From patchwork Wed May 5 09:51:58 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 51710 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 3BAE7B7D59 for ; Thu, 6 May 2010 03:25:05 +1000 (EST) Received: from localhost ([127.0.0.1]:57128 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O9iLG-0005V9-FK for incoming@patchwork.ozlabs.org; Wed, 05 May 2010 13:25:02 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1O9bHL-00054b-52 for qemu-devel@nongnu.org; Wed, 05 May 2010 05:52:31 -0400 Received: from [140.186.70.92] (port=54233 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1O9bHI-00052D-Ud for qemu-devel@nongnu.org; Wed, 05 May 2010 05:52:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1O9bHD-00012R-Jz for qemu-devel@nongnu.org; Wed, 05 May 2010 05:52:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:8341) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1O9bHD-000123-BC for qemu-devel@nongnu.org; Wed, 05 May 2010 05:52:23 -0400 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o459qMQ7023186 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 5 May 2010 05:52:22 -0400 Received: from localhost.localdomain (dhcp-5-217.str.redhat.com [10.32.5.217]) by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o459qKrO003370; Wed, 5 May 2010 05:52:21 -0400 From: Kevin Wolf To: qemu-devel@nongnu.org Date: Wed, 5 May 2010 11:51:58 +0200 Message-Id: <1273053118-14001-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.21 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. Cc: kwolf@redhat.com Subject: [Qemu-devel] [PATCH] block: Avoid unchecked casts for AIOCBs X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Use container_of for one direction and &acb->common for the other one. Signed-off-by: Kevin Wolf Reviewed-by: Christoph Hellwig --- block.c | 3 ++- block/blkdebug.c | 4 ++-- block/qcow.c | 2 +- block/qcow2.c | 2 +- block/vdi.c | 2 +- 5 files changed, 7 insertions(+), 6 deletions(-) diff --git a/block.c b/block.c index 7e3552d..10a2b31 100644 --- a/block.c +++ b/block.c @@ -2119,7 +2119,8 @@ typedef struct BlockDriverAIOCBSync { static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) { - BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; + BlockDriverAIOCBSync *acb = + container_of(blockacb, BlockDriverAIOCBSync, common); qemu_bh_delete(acb->bh); acb->bh = NULL; qemu_aio_release(acb); diff --git a/block/blkdebug.c b/block/blkdebug.c index bb4a91a..8325f75 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -320,7 +320,7 @@ static void error_callback_bh(void *opaque) static void blkdebug_aio_cancel(BlockDriverAIOCB *blockacb) { - BlkdebugAIOCB *acb = (BlkdebugAIOCB*) blockacb; + BlkdebugAIOCB *acb = container_of(blockacb, BlkdebugAIOCB, common); qemu_aio_release(acb); } @@ -347,7 +347,7 @@ static BlockDriverAIOCB *inject_error(BlockDriverState *bs, acb->bh = bh; qemu_bh_schedule(bh); - return (BlockDriverAIOCB*) acb; + return &acb->common; } static BlockDriverAIOCB *blkdebug_aio_readv(BlockDriverState *bs, diff --git a/block/qcow.c b/block/qcow.c index 2883c40..449858f 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -502,7 +502,7 @@ typedef struct QCowAIOCB { static void qcow_aio_cancel(BlockDriverAIOCB *blockacb) { - QCowAIOCB *acb = (QCowAIOCB *)blockacb; + QCowAIOCB *acb = container_of(blockacb, QCowAIOCB, common); if (acb->hd_aiocb) bdrv_aio_cancel(acb->hd_aiocb); qemu_aio_release(acb); diff --git a/block/qcow2.c b/block/qcow2.c index 21ed6f8..40bd32a 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -340,7 +340,7 @@ typedef struct QCowAIOCB { static void qcow_aio_cancel(BlockDriverAIOCB *blockacb) { - QCowAIOCB *acb = (QCowAIOCB *)blockacb; + QCowAIOCB *acb = container_of(blockacb, QCowAIOCB, common); if (acb->hd_aiocb) bdrv_aio_cancel(acb->hd_aiocb); qemu_aio_release(acb); diff --git a/block/vdi.c b/block/vdi.c index 1d257b4..2b4d2c2 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -469,7 +469,7 @@ static int vdi_is_allocated(BlockDriverState *bs, int64_t sector_num, static void vdi_aio_cancel(BlockDriverAIOCB *blockacb) { /* TODO: This code is untested. How can I get it executed? */ - VdiAIOCB *acb = (VdiAIOCB *)blockacb; + VdiAIOCB *acb = container_of(blockacb, VdiAIOCB, common); logout("\n"); if (acb->hd_aiocb) { bdrv_aio_cancel(acb->hd_aiocb);