1 /* $NetBSD: t_modcmd.c,v 1.10 2017/01/13 21:30:43 christos 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);
ATF_TC_HEAD(cmsg_modcmd,tc)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
disable_autoload(void)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"
ATF_TC_BODY(cmsg_modcmd,tc)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
ATF_TP_ADD_TCS(tp)177 ATF_TP_ADD_TCS(tp)
178 {
179 ATF_TP_ADD_TC(tp, cmsg_modcmd);
180
181 return atf_no_error();
182 }
183