From patchwork Wed Jun 21 11:11:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Avihai Horon X-Patchwork-Id: 1797864 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=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256 header.s=selector2 header.b=C7iAN4Nk; dkim-atps=neutral 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 4QmLTm1kxlz20Wk for ; Wed, 21 Jun 2023 21:13:32 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qBvla-0007PR-BB; Wed, 21 Jun 2023 07:12:51 -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 1qBvlX-0007ME-VL for qemu-devel@nongnu.org; Wed, 21 Jun 2023 07:12:48 -0400 Received: from mail-bn7nam10on2062c.outbound.protection.outlook.com ([2a01:111:f400:7e8a::62c] helo=NAM10-BN7-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qBvlV-0002Xq-8S for qemu-devel@nongnu.org; Wed, 21 Jun 2023 07:12:47 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=bhDbLVvGSn7WjrIj+ho/EICdapmyn7zntY+6anhJsxjKIULjvHa729DEz/0bV8zZD7IGB3sTPlkJ3fGcKq292RdIEISDWcqycNFhnrxivVDBjE+fFZPwq4j8st+lw7thrfYveg3QXLcOfEdylO5VLe1e9z9sHSh7wZwGf5zpUnl7WJV4Kk12XxtsuEMf01Y2qeFeyj2oT0ucbhNJBnWmHYUfMqrpGNAttr1N36vR/88DSjbw0qccw4+dode36wEsp26tVURWX6Mr8oQfIZwhxhAmF5N/+FQLDFoTwdT6+TxOuB6PayjJcBMM94fSAC8L/rwMBp5mj4vfqtETOpgQKQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=2x4zCSxKb7rP9YzA5xOn59RCxNucU5BY6IkAtnQ2zDs=; b=JPZKpn36d/J9IrOEKV+uqFdCIRDoZj2ZsD0RkT1vHOT6jwKMMvBk1ASXfWaKUi78/fuGZERoydZrzFJCAKiXaRqbmnXMr+FuXIgVQ8gLP/7l/wfMIF73htmYlWkOsc1qsFuq8n/NWSkOuhzRf3oTkg9ANANE2eHoVNkcNcTPxVjxOFj2xBD9uUVK+KixMNMLpJtpmERS0ln8u2Vct4u5ovaE98xvT+F47tL3ERMNn/GpdlpcAU+/nXdrCoCIx+wU3Hm+ql+lOo8pAXFSUGiAXur9W04C4ix8ppohdnVWzC4lo3XkMSQJg7YsrUhVLv7pPMjuOVJ9NOKAe70uxJri2Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.161) smtp.rcpttodomain=nongnu.org smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=2x4zCSxKb7rP9YzA5xOn59RCxNucU5BY6IkAtnQ2zDs=; b=C7iAN4NkUVDAhhpY2iEqkZvdH5rv6v7+B/ry1QQhWY/RvSGO78lHzVbYdMcGU1/PNUqcyFKgLARd2cWsGaCAEVmI8URgy7Yzlo7+LMUmpHk8xbriqVFPgJgHh7W+kQ+ii6R+iZPTl515DCLyjv5toEzyePyKd/+/9+t7fYgMtTyhRNl6/kKNIqzc8v/zmlKMnvTTVQI6QEKGRKhvIfU7M4nvxDaAVj6I7F1xx/SpN2TTVjXOGpNK+vSN3qrC/9fZIQl/fL+ySevG7VjXy5GPwh1rpDKfoasL8vNcX/OHhroJ7Ppk5unyjNzWK9xjK7Bm+cNn9YGYY7ulD3tn/JV4bQ== Received: from CY8PR11CA0018.namprd11.prod.outlook.com (2603:10b6:930:48::7) by DM4PR12MB8473.namprd12.prod.outlook.com (2603:10b6:8:183::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6521.21; Wed, 21 Jun 2023 11:12:41 +0000 Received: from CY4PEPF0000EDD4.namprd03.prod.outlook.com (2603:10b6:930:48:cafe::b6) by CY8PR11CA0018.outlook.office365.com (2603:10b6:930:48::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6521.23 via Frontend Transport; Wed, 21 Jun 2023 11:12:41 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.161) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.161 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.161) by CY4PEPF0000EDD4.mail.protection.outlook.com (10.167.241.208) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6521.20 via Frontend Transport; Wed, 21 Jun 2023 11:12:40 +0000 Received: from rnnvmail205.nvidia.com (10.129.68.10) by mail.nvidia.com (10.129.200.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.5; Wed, 21 Jun 2023 04:12:30 -0700 Received: from rnnvmail205.nvidia.com (10.129.68.10) by rnnvmail205.nvidia.com (10.129.68.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.37; Wed, 21 Jun 2023 04:12:30 -0700 Received: from vdi.nvidia.com (10.127.8.9) by mail.nvidia.com (10.129.68.10) with Microsoft SMTP Server id 15.2.986.37 via Frontend Transport; Wed, 21 Jun 2023 04:12:26 -0700 From: Avihai Horon To: CC: Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_G?= =?utf-8?q?oater?= , Juan Quintela , Peter Xu , Leonardo Bras , Eric Blake , Markus Armbruster , Thomas Huth , Laurent Vivier , Paolo Bonzini , Yishai Hadas , Jason Gunthorpe , Maor Gottlieb , Avihai Horon , Kirti Wankhede , Tarun Gupta , Joao Martins Subject: [PATCH v6 5/8] vfio/migration: Refactor vfio_save_block() to return saved data size Date: Wed, 21 Jun 2023 14:11:58 +0300 Message-ID: <20230621111201.29729-6-avihaih@nvidia.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20230621111201.29729-1-avihaih@nvidia.com> References: <20230621111201.29729-1-avihaih@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EDD4:EE_|DM4PR12MB8473:EE_ X-MS-Office365-Filtering-Correlation-Id: 5214141c-9e72-476d-dee5-08db72486dc1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge2.nvidia.com; CAT:NONE; SFS:(13230028)(4636009)(39860400002)(376002)(346002)(396003)(136003)(451199021)(40470700004)(36840700001)(46966006)(70586007)(41300700001)(70206006)(40460700003)(4326008)(6916009)(2616005)(7636003)(186003)(356005)(82310400005)(86362001)(26005)(36860700001)(1076003)(66574015)(83380400001)(47076005)(426003)(336012)(82740400003)(478600001)(36756003)(7696005)(6666004)(54906003)(40480700001)(2906002)(5660300002)(7416002)(8936002)(8676002)(316002); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2023 11:12:40.6284 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5214141c-9e72-476d-dee5-08db72486dc1 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.161]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EDD4.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB8473 Received-SPF: softfail client-ip=2a01:111:f400:7e8a::62c; envelope-from=avihaih@nvidia.com; helo=NAM10-BN7-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 Refactor vfio_save_block() to return the size of saved data on success and -errno on error. This will be used in next patch to implement VFIO migration pre-copy support. Signed-off-by: Avihai Horon Reviewed-by: Cédric Le Goater Reviewed-by: Juan Quintela Tested-by: YangHang Liu --- hw/vfio/migration.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 6b58dddb88..235978fd68 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -241,8 +241,8 @@ static int vfio_query_stop_copy_size(VFIODevice *vbasedev, return 0; } -/* Returns 1 if end-of-stream is reached, 0 if more data and -errno if error */ -static int vfio_save_block(QEMUFile *f, VFIOMigration *migration) +/* Returns the size of saved data on success and -errno on error */ +static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration) { ssize_t data_size; @@ -252,7 +252,7 @@ static int vfio_save_block(QEMUFile *f, VFIOMigration *migration) return -errno; } if (data_size == 0) { - return 1; + return 0; } qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE); @@ -262,7 +262,7 @@ static int vfio_save_block(QEMUFile *f, VFIOMigration *migration) trace_vfio_save_block(migration->vbasedev->name, data_size); - return qemu_file_get_error(f); + return qemu_file_get_error(f) ?: data_size; } /* ---------------------------------------------------------------------- */ @@ -335,6 +335,7 @@ static void vfio_state_pending_exact(void *opaque, uint64_t *must_precopy, static int vfio_save_complete_precopy(QEMUFile *f, void *opaque) { VFIODevice *vbasedev = opaque; + ssize_t data_size; int ret; /* We reach here with device state STOP only */ @@ -345,11 +346,11 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque) } do { - ret = vfio_save_block(f, vbasedev->migration); - if (ret < 0) { - return ret; + data_size = vfio_save_block(f, vbasedev->migration); + if (data_size < 0) { + return data_size; } - } while (!ret); + } while (data_size); qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE); ret = qemu_file_get_error(f);