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Merge pull request #451 

ecf0b83 db_bdb: add versioning, to detect incompatible format changes (moneromooo-monero)
f7e9904 db_lmdb: add versioning, to detect incompatible format changes (moneromooo-monero)
This commit is contained in:
Riccardo Spagni 2015-10-27 09:02:46 +02:00
parent 7003e7c156 ecf0b83406
commit 3f6ce0c161
No known key found for this signature in database
GPG Key ID: 55432DF31CCD4FCD
4 changed files with 168 additions and 8 deletions
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81
src/blockchain_db/berkeleydb/db_bdb.cpp
View File

@ -38,6 +38,10 @@
using epee::string_tools::pod_to_hex;
#define DB_DEFAULT_TX (m_write_txn != nullptr ? *m_write_txn : (DbTxn*) nullptr)
// Increase when the DB changes in a non backward compatible way, and there
// is no automatic conversion, so that a full resync is needed.
#define VERSION 0
namespace
{
@ -121,6 +125,8 @@ const char* const BDB_SPENT_KEYS = "spent_keys";
const char* const BDB_HF_STARTING_HEIGHTS = "hf_starting_heights";
const char* const BDB_HF_VERSIONS = "hf_versions";
const char* const BDB_PROPERTIES = "properties";
const unsigned int MB = 1024 * 1024;
// ND: FIXME: db keeps running out of locks when doing full syncs. Possible bug??? Set it to 5K for now.
const unsigned int DB_MAX_LOCKS = 5000;
@ -180,6 +186,22 @@ private:
std::unique_ptr<char[]> m_data;
};
template<>
struct Dbt_copy<const char*>: public Dbt
{
Dbt_copy(const char *s) :
m_data(strdup(s))
{
size_t len = strlen(s) + 1; // include the NUL, makes it easier for compare
set_data(m_data.get());
set_size(len);
set_ulen(len);
set_flags(DB_DBT_USERMEM);
}
private:
std::unique_ptr<char[]> m_data;
};
struct Dbt_safe : public Dbt
{
Dbt_safe()
@ -793,6 +815,8 @@ void BlockchainBDB::open(const std::string& filename, const int db_flags)
m_hf_starting_heights = new Db(m_env, 0);
m_hf_versions = new Db(m_env, 0);
m_properties = new Db(m_env, 0);
// Tell DB about Dbs that need duplicate support
// Note: no need to tell about sorting,
// as the default is insertion order, which we want
@ -845,6 +869,8 @@ void BlockchainBDB::open(const std::string& filename, const int db_flags)
m_hf_starting_heights->open(txn, BDB_HF_STARTING_HEIGHTS, NULL, DB_RECNO, DB_CREATE, 0);
m_hf_versions->open(txn, BDB_HF_VERSIONS, NULL, DB_RECNO, DB_CREATE, 0);
m_properties->open(txn, BDB_PROPERTIES, NULL, DB_HASH, DB_CREATE, 0);
txn.commit();
DB_BTREE_STAT* stats;
@ -865,6 +891,56 @@ void BlockchainBDB::open(const std::string& filename, const int db_flags)
m_num_outputs = stats->bt_nkeys;
delete stats;
// checks for compatibility
bool compatible = true;
Dbt_copy<const char*> key("version");
Dbt_copy<uint32_t> result;
auto get_result = m_properties->get(DB_DEFAULT_TX, &key, &result, 0);
if (get_result == 0)
{
if (result > VERSION)
{
LOG_PRINT_RED_L0("Existing BerkeleyDB database was made by a later version. We don't know how it will change yet.");
compatible = false;
}
else if (VERSION > 0 && result < VERSION)
{
compatible = false;
}
}
else
{
// if not found, but we're on version 0, it's fine. If the DB's empty, it's fine too.
if (VERSION > 0 && m_height > 0)
compatible = false;
}
if (!compatible)
{
m_open = false;
LOG_PRINT_RED_L0("Existing BerkeleyDB database is incompatible with this version.");
LOG_PRINT_RED_L0("Please delete the existing database and resync.");
return;
}
if (1 /* this can't be set readonly atm */)
{
// only write version on an empty DB
if (m_height == 0)
{
Dbt_copy<const char*> k("version");
Dbt_copy<uint32_t> v(VERSION);
auto put_result = m_properties->put(DB_DEFAULT_TX, &k, &v, 0);
if (put_result != 0)
{
m_open = false;
LOG_PRINT_RED_L0("Failed to write version to database.");
return;
}
}
}
// run checkpoint thread
m_run_checkpoint = true;
m_checkpoint_thread.reset(new boost::thread(&BlockchainBDB::checkpoint_worker, this));
@ -920,6 +996,8 @@ void BlockchainBDB::sync()
m_hf_starting_heights->sync(0);
m_hf_versions->sync(0);
m_properties->sync(0);
}
catch (const std::exception& e)
{
@ -1000,6 +1078,9 @@ std::vector<std::string> BlockchainBDB::get_filenames() const
m_hf_versions->get_dbname(pfname, pdbname);
filenames.push_back(fname);
m_properties->get_dbname(pfname, pdbname);
filenames.push_back(fname);
std::vector<std::string> full_paths;
for (auto& filename : filenames)

2
src/blockchain_db/berkeleydb/db_bdb.h
View File

@ -445,6 +445,8 @@ private:
Db* m_hf_starting_heights;
Db* m_hf_versions;
Db* m_properties;
uint64_t m_height;
uint64_t m_num_outputs;
std::string m_folder;

91
src/blockchain_db/lmdb/db_lmdb.cpp
View File

@ -39,6 +39,10 @@
using epee::string_tools::pod_to_hex;
// Increase when the DB changes in a non backward compatible way, and there
// is no automatic conversion, so that a full resync is needed.
#define VERSION 0
namespace
{
@ -122,6 +126,19 @@ private:
std::unique_ptr<char[]> data;
};
template<>
struct MDB_val_copy<const char*>: public MDB_val
{
MDB_val_copy(const char *s) :
data(strdup(s))
{
mv_size = strlen(s) + 1; // include the NUL, makes it easier for compares
mv_data = data.get();
}
private:
std::unique_ptr<char[]> data;
};
auto compare_uint64 = [](const MDB_val *a, const MDB_val *b)
{
const uint64_t va = *(const uint64_t*)a->mv_data;
@ -154,6 +171,13 @@ int compare_hash32(const MDB_val *a, const MDB_val *b)
return 0;
}
int compare_string(const MDB_val *a, const MDB_val *b)
{
const char *va = (const char*) a->mv_data;
const char *vb = (const char*) b->mv_data;
return strcmp(va, vb);
}
const char* const LMDB_BLOCKS = "blocks";
const char* const LMDB_BLOCK_TIMESTAMPS = "block_timestamps";
const char* const LMDB_BLOCK_HEIGHTS = "block_heights";
@ -178,6 +202,8 @@ const char* const LMDB_SPENT_KEYS = "spent_keys";
const char* const LMDB_HF_STARTING_HEIGHTS = "hf_starting_heights";
const char* const LMDB_HF_VERSIONS = "hf_versions";
const char* const LMDB_PROPERTIES = "properties";
inline void lmdb_db_open(MDB_txn* txn, const char* name, int flags, MDB_dbi& dbi, const std::string& error_string)
{
if (mdb_dbi_open(txn, name, flags, &dbi))
@ -1037,6 +1063,8 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
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_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");
mdb_set_dupsort(txn, m_output_amounts, compare_uint64);
mdb_set_dupsort(txn, m_tx_outputs, compare_uint64);
mdb_set_compare(txn, m_spent_keys, compare_hash32);
@ -1046,6 +1074,7 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
mdb_set_compare(txn, m_tx_heights, compare_hash32);
mdb_set_compare(txn, m_hf_starting_heights, compare_uint8);
mdb_set_compare(txn, m_hf_versions, compare_uint64);
mdb_set_compare(txn, m_properties, compare_string);
// get and keep current height
MDB_stat db_stats;
@ -1059,6 +1088,8 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
throw0(DB_ERROR("Failed to query m_output_indices"));
m_num_outputs = db_stats.ms_entries;
bool compatible = true;
// ND: This "new" version of the lmdb database is incompatible with
// the previous version. Ensure that the output_keys database is
// sizeof(output_data_t) in length. Otherwise, inform user and
@ -1077,16 +1108,60 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
// LOG_PRINT_L0("Output keys size: " << v.mv_size);
if(v.mv_size != sizeof(output_data_t))
{
txn.abort();
mdb_env_close(m_env);
m_open = false;
LOG_PRINT_RED_L0("Existing lmdb database is incompatible with this version.");
LOG_PRINT_RED_L0("Please delete the existing database and resync.");
return;
}
compatible = false;
}
MDB_val_copy<const char*> k("version");
MDB_val v;
auto get_result = mdb_get(txn, m_properties, &k, &v);
if(get_result == MDB_SUCCESS)
{
if (*(const uint32_t*)v.mv_data > VERSION)
{
LOG_PRINT_RED_L0("Existing lmdb database was made by a later version. We don't know how it will change yet.");
compatible = false;
}
else if (VERSION > 0 && *(const uint32_t*)v.mv_data < VERSION)
{
compatible = false;
}
}
else
{
// if not found, but we're on version 0, it's fine. If the DB's empty, it's fine too.
if (VERSION > 0 && m_height > 0)
compatible = false;
}
if (!compatible)
{
txn.abort();
mdb_env_close(m_env);
m_open = false;
LOG_PRINT_RED_L0("Existing lmdb database is incompatible with this version.");
LOG_PRINT_RED_L0("Please delete the existing database and resync.");
return;
}
if (!(mdb_flags & MDB_RDONLY))
{
// only write version on an empty DB
if (m_height == 0)
{
MDB_val_copy<const char*> k("version");
MDB_val_copy<uint32_t> v(VERSION);
auto put_result = mdb_put(txn, m_properties, &k, &v, 0);
if (put_result != MDB_SUCCESS)
{
txn.abort();
mdb_env_close(m_env);
m_open = false;
LOG_PRINT_RED_L0("Failed to write version to database.");
return;
}
}
}
// commit the transaction
txn.commit();

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

@ -306,6 +306,8 @@ private:
MDB_dbi m_hf_starting_heights;
MDB_dbi m_hf_versions;
MDB_dbi m_properties;
uint64_t m_height;
uint64_t m_num_outputs;
std::string m_folder;