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Don't exclusively drop tor/i2p outgoing cxns in idle loop

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This commit is contained in:
j-berman 2022-05-14 20:11:53 -07:00
parent 8349cfe4a6
commit 2dab31f62f
4 changed files with 65 additions and 29 deletions
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18
src/cryptonote_protocol/cryptonote_protocol_handler.h
View file

@ -113,12 +113,23 @@ namespace cryptonote
const block_queue &get_block_queue() const { return m_block_queue; }
void stop();
void on_connection_close(cryptonote_connection_context &context);
void set_max_out_peers(unsigned int max) { m_max_out_peers = max; }
void set_max_out_peers(epee::net_utils::zone zone, unsigned int max) { CRITICAL_REGION_LOCAL(m_max_out_peers_lock); m_max_out_peers[zone] = max; }
unsigned int get_max_out_peers(epee::net_utils::zone zone) const
{
CRITICAL_REGION_LOCAL(m_max_out_peers_lock);
const auto it = m_max_out_peers.find(zone);
if (it == m_max_out_peers.end())
{
MWARNING(epee::net_utils::zone_to_string(zone) << " max out peers not set, using default");
return P2P_DEFAULT_CONNECTIONS_COUNT;
}
return it->second;
}
bool no_sync() const { return m_no_sync; }
void set_no_sync(bool value) { m_no_sync = value; }
std::string get_peers_overview() const;
std::pair<uint32_t, uint32_t> get_next_needed_pruning_stripe() const;
bool needs_new_sync_connections() const;
bool needs_new_sync_connections(epee::net_utils::zone zone) const;
bool is_busy_syncing();
private:
@ -171,7 +182,8 @@ namespace cryptonote
epee::math_helper::once_a_time_milliseconds<100> m_standby_checker;
epee::math_helper::once_a_time_seconds<101> m_sync_search_checker;
epee::math_helper::once_a_time_seconds<43> m_bad_peer_checker;
std::atomic<unsigned int> m_max_out_peers;
std::unordered_map<epee::net_utils::zone, unsigned int> m_max_out_peers;
mutable epee::critical_section m_max_out_peers_lock;
tools::PerformanceTimer m_sync_timer, m_add_timer;
uint64_t m_last_add_end_time;
uint64_t m_sync_spans_downloaded, m_sync_old_spans_downloaded, m_sync_bad_spans_downloaded;

62
src/cryptonote_protocol/cryptonote_protocol_handler.inl
View file

@ -1776,33 +1776,49 @@ skip:
return true;
MTRACE("Checking for outgoing syncing peers...");
unsigned n_syncing = 0, n_synced = 0;
boost::uuids::uuid last_synced_peer_id(boost::uuids::nil_uuid());
std::unordered_map<epee::net_utils::zone, unsigned> n_syncing, n_synced;
std::unordered_map<epee::net_utils::zone, boost::uuids::uuid> last_synced_peer_id;
std::vector<epee::net_utils::zone> zones;
m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool
{
if (!peer_id || context.m_is_income) // only consider connected outgoing peers
return true;
const epee::net_utils::zone zone = context.m_remote_address.get_zone();
if (n_syncing.find(zone) == n_syncing.end())
{
n_syncing[zone] = 0;
n_synced[zone] = 0;
last_synced_peer_id[zone] = boost::uuids::nil_uuid();
zones.push_back(zone);
}
if (context.m_state == cryptonote_connection_context::state_synchronizing)
++n_syncing;
++n_syncing[zone];
if (context.m_state == cryptonote_connection_context::state_normal)
{
++n_synced;
++n_synced[zone];
if (!context.m_anchor)
last_synced_peer_id = context.m_connection_id;
last_synced_peer_id[zone] = context.m_connection_id;
}
return true;
});
MTRACE(n_syncing << " syncing, " << n_synced << " synced");
// if we're at max out peers, and not enough are syncing
if (n_synced + n_syncing >= m_max_out_peers && n_syncing < P2P_DEFAULT_SYNC_SEARCH_CONNECTIONS_COUNT && last_synced_peer_id != boost::uuids::nil_uuid())
for (const auto& zone : zones)
{
if (!m_p2p->for_connection(last_synced_peer_id, [&](cryptonote_connection_context& ctx, nodetool::peerid_type peer_id, uint32_t f)->bool{
MINFO(ctx << "dropping synced peer, " << n_syncing << " syncing, " << n_synced << " synced");
drop_connection(ctx, false, false);
return true;
}))
MDEBUG("Failed to find peer we wanted to drop");
const unsigned int max_out_peers = get_max_out_peers(zone);
MTRACE("[" << epee::net_utils::zone_to_string(zone) << "] " << n_syncing[zone] << " syncing, " << n_synced[zone] << " synced, " << max_out_peers << " max out peers");
// if we're at max out peers, and not enough are syncing, drop the last sync'd non-anchor
if (n_synced[zone] + n_syncing[zone] >= max_out_peers && n_syncing[zone] < P2P_DEFAULT_SYNC_SEARCH_CONNECTIONS_COUNT && last_synced_peer_id[zone] != boost::uuids::nil_uuid())
{
if (!m_p2p->for_connection(last_synced_peer_id[zone], [&](cryptonote_connection_context& ctx, nodetool::peerid_type peer_id, uint32_t f)->bool{
MINFO(ctx << "dropping synced peer, " << n_syncing[zone] << " syncing, " << n_synced[zone] << " synced, " << max_out_peers << " max out peers");
drop_connection(ctx, false, false);
return true;
}))
MDEBUG("Failed to find peer we wanted to drop");
}
}
return true;
@ -1987,11 +2003,13 @@ skip:
++n_peers_on_next_stripe;
return true;
});
// TODO: investigate tallying by zone and comparing to max out peers by zone
const unsigned int max_out_peers = get_max_out_peers(epee::net_utils::zone::public_);
const uint32_t distance = (peer_stripe + (1<<CRYPTONOTE_PRUNING_LOG_STRIPES) - next_stripe) % (1<<CRYPTONOTE_PRUNING_LOG_STRIPES);
if ((n_out_peers >= m_max_out_peers && n_peers_on_next_stripe == 0) || (distance > 1 && n_peers_on_next_stripe <= 2) || distance > 2)
if ((n_out_peers >= max_out_peers && n_peers_on_next_stripe == 0) || (distance > 1 && n_peers_on_next_stripe <= 2) || distance > 2)
{
MDEBUG(context << "we want seed " << next_stripe << ", and either " << n_out_peers << " is at max out peers ("
<< m_max_out_peers << ") or distance " << distance << " from " << next_stripe << " to " << peer_stripe <<
<< max_out_peers << ") or distance " << distance << " from " << next_stripe << " to " << peer_stripe <<
" is too large and we have only " << n_peers_on_next_stripe << " peers on next seed, dropping connection to make space");
return true;
}
@ -2812,11 +2830,13 @@ skip:
}
return true;
});
const bool use_next = (n_next > m_max_out_peers / 2 && n_subsequent <= 1) || (n_next > 2 && n_subsequent == 0);
// TODO: investigate tallying by zone and comparing to max out peers by zone
const unsigned int max_out_peers = get_max_out_peers(epee::net_utils::zone::public_);
const bool use_next = (n_next > max_out_peers / 2 && n_subsequent <= 1) || (n_next > 2 && n_subsequent == 0);
const uint32_t ret_stripe = use_next ? subsequent_pruning_stripe: next_pruning_stripe;
MIDEBUG(const std::string po = get_peers_overview(), "get_next_needed_pruning_stripe: want height " << want_height << " (" <<
want_height_from_blockchain << " from blockchain, " << want_height_from_block_queue << " from block queue), stripe " <<
next_pruning_stripe << " (" << n_next << "/" << m_max_out_peers << " on it and " << n_subsequent << " on " <<
next_pruning_stripe << " (" << n_next << "/" << max_out_peers << " on it and " << n_subsequent << " on " <<
subsequent_pruning_stripe << ", " << n_others << " others) -> " << ret_stripe << " (+" <<
(ret_stripe - next_pruning_stripe + (1 << CRYPTONOTE_PRUNING_LOG_STRIPES)) % (1 << CRYPTONOTE_PRUNING_LOG_STRIPES) <<
"), current peers " << po);
@ -2824,7 +2844,7 @@ skip:
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::needs_new_sync_connections() const
bool t_cryptonote_protocol_handler<t_core>::needs_new_sync_connections(epee::net_utils::zone zone) const
{
const uint64_t target = m_core.get_target_blockchain_height();
const uint64_t height = m_core.get_current_blockchain_height();
@ -2832,11 +2852,11 @@ skip:
return false;
size_t n_out_peers = 0;
m_p2p->for_each_connection([&](cryptonote_connection_context& ctx, nodetool::peerid_type peer_id, uint32_t support_flags)->bool{
if (!ctx.m_is_income)
if (!ctx.m_is_income && ctx.m_remote_address.get_zone() == zone)
++n_out_peers;
return true;
});
if (n_out_peers >= m_max_out_peers)
if (n_out_peers >= get_max_out_peers(zone))
return false;
return true;
}

10
src/p2p/net_node.inl
View file

@ -538,7 +538,7 @@ namespace nodetool
if ( !set_max_out_peers(public_zone, command_line::get_arg(vm, arg_out_peers) ) )
return false;
else
m_payload_handler.set_max_out_peers(public_zone.m_config.m_net_config.max_out_connection_count);
m_payload_handler.set_max_out_peers(epee::net_utils::zone::public_, public_zone.m_config.m_net_config.max_out_connection_count);
if ( !set_max_in_peers(public_zone, command_line::get_arg(vm, arg_in_peers) ) )
@ -575,6 +575,8 @@ namespace nodetool
if (!set_max_out_peers(zone, proxy.max_connections))
return false;
else
m_payload_handler.set_max_out_peers(proxy.zone, proxy.max_connections);
epee::byte_slice this_noise = nullptr;
if (proxy.noise)
@ -2758,7 +2760,7 @@ namespace nodetool
public_zone->second.m_config.m_net_config.max_out_connection_count = count;
if(current > count)
public_zone->second.m_net_server.get_config_object().del_out_connections(current - count);
m_payload_handler.set_max_out_peers(count);
m_payload_handler.set_max_out_peers(epee::net_utils::zone::public_, count);
}
}
@ -2887,10 +2889,12 @@ namespace nodetool
{
if (m_offline) return true;
if (!m_exclusive_peers.empty()) return true;
if (m_payload_handler.needs_new_sync_connections()) return true;
for (auto& zone : m_network_zones)
{
if (m_payload_handler.needs_new_sync_connections(zone.first))
continue;
if (zone.second.m_net_server.is_stop_signal_sent())
return false;

4
tests/unit_tests/node_server.cpp
View file

@ -1026,12 +1026,12 @@ TEST(node_server, race_condition)
}
void stop() {}
void on_connection_close(context_t &context) {}
void set_max_out_peers(unsigned int max) {}
void set_max_out_peers(epee::net_utils::zone zone, unsigned int max) {}
bool no_sync() const { return {}; }
void set_no_sync(bool value) {}
string_t get_peers_overview() const { return {}; }
stripes_t get_next_needed_pruning_stripe() const { return {}; }
bool needs_new_sync_connections() const { return {}; }
bool needs_new_sync_connections(epee::net_utils::zone zone) const { return {}; }
bool is_busy_syncing() { return {}; }
};
using node_server_t = nodetool::node_server<protocol_t>;