fxfs_config/
fxfs_config_rust_config_lib_source.rs

1use fidl::unpersist;
2use fidl_cf_sc_internal_fxfsconfig::Config as FidlConfig;
3use fuchsia_component_config::{Config as ComponentConfig, Error};
4use fuchsia_inspect::Node;
5use std::convert::TryInto;
6const EXPECTED_CHECKSUM: &[u8] = &[
7    0x53, 0xad, 0xec, 0x19, 0x22, 0xe4, 0xe5, 0x83, 0x5d, 0x31, 0x58, 0x95, 0x1f, 0x8e, 0x62, 0xf4,
8    0x6d, 0xf0, 0xfd, 0xe5, 0x9c, 0xd7, 0xa0, 0x84, 0x26, 0xe8, 0xdb, 0x86, 0x22, 0x52, 0xcc, 0x89,
9];
10const EXPECTED_CHECKSUM_LENGTH: [u8; 2] = (EXPECTED_CHECKSUM.len() as u16).to_le_bytes();
11#[derive(Debug)]
12pub struct Config {
13    pub storage_stall_watchdog_enabled: bool,
14}
15impl Config {
16    #[doc = r" Take the config startup handle and parse its contents."]
17    #[doc = r""]
18    #[doc = r" # Panics"]
19    #[doc = r""]
20    #[doc = r" If the config startup handle was already taken or if it is not valid."]
21    pub fn take_from_startup_handle() -> Self {
22        <Self as ComponentConfig>::take_from_startup_handle()
23    }
24    #[doc = r" Parse `Self` from `vmo`."]
25    pub fn from_vmo(vmo: &zx::Vmo) -> Result<Self, Error> {
26        <Self as ComponentConfig>::from_vmo(vmo)
27    }
28    #[doc = r" Parse `Self` from `bytes`."]
29    pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
30        <Self as ComponentConfig>::from_bytes(bytes)
31    }
32    pub fn record_inspect(&self, inspector_node: &Node) {
33        <Self as ComponentConfig>::record_inspect(self, inspector_node)
34    }
35}
36impl ComponentConfig for Config {
37    #[doc = r" Parse `Self` from `bytes`."]
38    fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
39        let (checksum_len_bytes, bytes) = bytes.split_at_checked(2).ok_or(Error::TooFewBytes)?;
40        let checksum_len_bytes: [u8; 2] =
41            checksum_len_bytes.try_into().expect("previous call guaranteed 2 element slice");
42        let checksum_length = u16::from_le_bytes(checksum_len_bytes) as usize;
43        let (observed_checksum, bytes) =
44            bytes.split_at_checked(checksum_length).ok_or(Error::TooFewBytes)?;
45        if observed_checksum != EXPECTED_CHECKSUM {
46            return Err(Error::ChecksumMismatch {
47                expected_checksum: EXPECTED_CHECKSUM.to_vec(),
48                observed_checksum: observed_checksum.to_vec(),
49            });
50        }
51        let fidl_config: FidlConfig = unpersist(bytes).map_err(Error::Unpersist)?;
52        Ok(Self { storage_stall_watchdog_enabled: fidl_config.storage_stall_watchdog_enabled })
53    }
54    fn to_bytes(&self) -> Result<Vec<u8>, Error> {
55        let fidl_config = FidlConfig {
56            storage_stall_watchdog_enabled: self.storage_stall_watchdog_enabled.clone(),
57        };
58        let mut fidl_bytes = fidl::persist(&fidl_config).map_err(Error::Persist)?;
59        let mut bytes = Vec::with_capacity(
60            EXPECTED_CHECKSUM_LENGTH.len() + EXPECTED_CHECKSUM.len() + fidl_bytes.len(),
61        );
62        bytes.extend_from_slice(&EXPECTED_CHECKSUM_LENGTH);
63        bytes.extend_from_slice(EXPECTED_CHECKSUM);
64        bytes.append(&mut fidl_bytes);
65        Ok(bytes)
66    }
67    fn record_inspect(&self, inspector_node: &Node) {
68        inspector_node
69            .record_bool("storage_stall_watchdog_enabled", self.storage_stall_watchdog_enabled);
70    }
71}
fxfs_config/fxfs_config_rust_config_lib_source.rs

fxfs_config/
fxfs_config_rust_config_lib_source.rs
