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 A1427C433EF for ; Mon, 6 Dec 2021 17:11:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229481AbhLFRPT (ORCPT ); Mon, 6 Dec 2021 12:15:19 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:21785 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239283AbhLFRPS (ORCPT ); Mon, 6 Dec 2021 12:15:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1638810709; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oYJSRXlCQvqoekkmUT1Fgmbdlhji9wMR6mcn5EGWQwM=; b=bE/n4ctN9/iwVqA5mSm9z1Gr0qCniuAQUI/cDJ6mj37b9VYdv/qCx8ZC/ROSos37ZnYF5g lYBnHjcSghEgYF+eoTKMtxmMd4AOW2fxQ+XenzArk9/ecEfE39ZWqaaZXCsjvkCGJl5sTt 7xvmXSdmHCPLbtkYo8oMPZbb8qv6jCQ= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-54-goDnkK-QP9-HkxsGtf5HzA-1; Mon, 06 Dec 2021 12:11:46 -0500 X-MC-Unique: goDnkK-QP9-HkxsGtf5HzA-1 Received: by mail-ed1-f72.google.com with SMTP id eg20-20020a056402289400b003eb56fcf6easo8857320edb.20 for ; Mon, 06 Dec 2021 09:11:46 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:message-id:date:mime-version:user-agent:cc :subject:content-language:to:references:in-reply-to :content-transfer-encoding; bh=oYJSRXlCQvqoekkmUT1Fgmbdlhji9wMR6mcn5EGWQwM=; b=1RFCOjjCLlNPULoQM1yA/9OV68b1KAl2L3UD3Fz5Z8dodzkn0wBMOnzuz/DlezdZoF 1d/07jRPRNV/AWYMCMUZVW8Fts47SyXO0AwvvNWtlKaXC9VBODz6AZhTxqViPM3QHGmS 0L8OlR/fgj/tiwy40brGMJehxwQmW6XRxH95GTKoJD5OJ5zC6UCK8QzPFCNZweZP32P1 YOuabjqiBQEhz963vLX4H8m7ebem7on/MeRxxbmJYHWXC3E7cgrOssKkHV9DwBEGxVl4 q/YvnAqsGwlFdia09lc9Mi3zA9gUMzQ6Iez8YFvr8tkpArnXfdBsSNBFXBOOQuy0lb1l wnSA== X-Gm-Message-State: AOAM53163aZqzWNYxhc0pvqSCaiWW+vFYKowPTtZ5+ePDzpyn0ke1RnC iuCOa/qdIXDMlzS4maKFMKNriUSpIaXxkzwIribkGCKmVzqlrPUq0cQnIxDhbC6F7kBh8iDath3 2ukjRnvHHXB/Z X-Received: by 2002:a17:906:52d8:: with SMTP id w24mr48564713ejn.296.1638810705567; Mon, 06 Dec 2021 09:11:45 -0800 (PST) X-Google-Smtp-Source: ABdhPJzyoD56llMY1ZDKzFDTD4gBAP/S5avR11d4drDEw8qzIJZQpt9yV7apY6Nc+5UF8JmIlgAWxQ== X-Received: by 2002:a17:906:52d8:: with SMTP id w24mr48564681ejn.296.1638810705381; Mon, 06 Dec 2021 09:11:45 -0800 (PST) Received: from [192.168.2.13] (3-14-107-185.static.kviknet.dk. [185.107.14.3]) by smtp.gmail.com with ESMTPSA id h7sm9563725ede.40.2021.12.06.09.11.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 06 Dec 2021 09:11:44 -0800 (PST) From: Jesper Dangaard Brouer X-Google-Original-From: Jesper Dangaard Brouer Message-ID: <88f9b4e9-9074-a507-426d-7c947f1e2b13@redhat.com> Date: Mon, 6 Dec 2021 18:11:43 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Cc: brouer@redhat.com, lorenzo.bianconi@redhat.com, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, shayagr@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, echaudro@redhat.com, jasowang@redhat.com, alexander.duyck@gmail.com, saeed@kernel.org, maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, tirthendu.sarkar@intel.com, toke@redhat.com Subject: Re: [PATCH v19 bpf-next 23/23] xdp: disable XDP_REDIRECT for xdp multi-buff Content-Language: en-US To: Lorenzo Bianconi , bpf@vger.kernel.org, netdev@vger.kernel.org References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On 30/11/2021 12.53, Lorenzo Bianconi wrote: > XDP_REDIRECT is not fully supported yet for xdp multi-buff since not > all XDP capable drivers can map non-linear xdp_frame in ndo_xdp_xmit > so disable it for the moment. > > Signed-off-by: Lorenzo Bianconi > --- > net/core/filter.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/net/core/filter.c b/net/core/filter.c > index b70725313442..a87d835d1122 100644 > --- a/net/core/filter.c > +++ b/net/core/filter.c > @@ -4189,6 +4189,13 @@ int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp, > struct bpf_map *map; > int err; > > + /* XDP_REDIRECT is not fully supported yet for xdp multi-buff since > + * not all XDP capable drivers can map non-linear xdp_frame in > + * ndo_xdp_xmit. > + */ > + if (unlikely(xdp_buff_is_mb(xdp))) > + return -EOPNOTSUPP; > + This approach also exclude 'cpumap' use-case, which you AFAIK have added MB support for in this patchset. Generally this check is hopefully something we can remove again, once drivers add MB ndo_xdp_xmit support. > ri->map_id = 0; /* Valid map id idr range: [1,INT_MAX[ */ > ri->map_type = BPF_MAP_TYPE_UNSPEC; > >