1 /*
2 * Copyright (c) 2013 Oracle and/or its affiliates. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Author: Alexey Kodanev <alexey.kodanev@oracle.com>
19 */
20
21 #include <stdio.h>
22 #include <stdlib.h>
23
24 #include "test.h"
25 #include "old_module.h"
26 #include "safe_macros.h"
27
28 #include "ltp_acpi.h"
29
30 char *TCID = "ltp_acpi";
31 int TST_TOTAL = ACPI_TC_NUM;
32
33 static const char dev_result[] = "/sys/devices/" ACPI_TEST_NAME "/result";
34 static const char dev_path[] = "/sys/devices/" ACPI_TEST_NAME "/path";
35 static const char dev_str[] = "/sys/devices/" ACPI_TEST_NAME "/str";
36 static const char dev_tcase[] = "/sys/devices/" ACPI_TEST_NAME "/tcase";
37 static const char dev_acpi_disabled[] = "/sys/devices/" ACPI_TEST_NAME "/acpi_disabled";
38 static const char module_name[] = "ltp_acpi_cmds.ko";
39 static int module_loaded;
40
cleanup(void)41 static void cleanup(void)
42 {
43 if (module_loaded)
44 tst_module_unload(NULL, module_name);
45 }
46
read_sysfs_file(const char * name,char * buf,int size)47 static int read_sysfs_file(const char *name, char *buf, int size)
48 {
49 FILE *f = SAFE_FOPEN(cleanup, name, "r");
50 char *res = fgets(buf, size, f);
51 SAFE_FCLOSE(cleanup, f);
52 return (res) ? 0 : 1;
53 }
54
tc_acpi_str(void)55 static int tc_acpi_str(void)
56 {
57 int res, ret = 0;
58 char descr[4096], sysfs_path[4096];
59
60 int not_kver_3_7 = tst_kvercmp(3, 7, 0) < 0;
61
62 while (1) {
63
64 SAFE_FILE_PRINTF(cleanup, dev_tcase, "%d", ACPI_TRAVERSE);
65 SAFE_FILE_SCANF(cleanup, dev_result, "%d", &res);
66 if (res)
67 return TFAIL;
68 /*
69 * if device has _STR object, we should get
70 * a valid string from 'str' sysfs file and then can
71 * find it in sysfs.
72 */
73 if (read_sysfs_file(dev_str, descr, 4096)) {
74 /* None of left devices has _STR */
75 break;
76 }
77 tst_resm(TINFO, "read description %s", descr);
78
79 /* device's sysfs path */
80 strcpy(sysfs_path, "/sys");
81 if (read_sysfs_file(dev_path, sysfs_path + 4, 4092)) {
82 /*
83 * Device doesn't have sysfs entry
84 * continue, because others might have it
85 */
86 continue;
87 }
88
89 /*
90 * Find device description in sysfs.
91 *
92 * New sysfs interface to export device description
93 * implemented since Linux 3.7
94 */
95 if (not_kver_3_7) {
96 tst_resm(TINFO, "sysfs _STR check required Linux 3.7+");
97 ret = TCONF;
98 /* continue, we can still traverse ACPI devices */
99 continue;
100 }
101
102 strcat(sysfs_path, "/description");
103 if (access(sysfs_path, R_OK)) {
104 tst_resm(TINFO, "can't find description file '%s'",
105 sysfs_path);
106 return TFAIL;
107 }
108 tst_resm(TINFO, "found description file '%s'", sysfs_path);
109
110 char sysfs_descr[4096];
111 if (read_sysfs_file(sysfs_path, sysfs_descr, 4096))
112 return TFAIL;
113
114 /*
115 * Compare sysfs file and description from test driver
116 */
117 int res = strncmp(descr, sysfs_descr, strlen(descr));
118
119 ret |= res ? TFAIL : TPASS;
120 }
121
122 return ret;
123 }
124
test_run(void)125 static void test_run(void)
126 {
127 int i, res;
128
129 for (i = 0; i < TST_TOTAL; ++i) {
130
131 if (i == ACPI_TRAVERSE) {
132 res = tc_acpi_str();
133 } else {
134 SAFE_FILE_PRINTF(cleanup, dev_tcase, "%d", i);
135 SAFE_FILE_SCANF(cleanup, dev_result, "%d", &res);
136 res = res ? TFAIL : TPASS;
137 }
138
139 tst_resm(res, "Test-case '%d'", i);
140 }
141 }
142
main(int argc,char * argv[])143 int main(int argc, char *argv[])
144 {
145 int acpi_disabled;
146
147 tst_parse_opts(argc, argv, NULL, NULL);
148
149 tst_require_root();
150
151 if (tst_kvercmp(2, 6, 0) < 0) {
152 tst_brkm(TCONF, NULL,
153 "Test must be run with kernel 2.6 or newer");
154 }
155
156 tst_sig(FORK, DEF_HANDLER, cleanup);
157
158 tst_module_load(NULL, module_name, NULL);
159 module_loaded = 1;
160
161 SAFE_FILE_SCANF(cleanup, dev_acpi_disabled, "%d", &acpi_disabled);
162 if (acpi_disabled)
163 tst_brkm(TCONF, cleanup, "ACPI is disabled on the system");
164
165 test_run();
166
167 cleanup();
168
169 tst_exit();
170 }
171