Character Device Drivers in deep




Character Device Drivers in deep

Updated on Oct 10: Added Downloads section

What will you learn from this course?

  • Introduction to character drivers

  • What is device number and device file

  • Allocating device number - statically and dynamically

  • Creating device file - Manually(mknod) and automatically (udev)

  • Registering character device and its file operation with Kernel

  • Copying data from user space to kernel space and vice versa

  • Understanding the various structures - struct file and struct inode

  • Implementation of open, release, read, write, llseek, ioctl file operations

  • How to create multiple device nodes and add support for private data

  • Flow of write system call from kernel system call entry point to driver write file operations

  • Handling all the error cases in ioctl implementation

  • Sending a signal to user space from kernel space

  • Various access control mechanisms and capabilities

  • Misc Driver

API's covered in this course:

  • MAJOR

  • MINOR

  • MKDEV

  • register_chrdev_region

  • alloc_chrdev_region

  • class_create

  • device_create

  • class_destroy

  • device_destroy

  • unregister_chrdev_region

  • imajor

  • iminor

  • copy_from_user

  • copy_to_user

  • put_user

  • get_user

  • print_dev_t

  • format_dev_t

  • strnlen_user

  • container_of

  • access_ok

Commands used in this course:

  • mknod

  • udevadm monitor

Linux Kernel Programming - Character Device Drivers

Url: View Details

What you will learn
  • Write character device driver from scratch
  • Understand the various file operations provided by character driver

Rating: 3.95

Level: Beginner Level

Duration: 4.5 hours

Instructor: Linux Trainer


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