diff options
| -rw-r--r-- | update_verifier/update_verifier.cpp | 82 |
1 files changed, 51 insertions, 31 deletions
diff --git a/update_verifier/update_verifier.cpp b/update_verifier/update_verifier.cpp index b49011a12..ceb3ec948 100644 --- a/update_verifier/update_verifier.cpp +++ b/update_verifier/update_verifier.cpp @@ -45,6 +45,7 @@ #include <unistd.h> #include <algorithm> +#include <future> #include <string> #include <vector> @@ -123,11 +124,6 @@ static bool read_blocks(const std::string& partition, const std::string& range_s LOG(ERROR) << "Failed to find dm block device for " << partition; return false; } - android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(dm_block_device.c_str(), O_RDONLY))); - if (fd.get() == -1) { - PLOG(ERROR) << "Error reading " << dm_block_device << " for partition " << partition; - return false; - } // For block range string, first integer 'count' equals 2 * total number of valid ranges, // followed by 'count' number comma separated integers. Every two integers reprensent a @@ -142,37 +138,61 @@ static bool read_blocks(const std::string& partition, const std::string& range_s return false; } - size_t blk_count = 0; - for (size_t i = 1; i < ranges.size(); i += 2) { - unsigned int range_start, range_end; - bool parse_status = android::base::ParseUint(ranges[i], &range_start); - parse_status = parse_status && android::base::ParseUint(ranges[i + 1], &range_end); - if (!parse_status || range_start >= range_end) { - LOG(ERROR) << "Invalid range pair " << ranges[i] << ", " << ranges[i + 1]; - return false; - } - - static constexpr size_t BLOCKSIZE = 4096; - if (lseek64(fd.get(), static_cast<off64_t>(range_start) * BLOCKSIZE, SEEK_SET) == -1) { - PLOG(ERROR) << "lseek to " << range_start << " failed"; - return false; - } + std::vector<std::future<bool>> threads; + size_t thread_num = std::thread::hardware_concurrency() ?: 4; + thread_num = std::min(thread_num, range_count / 2); + size_t group_range_count = range_count / thread_num; - size_t remain = (range_end - range_start) * BLOCKSIZE; - while (remain > 0) { - size_t to_read = std::min(remain, 1024 * BLOCKSIZE); - std::vector<uint8_t> buf(to_read); - if (!android::base::ReadFully(fd.get(), buf.data(), to_read)) { - PLOG(ERROR) << "Failed to read blocks " << range_start << " to " << range_end; + for (size_t t = 0; t < thread_num; t++) { + auto thread_func = [t, group_range_count, &dm_block_device, &ranges, &partition]() { + size_t blk_count = 0; + static constexpr size_t kBlockSize = 4096; + std::vector<uint8_t> buf(1024 * kBlockSize); + android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(dm_block_device.c_str(), O_RDONLY))); + if (fd.get() == -1) { + PLOG(ERROR) << "Error reading " << dm_block_device << " for partition " << partition; return false; } - remain -= to_read; - } - blk_count += (range_end - range_start); + + for (size_t i = 1 + group_range_count * t; i < group_range_count * (t + 1) + 1; i += 2) { + unsigned int range_start, range_end; + bool parse_status = android::base::ParseUint(ranges[i], &range_start); + parse_status = parse_status && android::base::ParseUint(ranges[i + 1], &range_end); + if (!parse_status || range_start >= range_end) { + LOG(ERROR) << "Invalid range pair " << ranges[i] << ", " << ranges[i + 1]; + return false; + } + + if (lseek64(fd.get(), static_cast<off64_t>(range_start) * kBlockSize, SEEK_SET) == -1) { + PLOG(ERROR) << "lseek to " << range_start << " failed"; + return false; + } + + size_t remain = (range_end - range_start) * kBlockSize; + while (remain > 0) { + size_t to_read = std::min(remain, 1024 * kBlockSize); + if (!android::base::ReadFully(fd.get(), buf.data(), to_read)) { + PLOG(ERROR) << "Failed to read blocks " << range_start << " to " << range_end; + return false; + } + remain -= to_read; + } + blk_count += (range_end - range_start); + } + LOG(INFO) << "Finished reading " << blk_count << " blocks on " << dm_block_device; + return true; + }; + + threads.emplace_back(std::async(std::launch::async, thread_func)); } - LOG(INFO) << "Finished reading " << blk_count << " blocks on " << dm_block_device; - return true; + bool ret = true; + for (auto& t : threads) { + ret = t.get() && ret; + } + LOG(INFO) << "Finished reading blocks on " << dm_block_device << " with " << thread_num + << " threads."; + return ret; } // Returns true to indicate a passing verification (or the error should be ignored); Otherwise |