t_modcmd.c revision 1.6 
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
56ATF_TC(cmsg_modcmd);
57ATF_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
63static int
64disable_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"
116ATF_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
178ATF_TP_ADD_TCS(tp)
179{
180	ATF_TP_ADD_TC(tp, cmsg_modcmd);
181
182	return atf_no_error();
183}
184