Remote direct memory access based networking gateway

1. A system comprising:

a memory including a first plurality of rings;

an endpoint associated with a ring of the plurality of rings; and

a gateway configured to:

receive a packet address of a packet;

locate the endpoint, wherein the endpoint is associated with the packet based on destination address information in the packet;

issuing, by the gateway, an RDMA read request to the endpoint to retrieve the packet, wherein the packet is made available in a slot in the ring at the endpoint;

temporarily storing the packet at the gateway; and

issuing, by the gateway, an RDMA write request to indicate that the slot can be reused.

2. The system of claim 1 , wherein the rings are virtIO rings.

3. The system of claim 1 , wherein the destination address information is stored in a packet header.

4. The system of claim 1 , wherein an endpoint address of the endpoint is a MAC address.

5. The system of claim 1 , wherein the gateway is further configured to notify the endpoint that the packet has been sent.

6. The method of claim 5 , wherein notifying the endpoint includes issuing, by the gateway, a SEND message to the endpoint.

7. The system of claim 1 , further comprising a second endpoint and wherein each endpoint is assigned a unique MAC address or MAC layer.

8. A non-transitory machine-readable medium storing code, which when executed by a gateway, is configured to cause the gateway to:

receive a notification from an endpoint regarding a packet made available in a ring associated with the endpoint;

access the ring with an RDMA read request;

retrieve the packet made available in the ring; and

forward the packet on an external network.

9. The non-transitory machine-readable medium of claim 8 , wherein the gateway is configured to store the packet in a slot of the ring, and wherein the ring is an available virtIO ring.

10. The non-transitory machine-readable medium of claim 9 , wherein the gateway is configured to write the packet into a used virtIO ring to notify the endpoint that packet in the slot has been transferred.

11. The non-transitory machine-readable medium of claim 10 , wherein the gateway is configured to store a different packet in the slot.

12. The non-transitory machine-readable medium of claim 8 , wherein the gateway is configured to detect a state of the endpoint.

13. The non-transitory machine-readable medium of claim 12 , wherein the state is an idle state.

14. The non-transitory machine-readable medium of claim 13 , wherein the gateway is configured to enable notifications responsive to detecting that the endpoint is in an idle state.

15. The non-transitory machine-readable medium of claim 13 , wherein the gateway is configured to stop polling the ring associated with the endpoint responsive to detecting that the endpoint is in an idle state.

16. The non-transitory machine-readable medium of claim 13 , wherein the gateway is configured to wake up the endpoint in the idle state.

17. The non-transitory machine-readable medium of claim 16 , wherein waking up the endpoint includes sending a message to the endpoint.

18. The non-transitory machine-readable medium of claim 8 , wherein the gateway is configured to poll the ring associated with the endpoint.

19. A non-transitory machine-readable medium storing code, which when executed by a gateway, is configured to cause the gateway to:

receive a packet address of a packet;

locate an endpoint, wherein the endpoint is associated with the packet based on destination address information in the packet;

issue an RDMA read request to the endpoint to retrieve the packet, wherein the packet is made available in a slot in a ring at the endpoint;

temporarily store the packet at the gateway; and

issue an RDMA write request to indicate that the slot can be reused.

20. The non-transitory machine-readable medium of claim 19 , wherein at least one of the rings are virtIO rings, the destination address information is stored in a packet header, an endpoint address of the endpoint is a MAC address, or the RDMA read request is issued to a used virtIO ring.