Method and system for modifying firmware image settings within data storage device controllers

• US 8,332,839 B2
• Filed: 08/15/2008
• Issued: 12/11/2012
• Est. Priority Date: 08/15/2008
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: LSI Corporation (Broadcom, Inc.)
• Inventors: Daftardar, Jayant Mohan
• Primary Examiner(s): Wong, Don
• Assistant Examiner(s): KABIR, MOHAMMAD H
• Application Number:
  US12/192,444
• Publication Number:
  US 20100042984A1
• Time in Patent Office: 1,579 Days
• Field of Search: 717/168
• US Class Current: 717/173
• CPC Class Codes: G06F 8/65 Updates security arrangements therefor G06F21/57

Abstract

Embodiments of the invention include a method for modifying firmware settings within a data storage controller, such as a data storage controller used in a Redundant Array of Inexpensive Disks (RAID) storage array. The method includes extracting a sub-module from a firmware image stored in the controller, stripping off the sub-module'"'"'s header, decompressing the remaining compressed image by replacing the stripped sub-module header and an extended image header in the compressed image with an extended header image that allows conventional decompression, and separating the decompressed image into its executable code and at least one settings group. The method reinitializes the executable code to restore its validity, modifies one or more values of one or more settings groups, creates a new sub-module using the reinitialized executable code and the modified settings groups, and replaces the original settings groups in the firmware image with the modified settings groups, thereby modifying the firmware settings of the data storage controller.

Claims

1. A method for modifying firmware settings within a data storage controller, wherein the data storage controller has stored therein at least one firmware image that includes a plurality of sub-modules, and wherein each sub-module includes a sub-module header and a compressed image, the method comprising the steps of:

extracting at least one of the sub-modules from the firmware image;

stripping the sub-module header from the extracted sub-module;

decompressing the compressed image of the extracted sub-module, using a decompression-enabling extended image header, to generate a decompressed image, wherein the decompressed image includes executable code including a code header and at least one settings group having at least one settings group value therein;

separating the executable code and the at least one settings group;

reinitializing the executable code in such a way that the executable code becomes a valid image;

modifying at least one value of at least one settings group to form a modified version of the original settings group;

creating a modified sub-module using the reinitialized executable code and the modified version of the original settings group by concatenating the modified version of the original settings group to the reinitialized executable code to form a new decompressed image and compressing the new decompressed image to form the modified sub-module; and

inserting the modified version of the original settings group into the firmware image in such a way that the original settings group extracted from the firmware image is replaced by the modified version of the original settings group to form a modified firmware image, wherein the modified firmware image represents a modification of the firmware settings within the data storage controller.

2. The method as recited in claim 1, wherein the sub-module includes an extended image header, and wherein the decompressing step includes replacing the extended image header from the compressed image with the decompression-enabling extended image header.

3. The method as recited in claim 1, wherein the modified sub-module creating step includes appending the modified version of the original settings group to the reinitialized executable code and adding a header to form a modified decompressed image, and compressing the modified decompressed image to form the modified sub-module.

4. The method as recited in claim 1, further comprising the step of comparing the modified version of the settings group to the original settings group.

5. The method as recited in claim 4, wherein the comparing step includes at least one of comparing the size of the modified version of the settings group to the size of the original settings group, comparing the image type of the modified version of the settings group to the image type of the original settings group, and validating a computed checksum of the modified version of the settings group and the checksum of the original settings group.

6. The method as recited in claim 1, further comprising the step of verifying the decompressed image, wherein the verifying step includes at least one of reading a header signature in the code header, comparing the size of the at least one settings groups with a total size value of the at least one settings groups, and comparing the type of the at least one settings groups with image type information in the code header.

7. The method as recited in claim 1, further comprising, before the extracting step, the step of validating the firmware image, wherein the validating step includes at least one of comparing a sub-module name with a target sub-module name embedded in the sub-module header, and comparing a computed checksum of the firmware image with a checksum value stored in the firmware image.

8. The method as recited in claim 1, wherein extracting step includes extracting the sub-modules by sub-module type.

9. The method as recited in claim 1, wherein at least one of the sub-modules is an interface chip sub-module, and the compressed image within the interface chip sub-module includes interface chip code.

10. A data storage controller device, comprising:

an interface configured to couple the data storage controller device to at least one data storage device; and

a controller coupled to the interface and configured to read data from and write data to the at least one data storage device, wherein the controller has stored therein at least one firmware image that includes a plurality of sub-modules, wherein each sub-module includes a sub-module header and a compressed image, and wherein the compressed image includes an extended image header therein,

wherein the controller is configured to

extract at least one of the sub-modules from the firmware image,

strip the sub-module header from the extracted sub-module,

decompress the compressed image of the extracted sub-module, using a decompression-enabling extended image header, to generate a decompressed image, wherein the decompressed image includes executable code including a code header and at least one settings group having at least one settings group value therein,

separate the executable code and the at least one settings group,

reinitialize the executable code in such a way that the executable code becomes a valid image,

modify at least one value of at least one settings group to form a modified version of the original settings group,

create a modified sub-module using the reinitialized executable code and the modified version of the original settings group by concatenating the modified version of the original settings group to the reinitialized executable code to form a new decompressed image and compressing the new decompressed image to form the modified sub-module, and

insert the modified version of the original settings group into the firmware image in such a way that the original settings group extracted from the firmware image is replaced by the modified version of the original settings group to form a modified firmware image,

wherein the modified firmware image represents a modification of the firmware settings within the data storage controller.

11. The device as recited in claim 10, wherein the sub-module includes an extended image header, and wherein the controller is configured to decompress the compressed image of the extracted sub-module by replacing the extended image header from the compressed image with the decompression-enabling extended image header.

12. The device as recited in claim 10, wherein the controller is configured to create the modified sub-module by appending the modified version of the original settings group to the reinitialized executable code and adding a header to form a modified decompressed image, and compressing the modified decompressed image to form the modified sub-module.

13. The device as recited in claim 10, wherein the controller is further configured to compare the modified version of the settings group to the original settings group.

14. The device as recited in claim 13, wherein the controller is configured to compare the modified version of the settings group to the original settings group by comparing the size of the modified version of the settings group to the size of the original settings group, comparing the image type of the modified version of the settings group to the image type of the original settings group, and validating a computed checksum of the modified version of the settings group and the checksum of the original settings group.

15. The device as recited in claim 10, wherein the controller is further configured to verify the decompressed image by reading a header signature in the code header, comparing the size of the at least one settings groups with a total size value of the at least one settings groups, and comparing the type of the at least one settings groups with image type information in the code header.

16. The device as recited in claim 10, wherein the controller is further configured to validate the firmware image.

17. The device as recited in claim 16, wherein the controller is further configured to validate the firmware image by comparing a sub-module name with a target sub-module name embedded in the sub-module header, and comparing a computed checksum of the firmware image with a checksum value stored in the firmware image.

18. The device as recited in claim 10, wherein the controller is configured to extract at least one of the sub-modules from the firmware image by sub-module type.

19. A computer readable medium storing instructions that carry out a method for modifying firmware settings within a data storage controller, wherein the data storage controller has stored therein at least one firmware image that includes a plurality of sub-modules, wherein each sub-module includes a sub-module header and a compressed image, and wherein the compressed image includes an extended image header therein, the computer readable medium comprising:

instructions for extracting at least one of the sub-modules from the firmware image;

instructions for stripping the sub-module header from the extracted sub-module;

instructions for decompressing the compressed image of the extracted sub-module, using a decompression-enabling extended image header, to generate a decompressed image, wherein the decompressed image includes executable code including a code header and at least one settings group having at least one settings group value therein;

instructions for separating the executable code and the at least one settings group;

instructions for reinitializing the executable code in such a way that the executable code becomes a valid image;

instructions for modifying at least one value of at least one settings group to form a modified version of the original settings group;

instructions for creating a modified sub-module using the reinitialized executable code and the modified version of the original settings group by concatenating the modified version of the original settings group to the reinitialized executable code to form a new decompressed image and compressing the new decompressed image to form the modified sub-module; and

instructions for inserting the modified version of the original settings group into the firmware image in such a way that the original settings group extracted from the firmware image is replaced by the modified version of the original settings group to form a modified firmware image, wherein the modified firmware image represents a modification of the firmware settings within the data storage controller.

20. The computer readable medium as recited in claim 19, wherein the sub-module includes an extended image header, and wherein the instructions for decompressing the compressed image of the extracted sub-module includes instructions for replacing the extended image header from the compressed image with the decompression-enabling extended image header.