Overwriting copy functionality in filesystem

[Valdis Kl=?utf-8?Q?=c4=93?=tnieks]

On Sat, 23 Mar 2019 22:29:45 +0530, Bharath Vedartham said:

> I was wondering how we can overwrite the copy functionality while
> writing our own filesystem in linux. 
> VFS does not offer any sort of API for copy. I think it calls create and
> write when we execute the copy the file/dir.

Which you can verify using strace.  Which you should already be familiar with
if you have the experience needed to write a usable filesystem.

> I am interested in overwriting the way copy happens in my
> filesystem(which I am writing for fun :p). 

And what, exactly, do you want copy to do differently on the API level,
and on the file system level?