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BlockchainBDB: Check if hard fork subdbs need reset 

See f7e337e625 for LMDB equivalent.
This commit is contained in:
warptangent 2016-02-18 06:38:44 -08:00
parent 47f6cf8bea
commit 57e75fa33f
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GPG Key ID: 0E490BEBFBE4E92D
1 changed files with 50 additions and 1 deletions
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51
src/blockchain_db/berkeleydb/db_bdb.cpp
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@ -2210,7 +2210,56 @@ uint64_t BlockchainBDB::get_hard_fork_starting_height(uint8_t version) const
void BlockchainBDB::check_hard_fork_info()
{
/* FIXME: Some other time */
LOG_PRINT_L3("BlockchainBDB::" << __func__);
check_open();
if (m_hf_versions == nullptr)
{
LOG_PRINT_L0("hf versions DB not open, so not checking");
return;
}
DB_BTREE_STAT* db_stat1, * db_stat2;
// DB_FAST_STAT can apparently cause an incorrect number of records
// to be returned. The flag should be set to 0 instead if this proves
// to be the case.
// Set txn to NULL and DB_FAST_STAT to zero (0) for reliability.
m_blocks->stat(NULL, &db_stat1, 0);
m_hf_versions->stat(NULL, &db_stat2, 0);
if (db_stat1->bt_nkeys != db_stat2->bt_nkeys)
{
LOG_PRINT_L0("num blocks " << db_stat1->bt_nkeys << " != " << "num hf_versions " << db_stat2->bt_nkeys << " - will clear the two hard fork DBs");
bdb_txn_safe txn;
bdb_txn_safe* txn_ptr = &txn;
if (m_write_txn)
txn_ptr = m_write_txn;
else
{
if (m_env->txn_begin(NULL, txn, 0))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
try
{
uint32_t count;
m_hf_starting_heights->truncate(*txn_ptr, &count, 0);
LOG_PRINT_L0("hf_starting_heights count: " << count);
m_hf_versions->truncate(*txn_ptr, &count, 0);
LOG_PRINT_L0("hf_versions count: " << count);
if (!m_write_txn)
txn.commit();
}
catch (const std::exception& e)
{
throw0(DB_ERROR(std::string("Failed to clear two hard fork DBs: ").append(e.what()).c_str()));
}
}
delete db_stat1;
delete db_stat2;
}
void BlockchainBDB::drop_hard_fork_info()