From: Chris Friesen <chris.friesen@genband.com>
To: Don Dutile <ddutile@redhat.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>,
David Miller <davem@davemloft.net>,
yuvalmin@broadcom.com, gregory.v.rose@intel.com,
netdev@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: New commands to configure IOV features
Date: Mon, 23 Jul 2012 09:09:38 -0600 [thread overview]
Message-ID: <500D6932.8090306@genband.com> (raw)
In-Reply-To: <500D59BF.9040006@redhat.com>
On 07/23/2012 08:03 AM, Don Dutile wrote:
> On 07/20/2012 07:42 PM, Chris Friesen wrote:
>>
>> I actually have a use-case where the guest needs to be able to modify
>> the MAC addresses of network devices that are actually VFs.
>>
>> The guest is bonding the network devices together, so the bonding
>> driver in the guest expects to be able to set all the slaves to the
>> same MAC address.
>>
>> As I read the ixgbe driver, this should be possible as long as the
>> host hasn't explicitly set the MAC address of the VF. Is that correct?
>>
>> Chris
>
> Interesting tug of war: hypervisors will want to set the macaddrs for
> security reasons,
> some guests may want to set macaddr for
> (valid?) config reasons.
>
In our case we have control over both guest an host anyways, so it's
less of a security issue. In the general case though I could see it
being an interesting problem.
Back to the original discussion though--has anyone got any ideas about
the best way to trigger runtime creation of VFs? I don't know what the
binary APIs looks like, but via sysfs I could see something like
echo number_of_new_vfs_to_create >
/sys/bus/pci/devices/<address>/create_vfs
Something else that occurred to me--is there buy-in from driver
maintainers? I know the Intel ethernet drivers (what I'm most familiar
with) would need to be substantially modified to support on-the-fly
addition of new vfs. Currently they assume that the number of vfs is
known at module init time.
Chris
next prev parent reply other threads:[~2012-07-23 15:09 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-07 11:17 New commands to configure IOV features Yuval Mintz
2012-05-07 15:16 ` Greg Rose
2012-06-26 12:21 ` Yuval Mintz
2012-06-26 16:13 ` Alexander Duyck
2012-06-26 17:19 ` Greg Rose
2012-07-01 11:09 ` Yuval Mintz
2012-07-09 18:39 ` Ben Hutchings
2012-07-09 21:13 ` Chris Friesen
2012-07-16 9:19 ` Yuval Mintz
2012-07-17 19:29 ` Don Dutile
2012-07-17 21:08 ` Chris Friesen
2012-07-17 21:11 ` David Miller
2012-07-20 15:27 ` Chris Friesen
2012-07-20 15:56 ` Don Dutile
2012-07-20 17:42 ` Ben Hutchings
2012-07-20 19:29 ` Chris Friesen
2012-07-20 20:01 ` Ben Hutchings
2012-07-20 20:15 ` Don Dutile
2012-07-20 23:42 ` Chris Friesen
2012-07-21 0:52 ` Rose, Gregory V
2012-07-23 14:03 ` Don Dutile
2012-07-23 15:09 ` Chris Friesen [this message]
2012-07-23 17:06 ` Rose, Gregory V
2012-07-23 18:36 ` Stephen Hemminger
2012-07-23 18:40 ` Rose, Gregory V
2012-09-19 11:07 ` Yuval Mintz
2012-09-19 15:53 ` Greg Rose
2012-09-19 19:44 ` Ben Hutchings
2012-09-19 22:17 ` Yinghai Lu
2012-09-19 22:46 ` Ben Hutchings
2012-09-20 0:19 ` Yinghai Lu
2012-09-20 1:23 ` Ben Hutchings
2012-09-20 2:27 ` Yinghai Lu
2012-09-20 3:08 ` Subhendu Ghosh
2012-09-20 15:39 ` Rose, Gregory V
2012-09-20 15:39 ` Rose, Gregory V
2012-09-21 5:50 ` Yinghai Lu
2012-09-21 17:35 ` Ben Hutchings
2012-09-21 19:23 ` Yinghai Lu
2012-09-21 18:06 ` Don Dutile
2012-09-21 18:06 ` Don Dutile
2012-09-21 19:49 ` Yinghai Lu
2012-09-21 20:08 ` Don Dutile
2012-09-21 20:08 ` Don Dutile
2012-09-23 15:49 ` Yuval Mintz
2012-09-24 17:37 ` Don Dutile
2012-09-24 17:37 ` Don Dutile
2012-09-30 6:39 ` Yuval Mintz
2012-10-01 14:12 ` Don Dutile
2012-10-01 14:12 ` Don Dutile
2012-09-19 17:49 ` David Miller
2012-07-23 16:37 ` Rose, Gregory V
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