[Qemu-devel] QEMU pipe implementation for Windows(host) Linux(guest) interaction

[Qemu-devel] QEMU pipe implementation for Windows(host) Linux(guest) interaction

[Jiahuan Zhang]

Dear QEMU developers,

I am a student working on the host-guest interaction for a Windows Host and
Linux Quest. Actually, I aim to make a universal pipe implementation for
any host-guest interaction.

I am now using a serial port to redirect to a pipe. This is working with
LInux host and Linux guest by using "mkfifo" to create the pipe. However, I
don't know how to create a pipe in Windows for QEMU usage.

Any thought is greatly appreciated!

best regards,
Jiahuan

Re: [Qemu-devel] QEMU pipe implementation for Windows(host) Linux(guest) interaction

[Daniel P. Berrange]

On Thu, Feb 23, 2017 at 08:45:17AM +0100, Jiahuan Zhang wrote:
> Dear QEMU developers,
> 
> I am a student working on the host-guest interaction for a Windows Host and
> Linux Quest. Actually, I aim to make a universal pipe implementation for
> any host-guest interaction.

FWIW, there's already two general purpose host<->guest communication
channels for QEMU - virtio-serial (like a traditional serial port
but giving them names & allowing many to be create) and virtio-vsock
(like UNIX domain sockets, but across host/guest - alternatively like
TCP/IP sockets, but without network devices involved)

> I am now using a serial port to redirect to a pipe. This is working with
> LInux host and Linux guest by using "mkfifo" to create the pipe. However, I
> don't know how to create a pipe in Windows for QEMU usage.

IIUC, you don't need to pre-create the pipe on Windows with QEMU chardevs.
It looks like the code takes the filename you set, appends ".pipe" and
then calls CreateNamedPipe to create it pipe.

Regards,
Daniel
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