Systems, apparatus, and methods for identifying stored data that may be accessed by a host entity and providing data management services

• US 9,077,752 B2
• Filed: 12/21/2012
• Issued: 07/07/2015
• Est. Priority Date: 12/23/2011
• Status: Active Grant

• Current Assignee: Cirrus Data Solutions, Inc.
• Original Assignee: Cirrus Data Solutions, Inc.
• Inventors: Lam, Wai T., Lam, Wayne, Liu, Chang
• Primary Examiner(s): BAROT, BHARAT
• Application Number:
  US13/725,326
• Publication Number:
  US 20130166747A1
• Time in Patent Office: 928 Days
• Field of Search: 709202-203, 709223-226, 370360-363, 370400-401, 714 42- 43
• US Class Current: 1/1
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0635 by changing the path, e.g. traffic rerouting, path reconfiguration
• CPC Class Codes: G06F 3/0653 Monitoring storage devices or systems
• CPC Class Codes: G06F 3/0673 Single storage device
• CPC Class Codes: H04L 63/101 Access control lists [ACL]
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services

Abstract

A first device in a network, having a first port, receives an identifier of a second port of a second device in the network, the network comprising a host entity, a switch, and a storage system. The first port of the first device spoofs the second port of the second device, during a communication with the switch. The first device receives information identifying a third port of a third device in the network that is zoned to the second port of the second device. The device identifies data stored in the storage system that may be accessed by the host entity, based at least on the information.

Claims

1. A method of determining information relating to data stored in a network, the method comprising:

receiving from a storage system a first identifier associated with a first port of the storage system, by a device located in a path between the storage system and a switch in a network;

using the first identifier to spoof the first port of the storage system during a first communication with the switch;

receiving, from a host server connected to the switch, a request to register a second port of the host server, the request including a second identifier associated with the second port;

using the second identifier to spoof the second port of the host server during a second communication with the storage system; and

receiving from the storage system information identifying data which is stored in the storage system and to which the second port of the host server has access.

2. The method of claim 1, wherein the switch is a Fibre channel switch.

3. The method of claim 1, wherein the first identifier comprises a world wide port name of the first port of the storage system.

4. The method of claim 3, wherein using the first identifier to spoof the first port of the storage system during a first communication with the switch further comprises:

adding the first identifier to a third port of the device; and

transmitting, by the device, to the switch, via the third port, a request comprising the first identifier.

5. The method of claim 1, wherein using the second identifier to spoof the second port of the host server during a second communication with the storage system further comprises:

adding the second identifier to a fourth port of the device; and

transmitting to the storage system a request for information identifying data which is stored in the storage system and to which the second port of the host server has access.

6. A method of determining information related to data stored in a network, the method comprising:

identifying, by a device located in a path between a switch port of a switch and an initiator port of a host entity, an initiator world wide port name of the initiator port, in a registration procedure;

adding the initiator world wide port name to a first device port of the device;

transmitting, to the switch, a request for information identifying a port that is associated with the initiator world wide port name;

receiving, from the switch, a target world wide port name of a target port of a storage system that is associated with the initiator port; and

identifying a storage volume in the storage system that is associated with the initiator port, based on the target world wide port name and the initiator world wide port name.

7. The method of claim 6, wherein the registration procedure comprises registration by the initiator port with the device.

8. The method of claim 7, wherein the registration procedure comprises a Fibre channel log-in procedure.

9. The method of claim 6, further comprising:

adding the target world wide port name to a second device port of the device.

10. The method of claim 6, further comprising:

assigning the initiator world wide port name to the first device port.

11. The method of claim 6, further comprising:

receiving, from the switch, a target world wide port name of a target port of the storage system that is zoned to the initiator port.

12. The method of claim 11, further comprising:

accessing a Simple Name Server table that identifies, for each of one or more ports of the switch, a corresponding world wide port name.

13. The method of claim 6, further comprising:

transmitting to the storage system a REPORT LUN command including the initiator world wide port name; and

receiving from the storage system, in response to the REPORT LUN command, information identifying the storage volume to which the initiator world wide port name has access.

14. The method of claim 13, further comprising:

transmitting to the storage system a SCSI inquiry relating to the storage volume to which the initiator world wide port name has access;

receiving, in response to the SCSI inquiry, information indicating a global unique identifier of the storage volume; and

determining whether two storage volumes associated with the initiator world wide port name are identical based on the global unique identifier.

15. The method of claim 6, wherein the switch is a Fibre channel switch.

16. The method of claim 6, further comprising:

providing a service with respect to the identified storage volume.

17. A method of obtaining information relating to data stored in a network, the method comprising:

receiving, by a first device in a network, the first device having a first port, an identifier of a second port of a second device in the network, the network comprising a host entity, a switch, and a storage system;

spoofing, by the first port of the first device, the second port of the second device during a communication with the switch;

receiving, by the first device, information identifying a third port of a third device in the network that is zoned to the second port of the second device;

identifying, based at least on the information, data which is stored in the storage system and to which the host entity has access.

18. The method of claim 17, further comprising:

adding the identifier to the first port of the first device.

19. The method of claim 18, wherein spoofing, by the first port of the first device, the second port of the second device during a communication with the switch further comprises:

transmitting, by the first port of the device, to the switch, a request including the identifier.

20. The method of claim 17, wherein the second device comprises the storage system and the third device comprises the host entity.

21. The method of claim 20, further comprising:

registering the first port with the switch;

receiving, from the host entity, a request to register the third port, the request including a world wide port name of the third port;

adding the world wide port name of the third port to a fourth port of the first device; and

spoofing the third port of the host entity during a second communication with the storage system to identify the data which is stored in the storage system and to which the host entity has access.

22. The method of claim 17, wherein the second device comprises the host entity and the third device comprises the storage system.

23. The method of claim 22, further comprising:

receiving, by the first device, from the host entity, a request to register the second port, the request including a world wide port name of the second port.

24. The method of claim 23, further comprising:

adding the world wide port name of the second port to a fifth port of the first device;

transmitting, by the first device, to the switch, a request for information identifying one or more devices that are zoned to the second port, the request including the world wide port name of the second port.

25. The method of claim 17, wherein the first device is located in a path between the switch and a second switch.

26. A device located in a path between a switch port of a switch and an initiator port of a host entity, the device comprising:

a first device port;

a memory storing computer program instructions; and

a processor configured to execute the computer program instructions which, when executed on the processor, cause the processor to perform operations comprising;

identifying an initiator world wide port name of the initiator port, in a registration procedure;

adding the initiator world wide port name to the first device port;

transmitting, to the switch, a request for information identifying a port that is associated with the initiator world wide port name;

receiving, from the switch, a target world wide port name of a target port of a storage system that is associated with the initiator port; and

identifying a storage volume in the storage system that is associated with the initiator port, based on the target world wide port name and the initiator world wide port name.

27. The device of claim 26, wherein the registration procedure comprises registration by the initiator port with the device.

28. The device of claim 27, wherein the switch is a Fibre channel switch.

29. The device of claim 28, wherein the registration procedure comprises a Fibre channel log-in procedure.

30. The device of claim 26, the operations further comprising:

adding the target world wide port name to a second device port of the device.

31. The device of claim 26, the operations further comprising:

receiving, from the switch, a target world wide port name of a target port of the storage system that is zoned to the initiator port.

32. The device of claim 31, the operations further comprising:

accessing a Simple Name Server table that identifies, for each of one or more ports of the switch, a corresponding world wide port name.

33. The device of claim 26, the operations further comprising:

transmitting to the storage system a REPORT LUN command including the initiator world wide port name; and

receiving from the storage system, in response to the REPORT LUN command, information identifying the storage volume to which the initiator world wide port name has access.

34. A device located in a network, the network comprising a host entity, a switch, and a storage system, the device comprising:

a first port;

a memory storing computer program instructions; and

a processor configured to execute the computer program instructions which, when executed on the processor, cause the processor to perform operations comprising;

receiving an identifier of a second port of a second device in the network;

spoofing, by the first port, the second port of the second device during a communication with the switch;

receiving information identifying a third port of a third device in the network that is zoned to the second port of the second device; and

identifying, based at least on the information, data which is stored in the storage system and to which the host entity has access.

35. The device of claim 34, the operations further comprising:

adding the identifier to the first port.

36. The device of claim 35, wherein spoofing, by the first port, the second port of the second device during a communication with the switch further comprises:

transmitting, by the first port, to the switch, a request including the identifier.

37. The device of claim 34, wherein the second device comprises the storage system and the third device comprises the host entity.

38. The device of claim 37, the operations further comprising:

registering the first port with the switch;

receiving, from the host entity, a request to register the third port, the request including a world wide port name of the third port;

adding the world wide port name of the third port to a fourth port of the device; and

spoofing the third port of the host entity during a second communication with the storage system to identify the data which is stored in the storage system and to which the host entity has access.

39. The device of claim 34, wherein the second device comprises the host entity and the third device comprises the storage system.

40. The device of claim 39, the operations further comprising:

receiving, from the host entity, a request to register the second port, the request including a world wide port name of the second port.

41. The device of claim 40, the operations further comprising:

adding the world wide port name of the second port to a fifth port of the first device;

transmitting, to the switch, a request for information identifying one or more devices that are zoned to the second port, the request including the world wide port name of the second port.

42. The device of claim 34, wherein the device is located in a path between the switch and a second switch.