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Subject: [PATCH v4] content: Introduce VIRTIO_NET_F_STANDBY feature
VIRTIO_NET_F_STANDBY feature enables hypervisor to indicate virtio_net device to act as a standby for another device with the same MAC address. Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Fixes: https://github.com/oasis-tcs/virtio-spec/issues/18 --- content.tex | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/content.tex b/content.tex index be18234..42a0e7e 100644 --- a/content.tex +++ b/content.tex @@ -2525,6 +2525,9 @@ features. \item[VIRTIO_NET_F_CTRL_MAC_ADDR(23)] Set MAC address through control channel. + +\item[VIRTIO_NET_F_STANDBY(62)] Device may act as a standby for a primary + device with the same MAC address. \end{description} \subsubsection{Feature bit requirements}\label{sec:Device Types / Network Device / Feature bits / Feature bit requirements} @@ -2614,6 +2617,9 @@ level ethernet header length) size with \field{gso_type} NONE or ECN, and do so without fragmentation, after VIRTIO_NET_F_MTU has been successfully negotiated. +If the driver negotiates the VIRTIO_NET_F_STANDBY feature, the device MAY act +as a standby device for a primary device with the same MAC address. + \drivernormative{\subsubsection}{Device configuration layout}{Device Types / Network Device / Device configuration layout} A driver SHOULD negotiate VIRTIO_NET_F_MAC if the device offers it. @@ -2636,6 +2642,8 @@ If the driver negotiates VIRTIO_NET_F_MTU, it MUST NOT transmit packets of size exceeding the value of \field{mtu} (plus low level ethernet header length) with \field{gso_type} NONE or ECN. +A driver SHOULD negotiate the VIRTIO_NET_F_STANDBY feature if the device offers it. + \subsubsection{Legacy Interface: Device configuration layout}\label{sec:Device Types / Network Device / Device configuration layout / Legacy Interface: Device configuration layout} \label{sec:Device Types / Block Device / Feature bits / Device configuration layout / Legacy Interface: Device configuration layout} When using the legacy interface, transitional devices and drivers -- 2.14.4
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