Re: [PATCH 03/10] vfio: Rename vfio_device_assign/unassign_container()

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On 2022/10/26 02:17, Jason Gunthorpe wrote:
These functions don't really assign anything anymore, they just increment
some refcounts and do a sanity check. Call them
vfio_group_[un]use_container()

Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
---
  drivers/vfio/container.c | 14 ++++++--------
  drivers/vfio/vfio.h      |  4 ++--
  drivers/vfio/vfio_main.c |  6 +++---
  3 files changed, 11 insertions(+), 13 deletions(-)

Reviewed-by: Yi Liu <yi.l.liu@xxxxxxxxx>

diff --git a/drivers/vfio/container.c b/drivers/vfio/container.c
index dd79a66ec62cad..499777930b08fa 100644
--- a/drivers/vfio/container.c
+++ b/drivers/vfio/container.c
@@ -511,10 +511,8 @@ void vfio_group_detach_container(struct vfio_group *group)
  	vfio_container_put(container);
  }
-int vfio_device_assign_container(struct vfio_device *device)
+int vfio_group_use_container(struct vfio_group *group)
  {
-	struct vfio_group *group = device->group;
-
  	lockdep_assert_held(&group->group_lock);
if (!group->container || !group->container->iommu_driver ||
@@ -529,13 +527,13 @@ int vfio_device_assign_container(struct vfio_device *device)
  	return 0;
  }
-void vfio_device_unassign_container(struct vfio_device *device)
+void vfio_group_unuse_container(struct vfio_group *group)
  {
-	lockdep_assert_held_write(&device->group->group_lock);
+	lockdep_assert_held(&group->group_lock);
- WARN_ON(device->group->container_users <= 1);
-	device->group->container_users--;
-	fput(device->group->opened_file);
+	WARN_ON(group->container_users <= 1);
+	group->container_users--;
+	fput(group->opened_file);
  }
/*
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h
index bcad54bbab08c4..f95f4925b83bbd 100644
--- a/drivers/vfio/vfio.h
+++ b/drivers/vfio/vfio.h
@@ -112,8 +112,8 @@ void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);
  bool vfio_assert_device_open(struct vfio_device *device);
struct vfio_container *vfio_container_from_file(struct file *filep);
-int vfio_device_assign_container(struct vfio_device *device);
-void vfio_device_unassign_container(struct vfio_device *device);
+int vfio_group_use_container(struct vfio_group *group);
+void vfio_group_unuse_container(struct vfio_group *group);
  int vfio_container_attach_group(struct vfio_container *container,
  				struct vfio_group *group);
  void vfio_group_detach_container(struct vfio_group *group);
diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index 204443ba3b3cd9..8d809ecd982b39 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -749,7 +749,7 @@ static int vfio_device_first_open(struct vfio_device *device)
  	 * it during close_device.
  	 */
  	mutex_lock(&device->group->group_lock);
-	ret = vfio_device_assign_container(device);
+	ret = vfio_group_use_container(device->group);
  	if (ret)
  		goto err_module_put;
@@ -764,7 +764,7 @@ static int vfio_device_first_open(struct vfio_device *device)
  	return 0;
err_container:
-	vfio_device_unassign_container(device);
+	vfio_group_unuse_container(device->group);
  err_module_put:
  	device->kvm = NULL;
  	mutex_unlock(&device->group->group_lock);
@@ -781,7 +781,7 @@ static void vfio_device_last_close(struct vfio_device *device)
  	if (device->ops->close_device)
  		device->ops->close_device(device);
  	device->kvm = NULL;
-	vfio_device_unassign_container(device);
+	vfio_group_unuse_container(device->group);
  	mutex_unlock(&device->group->group_lock);
  	module_put(device->dev->driver->owner);
  }

--
Regards,
Yi Liu



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