[PATCH 3.12 094/170] rbd: handle parent_overlap on writes correctly

From: Ilya Dryomov 3.12-stable review patch. If anyone has any objections, please let me know. === commit 9638556a276125553549fdfe349c464481ec2f39 upstream. The following check in rbd_img_obj_request_submit() rbd_dev->parent_overlap <= obj_request->img_offset allows the

[PATCH 3.12 094/170] rbd: handle parent_overlap on writes correctly

From: Ilya Dryomov ilya.dryo...@inktank.com 3.12-stable review patch. If anyone has any objections, please let me know. === commit 9638556a276125553549fdfe349c464481ec2f39 upstream. The following check in rbd_img_obj_request_submit() rbd_dev-parent_overlap =