Coverage for drivers/EXT4SR : 0%

Hot-keys on this page
r m x p toggle line displays
j k next/prev highlighted chunk
0 (zero) top of page
1 (one) first highlighted chunk
#!/usr/bin/env python # # Original work copyright (C) Citrix systems # Modified work copyright (C) Vates SAS and XCP-ng community # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU Lesser General Public License as published # by the Free Software Foundation; version 2.1 only. # # 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 Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser 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 # # EXT4SR: Based on local-file storage repository, mounts ext4 partition
import SR, SRCommand, FileSR, util, lvutil, scsiutil
import os import xs_errors import vhdutil from lock import Lock from constants import EXT_PREFIX
CAPABILITIES = ["SR_PROBE","SR_UPDATE", "SR_SUPPORTS_LOCAL_CACHING", \ "VDI_CREATE","VDI_DELETE","VDI_ATTACH","VDI_DETACH", \ "VDI_UPDATE","VDI_CLONE","VDI_SNAPSHOT","VDI_RESIZE","VDI_MIRROR", \ "VDI_GENERATE_CONFIG", \ "VDI_RESET_ON_BOOT/2","ATOMIC_PAUSE", "VDI_CONFIG_CBT", "VDI_ACTIVATE", "VDI_DEACTIVATE"]
CONFIGURATION = [ [ 'device', 'local device path (required) (e.g. /dev/sda3)' ] ]
DRIVER_INFO = { 'name': 'Local EXT4 VHD', 'description': 'SR plugin which represents disks as VHD files stored on a local EXT4 filesystem, created inside an LVM volume', 'vendor': 'Vates SAS', 'copyright': '(C) 2019 Vates SAS', 'driver_version': '1.0', 'required_api_version': '1.0', 'capabilities': CAPABILITIES, 'configuration': CONFIGURATION }
DRIVER_CONFIG = {"ATTACH_FROM_CONFIG_WITH_TAPDISK": True}
class EXT4SR(FileSR.FileSR): """EXT4 Local file storage repository""" def handles(srtype): return srtype == 'ext4' handles = staticmethod(handles)
def load(self, sr_uuid): self.ops_exclusive = FileSR.OPS_EXCLUSIVE self.lock = Lock(vhdutil.LOCK_TYPE_SR, self.uuid) self.sr_vditype = SR.DEFAULT_TAP if not self.dconf.has_key('device') or not self.dconf['device']: raise xs_errors.XenError('ConfigDeviceMissing')
self.root = self.dconf['device'] for dev in self.root.split(','): if not self._isvalidpathstring(dev): raise xs_errors.XenError('ConfigDeviceInvalid', \ opterr='path is %s' % dev) self.path = os.path.join(SR.MOUNT_BASE, sr_uuid) self.vgname = EXT_PREFIX + sr_uuid self.remotepath = os.path.join("/dev",self.vgname,sr_uuid) self.attached = self._checkmount() self.driver_config = DRIVER_CONFIG
def delete(self, sr_uuid): super(EXT4SR, self).delete(sr_uuid)
# Check PVs match VG try: for dev in self.root.split(','): cmd = ["pvs", dev] txt = util.pread2(cmd) if txt.find(self.vgname) == -1: raise xs_errors.XenError('VolNotFound', \ opterr='volume is %s' % self.vgname) except util.CommandException, inst: raise xs_errors.XenError('PVSfailed', \ opterr='error is %d' % inst.code)
# Remove LV, VG and pv try: cmd = ["lvremove", "-f", self.remotepath] util.pread2(cmd)
cmd = ["vgremove", self.vgname] util.pread2(cmd)
for dev in self.root.split(','): cmd = ["pvremove", dev] util.pread2(cmd) except util.CommandException, inst: raise xs_errors.XenError('LVMDelete', \ opterr='errno is %d' % inst.code)
def attach(self, sr_uuid): if not self._checkmount(): try: #Activate LV cmd = ['lvchange','-ay',self.remotepath] util.pread2(cmd)
# make a mountpoint: if not os.path.isdir(self.path): os.makedirs(self.path) except util.CommandException, inst: raise xs_errors.XenError('LVMMount', \ opterr='Unable to activate LV. Errno is %d' % inst.code)
try: util.pread(["fsck", "-a", self.remotepath]) except util.CommandException, inst: if inst.code == 1: util.SMlog("FSCK detected and corrected FS errors. Not fatal.") else: raise xs_errors.XenError('LVMMount', \ opterr='FSCK failed on %s. Errno is %d' % (self.remotepath,inst.code))
try: util.pread(["mount", self.remotepath, self.path]) except util.CommandException, inst: raise xs_errors.XenError('LVMMount', \ opterr='Failed to mount FS. Errno is %d' % inst.code)
self.attached = True
#Update SCSIid string scsiutil.add_serial_record(self.session, self.sr_ref, \ scsiutil.devlist_to_serialstring(self.root.split(',')))
# Set the block scheduler for dev in self.root.split(','): self.block_setscheduler(dev)
def detach(self, sr_uuid): super(EXT4SR, self).detach(sr_uuid) try: # deactivate SR cmd = ["lvchange", "-an", self.remotepath] util.pread2(cmd) except util.CommandException, inst: raise xs_errors.XenError('LVMUnMount', \ opterr='lvm -an failed errno is %d' % inst.code)
def probe(self): return lvutil.srlist_toxml(lvutil.scan_srlist(EXT_PREFIX, self.root), EXT_PREFIX)
def create(self, sr_uuid, size): # THIS DRIVER IS DEPRECATED. RAISE. raise Exception('The `ext4` SR type is deprecated since XCP-ng 8.1.\n' 'Use the main `ext` driver instead. It will create an EXT4 filesystem now, ' 'not EXT3 anymore as it used to.')
if self._checkmount(): raise xs_errors.XenError('SRExists')
# Check none of the devices already in use by other PBDs if util.test_hostPBD_devs(self.session, sr_uuid, self.root): raise xs_errors.XenError('SRInUse')
# Check serial number entry in SR records for dev in self.root.split(','): if util.test_scsiserial(self.session, dev): raise xs_errors.XenError('SRInUse')
if not lvutil._checkVG(self.vgname): lvutil.createVG(self.root, self.vgname)
if lvutil._checkLV(self.remotepath): raise xs_errors.XenError('SRExists')
try: numdevs = len(self.root.split(',')) cmd = ["lvcreate", "-n", sr_uuid] if numdevs > 1: lowest = -1 for dev in self.root.split(','): stats = lvutil._getPVstats(dev) if lowest < 0 or stats['freespace'] < lowest: lowest = stats['freespace'] size_mb = (lowest / (1024 * 1024)) * numdevs
# Add stripe parameter to command cmd += ["-i", str(numdevs), "-I", "2048"] else: stats = lvutil._getVGstats(self.vgname) size_mb = stats['freespace'] / (1024 * 1024) assert(size_mb > 0) cmd += ["-L", str(size_mb), self.vgname] text = util.pread(cmd)
cmd = ["lvchange", "-ay", self.remotepath] text = util.pread(cmd) except util.CommandException, inst: raise xs_errors.XenError('LVMCreate', \ opterr='lv operation, error %d' % inst.code) except AssertionError: raise xs_errors.XenError('SRNoSpace', \ opterr='Insufficient space in VG %s' % self.vgname)
try: util.pread2(["mkfs.ext4", "-F", self.remotepath]) except util.CommandException, inst: raise xs_errors.XenError('LVMFilesystem', \ opterr='mkfs failed error %d' % inst.code)
#Update serial number string scsiutil.add_serial_record(self.session, self.sr_ref, \ scsiutil.devlist_to_serialstring(self.root.split(',')))
def vdi(self, uuid, loadLocked = False): if not loadLocked: return EXTFileVDI(self, uuid) return EXTFileVDI(self, uuid)
class EXTFileVDI(FileSR.FileVDI): def attach(self, sr_uuid, vdi_uuid): if not hasattr(self,'xenstore_data'): self.xenstore_data = {}
self.xenstore_data["storage-type"]="ext"
return super(EXTFileVDI, self).attach(sr_uuid, vdi_uuid)
if __name__ == '__main__': SRCommand.run(EXT4SR, DRIVER_INFO) else: SR.registerSR(EXT4SR) |