Minor 0 is the VFIO container device (/dev/vfio/vfio). On it's own
the container does not provide a user with any privileged access. It
only supports API version check and extension check ioctls. Only by
attaching a VFIO group to the container does it gain any access. Set
the mode of the container to allow access.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
#include <linux/rwsem.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/stat.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/vfio.h>
*/
static char *vfio_devnode(struct device *dev, umode_t *mode)
{
+ if (MINOR(dev->devt) == 0)
+ *mode = S_IRUGO | S_IWUGO;
+
return kasprintf(GFP_KERNEL, "vfio/%s", dev_name(dev));
}