[Libvirt-cim] [PATCH 00/15] vlan extension

[Eduardo Lima (Etrunko)]

On 12/07/2011 07:18 AM, Wayne Xia wrote:
>   These patches would do following things: building up the network system CIM
> model, building up basic framework and functions below to implement the
> configuration, add the bridge and vlan802.1.q configuration capabilities in
> CIM model and library below.
>   Now this patch implement the functionalities with commandline style, which
> means it depends on command ip, ifconfig, brctl and /proc/net/vlan/. In this
> way it is very sensitive to these command's output format. Maybe another
> implemetion could avoid that in the future.

What exactly do you need with those commands. If we're talking about
listing network interfaces, obtaining IP/MAC addresses and like, this
all should be done via standard system calls instead of parsing command
line outputs. This is the basics of UNIX IPC mechanism. For instance see
socket(7), ip(7), netdevice(7) and related man pages, especially the
Ioctls sections.

>   Since libvirt-cim is not a daemon program that would always be brought up
> when the emulator was up, so there lacks a mechnism to save the configuration
> and set them when system reboot, so these patch uses system directory
> /etc/sysconfig/network-script/
> to store the settings.
>   The things above means that a linux kernel later than 2.6 and RedHat
> distribution is needed. Other distriution may work but not tested. If
> the implemention goes to libvirt the restrict would be removed.

Depending on a specific distro is very very bad. Again, what kind of
configuration are you trying to store? Could the infostore
implementation in libvirt-cim which could be used?

And this line about implementation going to libvirt really makes me sad.
IMHO, if there is work to be done in libvirt, so why don't start there
instead of implementing everything in house and having to do everything
once again when the necessary bits are there?


[snip]

> 
> Wayne Xia (15):
>   vlan extension - makefile change
>   vlan extension - CIM model - add class VESS
>   vlan extension - CIM model - add class VESSSD
>   vlan extension - CIM model - add class EthernetPort
>   vlan extension - CIM model - add class
>     EthernetPortAllocationSettingData
>   vlan extension - CIM model - add association Net_SettingsDeineState
>   vlan extension - CIM model - add association Net_SystemDevice
>   vlan extension - CIM model - add association Net_VESSSDComponent
>   vlan extension - CIM model - add association Net_ElementSettingData
>   vlan extension - CIM model - add core class VESSMS
>   vlan extension - CIM model - add help functions
>   vlan extension - function lib - add the API
>   vlan extension - function lib - add the core structure
>   vlan extension - function lib - add the helper functions
>   vlan extension - function lib - add the implemention of commandline
> 

For the series, looks like you sent the patches in the opposite order,
from last to first. If I apply the fist patch the build breaks. The
first review for this whole series is a -1 only because of that.

I think it would help a lot if you publish your code in gitorious for
instance. I have set up the mirrors for libvirt-cim repositories there:

http://gitorious.org/libvirt-cim

Finally, for future cases which involve huge amount of work, like this
one, *please please please* be gentle with us and avoid one big code
drop like this one. Small and incremental changes makes the life of
everyone, including yours, easier. :)

Best regards, Etrunko.

>  Makefile.am                                        |   16 +-
>  libxkutil/Makefile.am                              |   11 +-
>  libxkutil/host_network_API.c                       |  150 ++
>  libxkutil/host_network_API.h                       |   32 +
>  libxkutil/host_network_basic.c                     |  639 +++++++
>  libxkutil/host_network_basic.h                     |  166 ++
>  libxkutil/host_network_error.h                     |   28 +
>  libxkutil/host_network_helper.c                    |  659 +++++++
>  libxkutil/host_network_helper.h                    |  192 ++
>  libxkutil/host_network_implement_cmdline.c         | 2002 ++++++++++++++++++++
>  libxkutil/host_network_implement_cmdline.h         |   55 +
>  libxkutil/network_model.c                          |  466 +++++
>  libxkutil/network_model.h                          |  105 +

P.S.:
I haven't had the chance to review the patches yet. But I have a sudden
cold feeling in my spine by looking at these first stats.

-- 
Eduardo de Barros Lima
Software Engineer, Open Virtualization
Linux Technology Center - IBM/Brazil
eblima at br.ibm.com