There are users that need to check if vfio_device is opened as cdev. e.g. vfio-pci. This adds a flag in vfio_device, it will be set in the cdev path when device is opened. This is not used at this moment, but a preparation for vfio device cdev support. Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx> --- include/linux/vfio.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/vfio.h b/include/linux/vfio.h index f8fb9ab25188..d9a0770e5fc1 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -62,6 +62,7 @@ struct vfio_device { struct iommufd_device *iommufd_device; bool iommufd_attached; #endif + bool cdev_opened; }; /** @@ -151,6 +152,12 @@ vfio_iommufd_physical_devid(struct vfio_device *vdev, u32 *id) ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) #endif +static inline bool vfio_device_cdev_opened(struct vfio_device *device) +{ + lockdep_assert_held(&device->dev_set->lock); + return device->cdev_opened; +} + /** * @migration_set_state: Optional callback to change the migration state for * devices that support migration. It's mandatory for -- 2.34.1