From: Andrei Vagin avagin@gmail.com
Check that timerfd_create takes into account clock offsets.
Cc: linux-kselftest@vger.kernel.org Signed-off-by: Andrei Vagin avagin@openvz.org Signed-off-by: Dmitry Safonov dima@arista.com --- tools/testing/selftests/timens/.gitignore | 1 + tools/testing/selftests/timens/Makefile | 2 +- tools/testing/selftests/timens/timerfd.c | 96 +++++++++++++++++++++++++++++++ 3 files changed, 98 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/timens/timerfd.c
diff --git a/tools/testing/selftests/timens/.gitignore b/tools/testing/selftests/timens/.gitignore index 27a693229ce1..b609f6ee9fb9 100644 --- a/tools/testing/selftests/timens/.gitignore +++ b/tools/testing/selftests/timens/.gitignore @@ -1 +1,2 @@ timens +timerfd diff --git a/tools/testing/selftests/timens/Makefile b/tools/testing/selftests/timens/Makefile index b877efb78974..66b90cd28e5c 100644 --- a/tools/testing/selftests/timens/Makefile +++ b/tools/testing/selftests/timens/Makefile @@ -1,4 +1,4 @@ -TEST_GEN_PROGS := timens +TEST_GEN_PROGS := timens timerfd
CFLAGS := -Wall -Werror
diff --git a/tools/testing/selftests/timens/timerfd.c b/tools/testing/selftests/timens/timerfd.c new file mode 100644 index 000000000000..914a4cd9a0df --- /dev/null +++ b/tools/testing/selftests/timens/timerfd.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include <sched.h> + +#include <sys/timerfd.h> +#include <sys/syscall.h> +#include <time.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <stdint.h> + +#include "log.h" + +#ifndef CLONE_NEWTIME +# define CLONE_NEWTIME 0x00001000 +#endif + +int run_test(int clockid) +{ + struct itimerspec new_value; + struct timespec now; + long long elapsed; + int fd, i; + + if (clock_gettime(clockid, &now)) + return pr_perror("clock_gettime"); + + for (i = 0; i < 2; i++) { + int flags = 0; + + pr_msg("timerfd_settime: %d", "INFO", clockid); + new_value.it_value.tv_sec = 3600; + new_value.it_value.tv_nsec = 0; + new_value.it_interval.tv_sec = 1; + new_value.it_interval.tv_nsec = 0; + + if (i == 1) { + new_value.it_value.tv_sec += now.tv_sec; + new_value.it_value.tv_nsec += now.tv_nsec; + } + + fd = timerfd_create(clockid, 0); + if (fd == -1) + return pr_perror("timerfd_create"); + + if (i == 1) + flags |= TFD_TIMER_ABSTIME; + + if (timerfd_settime(fd, flags, &new_value, NULL)) + return pr_perror("timerfd_settime"); + + if (timerfd_gettime(fd, &new_value)) + return pr_perror("timerfd_gettime"); + + elapsed = new_value.it_value.tv_sec; + if (abs(elapsed - 3600) > 60) { + printf("FAIL\n"); + return 1; + } + + close(fd); + } + + printf("PASS\n"); + + return 0; +} + +int main(int argc, char *argv[]) +{ + struct timespec tp; + int ret; + + if (unshare(CLONE_NEWTIME)) + return pr_perror("unshare"); + + if (clock_gettime(CLOCK_MONOTONIC, &tp)) + return pr_perror("clock_gettime"); + tp.tv_sec = 7 * 24 * 3600; + if (clock_settime(CLOCK_MONOTONIC, &tp)) + return pr_perror("clock_settime"); + + if (clock_gettime(CLOCK_BOOTTIME, &tp)) + return pr_perror("clock_gettime"); + tp.tv_sec += 9 * 24 * 3600; + tp.tv_nsec = 0; + if (clock_settime(CLOCK_BOOTTIME, &tp)) + return pr_perror("clock_settime"); + + ret = 0; + ret |= run_test(CLOCK_BOOTTIME); + ret |= run_test(CLOCK_MONOTONIC); + return ret; +} +