From nobody Sun Feb 8 19:56:27 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=yodel.dev ARC-Seal: i=1; a=rsa-sha256; t=1769693591; cv=none; d=zohomail.com; s=zohoarc; b=JJkOipjVKPyG6QjSQMTcsXHs31HGZuoCS9+T90Gl+N/xlNujgk+1+u2uSqTFtW4F+B5LQ7ByGOFHjIcMc88hG147Tfnub3JLyjcfvM9D9+M105ZkXEF7eHpz2t1wY/gwIgHybdTy7wX5Gh2gM6vwNEjNCfxsDs355PYVIPPpSmw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1769693591; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=kgquQpF2g+PzRJvMQiQu1Tdx631FtZ+L4+iJOqwiLJg=; b=HAQBbzEiAvaUGw5UzQfBjfM/JyA+rkOB7zkXAksMXL7ulcbV34awwShv3RmDotsSPAe0cg4usqoH8pxJKkLfuPHFYbprjLlrX7T12ZZULIiX6v/TQ5MnFEAgsWeNdH1/KTtN4zkWhL5hwbGfJ+1Urj8D2Nq8OL7FI+iROneQou4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 176969359099789.85496567144048; Thu, 29 Jan 2026 05:33:10 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vlS8F-0007tu-6A; Thu, 29 Jan 2026 08:32:23 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vlS7S-0007bN-C0 for qemu-devel@nongnu.org; Thu, 29 Jan 2026 08:31:44 -0500 Received: from k62.kb8c70eb.use4.send.mailgun.net ([204.220.184.62]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1vlS7P-0002KG-85 for qemu-devel@nongnu.org; Thu, 29 Jan 2026 08:31:33 -0500 Received: from mail.yodel.dev (mail.yodel.dev [35.209.39.246]) by 6407dfe53d2a0b3d7f8ac5f53fdcedf683ffe6e3a11d22dd7b1943316ba8d53a with SMTP id 697b6125834a10b0f0b46579; Thu, 29 Jan 2026 13:31:17 GMT X-Mailgun-Sid: WyI4ZDFlNiIsInFlbXUtZGV2ZWxAbm9uZ251Lm9yZyIsIjk3NjA3ZSJd X-Mailgun-Sending-Ip: 204.220.184.62 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yodel.dev; s=rsa2048; t=1769693477; bh=kgquQpF2g+PzRJvMQiQu1Tdx631FtZ+L4+iJOqwiLJg=; h=X-Mailgun-Dkim:From:To:Cc:Subject:Date:Message-ID:In-Reply-To: References:MIME-Version:Content-Type:Content-Transfer-Encoding: From:Reply-to:Subject:Date:Message-id:To:Cc:Mime-version: Content-type:Content-transfer-encoding:In-reply-to:References; b=nmTnGHD1rtHaOIiiKPsJ7FBdRoM/itkb0aVUEUpSifRrRWp7sAxyN5utCvp0FjLMh ASalMlHuyvx7WQ5pvpWUyLAAfB53SfW1gvVTdp/z4yyHwn0E+d0B3wbnmRVqe7khBr pjZtdsIDjbVYlhDKqP+mr9jtnW6SRmwZM5dcneGeKb9n/a7h7Y2kyB55kfPo0L2pEt G/5H+iVp8QAnlk365iw5XIXg6o9dm/I93W4tihDPHR4LxzAUT86hG2Hi0CepTxfmqh rt6L+R8nNV1B1mG2lO78ECG7oKT3xEbvZuKzLdTgGL8KV0N6Sxmp71g5SN23ybXyrd /TANtDLFoDZ9Q== X-Mailgun-Dkim: no X-Mailgun-Dkim: no From: Yodel Eldar To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Stefano Garzarella , Paolo Bonzini , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Thomas Huth , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Yodel Eldar Subject: [PATCH v4 1/3] tests/vhost-user-bridge: Move to contrib/vhost-user-bridge/ Date: Thu, 29 Jan 2026 07:30:47 -0600 Message-ID: <20260129133049.119829-2-yodel.eldar@yodel.dev> In-Reply-To: <20260129133049.119829-1-yodel.eldar@yodel.dev> References: <20260129133049.119829-1-yodel.eldar@yodel.dev> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=204.220.184.62; envelope-from=bounce+0e9322.97607e-qemu-devel=nongnu.org@yodel.dev; helo=k62.kb8c70eb.use4.send.mailgun.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @yodel.dev) X-ZM-MESSAGEID: 1769693592424158500 After the introduction of vhost-user-bridge and libvhost-user, we formed the convention of placing vhost-user daemons in eponymous subdirs of contrib/. Follow this convention. Create a contrib/vhost-user-bridge/ directory and move vhost-user-bridge into it. Extract its build target definition from tests/meson.build into the new directory, and include its subdir in the root-level meson.build. Add a section about it in the "vhost-user daemons in contrib" document. Reviewed-by: Marc-Andr=C3=A9 Lureau Signed-off-by: Yodel Eldar --- contrib/vhost-user-bridge/meson.build | 4 ++ .../vhost-user-bridge}/vhost-user-bridge.c | 0 .../devices/virtio/vhost-user-contrib.rst | 39 +++++++++++++++++++ meson.build | 1 + tests/meson.build | 6 --- 5 files changed, 44 insertions(+), 6 deletions(-) create mode 100644 contrib/vhost-user-bridge/meson.build rename {tests =3D> contrib/vhost-user-bridge}/vhost-user-bridge.c (100%) diff --git a/contrib/vhost-user-bridge/meson.build b/contrib/vhost-user-bri= dge/meson.build new file mode 100644 index 0000000000..aa58c1df20 --- /dev/null +++ b/contrib/vhost-user-bridge/meson.build @@ -0,0 +1,4 @@ +if have_tools and have_vhost_user and host_os =3D=3D 'linux' + executable('vhost-user-bridge', files('vhost-user-bridge.c'), + dependencies: [qemuutil, vhost_user], install: false) +endif diff --git a/tests/vhost-user-bridge.c b/contrib/vhost-user-bridge/vhost-us= er-bridge.c similarity index 100% rename from tests/vhost-user-bridge.c rename to contrib/vhost-user-bridge/vhost-user-bridge.c diff --git a/docs/system/devices/virtio/vhost-user-contrib.rst b/docs/syste= m/devices/virtio/vhost-user-contrib.rst index 48d04d2ade..660d29a700 100644 --- a/docs/system/devices/virtio/vhost-user-contrib.rst +++ b/docs/system/devices/virtio/vhost-user-contrib.rst @@ -85,3 +85,42 @@ vhost-user-scsi - SCSI controller =20 The vhost-user-scsi daemon can proxy iSCSI devices onto a virtualized SCSI controller. + +.. _vhost_user_bridge: + +vhost-user-bridge - Network bridge +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +The vhost-user-bridge daemon serves as a development tool for testing real +internet traffic by providing a networking backend, i.e. server, for the +vhost-user protocol. + +Example +------- +For a single QEMU instance that both runs the user-mode net stack (slirp) = and +serves as a vhost-user protocol frontend, i.e. client, simultaneously: + +First, start vhost-user-bridge: + +:: + + $ vhost-user-bridge -u /tmp/vubr.sock \ + -l 127.0.0.1:4444 \ + -r 127.0.0.1:5555 + +Then, invoke QEMU: + +:: + + $ qemu-system-x86_64 \ + -m 4G \ + -object memory-backend-memfd,id=3Dmem0,size=3D4G,share=3Don,preall= oc=3Don \ + -numa node,memdev=3Dmem0 \ + -chardev socket,id=3Dchar0,path=3D/tmp/vubr.sock \ + -netdev vhost-user,id=3Dvhost0,chardev=3Dchar0,vhostforce=3Don \ + -device virtio-net-pci,netdev=3Dvhost0 \ + -netdev socket,id=3Dudp0,udp=3Dlocalhost:4444,localaddr=3Dlocalhos= t:5555 \ + -netdev user,id=3Duser0 \ + -netdev hubport,id=3Dhub0,hubid=3D0,netdev=3Dudp0 \ + -netdev hubport,id=3Dhub1,hubid=3D0,netdev=3Duser0 \ + ... diff --git a/meson.build b/meson.build index cc0dfed066..bca61aae65 100644 --- a/meson.build +++ b/meson.build @@ -4494,6 +4494,7 @@ if have_tools =20 if have_vhost_user subdir('contrib/vhost-user-blk') + subdir('contrib/vhost-user-bridge') subdir('contrib/vhost-user-gpu') subdir('contrib/vhost-user-input') subdir('contrib/vhost-user-scsi') diff --git a/tests/meson.build b/tests/meson.build index cbe7916241..87861b2857 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -70,12 +70,6 @@ test_deps =3D { 'test-qht-par': qht_bench, } =20 -if have_tools and have_vhost_user and host_os =3D=3D 'linux' - executable('vhost-user-bridge', - sources: files('vhost-user-bridge.c'), - dependencies: [qemuutil, vhost_user]) -endif - subdir('decode') =20 if 'CONFIG_TCG' in config_all_accel --=20 2.52.0 From nobody Sun Feb 8 19:56:27 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Thu, 29 Jan 2026 08:31:34 -0500 Received: from mail.yodel.dev (mail.yodel.dev [35.209.39.246]) by f1223ecced80858bbad775d175c50b6e91ebe3fce9827e5e39109b33fe32f804 with SMTP id 697b6126590331631227dfd0; Thu, 29 Jan 2026 13:31:18 GMT X-Mailgun-Sid: WyI4ZDFlNiIsInFlbXUtZGV2ZWxAbm9uZ251Lm9yZyIsIjk3NjA3ZSJd X-Mailgun-Sending-Ip: 204.220.184.62 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yodel.dev; s=rsa2048; t=1769693477; bh=8NqHF/w1c3OfHxDB1XcmG7aRHsFMNXz3lqfpDHHHZlo=; h=X-Mailgun-Dkim:From:To:Cc:Subject:Date:Message-ID:In-Reply-To: References:MIME-Version:Content-Type:Content-Transfer-Encoding: From:Reply-to:Subject:Date:Message-id:To:Cc:Mime-version: Content-type:Content-transfer-encoding:In-reply-to:References; b=Ay4MvJ/hYAqvyTgJeSrX9qF+vZBJMtOXswlMre/XCq98arX80/7enwijUCPlgtlsD lm/SCjIQHtCg1sr8Fo7j/8Q+jus/RYmq9d1hzxrVP80YlC8amFTUVsH6dSobOd2HmI Foj06vM0BF/axMS8F0PT6AmP6OEAd4KF9F0clu8hSBOXR0ENRGm0ZqqovbxCYlL060 HzsBgnT8DKjqni9qnq0TCK4O0VsOkSDvGD+B0rjLKGgeaoHiZPH8vBdwAKR0Tu8Yk6 7GJMsFY0GzH8X4n0jDlNWbqOJhJvF1vLLxyz2kHIZzeibM77jjSOgOoWHuIKZ0mP5b cuaA7uzx6eM0w== X-Mailgun-Dkim: no X-Mailgun-Dkim: no From: Yodel Eldar To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Stefano Garzarella , Paolo Bonzini , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Thomas Huth , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Yodel Eldar , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH v4 2/3] tests/functional/x86_64: Add vhost-user-bridge test Date: Thu, 29 Jan 2026 07:30:48 -0600 Message-ID: <20260129133049.119829-3-yodel.eldar@yodel.dev> In-Reply-To: <20260129133049.119829-1-yodel.eldar@yodel.dev> References: <20260129133049.119829-1-yodel.eldar@yodel.dev> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=204.220.184.62; envelope-from=bounce+0e9322.97607e-qemu-devel=nongnu.org@yodel.dev; helo=k62.kb8c70eb.use4.send.mailgun.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @yodel.dev) X-ZM-MESSAGEID: 1769693679195158500 Introduce a functional test of vhost-user-bridge and enter it into MAINTAINERS under the vhost section. The test runs vhost-user-bridge as a subprocess, then launches a guest with four backends: a unix domain socket for vhost-user, a UDP socket, a user-mode net, and a hubport to hub the UDP and user backends; only the vhost-user backend is exposed, the rest are deviceless. This configuration mimics the testing setup described in the initial commit of vhost-user-bridge in 3595e2eb0a23. The test creates a scratch file containing a hardcoded UUID on the host and exposes it to the the guest via the tftp parameter of the user netdev. After the guest invokes tftp to request the file, the test verifies the transfer by hashsum. Similarly, the test creates a file with another hardcoded UUID in the guest. A call to check_http_download() serves the file to the host via http, whereupon a check of the file hashsum occurs on the host. Lastly, add the test to the thorough tests suite in meson.build. Suggested-by: C=C3=A9dric Le Goater Suggested-by: Marc-Andr=C3=A9 Lureau Suggested-by: Michael S. Tsirkin Suggested-by: Thomas Huth Reviewed-by: Thomas Huth Reviewed-by: Marc-Andr=C3=A9 Lureau Signed-off-by: Yodel Eldar --- MAINTAINERS | 1 + tests/functional/x86_64/meson.build | 1 + .../x86_64/test_vhost_user_bridge.py | 147 ++++++++++++++++++ 3 files changed, 149 insertions(+) create mode 100755 tests/functional/x86_64/test_vhost_user_bridge.py diff --git a/MAINTAINERS b/MAINTAINERS index dccdf47888..234b076397 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2395,6 +2395,7 @@ F: subprojects/libvhost-user/ F: block/export/vhost-user* F: util/vhost-user-server.c F: net/vhost* +F: tests/functional/x86_64/test_vhost_user_bridge.py =20 vhost-shadow-virtqueue R: Eugenio P=C3=A9rez diff --git a/tests/functional/x86_64/meson.build b/tests/functional/x86_64/= meson.build index f78eec5e6c..beab4f304b 100644 --- a/tests/functional/x86_64/meson.build +++ b/tests/functional/x86_64/meson.build @@ -34,6 +34,7 @@ tests_x86_64_system_thorough =3D [ 'reverse_debug', 'tuxrun', 'vfio_user_client', + 'vhost_user_bridge', 'virtio_balloon', 'virtio_gpu', ] diff --git a/tests/functional/x86_64/test_vhost_user_bridge.py b/tests/func= tional/x86_64/test_vhost_user_bridge.py new file mode 100755 index 0000000000..c36c625420 --- /dev/null +++ b/tests/functional/x86_64/test_vhost_user_bridge.py @@ -0,0 +1,147 @@ +#!/usr/bin/env python3 +# +# Copyright (c) 2025 Software Freedom Conservancy, Inc. +# +# Author: Yodel Eldar +# +# SPDX-License-Identifier: GPL-2.0-or-later +""" +Test vhost-user-bridge (vubr) functionality: + + 1) Run vhost-user-bridge on the host. + 2) Launch a guest VM: + a) Instantiate a unix domain socket to the vubr-created path + b) Instantiate a vhost-user backend on top of that socket + c) Map a virtio-net-pci device to the vhost-user backend + d) Instantiate a UDP socket backend + e) Instantiate a user-mode net backend + i) Forward an ephemeral port to port 8080 in-guest with hostfw= d=3D + ii) Expose a generated scratch file to the guest with tftp=3D + f) Hub the UDP and user-mode backends. + 3) Invoke tftp in the guest to download exported scratch file from the= host. + 4) Serve a file to the host via http server in the guest. +""" + +import os +import shutil +import subprocess +from qemu_test import Asset, LinuxKernelTest, which +from qemu_test import exec_command_and_wait_for_pattern +from qemu_test import is_readable_executable_file +from qemu_test import wait_for_console_pattern +from qemu_test.ports import Ports + +class VhostUserBridge(LinuxKernelTest): + + ASSET_KERNEL_INITRAMFS =3D Asset( + "https://github.com/yodel/vhost-user-bridge-test/raw/refs/heads/ma= in/bzImage", + "8860d7aa59434f483542cdf25b42eacae0d4d4aa7ec923af9589d1ad4703d42b") + + HOST_UUID =3D "ba4c2e39-627f-487d-ae3b-93cc5d783eb8" + HOST_UUID_HSUM =3D \ + "d2932e34bf6c17b33e7325140b691e27c191d9ac4dfa550f68c09506facb09b9" + + GUEST_UUID =3D "143d2b21-fdf0-4c5e-a9ef-f35ebbac8945" + GUEST_UUID_HSUM =3D \ + "14b64203f5cf2afe520f8be0fdfe630aafc1e85d1301f55a0d1681e68881f3a2" + + def configure_vm(self, ud_socket_path, lport, rport, hostfwd_port, tft= pdir): + self.require_accelerator("kvm") + self.require_netdev("vhost-user") + self.require_netdev("socket") + self.require_netdev("hubport") + self.require_netdev("user") + self.require_device("virtio-net-pci") + self.set_machine("q35") + self.vm.add_args( + "-cpu", "host", + "-accel", "kvm", + "-append", "printk.time=3D0 console=3DttyS0", + "-smp", "2", + "-m", "128M", + "-object", "memory-backend-memfd,id=3Dmem0," + "size=3D128M,share=3Don,prealloc=3Don", + "-numa", "node,memdev=3Dmem0", + "-chardev", f"socket,id=3Dchar0,path=3D{ud_socket_path}", + "-netdev", "vhost-user,id=3Dvhost0,chardev=3Dchar0,vhostforc= e=3Don", + "-device", "virtio-net-pci,netdev=3Dvhost0", + "-netdev", f"socket,id=3Dudp0,udp=3Dlocalhost:{lport}," + f"localaddr=3Dlocalhost:{rport}", + "-netdev", "hubport,id=3Dhub0,hubid=3D0,netdev=3Dudp0", + "-netdev", f"user,id=3Duser0,tftp=3D{tftpdir}," + f"hostfwd=3Dtcp:127.0.0.1:{hostfwd_port}-:8080", + "-netdev", "hubport,id=3Dhub1,hubid=3D0,netdev=3Duser0" + ) + + def assemble_vubr_args(self, vubr_path, ud_socket_path, lport, rport): + vubr_args =3D [] + + if (stdbuf_path :=3D which("stdbuf")) is None: + self.log.info("Could not find stdbuf: vhost-user-bridge " + "log lines may appear out of order") + else: + vubr_args +=3D [stdbuf_path, "-o0", "-e0"] + + vubr_args +=3D [vubr_path, "-u", f"{ud_socket_path}", + "-l", f"127.0.0.1:{lport}", "-r", f"127.0.0.1:{rport= }"] + + return vubr_args + + def test_vhost_user_bridge(self): + prompt =3D "~ # " + host_uuid_filename =3D "vubr-test-uuid.txt" + guest_uuid_path =3D "/tmp/uuid.txt" + kernel_path =3D self.ASSET_KERNEL_INITRAMFS.fetch() + + vubr_path =3D self.build_file("contrib", "vhost-user-bridge", + "vhost-user-bridge") + if not is_readable_executable_file(vubr_path): + self.skipTest("Could not find a readable and executable " + "vhost-user-bridge") + + vubr_log_path =3D self.log_file("vhost-user-bridge.log") + self.log.info("For the vhost-user-bridge application log," + f" see: {vubr_log_path}") + + sock_dir =3D self.socket_dir() + ud_socket_path =3D os.path.join(sock_dir.name, "vubr-test.sock") + + tftpdir =3D self.scratch_file("tftp") + shutil.rmtree(tftpdir, ignore_errors=3DTrue) + os.mkdir(tftpdir) + host_uuid_path =3D self.scratch_file("tftp", host_uuid_filename) + with open(host_uuid_path, "w", encoding=3D"utf-8") as host_uuid_fi= le: + host_uuid_file.write(self.HOST_UUID) + + with Ports() as ports: + # pylint: disable=3Dunbalanced-tuple-unpacking + lport, rport, hostfwd_port =3D ports.find_free_ports(3) + + self.configure_vm(ud_socket_path, lport, rport, hostfwd_port, + tftpdir) + + vubr_args =3D self.assemble_vubr_args(vubr_path, ud_socket_pat= h, + lport, rport) + + with open(vubr_log_path, "w", encoding=3D"utf-8") as vubr_log,= \ + subprocess.Popen(vubr_args, stdin=3Dsubprocess.DEVNULL, + stdout=3Dvubr_log, + stderr=3Dsubprocess.STDOUT) as vubr_proc: + self.launch_kernel(kernel_path, wait_for=3Dprompt) + + exec_command_and_wait_for_pattern(self, + f"tftp -g -r {host_uuid_filename} 10.0.2.2 ; " + f"sha256sum {host_uuid_filename}", self.HOST_UUID_HSUM) + wait_for_console_pattern(self, prompt) + + exec_command_and_wait_for_pattern(self, + f"echo -n '{self.GUEST_UUID}' > {guest_uuid_path}", pr= ompt) + self.check_http_download(guest_uuid_path, self.GUEST_UUID_= HSUM) + wait_for_console_pattern(self, prompt) + + self.vm.shutdown() + vubr_proc.terminate() + vubr_proc.wait() + +if __name__ =3D=3D '__main__': + LinuxKernelTest.main() --=20 2.52.0 From nobody Sun Feb 8 19:56:27 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=yodel.dev ARC-Seal: i=1; a=rsa-sha256; t=1769693570; cv=none; d=zohomail.com; s=zohoarc; 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29 Jan 2026 13:31:18 GMT X-Mailgun-Sid: WyI4ZDFlNiIsInFlbXUtZGV2ZWxAbm9uZ251Lm9yZyIsIjk3NjA3ZSJd X-Mailgun-Sending-Ip: 204.220.184.57 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yodel.dev; s=rsa2048; t=1769693478; bh=Ej5O681xYjZWSg5wZN5ay/83YP28Uk0vBVTIItvtfIw=; h=X-Mailgun-Dkim:From:To:Cc:Subject:Date:Message-ID:In-Reply-To: References:MIME-Version:Content-Type:Content-Transfer-Encoding: From:Reply-to:Subject:Date:Message-id:To:Cc:Mime-version: Content-type:Content-transfer-encoding:In-reply-to:References; b=QY6yOLEG+HRIajvoIVojHO4qoA5DGt4JF1DtXc+VXdS+VxT6GPqdoxNfCREeJkzeK hMoxWiAiUDrlqVqQ5e1xj6eC5fZbV/nnEtXMOeeJridxEU3b14zMFSqOLokXl+fbn4 dQuU43tx/GF23sKH0YoNxsxpDKvS+/8QFw7LtTg9o8bcrFosm3+Y7nop+yoEPhSMtm 5JIAVz43KdxTTFe3GVSFgJn5QaoCZJ0tZ0zc/7zhWNU48UozNaXN4dYviUiHnXfmhM mkmgDtLNRnMVj4i7l64bKwK4Ps048hfmdMahRS2w+PnaZTMCZwOLhYY5g9YFwrH2z/ c+KAZkWrWEvjQ== X-Mailgun-Dkim: no X-Mailgun-Dkim: no From: Yodel Eldar To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Stefano Garzarella , Paolo Bonzini , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Thomas Huth , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Yodel Eldar Subject: [PATCH v4 3/3] contrib/vhost-user-bridge: Add UDP receive hexdump Date: Thu, 29 Jan 2026 07:30:49 -0600 Message-ID: <20260129133049.119829-4-yodel.eldar@yodel.dev> In-Reply-To: <20260129133049.119829-1-yodel.eldar@yodel.dev> References: <20260129133049.119829-1-yodel.eldar@yodel.dev> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=204.220.184.57; envelope-from=bounce+0e9322.97607e-qemu-devel=nongnu.org@yodel.dev; helo=k57.kb8c70eb.use4.send.mailgun.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @yodel.dev) X-ZM-MESSAGEID: 1769693573106158500 vhost-user-bridge debug prints UDP TX hexdumps in its transmit handler, but does not for receives, even though they are beneficial for testing. Add an RX hexdump in the receive callback. To delineate between transmits and receives, also add a debug print indicating that the program is in the transmit handler. Reviewed-by: Marc-Andr=C3=A9 Lureau Signed-off-by: Yodel Eldar --- contrib/vhost-user-bridge/vhost-user-bridge.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/contrib/vhost-user-bridge/vhost-user-bridge.c b/contrib/vhost-= user-bridge/vhost-user-bridge.c index ce4c3426d3..3f0fd0fa49 100644 --- a/contrib/vhost-user-bridge/vhost-user-bridge.c +++ b/contrib/vhost-user-bridge/vhost-user-bridge.c @@ -179,6 +179,9 @@ vubr_handle_tx(VuDev *dev, int qidx) =20 assert(qidx % 2); =20 + DPRINT("\n\n *** IN UDP TRANSMIT HANDLER ***\n\n"); + DPRINT(" hdrlen =3D %d\n", hdrlen); + for (;;) { ssize_t ret; unsigned int out_num; @@ -333,6 +336,10 @@ vubr_backend_recv_cb(int sock, void *ctx) }; ret =3D RETRY_ON_EINTR(recvmsg(vubr->backend_udp_sock, &msg, 0)); =20 + if (ret > 0 && VHOST_USER_BRIDGE_DEBUG) { + iov_hexdump(sg, num, stderr, "RX:", ret); + } + if (i =3D=3D 0) { iov_restore_front(elem->in_sg, sg, hdrlen); } --=20 2.52.0