| 168 |
168 |
self.bootable = bootable
|
| 169 |
169 |
self.progress_bar = None
|
| 170 |
170 |
self.guestfs_device = None
|
| 171 |
|
self.size = None
|
| 172 |
|
self.parttype = None
|
|
171 |
self.meta = {}
|
| 173 |
172 |
|
| 174 |
173 |
self.g = guestfs.GuestFS()
|
| 175 |
174 |
self.g.add_drive_opts(self.real_device, readonly=0)
|
| ... | ... | |
| 203 |
202 |
"We only support images with one filesystem.")
|
| 204 |
203 |
self.root = roots[0]
|
| 205 |
204 |
self.guestfs_device = self.g.part_to_dev(self.root)
|
| 206 |
|
self.size = self.g.blockdev_getsize64(self.guestfs_device)
|
| 207 |
|
self.parttype = self.g.part_get_parttype(self.guestfs_device)
|
|
205 |
self.meta['SIZE'] = self.g.blockdev_getsize64(self.guestfs_device)
|
|
206 |
self.meta['PARTITION_TABLE'] = \
|
|
207 |
self.g.part_get_parttype(self.guestfs_device)
|
| 208 |
208 |
|
| 209 |
209 |
self.ostype = self.g.inspect_get_type(self.root)
|
| 210 |
210 |
self.distro = self.g.inspect_get_distro(self.root)
|
| ... | ... | |
| 253 |
253 |
"""Umount all mounted filesystems."""
|
| 254 |
254 |
self.g.umount_all()
|
| 255 |
255 |
|
|
256 |
def _last_partition(self):
|
|
257 |
if self.meta['PARTITION_TABLE'] not in 'msdos' 'gpt':
|
|
258 |
msg = "Unsupported partition table: %s. Only msdos and gpt " \
|
|
259 |
"partition tables are supported" % self.meta['PARTITION_TABLE']
|
|
260 |
raise FatalError(msg)
|
|
261 |
|
|
262 |
is_extended = lambda p: self.g.part_get_mbr_id(
|
|
263 |
self.guestfs_device, p['part_num']) == 5
|
|
264 |
is_logical = lambda p: self.meta['PARTITION_TABLE'] != 'msdos' and \
|
|
265 |
p['part_num'] > 4
|
|
266 |
|
|
267 |
partitions = self.g.part_list(self.guestfs_device)
|
|
268 |
last_partition = partitions[-1]
|
|
269 |
|
|
270 |
if is_logical(last_partition):
|
|
271 |
# The disk contains extended and logical partitions....
|
|
272 |
extended = [p for p in partitions if is_extended(p)][0]
|
|
273 |
last_primary = [p for p in partitions if p['part_num'] <= 4][-1]
|
|
274 |
|
|
275 |
# check if extended is the last primary partition
|
|
276 |
if last_primary['part_num'] > extended['part_num']:
|
|
277 |
last_partition = last_primary
|
|
278 |
|
|
279 |
return last_partition
|
|
280 |
|
| 256 |
281 |
def shrink(self):
|
| 257 |
282 |
"""Shrink the disk.
|
| 258 |
283 |
|
| ... | ... | |
| 262 |
287 |
|
| 263 |
288 |
ATTENTION: make sure unmount is called before shrink
|
| 264 |
289 |
"""
|
| 265 |
|
output("Shrinking image (this may take a while)...", False)
|
| 266 |
|
|
| 267 |
|
if self.parttype not in 'msdos' 'gpt':
|
| 268 |
|
raise FatalError("You have a %s partition table. "
|
| 269 |
|
"Only msdos and gpt partitions are supported" % self.parttype)
|
|
290 |
get_fstype = lambda p: self.g.vfs_type("%s%d" % \
|
|
291 |
(self.guestfs_device, p['part_num']))
|
|
292 |
is_logical = lambda p: self.meta['PARTITION_TABLE'] == 'msdos' and \
|
|
293 |
p['part_num'] > 4
|
|
294 |
is_extended = lambda p: self.meta['PARTITION_TABLE'] == 'msdos' and \
|
|
295 |
self.g.part_get_mbr_id(self.guestfs_device, p['part_num']) == 5
|
|
296 |
|
|
297 |
part_add = lambda ptype, start, stop: \
|
|
298 |
self.g.part_add(self.guestfs_device, ptype, start, stop)
|
|
299 |
part_del = lambda p: self.g.part_del(self.guestfs_device, p)
|
|
300 |
part_get_id = lambda p: self.g.part_get_mbr_id(self.guestfs_device, p)
|
|
301 |
part_set_id = lambda p, id: self.g.part_set_mbr_id(
|
|
302 |
self.guestfs_device, p, id)
|
|
303 |
part_get_bootable = lambda p: self.g.part_get_bootable(
|
|
304 |
self.guestfs_device, p)
|
|
305 |
part_set_bootable = lambda p, bootable: self.g.part_set_bootable(
|
|
306 |
self.guestfs_device, p, bootable)
|
|
307 |
|
|
308 |
MB = 2 ** 20
|
| 270 |
309 |
|
| 271 |
|
last_partition = self.g.part_list(self.guestfs_device)[-1]
|
| 272 |
|
|
| 273 |
|
if self.parttype == 'msdos' and last_partition['part_num'] > 4:
|
| 274 |
|
raise FatalError("This disk contains logical partitions. "
|
| 275 |
|
"Only primary partitions are supported.")
|
| 276 |
|
|
| 277 |
|
part_dev = "%s%d" % (self.guestfs_device, last_partition['part_num'])
|
| 278 |
|
fs_type = self.g.vfs_type(part_dev)
|
| 279 |
|
if not re.match("ext[234]", fs_type):
|
| 280 |
|
warn("Don't know how to resize %s partitions." % fs_type)
|
| 281 |
|
return self.size
|
|
310 |
output("Shrinking image (this may take a while)...", False)
|
| 282 |
311 |
|
|
312 |
last_part = None
|
|
313 |
fstype = None
|
|
314 |
while True:
|
|
315 |
last_part = self._last_partition()
|
|
316 |
fstype = get_fstype(last_part)
|
|
317 |
|
|
318 |
if fstype == 'swap':
|
|
319 |
self.meta['SWAP'] = "%d:%s" % \
|
|
320 |
(last_part['part_num'],
|
|
321 |
(last_part['part_size'] + MB - 1) // MB)
|
|
322 |
part_del(last_part['part_num'])
|
|
323 |
continue
|
|
324 |
elif is_extended(last_part):
|
|
325 |
part_del(last_part['part_num'])
|
|
326 |
continue
|
|
327 |
|
|
328 |
self.meta['SIZE'] = last_part['part_end'] + 1
|
|
329 |
break
|
|
330 |
|
|
331 |
if not re.match("ext[234]", fstype):
|
|
332 |
warn("Don't know how to resize %s partitions." % fstype)
|
|
333 |
return self.meta['SIZE']
|
|
334 |
|
|
335 |
part_dev = "%s%d" % (self.guestfs_device, last_part['part_num'])
|
| 283 |
336 |
self.g.e2fsck_f(part_dev)
|
| 284 |
337 |
self.g.resize2fs_M(part_dev)
|
| 285 |
338 |
|
| ... | ... | |
| 290 |
343 |
filter(lambda x: x[0] == 'Block count', out)[0][1])
|
| 291 |
344 |
|
| 292 |
345 |
sector_size = self.g.blockdev_getss(self.guestfs_device)
|
| 293 |
|
|
| 294 |
|
start = last_partition['part_start'] / sector_size
|
|
346 |
start = last_part['part_start'] / sector_size
|
| 295 |
347 |
end = start + (block_size * block_cnt) / sector_size - 1
|
| 296 |
348 |
|
| 297 |
|
self.g.part_del(self.guestfs_device, last_partition['part_num'])
|
| 298 |
|
self.g.part_add(self.guestfs_device, 'p', start, end)
|
|
349 |
if is_logical(last_part):
|
|
350 |
partitions = self.g.part_list(self.guestfs_device)
|
|
351 |
|
|
352 |
logical = [] # logical partitions
|
|
353 |
for partition in partitions:
|
|
354 |
if partition['part_num'] < 4:
|
|
355 |
continue
|
|
356 |
logical.append({
|
|
357 |
'num': partition['part_num'],
|
|
358 |
'start': partition['part_start'] / sector_size,
|
|
359 |
'end': partition['part_end'] / sector_size,
|
|
360 |
'id': part_get_(partition['part_num']),
|
|
361 |
'bootable': part_get_bootable(partition['part_num'])
|
|
362 |
})
|
|
363 |
|
|
364 |
logical[-1]['end'] = end # new end after resize
|
|
365 |
|
|
366 |
# Recreate the extended partition
|
|
367 |
extended = [p for p in partitions if self._is_extended(p)][0]
|
|
368 |
part_del(extended['part_num'])
|
|
369 |
part_add('e', extended['part_start'], end)
|
|
370 |
|
|
371 |
# Create all the logical partitions back
|
|
372 |
for l in logical:
|
|
373 |
part_add('l', l['start'], l['end'])
|
|
374 |
part_set_id(l['num'], l['id'])
|
|
375 |
part_set_bootable(l['num'], l['bootable'])
|
|
376 |
else:
|
|
377 |
# Recreate the last partition
|
|
378 |
if self.meta['PARTITION_TABLE'] == 'msdos':
|
|
379 |
last_part['id'] = part_get_id(last_part['part_num'])
|
|
380 |
|
|
381 |
last_part['bootable'] = part_get_bootable(last_part['part_num'])
|
|
382 |
part_del(last_part['part_num'])
|
|
383 |
part_add('p', start, end)
|
|
384 |
part_set_bootable(last_part['part_num'], last_part['bootable'])
|
| 299 |
385 |
|
| 300 |
|
self.size = (end + 1) * sector_size
|
| 301 |
|
success("new size is %dMB" % ((self.size + 2 ** 20 - 1) // 2 ** 20))
|
|
386 |
if self.meta['PARTITION_TABLE'] == 'msdos':
|
|
387 |
part_set_id(last_part['part_num'], last_part['id'])
|
| 302 |
388 |
|
| 303 |
|
if self.parttype == 'gpt':
|
|
389 |
new_size = (end + 1) * sector_size
|
|
390 |
success("new size is %dMB" % ((new_size + MB - 1) // MB))
|
|
391 |
|
|
392 |
if self.meta['PARTITION_TABLE'] == 'gpt':
|
| 304 |
393 |
ptable = GPTPartitionTable(self.real_device)
|
| 305 |
|
self.size = ptable.shrink(self.size)
|
|
394 |
self.meta['SIZE'] = ptable.shrink(new_size)
|
|
395 |
else:
|
|
396 |
self.meta['SIZE'] = new_size
|
| 306 |
397 |
|
| 307 |
|
return self.size
|
|
398 |
return self.meta['SIZE']
|
| 308 |
399 |
|
| 309 |
400 |
def dump(self, outfile):
|
| 310 |
401 |
"""Dumps the content of device into a file.
|
| ... | ... | |
| 312 |
403 |
This method will only dump the actual payload, found by reading the
|
| 313 |
404 |
partition table. Empty space in the end of the device will be ignored.
|
| 314 |
405 |
"""
|
| 315 |
|
blocksize = 2 ** 22 # 4MB
|
| 316 |
|
progress_size = (self.size + 2 ** 20 - 1) // 2 ** 20 # in MB
|
|
406 |
MB = 2 ** 20
|
|
407 |
blocksize = 4 * MB # 4MB
|
|
408 |
size = self.meta['SIZE']
|
|
409 |
progress_size = (size + MB - 1) // MB # in MB
|
| 317 |
410 |
progressbar = progress("Dumping image file: ", 'mb')
|
| 318 |
411 |
progressbar.max = progress_size
|
| 319 |
412 |
|
| 320 |
413 |
with open(self.real_device, 'r') as src:
|
| 321 |
414 |
with open(outfile, "w") as dst:
|
| 322 |
|
left = self.size
|
|
415 |
left = size
|
| 323 |
416 |
offset = 0
|
| 324 |
417 |
progressbar.next()
|
| 325 |
418 |
while left > 0:
|
| ... | ... | |
| 327 |
420 |
sent = sendfile(dst.fileno(), src.fileno(), offset, length)
|
| 328 |
421 |
offset += sent
|
| 329 |
422 |
left -= sent
|
| 330 |
|
progressbar.goto((self.size - left) // 2 ** 20)
|
|
423 |
progressbar.goto((size - left) // MB)
|
| 331 |
424 |
output("\rDumping image file...\033[K", False)
|
| 332 |
425 |
success('image file %s was successfully created' % outfile)
|
| 333 |
426 |
|