EXT file system offline modification method and device and storage medium

Abstract

The invention discloses an EXT file system offline modification method and device, and the method comprises the steps: extracting a mirror image file of physical storage equipment, and obtaining an EXT partition needing to be accessed in the mirror image file; initializing the EXT partition, and reading a super block, a group descriptor, a block bitmap, a node bitmap and a node table in the EXT partition; traversing the EXT partition according to the file name path or the node number path of the target file to obtain a mirror image position where the target file is located; and modifying the file name, the file content or the file attribute at the mirror image position. According to the scheme, initialization conditions of a file system are optimized, a certain file can be accessed independently, the file access speed is greatly increased, meanwhile, traversal of a file name path and a node number path is supported, the position of the file is conveniently and effectively positioned, and a file structure is conveniently and effectively obtained. The modification granularity can be accurately controlled, so that the offline modification mode is simple and accurate.

Description

technical field [0001] The invention relates to the field of file system modification, in particular to an off-line modification method, device and storage medium of an EXT file system. Background technique [0002] The EXT file system is the default file system of many Linux operating system distributions. EXT uses multiple locations in the entire file system to store backups of important data structures, making it highly recoverable. There are two ways in the existing EXT file system access technology, one is direct online access to the physical storage device, and the other is offline access through the physical storage device image. The offline access method is mainly to directly analyze the file system of the image. After analyzing the file system of the image, the directory structure and files of the physical storage device can be obtained for the next step of file analysis. [0003] At present, through offline access to the image of the physical storage device, only ...

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Problems solved by technology

[0005] As mentioned above, it is difficult to modify the Ext file system through offline modification and the control is difficult. The purpose of the embodiments of this application is to propose a method, device and storage medium to solve the technical problems mentioned in the background technology section above.

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