vmm/devices/virtio/block/vhost_user/
persist.rs

1// Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
2// SPDX-License-Identifier: Apache-2.0
3
4//! Defines the structures needed for saving/restoring block devices.
5
6use serde::{Deserialize, Serialize};
7
8use super::VhostUserBlockError;
9use super::device::VhostUserBlock;
10use crate::devices::virtio::block::CacheType;
11use crate::devices::virtio::block::persist::BlockConstructorArgs;
12use crate::devices::virtio::persist::VirtioDeviceState;
13use crate::snapshot::Persist;
14
15/// vhost-user block device state.
16#[derive(Debug, Clone, Serialize, Deserialize)]
17pub struct VhostUserBlockState {
18    id: String,
19    partuuid: Option<String>,
20    cache_type: CacheType,
21    root_device: bool,
22    socket_path: String,
23    vu_acked_protocol_features: u64,
24    config_space: Vec<u8>,
25    virtio_state: VirtioDeviceState,
26}
27
28impl Persist<'_> for VhostUserBlock {
29    type State = VhostUserBlockState;
30    type ConstructorArgs = BlockConstructorArgs;
31    type Error = VhostUserBlockError;
32
33    fn save(&self) -> Self::State {
34        unimplemented!("VhostUserBlock does not support snapshotting yet");
35    }
36
37    fn restore(
38        _constructor_args: Self::ConstructorArgs,
39        _state: &Self::State,
40    ) -> Result<Self, Self::Error> {
41        Err(VhostUserBlockError::SnapshottingNotSupported)
42    }
43}
vmm/devices/virtio/block/vhost_user/persist.rs

vmm/devices/virtio/block/vhost_user/
persist.rs
