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: Shuah Khan skhan@linuxfoundation.org --- .../selftests/watchdog/watchdog-test.c | 58 ++++++++++++++++++- 1 file changed, 55 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index f45e510500c0..5db9ad8b543c 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -1,6 +1,17 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Watchdog Driver Test Program +* 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 hadrware. +* - 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);