Patent ID: 9495210
Filing Date: 2016-11-15
CPC Classification: G06F

Claim Text:
1. A method for providing a logical device model comprising: providing a plurality of logical devices, at least one of said plurality of logical devices being a kernel mode logical device provided by a first provider executing in kernel space and at least one of said plurality of logical devices being a user mode logical device provided by a second provider executing in user space; and establishing a relationship between the first provider and the second provider wherein the first provider is a consumer of a logical device provided by the second provider, said logical device model including said relationship, wherein the first provider, as a consumer of the logical device provided by the second provider, sends requests, which are directed to the logical device provided by the second provider, to code of an application programming interface that transfers runtime control to the second provider to execute code of the second provider in connection with processing the requests, wherein the logical device model comprises a logical device runtime stack representing a runtime call chain including the kernel mode logical device, the user mode logical device and a second user mode logical device provided by a third provider executing in user space, wherein the runtime call chain includes a plurality of runtime calls each transferring runtime control from code of a logical device consumer to code of a logical device provider, whereby the kernel mode logical device is a consumer of the user mode logical device and the user mode logical device is further a consumer of the second user mode logical device, wherein the second provider, that provides the user mode logical device as a consumer of the second user mode logical device provided by the third provider, sends other requests, which are directed to the second user mode logical device provided by the third provider, to code of the application programming interface that transfers runtime control to the third provider to execute code of the third provider in connection with processing the other requests.