From nobody Sat Apr 27 12:14:16 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=virtuozzo.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1517494702585842.4292047911888; Thu, 1 Feb 2018 06:18:22 -0800 (PST) Received: from localhost ([::1]:39339 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ehFgv-0005vK-4B for importer@patchew.org; Thu, 01 Feb 2018 09:18:17 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46272) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ehFfg-0005Vu-1y for qemu-devel@nongnu.org; Thu, 01 Feb 2018 09:17:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ehFfY-0006vF-7L for qemu-devel@nongnu.org; Thu, 01 Feb 2018 09:17:00 -0500 Received: from mail-ve1eur01on0134.outbound.protection.outlook.com ([104.47.1.134]:39568 helo=EUR01-VE1-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ehFfX-0006uX-Az; Thu, 01 Feb 2018 09:16:52 -0500 Received: from xantnef-ws.sw.ru (195.214.232.6) by DB6PR0801MB1989.eurprd08.prod.outlook.com (2603:10a6:4:75::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.444.14; Thu, 1 Feb 2018 14:16:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=virtuozzo.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=uA6ba30c5My5Bu5pKq8cqPwGVkJPm3DHvbPJW8IJA78=; b=caliPZxGY2gS02gxbecFDVxeQgFuMYUFdYzHH2V50EATs5tVAtlfurps1owqJvbqUqzlhYKAovRTMLh3DcLib3++d0lycCI85Lx5o53+Ur8p6DyGj80SLK8jYqChfuYMtjrAIbW0V1ATUVpGa4AvoJc91+Lkf+PbsXrKXaaEIiw= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=anton.nefedov@virtuozzo.com; From: Anton Nefedov To: qemu-devel@nongnu.org Date: Thu, 1 Feb 2018 17:16:31 +0300 Message-Id: <1517494591-39369-1-git-send-email-anton.nefedov@virtuozzo.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [195.214.232.6] X-ClientProxiedBy: HE1PR05CA0183.eurprd05.prod.outlook.com (2603:10a6:3:f8::31) To DB6PR0801MB1989.eurprd08.prod.outlook.com (2603:10a6:4:75::22) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 64e59ffb-f37b-41cf-bd14-08d5697e6e26 X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(4534165)(7168020)(4627221)(201703031133081)(201702281549075)(5600026)(4604075)(2017052603307)(7153060)(7193020); SRVR:DB6PR0801MB1989; X-Microsoft-Exchange-Diagnostics: 1; DB6PR0801MB1989; 3:lyniToe47IqN1YMx+z8zG1oqY0zmFupJw0NnoyyaZvUfOxcBLP8HHIq7rx72subBpkoKHnCjlXSClgc+27Su3bLJxTT5ONvW/P8ILXVLBI9xUaG7yfihq0t/y03fdvlIWqOnuSfJu5fIZmQSJR5QV+hyy3hp1Fp928kx7+o9J6vpt5QkhWh04Gk3NJsq9/roFt1yX81aSPsKi8BnlqODxsjqJ4MJlh7098bURRgVZWKvIxkLqqnF7uLSVNYibnTC; 25:3NI72EvU+GtBFhwWjYEnQ3+ydokoDxXVyU6Jcslv0wMSVshbCUS25HH1wBy+XnbPTEuRPbShb0LW3P9RBFkqXN1Hp1BnrXibMFq3tEhWL9BfMKwGPYC1vBCJJI82cYoE2/N9OKxR+kZeZDGXnyjt/T7U2oAFQhL/YFQMGuBjkR3PYCD9WcXB2do1yLG2EpnOaJd3J1EkXOm8eXrhLoxxWqIy96quTLtn2Jd5gjV1PJ0zlx84WusKVpYHgAfJB7O4crRbrz/hUaCHiEpbkA5Z3BeMYHH3yrU8nMywSvF3cO1ibgpr9Q2xA6LTQ6xw4K/bd6iTIqH5WsX4Wypm9YAC/Q==; 31:2uaVCQId27HcN+oFgROLWe/S5LO25bSp2yinHumQcDPBdOSIDNuIyRz3BZVAvF7glVZKOkedTIkV4l0UmgOwfgfQeCDeniRZbEYpOKIMWAmJwIcf7QLCdx3U697fjs4tGj7FKBcsUL7Nj/2ufVE111eFV9dSF7Ye5Oloa/q4S2PozoKa+pBIhIyv4nyqOeWgf/1WQ+GFq00Marv65trRSNOi763JW54cNy56jSa58js= X-MS-TrafficTypeDiagnostic: DB6PR0801MB1989: X-Microsoft-Exchange-Diagnostics: 1; DB6PR0801MB1989; 20:4c+mGbh/UIqUC2UTWs/plKbpM8OVgAEoPioXy93MsHZfIrsohWy6rf0nW3Q4e4MiAUNue1hCKLCiwBB2eN3UbD+JtriF+MYBykefRGkRXIroFZ52ZAQtxyyxUiFrpDGxPOW9uijk+sguzuM8DUXnDFUjY10ZsUbpL69i12nmNYA3j8lc7T23VroFcEd7ZCxAs9+H7OMP/hJJYanKQ0RNxHP+c49ahBX3TgQhMcCHfCRQePRCmPnYqV/ITCzt1ycQ9/dTC8NohNdd7rAd62Txi7m07qX54mAH3nfK9o+6bxRlBOTi1UwqFHoG5PMMXE3i9l2AllE5ekhw/mFY+hFaUsDT6n7eCwmvPOPnmrJ6xvLa6EcsuzV7UStLc+ZyE1SgE+Bkg0RHyXz1LUAOeZ9A8DJqEPVV9hIPDGIrbfWXrjM=; 4:2jhWx/WTj4yU7y03kKm6CMcV4JKraZHZdOlTyWQVDOUgF8YxpapBjGBNB8S1imMMOrqXwPLKnnsZeZbdEKl3xrqSxZjk85FAbjsYB4igZVcDwEH2em46qjqlvIlSHyCfjkgrAnP8BiHOjdHYJ8hTtBEhqYhsQWiDoHJUKe7sUXZZKAan3+kzk0gZPm3ZKgVRDiqq3eE/5ewBmFBW5BHu5CfjXthdgg7F+5jyW5h6buhSCm2xvgSCGy8UdZrds6ZdOqXU19cWXp6xLjmiiZ9Jag== X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(6040501)(2401047)(5005006)(8121501046)(3002001)(10201501046)(3231101)(2400082)(944501161)(93006095)(93001095)(6041288)(20161123564045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123560045)(20161123562045)(20161123558120)(6072148)(201708071742011); SRVR:DB6PR0801MB1989; BCL:0; PCL:0; RULEID:; SRVR:DB6PR0801MB1989; X-Forefront-PRVS: 0570F1F193 X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10019020)(979002)(39380400002)(376002)(366004)(346002)(39850400004)(396003)(189003)(199004)(2906002)(50226002)(86362001)(478600001)(51416003)(16526019)(107886003)(68736007)(386003)(6506007)(316002)(186003)(16586007)(59450400001)(52116002)(66066001)(48376002)(50466002)(8936002)(25786009)(6666003)(5660300001)(105586002)(6916009)(36756003)(26005)(97736004)(53416004)(6486002)(47776003)(4326008)(6512007)(7736002)(2361001)(106356001)(55236004)(53936002)(2351001)(3846002)(81166006)(6116002)(8676002)(81156014)(69596002)(305945005)(969003)(989001)(999001)(1009001)(1019001); DIR:OUT; SFP:1102; SCL:1; SRVR:DB6PR0801MB1989; H:xantnef-ws.sw.ru; FPR:; SPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: None (protection.outlook.com: virtuozzo.com does not designate permitted sender hosts) X-Microsoft-Exchange-Diagnostics: =?us-ascii?Q?1; DB6PR0801MB1989; 23:vO3pX+Ke4Tkf1x/owdQtgacic9vOOXVhynLCLsp?= =?us-ascii?Q?UtLh/5Cd9PHhZOFJD941lwDGHgaJ4UNlofyzARCkG4wRRFd3PsOTn/wWscj2?= =?us-ascii?Q?s4fIentos6cAUE8UZRMT8vIXT3CVRvv7U6480vxs1Hc4Trn+cW+jf82x/C4a?= =?us-ascii?Q?czhbVSqGdxdo2U4LYnCwypFkDBGGJLg5MXgFeWj1GVXML7NYM5/sTgJlkXgq?= =?us-ascii?Q?/WW3XECKi0xA7G9WpNqErUWQhSf15U0YDsp1lkmfo0ZYBJG+Z5glyuFE6VFH?= =?us-ascii?Q?hoHRTFnRlCPkNKnIf13Ds8hfM8chOgDgBXIFM41Mn2Qf/lDoI/RB/GQyZ7gP?= =?us-ascii?Q?hAnve6/DMbji01S8NFL3aKgl65sZD7cVEOCK3usn/gAhaPvOY2YvMD3GJy3A?= =?us-ascii?Q?NU2BJv8KjmHfUuYRy/7LszbyNl33V3EA+alfBzf7wU6zDMmkA9LkmkoC62yP?= =?us-ascii?Q?ckbgxHFjepBovZ5xMMtfO0q9nvEhoiQncxphIsuWg+zoy35lOpgSxLhS6aVF?= =?us-ascii?Q?jsMDH4uJ4ciDEnG/ujz1pVj9BopJnitYEX8XRmQG3wAnBRDyjQ2oDFd6Oyip?= =?us-ascii?Q?IbRMMeeC2L3M9hSwVI1acU0bRi9UXN4vWfvuGSxTDBXC0+mOBoLnhIwW+hGC?= =?us-ascii?Q?Pi7E7r3cV5Jdf6v8eR+1bbz+e05eDEjE064CO+uCeJHBY6e2zY6r5hnPLIc6?= =?us-ascii?Q?eo8HywBVj9xK4YPUmiii/thmiegaBFWxUFZlTv+bdiKLHldzZGNyIkGJ82CQ?= =?us-ascii?Q?236ataKq2UXvusmhiS0g39y0lj2bOU3GsDz+mRJgoHmMDiVPo+fgOV6EkYTD?= =?us-ascii?Q?ypnbEshV8v4A1dN9UlH2dcv6Xk+7wnflq8AZRkT2kc6Hr9QHKotB4jWXpMJs?= =?us-ascii?Q?bzu7xQRVab76HSXa2XIjMCXjVghP5PuBOFX876Rla4N0RunXZjADLrQjAVF1?= =?us-ascii?Q?q687O2QmMbF+AEhtAwxBZLelDQvOrct+T1h+9BEk5i0lK9/DTU4BA6/8JTk5?= =?us-ascii?Q?EPWf5G2T34N7bMjtTwUN+yGs+ethoCoNXO92uE+yTlhGopcTdhWumMrjY0mc?= =?us-ascii?Q?hft16KIKGIgI1fNvg5mbs4BBjyCGmuZo17fW7ZljfiPRNSBJvhllQ3ze+sY/?= =?us-ascii?Q?x89HKVzBXrzvqJciHH3eT0729qPjXMCHeLICXx12MmZPjD2/x7NCGH9Fe7VW?= =?us-ascii?Q?+ZW/2BuCWFoly8N6SXY8NtHLzQoDf6MxRgEaU4hPVkQMabuA22VFkwssFOIJ?= =?us-ascii?Q?GXLjEGqtVCYMviuepOQ+RPDYwjngQqgjoYU1v4RBt8N5ZfMa4yLz+RVD4+2N?= =?us-ascii?Q?/aQ=3D=3D?= X-Microsoft-Exchange-Diagnostics: 1; DB6PR0801MB1989; 6:U5D9ZOiZL/HWRXcmn5N1q6sqALrB/eV7TI6E2fUTRUQVePrj/tsr+QSy9o0/DoI6PVfVSLsE0TfFL4/OtHHztidxgDXW08XJTN68xTRxtmvwHU2G3La9qUHBQ8LVlclUzq1oNKmqoWtNvVZIK32qTqyLf83d2zMA8RyQCX0X1P00L6QrjdgCcC6a+UnSClJJeZr97GMp7OKH11AK+NARAozwL39gsiA69On/Z0ORqk50W2FXMYFMVQXvzP2b2j6ggAJ43oCWA70tYX2qq0jPkmabzlTV6r4as2zggIy4tySPLCyvKVsgOpuisPZUWRlaeNcXR5th2sC5V2YBnhGVesCEVulVK5CrJjXhIGls/zU=; 5:TYD+Kj51gvL8Fwti/K7VeJ5m8eT7nQcDwdbotr5GX8Ypv6JN5sPxqeJDAvdjnQuFK44yIOzDv4p7vluUo03SKXfrpHhXxgiyE6hq/zQaXhVmxTDq5x90rIOC7YFX+rqo3D6bQ7TEXWQh5uzO8BAdSh7UPLjjmIm4k4R/ojzaTRE=; 24:S8sqSglbw4Pjv1cTIo8ONWuPkxsthuXmfnDKdBtaKENcmCeYPR52oOenJntVgISgL+duPqhnObqvnz4C13rm66Z/F3aPtEqpdm2ufBltzpA=; 7:ZKtAxhCSvfZePGdAJXm2YYpTJ3cN/Alfdj44aVdyzHmzMzekJV12Y+/6gPNM9BwLls2ivDVkkepL9J5Pp5zjNbCOOsKky1/TR/h9r1/V8/0ZN0LlpWJTfjUSpYZ3ZALvgTYPjgtoZ8KLXc3/Y7hODUm1sC4nXGiGJSJG3BsdGAhvTH+zDCxMNDWb/v+4oGpQb3runWMk8qsnJKF7sWJV5wzM9Bxy6Eoeo87ElhiMjyTwopLYCuk6nTBSlhgshkia SpamDiagnosticOutput: 1:99 SpamDiagnosticMetadata: NSPM X-Microsoft-Exchange-Diagnostics: 1; DB6PR0801MB1989; 20:Ernm+s9cVYXwsgde+nifz6c4X0t/zM6CP24nMU8OQC0Q2KbAGyo84C1//VvMqYptGDUohdUluKsEzv9du3NkHzHYSmvyIV848F7w96qBivzvMAQDqXTB3YK7Cqa0uj8f8booQJVSxmzC3APk1gvDsBQfrCkfkRgLjezBhHGuGfg= X-OriginatorOrg: virtuozzo.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Feb 2018 14:16:47.0590 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 64e59ffb-f37b-41cf-bd14-08d5697e6e26 X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 0bc7f26d-0264-416e-a6fc-8352af79c58f X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB6PR0801MB1989 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.1.134 Subject: [Qemu-devel] [PATCH] block: fix write with zero flag set and iovector provided 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: kwolf@redhat.com, Anton Nefedov , famz@redhat.com, qemu-block@nongnu.org, mreitz@redhat.com, stefanha@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The normal bdrv_co_pwritev() use is either - BDRV_REQ_ZERO_WRITE reset and iovector provided - BDRV_REQ_ZERO_WRITE set and iovector =3D=3D NULL while - the flag reset and iovector =3D=3D NULL is an assertion failure in bdrv_co_do_zero_pwritev() - the flag set and iovector provided is in fact allowed (the flag prevails and zeroes are written) However the alignment logic does not support the latter case so the padding areas get overwritten with zeroes. Solution could be to forbid such case or just use bdrv_co_do_zero_pwritev() alignment for it which also makes the code a bit more obvious anyway. Signed-off-by: Anton Nefedov Reviewed-by: Eric Blake --- block/io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/io.c b/block/io.c index 7ea4023..cf63fd0 100644 --- a/block/io.c +++ b/block/io.c @@ -1701,7 +1701,7 @@ int coroutine_fn bdrv_co_pwritev(BdrvChild *child, */ tracked_request_begin(&req, bs, offset, bytes, BDRV_TRACKED_WRITE); =20 - if (!qiov) { + if (flags & BDRV_REQ_ZERO_WRITE) { ret =3D bdrv_co_do_zero_pwritev(child, offset, bytes, flags, &req); goto out; } --=20 2.7.4