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misc: net_util: streamline #[source] and Error impl

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This streamlines the Error implementation in the Cloud Hypervisor code
base to match the remaining parts so that everything follows the agreed
conventions. These are leftovers missed in the previous commits.

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com
This commit is contained in:
Philipp Schuster
2025-05-21 13:32:58 +02:00
committed by Rob Bradford
parent 799336459d
commit ea6d5a04fa
1 changed files with 13 additions and 5 deletions
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18
net_util/src/ctrl_queue.rs
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@@ -5,6 +5,7 @@
use std::sync::Arc;
use libc::c_uint;
use thiserror::Error;
use virtio_bindings::virtio_net::{
VIRTIO_NET_CTRL_GUEST_OFFLOADS, VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET, VIRTIO_NET_CTRL_MQ,
VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX, VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN,
@@ -18,22 +19,29 @@ use vm_virtio::{AccessPlatform, Translatable};
use crate::{GuestMemoryMmap, Tap};
#[derive(Debug)]
#[derive(Error, Debug)]
pub enum Error {
/// Read queue failed.
GuestMemory(GuestMemoryError),
#[error("Read queue failed")]
GuestMemory(#[source] GuestMemoryError),
/// No control header descriptor
#[error("No control header descriptor")]
NoControlHeaderDescriptor,
/// Missing the data descriptor in the chain.
#[error("Missing the data descriptor in the chain")]
NoDataDescriptor,
/// No status descriptor
#[error("No status descriptor")]
NoStatusDescriptor,
/// Failed adding used index
QueueAddUsed(virtio_queue::Error),
#[error("Failed adding used index")]
QueueAddUsed(#[source] virtio_queue::Error),
/// Failed creating an iterator over the queue
QueueIterator(virtio_queue::Error),
#[error("Failed creating an iterator over the queue")]
QueueIterator(#[source] virtio_queue::Error),
/// Failed enabling notification for the queue
QueueEnableNotification(virtio_queue::Error),
#[error("Failed enabling notification for the queue")]
QueueEnableNotification(#[source] virtio_queue::Error),
}
type Result<T> = std::result::Result<T, Error>;