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-rw-r--r--updater/blockimg.cpp154
1 files changed, 126 insertions, 28 deletions
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index df366b0b8..a0b9ad233 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -44,6 +44,7 @@
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
#include <applypatch/applypatch.h>
+#include <brotli/decode.h>
#include <openssl/sha.h>
#include <private/android_filesystem_config.h>
#include <ziparchive/zip_archive.h>
@@ -149,7 +150,11 @@ static void allocate(size_t size, std::vector<uint8_t>& buffer) {
class RangeSinkWriter {
public:
RangeSinkWriter(int fd, const RangeSet& tgt)
- : fd_(fd), tgt_(tgt), next_range_(0), current_range_left_(0), bytes_written_(0) {
+ : fd_(fd),
+ tgt_(tgt),
+ next_range_(0),
+ current_range_left_(0),
+ bytes_written_(0) {
CHECK_NE(tgt.size(), static_cast<size_t>(0));
};
@@ -157,6 +162,11 @@ class RangeSinkWriter {
return next_range_ == tgt_.size() && current_range_left_ == 0;
}
+ size_t AvailableSpace() const {
+ return tgt_.blocks() * BLOCKSIZE - bytes_written_;
+ }
+
+ // Return number of bytes written; and 0 indicates a writing failure.
size_t Write(const uint8_t* data, size_t size) {
if (Finished()) {
LOG(ERROR) << "range sink write overrun; can't write " << size << " bytes";
@@ -166,23 +176,8 @@ class RangeSinkWriter {
size_t written = 0;
while (size > 0) {
// Move to the next range as needed.
- if (current_range_left_ == 0) {
- if (next_range_ < tgt_.size()) {
- const Range& range = tgt_[next_range_];
- off64_t offset = static_cast<off64_t>(range.first) * BLOCKSIZE;
- current_range_left_ = (range.second - range.first) * BLOCKSIZE;
- next_range_++;
- if (!discard_blocks(fd_, offset, current_range_left_)) {
- break;
- }
-
- if (!check_lseek(fd_, offset, SEEK_SET)) {
- break;
- }
- } else {
- // We can't write any more; return how many bytes have been written so far.
- break;
- }
+ if (!SeekToOutputRange()) {
+ break;
}
size_t write_now = size;
@@ -210,9 +205,35 @@ class RangeSinkWriter {
}
private:
- // The input data.
+ // Set up the output cursor, move to next range if needed.
+ bool SeekToOutputRange() {
+ // We haven't finished the current range yet.
+ if (current_range_left_ != 0) {
+ return true;
+ }
+ // We can't write any more; let the write function return how many bytes have been written
+ // so far.
+ if (next_range_ >= tgt_.size()) {
+ return false;
+ }
+
+ const Range& range = tgt_[next_range_];
+ off64_t offset = static_cast<off64_t>(range.first) * BLOCKSIZE;
+ current_range_left_ = (range.second - range.first) * BLOCKSIZE;
+ next_range_++;
+
+ if (!discard_blocks(fd_, offset, current_range_left_)) {
+ return false;
+ }
+ if (!check_lseek(fd_, offset, SEEK_SET)) {
+ return false;
+ }
+ return true;
+ }
+
+ // The output file descriptor.
int fd_;
- // The destination for the data.
+ // The destination ranges for the data.
const RangeSet& tgt_;
// The next range that we should write to.
size_t next_range_;
@@ -243,8 +264,10 @@ class RangeSinkWriter {
struct NewThreadInfo {
ZipArchiveHandle za;
ZipEntry entry;
+ bool brotli_compressed;
- RangeSinkWriter* writer;
+ std::unique_ptr<RangeSinkWriter> writer;
+ BrotliDecoderState* brotli_decoder_state;
bool receiver_available;
pthread_mutex_t mu;
@@ -264,9 +287,14 @@ static bool receive_new_data(const uint8_t* data, size_t size, void* cookie) {
// At this point nti->writer is set, and we own it. The main thread is waiting for it to
// disappear from nti.
- size_t written = nti->writer->Write(data, size);
- data += written;
- size -= written;
+ size_t write_now = std::min(size, nti->writer->AvailableSpace());
+ if (nti->writer->Write(data, write_now) != write_now) {
+ LOG(ERROR) << "Failed to write " << write_now << " bytes.";
+ return false;
+ }
+
+ data += write_now;
+ size -= write_now;
if (nti->writer->Finished()) {
// We have written all the bytes desired by this writer.
@@ -281,10 +309,72 @@ static bool receive_new_data(const uint8_t* data, size_t size, void* cookie) {
return true;
}
-static void* unzip_new_data(void* cookie) {
+static bool receive_brotli_new_data(const uint8_t* data, size_t size, void* cookie) {
NewThreadInfo* nti = static_cast<NewThreadInfo*>(cookie);
- ProcessZipEntryContents(nti->za, &nti->entry, receive_new_data, nti);
+ while (size > 0 || BrotliDecoderHasMoreOutput(nti->brotli_decoder_state)) {
+ // Wait for nti->writer to be non-null, indicating some of this data is wanted.
+ pthread_mutex_lock(&nti->mu);
+ while (nti->writer == nullptr) {
+ pthread_cond_wait(&nti->cv, &nti->mu);
+ }
+ pthread_mutex_unlock(&nti->mu);
+
+ // At this point nti->writer is set, and we own it. The main thread is waiting for it to
+ // disappear from nti.
+
+ size_t buffer_size = std::min<size_t>(32768, nti->writer->AvailableSpace());
+ if (buffer_size == 0) {
+ LOG(ERROR) << "No space left in output range";
+ return false;
+ }
+ uint8_t buffer[buffer_size];
+ size_t available_in = size;
+ size_t available_out = buffer_size;
+ uint8_t* next_out = buffer;
+
+ // The brotli decoder will update |data|, |available_in|, |next_out| and |available_out|.
+ BrotliDecoderResult result = BrotliDecoderDecompressStream(
+ nti->brotli_decoder_state, &available_in, &data, &available_out, &next_out, nullptr);
+
+ if (result == BROTLI_DECODER_RESULT_ERROR) {
+ LOG(ERROR) << "Decompression failed with "
+ << BrotliDecoderErrorString(BrotliDecoderGetErrorCode(nti->brotli_decoder_state));
+ return false;
+ }
+
+ LOG(DEBUG) << "bytes to write: " << buffer_size - available_out << ", bytes consumed "
+ << size - available_in << ", decoder status " << result;
+
+ size_t write_now = buffer_size - available_out;
+ if (nti->writer->Write(buffer, write_now) != write_now) {
+ LOG(ERROR) << "Failed to write " << write_now << " bytes.";
+ return false;
+ }
+
+ // Update the remaining size. The input data ptr is already updated by brotli decoder function.
+ size = available_in;
+
+ if (nti->writer->Finished()) {
+ // We have written all the bytes desired by this writer.
+
+ pthread_mutex_lock(&nti->mu);
+ nti->writer = nullptr;
+ pthread_cond_broadcast(&nti->cv);
+ pthread_mutex_unlock(&nti->mu);
+ }
+ }
+
+ return true;
+}
+
+static void* unzip_new_data(void* cookie) {
+ NewThreadInfo* nti = static_cast<NewThreadInfo*>(cookie);
+ if (nti->brotli_compressed) {
+ ProcessZipEntryContents(nti->za, &nti->entry, receive_brotli_new_data, nti);
+ } else {
+ ProcessZipEntryContents(nti->za, &nti->entry, receive_new_data, nti);
+ }
pthread_mutex_lock(&nti->mu);
nti->receiver_available = false;
if (nti->writer != nullptr) {
@@ -1142,9 +1232,8 @@ static int PerformCommandNew(CommandParameters& params) {
if (params.canwrite) {
LOG(INFO) << " writing " << tgt.blocks() << " blocks of new data";
- RangeSinkWriter writer(params.fd, tgt);
pthread_mutex_lock(&params.nti.mu);
- params.nti.writer = &writer;
+ params.nti.writer = std::make_unique<RangeSinkWriter>(params.fd, tgt);
pthread_cond_broadcast(&params.nti.cv);
while (params.nti.writer != nullptr) {
@@ -1384,6 +1473,11 @@ static Value* PerformBlockImageUpdate(const char* name, State* state,
if (params.canwrite) {
params.nti.za = za;
params.nti.entry = new_entry;
+ params.nti.brotli_compressed = android::base::EndsWith(new_data_fn->data, ".br");
+ if (params.nti.brotli_compressed) {
+ // Initialize brotli decoder state.
+ params.nti.brotli_decoder_state = BrotliDecoderCreateInstance(nullptr, nullptr, nullptr);
+ }
params.nti.receiver_available = true;
pthread_mutex_init(&params.nti.mu, nullptr);
@@ -1526,6 +1620,10 @@ pbiudone:
}
// params.fd will be automatically closed because it's a unique_fd.
+ if (params.nti.brotli_decoder_state != nullptr) {
+ BrotliDecoderDestroyInstance(params.nti.brotli_decoder_state);
+ }
+
// Only delete the stash if the update cannot be resumed, or it's a verification run and we
// created the stash.
if (params.isunresumable || (!params.canwrite && params.createdstash)) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 06:41:41 +0200