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Commit 15e52d9a authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 

Pull Ceph fix from Sage Weil:
 "This fixes a corner case for cloned RBD images"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: handle parent_overlap on writes correctly
parents d91d66e8 9638556a

drivers/block/rbd.c

+9 −1
Original line number Diff line number Diff line
@@ -1431,6 +1431,14 @@ static bool obj_request_exists_test(struct rbd_obj_request *obj_request) 
	return test_bit(OBJ_REQ_EXISTS, &obj_request->flags) != 0;

}



static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request)

{

	struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev;



	return obj_request->img_offset <

	    round_up(rbd_dev->parent_overlap, rbd_obj_bytes(&rbd_dev->header));

}



static void rbd_obj_request_get(struct rbd_obj_request *obj_request)

{

	dout("%s: obj %p (was %d)\n", __func__, obj_request,
@@ -2748,7 +2756,7 @@ static int rbd_img_obj_request_submit(struct rbd_obj_request *obj_request) 
	 */

	if (!img_request_write_test(img_request) ||

		!img_request_layered_test(img_request) ||

		rbd_dev->parent_overlap <= obj_request->img_offset ||

		!obj_request_overlaps_parent(obj_request) ||

		((known = obj_request_known_test(obj_request)) &&

			obj_request_exists_test(obj_request))) {