tests/modules/k_helper2/k_helper2.c

   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 }