rbd: define rbd_dev_unparent()
Define rbd_dev_unparent() to encapsulate cleaning up parent data
structures from a layered rbd image.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index d861c71..9c2b20a 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1837,6 +1837,17 @@
kmem_cache_free(rbd_obj_request_cache, obj_request);
}
+/* It's OK to call this for a device with no parent */
+
+static void rbd_spec_put(struct rbd_spec *spec);
+static void rbd_dev_unparent(struct rbd_device *rbd_dev)
+{
+ rbd_dev_remove_parent(rbd_dev);
+ rbd_spec_put(rbd_dev->parent_spec);
+ rbd_dev->parent_spec = NULL;
+ rbd_dev->parent_overlap = 0;
+}
+
/*
* Caller is responsible for filling in the list of object requests
* that comprises the image request, and the Linux request pointer
@@ -4491,10 +4502,7 @@
{
struct rbd_image_header *header;
- rbd_dev_remove_parent(rbd_dev);
- rbd_spec_put(rbd_dev->parent_spec);
- rbd_dev->parent_spec = NULL;
- rbd_dev->parent_overlap = 0;
+ rbd_dev_unparent(rbd_dev);
/* Free dynamic fields from the header, then zero it out */
@@ -4570,7 +4578,7 @@
return 0;
out_err:
if (parent) {
- rbd_spec_put(rbd_dev->parent_spec);
+ rbd_dev_unparent(rbd_dev);
kfree(rbd_dev->header_name);
rbd_dev_destroy(parent);
} else {