linux-kernel - Re: [RFC] What are the goals for the architecture of an in-kernel IR system?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	29 Nov 2009 13:01:00 +0100
From:	lirc@...telmus.de (Christoph Bartelmus)
To:	jonsmirl@...il.com
Cc:	superm1@...ntu.com
Subject: Re: [RFC] What are the goals for the architecture of an in-kernel IR  system?

Hi Jon,

on 27 Nov 09 at 12:49, Jon Smirl wrote:
[...]
> Christoph, take what you know from all of the years of working on LIRC
> and design the perfect in-kernel system. This is the big chance to
> redesign IR support and get rid of any past mistakes. Incorporate any
> useful chunks of code and knowledge from the existing LIRC into the
> new design. Drop legacy APIs, get rid of daemons, etc. You can do this
> redesign in parallel with existing LIRC. Everyone can continue using
> the existing code while the new scheme is being built. Think of it as
> LIRC 2.0. You can lead this design effort, you're the most experience
> developer in the IR area.

This is a very difficult thing for me to do. I must admit that I'm very  
biased.
Because lircd is the only userspace application that uses the LIRC kernel  
interface, we never had any problems changing the interface when needed.
I can't say there's much legacy stuff inside. I'm quite happy with the  
interface.
The other thing is that I can't really move the decoder from userspace to  
kernel because there are way too many userspace drivers that do require a  
userspace decoder. LIRC also is running on FreeBSD, MacOS and even Cygwin.  
So letting the userspace drivers take advantage of a potential Linux in- 
kernel decoder is not an option for me either.
I'm having my 'LIRC maintainer' hat on mostly during this discussion and I  
do understand that from Linux kernel perspective things look different.

> Take advantage of this window to make a
> design that is fully integrated with Linux - put IR on equal footing
> with the keyboard and mouse as it should be.

That's a question that I have not answered for myself concludingly.
Is a remote control really on exactly the same level as a keyboard or  
mouse?

Christoph
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/