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releasetools: Only verify the blocks to be touched.

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For incremental BBOTAs, we used to verify the integrity of all the
blocks in the source partition. In order to reduce the time cost under
recovery, this CL changes to only verify the blocks that will be touched
in the given OTA package (BBOTA >= 3 only). This is a trade-off between
performance and reliability.

Bug: 27813356
Change-Id: I3975ae6f461f0f7e58d24f1df7df46a449d2988b
This commit is contained in:
Tao Bao
2016-04-12 15:53:16 -07:00
parent 3ebddd40e0
commit d522bdc9ed
3 changed files with 26 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
tools/releasetools/common.py
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@@ -1314,6 +1314,8 @@ class BlockDifference(object):
self.path = os.path.join(tmpdir, partition)
b.Compute(self.path)
self._required_cache = b.max_stashed_size
self.touched_src_ranges = b.touched_src_ranges
self.touched_src_sha1 = b.touched_src_sha1
if src is None:
_, self.device = GetTypeAndDevice("/" + partition, OPTIONS.info_dict)
@@ -1357,26 +1359,31 @@ class BlockDifference(object):
self.device))
script.AppendExtra("")
def WriteVerifyScript(self, script):
def WriteVerifyScript(self, script, touched_blocks_only=False):
partition = self.partition
if not self.src:
script.Print("Image %s will be patched unconditionally." % (partition,))
else:
ranges = self.src.care_map.subtract(self.src.clobbered_blocks)
if touched_blocks_only and self.version >= 3:
ranges = self.touched_src_ranges
expected_sha1 = self.touched_src_sha1
else:
ranges = self.src.care_map.subtract(self.src.clobbered_blocks)
expected_sha1 = self.src.TotalSha1()
ranges_str = ranges.to_string_raw()
if self.version >= 4:
script.AppendExtra(('if (range_sha1("%s", "%s") == "%s" || '
'block_image_verify("%s", '
'package_extract_file("%s.transfer.list"), '
'"%s.new.dat", "%s.patch.dat")) then') % (
self.device, ranges_str, self.src.TotalSha1(),
self.device, ranges_str, expected_sha1,
self.device, partition, partition, partition))
elif self.version == 3:
script.AppendExtra(('if (range_sha1("%s", "%s") == "%s" || '
'block_image_verify("%s", '
'package_extract_file("%s.transfer.list"), '
'"%s.new.dat", "%s.patch.dat")) then') % (
self.device, ranges_str, self.src.TotalSha1(),
self.device, ranges_str, expected_sha1,
self.device, partition, partition, partition))
else:
script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (