Commit 66d1dce0 authored by Shuah Khan's avatar Shuah Khan
Browse files

selftests/watchdog: change to print reset reason info. 



The test prints reset reason when WDIOC_GETBOOTSTATUS returns
a 0 flag value and all other cases simply say watchdog.

Parse the flag values returned by WDIOC_GETBOOTSTATUS and print
corresponding reset reason for each WDIOF_* boot status.

Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
parent de3ee3f6

tools/testing/selftests/watchdog/watchdog-test.c

+55 −3
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

* Watchdog Driver Test Program

* - Tests all ioctls except WDIOC_GETTEMP

* - Tests Magic Close - CONFIG_WATCHDOG_NOWAYOUT

* - Could be tested against softdog driver on systems that

*   don't have watchdog hardware.

* - TODO:

* - WDIOC_GETSTATUS is called when WDIOC_GETBOOTSTATUS is called.

* - Enhance the logic to call WDIOC_GETSTATUS and test return values.

* - Enhance coverage of ioctl return values - flags and status.

* - Enhance test to add coverage for WDIOC_GETTEMP.

*

* Reference: Documentation/watchdog/watchdog-api.rst

 */



#include <errno.h>
@@ -91,6 +102,44 @@ static void usage(char *progname) 
	printf("Example: %s -t 12 -T -n 7 -N\n", progname);

}



struct wdiof_status {

	int flag;

	const char *status_str;

};



#define WDIOF_NUM_BOOTSTATUS 7



static const struct 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"},

};



static void 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;
@@ -140,8 +189,7 @@ int main(int argc, char *argv[]) 
			oneshot = 1;

			ret = ioctl(fd, WDIOC_GETBOOTSTATUS, &flags);

			if (!ret)

				printf("Last boot is caused by: %s.\n", (flags != 0) ?

					"Watchdog" : "Power-On-Reset");

				print_boot_status(flags);

			else

				printf("WDIOC_GETBOOTSTATUS error '%s'\n", strerror(errno));

			break;
@@ -249,6 +297,10 @@ int main(int argc, char *argv[]) 
		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);