The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2009
Filed:
May. 23, 2005
William Todd Boyd, Poughkeepsie, NY (US);
John Lewis Hufferd, San Jose, CA (US);
Agustin Mena, Iii, Austin, TX (US);
Renato John Recio, Austin, TX (US);
Madeline Vega, Austin, TX (US);
William Todd Boyd, Poughkeepsie, NY (US);
John Lewis Hufferd, San Jose, CA (US);
Agustin Mena, III, Austin, TX (US);
Renato John Recio, Austin, TX (US);
Madeline Vega, Austin, TX (US);
International Bsuiness Machines Corporation, Armonk, NY (US);
Abstract
The present invention provides a method that enables application instances to pass block mode storage requests directly to a physical I/O adapter without run-time involvement from the local operating system or hypervisor. Specifically, a mechanism for providing and using a linear block address (LBA) translation protection table (TPT) to control out of user space I/O operations is provided. In one aspect of the present invention, the LBATPT includes an adapter protection table that has entries for each portion of a storage device. Entries include access control values which identify whether the entry is valid and what access type operations may be performed on a corresponding portion of a storage device. I/O requests may be checked against these access control values to determine if an application instance that submitted the I/O requests may access the LBAs identified in the I/O requests in the manner requested.