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=-3.8 required=3.0 tests=BAYES_00, 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 31606C433ED for ; Mon, 17 May 2021 12:50:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1111A6105A for ; Mon, 17 May 2021 12:50:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237147AbhEQMv4 (ORCPT ); Mon, 17 May 2021 08:51:56 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:48895 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234579AbhEQMvw (ORCPT ); Mon, 17 May 2021 08:51:52 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-149-wut8-mPqOHOv3M2Sd2gB7Q-1; Mon, 17 May 2021 13:50:33 +0100 X-MC-Unique: wut8-mPqOHOv3M2Sd2gB7Q-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 15.0.1497.2; Mon, 17 May 2021 13:50:30 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.015; Mon, 17 May 2021 13:50:30 +0100 From: David Laight To: 'Neal Cardwell' , louisrossberg CC: "linux-kernel@vger.kernel.org" , Netdev Subject: RE: Listening on a TCP socket from a Kernel Module Thread-Topic: Listening on a TCP socket from a Kernel Module Thread-Index: AQHXSr+3GMYNZUgdCkOEAPNeLW2sIqrnnyqg Date: Mon, 17 May 2021 12:50:30 +0000 Message-ID: <576922badb254ef0a73443a7752ba9c8@AcuMS.aculab.com> References: <5J_z4QNPMBAk4y0rGshI7mBykT1tivh3037CbQRYXTu_Ra6zuojEcI0RB04ghXQxgdtDbt3YFv6sA882mrFyTdzQePwHwvLoECnqFTnYNZI=@protonmail.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: linux-kernel@vger.kernel.org RnJvbTogTmVhbCBDYXJkd2VsbA0KPiBTZW50OiAxNyBNYXkgMjAyMSAwMjo1NQ0KPiANCj4gT24g U3VuLCBNYXkgMTYsIDIwMjEgYXQgNzoyMCBQTSBsb3Vpc3Jvc3NiZXJnDQo+IDxsb3Vpc3Jvc3Ni ZXJnQHByb3Rvbm1haWwuY29tPiB3cm90ZToNCj4gPg0KPiA+IEhlbGxvLCBjYW4gc29tZWJvZHkg cG9pbnQgbWUgaW4gdGhlIHJpZ2h0IGRpcmVjdGlvbiBmb3INCj4gPiB3aGF0IEkgd291bGQgdXNl IHRvIGxpc3RlbiBvbiBhIFRDUCBzb2NrZXQgZnJvbSB0aGUNCj4gPiBrZXJuZWw/IEkgYW0gd29y a2luZyBvbiBhIGtlcm5lbCBtb2R1bGUgYW5kIGhhdmUgc3BlbnQgdGhlDQo+ID4gcGFzdCBkYXkg bG9va2luZyB0aHJvdWdoIGluY2x1ZGUvbmV0IGFuZCBpbmNsdWRlL2xpbnV4IGZvcg0KPiA+IHNv bWV0aGluZyB0aGF0IHdvdWxkIGFsbG93IG1lIHRvIGRvIHNvLiBJIGtub3cgVENQDQo+ID4gbGlz dGVuaW5nIGlzIHR5cGljYWxseSBkb25lIGluIHVzZXJzcGFjZSwgYnV0IGl0IHNob3VsZCBiZQ0K PiA+IHBvc3NpYmxlIGF0IHRoZSBrZXJuZWwgbGV2ZWwgcmlnaHQ/ICB0Y3BfZGlhZyBsb29rcw0K PiA+IHByb21pc2luZywgYnV0IGl0IHNlZW1zIGxpa2UgdGhhdCBpcyBtYWlubHkgZm9yIG1vbml0 b3JpbmcNCj4gPiBzb2NrZXRzLCBhbmQgSSdtIG5vdCBzdXJlIGlmIEkgd291bGQgYmUgYWJsZSB0 byBwcm92aWRlDQo+ID4gcmVzcG9uc2VzIGZyb20gaXQuDQo+ID4NCj4gPiBMb3VpcyBSb3NzYmVy ZywNCj4gPiBXYXJwZWQgVGVjaG5vbG9naWVzDQo+IA0KPiBQZXJoYXBzIGtlcm5lbF9saXN0ZW4o KSBhbmQgcmVsYXRlZCBmdW5jdGlvbnMgKGtlcm5lbF9iaW5kKCksDQo+IGtlcm5lbF9hY2NlcHQo KSwgZXRjLikgaW4gbmV0L3NvY2tldC5jIG1pZ2h0IGRvIHRoZSB0cmljayBmb3IgeW91ciB1c2UN Cj4gY2FzZT8gTG9va2luZyBhdCBob3cgdGhlIGNhbGxlcnMgb2YgdGhlc2UgZnVuY3Rpb25zIHN0 cnVjdHVyZSB0aGVpcg0KPiBjb2RlIG1pZ2h0IGdpdmUgeW91IGVub3VnaCB0byBnbyBvbi4NCg0K VGhleSBzaG91bGQgd29yay4NClRoZXJlIGFyZSBhIGNvdXBsZSBvZiBpc3N1ZXMgdGhvdWdoOg0K LSBUaGVyZSBpcyBubyBnZXRzb2Nrb3B0KCkgc3VwcG9ydCBpbiBjdXJyZW50IGtlcm5lbHMuDQot IFlvdSBtYXkgbmVlZCB0byB1c2UgX19zb2NrX2NyZWF0ZSgpIHJhdGhlciB0aGFuIHNvY2tfY3Jl YXRlX2tlcm4oKQ0KICBpbiBvcmRlciB0byBob2xkIGEgcmVmZXJlbmNlIHRvIHRoZSBuZXR3b3Jr IG5hbWVzcGFjZS4NCkl0IG1heSBiZSBwb3NzaWJsZSB0byB1c2UgdGhlIHdha2V1cCBjYWxsYmFj a3MgdGhhdCBzZWxlY3QvcG9sbCB1c2UuDQpCdXQgaXQgaXMgcHJvYmFibHkgc2FmZXIgdG8gdXNl IGJsb2NraW5nIG9wZXJhdGlvbnMgZnJvbSBhIHNlcGFyYXRlDQprZXJuZWwgdGhyZWFkLg0KDQoJ RGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1v dW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEz OTczODYgKFdhbGVzKQ0K