Merge "Build repeatable system images with mke2fs."
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index 91213ba..1a08cb6 100755
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -59,6 +59,7 @@
import shutil
import subprocess
import tempfile
+import uuid
import zipfile
import build_image
@@ -258,6 +259,19 @@
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"
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 816cf4e..a388f8a 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -483,6 +483,12 @@
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"):
