1 /*	$NetBSD: k_helper2.c,v 1.2 2010/11/03 16:10:23 christos Exp $ */
2 /*
3  * Copyright (c) 2010 The NetBSD Foundation, Inc.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
16  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
22  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
24  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: k_helper2.c,v 1.2 2010/11/03 16:10:23 christos Exp $");
31 
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/sysctl.h>
36 
37 #include <prop/proplib.h>
38 
39 MODULE(MODULE_CLASS_MISC, k_helper2, NULL);
40 
41 /* --------------------------------------------------------------------- */
42 /* Sysctl interface to query information about the module.               */
43 /* --------------------------------------------------------------------- */
44 
45 /* TODO: Change the integer variables below that represent booleans to
46  * bools, once sysctl(8) supports CTLTYPE_BOOL nodes. */
47 
48 static struct sysctllog *clogp;
49 static int present = 1;
50 
51 #define K_HELPER2 0x23456781
52 #define K_HELPER_PRESENT 0
53 
54 SYSCTL_SETUP(sysctl_k_helper2_setup, "sysctl k_helper subtree setup")
55 {
56 
57 	sysctl_createv(clog, 0, NULL, NULL,
58 	               CTLFLAG_PERMANENT,
59 	               CTLTYPE_NODE, "k_helper2", NULL,
60 	               NULL, 0, NULL, 0,
61 	               CTL_VENDOR, K_HELPER2, CTL_EOL);
62 
63 	sysctl_createv(clog, 0, NULL, NULL,
64 	               CTLFLAG_PERMANENT,
65 	               CTLTYPE_INT, "present",
66 		       SYSCTL_DESCR("Whether the module was loaded or not"),
67 		       NULL, 0, &present, 0,
68 	               CTL_VENDOR, K_HELPER2, K_HELPER_PRESENT, CTL_EOL);
69 }
70 
71 /* --------------------------------------------------------------------- */
72 /* Module management.                                                    */
73 /* --------------------------------------------------------------------- */
74 
75 static
76 int
77 k_helper2_init(prop_dictionary_t props)
78 {
79 	sysctl_k_helper2_setup(&clogp);
80 
81 	return 0;
82 }
83 
84 static
85 int
86 k_helper2_fini(void *arg)
87 {
88 
89 	sysctl_teardown(&clogp);
90 
91 	return 0;
92 }
93 
94 static
95 int
96 k_helper2_modcmd(modcmd_t cmd, void *arg)
97 {
98 	int ret;
99 
100 	switch (cmd) {
101 	case MODULE_CMD_INIT:
102 		ret = k_helper2_init(arg);
103 		break;
104 
105 	case MODULE_CMD_FINI:
106 		ret = k_helper2_fini(arg);
107 		break;
108 
109 	case MODULE_CMD_STAT:
110 	default:
111 		ret = ENOTTY;
112 	}
113 
114 	return ret;
115 }
116