1 /* valid adjtimex test
2 * by: John Stultz <john.stultz@linaro.org>
3 * (C) Copyright Linaro 2015
4 * Licensed under the GPLv2
5 *
6 * This test validates adjtimex interface with valid
7 * and invalid test data.
8 *
9 * Usage: valid-adjtimex
10 *
11 * To build:
12 * $ gcc valid-adjtimex.c -o valid-adjtimex -lrt
13 *
14 * This program is free software: you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation, either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 */
24
25
26
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <time.h>
30 #include <sys/time.h>
31 #include <sys/timex.h>
32 #include <string.h>
33 #include <signal.h>
34 #include <unistd.h>
35 #include "../kselftest.h"
36
37 #define NSEC_PER_SEC 1000000000LL
38 #define USEC_PER_SEC 1000000LL
39
40 #define ADJ_SETOFFSET 0x0100
41
42 #ifndef __ANDROID__
43 #include <sys/syscall.h>
clock_adjtime(clockid_t id,struct timex * tx)44 static int clock_adjtime(clockid_t id, struct timex *tx)
45 {
46 return syscall(__NR_clock_adjtime, id, tx);
47 }
48 #endif
49
50 /* clear NTP time_status & time_state */
clear_time_state(void)51 int clear_time_state(void)
52 {
53 struct timex tx;
54 int ret;
55
56 tx.modes = ADJ_STATUS;
57 tx.status = 0;
58 ret = adjtimex(&tx);
59 return ret;
60 }
61
62 #define NUM_FREQ_VALID 32
63 #define NUM_FREQ_OUTOFRANGE 4
64 #define NUM_FREQ_INVALID 2
65
66 long valid_freq[NUM_FREQ_VALID] = {
67 -499<<16,
68 -450<<16,
69 -400<<16,
70 -350<<16,
71 -300<<16,
72 -250<<16,
73 -200<<16,
74 -150<<16,
75 -100<<16,
76 -75<<16,
77 -50<<16,
78 -25<<16,
79 -10<<16,
80 -5<<16,
81 -1<<16,
82 -1000,
83 1<<16,
84 5<<16,
85 10<<16,
86 25<<16,
87 50<<16,
88 75<<16,
89 100<<16,
90 150<<16,
91 200<<16,
92 250<<16,
93 300<<16,
94 350<<16,
95 400<<16,
96 450<<16,
97 499<<16,
98 };
99
100 long outofrange_freq[NUM_FREQ_OUTOFRANGE] = {
101 -1000<<16,
102 -550<<16,
103 550<<16,
104 1000<<16,
105 };
106
107 #define LONG_MAX (~0UL>>1)
108 #define LONG_MIN (-LONG_MAX - 1)
109
110 long invalid_freq[NUM_FREQ_INVALID] = {
111 LONG_MAX,
112 LONG_MIN,
113 };
114
validate_freq(void)115 int validate_freq(void)
116 {
117 struct timex tx;
118 int ret, pass = 0;
119 int i;
120
121 clear_time_state();
122
123 memset(&tx, 0, sizeof(struct timex));
124 /* Set the leap second insert flag */
125
126 printf("Testing ADJ_FREQ... ");
127 for (i = 0; i < NUM_FREQ_VALID; i++) {
128 tx.modes = ADJ_FREQUENCY;
129 tx.freq = valid_freq[i];
130
131 ret = adjtimex(&tx);
132 if (ret < 0) {
133 printf("[FAIL]\n");
134 printf("Error: adjtimex(ADJ_FREQ, %ld - %ld ppm\n",
135 valid_freq[i], valid_freq[i]>>16);
136 pass = -1;
137 goto out;
138 }
139 tx.modes = 0;
140 ret = adjtimex(&tx);
141 if (tx.freq != valid_freq[i]) {
142 printf("Warning: freq value %ld not what we set it (%ld)!\n",
143 tx.freq, valid_freq[i]);
144 }
145 }
146 for (i = 0; i < NUM_FREQ_OUTOFRANGE; i++) {
147 tx.modes = ADJ_FREQUENCY;
148 tx.freq = outofrange_freq[i];
149
150 ret = adjtimex(&tx);
151 if (ret < 0) {
152 printf("[FAIL]\n");
153 printf("Error: adjtimex(ADJ_FREQ, %ld - %ld ppm\n",
154 outofrange_freq[i], outofrange_freq[i]>>16);
155 pass = -1;
156 goto out;
157 }
158 tx.modes = 0;
159 ret = adjtimex(&tx);
160 if (tx.freq == outofrange_freq[i]) {
161 printf("[FAIL]\n");
162 printf("ERROR: out of range value %ld actually set!\n",
163 tx.freq);
164 pass = -1;
165 goto out;
166 }
167 }
168
169
170 if (sizeof(long) == 8) { /* this case only applies to 64bit systems */
171 for (i = 0; i < NUM_FREQ_INVALID; i++) {
172 tx.modes = ADJ_FREQUENCY;
173 tx.freq = invalid_freq[i];
174 ret = adjtimex(&tx);
175 if (ret >= 0) {
176 printf("[FAIL]\n");
177 printf("Error: No failure on invalid ADJ_FREQUENCY %ld\n",
178 invalid_freq[i]);
179 pass = -1;
180 goto out;
181 }
182 }
183 }
184
185 printf("[OK]\n");
186 out:
187 /* reset freq to zero */
188 tx.modes = ADJ_FREQUENCY;
189 tx.freq = 0;
190 ret = adjtimex(&tx);
191
192 return pass;
193 }
194
195
set_offset(long long offset,int use_nano)196 int set_offset(long long offset, int use_nano)
197 {
198 struct timex tmx = {};
199 int ret;
200
201 tmx.modes = ADJ_SETOFFSET;
202 if (use_nano) {
203 tmx.modes |= ADJ_NANO;
204
205 tmx.time.tv_sec = offset / NSEC_PER_SEC;
206 tmx.time.tv_usec = offset % NSEC_PER_SEC;
207
208 if (offset < 0 && tmx.time.tv_usec) {
209 tmx.time.tv_sec -= 1;
210 tmx.time.tv_usec += NSEC_PER_SEC;
211 }
212 } else {
213 tmx.time.tv_sec = offset / USEC_PER_SEC;
214 tmx.time.tv_usec = offset % USEC_PER_SEC;
215
216 if (offset < 0 && tmx.time.tv_usec) {
217 tmx.time.tv_sec -= 1;
218 tmx.time.tv_usec += USEC_PER_SEC;
219 }
220 }
221
222 ret = clock_adjtime(CLOCK_REALTIME, &tmx);
223 if (ret < 0) {
224 printf("(sec: %ld usec: %ld) ", tmx.time.tv_sec, tmx.time.tv_usec);
225 printf("[FAIL]\n");
226 return -1;
227 }
228 return 0;
229 }
230
set_bad_offset(long sec,long usec,int use_nano)231 int set_bad_offset(long sec, long usec, int use_nano)
232 {
233 struct timex tmx = {};
234 int ret;
235
236 tmx.modes = ADJ_SETOFFSET;
237 if (use_nano)
238 tmx.modes |= ADJ_NANO;
239
240 tmx.time.tv_sec = sec;
241 tmx.time.tv_usec = usec;
242 ret = clock_adjtime(CLOCK_REALTIME, &tmx);
243 if (ret >= 0) {
244 printf("Invalid (sec: %ld usec: %ld) did not fail! ", tmx.time.tv_sec, tmx.time.tv_usec);
245 printf("[FAIL]\n");
246 return -1;
247 }
248 return 0;
249 }
250
validate_set_offset(void)251 int validate_set_offset(void)
252 {
253 printf("Testing ADJ_SETOFFSET... ");
254
255 /* Test valid values */
256 if (set_offset(NSEC_PER_SEC - 1, 1))
257 return -1;
258
259 if (set_offset(-NSEC_PER_SEC + 1, 1))
260 return -1;
261
262 if (set_offset(-NSEC_PER_SEC - 1, 1))
263 return -1;
264
265 if (set_offset(5 * NSEC_PER_SEC, 1))
266 return -1;
267
268 if (set_offset(-5 * NSEC_PER_SEC, 1))
269 return -1;
270
271 if (set_offset(5 * NSEC_PER_SEC + NSEC_PER_SEC / 2, 1))
272 return -1;
273
274 if (set_offset(-5 * NSEC_PER_SEC - NSEC_PER_SEC / 2, 1))
275 return -1;
276
277 if (set_offset(USEC_PER_SEC - 1, 0))
278 return -1;
279
280 if (set_offset(-USEC_PER_SEC + 1, 0))
281 return -1;
282
283 if (set_offset(-USEC_PER_SEC - 1, 0))
284 return -1;
285
286 if (set_offset(5 * USEC_PER_SEC, 0))
287 return -1;
288
289 if (set_offset(-5 * USEC_PER_SEC, 0))
290 return -1;
291
292 if (set_offset(5 * USEC_PER_SEC + USEC_PER_SEC / 2, 0))
293 return -1;
294
295 if (set_offset(-5 * USEC_PER_SEC - USEC_PER_SEC / 2, 0))
296 return -1;
297
298 /* Test invalid values */
299 if (set_bad_offset(0, -1, 1))
300 return -1;
301 if (set_bad_offset(0, -1, 0))
302 return -1;
303 if (set_bad_offset(0, 2 * NSEC_PER_SEC, 1))
304 return -1;
305 if (set_bad_offset(0, 2 * USEC_PER_SEC, 0))
306 return -1;
307 if (set_bad_offset(0, NSEC_PER_SEC, 1))
308 return -1;
309 if (set_bad_offset(0, USEC_PER_SEC, 0))
310 return -1;
311 if (set_bad_offset(0, -NSEC_PER_SEC, 1))
312 return -1;
313 if (set_bad_offset(0, -USEC_PER_SEC, 0))
314 return -1;
315
316 printf("[OK]\n");
317 return 0;
318 }
319
main(int argc,char ** argv)320 int main(int argc, char **argv)
321 {
322 if (validate_freq())
323 return ksft_exit_fail();
324
325 if (validate_set_offset())
326 return ksft_exit_fail();
327
328 return ksft_exit_pass();
329 }
330