c6bd70a5e6
The image building functions in build_image.py have been returning
(success, result) or special values to indicate the validity of the
result. The same logic can be better expressed by raising exceptions
instead, because
a) using a special value relies on caller to check for that magic
value;
b) exceptions can carry additional messages other than a boolean does,
e.g. the output from the failing command;
c) caller can have cleaner code flow without explicitly checking for
the validity of the result.
This CL changes such functions to raise on errors. The majority of these
functions are internal to build_image.py only, except for BuildImage()
that has a few callers in add_img_to_target_files.py (which all die upon
error anyway).
Test: `m dist`
Test: python -m unittest test_build_image
Test: python -m unittest test_add_img_to_target_files
Test: python -m unittest test_validate_target_files
Test: Inject an error to the depended binaries (e.g. avbtool), and check
that build_image.py exits with error messages.
Change-Id: Ibe4d51e267756bb1a00fa9238a213f9d55fd9b58
1113 lines
40 KiB
Python
Executable File
1113 lines
40 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright (C) 2011 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Builds output_image from the given input_directory, properties_file,
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and writes the image to target_output_directory.
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If argument generated_prop_file exists, write additional properties to the file.
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Usage: build_image.py input_directory properties_file output_image \\
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target_output_directory [generated_prop_file]
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"""
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from __future__ import print_function
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import os
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import os.path
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import re
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import shlex
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import shutil
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import subprocess
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import sys
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import common
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import sparse_img
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OPTIONS = common.OPTIONS
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FIXED_SALT = "aee087a5be3b982978c923f566a94613496b417f2af592639bc80d141e34dfe7"
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BLOCK_SIZE = 4096
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BYTES_IN_MB = 1024 * 1024
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class BuildImageError(Exception):
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"""An Exception raised during image building."""
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def __init__(self, message):
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Exception.__init__(self, message)
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def RunCommand(cmd, verbose=None, env=None):
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"""Echo and run the given command.
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Args:
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cmd: the command represented as a list of strings.
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verbose: show commands being executed.
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env: a dictionary of additional environment variables.
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Returns:
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A tuple of the output and the exit code.
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"""
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env_copy = None
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if env is not None:
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env_copy = os.environ.copy()
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env_copy.update(env)
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if verbose is None:
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verbose = OPTIONS.verbose
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if verbose:
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print("Running: " + " ".join(cmd))
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p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
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env=env_copy)
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output, _ = p.communicate()
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if verbose:
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print(output.rstrip())
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return (output, p.returncode)
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def GetVerityFECSize(partition_size):
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cmd = ["fec", "-s", str(partition_size)]
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output, exit_code = RunCommand(cmd, False)
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if exit_code != 0:
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raise BuildImageError("Failed to GetVerityFECSize:\n{}".format(output))
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return int(output)
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def GetVerityTreeSize(partition_size):
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cmd = ["build_verity_tree", "-s", str(partition_size)]
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output, exit_code = RunCommand(cmd, False)
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if exit_code != 0:
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raise BuildImageError("Failed to GetVerityTreeSize:\n{}".format(output))
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return int(output)
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def GetVerityMetadataSize(partition_size):
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cmd = ["build_verity_metadata.py", "size", str(partition_size)]
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output, exit_code = RunCommand(cmd, False)
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if exit_code != 0:
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raise BuildImageError("Failed to GetVerityMetadataSize:\n{}".format(output))
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return int(output)
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def GetVeritySize(partition_size, fec_supported):
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verity_tree_size = GetVerityTreeSize(partition_size)
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verity_metadata_size = GetVerityMetadataSize(partition_size)
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verity_size = verity_tree_size + verity_metadata_size
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if fec_supported:
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fec_size = GetVerityFECSize(partition_size + verity_size)
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return verity_size + fec_size
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return verity_size
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def GetDiskUsage(path):
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"""Returns the number of bytes that "path" occupies on host.
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Args:
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path: The directory or file to calculate size on
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Returns:
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The number of bytes.
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Raises:
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BuildImageError: On error.
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"""
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env = {"POSIXLY_CORRECT": "1"}
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cmd = ["du", "-s", path]
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output, exit_code = RunCommand(cmd, verbose=False, env=env)
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if exit_code != 0:
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raise BuildImageError("Failed to get disk usage:\n{}".format(output))
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# POSIX du returns number of blocks with block size 512
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return int(output.split()[0]) * 512
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def GetSimgSize(image_file):
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simg = sparse_img.SparseImage(image_file, build_map=False)
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return simg.blocksize * simg.total_blocks
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def ZeroPadSimg(image_file, pad_size):
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blocks = pad_size // BLOCK_SIZE
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print("Padding %d blocks (%d bytes)" % (blocks, pad_size))
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simg = sparse_img.SparseImage(image_file, mode="r+b", build_map=False)
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simg.AppendFillChunk(0, blocks)
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def AVBCalcMaxImageSize(avbtool, footer_type, partition_size, additional_args):
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"""Calculates max image size for a given partition size.
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Args:
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avbtool: String with path to avbtool.
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footer_type: 'hash' or 'hashtree' for generating footer.
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partition_size: The size of the partition in question.
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additional_args: Additional arguments to pass to "avbtool add_hash_footer"
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or "avbtool add_hashtree_footer".
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Returns:
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The maximum image size.
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Raises:
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BuildImageError: On error or getting invalid image size.
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"""
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cmd = [avbtool, "add_%s_footer" % footer_type,
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"--partition_size", str(partition_size), "--calc_max_image_size"]
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cmd.extend(shlex.split(additional_args))
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output, exit_code = RunCommand(cmd)
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if exit_code != 0:
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raise BuildImageError(
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"Failed to calculate max image size:\n{}".format(output))
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image_size = int(output)
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if image_size <= 0:
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raise BuildImageError(
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"Invalid max image size: {}".format(output))
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return image_size
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def AVBCalcMinPartitionSize(image_size, size_calculator):
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"""Calculates min partition size for a given image size.
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Args:
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image_size: The size of the image in question.
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size_calculator: The function to calculate max image size
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for a given partition size.
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Returns:
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The minimum partition size required to accommodate the image size.
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"""
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# Use image size as partition size to approximate final partition size.
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image_ratio = size_calculator(image_size) / float(image_size)
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# Prepare a binary search for the optimal partition size.
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lo = int(image_size / image_ratio) // BLOCK_SIZE * BLOCK_SIZE - BLOCK_SIZE
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# Ensure lo is small enough: max_image_size should <= image_size.
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delta = BLOCK_SIZE
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max_image_size = size_calculator(lo)
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while max_image_size > image_size:
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image_ratio = max_image_size / float(lo)
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lo = int(image_size / image_ratio) // BLOCK_SIZE * BLOCK_SIZE - delta
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delta *= 2
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max_image_size = size_calculator(lo)
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hi = lo + BLOCK_SIZE
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# Ensure hi is large enough: max_image_size should >= image_size.
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delta = BLOCK_SIZE
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max_image_size = size_calculator(hi)
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while max_image_size < image_size:
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image_ratio = max_image_size / float(hi)
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hi = int(image_size / image_ratio) // BLOCK_SIZE * BLOCK_SIZE + delta
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delta *= 2
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max_image_size = size_calculator(hi)
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partition_size = hi
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# Start to binary search.
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while lo < hi:
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mid = ((lo + hi) // (2 * BLOCK_SIZE)) * BLOCK_SIZE
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max_image_size = size_calculator(mid)
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if max_image_size >= image_size: # if mid can accommodate image_size
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if mid < partition_size: # if a smaller partition size is found
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partition_size = mid
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hi = mid
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else:
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lo = mid + BLOCK_SIZE
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if OPTIONS.verbose:
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print("AVBCalcMinPartitionSize({}): partition_size: {}.".format(
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image_size, partition_size))
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return partition_size
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def AVBAddFooter(image_path, avbtool, footer_type, partition_size,
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partition_name, key_path, algorithm, salt,
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additional_args):
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"""Adds dm-verity hashtree and AVB metadata to an image.
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Args:
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image_path: Path to image to modify.
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avbtool: String with path to avbtool.
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footer_type: 'hash' or 'hashtree' for generating footer.
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partition_size: The size of the partition in question.
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partition_name: The name of the partition - will be embedded in metadata.
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key_path: Path to key to use or None.
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algorithm: Name of algorithm to use or None.
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salt: The salt to use (a hexadecimal string) or None.
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additional_args: Additional arguments to pass to "avbtool add_hash_footer"
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or "avbtool add_hashtree_footer".
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Raises:
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BuildImageError: On error.
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"""
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cmd = [avbtool, "add_%s_footer" % footer_type,
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"--partition_size", partition_size,
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"--partition_name", partition_name,
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"--image", image_path]
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if key_path and algorithm:
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cmd.extend(["--key", key_path, "--algorithm", algorithm])
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if salt:
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cmd.extend(["--salt", salt])
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cmd.extend(shlex.split(additional_args))
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output, exit_code = RunCommand(cmd)
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if exit_code != 0:
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raise BuildImageError(
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"Failed to add AVB footer:\n{}".format(output))
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def AdjustPartitionSizeForVerity(partition_size, fec_supported):
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"""Modifies the provided partition size to account for the verity metadata.
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This information is used to size the created image appropriately.
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Args:
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partition_size: the size of the partition to be verified.
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Returns:
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A tuple of the size of the partition adjusted for verity metadata, and
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the size of verity metadata.
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"""
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key = "%d %d" % (partition_size, fec_supported)
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if key in AdjustPartitionSizeForVerity.results:
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return AdjustPartitionSizeForVerity.results[key]
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hi = partition_size
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if hi % BLOCK_SIZE != 0:
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hi = (hi // BLOCK_SIZE) * BLOCK_SIZE
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# verity tree and fec sizes depend on the partition size, which
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# means this estimate is always going to be unnecessarily small
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verity_size = GetVeritySize(hi, fec_supported)
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lo = partition_size - verity_size
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result = lo
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# do a binary search for the optimal size
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while lo < hi:
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i = ((lo + hi) // (2 * BLOCK_SIZE)) * BLOCK_SIZE
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v = GetVeritySize(i, fec_supported)
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if i + v <= partition_size:
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if result < i:
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result = i
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verity_size = v
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lo = i + BLOCK_SIZE
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else:
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hi = i
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if OPTIONS.verbose:
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print("Adjusted partition size for verity, partition_size: {},"
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" verity_size: {}".format(result, verity_size))
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AdjustPartitionSizeForVerity.results[key] = (result, verity_size)
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return (result, verity_size)
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AdjustPartitionSizeForVerity.results = {}
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def BuildVerityFEC(sparse_image_path, verity_path, verity_fec_path,
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padding_size):
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cmd = ["fec", "-e", "-p", str(padding_size), sparse_image_path,
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verity_path, verity_fec_path]
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output, exit_code = RunCommand(cmd)
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if exit_code != 0:
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raise BuildImageError(
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"Failed to build FEC data:\n{}".format(output))
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def BuildVerityTree(sparse_image_path, verity_image_path, prop_dict):
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cmd = ["build_verity_tree", "-A", FIXED_SALT, sparse_image_path,
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verity_image_path]
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output, exit_code = RunCommand(cmd)
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if exit_code != 0:
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raise BuildImageError(
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"Failed to build verity tree:\n{}".format(output))
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root, salt = output.split()
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prop_dict["verity_root_hash"] = root
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prop_dict["verity_salt"] = salt
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def BuildVerityMetadata(image_size, verity_metadata_path, root_hash, salt,
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block_device, signer_path, key, signer_args,
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verity_disable):
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cmd = ["build_verity_metadata.py", "build", str(image_size),
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verity_metadata_path, root_hash, salt, block_device, signer_path, key]
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if signer_args:
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cmd.append("--signer_args=\"%s\"" % (' '.join(signer_args),))
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if verity_disable:
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cmd.append("--verity_disable")
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output, exit_code = RunCommand(cmd)
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if exit_code != 0:
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raise BuildImageError(
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"Failed to build verity metadata:\n{}".format(output))
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def Append2Simg(sparse_image_path, unsparse_image_path, error_message):
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"""Appends the unsparse image to the given sparse image.
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Args:
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sparse_image_path: the path to the (sparse) image
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unsparse_image_path: the path to the (unsparse) image
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Raises:
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BuildImageError: On error.
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"""
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cmd = ["append2simg", sparse_image_path, unsparse_image_path]
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output, exit_code = RunCommand(cmd)
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if exit_code != 0:
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raise BuildImageError("{}:\n{}".format(error_message, output))
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def Append(target, file_to_append, error_message):
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"""Appends file_to_append to target.
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Raises:
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BuildImageError: On error.
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"""
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try:
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with open(target, "a") as out_file, open(file_to_append, "r") as input_file:
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for line in input_file:
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out_file.write(line)
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except IOError:
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raise BuildImageError(error_message)
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def BuildVerifiedImage(data_image_path, verity_image_path,
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verity_metadata_path, verity_fec_path,
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padding_size, fec_supported):
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Append(
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verity_image_path, verity_metadata_path,
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"Could not append verity metadata!")
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if fec_supported:
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# Build FEC for the entire partition, including metadata.
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BuildVerityFEC(
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data_image_path, verity_image_path, verity_fec_path, padding_size)
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Append(verity_image_path, verity_fec_path, "Could not append FEC!")
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Append2Simg(
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data_image_path, verity_image_path, "Could not append verity data!")
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def UnsparseImage(sparse_image_path, replace=True):
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img_dir = os.path.dirname(sparse_image_path)
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unsparse_image_path = "unsparse_" + os.path.basename(sparse_image_path)
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unsparse_image_path = os.path.join(img_dir, unsparse_image_path)
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if os.path.exists(unsparse_image_path):
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if replace:
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os.unlink(unsparse_image_path)
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else:
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return unsparse_image_path
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inflate_command = ["simg2img", sparse_image_path, unsparse_image_path]
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inflate_output, exit_code = RunCommand(inflate_command)
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if exit_code != 0:
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os.remove(unsparse_image_path)
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raise BuildImageError(
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"Error: '{}' failed with exit code {}:\n{}".format(
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inflate_command, exit_code, inflate_output))
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return unsparse_image_path
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def MakeVerityEnabledImage(out_file, fec_supported, prop_dict):
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"""Creates an image that is verifiable using dm-verity.
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Args:
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out_file: the location to write the verifiable image at
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prop_dict: a dictionary of properties required for image creation and
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verification
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Raises:
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AssertionError: On invalid partition sizes.
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BuildImageError: On other errors.
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"""
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# get properties
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image_size = int(prop_dict["image_size"])
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block_dev = prop_dict["verity_block_device"]
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signer_key = prop_dict["verity_key"] + ".pk8"
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if OPTIONS.verity_signer_path is not None:
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signer_path = OPTIONS.verity_signer_path
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else:
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signer_path = prop_dict["verity_signer_cmd"]
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signer_args = OPTIONS.verity_signer_args
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tempdir_name = common.MakeTempDir(suffix="_verity_images")
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# Get partial image paths.
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verity_image_path = os.path.join(tempdir_name, "verity.img")
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verity_metadata_path = os.path.join(tempdir_name, "verity_metadata.img")
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verity_fec_path = os.path.join(tempdir_name, "verity_fec.img")
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# Build the verity tree and get the root hash and salt.
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BuildVerityTree(out_file, verity_image_path, prop_dict)
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# Build the metadata blocks.
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root_hash = prop_dict["verity_root_hash"]
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salt = prop_dict["verity_salt"]
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verity_disable = "verity_disable" in prop_dict
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BuildVerityMetadata(
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image_size, verity_metadata_path, root_hash, salt, block_dev, signer_path,
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signer_key, signer_args, verity_disable)
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# Build the full verified image.
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partition_size = int(prop_dict["partition_size"])
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verity_size = int(prop_dict["verity_size"])
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padding_size = partition_size - image_size - verity_size
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assert padding_size >= 0
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BuildVerifiedImage(
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out_file, verity_image_path, verity_metadata_path, verity_fec_path,
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padding_size, fec_supported)
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def ConvertBlockMapToBaseFs(block_map_file):
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base_fs_file = common.MakeTempFile(prefix="script_gen_", suffix=".base_fs")
|
|
convert_command = ["blk_alloc_to_base_fs", block_map_file, base_fs_file]
|
|
output, exit_code = RunCommand(convert_command)
|
|
if exit_code != 0:
|
|
raise BuildImageError(
|
|
"Failed to call blk_alloc_to_base_fs:\n{}".format(output))
|
|
return base_fs_file
|
|
|
|
|
|
def SetUpInDirAndFsConfig(origin_in, prop_dict):
|
|
"""Returns the in_dir and fs_config that should be used for image building.
|
|
|
|
When building system.img for all targets, it creates and returns a staged dir
|
|
that combines the contents of /system (i.e. in the given in_dir) and root.
|
|
|
|
Args:
|
|
origin_in: Path to the input directory.
|
|
prop_dict: A property dict that contains info like partition size. Values
|
|
may be updated.
|
|
|
|
Returns:
|
|
A tuple of in_dir and fs_config that should be used to build the image.
|
|
"""
|
|
fs_config = prop_dict.get("fs_config")
|
|
|
|
if prop_dict["mount_point"] == "system_other":
|
|
prop_dict["mount_point"] = "system"
|
|
return origin_in, fs_config
|
|
|
|
if prop_dict["mount_point"] != "system":
|
|
return origin_in, fs_config
|
|
|
|
# Construct a staging directory of the root file system.
|
|
in_dir = common.MakeTempDir()
|
|
root_dir = prop_dict.get("root_dir")
|
|
if root_dir:
|
|
shutil.rmtree(in_dir)
|
|
shutil.copytree(root_dir, in_dir, symlinks=True)
|
|
in_dir_system = os.path.join(in_dir, "system")
|
|
shutil.rmtree(in_dir_system, ignore_errors=True)
|
|
shutil.copytree(origin_in, in_dir_system, symlinks=True)
|
|
|
|
# Change the mount point to "/".
|
|
prop_dict["mount_point"] = "/"
|
|
if fs_config:
|
|
# We need to merge the fs_config files of system and root.
|
|
merged_fs_config = common.MakeTempFile(
|
|
prefix="merged_fs_config", suffix=".txt")
|
|
with open(merged_fs_config, "w") as fw:
|
|
if "root_fs_config" in prop_dict:
|
|
with open(prop_dict["root_fs_config"]) as fr:
|
|
fw.writelines(fr.readlines())
|
|
with open(fs_config) as fr:
|
|
fw.writelines(fr.readlines())
|
|
fs_config = merged_fs_config
|
|
return in_dir, fs_config
|
|
|
|
|
|
def CheckHeadroom(ext4fs_output, prop_dict):
|
|
"""Checks if there's enough headroom space available.
|
|
|
|
Headroom is the reserved space on system image (via PRODUCT_SYSTEM_HEADROOM),
|
|
which is useful for devices with low disk space that have system image
|
|
variation between builds. The 'partition_headroom' in prop_dict is the size
|
|
in bytes, while the numbers in 'ext4fs_output' are for 4K-blocks.
|
|
|
|
Args:
|
|
ext4fs_output: The output string from mke2fs command.
|
|
prop_dict: The property dict.
|
|
|
|
Raises:
|
|
AssertionError: On invalid input.
|
|
BuildImageError: On check failure.
|
|
"""
|
|
assert ext4fs_output is not None
|
|
assert prop_dict.get('fs_type', '').startswith('ext4')
|
|
assert 'partition_headroom' in prop_dict
|
|
assert 'mount_point' in prop_dict
|
|
|
|
ext4fs_stats = re.compile(
|
|
r'Created filesystem with .* (?P<used_blocks>[0-9]+)/'
|
|
r'(?P<total_blocks>[0-9]+) blocks')
|
|
last_line = ext4fs_output.strip().split('\n')[-1]
|
|
m = ext4fs_stats.match(last_line)
|
|
used_blocks = int(m.groupdict().get('used_blocks'))
|
|
total_blocks = int(m.groupdict().get('total_blocks'))
|
|
headroom_blocks = int(prop_dict['partition_headroom']) / BLOCK_SIZE
|
|
adjusted_blocks = total_blocks - headroom_blocks
|
|
if used_blocks > adjusted_blocks:
|
|
mount_point = prop_dict["mount_point"]
|
|
raise BuildImageError(
|
|
"Error: Not enough room on {} (total: {} blocks, used: {} blocks, "
|
|
"headroom: {} blocks, available: {} blocks)".format(
|
|
mount_point, total_blocks, used_blocks, headroom_blocks,
|
|
adjusted_blocks))
|
|
|
|
|
|
def BuildImage(in_dir, prop_dict, out_file, target_out=None):
|
|
"""Builds an image for the files under in_dir and writes it to out_file.
|
|
|
|
Args:
|
|
in_dir: Path to input directory.
|
|
prop_dict: A property dict that contains info like partition size. Values
|
|
will be updated with computed values.
|
|
out_file: The output image file.
|
|
target_out: Path to the TARGET_OUT directory as in Makefile. It actually
|
|
points to the /system directory under PRODUCT_OUT. fs_config (the one
|
|
under system/core/libcutils) reads device specific FS config files from
|
|
there.
|
|
|
|
Raises:
|
|
BuildImageError: On build image failures.
|
|
"""
|
|
in_dir, fs_config = SetUpInDirAndFsConfig(in_dir, prop_dict)
|
|
|
|
build_command = []
|
|
fs_type = prop_dict.get("fs_type", "")
|
|
run_e2fsck = False
|
|
|
|
fs_spans_partition = True
|
|
if fs_type.startswith("squash"):
|
|
fs_spans_partition = False
|
|
|
|
is_verity_partition = "verity_block_device" in prop_dict
|
|
verity_supported = prop_dict.get("verity") == "true"
|
|
verity_fec_supported = prop_dict.get("verity_fec") == "true"
|
|
|
|
avb_footer_type = None
|
|
if prop_dict.get("avb_hash_enable") == "true":
|
|
avb_footer_type = "hash"
|
|
elif prop_dict.get("avb_hashtree_enable") == "true":
|
|
avb_footer_type = "hashtree"
|
|
|
|
if avb_footer_type:
|
|
avbtool = prop_dict.get("avb_avbtool")
|
|
avb_signing_args = prop_dict.get(
|
|
"avb_add_" + avb_footer_type + "_footer_args")
|
|
|
|
if (prop_dict.get("use_dynamic_partition_size") == "true" and
|
|
"partition_size" not in prop_dict):
|
|
# If partition_size is not defined, use output of `du' + reserved_size.
|
|
size = GetDiskUsage(in_dir)
|
|
if OPTIONS.verbose:
|
|
print("The tree size of %s is %d MB." % (in_dir, size // BYTES_IN_MB))
|
|
size += int(prop_dict.get("partition_reserved_size", 0))
|
|
# Round this up to a multiple of 4K so that avbtool works
|
|
size = common.RoundUpTo4K(size)
|
|
# Adjust partition_size to add more space for AVB footer, to prevent
|
|
# it from consuming partition_reserved_size.
|
|
if avb_footer_type:
|
|
size = AVBCalcMinPartitionSize(
|
|
size,
|
|
lambda x: AVBCalcMaxImageSize(
|
|
avbtool, avb_footer_type, x, avb_signing_args))
|
|
prop_dict["partition_size"] = str(size)
|
|
if OPTIONS.verbose:
|
|
print("Allocating %d MB for %s." % (size // BYTES_IN_MB, out_file))
|
|
|
|
prop_dict["image_size"] = prop_dict["partition_size"]
|
|
|
|
# Adjust the image size to make room for the hashes if this is to be verified.
|
|
if verity_supported and is_verity_partition:
|
|
partition_size = int(prop_dict.get("partition_size"))
|
|
image_size, verity_size = AdjustPartitionSizeForVerity(
|
|
partition_size, verity_fec_supported)
|
|
prop_dict["image_size"] = str(image_size)
|
|
prop_dict["verity_size"] = str(verity_size)
|
|
|
|
# Adjust the image size for AVB hash footer or AVB hashtree footer.
|
|
if avb_footer_type:
|
|
partition_size = prop_dict["partition_size"]
|
|
# avb_add_hash_footer_args or avb_add_hashtree_footer_args.
|
|
max_image_size = AVBCalcMaxImageSize(
|
|
avbtool, avb_footer_type, partition_size, avb_signing_args)
|
|
prop_dict["image_size"] = str(max_image_size)
|
|
|
|
if fs_type.startswith("ext"):
|
|
build_command = [prop_dict["ext_mkuserimg"]]
|
|
if "extfs_sparse_flag" in prop_dict:
|
|
build_command.append(prop_dict["extfs_sparse_flag"])
|
|
run_e2fsck = True
|
|
build_command.extend([in_dir, out_file, fs_type,
|
|
prop_dict["mount_point"]])
|
|
build_command.append(prop_dict["image_size"])
|
|
if "journal_size" in prop_dict:
|
|
build_command.extend(["-j", prop_dict["journal_size"]])
|
|
if "timestamp" in prop_dict:
|
|
build_command.extend(["-T", str(prop_dict["timestamp"])])
|
|
if fs_config:
|
|
build_command.extend(["-C", fs_config])
|
|
if target_out:
|
|
build_command.extend(["-D", target_out])
|
|
if "block_list" in prop_dict:
|
|
build_command.extend(["-B", prop_dict["block_list"]])
|
|
if "base_fs_file" in prop_dict:
|
|
base_fs_file = ConvertBlockMapToBaseFs(prop_dict["base_fs_file"])
|
|
build_command.extend(["-d", base_fs_file])
|
|
build_command.extend(["-L", prop_dict["mount_point"]])
|
|
if "extfs_inode_count" in prop_dict:
|
|
build_command.extend(["-i", prop_dict["extfs_inode_count"]])
|
|
if "extfs_rsv_pct" in prop_dict:
|
|
build_command.extend(["-M", prop_dict["extfs_rsv_pct"]])
|
|
if "flash_erase_block_size" in prop_dict:
|
|
build_command.extend(["-e", prop_dict["flash_erase_block_size"]])
|
|
if "flash_logical_block_size" in prop_dict:
|
|
build_command.extend(["-o", prop_dict["flash_logical_block_size"]])
|
|
# Specify UUID and hash_seed if using mke2fs.
|
|
if prop_dict["ext_mkuserimg"] == "mkuserimg_mke2fs":
|
|
if "uuid" in prop_dict:
|
|
build_command.extend(["-U", prop_dict["uuid"]])
|
|
if "hash_seed" in prop_dict:
|
|
build_command.extend(["-S", prop_dict["hash_seed"]])
|
|
if "ext4_share_dup_blocks" in prop_dict:
|
|
build_command.append("-c")
|
|
if "selinux_fc" in prop_dict:
|
|
build_command.append(prop_dict["selinux_fc"])
|
|
elif fs_type.startswith("squash"):
|
|
build_command = ["mksquashfsimage.sh"]
|
|
build_command.extend([in_dir, out_file])
|
|
if "squashfs_sparse_flag" in prop_dict:
|
|
build_command.extend([prop_dict["squashfs_sparse_flag"]])
|
|
build_command.extend(["-m", prop_dict["mount_point"]])
|
|
if target_out:
|
|
build_command.extend(["-d", target_out])
|
|
if fs_config:
|
|
build_command.extend(["-C", fs_config])
|
|
if "selinux_fc" in prop_dict:
|
|
build_command.extend(["-c", prop_dict["selinux_fc"]])
|
|
if "block_list" in prop_dict:
|
|
build_command.extend(["-B", prop_dict["block_list"]])
|
|
if "squashfs_block_size" in prop_dict:
|
|
build_command.extend(["-b", prop_dict["squashfs_block_size"]])
|
|
if "squashfs_compressor" in prop_dict:
|
|
build_command.extend(["-z", prop_dict["squashfs_compressor"]])
|
|
if "squashfs_compressor_opt" in prop_dict:
|
|
build_command.extend(["-zo", prop_dict["squashfs_compressor_opt"]])
|
|
if prop_dict.get("squashfs_disable_4k_align") == "true":
|
|
build_command.extend(["-a"])
|
|
elif fs_type.startswith("f2fs"):
|
|
build_command = ["mkf2fsuserimg.sh"]
|
|
build_command.extend([out_file, prop_dict["image_size"]])
|
|
if fs_config:
|
|
build_command.extend(["-C", fs_config])
|
|
build_command.extend(["-f", in_dir])
|
|
if target_out:
|
|
build_command.extend(["-D", target_out])
|
|
if "selinux_fc" in prop_dict:
|
|
build_command.extend(["-s", prop_dict["selinux_fc"]])
|
|
build_command.extend(["-t", prop_dict["mount_point"]])
|
|
if "timestamp" in prop_dict:
|
|
build_command.extend(["-T", str(prop_dict["timestamp"])])
|
|
build_command.extend(["-L", prop_dict["mount_point"]])
|
|
else:
|
|
raise BuildImageError(
|
|
"Error: unknown filesystem type: {}".format(fs_type))
|
|
|
|
mkfs_output, exit_code = RunCommand(build_command)
|
|
if exit_code != 0:
|
|
try:
|
|
du = GetDiskUsage(in_dir)
|
|
du_str = "{} bytes ({} MB)".format(du, du // BYTES_IN_MB)
|
|
except BuildImageError as e:
|
|
print(e, file=sys.stderr)
|
|
du_str = "unknown"
|
|
print(
|
|
"Out of space? The tree size of {} is {}, with reserved space of {} "
|
|
"bytes ({} MB).".format(
|
|
in_dir, du_str,
|
|
int(prop_dict.get("partition_reserved_size", 0)),
|
|
int(prop_dict.get("partition_reserved_size", 0)) // BYTES_IN_MB))
|
|
print(
|
|
"The max image size for filsystem files is {} bytes ({} MB), out of a "
|
|
"total partition size of {} bytes ({} MB).".format(
|
|
int(prop_dict["image_size"]),
|
|
int(prop_dict["image_size"]) // BYTES_IN_MB,
|
|
int(prop_dict["partition_size"]),
|
|
int(prop_dict["partition_size"]) // BYTES_IN_MB))
|
|
|
|
raise BuildImageError(
|
|
"Error: '{}' failed with exit code {}:\n{}".format(
|
|
build_command, exit_code, mkfs_output))
|
|
|
|
# Check if there's enough headroom space available for ext4 image.
|
|
if "partition_headroom" in prop_dict and fs_type.startswith("ext4"):
|
|
CheckHeadroom(mkfs_output, prop_dict)
|
|
|
|
if not fs_spans_partition:
|
|
mount_point = prop_dict.get("mount_point")
|
|
image_size = int(prop_dict["image_size"])
|
|
sparse_image_size = GetSimgSize(out_file)
|
|
if sparse_image_size > image_size:
|
|
raise BuildImageError(
|
|
"Error: {} image size of {} is larger than partition size of "
|
|
"{}".format(mount_point, sparse_image_size, image_size))
|
|
if verity_supported and is_verity_partition:
|
|
ZeroPadSimg(out_file, image_size - sparse_image_size)
|
|
|
|
# Create the verified image if this is to be verified.
|
|
if verity_supported and is_verity_partition:
|
|
MakeVerityEnabledImage(out_file, verity_fec_supported, prop_dict)
|
|
|
|
# Add AVB HASH or HASHTREE footer (metadata).
|
|
if avb_footer_type:
|
|
partition_size = prop_dict["partition_size"]
|
|
partition_name = prop_dict["partition_name"]
|
|
# key_path and algorithm are only available when chain partition is used.
|
|
key_path = prop_dict.get("avb_key_path")
|
|
algorithm = prop_dict.get("avb_algorithm")
|
|
salt = prop_dict.get("avb_salt")
|
|
AVBAddFooter(
|
|
out_file, avbtool, avb_footer_type, partition_size, partition_name,
|
|
key_path, algorithm, salt, avb_signing_args)
|
|
|
|
if run_e2fsck and prop_dict.get("skip_fsck") != "true":
|
|
unsparse_image = UnsparseImage(out_file, replace=False)
|
|
|
|
# Run e2fsck on the inflated image file
|
|
e2fsck_command = ["e2fsck", "-f", "-n", unsparse_image]
|
|
# TODO(b/112062612): work around e2fsck failure with SANITIZE_HOST=address
|
|
env4e2fsck = {"ASAN_OPTIONS": "detect_odr_violation=0"}
|
|
e2fsck_output, exit_code = RunCommand(e2fsck_command, env=env4e2fsck)
|
|
|
|
os.remove(unsparse_image)
|
|
|
|
if exit_code != 0:
|
|
raise BuildImageError(
|
|
"Error: '{}' failed with exit code {}:\n{}".format(
|
|
e2fsck_command, exit_code, e2fsck_output))
|
|
|
|
|
|
def ImagePropFromGlobalDict(glob_dict, mount_point):
|
|
"""Build an image property dictionary from the global dictionary.
|
|
|
|
Args:
|
|
glob_dict: the global dictionary from the build system.
|
|
mount_point: such as "system", "data" etc.
|
|
"""
|
|
d = {}
|
|
|
|
if "build.prop" in glob_dict:
|
|
bp = glob_dict["build.prop"]
|
|
if "ro.build.date.utc" in bp:
|
|
d["timestamp"] = bp["ro.build.date.utc"]
|
|
|
|
def copy_prop(src_p, dest_p):
|
|
"""Copy a property from the global dictionary.
|
|
|
|
Args:
|
|
src_p: The source property in the global dictionary.
|
|
dest_p: The destination property.
|
|
Returns:
|
|
True if property was found and copied, False otherwise.
|
|
"""
|
|
if src_p in glob_dict:
|
|
d[dest_p] = str(glob_dict[src_p])
|
|
return True
|
|
return False
|
|
|
|
common_props = (
|
|
"extfs_sparse_flag",
|
|
"squashfs_sparse_flag",
|
|
"selinux_fc",
|
|
"skip_fsck",
|
|
"ext_mkuserimg",
|
|
"verity",
|
|
"verity_key",
|
|
"verity_signer_cmd",
|
|
"verity_fec",
|
|
"verity_disable",
|
|
"avb_enable",
|
|
"avb_avbtool",
|
|
"avb_salt",
|
|
"use_dynamic_partition_size",
|
|
)
|
|
for p in common_props:
|
|
copy_prop(p, p)
|
|
|
|
d["mount_point"] = mount_point
|
|
if mount_point == "system":
|
|
copy_prop("avb_system_hashtree_enable", "avb_hashtree_enable")
|
|
copy_prop("avb_system_add_hashtree_footer_args",
|
|
"avb_add_hashtree_footer_args")
|
|
copy_prop("avb_system_key_path", "avb_key_path")
|
|
copy_prop("avb_system_algorithm", "avb_algorithm")
|
|
copy_prop("fs_type", "fs_type")
|
|
# Copy the generic system fs type first, override with specific one if
|
|
# available.
|
|
copy_prop("system_fs_type", "fs_type")
|
|
copy_prop("system_headroom", "partition_headroom")
|
|
copy_prop("system_size", "partition_size")
|
|
if not copy_prop("system_journal_size", "journal_size"):
|
|
d["journal_size"] = "0"
|
|
copy_prop("system_verity_block_device", "verity_block_device")
|
|
copy_prop("system_root_image", "system_root_image")
|
|
copy_prop("root_dir", "root_dir")
|
|
copy_prop("root_fs_config", "root_fs_config")
|
|
copy_prop("ext4_share_dup_blocks", "ext4_share_dup_blocks")
|
|
copy_prop("system_squashfs_compressor", "squashfs_compressor")
|
|
copy_prop("system_squashfs_compressor_opt", "squashfs_compressor_opt")
|
|
copy_prop("system_squashfs_block_size", "squashfs_block_size")
|
|
copy_prop("system_squashfs_disable_4k_align", "squashfs_disable_4k_align")
|
|
copy_prop("system_base_fs_file", "base_fs_file")
|
|
copy_prop("system_extfs_inode_count", "extfs_inode_count")
|
|
if not copy_prop("system_extfs_rsv_pct", "extfs_rsv_pct"):
|
|
d["extfs_rsv_pct"] = "0"
|
|
copy_prop("system_reserved_size", "partition_reserved_size")
|
|
elif mount_point == "system_other":
|
|
# We inherit the selinux policies of /system since we contain some of its
|
|
# files.
|
|
copy_prop("avb_system_hashtree_enable", "avb_hashtree_enable")
|
|
copy_prop("avb_system_add_hashtree_footer_args",
|
|
"avb_add_hashtree_footer_args")
|
|
copy_prop("avb_system_key_path", "avb_key_path")
|
|
copy_prop("avb_system_algorithm", "avb_algorithm")
|
|
copy_prop("fs_type", "fs_type")
|
|
copy_prop("system_fs_type", "fs_type")
|
|
copy_prop("system_size", "partition_size")
|
|
if not copy_prop("system_journal_size", "journal_size"):
|
|
d["journal_size"] = "0"
|
|
copy_prop("system_verity_block_device", "verity_block_device")
|
|
copy_prop("system_squashfs_compressor", "squashfs_compressor")
|
|
copy_prop("system_squashfs_compressor_opt", "squashfs_compressor_opt")
|
|
copy_prop("system_squashfs_block_size", "squashfs_block_size")
|
|
copy_prop("system_base_fs_file", "base_fs_file")
|
|
copy_prop("system_extfs_inode_count", "extfs_inode_count")
|
|
if not copy_prop("system_extfs_rsv_pct", "extfs_rsv_pct"):
|
|
d["extfs_rsv_pct"] = "0"
|
|
copy_prop("system_reserved_size", "partition_reserved_size")
|
|
elif mount_point == "data":
|
|
# Copy the generic fs type first, override with specific one if available.
|
|
copy_prop("fs_type", "fs_type")
|
|
copy_prop("userdata_fs_type", "fs_type")
|
|
copy_prop("userdata_size", "partition_size")
|
|
copy_prop("flash_logical_block_size", "flash_logical_block_size")
|
|
copy_prop("flash_erase_block_size", "flash_erase_block_size")
|
|
elif mount_point == "cache":
|
|
copy_prop("cache_fs_type", "fs_type")
|
|
copy_prop("cache_size", "partition_size")
|
|
elif mount_point == "vendor":
|
|
copy_prop("avb_vendor_hashtree_enable", "avb_hashtree_enable")
|
|
copy_prop("avb_vendor_add_hashtree_footer_args",
|
|
"avb_add_hashtree_footer_args")
|
|
copy_prop("avb_vendor_key_path", "avb_key_path")
|
|
copy_prop("avb_vendor_algorithm", "avb_algorithm")
|
|
copy_prop("vendor_fs_type", "fs_type")
|
|
copy_prop("vendor_size", "partition_size")
|
|
if not copy_prop("vendor_journal_size", "journal_size"):
|
|
d["journal_size"] = "0"
|
|
copy_prop("vendor_verity_block_device", "verity_block_device")
|
|
copy_prop("ext4_share_dup_blocks", "ext4_share_dup_blocks")
|
|
copy_prop("vendor_squashfs_compressor", "squashfs_compressor")
|
|
copy_prop("vendor_squashfs_compressor_opt", "squashfs_compressor_opt")
|
|
copy_prop("vendor_squashfs_block_size", "squashfs_block_size")
|
|
copy_prop("vendor_squashfs_disable_4k_align", "squashfs_disable_4k_align")
|
|
copy_prop("vendor_base_fs_file", "base_fs_file")
|
|
copy_prop("vendor_extfs_inode_count", "extfs_inode_count")
|
|
if not copy_prop("vendor_extfs_rsv_pct", "extfs_rsv_pct"):
|
|
d["extfs_rsv_pct"] = "0"
|
|
copy_prop("vendor_reserved_size", "partition_reserved_size")
|
|
elif mount_point == "product":
|
|
copy_prop("avb_product_hashtree_enable", "avb_hashtree_enable")
|
|
copy_prop("avb_product_add_hashtree_footer_args",
|
|
"avb_add_hashtree_footer_args")
|
|
copy_prop("avb_product_key_path", "avb_key_path")
|
|
copy_prop("avb_product_algorithm", "avb_algorithm")
|
|
copy_prop("product_fs_type", "fs_type")
|
|
copy_prop("product_size", "partition_size")
|
|
if not copy_prop("product_journal_size", "journal_size"):
|
|
d["journal_size"] = "0"
|
|
copy_prop("product_verity_block_device", "verity_block_device")
|
|
copy_prop("product_squashfs_compressor", "squashfs_compressor")
|
|
copy_prop("product_squashfs_compressor_opt", "squashfs_compressor_opt")
|
|
copy_prop("product_squashfs_block_size", "squashfs_block_size")
|
|
copy_prop("product_squashfs_disable_4k_align", "squashfs_disable_4k_align")
|
|
copy_prop("product_base_fs_file", "base_fs_file")
|
|
copy_prop("product_extfs_inode_count", "extfs_inode_count")
|
|
if not copy_prop("product_extfs_rsv_pct", "extfs_rsv_pct"):
|
|
d["extfs_rsv_pct"] = "0"
|
|
copy_prop("product_reserved_size", "partition_reserved_size")
|
|
elif mount_point == "product_services":
|
|
copy_prop("avb_product_services_hashtree_enable", "avb_hashtree_enable")
|
|
copy_prop("avb_product_services_add_hashtree_footer_args",
|
|
"avb_add_hashtree_footer_args")
|
|
copy_prop("avb_product_services_key_path", "avb_key_path")
|
|
copy_prop("avb_product_services_algorithm", "avb_algorithm")
|
|
copy_prop("product_services_fs_type", "fs_type")
|
|
copy_prop("product_services_size", "partition_size")
|
|
if not copy_prop("product_services_journal_size", "journal_size"):
|
|
d["journal_size"] = "0"
|
|
copy_prop("product_services_verity_block_device", "verity_block_device")
|
|
copy_prop("product_services_squashfs_compressor", "squashfs_compressor")
|
|
copy_prop("product_services_squashfs_compressor_opt",
|
|
"squashfs_compressor_opt")
|
|
copy_prop("product_services_squashfs_block_size", "squashfs_block_size")
|
|
copy_prop("product_services_squashfs_disable_4k_align",
|
|
"squashfs_disable_4k_align")
|
|
copy_prop("product_services_base_fs_file", "base_fs_file")
|
|
copy_prop("product_services_extfs_inode_count", "extfs_inode_count")
|
|
if not copy_prop("product_services_extfs_rsv_pct", "extfs_rsv_pct"):
|
|
d["extfs_rsv_pct"] = "0"
|
|
copy_prop("product_services_reserved_size", "partition_reserved_size")
|
|
elif mount_point == "odm":
|
|
copy_prop("avb_odm_hashtree_enable", "avb_hashtree_enable")
|
|
copy_prop("avb_odm_add_hashtree_footer_args",
|
|
"avb_add_hashtree_footer_args")
|
|
copy_prop("avb_odm_key_path", "avb_key_path")
|
|
copy_prop("avb_odm_algorithm", "avb_algorithm")
|
|
copy_prop("odm_fs_type", "fs_type")
|
|
copy_prop("odm_size", "partition_size")
|
|
if not copy_prop("odm_journal_size", "journal_size"):
|
|
d["journal_size"] = "0"
|
|
copy_prop("odm_verity_block_device", "verity_block_device")
|
|
copy_prop("odm_squashfs_compressor", "squashfs_compressor")
|
|
copy_prop("odm_squashfs_compressor_opt", "squashfs_compressor_opt")
|
|
copy_prop("odm_squashfs_block_size", "squashfs_block_size")
|
|
copy_prop("odm_squashfs_disable_4k_align", "squashfs_disable_4k_align")
|
|
copy_prop("odm_base_fs_file", "base_fs_file")
|
|
copy_prop("odm_extfs_inode_count", "extfs_inode_count")
|
|
if not copy_prop("odm_extfs_rsv_pct", "extfs_rsv_pct"):
|
|
d["extfs_rsv_pct"] = "0"
|
|
copy_prop("odm_reserved_size", "partition_reserved_size")
|
|
elif mount_point == "oem":
|
|
copy_prop("fs_type", "fs_type")
|
|
copy_prop("oem_size", "partition_size")
|
|
if not copy_prop("oem_journal_size", "journal_size"):
|
|
d["journal_size"] = "0"
|
|
copy_prop("oem_extfs_inode_count", "extfs_inode_count")
|
|
if not copy_prop("oem_extfs_rsv_pct", "extfs_rsv_pct"):
|
|
d["extfs_rsv_pct"] = "0"
|
|
d["partition_name"] = mount_point
|
|
return d
|
|
|
|
|
|
def LoadGlobalDict(filename):
|
|
"""Load "name=value" pairs from filename"""
|
|
d = {}
|
|
f = open(filename)
|
|
for line in f:
|
|
line = line.strip()
|
|
if not line or line.startswith("#"):
|
|
continue
|
|
k, v = line.split("=", 1)
|
|
d[k] = v
|
|
f.close()
|
|
return d
|
|
|
|
|
|
def GlobalDictFromImageProp(image_prop, mount_point):
|
|
d = {}
|
|
def copy_prop(src_p, dest_p):
|
|
if src_p in image_prop:
|
|
d[dest_p] = image_prop[src_p]
|
|
return True
|
|
return False
|
|
|
|
if mount_point == "system":
|
|
copy_prop("partition_size", "system_size")
|
|
elif mount_point == "system_other":
|
|
copy_prop("partition_size", "system_size")
|
|
elif mount_point == "vendor":
|
|
copy_prop("partition_size", "vendor_size")
|
|
elif mount_point == "odm":
|
|
copy_prop("partition_size", "odm_size")
|
|
elif mount_point == "product":
|
|
copy_prop("partition_size", "product_size")
|
|
elif mount_point == "product_services":
|
|
copy_prop("partition_size", "product_services_size")
|
|
return d
|
|
|
|
|
|
def SaveGlobalDict(filename, glob_dict):
|
|
with open(filename, "w") as f:
|
|
f.writelines(["%s=%s" % (key, value) for (key, value) in glob_dict.items()])
|
|
|
|
|
|
def main(argv):
|
|
if len(argv) < 4 or len(argv) > 5:
|
|
print(__doc__)
|
|
sys.exit(1)
|
|
|
|
in_dir = argv[0]
|
|
glob_dict_file = argv[1]
|
|
out_file = argv[2]
|
|
target_out = argv[3]
|
|
prop_file_out = argv[4] if len(argv) >= 5 else None
|
|
|
|
glob_dict = LoadGlobalDict(glob_dict_file)
|
|
if "mount_point" in glob_dict:
|
|
# The caller knows the mount point and provides a dictionay needed by
|
|
# BuildImage().
|
|
image_properties = glob_dict
|
|
else:
|
|
image_filename = os.path.basename(out_file)
|
|
mount_point = ""
|
|
if image_filename == "system.img":
|
|
mount_point = "system"
|
|
elif image_filename == "system_other.img":
|
|
mount_point = "system_other"
|
|
elif image_filename == "userdata.img":
|
|
mount_point = "data"
|
|
elif image_filename == "cache.img":
|
|
mount_point = "cache"
|
|
elif image_filename == "vendor.img":
|
|
mount_point = "vendor"
|
|
elif image_filename == "odm.img":
|
|
mount_point = "odm"
|
|
elif image_filename == "oem.img":
|
|
mount_point = "oem"
|
|
elif image_filename == "product.img":
|
|
mount_point = "product"
|
|
elif image_filename == "product_services.img":
|
|
mount_point = "product_services"
|
|
else:
|
|
print("error: unknown image file name ", image_filename, file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
image_properties = ImagePropFromGlobalDict(glob_dict, mount_point)
|
|
|
|
try:
|
|
BuildImage(in_dir, image_properties, out_file, target_out)
|
|
except:
|
|
print("Error: Failed to build {} from {}".format(out_file, in_dir),
|
|
file=sys.stderr)
|
|
raise
|
|
|
|
if prop_file_out:
|
|
glob_dict_out = GlobalDictFromImageProp(image_properties, mount_point)
|
|
SaveGlobalDict(prop_file_out, glob_dict_out)
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
main(sys.argv[1:])
|
|
finally:
|
|
common.Cleanup()
|