On Wed, Mar 05, 2025 at 01:53:22PM +0100, Peter Skvarka wrote: > Thank you, I have this commit on my machine and investigating it. > > Described AF_LOCAL sockets are for me candidate no.1. > I am also considering using signal (siginfo.h and signalvar.h) for sending > signal from kernel to user process with small data. > But like I described I need bidirectional communications, > does provide signal interface in siginfo.h and signalvar.h also sending > signal from user space to kernel module ? > Or what do you thing about this idea at all ?
In the past, I have used a cloning device node, and ioctl, for this. You can define and implement arbitrary message-passing interfaces in that way. And you can either have the ioctl block waiting for kernel response, or you can implement select/poll/kevent. The other super quick way to do this, though it's a little hacky, is with our dynamic sysctl(3)/sysctl(9) framework. However, in that case, you will have to poll for changes originated on the kernel side. -- Thor Lancelot Simon t...@panix.com "The liberties...lose much of their value whenever those who have greater private means are permitted to use their advantages to control the course of public debate." -John Rawls
