/*      $NetBSD: t_builtin.c,v 1.5 2020/02/22 00:18:55 kamil Exp $      */

/*-
* Copyright (c) 2010 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/module.h>
#include <sys/mount.h>

#include <atf-c.h>
#include <fcntl.h>
#include <stdbool.h>

#include <miscfs/kernfs/kernfs.h>

#include <rump/rump.h>
#include <rump/rump_syscalls.h>

#include "h_macros.h"

#define MYMP "/mnt"
#define HZFILE MYMP "/hz"

static char kernfs[] = "kernfs";

static bool
check_kernfs(void)
{
       char buf[16];
       bool rv = true;
       int fd;

       fd = rump_sys_open(HZFILE, O_RDONLY);
       if (fd == -1)
               return false;
       if (rump_sys_read(fd, buf, sizeof(buf)) < 1)
               rv = false;
       RL(rump_sys_close(fd));

       return rv;
}

ATF_TC(disable);
ATF_TC_HEAD(disable, tc)
{

       atf_tc_set_md_var(tc, "descr", "Tests that builtin modules can "
           "be disabled");
}

ATF_TC_BODY(disable, tc)
{

       rump_init();
       RL(rump_sys_mkdir(MYMP, 0777));
       RL(rump_sys_mount(MOUNT_KERNFS, MYMP, 0, NULL, 0));
       ATF_REQUIRE(check_kernfs());
       RL(rump_sys_unmount(MYMP, 0));
       RL(rump_sys_modctl(MODCTL_UNLOAD, kernfs));
}

ATF_TC(noauto);
ATF_TC_HEAD(noauto, tc)
{
       atf_tc_set_md_var(tc, "descr", "Tests that disabled builtin modules "
           "will not autoload");
}

ATF_TC_BODY(noauto, tc)
{

       rump_init();
       RL(rump_sys_mkdir(MYMP, 0777));

       RL(rump_sys_modctl(MODCTL_UNLOAD, kernfs));

       ATF_REQUIRE_ERRNO(ENODEV,
           rump_sys_mount(MOUNT_KERNFS, MYMP, 0, NULL, 0) == -1);
}

ATF_TC(forcereload);
ATF_TC_HEAD(forcereload, tc)
{
       atf_tc_set_md_var(tc, "descr", "Tests that disabled builtin modules "
           "can be force-reloaded");
}

ATF_TC_BODY(forcereload, tc)
{
       struct modctl_load mod;

       rump_init();
       RL(rump_sys_mkdir(MYMP, 0777));

       RL(rump_sys_modctl(MODCTL_UNLOAD, kernfs));
       ATF_REQUIRE_ERRNO(ENODEV,
           rump_sys_mount(MOUNT_KERNFS, MYMP, 0, NULL, 0) == -1);

       memset(&mod, 0, sizeof(mod));
       mod.ml_filename = kernfs;
       mod.ml_flags = MODCTL_LOAD_FORCE;

       RL(rump_sys_modctl(MODCTL_LOAD, &mod));

       RL(rump_sys_mount(MOUNT_KERNFS, MYMP, 0, NULL, 0));
       ATF_REQUIRE(check_kernfs());
       RL(rump_sys_unmount(MYMP, 0));
}

ATF_TC(disabledstat);
ATF_TC_HEAD(disabledstat, tc)
{
       atf_tc_set_md_var(tc, "descr", "Tests that disabled builtin modules "
           "show up in modstat with refcount -1");
}

ATF_TC_BODY(disabledstat, tc)
{
       modstat_t *ms;
       modstat_t m;
       struct iovec iov;
       size_t len;
       int count;
       bool found = false;

       rump_init();
       RL(rump_sys_mkdir(MYMP, 0777));

       RL(rump_sys_modctl(MODCTL_UNLOAD, kernfs));

       for (len = 8192; ;) {
               iov.iov_base = malloc(len);
               iov.iov_len = len;

               errno = 0;

               if (rump_sys_modctl(MODCTL_STAT, &iov) != 0) {
                       int err = errno;
                       fprintf(stderr, "modctl(MODCTL_STAT) failed: %s\n",
                           strerror(err));
                       atf_tc_fail("Failed to query module status");
               }
               if (len >= iov.iov_len)
                       break;
               free(iov.iov_base);
               len = iov.iov_len;
       }

       count = *(int *)iov.iov_base;
       ms = (modstat_t *)((char *)iov.iov_base + sizeof(int));
       while ( count ) {
               memcpy(&m, ms, sizeof(m));
               if (strcmp(m.ms_name, kernfs) == 0) {
                       ATF_REQUIRE_EQ(m.ms_refcnt, (u_int)-1);
                       found = true;
                       break;
               }
               ms++;
               count--;

       }
       ATF_REQUIRE(found);
}

ATF_TC(busydisable);
ATF_TC_HEAD(busydisable, tc)
{
       atf_tc_set_md_var(tc, "descr", "Tests that busy builtin modules "
           "cannot be disabled");
}

ATF_TC_BODY(busydisable, tc)
{

       rump_init();
       RL(rump_sys_mkdir(MYMP, 0777));
       RL(rump_sys_mount(MOUNT_KERNFS, MYMP, 0, NULL, 0));
       ATF_REQUIRE(check_kernfs());
       ATF_REQUIRE_ERRNO(EBUSY,
           rump_sys_modctl(MODCTL_UNLOAD, kernfs) == -1);
}

ATF_TP_ADD_TCS(tp)
{

       ATF_TP_ADD_TC(tp, disable);
       ATF_TP_ADD_TC(tp, noauto);
       ATF_TP_ADD_TC(tp, forcereload);
       ATF_TP_ADD_TC(tp, disabledstat);
       ATF_TP_ADD_TC(tp, busydisable);

       return atf_no_error();
}

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