timekeeper_config/
timekeeper-config_rust_config_lib_source.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
use fidl::unpersist;
use fidl_cf_sc_internal_timekeeperconfig::Config as FidlConfig;
use fuchsia_inspect::Node;
use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
#[derive(Debug)]
pub struct Config {
    pub back_off_time_between_pull_samples_sec: i64,
    pub disable_delays: bool,
    pub early_exit: bool,
    pub first_sampling_delay_sec: i64,
    pub has_real_time_clock: bool,
    pub initial_frequency_ppm: u32,
    pub max_frequency_error_ppm: u32,
    pub monitor_time_source_url: String,
    pub monitor_uses_pull: bool,
    pub oscillator_error_std_dev_ppm: u32,
    pub power_topology_integration_enabled: bool,
    pub primary_time_source_url: String,
    pub primary_uses_pull: bool,
    pub serve_fuchsia_time_alarms: bool,
    pub serve_test_protocols: bool,
    pub utc_start_at_startup: bool,
    pub utc_start_at_startup_when_invalid_rtc: bool,
}
impl Config {
    pub fn take_from_startup_handle() -> Self {
        let config_vmo: zx::Vmo =
            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
                .expect("Config VMO handle must be provided and cannot already have been taken.")
                .into();
        let config_size =
            config_vmo.get_content_size().expect("must be able to read config vmo content size");
        assert_ne!(config_size, 0, "config vmo must be non-empty");
        let config_bytes =
            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
        let fidl_start = 2 + checksum_length;
        let observed_checksum = &config_bytes[2..fidl_start];
        let expected_checksum = vec![
            0x78, 0x74, 0xb8, 0x4a, 0xc9, 0x0f, 0xe7, 0xba, 0x2a, 0xda, 0x7e, 0x8b, 0x25, 0xd7,
            0x78, 0xa1, 0x6a, 0x10, 0x05, 0xc4, 0xaa, 0xd4, 0xeb, 0xc1, 0x81, 0xd7, 0x98, 0xf5,
            0x8e, 0xc3, 0x14, 0xa4,
        ];
        assert_eq!(
            observed_checksum, expected_checksum,
            "checksum from config VMO does not match expected checksum"
        );
        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
            .expect("must be able to parse bytes as config FIDL");
        Self {
            back_off_time_between_pull_samples_sec: fidl_config
                .back_off_time_between_pull_samples_sec,
            disable_delays: fidl_config.disable_delays,
            early_exit: fidl_config.early_exit,
            first_sampling_delay_sec: fidl_config.first_sampling_delay_sec,
            has_real_time_clock: fidl_config.has_real_time_clock,
            initial_frequency_ppm: fidl_config.initial_frequency_ppm,
            max_frequency_error_ppm: fidl_config.max_frequency_error_ppm,
            monitor_time_source_url: fidl_config.monitor_time_source_url,
            monitor_uses_pull: fidl_config.monitor_uses_pull,
            oscillator_error_std_dev_ppm: fidl_config.oscillator_error_std_dev_ppm,
            power_topology_integration_enabled: fidl_config.power_topology_integration_enabled,
            primary_time_source_url: fidl_config.primary_time_source_url,
            primary_uses_pull: fidl_config.primary_uses_pull,
            serve_fuchsia_time_alarms: fidl_config.serve_fuchsia_time_alarms,
            serve_test_protocols: fidl_config.serve_test_protocols,
            utc_start_at_startup: fidl_config.utc_start_at_startup,
            utc_start_at_startup_when_invalid_rtc: fidl_config
                .utc_start_at_startup_when_invalid_rtc,
        }
    }
    pub fn record_inspect(&self, inspector_node: &Node) {
        inspector_node.record_int(
            "back_off_time_between_pull_samples_sec",
            self.back_off_time_between_pull_samples_sec,
        );
        inspector_node.record_bool("disable_delays", self.disable_delays);
        inspector_node.record_bool("early_exit", self.early_exit);
        inspector_node.record_int("first_sampling_delay_sec", self.first_sampling_delay_sec);
        inspector_node.record_bool("has_real_time_clock", self.has_real_time_clock);
        inspector_node.record_uint("initial_frequency_ppm", self.initial_frequency_ppm as u64);
        inspector_node.record_uint("max_frequency_error_ppm", self.max_frequency_error_ppm as u64);
        inspector_node.record_string("monitor_time_source_url", &self.monitor_time_source_url);
        inspector_node.record_bool("monitor_uses_pull", self.monitor_uses_pull);
        inspector_node
            .record_uint("oscillator_error_std_dev_ppm", self.oscillator_error_std_dev_ppm as u64);
        inspector_node.record_bool(
            "power_topology_integration_enabled",
            self.power_topology_integration_enabled,
        );
        inspector_node.record_string("primary_time_source_url", &self.primary_time_source_url);
        inspector_node.record_bool("primary_uses_pull", self.primary_uses_pull);
        inspector_node.record_bool("serve_fuchsia_time_alarms", self.serve_fuchsia_time_alarms);
        inspector_node.record_bool("serve_test_protocols", self.serve_test_protocols);
        inspector_node.record_bool("utc_start_at_startup", self.utc_start_at_startup);
        inspector_node.record_bool(
            "utc_start_at_startup_when_invalid_rtc",
            self.utc_start_at_startup_when_invalid_rtc,
        );
    }
}