class BlockDifference:
- def __init__(self, partition, tgt, src=None, check_first_block=False):
+ def __init__(self, partition, tgt, src=None, check_first_block=False, version=None):
self.tgt = tgt
self.src = src
self.partition = partition
self.check_first_block = check_first_block
- version = 1
- if OPTIONS.info_dict:
- version = max(
- int(i) for i in
- OPTIONS.info_dict.get("blockimgdiff_versions", "1").split(","))
+ if version is None:
+ version = 1
+ if OPTIONS.info_dict:
+ version = max(
+ int(i) for i in
+ OPTIONS.info_dict.get("blockimgdiff_versions", "1").split(","))
+ self.version = version
b = blockimgdiff.BlockImageDiff(tgt, src, threads=OPTIONS.worker_threads,
- version=version)
+ version=self.version)
tmpdir = tempfile.mkdtemp()
OPTIONS.tempfiles.append(tmpdir)
self.path = os.path.join(tmpdir, partition)
(self.device, self.src.care_map.to_string_raw(),
self.src.TotalSha1()))
script.Print("Verified %s image..." % (self.partition,))
- script.AppendExtra(('else\n'
- ' (range_sha1("%s", "%s") == "%s") ||\n'
- ' abort("%s partition has unexpected contents");\n'
- 'endif;') %
- (self.device, self.tgt.care_map.to_string_raw(),
- self.tgt.TotalSha1(), self.partition))
+ # Abort the OTA update if it doesn't support resumable OTA (i.e. version<3)
+ # and the checksum doesn't match the one in the source partition.
+ if self.version < 3:
+ script.AppendExtra(('else\n'
+ ' abort("%s partition has unexpected contents");\n'
+ 'endif;') % (self.partition))
+ else:
+ script.AppendExtra(('else\n'
+ ' (range_sha1("%s", "%s") == "%s") ||\n'
+ ' abort("%s partition has unexpected contents");\n'
+ 'endif;') %
+ (self.device, self.tgt.care_map.to_string_raw(),
+ self.tgt.TotalSha1(), self.partition))
def _WriteUpdate(self, script, output_zip):
partition = self.partition
system_src = GetImage("system", OPTIONS.source_tmp, OPTIONS.source_info_dict)
system_tgt = GetImage("system", OPTIONS.target_tmp, OPTIONS.target_info_dict)
+
+ blockimgdiff_version = 1
+ if OPTIONS.info_dict:
+ blockimgdiff_version = max(
+ int(i) for i in
+ OPTIONS.info_dict.get("blockimgdiff_versions", "1").split(","))
+
system_diff = common.BlockDifference("system", system_tgt, system_src,
- check_first_block=True)
+ check_first_block=True,
+ version=blockimgdiff_version)
if HasVendorPartition(target_zip):
if not HasVendorPartition(source_zip):
vendor_src = GetImage("vendor", OPTIONS.source_tmp, OPTIONS.source_info_dict)
vendor_tgt = GetImage("vendor", OPTIONS.target_tmp, OPTIONS.target_info_dict)
vendor_diff = common.BlockDifference("vendor", vendor_tgt, vendor_src,
- check_first_block=True)
+ check_first_block=True,
+ version=blockimgdiff_version)
else:
vendor_diff = None
device_specific.IncrementalOTA_VerifyBegin()
if oem_props is None:
- script.AssertSomeFingerprint(source_fp, target_fp)
+ # When blockimgdiff version is less than 3 (non-resumable block-based OTA),
+ # patching on a device that's already on the target build will damage the
+ # system. Because operations like move don't check the block state, they
+ # always apply the changes unconditionally.
+ if blockimgdiff_version <= 2:
+ script.AssertSomeFingerprint(source_fp)
+ else:
+ script.AssertSomeFingerprint(source_fp, target_fp)
else:
- script.AssertSomeThumbprint(
- GetBuildProp("ro.build.thumbprint", OPTIONS.target_info_dict),
- GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
+ if blockimgdiff_version <= 2:
+ script.AssertSomeThumbprint(
+ GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
+ else:
+ script.AssertSomeThumbprint(
+ GetBuildProp("ro.build.thumbprint", OPTIONS.target_info_dict),
+ GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
if updating_boot:
boot_type, boot_device = common.GetTypeAndDevice("/boot", OPTIONS.info_dict)