Proyectos Sistemas Operativos I 2024-1

Test Kernel Module

This is a test kernel module

Equipos

1.- Master Jedi Iván Chavero

2.- DA: Adrian González y Danna Corral

3.- Kylo Ren: Adolfo Escobar

4.- Helado Oscuro: Efraín Domínguez, Julián Lozoya, Ángel Torres, Jesús González

5.- Jar Jar Blinks: Carlos Aguilar, Said Gonzalez, Majo Ramirez

6.- Halcón Milenario: Damián López

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 [email protected]: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/