diff options
Diffstat (limited to 'tools/testing/selftests/watchdog/watchdog-test.c')
| -rw-r--r-- | tools/testing/selftests/watchdog/watchdog-test.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c new file mode 100644 index 000000000..f45e51050 --- /dev/null +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Watchdog Driver Test Program + */ + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> +#include <signal.h> +#include <getopt.h> +#include <sys/ioctl.h> +#include <linux/types.h> +#include <linux/watchdog.h> + +#define DEFAULT_PING_RATE 1 + +int fd; +const char v = 'V'; +static const char sopts[] = "bdehp:t:Tn:NLf:i"; +static const struct option lopts[] = { + {"bootstatus", no_argument, NULL, 'b'}, + {"disable", no_argument, NULL, 'd'}, + {"enable", no_argument, NULL, 'e'}, + {"help", no_argument, NULL, 'h'}, + {"pingrate", required_argument, NULL, 'p'}, + {"timeout", required_argument, NULL, 't'}, + {"gettimeout", no_argument, NULL, 'T'}, + {"pretimeout", required_argument, NULL, 'n'}, + {"getpretimeout", no_argument, NULL, 'N'}, + {"gettimeleft", no_argument, NULL, 'L'}, + {"file", required_argument, NULL, 'f'}, + {"info", no_argument, NULL, 'i'}, + {NULL, no_argument, NULL, 0x0} +}; + +/* + * 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. + */ +static void 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. + */ + +static void term(int sig) +{ + int ret = write(fd, &v, 1); + + close(fd); + if (ret < 0) + printf("\nStopping watchdog ticks failed (%d)...\n", errno); + else + printf("\nStopping watchdog ticks...\n"); + exit(0); +} + +static void 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(" -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); +} + +int main(int argc, char *argv[]) +{ + int flags; + unsigned int ping_rate = DEFAULT_PING_RATE; + int ret; + int c; + int oneshot = 0; + char *file = "/dev/watchdog"; + struct watchdog_info info; + + 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); + else if (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) + printf("Last boot is caused by: %s.\n", (flags != 0) ? + "Watchdog" : "Power-On-Reset"); + 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 '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); + printf(" options:\t\t%08x\n", info.options); + break; + + default: + usage(argv[0]); + goto end; + } + } + + if (oneshot) + goto end; + + printf("Watchdog Ticking Away!\n"); + + signal(SIGINT, term); + + while (1) { + keep_alive(); + sleep(ping_rate); + } +end: + ret = write(fd, &v, 1); + if (ret < 0) + printf("Stopping watchdog ticks failed (%d)...\n", errno); + close(fd); + return 0; +} |