t_modcmd.c revision 314817 
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
55ATF_TC(cmsg_modcmd);
56ATF_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
62static int
63disable_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"
115ATF_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
177ATF_TP_ADD_TCS(tp)
178{
179	ATF_TP_ADD_TC(tp, cmsg_modcmd);
180
181	return atf_no_error();
182}
183