Fix non-ab fuse ota fail bug
Fix the 'Calculate the offset to last partial block' logic in
ReadBlockAligndData. If file_size % fuse_block_size_ < source_block_size_,
the origin map logic will get a wrong block address of last block.
This bug leads to the non-ab fuse ota fail.
Test: compare the md5 of origin pkg and pkg reading from fuse.
Change-Id: Ic5132a7e9919cc2e91390231be342b97421ea23e
diff --git a/fuse_sideload/fuse_provider.cpp b/fuse_sideload/fuse_provider.cpp
index 8fa1b5c..2183d08 100644
--- a/fuse_sideload/fuse_provider.cpp
+++ b/fuse_sideload/fuse_provider.cpp
@@ -118,11 +118,16 @@
}
if (uint64_t tailing_bytes = fetch_size % source_block_size_; tailing_bytes != 0) {
- // Calculate the offset to last partial block.
+ // Calculate the offset to last partial block. Two possibilities as below:
+ // 1: fetch_size < source_block_size_, the read_ranges is a blank range_set.
+ // Get the last block num through GetBlockNumber() of the offset block.
+ // 2: fetch_size >= source_block_size_, the last block num is already stored
+ // in read-ranges by GetSubRanges() above.
uint64_t tailing_offset =
read_ranges.value()
? static_cast<uint64_t>((read_ranges->cend() - 1)->second) * source_block_size_
- : static_cast<uint64_t>(start_block) * source_block_size_;
+ : static_cast<uint64_t>(ranges_.GetBlockNumber(offset / source_block_size_)) *
+ source_block_size_;
if (!android::base::ReadFullyAtOffset(fd_, next_out, tailing_bytes, tailing_offset)) {
PLOG(ERROR) << "Failed to read tailing " << tailing_bytes << " bytes at offset "
<< tailing_offset;