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Date: Wed, 25 Feb 2009 01:58:58 -0800 (PST)
From: En-Hua Cecilia Hu <eh146360@sac.sfbay.sun.com>
Message-Id: <200902250958.n1P9wwVf017292@sac.sfbay.sun.com>
To: PSARC-record@sac.sfbay.sun.com
Subject: VLAN ID for Virtual Interface [PSARC/2009/138 FastTrack timeout 03/04/2009]
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Template Version: @(#)sac_nextcase 1.68 02/23/09 SMI
This information is Copyright 2009 Sun Microsystems
1. Introduction
    1.1. Project/Component Working Name:
	 VLAN ID for Virtual Interface
    1.2. Name of Document Author/Supplier:
	 Author:  Max Zhen
    1.3  Date of This Document:
	25 February, 2009
4. Technical Description
    See the case directory for more detail

6. Resources and Schedule
    6.4. Steering Committee requested information
   	6.4.1. Consolidation C-team Name:
		ON
    6.5. ARC review type: FastTrack
    6.6. ARC Exposure: open


From Cecilia.Hu@sun.com Wed Feb 25 02:57:51 2009
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Date: Wed, 25 Feb 2009 18:55:36 +0800
From: Cecilia Hu <Cecilia.Hu@sun.com>
Subject: PSARC 2009/138 VLAN ID for virtual interface
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Cc: Max Zhen <Max.Zhen@sun.com>
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I am sponsoring this case for Max Zhen. The requested release binding is 
minor, timer is set to 03/04/2009.

All documents are in case directory for your reference.

-Cecilia




This information is Copyright 2009 Sun Microsystems
1. Introduction
     1.1. Project/Component Working Name:
      VLAN ID for virtual interface
     1.2. Name of Document Author/Supplier:
      Author:  Max Zhen
     1.3  Date of This Document:
      25 February, 2009

4. Technical Description

4.1.  Summary

In this fast-track, we plan to support setting VLAN ID for virtual
network interfaces attached to a guest domain running on Xen hypervisor.

Minor release binding is requested.


4.2.  Discussion

Associating a VLAN ID to an interface serving as a back end device for a
guest domain has been highly desired in that it can separate the guest
domains network traffic from each other, and from the dom0's traffic.
Thus, each traffic can be managed more precisely and easily and can get
more protection.

After Crossbow(PSARC/2006/357)'s integration into Nevada, it's possible
to support specifying VLAN ID while setting up a VNIC as back end NIC
device attached to a guest domain from within Solaris dom0 by issuing
appropriate dladm(1M) command.

In this fast-track, we plan to enhance existing management tools to
leverage dladm(1M) and its '-v' option to set VLAN ID for virtual
network interfaces for guest domains running on top of Xen hypervisor.

With the integration of porting Solaris to run on Xen (PSARC/2006/260),
three external management tools are also ported and integrated into
Solaris: virsh(1M)(PSARC 2007/157), xm(1M)(PSARC/2006/260) and
virt-install(1M)(LSARC/2007/175).  Virsh(1M) and xm(1M) commands are
user interfaces of domain management and virt-install(1M) are used to
install guest domains.  These three tools currently have user interfaces
for specifying configurations for virtual interfaces for a guest domain.
So, they are going to be enhanced to support specifying bandwidth limit
while defining a configuration of a virtual network interface.  I will
discuss about each of them in following sections.

Note: please refer to the design doc[1] in case directory for detailed
       information.


4.2.1 Management tool architecture

The architecture of management tools for virtual network interface can
be illustrated as below:
        virsh ---------+
                       v
virt-install ----> virtd
                       |
                       V
                      xend --> vif-vnic/vif-dedicated
                       ^
           xm ---------+
So, from above graph, we can see that virtual interface configuration
will be passed to xend(1M) directly by xm.  While, configuration will be
passed to virtd (see PSARC 2008/165), who will pass it to xend.  But, no
matter where does the configuration come from, xend will collect all
configuration and pass them to either /usr/lib/xen/scripts/vif-vnic or
/usr/lib/xen/scripts/vif-dedicated, which are shell scripts to set up
back end NIC device based on the configuraion for the corresponding
virtual interface of the guest domain.


4.2.2 Xm(1M)

There are two ways for end user to provide VLAN ID information to xm:
+ via 'xm network-attach' command line
+ via '.py' configuration file

In order to support specifying VLAN ID in 'xm network-attach' command
line, we need to extend the current command line syntax to add 'vlanid'
option:
vlanid=<vid>
When attaching a virtual NIC device using 'xm network-attach' to a guest
domain, user can specify VLAN ID like below:
# xm network-attach domu vlanid=1

We also create a property named 'vlanid' to represent VLAN ID of a
virtual network interface in a '.py' configuration file and modify xend
to be able to parse it.  For example:
[...cut...]
vif = [ 'bridge=bge0,vlanid=1' ]
[...cut...]

Once 'vlanid' property is parsed in xend correctly, xend will pass VLAN
ID to vif-vnic script, where VNIC will be set up using appropriate dladm
command with this VLAN ID from xend.

So, we also need to enhance vif-vnic script to be able to parse out VLAN
ID from configuration from xend and issue appropriate dladm command to
set VLAN ID with '-v' option while setting up corresponding VNIC serving
as the back end device for the virtual network interface.

Note: please refer to the xm.man.diff.vid.txt[2] in case directory for
       the difference.


4.2.3 Virsh(1M)

There are two ways for end user to provide VLAN ID information to virsh:
+ via 'virsh attach-interface' command line
+ via guest domain configuration file in XML format
But, neither of them support specifying VLAN ID information.  So, we
need to enhance both of them.

We need to add one more option - "--vlanid" to 'virsh attach-interface'
command line syntax to allow end user to provide VLAN ID while
adding(attaching) a new virtual interface to a guest domain:
--vlanid <vid>

'Virsh create' and 'virsh define' are two commands that interact with
XML format guest domain configuration file as a whole.  So, we also need
to extend current configuration file format to allow end user to provide
VLAN ID.

In order to insert VLAN ID information into XML file, we create a new
element, "vlan", inside "interface" element.  Users provide VLAN ID by
setting "id" attribute of "vlan" element with a valid VLAN ID.  For
example:
[...cut...]
     <interface type='bridge'>
       <source bridge='e1000g1'/>
       <vlan id='1'/>
     </interface>
[...cut...]

Note: please refer to the virsh.man.diff.vid.txt[3] in case directory
       for the difference.


4.2.4 virt-install(1M)

Virt-install currently does not support specifying VLAN ID.  We need to
extend its command line syntax to allow it to be specified by end users.

We will add one more property, "vlanid=<vid>", to "-w/--network" option
for user to specify VLAN ID for the corresponding interface.  We will
only support specifying VLAN ID as an property, not as an option.

Please refer to PSARC/2009/137 for more info about -w/--network option
changes.

Note: please refer to the virt-install.man.diff.vid.txt[4] in case
       directory for the difference.


4.3.  Interfaces

Exported interfaces:
-------------------------------------------------------------------+
| Interface			| Stability	| Comments         |
+-------------------------------+---------------+------------------+
| --vlanid option for virsh(1M)	| Uncommitted	|                  |
|				|		|                  |
| 'vlanid' property of -w/--network|		|                  |
| option of virt-install(1M)	| Volatile	|                  |
|				|		|                  |
| "vlan" element in XML		|		|                  |
| configuration file		| Uncommitted	|                  |
|				|		|                  |
| 'vlanid' option for xm(1M)	| Volatile	|                  |
|				|		|                  |
| 'vlanid' property in '.py'	|		|                  |
| configuration file		| Volatile	|                  |
|				|		|                  |
| VLAN ID representation	|		|                  |
| from xend(1M) (in xenstore)	|Project Private|                  |
+-------------------------------+---------------+------------------+

Imported interfaces:
-------------------------------------------------------------------+
| Interface			| Stability	| Comments         |
+-------------------------------+---------------+------------------+
| dladm(1M)			| Committed	|                  |
+-------------------------------+---------------+------------------+

5.  References

PSARC 2006/260 Solaris on Xen
PSARC 2006/357 Crossbow - Network Virtualization and Resource Management
PSARC 2007/157 libvirt - a LGPL library to control guest domains
PSARC 2008/165 xVM Hypervisor Remote Access (virtd)
LSARC 2007/175 Virtual Machine Manager
PSARC 2009/137 Bandwidth limit for virtual interface

6. Resources and Schedule
     6.4. Steering Committee requested information
        6.4.1. Consolidation C-team Name:
         ON
     6.5. ARC review type:
         FastTrack
     6.6. ARC Exposure:
         open


FOOTNOTE:
=========
[1] design doc: 
http://sac.eng/Archives/CaseLog/arc/PSARC/2009/138/spec/design.vid.txt
[2] xm.man.diff.bw.txt: 
http://sac.eng/Archives/CaseLog/arc/PSARC/2009/138/spec/xm.man.diff.vid.txt
[3] virsh.man.diff.bw.txt: 
http://sac.eng/Archives/CaseLog/arc/PSARC/2009/138/spec/virsh.man.diff.vid.txt
[4] virt-install.man.diff.bw.txt 
http://sac.eng/Archives/CaseLog/arc/PSARC/2009/138/spec/virt-install.man.diff.vid.txt


From carlsonj@phorcys.east.sun.com Wed Feb 25 07:28:36 2009
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Date: Wed, 25 Feb 2009 10:28:20 -0500
From: James Carlson <james.d.carlson@sun.com>
Subject: Re: PSARC 2009/138 VLAN ID for virtual interface
In-reply-to: <49A523A8.6010305@sun.com>
To: Cecilia.Hu@sun.com
Cc: psarc-ext@sun.com, Max Zhen <Max.Zhen@sun.com>
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Cecilia Hu writes:
> I am sponsoring this case for Max Zhen. The requested release binding is 
> minor, timer is set to 03/04/2009.

Similar questions apply to this project as apply to '/137.  Unless I'm
missing something, they appear to be things that probably should have
been filed as one case.

-- 
James Carlson, Solaris Networking              <james.d.carlson@sun.com>
Sun Microsystems / 35 Network Drive        71.232W   Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757   42.496N   Fax +1 781 442 1677

From Max.Zhen@sun.com Wed Feb 25 18:29:21 2009
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Date: Thu, 26 Feb 2009 10:24:10 +0800
From: Max Zhen <Max.Zhen@sun.com>
Subject: Re: PSARC 2009/138 VLAN ID for virtual interface
In-reply-to: <18853.25492.465163.349398@gargle.gargle.HOWL>
Sender: Max.Zhen@sun.com
To: James Carlson <James.D.Carlson@sun.com>
Cc: Cecilia.Hu@sun.com, psarc-ext@sun.com
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James Carlson  wrote:
> Cecilia Hu writes:
>   
>> I am sponsoring this case for Max Zhen. The requested release binding is 
>> minor, timer is set to 03/04/2009.
>>     
>
> Similar questions apply to this project as apply to '/137.
Below are the new commitment levels based on our discussion in 2009/137:

----------------------------------------------------------------------------
| Interface			| Stability	| Comments		   |
+-------------------------------+---------------+--------------------------+
| --vlanid option for virsh(1M)	| Committed	|                          |
|				|		|			   |
| 'vlanid' property of -w/--network|		|			   |
| option of virt-install(1M)	| Committed	|			   |
|				|		|			   |
| "vlan" element in XML		|		|			   |
| configuration file		| Committed	|			   |

>   Unless I'm
> missing something, they appear to be things that probably should have
> been filed as one case.
>
>   
I'm fine with either way. How to merge them into one case now?

Max

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Date: Thu, 26 Feb 2009 08:29:00 -0500
From: James Carlson <james.d.carlson@sun.com>
Subject: Re: PSARC 2009/138 VLAN ID for virtual interface
In-reply-to: <49A5FD4A.4090808@Sun.COM>
To: Max Zhen <Max.Zhen@sun.com>
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Max Zhen writes:
> >   Unless I'm
> > missing something, they appear to be things that probably should have
> > been filed as one case.
> >
> >   
> I'm fine with either way. How to merge them into one case now?

As long as we converge on the shared issues, I'm ok with them being
separate.  I'm just surprised that they're treated as separate
projects even though they're proposing nearly identical and related
changes at exactly the same time.

-- 
James Carlson, Solaris Networking              <james.d.carlson@sun.com>
Sun Microsystems / 35 Network Drive        71.232W   Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757   42.496N   Fax +1 781 442 1677

From Cecilia.Hu@sun.com Mon Mar  2 22:28:55 2009
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Date: Tue, 03 Mar 2009 14:26:37 +0800
From: Cecilia Hu <Cecilia.Hu@sun.com>
Subject: Re: PSARC 2009/138 VLAN ID for virtual interface
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Based on current discussion here, the specification is updated.

-Cecilia

From carlsonj@phorcys.east.sun.com Wed Mar  4 09:35:11 2009
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Date: Wed, 04 Mar 2009 12:35:01 -0500
From: James Carlson <james.d.carlson@sun.com>
Subject: Re: PSARC 2009/138 VLAN ID for virtual interface
In-reply-to: <49ACCD9D.4030806@sun.com>
To: Cecilia.Hu@sun.com
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Cecilia Hu writes:
> Based on current discussion here, the specification is updated.

+1

-- 
James Carlson, Solaris Networking              <james.d.carlson@sun.com>
Sun Microsystems / 35 Network Drive        71.232W   Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757   42.496N   Fax +1 781 442 1677

From Cecilia.Hu@sun.com Wed Mar  4 19:25:57 2009
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Date: Thu, 05 Mar 2009 11:23:42 +0800
From: Cecilia Hu <Cecilia.Hu@sun.com>
Subject: Re: PSARC 2009/138 VLAN ID for virtual interface
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This case was approved in today's PSARC meeting.

-Cecilia

