From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Safonov Subject: [PATCH 26/32] selftest/timens: Add a test for clock_nanosleep() Date: Wed, 6 Feb 2019 00:11:00 +0000 Message-ID: <20190206001107.16488-27-dima@arista.com> References: <20190206001107.16488-1-dima@arista.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190206001107.16488-1-dima@arista.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: Andrei Vagin , Dmitry Safonov , Adrian Reber , Andrei Vagin , Andy Lutomirski , Andy Tucker , Arnd Bergmann , Christian Brauner , Cyrill Gorcunov , Dmitry Safonov <0x7f454c46@gmail.com>, "Eric W. Biederman" , "H. Peter Anvin" , Ingo Molnar , Jeff Dike , Oleg Nesterov , Pavel Emelyanov , Shuah Khan , Thomas Gleixner , containers@lists.linux-foundation.org, criu@openvz.org, linux-api@vger.kernel.org, x86@kernel.org List-Id: linux-api@vger.kernel.org From: Andrei Vagin Check that clock_nanosleep() takes into account clock offsets. Signed-off-by: Andrei Vagin Signed-off-by: Dmitry Safonov --- tools/testing/selftests/timens/.gitignore | 1 + tools/testing/selftests/timens/Makefile | 2 +- .../selftests/timens/clock_nanosleep.c | 99 +++++++++++++++++++ 3 files changed, 101 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..9a1689e5a0e1 --- /dev/null +++ b/tools/testing/selftests/timens/clock_nanosleep.c @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "log.h" +#include "timens.h" + +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; + } + + 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("clockid: %d abs: %d elapsed: %lld\n", + clockid, i, elapsed); + return 1; + } + ksft_test_result_pass("clockid: %d abs:%d\n", clockid, i); + } + + return 0; +} + +int main(int argc, char *argv[]) +{ + int ret, nsfd; + + nscheck(); + + if (unshare(CLONE_NEWTIME)) + return pr_perror("unshare"); + + if (_settime(CLOCK_MONOTONIC, 7 * 24 * 3600)) + return 1; + if (_settime(CLOCK_BOOTTIME, 9 * 24 * 3600)) + return 1; + + nsfd = open("/proc/self/ns/time_for_children", O_RDONLY); + if (nsfd < 0) + return pr_perror("Unable to open timens_for_children"); + + if (setns(nsfd, CLONE_NEWTIME)) + return pr_perror("Unable to set timens"); + + ret = 0; + ret |= run_test(CLOCK_MONOTONIC); + + if (ret) + ksft_exit_fail(); + ksft_exit_pass(); + return ret; +} + -- 2.20.1