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• Source document: kernel/filesystem/vfs/index.rst

• Translation time: 2025-06-29 09:58:04

• Translation model: hunyuan-turbos-latest

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VFS Virtual File System

In DragonOS, VFS acts as an adapter that abstracts the differences between specific file systems, providing a unified file operation interface to the outside.

VFS is the core of DragonOS’s file system, offering a standardized set of file system interfaces that enable DragonOS to support multiple different file systems. The main functions of VFS include:

• Providing a unified file system interface

• Offering file system mount and unmount mechanisms (MountFS)

• Providing file abstraction (File)

• Providing file system abstraction (FileSystem)

• Offering IndexNode abstraction

• Providing file system caching and synchronization mechanisms (not yet implemented)

• Supporting the mounting of disk devices onto the file system (currently supports EXT4 and vfat types of virtio disks)

Table of Contents

• Design
• VFS API Documentation
• Design