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b93cc3bbc9
A bare 'except:' catches all exceptions [1], including SystemExit, KeyboardInterrupt, and GeneratorExit (which is not an error and should not normally be caught by user code). In situations where you need to catch all “normal” errors, you can catch the base class for all normal exceptions, Exception [2]. [1] https://docs.python.org/2/howto/doanddont.html#except [2] https://docs.python.org/2/library/exceptions.html#Exception
670 lines
23 KiB
Python
670 lines
23 KiB
Python
#
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# Copyright (C) 2013-2014 Red Hat, Inc.
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# Copyright (C) 2013 Cole Robinson <crobinso@redhat.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program 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
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301 USA.
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#
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import datetime
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import glob
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import logging
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import os
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import StringIO
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from gi.repository import Gdk
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from gi.repository import GdkPixbuf
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from gi.repository import Gtk
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from gi.repository import Pango
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from virtinst import DomainSnapshot
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from virtinst import util
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from . import uiutil
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from .baseclass import vmmGObjectUI
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from .asyncjob import vmmAsyncJob
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mimemap = {
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"image/x-portable-pixmap": "ppm",
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"image/png": "png",
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}
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def _mime_to_ext(val, reverse=False):
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for m, e in mimemap.items():
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if val == m and not reverse:
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return e
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if val == e and reverse:
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return m
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logging.debug("Don't know how to convert %s=%s to %s",
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reverse and "extension" or "mime", val,
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reverse and "mime" or "extension")
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class vmmSnapshotPage(vmmGObjectUI):
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def __init__(self, vm, builder, topwin):
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vmmGObjectUI.__init__(self, "snapshots.ui",
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None, builder=builder, topwin=topwin)
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self.vm = vm
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self._initial_populate = False
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self._unapplied_changes = False
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self._snapmenu = None
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self._init_ui()
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self._snapshot_new = self.widget("snapshot-new")
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self._snapshot_new.set_transient_for(self.topwin)
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self.bind_escape_key_close_helper(self._snapshot_new,
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self._snapshot_new_close)
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self.builder.connect_signals({
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"on_snapshot_add_clicked": self._on_add_clicked,
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"on_snapshot_delete_clicked": self._on_delete_clicked,
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"on_snapshot_start_clicked": self._on_start_clicked,
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"on_snapshot_apply_clicked": self._on_apply_clicked,
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"on_snapshot_list_changed": self._snapshot_selected,
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"on_snapshot_list_button_press_event": self._popup_snapshot_menu,
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"on_snapshot_refresh_clicked": self._refresh_snapshots,
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"on_snapshot_list_row_activated": self._on_start_clicked,
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# 'Create' dialog
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"on_snapshot_new_delete_event": self._snapshot_new_close,
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"on_snapshot_new_ok_clicked": self._on_new_ok_clicked,
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"on_snapshot_new_cancel_clicked" : self._snapshot_new_close,
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"on_snapshot_new_name_changed" : self._snapshot_new_name_changed,
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"on_snapshot_new_name_activate": self._on_new_ok_clicked,
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})
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self.top_box = self.widget("snapshot-top-box")
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self.widget("snapshot-top-window").remove(self.top_box)
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selection = self.widget("snapshot-list").get_selection()
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selection.emit("changed")
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selection.set_mode(Gtk.SelectionMode.MULTIPLE)
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selection.set_select_function(self._confirm_changes, None)
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##############
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# Init stuff #
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##############
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def _cleanup(self):
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self.vm = None
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self._snapshot_new.destroy()
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self._snapshot_new = None
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def _init_ui(self):
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# pylint: disable=redefined-variable-type
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blue = Gdk.color_parse("#0072A8")
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self.widget("header").modify_bg(Gtk.StateType.NORMAL, blue)
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self.widget("snapshot-notebook").set_show_tabs(False)
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buf = Gtk.TextBuffer()
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buf.connect("changed", self._description_changed)
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self.widget("snapshot-description").set_buffer(buf)
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buf = Gtk.TextBuffer()
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self.widget("snapshot-new-description").set_buffer(buf)
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# [name, row label, tooltip, icon name, sortname, current]
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model = Gtk.ListStore(str, str, str, str, str, bool)
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model.set_sort_column_id(4, Gtk.SortType.ASCENDING)
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col = Gtk.TreeViewColumn("")
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col.set_min_width(150)
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col.set_spacing(6)
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img = Gtk.CellRendererPixbuf()
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img.set_property("stock-size", Gtk.IconSize.LARGE_TOOLBAR)
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col.pack_start(img, False)
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col.add_attribute(img, 'icon-name', 3)
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txt = Gtk.CellRendererText()
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txt.set_property("ellipsize", Pango.EllipsizeMode.END)
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col.pack_start(txt, False)
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col.add_attribute(txt, 'markup', 1)
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img = Gtk.CellRendererPixbuf()
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img.set_property("stock-size", Gtk.IconSize.MENU)
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img.set_property("icon-name", Gtk.STOCK_APPLY)
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img.set_property("xalign", 0.0)
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col.pack_start(img, False)
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col.add_attribute(img, "visible", 5)
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def _sep_cb(_model, _iter, ignore):
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return not bool(_model[_iter][0])
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slist = self.widget("snapshot-list")
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slist.set_model(model)
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slist.set_tooltip_column(2)
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slist.append_column(col)
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slist.set_row_separator_func(_sep_cb, None)
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# Snapshot popup menu
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menu = Gtk.Menu()
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item = Gtk.ImageMenuItem.new_with_label(_("_Start snapshot"))
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item.set_use_underline(True)
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img = Gtk.Image()
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img.set_from_stock(Gtk.STOCK_MEDIA_PLAY, Gtk.IconSize.MENU)
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item.set_image(img)
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item.show()
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item.connect("activate", self._on_start_clicked)
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menu.add(item)
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item = Gtk.ImageMenuItem.new_with_label(_("_Delete snapshot"))
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item.set_use_underline(True)
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img = Gtk.Image()
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img.set_from_stock(Gtk.STOCK_DELETE, Gtk.IconSize.MENU)
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item.set_image(img)
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item.show()
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item.connect("activate", self._on_delete_clicked)
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menu.add(item)
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self._snapmenu = menu
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###################
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# Functional bits #
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###################
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def _get_selected_snapshots(self):
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selection = self.widget("snapshot-list").get_selection()
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def add_snap(treemodel, path, it, snaps):
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ignore = path
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try:
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name = treemodel[it][0]
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for snap in self.vm.list_snapshots():
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if name == snap.get_name():
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snaps.append(snap)
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except Exception:
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pass
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snaps = []
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selection.selected_foreach(add_snap, snaps)
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return snaps
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def _refresh_snapshots(self, select_name=None):
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self.vm.refresh_snapshots()
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self._populate_snapshot_list(select_name)
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def show_page(self):
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if not self._initial_populate:
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self._populate_snapshot_list()
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def _set_error_page(self, msg):
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self._set_snapshot_state(None)
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self.widget("snapshot-notebook").set_current_page(1)
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self.widget("snapshot-error-label").set_text(msg)
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def _populate_snapshot_list(self, select_name=None):
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cursnaps = []
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for i in self._get_selected_snapshots():
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cursnaps.append(i.get_name())
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model = self.widget("snapshot-list").get_model()
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model.clear()
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try:
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snapshots = self.vm.list_snapshots()
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except Exception as e:
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logging.exception(e)
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self._set_error_page(_("Error refreshing snapshot list: %s") %
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str(e))
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return
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has_external = False
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has_internal = False
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for snap in snapshots:
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desc = snap.get_xmlobj().description
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name = snap.get_name()
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state = snap.run_status()
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if snap.is_external():
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has_external = True
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sortname = "3%s" % name
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external = " (%s)" % _("External")
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else:
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has_internal = True
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external = ""
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sortname = "1%s" % name
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label = "%s\n<span size='small'>%s: %s%s</span>" % (
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(util.xml_escape(name), _("VM State"),
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util.xml_escape(state), external))
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model.append([name, label, desc, snap.run_status_icon_name(),
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sortname, snap.is_current()])
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if has_internal and has_external:
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model.append([None, None, None, None, "2", False])
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def check_selection(treemodel, path, it, snaps):
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if select_name:
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if treemodel[it][0] == select_name:
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selection.select_path(path)
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elif treemodel[it][0] in snaps:
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selection.select_path(path)
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selection = self.widget("snapshot-list").get_selection()
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model = self.widget("snapshot-list").get_model()
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selection.unselect_all()
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model.foreach(check_selection, cursnaps)
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self._initial_populate = True
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def _make_screenshot_pixbuf(self, mime, sdata):
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loader = GdkPixbuf.PixbufLoader.new_with_mime_type(mime)
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loader.write(sdata)
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pixbuf = loader.get_pixbuf()
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loader.close()
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maxsize = 450
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def _scale(big, small, maxsize):
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if big <= maxsize:
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return big, small
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factor = float(maxsize) / float(big)
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return maxsize, int(factor * float(small))
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width = pixbuf.get_width()
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height = pixbuf.get_height()
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if width > height:
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width, height = _scale(width, height, maxsize)
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else:
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height, width = _scale(height, width, maxsize)
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return pixbuf.scale_simple(width, height,
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GdkPixbuf.InterpType.BILINEAR)
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def _read_screenshot_file(self, name):
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if not name:
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return
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cache_dir = self.vm.get_cache_dir()
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basename = os.path.join(cache_dir, "snap-screenshot-%s" % name)
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files = glob.glob(basename + ".*")
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if not files:
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return
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filename = files[0]
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mime = _mime_to_ext(os.path.splitext(filename)[1][1:], reverse=True)
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if not mime:
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return
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return self._make_screenshot_pixbuf(mime, open(filename, "rb").read())
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def _set_snapshot_state(self, snap=None):
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self.widget("snapshot-notebook").set_current_page(0)
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xmlobj = snap and snap.get_xmlobj() or None
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name = snap and xmlobj.name or ""
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desc = snap and xmlobj.description or ""
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state = snap and snap.run_status() or ""
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icon = snap and snap.run_status_icon_name() or None
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is_external = snap and snap.is_external() or False
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is_current = snap and snap.is_current() or False
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timestamp = ""
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if snap:
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timestamp = str(datetime.datetime.fromtimestamp(
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xmlobj.creationTime))
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title = ""
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if name:
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title = "<b>Snapshot '%s':</b>" % util.xml_escape(name)
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uiutil.set_grid_row_visible(
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self.widget("snapshot-is-current"), is_current)
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self.widget("snapshot-title").set_markup(title)
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self.widget("snapshot-timestamp").set_text(timestamp)
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self.widget("snapshot-description").get_buffer().set_text(desc)
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self.widget("snapshot-status-text").set_text(state)
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if icon:
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self.widget("snapshot-status-icon").set_from_icon_name(
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icon, Gtk.IconSize.BUTTON)
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uiutil.set_grid_row_visible(self.widget("snapshot-mode"),
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is_external)
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if is_external:
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is_mem = xmlobj.memory_type == "external"
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is_disk = [d.snapshot == "external" for d in xmlobj.disks]
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if is_mem and is_disk:
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mode = _("External disk and memory")
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elif is_mem:
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mode = _("External memory only")
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else:
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mode = _("External disk only")
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self.widget("snapshot-mode").set_text(mode)
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sn = self._read_screenshot_file(name)
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self.widget("snapshot-screenshot").set_visible(bool(sn))
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self.widget("snapshot-screenshot-label").set_visible(not bool(sn))
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if sn:
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self.widget("snapshot-screenshot").set_from_pixbuf(sn)
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self.widget("snapshot-add").set_sensitive(True)
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self.widget("snapshot-delete").set_sensitive(bool(snap))
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self.widget("snapshot-start").set_sensitive(bool(snap))
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self.widget("snapshot-apply").set_sensitive(False)
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self._unapplied_changes = False
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def _confirm_changes(self, sel, model, path, path_selected, user_data):
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ignore1 = sel
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ignore2 = path
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ignore3 = model
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ignore4 = user_data
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if not self._unapplied_changes or not path_selected:
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return True
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if self.err.chkbox_helper(
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self.config.get_confirm_unapplied,
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self.config.set_confirm_unapplied,
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text1=(_("There are unapplied changes. "
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"Would you like to apply them now?")),
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chktext=_("Don't warn me again."),
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default=False):
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self._apply()
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return True
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##################
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# 'New' handling #
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##################
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def _take_screenshot(self):
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stream = None
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try:
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stream = self.vm.conn.get_backend().newStream(0)
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screen = 0
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flags = 0
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mime = self.vm.get_backend().screenshot(stream, screen, flags)
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ret = StringIO.StringIO()
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def _write_cb(_stream, data, userdata):
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ignore = stream
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ignore = userdata
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ret.write(data)
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stream.recvAll(_write_cb, None)
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return mime, ret.getvalue()
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finally:
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try:
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if stream:
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stream.finish()
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except Exception:
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pass
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def _get_screenshot(self):
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if not self.vm.is_active():
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logging.debug("Skipping screenshot since VM is not active")
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return
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if not self.vm.get_graphics_devices():
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logging.debug("Skipping screenshot since VM has no graphics")
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return
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try:
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# Perform two screenshots, because qemu + qxl has a bug where
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# screenshot generally only shows the data from the previous
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# screenshot request:
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# https://bugs.launchpad.net/qemu/+bug/1314293
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self._take_screenshot()
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mime, sdata = self._take_screenshot()
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except Exception:
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logging.exception("Error taking screenshot")
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return
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ext = _mime_to_ext(mime)
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if not ext:
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return
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newpix = self._make_screenshot_pixbuf(mime, sdata)
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setattr(newpix, "vmm_mimetype", mime)
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setattr(newpix, "vmm_sndata", sdata)
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return newpix
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def _reset_new_state(self):
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collidelist = [s.get_xmlobj().name for s in self.vm.list_snapshots()]
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default_name = DomainSnapshot.find_free_name(
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self.vm.get_backend(), collidelist)
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self.widget("snapshot-new-name").set_text(default_name)
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self.widget("snapshot-new-name").emit("changed")
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self.widget("snapshot-new-description").get_buffer().set_text("")
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self.widget("snapshot-new-ok").grab_focus()
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self.widget("snapshot-new-status-text").set_text(self.vm.run_status())
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self.widget("snapshot-new-status-icon").set_from_icon_name(
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self.vm.run_status_icon_name(), Gtk.IconSize.BUTTON)
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sn = self._get_screenshot()
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uiutil.set_grid_row_visible(
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self.widget("snapshot-new-screenshot"), bool(sn))
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if sn:
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self.widget("snapshot-new-screenshot").set_from_pixbuf(sn)
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def _snapshot_new_name_changed(self, src):
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self.widget("snapshot-new-ok").set_sensitive(bool(src.get_text()))
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def _new_finish_cb(self, error, details, newname):
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self.reset_finish_cursor()
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if error is not None:
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error = _("Error creating snapshot: %s") % error
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self.err.show_err(error, details=details)
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return
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self._refresh_snapshots(newname)
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def _validate_new_snapshot(self):
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name = self.widget("snapshot-new-name").get_text()
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desc = self.widget("snapshot-new-description"
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).get_buffer().get_property("text")
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try:
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newsnap = DomainSnapshot(self.vm.conn.get_backend())
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newsnap.name = name
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newsnap.description = desc or None
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newsnap.validate()
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newsnap.get_xml_config()
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return newsnap
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except Exception as e:
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return self.err.val_err(_("Error validating snapshot: %s") % e)
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def _get_screenshot_data_for_save(self):
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snwidget = self.widget("snapshot-new-screenshot")
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if not snwidget.is_visible():
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return None, None
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sn = snwidget.get_pixbuf()
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|
if not sn:
|
|
return None, None
|
|
|
|
mime = getattr(sn, "vmm_mimetype", None)
|
|
sndata = getattr(sn, "vmm_sndata", None)
|
|
return mime, sndata
|
|
|
|
def _do_create_snapshot(self, asyncjob, xml, name, mime, sndata):
|
|
ignore = asyncjob
|
|
|
|
self.vm.create_snapshot(xml)
|
|
|
|
try:
|
|
cachedir = self.vm.get_cache_dir()
|
|
basesn = os.path.join(cachedir, "snap-screenshot-%s" % name)
|
|
|
|
# Remove any pre-existing screenshots so we don't show stale data
|
|
for ext in mimemap.values():
|
|
p = basesn + "." + ext
|
|
if os.path.exists(basesn + "." + ext):
|
|
os.unlink(p)
|
|
|
|
if not mime or not sndata:
|
|
return
|
|
|
|
filename = basesn + "." + _mime_to_ext(mime)
|
|
logging.debug("Writing screenshot to %s", filename)
|
|
open(filename, "wb").write(sndata)
|
|
except Exception:
|
|
logging.exception("Error saving screenshot")
|
|
|
|
def _create_new_snapshot(self):
|
|
snap = self._validate_new_snapshot()
|
|
if not snap:
|
|
return
|
|
|
|
xml = snap.get_xml_config()
|
|
name = snap.name
|
|
mime, sndata = self._get_screenshot_data_for_save()
|
|
self._snapshot_new_close()
|
|
|
|
self.set_finish_cursor()
|
|
progWin = vmmAsyncJob(
|
|
self._do_create_snapshot, [xml, name, mime, sndata],
|
|
self._new_finish_cb, [name],
|
|
_("Creating snapshot"),
|
|
_("Creating virtual machine snapshot"),
|
|
self.topwin)
|
|
progWin.run()
|
|
|
|
def _apply(self):
|
|
snaps = self._get_selected_snapshots()
|
|
if not snaps or len(snaps) > 1:
|
|
return False
|
|
|
|
snap = snaps[0]
|
|
desc_widget = self.widget("snapshot-description")
|
|
desc = desc_widget.get_buffer().get_property("text") or ""
|
|
|
|
xmlobj = snap.get_xmlobj()
|
|
origxml = xmlobj.get_xml_config()
|
|
xmlobj.description = desc
|
|
newxml = xmlobj.get_xml_config()
|
|
|
|
self.vm.log_redefine_xml_diff(snap, origxml, newxml)
|
|
if newxml == origxml:
|
|
return True
|
|
|
|
self.vm.create_snapshot(newxml, redefine=True)
|
|
snap.ensure_latest_xml()
|
|
return True
|
|
|
|
|
|
#############
|
|
# Listeners #
|
|
#############
|
|
|
|
def _popup_snapshot_menu(self, src, event):
|
|
ignore = src
|
|
if event.button != 3:
|
|
return
|
|
self._snapmenu.popup(None, None, None, None, 0, event.time)
|
|
|
|
def _snapshot_new_close(self, *args, **kwargs):
|
|
ignore = args
|
|
ignore = kwargs
|
|
self._snapshot_new.hide()
|
|
return 1
|
|
|
|
def _description_changed(self, ignore):
|
|
snaps = self._get_selected_snapshots()
|
|
desc_widget = self.widget("snapshot-description")
|
|
desc = desc_widget.get_buffer().get_property("text") or ""
|
|
|
|
if len(snaps) == 1 and snaps[0].get_xmlobj().description != desc:
|
|
self._unapplied_changes = True
|
|
|
|
self.widget("snapshot-apply").set_sensitive(True)
|
|
|
|
def _on_apply_clicked(self, ignore):
|
|
self._apply()
|
|
self._refresh_snapshots()
|
|
|
|
def _on_new_ok_clicked(self, ignore):
|
|
return self._create_new_snapshot()
|
|
|
|
def _on_add_clicked(self, ignore):
|
|
if self._snapshot_new.is_visible():
|
|
return
|
|
self._reset_new_state()
|
|
self._snapshot_new.show()
|
|
self.widget("snapshot-new-name").grab_focus()
|
|
|
|
def _on_start_clicked(self, ignore, ignore2=None, ignore3=None):
|
|
snaps = self._get_selected_snapshots()
|
|
if not snaps or len(snaps) > 1:
|
|
return
|
|
|
|
snap = snaps[0]
|
|
msg = _("Are you sure you want to run snapshot '%s'? "
|
|
"All %s changes since the last snapshot was created will be "
|
|
"discarded.")
|
|
if self.vm.is_active():
|
|
msg = msg % (snap.get_name(), _("disk"))
|
|
else:
|
|
msg = msg % (snap.get_name(), _("disk and configuration"))
|
|
|
|
result = self.err.yes_no(msg)
|
|
if not result:
|
|
return
|
|
|
|
logging.debug("Running snapshot '%s'", snap.get_name())
|
|
vmmAsyncJob.simple_async(self.vm.revert_to_snapshot,
|
|
[snap], self,
|
|
_("Running snapshot"),
|
|
_("Running snapshot '%s'") % snap.get_name(),
|
|
_("Error running snapshot '%s'") %
|
|
snap.get_name(),
|
|
finish_cb=self._refresh_snapshots)
|
|
|
|
def _on_delete_clicked(self, ignore):
|
|
snaps = self._get_selected_snapshots()
|
|
if not snaps:
|
|
return
|
|
|
|
result = self.err.yes_no(_("Are you sure you want to permanently "
|
|
"delete the selected snapshots?"))
|
|
if not result:
|
|
return
|
|
|
|
for snap in snaps:
|
|
logging.debug("Deleting snapshot '%s'", snap.get_name())
|
|
vmmAsyncJob.simple_async(snap.delete, [], self,
|
|
_("Deleting snapshot"),
|
|
_("Deleting snapshot '%s'") % snap.get_name(),
|
|
_("Error deleting snapshot '%s'") % snap.get_name(),
|
|
finish_cb=self._refresh_snapshots)
|
|
|
|
|
|
def _snapshot_selected(self, selection):
|
|
ignore = selection
|
|
snap = self._get_selected_snapshots()
|
|
if not snap:
|
|
self._set_error_page(_("No snapshot selected."))
|
|
return
|
|
if len(snap) > 1:
|
|
self._set_error_page(_("Multiple snapshots selected."))
|
|
self.widget("snapshot-start").set_sensitive(False)
|
|
self.widget("snapshot-apply").set_sensitive(False)
|
|
self.widget("snapshot-delete").set_sensitive(True)
|
|
return
|
|
|
|
try:
|
|
self._set_snapshot_state(snap[0])
|
|
except Exception as e:
|
|
logging.exception(e)
|
|
self._set_error_page(_("Error selecting snapshot: %s") % str(e))
|