Re: [Libvir] PATCH: Support serial & parallel devices in QEMU driver
On Wed, Apr 16, 2008 at 12:05:46AM +0200, Pau Garcia i Quiles wrote:
Quoting "Daniel P. Berrange" <berrange(a)redhat.com>:
Cool stuff. I've not read the patch because it's quite big but I've
got a couple of questions:
> - Run a TCP server and wait for clients to connect, using telnet
> protocol over wire:
>
> <serial type='tcp'>
> <source mode='bind' host='127.0.0.1' service='9999'
> wiremode='telnet'/>
> <target port='0'/>
> </serial>
>
> - Run a TCP client connecting to a remote host to send data in
> raw format:
>
> <serial type='tcp'>
> <source mode='connect' host='127.0.0.1'
service='9999'
> wiremode='raw'/>
> <target port='0'/>
> </serial>
1) Is any of those two an implementation of RFC 2217? ("Telnet Com
Port Control Option")
See the docs on -serial telnet in QEMU for a precise description:
http://fabrice.bellard.free.fr/qemu/qemu-doc.html#SEC10
"The telnet protocol is used instead of raw tcp sockets. The options
work the same as if you had specified -serial tcp. The difference is
that the port acts like a telnet server or client using telnet option
negotiation. This will also allow you to send the MAGIC_SYSRQ sequence
if you use a telnet that supports sending the break sequence. Typically
in unix telnet you do it with Control-] and then type "send break"
followed by pressing the enter key."
2) Will all this serial port "flavors" be available for all
drivers
(qemu, kvm, xen, etc) or will they all be available for Xen, then only
some for the other drivers?
KVM is part of the QEMU driver so yes. And I already mentioned that I intend
to add it to the Xen driver. Other drivers can use if it applicable - I
imagine the Solaris LDoms driver can use the TCP based syntax for its console
access.
Dan.
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