cloud-hypervisor/vhost_user_fs/src/lib.rs

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// Copyright © 2019 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
#[macro_use]
extern crate log;
pub mod descriptor_utils;
pub mod file_traits;
pub mod filesystem;
pub mod fs_cache_req_handler;
pub mod fuse;
pub mod multikey;
pub mod passthrough;
pub mod server;
use std::ffi::FromBytesWithNulError;
use std::{error, fmt, io};
#[derive(Debug)]
pub enum Error {
/// Failed to decode protocol messages.
DecodeMessage(io::Error),
/// Failed to encode protocol messages.
EncodeMessage(io::Error),
/// One or more parameters are missing.
MissingParameter,
/// A C string parameter is invalid.
InvalidCString(FromBytesWithNulError),
/// The `len` field of the header is too small.
InvalidHeaderLength,
/// The `size` field of the `SetxattrIn` message does not match the length
/// of the decoded value.
InvalidXattrSize((u32, usize)),
}
impl error::Error for Error {}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use Error::*;
match self {
DecodeMessage(err) => write!(f, "failed to decode fuse message: {}", err),
EncodeMessage(err) => write!(f, "failed to encode fuse message: {}", err),
MissingParameter => write!(f, "one or more parameters are missing"),
InvalidHeaderLength => write!(f, "the `len` field of the header is too small"),
InvalidCString(err) => write!(f, "a c string parameter is invalid: {}", err),
InvalidXattrSize((size, len)) => write!(
f,
"The `size` field of the `SetxattrIn` message does not match the length of the\
decoded value: size = {}, value.len() = {}",
size, len
),
}
}
}
pub type Result<T> = ::std::result::Result<T, Error>;