From patchwork Fri Oct 13 10:47:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juan Quintela X-Patchwork-Id: 13420656 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 93F70CDB47E for ; Fri, 13 Oct 2023 10:49:38 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qrFjD-0006Ye-Ns; Fri, 13 Oct 2023 06:49:11 -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 1qrFjC-0006Pq-6s for qemu-devel@nongnu.org; Fri, 13 Oct 2023 06:49:10 -0400 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 1qrFjA-0007Nf-9V for qemu-devel@nongnu.org; Fri, 13 Oct 2023 06:49:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697194147; 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=VzdRJx5JZT4ZldUPEy6NAzPBmz6Sjor+sLnlxTw9/GQ=; b=hmFDG9waZNTruP7Su0rkBkfXcxm/KS2b99m9s9Pn3dXWNpCl1rWxoES65B/Mfih4tIUNUZ NyRJfKKc6bFGGkh9KkofkwHXOCYvzA6h1Z9vG5mDD1IWB0kI5BgzjA/Mqmv030AOBloFGR 6OS2w0+pAKFEYCmRDZOGgqfYDE7ZNgg= 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-690-G-MdzQ4TOE-WxsyCpeqCbg-1; Fri, 13 Oct 2023 06:47:57 -0400 X-MC-Unique: G-MdzQ4TOE-WxsyCpeqCbg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (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 EEF8F81DA88; Fri, 13 Oct 2023 10:47:56 +0000 (UTC) Received: from secure.mitica (unknown [10.39.195.75]) by smtp.corp.redhat.com (Postfix) with ESMTP id BFC102156701; Fri, 13 Oct 2023 10:47:53 +0000 (UTC) From: Juan Quintela To: qemu-devel@nongnu.org Cc: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Fam Zheng , Markus Armbruster , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Eric Blake , libvir-list@redhat.com, Fabiano Rosas , qemu-block@nongnu.org, Peter Xu , Leonardo Bras , "Dr. David Alan Gilbert" , =?utf-8?q?Philippe_Mathieu-Dau?= =?utf-8?q?d=C3=A9?= , Stefan Hajnoczi , Thomas Huth , Hailiang Zhang , Paolo Bonzini , Juan Quintela , Kevin Wolf , Hanna Czenczek Subject: [PATCH v4 05/10] migration: Deprecate block migration Date: Fri, 13 Oct 2023 12:47:31 +0200 Message-ID: <20231013104736.31722-6-quintela@redhat.com> In-Reply-To: <20231013104736.31722-1-quintela@redhat.com> References: <20231013104736.31722-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Received-SPF: pass client-ip=170.10.129.124; envelope-from=quintela@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 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 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 --- 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 e6928b96cf..6490925cdc 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -466,3 +466,13 @@ The new way to modify migration is using migration parameters. ``blk`` functionality can be achieved by setting the ``block`` migration capability to ``true``. +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 64ebced761..5e545d10c0 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', @@ -825,6 +833,9 @@ # # 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. # @@ -840,7 +851,7 @@ 'tls-creds', 'tls-hostname', 'tls-authz', 'max-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', @@ -991,6 +1002,9 @@ # # 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. # @@ -1019,7 +1033,8 @@ '*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', @@ -1194,6 +1209,9 @@ # # 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. # @@ -1219,7 +1237,8 @@ '*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 5f930870a5..7f563c70f6 100644 --- a/migration/block.c +++ b/migration/block.c @@ -729,6 +729,9 @@ static int block_save_setup(QEMUFile *f, void *opaque) trace_migration_block_save("setup", block_mig_state.submitted, block_mig_state.transferred); + warn_report("block migration is deprecated. Use blockdev-mirror with" + "NBD instead."); + qemu_mutex_lock_iothread(); ret = init_blk_migration(f); if (ret < 0) { diff --git a/migration/options.c b/migration/options.c index 6bbfd4853d..bb6005052f 100644 --- a/migration/options.c +++ b/migration/options.c @@ -12,6 +12,7 @@ */ #include "qemu/osdep.h" +#include "qemu/error-report.h" #include "exec/target_page.h" #include "qapi/clone-visitor.h" #include "qapi/error.h" @@ -464,10 +465,14 @@ bool migrate_caps_check(bool *old_caps, bool *new_caps, 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."); + } #ifndef CONFIG_REPLICATION if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { @@ -1351,6 +1356,8 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp) } if (params->has_block_incremental) { + warn_report("Block migration is deprecated. " + "Use blockdev-mirror with NBD instead."); s->parameters.block_incremental = params->block_incremental; } if (params->has_multifd_channels) {