pkg_cache_config/
config_lib_rust_config_lib_source.rs

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1use fidl::unpersist;
2use fidl_cf_sc_internal_pkgcacheconfig::Config as FidlConfig;
3use fuchsia_inspect::Node;
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5#[derive(Debug)]
6pub struct Config {
7    pub all_packages_executable: bool,
8    pub enable_upgradable_packages: bool,
9    pub use_fxblob: bool,
10    pub use_system_image: bool,
11}
12impl Config {
13    pub fn take_from_startup_handle() -> Self {
14        let config_vmo: zx::Vmo =
15            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
16                .expect("Config VMO handle must be provided and cannot already have been taken.")
17                .into();
18        let config_size =
19            config_vmo.get_content_size().expect("must be able to read config vmo content size");
20        assert_ne!(config_size, 0, "config vmo must be non-empty");
21        let config_bytes =
22            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
23        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
24        let fidl_start = 2 + checksum_length;
25        let observed_checksum = &config_bytes[2..fidl_start];
26        let expected_checksum = vec![
27            0x50, 0x31, 0x81, 0x4e, 0x47, 0x76, 0xaa, 0xbb, 0x26, 0xf4, 0x07, 0xad, 0xbe, 0xfc,
28            0xbb, 0x5d, 0x7f, 0x74, 0x50, 0x37, 0x57, 0x85, 0x99, 0xb8, 0xe9, 0xa8, 0xd7, 0xc8,
29            0x77, 0x81, 0x73, 0xa5,
30        ];
31        assert_eq!(
32            observed_checksum, expected_checksum,
33            "checksum from config VMO does not match expected checksum"
34        );
35        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
36            .expect("must be able to parse bytes as config FIDL");
37        Self {
38            all_packages_executable: fidl_config.all_packages_executable,
39            enable_upgradable_packages: fidl_config.enable_upgradable_packages,
40            use_fxblob: fidl_config.use_fxblob,
41            use_system_image: fidl_config.use_system_image,
42        }
43    }
44    pub fn record_inspect(&self, inspector_node: &Node) {
45        inspector_node.record_bool("all_packages_executable", self.all_packages_executable);
46        inspector_node.record_bool("enable_upgradable_packages", self.enable_upgradable_packages);
47        inspector_node.record_bool("use_fxblob", self.use_fxblob);
48        inspector_node.record_bool("use_system_image", self.use_system_image);
49    }
50}
pkg_cache_config/config_lib_rust_config_lib_source.rs

pkg_cache_config/
config_lib_rust_config_lib_source.rs
