From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kay Sievers Date: Thu, 17 Feb 2005 19:09:41 +0000 Subject: The Next Generation Message-Id: <20050217190941.GA1561@vrfy.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org After the recent discussion about a possible new hotplug handler layout I see the need for a completely different approach. We need to clean up the current mess, reduce all the silly options and give a sane environment without all the hacks and shortcomings. A real "next generation" can only be sane with managed hotplug events, which prevents races with sysfs timing and cares about order and dependencies between the events. The directory device match logic, even the more advanced one proposed yesterday, will never meet our requirements to limit system usage at event time. We should expect a ever growing number of hotplug events and need to be prepared to execute only the stuff which is really needed for a specific device. For that reason, we should get rid of all the just too simple brute-force logic in /etc/hotplug/*, /etc/hotplug.d/ and /etc/dev.d/, which requires scripts to check if they are called for the right device. I propose to make the udev architecture _the_ generic hotplug handler. We use the same rules which we are using today to compose a name for a specific device. We just need something like a POSTPROCESS="/sbin/some-program" key for our rules which adds a program to a list of programs to be executed after the device node is created. udev needs a bit of tweaking to handle physical devices, but it applies the same logic as we currently use for device naming. This way we would get a nice, clean and understandable rule based event handling with a single source of policy, and not the current mess with confusing directories spreaded all over the system. And sure, it would give us the efficiency one can expect from a "next generation" thing. :) What do you think? Thanks, Kay ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id396&op=click _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel