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// Copyright 2017 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//! Implements vhost-based virtio devices.
use std;
use std::fmt::{self, Display};
use net_util::Error as TapError;
use remain::sorted;
use sys_util::Error as SysError;
use vhost::Error as VhostError;
mod control_socket;
mod net;
mod vsock;
mod worker;
pub use self::control_socket::*;
pub use self::net::Net;
pub use self::vsock::Vsock;
#[sorted]
#[derive(Debug)]
pub enum Error {
/// Cloning kill eventfd failed.
CloneKillEventFd(SysError),
/// Creating kill eventfd failed.
CreateKillEventFd(SysError),
/// Creating poll context failed.
CreatePollContext(SysError),
/// Error while polling for events.
PollError(SysError),
/// Enabling tap interface failed.
TapEnable(TapError),
/// Open tap device failed.
TapOpen(TapError),
/// Setting tap IP failed.
TapSetIp(TapError),
/// Setting tap mac address failed.
TapSetMacAddress(TapError),
/// Setting tap netmask failed.
TapSetNetmask(TapError),
/// Setting tap interface offload flags failed.
TapSetOffload(TapError),
/// Setting vnet header size failed.
TapSetVnetHdrSize(TapError),
/// Get features failed.
VhostGetFeatures(VhostError),
/// Failed to create vhost eventfd.
VhostIrqCreate(SysError),
/// Failed to read vhost eventfd.
VhostIrqRead(SysError),
/// Net set backend failed.
VhostNetSetBackend(VhostError),
/// Failed to open vhost device.
VhostOpen(VhostError),
/// Set features failed.
VhostSetFeatures(VhostError),
/// Set mem table failed.
VhostSetMemTable(VhostError),
/// Set owner failed.
VhostSetOwner(VhostError),
/// Set vring addr failed.
VhostSetVringAddr(VhostError),
/// Set vring base failed.
VhostSetVringBase(VhostError),
/// Set vring call failed.
VhostSetVringCall(VhostError),
/// Set vring kick failed.
VhostSetVringKick(VhostError),
/// Set vring num failed.
VhostSetVringNum(VhostError),
/// Failed to set CID for guest.
VhostVsockSetCid(VhostError),
/// Failed to start vhost-vsock driver.
VhostVsockStart(VhostError),
}
pub type Result<T> = std::result::Result<T, Error>;
impl Display for Error {
#[remain::check]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::Error::*;
#[sorted]
match self {
CloneKillEventFd(e) => write!(f, "failed to clone kill eventfd: {}", e),
CreateKillEventFd(e) => write!(f, "failed to create kill eventfd: {}", e),
CreatePollContext(e) => write!(f, "failed to create poll context: {}", e),
PollError(e) => write!(f, "failed polling for events: {}", e),
TapEnable(e) => write!(f, "failed to enable tap interface: {}", e),
TapOpen(e) => write!(f, "failed to open tap device: {}", e),
TapSetIp(e) => write!(f, "failed to set tap IP: {}", e),
TapSetMacAddress(e) => write!(f, "failed to set tap mac address: {}", e),
TapSetNetmask(e) => write!(f, "failed to set tap netmask: {}", e),
TapSetOffload(e) => write!(f, "failed to set tap interface offload flags: {}", e),
TapSetVnetHdrSize(e) => write!(f, "failed to set vnet header size: {}", e),
VhostGetFeatures(e) => write!(f, "failed to get features: {}", e),
VhostIrqCreate(e) => write!(f, "failed to create vhost eventfd: {}", e),
VhostIrqRead(e) => write!(f, "failed to read vhost eventfd: {}", e),
VhostNetSetBackend(e) => write!(f, "net set backend failed: {}", e),
VhostOpen(e) => write!(f, "failed to open vhost device: {}", e),
VhostSetFeatures(e) => write!(f, "failed to set features: {}", e),
VhostSetMemTable(e) => write!(f, "failed to set mem table: {}", e),
VhostSetOwner(e) => write!(f, "failed to set owner: {}", e),
VhostSetVringAddr(e) => write!(f, "failed to set vring addr: {}", e),
VhostSetVringBase(e) => write!(f, "failed to set vring base: {}", e),
VhostSetVringCall(e) => write!(f, "failed to set vring call: {}", e),
VhostSetVringKick(e) => write!(f, "failed to set vring kick: {}", e),
VhostSetVringNum(e) => write!(f, "failed to set vring num: {}", e),
VhostVsockSetCid(e) => write!(f, "failed to set CID for guest: {}", e),
VhostVsockStart(e) => write!(f, "failed to start vhost-vsock driver: {}", e),
}
}
}
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