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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A8E5C433EF for ; Fri, 6 May 2022 08:09:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1389822AbiEFINf (ORCPT ); Fri, 6 May 2022 04:13:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239540AbiEFINe (ORCPT ); Fri, 6 May 2022 04:13:34 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C22CA674F2 for ; Fri, 6 May 2022 01:09:48 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-250-24u7aDa_PwiQf3uhDwIDfw-1; Fri, 06 May 2022 09:09:45 +0100 X-MC-Unique: 24u7aDa_PwiQf3uhDwIDfw-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Fri, 6 May 2022 09:09:44 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.033; Fri, 6 May 2022 09:09:44 +0100 From: David Laight To: 'Maxim Mikityanskiy' CC: Jakub Kicinski , "David S. Miller" , Daniel Borkmann , Paolo Abeni , Boris Pismenny , Tariq Toukan , "Saeed Mahameed" , Gal Pressman , "netdev@vger.kernel.org" Subject: RE: [PATCH net-next] tls: Add opt-in zerocopy mode of sendfile() Thread-Topic: [PATCH net-next] tls: Add opt-in zerocopy mode of sendfile() Thread-Index: AQHYXx+Xq0V3mdE7TkGKm+YxYaezY60OeVSwgAGyMICAACK8UIAAPk4AgADxqjA= Date: Fri, 6 May 2022 08:09:44 +0000 Message-ID: <1f45be856eae43a5bca0af524f5b02b9@AcuMS.aculab.com> References: <20220427175048.225235-1-maximmi@nvidia.com> <20220428151142.3f0ccd83@kernel.org> <20220429121117.21bf7490@kernel.org> <3f5f17a11d294781a5e500b3903aa902@AcuMS.aculab.com> <41abbf9f-8719-f2a7-36b5-fd6835bb133d@nvidia.com> <5dba0c54c647491a85366834c8c1c7d1@AcuMS.aculab.com> In-Reply-To: Accept-Language: en-GB, 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-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org RnJvbTogTWF4aW0gTWlraXR5YW5za2l5DQo+IFNlbnQ6IDA1IE1heSAyMDIyIDE5OjI4DQo+IA0K PiBPbiAyMDIyLTA1LTA1IDE2OjQ4LCBEYXZpZCBMYWlnaHQgd3JvdGU6DQo+ID4gRnJvbTogTWF4 aW0gTWlraXR5YW5za2l5DQo+ID4+IFNlbnQ6IDA1IE1heSAyMDIyIDEzOjQwDQo+ID4+DQo+ID4+ IE9uIDIwMjItMDUtMDQgMTI6NDksIERhdmlkIExhaWdodCB3cm90ZToNCj4gPj4+Pj4gSWYgeW91 IGRlY2xhcmUgdGhlIHVuaW9uIG9uIHRoZSBzdGFjayBpbiB0aGUgY2FsbGVycywgYW5kIHBhc3Mg YnkgdmFsdWUNCj4gPj4+Pj4gLSBpcyB0aGUgY29tcGlsZXIgbm90IGdvaW5nIHRvIGJlIGNsZXZl ciBlbm91Z2ggdG8gc3RpbGwgRERSVD8NCj4gPj4+Pg0KPiA+Pj4+IEFoLCBPSywgaXQgc2hvdWxk IGRvIHRoZSB0aGluZy4gSSB0aG91Z2h0IHlvdSB3YW50ZWQgbWUgdG8gZGl0Y2ggdGhlDQo+ID4+ Pj4gdW5pb24gYWx0b2dldGhlci4NCj4gPj4+DQo+ID4+PiBTb21lIGFyY2hpdGVjdHVyZXMgYWx3 YXlzIHBhc3Mgc3RydWN0L3VuaW9uIGJ5IGFkZHJlc3MuDQo+ID4+PiBXaGljaCBpcyBwcm9iYWJs eSBub3Qgd2hhdCB5b3UgaGFkIGluIG1pbmQuDQo+ID4+DQo+ID4+IERvIHlvdSBoYXZlIGFueSBz cGVjaWZpYyBhcmNoaXRlY3R1cmUgaW4gbWluZD8gSSBjb3VsZG4ndCBmaW5kIGFueQ0KPiA+PiBp bmZvcm1hdGlvbiB0aGF0IGl0IGhhcHBlbnMgYW55d2hlcmUsIHg4Nl82NCBBQkkgWzFdIChwYWdl cyAyMC0yMSkNCj4gPj4gYWxpZ25zIHdpdGggbXkgZXhwZWN0YXRpb25zLCBhbmQgbXkgY29tbW9u IHNlbnNlIGNhbid0IGV4cGxhaW4gd2h5IHdvdWxkDQo+ID4+IHNvbWUgYXJjaGl0ZWN0dXJlcyBk byB3aGF0IHlvdSBzYXkuDQo+ID4+DQo+ID4+IEluIEMsIHdoZW4gdGhlIGNhbGxlciBwYXNzZXMg YSBzdHJ1Y3QgYXMgYSBwYXJhbWV0ZXIsIHRoZSBjYWxsZWUgY2FuDQo+ID4+IGZyZWVseSBtb2Rp ZnkgaXQuIElmIHRoZSBjb21waWxlciBzaWxlbnRseSByZXBsYWNlZCBpdCB3aXRoIGEgcG9pbnRl ciwNCj4gPj4gdGhlIGNhbGxlZSB3b3VsZCBjb3JydXB0IHRoZSBjYWxsZXIncyBsb2NhbCB2YXJp YWJsZSwgc28gc3VjaCBhcHByb2FjaA0KPiA+PiByZXF1aXJlcyB0aGUgY2FsbGVyIHRvIG1ha2Ug YW4gZXh0cmEgY29weS4NCj4gPg0KPiA+IFllcywgdGhhdCBpcyB3aGF0IGhhcHBlbnMuDQo+IA0K PiBJIGRpZCBhIHF1aWNrIGV4cGVyaW1lbnQgd2l0aCBnY2MgOSBvbiBtNjhrIGFuZCBpMzg2LCBh bmQgaXQgZG9lc24ndA0KPiBjb25maXJtIHdoYXQgeW91IGNsYWltLg0KPiANCj4gI2luY2x1ZGUg PHN0ZGludC5oPg0KPiAjaW5jbHVkZSA8c3RkaW8uaD4NCj4gDQo+IHVuaW9uIHRlc3Qgew0KPiAg ICAgICAgICB1aW50MzJfdCB4Ow0KPiAgICAgICAgICB1aW50MzJfdCAqeTsNCj4gfTsNCj4gDQo+ IHZvaWQgZnVuYzEodm9pZCAqcHRyLCB1bmlvbiB0ZXN0IHQpDQo+IHsNCj4gICAgICAgICAgaWYg KHB0cikgew0KPiAgICAgICAgICAgICAgICAgIHByaW50ZigiJXAgJXVcbiIsIHB0ciwgdC54KTsN Cj4gICAgICAgICAgfSBlbHNlIHsNCj4gICAgICAgICAgICAgICAgICBwcmludGYoIiV1XG4iLCAq dC55KTsNCj4gICAgICAgICAgfQ0KPiB9DQo+IA0KPiB2b2lkIGZ1bmMyKHZvaWQgKnB0ciwgdWlu dDMyX3QgKnkpDQo+IHsNCj4gICAgICAgICAgaWYgKHB0cikgew0KPiAgICAgICAgICAgICAgICAg IHByaW50ZigiJXAgJXVcbiIsIHB0ciwgKHVpbnQzMl90KXkpOw0KPiAgICAgICAgICB9IGVsc2Ug ew0KPiAgICAgICAgICAgICAgICAgIHByaW50ZigiJXVcbiIsICp5KTsNCj4gICAgICAgICAgfQ0K PiB9DQo+IA0KPiBnY2MgLVMgdGVzdC5jIC1mbm8tc3RyaWN0LWFsaWFzaW5nIC1vIC0NCj4gDQo+ IEkgYmVsaWV2ZSB0aGlzIG1pbmltYWwgZXhhbXBsZSByZWZsZWN0cyB3ZWxsIGVub3VnaCB3aGF0 IGhhcHBlbnMgaW4gbXkNCj4gY29kZS4gVGhlIGFzc2VtYmx5IGdlbmVyYXRlZCBmb3IgZnVuYzEg YW5kIGZ1bmMyIGFyZSBpZGVudGljYWwuIEluIGJvdGgNCj4gY2FzZXMgdGhlIHNlY29uZCBwYXJh bWV0ZXIgaXMgcGFzc2VkIG9uIHRoZSBzdGFjayBieSB2YWx1ZSwgbm90IGJ5IHBvaW50ZXIuDQoN CkhtbW0sIHBlcmhhcHMgaXQgaXMvd2FzIG9ubHkgc3BhcmMzMiB0aGF0IHBhc3NlZCBhbGwgc3Ry dWN0dXJlcyBieSByZWZlcmVuY2UuDQpnb2Rib2x0IGRvZXNuJ3Qgc2VlbSB0byBoYXZlIGEgc3Bh cmMgY29tcGlsZXIgYW5kIEkgZG9uJ3QgaGF2ZSBhDQp3b3JraW5nIHNwYXJjIHN5c3RlbSBhbnkg bW9yZS4NCg0KSXQgaXMgYWxzbyBwb3NzaWJsZSB0aGF0IHRoZSBjYWxsaW5nIGNvbnZlbnRpb25z IGFyZSBzbGlnaHRseQ0KZGlmZmVyZW50IHRoYW4gdGhlIG9uZXMgSSByZW1lbWJlciB1c2luZyB5 ZWFycyBhZ28uDQoNCkNlcnRhaW5seSBvbiBpMzg2IGV2ZW4gNCBieXRlIHN0cnVjdHVyZXMgYXJl IHJldHVybmVkIGJ5IHJlZmVyZW5jZS4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVz cyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEg MVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==