Merge "Check block0 for remounting partition R/W"
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index aaf51e9..95aeb62 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -1241,9 +1241,6 @@
self.partition = partition
self.check_first_block = check_first_block
- # Due to http://b/20939131, check_first_block is disabled temporarily.
- assert not self.check_first_block
-
if version is None:
version = 1
if OPTIONS.info_dict:
@@ -1307,14 +1304,8 @@
script.AppendExtra(('if (range_sha1("%s", "%s") == "%s" || '
'block_image_verify("%s", '
'package_extract_file("%s.transfer.list"), '
- '"%s.new.dat", "%s.patch.dat") || '
- '(block_image_recover("%s", "%s") && '
- 'block_image_verify("%s", '
- 'package_extract_file("%s.transfer.list"), '
- '"%s.new.dat", "%s.patch.dat"))) then') % (
+ '"%s.new.dat", "%s.patch.dat")) then') % (
self.device, ranges_str, self.src.TotalSha1(),
- self.device, partition, partition, partition,
- self.device, ranges_str,
self.device, partition, partition, partition))
elif self.version == 3:
script.AppendExtra(('if (range_sha1("%s", "%s") == "%s" || '
@@ -1329,22 +1320,36 @@
script.Print('Verified %s image...' % (partition,))
script.AppendExtra('else')
- # When generating incrementals for the system and vendor partitions,
- # explicitly check the first block (which contains the superblock) of
- # the partition to see if it's what we expect. If this check fails,
- # give an explicit log message about the partition having been
- # remounted R/W (the most likely explanation) and the need to flash to
- # get OTAs working again.
- if self.check_first_block:
- self._CheckFirstBlock(script)
+ if self.version >= 4:
+
+ # Bug: 21124327
+ # When generating incrementals for the system and vendor partitions in
+ # version 4 or newer, explicitly check the first block (which contains
+ # the superblock) of the partition to see if it's what we expect. If
+ # this check fails, give an explicit log message about the partition
+ # having been remounted R/W (the most likely explanation).
+ if self.check_first_block:
+ script.AppendExtra('check_first_block("%s");' % (self.device,))
+
+ # If version >= 4, try block recovery before abort update
+ script.AppendExtra((
+ 'ifelse (block_image_recover("{device}", "{ranges}") && '
+ 'block_image_verify("{device}", '
+ 'package_extract_file("{partition}.transfer.list"), '
+ '"{partition}.new.dat", "{partition}.patch.dat"), '
+ 'ui_print("{partition} recovered successfully."), '
+ 'abort("{partition} partition fails to recover"));\n'
+ 'endif;').format(device=self.device, ranges=ranges_str,
+ partition=partition))
# Abort the OTA update. Note that the incremental OTA cannot be applied
# even if it may match the checksum of the target partition.
# a) If version < 3, operations like move and erase will make changes
# unconditionally and damage the partition.
# b) If version >= 3, it won't even reach here.
- script.AppendExtra(('abort("%s partition has unexpected contents");\n'
- 'endif;') % (partition,))
+ else:
+ script.AppendExtra(('abort("%s partition has unexpected contents");\n'
+ 'endif;') % (partition,))
def _WritePostInstallVerifyScript(self, script):
partition = self.partition
@@ -1413,22 +1418,9 @@
return ctx.hexdigest()
- # TODO(tbao): Due to http://b/20939131, block 0 may be changed without
- # remounting R/W. Will change the checking to a finer-grained way to
- # mask off those bits.
- def _CheckFirstBlock(self, script):
- r = rangelib.RangeSet((0, 1))
- srchash = self._HashBlocks(self.src, r)
-
- script.AppendExtra(('(range_sha1("%s", "%s") == "%s") || '
- 'abort("%s has been remounted R/W; '
- 'reflash device to reenable OTA updates");')
- % (self.device, r.to_string_raw(), srchash,
- self.device))
DataImage = blockimgdiff.DataImage
-
# map recovery.fstab's fs_types to mount/format "partition types"
PARTITION_TYPES = {
"yaffs2": "MTD",
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index a76eaa9..d0636b6 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -811,7 +811,12 @@
int(i) for i in
OPTIONS.info_dict.get("blockimgdiff_versions", "1").split(","))
+ # Check first block of system partition for remount R/W only if
+ # disk type is ext4
+ system_partition = OPTIONS.source_info_dict["fstab"]["/system"]
+ check_first_block = system_partition.fs_type=="ext4"
system_diff = common.BlockDifference("system", system_tgt, system_src,
+ check_first_block,
version=blockimgdiff_version)
if HasVendorPartition(target_zip):
@@ -821,7 +826,13 @@
OPTIONS.source_info_dict)
vendor_tgt = GetImage("vendor", OPTIONS.target_tmp,
OPTIONS.target_info_dict)
+
+ # Check first block of vendor partition for remount R/W only if
+ # disk type is ext4
+ vendor_partition = OPTIONS.source_info_dict["fstab"]["/vendor"]
+ check_first_block = vendor_partition.fs_type=="ext4"
vendor_diff = common.BlockDifference("vendor", vendor_tgt, vendor_src,
+ check_first_block,
version=blockimgdiff_version)
else:
vendor_diff = None