def _ensure(self):
if self.snap:
try:
filename = '%s.%s' % (self.snap['file'].split('.')[0],
self._uniq())
shutil.copy(self.snap['file'], filename)
except:
msg = 'Failed to copy snapshot file %s: %s' % (
self.snap['file'], sys.exc_info()[1])
raise storage2.StorageError(msg)
self.snap = None
self.file = filename
if not (self.device and self.file and \
self.device in coreutils.losetup_all()):
# Construct volume
if (not self.size and
(not self.file or not os.path.exists(self.file))):
msg = 'You must specify size of a new loop device ' \
'or existing file'
raise storage2.StorageError(msg)
if not self.file:
self.file = '/mnt/loopdev' + self._uniq()
if not os.path.exists(self.file):
if '%ROOT' in str(self.size).upper():
try:
pc = int(self.size.split('%')[0])
except:
msg = 'Incorrect size format: %s' % self.size
stat = os.statvfs('/')
total = stat.f_bsize * stat.f_blocks / 1048576
size = total * pc / 100
free = stat.f_bsize * stat.f_bfree / 1048576
if size > free:
if self.adjust_size:
size = free
else:
msg = 'Expected loop size is greater then ' \
'available free space on a root filesystem. ' \
'Expected: %sMb / Free: %sMb' % (size, free)
raise storage2.StorageError(msg)
else:
size = int(float(self.size) * 1024)
dd_kwds = {'if': '/dev/zero', 'of': self.file, 'bs': '1M'}
if self.zerofill:
dd_kwds.update({'count': size})
else:
dd_kwds.update({'seek': size - 1, 'count': 1})
coreutils.dd(**dd_kwds)
if self.device:
coreutils.losetup(self.device, self.file)
else:
coreutils.losetup(self.file, find=True)
self.device = coreutils.losetup_all(flip=True)[self.file]
def _ensure(self):
if self.snap:
try:
filename = '%s.%s' % (self.snap['file'].split('.')[0],
self._uniq())
shutil.copy(self.snap['file'], filename)
except:
msg = 'Failed to copy snapshot file %s: %s' % (
self.snap['file'], sys.exc_info()[1])
raise storage2.StorageError(msg)
self.snap = None
self.file = filename
if not (self.device and self.file and \
self.device in coreutils.losetup_all()):
# Construct volume
if (not self.size
and (not self.file or not os.path.exists(self.file))):
msg = 'You must specify size of a new loop device ' \
'or existing file'
raise storage2.StorageError(msg)
if not self.file:
self.file = '/mnt/loopdev' + self._uniq()
if not os.path.exists(self.file):
if '%ROOT' in str(self.size).upper():
try:
pc = int(self.size.split('%')[0])
except:
msg = 'Incorrect size format: %s' % self.size
stat = os.statvfs('/')
total = stat.f_bsize * stat.f_blocks / 1048576
size = total * pc / 100
free = stat.f_bsize * stat.f_bfree / 1048576
if size > free:
if self.adjust_size:
size = free
else:
msg = 'Expected loop size is greater then ' \
'available free space on a root filesystem. ' \
'Expected: %sMb / Free: %sMb' % (size, free)
raise storage2.StorageError(msg)
else:
size = int(float(self.size) * 1024)
dd_kwds = {'if': '/dev/zero', 'of': self.file, 'bs': '1M'}
if self.zerofill:
dd_kwds.update({'count': size})
else:
dd_kwds.update({'seek': size - 1, 'count': 1})
coreutils.dd(**dd_kwds)
if self.device:
coreutils.losetup(self.device, self.file)
else:
coreutils.losetup(self.file, find=True)
self.device = coreutils.losetup_all(flip=True)[self.file]
def _detach(self, force, **kwds):
if self.device:
coreutils.losetup(self.device, detach=True)
self.device = None
def _detach(self, force, **kwds):
if self.device:
coreutils.losetup(self.device, detach=True)
self.device = None
