cloud-hypervisor/hypervisor/src/device.rs

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// Copyright © 2019 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
//
// Copyright © 2020, Microsoft Corporation
//
// Copyright 2018-2019 CrowdStrike, Inc.
//
// Copyright 2020, ARM Limited
//
use crate::DeviceAttr;
use std::os::unix::io::AsRawFd;
use thiserror::Error;
#[derive(Error, Debug)]
///
/// Enum for device error
pub enum HypervisorDeviceError {
///
/// Set device attribute error
///
#[error("Failed to set device attribute: {0}")]
SetDeviceAttribute(#[source] anyhow::Error),
///
/// Get device attribute error
///
#[error("Failed to get device attribute: {0}")]
GetDeviceAttribute(#[source] anyhow::Error),
}
///
/// Result type for returning from a function
///
pub type Result<T> = std::result::Result<T, HypervisorDeviceError>;
///
/// Trait to represent a device
///
/// This crate provides a hypervisor-agnostic interfaces for device
///
pub trait Device: Send + Sync + AsRawFd {
/// Set device attribute.
fn set_device_attr(&self, attr: &DeviceAttr) -> Result<()>;
/// Get device attribute.
fn get_device_attr(&self, attr: &mut DeviceAttr) -> Result<()>;
}