Default file_operations methods?

Martin Galvan omgalvan.86 at
Mon Sep 11 23:15:18 EDT 2017

Hi everyone, I'm testing out a small kernel module and wondered what
the default file_operations methods are. I know about no_llseek for
llseek, but what about the rest? Is there anything like no_llseek for
e.g. read, write and so on?

The reason I'm asking this is that my module should only allow
opening, closing, and calling a couple ioctls. Reading, writing and
such wouldn't make sense here.

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