Permission setting method and device for file system

Abstract

The embodiment of the invention provides a permission setting method and device for a file system. Through the permission setting method and device, permission records of access permissions of nodes of a directory tree are quickly set, and one time of permission setting operation of any node of the directory tree is expressed with updated global version parameters. According to the method, the permission record of a child node of the node with a permission to be set inherits the permission record of the node with the permission to be set after current permission setting operation, therefore, only the permission record of a parent node of the directory tree is set, and all files and all subdirectories under a directory corresponding to the parent node inherit the permission record of the parent node. It is not needed to traverse all the subdirectories or files under the parent node to set the permission record of each subdirectory or file under the parent node, so that the setting efficiency of the access permissions of the directory tree is improved. The permission record of the parent node is set, and it is not needed to set the permission record repeatedly for the subdirectories and the files under the directory corresponding to the parent node, so that storage space overhead is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of file systems, and in particular, to a method and device for setting permissions of a file system. Background technique [0002] A file system is a structured form of data storage and organization. A file system can only be used after it is mounted. The organizational structure of the file system is a directory tree with a tree structure. The directory tree includes the root directory, subdirectories and files under the subdirectories. The subdirectories can not only contain files, but also Contains the next level of subdirectories, and so on constitutes a directory tree with a multi-level directory structure. The root of the tree structure is a mount point. In the directory tree, the root directory is located at the root node of the directory tree, the file is located at the leaf node of the directory tree, and the subdirectory is located at the middle node of the directory tree. Each file a...

AI Technical Summary

Problems solved by technology

[0003] The ACL setting mode of the node of existing directory tree is, after setting ACL to any node of directory tree, then setting ACL to all nodes that have the same access authority with described any node of directory tree, so to the directory tree Repeated setting of ACL for each node, the setting efficiency of node access rights is low

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