From patchwork Mon Jul 14 11:43:00 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 369600 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 920B614009C for ; Mon, 14 Jul 2014 21:48:22 +1000 (EST) Received: from localhost ([::1]:56690 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X6ek0-0003r2-Qm for incoming@patchwork.ozlabs.org; Mon, 14 Jul 2014 07:48:20 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38305) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X6efT-0004Jn-T7 for qemu-devel@nongnu.org; Mon, 14 Jul 2014 07:43:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X6efM-0005Gl-Dt for qemu-devel@nongnu.org; Mon, 14 Jul 2014 07:43:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51581) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X6efM-0005GU-51 for qemu-devel@nongnu.org; Mon, 14 Jul 2014 07:43:32 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s6EBhVMm028877 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Mon, 14 Jul 2014 07:43:31 -0400 Received: from noname.redhat.com (ovpn-116-24.ams2.redhat.com [10.36.116.24]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s6EBhGgT008192; Mon, 14 Jul 2014 07:43:30 -0400 From: Kevin Wolf To: qemu-devel@nongnu.org Date: Mon, 14 Jul 2014 13:43:00 +0200 Message-Id: <1405338192-18850-11-git-send-email-kwolf@redhat.com> In-Reply-To: <1405338192-18850-1-git-send-email-kwolf@redhat.com> References: <1405338192-18850-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com Subject: [Qemu-devel] [PULL v2 for-2.1 10/22] block: Assert qiov length matches request length X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org At least raw-posix relies on this because it can allocate bounce buffers based on the request length, but access it using all of the qiov entries later. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- block.c | 2 ++ block/raw-posix.c | 15 +++++++++++---- 2 files changed, 13 insertions(+), 4 deletions(-) diff --git a/block.c b/block.c index 0143268..3e252a2 100644 --- a/block.c +++ b/block.c @@ -3010,6 +3010,7 @@ static int coroutine_fn bdrv_aligned_preadv(BlockDriverState *bs, assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); + assert(!qiov || bytes == qiov->size); /* Handle Copy on Read and associated serialisation */ if (flags & BDRV_REQ_COPY_ON_READ) { @@ -3279,6 +3280,7 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); + assert(!qiov || bytes == qiov->size); waited = wait_serialising_requests(req); assert(!waited || !req->serialising); diff --git a/block/raw-posix.c b/block/raw-posix.c index a857def..2bcc73d 100644 --- a/block/raw-posix.c +++ b/block/raw-posix.c @@ -790,6 +790,7 @@ static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len); p += aiocb->aio_iov[i].iov_len; } + assert(p - buf == aiocb->aio_nbytes); } nbytes = handle_aiocb_rw_linear(aiocb, buf); @@ -804,9 +805,11 @@ static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb) copy = aiocb->aio_iov[i].iov_len; } memcpy(aiocb->aio_iov[i].iov_base, p, copy); + assert(count >= copy); p += copy; count -= copy; } + assert(count == 0); } qemu_vfree(buf); @@ -993,12 +996,14 @@ static int paio_submit_co(BlockDriverState *bs, int fd, acb->aio_type = type; acb->aio_fildes = fd; + acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE; + acb->aio_offset = sector_num * BDRV_SECTOR_SIZE; + if (qiov) { acb->aio_iov = qiov->iov; acb->aio_niov = qiov->niov; + assert(qiov->size == acb->aio_nbytes); } - acb->aio_nbytes = nb_sectors * 512; - acb->aio_offset = sector_num * 512; trace_paio_submit_co(sector_num, nb_sectors, type); pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); @@ -1016,12 +1021,14 @@ static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd, acb->aio_type = type; acb->aio_fildes = fd; + acb->aio_nbytes = nb_sectors * BDRV_SECTOR_SIZE; + acb->aio_offset = sector_num * BDRV_SECTOR_SIZE; + if (qiov) { acb->aio_iov = qiov->iov; acb->aio_niov = qiov->niov; + assert(qiov->size == acb->aio_nbytes); } - acb->aio_nbytes = nb_sectors * 512; - acb->aio_offset = sector_num * 512; trace_paio_submit(acb, opaque, sector_num, nb_sectors, type); pool = aio_get_thread_pool(bdrv_get_aio_context(bs));