minix/tests/rump/rumpkern/t_modcmd.c

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/* $NetBSD: t_modcmd.c,v 1.9 2010/05/31 23:51:28 pooka Exp $ */
/*
* Copyright (c) 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <rump/rump.h>
#include <rump/rump_syscalls.h>
#include <fs/tmpfs/tmpfs_args.h>
#include <atf-c.h>
#include <dlfcn.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include "../../h_macros.h"
/*
* We verify that modules can be loaded and unloaded.
* tmpfs was chosen because it does not depend on an image.
*/
ATF_TC(cmsg_modcmd);
ATF_TC_HEAD(cmsg_modcmd, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks that loading and unloading "
"a module (vfs/tmpfs) is possible");
}
static int
disable_autoload(void)
{
struct sysctlnode q, ans[256];
int mib[3];
size_t alen;
unsigned i;
bool no;
mib[0] = CTL_KERN;
mib[1] = CTL_QUERY;
alen = sizeof(ans);
memset(&q, 0, sizeof(q));
q.sysctl_flags = SYSCTL_VERSION;
if (rump_sys___sysctl(mib, 2, ans, &alen, &q, sizeof(q)) == -1)
return -1;
for (i = 0; i < __arraycount(ans); i++)
if (strcmp("module", ans[i].sysctl_name) == 0)
break;
if (i == __arraycount(ans)) {
errno = ENOENT;
return -1;
}
mib[1] = ans[i].sysctl_num;
mib[2] = CTL_QUERY;
if (rump_sys___sysctl(mib, 3, ans, &alen, &q, sizeof(q)) == -1)
return errno;
for (i = 0; i < __arraycount(ans); i++)
if (strcmp("autoload", ans[i].sysctl_name) == 0)
break;
if (i == __arraycount(ans)) {
errno = ENOENT;
return -1;
}
mib[2] = ans[i].sysctl_num;
no = false;
alen = 0;
if (rump_sys___sysctl(mib, 3, NULL, &alen, &no, sizeof(no)) == -1)
return errno;
return 0;
}
#define TMPFSMODULE "librumpfs_tmpfs.so"
ATF_TC_BODY(cmsg_modcmd, tc)
{
struct tmpfs_args args;
const struct modinfo *const *mi_start, *const *mi_end;
void *handle;
int i, rv, loop = 0;
rump_init();
if (disable_autoload() == -1)
atf_tc_fail_errno("count not disable module autoload");
memset(&args, 0, sizeof(args));
args.ta_version = TMPFS_ARGS_VERSION;
args.ta_root_mode = 0777;
if (rump_sys_mkdir("/mp", 0777) == -1)
atf_tc_fail_errno("mkdir mountpoint");
if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) != -1)
atf_tc_fail("mount unexpectedly succeeded");
handle = dlopen(TMPFSMODULE, RTLD_GLOBAL);
if (handle == NULL) {
const char *dlmsg = dlerror();
atf_tc_fail("cannot open %s: %s", TMPFSMODULE, dlmsg);
}
again:
mi_start = dlsym(handle, "__start_link_set_modules");
mi_end = dlsym(handle, "__stop_link_set_modules");
if (mi_start == NULL || mi_end == NULL)
atf_tc_fail("cannot find module info");
if ((rv = rump_pub_module_init(mi_start, (size_t)(mi_end-mi_start)))!=0)
atf_tc_fail("module init failed: %d (%s)", rv, strerror(rv));
if ((rv = rump_pub_module_init(mi_start, (size_t)(mi_end-mi_start)))==0)
atf_tc_fail("module double init succeeded");
if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) == -1)
atf_tc_fail_errno("still cannot mount");
if (rump_sys_unmount("/mp", 0) == -1)
atf_tc_fail("cannot unmount");
for (i = 0; i < (int)(mi_end-mi_start); i++) {
if ((rv = rump_pub_module_fini(mi_start[i])) != 0)
atf_tc_fail("module fini failed: %d (%s)",
rv, strerror(rv));
}
for (i = 0; i < (int)(mi_end-mi_start); i++) {
if ((rv = rump_pub_module_fini(mi_start[i])) == 0)
atf_tc_fail("module double fini succeeded");
}
if (loop++ == 0)
goto again;
if (dlclose(handle)) {
const char *dlmsg = dlerror();
atf_tc_fail("cannot close %s: %s", TMPFSMODULE, dlmsg);
}
if (rump_sys_mount(MOUNT_TMPFS, "/mp", 0, &args, sizeof(args)) != -1)
atf_tc_fail("mount unexpectedly succeeded");
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, cmsg_modcmd);
return atf_no_error();
}