Date: Tue, 23 Dec 2008 20:30:56 +0100 From: Rink Springer <rink@FreeBSD.org> To: Ed Schouten <ed@80386.nl> Cc: Dag-Erling Sm?rgrav <des@des.no>, FreeBSD Current <freebsd-current@freebsd.org>, current@freebsd.org, Alfred Perlstein <alfred@freebsd.org>, Hans Petter Selasky <hselasky@c2i.net> Subject: Re: HEADSUP usb2 (usb4bsd) to become default in 2 weeks. Message-ID: <20081223193056.GA65161@rink.nu> In-Reply-To: <20081223190808.GC1176@hoeg.nl> References: <20081222214010.GA18389@elvis.mu.org> <20081223151942.GP18389@elvis.mu.org> <86y6y6ubxc.fsf@ds4.des.no> <200812231736.29198.hselasky@c2i.net> <20081223190808.GC1176@hoeg.nl>
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On Tue, Dec 23, 2008 at 08:08:08PM +0100, Ed Schouten wrote: > * Hans Petter Selasky <hselasky@c2i.net> wrote: > > On Tuesday 23 December 2008, Dag-Erling Sm?rgrav wrote: > > > There are serious issues with the permissions model, which were raised > > > in Strasbourg and AFAIK never addressed. > > > > This is more complicated than you think. If you require a change in this area > > than please point me to an existing example implementing something similar. I > > know about the "kern_priv()" function, but there are no specific groups for > > USB, which needs to be discussed. The current implementation is good enough > > for most use cases in my opinion. > > Just create device nodes in devfs. Let devfs handle the permissions. If > they are insufficient, then we should add ACL support to devfs. Due to the design of USB2, this isn't quite as obvious as it may seem; for example, an USB device has multiple endpoints, and if some process opens endpoint 1 and 3, you don't want to block another process from opening endpoint 2, for example. There are a lot of interesting combinations possible, and this is only the tip of the iceberg :-) Regards, -- Rink P.W. Springer - http://rink.nu "Chance favours the prepared mind" - Penn
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