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vmsilo fork of vhost rust libraries
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Liu Jiang 74c353bb5f vhost_user: add VhostUserSlaveReqHandlerMut trait 
Rename the original VhostUserSlaveReqHandler trait as
VhostUserSlaveReqHandlerMut, and add another VhostUserSlaveReqHandler
trait with interior mutability.

This also help to simplify caller implementations.

Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
2021-03-01 12:50:56 +01:00
.cargo fix link issues on aarch64 musl 2020-09-04 17:59:53 +03:00
rust-vmm-ci@ebc701641f build(deps): bump rust-vmm-ci from e58ea74 to ebc7016 2021-02-24 07:53:25 +00:00
src vhost_user: add VhostUserSlaveReqHandlerMut trait 2021-03-01 12:50:56 +01:00
.gitignore Update .gitignore file 2021-03-01 12:50:56 +01:00
.gitmodules Switch to rust-vmm-ci for the CI 2020-09-04 17:59:53 +03:00
Cargo.toml Upgrade to rust 2018 edition 2021-03-01 12:50:56 +01:00
CODEOWNERS CODEOWNERS: Make PullAssigner the default owner 2019-09-10 13:59:28 +08:00
coverage_config_aarch64.json Switch to rust-vmm-ci for the CI 2020-09-04 17:59:53 +03:00
coverage_config_x86_64.json Upgrade to rust 2018 edition 2021-03-01 12:50:56 +01:00
LICENSE Initial commit 2019-04-03 14:38:29 +08:00
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README.md Add license files for BSD-Alibaba, BSD-Google 2020-09-04 17:59:53 +03:00

README.md

vHost

A crate to support vhost backend drivers for virtio devices.

Kernel-based vHost Backend Drivers

The vhost drivers in Linux provide in-kernel virtio device emulation. Normally the hypervisor userspace process emulates I/O accesses from the guest. Vhost puts virtio emulation code into the kernel, taking hypervisor userspace out of the picture. This allows device emulation code to directly call into kernel subsystems instead of performing system calls from userspace. The hypervisor relies on ioctl based interfaces to control those in-kernel vhost drivers, such as vhost-net, vhost-scsi and vhost-vsock etc.

vHost-user Backend Drivers

The vhost-user protocol is aiming to implement vhost backend drivers in userspace, which complements the ioctl interface used to control the vhost implementation in the Linux kernel. It implements the control plane needed to establish virtqueue sharing with a user space process on the same host. It uses communication over a Unix domain socket to share file descriptors in the ancillary data of the message.

The protocol defines two sides of the communication, master and slave. Master is the application that shares its virtqueues, slave is the consumer of the virtqueues. Master and slave can be either a client (i.e. connecting) or server (listening) in the socket communication.