From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- tools/testing/selftests/watchdog/.gitignore | 1 + tools/testing/selftests/watchdog/Makefile | 4 + tools/testing/selftests/watchdog/watchdog-test.c | 167 +++++++++++++++++++++++ 3 files changed, 172 insertions(+) create mode 100644 tools/testing/selftests/watchdog/.gitignore create mode 100644 tools/testing/selftests/watchdog/Makefile create mode 100644 tools/testing/selftests/watchdog/watchdog-test.c (limited to 'tools/testing/selftests/watchdog') diff --git a/tools/testing/selftests/watchdog/.gitignore b/tools/testing/selftests/watchdog/.gitignore new file mode 100644 index 000000000..5aac51575 --- /dev/null +++ b/tools/testing/selftests/watchdog/.gitignore @@ -0,0 +1 @@ +watchdog-test diff --git a/tools/testing/selftests/watchdog/Makefile b/tools/testing/selftests/watchdog/Makefile new file mode 100644 index 000000000..6b5598b55 --- /dev/null +++ b/tools/testing/selftests/watchdog/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +TEST_GEN_PROGS := watchdog-test + +include ../lib.mk diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c new file mode 100644 index 000000000..f1c6e025c --- /dev/null +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Watchdog Driver Test Program + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DEFAULT_PING_RATE 1 + +int fd; +const char v = 'V'; +static const char sopts[] = "bdehp:t:"; +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'}, + {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(" -b, --bootstatus Get last boot status (Watchdog/POR)\n"); + printf(" -d, --disable Turn off the watchdog timer\n"); + printf(" -e, --enable Turn on the watchdog timer\n"); + printf(" -h, --help Print the help message\n"); + printf(" -p, --pingrate=P Set ping rate to P seconds (default %d)\n", DEFAULT_PING_RATE); + printf(" -t, --timeout=T Set timeout to T seconds\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); +} + +int main(int argc, char *argv[]) +{ + int flags; + unsigned int ping_rate = DEFAULT_PING_RATE; + int ret; + int c; + int oneshot = 0; + + setbuf(stdout, NULL); + + fd = open("/dev/watchdog", O_WRONLY); + + if (fd == -1) { + if (errno == ENOENT) + printf("Watchdog device not enabled.\n"); + else if (errno == EACCES) + printf("Run watchdog as root.\n"); + else + printf("Watchdog device open failed %s\n", + strerror(errno)); + exit(-1); + } + + 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)); + 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)); + 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)); + 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; +} -- cgit v1.2.3