What is the Linux driver subsystem? What are the common ones?

Linux is a UNIX-like operating system that is free to use and spread freely. It is also a multi-user, multi-task, multi-thread and multi-CPU operating system based on POSIX. So what are the driver subsystems in Linux? The following is an introduction to the specific content.

The Linux driver subsystem is a key component of the Linux kernel and is mainly used to coordinate communication between hardware devices and the operating system. Common Linux driver subsystems include input subsystem, network subsystem, USB subsystem and file system. Each subsystem assumes specific functions and responsibilities, ensuring seamless interaction between hardware devices and the operating system. The input subsystem is responsible for handling input devices such as keyboards and mice, the network subsystem manages network connections and data transmission, and the USB subsystem handles the connection and

of USB devices.

The device model is a framework in the Linux kernel for managing and representing devices. It provides drivers with a unified device representation method, allowing drivers to interact with devices more easily.

The character device subsystem is a framework for managing character device drivers. It provides a mechanism to interact with the device through file I/O operations. Users can operate various character devices through the character device subsystem, such as terminal devices, serial port devices, etc.

The block device subsystem is a framework specifically designed to manage block device drivers, making storage and access operations on block devices more efficient.

The file system subsystem is responsible for the management and operation of file systems in Linux systems. It supports various file system types and maps them to the virtual file system layer of Linux.

The network device subsystem is responsible for managing network interface devices and network protocol stacks, and providing configuration, management and data transmission support for network devices.

The main role of the bus subsystem is to manage the connections between different types of buses and devices. It provides an abstraction layer that enables drivers to communicate with various bus types in a unified manner.

　7. USB device subsystem: The USB device subsystem is used to manage and support USB devices. It is responsible for handling operations such as plug and unplug events, configuration and communication of USB devices.

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