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419 lines
14 KiB
C++
419 lines
14 KiB
C++
// Copyright (c) 2017-2018, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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#include <vector>
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#include <unordered_map>
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#include <boost/uuid/nil_generator.hpp>
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#include "string_tools.h"
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#include "cryptonote_protocol_defs.h"
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#include "block_queue.h"
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#undef MONERO_DEFAULT_LOG_CATEGORY
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#define MONERO_DEFAULT_LOG_CATEGORY "cn.block_queue"
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namespace std {
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static_assert(sizeof(size_t) <= sizeof(boost::uuids::uuid), "boost::uuids::uuid too small");
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template<> struct hash<boost::uuids::uuid> {
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std::size_t operator()(const boost::uuids::uuid &_v) const {
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return reinterpret_cast<const std::size_t &>(_v);
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}
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};
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}
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namespace cryptonote
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{
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void block_queue::add_blocks(uint64_t height, std::list<cryptonote::block_complete_entry> bcel, const boost::uuids::uuid &connection_id, float rate, size_t size)
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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std::list<crypto::hash> hashes;
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bool has_hashes = remove_span(height, &hashes);
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blocks.insert(span(height, std::move(bcel), connection_id, rate, size));
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if (has_hashes)
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set_span_hashes(height, connection_id, hashes);
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}
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void block_queue::add_blocks(uint64_t height, uint64_t nblocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time)
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{
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CHECK_AND_ASSERT_THROW_MES(nblocks > 0, "Empty span");
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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blocks.insert(span(height, nblocks, connection_id, time));
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}
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void block_queue::flush_spans(const boost::uuids::uuid &connection_id, bool all)
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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block_map::iterator i = blocks.begin();
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while (i != blocks.end())
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{
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block_map::iterator j = i++;
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if (j->connection_id == connection_id && (all || j->blocks.size() == 0))
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{
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blocks.erase(j);
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}
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}
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}
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void block_queue::flush_stale_spans(const std::set<boost::uuids::uuid> &live_connections)
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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block_map::iterator i = blocks.begin();
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if (i != blocks.end() && is_blockchain_placeholder(*i))
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++i;
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while (i != blocks.end())
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{
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block_map::iterator j = i++;
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if (live_connections.find(j->connection_id) == live_connections.end() && j->blocks.size() == 0)
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{
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blocks.erase(j);
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}
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}
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}
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bool block_queue::remove_span(uint64_t start_block_height, std::list<crypto::hash> *hashes)
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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for (block_map::iterator i = blocks.begin(); i != blocks.end(); ++i)
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{
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if (i->start_block_height == start_block_height)
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{
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if (hashes)
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*hashes = std::move(i->hashes);
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blocks.erase(i);
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return true;
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}
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}
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return false;
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}
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void block_queue::remove_spans(const boost::uuids::uuid &connection_id, uint64_t start_block_height)
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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for (block_map::iterator i = blocks.begin(); i != blocks.end(); )
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{
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block_map::iterator j = i++;
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if (j->connection_id == connection_id && j->start_block_height <= start_block_height)
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{
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blocks.erase(j);
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}
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}
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}
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uint64_t block_queue::get_max_block_height() const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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uint64_t height = 0;
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for (const auto &span: blocks)
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{
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const uint64_t h = span.start_block_height + span.nblocks - 1;
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if (h > height)
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height = h;
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}
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return height;
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}
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void block_queue::print() const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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MDEBUG("Block queue has " << blocks.size() << " spans");
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for (const auto &span: blocks)
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MDEBUG(" " << span.start_block_height << " - " << (span.start_block_height+span.nblocks-1) << " (" << span.nblocks << ") - " << (is_blockchain_placeholder(span) ? "blockchain" : span.blocks.empty() ? "scheduled" : "filled ") << " " << span.connection_id << " (" << ((unsigned)(span.rate*10/1024.f))/10.f << " kB/s)");
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}
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std::string block_queue::get_overview() const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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if (blocks.empty())
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return "[]";
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block_map::const_iterator i = blocks.begin();
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std::string s = std::string("[") + std::to_string(i->start_block_height + i->nblocks - 1) + ":";
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while (++i != blocks.end())
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s += i->blocks.empty() ? "." : "o";
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s += "]";
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return s;
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}
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bool block_queue::requested(const crypto::hash &hash) const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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for (const auto &span: blocks)
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{
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for (const auto &h: span.hashes)
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if (h == hash)
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return true;
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}
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return false;
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}
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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)
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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if (last_block_height < first_block_height || max_blocks == 0)
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{
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MDEBUG("reserve_span: early out: first_block_height " << first_block_height << ", last_block_height " << last_block_height << ", max_blocks " << max_blocks);
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return std::make_pair(0, 0);
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}
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uint64_t span_start_height = last_block_height - block_hashes.size() + 1;
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std::list<crypto::hash>::const_iterator i = block_hashes.begin();
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while (i != block_hashes.end() && requested(*i))
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{
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++i;
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++span_start_height;
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}
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uint64_t span_length = 0;
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std::list<crypto::hash> hashes;
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while (i != block_hashes.end() && span_length < max_blocks)
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{
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hashes.push_back(*i);
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++i;
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++span_length;
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}
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if (span_length == 0)
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return std::make_pair(0, 0);
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MDEBUG("Reserving span " << span_start_height << " - " << (span_start_height + span_length - 1) << " for " << connection_id);
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add_blocks(span_start_height, span_length, connection_id, time);
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set_span_hashes(span_start_height, connection_id, hashes);
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return std::make_pair(span_start_height, span_length);
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}
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bool block_queue::is_blockchain_placeholder(const span &span) const
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{
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return span.connection_id == boost::uuids::nil_uuid();
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}
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std::pair<uint64_t, uint64_t> block_queue::get_start_gap_span() const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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if (blocks.empty())
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return std::make_pair(0, 0);
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block_map::const_iterator i = blocks.begin();
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if (!is_blockchain_placeholder(*i))
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return std::make_pair(0, 0);
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uint64_t current_height = i->start_block_height + i->nblocks - 1;
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++i;
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if (i == blocks.end())
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return std::make_pair(0, 0);
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uint64_t first_span_height = i->start_block_height;
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if (first_span_height <= current_height + 1)
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return std::make_pair(0, 0);
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MDEBUG("Found gap at start of spans: last blockchain block height " << current_height << ", first span's block height " << first_span_height);
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print();
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return std::make_pair(current_height + 1, first_span_height - current_height - 1);
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}
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std::pair<uint64_t, uint64_t> block_queue::get_next_span_if_scheduled(std::list<crypto::hash> &hashes, boost::uuids::uuid &connection_id, boost::posix_time::ptime &time) const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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if (blocks.empty())
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return std::make_pair(0, 0);
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block_map::const_iterator i = blocks.begin();
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if (is_blockchain_placeholder(*i))
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++i;
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if (i == blocks.end())
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return std::make_pair(0, 0);
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if (!i->blocks.empty())
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return std::make_pair(0, 0);
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hashes = i->hashes;
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connection_id = i->connection_id;
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time = i->time;
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return std::make_pair(i->start_block_height, i->nblocks);
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}
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void block_queue::set_span_hashes(uint64_t start_height, const boost::uuids::uuid &connection_id, std::list<crypto::hash> hashes)
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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for (block_map::iterator i = blocks.begin(); i != blocks.end(); ++i)
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{
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if (i->start_block_height == start_height && i->connection_id == connection_id)
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{
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span s = *i;
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blocks.erase(i);
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s.hashes = std::move(hashes);
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blocks.insert(s);
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return;
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}
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}
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}
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bool block_queue::get_next_span(uint64_t &height, std::list<cryptonote::block_complete_entry> &bcel, boost::uuids::uuid &connection_id, bool filled) const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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if (blocks.empty())
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return false;
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block_map::const_iterator i = blocks.begin();
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if (is_blockchain_placeholder(*i))
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++i;
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for (; i != blocks.end(); ++i)
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{
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if (!filled || !i->blocks.empty())
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{
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height = i->start_block_height;
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bcel = i->blocks;
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connection_id = i->connection_id;
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return true;
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}
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}
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return false;
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}
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bool block_queue::has_next_span(const boost::uuids::uuid &connection_id, bool &filled) const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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if (blocks.empty())
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return false;
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block_map::const_iterator i = blocks.begin();
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if (is_blockchain_placeholder(*i))
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++i;
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if (i == blocks.end())
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return false;
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if (i->connection_id != connection_id)
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return false;
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filled = !i->blocks.empty();
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return true;
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}
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size_t block_queue::get_data_size() const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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size_t size = 0;
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for (const auto &span: blocks)
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size += span.size;
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return size;
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}
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size_t block_queue::get_num_filled_spans_prefix() const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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if (blocks.empty())
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return 0;
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block_map::const_iterator i = blocks.begin();
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if (is_blockchain_placeholder(*i))
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++i;
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size_t size = 0;
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while (i != blocks.end() && !i->blocks.empty())
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{
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++i;
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++size;
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}
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return size;
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}
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size_t block_queue::get_num_filled_spans() const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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size_t size = 0;
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for (const auto &span: blocks)
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if (!span.blocks.empty())
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++size;
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return size;
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}
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crypto::hash block_queue::get_last_known_hash(const boost::uuids::uuid &connection_id) const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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crypto::hash hash = crypto::null_hash;
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uint64_t highest_height = 0;
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for (const auto &span: blocks)
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{
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if (span.connection_id != connection_id)
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continue;
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uint64_t h = span.start_block_height + span.nblocks - 1;
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if (h > highest_height && span.hashes.size() == span.nblocks)
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{
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hash = span.hashes.back();
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highest_height = h;
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}
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}
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return hash;
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}
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bool block_queue::has_spans(const boost::uuids::uuid &connection_id) const
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{
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for (const auto &span: blocks)
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{
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if (span.connection_id == connection_id)
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return true;
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}
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return false;
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}
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float block_queue::get_speed(const boost::uuids::uuid &connection_id) const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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std::unordered_map<boost::uuids::uuid, float> speeds;
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for (const auto &span: blocks)
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{
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if (span.blocks.empty())
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continue;
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// note that the average below does not average over the whole set, but over the
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// previous pseudo average and the latest rate: this gives much more importance
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// to the latest measurements, which is fine here
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std::unordered_map<boost::uuids::uuid, float>::iterator i = speeds.find(span.connection_id);
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if (i == speeds.end())
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speeds.insert(std::make_pair(span.connection_id, span.rate));
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else
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i->second = (i->second + span.rate) / 2;
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}
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float conn_rate = -1, best_rate = 0;
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for (const auto &i: speeds)
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{
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if (i.first == connection_id)
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conn_rate = i.second;
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if (i.second > best_rate)
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best_rate = i.second;
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}
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if (conn_rate <= 0)
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return 1.0f; // not found, assume good speed
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if (best_rate == 0)
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return 1.0f; // everything dead ? Can't happen, but let's trap anyway
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const float speed = conn_rate / best_rate;
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MTRACE(" Relative speed for " << connection_id << ": " << speed << " (" << conn_rate << "/" << best_rate);
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return speed;
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}
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bool block_queue::foreach(std::function<bool(const span&)> f, bool include_blockchain_placeholder) const
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{
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boost::unique_lock<boost::recursive_mutex> lock(mutex);
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block_map::const_iterator i = blocks.begin();
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if (!include_blockchain_placeholder && i != blocks.end() && is_blockchain_placeholder(*i))
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++i;
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while (i != blocks.end())
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if (!f(*i++))
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return false;
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return true;
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}
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}
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