Skip to content

Prevent racey access to indexer state #6886

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 5 commits into from
Mar 10, 2025
Merged

Prevent racey access to indexer state #6886

Show file tree
Hide file tree
Changes from 4 commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
3969958
Protect access to strategies collection
eddyashton Mar 6, 2025
a57bfef
Lock in derived class
eddyashton Mar 6, 2025
9c27e03
Lock max_requested_seqno in LazyStrategy
eddyashton Mar 6, 2025
0c1b8f5
Merge branch 'main' into tsan_indexer
achamayou Mar 7, 2025
3789b44
Hmm
eddyashton Mar 10, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions include/ccf/indexing/indexer_interface.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@

#include "ccf/indexing/strategy.h"
#include "ccf/node_subsystem_interface.h"
#include "ccf/pal/locking.h"

#include <map>
#include <memory>
Expand All @@ -19,6 +20,7 @@ namespace ccf::indexing
class IndexingStrategies : public ccf::AbstractNodeSubSystem
{
protected:
ccf::pal::Mutex lock;
std::set<StrategyPtr> strategies;

public:
Expand All @@ -36,11 +38,13 @@ namespace ccf::indexing
throw std::logic_error("Tried to install null strategy");
}

std::lock_guard<ccf::pal::Mutex> guard(lock);
return strategies.insert(strategy).second;
}

void uninstall_strategy(const StrategyPtr& strategy)
{
std::lock_guard<ccf::pal::Mutex> guard(lock);
if (strategy == nullptr || strategies.find(strategy) == strategies.end())
{
throw std::logic_error("Strategy doesn't exist");
Expand All @@ -51,6 +55,7 @@ namespace ccf::indexing

nlohmann::json describe() const
{
std::lock_guard<ccf::pal::Mutex> guard(lock);
auto j = nlohmann::json::array();

for (const auto& strategy : strategies)
Expand Down
4 changes: 4 additions & 0 deletions include/ccf/indexing/strategy.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
#pragma once

#include "ccf/kv/read_only_store.h"
#include "ccf/pal/locking.h"
#include "ccf/tx_id.h"

#include <optional>
Expand Down Expand Up @@ -68,6 +69,7 @@ namespace ccf::indexing
class LazyStrategy : public Base
{
protected:
ccf::pal::Mutex lock;
ccf::SeqNo max_requested_seqno = 0;

public:
Expand All @@ -78,6 +80,7 @@ namespace ccf::indexing
const auto base = Base::next_requested();
if (base.has_value())
{
std::lock_guard<ccf::pal::Mutex> guard(lock);
if (*base <= max_requested_seqno)
{
return base;
Expand All @@ -89,6 +92,7 @@ namespace ccf::indexing

void extend_index_to(ccf::TxID to_txid)
{
std::lock_guard<ccf::pal::Mutex> guard(lock);
if (to_txid.seqno > max_requested_seqno)
{
max_requested_seqno = to_txid.seqno;
Expand Down
3 changes: 3 additions & 0 deletions src/indexing/indexer.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,9 @@ namespace ccf::indexing
update_commit(newly_committed);

std::optional<ccf::SeqNo> min_requested = std::nullopt;

std::lock_guard<ccf::pal::Mutex> guard(lock);

for (auto& strategy : strategies)
{
strategy->tick();
Expand Down
Loading