Hi, I have a simple filesystem that I did for learning purpose https://github.com/psankar/simplefs Now, I would like to add a few settings to my filesystem (such as the number of blocks that should be allocated in an extent by default, maximum fragmentation score after which defrag should be automatically handled etc.) I would like to have the ability to not just set these settings, but export them to a file and restore these settings later. Is there some kind of a settings infrastructure code that is available in the linux kernel or should I be developing something specific to my filesystem ? I would also like to have some kind of validation system also as part of the settings interface. For example: If a setting can accept only ints, trying to set a string to that should be disabled, min and max values (range) for values of settings, etc. I googled and found that sysctl interface and the sysfs interfaces seem to be doing something similar. But I was not sure which to pick as the wikipedia pages were not as elaborate as I would like. So my question is: Is there a settings infrastructure provided by the linux kernel and is any filesystem (or any other kernel components) that make use of such a settings infrastrucutre ? Thanks. -- Sankar P http://psankar.blogspot.com