tools/testing/selftests/timers/valid-adjtimex.c

   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 #ifdef KTEST
  36 #include "../kselftest.h"
  37 #else
  38 static inline int ksft_exit_pass(void)
  39 {
  40         exit(0);
  41 }
  42 static inline int ksft_exit_fail(void)
  43 {
  44         exit(1);
  45 }
  46 #endif
  47
  48 #define NSEC_PER_SEC 1000000000L
  49
  50 /* clear NTP time_status & time_state */
  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
 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
 196 int main(int argc, char **argv)
 197 {
 198         if (validate_freq())
 199                 return ksft_exit_fail();
 200
 201         return ksft_exit_pass();
 202 }