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Re: [libvirt] [PATCH 1/2] ESX: Add routines to interface driver



On 07/24/2012 03:26 PM, Matthias Bolte wrote:
> 2012/7/23 Laine Stump <laine laine org>:
>> On 07/20/2012 05:20 PM, Ata E Husain Bohra wrote:
>>> Add following routines to esx_interface_driver:
>>>     esxNumOfInterfaces,
>>>     esxNumOfDefinedInterfaces,
>>>     esxListInterfaces,
>>>     esxListDefinedInterfaces,
>>>     esxInterfaceLookupByMACString,
>>>     esxInterfaceGetXMLDesc,
>>>     esxInterfaceUndefine,
>>>     esxInterfaceCreate,
>>>     esxInterfaceDestroy
>>>
>>> Signed-off-by: Ata E Husain Bohra <ata husain hotmail com>
>>> ---
>>>  src/esx/esx_interface_driver.c |  506 +++++++++++++++++++++++++++++++++++++++-
>>>  src/esx/esx_vi.c               |  126 ++++++++++
>>>  src/esx/esx_vi.h               |   10 +
>>>  src/esx/esx_vi_generator.input |  227 ++++++++++++++++++
>>>  src/esx/esx_vi_generator.py    |   31 ++-
>>>  src/esx/esx_vi_types.c         |   18 +-
>>>  6 files changed, 913 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/src/esx/esx_interface_driver.c b/src/esx/esx_interface_driver.c
>>> index 5713137..b1ba5e2 100644
>>> --- a/src/esx/esx_interface_driver.c
>>> +++ b/src/esx/esx_interface_driver.c
>>> @@ -23,6 +23,9 @@
>>>   */
>>>
>>>  #include <config.h>
>>> +#include <sys/socket.h>
>>> +#include <netinet/in.h>
>>> +#include <arpa/inet.h>
>>>
>>>  #include "internal.h"
>>>  #include "util.h"
>>> @@ -34,6 +37,7 @@
>>>  #include "esx_vi.h"
>>>  #include "esx_vi_methods.h"
>>>  #include "esx_util.h"
>>> +#include "interface_conf.h"
>>>
>>>  #define VIR_FROM_THIS VIR_FROM_ESX
>>>
>>> @@ -67,10 +71,508 @@ esxInterfaceClose(virConnectPtr conn)
>>>
>>>
>>>
>>> +static int
>>> +esxNumOfInterfaces(virConnectPtr conn)
>>> +{
>>> +    esxPrivate *priv = conn->interfacePrivateData;
>>> +    esxVI_HostVirtualNic *virtualNicList = NULL;
>>> +    const esxVI_HostVirtualNic *virtualNic = NULL;
>>
>> It's a bit disconcerting to see these called "virtual" NICs, when
>> virInterface is all about configuring interfaces on the *physical* host.
> This i my biggest concern here too, and also that's the reason why I
> didn't implement the network driver yet. Because I'm not sure what is
> the proper mapping between libvirt and vSphere API here.
>
> As far as I understand this, a HostVirtualNic seems to be the best
> match for a virInterface. A HostVirtualNic is connected to
> HostVirtualSwitch, that is connected to the physical network via a
> PhysicalNic. There is not much one can do about the PhysicalNic. It
> just sits there and is connected to the HostVirtualSwitch. The
> HostVirtualNic is also the one that has the external IP address of the
> ESX server assigned.


Ah, okay. So if I understand correctly, a PhysicalNic is just the bare
hardware, and any configuration applied to that hardware is abstracted
as a separate VirtualNic. Strange, but.. okay.



> Also a HostVirtualNic is not part of the virtual hardware of a VM. A
> VirtualEthernetCard is the type in the vSphere API representing the
> virtual network interface of a virtual machine

Clear as mud! :-)

Anyway, at least people using libvirt to manage their vSphere nodes
won't have to deal with that confusion.


>
>> Being unfamiliar with the vmware API, I'm not sure which of these
>> functions are things you've added to libvirt and which are part of
>> vmware, but please rename any that are defined in libvirt to use
>> "physical" or "host" or "p/h" as appropriate, rather than "virtual"
>> and/or "v". We want to make sure nobody gets the wrong idea about these
>> functions.
> I don't think that this is a good idea, we should really stick exactly
> to the naming of things in the vSphere API otherwise there will be
> much more confusion.

After reading your explanation, I agree.


>
> Therefore,
>
>   esxVI_HostVirtualNic *virtualNicList = NULL;
>
> should be
>
>   esxVI_HostVirtualNic *hostVirtualNicList = NULL;
>
> Apart from that I'll do a more detailed review soon.
>


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