devices/virtio/vhost_user_frontend/
error.rs

1// Copyright 2021 The ChromiumOS Authors
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use remain::sorted;
6use thiserror::Error as ThisError;
7use vm_memory::GuestMemoryError;
8use vmm_vhost::message::VhostUserProtocolFeatures;
9use vmm_vhost::Error as VhostError;
10
11#[sorted]
12#[derive(ThisError, Debug)]
13pub enum Error {
14    /// Failed to copy config to a buffer.
15    #[error("failed to copy config to a buffer: {0}")]
16    CopyConfig(std::io::Error),
17    /// Failed to create backend request handler
18    #[error("could not create backend req handler: {0}")]
19    CreateBackendReqHandler(VhostError),
20    /// Failed to create `base::Event`.
21    #[error("failed to create Event: {0}")]
22    CreateEvent(base::Error),
23    /// Failed to get config.
24    #[error("failed to get config: {0}")]
25    GetConfig(VhostError),
26    /// Failed to get features.
27    #[error("failed to get features: {0}")]
28    GetFeatures(VhostError),
29    /// Failed to get host address.
30    #[error("failed to get host address: {0}")]
31    GetHostAddress(GuestMemoryError),
32    /// Failed to get protocol features.
33    #[error("failed to get protocol features: {0}")]
34    GetProtocolFeatures(VhostError),
35    /// Failed to get number of queues.
36    #[error("failed to get number of queues: {0}")]
37    GetQueueNum(VhostError),
38    /// Failed to get vring base offset.
39    #[error("failed to get vring base offset: {0}")]
40    GetVringBase(VhostError),
41    /// MSI-X config is unavailable.
42    #[error("MSI-X config is unavailable")]
43    MsixConfigUnavailable,
44    /// MSI-X irqfd is unavailable.
45    #[error("MSI-X irqfd is unavailable")]
46    MsixIrqfdUnavailable,
47    #[error("protocol feature is not negotiated: {0:?}")]
48    ProtocolFeatureNotNegoiated(VhostUserProtocolFeatures),
49    /// Failed to reset owner.
50    #[error("failed to reset owner: {0}")]
51    ResetOwner(VhostError),
52    /// Failed to restore.
53    #[error("failed to restore: {0}")]
54    Restore(VhostError),
55    /// Failed to convert serde Value to a slice.
56    #[error("failed to convert a serde Value to slice {0}")]
57    SerdeValueToSlice(anyhow::Error),
58    /// Failed to set config.
59    #[error("failed to set config: {0}")]
60    SetConfig(VhostError),
61    /// Failed to set device request channel.
62    #[error("failed to set device request channel: {0}")]
63    SetDeviceRequestChannel(VhostError),
64    /// Failed to set features.
65    #[error("failed to set features: {0}")]
66    SetFeatures(VhostError),
67    /// Failed to set memory map regions.
68    #[error("failed to set memory map regions: {0}")]
69    SetMemTable(VhostError),
70    /// Failed to set owner.
71    #[error("failed to set owner: {0}")]
72    SetOwner(VhostError),
73    /// Failed to set protocol features.
74    #[error("failed to set protocol features: {0}")]
75    SetProtocolFeatures(VhostError),
76    /// Failed to set vring address.
77    #[error("failed to set vring address: {0}")]
78    SetVringAddr(VhostError),
79    /// Failed to set vring base offset.
80    #[error("failed to set vring base offset: {0}")]
81    SetVringBase(VhostError),
82    /// Failed to set eventfd to signal used vring buffers.
83    #[error("failed to set eventfd to signal used vring buffers: {0}")]
84    SetVringCall(VhostError),
85    /// Failed to enable or disable vring.
86    #[error("failed to enable or disable vring: {0}")]
87    SetVringEnable(VhostError),
88    /// Failed to set eventfd for adding buffers to vring.
89    #[error("failed to set eventfd for adding buffers to vring: {0}")]
90    SetVringKick(VhostError),
91    /// Failed to set the size of the queue.
92    #[error("failed to set the size of the queue: {0}")]
93    SetVringNum(VhostError),
94    /// Error getting the shmem regions.
95    #[error("failed to enumerate shmem regions {0}")]
96    ShmemRegions(VhostError),
97    /// Failed to sleep the device.
98    #[error("failed to sleep the device {0}")]
99    Sleep(VhostError),
100    /// Failed to convert a slice to a serde Value.
101    #[error("Failed to convert a slice to a serde Value: {0}")]
102    SliceToSerdeValue(anyhow::Error),
103    /// Failed to snapshot.
104    #[error("failed to snapshot: {0}")]
105    Snapshot(VhostError),
106    /// Failed to connect socket.
107    #[error("failed to connect socket: {0}")]
108    SocketConnect(std::io::Error),
109    /// Failed to spawn worker thread.
110    #[error("failed to spawn worker: {0}")]
111    SpawnWorker(std::io::Error),
112    /// The tag for the Fs device was too long to fit in the config space.
113    #[error("tag is too long: {len} > {max}")]
114    TagTooLong { len: usize, max: usize },
115    /// Too many shmem regions.
116    #[error("too many shmem regions: {0} > 1")]
117    TooManyShmemRegions(usize),
118    /// vring base from vhost-user backend is too big.
119    #[error("vring base returned by vhost-user backend is too big: {0}")]
120    VringBaseTooBig(u32),
121    /// failed to wake the vhost user device.
122    #[error("failed to wake the vhost user device.")]
123    Wake(VhostError),
124    /// failed to wake the worker.
125    #[error("failed to wake the worker.")]
126    WakeWorker,
127}
128
129pub type Result<T> = std::result::Result<T, Error>;
devices/virtio/vhost_user_frontend/error.rs

devices/virtio/vhost_user_frontend/
error.rs
