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header.from=amd.com; Received: from CH2PR12MB4294.namprd12.prod.outlook.com (2603:10b6:610:a9::11) by DM4PR12MB6664.namprd12.prod.outlook.com (2603:10b6:8:bb::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7091.28; Thu, 14 Dec 2023 12:18:31 +0000 Received: from CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::2569:edb2:670f:816f]) by CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::2569:edb2:670f:816f%6]) with mapi id 15.20.7091.028; Thu, 14 Dec 2023 12:18:31 +0000 Message-ID: <21f3a14e-3ec1-45fa-b619-66f4b2007fcf@amd.com> Date: Thu, 14 Dec 2023 12:18:24 +0000 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/2] ethdev: add random item support Content-Language: en-US To: Michael Baum <michaelba@nvidia.com>, dev@dpdk.org Cc: Ori Kam <orika@nvidia.com>, Dariusz Sosnowski <dsosnowski@nvidia.com>, Aman Singh <aman.deep.singh@intel.com>, Yuying Zhang <yuying.zhang@intel.com>, Thomas Monjalon <thomas@monjalon.net> References: <20231130163215.666239-1-michaelba@nvidia.com> <20231214105844.1640764-1-michaelba@nvidia.com> <20231214105844.1640764-2-michaelba@nvidia.com> From: Ferruh Yigit <ferruh.yigit@amd.com> Autocrypt: addr=ferruh.yigit@amd.com; keydata= xsFNBGJDD3EBEAC/M7Tk/DfQSmP1K96vyzdhfSBzlCaGtcxNXorq4fALruqVsD3oi0yfyEz9 4YN8x7py0o9EL8ZdpOX0skc0AMCDAaw033uWhCn0GLMeGRKUbfOAPvL6ecSDvGD7CJIO9j0J eZUvasBgPdM/435PEr9DmC6Ggzdzt8IuG4PoLi5jpFSfcqxZFCCxLUDEo/w0nuguk2FTuYJg B2zEZ4JTBZrw7hIHiFh8D8hr6YA6a5uTofq1tr+l048lbtdFUl8TR0aIExVzE4Z8qKZlcE+9 RQaewjK5Al1jLE4sHdmd3GN+IvgDF3D/fLsi25SKJDeGSdeHkOmaX0qGeM4WKIfU6iARRCiQ N3AmBIxZ/A7UXBKLaOyZ+/i3sE6Wb53nrO4i8+0K2Qwyh6LjTeiJAIjYKN43ppxz3DaI+QwQ vI+uyHr4Gg0Da9EPPz/YyKauSeOZCfCB5gIfICO0j6x0SCl8uQ2nLpjxcZkf0gjcwUzP3h+S 3x6NfDji9YEij0zczW/dcSpGgZ6vsFpPrtnP9ZXy6J53yp0kJtOJoOlkEFFdU2yCZnCDseum CoudmGLZVvS0/DzHDJejq+3kK3FDGktZBOxZIIpal+nFqS7lVgOZc4+huVv3jyhzoAUOEyXA XK5j6o7g8STUY+z33QNnHpdLvecMwuzmvqy0jR54yAbZ64mB9QARAQABzSNGZXJydWggWWln 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discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org On 12/14/2023 10:58 AM, Michael Baum wrote: > Add support for a new item type "RTE_FLOW_ITEM_TYPE_RANDOM". > This item enables to match on some random value as a part of flow rule. > > Signed-off-by: Michael Baum <michaelba@nvidia.com> > --- > doc/guides/nics/features/default.ini | 1 + > doc/guides/prog_guide/rte_flow.rst | 14 +++++++++++ > doc/guides/rel_notes/release_24_03.rst | 5 ++++ > lib/ethdev/rte_flow.c | 1 + > lib/ethdev/rte_flow.h | 35 +++++++++++++++++++++++++- > 5 files changed, 55 insertions(+), 1 deletion(-) > > diff --git a/doc/guides/nics/features/default.ini b/doc/guides/nics/features/default.ini > index 806cb033ff..6d50236292 100644 > --- a/doc/guides/nics/features/default.ini > +++ b/doc/guides/nics/features/default.ini > @@ -140,6 +140,7 @@ pppoe_proto_id = > ptype = > quota = > raw = > +random = > represented_port = > sctp = > tag = > diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst > index 627b845bfb..900fdaefb6 100644 > --- a/doc/guides/prog_guide/rte_flow.rst > +++ b/doc/guides/prog_guide/rte_flow.rst > @@ -1573,6 +1573,20 @@ Matches the packet type as defined in rte_mbuf_ptype. > > - ``packet_type``: L2/L3/L4 and tunnel information. > > +Item: ``RANDOM`` > +^^^^^^^^^^^^^^^^ > + > +Matches a random value. > + > +A random unsigned integer (at most 32-bit) is generated for each packet during > +flow rule processing, by either HW, SW or some external source. > +Application can match on either exact value or range of values. > +This value is not based on the packet data/headers. > +Application shouldn't assume that this value is kept during the lifetime of > +the packet. > + > +- ``value``: Specific value to match. > + Hi Michael, What is the usecase for the 'random' flow item? Is it to match some kind of metadata generated by HW? Or is it a way to sampling traffic? And how random 'random' item is, is it configured/set in HW or random per packet?