From nobody Mon May 12 13:22:46 2025 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1695283126; cv=none; d=zohomail.com; s=zohoarc; b=Rb/J9T0hXdyicWG9vs02aj9SYSfw1FPIOYm72P8dDbZ/U/vm1RuqjKMdc6mlTf7LTeJwNoKMVrlMq527Me8USp3idx11O6q/1cTtQ+SgDa5TuJ+GsqsgIJHhGRaEAgQXCoKvf/L+RvpQH4XOGMLZKpPl+kDvT5fkli0fHF3LV3g= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1695283126; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=8a+qsAZhnBFgZ/MMZOlRKC1WJ+EIlCzGXm/qRhrZhhk=; b=Jg6fdZrqaocb8CEBmIlBR1yxjFPsFfD2VN8qJ+VQC9wvc7nJre0D7Dnv3niDSf+0EHoiqiL4x1fUQr0C6+w8kbBUsIFHRL6bphVwUVlBxh1Eo60Y5mQwqqX2GbjOSrZyReP0kIIWEpq69wvimcsdEQOqetDKqap1idTC4Ql9teA= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1695283126522490.322873136564; Thu, 21 Sep 2023 00:58:46 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qjEYd-0002il-E8; Thu, 21 Sep 2023 03:57:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qjEYO-0002Vi-7j; Thu, 21 Sep 2023 03:56:53 -0400 Received: from relay.virtuozzo.com ([130.117.225.111]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qjEYC-0002Hv-4L; Thu, 21 Sep 2023 03:56:51 -0400 Received: from ch-vpn.virtuozzo.com ([130.117.225.6] helo=iris.sw.ru) by relay.virtuozzo.com with esmtp (Exim 4.96) (envelope-from ) id 1qjEWV-00BsUn-2e; Thu, 21 Sep 2023 09:55:08 +0200 To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, "Denis V. Lunev" , Alexander Ivanov Subject: [PULL v2 21/22] parallels: naive implementation of parallels_co_pwrite_zeroes Date: Thu, 21 Sep 2023 09:54:59 +0200 Message-Id: <20230921075500.694585-22-den@openvz.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230921075500.694585-1-den@openvz.org> References: <20230921075500.694585-1-den@openvz.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=130.117.225.111; envelope-from=den@openvz.org; helo=relay.virtuozzo.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: "Denis V. Lunev" From: "Denis V. Lunev" via Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZM-MESSAGEID: 1695283127990100001 Content-Type: text/plain; charset="utf-8" The zero flag is missed in the Parallels format specification. We can resort to discard if we have no backing file. Signed-off-by: Denis V. Lunev Reviewed-by: Alexander Ivanov --- block/parallels.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/block/parallels.c b/block/parallels.c index 1808029f14..d026ce9e2f 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -582,6 +582,19 @@ done: return ret; } =20 +static int coroutine_fn GRAPH_RDLOCK +parallels_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t b= ytes, + BdrvRequestFlags flags) +{ + /* + * The zero flag is missed in the Parallels format specification. We c= an + * resort to discard if we have no backing file (this condition is che= cked + * inside parallels_co_pdiscard(). + */ + return parallels_co_pdiscard(bs, offset, bytes); +} + + static void parallels_check_unclean(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix) @@ -1463,6 +1476,7 @@ static BlockDriver bdrv_parallels =3D { .bdrv_co_create_opts =3D parallels_co_create_opts, .bdrv_co_check =3D parallels_co_check, .bdrv_co_pdiscard =3D parallels_co_pdiscard, + .bdrv_co_pwrite_zeroes =3D parallels_co_pwrite_zeroes, }; =20 static void bdrv_parallels_init(void) --=20 2.34.1