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Subject: [PATCH] content: Introduce VIRTIO_NET_F_STANDBY feature
VIRTIO_NET_F_STANDBY feature enables hypervisor to indicate virtio_net driver to act as a standby for another device with the same MAC address. Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com --- content.tex | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/content.tex b/content.tex index be18234..010b6ee 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)] Driver acts as standby for another + device with the same MAC \end{description} \subsubsection{Feature bit requirements}\label{sec:Device Types / Network Device / Feature bits / Feature bit requirements} @@ -2636,6 +2639,13 @@ 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 VIRTIO_NET_F_STANDBY feature if the device offers it. + +If the driver negotiates VIRTIO_NET_F_STANDBY, it should act as a standby for +another device with the same MAC address when available. The hypervisor can +hot-plug a primary device with same MAC address if the feature is successfully +negotiated with the driver. + \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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