115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2019 Linaro Limited. All rights reserved.
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* Author: Rafael David Tinoco <rafael.tinoco@linaro.org>
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*/
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/*
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* Basic test for clock_settime(2) on REALTIME clock:
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*
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* 1) advance DELTA_SEC seconds
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* 2) go backwards DELTA_SEC seconds
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*
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* Restore wall clock at the end of test.
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*/
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#include "config.h"
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#include "time64_variants.h"
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#include "tst_timer.h"
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#include "tst_safe_clocks.h"
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#define DELTA_SEC 10
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#define DELTA_US (long long) (DELTA_SEC * 1000000)
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#define DELTA_EPS (long long) (DELTA_US * 0.1)
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static struct tst_ts *begin, *change, *end;
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static struct time64_variants variants[] = {
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{ .clock_gettime = libc_clock_gettime, .clock_settime = libc_clock_settime, .ts_type = TST_LIBC_TIMESPEC, .desc = "vDSO or syscall with libc spec"},
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#if (__NR_clock_settime != __LTP__NR_INVALID_SYSCALL)
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{ .clock_gettime = sys_clock_gettime, .clock_settime = sys_clock_settime, .ts_type = TST_KERN_OLD_TIMESPEC, .desc = "syscall with old kernel spec"},
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#endif
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#if (__NR_clock_settime64 != __LTP__NR_INVALID_SYSCALL)
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{ .clock_gettime = sys_clock_gettime64, .clock_settime = sys_clock_settime64, .ts_type = TST_KERN_TIMESPEC, .desc = "syscall time64 with kernel spec"},
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#endif
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};
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static void setup(void)
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{
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begin->type = change->type = end->type = variants[tst_variant].ts_type;
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tst_res(TINFO, "Testing variant: %s", variants[tst_variant].desc);
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}
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static void do_clock_gettime(struct time64_variants *tv, struct tst_ts *ts)
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{
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int ret;
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ret = tv->clock_gettime(CLOCK_REALTIME, tst_ts_get(ts));
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if (ret == -1)
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tst_brk(TBROK | TERRNO, "clock_settime(CLOCK_REALTIME) failed");
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}
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static void verify_clock_settime(void)
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{
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struct time64_variants *tv = &variants[tst_variant];
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long long elapsed;
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/* test 01: move forward */
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do_clock_gettime(tv, begin);
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*change = tst_ts_add_us(*begin, DELTA_US);
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TEST(tv->clock_settime(CLOCK_REALTIME, tst_ts_get(change)));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "clock_settime(2) failed for clock %s",
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tst_clock_name(CLOCK_REALTIME));
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return;
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}
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do_clock_gettime(tv, end);
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elapsed = tst_ts_diff_us(*end, *begin);
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if (elapsed >= DELTA_US && elapsed < (DELTA_US + DELTA_EPS))
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tst_res(TPASS, "clock_settime(2): was able to advance time");
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else
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tst_res(TFAIL, "clock_settime(2): could not advance time");
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/* test 02: move backward */
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do_clock_gettime(tv, begin);
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*change = tst_ts_sub_us(*begin, DELTA_US);
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TEST(tv->clock_settime(CLOCK_REALTIME, tst_ts_get(change)));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "clock_settime(2) failed for clock %s",
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tst_clock_name(CLOCK_REALTIME));
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return;
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}
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do_clock_gettime(tv, end);
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elapsed = tst_ts_diff_us(*end, *begin);
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if (~(elapsed) <= DELTA_US && ~(elapsed) > (DELTA_US - DELTA_EPS))
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tst_res(TPASS, "clock_settime(2): was able to recede time");
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else
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tst_res(TFAIL, "clock_settime(2): could not recede time");
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}
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static struct tst_test test = {
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.test_all = verify_clock_settime,
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.test_variants = ARRAY_SIZE(variants),
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.setup = setup,
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.needs_root = 1,
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.restore_wallclock = 1,
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.bufs = (struct tst_buffers []) {
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{&begin, .size = sizeof(*begin)},
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{&change, .size = sizeof(*change)},
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{&end, .size = sizeof(*end)},
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{},
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}
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};
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