120 lines
4.1 KiB
Python
120 lines
4.1 KiB
Python
# 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.
|
|
import os
|
|
|
|
from oslo_concurrency import processutils as putils
|
|
from oslo_log import log as logging
|
|
|
|
from os_brick import caches
|
|
from os_brick import exception
|
|
from os_brick import executor
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class OpenCASEngine(executor.Executor, caches.CacheEngineBase):
|
|
def __init__(self, **kwargs):
|
|
super(OpenCASEngine, self).__init__(**kwargs)
|
|
|
|
self.cache_id = kwargs.get('opencas_cache_id')
|
|
|
|
def os_execute(self, *cmd, **kwargs):
|
|
LOG.debug('os_execute: cmd: %s, args: %s', cmd, kwargs)
|
|
try:
|
|
out, err = self._execute(*cmd, **kwargs)
|
|
except putils.ProcessExecutionError as err:
|
|
LOG.exception('os_execute error')
|
|
LOG.error('Cmd :%s', err.cmd)
|
|
LOG.error('StdOut :%s', err.stdout)
|
|
LOG.error('StdErr :%s', err.stderr)
|
|
raise
|
|
return out, err
|
|
|
|
def is_engine_ready(self, **kwargs):
|
|
"""'casadm -L' will print like:
|
|
|
|
type id disk status write policy device
|
|
cache 1 /dev/nvme0n1 Running wt -
|
|
"""
|
|
cmd = ['casadm', '-L']
|
|
kwargs = dict(run_as_root=True,
|
|
root_helper=self._root_helper)
|
|
out, err = self.os_execute(*cmd, **kwargs)
|
|
|
|
for line in out.splitlines():
|
|
fields = line.split()
|
|
if str(self.cache_id) == fields[1] and 'Running' == fields[3]:
|
|
return True
|
|
|
|
return False
|
|
|
|
def attach_volume(self, **kwargs):
|
|
core = kwargs.get('dev_path')
|
|
if core is None:
|
|
LOG.error('dev_path is not specified')
|
|
raise exception.VolumePathsNotFound()
|
|
core = os.path.realpath(core)
|
|
return self._map_casdisk(core)
|
|
|
|
def detach_volume(self, **kwargs):
|
|
casdev = kwargs.get('dev_path')
|
|
if casdev is None:
|
|
LOG.error('dev_path is not specified')
|
|
raise exception.VolumePathsNotFound()
|
|
coreid, coredev = self._get_mapped_coredev(casdev)
|
|
LOG.info("opencas: coreid=%s,coredev=%s", coreid, coredev)
|
|
self._unmap_casdisk(coreid)
|
|
return coredev
|
|
|
|
def _get_mapped_casdev(self, core):
|
|
cmd = ['casadm', '-L']
|
|
kwargs = dict(run_as_root=True,
|
|
root_helper=self._root_helper)
|
|
out, err = self.os_execute(*cmd, **kwargs)
|
|
|
|
for line in out.splitlines():
|
|
if line.find(core) < 0:
|
|
continue
|
|
fields = line.split()
|
|
return fields[5]
|
|
|
|
raise exception.BrickException('Cannot find emulated device.')
|
|
|
|
def _get_mapped_coredev(self, casdev):
|
|
cmd = ['casadm', '-L']
|
|
kwargs = dict(run_as_root=True,
|
|
root_helper=self._root_helper)
|
|
out, err = self.os_execute(*cmd, **kwargs)
|
|
|
|
for line in out.splitlines():
|
|
if line.find(casdev) < 0:
|
|
continue
|
|
fields = line.split()
|
|
return (fields[1], fields[2])
|
|
|
|
raise exception.BrickException('Cannot find core device.')
|
|
|
|
def _map_casdisk(self, core):
|
|
cmd = ['casadm', '-A', '-i', self.cache_id, '-d', core]
|
|
kwargs = dict(run_as_root=True,
|
|
root_helper=self._root_helper)
|
|
out, err = self.os_execute(*cmd, **kwargs)
|
|
|
|
return self._get_mapped_casdev(core)
|
|
|
|
def _unmap_casdisk(self, coreid):
|
|
cmd = ['casadm', '-R', '-f', '-i', self.cache_id, '-j', coreid]
|
|
kwargs = dict(run_as_root=True,
|
|
root_helper=self._root_helper)
|
|
out, err = self.os_execute(*cmd, **kwargs)
|