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core: add --db-salvage command line flag

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Use to load the database when the primary meta page is corrupted
This commit is contained in:
moneromooo-monero 2017-07-30 23:59:52 +01:00
parent 181a008aa3
commit c6e200a8ab
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
4 changed files with 14 additions and 1 deletions
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2
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -213,7 +213,7 @@ const std::string lmdb_error(const std::string& error_string, int mdb_res)
inline void lmdb_db_open(MDB_txn* txn, const char* name, int flags, MDB_dbi& dbi, const std::string& error_string)
{
if (auto res = mdb_dbi_open(txn, name, flags, &dbi))
throw0(cryptonote::DB_OPEN_FAILURE(lmdb_error(error_string + " : ", res).c_str()));
throw0(cryptonote::DB_OPEN_FAILURE((lmdb_error(error_string + " : ", res) + std::string(" - you may want to start with --db-salvage")).c_str()));
}

5
src/common/command_line.cpp
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@ -107,6 +107,11 @@ namespace command_line
, "Specify sync option, using format [safe|fast|fastest]:[sync|async]:[nblocks_per_sync]."
, "fast:async:1000"
};
const arg_descriptor<bool> arg_db_salvage = {
"db-salvage"
, "Try to salvage a blockchain database if it seems corrupted"
, false
};
const command_line::arg_descriptor<uint64_t> arg_fast_block_sync = {
"fast-block-sync"
, "Sync up most of the way by using embedded, known block hashes."

1
src/common/command_line.h
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@ -214,6 +214,7 @@ namespace command_line
extern const arg_descriptor<bool> arg_dns_checkpoints;
extern const arg_descriptor<std::string> arg_db_type;
extern const arg_descriptor<std::string> arg_db_sync_mode;
extern const arg_descriptor<bool, false> arg_db_salvage;
extern const arg_descriptor<uint64_t> arg_fast_block_sync;
extern const arg_descriptor<uint64_t> arg_prep_blocks_threads;
extern const arg_descriptor<uint64_t> arg_show_time_stats;

7
src/cryptonote_core/cryptonote_core.cpp
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@ -164,6 +164,7 @@ namespace cryptonote
command_line::add_arg(desc, command_line::arg_prep_blocks_threads);
command_line::add_arg(desc, command_line::arg_fast_block_sync);
command_line::add_arg(desc, command_line::arg_db_sync_mode);
command_line::add_arg(desc, command_line::arg_db_salvage);
command_line::add_arg(desc, command_line::arg_show_time_stats);
command_line::add_arg(desc, command_line::arg_block_sync_size);
command_line::add_arg(desc, command_line::arg_check_updates);
@ -278,6 +279,7 @@ namespace cryptonote
std::string db_type = command_line::get_arg(vm, command_line::arg_db_type);
std::string db_sync_mode = command_line::get_arg(vm, command_line::arg_db_sync_mode);
bool db_salvage = command_line::get_arg(vm, command_line::arg_db_salvage) != 0;
bool fast_sync = command_line::get_arg(vm, command_line::arg_fast_block_sync) != 0;
uint64_t blocks_threads = command_line::get_arg(vm, command_line::arg_prep_blocks_threads);
std::string check_updates_string = command_line::get_arg(vm, command_line::arg_check_updates);
@ -310,12 +312,14 @@ namespace cryptonote
uint64_t DBS_FAST_MODE = 0;
uint64_t DBS_FASTEST_MODE = 0;
uint64_t DBS_SAFE_MODE = 0;
uint64_t DBS_SALVAGE = 0;
if (db_type == "lmdb")
{
db = new BlockchainLMDB();
DBS_SAFE_MODE = MDB_NORDAHEAD;
DBS_FAST_MODE = MDB_NORDAHEAD | MDB_NOSYNC;
DBS_FASTEST_MODE = MDB_NORDAHEAD | MDB_NOSYNC | MDB_WRITEMAP | MDB_MAPASYNC;
DBS_SALVAGE = MDB_PREVSNAPSHOT;
}
else
{
@ -387,6 +391,9 @@ namespace cryptonote
blocks_per_sync = bps;
}
if (db_salvage)
db_flags |= DBS_SALVAGE;
db->open(filename, db_flags);
if(!db->m_open)
return false;