''' Implements the targetcli root UI. This file is part of targetcli. Copyright (c) 2011-2013 by Datera, Inc Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ''' from datetime import datetime from glob import glob import os import re import shutil import stat import filecmp from configshell_fb import ExecutionError from rtslib_fb import RTSRoot from rtslib_fb.utils import ignored from .ui_backstore import complete_path, UIBackstores from .ui_node import UINode from .ui_target import UIFabricModule default_save_file = "/etc/rtslib-fb-target/saveconfig.json" universal_prefs_file = "/etc/rtslib-fb-target/targetcli.conf" class UIRoot(UINode): ''' The targetcli hierarchy root node. ''' def __init__(self, shell, as_root=False): UINode.__init__(self, '/', shell=shell) self.as_root = as_root self.rtsroot = RTSRoot() def refresh(self): ''' Refreshes the tree of target fabric modules. ''' self._children = set([]) # Invalidate any rtslib caches if 'invalidate_caches' in dir(RTSRoot): self.rtsroot.invalidate_caches() UIBackstores(self) # only show fabrics present in the system for fm in self.rtsroot.fabric_modules: if fm.wwns == None or any(fm.wwns): UIFabricModule(fm, self) def ui_command_saveconfig(self, savefile=default_save_file): ''' Saves the current configuration to a file so that it can be restored on next boot. ''' self.assert_root() savefile = os.path.expanduser(savefile) # Only save backups if saving to default location if savefile == default_save_file: backup_dir = os.path.dirname(savefile) + "/backup" backup_name = "saveconfig-" + \ datetime.now().strftime("%Y%m%d-%H:%M:%S") + ".json" backupfile = backup_dir + "/" + backup_name backup_error = None if not os.path.exists(backup_dir): try: os.makedirs(backup_dir); except OSError as exe: raise ExecutionError("Cannot create backup directory [%s] %s." % (backup_dir, exc.strerror)) # Only save backups if savefile exits if os.path.exists(savefile): backed_files_list = sorted(glob(os.path.dirname(savefile) + "/backup/*.json")) # Save backup if 1. backup dir is empty, or 2. savefile is differnt from recent backup copy if not backed_files_list or not filecmp.cmp(backed_files_list[-1], savefile): try: shutil.copy(savefile, backupfile) except IOError as ioe: backup_error = ioe.strerror or "Unknown error" if backup_error == None: # Kill excess backups max_backup_files = int(self.shell.prefs['max_backup_files']) try: with open(universal_prefs_file) as prefs: backups = [line for line in prefs.read().splitlines() if re.match('^max_backup_files\s*=', line)] if max_backup_files < int(backups[0].split('=')[1].strip()): max_backup_files = int(backups[0].split('=')[1].strip()) except: self.shell.log.debug("No universal prefs file '%s'." % universal_prefs_file) files_to_unlink = list(reversed(backed_files_list))[max_backup_files:] for f in files_to_unlink: with ignored(IOError): os.unlink(f) self.shell.log.info("Last %d configs saved in %s." % \ (max_backup_files, backup_dir)) else: self.shell.log.warning("Could not create backup file %s: %s." % \ (backupfile, backup_error)) self.rtsroot.save_to_file(savefile) self.shell.log.info("Configuration saved to %s" % savefile) def ui_command_restoreconfig(self, savefile=default_save_file, clear_existing=False): ''' Restores configuration from a file. ''' self.assert_root() savefile = os.path.expanduser(savefile) if not os.path.isfile(savefile): self.shell.log.info("Restore file %s not found" % savefile) return errors = self.rtsroot.restore_from_file(savefile, clear_existing) self.refresh() if errors: raise ExecutionError("Configuration restored, %d recoverable errors:\n%s" % \ (len(errors), "\n".join(errors))) self.shell.log.info("Configuration restored from %s" % savefile) def ui_complete_saveconfig(self, parameters, text, current_param): ''' Auto-completes the file name ''' if current_param != 'savefile': return [] completions = complete_path(text, stat.S_ISREG) if len(completions) == 1 and not completions[0].endswith('/'): completions = [completions[0] + ' '] return completions ui_complete_restoreconfig = ui_complete_saveconfig def ui_command_clearconfig(self, confirm=None): ''' Removes entire configuration of backstores and targets ''' self.assert_root() confirm = self.ui_eval_param(confirm, 'bool', False) self.rtsroot.clear_existing(confirm=confirm) self.shell.log.info("All configuration cleared") self.refresh() def ui_command_version(self): ''' Displays the targetcli and support libraries versions. ''' from targetcli import __version__ as targetcli_version self.shell.log.info("targetcli version %s" % targetcli_version) def ui_command_sessions(self, action="list", sid=None): ''' Displays a detailed list of all open sessions. PARAMETERS ========== I{action} --------- The I{action} is one of: - B{list} gives a short session list - B{detail} gives a detailed list I{sid} ------ You can specify an I{sid} to only list this one, with or without details. SEE ALSO ======== status ''' indent_step = 4 base_steps = 0 action_list = ("list", "detail") if action not in action_list: raise ExecutionError("action must be one of: %s" % ", ".join(action_list)) if sid is not None: try: int(sid) except ValueError: raise ExecutionError("sid must be a number, '%s' given" % sid) def indent_print(text, steps): console = self.shell.con console.display(console.indent(text, indent_step * steps), no_lf=True) def print_session(session): acl = session['parent_nodeacl'] indent_print("alias: %(alias)s\tsid: %(id)i type: " \ "%(type)s session-state: %(state)s" % session, base_steps) if action == 'detail': if self.as_root: if acl.authenticate_target: auth = " (authenticated)" else: auth = " (NOT AUTHENTICATED)" else: auth = "" indent_print("name: %s%s" % (acl.node_wwn, auth), base_steps + 1) for mlun in acl.mapped_luns: plugin = mlun.tpg_lun.storage_object.plugin name = mlun.tpg_lun.storage_object.name if mlun.write_protect: mode = "r" else: mode = "rw" indent_print("mapped-lun: %d backstore: %s/%s mode: %s" % (mlun.mapped_lun, plugin, name, mode), base_steps + 1) for connection in session['connections']: indent_print("address: %(address)s (%(transport)s) cid: " \ "%(cid)i connection-state: %(cstate)s" % \ connection, base_steps + 1) if sid: printed_sessions = [x for x in self.rtsroot.sessions if x['id'] == int(sid)] else: printed_sessions = list(self.rtsroot.sessions) if len(printed_sessions): for session in printed_sessions: print_session(session) else: if sid is None: indent_print("(no open sessions)", base_steps) else: raise ExecutionError("no session found with sid %i" % int(sid))