Commits
Josh Durgin committed 3c5df893677
rbd: read image size for discard check safely In rbd_img_request_fill() the image size is only checked to determine whether we can truncate an object instead of zeroing it for discard requests. Take rbd_dev->header_rwsem while reading the image size, and move this read into the discard check, so that non-discard ops don't need to take the semaphore in this function. Signed-off-by: Josh Durgin <josh.durgin@inktank.com>