devices/virtio/vhost/
mod.rs

1// Copyright 2017 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
5//! Implements vhost-based virtio devices.
6
7use base::Error as SysError;
8use base::TubeError;
9use net_util::Error as TapError;
10use remain::sorted;
11use thiserror::Error;
12#[cfg(any(target_os = "android", target_os = "linux"))]
13use vhost::Error as VhostError;
14
15mod control_socket;
16
17pub use self::control_socket::*;
18
19cfg_if::cfg_if! {
20    if #[cfg(any(target_os = "android", target_os = "linux"))] {
21        #[cfg(feature = "net")]
22        mod net;
23        pub mod vsock;
24        #[cfg(target_arch = "aarch64")]
25        pub mod scmi;
26        mod worker;
27
28        #[cfg(feature = "net")]
29        pub use self::net::Net;
30        pub use self::vsock::Vsock;
31        #[cfg(target_arch = "aarch64")]
32        pub use self::scmi::Scmi;
33    } else if #[cfg(windows)] {}
34}
35
36#[sorted]
37#[derive(Error, Debug)]
38pub enum Error {
39    /// Cloning kill event failed.
40    #[error("failed to clone kill event: {0}")]
41    CloneKillEvent(SysError),
42    /// Creating kill event failed.
43    #[error("failed to create kill event: {0}")]
44    CreateKillEvent(SysError),
45    /// Creating tube failed.
46    #[error("failed to create tube: {0}")]
47    CreateTube(TubeError),
48    /// Creating wait context failed.
49    #[error("failed to create poll context: {0}")]
50    CreateWaitContext(SysError),
51    /// Enabling tap interface failed.
52    #[error("failed to enable tap interface: {0}")]
53    TapEnable(TapError),
54    /// Open tap device failed.
55    #[error("failed to open tap device: {0}")]
56    TapOpen(TapError),
57    /// Setting tap IP failed.
58    #[error("failed to set tap IP: {0}")]
59    TapSetIp(TapError),
60    /// Setting tap mac address failed.
61    #[error("failed to set tap mac address: {0}")]
62    TapSetMacAddress(TapError),
63    /// Setting tap netmask failed.
64    #[error("failed to set tap netmask: {0}")]
65    TapSetNetmask(TapError),
66    /// Setting tap interface offload flags failed.
67    #[error("failed to set tap interface offload flags: {0}")]
68    TapSetOffload(TapError),
69    /// Setting vnet header size failed.
70    #[error("failed to set vnet header size: {0}")]
71    TapSetVnetHdrSize(TapError),
72    /// Failed to read vhost error event.
73    #[error("failed to read vhost error event: {0}")]
74    VhostErrorRead(SysError),
75    /// Get features failed.
76    #[cfg(any(target_os = "android", target_os = "linux"))]
77    #[error("failed to get features: {0}")]
78    VhostGetFeatures(VhostError),
79    /// Vhost IOTLB required but not supported.
80    #[error("Vhost IOTLB required but not supported")]
81    VhostIotlbUnsupported,
82    /// Failed to create vhost event.
83    #[error("failed to create vhost event: {0}")]
84    VhostIrqCreate(SysError),
85    /// Failed to read vhost interrupt event.
86    #[error("failed to read vhost interrupt event: {0}")]
87    VhostIrqRead(SysError),
88    /// Net set backend failed.
89    #[cfg(any(target_os = "android", target_os = "linux"))]
90    #[error("net set backend failed: {0}")]
91    VhostNetSetBackend(VhostError),
92    /// Failed to open vhost device.
93    #[cfg(any(target_os = "android", target_os = "linux"))]
94    #[error("failed to open vhost device: {0}")]
95    VhostOpen(VhostError),
96    /// Set features failed.
97    #[cfg(any(target_os = "android", target_os = "linux"))]
98    #[error("failed to set features: {0}")]
99    VhostSetFeatures(VhostError),
100    /// Set mem table failed.
101    #[cfg(any(target_os = "android", target_os = "linux"))]
102    #[error("failed to set mem table: {0}")]
103    VhostSetMemTable(VhostError),
104    /// Set owner failed.
105    #[cfg(any(target_os = "android", target_os = "linux"))]
106    #[error("failed to set owner: {0}")]
107    VhostSetOwner(VhostError),
108    /// Set vring addr failed.
109    #[cfg(any(target_os = "android", target_os = "linux"))]
110    #[error("failed to set vring addr: {0}")]
111    VhostSetVringAddr(VhostError),
112    /// Set vring base failed.
113    #[cfg(any(target_os = "android", target_os = "linux"))]
114    #[error("failed to set vring base: {0}")]
115    VhostSetVringBase(VhostError),
116    /// Set vring call failed.
117    #[cfg(any(target_os = "android", target_os = "linux"))]
118    #[error("failed to set vring call: {0}")]
119    VhostSetVringCall(VhostError),
120    /// Set vring err failed.
121    #[cfg(any(target_os = "android", target_os = "linux"))]
122    #[error("failed to set vring err: {0}")]
123    VhostSetVringErr(VhostError),
124    /// Set vring kick failed.
125    #[cfg(any(target_os = "android", target_os = "linux"))]
126    #[error("failed to set vring kick: {0}")]
127    VhostSetVringKick(VhostError),
128    /// Set vring num failed.
129    #[cfg(any(target_os = "android", target_os = "linux"))]
130    #[error("failed to set vring num: {0}")]
131    VhostSetVringNum(VhostError),
132    /// Failed to set CID for guest.
133    #[cfg(any(target_os = "android", target_os = "linux"))]
134    #[error("failed to set CID for guest: {0}")]
135    VhostVsockSetCid(VhostError),
136    /// Failed to start vhost-vsock driver.
137    #[cfg(any(target_os = "android", target_os = "linux"))]
138    #[error("failed to start vhost-vsock driver: {0}")]
139    VhostVsockStart(VhostError),
140    #[error("queue missing vring base")]
141    VringBaseMissing,
142    /// Error while waiting for events.
143    #[error("failed waiting for events: {0}")]
144    WaitError(SysError),
145}
146
147pub type Result<T> = std::result::Result<T, Error>;
devices/virtio/vhost/mod.rs

devices/virtio/vhost/
mod.rs
