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[net processing] Add m_tx_relay_mutex to protect m_tx_relay ptr

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This commit is contained in:
John Newbery 2021-08-27 09:28:02 +01:00
parent 290a8dab02
commit b0a4ac9c26
1 changed files with 80 additions and 72 deletions
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152
src/net_processing.cpp
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@ -280,9 +280,17 @@ struct Peer {
std::atomic<CAmount> m_fee_filter_received{0};
};
Mutex m_tx_relay_mutex;
/** Transaction relay data. Will be a nullptr if we're not relaying
* transactions with this peer (e.g. if it's a block-relay-only peer) */
std::unique_ptr<TxRelay> m_tx_relay;
* transactions with this peer (e.g. if it's a block-relay-only peer).
* Users should access this with the GetTxRelay() getter. */
std::unique_ptr<TxRelay> m_tx_relay GUARDED_BY(m_tx_relay_mutex);
TxRelay* GetTxRelay()
{
return WITH_LOCK(m_tx_relay_mutex, return m_tx_relay.get());
};
/** A vector of addresses to send to the peer, limited to MAX_ADDR_TO_SEND. */
std::vector<CAddress> m_addrs_to_send;
@ -896,10 +904,11 @@ static void PushAddress(Peer& peer, const CAddress& addr, FastRandomContext& ins
static void AddKnownTx(Peer& peer, const uint256& hash)
{
if (peer.m_tx_relay != nullptr) {
LOCK(peer.m_tx_relay->m_tx_inventory_mutex);
peer.m_tx_relay->m_tx_inventory_known_filter.insert(hash);
}
auto tx_relay = peer.GetTxRelay();
if (!tx_relay) return;
LOCK(tx_relay->m_tx_inventory_mutex);
tx_relay->m_tx_inventory_known_filter.insert(hash);
}
std::chrono::microseconds PeerManagerImpl::NextInvToInbounds(std::chrono::microseconds now,
@ -1392,9 +1401,9 @@ bool PeerManagerImpl::GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats) c
ping_wait = GetTime<std::chrono::microseconds>() - peer->m_ping_start.load();
}
if (peer->m_tx_relay != nullptr) {
stats.m_relay_txs = WITH_LOCK(peer->m_tx_relay->m_bloom_filter_mutex, return peer->m_tx_relay->m_relay_txs);
stats.m_fee_filter_received = peer->m_tx_relay->m_fee_filter_received.load();
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
stats.m_relay_txs = WITH_LOCK(tx_relay->m_bloom_filter_mutex, return tx_relay->m_relay_txs);
stats.m_fee_filter_received = tx_relay->m_fee_filter_received.load();
} else {
stats.m_relay_txs = false;
stats.m_fee_filter_received = 0;
@ -1810,12 +1819,13 @@ void PeerManagerImpl::RelayTransaction(const uint256& txid, const uint256& wtxid
LOCK(m_peer_mutex);
for(auto& it : m_peer_map) {
Peer& peer = *it.second;
if (!peer.m_tx_relay) continue;
auto tx_relay = peer.GetTxRelay();
if (!tx_relay) continue;
const uint256& hash{peer.m_wtxid_relay ? wtxid : txid};
LOCK(peer.m_tx_relay->m_tx_inventory_mutex);
if (!peer.m_tx_relay->m_tx_inventory_known_filter.contains(hash)) {
peer.m_tx_relay->m_tx_inventory_to_send.insert(hash);
LOCK(tx_relay->m_tx_inventory_mutex);
if (!tx_relay->m_tx_inventory_known_filter.contains(hash)) {
tx_relay->m_tx_inventory_to_send.insert(hash);
}
};
}
@ -1966,11 +1976,11 @@ void PeerManagerImpl::ProcessGetBlockData(CNode& pfrom, Peer& peer, const CInv&
} else if (inv.IsMsgFilteredBlk()) {
bool sendMerkleBlock = false;
CMerkleBlock merkleBlock;
if (peer.m_tx_relay != nullptr) {
LOCK(peer.m_tx_relay->m_bloom_filter_mutex);
if (peer.m_tx_relay->m_bloom_filter) {
if (auto tx_relay = peer.GetTxRelay(); tx_relay != nullptr) {
LOCK(tx_relay->m_bloom_filter_mutex);
if (tx_relay->m_bloom_filter) {
sendMerkleBlock = true;
merkleBlock = CMerkleBlock(*pblock, *peer.m_tx_relay->m_bloom_filter);
merkleBlock = CMerkleBlock(*pblock, *tx_relay->m_bloom_filter);
}
}
if (sendMerkleBlock) {
@ -2053,13 +2063,15 @@ void PeerManagerImpl::ProcessGetData(CNode& pfrom, Peer& peer, const std::atomic
{
AssertLockNotHeld(cs_main);
auto tx_relay = peer.GetTxRelay();
std::deque<CInv>::iterator it = peer.m_getdata_requests.begin();
std::vector<CInv> vNotFound;
const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
const auto now{GetTime<std::chrono::seconds>()};
// Get last mempool request time
const auto mempool_req = peer.m_tx_relay != nullptr ? peer.m_tx_relay->m_last_mempool_req.load() : std::chrono::seconds::min();
const auto mempool_req = tx_relay != nullptr ? tx_relay->m_last_mempool_req.load() : std::chrono::seconds::min();
// Process as many TX items from the front of the getdata queue as
// possible, since they're common and it's efficient to batch process
@ -2072,7 +2084,7 @@ void PeerManagerImpl::ProcessGetData(CNode& pfrom, Peer& peer, const std::atomic
const CInv &inv = *it++;
if (peer.m_tx_relay == nullptr) {
if (tx_relay == nullptr) {
// Ignore GETDATA requests for transactions from blocks-only peers.
continue;
}
@ -2100,7 +2112,7 @@ void PeerManagerImpl::ProcessGetData(CNode& pfrom, Peer& peer, const std::atomic
}
for (const uint256& parent_txid : parent_ids_to_add) {
// Relaying a transaction with a recent but unconfirmed parent.
if (WITH_LOCK(peer.m_tx_relay->m_tx_inventory_mutex, return !peer.m_tx_relay->m_tx_inventory_known_filter.contains(parent_txid))) {
if (WITH_LOCK(tx_relay->m_tx_inventory_mutex, return !tx_relay->m_tx_inventory_known_filter.contains(parent_txid))) {
LOCK(cs_main);
State(pfrom.GetId())->m_recently_announced_invs.insert(parent_txid);
}
@ -2736,10 +2748,10 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
// set nodes not capable of serving the complete blockchain history as "limited nodes"
pfrom.m_limited_node = (!(nServices & NODE_NETWORK) && (nServices & NODE_NETWORK_LIMITED));
if (peer->m_tx_relay != nullptr) {
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
{
LOCK(peer->m_tx_relay->m_bloom_filter_mutex);
peer->m_tx_relay->m_relay_txs = fRelay; // set to true after we get the first filter* message
LOCK(tx_relay->m_bloom_filter_mutex);
tx_relay->m_relay_txs = fRelay; // set to true after we get the first filter* message
}
if (fRelay) pfrom.m_relays_txs = true;
}
@ -3069,7 +3081,7 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
// Reject tx INVs when the -blocksonly setting is enabled, or this is a
// block-relay-only peer
bool reject_tx_invs{m_ignore_incoming_txs || (peer->m_tx_relay == nullptr)};
bool reject_tx_invs{m_ignore_incoming_txs || (peer->GetTxRelay() == nullptr)};
// Allow peers with relay permission to send data other than blocks in blocks only mode
if (pfrom.HasPermission(NetPermissionFlags::Relay)) {
@ -3346,7 +3358,7 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
// Stop processing the transaction early if
// 1) We are in blocks only mode and peer has no relay permission
// 2) This peer is a block-relay-only peer
if ((m_ignore_incoming_txs && !pfrom.HasPermission(NetPermissionFlags::Relay)) || (peer->m_tx_relay == nullptr)) {
if ((m_ignore_incoming_txs && !pfrom.HasPermission(NetPermissionFlags::Relay)) || (peer->GetTxRelay() == nullptr)) {
LogPrint(BCLog::NET, "transaction sent in violation of protocol peer=%d\n", pfrom.GetId());
pfrom.fDisconnect = true;
return;
@ -3958,9 +3970,9 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
return;
}
if (peer->m_tx_relay != nullptr) {
LOCK(peer->m_tx_relay->m_tx_inventory_mutex);
peer->m_tx_relay->m_send_mempool = true;
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
LOCK(tx_relay->m_tx_inventory_mutex);
tx_relay->m_send_mempool = true;
}
return;
}
@ -4053,16 +4065,13 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
{
// There is no excuse for sending a too-large filter
Misbehaving(pfrom.GetId(), 100, "too-large bloom filter");
}
else if (peer->m_tx_relay != nullptr)
{
} else if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
{
LOCK(peer->m_tx_relay->m_bloom_filter_mutex);
peer->m_tx_relay->m_bloom_filter.reset(new CBloomFilter(filter));
peer->m_tx_relay->m_relay_txs = true;
LOCK(tx_relay->m_bloom_filter_mutex);
tx_relay->m_bloom_filter.reset(new CBloomFilter(filter));
tx_relay->m_relay_txs = true;
}
pfrom.m_bloom_filter_loaded = true;
pfrom.m_relays_txs = true;
}
return;
}
@ -4081,10 +4090,10 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
bool bad = false;
if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE) {
bad = true;
} else if (peer->m_tx_relay != nullptr) {
LOCK(peer->m_tx_relay->m_bloom_filter_mutex);
if (peer->m_tx_relay->m_bloom_filter) {
peer->m_tx_relay->m_bloom_filter->insert(vData);
} else if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
LOCK(tx_relay->m_bloom_filter_mutex);
if (tx_relay->m_bloom_filter) {
tx_relay->m_bloom_filter->insert(vData);
} else {
bad = true;
}
@ -4101,14 +4110,13 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
pfrom.fDisconnect = true;
return;
}
if (peer->m_tx_relay == nullptr) {
return;
}
auto tx_relay = peer->GetTxRelay();
if (!tx_relay) return;
{
LOCK(peer->m_tx_relay->m_bloom_filter_mutex);
peer->m_tx_relay->m_bloom_filter = nullptr;
peer->m_tx_relay->m_relay_txs = true;
LOCK(tx_relay->m_bloom_filter_mutex);
tx_relay->m_bloom_filter = nullptr;
tx_relay->m_relay_txs = true;
}
pfrom.m_bloom_filter_loaded = false;
pfrom.m_relays_txs = true;
@ -4119,8 +4127,8 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
CAmount newFeeFilter = 0;
vRecv >> newFeeFilter;
if (MoneyRange(newFeeFilter)) {
if (peer->m_tx_relay != nullptr) {
peer->m_tx_relay->m_fee_filter_received = newFeeFilter;
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
tx_relay->m_fee_filter_received = newFeeFilter;
}
LogPrint(BCLog::NET, "received: feefilter of %s from peer=%d\n", CFeeRate(newFeeFilter).ToString(), pfrom.GetId());
}
@ -4885,45 +4893,45 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
peer->m_blocks_for_inv_relay.clear();
}
if (peer->m_tx_relay != nullptr) {
LOCK(peer->m_tx_relay->m_tx_inventory_mutex);
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
LOCK(tx_relay->m_tx_inventory_mutex);
// Check whether periodic sends should happen
bool fSendTrickle = pto->HasPermission(NetPermissionFlags::NoBan);
if (peer->m_tx_relay->m_next_inv_send_time < current_time) {
if (tx_relay->m_next_inv_send_time < current_time) {
fSendTrickle = true;
if (pto->IsInboundConn()) {
peer->m_tx_relay->m_next_inv_send_time = NextInvToInbounds(current_time, INBOUND_INVENTORY_BROADCAST_INTERVAL);
tx_relay->m_next_inv_send_time = NextInvToInbounds(current_time, INBOUND_INVENTORY_BROADCAST_INTERVAL);
} else {
peer->m_tx_relay->m_next_inv_send_time = GetExponentialRand(current_time, OUTBOUND_INVENTORY_BROADCAST_INTERVAL);
tx_relay->m_next_inv_send_time = GetExponentialRand(current_time, OUTBOUND_INVENTORY_BROADCAST_INTERVAL);
}
}
// Time to send but the peer has requested we not relay transactions.
if (fSendTrickle) {
LOCK(peer->m_tx_relay->m_bloom_filter_mutex);
if (!peer->m_tx_relay->m_relay_txs) peer->m_tx_relay->m_tx_inventory_to_send.clear();
LOCK(tx_relay->m_bloom_filter_mutex);
if (!tx_relay->m_relay_txs) tx_relay->m_tx_inventory_to_send.clear();
}
// Respond to BIP35 mempool requests
if (fSendTrickle && peer->m_tx_relay->m_send_mempool) {
if (fSendTrickle && tx_relay->m_send_mempool) {
auto vtxinfo = m_mempool.infoAll();
peer->m_tx_relay->m_send_mempool = false;
const CFeeRate filterrate{peer->m_tx_relay->m_fee_filter_received.load()};
tx_relay->m_send_mempool = false;
const CFeeRate filterrate{tx_relay->m_fee_filter_received.load()};
LOCK(peer->m_tx_relay->m_bloom_filter_mutex);
LOCK(tx_relay->m_bloom_filter_mutex);
for (const auto& txinfo : vtxinfo) {
const uint256& hash = peer->m_wtxid_relay ? txinfo.tx->GetWitnessHash() : txinfo.tx->GetHash();
CInv inv(peer->m_wtxid_relay ? MSG_WTX : MSG_TX, hash);
peer->m_tx_relay->m_tx_inventory_to_send.erase(hash);
tx_relay->m_tx_inventory_to_send.erase(hash);
// Don't send transactions that peers will not put into their mempool
if (txinfo.fee < filterrate.GetFee(txinfo.vsize)) {
continue;
}
if (peer->m_tx_relay->m_bloom_filter) {
if (!peer->m_tx_relay->m_bloom_filter->IsRelevantAndUpdate(*txinfo.tx)) continue;
if (tx_relay->m_bloom_filter) {
if (!tx_relay->m_bloom_filter->IsRelevantAndUpdate(*txinfo.tx)) continue;
}
peer->m_tx_relay->m_tx_inventory_known_filter.insert(hash);
tx_relay->m_tx_inventory_known_filter.insert(hash);
// Responses to MEMPOOL requests bypass the m_recently_announced_invs filter.
vInv.push_back(inv);
if (vInv.size() == MAX_INV_SZ) {
@ -4931,18 +4939,18 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
vInv.clear();
}
}
peer->m_tx_relay->m_last_mempool_req = std::chrono::duration_cast<std::chrono::seconds>(current_time);
tx_relay->m_last_mempool_req = std::chrono::duration_cast<std::chrono::seconds>(current_time);
}
// Determine transactions to relay
if (fSendTrickle) {
// Produce a vector with all candidates for sending
std::vector<std::set<uint256>::iterator> vInvTx;
vInvTx.reserve(peer->m_tx_relay->m_tx_inventory_to_send.size());
for (std::set<uint256>::iterator it = peer->m_tx_relay->m_tx_inventory_to_send.begin(); it != peer->m_tx_relay->m_tx_inventory_to_send.end(); it++) {
vInvTx.reserve(tx_relay->m_tx_inventory_to_send.size());
for (std::set<uint256>::iterator it = tx_relay->m_tx_inventory_to_send.begin(); it != tx_relay->m_tx_inventory_to_send.end(); it++) {
vInvTx.push_back(it);
}
const CFeeRate filterrate{peer->m_tx_relay->m_fee_filter_received.load()};
const CFeeRate filterrate{tx_relay->m_fee_filter_received.load()};
// Topologically and fee-rate sort the inventory we send for privacy and priority reasons.
// A heap is used so that not all items need sorting if only a few are being sent.
CompareInvMempoolOrder compareInvMempoolOrder(&m_mempool, peer->m_wtxid_relay);
@ -4950,7 +4958,7 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
// No reason to drain out at many times the network's capacity,
// especially since we have many peers and some will draw much shorter delays.
unsigned int nRelayedTransactions = 0;
LOCK(peer->m_tx_relay->m_bloom_filter_mutex);
LOCK(tx_relay->m_bloom_filter_mutex);
while (!vInvTx.empty() && nRelayedTransactions < INVENTORY_BROADCAST_MAX) {
// Fetch the top element from the heap
std::pop_heap(vInvTx.begin(), vInvTx.end(), compareInvMempoolOrder);
@ -4959,9 +4967,9 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
uint256 hash = *it;
CInv inv(peer->m_wtxid_relay ? MSG_WTX : MSG_TX, hash);
// Remove it from the to-be-sent set
peer->m_tx_relay->m_tx_inventory_to_send.erase(it);
tx_relay->m_tx_inventory_to_send.erase(it);
// Check if not in the filter already
if (peer->m_tx_relay->m_tx_inventory_known_filter.contains(hash)) {
if (tx_relay->m_tx_inventory_known_filter.contains(hash)) {
continue;
}
// Not in the mempool anymore? don't bother sending it.
@ -4975,7 +4983,7 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
if (txinfo.fee < filterrate.GetFee(txinfo.vsize)) {
continue;
}
if (peer->m_tx_relay->m_bloom_filter && !peer->m_tx_relay->m_bloom_filter->IsRelevantAndUpdate(*txinfo.tx)) continue;
if (tx_relay->m_bloom_filter && !tx_relay->m_bloom_filter->IsRelevantAndUpdate(*txinfo.tx)) continue;
// Send
State(pto->GetId())->m_recently_announced_invs.insert(hash);
vInv.push_back(inv);
@ -5002,14 +5010,14 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::INV, vInv));
vInv.clear();
}
peer->m_tx_relay->m_tx_inventory_known_filter.insert(hash);
tx_relay->m_tx_inventory_known_filter.insert(hash);
if (hash != txid) {
// Insert txid into m_tx_inventory_known_filter, even for
// wtxidrelay peers. This prevents re-adding of
// unconfirmed parents to the recently_announced
// filter, when a child tx is requested. See
// ProcessGetData().
peer->m_tx_relay->m_tx_inventory_known_filter.insert(txid);
tx_relay->m_tx_inventory_known_filter.insert(txid);
}
}
}