driver_index_config/
driver_index_config_rust_config_lib_source.rs

1use fidl::unpersist;
2use fidl_cf_sc_internal_driverindexconfig::Config as FidlConfig;
3use fuchsia_inspect::{ArrayProperty, Node};
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5#[derive(Debug)]
6pub struct Config {
7    pub base_drivers: Vec<String>,
8    pub bind_eager: Vec<String>,
9    pub boot_drivers: Vec<String>,
10    pub delay_fallback_until_base_drivers_indexed: bool,
11    pub disabled_drivers: Vec<String>,
12    pub driver_load_fuzzer_max_delay_ms: i64,
13    pub enable_driver_load_fuzzer: bool,
14    pub enable_ephemeral_drivers: bool,
15    pub stop_on_idle_timeout_millis: i64,
16}
17impl Config {
18    pub fn take_from_startup_handle() -> Self {
19        let config_vmo: zx::Vmo =
20            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
21                .expect("Config VMO handle must be provided and cannot already have been taken.")
22                .into();
23        let config_size =
24            config_vmo.get_content_size().expect("must be able to read config vmo content size");
25        assert_ne!(config_size, 0, "config vmo must be non-empty");
26        let config_bytes =
27            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
28        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
29        let fidl_start = 2 + checksum_length;
30        let observed_checksum = &config_bytes[2..fidl_start];
31        let expected_checksum = vec![
32            0x3c, 0x8f, 0x22, 0x9c, 0xa6, 0x41, 0xb9, 0x6e, 0xb8, 0x3e, 0x8c, 0xe1, 0xfd, 0xa9,
33            0x89, 0xbc, 0x75, 0x5b, 0xf0, 0xf0, 0x50, 0xc1, 0x55, 0xc8, 0x1a, 0xeb, 0xb0, 0x34,
34            0xce, 0x53, 0xe0, 0x43,
35        ];
36        assert_eq!(
37            observed_checksum, expected_checksum,
38            "checksum from config VMO does not match expected checksum"
39        );
40        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
41            .expect("must be able to parse bytes as config FIDL");
42        Self {
43            base_drivers: fidl_config.base_drivers,
44            bind_eager: fidl_config.bind_eager,
45            boot_drivers: fidl_config.boot_drivers,
46            delay_fallback_until_base_drivers_indexed: fidl_config
47                .delay_fallback_until_base_drivers_indexed,
48            disabled_drivers: fidl_config.disabled_drivers,
49            driver_load_fuzzer_max_delay_ms: fidl_config.driver_load_fuzzer_max_delay_ms,
50            enable_driver_load_fuzzer: fidl_config.enable_driver_load_fuzzer,
51            enable_ephemeral_drivers: fidl_config.enable_ephemeral_drivers,
52            stop_on_idle_timeout_millis: fidl_config.stop_on_idle_timeout_millis,
53        }
54    }
55    pub fn record_inspect(&self, inspector_node: &Node) {
56        let arr = inspector_node.create_string_array("base_drivers", self.base_drivers.len());
57        for i in 0..self.base_drivers.len() {
58            arr.set(i, &self.base_drivers[i]);
59        }
60        inspector_node.record(arr);
61        let arr = inspector_node.create_string_array("bind_eager", self.bind_eager.len());
62        for i in 0..self.bind_eager.len() {
63            arr.set(i, &self.bind_eager[i]);
64        }
65        inspector_node.record(arr);
66        let arr = inspector_node.create_string_array("boot_drivers", self.boot_drivers.len());
67        for i in 0..self.boot_drivers.len() {
68            arr.set(i, &self.boot_drivers[i]);
69        }
70        inspector_node.record(arr);
71        inspector_node.record_bool(
72            "delay_fallback_until_base_drivers_indexed",
73            self.delay_fallback_until_base_drivers_indexed,
74        );
75        let arr =
76            inspector_node.create_string_array("disabled_drivers", self.disabled_drivers.len());
77        for i in 0..self.disabled_drivers.len() {
78            arr.set(i, &self.disabled_drivers[i]);
79        }
80        inspector_node.record(arr);
81        inspector_node
82            .record_int("driver_load_fuzzer_max_delay_ms", self.driver_load_fuzzer_max_delay_ms);
83        inspector_node.record_bool("enable_driver_load_fuzzer", self.enable_driver_load_fuzzer);
84        inspector_node.record_bool("enable_ephemeral_drivers", self.enable_ephemeral_drivers);
85        inspector_node.record_int("stop_on_idle_timeout_millis", self.stop_on_idle_timeout_millis);
86    }
87}
driver_index_config/driver_index_config_rust_config_lib_source.rs

driver_index_config/
driver_index_config_rust_config_lib_source.rs
