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blockchain_blackball: more optimizations

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moneromooo-monero 2018-08-19 16:52:56 +00:00
parent b66ba78306
commit 4bce935b40
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 86 additions and 45 deletions
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111
src/blockchain_utilities/blockchain_blackball.cpp
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@ -293,14 +293,24 @@ static void close()
static std::string compress_ring(const std::vector<uint64_t> &ring, std::string s = "")
{
const size_t sz = s.size();
s.resize(s.size() + 12 * ring.size());
char *ptr = (char*)s.data() + sz;
for (uint64_t out: ring)
s += tools::get_varint_data(out);
tools::write_varint(ptr, out);
if (ptr > s.data() + sz + 12 * ring.size())
throw std::runtime_error("varint output overflow");
s.resize(ptr - s.data());
return s;
}
static std::string compress_ring(uint64_t amount, const std::vector<uint64_t> &ring)
{
return compress_ring(ring, tools::get_varint_data(amount));
char s[12], *ptr = s;
tools::write_varint(ptr, amount);
if (ptr > s + sizeof(s))
throw std::runtime_error("varint output overflow");
return compress_ring(ring, std::string(s, ptr-s));
}
static std::vector<uint64_t> decompress_ring(const std::string &s)
@ -518,27 +528,19 @@ static uint64_t get_num_spent_outputs()
return count;
}
static void add_spent_output(MDB_txn *txn, const output_data &od)
static void add_spent_output(MDB_cursor *cur, const output_data &od)
{
MDB_cursor *cur;
int dbr = mdb_cursor_open(txn, dbi_spent, &cur);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to open cursor for spent outputs: " + std::string(mdb_strerror(dbr)));
MDB_val v = {sizeof(od), (void*)&od};
dbr = mdb_cursor_put(cur, (MDB_val *)&zerokval, &v, MDB_NODUPDATA);
int dbr = mdb_cursor_put(cur, (MDB_val *)&zerokval, &v, MDB_NODUPDATA);
CHECK_AND_ASSERT_THROW_MES(!dbr || dbr == MDB_KEYEXIST, "Failed to add spent output: " + std::string(mdb_strerror(dbr)));
mdb_cursor_close(cur);
}
static bool is_output_spent(MDB_txn *txn, const output_data &od)
static bool is_output_spent(MDB_cursor *cur, const output_data &od)
{
MDB_cursor *cur;
int dbr = mdb_cursor_open(txn, dbi_spent, &cur);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to open cursor for spent outputs: " + std::string(mdb_strerror(dbr)));
MDB_val v = {sizeof(od), (void*)&od};
dbr = mdb_cursor_get(cur, (MDB_val *)&zerokval, &v, MDB_GET_BOTH);
int dbr = mdb_cursor_get(cur, (MDB_val *)&zerokval, &v, MDB_GET_BOTH);
CHECK_AND_ASSERT_THROW_MES(!dbr || dbr == MDB_NOTFOUND, "Failed to get spent output: " + std::string(mdb_strerror(dbr)));
bool spent = dbr == 0;
mdb_cursor_close(cur);
return spent;
}
@ -612,7 +614,6 @@ static void set_processed_txidx(MDB_txn *txn, const std::string &name, uint64_t
static bool get_relative_ring(MDB_txn *txn, const crypto::key_image &ki, std::vector<uint64_t> &ring)
{
const std::string sring = compress_ring(ring);
MDB_val k, v;
k.mv_data = (void*)&ki;
k.mv_size = sizeof(ki);
@ -665,10 +666,11 @@ static uint64_t get_ring_subset_instances(MDB_txn *txn, uint64_t amount, const s
return instances;
uint64_t extra = 0;
for (uint64_t mask = 1; mask < (1u << ring.size()) - 1; ++mask)
{
std::vector<uint64_t> subset;
subset.reserve(ring.size());
for (uint64_t mask = 1; mask < (1u << ring.size()) - 1; ++mask)
{
subset.resize(0);
for (size_t i = 0; i < ring.size(); ++i)
if ((mask >> i) & 1)
subset.push_back(ring[i]);
@ -677,16 +679,28 @@ static uint64_t get_ring_subset_instances(MDB_txn *txn, uint64_t amount, const s
return instances + extra;
}
static void set_ring_instances(MDB_txn *txn, uint64_t amount, const std::vector<uint64_t> &ring, uint64_t count)
static uint64_t inc_ring_instances(MDB_txn *txn, uint64_t amount, const std::vector<uint64_t> &ring)
{
const std::string sring = keep_under_511(compress_ring(amount, ring));
MDB_val k, v;
k.mv_data = (void*)sring.data();
k.mv_size = sring.size();
int dbr = mdb_get(txn, dbi_ring_instances, &k, &v);
CHECK_AND_ASSERT_THROW_MES(!dbr || dbr == MDB_NOTFOUND, "Failed to get ring instances: " + std::string(mdb_strerror(dbr)));
uint64_t count;
if (dbr == MDB_NOTFOUND)
count = 1;
else
count = 1 + *(const uint64_t*)v.mv_data;
v.mv_data = &count;
v.mv_size = sizeof(count);
int dbr = mdb_put(txn, dbi_ring_instances, &k, &v, 0);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to get ring instances: " + std::string(mdb_strerror(dbr)));
dbr = mdb_put(txn, dbi_ring_instances, &k, &v, 0);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to set ring instances: " + std::string(mdb_strerror(dbr)));
return count;
}
static std::vector<crypto::key_image> get_key_images(MDB_txn *txn, const output_data &od)
@ -899,6 +913,7 @@ int main(int argc, char* argv[])
};
const command_line::arg_descriptor<bool> arg_rct_only = {"rct-only", "Only work on ringCT outputs", false};
const command_line::arg_descriptor<bool> arg_check_subsets = {"check-subsets", "Check ring subsets (very expensive)", false};
const command_line::arg_descriptor<bool> arg_verbose = {"verbose", "Verbose output)", false};
const command_line::arg_descriptor<std::vector<std::string> > arg_inputs = {"inputs", "Path to Monero DB, and path to any fork DBs"};
const command_line::arg_descriptor<std::string> arg_db_sync_mode = {
"db-sync-mode"
@ -911,6 +926,7 @@ int main(int argc, char* argv[])
command_line::add_arg(desc_cmd_sett, arg_database);
command_line::add_arg(desc_cmd_sett, arg_rct_only);
command_line::add_arg(desc_cmd_sett, arg_check_subsets);
command_line::add_arg(desc_cmd_sett, arg_verbose);
command_line::add_arg(desc_cmd_sett, arg_db_sync_mode);
command_line::add_arg(desc_cmd_sett, arg_inputs);
command_line::add_arg(desc_cmd_only, command_line::arg_help);
@ -950,6 +966,7 @@ int main(int argc, char* argv[])
output_file_path = command_line::get_arg(vm, arg_blackball_db_dir);
bool opt_rct_only = command_line::get_arg(vm, arg_rct_only);
bool opt_check_subsets = command_line::get_arg(vm, arg_check_subsets);
bool opt_verbose = command_line::get_arg(vm, arg_verbose);
std::string db_type = command_line::get_arg(vm, arg_database);
if (!cryptonote::blockchain_valid_db_type(db_type))
@ -1011,6 +1028,9 @@ int main(int argc, char* argv[])
MDB_txn *txn;
int dbr = mdb_txn_begin(env, NULL, 0, &txn);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to create LMDB transaction: " + std::string(mdb_strerror(dbr)));
MDB_cursor *cur;
dbr = mdb_cursor_open(txn, dbi_spent, &cur);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to open LMDB cursor: " + std::string(mdb_strerror(dbr)));
size_t records = 0;
const std::string filename = inputs[n];
std::vector<crypto::public_key> blackballs;
@ -1034,16 +1054,17 @@ int main(int argc, char* argv[])
std::vector<uint64_t> relative_ring;
std::vector<uint64_t> new_ring = canonicalize(txin.key_offsets);
const uint32_t ring_size = txin.key_offsets.size();
uint64_t instances = get_ring_instances(txn, txin.amount, new_ring);
++instances;
set_ring_instances(txn, txin.amount, new_ring, instances);
const uint64_t instances = inc_ring_instances(txn, txin.amount, new_ring);
if (n == 0 && ring_size == 1)
{
const crypto::public_key pkey = get_output_key(cur0, txin.amount, absolute[0]);
if (opt_verbose)
{
MINFO("Blackballing output " << pkey << ", due to being used in a 1-ring");
std::cout << "\r" << start_idx << "/" << n_txes << " \r" << std::flush;
}
blackballs.push_back(pkey);
add_spent_output(txn, output_data(txin.amount, absolute[0]));
add_spent_output(cur, output_data(txin.amount, absolute[0]));
inc_stat(txn, txin.amount ? "pre-rct-ring-size-1" : "rct-ring-size-1");
}
else if (n == 0 && instances == new_ring.size())
@ -1051,10 +1072,13 @@ int main(int argc, char* argv[])
for (size_t o = 0; o < new_ring.size(); ++o)
{
const crypto::public_key pkey = get_output_key(cur0, txin.amount, absolute[o]);
if (opt_verbose)
{
MINFO("Blackballing output " << pkey << ", due to being used in " << new_ring.size() << " identical " << new_ring.size() << "-rings");
std::cout << "\r" << start_idx << "/" << n_txes << " \r" << std::flush;
}
blackballs.push_back(pkey);
add_spent_output(txn, output_data(txin.amount, absolute[o]));
add_spent_output(cur, output_data(txin.amount, absolute[o]));
inc_stat(txn, txin.amount ? "pre-rct-duplicate-rings" : "rct-duplicate-rings");
}
}
@ -1063,10 +1087,13 @@ int main(int argc, char* argv[])
for (size_t o = 0; o < new_ring.size(); ++o)
{
const crypto::public_key pkey = get_output_key(cur0, txin.amount, absolute[o]);
if (opt_verbose)
{
MINFO("Blackballing output " << pkey << ", due to being used in " << new_ring.size() << " subsets of " << new_ring.size() << "-rings");
std::cout << "\r" << start_idx << "/" << n_txes << " \r" << std::flush;
}
blackballs.push_back(pkey);
add_spent_output(txn, output_data(txin.amount, absolute[o]));
add_spent_output(cur, output_data(txin.amount, absolute[o]));
inc_stat(txn, txin.amount ? "pre-rct-subset-rings" : "rct-subset-rings");
}
}
@ -1096,10 +1123,13 @@ int main(int argc, char* argv[])
else if (common.size() == 1)
{
const crypto::public_key pkey = get_output_key(cur0, txin.amount, common[0]);
if (opt_verbose)
{
MINFO("Blackballing output " << pkey << ", due to being used in rings with a single common element");
std::cout << "\r" << start_idx << "/" << n_txes << " \r" << std::flush;
}
blackballs.push_back(pkey);
add_spent_output(txn, output_data(txin.amount, common[0]));
add_spent_output(cur, output_data(txin.amount, common[0]));
inc_stat(txn, txin.amount ? "pre-rct-key-image-attack" : "rct-key-image-attack");
}
else
@ -1116,22 +1146,25 @@ int main(int argc, char* argv[])
if (n == 0)
set_relative_ring(txn, txin.k_image, new_ring);
}
if (!blackballs.empty())
{
ringdb.blackball(blackballs);
blackballs.clear();
}
set_processed_txidx(txn, canonical, start_idx+1);
++records;
if (records >= records_per_sync)
{
if (!blackballs.empty())
{
ringdb.blackball(blackballs);
blackballs.clear();
}
mdb_cursor_close(cur);
dbr = mdb_txn_commit(txn);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to commit txn creating/opening database: " + std::string(mdb_strerror(dbr)));
int dbr = resize_env(cache_dir.c_str());
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to resize LMDB database: " + std::string(mdb_strerror(dbr)));
dbr = mdb_txn_begin(env, NULL, 0, &txn);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to create LMDB transaction: " + std::string(mdb_strerror(dbr)));
dbr = mdb_cursor_open(txn, dbi_spent, &cur);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to open LMDB cursor: " + std::string(mdb_strerror(dbr)));
records = 0;
}
@ -1142,6 +1175,7 @@ int main(int argc, char* argv[])
}
return true;
});
mdb_cursor_close(cur);
dbr = mdb_txn_commit(txn);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to commit txn creating/opening database: " + std::string(mdb_strerror(dbr)));
LOG_PRINT_L0("blockchain from " << inputs[n] << " processed till tx idx " << start_idx);
@ -1173,6 +1207,9 @@ int main(int argc, char* argv[])
MDB_txn *txn;
dbr = mdb_txn_begin(env, NULL, 0, &txn);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to create LMDB transaction: " + std::string(mdb_strerror(dbr)));
MDB_cursor *cur;
dbr = mdb_cursor_open(txn, dbi_spent, &cur);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to open LMDB cursor: " + std::string(mdb_strerror(dbr)));
std::vector<crypto::public_key> blackballs;
std::vector<output_data> scan_spent = std::move(work_spent);
@ -1190,18 +1227,21 @@ int main(int argc, char* argv[])
for (uint64_t out: absolute)
{
output_data new_od(od.amount, out);
if (is_output_spent(txn, new_od))
if (is_output_spent(cur, new_od))
++known;
else
last_unknown = out;
}
if (known == absolute.size() - 1 && !is_output_spent(txn, output_data(od.amount, last_unknown)))
if (known == absolute.size() - 1)
{
const crypto::public_key pkey = get_output_key(cur0, od.amount, last_unknown);
if (opt_verbose)
{
MINFO("Blackballing output " << pkey << ", due to being used in a " <<
absolute.size() << "-ring where all other outputs are known to be spent");
}
blackballs.push_back(pkey);
add_spent_output(txn, output_data(od.amount, last_unknown));
add_spent_output(cur, output_data(od.amount, last_unknown));
work_spent.push_back(output_data(od.amount, last_unknown));
inc_stat(txn, od.amount ? "pre-rct-chain-reaction" : "rct-chain-reaction");
}
@ -1218,6 +1258,7 @@ int main(int argc, char* argv[])
ringdb.blackball(blackballs);
blackballs.clear();
}
mdb_cursor_close(cur);
dbr = mdb_txn_commit(txn);
CHECK_AND_ASSERT_THROW_MES(!dbr, "Failed to commit txn creating/opening database: " + std::string(mdb_strerror(dbr)));
}