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938fe2a744
This type helps to perform atomic operations by writing to a temporary file and renaming it to the actual filename when the `AtomicFile::finish` function is called. If the `AtomicFile::finish` function is never called, the temporary file is automatically removed when it goes out of scope. It utilizes the `renameat2` [1] libc function and its semantics. [1] https://man7.org/linux/man-pages/man2/renameat.2.html Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
110 lines
2.7 KiB
Rust
110 lines
2.7 KiB
Rust
// SPDX-License-Identifier: MIT
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//
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// Copyright IBM Corp. 2023, 2024
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use std::path::PathBuf;
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/// Result type for this crate
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pub type Result<T, E = Error> = std::result::Result<T, E>;
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/// Error cases for this crate
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#[allow(missing_docs)]
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#[derive(thiserror::Error, Debug)]
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#[non_exhaustive]
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pub enum Error {
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#[error("Ultravisor: '{msg}' ({rc:#06x},{rrc:#06x})")]
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Uv {
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rc: u16,
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rrc: u16,
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msg: &'static str,
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},
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#[error("{0}")]
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Specification(String),
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#[error("Cannot {ty} {ctx} at `{path}`")]
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FileIo {
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ty: FileIoErrorType,
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ctx: String,
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path: PathBuf,
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source: std::io::Error,
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},
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#[error("Cannot {ty} `{path}`")]
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FileAccess {
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ty: FileAccessErrorType,
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path: PathBuf,
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source: std::io::Error,
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},
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#[error("Cannot rename '{src}' to '{dst}'")]
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FileAccessRename {
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src: String,
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dst: String,
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source: std::io::Error,
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},
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#[error("Cannot encode secrets (Too many secrets)")]
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ManySecrets,
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#[error("Cannot decode secret list")]
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InvSecretList(#[source] std::io::Error),
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#[error("Input does not contain an add-secret request")]
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NoAsrcb,
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#[error("Input add-secret request is larger than 8k")]
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AscrbLarge,
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#[error("Input contains unsupported user-data type: {0:#06x}")]
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UnsupportedUserData(u16),
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#[error("The input has not the correct format: {field} is too large. Maximal size {max_size}")]
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AttDataSizeLarge { field: &'static str, max_size: u32 },
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#[error("The input has not the correct format: {field} is too small. Minimal size {min_size}")]
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AttDataSizeSmall { field: &'static str, min_size: u32 },
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#[error("The attestation request has an unknown algorithm type (.0)")]
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BinArcbInvAlgorithm(u32),
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#[error("The attestation request does not specify a measurement size or measurement data.")]
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BinArcbNoMeasurement,
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// errors from other crates
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#[error(transparent)]
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Io(#[from] std::io::Error),
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#[error(transparent)]
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ParseInt(#[from] std::num::ParseIntError),
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#[error("Cannot decode hex string: Size {0} is not a multiple of two")]
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InvHexStringSize(usize),
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#[error("Cannot decode hex string")]
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InvHexStringChar { source: std::num::ParseIntError },
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#[error("Expected size {0}, found {1}")]
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LengthMismatch(usize, usize),
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}
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/// Error cases for I/O operations
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#[derive(thiserror::Error, Debug)]
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#[non_exhaustive]
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#[allow(missing_docs)]
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pub enum FileIoErrorType {
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#[error("read")]
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Read,
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#[error("write")]
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Write,
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}
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/// Error cases for accessing files
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#[derive(thiserror::Error, Debug)]
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#[non_exhaustive]
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#[allow(missing_docs)]
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pub enum FileAccessErrorType {
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#[error("open")]
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Open,
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#[error("create")]
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Create,
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}
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