75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2022 Linutronix GmbH */
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#include <test_progs.h>
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#include <network_helpers.h>
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#include "test_time_tai.skel.h"
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#include <time.h>
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#include <stdint.h>
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#define TAI_THRESHOLD 1000000000ULL /* 1s */
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#define NSEC_PER_SEC 1000000000ULL
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static __u64 ts_to_ns(const struct timespec *ts)
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{
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return ts->tv_sec * NSEC_PER_SEC + ts->tv_nsec;
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}
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void test_time_tai(void)
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{
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struct __sk_buff skb = {
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.cb[0] = 0,
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.cb[1] = 0,
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.tstamp = 0,
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};
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LIBBPF_OPTS(bpf_test_run_opts, topts,
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.data_in = &pkt_v4,
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.data_size_in = sizeof(pkt_v4),
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.ctx_in = &skb,
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.ctx_size_in = sizeof(skb),
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.ctx_out = &skb,
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.ctx_size_out = sizeof(skb),
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);
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struct test_time_tai *skel;
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struct timespec now_tai;
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__u64 ts1, ts2, now;
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int ret, prog_fd;
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/* Open and load */
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skel = test_time_tai__open_and_load();
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if (!ASSERT_OK_PTR(skel, "tai_open"))
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return;
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/* Run test program */
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prog_fd = bpf_program__fd(skel->progs.time_tai);
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ret = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(ret, "test_run");
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/* Retrieve generated TAI timestamps */
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ts1 = skb.tstamp;
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ts2 = skb.cb[0] | ((__u64)skb.cb[1] << 32);
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/* TAI != 0 */
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ASSERT_NEQ(ts1, 0, "tai_ts1");
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ASSERT_NEQ(ts2, 0, "tai_ts2");
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/* TAI is moving forward only */
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ASSERT_GE(ts2, ts1, "tai_forward");
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/* Check for future */
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ret = clock_gettime(CLOCK_TAI, &now_tai);
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ASSERT_EQ(ret, 0, "tai_gettime");
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now = ts_to_ns(&now_tai);
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ASSERT_TRUE(now > ts1, "tai_future_ts1");
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ASSERT_TRUE(now > ts2, "tai_future_ts2");
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/* Check for reasonable range */
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ASSERT_TRUE(now - ts1 < TAI_THRESHOLD, "tai_range_ts1");
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ASSERT_TRUE(now - ts2 < TAI_THRESHOLD, "tai_range_ts2");
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test_time_tai__destroy(skel);
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}
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