From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84380C433E1 for ; Tue, 30 Jun 2020 07:51:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6B8FB20768 for ; Tue, 30 Jun 2020 07:51:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731147AbgF3Hve (ORCPT ); Tue, 30 Jun 2020 03:51:34 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:34985 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728073AbgF3Hvd (ORCPT ); Tue, 30 Jun 2020 03:51:33 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-240-2NQ4wyHpMc6BIopA1a4Nxw-1; Tue, 30 Jun 2020 08:51:29 +0100 X-MC-Unique: 2NQ4wyHpMc6BIopA1a4Nxw-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 30 Jun 2020 08:51:29 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Tue, 30 Jun 2020 08:51:29 +0100 From: David Laight To: 'Linus Torvalds' , Christoph Hellwig CC: Al Viro , Luis Chamberlain , Kees Cook , Iurii Zaikin , "Linux Kernel Mailing List" , linux-fsdevel Subject: RE: [PATCH 03/11] fs: add new read_uptr and write_uptr file operations Thread-Topic: [PATCH 03/11] fs: add new read_uptr and write_uptr file operations Thread-Index: AQHWSlL8Fz5PlOyONku9ShNOCTqEYajsST7AgAOQcieAAPIagA== Date: Tue, 30 Jun 2020 07:51:29 +0000 Message-ID: <025de688a10d459489e8110a108fed43@AcuMS.aculab.com> References: <20200624162901.1814136-1-hch@lst.de> <20200624162901.1814136-4-hch@lst.de> <20200624175548.GA25939@lst.de> <20200629152912.GA26172@lst.de> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMjkgSnVuZSAyMDIwIDE4OjAzDQo+IE9uIE1v biwgSnVuIDI5LCAyMDIwIGF0IDg6MjkgQU0gQ2hyaXN0b3BoIEhlbGx3aWcgPGhjaEBsc3QuZGU+ IHdyb3RlOg0KPiA+DQo+ID4gU28gYmFzZWQgb24gdGhhdCBJJ2QgcmF0aGVyIGdldCBhd2F5IHdp dGhvdXQgb3VyIGZsYWcgYW5kIHRhZyB0aGUNCj4gPiBrZXJuZWwgcG9pbnRlciBjYXNlIGluIHNl dHNvY2tvcHQgZXhwbGljaXRseS4NCj4gDQo+IFllYWgsIEknZCBiZSBvayB0byBwYXNzIHRoYXQg a2luZCBvZiBmbGFnIGFyb3VuZCBmb3Igc2V0c29ja29wdCwgaW4NCj4gd2F5cyBJIF9kb24ndF8g d2FudCB0byBkbyBmb3Igc29tZSB2ZXJ5IGNvcmUgdmZzIHRoaW5nIGxpa2UgJ3JlYWQoKScuDQo+ IA0KPiBUaGF0IHNhaWQsIGlzIHRoZXJlIG5vIHByYWN0aWNhbCBsaW1pdCBvbiBob3cgYmlnICJv cHRsZW4iIGNhbiBiZT8NCj4gU3VyZSwgSSByZWFsaXplIHRoYXQgYSBsb3Qgb2Ygc2V0c29ja29w dCB1c2VycyBtYXkgbm90IHVzZSBhbGwgb2YgdGhlDQo+IGRhdGEsIGJ1dCBsZXQncyBzYXkgdGhh dCAib3B0bGVuIiBpcyAxMjgsIGJ1dCB0aGUgYWN0dWFsIGxvdy1sZXZlbA0KPiBzZXRzb2Nrb3B0 IG9wZXJhdGlvbiBvbmx5IHVzZXMgdGhlIGZpcnN0IDE2IGJ5dGVzLCBtYXliZSB3ZSBjb3VsZA0K PiBhbHdheXMganVzdCBjb3B5IHRoZSAxMjggYnl0ZXMgZnJvbSB1c2VyIHNwYWNlIGludG8ga2Vy bmVsIHNwYWNlLCBhbmQNCj4ganVzdCBzYXkgInNldHNvY2tvcHQoKSBhbHdheXMgZ2V0cyBhIGtl cm5lbCBwb2ludGVyIi4NCj4gDQo+IFRoZW4gdGhlIGJwZiB1c2UgaXMgZXZlbiBzaW1wbGVyLiBJ dCB3b3VsZCBqdXN0IHBhc3MgdGhlIGtlcm5lbA0KPiBwb2ludGVyIG5hdGl2ZWx5Lg0KPiANCj4g QmVjYXVzZSB0aGF0IHNlZW1zIHRvIGJlIHdoYXQgdGhlIEJQRiBjb2RlIHJlYWxseSB3YW50cyB0 byBkbzogaXQNCj4gdGFrZXMgdGhlIHVzZXIgb3B0dmFsLCBhbmQgbXVuZ2VzIGl0IGludG8gYSBr ZXJuZWwgb3B0dmFsLCBhbmQgdGhlbg0KPiAoaWYgdGhhdCBoYXMgYmVlbiBkb25lKSBydW5zIHRo ZSBsb3ctbGV2ZWwgc29ja19zZXRzb2Nrb3B0KCkgdW5kZXINCj4gS0VSTkVMX0RTLg0KPiANCj4g Q291bGRuJ3Qgd2Ugc3dpdGNoIHRoaW5ncyBhcm91bmQgaW5zdGVhZCwgYW5kIGp1c3QgKmFsd2F5 cyogY29weQ0KPiB0aGluZ3MgZnJvbSB1c2VyIHNwYWNlLCBhbmQgc29ja19zZXRzb2Nrb3B0IChh bmQNCj4gc29jay0+b3BzLT5zZXRzb2Nrb3B0KSBfYWx3YXlzXyBnZXQgYSBrZXJuZWwgYnVmZmVy Pw0KPiANCj4gQW5kIGF2b2lkIHRoZSBzZXRfZnMoS0VSTkVMX0RTKSBnYW1lcyBlbnRpcmVseSB0 aGF0IHdheT8NCg0KSSBkaWQgYSBwYXRjaCBmb3IgU0NUUCB0byBkbyB0aGUgY29waWVzIGluIHRo ZSBwcm90b2NvbCB3cmFwcGVyLg0KQXBhcnQgZnJvbSB0aGUgaXNzdWUgb2YgYmFkIGFwcGxpY2F0 aW9ucyBwcm92aWRpbmcgb3ZlcmxhcmdlDQpidWZmZXJzIGFuZCBlZmZlY3RpbmcgYSBsb2NhbCBE b1MgYXR0YWNrIHRoZXJlIHdlcmUgc29tZSBvZGQgaXNzdWVzOg0KDQoxKSBTQ1RQIGNvbXBsZXRl bHkgYWJ1c2VzIGJvdGggc2V0c29ja29wdCBhbmQgZ2V0c29ja29wdA0KICAgdG8gcGVyZm9ybSBh ZGRpdGlvbmFsIHNvY2tldCBvcGVyYXRpb25zLg0KICAgSSBzdXNwZWN0IHRoZSBvcmlnaW5hbCBp bXBsZW1lbnRhdGlvbiBkaWRuJ3Qgd2FudCB0bw0KICAgYWRkIG5ldyBzeXN0ZW0gY2FsbHMuDQoy KSBTQ1RQIHRyZWF0cyBnZXRzb2Nrb3B0IGFzIFJNVyBvbiB0aGUgdXNlciBidWZmZXIuDQogICBN b3N0bHkgaXQgb25seSBuZWVkcyA0IGJ5dGVzLCBidXQgaXQgY2FuIGluIGluY2x1ZGUNCiAgIGEg c29ja2FkZHJfc3RvcmFnZS4NCjMpIFNDVFAgaGFzIG9uZSBnZXRzb2Nrb3B0IHRoYXQgaXMgcmVh bGx5IGEgc2V0c29ja29wdA0KICAgKGllIGNoYW5nZXMgdGhpbmdzKSBidXQgaXMgaW1wbGVtZW50 ZWQgdXNpbmcgZ2V0c29ja29wdA0KICAgc28gdGhhdCBpdCBjYW4gcmV0dXJuIGEgdmFsdWUuDQo0 KSBPbmUgb2YgdGhlIFNDVFAgZ2V0c29ja29wdCBjYWxscyBoYXMgdG8gcmV0dXJuIHRoZQ0KICAg J3dyb25nJyB2YWx1ZSB0byB1c2Vyc3BhY2UgKGllIG5vdCB0aGUgbGVuZ3RoIG9mIHRoZQ0KICAg dHJhbnNmZXJyZWQgZGF0YSkgZm9yIGNvbXBhdGliaWxpdHkgd2l0aCB0aGUgb3JnaW5hbA0KICAg YnJva2VuIGNvZGUuDQoNCkknbSB3b25kZXJpbmcgaWYgdGhlIFtzZ11ldHNvY2tvcHQgd3JhcHBl ciBzaG91bGQgYWN0dWFsbHkNCnBhc3MgdGhyb3VnaCBhIHN0cnVjdHVyZSBjb250YWluaW5nOg0K CUtlcm5lbCBidWZmZXIgYWRkcmVzcyAob24gc3RhY2sgaWYgc2hvcnQpDQoJVXNlciBidWZmZXIg YWRkcmVzcyAobWF5IGJlIE5VTEwpDQoJTGVuZ3RoIG9mIGJ1ZmZlcg0KCWNvcHlfdG9fdXNlciBs ZW5ndGggKG5vcm1hbGx5IHplcm8pDQoJZmxhZzogZW1iZWRkZWQgcG9pbnRlcnMgYXJlIHVzZXIv a2VybmVsDQoNCk1vc3QgY29kZSB3aWxsIGp1c3QgdXNlIHRoZSBrZXJuZWwgYnVmZmVyIGFuZCBy ZXR1cm4gbGVuZ3RoL2Vycm9yLg0KDQpDb2RlIHRoYXQga25vd3MgdGhlIHN1cHBsaWVkIGxlbmd0 aCBpcyBpbnZhbGlkIGNhbiB1c2UgdGhlDQp1c2VyIHBvaW50ZXIgLSBidXQgb25seSBzdXBwb3J0 IGRpcmVjdCB1c2VyIHJlcXVlc3RzLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNz IExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAx UFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K