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Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_S
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net |
Date: |
Tue, 26 Jun 2018 17:17:32 +0200 |
On Tue, 26 Jun 2018 04:50:25 +0300
"Michael S. Tsirkin" <address@hidden> wrote:
> On Mon, Jun 25, 2018 at 10:54:09AM -0700, Samudrala, Sridhar wrote:
> > > > > > Might not neccessarily be something wrong, but it's very limited to
> > > > > > prohibit the MAC of VF from changing when enslaved by failover.
> > > > > You mean guest changing MAC? I'm not sure why we prohibit that.
> > > > I think Sridhar and Jiri might be better person to answer it. My
> > > > impression was that sync'ing the MAC address change between all 3
> > > > devices is challenging, as the failover driver uses MAC address to
> > > > match net_device internally.
> >
> > Yes. The MAC address is assigned by the hypervisor and it needs to manage
> > the movement
> > of the MAC between the PF and VF. Allowing the guest to change the MAC
> > will require
> > synchronization between the hypervisor and the PF/VF drivers. Most of the
> > VF drivers
> > don't allow changing guest MAC unless it is a trusted VF.
>
> OK but it's a policy thing. Maybe it's a trusted VF. Who knows?
> For example I can see host just
> failing VIRTIO_NET_CTRL_MAC_ADDR_SET if it wants to block it.
> I'm not sure why VIRTIO_NET_F_STANDBY has to block it in the guest.
>
So, what I get from this is that QEMU needs to be able to control all
of standby, uuid, and mac to accommodate the different setups
(respectively have libvirt/management software set it up). Is the host
able to find out respectively define whether a VF is trusted?
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, (continued)
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/22
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/22
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/22
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/22
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/22
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/22
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/22
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/23
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Samudrala, Sridhar, 2018/06/25
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/25
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net,
Cornelia Huck <=
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/26
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Cornelia Huck, 2018/06/26
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/26
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/26
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/26
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/27
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Samudrala, Sridhar, 2018/06/27
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Siwei Liu, 2018/06/27
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Michael S. Tsirkin, 2018/06/14
- Re: [Qemu-devel] [virtio-dev] Re: [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net, Cornelia Huck, 2018/06/15