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 A13B6C4332F for ; Thu, 5 May 2022 08:22:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347057AbiEEI01 (ORCPT ); Thu, 5 May 2022 04:26:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35916 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349549AbiEEI0A (ORCPT ); Thu, 5 May 2022 04:26:00 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 830424553A; Thu, 5 May 2022 01:21:18 -0700 (PDT) Received: from dggpeml500026.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4Kv67v667Pz1JBrY; Thu, 5 May 2022 16:20:11 +0800 (CST) Received: from dggpeml500026.china.huawei.com (7.185.36.106) by dggpeml500026.china.huawei.com (7.185.36.106) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 5 May 2022 16:21:15 +0800 Received: from dggpeml500026.china.huawei.com ([7.185.36.106]) by dggpeml500026.china.huawei.com ([7.185.36.106]) with mapi id 15.01.2375.024; Thu, 5 May 2022 16:21:15 +0800 From: shaozhengchao To: =?utf-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "bpf@vger.kernel.org" , "davem@davemloft.net" , "edumazet@google.com" , "kuba@kernel.org" , "pabeni@redhat.com" CC: "ast@kernel.org" , "daniel@iogearbox.net" , "hawk@kernel.org" , "john.fastabend@gmail.com" , "andrii@kernel.org" , "kafai@fb.com" , "songliubraving@fb.com" , "yhs@fb.com" , "kpsingh@kernel.org" , "bigeasy@linutronix.de" , "imagedong@tencent.com" , "petrm@nvidia.com" , "memxor@gmail.com" , "arnd@arndb.de" , "weiyongjun (A)" , yuehaibing Subject: =?utf-8?B?562U5aSNOiBbUEFUQ0ggYnBmLW5leHRdIGJwZi94ZHA6IENhbid0IGRldGFj?= =?utf-8?Q?h_BPF_XDP_prog_if_not_exist?= Thread-Topic: [PATCH bpf-next] bpf/xdp: Can't detach BPF XDP prog if not exist Thread-Index: AQHYX2op2bNaMdSDska3w9BA56i4160ODMuAgAHk8MA= Date: Thu, 5 May 2022 08:21:15 +0000 Message-ID: <594b5198d54c4c729728c20d167d9c2d@huawei.com> References: <20220504035207.98221-1-shaozhengchao@huawei.com> <875ymlwnmy.fsf@toke.dk> In-Reply-To: <875ymlwnmy.fsf@toke.dk> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.174.178.66] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org DQotLS0tLemCruS7tuWOn+S7ti0tLS0tDQrlj5Hku7bkuro6IFRva2UgSMO4aWxhbmQtSsO4cmdl bnNlbiBbbWFpbHRvOnRva2VAcmVkaGF0LmNvbV0gDQrlj5HpgIHml7bpl7Q6IDIwMjLlubQ15pyI NOaXpSAxOToyMA0K5pS25Lu25Lq6OiBzaGFvemhlbmdjaGFvIDxzaGFvemhlbmdjaGFvQGh1YXdl aS5jb20+OyBuZXRkZXZAdmdlci5rZXJuZWwub3JnOyBsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwu b3JnOyBicGZAdmdlci5rZXJuZWwub3JnOyBkYXZlbUBkYXZlbWxvZnQubmV0OyBlZHVtYXpldEBn b29nbGUuY29tOyBrdWJhQGtlcm5lbC5vcmc7IHBhYmVuaUByZWRoYXQuY29tDQrmioTpgIE6IGFz dEBrZXJuZWwub3JnOyBkYW5pZWxAaW9nZWFyYm94Lm5ldDsgaGF3a0BrZXJuZWwub3JnOyBqb2hu LmZhc3RhYmVuZEBnbWFpbC5jb207IGFuZHJpaUBrZXJuZWwub3JnOyBrYWZhaUBmYi5jb207IHNv bmdsaXVicmF2aW5nQGZiLmNvbTsgeWhzQGZiLmNvbTsga3BzaW5naEBrZXJuZWwub3JnOyBiaWdl YXN5QGxpbnV0cm9uaXguZGU7IGltYWdlZG9uZ0B0ZW5jZW50LmNvbTsgcGV0cm1AbnZpZGlhLmNv bTsgbWVteG9yQGdtYWlsLmNvbTsgYXJuZEBhcm5kYi5kZTsgd2VpeW9uZ2p1biAoQSkgPHdlaXlv bmdqdW4xQGh1YXdlaS5jb20+OyBzaGFvemhlbmdjaGFvIDxzaGFvemhlbmdjaGFvQGh1YXdlaS5j b20+OyB5dWVoYWliaW5nIDx5dWVoYWliaW5nQGh1YXdlaS5jb20+DQrkuLvpopg6IFJlOiBbUEFU Q0ggYnBmLW5leHRdIGJwZi94ZHA6IENhbid0IGRldGFjaCBCUEYgWERQIHByb2cgaWYgbm90IGV4 aXN0DQoNClpoZW5nY2hhbyBTaGFvIDxzaGFvemhlbmdjaGFvQGh1YXdlaS5jb20+IHdyaXRlczoN Cg0KPiBpZiB1c2VyIHNldHMgbm9uZXhpc3RlbnQgeGRwX2ZsYWdzIHRvIGRldGFjaCB4ZHAgcHJv Zywga2VybmVsIHNob3VsZCANCj4gcmV0dXJuIGVyciBhbmQgdGVsbCB1c2VyIHRoYXQgZGV0YWNo IGZhaWxlZCB3aXRoIGRldGFpbCBpbmZvLg0KPg0KPiBTaWduZWQtb2ZmLWJ5OiBaaGVuZ2NoYW8g U2hhbyA8c2hhb3poZW5nY2hhb0BodWF3ZWkuY29tPg0KDQpJIGtpbmRhIHNlZSB5b3VyIHBvaW50 LCBidXQgdGhpcyB3aWxsIGNoYW5nZSB1c2VyLXZpc2libGUgYmVoYXZpb3VyIHRoYXQgYXBwbGlj YXRpb25zIG1pZ2h0IGJlIHJlbHlpbmcgb24sIHNvIEkgZG9uJ3QgdGhpbmsgd2UgY2FuIG1ha2Ug dGhpcyBjaGFuZ2UgYXQgdGhpcyBzdGFnZS4gV2h5IGNhbid0IHlvdXIgYXBwbGljYXRpb24ganVz dCBxdWVyeSB0aGUgbGluayBmb3Igd2hldGhlciBhIHByb2dyYW0gaXMgYXR0YWNoZWQ/DQoNCi1U b2tlDQoNCg0KVGhhbmsgeW91IGZvciB5b3VyIHJlcGx5LiBJIHdpaWwgY2hhbmdlIHNhbXBsZSBh cHBsaWNhdGlvbiBmaXJzdGx5LiBCdXQgaWYga2VybmVsIGRvZXMgbm90aGluZyBhbmQgcmV0dXJu IDAsIG1heWJlIHVzZXIgd2lsbCB0aGluayBzZXR1cCBpcyBPSywgYWN0dWFsbHkgSXQgZmFpbGVk LiBJcyB0aGlzIGFjY2VwdGFibGU/DQo=