From patchwork Wed May 20 12:31:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 282294 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61EECC433E0 for ; Wed, 20 May 2020 12:38:49 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1C0E6207C4 for ; Wed, 20 May 2020 12:38:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="hqhFI9Sm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1C0E6207C4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:48396 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jbNzk-0000zJ-8L for qemu-devel@archiver.kernel.org; Wed, 20 May 2020 08:38:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40432) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jbNuY-0007FL-PK for qemu-devel@nongnu.org; Wed, 20 May 2020 08:33:26 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:39586 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jbNuX-0007bY-Li for qemu-devel@nongnu.org; Wed, 20 May 2020 08:33:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589978004; 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=I+ZlFMxa882dmleEltuskxDTf/G7ryNz4ecsDNQJbLM=; b=hqhFI9SmiYUJzcVAltMMdCE5Fc36/C0KVCvHjnU0j5nkjtSuKfoGwXUC74TC6lMFWtvY6b W7EJhYRQyrYHwrMMMjJbohX7UvVMA6TUA2TSoDT6LfVgC4Q8jE+zvKCDiYGOB4BfGmUcB8 iWwui7jciiRIMCVvvThjMTfSQKB+1v8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-259-P8aMNPIVNVi2FxUrxk6HFA-1; Wed, 20 May 2020 08:33:22 -0400 X-MC-Unique: P8aMNPIVNVi2FxUrxk6HFA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9E42E800688; Wed, 20 May 2020 12:33:21 +0000 (UTC) Received: from t480s.redhat.com (ovpn-113-76.ams2.redhat.com [10.36.113.76]) by smtp.corp.redhat.com (Postfix) with ESMTP id B7D576E9EA; Wed, 20 May 2020 12:33:19 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v2 18/19] virtio-mem: Migration sanity checks Date: Wed, 20 May 2020 14:31:51 +0200 Message-Id: <20200520123152.60527-19-david@redhat.com> In-Reply-To: <20200520123152.60527-1-david@redhat.com> References: <20200520123152.60527-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Received-SPF: pass client-ip=207.211.31.81; envelope-from=david@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/20 04:09:34 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , kvm@vger.kernel.org, "Michael S . Tsirkin" , David Hildenbrand , "Dr . David Alan Gilbert" , qemu-s390x@nongnu.org, Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We want to make sure that certain properties don't change during migration, especially to catch user errors in a nice way. Let's migrate a temporary structure and validate that the properties didn't change. Cc: "Michael S. Tsirkin" Cc: "Dr. David Alan Gilbert" Signed-off-by: David Hildenbrand --- hw/virtio/virtio-mem.c | 69 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c index 11c500960c..d863f336e8 100644 --- a/hw/virtio/virtio-mem.c +++ b/hw/virtio/virtio-mem.c @@ -511,12 +511,81 @@ static int virtio_mem_post_load(void *opaque, int version_id) return virtio_mem_restore_unplugged(VIRTIO_MEM(opaque)); } +typedef struct VirtIOMEMMigSanityChecks { + VirtIOMEM *parent; + uint64_t addr; + uint64_t region_size; + uint32_t block_size; + uint32_t node; +} VirtIOMEMMigSanityChecks; + +static int virtio_mem_mig_sanity_checks_pre_save(void *opaque) +{ + VirtIOMEMMigSanityChecks *tmp = opaque; + VirtIOMEM *vmem = tmp->parent; + + tmp->addr = vmem->addr; + tmp->region_size = memory_region_size(&vmem->memdev->mr); + tmp->block_size = vmem->block_size; + tmp->node = vmem->node; + return 0; +} + +static int virtio_mem_mig_sanity_checks_post_load(void *opaque, int version_id) +{ + VirtIOMEMMigSanityChecks *tmp = opaque; + VirtIOMEM *vmem = tmp->parent; + const uint64_t new_region_size = memory_region_size(&vmem->memdev->mr); + + if (tmp->addr != vmem->addr) { + error_report("Property '%s' changed from 0x%" PRIx64 " to 0x%" PRIx64, + VIRTIO_MEM_ADDR_PROP, tmp->addr, vmem->addr); + return -EINVAL; + } + /* + * Note: Preparation for resizeable memory regions. The maximum size + * of the memory region must not change during migration. + */ + if (tmp->region_size != new_region_size) { + error_report("region size changed from 0x%" PRIx64 " to 0x%" PRIx64, + tmp->region_size, new_region_size); + return -EINVAL; + } + if (tmp->block_size != vmem->block_size) { + error_report("Property '%s' changed from %0x" PRIx32 " to %0x" PRIx32, + VIRTIO_MEM_BLOCK_SIZE_PROP, tmp->block_size, + vmem->block_size); + return -EINVAL; + } + if (tmp->node != vmem->node) { + error_report("Property '%s' changed from %" PRIu32 " to %" PRIu32, + VIRTIO_MEM_NODE_PROP, tmp->node, vmem->node); + return -EINVAL; + } + return 0; +} + +static const VMStateDescription vmstate_virtio_mem_sanity_checks = { + .name = "virtio-mem-device/sanity-checks", + .pre_save = virtio_mem_mig_sanity_checks_pre_save, + .post_load = virtio_mem_mig_sanity_checks_post_load, + .fields = (VMStateField[]) { + VMSTATE_UINT64(addr, VirtIOMEMMigSanityChecks), + VMSTATE_UINT64(region_size, VirtIOMEMMigSanityChecks), + VMSTATE_UINT32(block_size, VirtIOMEMMigSanityChecks), + VMSTATE_UINT32(node, VirtIOMEMMigSanityChecks), + VMSTATE_END_OF_LIST(), + }, +}; + static const VMStateDescription vmstate_virtio_mem_device = { .name = "virtio-mem-device", .minimum_version_id = 1, .version_id = 1, .post_load = virtio_mem_post_load, .fields = (VMStateField[]) { + VMSTATE_WITH_TMP(VirtIOMEM, VirtIOMEMMigSanityChecks, + vmstate_virtio_mem_sanity_checks), VMSTATE_UINT64(usable_region_size, VirtIOMEM), VMSTATE_UINT64(size, VirtIOMEM), VMSTATE_UINT64(requested_size, VirtIOMEM),