Dear, I would like to create a Loadable Kernel Module that redirects the file operations of a given filename to the functions defined in the module such that whenever any process calls a redirected file operation the module's function is called instead of the one defined by the fs. Is this possible? any drawbacks or better ways? I am currently reading about linux filesystems and trying to understand how an inode is populated with the file operations (i_fop pointer to file_operations struct). My understanding is that when the filesystem is mounted, somehow, the file_operations structure i_fop of the inodes created in memory are set, and whenever a process calls a file operation the filesystem will use the function defined in i_fop. The idea is to create a loadable module that modifies the file operations of a given file to point to the functions defined in the module. One of my concerns (and there are many for now) is to know when the i_fop of an in-memory inode is set and if it is refreshed while it is in-memory, or is it guaranteed that the f_iop is set only once at inode create time. If the given file is not used by any process I think there will be no inode for that file in the cache, but if there is at least one process that opened the file then is it guaranteed that the i_fop will be set only once at the time of the inode cache creation, as long as there is at least one process that has the file open? A sample program showing how to find the inode of a given filename and how to modify the i_fop structure is welcome. Kind regards Taoufik