On 10/21/2011 04:36 PM, Dave Airlie wrote:
On Fri, Oct 21, 2011 at 3:18 PM, Dave Airlie<airlied@xxxxxxxxx> wrote:
On Fri, Oct 21, 2011 at 3:06 PM, Thomas Hellstrom<thellstrom@xxxxxxxxxx> wrote:
Dave,
What is the drm control device nodes really used for?
On my fc14 system it seems like it has world rw privileges, and full access
to all modesetting ioctls.
Is that the intention?
No, and I just realised we packaged a broken udev rule.
It should be root only, oops.
Its intention is for setting up multi-seat and gpgpu access to the drm.
change /etc/udev/rules.d/91-modeset.rules to be 0600.
I've filed updates to Fedora to fix this, no other distro should be
using or caring about these device nodes yet, since we never really
got GPGPU going yet.
Dave.
Sounds good. I was actually mostly curios on the intended usage pattern
of the control node.
I found some things on the DRM wikis, but it doesn't at all seem
consistent with what's in DRM.
Why do we have CONTROL_ALLOW on all modesetting ioctls?, also this code
in drm_crtc.c seems odd:
if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
...
Isn't that equivalent to
if (file_priv->minor->type == DRM_MINOR_CONTROL) { ?
Any enlightenment would be appreciated.
Thanks,
/Thomas
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