Managed file system filter model and architecture

Details Managed file system filter model and architecture Managed file system filter model and architecture

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G06F 13/00 (2006.01) G06F 7/00 (2006.01) G06F 9/44 (2006.01) G06F 9/46 (2006.01) G06F 12/00 (2006.01) G06F 12/08 (2006.01) G06F 13/14 (2006.01) G06F 15/17 (2006.01) G06F 17/30 (2006.01)

Patent

CA 2450044

A model in which filter drivers are managed to receive callbacks for I/O requests in which the filter drivers have registered an interest. Per-volume instances of filter drivers register with a filter manager for pre-callbacks (for I/O to the file system) and post-callbacks (for I/O from the file system), and identify which I/O requests (e. g., create, read, write) they are registering to receive callbacks. The filter manager orders the instances for callbacks. When an I/O request is received, the filter manager converts the I/O request to callback data and calls the interested filters in the callback order, whereby the filter instances can process the I/O data. As the request returns from the file system, filters desiring post callbacks are called in the reverse order. Efficient context management for the filters and other functions, such as non-reentrant file I/O, are also provided by the model.

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