From patchwork Thu Jun 6 14:30:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 1944697 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=Ndb2p4h+; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4Vw6GK0562z20KL for ; Fri, 7 Jun 2024 00:31:37 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sFE8N-0000zm-J1; Thu, 06 Jun 2024 10:30:31 -0400 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 1sFE8G-0000nw-I3 for qemu-devel@nongnu.org; Thu, 06 Jun 2024 10:30:25 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sFE8E-0000dm-Vi for qemu-devel@nongnu.org; Thu, 06 Jun 2024 10:30:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1717684222; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hDPgf6aEIIwBxTyK1XZbu26GI1zbXPnF25d6ETE9IBk=; b=Ndb2p4h+I3ufqR0cVXu2e4j6kZ17x96tc1+IW75RxV25gNcNHKAwq+sFC7R7pPuy7JJ2MP cN3cNeg0ccJTLsbOp8lXHIkjzd8hBkmev0BV/zaxJzZzSJIMcVFQ08oEsibVIltv5XiLYR vLQ+l/NISumL4T0XqLy4ilLGY99GABY= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-136-cdMmpptCM0Ojy8tAlhO9ZA-1; Thu, 06 Jun 2024 10:30:16 -0400 X-MC-Unique: cdMmpptCM0Ojy8tAlhO9ZA-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id ACB1B800074; Thu, 6 Jun 2024 14:30:16 +0000 (UTC) Received: from sirius.home.kraxel.org (unknown [10.39.192.217]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 49AF8492C27; Thu, 6 Jun 2024 14:30:16 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 1BA801800D65; Thu, 6 Jun 2024 16:30:11 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Gerd Hoffmann , Markus Armbruster , Eduardo Habkost , Eric Blake , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= Subject: [PATCH v3 4/4] qdev: add device policy [RfC] Date: Thu, 6 Jun 2024 16:30:10 +0200 Message-ID: <20240606143010.1318226-5-kraxel@redhat.com> In-Reply-To: <20240606143010.1318226-1-kraxel@redhat.com> References: <20240606143010.1318226-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 Received-SPF: pass client-ip=170.10.133.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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, DKIMWL_WL_HIGH=-0.001, 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_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Add policies for devices which are deprecated or not secure. There are three options: allow, warn and deny. It's implemented for devices only. Devices will probably be the main user of this. Also object_new() can't fail as of today so it's a bit hard to implement policy checking at object level, especially the 'deny' part of it. TODO: add a command line option to actually set these policies. Comments are welcome. Signed-off-by: Gerd Hoffmann --- hw/core/qdev.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 59 insertions(+), 1 deletion(-) diff --git a/hw/core/qdev.c b/hw/core/qdev.c index f3a996f57dee..0c4e5cec743c 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -43,6 +43,15 @@ static bool qdev_hot_added = false; bool qdev_hot_removed = false; +enum qdev_policy { + QDEV_ALLOW = 0, + QDEV_WARN = 1, + QDEV_DENY = 2, +}; + +static enum qdev_policy qdev_deprecated_policy; +static enum qdev_policy qdev_not_secure_policy; + const VMStateDescription *qdev_get_vmsd(DeviceState *dev) { DeviceClass *dc = DEVICE_GET_CLASS(dev); @@ -144,6 +153,43 @@ bool qdev_set_parent_bus(DeviceState *dev, BusState *bus, Error **errp) return true; } +static bool qdev_class_check(const char *name, ObjectClass *oc) +{ + bool allow = true; + + if (oc->deprecated) { + switch (qdev_deprecated_policy) { + case QDEV_WARN: + warn_report("device \"%s\" is deprecated", name); + break; + case QDEV_DENY: + error_report("device \"%s\" is deprecated", name); + allow = false; + break; + default: + /* nothing */ + break; + } + } + + if (oc->not_secure) { + switch (qdev_not_secure_policy) { + case QDEV_WARN: + warn_report("device \"%s\" is not secure", name); + break; + case QDEV_DENY: + error_report("device \"%s\" is not secure", name); + allow = false; + break; + default: + /* nothing */ + break; + } + } + + return allow; +} + DeviceState *qdev_new(const char *name) { ObjectClass *oc = object_class_by_name(name); @@ -162,14 +208,26 @@ DeviceState *qdev_new(const char *name) error_report("unknown type '%s'", name); abort(); } + + if (!qdev_class_check(name, oc)) { + exit(1); + } + return DEVICE(object_new(name)); } DeviceState *qdev_try_new(const char *name) { - if (!module_object_class_by_name(name)) { + ObjectClass *oc = module_object_class_by_name(name); + + if (!oc) { return NULL; } + + if (!qdev_class_check(name, oc)) { + return NULL; + } + return DEVICE(object_new(name)); }