From owner-freebsd-current@freebsd.org Sun Aug 11 02:03:14 2019 Return-Path: Delivered-To: freebsd-current@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2674DABED2 for ; Sun, 11 Aug 2019 02:03:14 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) Received: from CAN01-TO1-obe.outbound.protection.outlook.com (mail-eopbgr670053.outbound.protection.outlook.com [40.107.67.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "GlobalSign Organization Validation CA - SHA256 - G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 465j1X4jvPz4Rc8 for ; Sun, 11 Aug 2019 02:03:12 +0000 (UTC) (envelope-from rmacklem@uoguelph.ca) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=XjiyBY94bz23NCFFvacYoGook8A0nFtZ87MD+ishTUaP2ruo42R3qejI13HsgUzgIiZ7TXEW9sIlt8Wb/gM1SUjy2I/6UccCk3PjyuSU4g1SU7UCOJ67y+K9mxX1m9pQWPPE8RSABbBoD8dMWcmPkdmS40gqVm1wrlKOyM8zwSah/5WQpi5nbjgHtzdIRduM4P16Ed6eWiNEOSjJrgQ/oR/TaRwuVVKXY1M3eN9Pla3bi4XWqJt+lJ5sWvNw4sBuYhpuDfIDhpXwI8LpP9VnP4Wdu1B1/BIuNh5OddNMALD4jORaHoN77s9N6pYm9lXofyP3IRKuk8+Cd488ItZVgg== 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-SenderADCheck; bh=081Dsg6v+3u7FrPYA7iMLGkOYNdO7LFPGbXy9sj3W9E=; b=IyQqRernmceicedn8gCvRFe410rP+yAGs51NDBg1JS0v19J0z92og2nIm/tu5794y0NwMT2xlkATjscQi1umoDY45pjFKag6e4IXQv43ABJ/FrNyl7aB0wzUz8DWZEMXVUnJSXLZyN7WINWAWnRhNxP5gApea/gNYewmnhdvGIEUCKCPnEZ/hSS1xevdetZPYXgr5XW4efFmrtqdkU2j5D3czpi1KStvrd0kkapuRZwjSZ1x3Id0REatiFbR8E+gIdbFPXSDBfWcVm0KxKDMVcspBX7QKSqprnqoogj2wGxLCweO7zo9CeVseVRurwzYh7wSbe8PR9905Nd3qbhsMw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=uoguelph.ca; dmarc=pass action=none header.from=uoguelph.ca; dkim=pass header.d=uoguelph.ca; arc=none Received: from YTBPR01MB3616.CANPRD01.PROD.OUTLOOK.COM (10.255.12.82) by YTBPR01MB2909.CANPRD01.PROD.OUTLOOK.COM (10.255.45.224) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2157.15; Sun, 11 Aug 2019 02:03:10 +0000 Received: from YTBPR01MB3616.CANPRD01.PROD.OUTLOOK.COM ([fe80::fc05:2310:90ce:16e]) by YTBPR01MB3616.CANPRD01.PROD.OUTLOOK.COM ([fe80::fc05:2310:90ce:16e%6]) with mapi id 15.20.2157.022; Sun, 11 Aug 2019 02:03:10 +0000 From: Rick Macklem To: "freebsd-current@FreeBSD.org" Subject: RFC: should lseek(SEEK_DATA/SEEK_HOLE) return ENOTTY? Thread-Topic: RFC: should lseek(SEEK_DATA/SEEK_HOLE) return ENOTTY? Thread-Index: AQHVT+jQ5wsNrJT2jUSYLr8e3O7szQ== Date: Sun, 11 Aug 2019 02:03:10 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 5031c7e1-804e-497e-c9ae-08d71e000fb1 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:YTBPR01MB2909; x-ms-traffictypediagnostic: YTBPR01MB2909: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8273; x-forefront-prvs: 0126A32F74 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(346002)(376002)(136003)(366004)(396003)(39850400004)(199004)(189003)(33656002)(8676002)(2351001)(6916009)(4744005)(99286004)(186003)(74316002)(476003)(14454004)(6506007)(316002)(786003)(102836004)(86362001)(305945005)(25786009)(7696005)(52536014)(256004)(46003)(478600001)(2501003)(66476007)(64756008)(66446008)(66946007)(66556008)(81156014)(2906002)(5660300002)(486006)(71200400001)(53936002)(81166006)(8936002)(71190400001)(6436002)(55016002)(9686003)(5640700003)(76116006); DIR:OUT; SFP:1101; SCL:1; SRVR:YTBPR01MB2909; H:YTBPR01MB3616.CANPRD01.PROD.OUTLOOK.COM; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: uoguelph.ca does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: SielOKaYZug8pMDWRoW6FXr97YK4UKDAIBD/xTSvIwKuzpJwxRxFG9xXwe+WTnVrFL8cm0ldKtoGda93vKhhh1xEEgGWJz10GRRYiWNd8OUDRrKSywQ351al/fBk66lGd0l8hfy+A6Iyzyl6//0Wgs2LIJnIbm5q/n6qHSHVjuF6btsEcDEo1OgPf0wuDtKHiAKnURxI2JyoSSXWPpdU+J26ZuJlOgnNlJVvW9Sw+ZogkHKgvO9m9VL6YZRvDgPZtwB6EcQkxzDV1UBiov/mhw+5H0StBIB33Jc9HVTRaMF5PDEJUv8hjOa3cUniQ0Sv9/z/TbdWJvvqiUpwhhoyPH8mQ5oSf5YaWOExwpAwHhv7YGO/UYnxQ6Y8Pk1OOnTFwQ0JDcKGe1qkLErNgNR4HjDg5nVNdYHm9rU1rD3uu4E= x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: uoguelph.ca X-MS-Exchange-CrossTenant-Network-Message-Id: 5031c7e1-804e-497e-c9ae-08d71e000fb1 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Aug 2019 02:03:10.7807 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: be62a12b-2cad-49a1-a5fa-85f4f3156a7d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: OmoQwW76xhCb5k7AUufIZUUJGdtHcWUiTq6XYROeeC+KJMj/9zBHzJg7QyRQHtZ/PA5C/h58OEQjifcB0eeuKw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: YTBPR01MB2909 X-Rspamd-Queue-Id: 465j1X4jvPz4Rc8 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of rmacklem@uoguelph.ca designates 40.107.67.53 as permitted sender) smtp.mailfrom=rmacklem@uoguelph.ca X-Spamd-Result: default: False [-4.42 / 15.00]; RCVD_TLS_LAST(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:40.107.0.0/16]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[uoguelph.ca]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCPT_COUNT_ONE(0.00)[1]; RCVD_COUNT_THREE(0.00)[3]; IP_SCORE(-1.13)[ipnet: 40.64.0.0/10(-3.34), asn: 8075(-2.28), country: US(-0.05)]; NEURAL_HAM_SHORT(-0.98)[-0.982,0]; RCVD_IN_DNSWL_NONE(0.00)[53.67.107.40.list.dnswl.org : 127.0.3.0]; TO_DN_EQ_ADDR_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:8075, ipnet:40.64.0.0/10, country:US]; MIME_TRACE(0.00)[0:+]; ARC_ALLOW(-1.00)[i=1] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 Aug 2019 02:03:14 -0000 Hi, I've noticed that, if you do a lseek(SEEK_DATA/SEEK_HOLE) on a file that resides in a file system that does not support holes, ENOTTY is returned. This error isn't listed for lseek() and seems a liitle weird. I can see a couple of alternatives to this: 1 - Return a different error. Maybe ENXIO? or 2 - Have lseek() do the trivial implementation when the VOP_IOCTL() fails. - For SEEK_DATA, just return the offset given as argument and for SEEK_H= OLE return the file's size as the offset. What do others think? rick ps: The man page should be updated, whatever is done w.r.t. this.