_end == NULL)
 146                 atf_tc_fail("cannot find module info");
 147         if ((rv = rump_pub_module_init(mi_start, (size_t)(mi_end-mi_start)))!=0)
 148                 atf_tc_fail("module init failed: %d (%s)", rv, strerror(rv));
 149         if ((rv = rump_pub_module_init(mi_start, (size_t)(mi_end-mi_start)))==0)
 150                 atf_tc_fail("module double init succeeded");
 151
 152         if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) == -1)
 153                 atf_tc_fail_errno("still cannot mount");
 154         if (rump_sys_unmount("/mp", 0) == -1)
 155                 atf_tc_fail("cannot unmount");
 156         for (i = 0; i < (int)(mi_end-mi_start); i++) {
 157                 if ((rv = rump_pub_module_fini(mi_start[i])) != 0)
 158                         atf_tc_fail("module fini failed: %d (%s)",
 159                             rv, strerror(rv));
 160         }
 161         for (i = 0; i < (int)(mi_end-mi_start); i++) {
 162                 if ((rv = rump_pub_module_fini(mi_start[i])) == 0)
 163                         atf_tc_fail("module double fini succeeded");
 164         }
 165         if (loop++ == 0)
 166                 goto again;
 167
 168         if (dlclose(handle)) {
 169                 const char *dlmsg = dlerror();
 170                 atf_tc_fail("cannot close %s: %s", TMPFSMODULE, dlmsg);
 171         }
 172
 173         if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) != -1)
 174                 atf_tc_fail("mount unexpectedly succeeded");
 175 }
 176
 177 ATF_TP_ADD_TCS(tp)
 178 {
 179         ATF_TP_ADD_TC(tp, cmsg_modcmd);
 180
 181         return atf_no_error();
 182 }