From nobody Mon Feb 9 12:43:28 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of redhat.com designates 170.10.129.124 as permitted sender) client-ip=170.10.129.124; envelope-from=libvir-list-bounces@redhat.com; helo=us-smtp-delivery-124.mimecast.com; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1697563409; cv=none; d=zohomail.com; s=zohoarc; b=PFfDIYuDa0StKWIu5oVWOAqn0NmtddGimaJK622SnAVcdO9KH+9T6KQQl9ZYxxSoGV9X0oMuxQQtsbUSGVIifc5Gw00ZPrQczBnGPmeveqffibV++vgfzVBjEKkIxs+WyW5asurxS9vI0OH2irkjHCCI/aPs/JoE9tdnhLkiAl4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1697563409; 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=vWBpR0mzetbAWVgC55KfzPRrdPHnCLweEQqta5wUuEo=; b=HzGWHcMHaYGVy8IlzSZ2qUr+FLRZvi+senfBpIOcNgQyzQ+v9ffqQleZylT0mhJZtwdIDzTw6yISmozBED3pbujLqJYkmQTTupPkTZfI4aH3kXIp6nQCtJQwQB84p3TpXmA5Mtvnfv+2qg8siJbw8F8Zk+JzrmELjNyqUHntgAg= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mx.zohomail.com with SMTPS id 1697563409656317.74401918025035; Tue, 17 Oct 2023 10:23:29 -0700 (PDT) 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-609-uNLA-IkyPvuo79ZKSmw8-A-1; Tue, 17 Oct 2023 13:23:23 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0D61F85A5BD; Tue, 17 Oct 2023 17:23:20 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com [10.30.29.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id E946C8B1; Tue, 17 Oct 2023 17:23:19 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (localhost [IPv6:::1]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id C6C7919465B8; Tue, 17 Oct 2023 17:23:19 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id 9D29319465B3 for ; Tue, 17 Oct 2023 17:23:19 +0000 (UTC) Received: by smtp.corp.redhat.com (Postfix) id 8AECA492BF7; Tue, 17 Oct 2023 17:23:19 +0000 (UTC) Received: from secure.mitica (unknown [10.39.194.127]) by smtp.corp.redhat.com (Postfix) with ESMTP id 58FF0492BEE; Tue, 17 Oct 2023 17:23:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697563408; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=vWBpR0mzetbAWVgC55KfzPRrdPHnCLweEQqta5wUuEo=; b=cqe2p4SO8JmYXDyD4fTUfuRkFwhDYcNwPnOUdUu5igzKYnVQfEQsSzcnyyML1FtHOa5yRB Rth5Sh8HOLZj+/mjezMcBbY1AdVucs5c1ngudW7umA1NELlMgdbpKcvglgDPZ+WtC51IIv T7dSgGdZj/Ibc5Yrnt8z2Zadpk2XAgM= X-MC-Unique: uNLA-IkyPvuo79ZKSmw8-A-1 X-Original-To: libvir-list@listman.corp.redhat.com From: Juan Quintela To: qemu-devel@nongnu.org Subject: [PATCH v6 4/5] migration: Deprecate block migration Date: Tue, 17 Oct 2023 19:23:06 +0200 Message-ID: <20231017172307.22858-5-quintela@redhat.com> In-Reply-To: <20231017172307.22858-1-quintela@redhat.com> References: <20231017172307.22858-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Kevin Wolf , Fabiano Rosas , qemu-block@nongnu.org, Juan Quintela , libvir-list@redhat.com, Markus Armbruster , Peter Xu , Hanna Czenczek , Leonardo Bras , Stefan Hajnoczi , Eric Blake Errors-To: libvir-list-bounces@redhat.com Sender: "libvir-list" X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1697563410736100001 Content-Type: text/plain; charset="utf-8"; x-default="true" It is obsolete. It is better to use driver-mirror with NBD instead. CC: Kevin Wolf CC: Eric Blake CC: Stefan Hajnoczi CC: Hanna Czenczek Signed-off-by: Juan Quintela Acked-by: Stefan Hajnoczi Reviewed-by: Markus Armbruster --- docs/about/deprecated.rst | 10 ++++++++++ qapi/migration.json | 29 ++++++++++++++++++++++++----- migration/block.c | 3 +++ migration/options.c | 9 ++++++++- 4 files changed, 45 insertions(+), 6 deletions(-) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index 1312c563bb..a48591c049 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -479,3 +479,13 @@ As an intermediate step the ``blk`` functionality can = be achieved by setting the ``block`` migration capability to ``true``. But this capability is also deprecated. =20 +block migration (since 8.2) +''''''''''''''''''''''''''' + +Block migration is too inflexible. It needs to migrate all block +devices or none. + +Please see "QMP invocation for live storage migration with +``blockdev-mirror`` + NBD" in docs/interop/live-block-operations.rst +for a detailed explanation. + diff --git a/qapi/migration.json b/qapi/migration.json index 3765c2b662..e3b00a215b 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -269,11 +269,15 @@ # average memory load of the virtual CPU indirectly. Note that # zero means guest doesn't dirty memory. (Since 8.1) # +# Features: +# +# @deprecated: Member @disk is deprecated because block migration is. +# # Since: 0.14 ## { 'struct': 'MigrationInfo', 'data': {'*status': 'MigrationStatus', '*ram': 'MigrationStats', - '*disk': 'MigrationStats', + '*disk': { 'type': 'MigrationStats', 'features': [ 'deprecated'= ] }, '*vfio': 'VfioStats', '*xbzrle-cache': 'XBZRLECacheStats', '*total-time': 'int', @@ -525,6 +529,9 @@ # # Features: # +# @deprecated: Member @block is deprecated. Use blockdev-mirror with +# NBD instead. +# # @unstable: Members @x-colo and @x-ignore-shared are experimental. # # Since: 1.2 @@ -534,7 +541,8 @@ 'compress', 'events', 'postcopy-ram', { 'name': 'x-colo', 'features': [ 'unstable' ] }, 'release-ram', - 'block', 'return-path', 'pause-before-switchover', 'multifd', + { 'name': 'block', 'features': [ 'deprecated' ] }, + 'return-path', 'pause-before-switchover', 'multifd', 'dirty-bitmaps', 'postcopy-blocktime', 'late-block-activate', { 'name': 'x-ignore-shared', 'features': [ 'unstable' ] }, 'validate-uuid', 'background-snapshot', @@ -835,6 +843,9 @@ # # Features: # +# @deprecated: Member @block-incremental is deprecated. Use +# blockdev-mirror with NBD instead. +# # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period # are experimental. # @@ -850,7 +861,7 @@ 'tls-creds', 'tls-hostname', 'tls-authz', 'max-bandwidth', 'avail-switchover-bandwidth', 'downtime-limit', { 'name': 'x-checkpoint-delay', 'features': [ 'unstable' ] }, - 'block-incremental', + { 'name': 'block-incremental', 'features': [ 'deprecated' ] }, 'multifd-channels', 'xbzrle-cache-size', 'max-postcopy-bandwidth', 'max-cpu-throttle', 'multifd-compression', @@ -1011,6 +1022,9 @@ # # Features: # +# @deprecated: Member @block-incremental is deprecated. Use +# blockdev-mirror with NBD instead. +# # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period # are experimental. # @@ -1040,7 +1054,8 @@ '*downtime-limit': 'uint64', '*x-checkpoint-delay': { 'type': 'uint32', 'features': [ 'unstable' ] }, - '*block-incremental': 'bool', + '*block-incremental': { 'type': 'bool', + 'features': [ 'deprecated' ] }, '*multifd-channels': 'uint8', '*xbzrle-cache-size': 'size', '*max-postcopy-bandwidth': 'size', @@ -1225,6 +1240,9 @@ # # Features: # +# @deprecated: Member @block-incremental is deprecated. Use +# blockdev-mirror with NBD instead. +# # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period # are experimental. # @@ -1251,7 +1269,8 @@ '*downtime-limit': 'uint64', '*x-checkpoint-delay': { 'type': 'uint32', 'features': [ 'unstable' ] }, - '*block-incremental': 'bool', + '*block-incremental': { 'type': 'bool', + 'features': [ 'deprecated' ] }, '*multifd-channels': 'uint8', '*xbzrle-cache-size': 'size', '*max-postcopy-bandwidth': 'size', diff --git a/migration/block.c b/migration/block.c index b60698d6e2..acffe88f84 100644 --- a/migration/block.c +++ b/migration/block.c @@ -731,6 +731,9 @@ static int block_save_setup(QEMUFile *f, void *opaque) trace_migration_block_save("setup", block_mig_state.submitted, block_mig_state.transferred); =20 + warn_report("block migration is deprecated;" + " use blockdev-mirror with NBD instead"); + ret =3D init_blk_migration(f); if (ret < 0) { return ret; diff --git a/migration/options.c b/migration/options.c index 42fb818956..a753eae438 100644 --- a/migration/options.c +++ b/migration/options.c @@ -12,6 +12,7 @@ */ =20 #include "qemu/osdep.h" +#include "qemu/error-report.h" #include "exec/target_page.h" #include "qapi/clone-visitor.h" #include "qapi/error.h" @@ -473,10 +474,14 @@ bool migrate_caps_check(bool *old_caps, bool *new_cap= s, Error **errp) if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i)= " "block migration"); - error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); + error_append_hint(errp, "Use blockdev-mirror with NBD instead.\n"); return false; } #endif + if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { + warn_report("block migration is deprecated;" + " use blockdev-mirror with NBD instead"); + } =20 #ifndef CONFIG_REPLICATION if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { @@ -1386,6 +1391,8 @@ static void migrate_params_apply(MigrateSetParameters= *params, Error **errp) } =20 if (params->has_block_incremental) { + warn_report("block migration is deprecated;" + " use blockdev-mirror with NBD instead"); s->parameters.block_incremental =3D params->block_incremental; } if (params->has_multifd_channels) { --=20 2.41.0