ec7f56c1b2
During the creation of a disk image (e.g. for a VM), there is the need to create, setup, configure and afterwards detach some kind of storage where the newly installed OS can be copied to or directly installed in. This patch implements partitioning handling. Change-Id: I0ca6a4ae3a2684d473b44e5f332ee4225ee30f8c Signed-off-by: Andreas Florath <andreas@florath.net>
175 lines
6.3 KiB
Python
175 lines
6.3 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import copy
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from diskimage_builder.block_device.level0.localloop import LocalLoop
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from diskimage_builder.block_device.level1.mbr import MBR
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from diskimage_builder.logging_config import setup
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import logging
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import os
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import shutil
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import subprocess
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import tempfile
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import testtools
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class TestMBR(testtools.TestCase):
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disk_size_10M = 10 * 1024 * 1024
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disk_size_1G = 1024 * 1024 * 1024
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pargs = ["--raw", "--output",
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"NR,START,END,TYPE,FLAGS,SCHEME", "-g", "-b", "-"]
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def _get_path_for_partx(self):
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"""Searches and sets the path for partx
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Because different distributions store the partx binary
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at different places, there is the need to look for it.
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"""
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dirs = ["/bin", "/usr/bin", "/sbin", "/usr/sbin"]
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for d in dirs:
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if os.path.exists(os.path.join(d, "partx")):
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return os.path.join(d, "partx")
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return
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# If not found, try without path.
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return "partx"
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def setUp(self):
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super(TestMBR, self).setUp()
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setup()
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def _create_image(self):
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tmp_dir = tempfile.mkdtemp(prefix="dib-bd-mbr-")
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image_path = os.path.join(tmp_dir, "image.raw")
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LocalLoop.image_create(image_path, TestMBR.disk_size_1G)
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return tmp_dir, image_path
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def _run_partx(self, image_path):
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largs = copy.copy(TestMBR.pargs)
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partx_path = self._get_path_for_partx()
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largs.insert(0, partx_path)
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largs.append(image_path)
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logging.info("Running command [%s]", largs)
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return subprocess.check_output(largs).decode("ascii")
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def test_one_ext_partition(self):
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"""Creates one partition and check correctness with partx."""
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tmp_dir, image_path = self._create_image()
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with MBR(image_path, TestMBR.disk_size_1G, 1024 * 1024) as mbr:
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mbr.add_partition(False, False, TestMBR.disk_size_10M, 0x83)
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output = self._run_partx(image_path)
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shutil.rmtree(tmp_dir)
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self.assertEqual(
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"1 2048 2097151 0xf 0x0 dos\n"
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"5 4096 24575 0x83 0x0 dos\n", output)
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def test_zero_partitions(self):
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"""Creates no partition and check correctness with partx."""
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tmp_dir, image_path = self._create_image()
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with MBR(image_path, TestMBR.disk_size_1G, 1024 * 1024):
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pass
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output = self._run_partx(image_path)
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shutil.rmtree(tmp_dir)
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self.assertEqual("", output)
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def test_many_ext_partitions(self):
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"""Creates many partition and check correctness with partx."""
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tmp_dir, image_path = self._create_image()
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with MBR(image_path, TestMBR.disk_size_1G, 1024 * 1024) as mbr:
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for nr in range(0, 64):
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mbr.add_partition(False, False, TestMBR.disk_size_10M, 0x83)
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output = self._run_partx(image_path)
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shutil.rmtree(tmp_dir)
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lines = output.split("\n")
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self.assertEqual(66, len(lines))
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self.assertEqual(
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"1 2048 2097151 0xf 0x0 dos", lines[0])
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start_block = 4096
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end_block = start_block + TestMBR.disk_size_10M / 512 - 1
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for nr in range(1, 65):
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fields = lines[nr].split(" ")
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self.assertEqual(6, len(fields))
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self.assertEqual(nr + 4, int(fields[0]))
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self.assertEqual(start_block, int(fields[1]))
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self.assertEqual(end_block, int(fields[2]))
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self.assertEqual("0x83", fields[3])
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self.assertEqual("0x0", fields[4])
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self.assertEqual("dos", fields[5])
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start_block += 22528
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end_block = start_block + TestMBR.disk_size_10M / 512 - 1
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def test_one_pri_partition(self):
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"""Creates one primary partition and check correctness with partx."""
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tmp_dir, image_path = self._create_image()
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with MBR(image_path, TestMBR.disk_size_1G, 1024 * 1024) as mbr:
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mbr.add_partition(True, False, TestMBR.disk_size_10M, 0x83)
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output = self._run_partx(image_path)
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shutil.rmtree(tmp_dir)
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self.assertEqual(
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"1 2048 22527 0x83 0x0 dos\n", output)
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def test_three_pri_partition(self):
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"""Creates three primary partition and check correctness with partx."""
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tmp_dir, image_path = self._create_image()
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with MBR(image_path, TestMBR.disk_size_1G, 1024 * 1024) as mbr:
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for _ in range(3):
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mbr.add_partition(True, False, TestMBR.disk_size_10M, 0x83)
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output = self._run_partx(image_path)
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shutil.rmtree(tmp_dir)
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self.assertEqual(
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"1 2048 22527 0x83 0x0 dos\n"
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"2 22528 43007 0x83 0x0 dos\n"
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"3 43008 63487 0x83 0x0 dos\n", output)
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def test_many_pri_and_ext_partition(self):
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"""Creates many primary and extended partitions."""
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tmp_dir, image_path = self._create_image()
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with MBR(image_path, TestMBR.disk_size_1G, 1024 * 1024) as mbr:
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# Create three primary partitions
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for _ in range(3):
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mbr.add_partition(True, False, TestMBR.disk_size_10M, 0x83)
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for _ in range(7):
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mbr.add_partition(False, False, TestMBR.disk_size_10M, 0x83)
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output = self._run_partx(image_path)
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shutil.rmtree(tmp_dir)
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self.assertEqual(
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"1 2048 22527 0x83 0x0 dos\n" # Primary 1
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"2 22528 43007 0x83 0x0 dos\n" # Primary 2
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"3 43008 63487 0x83 0x0 dos\n" # Primary 3
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"4 63488 2097151 0xf 0x0 dos\n" # Extended
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"5 65536 86015 0x83 0x0 dos\n" # Extended Partition 1
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"6 88064 108543 0x83 0x0 dos\n" # Extended Partition 2
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"7 110592 131071 0x83 0x0 dos\n" # ...
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"8 133120 153599 0x83 0x0 dos\n"
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"9 155648 176127 0x83 0x0 dos\n"
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"10 178176 198655 0x83 0x0 dos\n"
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"11 200704 221183 0x83 0x0 dos\n", output)
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