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db_lmdb: do not try to modify the database in read only mode

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moneromooo-monero 2016-08-26 19:33:25 +01:00
parent 63ba2447e2
commit f88029e72a
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 12 additions and 4 deletions
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16
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -1084,7 +1084,12 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
lmdb_db_open(txn, LMDB_SPENT_KEYS, MDB_INTEGERKEY | MDB_CREATE | MDB_DUPSORT | MDB_DUPFIXED, m_spent_keys, "Failed to open db handle for m_spent_keys");
lmdb_db_open(txn, LMDB_HF_STARTING_HEIGHTS, MDB_CREATE, m_hf_starting_heights, "Failed to open db handle for m_hf_starting_heights");
// this subdb is dropped on sight, so it may not be present when we open the DB.
// Since we use MDB_CREATE, we'll get an exception if we open read-only and it does not exist.
// So we don't open for read-only, and also not drop below. It is not used elsewhere.
if (!(mdb_flags & MDB_RDONLY))
lmdb_db_open(txn, LMDB_HF_STARTING_HEIGHTS, MDB_CREATE, m_hf_starting_heights, "Failed to open db handle for m_hf_starting_heights");
lmdb_db_open(txn, LMDB_HF_VERSIONS, MDB_INTEGERKEY | MDB_CREATE, m_hf_versions, "Failed to open db handle for m_hf_versions");
lmdb_db_open(txn, LMDB_PROPERTIES, MDB_CREATE, m_properties, "Failed to open db handle for m_properties");
@ -1098,9 +1103,12 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
mdb_set_compare(txn, m_properties, compare_string);
result = mdb_drop(txn, m_hf_starting_heights, 1);
if (result)
throw0(DB_ERROR(lmdb_error("Failed to drop m_hf_starting_heights: ", result).c_str()));
if (!(mdb_flags & MDB_RDONLY))
{
result = mdb_drop(txn, m_hf_starting_heights, 1);
if (result)
throw0(DB_ERROR(lmdb_error("Failed to drop m_hf_starting_heights: ", result).c_str()));
}
// get and keep current height
MDB_stat db_stats;