{"id":1375802,"url":"http://patchwork.ozlabs.org/api/patches/1375802/?format=json","web_url":"http://patchwork.ozlabs.org/project/netdev/patch/766be172da94e75c9ab963c29b110545aeb4bfa6.1601648734.git.lorenzo@kernel.org/","project":{"id":7,"url":"http://patchwork.ozlabs.org/api/projects/7/?format=json","name":"Linux network development","link_name":"netdev","list_id":"netdev.vger.kernel.org","list_email":"netdev@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<766be172da94e75c9ab963c29b110545aeb4bfa6.1601648734.git.lorenzo@kernel.org>","list_archive_url":null,"date":"2020-10-02T14:41:59","name":"[v4,bpf-next,01/13] xdp: introduce mb in xdp_buff/xdp_frame","commit_ref":null,"pull_url":null,"state":"changes-requested","archived":false,"hash":"9560331fbc189adb84ae858b4fac773b17f8d6a4","submitter":{"id":76007,"url":"http://patchwork.ozlabs.org/api/people/76007/?format=json","name":"Lorenzo Bianconi","email":"lorenzo@kernel.org"},"delegate":{"id":77147,"url":"http://patchwork.ozlabs.org/api/users/77147/?format=json","username":"bpf","first_name":"BPF","last_name":"Maintainers","email":"bpf@iogearbox.net"},"mbox":"http://patchwork.ozlabs.org/project/netdev/patch/766be172da94e75c9ab963c29b110545aeb4bfa6.1601648734.git.lorenzo@kernel.org/mbox/","series":[{"id":205635,"url":"http://patchwork.ozlabs.org/api/series/205635/?format=json","web_url":"http://patchwork.ozlabs.org/project/netdev/list/?series=205635","date":"2020-10-02T14:41:58","name":"mvneta: introduce XDP multi-buffer support","version":4,"mbox":"http://patchwork.ozlabs.org/series/205635/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/1375802/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/1375802/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"patchwork-incoming-netdev@ozlabs.org","Delivered-To":"patchwork-incoming-netdev@ozlabs.org","Authentication-Results":["ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=23.128.96.18; helo=vger.kernel.org;\n envelope-from=netdev-owner@vger.kernel.org; receiver=)","ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=kernel.org","ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=default header.b=Gj7gcBIz;\n\tdkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [23.128.96.18])\n\tby ozlabs.org (Postfix) with ESMTP id 4C2t4h5mxVz9sT6\n\tfor ;\n Sat, 3 Oct 2020 00:42:28 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n id S2388168AbgJBOm2 (ORCPT\n );\n Fri, 2 Oct 2020 10:42:28 -0400","from mail.kernel.org ([198.145.29.99]:60722 \"EHLO mail.kernel.org\"\n rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP\n id S1726017AbgJBOm1 (ORCPT );\n Fri, 2 Oct 2020 10:42:27 -0400","from lore-desk.redhat.com (unknown [176.207.245.61])\n (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n (No client certificate requested)\n by mail.kernel.org (Postfix) with ESMTPSA id E37C120708;\n Fri, 2 Oct 2020 14:42:24 +0000 (UTC)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n s=default; t=1601649747;\n bh=faswXucbeuzZqOUQXHuvRp84THj+t6EmxOfz9TN2TVA=;\n h=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n b=Gj7gcBIzjKA6yzu4AHVaiSlKXZsChYAJitEi21J6NdSqFjsAVZOSyaP38GjnvhMPT\n UaTywkVYfmuAZrJhl2aGCYr9ICk99Ex9jUAhAzlyQr43eWLl/V92vTJdNi2u+NORm3\n AuE/j3Zy6N5wZ8QmnZRLv45Axk5qxiQsV0Fs+NUE=","From":"Lorenzo Bianconi ","To":"bpf@vger.kernel.org, netdev@vger.kernel.org","Cc":"davem@davemloft.net, kuba@kernel.org, ast@kernel.org,\n daniel@iogearbox.net, shayagr@amazon.com, sameehj@amazon.com,\n john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com,\n lorenzo.bianconi@redhat.com, echaudro@redhat.com","Subject":"[PATCH v4 bpf-next 01/13] xdp: introduce mb in xdp_buff/xdp_frame","Date":"Fri, 2 Oct 2020 16:41:59 +0200","Message-Id":"\n <766be172da94e75c9ab963c29b110545aeb4bfa6.1601648734.git.lorenzo@kernel.org>","X-Mailer":"git-send-email 2.26.2","In-Reply-To":"","References":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"},"content":"Introduce multi-buffer bit (mb) in xdp_frame/xdp_buffer data structure\nin order to specify if this is a linear buffer (mb = 0) or a multi-buffer\nframe (mb = 1). In the latter case the shared_info area at the end of the\nfirst buffer is been properly initialized to link together subsequent\nbuffers.\n\nSigned-off-by: Lorenzo Bianconi \n---\n include/net/xdp.h | 8 ++++++--\n net/core/xdp.c | 1 +\n 2 files changed, 7 insertions(+), 2 deletions(-)","diff":"diff --git a/include/net/xdp.h b/include/net/xdp.h\nindex 3814fb631d52..42f439f9fcda 100644\n--- a/include/net/xdp.h\n+++ b/include/net/xdp.h\n@@ -72,7 +72,8 @@ struct xdp_buff {\n \tvoid *data_hard_start;\n \tstruct xdp_rxq_info *rxq;\n \tstruct xdp_txq_info *txq;\n-\tu32 frame_sz; /* frame size to deduce data_hard_end/reserved tailroom*/\n+\tu32 frame_sz:31; /* frame size to deduce data_hard_end/reserved tailroom*/\n+\tu32 mb:1; /* xdp non-linear buffer */\n };\n \n /* Reserve memory area at end-of data area.\n@@ -96,7 +97,8 @@ struct xdp_frame {\n \tu16 len;\n \tu16 headroom;\n \tu32 metasize:8;\n-\tu32 frame_sz:24;\n+\tu32 frame_sz:23;\n+\tu32 mb:1; /* xdp non-linear frame */\n \t/* Lifetime of xdp_rxq_info is limited to NAPI/enqueue time,\n \t * while mem info is valid on remote CPU.\n \t */\n@@ -141,6 +143,7 @@ void xdp_convert_frame_to_buff(struct xdp_frame *frame, struct xdp_buff *xdp)\n \txdp->data_end = frame->data + frame->len;\n \txdp->data_meta = frame->data - frame->metasize;\n \txdp->frame_sz = frame->frame_sz;\n+\txdp->mb = frame->mb;\n }\n \n static inline\n@@ -167,6 +170,7 @@ int xdp_update_frame_from_buff(struct xdp_buff *xdp,\n \txdp_frame->headroom = headroom - sizeof(*xdp_frame);\n \txdp_frame->metasize = metasize;\n \txdp_frame->frame_sz = xdp->frame_sz;\n+\txdp_frame->mb = xdp->mb;\n \n \treturn 0;\n }\ndiff --git a/net/core/xdp.c b/net/core/xdp.c\nindex 48aba933a5a8..884f140fc3be 100644\n--- a/net/core/xdp.c\n+++ b/net/core/xdp.c\n@@ -454,6 +454,7 @@ struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp)\n \txdpf->headroom = 0;\n \txdpf->metasize = metasize;\n \txdpf->frame_sz = PAGE_SIZE;\n+\txdpf->mb = xdp->mb;\n \txdpf->mem.type = MEM_TYPE_PAGE_ORDER0;\n \n \txsk_buff_free(xdp);\n","prefixes":["v4","bpf-next","01/13"]}