1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2022 Linutronix GmbH */
3
4 #include <test_progs.h>
5 #include <network_helpers.h>
6
7 #include "test_time_tai.skel.h"
8
9 #include <time.h>
10 #include <stdint.h>
11
12 #define TAI_THRESHOLD 1000000000ULL /* 1s */
13 #define NSEC_PER_SEC 1000000000ULL
14
15 static __u64 ts_to_ns(const struct timespec *ts)
16 {
17 return ts->tv_sec * NSEC_PER_SEC + ts->tv_nsec;
18 }
19
20 void test_time_tai(void)
21 {
22 struct __sk_buff skb = {
23 .cb[0] = 0,
24 .cb[1] = 0,
25 .tstamp = 0,
26 };
27 LIBBPF_OPTS(bpf_test_run_opts, topts,
28 .data_in = &pkt_v4,
29 .data_size_in = sizeof(pkt_v4),
30 .ctx_in = &skb,
31 .ctx_size_in = sizeof(skb),
32 .ctx_out = &skb,
33 .ctx_size_out = sizeof(skb),
34 );
35 struct test_time_tai *skel;
36 struct timespec now_tai;
37 __u64 ts1, ts2, now;
38 int ret, prog_fd;
39
40 /* Open and load */
41 skel = test_time_tai__open_and_load();
42 if (!ASSERT_OK_PTR(skel, "tai_open"))
43 return;
44
45 /* Run test program */
46 prog_fd = bpf_program__fd(skel->progs.time_tai);
47 ret = bpf_prog_test_run_opts(prog_fd, &topts);
48 ASSERT_OK(ret, "test_run");
49
50 /* Retrieve generated TAI timestamps */
51 ts1 = skb.tstamp;
52 ts2 = skb.cb[0] | ((__u64)skb.cb[1] << 32);
53
54 /* TAI != 0 */
55 ASSERT_NEQ(ts1, 0, "tai_ts1");
56 ASSERT_NEQ(ts2, 0, "tai_ts2");
57
58 /* TAI is moving forward only */
59 ASSERT_GE(ts2, ts1, "tai_forward");
60
61 /* Check for future */
62 ret = clock_gettime(CLOCK_TAI, &now_tai);
63 ASSERT_EQ(ret, 0, "tai_gettime");
64 now = ts_to_ns(&now_tai);
65
66 ASSERT_TRUE(now > ts1, "tai_future_ts1");
67 ASSERT_TRUE(now > ts2, "tai_future_ts2");
68
69 /* Check for reasonable range */
70 ASSERT_TRUE(now - ts1 < TAI_THRESHOLD, "tai_range_ts1");
71 ASSERT_TRUE(now - ts2 < TAI_THRESHOLD, "tai_range_ts2");
72
73 test_time_tai__destroy(skel);
74 }
75
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