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=-4.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 E1C01C433E5 for ; Mon, 20 Jul 2020 08:25:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C764A20709 for ; Mon, 20 Jul 2020 08:25:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726862AbgGTIZ0 (ORCPT ); Mon, 20 Jul 2020 04:25:26 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:31045 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725815AbgGTIZZ (ORCPT ); Mon, 20 Jul 2020 04:25:25 -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-164-bY_3e_EDMPW4iKQxeTBP4A-1; Mon, 20 Jul 2020 09:25:20 +0100 X-MC-Unique: bY_3e_EDMPW4iKQxeTBP4A-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; Mon, 20 Jul 2020 09:25:19 +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; Mon, 20 Jul 2020 09:25:19 +0100 From: David Laight To: 'Alexei Starovoitov' , Christoph Hellwig CC: Stanislav Fomichev , Alexei Starovoitov , "David S. Miller" , Network Development , bpf Subject: RE: how is the bpfilter sockopt processing supposed to work Thread-Topic: how is the bpfilter sockopt processing supposed to work Thread-Index: AQHWXF/F35kHqURKlkeKKxLFQfLuxakQImUw Date: Mon, 20 Jul 2020 08:25:19 +0000 Message-ID: <2120c0cd6da143619ed54809c768c22e@AcuMS.aculab.com> References: <20200717055245.GA9577@lst.de> <20200717162526.GA17072@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 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org RnJvbTogQWxleGVpIFN0YXJvdm9pdG92DQo+IFNlbnQ6IDE3IEp1bHkgMjAyMCAxODoyOQ0KPiBP biBGcmksIEp1bCAxNywgMjAyMCBhdCA5OjI1IEFNIENocmlzdG9waCBIZWxsd2lnIDxoY2hAbHN0 LmRlPiB3cm90ZToNCj4gPg0KPiA+IE9uIEZyaSwgSnVsIDE3LCAyMDIwIGF0IDA5OjEzOjA3QU0g LTA3MDAsIEFsZXhlaSBTdGFyb3ZvaXRvdiB3cm90ZToNCj4gPiA+IE9uIFRodSwgSnVsIDE2LCAy MDIwIGF0IDEwOjUyIFBNIENocmlzdG9waCBIZWxsd2lnIDxoY2hAbHN0LmRlPiB3cm90ZToNCj4g PiA+ID4NCj4gPiA+ID4gSGkgQWxleGVpLA0KPiA+ID4gPg0KPiA+ID4gPiBJJ3ZlIGp1c3QgYmVl biBhdWRpdGluZyB0aGUgc29ja29wdCBjb2RlLCBhbmQgYnBmaWx0ZXIgbG9va3MgcmVhbGx5DQo+ ID4gPiA+IG9kZC4gIEJvdGggZ2V0c29ja29wdHMgYW5kIHNldHNvY2tvcHQgZXZlbnR1YWxseSBl bmQgdXANCj4gPiA+ID4gaW5fX2JwZmlsdGVyX3Byb2Nlc3Nfc29ja29wdCwgd2hpY2ggdGhlbiBw YXNzZXMgcmVjb3JkIHRvIHRoZQ0KPiA+ID4gPiB1c2Vyc3BhY2UgaGVscGVyIGNvbnRhaW5pbmcg dGhlIGFkZHJlc3Mgb2YgdGhlIG9wdHZhbCBidWZmZXIuDQo+ID4gPiA+IFdoaWNoIGRlcGVuZGlu ZyBvbiBicGYtY2dyb3VwIG1pZ2h0IGJlIGluIHVzZXIgb3Iga2VybmVsIHNwYWNlLg0KPiA+ID4g PiBCdXQgZXZlbiBpZiBpdCBpcyBpbiB1c2Vyc3BhY2UgaXQgd291bGQgYmUgaW4gYSBkaWZmZXJl bnQgcHJvY2Vzcw0KPiA+ID4gPiB0aGFuIHRoZSBicGZpbGVyIGhlbHBlci4gIFdoYXQgbWFrZXMg YWxsIHRoaXMgd29yaz8NCj4gPiA+DQo+ID4gPiBIbW0uIEdvb2QgcG9pbnQuIGJwZmlsdGVyIGFz c3VtZXMgdXNlciBhZGRyZXNzZXMuIEl0IHdpbGwgYnJlYWsNCj4gPiA+IGlmIGJwZiBjZ3JvdXAg c29ja29wdCBtZXNzZXMgd2l0aCBpdC4NCj4gPiA+IFdlIGhhZCBhIGRpZmZlcmVudCBpc3N1ZSB3 aXRoIGJwZi1jZ3JvdXAtc29ja29wdCBhbmQgaXB0YWJsZXMgaW4gdGhlIHBhc3QuDQo+ID4gPiBQ cm9iYWJseSB0aGUgZWFzaWVzdCB3YXkgZm9yd2FyZCBpcyB0byBzcGVjaWFsIGNhc2UgdGhpcyBw YXJ0aWN1bGFyIG9uZS4NCj4gPiA+IFdpdGggeW91ciBuZXcgc2VyaWVzIGlzIHRoZXJlIGEgd2F5 IHRvIHRlbGwgaW4gYnBmaWx0ZXJfaXBfZ2V0X3NvY2tvcHQoKQ0KPiA+ID4gd2hldGhlciBhZGRy IGlzIGtlcm5lbCBvciB1c2VyPyBBbmQgaWYgaXQncyB0aGUga2VybmVsIGp1c3QgcmV0dXJuIHdp dGggZXJyb3IuDQo+ID4NCj4gPiBZZXMsIEkgY2FuIHNlbmQgYSBmaXguICBCdXQgaG93IGRvIGV2 ZW4gdGhlIHVzZXIgc3BhY2UgYWRkcmVzc2VkIHdvcms/DQo+ID4gSWYgc29tZSByYW5kb20gcHJv Y2VzcyBjYWxscyBnZXRzb2Nrb3B0IG9yIHNldHNvY2tvcHQsIGhvdyBkb2VzIHRoZQ0KPiA+IGJw ZmlsdGVyIHVzZXIgbW9kZSBoZWxwZXIgYXR0YWNoIHRvIGl0cyBhZGRyZXNzIHNwYWNlPw0KPiAN Cj4gVGhlIGFjdHVhbCBicGZpbHRlciBwcm9jZXNzaW5nIGlzIGluIHR3byBwYXRjaGVzIHRoYXQg d2UgZGlkbid0IGxhbmQ6DQo+IGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL3BhdGNod29yay9wYXRj aC85MDI3ODUvDQo+IGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL3BhdGNod29yay9wYXRjaC85MDI3 ODMvDQo+IFVNRCBpcyB1c2luZyBwcm9jZXNzX3ZtX3JlYWR2KCkuDQo+IFRoZSB0YXJnZXQgcHJv Y2VzcyBpcyB3YWl0aW5nIGZvciB0aGUgc29ja29wdCBzeXNjYWxsIHRvIHJldHVybiwNCj4gc28g ZnJvbSB0aGUgdG9jdG91IHBlcnNwZWN0aXZlIGl0J3MgdGhlIHNhbWUgYXMgdGhlIGtlcm5lbCBk b2luZyBjb3B5X2Zyb21fdXNlci4NCg0KWW91IG5lZWQgdG8gYmUgZG9pbmcgdGhlIHVzZXItc3Bh Y2VzIGFjY2Vzc2VzIGZyb20gdGhlIHRhcmdldCBwcm9jZXNzJ3MNCmNvbnRleHQuDQpJZiBpdCBp cyB3YWl0aW5nIGZvciB0aGUgc3lzY2FsbCB0byByZXR1cm4gdGhlbiB5b3UgYXJlbid0IHJ1bm5p bmcNCml0IGl0cyBjb250ZXh0Lg0KDQpUaGVyZSBpcyBhbHNvIGF0IGxlYXN0IG9uZSBzb2Nrb3B0 IHRoYXQgaGFzIGFuIGVtYmVkZGVkIHBvaW50ZXIuDQpTbyBldmVuIGlmIHlvdSd2ZSBjb3BpZWQg dGhlIHNvY2tvcHQgYnVmZmVyIGludG8ga2VybmVsIHNwYWNlDQp5b3UgYXJlIGRvb21lZC4NCklm IHRoZSByZXF1ZXN0IGhhcyBjb21lIGZyb20gYSBrZXJuZWwgdGhyZWFkIHdpdGgga2VybmVsIGJ1 ZmZlcnMNCnRoZW4gdGhlIGVtYmVkZGVkIGJ1ZmZlciB3aWxsIGJlIGtlcm5lbC4NCihUaGlzIGlz IHByb2JhYmx5IG1vcmUgY29tbW9uIGZvciBpb2N0bCgpIHJlcXVlc3RzLikNCg0KSSdtIG5vdCBz dXJlIHRoZXJlIGlzIGFueSBzYW5lIHdhcyB0byBoYW5kbGUgdGhpcy4NCg0KCURhdmlkDQoNCi0N ClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBN aWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxl cykNCg==