在 2022/4/24 16:31, Xuan Zhuo 写道:
A separate reset queue function introduced by Virtqueue Reset. However, it is currently not defined what to do if the destination queue is being reset when virtio-net is steering in multi-queue mode. Fixes: https://github.com/oasis-tcs/virtio-spec/issues/138 Signed-off-by: Xuan Zhuo <xuanz...@linux.alibaba.com>
Reviewed-by: Jason Wang <jasow...@redhat.com>
--- content.tex | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/content.tex b/content.tex index 060bdab..61c36e8 100644 --- a/content.tex +++ b/content.tex @@ -4337,6 +4337,10 @@ \subsubsection{Control Virtqueue}\label{sec:Device Types / Network Device / Devi \field{virtqueue_pairs} once it has placed the VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET command in a used buffer.+If the destination receive queue is being reset (See \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / Virtqueue Reset}),+the device SHOULD re-select another random queue. If all receive queues are +being reset, the device MUST drop the packet. + \subparagraph{Legacy Interface: Automatic receive steering in multiqueue mode}\label{sec:Device Types / Network Device / Device Operation / Control Virtqueue / Automatic receive steering in multiqueue mode / Legacy Interface: Automatic receive steering in multiqueue mode} When using the legacy interface, transitional devices and drivers MUST format \field{virtqueue_pairs} @@ -4425,6 +4429,7 @@ \subsubsection{Control Virtqueue}\label{sec:Device Types / Network Device / Devi \item Calculate the hash of the packet as defined in \ref{sec:Device Types / Network Device / Device Operation / Processing of Incoming Packets / Hash calculation for incoming packets}. \item If the device did not calculate the hash for the specific packet, the device directs the packet to the receiveq specified by \field{unclassified_queue} of virtio_net_rss_config structure (value of 0 corresponds to receiveq1). \item Apply \field{indirection_table_mask} to the calculated hash and use the result as the index in the indirection table to get 0-based number of destination receiveq (value of 0 corresponds to receiveq1). +\item If the destination receive queue is being reset (See \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / Virtqueue Reset}), the device MUST drop the packet. \end{itemize}\paragraph{Offloads State Configuration}\label{sec:Device Types / Network Device / Device Operation / Control Virtqueue / Offloads State Configuration}
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