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Wed, 8 Apr 2020 09:31:12 +0000 From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Subject: [PATCH 7/9] block/io: add bdrv_do_pwrite_zeroes Date: Wed, 8 Apr 2020 12:30:49 +0300 Message-ID: <20200408093051.9893-8-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200408093051.9893-1-vsementsov@virtuozzo.com> References: <20200408093051.9893-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable Content-Type: text/plain X-ClientProxiedBy: AM6PR01CA0041.eurprd01.prod.exchangelabs.com (2603:10a6:20b:e0::18) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from kvm.sw.ru (185.215.60.139) by AM6PR01CA0041.eurprd01.prod.exchangelabs.com (2603:10a6:20b:e0::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2900.15 via Frontend Transport; Wed, 8 Apr 2020 09:31:11 +0000 X-Mailer: git-send-email 2.21.0 X-Originating-IP: [185.215.60.139] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d1548b69-30a3-4ed6-231c-08d7db9f93b9 X-MS-TrafficTypeDiagnostic: AM7PR08MB5365: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3826; 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X-Received-From: 2a01:111:f400:fe1f::705 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We'll need a bdrv_co_pwrite_zeroes version without inc/dec in_flight to be used in further implementation of bdrv_make_zero. Signed-off-by: Vladimir Sementsov-Ogievskiy --- block/io.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/block/io.c b/block/io.c index 760170731f..b1fc8b2367 100644 --- a/block/io.c +++ b/block/io.c @@ -2016,8 +2016,10 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *chi= ld, return ret; } =20 -int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset, - int bytes, BdrvRequestFlags flags) +/* To be called between exactly one pair of bdrv_inc/dec_in_flight() */ +static int coroutine_fn +bdrv_do_pwrite_zeroes(BdrvChild *child, int64_t offset, int bytes, + BdrvRequestFlags flags) { trace_bdrv_co_pwrite_zeroes(child->bs, offset, bytes, flags); =20 @@ -2025,8 +2027,21 @@ int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *ch= ild, int64_t offset, flags &=3D ~BDRV_REQ_MAY_UNMAP; } =20 - return bdrv_co_pwritev(child, offset, bytes, NULL, - BDRV_REQ_ZERO_WRITE | flags); + return bdrv_do_pwritev_part(child, offset, bytes, NULL, 0, + BDRV_REQ_ZERO_WRITE | flags); +} + +int coroutine_fn +bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset, int bytes, + BdrvRequestFlags flags) +{ + int ret; + + bdrv_inc_in_flight(child->bs); + ret =3D bdrv_do_pwrite_zeroes(child, offset, bytes, flags); + bdrv_dec_in_flight(child->bs); + + return ret; } =20 typedef struct RwCo { --=20 2.21.0