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Subject: [PATCH requirements 1/7] net-features: Add requirements document for release 1.4
Add requirements document template for the virtio net features. Add virtio net device counters visible to driver. Signed-off-by: Parav Pandit <parav@nvidia.com> --- net-workstream/features-1.4.md | 36 ++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 net-workstream/features-1.4.md diff --git a/net-workstream/features-1.4.md b/net-workstream/features-1.4.md new file mode 100644 index 0000000..03b4eb3 --- /dev/null +++ b/net-workstream/features-1.4.md @@ -0,0 +1,36 @@ +# 1. Introduction + +This document describes the overall requirements for virtio net device +improvements for upcoming release 1.4. Some of these requirements are +interrelated and influence the interface design, hence reviewing them +together is desired while updating the virtio net interface. + +# 2. Summary +1. Device counters visible to the driver + +# 3. Requirements +## 3.1 Device counters +1. The driver should be able to query the device and/or per vq counters for + debugging purpose using a control vq command. +2. The driver should be able to query which counters are supported using a + control vq command. +3. If this device is migrated between two hosts, the driver should be able + get the counter values in the destination host from where it was left + off in the source host. +4. If a virtio device is group member device, a group owner should be able + to query all the counter attributes using the admin queue command which + a virtio device will expose via a control vq to the driver. + +### 3.1.1 Per receive queue counters +1. le64 rx_oversize_pkt_errors: Packet dropped due to receive packet being + oversize than the buffer size +2. le64 rx_no_buffer_pkt_errors: Packet dropped due to unavailability of the + buffer in the receive queue +3. le64 rx_gro_pkts: Packets treated as guest GSO sequence by the device +4. le64 rx_pkts: Total packets received by the device + +### 3.1.2 Per transmit queue counters +1. le64 tx_bad_desc_errors: Descriptors dropped by the device due to errors in + descriptors +2. le64 tx_gso_pkts: Packets send as host GSO sequence +3. le64 tx_pkts: Total packets send by the device -- 2.26.2
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