Apparatus, system, and method for isolating a storage application from a network interface driver

• US 8,239,884 B2
• Filed: 06/19/2008
• Issued: 08/07/2012
• Est. Priority Date: 08/03/2004
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Cheng, Tu-An, Ju, Jialin, Lindley, John Earle, Scales, William James, Haltore, Kiron
• Primary Examiner(s): Ho, Andy
• Assistant Examiner(s): SEYE, ABDOU K
• Application Number:
  US12/142,341
• Publication Number:
  US 20080244621A1
• Time in Patent Office: 1,510 Days
• Field of Search: 719/326
• US Class Current: 719/326
• CPC Class Codes: G06F 13/387 for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system

Abstract

An apparatus and system are provided for isolating a storage application from a network interface driver. The apparatus includes a definition module, an application interface, a translation module, and a data buffer. The definition module defines a set of storage application functions. The translation module translates each storage application function to one or more network interface driver functions. The data buffer transfers data blocks between the storage application and the network interface driver.

Claims

1. An apparatus comprising a non-transitory computer-readable storage medium for providing an independent interface to update a function of a storage application independent from the storage application, and to update a function of a network interface driver independent from the network interface driver, the apparatus comprising:

an isolation module stored on a storage device, the isolation module to isolate the storage application from the network interface driver communicatively connecting a host computing device to a network interface device, the network interface device providing a physical connection to a storage area network (SAN) switch that connects the host computing device to a storage device, the isolation module configured to;

receive a storage application function call from the storage application;

translate the storage application function call to a corresponding network interface driver function call;

invoke the corresponding network interface driver function call of the network interface driver in response to receiving the storage application function call from the storage application; and

transfer data blocks between the storage application and the network interface driver through a data buffer.

2. The apparatus of claim 1, the isolation module further comprising a driver interface configured to utilize the network interface driver functions to exchange messages with the network interface driver.

3. The apparatus of claim 1 wherein the network interface driver comprises a Storage Area Network (SAN) interface driver.

4. The apparatus of claim 2 wherein the driver interface exchanges messages with a plurality of network interface drivers.

23. The apparatus of claim 1, wherein the isolation module comprises a software isolation layer to allow continued functionality between the storage application and a plurality of existing network interface drivers after an addition of another network interface driver and before an update to the storage application.

5. A system comprising:

a processor configured to execute machine code;

an Input/Output (I/O) module configured to couple the system to a network;

a network interface driver communicatively connecting a host computing device to a network interface device, the network interface device providing a physical connection to a storage area network (SAN) switch that connects the host computing device to a storage device;

a storage application executing on the host computing device that stores data on the storage device;

an isolation module executing on the host computing device and configured to;

receive a storage application function call from the storage application;

translate the storage application function call to a corresponding network interface driver function call;

invoke the corresponding network interface driver function call of the network interface driver in response to receiving the storage application function call from the storage application; and

transfer data blocks between the storage application and the network interface driver through a data buffer.

6. The system of claim 5, wherein the isolation module further comprises a driver interface configured to utilize the network interface driver functions to exchange messages with the network interface driver.

7. The system of claim 5, wherein the network interface driver comprises a Storage Area Network (SAN) interface driver.

8. The system of claim 6, wherein the driver interface exchanges messages with a plurality of network interface drivers.

9. The system of claim 5, wherein the storage application may be replaced without impacting the network interface driver.

10. The system of claim 5, wherein the network interface driver may be replaced without impacting the storage application.

11. The system of claim 5, wherein the messages comprise SCSI commands.

12. The system of claim 5, wherein the data blocks comprise SCSI data blocks.

24. The system of claim 5, wherein the isolation module further comprises a software isolation layer to allow continued functionality between the storage application and a plurality of existing network interface drivers after an addition of another network interface driver and before an update to the storage application.

13. A non-transitory computer-readable storage medium tangibly embodying a program of computer-readable instructions executable by a digital processing apparatus to perform operations, the operations comprising:

isolating the storage application from a network interface driver communicatively connecting a host computing device to a network interface device, the network interface device providing a physical connection to a switch that connects the host computing device to a storage device, thereby providing an isolation layer;

receiving a storage application function call from the storage application to communicate a message to the network interface device;

translating the storage application function call to a corresponding network interface driver function call;

invoking the corresponding network interface driver function call of the network interface driver to communicate the message in response to receiving the storage application function call from the storage application; and

transferring data blocks between the storage application and the network interface driver through a data buffer.

14. The computer-readable storage medium of claim 13, wherein the network interface driver comprises a Storage Area Network (SAN) interface driver.

15. The computer-readable storage medium of claim 13, wherein the storage application exchanges messages with a plurality of network interface drivers through the isolation layer.

16. The computer-readable storage medium of claim 13, wherein the storage application may be replaced without impacting the network interface driver.

17. The computer-readable storage medium of claim 13, wherein the network interface driver may be replaced without impacting the storage application.

18. The computer-readable storage medium of claim 13, wherein the messages comprise SCSI commands.

19. The computer-readable storage medium of claim 13, wherein the data blocks comprise SCSI data blocks.

25. The computer-readable storage medium of claim 13, wherein the operations further comprise allowing continued functionality between the storage application and a plurality of existing network interface drivers after an addition of another network interface driver and before an update to the storage application.

20. An apparatus comprising:

a processor configured to execute machine code;

an isolation module comprising instructions for;

defining a set of storage application functions;

defining a set of network interface driver functions;

receiving a storage application function call from a storage application executing on a host computing device;

translating the storage application function call to a corresponding network interface driver function call;

invoking the corresponding network interface driver function call of a network interface driver in response to receiving the storage application function call from the storage application, wherein the network interface driver communicatively connects the host computing device to a network interface device that provides a physical connection to a switch that connects the host computing device to a storage device; and

transferring data blocks between the storage application and the network interface driver through a data buffer.

21. The apparatus of claim 20, wherein the network interface driver comprises a Storage Area Network (SAN) interface driver.

22. The apparatus of claim 20, wherein the storage application exchanges messages with a plurality of network interface drivers through the isolation module.

26. The apparatus of claim 20, wherein the apparatus further comprises a software isolation layer allowing continued functionality between the storage application and a plurality of existing network interface drivers after an addition of another network interface driver and before an update to the storage application.