def test_set_partition_type_gpt(self):
image = Image(self.img, MiB(6), VolumeSchema.gpt)
image.partition(offset=MiB(1), size=MiB(1))
self.assertEqual(len(image.disk.partitions), 1)
image.set_parition_type(1, '21686148-6449-6E6F-744E-656564454649')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'21686148-6449-6E6F-744E-656564454649')
image.set_parition_type(1, '00000000-0000-0000-0000-0000DEADBEEF')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'00000000-0000-0000-0000-0000DEADBEEF')
def test_set_partition_type_mbr(self):
image = Image(self.img, MiB(6), VolumeSchema.mbr)
image.partition(offset=MiB(1), size=MiB(1))
self.assertEqual(len(image.disk.partitions), 1)
image.set_parition_type(1, '83')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'83')
image.set_parition_type(1, 'da')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'da')
def test_set_partition_type_mbr(self):
image = Image(self.img, MiB(6), VolumeSchema.mbr)
image.partition(offset=MiB(1), size=MiB(1))
self.assertEqual(len(image.disk.partitions), 1)
image.set_parition_type(1, '83')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'83')
image.set_parition_type(1, 'da')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'da')
def test_set_partition_type_gpt(self):
image = Image(self.img, MiB(6), VolumeSchema.gpt)
image.partition(offset=MiB(1), size=MiB(1))
self.assertEqual(len(image.disk.partitions), 1)
image.set_parition_type(1, '21686148-6449-6E6F-744E-656564454649')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'21686148-6449-6E6F-744E-656564454649')
image.set_parition_type(1, '00000000-0000-0000-0000-0000DEADBEEF')
disk_info = image.diagnostics()
self.assertEqual(disk_info['partitiontable']['partitions'][0]['type'],
'00000000-0000-0000-0000-0000DEADBEEF')
def test_small_partition_size_and_offset(self):
# LP: #1630709 - structure parts with size and offset < 1MB.
image = Image(self.img, MiB(2), VolumeSchema.mbr)
image.partition(offset=256, size=512)
disk_info = image.diagnostics()
# Even though the offset and size are set at 256 bytes and 512 bytes
# respectively, the minimum granularity is one sector (i.e. 512
# bytes). The start and size returned by diagnostics() are in sector
# units.
self.assertEqual(disk_info['partitiontable']['partitions'][0]['start'],
1)
self.assertEqual(disk_info['partitiontable']['partitions'][0]['size'],
1)
def _make_one_disk(self, imgfile, name, volume):
part_id = 1
# Create the image object for the selected volume schema
image = Image(imgfile, volume.image_size, volume.schema)
offset_writes = []
part_offsets = {}
# We first create all the needed partitions.
# For regular core16 and core18 builds, this means creating all of the
# defined partitions. For core20 (the so called 'seeded images'), we
# only create all the role-less partitions and mbr + system-seed.
# The rest is created dynamically by snapd on first boot.
for part in volume.structures:
if part.name is not None:
part_offsets[part.name] = part.offset
if part.offset_write is not None:
offset_writes.append((part.offset, part.offset_write))
if (part.role is StructureRole.mbr or part.type == 'bare' or
self._should_skip_partition(part)):
continue
activate = False
if (volume.schema is VolumeSchema.mbr and
part.role is StructureRole.system_boot):
activate = True
elif (volume.schema is VolumeSchema.gpt and
part.role is StructureRole.system_data and
part.name is None):
part.name = 'writable'
image.partition(part.offset, part.size, part.name, activate)
# Now since we're done, we need to do a second pass to copy the data
# and set all the partition types. This needs to be done like this as
# libparted's commit() operation resets type GUIDs to defaults and
# clobbers things like hybrid MBR partitions.
part_id = 1
for i, part in enumerate(volume.structures):
if self._should_skip_partition(part):
continue
image.copy_blob(volume.part_images[i],
bs=image.sector_size,
seek=part.offset // image.sector_size,
count=ceil(part.size / image.sector_size),
conv='notrunc')
if part.role is StructureRole.mbr or part.type == 'bare':
continue
image.set_parition_type(part_id, part.type)
part_id += 1
for value, dest in offset_writes:
# Decipher non-numeric offset_write values.
if isinstance(dest, tuple):
dest = part_offsets[dest[0]] + dest[1]
image.write_value_at_offset(value // image.sector_size, dest)
def test_small_partition_size_and_offset(self):
# LP: #1630709 - structure parts with size and offset < 1MB.
image = Image(self.img, MiB(2), VolumeSchema.mbr)
image.partition(offset=256, size=512)
disk_info = image.diagnostics()
# Even though the offset and size are set at 256 bytes and 512 bytes
# respectively, the minimum granularity is one sector (i.e. 512
# bytes). The start and size returned by diagnostics() are in sector
# units.
self.assertEqual(
disk_info['partitiontable']['partitions'][0]['start'],
1)
self.assertEqual(
disk_info['partitiontable']['partitions'][0]['size'],
1)
def test_mbr_image_partitions(self):
image = Image(self.img, MiB(2), VolumeSchema.mbr)
# Create the first partition.
image.partition(offset=image.sector(33),
size=image.sector(3000),
is_bootable=True)
self.assertEqual(len(image.disk.partitions), 1)
# Append the next one.
image.partition(offset=image.sector(3033), size=image.sector(1000))
self.assertEqual(len(image.disk.partitions), 2)
image.set_parition_type(1, '83')
image.set_parition_type(2, 'dd')
disk_info = image.diagnostics()
partitions = disk_info['partitiontable']
# The device id is unpredictable.
partitions.pop('id')
# XXX: In later versions of pyparted the partitiontable structure
# added a 'grain' entry that we're not really interested in.
# Remove it so we can have the tests working for all series.
if 'grain' in partitions:
partitions.pop('grain')
# Newer sfdisk displays an additional field of 'sectorsize' that
# we're not really interested in.
partitions.pop('sectorsize', None)
self.assertEqual(
partitions, {
'label':
'dos',
'device':
self.img,
'unit':
'sectors',
'partitions': [{
'node': '{}1'.format(self.img),
'start': 33,
'size': 3000,
'type': '83',
'bootable': True,
}, {
'node': '{}2'.format(self.img),
'start': 3033,
'size': 1000,
'type': 'dd',
}],
})
def test_gpt_image_partitions(self):
image = Image(self.img, MiB(10), VolumeSchema.gpt)
image.partition(offset=MiB(4), size=MiB(1), name='grub')
self.assertEqual(len(image.disk.partitions), 1)
image.partition(offset=MiB(5), size=MiB(4))
self.assertEqual(len(image.disk.partitions), 2)
image.set_parition_type(1, '21686148-6449-6E6F-744E-656564454649')
image.set_parition_type(2, '0FC63DAF-8483-4772-8E79-3D69D8477DE4')
# Use an external tool for checking the partition table to be sure
# that it's indeed correct as suspected.
disk_info = image.diagnostics()
partitions = disk_info['partitiontable']
# The device id is unpredictable.
partitions.pop('id')
# Newer sfdisk displays an additional field of 'sectorsize' that
# we're not really interested in.
partitions.pop('sectorsize', None)
# The partition uuids as well.
[p.pop('uuid') for p in partitions['partitions']]
self.maxDiff = None
self.assertEqual(
partitions, {
'label':
'gpt',
'device':
self.img,
'unit':
'sectors',
'firstlba':
34,
'lastlba':
20446,
'partitions': [{
'node': '{}1'.format(self.img),
'start': 8192,
'size': 2048,
'type': '21686148-6449-6E6F-744E-656564454649',
'name': 'grub',
}, {
'node': '{}2'.format(self.img),
'start': 10240,
'size': 8192,
'type': '0FC63DAF-8483-4772-8E79-3D69D8477DE4',
}],
})
def _make_one_disk(self, imgfile, name, volume):
part_id = 1
# Create the image object for the selected volume schema
image = Image(imgfile, volume.image_size, volume.schema)
offset_writes = []
part_offsets = {}
# We first create all the partitions.
for part in volume.structures:
if part.name is not None:
part_offsets[part.name] = part.offset
if part.offset_write is not None:
offset_writes.append((part.offset, part.offset_write))
if part.role is StructureRole.mbr or part.type == 'bare':
continue
activate = False
if (volume.schema is VolumeSchema.mbr and
part.role is StructureRole.system_boot):
activate = True
elif (volume.schema is VolumeSchema.gpt and
part.role is StructureRole.system_data and
part.name is None):
part.name = 'writable'
image.partition(part.offset, part.size, part.name, activate)
# Now since we're done, we need to do a second pass to copy the data
# and set all the partition types. This needs to be done like this as
# libparted's commit() operation resets type GUIDs to defaults and
# clobbers things like hybrid MBR partitions.
part_id = 1
for i, part in enumerate(volume.structures):
image.copy_blob(volume.part_images[i],
bs=image.sector_size,
seek=part.offset // image.sector_size,
count=ceil(part.size / image.sector_size),
conv='notrunc')
if part.role is StructureRole.mbr or part.type == 'bare':
continue
image.set_parition_type(part_id, part.type)
part_id += 1
for value, dest in offset_writes:
# Decipher non-numeric offset_write values.
if isinstance(dest, tuple):
dest = part_offsets[dest[0]] + dest[1]
image.write_value_at_offset(value // image.sector_size, dest)
def test_mbr_image_partitions(self):
image = Image(self.img, MiB(2), VolumeSchema.mbr)
# Create the first partition.
image.partition(offset=image.sector(33),
size=image.sector(3000),
is_bootable=True)
self.assertEqual(len(image.disk.partitions), 1)
# Append the next one.
image.partition(offset=image.sector(3033),
size=image.sector(1000))
self.assertEqual(len(image.disk.partitions), 2)
image.set_parition_type(1, '83')
image.set_parition_type(2, 'dd')
disk_info = image.diagnostics()
partitions = disk_info['partitiontable']
# The device id is unpredictable.
partitions.pop('id')
# XXX: In later versions of pyparted the partitiontable structure
# added a 'grain' entry that we're not really interested in.
# Remove it so we can have the tests working for all series.
if 'grain' in partitions:
partitions.pop('grain')
self.assertEqual(partitions, {
'label': 'dos',
'device': self.img,
'unit': 'sectors',
'partitions': [{
'node': '{}1'.format(self.img),
'start': 33,
'size': 3000,
'type': '83',
'bootable': True,
}, {
'node': '{}2'.format(self.img),
'start': 3033,
'size': 1000,
'type': 'dd',
}],
})
def test_mbr_image_partitions(self):
image = Image(self.img, MiB(2), VolumeSchema.mbr)
# Create the first partition.
image.partition(offset=image.sector(33),
size=image.sector(3000),
is_bootable=True)
self.assertEqual(len(image.disk.partitions), 1)
# Append the next one.
image.partition(offset=image.sector(3033), size=image.sector(1000))
self.assertEqual(len(image.disk.partitions), 2)
image.set_parition_type(1, '83')
image.set_parition_type(2, 'dd')
disk_info = image.diagnostics()
partitions = disk_info['partitiontable']
# The device id is unpredictable.
partitions.pop('id')
self.assertEqual(
partitions, {
'label':
'dos',
'device':
self.img,
'unit':
'sectors',
'partitions': [{
'node': '{}1'.format(self.img),
'start': 33,
'size': 3000,
'type': '83',
'bootable': True,
}, {
'node': '{}2'.format(self.img),
'start': 3033,
'size': 1000,
'type': 'dd',
}],
})
def test_gpt_image_partitions(self):
image = Image(self.img, MiB(10), VolumeSchema.gpt)
image.partition(offset=MiB(4), size=MiB(1), name='grub')
self.assertEqual(len(image.disk.partitions), 1)
image.partition(offset=MiB(5), size=MiB(4))
self.assertEqual(len(image.disk.partitions), 2)
image.set_parition_type(1, '21686148-6449-6E6F-744E-656564454649')
image.set_parition_type(2, '0FC63DAF-8483-4772-8E79-3D69D8477DE4')
# Use an external tool for checking the partition table to be sure
# that it's indeed correct as suspected.
disk_info = image.diagnostics()
partitions = disk_info['partitiontable']
# The device id is unpredictable.
partitions.pop('id')
# The partition uuids as well.
[p.pop('uuid') for p in partitions['partitions']]
self.maxDiff = None
self.assertEqual(partitions, {
'label': 'gpt',
'device': self.img,
'unit': 'sectors',
'firstlba': 34,
'lastlba': 20446,
'partitions': [{
'node': '{}1'.format(self.img),
'start': 8192,
'size': 2048,
'type': '21686148-6449-6E6F-744E-656564454649',
'name': 'grub',
}, {
'node': '{}2'.format(self.img),
'start': 10240,
'size': 8192,
'type': '0FC63DAF-8483-4772-8E79-3D69D8477DE4',
}],
})
def test_partition(self):
# Create BIOS boot partition
#
# The partition is 1MiB in size, as recommended by various
# partitioning guides. The actual required size is much, much
# smaller.
image = Image(self.img, MiB(10))
image.partition(new='1:4MiB:+1MiB')
image.partition(typecode='1:21686148-6449-6E6F-744E-656564454649')
image.partition(change_name='1:grub')
mbr = image.diagnostics(Diagnostics.mbr)
# We should see that the disk size is 10MiB.
self.assertRegex(mbr, '10.0 MiB')
gpt = image.diagnostics(Diagnostics.gpt)
# We should see that there is 1 partition named grub.
self.assertRegex(gpt, 'grub')
image = Image('img', GiB(4))
# Install GRUB to MBR
# TODO: this has to be represented in the image.yaml
# NOTE: the boot.img has to be a part of the gadget snap itself
# FIXME: embed a pointer to 2nd stage in bios-boot partition
image.copy_blob('blogs/img.mbr', bs=446, count=1, conv='notrunc')
# Create BIOS boot partition
#
# The partition is 1MiB in size, as recommended by various partitioning guides.
# The actual required size is much, much smaller.
#
# https://www.gnu.org/software/grub/manual/html_node/BIOS-installation.html#BIOS-installation
image.partition(new='1:4MiB:+1MiB')
image.partition(typecode='1:21686148-6449-6E6F-744E-656564454649')
image.partition(change_name='1:grub')
image.copy_blob('blobs/img.bios-boot',
bs='1MiB',
seek=4,
count=1,
conv='notrunc')
# Create EFI system partition
#
# TODO: switch to 512MiB as recommended by the standard
image.partition(new='2:5MiB:+64MiB')
image.partition(typecode='2:C12A7328-F81F-11D2-BA4B-00A0C93EC93B')
image.partition(change_name='2:system-boot')
image.copy_blob('blobs/img.system-boot',
def make_disk(self):
self.disk_img = os.path.join(self.images, 'disk.img')
image = Image(self.disk_img, GiB(4))
# Create BIOS boot partition
#
# The partition is 1MiB in size, as recommended by various
# partitioning guides. The actual required size is much, much
# smaller.
#
# https://www.gnu.org/software/grub/manual/html_node/BIOS-installation.html#BIOS-installation
# image.partition(new='1:4MiB:+1MiB')
# image.partition(typecode='1:21686148-6449-6E6F-744E-656564454649')
# image.partition(change_name='1:grub')
# image.copy_blob(self.boot_img,
# bs='1MiB', seek=4, count=1, conv='notrunc')
# Create EFI system partition
#
# TODO: switch to 512MiB as recommended by the standard
image.partition(new='2:5MiB:+64MiB')
image.partition(typecode='2:C12A7328-F81F-11D2-BA4B-00A0C93EC93B')
image.partition(change_name='2:system-boot')
image.copy_blob(self.boot_img,
bs='1MB', seek=4, count=64, conv='notrunc')
# Create main snappy writable partition
image.partition(new='3:72MiB:+3646MiB')
image.partition(typecode='3:0FC63DAF-8483-4772-8E79-3D69D8477DE4')
image.partition(change_name='3:writable')
image.copy_blob(self.root_img,
bs='1MiB', seek=72, count=3646, conv='notrunc')
self._next.append(self.finish)
image = Image('img', GiB(4))
# Install GRUB to MBR
# TODO: this has to be represented in the image.yaml
# NOTE: the boot.img has to be a part of the gadget snap itself
# FIXME: embed a pointer to 2nd stage in bios-boot partition
image.copy_blob('blogs/img.mbr', bs=446, count=1, conv='notrunc')
# Create BIOS boot partition
#
# The partition is 1MiB in size, as recommended by various partitioning guides.
# The actual required size is much, much smaller.
#
# https://www.gnu.org/software/grub/manual/html_node/BIOS-installation.html#BIOS-installation
image.partition(new='1:4MiB:+1MiB')
image.partition(typecode='1:21686148-6449-6E6F-744E-656564454649')
image.partition(change_name='1:grub')
image.copy_blob('blobs/img.bios-boot',
bs='1MiB', seek=4, count=1, conv='notrunc')
# Create EFI system partition
#
# TODO: switch to 512MiB as recommended by the standard
image.partition(new='2:5MiB:+64MiB')
image.partition(typecode='2:C12A7328-F81F-11D2-BA4B-00A0C93EC93B')
image.partition(change_name='2:system-boot')
image.copy_blob('blobs/img.system-boot',
bs='1MB', seek=4, count=64, conv='notrunc')
# Create main snappy writable partition