mirror of
https://git.wownero.com/wownero/wownero.git
synced 2024-08-15 01:03:23 +00:00
BlockchainLMDB: Add support for batch transactions
This commit is contained in:
warptangent
parent
8909d7d82e
commit
58ecc58be1
2 changed files with 289 additions and 55 deletions
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@ -600,15 +600,23 @@ void BlockchainLMDB::check_open() const
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BlockchainLMDB::~BlockchainLMDB()
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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// batch transaction shouldn't be active at this point. If it is, consider it aborted.
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if (m_batch_active)
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batch_abort();
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}
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BlockchainLMDB::BlockchainLMDB()
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BlockchainLMDB::BlockchainLMDB(bool batch_transactions)
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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// initialize folder to something "safe" just in case
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// someone accidentally misuses this class...
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m_folder = "thishsouldnotexistbecauseitisgibberish";
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m_open = false;
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m_batch_transactions = batch_transactions;
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m_write_txn = nullptr;
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m_batch_active = false;
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m_height = 0;
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}
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@ -720,6 +728,13 @@ void BlockchainLMDB::create(const std::string& filename)
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void BlockchainLMDB::close()
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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if (m_batch_active)
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{
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LOG_PRINT_L3("close() first calling batch_abort() due to active batch transaction");
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batch_abort();
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}
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this->sync();
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// FIXME: not yet thread safe!!! Use with care.
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mdb_env_close(m_env);
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}
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@ -727,7 +742,13 @@ void BlockchainLMDB::close()
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void BlockchainLMDB::sync()
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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// LMDB documentation leads me to believe this is unnecessary
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// Does nothing unless LMDB environment was opened with MDB_NOSYNC or in part
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// MDB_NOMETASYNC. Force flush to be synchronous.
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if (auto result = mdb_env_sync(m_env, true))
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{
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throw0(DB_ERROR(std::string("Failed to sync database").append(mdb_strerror(result)).c_str()));
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}
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}
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void BlockchainLMDB::reset()
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@ -867,12 +888,17 @@ uint64_t BlockchainLMDB::get_block_timestamp(const uint64_t& height) const
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<uint64_t> key(height);
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MDB_val result;
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auto get_result = mdb_get(txn, m_block_timestamps, &key, &result);
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auto get_result = mdb_get(*txn_ptr, m_block_timestamps, &key, &result);
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if (get_result == MDB_NOTFOUND)
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{
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throw0(DB_ERROR(std::string("Attempt to get timestamp from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- timestamp not in db").c_str()));
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@ -880,6 +906,7 @@ uint64_t BlockchainLMDB::get_block_timestamp(const uint64_t& height) const
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else if (get_result)
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throw0(DB_ERROR("Error attempting to retrieve a timestamp from the db"));
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if (! m_batch_active)
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txn.commit();
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return *(const uint64_t*)result.mv_data;
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}
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@ -904,12 +931,18 @@ size_t BlockchainLMDB::get_block_size(const uint64_t& height) const
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<uint64_t> key(height);
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MDB_val result;
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auto get_result = mdb_get(txn, m_block_sizes, &key, &result);
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auto get_result = mdb_get(*txn_ptr, m_block_sizes, &key, &result);
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if (get_result == MDB_NOTFOUND)
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{
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throw0(DB_ERROR(std::string("Attempt to get block size from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- block size not in db").c_str()));
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@ -917,6 +950,7 @@ size_t BlockchainLMDB::get_block_size(const uint64_t& height) const
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else if (get_result)
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throw0(DB_ERROR("Error attempting to retrieve a block size from the db"));
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if (! m_batch_active)
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txn.commit();
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return *(const size_t*)result.mv_data;
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}
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@ -927,12 +961,17 @@ difficulty_type BlockchainLMDB::get_block_cumulative_difficulty(const uint64_t&
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<uint64_t> key(height);
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MDB_val result;
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auto get_result = mdb_get(txn, m_block_diffs, &key, &result);
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auto get_result = mdb_get(*txn_ptr, m_block_diffs, &key, &result);
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if (get_result == MDB_NOTFOUND)
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{
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throw0(DB_ERROR(std::string("Attempt to get cumulative difficulty from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- difficulty not in db").c_str()));
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@ -940,6 +979,7 @@ difficulty_type BlockchainLMDB::get_block_cumulative_difficulty(const uint64_t&
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else if (get_result)
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throw0(DB_ERROR("Error attempting to retrieve a cumulative difficulty from the db"));
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if (! m_batch_active)
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txn.commit();
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return *(difficulty_type*)result.mv_data;
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}
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@ -967,12 +1007,18 @@ uint64_t BlockchainLMDB::get_block_already_generated_coins(const uint64_t& heigh
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<uint64_t> key(height);
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MDB_val result;
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auto get_result = mdb_get(txn, m_block_coins, &key, &result);
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auto get_result = mdb_get(*txn_ptr, m_block_coins, &key, &result);
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if (get_result == MDB_NOTFOUND)
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{
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throw0(DB_ERROR(std::string("Attempt to get generated coins from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- block size not in db").c_str()));
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@ -980,6 +1026,7 @@ uint64_t BlockchainLMDB::get_block_already_generated_coins(const uint64_t& heigh
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else if (get_result)
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throw0(DB_ERROR("Error attempting to retrieve a total generated coins from the db"));
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if (! m_batch_active)
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txn.commit();
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return *(const uint64_t*)result.mv_data;
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}
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@ -990,19 +1037,27 @@ crypto::hash BlockchainLMDB::get_block_hash_from_height(const uint64_t& height)
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<uint64_t> key(height);
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MDB_val result;
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auto get_result = mdb_get(txn, m_block_hashes, &key, &result);
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auto get_result = mdb_get(*txn_ptr, m_block_hashes, &key, &result);
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if (get_result == MDB_NOTFOUND)
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{
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throw0(BLOCK_DNE(std::string("Attempt to get hash from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- hash not in db").c_str()));
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}
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else if (get_result)
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throw0(DB_ERROR("Error attempting to retrieve a block hash from the db"));
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throw0(DB_ERROR(std::string("Error attempting to retrieve a block hash from the db: ").
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append(mdb_strerror(get_result)).c_str()));
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if (! m_batch_active)
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txn.commit();
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return *(crypto::hash*)result.mv_data;
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}
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@ -1075,6 +1130,10 @@ bool BlockchainLMDB::tx_exists(const crypto::hash& h) const
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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check_open();
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if (m_batch_active)
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{
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LOG_PRINT_L0("WARNING: active batch transaction while creating a read-only txn in tx_exists()");
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}
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txn_safe txn;
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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@ -1120,12 +1179,18 @@ transaction BlockchainLMDB::get_tx(const crypto::hash& h) const
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<crypto::hash> key(h);
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MDB_val result;
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auto get_result = mdb_get(txn, m_txs, &key, &result);
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auto get_result = mdb_get(*txn_ptr, m_txs, &key, &result);
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if (get_result == MDB_NOTFOUND)
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throw1(TX_DNE(std::string("tx with hash ").append(epee::string_tools::pod_to_hex(h)).append(" not found in db").c_str()));
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else if (get_result)
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@ -1137,6 +1202,8 @@ transaction BlockchainLMDB::get_tx(const crypto::hash& h) const
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transaction tx;
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if (!parse_and_validate_tx_from_blob(bd, tx))
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throw0(DB_ERROR("Failed to parse tx from blob retrieved from the db"));
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if (! m_batch_active)
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txn.commit();
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return tx;
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}
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@ -1178,13 +1245,27 @@ uint64_t BlockchainLMDB::get_tx_block_height(const crypto::hash& h) const
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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check_open();
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// If m_batch_active is set, a batch transaction exists beyond this class,
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// such as a batch import with verification enabled, or possibly (later) a
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// batch network sync.
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//
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// A regular network sync without batching would be expected to open a new
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// read transaction here, as validation is done prior to the write for block
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// and tx data.
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<crypto::hash> key(h);
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MDB_val result;
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auto get_result = mdb_get(txn, m_tx_heights, &key, &result);
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auto get_result = mdb_get(*txn_ptr, m_tx_heights, &key, &result);
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if (get_result == MDB_NOTFOUND)
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{
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throw1(TX_DNE(std::string("tx height with hash ").append(epee::string_tools::pod_to_hex(h)).append(" not found in db").c_str()));
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@ -1192,6 +1273,9 @@ uint64_t BlockchainLMDB::get_tx_block_height(const crypto::hash& h) const
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else if (get_result)
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throw0(DB_ERROR("DB error attempting to fetch tx height from hash"));
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if (! m_batch_active)
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txn.commit();
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return *(const uint64_t*)result.mv_data;
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}
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@ -1334,13 +1418,18 @@ tx_out_index BlockchainLMDB::get_output_tx_and_index_from_global(const uint64_t&
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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}
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MDB_val_copy<uint64_t> k(index);
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MDB_val v;
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auto get_result = mdb_get(txn, m_output_txs, &k, &v);
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auto get_result = mdb_get(*txn_ptr, m_output_txs, &k, &v);
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if (get_result == MDB_NOTFOUND)
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throw1(OUTPUT_DNE("output with given index not in db"));
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else if (get_result)
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@ -1348,11 +1437,13 @@ tx_out_index BlockchainLMDB::get_output_tx_and_index_from_global(const uint64_t&
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crypto::hash tx_hash = *(crypto::hash*)v.mv_data;
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get_result = mdb_get(txn, m_output_indices, &k, &v);
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get_result = mdb_get(*txn_ptr, m_output_indices, &k, &v);
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if (get_result == MDB_NOTFOUND)
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throw1(OUTPUT_DNE("output with given index not in db"));
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else if (get_result)
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throw0(DB_ERROR("DB error attempting to fetch output tx index"));
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if (! m_batch_active)
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txn.commit();
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return tx_out_index(tx_hash, *(const uint64_t *)v.mv_data);
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}
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@ -1363,10 +1454,15 @@ tx_out_index BlockchainLMDB::get_output_tx_and_index(const uint64_t& amount, con
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check_open();
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txn_safe txn;
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txn_safe* txn_ptr = &txn;
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if (m_batch_active)
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txn_ptr = m_write_txn;
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else
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{
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if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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lmdb_cur cur(txn, m_output_amounts);
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}
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lmdb_cur cur(*txn_ptr, m_output_amounts);
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MDB_val_copy<uint64_t> k(amount);
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MDB_val v;
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@ -1395,6 +1491,7 @@ tx_out_index BlockchainLMDB::get_output_tx_and_index(const uint64_t& amount, con
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cur.close();
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if (! m_batch_active)
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txn.commit();
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return get_output_tx_and_index_from_global(glob_index);
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@ -1538,6 +1635,85 @@ bool BlockchainLMDB::has_key_image(const crypto::key_image& img) const
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return false;
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}
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void BlockchainLMDB::batch_start()
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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if (! m_batch_transactions)
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throw0(DB_ERROR("batch transactions not enabled"));
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if (m_batch_active)
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throw0(DB_ERROR("batch transaction already in progress"));
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if (m_write_txn)
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throw0(DB_ERROR("batch transaction attempted, but m_write_txn already in use"));
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check_open();
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// NOTE: need to make sure it's destroyed properly when done
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if (mdb_txn_begin(m_env, NULL, 0, m_write_batch_txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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// indicates this transaction is for batch transactions, but not whether it's
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// active
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m_write_batch_txn.m_batch_txn = true;
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m_write_txn = &m_write_batch_txn;
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m_batch_active = true;
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LOG_PRINT_L3("batch transaction: begin");
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}
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void BlockchainLMDB::batch_commit()
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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if (! m_batch_transactions)
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throw0(DB_ERROR("batch transactions not enabled"));
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if (! m_batch_active)
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throw0(DB_ERROR("batch transaction not in progress"));
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check_open();
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LOG_PRINT_L3("batch transaction: committing...");
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m_write_txn->commit();
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LOG_PRINT_L3("batch transaction: committed");
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if (mdb_txn_begin(m_env, NULL, 0, m_write_batch_txn))
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throw0(DB_ERROR("Failed to create a transaction for the db"));
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if (! m_write_batch_txn.m_batch_txn)
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throw0(DB_ERROR("m_write_batch_txn not marked as a batch transaction"));
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m_write_txn = &m_write_batch_txn;
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}
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void BlockchainLMDB::batch_stop()
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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if (! m_batch_transactions)
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throw0(DB_ERROR("batch transactions not enabled"));
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if (! m_batch_active)
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throw0(DB_ERROR("batch transaction not in progress"));
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check_open();
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LOG_PRINT_L3("batch transaction: committing...");
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m_write_txn->commit();
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// for destruction of batch transaction
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m_write_txn = nullptr;
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m_batch_active = false;
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LOG_PRINT_L3("batch transaction: end");
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||||
}
|
||||
|
||||
void BlockchainLMDB::batch_abort()
|
||||
{
|
||||
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
|
||||
if (! m_batch_transactions)
|
||||
throw0(DB_ERROR("batch transactions not enabled"));
|
||||
if (! m_batch_active)
|
||||
throw0(DB_ERROR("batch transaction not in progress"));
|
||||
check_open();
|
||||
// for destruction of batch transaction
|
||||
m_write_txn = nullptr;
|
||||
// explicitly call in case mdb_env_close() (BlockchainLMDB::close()) called before BlockchainLMDB destructor called.
|
||||
m_write_batch_txn.abort();
|
||||
m_batch_active = false;
|
||||
LOG_PRINT_L3("batch transaction: aborted");
|
||||
}
|
||||
|
||||
void BlockchainLMDB::set_batch_transactions(bool batch_transactions)
|
||||
{
|
||||
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
|
||||
m_batch_transactions = batch_transactions;
|
||||
LOG_PRINT_L3("batch transactions " << (m_batch_transactions ? "enabled" : "disabled"));
|
||||
}
|
||||
|
||||
uint64_t BlockchainLMDB::add_block( const block& blk
|
||||
, const size_t& block_size
|
||||
, const difficulty_type& cumulative_difficulty
|
||||
|
|
@ -1547,22 +1723,30 @@ uint64_t BlockchainLMDB::add_block( const block& blk
|
|||
{
|
||||
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
|
||||
check_open();
|
||||
|
||||
txn_safe txn;
|
||||
if (! m_batch_active)
|
||||
{
|
||||
if (mdb_txn_begin(m_env, NULL, 0, txn))
|
||||
throw0(DB_ERROR("Failed to create a transaction for the db"));
|
||||
m_write_txn = &txn;
|
||||
}
|
||||
|
||||
uint64_t num_outputs = m_num_outputs;
|
||||
try
|
||||
{
|
||||
BlockchainDB::add_block(blk, block_size, cumulative_difficulty, coins_generated, txs);
|
||||
if (! m_batch_active)
|
||||
{
|
||||
m_write_txn = NULL;
|
||||
|
||||
txn.commit();
|
||||
}
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
m_num_outputs = num_outputs;
|
||||
if (! m_batch_active)
|
||||
m_write_txn = NULL;
|
||||
throw;
|
||||
}
|
||||
|
|
@ -1574,18 +1758,24 @@ void BlockchainLMDB::pop_block(block& blk, std::vector<transaction>& txs)
|
|||
{
|
||||
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
|
||||
txn_safe txn;
|
||||
if (! m_batch_active)
|
||||
{
|
||||
if (mdb_txn_begin(m_env, NULL, 0, txn))
|
||||
throw0(DB_ERROR("Failed to create a transaction for the db"));
|
||||
m_write_txn = &txn;
|
||||
}
|
||||
|
||||
uint64_t num_outputs = m_num_outputs;
|
||||
try
|
||||
{
|
||||
BlockchainDB::pop_block(blk, txs);
|
||||
if (! m_batch_active)
|
||||
{
|
||||
m_write_txn = NULL;
|
||||
|
||||
txn.commit();
|
||||
}
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
m_num_outputs = num_outputs;
|
||||
|
|
|
|||
|
|
@ -38,8 +38,23 @@ struct txn_safe
|
|||
txn_safe() : m_txn(NULL) { }
|
||||
~txn_safe()
|
||||
{
|
||||
if(m_txn != NULL)
|
||||
LOG_PRINT_L3("txn_safe: destructor");
|
||||
if (m_txn != NULL)
|
||||
{
|
||||
if (m_batch_txn) // this is a batch txn and should have been handled before this point for safety
|
||||
{
|
||||
LOG_PRINT_L0("WARNING: txn_safe: m_txn is a batch txn and it's not NULL in destructor - calling mdb_txn_abort()");
|
||||
}
|
||||
else
|
||||
{
|
||||
// Example of when this occurs: a lookup fails, so a read-only txn is
|
||||
// aborted through this destructor. However, successful read-only txns
|
||||
// ideally should have been committed when done and not end up here.
|
||||
//
|
||||
// NOTE: not sure if this is ever reached for a non-batch write
|
||||
// transaction, but it's probably not ideal if it did.
|
||||
LOG_PRINT_L3("txn_safe: m_txn not NULL in destructor - calling mdb_txn_abort()");
|
||||
}
|
||||
mdb_txn_abort(m_txn);
|
||||
}
|
||||
}
|
||||
|
|
@ -60,6 +75,24 @@ struct txn_safe
|
|||
m_txn = NULL;
|
||||
}
|
||||
|
||||
// This should only be needed for batch transaction which must be ensured to
|
||||
// be aborted before mdb_env_close, not after. So we can't rely on
|
||||
// BlockchainLMDB destructor to call txn_safe destructor, as that's too late
|
||||
// to properly abort, since mdb_env_close would have been called earlier.
|
||||
void abort()
|
||||
{
|
||||
LOG_PRINT_L3("txn_safe: abort()");
|
||||
if(m_txn != NULL)
|
||||
{
|
||||
mdb_txn_abort(m_txn);
|
||||
m_txn = NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
LOG_PRINT_L0("WARNING: txn_safe: abort() called, but m_txn is NULL");
|
||||
}
|
||||
}
|
||||
|
||||
operator MDB_txn*()
|
||||
{
|
||||
return m_txn;
|
||||
|
|
@ -71,13 +104,14 @@ struct txn_safe
|
|||
}
|
||||
|
||||
MDB_txn* m_txn;
|
||||
bool m_batch_txn = false;
|
||||
};
|
||||
|
||||
|
||||
class BlockchainLMDB : public BlockchainDB
|
||||
{
|
||||
public:
|
||||
BlockchainLMDB();
|
||||
BlockchainLMDB(bool batch_transactions=false);
|
||||
~BlockchainLMDB();
|
||||
|
||||
virtual void open(const std::string& filename);
|
||||
|
|
@ -177,6 +211,12 @@ public:
|
|||
, const std::vector<transaction>& txs
|
||||
);
|
||||
|
||||
virtual void set_batch_transactions(bool batch_transactions);
|
||||
virtual void batch_start();
|
||||
virtual void batch_commit();
|
||||
virtual void batch_stop();
|
||||
virtual void batch_abort();
|
||||
|
||||
virtual void pop_block(block& blk, std::vector<transaction>& txs);
|
||||
|
||||
private:
|
||||
|
|
@ -264,7 +304,11 @@ private:
|
|||
uint64_t m_height;
|
||||
uint64_t m_num_outputs;
|
||||
std::string m_folder;
|
||||
txn_safe* m_write_txn;
|
||||
txn_safe* m_write_txn; // may point to either a short-lived txn or a batch txn
|
||||
txn_safe m_write_batch_txn; // persist batch txn outside of BlockchainLMDB
|
||||
|
||||
bool m_batch_transactions; // support for batch transactions
|
||||
bool m_batch_active; // whether batch transaction is in progress
|
||||
};
|
||||
|
||||
} // namespace cryptonote
|
||||
|
|
|
|||
Loading…
Reference in a new issue