virt-manager/virtManager/clone.py

#
# Copyright (C) 2009 Red Hat, Inc.
# Copyright (C) 2009 Cole Robinson <crobinso@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
#

import logging
import os

# pylint: disable=E0611
from gi.repository import Gtk
from gi.repository import Gdk
# pylint: enable=E0611

from virtManager.baseclass import vmmGObjectUI
from virtManager.asyncjob import vmmAsyncJob
from virtManager.storagebrowse import vmmStorageBrowser

import virtinst
from virtinst import Cloner
from virtinst import VirtualNetworkInterface

STORAGE_COMBO_CLONE = 0
STORAGE_COMBO_SHARE = 1
STORAGE_COMBO_SEP = 2
STORAGE_COMBO_DETAILS = 3

STORAGE_INFO_ORIG_PATH = 0
STORAGE_INFO_NEW_PATH = 1
STORAGE_INFO_TARGET = 2
STORAGE_INFO_SIZE = 3
STORAGE_INFO_DEVTYPE = 4
STORAGE_INFO_DO_CLONE = 5
STORAGE_INFO_CAN_CLONE = 6
STORAGE_INFO_CAN_SHARE = 7
STORAGE_INFO_DO_DEFAULT = 8
STORAGE_INFO_DEFINFO = 9
STORAGE_INFO_FAILINFO = 10
STORAGE_INFO_COMBO = 11
STORAGE_INFO_MANUAL_PATH = 12

NETWORK_INFO_LABEL = 0
NETWORK_INFO_ORIG_MAC = 1
NETWORK_INFO_NEW_MAC = 2

# XXX: Some method to check all storage size
# XXX: What to do for cleanup if clone fails?
# XXX: Disable mouse scroll for combo boxes


def can_we_clone(conn, vol, path):
    """Is the passed path even clone-able"""
    ret = True
    msg = None

    if not path:
        msg = _("No storage to clone.")

    elif vol:
        # Managed storage
        if not conn.check_pool_support(
                vol.get_parent_pool().get_backend(),
                conn.SUPPORT_POOL_CREATEVOLFROM):
            if conn.is_remote() or not os.access(path, os.R_OK):
                msg = _("Connection does not support managed storage cloning.")
    else:
        is_dev = path.startswith("/dev")
        if conn.is_remote():
            msg = _("Cannot clone unmanaged remote storage.")
        elif not os.access(path, os.R_OK):
            if is_dev:
                msg = _("Block devices to clone must be libvirt\n"
                        "managed storage volumes.")
            else:
                msg = _("No write access to parent directory.")
        elif not os.path.exists(path):
            msg = _("Path does not exist.")

    if msg:
        ret = False

    return (ret, msg)


def do_we_default(conn, vol, path, ro, shared, devtype):
    """ Returns (do we clone by default?, info string if not)"""
    ignore = conn
    info = ""

    def append_str(str1, str2, delim=", "):
        if not str2:
            return str1
        if str1:
            str1 += delim
        str1 += str2
        return str1

    if (devtype == virtinst.VirtualDisk.DEVICE_CDROM or
        devtype == virtinst.VirtualDisk.DEVICE_FLOPPY):
        info = append_str(info, _("Removable"))

    if ro:
        info = append_str(info, _("Read Only"))
    elif not vol and path and not os.access(path, os.W_OK):
        info = append_str(info, _("No write access"))

    if shared:
        info = append_str(info, _("Shareable"))

    return (not info, info)


class vmmCloneVM(vmmGObjectUI):
    def __init__(self, orig_vm):
        vmmGObjectUI.__init__(self, "clone.ui", "vmm-clone")
        self.orig_vm = orig_vm

        self.conn = self.orig_vm.conn
        self.clone_design = None

        self.storage_list = {}
        self.target_list = []

        self.net_list = {}
        self.mac_list = []

        self.storage_browser = None

        self.change_mac = self.widget("vmm-change-mac")
        self.change_mac.set_transient_for(self.topwin)

        self.change_storage = self.widget("vmm-change-storage")
        self.change_storage.set_transient_for(self.topwin)

        self.builder.connect_signals({
            "on_clone_delete_event" : self.close,
            "on_clone_cancel_clicked" : self.close,
            "on_clone_ok_clicked" : self.finish,

            # Change mac dialog
            "on_vmm_change_mac_delete_event": self.change_mac_close,
            "on_change_mac_cancel_clicked" : self.change_mac_close,
            "on_change_mac_ok_clicked" : self.change_mac_finish,

            # Change storage dialog
            "on_vmm_change_storage_delete_event": self.change_storage_close,
            "on_change_storage_cancel_clicked" : self.change_storage_close,
            "on_change_storage_ok_clicked" : self.change_storage_finish,
            "on_change_storage_doclone_toggled" : self.change_storage_doclone_toggled,

            "on_change_storage_browse_clicked" : self.change_storage_browse,
        })
        self.bind_escape_key_close()

        self.set_initial_state()

    def show(self, parent):
        logging.debug("Showing clone wizard")
        self.reset_state()
        self.topwin.set_transient_for(parent)
        self.topwin.resize(1, 1)
        self.topwin.present()

    def close(self, ignore1=None, ignore2=None):
        logging.debug("Closing clone wizard")
        self.change_mac_close()
        self.change_storage_close()
        self.topwin.hide()

        self.orig_vm = None
        self.clone_design = None
        self.storage_list = {}
        self.target_list = []
        self.net_list = {}
        self.mac_list = []

        return 1

    def _cleanup(self):
        self.conn = None

        self.change_mac.destroy()
        self.change_mac = None

        self.change_storage.destroy()
        self.change_storage = None

        if self.storage_browser:
            self.storage_browser.cleanup()
            self.storage_browser = None

    def change_mac_close(self, ignore1=None, ignore2=None):
        self.change_mac.hide()
        return 1

    def change_storage_close(self, ignore1=None, ignore2=None):
        self.change_storage.hide()
        return 1


    # First time setup

    def set_initial_state(self):
        blue = Gdk.Color.parse("#0072A8")[1]
        self.widget("header").modify_bg(Gtk.StateType.NORMAL, blue)

        context = self.topwin.get_style_context()
        defcolor = context.get_background_color(Gtk.StateType.NORMAL)
        self.widget("storage-viewport").override_background_color(
                                                  Gtk.StateType.NORMAL,
                                                  defcolor)

    # Populate state
    def reset_state(self):
        self.widget("clone-cancel").grab_focus()

        # Populate default clone values
        self.setup_clone_info()

        cd = self.clone_design
        self.widget("clone-orig-name").set_text(cd.original_guest)
        self.widget("clone-new-name").set_text(cd.clone_name)

        # We need to determine which disks fail (and why).
        self.storage_list, self.target_list = self.check_all_storage()

        self.populate_storage_lists()
        self.populate_network_list()

        return

    def setup_clone_info(self):
        self.clone_design = self.build_new_clone_design()

    def build_new_clone_design(self, new_name=None):
        design = Cloner(self.conn.get_backend())
        design.original_guest = self.orig_vm.get_name()
        if not new_name:
            new_name = design.generate_clone_name()
        design.clone_name = new_name

        # Erase any clone_policy from the original design, so that we
        # get the entire device list.
        design.clone_policy = []
        return design

    def populate_network_list(self):
        net_box = self.widget("clone-network-box")
        for c in net_box.get_children():
            net_box.remove(c)
            c.destroy()

        self.net_list = {}
        self.mac_list = []

        def build_net_row(labelstr, origmac, newmac):

            label = Gtk.Label(label=labelstr + " (%s)" % origmac)
            label.set_alignment(0, .5)
            button = Gtk.Button(_("Details..."))
            button.connect("clicked", self.net_change_mac, origmac)

            hbox = Gtk.HBox()
            hbox.set_spacing(12)
            hbox.pack_start(label, True, True, 0)
            hbox.pack_end(button, False, False, False)
            hbox.show_all()
            net_box.pack_start(hbox, False, False, False)

            net_row = []
            net_row.insert(NETWORK_INFO_LABEL, labelstr)
            net_row.insert(NETWORK_INFO_ORIG_MAC, origmac)
            net_row.insert(NETWORK_INFO_NEW_MAC, newmac)
            self.net_list[origmac] = net_row
            self.mac_list.append(origmac)

        for net in self.orig_vm.get_network_devices():
            mac = net.macaddr
            net_dev = net.source
            net_type = net.type

            # Generate a new MAC
            newmac = VirtualNetworkInterface.generate_mac(
                    self.conn.get_backend())

            # [ interface type, device name, origmac, newmac, label ]
            if net_type == VirtualNetworkInterface.TYPE_USER:
                label = _("Usermode")

            elif net_type == VirtualNetworkInterface.TYPE_VIRTUAL:
                net = self.orig_vm.conn.get_net_by_name(net_dev)

                if net:
                    label = ""

                    desc = net.pretty_forward_mode()
                    label += "%s" % desc

                else:
                    label = (_("Virtual Network") +
                             (net_dev and " %s" % net_dev or ""))

            else:
                # 'bridge' or anything else
                label = (net_type.capitalize() +
                         (net_dev and (" %s" % net_dev) or ""))

            build_net_row(label, mac, newmac)

        no_net = bool(len(self.net_list.keys()) == 0)
        self.widget("clone-network-box").set_visible(not no_net)
        self.widget("clone-no-net").set_visible(no_net)

    def check_all_storage(self):
        """
        Determine which storage is cloneable, and which isn't
        """
        diskinfos = self.orig_vm.get_disk_devices()
        cd = self.clone_design

        storage_list = {}

        # We need to determine which disks fail (and why).
        all_targets = [d.target for d in diskinfos]

        for disk in diskinfos:
            force_target = disk.target
            path = disk.path
            ro = disk.read_only
            shared = disk.shareable
            devtype = disk.device

            size = None
            clone_path = None
            failinfo = ""
            definfo = ""

            storage_row = []
            storage_row.insert(STORAGE_INFO_ORIG_PATH, path or "-")
            storage_row.insert(STORAGE_INFO_NEW_PATH, clone_path)
            storage_row.insert(STORAGE_INFO_TARGET, force_target)
            storage_row.insert(STORAGE_INFO_SIZE, size)
            storage_row.insert(STORAGE_INFO_DEVTYPE, devtype)
            storage_row.insert(STORAGE_INFO_DO_CLONE, False)
            storage_row.insert(STORAGE_INFO_CAN_CLONE, False)
            storage_row.insert(STORAGE_INFO_CAN_SHARE, False)
            storage_row.insert(STORAGE_INFO_DO_DEFAULT, False)
            storage_row.insert(STORAGE_INFO_DEFINFO, definfo)
            storage_row.insert(STORAGE_INFO_FAILINFO, failinfo)
            storage_row.insert(STORAGE_INFO_COMBO, None)
            storage_row.insert(STORAGE_INFO_MANUAL_PATH, False)

            skip_targets = all_targets[:]
            skip_targets.remove(force_target)

            vol = self.conn.get_vol_by_path(path)
            default, definfo = do_we_default(self.conn, vol, path, ro, shared,
                                             devtype)

            def storage_add(failinfo=None):
                storage_row[STORAGE_INFO_DEFINFO] = definfo
                storage_row[STORAGE_INFO_DO_DEFAULT] = default
                storage_row[STORAGE_INFO_CAN_SHARE] = bool(definfo)
                if failinfo:
                    storage_row[STORAGE_INFO_FAILINFO] = failinfo
                    storage_row[STORAGE_INFO_DO_CLONE] = False

                storage_list[force_target] = storage_row

            # If origdisk is empty, deliberately make it fail
            if not path:
                storage_add(_("Nothing to clone."))
                continue

            try:
                cd.skip_target = skip_targets
                cd.setup_original()
            except Exception, e:
                logging.exception("Disk target '%s' caused clone error",
                                  force_target)
                storage_add(str(e))
                continue

            can_clone, cloneinfo = can_we_clone(self.conn, vol, path)
            if not can_clone:
                storage_add(cloneinfo)
                continue

            try:
                # Generate disk path, make sure that works
                clone_path = self.generate_clone_path_name(path)

                logging.debug("Original path: %s\nGenerated clone path: %s",
                              path, clone_path)

                cd.clone_paths = clone_path
                size = cd.original_disks[0].get_size()
            except Exception, e:
                logging.exception("Error setting generated path '%s'",
                                  clone_path)
                storage_add(str(e))

            storage_row[STORAGE_INFO_CAN_CLONE] = True
            storage_row[STORAGE_INFO_NEW_PATH] = clone_path
            storage_row[STORAGE_INFO_SIZE] = self.pretty_storage(size)
            storage_add()

        return storage_list, all_targets

    def generate_clone_path_name(self, origpath, newname=None):
        cd = self.clone_design
        if not newname:
            newname = cd.clone_name
        clone_path = cd.generate_clone_disk_path(origpath,
                                                 newname=newname)
        return clone_path

    def set_paths_from_clone_name(self):
        cd = self.clone_design
        newname = self.widget("clone-new-name").get_text()

        if not newname:
            return
        if cd.clone_name == newname:
            return

        for row in self.storage_list.values():
            origpath = row[STORAGE_INFO_ORIG_PATH]
            if row[STORAGE_INFO_MANUAL_PATH]:
                continue
            if not row[STORAGE_INFO_DO_CLONE]:
                return
            try:
                newpath = self.generate_clone_path_name(origpath, newname)
                row[STORAGE_INFO_NEW_PATH] = newpath
            except Exception, e:
                logging.debug("Generating new path from clone name failed: "
                              + str(e))

    def build_storage_entry(self, disk, storage_box):
        origpath = disk[STORAGE_INFO_ORIG_PATH]
        devtype = disk[STORAGE_INFO_DEVTYPE]
        size = disk[STORAGE_INFO_SIZE]
        can_clone = disk[STORAGE_INFO_CAN_CLONE]
        do_clone = disk[STORAGE_INFO_DO_CLONE]
        can_share = disk[STORAGE_INFO_CAN_SHARE]
        is_default = disk[STORAGE_INFO_DO_DEFAULT]
        definfo = disk[STORAGE_INFO_DEFINFO]
        failinfo = disk[STORAGE_INFO_FAILINFO]
        target = disk[STORAGE_INFO_TARGET]

        orig_name = self.orig_vm.get_name()

        disk_label = os.path.basename(origpath)
        info_label = None
        if not can_clone:
            info_label = Gtk.Label()
            info_label.set_alignment(0, .5)
            info_label.set_markup("<span size='small'>%s</span>" % failinfo)
        if not is_default:
            disk_label += (definfo and " (%s)" % definfo or "")

        # Build icon
        icon = Gtk.Image()
        if devtype == virtinst.VirtualDisk.DEVICE_FLOPPY:
            iconname = "media-floppy"
        elif devtype == virtinst.VirtualDisk.DEVICE_CDROM:
            iconname = "media-optical"
        else:
            iconname = "drive-harddisk"
        icon.set_from_icon_name(iconname, Gtk.IconSize.MENU)
        disk_name_label = Gtk.Label(label=disk_label)
        disk_name_label.set_alignment(0, .5)
        disk_name_box = Gtk.HBox(spacing=9)
        disk_name_box.pack_start(icon, False, False, 0)
        disk_name_box.pack_start(disk_name_label, True, True, 0)

        def sep_func(model, it, combo):
            ignore = combo
            return model[it][2]

        # [String, sensitive, is sep]
        model = Gtk.ListStore(str, bool, bool)
        option_combo = Gtk.ComboBox()
        option_combo.set_model(model)
        text = Gtk.CellRendererText()
        option_combo.pack_start(text, True)
        option_combo.add_attribute(text, "text", 0)
        option_combo.add_attribute(text, "sensitive", 1)
        option_combo.set_row_separator_func(sep_func, option_combo)
        option_combo.connect("changed", self.storage_combo_changed, target)

        vbox = Gtk.VBox(spacing=1)
        if can_clone or can_share:
            model.insert(STORAGE_COMBO_CLONE,
                         [(_("Clone this disk") +
                           (size and " (%s)" % size or "")),
                          can_clone, False])
            model.insert(STORAGE_COMBO_SHARE,
                         [_("Share disk with %s") % orig_name, can_share,
                          False])
            model.insert(STORAGE_COMBO_SEP, ["", False, True])
            model.insert(STORAGE_COMBO_DETAILS,
                         [_("Details..."), True, False])

            if (can_clone and is_default) or do_clone:
                option_combo.set_active(STORAGE_COMBO_CLONE)
            else:
                option_combo.set_active(STORAGE_COMBO_SHARE)
        else:
            model.insert(STORAGE_COMBO_CLONE,
                         [_("Storage cannot be shared or cloned."),
                         False, False])
            option_combo.set_active(STORAGE_COMBO_CLONE)

        vbox.pack_start(disk_name_box, False, False, 0)
        vbox.pack_start(option_combo, False, False, 0)
        if info_label:
            vbox.pack_start(info_label, False, False, 0)
        storage_box.pack_start(vbox, False, False, 0)

        disk[STORAGE_INFO_COMBO] = option_combo

    def populate_storage_lists(self):
        storage_box = self.widget("clone-storage-box")
        for c in storage_box.get_children():
            storage_box.remove(c)
            c.destroy()

        for target in self.target_list:
            disk = self.storage_list[target]
            self.build_storage_entry(disk, storage_box)

        num_c = min(len(self.target_list), 3)
        if num_c:
            scroll = self.widget("clone-storage-scroll")
            scroll.set_size_request(-1, 80 * num_c)
        storage_box.show_all()

        no_storage = not bool(len(self.target_list))
        self.widget("clone-storage-box").set_visible(not no_storage)
        self.widget("clone-no-storage-pass").set_visible(no_storage)

        skip_targets = []
        new_disks = []
        for target in self.target_list:
            do_clone = self.storage_list[target][STORAGE_INFO_DO_CLONE]
            new_path = self.storage_list[target][STORAGE_INFO_NEW_PATH]

            if do_clone:
                new_disks.append(new_path)
            else:
                skip_targets.append(target)

        self.clone_design.skip_target = skip_targets
        self.clone_design.clone_paths = new_disks

        # If any storage cannot be cloned or shared, don't allow cloning
        clone = True
        tooltip = ""
        for row in self.storage_list.values():
            can_clone = row[STORAGE_INFO_CAN_CLONE]
            can_share = row[STORAGE_INFO_CAN_SHARE]
            if not (can_clone or can_share):
                clone = False
                tooltip = _("One or more disks cannot be cloned or shared.")
                break

        ok_button = self.widget("clone-ok")
        ok_button.set_sensitive(clone)
        ok_button.set_tooltip_text(tooltip)

    def net_change_mac(self, ignore, origmac):
        row      = self.net_list[origmac]
        orig_mac = row[NETWORK_INFO_ORIG_MAC]
        new_mac  = row[NETWORK_INFO_NEW_MAC]
        typ = row[NETWORK_INFO_LABEL]

        self.widget("change-mac-orig").set_text(orig_mac)
        self.widget("change-mac-type").set_text(typ)
        self.widget("change-mac-new").set_text(new_mac)

        self.change_mac.show_all()

    def storage_combo_changed(self, src, target):
        idx = src.get_active()
        row = self.storage_list[target]

        if idx == STORAGE_COMBO_CLONE:
            row[STORAGE_INFO_DO_CLONE] = True
            return
        elif idx == STORAGE_COMBO_SHARE:
            row[STORAGE_INFO_DO_CLONE] = False
            return
        elif idx != STORAGE_COMBO_DETAILS:
            return

        do_clone = row[STORAGE_INFO_DO_CLONE]
        if do_clone:
            src.set_active(STORAGE_COMBO_CLONE)
        else:
            src.set_active(STORAGE_COMBO_SHARE)

        # Show storage
        row = self.storage_change_path(row)

    def change_storage_doclone_toggled(self, src):
        do_clone = src.get_active()

        self.widget("change-storage-new").set_sensitive(do_clone)
        self.widget("change-storage-browse").set_sensitive(do_clone)

    def storage_change_path(self, row):
        # If storage paths are dependent on manually entered clone name,
        # make sure they are up to date
        self.set_paths_from_clone_name()

        orig = row[STORAGE_INFO_ORIG_PATH]
        new  = row[STORAGE_INFO_NEW_PATH]
        tgt  = row[STORAGE_INFO_TARGET]
        size = row[STORAGE_INFO_SIZE]
        can_clone = row[STORAGE_INFO_CAN_CLONE]
        can_share = row[STORAGE_INFO_CAN_SHARE]
        do_clone = row[STORAGE_INFO_DO_CLONE]

        self.widget("change-storage-doclone").set_active(True)
        self.widget("change-storage-doclone").toggled()
        self.widget("change-storage-orig").set_text(orig)
        self.widget("change-storage-target").set_text(tgt)
        self.widget("change-storage-size").set_text(size or "-")
        self.widget("change-storage-doclone").set_active(do_clone)

        if can_clone:
            self.widget("change-storage-new").set_text(new or "")
        else:
            self.widget("change-storage-new").set_text("")
        self.widget("change-storage-doclone").set_sensitive(can_clone and
                                                            can_share)

        self.widget("vmm-change-storage").show_all()

    def set_orig_vm(self, new_orig):
        self.orig_vm = new_orig
        self.conn = self.orig_vm.conn

    def change_mac_finish(self, ignore):
        orig = self.widget("change-mac-orig").get_text()
        new = self.widget("change-mac-new").get_text()
        row = self.net_list[orig]

        try:
            ignore, msg = VirtualNetworkInterface.is_conflict_net(
                                self.conn.get_backend(), new)
            if msg:
                raise RuntimeError(msg)
            row[NETWORK_INFO_NEW_MAC] = new
        except Exception, e:
            self.err.show_err(_("Error changing MAC address: %s") % str(e))
            return

        self.change_mac_close()

    def change_storage_finish(self, ignore):
        target = self.widget("change-storage-target").get_text()
        row = self.storage_list[target]

        # Sync 'do clone' checkbox, and main dialog combo
        combo = row[STORAGE_INFO_COMBO]
        do_clone = self.widget("change-storage-doclone").get_active()
        if do_clone:
            combo.set_active(STORAGE_COMBO_CLONE)
        else:
            combo.set_active(STORAGE_COMBO_SHARE)

        row[STORAGE_INFO_DO_CLONE] = do_clone
        if not do_clone:
            self.change_storage_close()
            return

        new_path = self.widget("change-storage-new").get_text()

        if virtinst.VirtualDisk.path_exists(self.clone_design.conn,
                                            new_path):
            res = self.err.yes_no(_("Cloning will overwrite the existing "
                                    "file"),
                                    _("Using an existing image will overwrite "
                                      "the path during the clone process. Are "
                                      "you sure you want to use this path?"))
            if not res:
                return

        try:
            self.clone_design.clone_paths = new_path
            self.populate_storage_lists()
            row[STORAGE_INFO_NEW_PATH] = new_path
            row[STORAGE_INFO_MANUAL_PATH] = True
        except Exception, e:
            self.err.show_err(_("Error changing storage path: %s") % str(e))
            return

        self.change_storage_close()

    def pretty_storage(self, size):
        if not size:
            return ""
        return "%.1f GB" % float(size)

    # Listeners
    def validate(self):
        self.set_paths_from_clone_name()
        name = self.widget("clone-new-name").get_text()

        # Make another clone_design
        cd = self.build_new_clone_design(name)

        # Set MAC addresses
        clonemacs = []
        for mac in self.mac_list:
            row = self.net_list[mac]
            clonemacs.append(row[NETWORK_INFO_NEW_MAC])
        cd.clone_macs = clonemacs

        skip_targets = []
        new_paths = []
        warn_str = ""
        for target in self.target_list:
            path = self.storage_list[target][STORAGE_INFO_ORIG_PATH]
            new_path = self.storage_list[target][STORAGE_INFO_NEW_PATH]
            do_clone = self.storage_list[target][STORAGE_INFO_DO_CLONE]
            do_default = self.storage_list[target][STORAGE_INFO_DO_DEFAULT]

            if do_clone:
                new_paths.append(new_path)
            else:
                skip_targets.append(target)
                if not path or path == '-':
                    continue

                if not do_default:
                    continue

                warn_str += "%s: %s\n" % (target, path)

        cd.skip_target = skip_targets
        cd.setup_original()
        cd.clone_paths = new_paths

        if warn_str:
            res = self.err.ok_cancel(
                _("Skipping disks may cause data to be overwritten."),
                _("The following disk devices will not be cloned:\n\n%s\n"
                  "Running the new guest could overwrite data in these "
                  "disk images.")
                  % warn_str)

            if not res:
                return False

        cd.setup_clone()

        self.clone_design = cd
        return True

    def _finish_cb(self, error, details):
        self.topwin.set_sensitive(True)
        self.topwin.get_window().set_cursor(
            Gdk.Cursor.new(Gdk.CursorType.TOP_LEFT_ARROW))

        if error is not None:
            error = (_("Error creating virtual machine clone '%s': %s") %
                      (self.clone_design.clone_name, error))
            self.err.show_err(error, details=details)
        else:
            self.close()
            self.conn.schedule_priority_tick(pollvm=True)

    def finish(self, src_ignore):
        try:
            if not self.validate():
                return
        except Exception, e:
            self.err.show_err(_("Uncaught error validating input: %s") % str(e))
            return

        self.topwin.set_sensitive(False)
        self.topwin.get_window().set_cursor(
            Gdk.Cursor.new(Gdk.CursorType.WATCH))

        title = (_("Creating virtual machine clone '%s'") %
                 self.clone_design.clone_name)
        text = title
        if self.clone_design.clone_disks:
            text = title + _(" and selected storage (this may take a while)")

        progWin = vmmAsyncJob(self._async_clone, [], self._finish_cb, [],
                              title, text, self.topwin)
        progWin.run()

    def _async_clone(self, asyncjob):
        try:
            self.orig_vm.set_cloning(True)
            meter = asyncjob.get_meter()

            self.clone_design.setup()
            self.clone_design.start_duplicate(meter)
        finally:
            self.orig_vm.set_cloning(False)

    def change_storage_browse(self, ignore):
        def callback(src_ignore, txt):
            self.widget("change-storage-new").set_text(txt)

        if self.storage_browser is None:
            self.storage_browser = vmmStorageBrowser(self.conn)
            self.storage_browser.connect("storage-browse-finish", callback)

        self.storage_browser.show(self.topwin, self.conn)