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drm: Check mode object lease status in all master ioctl paths [v4]

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Attempts to modify un-leased objects are rejected with an error.
Information returned about unleased objects is modified to make them
appear unusable and/or disconnected.

Changes for v2 as suggested by Daniel Vetter <daniel.vetter@ffwll.ch>:

 * With the change in the __drm_mode_object_find API to pass the
   file_priv along, we can now centralize most of the lease-based
   access checks in that function.

 * A few places skip that API and require in-line checks.

Changes for v3 provided by Dave Airlie <airlied@redhat.com>

 * remove support for leasing encoders.
 * add support for leasing planes.

Changes for v4

 * Only call drm_lease_held if DRIVER_MODESET.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Keith Packard
2017-04-09 22:35:34 -06:00
committed by Dave Airlie
parent 2ed077e467
commit 7de440db20
7 changed files with 70 additions and 23 deletions
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2
drivers/gpu/drm/drm_auth.c
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@@ -310,7 +310,7 @@ out:
*/
bool drm_is_current_master(struct drm_file *fpriv)
{
return fpriv->is_master && fpriv->master == fpriv->minor->dev->master;
return fpriv->is_master && drm_lease_owner(fpriv->master) == fpriv->minor->dev->master;
}
EXPORT_SYMBOL(drm_is_current_master);