// SPDX-License-Identifier: GPL-2.0 /* * Watchdog Driver Test Program * - Tests all ioctls * - Tests Magic Close - CONFIG_WATCHDOG_NOWAYOUT * - Could be tested against softdog driver on systems that * don't have watchdog hardware. * - TODO: * - Enhance test to add coverage for WDIOC_GETTEMP. * * Reference: Documentation/watchdog/watchdog-api.rst
*/
/* * This function simply sends an IOCTL to the driver, which in turn ticks * the PC Watchdog card to reset its internal timer so it doesn't trigger * a computer reset.
*/ staticvoid keep_alive(void)
{ int dummy; int ret;
ret = ioctl(fd, WDIOC_KEEPALIVE, &dummy); if (!ret)
printf(".");
}
/* * The main program. Run the program with "-d" to disable the card, * or "-e" to enable the card.
*/
staticvoid term(int sig)
{ int ret = write(fd, &v, 1);
staticvoid usage(char *progname)
{
printf("Usage: %s [options]\n", progname);
printf(" -f, --file\t\tOpen watchdog device file\n");
printf("\t\t\tDefault is /dev/watchdog\n");
printf(" -i, --info\t\tShow watchdog_info\n");
printf(" -s, --status\t\tGet status & supported features\n");
printf(" -b, --bootstatus\tGet last boot status (Watchdog/POR)\n");
printf(" -d, --disable\t\tTurn off the watchdog timer\n");
printf(" -e, --enable\t\tTurn on the watchdog timer\n");
printf(" -h, --help\t\tPrint the help message\n");
printf(" -p, --pingrate=P\tSet ping rate to P seconds (default %d)\n",
DEFAULT_PING_RATE);
printf(" -t, --timeout=T\tSet timeout to T seconds\n");
printf(" -T, --gettimeout\tGet the timeout\n");
printf(" -n, --pretimeout=T\tSet the pretimeout to T seconds\n");
printf(" -N, --getpretimeout\tGet the pretimeout\n");
printf(" -L, --gettimeleft\tGet the time left until timer expires\n");
printf("\n");
printf("Parameters are parsed left-to-right in real-time.\n");
printf("Example: %s -d -t 10 -p 5 -e\n", progname);
printf("Example: %s -t 12 -T -n 7 -N\n", progname);
}
struct wdiof_status { int flag; constchar *status_str;
};
#define WDIOF_NUM_STATUS 8
staticconststruct wdiof_status wdiof_status[WDIOF_NUM_STATUS] = {
{WDIOF_SETTIMEOUT, "Set timeout (in seconds)"},
{WDIOF_MAGICCLOSE, "Supports magic close char"},
{WDIOF_PRETIMEOUT, "Pretimeout (in seconds), get/set"},
{WDIOF_ALARMONLY, "Watchdog triggers a management or other external alarm not a reboot"},
{WDIOF_KEEPALIVEPING, "Keep alive ping reply"},
{WDIOS_DISABLECARD, "Turn off the watchdog timer"},
{WDIOS_ENABLECARD, "Turn on the watchdog timer"},
{WDIOS_TEMPPANIC, "Kernel panic on temperature trip"},
};
staticvoid print_status(int flags)
{ int wdiof = 0;
if (flags == WDIOS_UNKNOWN) {
printf("Unknown status error from WDIOC_GETSTATUS\n"); return;
}
for (wdiof = 0; wdiof < WDIOF_NUM_STATUS; wdiof++) { if (flags & wdiof_status[wdiof].flag)
printf("Support/Status: %s\n",
wdiof_status[wdiof].status_str);
}
}
#define WDIOF_NUM_BOOTSTATUS 7
staticconststruct wdiof_status wdiof_bootstatus[WDIOF_NUM_BOOTSTATUS] = {
{WDIOF_OVERHEAT, "Reset due to CPU overheat"},
{WDIOF_FANFAULT, "Fan failed"},
{WDIOF_EXTERN1, "External relay 1"},
{WDIOF_EXTERN2, "External relay 2"},
{WDIOF_POWERUNDER, "Power bad/power fault"},
{WDIOF_CARDRESET, "Card previously reset the CPU"},
{WDIOF_POWEROVER, "Power over voltage"},
};
staticvoid print_boot_status(int flags)
{ int wdiof = 0;
if (flags == WDIOF_UNKNOWN) {
printf("Unknown flag error from WDIOC_GETBOOTSTATUS\n"); return;
}
if (flags == 0) {
printf("Last boot is caused by: Power-On-Reset\n"); return;
}
for (wdiof = 0; wdiof < WDIOF_NUM_BOOTSTATUS; wdiof++) { if (flags & wdiof_bootstatus[wdiof].flag)
printf("Last boot is caused by: %s\n",
wdiof_bootstatus[wdiof].status_str);
}
}
int main(int argc, char *argv[])
{ int flags; unsignedint ping_rate = DEFAULT_PING_RATE; int ret; int c; int oneshot = 0; char *file = "/dev/watchdog"; struct watchdog_info info; int temperature;
setbuf(stdout, NULL);
while ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) { if (c == 'f')
file = optarg;
}
fd = open(file, O_WRONLY);
if (fd == -1) { if (errno == ENOENT)
printf("Watchdog device (%s) not found.\n", file); elseif (errno == EACCES)
printf("Run watchdog as root.\n"); else
printf("Watchdog device open failed %s\n",
strerror(errno)); exit(-1);
}
/* * Validate that `file` is a watchdog device
*/
ret = ioctl(fd, WDIOC_GETSUPPORT, &info); if (ret) {
printf("WDIOC_GETSUPPORT error '%s'\n", strerror(errno));
close(fd); exit(ret);
}
optind = 0;
while ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) { switch (c) { case'b':
flags = 0;
oneshot = 1;
ret = ioctl(fd, WDIOC_GETBOOTSTATUS, &flags); if (!ret)
print_boot_status(flags); else
printf("WDIOC_GETBOOTSTATUS error '%s'\n", strerror(errno)); break; case'd':
flags = WDIOS_DISABLECARD;
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags); if (!ret)
printf("Watchdog card disabled.\n"); else {
printf("WDIOS_DISABLECARD error '%s'\n", strerror(errno));
oneshot = 1;
} break; case'e':
flags = WDIOS_ENABLECARD;
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags); if (!ret)
printf("Watchdog card enabled.\n"); else {
printf("WDIOS_ENABLECARD error '%s'\n", strerror(errno));
oneshot = 1;
} break; case'p':
ping_rate = strtoul(optarg, NULL, 0); if (!ping_rate)
ping_rate = DEFAULT_PING_RATE;
printf("Watchdog ping rate set to %u seconds.\n", ping_rate); break; case's':
flags = 0;
oneshot = 1;
ret = ioctl(fd, WDIOC_GETSTATUS, &flags); if (!ret)
print_status(flags); else
printf("WDIOC_GETSTATUS error '%s'\n", strerror(errno));
ret = ioctl(fd, WDIOC_GETTEMP, &temperature); if (ret)
printf("WDIOC_GETTEMP: '%s'\n", strerror(errno)); else
printf("Temperature %d\n", temperature);
break; case't':
flags = strtoul(optarg, NULL, 0);
ret = ioctl(fd, WDIOC_SETTIMEOUT, &flags); if (!ret)
printf("Watchdog timeout set to %u seconds.\n", flags); else {
printf("WDIOC_SETTIMEOUT error '%s'\n", strerror(errno));
oneshot = 1;
} break; case'T':
oneshot = 1;
ret = ioctl(fd, WDIOC_GETTIMEOUT, &flags); if (!ret)
printf("WDIOC_GETTIMEOUT returns %u seconds.\n", flags); else
printf("WDIOC_GETTIMEOUT error '%s'\n", strerror(errno)); break; case'n':
flags = strtoul(optarg, NULL, 0);
ret = ioctl(fd, WDIOC_SETPRETIMEOUT, &flags); if (!ret)
printf("Watchdog pretimeout set to %u seconds.\n", flags); else {
printf("WDIOC_SETPRETIMEOUT error '%s'\n", strerror(errno));
oneshot = 1;
} break; case'N':
oneshot = 1;
ret = ioctl(fd, WDIOC_GETPRETIMEOUT, &flags); if (!ret)
printf("WDIOC_GETPRETIMEOUT returns %u seconds.\n", flags); else
printf("WDIOC_GETPRETIMEOUT error '%s'\n", strerror(errno)); break; case'L':
oneshot = 1;
ret = ioctl(fd, WDIOC_GETTIMELEFT, &flags); if (!ret)
printf("WDIOC_GETTIMELEFT returns %u seconds.\n", flags); else
printf("WDIOC_GETTIMELEFT error '%s'\n", strerror(errno)); break; case'f': /* Handled above */ break; case'i': /* * watchdog_info was obtained as part of file open * validation. So we just show it here.
*/
oneshot = 1;
printf("watchdog_info:\n");
printf(" identity:\t\t%s\n", info.identity);
printf(" firmware_version:\t%u\n",
info.firmware_version);
print_status(info.options); break;
default:
usage(argv[0]); goto end;
}
}
if (oneshot) goto end;
/* Check if WDIOF_KEEPALIVEPING is supported */ if (!(info.options & WDIOF_KEEPALIVEPING)) {
printf("WDIOC_KEEPALIVE not supported by this device\n"); goto end;
}
while (1) {
keep_alive();
sleep(ping_rate);
}
end: /* * Send specific magic character 'V' just in case Magic Close is * enabled to ensure watchdog gets disabled on close.
*/
ret = write(fd, &v, 1); if (ret < 0)
printf("Stopping watchdog ticks failed (%d)...\n", errno);
close(fd); return 0;
}
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