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/* $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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