Method and apparatus for providing a server function in a logically partitioned hardware machine

• US 5,564,040 A
• Filed: 11/08/1994
• Issued: 10/08/1996
• Est. Priority Date: 11/08/1994
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Kubala, Jeffrey P.
• Primary Examiner(s): Kim, Matthew M.
• Application Number:
  US08/335,609
• Time in Patent Office: 700 Days
• Field of Search: 364/200 MS File, 364/900 MS File, 395/479, 395/480, 395/497.01, 395/490, 395/497.04, 395/491, 395/186, 395/188.01, 395/726
• US Class Current: 711/173
• CPC Class Codes: G06F 9/4406 Loading of operating system

Abstract

A server function is provided in a hardware machine which is divided into a plurality of logical partitions, each of which functions as a virtual hardware machine. The hardware machine has a non-user-accessible storage device for storing machine control code and other non-user-accessible code and, optionally, a user-accessible storage device for storing applications and other user-accessible code. Defined partition types include server mode partitions that are inaccessible to a user and non-server mode partitions that are accessible to a user. The hardware machine is divided into one or more logical partitions including at least one server mode partitions and, optionally, one or more non-server mode partitions. Server code for providing the server function is stored on the non-user-accessible storage device and is loaded into the server mode partition from the non-user-accessible storage device in response to an activation signal to enable the server mode partition. Each partition has a stored mode indicator identifying it as either a server mode partition or a non-server mode partition. Loading of server code into a target partition is inhibited if the stored mode indicator indicates that the target partition is a non-server mode partition. Conversely, user attempts to access a target partition are inhibited if the stored mode indicator indicates that the target partition is a server partition.

Claims

1. In a computer system in which a hardware machine comprises one or more logical partitions, each of which functions as a virtual machine, said hardware machine having a non-user-accessible storage device for storing non-user-accessible code, a method of providing a server function in said hardware machine including the steps of:

defining a plurality of partition types including server mode partitions that are inaccessible to any user of said hardware machine and non-server mode partitions that are accessible to a user, one of said partition types being associated with each of said one or more logical partitions;

defining a server mode partition within said hardware machine;

storing non-user-accessible server code for providing said server function on said non-user-accessible storage device; and

loading said server code into said server mode partition from said non-user-accessible storage device to activate said server mode partition.

2. The method of claim 1, further comprising the step of inhibiting loading of said server code from said non-user-accessible storage device into a non-server mode partition.

3. The method of claim 2 in which each of said one or more logical partitions has a stored mode indicator identifying the partition type associated with the partition, said inhibiting step comprising the steps of:

examining the stored mode indicator of a target partition selected from said one or more logical partitions for loading said server code; and

inhibiting loading of said server code into said target partition from said non-user-accessible storage device if said stored mode indicator indicates that said target partition is a non-server mode partition.

4. The method of claim 1, including the step of inhibiting user attempts to access said server code loaded into said server mode partition.

5. The method of claim 4 in which each of said one or more logical partitions has a stored mode indicator identifying the partition type associated with the partition, said inhibiting step comprising the steps of:

examining the stored mode indicator of a target partition selected from said one or more logical partitions for user access; and

inhibiting said user access if said stored mode indicator indicates that said target partition is a server mode partition.

6. The method of claim 1 in which said hardware machine is divided into a plurality of logical partitions including a server mode partition and a non-server mode partition.

7. The method of claim 1 in which each of said one or more logical partitions has a stored mode indicator identifying the partition type associated with the partition and in which each of said partition modes has a predefined set of permitted operations, said method further comprising the steps of:

examining the stored mode indicator of a target partition selected from said one or more logical partitions for a user operation to determine the mode of said target partition; and

performing said operation if it is a permitted operation for the partition type associated with said target partition, otherwise, inhibiting said operation.

8. The method of claim 1, further comprising the step of logging out said server mode partition in response to a predetermined user command.

9. The method of claim 1, further comprising the step of logging out said server mode partition in response to detection of a failure in said server mode partition.

10. The method of claim 1, further comprising the step of restarting said server mode partition in response to a predetermined user command.

11. The method of claim 1, further comprising the step of restarting said server mode partition in response to detection of a failure in said server mode partition.

12. The method of claim 1, further comprising the step of applying a trap to said server mode partition.

13. The method of claim 1, further comprising the step of removing a trap from said server mode partition.

14. The method of claim 1 in which said hardware machine also has a user-accessible storage device for storing user-accessible code.

15. The method of claim 1 in which a plurality of server mode partitions are defined within said hardware machine.

16. In a computer system in which a hardware machine comprises one or more logical partitions, each of which functions as a virtual machine, said hardware machine having a non-user-accessible storage device for storing non-user-accessible code, apparatus for providing a server function in said hardware machine, said apparatus comprising:

means for defining a plurality of partition types including server mode partitions that are inaccessible to any user of said hardware machine and non-server mode partitions that are accessible to a user, one of said partition types being associated with each of said one or more logical partitions;

means for defining a server mode partition within said hardware machine;

means for storing non-user-accessible server code for providing said server function on said non-user-accessible storage device; and

means for loading said server code into said server mode partition from said non-user-accessible storage device to activate said server mode partition.

17. The apparatus of claim 16, further comprising means for inhibiting loading of said server code from said non-user-accessible storage device into a non-server mode partition.

18. The apparatus of claim 17 in which each of said logical partitions has a stored mode indicator identifying the partition type associated with the partition, said inhibiting means comprising:

means for examining the stored mode indicator of a target partition selected from said one or more logical partitions for loading said server code; and

means responsive to a stored mode indicator indicating that said target partition is a non-server mode partition for inhibiting loading of said server code into said target partition from said non-user-accessible storage device.

19. The apparatus of claim 16, including means for inhibiting user attempts to access said server code loaded into said server partition.

20. The apparatus of claim 19 in which each of said one or more logical partitions has a stored mode indicator identifying the partition type associated with the partition, said inhibiting means comprising:

means for examining the stored mode indicator of a target partition selected from said one or more logical partitions for user access; and

means responsive to a stored mode indicator indicating that said target partition is a server mode partition for inhibiting user access to said target partition.

21. The apparatus of claim 16 in which said hardware machine is divided into a plurality of logical partitions including a server mode partition and a non-server mode partition.

22. The apparatus of claim 16 in which each of said one or more logical partitions has a stored mode indicator identifying the partition type associated with the partition and in which each of said partition modes has a predefined set of permitted operations, said apparatus further comprising:

means for examining the stored mode indicator of a target partition selected from said one or more logical partitions for a user operation to determine the mode of said target partition; and

means for performing said operation if it is a permitted operation for the partition type associated with said target partition and for otherwise inhibiting said operation.

23. The apparatus of claim 16 in which said hardware machine also has a user-accessible storage device for storing user-accessible code.

24. The apparatus of claim 16 in which a plurality of server mode partitions are defined within said hardware machine.