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net: move state dependent peer services flags

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No behavior change. Just an intermediate refactoring.

By relocating the peer desirable services flags into the peer
manager, we allow the connections acceptance process to handle
post-IBD potential stalling scenarios.

In the follow-up commit(s), the desirable service flags will be
dynamically adjusted to detect post-IBD stalling scenarios (such
as a +48-hour inactive node that must prefer full node connections
instead of limited peer connections because they cannot provide
historical blocks). Additionally, this encapsulation enable us
to customize the connections decision-making process based on
new user's configurations in the future.
This commit is contained in:
furszy 2023-12-19 09:50:37 -03:00
parent f9ac96b8d6
commit 9f36e591c5
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GPG key ID: 5DD23CCC686AA623
7 changed files with 50 additions and 44 deletions
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16
src/net_processing.cpp
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@ -499,6 +499,7 @@ public:
/** Implement NetEventsInterface */
void InitializeNode(CNode& node, ServiceFlags our_services) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
void FinalizeNode(const CNode& node) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, !m_headers_presync_mutex);
bool HasAllDesirableServiceFlags(ServiceFlags services) const override;
bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, !m_recent_confirmed_transactions_mutex, !m_most_recent_block_mutex, !m_headers_presync_mutex, g_msgproc_mutex);
bool SendMessages(CNode* pto) override
@ -523,6 +524,7 @@ public:
const std::chrono::microseconds time_received, const std::atomic<bool>& interruptMsgProc) override
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, !m_recent_confirmed_transactions_mutex, !m_most_recent_block_mutex, !m_headers_presync_mutex, g_msgproc_mutex);
void UpdateLastBlockAnnounceTime(NodeId node, int64_t time_in_seconds) override;
ServiceFlags GetDesirableServiceFlags(ServiceFlags services) const override;
private:
/** Consider evicting an outbound peer based on the amount of time they've been behind our tip */
@ -1668,6 +1670,20 @@ void PeerManagerImpl::FinalizeNode(const CNode& node)
LogPrint(BCLog::NET, "Cleared nodestate for peer=%d\n", nodeid);
}
bool PeerManagerImpl::HasAllDesirableServiceFlags(ServiceFlags services) const
{
// Shortcut for (services & GetDesirableServiceFlags(services)) == GetDesirableServiceFlags(services)
return !(GetDesirableServiceFlags(services) & (~services));
}
ServiceFlags PeerManagerImpl::GetDesirableServiceFlags(ServiceFlags services) const
{
if (services & NODE_NETWORK_LIMITED && GetServicesFlagsIBDCache()) {
return ServiceFlags(NODE_NETWORK_LIMITED | NODE_WITNESS);
}
return ServiceFlags(NODE_NETWORK | NODE_WITNESS);
}
PeerRef PeerManagerImpl::GetPeerRef(NodeId id) const
{
LOCK(m_peer_mutex);