From patchwork Wed Sep 20 09:21:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Denis V. Lunev" X-Patchwork-Id: 1837120 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RrCkL4Yc9z1ynF for ; Wed, 20 Sep 2023 19:23:06 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qitPT-00086W-UU; Wed, 20 Sep 2023 05:22:15 -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 1qitPK-0007xt-68; Wed, 20 Sep 2023 05:22:08 -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 1qitPG-0001sY-RH; Wed, 20 Sep 2023 05:22:05 -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 1qitL2-0028Y8-20; Wed, 20 Sep 2023 11:21:05 +0200 From: "Denis V. Lunev" To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, "Denis V. Lunev" , Alexander Ivanov Subject: [PULL 21/22] parallels: naive implementation of parallels_co_pwrite_zeroes Date: Wed, 20 Sep 2023 11:21:07 +0200 Message-Id: <20230920092108.258898-22-den@openvz.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230920092108.258898-1-den@openvz.org> References: <20230920092108.258898-1-den@openvz.org> MIME-Version: 1.0 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: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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 1ef23f6669..a6d64d0d47 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -582,6 +582,19 @@ done: return ret; } +static int coroutine_fn +parallels_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes, + BdrvRequestFlags flags) +{ + /* + * The zero flag is missed in the Parallels format specification. We can + * resort to discard if we have no backing file (this condition is checked + * 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 = { .bdrv_co_create_opts = parallels_co_create_opts, .bdrv_co_check = parallels_co_check, .bdrv_co_pdiscard = parallels_co_pdiscard, + .bdrv_co_pwrite_zeroes = parallels_co_pwrite_zeroes, }; static void bdrv_parallels_init(void)