This series add vhost-user-vsock base device and its PCI version
(vhost-user-vsock-pci).
The vhost-user-vsock device can be used to implement the virtio-vsock
device emulation in user-space.
An use case might be Kata, where they prefer to emulate devices
in user-space.
The first patch creates a new vhost-vsock-common parent class
with the common code usable for both vhost-vsock and vhost-user-vsock
devices.
The other patches add the vhost-user-vsock base device and its PCI
version.
I also implemented a vhost-user-vsock [1] (still WiP) application written in
Rust using crates from Cloud Hypervisor.
The application implements the Firecracker hybrid vsock (vsock over
unix domain socket) [2]
The vhost-user-vsock-pci device can be tested following these steps:
# build vhost-user-vsock application
git clone https://github.com/stefano-garzarella/cloud-hypervisor.git
git checkout vhost-user-vsock
cargo build
# start vhost-user-vsock
./target/debug/vhost_user_vsock \
--vsock-backend
guest_cid=4,uds_path=/tmp/vm4.vsock,sock=/tmp/vhost4.socket
# start QEMU
qemu-system-x86_64 -m 1G -smp 2 -cpu host -M q35,accel=kvm \
... \
-chardev socket,id=char0,reconnect=0,path=/tmp/vhost4.socket \
-device vhost-user-vsock-pci,chardev=char0 -monitor stdio
# Guest listening
guest$ nc --vsock -l 1234
host$ nc -U /tmp/vm4.vsock
CONNECT 1234
# Host listening
host$ nc -l -U /tmp/vm4.vsock_1234
guest$ nc --vsock 2 1234
[1] https://github.com/stefano-garzarella/cloud-hypervisor.git
(vhost-user-vsock branch)
[2] https://github.com/firecracker-microvm/firecracker/blob/master/docs/vsock.md
Stefano Garzarella (3):
vhost-vsock: add vhost-vsock-common abstraction
virtio: add vhost-user-vsock base device
virtio: add vhost-user-vsock-pci device
configure | 3 +
include/hw/virtio/vhost-user-vsock.h | 36 ++++
include/hw/virtio/vhost-vsock-common.h | 47 ++++
include/hw/virtio/vhost-vsock.h | 11 +-
hw/virtio/vhost-user-vsock-pci.c | 84 ++++++++
hw/virtio/vhost-user-vsock.c | 188 ++++++++++++++++
hw/virtio/vhost-vsock-common.c | 258 ++++++++++++++++++++++
hw/virtio/vhost-vsock.c | 283 ++++---------------------
hw/virtio/Makefile.objs | 4 +-
9 files changed, 663 insertions(+), 251 deletions(-)
create mode 100644 include/hw/virtio/vhost-user-vsock.h
create mode 100644 include/hw/virtio/vhost-vsock-common.h
create mode 100644 hw/virtio/vhost-user-vsock-pci.c
create mode 100644 hw/virtio/vhost-user-vsock.c
create mode 100644 hw/virtio/vhost-vsock-common.c
--
2.25.4
