Transparent encryption and decryption method and system based on multi-thread environment and storage medium

Abstract

The invention provides a transparent encryption and decryption method based on a multi-thread environment, computer equipment and a storage medium, and the method comprises the steps of obtaining a file descriptor FD, and receiving an operation request of a first thread for a file; using an atomic operation function to operate the global VFDSet, searching a virtual file descriptor VFD corresponding to the file descriptor FD in the global VFDSet through the file descriptor FD, judging the current state of the file descriptor FD if the virtual file descriptor VFD is not searched, directly returning error information by the virtual file system if the current state is marked as a closed state, and ending the process; if the current state is marked as the initialized state, calling an I / O function of an operating system to directly perform plaintext operation on the file; and if the virtual file descriptor VFD is found, realizing transparent encryption and decryption operation on the file in the virtual file system layer based on the virtual file descriptor VFD. According to the invention, the problem of mutual exclusion among multiple threads can be solved, and file data errors are avoided.

Description

technical field [0001] The invention relates to the technical field of data protection, in particular to a transparent encryption and decryption method, system and storage medium based on a multi-thread environment. Background technique [0002] In the actual operation of the transparent encryption and decryption system, there is a problem of multi-thread concurrency. When multiple threads operate a file at the same time, mutual exclusion is required for accessing and destroying data shared by threads in the virtual file layer. The global VFDSet and the virtual file descriptor VFD are shared by threads at the virtual file layer. The virtual file descriptor VFD is consistent with the real file descriptor. The global VFDSet is a collection of virtual file descriptors VFD. The global VFDSet and virtual file descriptor VFD data are required to be opened and closed as well as read and write operations on files. In order to avoid data errors, mutual exclusion locks need to be add...

AI Technical Summary

Problems solved by technology

In a multi-threaded environment, when the application layer has frequent file operations, due to the influence of the mutual exclusion lock, the program operation efficiency will drop, and there is a high probability that the process of the application layer will not respond, freeze, black screen and other problems, seriously affecting the user experience

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