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 mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by smtp.lore.kernel.org (Postfix) with ESMTP id 767AAC43458 for ; Wed, 1 Jul 2026 08:22:17 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 9CDA5402E0; Wed, 1 Jul 2026 10:22:16 +0200 (CEST) Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by mails.dpdk.org (Postfix) with ESMTP id DAB8040278 for ; Wed, 1 Jul 2026 10:22:15 +0200 (CEST) Received: from mail.maildlp.com (unknown [172.18.224.107]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4gqtJm2mwtzHnGjg; Wed, 1 Jul 2026 16:21:28 +0800 (CST) Received: from dubpeml500002.china.huawei.com (unknown [7.214.145.83]) by mail.maildlp.com (Postfix) with ESMTPS id 3B68A4058D; Wed, 1 Jul 2026 16:22:14 +0800 (CST) Received: from dubpeml500001.china.huawei.com (7.214.147.241) by dubpeml500002.china.huawei.com (7.214.145.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 1 Jul 2026 09:22:13 +0100 Received: from dubpeml500001.china.huawei.com ([7.214.147.241]) by dubpeml500001.china.huawei.com ([7.214.147.241]) with mapi id 15.02.1544.011; Wed, 1 Jul 2026 09:22:13 +0100 From: Konstantin Ananyev To: Stephen Hemminger , "dev@dpdk.org" Subject: RE: [PATCH v2 8/8] doc: add release note about ip_frag changes Thread-Topic: [PATCH v2 8/8] doc: add release note about ip_frag changes Thread-Index: AQHdCKZ9eNxHI/x6WkyztoP/EaJUf7ZYUbDA Date: Wed, 1 Jul 2026 08:22:13 +0000 Message-ID: References: <20260616210656.464062-1-stephen@networkplumber.org> <20260630153723.525167-1-stephen@networkplumber.org> <20260630153723.525167-9-stephen@networkplumber.org> In-Reply-To: <20260630153723.525167-9-stephen@networkplumber.org> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.45.146.116] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org > The changes to ip_frag might impact some conformance or > performance tests. >=20 > Signed-off-by: Stephen Hemminger > --- > doc/guides/rel_notes/release_26_07.rst | 6 ++++++ > 1 file changed, 6 insertions(+) >=20 > diff --git a/doc/guides/rel_notes/release_26_07.rst > b/doc/guides/rel_notes/release_26_07.rst > index 4ca0a9ac77..a419803401 100644 > --- a/doc/guides/rel_notes/release_26_07.rst > +++ b/doc/guides/rel_notes/release_26_07.rst > @@ -241,6 +241,12 @@ API Changes > - ``rte_pmd_mlx5_enable_steering`` > - ``rte_pmd_mlx5_disable_steering`` >=20 > +* **ip_frag: hardened IP reassembly against malformed fragments.** > + > + Duplicate, overlapping, oversized, and (for IPv6) per-fragment-header > + fragments are now rejected rather than mis-reassembled. This changes w= hich > + fragment streams reassemble and may affect throughput. That doesn't look entirely correct: Current implementation doesn't allow both duplicate or overlapping fragment= s either, though it postpones it's detection till reassembly stage. Might be something like that: **ip_frag: hardened IP reassembly against malformed fragments.** * Tolerate packets with duplicate fragments, * Determine duplicate overlapping and oversized fragments at arrival. That = change can cause multiple extra scans over already received fragments and might= affect overall system throughput. =20 ? =20 > + >=20 > ABI Changes > ----------- > -- > 2.53.0