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 
25 ATF_TC(modautoload);
26 ATF_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 
33 static void
34 mountkernfs(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
68 ATF_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 
83 ATF_TP_ADD_TCS(tp)
84 {
85 	ATF_TP_ADD_TC(tp, modautoload);
86 
87 	return atf_no_error();
88 }
89