From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <vhuertas@gmail.com>
Received: from mail-wm0-f45.google.com (mail-wm0-f45.google.com [74.125.82.45])
 by dpdk.org (Postfix) with ESMTP id 65AD52B99
 for <dev@dpdk.org>; Thu, 22 Feb 2018 18:35:02 +0100 (CET)
Received: by mail-wm0-f45.google.com with SMTP id t82so5063708wmt.5
 for <dev@dpdk.org>; Thu, 22 Feb 2018 09:35:02 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025;
 h=mime-version:from:date:message-id:subject:to;
 bh=7Cb6dPSzCHAerSm4oOtR5jxe3o1+eOqKov5iZC2vlEs=;
 b=kiSz3CIzH80rr0A/WpMijchNYSpI27fXN/WBpugKzhZLXJUqnF3e5Sy9clS3CauWtP
 GpO8WVgGxeSjg4JMVrI3pZ7fFZuefGSdtbOwTWNLmyDsL3YwfdbRwcmarbUAAS1Srfag
 W7gPZICifuF4D+VLRTQlr9+DORh/3P9rY+emShvma9V5O9FmU7d4w+JyJRKD8lE92MSJ
 jlpzVJRD+iJPxXvi5rhofBowqB3oyTVNFhbcAzIImAwB7CaWuV8/3I+A5vuaUz/exGO7
 ylz5pMSgER1YajMx/Y2vEmsSARzOrbT3GWXQvlB8+ru3B/kZfMO9JZMOnEiFzceP8NsO
 Fwdw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
 bh=7Cb6dPSzCHAerSm4oOtR5jxe3o1+eOqKov5iZC2vlEs=;
 b=NmHMYOONCwHiaV4McaRI7+uxnsVWy/cLwaerPFuqD4b4TlEQWS91ABw2mFL8k8RWjk
 +LhyEiC2eFX2CPMfkwtP246j5+P3585Xv9prdP8iQAxYRhmRciL5IyWR6KVEM0hxLB2n
 UUW15yTAIEv4s/Re+31N64a+VWnB+OzlUbth7q7weHdjaFgqN1F2m1p0pLHRWfcIsg5A
 LYLdHZCEO2J282ObLSgfhSDTbRpJNa3xyDBN2462ciDGsDOcUddxBNgVjZ+XwRNAvOR3
 C9ElDWJq285q4I7KDk3WMMlas9AK16K1W1nkqs796AvEQS8cqcIVenwdSVnTPDZf4vg5
 9a0g==
X-Gm-Message-State: APf1xPBQigYDmxX6XQgSQgGF7XltI8VpRu35g3GRrDy4frmHmReQ0GTj
 lRyMgqF6vdXFFgK9517coyNANALqVN1kJjEUIs4=
X-Google-Smtp-Source: AH8x226/TNLhwk4LVyxOemTTbbnXHFzV7HskLjB/CHmaWR0VvDc5nkdIiQ3n+bi2xBCF7X8LA+Zwtxxz4CFnX/amrUs=
X-Received: by 10.80.177.89 with SMTP id l25mr10395151edd.267.1519320901951;
 Thu, 22 Feb 2018 09:35:01 -0800 (PST)
MIME-Version: 1.0
Received: by 10.80.185.37 with HTTP; Thu, 22 Feb 2018 09:35:01 -0800 (PST)
From: Victor Huertas <vhuertas@gmail.com>
Date: Thu, 22 Feb 2018 18:35:01 +0100
Message-ID: <CAGxG5ciiEGvYd-TK3i+zWXwhbhrUz_a6ydvRwmezLaUA0K0u2A@mail.gmail.com>
To: dev@dpdk.org
Content-Type: text/plain; charset="UTF-8"
X-Content-Filtered-By: Mailman/MimeDel 2.1.15
Subject: [dpdk-dev] Suggestions on how to customize the metadata fields of
	each packet
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Thu, 22 Feb 2018 17:35:02 -0000

Hi all,

In the project I am working I need to define custom metadata fields on each
packet once they are captured using DPDK.
I have seen that each packet has a headroom memory space (128 bytes long)
where RSS hashing and other metadata provided by the NIC is stored. This
information will be useful for me but I need to add some further fields to
these metadata without having to modify the source code of the library.

Do you which is the best practice to do it? Do I have for example to define
a struct that contains rte_mbuf struct and additional metadata struct?

struct new_packet{

struct rte_mbuf;
struct additional_metadata

}

I would appreciate it if you could provide me with some guidelines to know
how to implement it.

Thanks a lot

-- 
Victor