1 /* $NetBSD: k_helper.c,v 1.6 2012/06/03 10:59:44 dsl Exp $ */ 2 /* 3 * Copyright (c) 2008 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_helper.c,v 1.6 2012/06/03 10:59:44 dsl 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_helper, 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 static int prop_str_ok; 51 static char prop_str_val[128]; 52 static int prop_int_ok; 53 static int64_t prop_int_val; 54 static int prop_int_load; 55 56 #define K_HELPER 0x12345678 57 #define K_HELPER_PRESENT 0 58 #define K_HELPER_PROP_STR_OK 1 59 #define K_HELPER_PROP_STR_VAL 2 60 #define K_HELPER_PROP_INT_OK 3 61 #define K_HELPER_PROP_INT_VAL 4 62 #define K_HELPER_PROP_INT_LOAD 5 63 64 SYSCTL_SETUP(sysctl_k_helper_setup, "sysctl k_helper subtree setup") 65 { 66 67 sysctl_createv(clog, 0, NULL, NULL, 68 CTLFLAG_PERMANENT, 69 CTLTYPE_NODE, "k_helper", NULL, 70 NULL, 0, NULL, 0, 71 CTL_VENDOR, K_HELPER, CTL_EOL); 72 73 sysctl_createv(clog, 0, NULL, NULL, 74 CTLFLAG_PERMANENT, 75 CTLTYPE_INT, "present", 76 SYSCTL_DESCR("Whether the module was loaded or not"), 77 NULL, 0, &present, 0, 78 CTL_VENDOR, K_HELPER, K_HELPER_PRESENT, CTL_EOL); 79 80 sysctl_createv(clog, 0, NULL, NULL, 81 CTLFLAG_PERMANENT, 82 CTLTYPE_INT, "prop_str_ok", 83 SYSCTL_DESCR("String property's validity"), 84 NULL, 0, &prop_str_ok, 0, 85 CTL_VENDOR, K_HELPER, K_HELPER_PROP_STR_OK, CTL_EOL); 86 87 sysctl_createv(clog, 0, NULL, NULL, 88 CTLFLAG_PERMANENT, 89 CTLTYPE_STRING, "prop_str_val", 90 SYSCTL_DESCR("String property's value"), 91 NULL, 0, prop_str_val, 0, 92 CTL_VENDOR, K_HELPER, K_HELPER_PROP_STR_VAL, CTL_EOL); 93 94 sysctl_createv(clog, 0, NULL, NULL, 95 CTLFLAG_PERMANENT, 96 CTLTYPE_INT, "prop_int_ok", 97 SYSCTL_DESCR("String property's validity"), 98 NULL, 0, &prop_int_ok, 0, 99 CTL_VENDOR, K_HELPER, K_HELPER_PROP_INT_OK, CTL_EOL); 100 101 sysctl_createv(clog, 0, NULL, NULL, 102 CTLFLAG_PERMANENT, 103 CTLTYPE_QUAD, "prop_int_val", 104 SYSCTL_DESCR("String property's value"), 105 NULL, 0, &prop_int_val, 0, 106 CTL_VENDOR, K_HELPER, K_HELPER_PROP_INT_VAL, CTL_EOL); 107 108 sysctl_createv(clog, 0, NULL, NULL, 109 CTLFLAG_PERMANENT, 110 CTLTYPE_INT, "prop_int_load", 111 SYSCTL_DESCR("Status of recursive modload"), 112 NULL, 0, &prop_int_load, 0, 113 CTL_VENDOR, K_HELPER, K_HELPER_PROP_INT_LOAD, CTL_EOL); 114 } 115 116 /* --------------------------------------------------------------------- */ 117 /* Module management. */ 118 /* --------------------------------------------------------------------- */ 119 120 static 121 int 122 k_helper_init(prop_dictionary_t props) 123 { 124 prop_object_t p; 125 126 p = prop_dictionary_get(props, "prop_str"); 127 if (p == NULL) 128 prop_str_ok = 0; 129 else if (prop_object_type(p) != PROP_TYPE_STRING) 130 prop_str_ok = 0; 131 else { 132 const char *msg = prop_string_cstring_nocopy(p); 133 if (msg == NULL) 134 prop_str_ok = 0; 135 else { 136 strlcpy(prop_str_val, msg, sizeof(prop_str_val)); 137 prop_str_ok = 1; 138 } 139 } 140 if (!prop_str_ok) 141 strlcpy(prop_str_val, "", sizeof(prop_str_val)); 142 143 p = prop_dictionary_get(props, "prop_int"); 144 if (p == NULL) 145 prop_int_ok = 0; 146 else if (prop_object_type(p) != PROP_TYPE_NUMBER) 147 prop_int_ok = 0; 148 else { 149 prop_int_val = prop_number_integer_value(p); 150 prop_int_ok = 1; 151 } 152 if (!prop_int_ok) 153 prop_int_val = -1; 154 155 p = prop_dictionary_get(props, "prop_recurse"); 156 if (p != NULL && prop_object_type(p) == PROP_TYPE_STRING) { 157 const char *recurse_name = prop_string_cstring_nocopy(p); 158 if (recurse_name != NULL) 159 prop_int_load = module_load(recurse_name, 160 MODCTL_NO_PROP, NULL, MODULE_CLASS_ANY); 161 else 162 prop_int_load = -1; 163 } else 164 prop_int_load = -2; 165 166 sysctl_k_helper_setup(&clogp); 167 168 return 0; 169 } 170 171 static 172 int 173 k_helper_fini(void *arg) 174 { 175 176 sysctl_teardown(&clogp); 177 178 return 0; 179 } 180 181 static 182 int 183 k_helper_modcmd(modcmd_t cmd, void *arg) 184 { 185 int ret; 186 187 switch (cmd) { 188 case MODULE_CMD_INIT: 189 ret = k_helper_init(arg); 190 break; 191 192 case MODULE_CMD_FINI: 193 ret = k_helper_fini(arg); 194 break; 195 196 case MODULE_CMD_STAT: 197 default: 198 ret = ENOTTY; 199 } 200 201 return ret; 202 } 203