Test Kernel Module

This is a test kernel module

Team

1. Iván Chavero Master Jedi
2. Tamales de la 28 Padwan Team
3. Pedro Padwan Team
4. Millenials Padwan Team
5. Panes Padwan Team
6. Bandona Padwan Team
7. Unix Padwan Team

Module building

Build dependencies

On a Fedora system install the Development Tools and the C Development Tools and Libraries.

~$ sudo dnf groupinstall -y 'Development Tools' 'C Development Tools and Libraries'
~$ sudo dnf install -y kernel-headers kernel-devel

On Debian based systems:

~$ sudo apt install -y build-essential linux-headers-$(uname -r)

Build module

Enter the module directory

~$ cd test_kernel_module/kernel_module

The Makefile defines how to build the module, execute the make command to compile the module.

kernel_module $ make

Load module

Load the module using the insmod command.

~$ sudo insmod super_module.ko

Check if the module has been loaded

~$ journalctl -f | grep kernel

Check module major number

The major number is needed for creating the device that is used to interact with the module

~$ journalctl  | grep mknod

Remove module

Remove the module using the rmmod command

~$ sudo rmmod super_module

Create the module device

This module registers a device major number but it does not create the device. Create the /dev/super_module device manually.

~$ sudo mknod /dev/super_module c <device_major_number> 0

Test the module

~$ cat /dev/super_module

Git Basic commands

Clone this repository

~$ git clone git@github.com:Sistemas-Operativos-I-UACH/test_kernel_module.git

Use a branch other than main

~$ git checkout *yourbranch*

Add a file to next commit

Add the README.md file to the commit:

~$ git add README.md

Commit a the changes

~$ git commit -m 'commit message'

or to open your favorite editor and add a more extense commit message:

~$ git commit

Push changes to our public github repository

This team is using github.com as the public repository and the Master Jedi repository as the main one.

~$ git  push

Get and integrate the latest changes of the current branch from the public git repository

~$ git pull

Get all changes in all the branches

~$ git fetch --all

Once you get the changes you must pull them to integrate them in the branch

~$ git checkout your_branch
~$ git pull

Be happy

References

• https://education.github.com/git-cheat-sheet-education.pdf
• https://code.visualstudio.com/docs/editor/versioncontrol
• https://www.thegeekstuff.com/2013/07/write-linux-kernel-module/