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k_helper.c
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Editing: k_helper.c
/* $NetBSD: k_helper.c,v 1.6 2012/06/03 10:59:44 dsl Exp $ */ /* * Copyright (c) 2008 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: k_helper.c,v 1.6 2012/06/03 10:59:44 dsl Exp $"); #include <sys/param.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/sysctl.h> #include <prop/proplib.h> MODULE(MODULE_CLASS_MISC, k_helper, NULL); /* --------------------------------------------------------------------- */ /* Sysctl interface to query information about the module. */ /* --------------------------------------------------------------------- */ /* TODO: Change the integer variables below that represent booleans to * bools, once sysctl(8) supports CTLTYPE_BOOL nodes. */ static struct sysctllog *clogp; static int present = 1; static int prop_str_ok; static char prop_str_val[128]; static int prop_int_ok; static int64_t prop_int_val; static int prop_int_load; #define K_HELPER 0x12345678 #define K_HELPER_PRESENT 0 #define K_HELPER_PROP_STR_OK 1 #define K_HELPER_PROP_STR_VAL 2 #define K_HELPER_PROP_INT_OK 3 #define K_HELPER_PROP_INT_VAL 4 #define K_HELPER_PROP_INT_LOAD 5 SYSCTL_SETUP(sysctl_k_helper_setup, "sysctl k_helper subtree setup") { sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "k_helper", NULL, NULL, 0, NULL, 0, CTL_VENDOR, K_HELPER, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "present", SYSCTL_DESCR("Whether the module was loaded or not"), NULL, 0, &present, 0, CTL_VENDOR, K_HELPER, K_HELPER_PRESENT, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "prop_str_ok", SYSCTL_DESCR("String property's validity"), NULL, 0, &prop_str_ok, 0, CTL_VENDOR, K_HELPER, K_HELPER_PROP_STR_OK, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "prop_str_val", SYSCTL_DESCR("String property's value"), NULL, 0, prop_str_val, 0, CTL_VENDOR, K_HELPER, K_HELPER_PROP_STR_VAL, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "prop_int_ok", SYSCTL_DESCR("String property's validity"), NULL, 0, &prop_int_ok, 0, CTL_VENDOR, K_HELPER, K_HELPER_PROP_INT_OK, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_QUAD, "prop_int_val", SYSCTL_DESCR("String property's value"), NULL, 0, &prop_int_val, 0, CTL_VENDOR, K_HELPER, K_HELPER_PROP_INT_VAL, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "prop_int_load", SYSCTL_DESCR("Status of recursive modload"), NULL, 0, &prop_int_load, 0, CTL_VENDOR, K_HELPER, K_HELPER_PROP_INT_LOAD, CTL_EOL); } /* --------------------------------------------------------------------- */ /* Module management. */ /* --------------------------------------------------------------------- */ static int k_helper_init(prop_dictionary_t props) { prop_object_t p; p = prop_dictionary_get(props, "prop_str"); if (p == NULL) prop_str_ok = 0; else if (prop_object_type(p) != PROP_TYPE_STRING) prop_str_ok = 0; else { const char *msg = prop_string_cstring_nocopy(p); if (msg == NULL) prop_str_ok = 0; else { strlcpy(prop_str_val, msg, sizeof(prop_str_val)); prop_str_ok = 1; } } if (!prop_str_ok) strlcpy(prop_str_val, "", sizeof(prop_str_val)); p = prop_dictionary_get(props, "prop_int"); if (p == NULL) prop_int_ok = 0; else if (prop_object_type(p) != PROP_TYPE_NUMBER) prop_int_ok = 0; else { prop_int_val = prop_number_integer_value(p); prop_int_ok = 1; } if (!prop_int_ok) prop_int_val = -1; p = prop_dictionary_get(props, "prop_recurse"); if (p != NULL && prop_object_type(p) == PROP_TYPE_STRING) { const char *recurse_name = prop_string_cstring_nocopy(p); if (recurse_name != NULL) prop_int_load = module_load(recurse_name, MODCTL_NO_PROP, NULL, MODULE_CLASS_ANY); else prop_int_load = -1; } else prop_int_load = -2; sysctl_k_helper_setup(&clogp); return 0; } static int k_helper_fini(void *arg) { sysctl_teardown(&clogp); return 0; } static int k_helper_modcmd(modcmd_t cmd, void *arg) { int ret; switch (cmd) { case MODULE_CMD_INIT: ret = k_helper_init(arg); break; case MODULE_CMD_FINI: ret = k_helper_fini(arg); break; case MODULE_CMD_STAT: default: ret = ENOTTY; } return ret; }
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