1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
// Copyright (C) 2019 Alibaba Cloud. All rights reserved.
// SPDX-License-Identifier: Apache-2.0 or BSD-3-Clause
//
// 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-BSD-Google file.
//! Kernel-based vhost-vsock backend.
use std::fs::{File, OpenOptions};
use std::os::unix::fs::OpenOptionsExt;
use std::os::unix::io::{AsRawFd, RawFd};
use sys_util::ioctl_with_ref;
use vm_memory::GuestAddressSpace;
use super::vhost_binding::{VHOST_VSOCK_SET_GUEST_CID, VHOST_VSOCK_SET_RUNNING};
use super::{ioctl_result, Error, Result, VhostKernBackend};
use crate::vsock::VhostVsock;
const VHOST_PATH: &str = "/dev/vhost-vsock";
/// Handle for running VHOST_VSOCK ioctls.
pub struct Vsock<AS: GuestAddressSpace> {
fd: File,
mem: AS,
}
impl<AS: GuestAddressSpace> Vsock<AS> {
/// Open a handle to a new VHOST-VSOCK instance.
pub fn new(mem: AS) -> Result<Self> {
Ok(Vsock {
fd: OpenOptions::new()
.read(true)
.write(true)
.custom_flags(libc::O_CLOEXEC | libc::O_NONBLOCK)
.open(VHOST_PATH)
.map_err(Error::VhostOpen)?,
mem,
})
}
fn set_running(&self, running: bool) -> Result<()> {
let on: ::std::os::raw::c_int = if running { 1 } else { 0 };
let ret = unsafe { ioctl_with_ref(&self.fd, VHOST_VSOCK_SET_RUNNING(), &on) };
ioctl_result(ret, ())
}
}
impl<AS: GuestAddressSpace> VhostVsock for Vsock<AS> {
fn set_guest_cid(&self, cid: u64) -> Result<()> {
let ret = unsafe { ioctl_with_ref(&self.fd, VHOST_VSOCK_SET_GUEST_CID(), &cid) };
ioctl_result(ret, ())
}
fn start(&self) -> Result<()> {
self.set_running(true)
}
fn stop(&self) -> Result<()> {
self.set_running(false)
}
}
impl<AS: GuestAddressSpace> VhostKernBackend for Vsock<AS> {
type AS = AS;
fn mem(&self) -> &Self::AS {
&self.mem
}
}
impl<AS: GuestAddressSpace> AsRawFd for Vsock<AS> {
fn as_raw_fd(&self) -> RawFd {
self.fd.as_raw_fd()
}
}
#[cfg(test)]
mod tests {
use sys_util::EventFd;
use vm_memory::{GuestAddress, GuestMemory, GuestMemoryMmap};
use super::*;
use crate::{VhostBackend, VhostUserMemoryRegionInfo, VringConfigData};
// Ignore all tests because /dev/vhost-vsock is unavailable in Chrome OS chroot.
#[test]
#[ignore]
fn test_vsock_new_device() {
let m = GuestMemoryMmap::from_ranges(&[(GuestAddress(0), 0x10_0000)]).unwrap();
let vsock = Vsock::new(&m).unwrap();
assert!(vsock.as_raw_fd() >= 0);
assert!(vsock.mem().find_region(GuestAddress(0x100)).is_some());
assert!(vsock.mem().find_region(GuestAddress(0x10_0000)).is_none());
}
#[test]
#[ignore]
fn test_vsock_is_valid() {
let m = GuestMemoryMmap::from_ranges(&[(GuestAddress(0), 0x10_0000)]).unwrap();
let vsock = Vsock::new(&m).unwrap();
let mut config = VringConfigData {
queue_max_size: 32,
queue_size: 32,
flags: 0,
desc_table_addr: 0x1000,
used_ring_addr: 0x2000,
avail_ring_addr: 0x3000,
log_addr: None,
};
assert_eq!(vsock.is_valid(&config), true);
config.queue_size = 0;
assert_eq!(vsock.is_valid(&config), false);
config.queue_size = 31;
assert_eq!(vsock.is_valid(&config), false);
config.queue_size = 33;
assert_eq!(vsock.is_valid(&config), false);
}
#[test]
#[ignore]
fn test_vsock_ioctls() {
let m = GuestMemoryMmap::from_ranges(&[(GuestAddress(0), 0x10_0000)]).unwrap();
let vsock = Vsock::new(&m).unwrap();
let features = vsock.get_features().unwrap();
vsock.set_features(features).unwrap();
vsock.set_owner().unwrap();
vsock.set_mem_table(&[]).unwrap_err();
/*
let region = VhostUserMemoryRegionInfo {
guest_phys_addr: 0x0,
memory_size: 0x10_0000,
userspace_addr: 0,
mmap_offset: 0,
mmap_handle: -1,
};
vsock.set_mem_table(&[region]).unwrap_err();
*/
let region = VhostUserMemoryRegionInfo {
guest_phys_addr: 0x0,
memory_size: 0x10_0000,
userspace_addr: m.get_host_address(GuestAddress(0x0)).unwrap() as u64,
mmap_offset: 0,
mmap_handle: -1,
};
vsock.set_mem_table(&[region]).unwrap();
vsock.set_log_base(0x4000, Some(1)).unwrap_err();
vsock.set_log_base(0x4000, None).unwrap();
let eventfd = EventFd::new().unwrap();
vsock.set_log_fd(eventfd.as_raw_fd()).unwrap();
vsock.set_vring_num(0, 32).unwrap();
let config = VringConfigData {
queue_max_size: 32,
queue_size: 32,
flags: 0,
desc_table_addr: 0x1000,
used_ring_addr: 0x2000,
avail_ring_addr: 0x3000,
log_addr: None,
};
vsock.set_vring_addr(0, &config).unwrap();
vsock.set_vring_base(0, 1).unwrap();
vsock.set_vring_call(0, &eventfd).unwrap();
vsock.set_vring_kick(0, &eventfd).unwrap();
vsock.set_vring_err(0, &eventfd).unwrap();
assert_eq!(vsock.get_vring_base(0).unwrap(), 1);
vsock.set_guest_cid(0xdead).unwrap();
//vsock.start().unwrap();
//vsock.stop().unwrap();
}
}
|
