/*
* Copyright (c) 2013 Oracle and/or its affiliates. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author: Alexey Kodanev <alexey.kodanev@oracle.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include "test.h"
#include "old_module.h"
#include "safe_macros.h"
#include "ltp_acpi.h"
char *TCID = "ltp_acpi";
int TST_TOTAL = ACPI_TC_NUM;
static const char dev_result[] = "/sys/devices/" ACPI_TEST_NAME "/result";
static const char dev_path[] = "/sys/devices/" ACPI_TEST_NAME "/path";
static const char dev_str[] = "/sys/devices/" ACPI_TEST_NAME "/str";
static const char dev_tcase[] = "/sys/devices/" ACPI_TEST_NAME "/tcase";
static const char dev_acpi_disabled[] = "/sys/devices/" ACPI_TEST_NAME "/acpi_disabled";
static const char module_name[] = "ltp_acpi_cmds.ko";
static int module_loaded;
static void cleanup(void)
{
if (module_loaded)
tst_module_unload(NULL, module_name);
}
static int read_sysfs_file(const char *name, char *buf, int size)
{
FILE *f = SAFE_FOPEN(cleanup, name, "r");
char *res = fgets(buf, size, f);
SAFE_FCLOSE(cleanup, f);
return (res) ? 0 : 1;
}
static int tc_acpi_str(void)
{
int res, ret = 0;
char descr[4096], sysfs_path[4096];
int not_kver_3_7 = tst_kvercmp(3, 7, 0) < 0;
while (1) {
SAFE_FILE_PRINTF(cleanup, dev_tcase, "%d", ACPI_TRAVERSE);
SAFE_FILE_SCANF(cleanup, dev_result, "%d", &res);
if (res)
return TFAIL;
/*
* if device has _STR object, we should get
* a valid string from 'str' sysfs file and then can
* find it in sysfs.
*/
if (read_sysfs_file(dev_str, descr, 4096)) {
/* None of left devices has _STR */
break;
}
tst_resm(TINFO, "read description %s", descr);
/* device's sysfs path */
strcpy(sysfs_path, "/sys");
if (read_sysfs_file(dev_path, sysfs_path + 4, 4092)) {
/*
* Device doesn't have sysfs entry
* continue, because others might have it
*/
continue;
}
/*
* Find device description in sysfs.
*
* New sysfs interface to export device description
* implemented since Linux 3.7
*/
if (not_kver_3_7) {
tst_resm(TINFO, "sysfs _STR check required Linux 3.7+");
ret = TCONF;
/* continue, we can still traverse ACPI devices */
continue;
}
strcat(sysfs_path, "/description");
if (access(sysfs_path, R_OK)) {
tst_resm(TINFO, "can't find description file '%s'",
sysfs_path);
return TFAIL;
}
tst_resm(TINFO, "found description file '%s'", sysfs_path);
char sysfs_descr[4096];
if (read_sysfs_file(sysfs_path, sysfs_descr, 4096))
return TFAIL;
/*
* Compare sysfs file and description from test driver
*/
int res = strncmp(descr, sysfs_descr, strlen(descr));
ret |= res ? TFAIL : TPASS;
}
return ret;
}
static void test_run(void)
{
int i, res;
for (i = 0; i < TST_TOTAL; ++i) {
if (i == ACPI_TRAVERSE) {
res = tc_acpi_str();
} else {
SAFE_FILE_PRINTF(cleanup, dev_tcase, "%d", i);
SAFE_FILE_SCANF(cleanup, dev_result, "%d", &res);
res = res ? TFAIL : TPASS;
}
tst_resm(res, "Test-case '%d'", i);
}
}
int main(int argc, char *argv[])
{
int acpi_disabled;
tst_parse_opts(argc, argv, NULL, NULL);
tst_require_root();
if (tst_kvercmp(2, 6, 0) < 0) {
tst_brkm(TCONF, NULL,
"Test must be run with kernel 2.6 or newer");
}
tst_sig(FORK, DEF_HANDLER, cleanup);
tst_module_load(NULL, module_name, NULL);
module_loaded = 1;
SAFE_FILE_SCANF(cleanup, dev_acpi_disabled, "%d", &acpi_disabled);
if (acpi_disabled)
tst_brkm(TCONF, cleanup, "ACPI is disabled on the system");
test_run();
cleanup();
tst_exit();
}