Blame libvirt-gobject/libvirt-gobject-domain-snapshot.c

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/*
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 * libvirt-gobject-domain_snapshot.c: libvirt glib integration
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 *
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 * Copyright (C) 2008 Daniel P. Berrange
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 * Copyright (C) 2010-2011 Red Hat, Inc.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library. If not, see
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 * <http://www.gnu.org/licenses/>.
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 *
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 * Author: Daniel P. Berrange <berrange@redhat.com>
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 */
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#include <config.h>
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#include <libvirt/virterror.h>
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#include <string.h>
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#include "libvirt-glib/libvirt-glib.h"
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#include "libvirt-gobject/libvirt-gobject.h"
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#include "libvirt-gobject-compat.h"
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#define GVIR_DOMAIN_SNAPSHOT_GET_PRIVATE(obj)                         \
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        (G_TYPE_INSTANCE_GET_PRIVATE((obj), GVIR_TYPE_DOMAIN_SNAPSHOT, GVirDomainSnapshotPrivate))
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struct _GVirDomainSnapshotPrivate
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{
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    virDomainSnapshotPtr handle;
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};
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G_DEFINE_TYPE_WITH_PRIVATE(GVirDomainSnapshot, gvir_domain_snapshot, G_TYPE_OBJECT);
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enum {
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    PROP_0,
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    PROP_HANDLE,
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};
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#define GVIR_DOMAIN_SNAPSHOT_ERROR gvir_domain_snapshot_error_quark()
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static GQuark
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gvir_domain_snapshot_error_quark(void)
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{
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    return g_quark_from_static_string("gvir-domain-snapshot");
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}
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static void gvir_domain_snapshot_get_property(GObject *object,
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                                              guint prop_id,
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                                              GValue *value,
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                                              GParamSpec *pspec)
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{
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    GVirDomainSnapshot *snapshot = GVIR_DOMAIN_SNAPSHOT(object);
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    GVirDomainSnapshotPrivate *priv = snapshot->priv;
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    switch (prop_id) {
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    case PROP_HANDLE:
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        g_value_set_boxed(value, priv->handle);
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        break;
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    default:
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        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
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    }
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}
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static void gvir_domain_snapshot_set_property(GObject *object,
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                                              guint prop_id,
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                                              const GValue *value,
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                                              GParamSpec *pspec)
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{
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    GVirDomainSnapshot *snapshot = GVIR_DOMAIN_SNAPSHOT(object);
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    GVirDomainSnapshotPrivate *priv = snapshot->priv;
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    switch (prop_id) {
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    case PROP_HANDLE:
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        if (priv->handle)
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            virDomainSnapshotFree(priv->handle);
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        priv->handle = g_value_dup_boxed(value);
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        break;
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    default:
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        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
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    }
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}
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static void gvir_domain_snapshot_finalize(GObject *object)
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{
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    GVirDomainSnapshot *snapshot = GVIR_DOMAIN_SNAPSHOT(object);
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    GVirDomainSnapshotPrivate *priv = snapshot->priv;
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    virDomainSnapshotFree(priv->handle);
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    G_OBJECT_CLASS(gvir_domain_snapshot_parent_class)->finalize(object);
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}
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static void gvir_domain_snapshot_class_init(GVirDomainSnapshotClass *klass)
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{
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    GObjectClass *object_class = G_OBJECT_CLASS (klass);
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    object_class->finalize = gvir_domain_snapshot_finalize;
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    object_class->get_property = gvir_domain_snapshot_get_property;
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    object_class->set_property = gvir_domain_snapshot_set_property;
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    g_object_class_install_property(object_class,
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                                    PROP_HANDLE,
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                                    g_param_spec_boxed("handle",
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                                                       "Handle",
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                                                       "The domain_snapshot handle",
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                                                       GVIR_TYPE_DOMAIN_SNAPSHOT_HANDLE,
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                                                       G_PARAM_READABLE |
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                                                       G_PARAM_WRITABLE |
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                                                       G_PARAM_CONSTRUCT_ONLY |
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                                                       G_PARAM_STATIC_STRINGS));
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}
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static void gvir_domain_snapshot_init(GVirDomainSnapshot *snapshot)
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{
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    snapshot->priv = GVIR_DOMAIN_SNAPSHOT_GET_PRIVATE(snapshot);
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}
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typedef struct virDomainSnapshot GVirDomainSnapshotHandle;
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static GVirDomainSnapshotHandle*
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gvir_domain_snapshot_handle_copy(GVirDomainSnapshotHandle *src)
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{
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    virDomainSnapshotRef((virDomainSnapshotPtr)src);
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    return src;
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}
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static void
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gvir_domain_snapshot_handle_free(GVirDomainSnapshotHandle *src)
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{
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    virDomainSnapshotFree((virDomainSnapshotPtr)src);
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}
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G_DEFINE_BOXED_TYPE(GVirDomainSnapshotHandle, gvir_domain_snapshot_handle,
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                    gvir_domain_snapshot_handle_copy, gvir_domain_snapshot_handle_free)
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const gchar *gvir_domain_snapshot_get_name(GVirDomainSnapshot *snapshot)
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{
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot), NULL);
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    GVirDomainSnapshotPrivate *priv = snapshot->priv;
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    const char *name;
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    if (!(name = virDomainSnapshotGetName(priv->handle))) {
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        gvir_warning("Failed to get domain_snapshot name on %p", priv->handle);
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        return NULL;
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    }
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    return name;
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}
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/**
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 * gvir_domain_snapshot_get_config:
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 * @snapshot: the domain_snapshot
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 * @flags: the flags
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 *
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 * Returns: (transfer full): the config. The returned object should be
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 * unreffed with g_object_unref() when no longer needed.
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 */
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GVirConfigDomainSnapshot *gvir_domain_snapshot_get_config
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                                (GVirDomainSnapshot *snapshot,
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                                 guint flags,
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                                 GError **err)
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{
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    GVirDomainSnapshotPrivate *priv;
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    gchar *xml;
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot), NULL);
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    g_return_val_if_fail(err == NULL || *err == NULL, NULL);
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    priv = snapshot->priv;
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    if (!(xml = virDomainSnapshotGetXMLDesc(priv->handle, flags))) {
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        gvir_set_error_literal(err, GVIR_DOMAIN_SNAPSHOT_ERROR,
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                               0,
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                               "Unable to get domain_snapshot XML config");
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        return NULL;
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    }
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    GVirConfigDomainSnapshot *conf = gvir_config_domain_snapshot_new_from_xml(xml, err);
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    free(xml);
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    return conf;
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}
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/**
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 * gvir_domain_snapshot_delete:
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 * @snapshot: The domain snapshot
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 * @flags: Bitwise or of #GVirDomainSnapshotDeleteFlags
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 * @error: (allow-none): Place-holder for error or NULL
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 *
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 * Returns: TRUE on success, FALSE otherwise
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 */
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gboolean gvir_domain_snapshot_delete (GVirDomainSnapshot *snapshot,
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                                      guint flags,
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                                      GError **error)
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{
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    GVirDomainSnapshotPrivate *priv;
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    int status;
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT (snapshot), FALSE);
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    g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
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    priv = snapshot->priv;
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    status = virDomainSnapshotDelete(priv->handle, flags);
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    if (status < 0) {
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        gvir_set_error(error, GVIR_DOMAIN_SNAPSHOT_ERROR, 0,
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                       "Unable to delete snapshot `%s'",
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                       gvir_domain_snapshot_get_name(snapshot));
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        return FALSE;
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    }
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    return TRUE;
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}
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static void _delete_async_thread(GTask *task,
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                                 gpointer source_object,
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                                 gpointer task_data,
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                                 GCancellable *cancellable G_GNUC_UNUSED)
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{
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    GError *error = NULL;
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    gboolean status;
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    status = gvir_domain_snapshot_delete(source_object,
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                                         GPOINTER_TO_UINT(task_data),
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                                         &error);
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    if (status)
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        g_task_return_boolean(task, TRUE);
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    else
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        g_task_return_error(task, error);
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}
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/**
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 * gvir_domain_snapshot_delete_async:
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 * @snapshot: A #GVirDomainSnapshot
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 * @flags: Bitwise-OR of #GVirDomainSnapshotDeleteFlags
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 * @cancellable: (allow-none) (transfer none): cancellation object
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 * @callback: (scope async): completion callback
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 * @user_data: (closure): opaque data for callback
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 */
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void gvir_domain_snapshot_delete_async(GVirDomainSnapshot *snapshot,
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                                       guint flags,
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                                       GCancellable *cancellable,
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                                       GAsyncReadyCallback callback,
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                                       gpointer user_data)
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{
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    GTask *task;
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    g_return_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot));
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    task = g_task_new(snapshot, cancellable, callback, user_data);
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    g_task_set_task_data(task, GUINT_TO_POINTER(flags), NULL);
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    g_task_run_in_thread(task, _delete_async_thread);
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    g_object_unref(task);
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}
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/**
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 * gvir_domain_snapshot_delete_finish:
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 * @snapshot: A #GVirDomainSnapshot
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 * @res: (transfer none): async method result
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 *
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 * Returns: %TRUE on success, %FALSE otherwise.
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 */
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gboolean gvir_domain_snapshot_delete_finish(GVirDomainSnapshot *snapshot,
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                                            GAsyncResult *res,
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                                            GError **error)
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{
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot), FALSE);
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    g_return_val_if_fail(g_task_is_valid(res, snapshot), FALSE);
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    return g_task_propagate_boolean(G_TASK(res), error);
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}
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/**
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 * gvir_domain_snapshot_get_is_current:
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 * @snapshot: The domain snapshot
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 * @flags: Currently unused, pass 0
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 * @is_current: (out): %TRUE if the given snapshot is the current snapshot
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 * of its domain, %FALSE otherwise.
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 * @error: (allow-none): Place-holder for error or %NULL
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 *
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 * Returns: %TRUE on success, %FALSE otherwise.
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 */
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gboolean gvir_domain_snapshot_get_is_current(GVirDomainSnapshot *snapshot,
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                                             guint flags,
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                                             gboolean *is_current,
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                                             GError **error)
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{
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    gint status;
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot), FALSE);
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    g_return_val_if_fail(is_current != NULL, FALSE);
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    g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
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    status = virDomainSnapshotIsCurrent(snapshot->priv->handle, flags);
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    if (status == -1) {
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        gvir_set_error(error, GVIR_DOMAIN_SNAPSHOT_ERROR, 0,
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                       "Could not determine if `%s' is the current snapshot",
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                       gvir_domain_snapshot_get_name(snapshot));
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        return FALSE;
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    }
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    *is_current = status;
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    return TRUE;
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}
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/**
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 * gvir_domain_snapshot_revert_to:
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 * @snapshot: The domain snapshot
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 * @flags: Bitwise OR of GVirDomainSnapshotRevertFlags
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 * @error: (allow-none): Place-holder for error or NULL
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 *
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 * Returns: TRUE if the snapshot's domain has successfully been
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 * reverted to the given snapshot, FALSE otherwise, in which case
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 * @error will be set.
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 */
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gboolean gvir_domain_snapshot_revert_to(GVirDomainSnapshot *snapshot,
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                                        guint flags,
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                                        GError **error)
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{
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    int status;
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot), FALSE);
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    g_return_val_if_fail((error == NULL) || (*error == NULL), FALSE);
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    status = virDomainRevertToSnapshot(snapshot->priv->handle,
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                                       flags);
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    if (status != 0) {
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        gvir_set_error(error, GVIR_DOMAIN_SNAPSHOT_ERROR,
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                       0, "Failed to revert to snapshot `%s'",
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                       gvir_domain_snapshot_get_name(snapshot));
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        return FALSE;
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    }
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    return TRUE;
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}
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static void _revert_to_async_thread(GTask *task,
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                                    gpointer source_object,
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                                    gpointer task_data,
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                                    GCancellable *cancellable G_GNUC_UNUSED)
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{
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    GError *error = NULL;
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    gboolean status;
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    status = gvir_domain_snapshot_revert_to(source_object,
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                                            GPOINTER_TO_UINT(task_data),
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                                            &error);
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    if (status)
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        g_task_return_boolean(task, TRUE);
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    else
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        g_task_return_error(task, error);
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}
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/**
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 * gvir_domain_snapshot_revert_to_async:
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 * @snapshot: A #GVirDomainSnapshot
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 * @flags: Bitwise OR of #GVirDomainSnapshotRevertFlags
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 * @cancellable: (allow-none) (transfer none): cancellation object
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 * @callback: (scope async): The callback
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 * @user_data: (closure): Opaque data for callback
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 */
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void gvir_domain_snapshot_revert_to_async(GVirDomainSnapshot *snapshot,
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                                          guint flags,
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                                          GCancellable *cancellable,
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                                          GAsyncReadyCallback callback,
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                                          gpointer user_data)
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{
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    GTask *task;
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    g_return_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot));
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    task = g_task_new(snapshot, cancellable, callback, user_data);
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    g_task_set_task_data(task, GUINT_TO_POINTER(flags), NULL);
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    g_task_run_in_thread(task, _revert_to_async_thread);
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    g_object_unref(task);
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}
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/**
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 * gvir_domain_snapshot_revert_to_finish:
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 * @snapshot: The domain snapshot
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 * @result: (transfer none): The result
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 *
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 * Returns: %TRUE on success, %FALSE otherwise.
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 */
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gboolean gvir_domain_snapshot_revert_to_finish(GVirDomainSnapshot *snapshot,
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                                               GAsyncResult *result,
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                                               GError **error)
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{
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot), FALSE);
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    g_return_val_if_fail(g_task_is_valid(result, snapshot), FALSE);
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    return g_task_propagate_boolean(G_TASK(result), error);
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}
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/**
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 * gvir_domain_snapshot_set_config:
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 * @snapshot: The domain snapshot
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 * @conf: The new config object
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 * @error: (allow-none): Place-holder for error or %NULL
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 *
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 * Updates the given snapshot's configuration according to the
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 * given GVirConfigDomainSnapshot.
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 *
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 * Returns: %TRUE if no error was reported, %FALSE otherwise.
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 */
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gboolean gvir_domain_snapshot_set_config(GVirDomainSnapshot *snapshot,
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                                         GVirConfigDomainSnapshot *conf,
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                                         GError **error)
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{
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    gchar *xml;
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    virConnectPtr conn;
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    virDomainSnapshotPtr handle;
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    virDomainPtr domain;
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    GVirDomainSnapshotPrivate *priv;
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    g_return_val_if_fail(GVIR_IS_DOMAIN_SNAPSHOT(snapshot), FALSE);
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    g_return_val_if_fail(GVIR_CONFIG_IS_DOMAIN_SNAPSHOT(conf), FALSE);
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    g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
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    priv = snapshot->priv;
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    handle = priv->handle;
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    domain = virDomainSnapshotGetDomain(handle);
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    if ((conn = virDomainSnapshotGetConnect(priv->handle)) == NULL) {
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        gvir_set_error_literal(error, GVIR_DOMAIN_SNAPSHOT_ERROR,
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                               0,
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                               "Failed to get domain connection");
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        return FALSE;
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    }
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    /* XXX Changing the name will create a new snapshot */
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    if (g_strcmp0 (gvir_domain_snapshot_get_name(snapshot),
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                   gvir_config_domain_snapshot_get_name(conf)) != 0) {
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        gvir_set_error_literal(error, GVIR_DOMAIN_SNAPSHOT_ERROR,
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                               0,
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                               "Cannot set config: snapshot names don't match");
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        return FALSE;
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    }
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    xml = gvir_config_object_to_xml(GVIR_CONFIG_OBJECT(conf));
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    handle = virDomainSnapshotCreateXML(domain,
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                                        xml,
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                                        VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE);
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    g_free(xml);
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    if (handle == NULL) {
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        gvir_set_error(error, GVIR_DOMAIN_SNAPSHOT_ERROR,
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                       0,
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                       "Failed to create snapshot `%s' from XML definition",
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                       gvir_domain_snapshot_get_name(snapshot));
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        return FALSE;
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    }
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    virDomainSnapshotFree(handle);
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    return TRUE;
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}