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{ "id": 2217623, "url": "http://patchwork.ozlabs.org/api/covers/2217623/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20260330090944.1008027-1-lulu@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260330090944.1008027-1-lulu@redhat.com>", "list_archive_url": null, "date": "2026-03-30T08:58:08", "name": "[RFC,v3,0/7] net/filter: Add AF_PACKET support for vhost-net", "submitter": { "id": 78960, "url": "http://patchwork.ozlabs.org/api/people/78960/?format=api", "name": "Cindy Lu", "email": "lulu@redhat.com" }, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20260330090944.1008027-1-lulu@redhat.com/mbox/", "series": [ { "id": 497984, "url": "http://patchwork.ozlabs.org/api/series/497984/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=497984", "date": "2026-03-30T08:58:09", "name": "net/filter: Add AF_PACKET support for vhost-net", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497984/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2217623/comments/", "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=ZsY/BXyG;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fklpN3y6Qz1xrn\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 30 Mar 2026 20:10:36 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1w78dL-0005Ov-Pu; Mon, 30 Mar 2026 05:10:07 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <lulu@redhat.com>) id 1w78dI-0005Ng-5K\n for qemu-devel@nongnu.org; Mon, 30 Mar 2026 05:10:05 -0400", "from us-smtp-delivery-124.mimecast.com ([170.10.129.124])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <lulu@redhat.com>) id 1w78dF-00009h-8A\n for qemu-devel@nongnu.org; Mon, 30 Mar 2026 05:10:02 -0400", "from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com\n (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by\n relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n cipher=TLS_AES_256_GCM_SHA384) id us-mta-519-1T75LCnWOr-UM1EnJWgImw-1; Mon,\n 30 Mar 2026 05:09:55 -0400", "from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com\n (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS\n id E329019560BB; Mon, 30 Mar 2026 09:09:53 +0000 (UTC)", "from S2.redhat.com (unknown [10.72.112.39])\n by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP\n id 6459E30001A1; Mon, 30 Mar 2026 09:09:50 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1774861798;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n bh=eWiA0Dh9/0XY7MFofigYdL6zxy9cWPVcg9gwC7ePO1o=;\n b=ZsY/BXyGnPhUU1rUW3PKNnQljoBGygi75u4qc+G9i2ndwGDDLIkf12fj2hr42AZIUB4rns\n AMdWBvPJs0Wxn098B7OLWfhll1IU9wdIDmPNQTmtX6KJZOhCsQt0A9YaPctp1/XTwju0eR\n 1Oo+8+QP9GoasT5Z6oxAJcrZlRwyspE=", "X-MC-Unique": "1T75LCnWOr-UM1EnJWgImw-1", "X-Mimecast-MFC-AGG-ID": "1T75LCnWOr-UM1EnJWgImw_1774861794", "From": "Cindy Lu <lulu@redhat.com>", "To": "lulu@redhat.com, mst@redhat.com, jasowang@redhat.com, zhangckid@gmail.com,\n lizhijian@fujitsu.com, jmarcin@redhat.com, qemu-devel@nongnu.org", "Subject": "[RFC v3 0/7] net/filter: Add AF_PACKET support for vhost-net", "Date": "Mon, 30 Mar 2026 16:58:08 +0800", "Message-ID": "<20260330090944.1008027-1-lulu@redhat.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.4", "Received-SPF": "pass client-ip=170.10.129.124; envelope-from=lulu@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com", "X-Spam_score_int": "27", "X-Spam_score": "2.7", "X-Spam_bar": "++", "X-Spam_report": "(2.7 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.54,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_SBL_CSS=3.335,\n RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=1, RCVD_IN_VALIDITY_RPBL_BLOCKED=1,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Hi, All\n\nThis series adds AF_PACKET-based capture and injection datapath\nsupport for the vhost TAP device in filter\n\nExample Usage(not change with exist upstream code)\n=============\nPrimary VM (mirror incoming packets to secondary via chardev socket):\n\n -netdev tap,id=net0,vhost=on,...\n -chardev socket,id=mirror0,host=...,port=...,server=on,wait=off\n -object filter-redirector,id=vm1redir,netdev=net0,outdev=mirror0...\n\nSecondary VM (receive mirrored packets):\n \n -netdev tap,id=net0,vhost=on,...\n -chardev socket,id=red0,host=...,port=...,reconnect-ms=..\n -object filter-buffer,id=swbuf,netdev=net0,queue=tx,interval=1000000,status=off.....\n -object filter-redirector,id=r1,netdev=net0,queue=tx,indev=red0,status=off,enable_when\n _stopped=true.... \\\n\nchangset\n===========\nchange in v2: \n1. add support for filter-buffer \n2. remove the in_netdev and out_netdev for AF_PACKET bind port, now only use netdev \nwhen the vhost=on start use AF_PACKET to capture and inject, when use vhost=off will use\nthe existing code\n3. add CAP_NET_RAW check\n4. address the comment \n\nchange in v3: \n1. reuse the exist Capture/inject process \n\nTesting\n=======\n- Tested with vhost=on/off TAP device on x86_64\n\nknown issue: \n============\n1. compilation should be disabled on non-Linux platforms.will fix in next version.\n2. Sometimes the secondary VM receives duplicate packets. will fix this in next version.\n\n\nCindy Lu (7):\n net/filter-mirror: keep mirroring while stopped\n virtio-net: keep tap read polling disabled while vhost owns RX\n net/filter-redirector: add AF_PACKET netdev setup helpers\n net/filter-redirector: add AF_PACKET capture path\n net/filter-redirector: add AF_PACKET inject path\n net/filter: allow filters on vhost TAP backends\n net/filter-redirector: check CAP_NET_RAW before creating AF_PACKET\n\n hw/net/virtio-net.c | 12 +-\n include/net/filter.h | 6 +\n include/net/net.h | 6 +\n net/filter-mirror.c | 379 ++++++++++++++++++++++++++++++++++++++++++-\n net/filter.c | 17 +-\n net/net.c | 10 +-\n 6 files changed, 417 insertions(+), 13 deletions(-)" }