From: Andrei Vagin avagin@gmail.com
Check that clock_nanosleep() 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/clock_nanosleep.c | 98 ++++++++++++++++++++++++ 3 files changed, 100 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/timens/clock_nanosleep.c
diff --git a/tools/testing/selftests/timens/.gitignore b/tools/testing/selftests/timens/.gitignore index b609f6ee9fb9..9b6c8ddac2c8 100644 --- a/tools/testing/selftests/timens/.gitignore +++ b/tools/testing/selftests/timens/.gitignore @@ -1,2 +1,3 @@ +clock_nanosleep timens timerfd diff --git a/tools/testing/selftests/timens/Makefile b/tools/testing/selftests/timens/Makefile index 66b90cd28e5c..76a1dc891184 100644 --- a/tools/testing/selftests/timens/Makefile +++ b/tools/testing/selftests/timens/Makefile @@ -1,4 +1,4 @@ -TEST_GEN_PROGS := timens timerfd +TEST_GEN_PROGS := timens timerfd clock_nanosleep
CFLAGS := -Wall -Werror
diff --git a/tools/testing/selftests/timens/clock_nanosleep.c b/tools/testing/selftests/timens/clock_nanosleep.c new file mode 100644 index 000000000000..5af780b4cfe0 --- /dev/null +++ b/tools/testing/selftests/timens/clock_nanosleep.c @@ -0,0 +1,98 @@ +#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 + +static long long get_elapsed_time(int clockid, struct timespec *start) +{ + struct timespec curr; + long long secs, nsecs; + + if (clock_gettime(clockid, &curr) == -1) + return pr_perror("clock_gettime"); + + secs = curr.tv_sec - start->tv_sec; + nsecs = curr.tv_nsec - start->tv_nsec; + if (nsecs < 0) { + secs--; + nsecs += 1000000000; + } + if (nsecs > 1000000000) { + secs++; + nsecs -= 1000000000; + } + return secs * 1000 + nsecs / 1000000; +} + +int run_test(int clockid) +{ + long long elapsed; + int i; + + for (i = 0; i < 2; i++) { + struct timespec now = {}; + struct timespec start; + + if (clock_gettime(clockid, &start) == -1) + return pr_perror("clock_gettime"); + + + if (i == 1) { + now.tv_sec = start.tv_sec; + now.tv_nsec = start.tv_nsec; + } + + printf("clock_nanosleep: %d\n", clockid); + now.tv_sec += 2; + clock_nanosleep(clockid, i ? TIMER_ABSTIME : 0, &now, NULL); + + elapsed = get_elapsed_time(clockid, &start); + if (elapsed < 1900 || elapsed > 2100) { + pr_fail("elapsed %lld\n", elapsed); + return 1; + } + } + + 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_MONOTONIC); + return ret; +} +