mirror of
git://sourceware.org/git/lvm2.git
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154 lines
4.5 KiB
Python
154 lines
4.5 KiB
Python
# Copyright (C) 2015-2016 Red Hat, Inc. All rights reserved.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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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, see <http://www.gnu.org/licenses/>.
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import subprocess
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from . import cfg
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from .cmdhandler import options_to_cli_args, LvmExecutionMeta, call_lvm
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import dbus
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from .utils import pv_range_append, pv_dest_ranges, log_error, log_debug,\
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mt_async_call
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from .request import RequestEntry
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import threading
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import time
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import traceback
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def pv_move_lv_cmd(move_options, lv_full_name,
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pv_source, pv_source_range, pv_dest_range_list):
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cmd = ['pvmove', '-i', '1']
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cmd.extend(options_to_cli_args(move_options))
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if lv_full_name:
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cmd.extend(['-n', lv_full_name])
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pv_range_append(cmd, pv_source, *pv_source_range)
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pv_dest_ranges(cmd, pv_dest_range_list)
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return cmd
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def lv_merge_cmd(merge_options, lv_full_name):
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cmd = ['lvconvert', '--merge', '-i', '1']
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cmd.extend(options_to_cli_args(merge_options))
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cmd.append(lv_full_name)
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return cmd
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def _load_wrapper(ignored):
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cfg.load()
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def _move_callback(job_state, line_str):
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try:
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if line_str.count(':') == 2:
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(device, ignore, percentage) = line_str.split(':')
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job_state.Percent = int(round(
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float(percentage.strip()[:-1]), 1))
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# While the move is in progress we need to periodically update
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# the state to reflect where everything is at. we will do this
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# by scheduling the load to occur in the main work queue.
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r = RequestEntry(
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-1, _load_wrapper, ("_move_callback: load",), None, None, False)
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cfg.worker_q.put(r)
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except ValueError:
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log_error("Trying to parse percentage which failed for %s" % line_str)
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def _move_merge(interface_name, command, job_state):
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# We need to execute these command stand alone by forking & exec'ing
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# the command always as we will be getting periodic output from them on
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# the status of the long running operation.
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meta = LvmExecutionMeta(time.time(), 0, command)
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cfg.flightrecorder.add(meta)
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ec, stdout, stderr = call_lvm(command, line_cb=_move_callback,
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cb_data=job_state)
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ended = time.time()
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meta.completed(ended, ec, stdout, stderr)
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if ec == 0:
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job_state.Percent = 100
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else:
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raise dbus.exceptions.DBusException(
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interface_name,
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'Exit code %s, stderr = %s' % (str(ec), stderr))
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cfg.load()
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return '/'
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def move(interface_name, lv_name, pv_src_obj, pv_source_range,
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pv_dests_and_ranges, move_options, job_state):
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"""
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Common code for the pvmove handling.
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:param interface_name: What dbus interface we are providing for
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:param lv_name: Optional (None or name of LV to move)
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:param pv_src_obj: dbus object patch for source PV
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:param pv_source_range: (0,0 to ignore, else start, end segments)
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:param pv_dests_and_ranges: Array of PV object paths and start/end segs
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:param move_options: Hash with optional arguments
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:param job_state: Used to convey information about jobs between processes
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:return: '/' When complete, the empty object path
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"""
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pv_dests = []
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pv_src = cfg.om.get_object_by_path(pv_src_obj)
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if pv_src:
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# Check to see if we are handling a move to a specific
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# destination(s)
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if len(pv_dests_and_ranges):
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for pr in pv_dests_and_ranges:
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pv_dbus_obj = cfg.om.get_object_by_path(pr[0])
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if not pv_dbus_obj:
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raise dbus.exceptions.DBusException(
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interface_name,
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'PV Destination (%s) not found' % pr[0])
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pv_dests.append((pv_dbus_obj.lvm_id, pr[1], pr[2]))
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cmd = pv_move_lv_cmd(move_options,
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lv_name,
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pv_src.lvm_id,
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pv_source_range,
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pv_dests)
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return _move_merge(interface_name, cmd, job_state)
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else:
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raise dbus.exceptions.DBusException(
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interface_name, 'pv_src_obj (%s) not found' % pv_src_obj)
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def merge(interface_name, lv_uuid, lv_name, merge_options, job_state):
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# Make sure we have a dbus object representing it
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dbo = cfg.om.get_object_by_uuid_lvm_id(lv_uuid, lv_name)
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if dbo:
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cmd = lv_merge_cmd(merge_options, dbo.lvm_id)
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return _move_merge(interface_name, cmd, job_state)
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else:
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raise dbus.exceptions.DBusException(
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interface_name,
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'LV with uuid %s and name %s not present!' % (lv_uuid, lv_name))
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def _run_cmd(req):
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log_debug(
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"_run_cmd: Running method: %s with args %s" %
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(str(req.method), str(req.arguments)))
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req.run_cmd()
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log_debug("_run_cmd: complete!")
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def cmd_runner(request):
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t = threading.Thread(target=_run_cmd, args=(request,),
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name="cmd_runner %s" % str(request.method))
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t.start()
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