From patchwork Tue Apr 28 14:59:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 465615 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 B3D711400B7 for ; Wed, 29 Apr 2015 01:07:05 +1000 (AEST) Received: from localhost ([::1]:34048 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn76F-0000Op-Qr for incoming@patchwork.ozlabs.org; Tue, 28 Apr 2015 11:07:03 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39919) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn716-0007pk-I1 for qemu-devel@nongnu.org; Tue, 28 Apr 2015 11:01:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Yn711-0001te-Qj for qemu-devel@nongnu.org; Tue, 28 Apr 2015 11:01:44 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56552) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn70s-0001pL-5r; Tue, 28 Apr 2015 11:01:30 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id t3SF1TVh027551 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 28 Apr 2015 11:01:29 -0400 Received: from noname.redhat.com (ovpn-116-103.ams2.redhat.com [10.36.116.103]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t3SF118r021485; Tue, 28 Apr 2015 11:01:28 -0400 From: Kevin Wolf To: qemu-block@nongnu.org Date: Tue, 28 Apr 2015 16:59:58 +0200 Message-Id: <1430233258-31807-17-git-send-email-kwolf@redhat.com> In-Reply-To: <1430233258-31807-1-git-send-email-kwolf@redhat.com> References: <1430233258-31807-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [Qemu-devel] [PULL 16/76] block-backend: Expose bdrv_write_zeroes() 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 Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- block/block-backend.c | 11 +++++++++++ include/sysemu/block-backend.h | 2 ++ 2 files changed, 13 insertions(+) diff --git a/block/block-backend.c b/block/block-backend.c index 48b6e4c..93e46f3 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -515,6 +515,17 @@ int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, return bdrv_write(blk->bs, sector_num, buf, nb_sectors); } +int blk_write_zeroes(BlockBackend *blk, int64_t sector_num, + int nb_sectors, BdrvRequestFlags flags) +{ + int ret = blk_check_request(blk, sector_num, nb_sectors); + if (ret < 0) { + return ret; + } + + return bdrv_write_zeroes(blk->bs, sector_num, nb_sectors, flags); +} + static void error_callback_bh(void *opaque) { struct BlockBackendAIOCB *acb = opaque; diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 77e9b9c..b4a4d5e 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -87,6 +87,8 @@ int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf, int nb_sectors); int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, int nb_sectors); +int blk_write_zeroes(BlockBackend *blk, int64_t sector_num, + int nb_sectors, BdrvRequestFlags flags); BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num, int nb_sectors, BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);