From patchwork Mon Feb 8 11:29:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Dr. David Alan Gilbert" X-Patchwork-Id: 12076221 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=-16.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 E2002C433E9 for ; Mon, 8 Feb 2021 18:10:47 +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 71E0664E8A for ; Mon, 8 Feb 2021 18:10:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 71E0664E8A 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]:34442 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l9Azm-0003HG-Ao for qemu-devel@archiver.kernel.org; Mon, 08 Feb 2021 13:10:46 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:45532) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l94l5-00022P-1F for qemu-devel@nongnu.org; Mon, 08 Feb 2021 06:31:15 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:49255) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1l94kv-0002Zz-S7 for qemu-devel@nongnu.org; Mon, 08 Feb 2021 06:31:08 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612783859; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VMrCCbDugwu4pi6gCRkUC0fkqINGALuil5+FoIzvDGc=; b=WDEj+zKvsr9vgxJOCUDXw9E6y1atBP6JfnfhMKZca4bABpfrtuA3uXnNt2HmfQJkOdRadX hvwai+djcVvvf61XR92gE+y0M7KgCzZG1njv2dWWvzd/Bs+fWKBn0aBp/TKl8ewL9eVDd1 K1lBH+k1RplgNKmM0X8mhMn64D84DwA= 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-22-HgtJfrHdPy6Qh9jp1DAfkg-1; Mon, 08 Feb 2021 06:30:57 -0500 X-MC-Unique: HgtJfrHdPy6Qh9jp1DAfkg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 87A20804040; Mon, 8 Feb 2021 11:30:56 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-115-22.ams2.redhat.com [10.36.115.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 726DB1017CF6; Mon, 8 Feb 2021 11:30:50 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, andrey.gruzdev@virtuozzo.com, berrange@redhat.com, gaojinhao@huawei.com, armbru@redhat.com, mst@redhat.com, philmd@redhat.com, wainersm@redhat.com, s.reiter@proxmox.com Subject: [PULL 22/27] migration: wire up support for snapshot device selection Date: Mon, 8 Feb 2021 11:29:13 +0000 Message-Id: <20210208112918.185058-23-dgilbert@redhat.com> In-Reply-To: <20210208112918.185058-1-dgilbert@redhat.com> References: <20210208112918.185058-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.569, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: 2.1.23 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" From: Daniel P. Berrangé Modify load_snapshot/save_snapshot to accept the device list and vmstate node name parameters previously added to the block layer. Reviewed-by: Eric Blake Signed-off-by: Daniel P. Berrangé Message-Id: <20210204124834.774401-9-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert --- include/migration/snapshot.h | 18 ++++++++++++++++-- migration/savevm.c | 30 ++++++++++++++++++------------ monitor/hmp-cmds.c | 5 +++-- replay/replay-debugging.c | 4 ++-- replay/replay-snapshot.c | 5 +++-- softmmu/vl.c | 2 +- 6 files changed, 43 insertions(+), 21 deletions(-) diff --git a/include/migration/snapshot.h b/include/migration/snapshot.h index d8c22d343c..3bdbef435b 100644 --- a/include/migration/snapshot.h +++ b/include/migration/snapshot.h @@ -15,23 +15,37 @@ #ifndef QEMU_MIGRATION_SNAPSHOT_H #define QEMU_MIGRATION_SNAPSHOT_H +#include "qapi/qapi-builtin-types.h" + /** * save_snapshot: Save an internal snapshot. * @name: name of internal snapshot * @overwrite: replace existing snapshot with @name + * @vmstate: blockdev node name to store VM state in + * @has_devices: whether to use explicit device list + * @devices: explicit device list to snapshot * @errp: pointer to error object * On success, return %true. * On failure, store an error through @errp and return %false. */ -bool save_snapshot(const char *name, bool overwrite, Error **errp); +bool save_snapshot(const char *name, bool overwrite, + const char *vmstate, + bool has_devices, strList *devices, + Error **errp); /** * load_snapshot: Load an internal snapshot. * @name: name of internal snapshot + * @vmstate: blockdev node name to load VM state from + * @has_devices: whether to use explicit device list + * @devices: explicit device list to snapshot * @errp: pointer to error object * On success, return %true. * On failure, store an error through @errp and return %false. */ -bool load_snapshot(const char *name, Error **errp); +bool load_snapshot(const char *name, + const char *vmstate, + bool has_devices, strList *devices, + Error **errp); #endif diff --git a/migration/savevm.c b/migration/savevm.c index 0ae8e4798c..0b27a8c55a 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -43,6 +43,8 @@ #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" #include "qemu/error-report.h" #include "sysemu/cpus.h" @@ -2764,7 +2766,8 @@ int qemu_load_device_state(QEMUFile *f) return 0; } -bool save_snapshot(const char *name, bool overwrite, Error **errp) +bool save_snapshot(const char *name, bool overwrite, const char *vmstate, + bool has_devices, strList *devices, Error **errp) { BlockDriverState *bs; QEMUSnapshotInfo sn1, *sn = &sn1; @@ -2786,18 +2789,19 @@ bool save_snapshot(const char *name, bool overwrite, Error **errp) return false; } - if (!bdrv_all_can_snapshot(false, NULL, errp)) { + if (!bdrv_all_can_snapshot(has_devices, devices, errp)) { return false; } /* Delete old snapshots of the same name */ if (name) { if (overwrite) { - if (bdrv_all_delete_snapshot(name, false, NULL, errp) < 0) { + if (bdrv_all_delete_snapshot(name, has_devices, + devices, errp) < 0) { return false; } } else { - ret2 = bdrv_all_has_snapshot(name, false, NULL, errp); + ret2 = bdrv_all_has_snapshot(name, has_devices, devices, errp); if (ret2 < 0) { return false; } @@ -2810,7 +2814,7 @@ bool save_snapshot(const char *name, bool overwrite, Error **errp) } } - bs = bdrv_all_find_vmstate_bs(NULL, false, NULL, errp); + bs = bdrv_all_find_vmstate_bs(vmstate, has_devices, devices, errp); if (bs == NULL) { return false; } @@ -2875,9 +2879,10 @@ bool save_snapshot(const char *name, bool overwrite, Error **errp) aio_context_release(aio_context); aio_context = NULL; - ret = bdrv_all_create_snapshot(sn, bs, vm_state_size, false, NULL, errp); + ret = bdrv_all_create_snapshot(sn, bs, vm_state_size, + has_devices, devices, errp); if (ret < 0) { - bdrv_all_delete_snapshot(sn->name, false, NULL, NULL); + bdrv_all_delete_snapshot(sn->name, has_devices, devices, NULL); goto the_end; } @@ -2978,7 +2983,8 @@ void qmp_xen_load_devices_state(const char *filename, Error **errp) migration_incoming_state_destroy(); } -bool load_snapshot(const char *name, Error **errp) +bool load_snapshot(const char *name, const char *vmstate, + bool has_devices, strList *devices, Error **errp) { BlockDriverState *bs_vm_state; QEMUSnapshotInfo sn; @@ -2987,10 +2993,10 @@ bool load_snapshot(const char *name, Error **errp) AioContext *aio_context; MigrationIncomingState *mis = migration_incoming_get_current(); - if (!bdrv_all_can_snapshot(false, NULL, errp)) { + if (!bdrv_all_can_snapshot(has_devices, devices, errp)) { return false; } - ret = bdrv_all_has_snapshot(name, false, NULL, errp); + ret = bdrv_all_has_snapshot(name, has_devices, devices, errp); if (ret < 0) { return false; } @@ -3000,7 +3006,7 @@ bool load_snapshot(const char *name, Error **errp) return false; } - bs_vm_state = bdrv_all_find_vmstate_bs(NULL, false, NULL, errp); + bs_vm_state = bdrv_all_find_vmstate_bs(vmstate, has_devices, devices, errp); if (!bs_vm_state) { return false; } @@ -3027,7 +3033,7 @@ bool load_snapshot(const char *name, Error **errp) /* Flush all IO requests so they don't interfere with the new state. */ bdrv_drain_all_begin(); - ret = bdrv_all_goto_snapshot(name, false, NULL, errp); + ret = bdrv_all_goto_snapshot(name, has_devices, devices, errp); if (ret < 0) { goto err_drain; } diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index 1fff33f14a..15d4e039ac 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -1139,7 +1139,7 @@ void hmp_loadvm(Monitor *mon, const QDict *qdict) vm_stop(RUN_STATE_RESTORE_VM); - if (!load_snapshot(name, &err) && saved_vm_running) { + if (!load_snapshot(name, NULL, false, NULL, &err) && saved_vm_running) { vm_start(); } hmp_handle_error(mon, err); @@ -1149,7 +1149,8 @@ void hmp_savevm(Monitor *mon, const QDict *qdict) { Error *err = NULL; - save_snapshot(qdict_get_try_str(qdict, "name"), true, &err); + save_snapshot(qdict_get_try_str(qdict, "name"), + true, NULL, false, NULL, &err); hmp_handle_error(mon, err); } diff --git a/replay/replay-debugging.c b/replay/replay-debugging.c index 0ae6785b3b..1cde50e9f3 100644 --- a/replay/replay-debugging.c +++ b/replay/replay-debugging.c @@ -196,7 +196,7 @@ static void replay_seek(int64_t icount, QEMUTimerCB callback, Error **errp) if (icount < replay_get_current_icount() || replay_get_current_icount() < snapshot_icount) { vm_stop(RUN_STATE_RESTORE_VM); - load_snapshot(snapshot, errp); + load_snapshot(snapshot, NULL, false, NULL, errp); } g_free(snapshot); } @@ -327,7 +327,7 @@ void replay_gdb_attached(void) */ if (replay_mode == REPLAY_MODE_PLAY && !replay_snapshot) { - if (!save_snapshot("start_debugging", true, NULL)) { + if (!save_snapshot("start_debugging", true, NULL, false, NULL, NULL)) { /* Can't create the snapshot. Continue conventional debugging. */ } } diff --git a/replay/replay-snapshot.c b/replay/replay-snapshot.c index 31c5a8702b..e8767a1937 100644 --- a/replay/replay-snapshot.c +++ b/replay/replay-snapshot.c @@ -77,13 +77,14 @@ void replay_vmstate_init(void) if (replay_snapshot) { if (replay_mode == REPLAY_MODE_RECORD) { - if (!save_snapshot(replay_snapshot, true, &err)) { + if (!save_snapshot(replay_snapshot, + true, NULL, false, NULL, &err)) { error_report_err(err); error_report("Could not create snapshot for icount record"); exit(1); } } else if (replay_mode == REPLAY_MODE_PLAY) { - if (!load_snapshot(replay_snapshot, &err)) { + if (!load_snapshot(replay_snapshot, NULL, false, NULL, &err)) { error_report_err(err); error_report("Could not load snapshot for icount replay"); exit(1); diff --git a/softmmu/vl.c b/softmmu/vl.c index 2d6e658a06..58ed9be92f 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -2530,7 +2530,7 @@ void qmp_x_exit_preconfig(Error **errp) if (loadvm) { Error *local_err = NULL; - if (!load_snapshot(loadvm, &local_err)) { + if (!load_snapshot(loadvm, NULL, false, NULL, &local_err)) { error_report_err(local_err); autostart = 0; exit(1);