5.4.2. Module Exit Function

Try these first

1. 1.

   What is the purpose of the module exit function?

   Hint

   Think about cleanup activities.

2. 2.

   Provide a basic structure of a module exit function in C.

   Hint

   Remember to use the __exit annotation.

3. 3.

   What is the main function of the module exit function?

   • To log module load events
   • To deregister functionalities and free resources
   • To recompile the kernel

   Hint

   Think about maintenance and cleanup tasks.

4. 4.

   True or False: A module can be unloaded without defining an exit function.

   • True
   • False

   Hint

   Consider the implications of cleanup.

5. 5.

   Describe the potential consequences of not implementing an exit function in a kernel module. Include examples.

   Hint

   Think about how this impacts system performance over time.

6. 6.

   Write an exit function for a hypothetical module that manages a network connection. Identify what resources need to be released and the logic for each step.

   Hint

   Identify all resources that would be allocated during the module's active state.