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