From patchwork Tue Jan 17 11:22:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 13104521 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E8CE5C63797 for ; Tue, 17 Jan 2023 11:24:20 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pHk3U-0001ZZ-Ra; Tue, 17 Jan 2023 06:23:04 -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 1pHk3S-0001Z3-E7 for qemu-devel@nongnu.org; Tue, 17 Jan 2023 06:23:02 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pHk3Q-0002Na-QO for qemu-devel@nongnu.org; Tue, 17 Jan 2023 06:23:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1673954580; 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=oCJ3slvp7bnhXuRk98l8zSlwMA1qOZwOI/aRz6TNDeE=; b=iFiL1bAOUj86YA2zn1Y9iyoS91wYKlpDzC3Y2/hdQhnrAbmcSxEzpU8jXzS0djSmbVJwek GUTaqXYp/Hs7SZkiHiCGF4vhp6hJf/DhU7xlGS8XVSyBZrbp4Q/P8mIJOMdEsE07K5VXzU qhKVth4rGLExMe9gMgJE71/tzMJYtvw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-383-vQFRm4WtPWOtD56tb5Ah2A-1; Tue, 17 Jan 2023 06:22:56 -0500 X-MC-Unique: vQFRm4WtPWOtD56tb5Ah2A-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5A0FE85C6E0 for ; Tue, 17 Jan 2023 11:22:56 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.193.160]) by smtp.corp.redhat.com (Postfix) with ESMTP id 957337AE5; Tue, 17 Jan 2023 11:22:54 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Cc: David Hildenbrand , "Dr . David Alan Gilbert" , Juan Quintela , Peter Xu , "Michael S . Tsirkin" , Michal Privoznik Subject: [PATCH v5 2/8] migration/savevm: Prepare vmdesc json writer in qemu_savevm_state_setup() Date: Tue, 17 Jan 2023 12:22:43 +0100 Message-Id: <20230117112249.244096-3-david@redhat.com> In-Reply-To: <20230117112249.244096-1-david@redhat.com> References: <20230117112249.244096-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 Received-SPF: pass client-ip=170.10.129.124; envelope-from=david@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_H2=-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: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org ... and store it in the migration state. This is a preparation for storing selected vmds's already in qemu_savevm_state_setup(). Reviewed-by: Dr. David Alan Gilbert Signed-off-by: David Hildenbrand Reviewed-by: Juan Quintela --- migration/migration.c | 2 ++ migration/migration.h | 4 ++++ migration/savevm.c | 18 ++++++++++++------ 3 files changed, 18 insertions(+), 6 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index 52b5d39244..fcd2f20d7c 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1903,6 +1903,8 @@ static void migrate_fd_cleanup(MigrationState *s) g_free(s->hostname); s->hostname = NULL; + json_writer_free(s->vmdesc); + s->vmdesc = NULL; qemu_savevm_state_cleanup(); diff --git a/migration/migration.h b/migration/migration.h index ae4ffd3454..66511ce532 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -17,6 +17,7 @@ #include "exec/cpu-common.h" #include "hw/qdev-core.h" #include "qapi/qapi-types-migration.h" +#include "qapi/qmp/json-writer.h" #include "qemu/thread.h" #include "qemu/coroutine_int.h" #include "io/channel.h" @@ -366,6 +367,9 @@ struct MigrationState { * This save hostname when out-going migration starts */ char *hostname; + + /* QEMU_VM_VMDESCRIPTION content filled for all non-iterable devices. */ + JSONWriter *vmdesc; }; void migrate_set_state(int *state, int old_state, int new_state); diff --git a/migration/savevm.c b/migration/savevm.c index d8830297e4..ff2b8d0064 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -42,7 +42,6 @@ #include "postcopy-ram.h" #include "qapi/error.h" #include "qapi/qapi-commands-migration.h" -#include "qapi/qmp/json-writer.h" #include "qapi/clone-visitor.h" #include "qapi/qapi-builtin-visit.h" #include "qapi/qmp/qerror.h" @@ -1189,10 +1188,16 @@ bool qemu_savevm_state_guest_unplug_pending(void) void qemu_savevm_state_setup(QEMUFile *f) { + MigrationState *ms = migrate_get_current(); SaveStateEntry *se; Error *local_err = NULL; int ret; + ms->vmdesc = json_writer_new(false); + json_writer_start_object(ms->vmdesc, NULL); + json_writer_int64(ms->vmdesc, "page_size", qemu_target_page_size()); + json_writer_start_array(ms->vmdesc, "devices"); + trace_savevm_state_setup(); QTAILQ_FOREACH(se, &savevm_state.handlers, entry) { if (!se->ops || !se->ops->save_setup) { @@ -1390,15 +1395,12 @@ int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f, bool in_postcopy, bool inactivate_disks) { - g_autoptr(JSONWriter) vmdesc = NULL; + MigrationState *ms = migrate_get_current(); + JSONWriter *vmdesc = ms->vmdesc; int vmdesc_len; SaveStateEntry *se; int ret; - vmdesc = json_writer_new(false); - json_writer_start_object(vmdesc, NULL); - json_writer_int64(vmdesc, "page_size", qemu_target_page_size()); - json_writer_start_array(vmdesc, "devices"); QTAILQ_FOREACH(se, &savevm_state.handlers, entry) { ret = vmstate_save(f, se, vmdesc); if (ret) { @@ -1433,6 +1435,10 @@ int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f, qemu_put_buffer(f, (uint8_t *)json_writer_get(vmdesc), vmdesc_len); } + /* Free it now to detect any inconsistencies. */ + json_writer_free(vmdesc); + ms->vmdesc = NULL; + return 0; }