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blockchain_db: do not throw on expected partial results getting keys 

When scanning for outputs used in a set of incoming blocks,
we expect that some of the inputs in their transactions will
not be found in the blockchain, as they could be in previous
blocks in that set. Those outputs will be scanned there at
a later point. In this case, we add a flag to control wehther
an output not being found is expected or not.
This commit is contained in:
moneromooo-monero 2017-02-13 19:05:30 +00:00
parent 6e78915061
commit cca95c1c7a
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
4 changed files with 11 additions and 4 deletions
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2
src/blockchain_db/blockchain_db.h
View File

@ -1184,7 +1184,7 @@ public:
* @param offsets a list of amount-specific output indices
* @param outputs return-by-reference a list of outputs' metadata
*/
virtual void get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs) = 0;
virtual void get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs, bool allow_partial = false) = 0;
/*
* FIXME: Need to check with git blame and ask what this does to

9
src/blockchain_db/lmdb/db_lmdb.cpp
View File

@ -2617,7 +2617,7 @@ void BlockchainLMDB::get_output_tx_and_index_from_global(const std::vector<uint6
TXN_POSTFIX_RDONLY();
}
void BlockchainLMDB::get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs)
void BlockchainLMDB::get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs, bool allow_partial)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
TIME_MEASURE_START(db3);
@ -2635,7 +2635,14 @@ void BlockchainLMDB::get_output_key(const uint64_t &amount, const std::vector<ui
auto get_result = mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_GET_BOTH);
if (get_result == MDB_NOTFOUND)
{
if (allow_partial)
{
MDEBUG("Partial result: " << outputs.size() << "/" << offsets.size());
break;
}
throw1(OUTPUT_DNE((std::string("Attempting to get output pubkey by global index (amount ") + boost::lexical_cast<std::string>(amount) + ", index " + boost::lexical_cast<std::string>(index) + ", count " + boost::lexical_cast<std::string>(get_num_outputs(amount)) + "), but key does not exist").c_str()));
}
else if (get_result)
throw0(DB_ERROR(lmdb_error("Error attempting to retrieve an output pubkey from the db", get_result).c_str()));

2
src/blockchain_db/lmdb/db_lmdb.h
View File

@ -221,7 +221,7 @@ public:
virtual output_data_t get_output_key(const uint64_t& amount, const uint64_t& index);
virtual output_data_t get_output_key(const uint64_t& global_index) const;
virtual void get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs);
virtual void get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs, bool allow_partial = false);
virtual tx_out_index get_output_tx_and_index_from_global(const uint64_t& index) const;
virtual void get_output_tx_and_index_from_global(const std::vector<uint64_t> &global_indices,

2
src/cryptonote_core/blockchain.cpp
View File

@ -3540,7 +3540,7 @@ void Blockchain::output_scan_worker(const uint64_t amount, const std::vector<uin
{
try
{
m_db->get_output_key(amount, offsets, outputs);
m_db->get_output_key(amount, offsets, outputs, true);
}
catch (const std::exception& e)
{