A virtual file system and its implementation method

Abstract

The invention discloses a virtual file system and an implementation method thereof. The virtual file system comprises an application program access database used for storing the file access information of the application program, a system implant module used for realizing the butting joint with the file system of an operating system nucleus, a file system flow engine which refuses or permits the file operation of the application program according to the file access information of the application program stored in the application program access database, if yes, the file flow engine intercepts or forwards the file operation. According to the invention, a virtual layer is introduced between the file system and the application program, the application program passes through the virtual layer module to attempt to acquire the data in the file system, so as to perform forwarding, relocating and operation in given limitation through the file system according to the limitation of the application program.

Description

technical field [0001] The invention relates to system virtualization technology, in particular to a virtual file system and its realization method. Background technique [0002] The birth of the file system is complementary to the computer development route. In the early days, the method of directly reading the storage medium through the specific operation hardware interface was adopted, and different storage methods were adopted for different applications and different hardware. Later, a simple file system such as FAT (File Allocation Table, file allocation table) partition was introduced to realize simple file management. Later, the file system function was integrated in the operating system, and the file system management function was formed into a common structure now. However, the basic functional goal of the file system has not changed since its inception, that is, it is only an index storage of file information, which is difficult to adapt to modern business needs....

AI Technical Summary

Problems solved by technology

However, the basic functional goal of the file system has not changed since its inception, that is, it is only an index storage of file information, which is difficult to adapt to modern business needs

[0003] Linux provides the VFS (Virtual File System, virtual file system) function, which enables the operating system to access different file storage media, such as disks and tapes, under the same API (Application Programming Interface, application programming interface) interface. , Flash storage, etc., can also realize access to different disk partitions in the same medium, such as NTFS (New Technology File System, new technology file system), EXT2, Yaffs, NFS (Network File System, network file system), etc., which are more traditional The operating system has improved, but it is still unable to achieve faster business changes and business support capabilities

[0004] In the current file system, the application program can directly access the directory structure and file information through the API, but there are limitations to the content access control and security permission access control functions of the application program, and it is impossible to precisely control the resources that the application program can access

[0005] In the current embedded development, the application of open source code is more and more extensive, but the system environment erected by different open source codes is not the same, which brings troubles to transplantation and security risks

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