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Build repeatable system images with mke2fs.

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am: 87153c64fc

Change-Id: Id4eb7ceadab99d544be38194a9f88ef40ce23f2d
This commit is contained in:
Tao Bao 2017-09-28 04:16:11 +00:00 committed by android-build-merger
commit b14eaa572c
2 changed files with 20 additions and 0 deletions
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14
tools/releasetools/add_img_to_target_files.py
View file

@ -58,6 +58,7 @@ import shlex
import shutil
import subprocess
import tempfile
import uuid
import zipfile
import build_image
@ -257,6 +258,19 @@ def CreateImage(input_dir, info_dict, what, output_file, block_list=None):
if block_list:
image_props["block_list"] = block_list.name
# Use repeatable ext4 FS UUID and hash_seed UUID (based on partition name and
# build fingerprint).
uuid_seed = what + "-"
if "build.prop" in info_dict:
build_prop = info_dict["build.prop"]
if "ro.build.fingerprint" in build_prop:
uuid_seed += build_prop["ro.build.fingerprint"]
elif "ro.build.thumbprint" in build_prop:
uuid_seed += build_prop["ro.build.thumbprint"]
image_props["uuid"] = str(uuid.uuid5(uuid.NAMESPACE_URL, uuid_seed))
hash_seed = "hash_seed-" + uuid_seed
image_props["hash_seed"] = str(uuid.uuid5(uuid.NAMESPACE_URL, hash_seed))
succ = build_image.BuildImage(os.path.join(temp_dir, what),
image_props, output_file.name)
assert succ, "build " + what + ".img image failed"

6
tools/releasetools/build_image.py
View file

@ -475,6 +475,12 @@ def BuildImage(in_dir, prop_dict, out_file, target_out=None):
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.sh":
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 "selinux_fc" in prop_dict:
build_command.append(prop_dict["selinux_fc"])
elif fs_type.startswith("squash"):