A method and system for improving IO performance based on kernel file filter driver

Abstract

The present invention provides a method and system for improving IO performance based on kernel file filter drive, which relates to the technical field of data processing, detects upper-layer module read request information; applies for and configures temporary cache; executes bottom-layer read function, and reads from upper-layer data cache ; Copy the encrypted data from the upper data cache to the temporary cache; decrypt the encrypted data in the temporary cache to form plaintext data; copy the plaintext data from the temporary cache to the upper data cache; release the temporary cache. The method and system for improving IO performance based on the kernel file filter driver are copied from the application layer to the kernel layer for processing, and then copied back to the application layer after processing, thereby improving processing efficiency and reducing performance overhead.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a method and system for improving IO performance based on a kernel file filter driver. Background technique [0002] In the security industry, special protection files need to be transparently encrypted and decrypted. In order to improve IO performance, that is, to provide cache and disk array to improve storage IO performance, most of them use kernel state file filter driver technology. [0003] Since the kernel filter driver does not have its own cache, when the upper layer requests plaintext data from the kernel filter driver, it must first request ciphertext data from the lower file system, then perform data filtering, and finally return the requested plaintext data; When writing plaintext data, data filtering must be performed first, and then the ciphertext is written to the underlying file system. Under the condition of no-cache implementation and fixed filter dri...

AI Technical Summary

Problems solved by technology

[0004] In the Linux kernel, in the implementation of the file IO interface in the file system, the definition of cache parameters is the application layer. Directly passing the dynamically applied cache address as the cache parameter of the IO interface will fail and report an error. At this time, the current process needs to be switched memory space, resulting in high performance overhead of the system, resulting in unstable operation of the system, and also occupying a large amount of system resources

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