Host device and method for accessing a virtual file in a storage device by bypassing a cache in the host device

• US 8,601,088 B2
• Filed: 03/30/2012
• Issued: 12/03/2013
• Est. Priority Date: 05/20/2010
• Status: Active Grant

• Current Assignee: Western Digital Israel Limited (Western Digital Corporation)
• Original Assignee: SanDisk IL Ltd. (Western Digital Corporation)
• Inventors: Ittah, Eyal, Hahn, Judah Gamliel, Drori, Yehuda, Meza, Joseph, Yoon, In-Soo, Cooper, Ofir
• Primary Examiner(s): JEAN GILLES, JUDE
• Application Number:
  US13/436,373
• Publication Number:
  US 20120204238A1
• Time in Patent Office: 613 Days
• Field of Search: 709/213, 709/219, 709/203, 709/220, 709/206
• US Class Current: 709/213
• CPC Class Codes: G06F 21/79 in semiconductor storage media, e.g. directly-addressable memories

Abstract

A host device is provided comprising an interface configured to communicate with a storage device having a public memory area and a private memory area, wherein the public memory area stores a virtual file that is associated with content stored in the private memory area. The host device also comprises a cache, a host application, and a server. The server is configured to receive a request for the virtual file from the host application, send a request to the storage device for the virtual file, receive the content associated with the virtual file from the private memory area of the storage device, wherein the content is received by bypassing the cache, generate a response to the request from the host application, the response including the content, and send the response to the host application.

Claims

1. A host device comprising:

an interface configured to communicate with a storage device;

a host application having a playback engine; and

a hypertext transfer protocol (HTTP) server in communication with the host application and the interface, wherein the server is configured to;

receive a request for data from the host application, the request including a universal resource identifier (URI) that is not directly accessible by the host application,

translate the URI received from the host application into a translated location,

send a request to the storage device for the data, the request including the translated location,

receive the data from the storage device,

generate a response to the request from the host application, the response including the data, and

send the response to the host application'"'"'s playback engine.

2. The host device of claim 1, wherein the data is stored in a private memory area of the storage device.

3. The host device of claim 1, wherein the server is further configured to randomize a port through which the server listens for requests.

4. The host device of claim 1, wherein the server is further configured to verify a process or user identifier of a process sending the request.

5. The host device of claim 1, wherein the server is further configured to respond to the request only if a buffer associated with the server is not full.

6. The host device of claim 1, wherein the host application is configured to randomize the universal resource identifier (URI) of the data.

7. The host device of claim 1, wherein the server is further configured to:

determine if the request from the host application is associated with a normal user permission or a super user permission; and

send the response to the host application only if it is determined that the request is associated with the normal user permission.

8. A method for using server in a host device to communicate with a storage device, the method comprising:

performing the following in a hypertext transfer protocol (HTTP) server in host device, wherein the host device is in communication with a storage device;

receiving a request for data from a host application having a playback engine in the host device, the request including a universal resource identifier (URI) that is not directly accessible by the host application,

translating the URI received from the host application into a translated location, sending a request to the storage device for the data, the request including the translated location,

receiving the data from the storage device,

generating a response to the request from the host application, the response including the data, and

sending the response to the host application'"'"'s playback engine.

9. The method of claim 8, wherein the data is stored in a private memory area of the storage device.

10. The method of claim 8 further comprising randomizing a port through which the server listens for requests.

11. The method of claim 8 further comprising verifying a process or user identifier of a process sending the request.

12. The method of claim 8 further comprising responding to the request only if a buffer associated with the server is not full.

13. The method of claim 8, wherein the host application is configured to randomize the universal resource identifier (URI) of the data.

14. The method of claim 8 further comprising:

determining if the request from the host application is associated with a normal user permission or a super user permission; and

sending the response to the host application only if it is determined that the request is associated with the normal user permission.