From nobody Sat Apr 5 00:14:08 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1550845258074531.4741294801368; Fri, 22 Feb 2019 06:20:58 -0800 (PST) Received: from localhost ([127.0.0.1]:51507 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gxBh1-0003lv-Kn for importer@patchew.org; Fri, 22 Feb 2019 09:20:47 -0500 Received: from eggs.gnu.org ([209.51.188.92]:38017) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gxBVF-0002O8-Qa for qemu-devel@nongnu.org; Fri, 22 Feb 2019 09:08:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gxBVA-0001qW-09 for qemu-devel@nongnu.org; Fri, 22 Feb 2019 09:08:33 -0500 Received: from mx1.redhat.com ([209.132.183.28]:44056) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gxBV1-0001Kb-7A; Fri, 22 Feb 2019 09:08:23 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 90A90308FF2D; Fri, 22 Feb 2019 14:08:13 +0000 (UTC) Received: from localhost (unknown [10.36.118.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id 229C95D9D4; Fri, 22 Feb 2019 14:08:12 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Date: Fri, 22 Feb 2019 14:07:37 +0000 Message-Id: <20190222140756.29834-9-stefanha@redhat.com> In-Reply-To: <20190222140756.29834-1-stefanha@redhat.com> References: <20190222140756.29834-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Fri, 22 Feb 2019 14:08:13 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 08/27] block/qcow: use qemu_iovec_init_buf X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , qemu-block@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: Vladimir Sementsov-Ogievskiy Use new qemu_iovec_init_buf() instead of qemu_iovec_init_external( ... , 1), which simplifies the code. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake Reviewed-by: Stefan Hajnoczi Message-id: 20190218140926.333779-9-vsementsov@virtuozzo.com Message-Id: <20190218140926.333779-9-vsementsov@virtuozzo.com> Signed-off-by: Stefan Hajnoczi --- block/qcow.c | 21 ++++----------------- 1 file changed, 4 insertions(+), 17 deletions(-) diff --git a/block/qcow.c b/block/qcow.c index 0a235bf393..409c700d33 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -628,7 +628,6 @@ static coroutine_fn int qcow_co_preadv(BlockDriverState= *bs, uint64_t offset, int offset_in_cluster; int ret =3D 0, n; uint64_t cluster_offset; - struct iovec hd_iov; QEMUIOVector hd_qiov; uint8_t *buf; void *orig_buf; @@ -661,9 +660,7 @@ static coroutine_fn int qcow_co_preadv(BlockDriverState= *bs, uint64_t offset, if (!cluster_offset) { if (bs->backing) { /* read from the base image */ - hd_iov.iov_base =3D (void *)buf; - hd_iov.iov_len =3D n; - qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); + qemu_iovec_init_buf(&hd_qiov, buf, n); qemu_co_mutex_unlock(&s->lock); /* qcow2 emits this on bs->file instead of bs->backing */ BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); @@ -688,9 +685,7 @@ static coroutine_fn int qcow_co_preadv(BlockDriverState= *bs, uint64_t offset, ret =3D -EIO; break; } - hd_iov.iov_base =3D (void *)buf; - hd_iov.iov_len =3D n; - qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); + qemu_iovec_init_buf(&hd_qiov, buf, n); qemu_co_mutex_unlock(&s->lock); BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO); ret =3D bdrv_co_preadv(bs->file, cluster_offset + offset_in_cl= uster, @@ -733,7 +728,6 @@ static coroutine_fn int qcow_co_pwritev(BlockDriverStat= e *bs, uint64_t offset, int offset_in_cluster; uint64_t cluster_offset; int ret =3D 0, n; - struct iovec hd_iov; QEMUIOVector hd_qiov; uint8_t *buf; void *orig_buf; @@ -779,9 +773,7 @@ static coroutine_fn int qcow_co_pwritev(BlockDriverStat= e *bs, uint64_t offset, } } =20 - hd_iov.iov_base =3D (void *)buf; - hd_iov.iov_len =3D n; - qemu_iovec_init_external(&hd_qiov, &hd_iov, 1); + qemu_iovec_init_buf(&hd_qiov, buf, n); qemu_co_mutex_unlock(&s->lock); BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO); ret =3D bdrv_co_pwritev(bs->file, cluster_offset + offset_in_clust= er, @@ -1062,7 +1054,6 @@ qcow_co_pwritev_compressed(BlockDriverState *bs, uint= 64_t offset, { BDRVQcowState *s =3D bs->opaque; QEMUIOVector hd_qiov; - struct iovec iov; z_stream strm; int ret, out_len; uint8_t *buf, *out_buf; @@ -1128,11 +1119,7 @@ qcow_co_pwritev_compressed(BlockDriverState *bs, uin= t64_t offset, } cluster_offset &=3D s->cluster_offset_mask; =20 - iov =3D (struct iovec) { - .iov_base =3D out_buf, - .iov_len =3D out_len, - }; - qemu_iovec_init_external(&hd_qiov, &iov, 1); + qemu_iovec_init_buf(&hd_qiov, out_buf, out_len); BLKDBG_EVENT(bs->file, BLKDBG_WRITE_COMPRESSED); ret =3D bdrv_co_pwritev(bs->file, cluster_offset, out_len, &hd_qiov, 0= ); if (ret < 0) { --=20 2.20.1