From nobody Tue Feb 10 02:00:49 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 154323636078821.11719350586816; Mon, 26 Nov 2018 04:46:00 -0800 (PST) Received: from localhost ([::1]:35522 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gRGH1-0000GU-D8 for importer@patchew.org; Mon, 26 Nov 2018 07:45:59 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49483) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gRGF8-0007Y5-UT for qemu-devel@nongnu.org; Mon, 26 Nov 2018 07:44:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gRGF4-0007JL-Vp for qemu-devel@nongnu.org; Mon, 26 Nov 2018 07:44:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35904) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gRGF4-0007IW-R6 for qemu-devel@nongnu.org; Mon, 26 Nov 2018 07:43:58 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2DC27308FE92 for ; Mon, 26 Nov 2018 12:43:58 +0000 (UTC) Received: from localhost (ovpn-112-28.ams2.redhat.com [10.36.112.28]) by smtp.corp.redhat.com (Postfix) with ESMTP id 242DE608C3; Mon, 26 Nov 2018 12:43:49 +0000 (UTC) From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: qemu-devel@nongnu.org Date: Mon, 26 Nov 2018 16:42:42 +0400 Message-Id: <20181126124250.29985-4-marcandre.lureau@redhat.com> In-Reply-To: <20181126124250.29985-1-marcandre.lureau@redhat.com> References: <20181126124250.29985-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Mon, 26 Nov 2018 12:43:58 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH for-3.2 03/11] libvhost-user: exit by default on VHOST_USER_NONE X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Jens Freimann , kraxel@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Since commit 2566378d6d13bf4d28c7770bdbda5f7682594bbe, libvhost-user no longer panics on disconnect (rc =3D=3D 0), and instead silently ignores an invalid VHOST_USER_NONE message. Without extra work from the API user, this will simply busy-loop on HUP events. The obvious thing to do is to exit(0) instead, while additional or different work can be done by overriding iface->process_msg(). Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Jens Freimann --- contrib/libvhost-user/libvhost-user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/= libvhost-user.c index a6b46cdc03..41470daf57 100644 --- a/contrib/libvhost-user/libvhost-user.c +++ b/contrib/libvhost-user/libvhost-user.c @@ -1285,7 +1285,8 @@ vu_process_message(VuDev *dev, VhostUserMsg *vmsg) case VHOST_USER_SET_CONFIG: return vu_set_config(dev, vmsg); case VHOST_USER_NONE: - break; + /* if you need processing before exit, override iface->process_msg= */ + exit(0); case VHOST_USER_POSTCOPY_ADVISE: return vu_set_postcopy_advise(dev, vmsg); case VHOST_USER_POSTCOPY_LISTEN: --=20 2.20.0.rc1