t_modautoload.c revision 314817 
1/*	$NetBSD: t_modautoload.c,v 1.6 2017/01/13 21:30:42 christos Exp $	*/
2
3#include <sys/types.h>
4#include <sys/mount.h>
5#include <sys/module.h>
6#include <sys/dirent.h>
7#include <sys/sysctl.h>
8
9#include <atf-c.h>
10#include <err.h>
11#include <errno.h>
12#include <fcntl.h>
13#include <stdio.h>
14#include <unistd.h>
15#include <string.h>
16#include <stdlib.h>
17
18#include <rump/rump.h>
19#include <rump/rump_syscalls.h>
20
21#include <miscfs/kernfs/kernfs.h>
22
23#include "h_macros.h"
24
25ATF_TC(modautoload);
26ATF_TC_HEAD(modautoload, tc)
27{
28
29	atf_tc_set_md_var(tc, "descr", "tests that kernel module "
30	    "autoload works in rump");
31}
32
33static void
34mountkernfs(void)
35{
36	bool old_autoload, new_autoload;
37	size_t old_len, new_len;
38	int error;
39
40	if (!rump_nativeabi_p())
41		atf_tc_skip("host kernel modules not supported");
42
43	rump_init();
44
45	if (rump_sys_mkdir("/kern", 0777) == -1)
46		atf_tc_fail_errno("mkdir /kern");
47
48	new_autoload = true;
49	old_len = sizeof(old_autoload);
50	new_len = sizeof(new_autoload);
51	error = sysctlbyname("kern.module.autoload",
52				  &old_autoload, &old_len,
53				  &new_autoload, new_len);
54	if (error != 0)
55		atf_tc_fail_errno("could not enable module autoload");
56
57	if (rump_sys_mount(MOUNT_KERNFS, "/kern", 0, NULL, 0) == -1)
58		atf_tc_fail_errno("could not mount kernfs");
59}
60
61/*
62 * Why use kernfs here?  It talks to plenty of other parts with the
63 * kernel (e.g. vfs_attach() in modcmd), but is still easy to verify
64 * it's working correctly.
65 */
66
67#define MAGICNUM 1323
68ATF_TC_BODY(modautoload, tc)
69{
70	extern int rumpns_hz;
71	char buf[64];
72	int fd;
73
74	mountkernfs();
75	rumpns_hz = MAGICNUM;
76	if ((fd = rump_sys_open("/kern/hz", O_RDONLY)) == -1)
77		atf_tc_fail_errno("open /kern/hz");
78	if (rump_sys_read(fd, buf, sizeof(buf)) <= 0)
79		atf_tc_fail_errno("read");
80	ATF_REQUIRE(atoi(buf) == MAGICNUM);
81}
82
83ATF_TP_ADD_TCS(tp)
84{
85	ATF_TP_ADD_TC(tp, modautoload);
86
87	return atf_no_error();
88}
89