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
k_helper2_init(prop_dictionary_t props)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
k_helper2_fini(void * arg)86 k_helper2_fini(void *arg)
87 {
88
89 sysctl_teardown(&clogp);
90
91 return 0;
92 }
93
94 static
95 int
k_helper2_modcmd(modcmd_t cmd,void * arg)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