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protocol: fix reorgs while syncing

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moneromooo-monero 2017-08-12 10:59:27 +01:00
parent 181a008aa3
commit 08abb670e1
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GPG Key ID: 686F07454D6CEFC3
5 changed files with 48 additions and 289 deletions
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4
src/cryptonote_basic/connection_context.h
View File

@ -39,7 +39,8 @@ namespace cryptonote
struct cryptonote_connection_context: public epee::net_utils::connection_context_base
{
cryptonote_connection_context(): m_state(state_befor_handshake), m_remote_blockchain_height(0), m_last_response_height(0) {}
cryptonote_connection_context(): m_state(state_befor_handshake), m_remote_blockchain_height(0), m_last_response_height(0),
m_last_known_hash(cryptonote::null_hash) {}
enum state
{
@ -56,6 +57,7 @@ namespace cryptonote
uint64_t m_last_response_height;
boost::posix_time::ptime m_last_request_time;
epee::copyable_atomic m_callback_request_count; //in debug purpose: problem with double callback rise
crypto::hash m_last_known_hash;
//size_t m_score; TODO: add score calculations
};

109
src/cryptonote_protocol/block_queue.cpp
View File

@ -118,25 +118,6 @@ void block_queue::remove_spans(const boost::uuids::uuid &connection_id, uint64_t
}
}
void block_queue::mark_last_block(uint64_t last_block_height)
{
boost::unique_lock<boost::recursive_mutex> lock(mutex);
if (!blocks.empty() && is_blockchain_placeholder(*blocks.begin()))
blocks.erase(*blocks.begin());
for (block_map::iterator i = blocks.begin(); i != blocks.end(); )
{
block_map::iterator j = i++;
if (j->start_block_height + j->nblocks - 1 <= last_block_height)
{
blocks.erase(j);
}
}
// mark the current state of the db (for a fresh db, it's just the genesis block)
add_blocks(0, last_block_height + 1, boost::uuids::nil_uuid());
MDEBUG("last blocked marked at " << last_block_height);
}
uint64_t block_queue::get_max_block_height() const
{
boost::unique_lock<boost::recursive_mutex> lock(mutex);
@ -171,7 +152,19 @@ std::string block_queue::get_overview() const
return s;
}
std::pair<uint64_t, uint64_t> block_queue::reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time)
bool block_queue::requested(const crypto::hash &hash) const
{
boost::unique_lock<boost::recursive_mutex> lock(mutex);
for (const auto &span: blocks)
{
for (const auto &h: span.hashes)
if (h == hash)
return true;
}
return false;
}
std::pair<uint64_t, uint64_t> block_queue::reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, const std::list<crypto::hash> &block_hashes, boost::posix_time::ptime time)
{
boost::unique_lock<boost::recursive_mutex> lock(mutex);
@ -181,71 +174,25 @@ std::pair<uint64_t, uint64_t> block_queue::reserve_span(uint64_t first_block_hei
return std::make_pair(0, 0);
}
uint64_t max_block_height = get_max_block_height();
if (last_block_height > max_block_height)
max_block_height = last_block_height;
if (max_block_height == 0)
uint64_t span_start_height = last_block_height - block_hashes.size() + 1;
std::list<crypto::hash>::const_iterator i = block_hashes.begin();
while (i != block_hashes.end() && requested(*i))
{
MDEBUG("reserve_span: max_block_height is 0");
return std::make_pair(first_block_height, std::min(last_block_height - first_block_height + 1, max_blocks));
}
uint64_t base = 0, last_placeholder_block = 0;
bool has_placeholder = false;
block_map::const_iterator i = blocks.begin();
if (i != blocks.end() && is_blockchain_placeholder(*i))
{
base = i->start_block_height + i->nblocks;
last_placeholder_block = base - 1;
has_placeholder = true;
++i;
for (block_map::const_iterator j = i; j != blocks.end(); ++j)
{
if (j->start_block_height < base)
base = j->start_block_height;
}
++span_start_height;
}
if (base > first_block_height)
base = first_block_height;
CHECK_AND_ASSERT_MES (base <= max_block_height + 1, std::make_pair(0, 0), "Blockchain placeholder larger than max block height");
std::vector<uint8_t> bitmap(max_block_height + 1 - base, 0);
MDEBUG("base " << base << ", last_placeholder_block " << (has_placeholder ? std::to_string(last_placeholder_block) : "none") << ", first_block_height " << first_block_height);
if (has_placeholder && last_placeholder_block >= base)
memset(bitmap.data(), 1, last_placeholder_block + 1 - base);
while (i != blocks.end())
uint64_t span_length = 0;
std::list<crypto::hash> hashes;
while (i != block_hashes.end() && span_length < max_blocks)
{
CHECK_AND_ASSERT_MES (i->start_block_height >= base, std::make_pair(0, 0), "Span starts before blochckain placeholder");
memset(bitmap.data() + i->start_block_height - base, 1, i->nblocks);
hashes.push_back(*i);
++i;
++span_length;
}
const uint8_t *ptr = (const uint8_t*)memchr(bitmap.data() + first_block_height - base, 0, bitmap.size() - (first_block_height - base));
if (!ptr)
{
MDEBUG("reserve_span: 0 not found in bitmap: " << first_block_height << " " << bitmap.size());
print();
return std::make_pair(0, 0);
}
uint64_t start_block_height = ptr - bitmap.data() + base;
if (start_block_height > last_block_height)
{
MDEBUG("reserve_span: start_block_height > last_block_height: " << start_block_height << " < " << last_block_height);
return std::make_pair(0, 0);
}
if (start_block_height + max_blocks - 1 < first_block_height)
{
MDEBUG("reserve_span: start_block_height + max_blocks - 1 < first_block_height: " << start_block_height << " + " << max_blocks << " - 1 < " << first_block_height);
return std::make_pair(0, 0);
}
uint64_t nblocks = 1;
while (start_block_height + nblocks <= last_block_height && nblocks < max_blocks && bitmap[start_block_height + nblocks - base] == 0)
++nblocks;
MDEBUG("Reserving span " << start_block_height << " - " << (start_block_height + nblocks - 1) << " for " << connection_id);
add_blocks(start_block_height, nblocks, connection_id, time);
return std::make_pair(start_block_height, nblocks);
MDEBUG("Reserving span " << span_start_height << " - " << (span_start_height + span_length - 1) << " for " << connection_id);
add_blocks(span_start_height, span_length, connection_id, time);
set_span_hashes(span_start_height, connection_id, hashes);
return std::make_pair(span_start_height, span_length);
}
bool block_queue::is_blockchain_placeholder(const span &span) const
@ -366,13 +313,15 @@ size_t block_queue::get_num_filled_spans() const
return size;
}
crypto::hash block_queue::get_last_known_hash() const
crypto::hash block_queue::get_last_known_hash(const boost::uuids::uuid &connection_id) const
{
boost::unique_lock<boost::recursive_mutex> lock(mutex);
crypto::hash hash = cryptonote::null_hash;
uint64_t highest_height = 0;
for (const auto &span: blocks)
{
if (span.connection_id != connection_id)
continue;
uint64_t h = span.start_block_height + span.nblocks - 1;
if (h > highest_height && span.hashes.size() == span.nblocks)
{

6
src/cryptonote_protocol/block_queue.h
View File

@ -73,11 +73,10 @@ namespace cryptonote
void flush_stale_spans(const std::set<boost::uuids::uuid> &live_connections);
void remove_span(uint64_t start_block_height);
void remove_spans(const boost::uuids::uuid &connection_id, uint64_t start_block_height);
void mark_last_block(uint64_t last_block_height);
uint64_t get_max_block_height() const;
void print() const;
std::string get_overview() const;
std::pair<uint64_t, uint64_t> reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time = boost::posix_time::microsec_clock::universal_time());
std::pair<uint64_t, uint64_t> reserve_span(uint64_t first_block_height, uint64_t last_block_height, uint64_t max_blocks, const boost::uuids::uuid &connection_id, const std::list<crypto::hash> &block_hashes, boost::posix_time::ptime time = boost::posix_time::microsec_clock::universal_time());
bool is_blockchain_placeholder(const span &span) const;
std::pair<uint64_t, uint64_t> get_start_gap_span() const;
std::pair<uint64_t, uint64_t> get_next_span_if_scheduled(std::list<crypto::hash> &hashes, boost::uuids::uuid &connection_id, boost::posix_time::ptime &time) const;
@ -86,9 +85,10 @@ namespace cryptonote
size_t get_data_size() const;
size_t get_num_filled_spans_prefix() const;
size_t get_num_filled_spans() const;
crypto::hash get_last_known_hash() const;
crypto::hash get_last_known_hash(const boost::uuids::uuid &connection_id) const;
float get_speed(const boost::uuids::uuid &connection_id) const;
bool foreach(std::function<bool(const span&)> f, bool include_blockchain_placeholder = false) const;
bool requested(const crypto::hash &hash) const;
private:
block_map blocks;

30
src/cryptonote_protocol/cryptonote_protocol_handler.inl
View File

@ -947,7 +947,8 @@ namespace cryptonote
}
{
MLOG_YELLOW(el::Level::Debug, "Got NEW BLOCKS inside of " << __FUNCTION__ << ": size: " << arg.blocks.size());
MLOG_YELLOW(el::Level::Debug, context << " Got NEW BLOCKS inside of " << __FUNCTION__ << ": size: " << arg.blocks.size()
<< ", blocks: " << start_height << " - " << (start_height + arg.blocks.size() - 1));
// add that new span to the block queue
const boost::posix_time::time_duration dt = now - context.m_last_request_time;
@ -978,7 +979,6 @@ namespace cryptonote
uint64_t start_height;
std::list<cryptonote::block_complete_entry> blocks;
boost::uuids::uuid span_connection_id;
m_block_queue.mark_last_block(previous_height - 1);
if (!m_block_queue.get_next_span(start_height, blocks, span_connection_id))
{
MDEBUG(context << " no next span found, going back to download");
@ -986,11 +986,6 @@ namespace cryptonote
}
MDEBUG(context << " next span in the queue has blocks " << start_height << "-" << (start_height + blocks.size() - 1)
<< ", we need " << previous_height);
if (previous_height < start_height || previous_height >= start_height + blocks.size())
{
MDEBUG(context << " this span is not what we need, going back to download");
break;
}
const boost::posix_time::ptime start = boost::posix_time::microsec_clock::universal_time();
@ -1083,7 +1078,7 @@ namespace cryptonote
m_core.cleanup_handle_incoming_blocks();
m_block_queue.mark_last_block(m_core.get_current_blockchain_height() - 1);
m_block_queue.remove_spans(span_connection_id, start_height);
if (m_core.get_current_blockchain_height() > previous_height)
{
@ -1201,8 +1196,6 @@ skip:
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::request_missing_objects(cryptonote_connection_context& context, bool check_having_blocks, bool force_next_span)
{
m_block_queue.mark_last_block(m_core.get_current_blockchain_height() - 1);
// flush stale spans
std::set<boost::uuids::uuid> live_connections;
m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool{
@ -1308,8 +1301,13 @@ skip:
context.m_last_response_height = 0;
goto skip;
}
// take out blocks we already have
while (!context.m_needed_objects.empty() && m_core.have_block(context.m_needed_objects.front()))
{
context.m_needed_objects.pop_front();
}
const uint64_t first_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
span = m_block_queue.reserve_span(first_block_height, context.m_last_response_height, count_limit, context.m_connection_id);
span = m_block_queue.reserve_span(first_block_height, context.m_last_response_height, count_limit, context.m_connection_id, context.m_needed_objects);
MDEBUG(context << " span from " << first_block_height << ": " << span.first << "/" << span.second);
}
if (span.second == 0 && !force_next_span)
@ -1360,8 +1358,6 @@ skip:
auto j = it++;
context.m_needed_objects.erase(j);
}
m_block_queue.set_span_hashes(span.first, context.m_connection_id, hashes);
}
context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
@ -1384,10 +1380,9 @@ skip:
if (!start_from_current_chain)
{
// we'll want to start off from where we are on the download side, which may not be added yet
crypto::hash last_known_hash = m_block_queue.get_last_known_hash();
if (last_known_hash != cryptonote::null_hash && r.block_ids.front() != last_known_hash)
r.block_ids.push_front(last_known_hash);
// we'll want to start off from where we are on that peer, which may not be added yet
if (context.m_last_known_hash != cryptonote::null_hash && r.block_ids.front() != context.m_last_known_hash)
r.block_ids.push_front(context.m_last_known_hash);
}
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
@ -1486,6 +1481,7 @@ skip:
{
context.m_needed_objects.push_back(bl_id);
}
context.m_last_known_hash = context.m_needed_objects.back();
if (!request_missing_objects(context, false))
{

188
tests/unit_tests/block_queue.cpp
View File

@ -85,191 +85,3 @@ TEST(block_queue, flush_uuid)
bq.add_blocks(0, 200, uuid1());
ASSERT_EQ(bq.get_max_block_height(), 399);
}
TEST(block_queue, reserve_overlaps_both)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(0, 100, uuid1());
bq.add_blocks(200, 100, uuid1());
ASSERT_EQ(bq.get_max_block_height(), 299);
span = bq.reserve_span(50, 250, 250, uuid2());
ASSERT_EQ(span.first, 100);
ASSERT_EQ(span.second, 100);
}
TEST(block_queue, reserve_overlaps_none)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(0, 100, uuid1());
bq.add_blocks(200, 100, uuid1());
ASSERT_EQ(bq.get_max_block_height(), 299);
span = bq.reserve_span(120, 180, 250, uuid2());
ASSERT_EQ(span.first, 120);
ASSERT_EQ(span.second, 61);
}
TEST(block_queue, reserve_overlaps_none_max_hit)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(0, 100, uuid1());
bq.add_blocks(200, 100, uuid1());
ASSERT_EQ(bq.get_max_block_height(), 299);
span = bq.reserve_span(120, 500, 50, uuid2());
ASSERT_EQ(span.first, 120);
ASSERT_EQ(span.second, 50);
}
TEST(block_queue, reserve_overlaps_start)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(0, 100, uuid1());
bq.add_blocks(200, 100, uuid1());
ASSERT_EQ(bq.get_max_block_height(), 299);
span = bq.reserve_span(50, 150, 250, uuid2());
ASSERT_EQ(span.first, 100);
ASSERT_EQ(span.second, 51);
}
TEST(block_queue, reserve_overlaps_start_max_hit)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(0, 100, uuid1());
bq.add_blocks(200, 100, uuid1());
ASSERT_EQ(bq.get_max_block_height(), 299);
span = bq.reserve_span(50, 300, 75, uuid2());
ASSERT_EQ(span.first, 100);
ASSERT_EQ(span.second, 75);
}
TEST(block_queue, reserve_overlaps_stop)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(0, 100, uuid1());
bq.add_blocks(200, 100, uuid1());
ASSERT_EQ(bq.get_max_block_height(), 299);
span = bq.reserve_span(150, 300, 250, uuid2());
ASSERT_EQ(span.first, 150);
ASSERT_EQ(span.second, 50);
}
TEST(block_queue, reserve_start_is_empty_after)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(100, 100, uuid1());
span = bq.reserve_span(150, 250, 100, uuid1());
ASSERT_EQ(span.first, 200);
ASSERT_EQ(span.second, 51);
}
TEST(block_queue, reserve_start_is_empty_start_fits)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(100, 100, uuid1());
span = bq.reserve_span(0, 250, 50, uuid1());
ASSERT_EQ(span.first, 0);
ASSERT_EQ(span.second, 50);
}
TEST(block_queue, reserve_start_is_empty_start_overflows)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(100, 100, uuid1());
span = bq.reserve_span(0, 250, 150, uuid1());
ASSERT_EQ(span.first, 0);
ASSERT_EQ(span.second, 100);
}
TEST(block_queue, flush_spans)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
bq.add_blocks(100, 100, uuid2());
bq.add_blocks(200, 100, uuid1());
bq.add_blocks(300, 100, uuid2());
ASSERT_EQ(bq.get_max_block_height(), 399);
bq.flush_spans(uuid2());
ASSERT_EQ(bq.get_max_block_height(), 299);
span = bq.reserve_span(0, 500, 500, uuid1());
ASSERT_EQ(span.first, 0);
ASSERT_EQ(span.second, 200);
bq.flush_spans(uuid1());
ASSERT_EQ(bq.get_max_block_height(), 0);
}
TEST(block_queue, get_next_span)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
uint64_t height;
std::list<cryptonote::block_complete_entry> blocks;
boost::uuids::uuid uuid;
bq.add_blocks(100, std::list<cryptonote::block_complete_entry>(100), uuid2(), 0, 0);
bq.add_blocks(200, std::list<cryptonote::block_complete_entry>(101), uuid1(), 0, 0);
bq.add_blocks(300, std::list<cryptonote::block_complete_entry>(102), uuid2(), 0, 0);
ASSERT_TRUE(bq.get_next_span(height, blocks, uuid));
ASSERT_EQ(height, 100);
ASSERT_EQ(blocks.size(), 100);
ASSERT_EQ(uuid, uuid2());
bq.remove_span(height);
ASSERT_TRUE(bq.get_next_span(height, blocks, uuid));
ASSERT_EQ(height, 200);
ASSERT_EQ(blocks.size(), 101);
ASSERT_EQ(uuid, uuid1());
bq.remove_span(height);
ASSERT_TRUE(bq.get_next_span(height, blocks, uuid));
ASSERT_EQ(height, 300);
ASSERT_EQ(blocks.size(), 102);
ASSERT_EQ(uuid, uuid2());
bq.remove_span(height);
ASSERT_FALSE(bq.get_next_span(height, blocks, uuid));
}
TEST(block_queue, get_next_span_if_scheduled)
{
cryptonote::block_queue bq;
std::pair<uint64_t, uint64_t> span;
uint64_t height;
std::list<cryptonote::block_complete_entry> blocks;
boost::uuids::uuid uuid;
std::list<crypto::hash> hashes;
boost::posix_time::ptime time;
bq.reserve_span(0, 100, 100, uuid1());
span = bq.get_next_span_if_scheduled(hashes, uuid, time);
ASSERT_EQ(span.first, 0);
ASSERT_EQ(span.second, 100);
ASSERT_EQ(uuid, uuid1());
bq.add_blocks(0, std::list<cryptonote::block_complete_entry>(100), uuid1(), 0, 0);
span = bq.get_next_span_if_scheduled(hashes, uuid, time);
ASSERT_EQ(span.second, 0);
}