from image_creator.util import get_command
from image_creator.util import FatalError
from image_creator.gpt import GPTPartitionTable
+from image_creator.bundle_volume import BundleVolume
+
import stat
import os
import tempfile
self._devices = []
self.source = source
self.out = output
+ self.meta = {}
def _add_cleanup(self, job, *args):
self._cleanup_jobs.append((job, args))
return loop
def _dir_to_disk(self):
- raise FatalError("Using a directory as media source is not supported "
- "yet!")
+ if self.source == '/':
+ bundle = BundleVolume(self.out, self.meta)
+ return self._losetup(bundle.create_image())
+ raise FatalError("Using a directory as media source is supported")
def cleanup(self):
"""Cleanup internal data. This needs to be called before the
program ends.
"""
- while len(self._devices):
- device = self._devices.pop()
- device.destroy()
-
- while len(self._cleanup_jobs):
- job, args = self._cleanup_jobs.pop()
- job(*args)
+ try:
+ while len(self._devices):
+ device = self._devices.pop()
+ device.destroy()
+ finally:
+ # Make sure those are executed even if one of the device.destroy
+ # methods throws exeptions.
+ while len(self._cleanup_jobs):
+ job, args = self._cleanup_jobs.pop()
+ job(*args)
def snapshot(self):
"""Creates a snapshot of the original source media of the Disk
mode = os.stat(self.source).st_mode
if stat.S_ISDIR(mode):
self.out.success('looks like a directory')
- return self._losetup(self._dir_to_disk())
+ return self._dir_to_disk()
elif stat.S_ISREG(mode):
self.out.success('looks like an image file')
sourcedev = self._losetup(self.source)
# Take a snapshot and return it to the user
self.out.output("Snapshotting media source...", False)
- size = blockdev('--getsize', sourcedev)
+ size = blockdev('--getsz', sourcedev)
cowfd, cow = tempfile.mkstemp()
os.close(cowfd)
self._add_cleanup(os.unlink, cow)
- # Create 1G cow sparse file
- dd('if=/dev/null', 'of=%s' % cow, 'bs=1k', 'seek=%d' % (1024 * 1024))
+ # Create cow sparse file
+ dd('if=/dev/null', 'of=%s' % cow, 'bs=512', 'seek=%d' % int(size))
cowdev = self._losetup(cow)
snapshot = uuid.uuid4().hex
as created by the device-mapper.
"""
- def __init__(self, device, output, bootable=True):
+ def __init__(self, device, output, bootable=True, meta={}):
"""Create a new DiskDevice."""
self.real_device = device
self.out = output
self.bootable = bootable
+ self.meta = meta
self.progress_bar = None
self.guestfs_device = None
- self.meta = {}
+ self.size = 0
self.g = guestfs.GuestFS()
self.g.add_drive_opts(self.real_device, readonly=0)
self.progressbar.success('done')
self.progressbar = None
- self.out.output('Inspecting Operating System...', False)
+ self.out.output('Inspecting Operating System ...', False)
roots = self.g.inspect_os()
if len(roots) == 0:
raise FatalError("No operating system found")
"We only support images with one OS.")
self.root = roots[0]
self.guestfs_device = self.g.part_to_dev(self.root)
- self.meta['SIZE'] = self.g.blockdev_getsize64(self.guestfs_device)
+ self.size = self.g.blockdev_getsize64(self.guestfs_device)
self.meta['PARTITION_TABLE'] = \
self.g.part_get_parttype(self.guestfs_device)
def destroy(self):
"""Destroy this DiskDevice instance."""
- if self.guestfs_enabled:
- self.g.umount_all()
- self.g.sync()
-
- # Close the guestfs handler if open
- self.g.close()
+ # In new guestfs versions, there is a handy shutdown method for this
+ try:
+ if self.guestfs_enabled:
+ self.g.umount_all()
+ self.g.sync()
+ finally:
+ # Close the guestfs handler if open
+ self.g.close()
def progress_callback(self, ev, eh, buf, array):
position = array[2]
"""Mount all disk partitions in a correct order."""
mount = self.g.mount_ro if readonly else self.g.mount
- self.out.output("Mounting image...", False)
+ msg = " read-only" if readonly else ""
+ self.out.output("Mounting the media%s..." % msg, False)
mps = self.g.inspect_get_mountpoints(self.root)
# Sort the keys to mount the fs in a correct order.
# Most disk manipulation programs leave 2048 sectors after the last
# partition
new_size = last_part['part_end'] + 1 + 2048 * sector_size
- self.meta['SIZE'] = min(self.meta['SIZE'], new_size)
+ self.size = min(self.size, new_size)
break
if not re.match("ext[234]", fstype):
self.out.warn("Don't know how to resize %s partitions." % fstype)
- return self.meta['SIZE']
+ return self.size
part_dev = "%s%d" % (self.guestfs_device, last_part['part_num'])
self.g.e2fsck_f(part_dev)
new_size = (end + 1) * sector_size
- assert (new_size <= self.meta['SIZE'])
+ assert (new_size <= self.size)
if self.meta['PARTITION_TABLE'] == 'gpt':
ptable = GPTPartitionTable(self.real_device)
- self.meta['SIZE'] = ptable.shrink(new_size, self.meta['SIZE'])
+ self.size = ptable.shrink(new_size, self.size)
else:
- self.meta['SIZE'] = min(new_size + 2048 * sector_size,
- self.meta['SIZE'])
+ self.size = min(new_size + 2048 * sector_size, self.size)
- self.out.success("new size is %dMB" %
- ((self.meta['SIZE'] + MB - 1) // MB))
+ self.out.success("new size is %dMB" % ((self.size + MB - 1) // MB))
- return self.meta['SIZE']
+ return self.size
def dump(self, outfile):
"""Dumps the content of device into a file.
"""
MB = 2 ** 20
blocksize = 4 * MB # 4MB
- size = self.meta['SIZE']
+ size = self.size
progr_size = (size + MB - 1) // MB # in MB
progressbar = self.out.Progress(progr_size, "Dumping image file", 'mb')
progressbar.next()
while left > 0:
length = min(left, blocksize)
- sent = sendfile(dst.fileno(), src.fileno(), offset, length)
+ _, sent = sendfile(dst.fileno(), src.fileno(), offset,
+ length)
offset += sent
left -= sent
progressbar.goto((size - left) // MB)
projects / snf-image-creator / blobdiff