Puja K Gupta

US Patent:

20090089628, Apr 2, 2009

Filed:

Oct 1, 2007

Appl. No.:

11/865352

Inventors:

Mark S. Day - Saratoga CA, US
Dominic B. Giampaolo - Mountain View CA, US
Puja D. Gupta - Sunnyvale CA, US

International Classification:

G06F 11/07

US Classification:

714 54, 714E11021

Abstract:

Methods, systems and machine readable media for file system error detection and protection are described. In one aspect, an embodiment of a method includes collecting first data identifying at least one error in performing at least one of reading or writing data to a storage device and determining, through an association between the first data and file identifiers, a set of files which are effected by the at least one error. The collecting may be performed automatically as a background process. In another aspect, an embodiment of a method includes detecting at least one error in file system metadata for a storage device, the detecting being performed automatically as a background process, and storing state information automatically in response to the detecting; the state information indicates that upon next mounting of the storage device, the data processing system will automatically cause the running of a file system check of the file system metadata.

US Patent:

20120198287, Aug 2, 2012

Filed:

Feb 8, 2012

Appl. No.:

13/369258

Inventors:

Mark S. Day - Saratoga CA, US
Dominic B. Giampaolo - Mountain View CA, US
Puja D. Gupta - Sunnyvale CA, US

International Classification:

G06F 11/07

US Classification:

714 45, 714E11025

Abstract:

In one aspect, an embodiment of file system error detection and protection includes collecting first data identifying at least one error in performing at least one of reading or writing data to a storage device and determining, through an association between the first data and file identifiers, a set of files which are effected by the at least one error. The collecting may be performed automatically as a background process. In another aspect, an embodiment includes detecting at least one error in file system metadata for a storage device, the detecting being performed automatically as a background process, and storing state information automatically in response to the detecting; the state information indicates that upon next mounting of the storage device, the data processing system will automatically cause the running of a file system check of the file system metadata.

US Patent:

20130073870, Mar 21, 2013

Filed:

Sep 15, 2011

Appl. No.:

13/233090

Inventors:

Conrad Sauerwald - Mountain View CA, US
Daniel J. Post - Campbell CA, US
Eric Brandon Tamura - Mountain View CA, US
Matthew J. Byom - San Jose CA, US
Puja Dilip Gupta - Sunnyvale CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G06F 12/14

US Classification:

713193, 713189

Abstract:

Systems and methods are disclosed for secure relocation of encrypted files for a system having non-volatile memory (“NVM”). A system can include an encryption module that is configured to use a temporary encryption seed (e.g., a randomly generated key and a corresponding initialization vector) to decrypt and encrypt data files in an NVM. These data files may have originally been encrypted with different encryption seeds. Using such an approach, data files can be securely relocated even if the system does not have access to the original encryption seeds. In addition, the temporary encryption seed allows the system to bypass a default key scheme.

US Patent:

7774320, Aug 10, 2010

Filed:

Apr 1, 2005

Appl. No.:

11/097776

Inventors:

Mark Steven Day - Saratoga CA, US
Wenguang Wang - Cupertino CA, US
Puja Dilip Gupta - Sunnyvale CA, US
Christopher Yoshito Emura - Santa Clara CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G06F 7/00
G06F 17/00

US Classification:

707690

Abstract:

Systems, methods, computer program products, and means are provided for verifying the integrity of data structures. A system includes a first data structure, a second data structure, and a fingerprint block. The first data structure has a first set of unique identifiers. The second data structure has a second set of unique identifiers. The fingerprint block verifies correspondence between the first and second data structures by performing a mathematical function on the first and second sets of unique identifiers to produce a result indicative of correspondence.

US Patent:

20180349209, Dec 6, 2018

Filed:

Dec 8, 2017

Appl. No.:

15/836459

Inventors:

- Cupertino CA, US
Pierre Habouzit - Triel sur Seine, FR
Daniel A. Chimene - San Francisco CA, US
Jeremy C. Andrus - Sunnyvale CA, US
James M. Magee - Orlando FL, US
Puja Gupta - San Francisco CA, US

International Classification:

G06F 9/52
G06F 9/48

Abstract:

Techniques are disclosed relating to efficiently handling execution of multiple threads to perform various actions. In some embodiments, an application instantiates a queue and a synchronization primitive. The queue maintains a set of work items to be operated on by a thread pool maintained by a kernel. The synchronization primitive controls access to the queue by a plurality of threads including threads of the thread pool. In such an embodiment, a first thread of the application enqueues a work item in the queue and issues a system call to the kernel to request that the kernel dispatch a thread of the thread pool to operate on the first work item. In various embodiments, the dispatched thread is executable to acquire the synchronization primitive, dequeue the work item, and operate on it.

US Patent:

20170200008, Jul 13, 2017

Filed:

Jan 10, 2016

Appl. No.:

14/991988

Inventors:

- Cupertino CA, US
Joseph R. Auricchio - San Francisco CA, US
Puja D. Gupta - Sunnyvale CA, US
Ananthakrishna Ramesh - Cupertino CA, US
Timothy P. Hannon - Mountain View CA, US

International Classification:

G06F 21/57
H04L 29/06
H04W 12/04
H04L 9/32
H04W 12/06
G06F 9/44
H04L 9/08

Abstract:

Systems and methods are disclosed for implementing an educational mode on a portable computing device, such as a tablet computer, that is a single-user system, used serially by multiple users. Each user can have a separate user storage that may be encrypted. The computing device boots as a system user to a login screen. A first student user enters user credentials into the login screen. The computing device can reboot the user-space processes, while leaving the kernel running, rebooting the computing device as the first student user. When the first student user logs out, data to be synchronized to, e.g., the cloud, can be synchronized for the first student user while a second student user is logged into the device.