175 lines
6.5 KiB
Python
175 lines
6.5 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 fixtures
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import logging
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import mock
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import os
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import subprocess
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import diskimage_builder.block_device.tests.test_base as tb
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from diskimage_builder.block_device.level0.localloop import image_create
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from diskimage_builder.block_device.level1.mbr import MBR
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logger = logging.getLogger(__name__)
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class TestMBR(tb.TestBase):
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disk_size_10M = 10 * 1024 * 1024
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disk_size_1G = 1024 * 1024 * 1024
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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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self.tmp_dir = fixtures.TempDir()
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self.useFixture(self.tmp_dir)
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self.image_path = os.path.join(self.tmp_dir.path, "image.raw")
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image_create(self.image_path, TestMBR.disk_size_1G)
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logger.debug("Temp image is %s", self.image_path)
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self.partx_args = [self._get_path_for_partx(), "--raw",
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"--output", "NR,START,END,TYPE,FLAGS,SCHEME",
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"-g", "-b", "-", self.image_path]
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def _run_partx(self, image_path):
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logger.info("Running command: %s", self.partx_args)
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return subprocess.check_output(self.partx_args).decode("ascii")
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@mock.patch('os.fsync', wraps=os.fsync)
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def test_one_ext_partition(self, mock_os_fsync):
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"""Creates one partition and check correctness with partx."""
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with MBR(self.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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# the exit handler of MBR should have synced the raw device
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# before exit
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mock_os_fsync.assert_called()
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output = self._run_partx(self.image_path)
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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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with MBR(self.image_path, TestMBR.disk_size_1G, 1024 * 1024):
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pass
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output = self._run_partx(self.image_path)
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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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with MBR(self.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(self.image_path)
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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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with MBR(self.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(self.image_path)
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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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with MBR(self.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(self.image_path)
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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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with MBR(self.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(self.image_path)
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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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def test_pri_fat32_lba_partition(self):
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"""Creates a partition with a non-default 'type' and verifies."""
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with MBR(self.image_path, TestMBR.disk_size_1G, 1024 * 1024) as mbr:
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mbr.add_partition(True, False, TestMBR.disk_size_10M, 0x0c)
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output = self._run_partx(self.image_path)
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self.assertEqual(
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"1 2048 22527 0xc 0x0 dos\n", output)
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