From patchwork Thu Jan 22 20:10:11 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Max Reitz X-Patchwork-Id: 431985 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 85416140083 for ; Fri, 23 Jan 2015 07:16:24 +1100 (AEDT) Received: from localhost ([::1]:55875 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YEOAw-00071X-EH for incoming@patchwork.ozlabs.org; Thu, 22 Jan 2015 15:16:22 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49237) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YEO5M-0006LI-7f for qemu-devel@nongnu.org; Thu, 22 Jan 2015 15:10:37 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YEO5G-00060x-M1 for qemu-devel@nongnu.org; Thu, 22 Jan 2015 15:10:36 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53018) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YEO5F-00060m-UN for qemu-devel@nongnu.org; Thu, 22 Jan 2015 15:10:30 -0500 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 t0MKASqq019948 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Thu, 22 Jan 2015 15:10:29 -0500 Received: from localhost ([10.18.17.71]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t0MKARhS025809 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NO); Thu, 22 Jan 2015 15:10:28 -0500 From: Max Reitz To: qemu-devel@nongnu.org Date: Thu, 22 Jan 2015 15:10:11 -0500 Message-Id: <1421957411-31759-15-git-send-email-mreitz@redhat.com> In-Reply-To: <1421957411-31759-1-git-send-email-mreitz@redhat.com> References: <1421957411-31759-1-git-send-email-mreitz@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: Kevin Wolf , Markus Armbruster , Stefan Hajnoczi , Max Reitz Subject: [Qemu-devel] [PATCH v2 14/14] block: Keep bdrv_check*_request()'s return value 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 Do not throw away the value returned by bdrv_check_request() and bdrv_check_byte_request(). Fix up some coding style issues in the proximity of the affected hunks. Signed-off-by: Max Reitz --- block.c | 35 ++++++++++++++++++++++++----------- 1 file changed, 24 insertions(+), 11 deletions(-) diff --git a/block.c b/block.c index 9412377..aa1758b 100644 --- a/block.c +++ b/block.c @@ -3099,8 +3099,10 @@ static int coroutine_fn bdrv_co_do_preadv(BlockDriverState *bs, if (!drv) { return -ENOMEDIUM; } - if (bdrv_check_byte_request(bs, offset, bytes)) { - return -EIO; + + ret = bdrv_check_byte_request(bs, offset, bytes); + if (ret < 0) { + return ret; } if (bs->copy_on_read) { @@ -3346,8 +3348,10 @@ static int coroutine_fn bdrv_co_do_pwritev(BlockDriverState *bs, if (bs->read_only) { return -EACCES; } - if (bdrv_check_byte_request(bs, offset, bytes)) { - return -EIO; + + ret = bdrv_check_byte_request(bs, offset, bytes); + if (ret < 0) { + return ret; } /* throttling disk I/O */ @@ -4171,12 +4175,18 @@ int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, const uint8_t *buf, int nb_sectors) { BlockDriver *drv = bs->drv; - if (!drv) + int ret; + + if (!drv) { return -ENOMEDIUM; - if (!drv->bdrv_write_compressed) + } + if (!drv->bdrv_write_compressed) { return -ENOTSUP; - if (bdrv_check_request(bs, sector_num, nb_sectors)) - return -EIO; + } + ret = bdrv_check_request(bs, sector_num, nb_sectors); + if (ret < 0) { + return ret; + } assert(QLIST_EMPTY(&bs->dirty_bitmaps)); @@ -5094,12 +5104,15 @@ static void coroutine_fn bdrv_discard_co_entry(void *opaque) int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) { - int max_discard; + int max_discard, ret; if (!bs->drv) { return -ENOMEDIUM; - } else if (bdrv_check_request(bs, sector_num, nb_sectors)) { - return -EIO; + } + + ret = bdrv_check_request(bs, sector_num, nb_sectors); + if (ret < 0) { + return ret; } else if (bs->read_only) { return -EROFS; }