Network communications for operating system partitions

• US 7,697,536 B2
• Filed: 04/01/2005
• Issued: 04/13/2010
• Est. Priority Date: 04/01/2005
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Lucke, Kyle A., Willenborg, Scott Michael, Chang, Chih-jen, Damon, Philippe, Vaidhyanathan, Natarajan, Calvignac, Jean Louis, Verplanken, Fabrice Jean, Basso, Claude, Verrilli, Colin Beaton, Kiel, Harvey G., Fuhs, Ronald Edward
• Primary Examiner(s): Yao; Kwang B
• Assistant Examiner(s): BOKHARI, SYED M
• Application Number:
  US11/097,051
• Publication Number:
  US 20060221961A1
• Time in Patent Office: 1,838 Days
• Field of Search: 370/392, 370/254, 370/351, 370/400, 370/390, 370/410, 370/389, 370/401, 370/395, 370/60, 370/394, 709/250, 709/230, 711/114, 711/1, 365/200, 718/102
• US Class Current: 370/394
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

Providing communications between operating system partitions and a computer network. In one aspect, an apparatus for distributing network communications among multiple operating system partitions includes a physical port allowing communications between the network and the computer system, and logical ports associated with the physical port, where each logical port is associated with one of the operating system partitions. Each of the logical ports enables communication between a physical port and the associated operating system partition and allows configurability of network resources of the system. Other aspects include a logical switch for logical and physical ports, and packet queues for each connection and for each logical port.

Claims

1. A method for distributing network communications on a computer system, the method comprising:

receiving a data packet at a logical switch in the computer system, wherein the data packet includes a packet control descriptor the packet control descriptor comprising a packet status wherein the packet status comprises a normal status, a force out status wherein the force out status indicates that the data packet has been modified to automatically be sent out to a physical port or a re-circulate status wherein the re-circulate status is a status whereby the packet has been designated for a wrap path, the computer system running multiple operating system partitions;

wrapping the data packet from one operating system partition of the computer system to another operating system partition of the computer system through a hardware path internal to the computer system when information in the packet indicates a wrap path; and

sending the data packet received from an operating system partition to a physical port coupled to an external network, or received from the external network to an operating system partition, when information in the data packet indicates a non-wrap path.

2. The method of claim 1 wherein the computer system includes at least one physical port coupled to the external network, and wherein each operating system partition has one or more logical ports for sending and receiving data, such that the logical ports and an associated physical port act as virtual ports which are selected by the logical switch to send the data packet therethrough.

3. The method of claim 1 wherein the information in the data packet includes a destination address and a packet control descriptor.

4. The method of claim 3 wherein the data packet is one of a unicast packet, a multicast packet, and a broadcast packet.

5. The method of claim 4 wherein if the data packet is a unicast packet, the destination address of the data packet is checked to determine whether to send the data packet to an internal operating system partition or to a destination on the external network.

6. The method of claim 4 wherein if the data packet is a multicast packet or a broadcast packet, the data packet is sent to a multicast/broadcast manager implemented on the computer system.

7. The method of claim 6 wherein the multicast/broadcast manager duplicates the data packet for any additional destinations for the packet, and changes the packet control descriptor for the data packet and for any duplicated data packets to indicate that they have been processed by the multicast/broadcast manager, and outputs the data packet and any duplicated data packets such that they are sent to appropriate destinations of the computer system and the external network.

8. The method of claim 7 wherein if a data packet received by the multicast/broadcast manager is to be sent to an operating system partition of the computer system, the multicast/broadcast manager adds a tag to the data packet indicating the particular operating system partition to which to send the data packet.

9. The method of claim 6 wherein if the received data packet is a multicast packet or a broadcast packet and the packet control descriptor indicates the data packet is a force out packet as designated by the multicast/broadcast manager, the data packet is sent to a destination on the external network.

10. The method of claim 6 wherein if the received data packet is a multicast packet or a broadcast packet and the packet control descriptor indicates the data packet is a recirculate packet as designated by the multicast/broadcast manager, the data packet is sent to an operating system partition of the computer system as indicated by a tag associated with the data packet and provided by the multicast/broadcast manager.

11. A method for providing network communications for a computer system, the method comprising:

receiving a data packet at a network adapter wherein the data packet includes a packet control descriptor the packet control descriptor comprising a packet status wherein the packet status comprises a normal status, a force out status wherein the force out status indicates that the data packet has been modified to automatically be sent out to a physical port or a re-circulate status;

checking whether the data packet is a re-circulated packet, wherein a re-circulated packet is a packet that has been designated for a wrap path;

storing the data packet in one of a plurality of connection queues, the connection queues for storing data packets that are to be sent from or received by at least one process in at least one user space of the computer system via associated network connections; and

storing the data packet in a default operating system queue if no network connection can be found for the data packet, the default operating system queue for storing data packets that are to be sent from or received by a kernel of an operating system partition implemented by the computer system.

12. The method of claim 11 wherein the network connections are provided between the at least one process and a network, wherein at least one physical port of the computer system is coupled to the network, the at least one physical port allowing communications between the network and the computer system.

13. The method of claim 11 wherein the computer system provides multiple operating system partitions and a logical port associated with each of the operating system partitions, wherein each logical port has an associated default operating system queue such that data packets stored in a default operating system queue are to be sent from or received by a kernel of the associated operating system partition.

14. The method of claim 11 further comprising storing the data packet in a special default queue if the data packet cannot be stored in a connection queue or default operating system queue.

15. The method of claim 11 further comprising storing the data packet in a special multicast or broadcast default queue if the data packet is a multicast or broadcast packet, respectively.

16. The method of claim 15 wherein the data packets in the multicast and broadcast special default queues are provided to a multicast/broadcast manager implemented on the computer system, wherein the multicast/broadcast manager duplicates the data packet and outputs the data packet and duplicate data packets to be sent to a plurality of destinations.

17. The method of claim 11 wherein at least one process in the user space has a plurality of network connections and is serviced by the connection queues associated with those network connections.