On Tue, Jul 30, 2013 at 10:19:54PM +0000, Rotate 13 wrote: > On Tue, 30 Jul 2013 16:41:14 -0500, Brooks Davis <[email protected]> wrote: > > > On Mon, Jul 29, 2013 at 05:14:04PM +0000, Rotate 13 wrote: > >> How to disable *all* GEOM tasting of newly-attached devices? I looked > >> through the manuals, searched web, grepped sysctl -ad. I only find > >> sysctl to disable all tasting for graid (kern.geom.raid.enable). > >> > >> Example, if I have removable drive I want to pop in and access from > >> userland with open("/dev/foo0", O_RDONLY); without various GEOM > >> modules first trying to understand. > > > > As far as I know there is no way to do this, but the existence of > > partition tables shouldn't have any effect on your ability to open the raw > > device as long as you haven't configured something in devd or similar to > > open those partitions. > > Any pointer to look in sources for where triggers the tasting? I > understand each GEOM has the taste code of its own... but something > must start it all when device is inserted.
The creation of a geom provider triggers the tasting. I suppose you could create a new driver to matches the device preferentally to umass or what ever device it normally attaches it and provides a simple node for it. That sounds like a lot of work and you haven't explained why you can't just let the tasting happen and ignore any partions that are found. -- Brooks
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