Introduce AncestorHashesService (#18812)

Cargo.lock

@@ -4556,6 +4556,7 @@ dependencies = [
  "byteorder",
  "chrono",
  "crossbeam-channel",
+ "dashmap",
  "ed25519-dalek",
  "flate2",
  "fs_extra",

core/Cargo.toml

@@ -23,6 +23,7 @@ bs58 = "0.4.0"
 byteorder = "1.4.3"
 chrono = { version = "0.4.11", features = ["serde"] }
 crossbeam-channel = "0.5"
+dashmap = { version = "4.0.2", features = ["rayon", "raw-api"] }
 ed25519-dalek = "=1.0.1"
 fs_extra = "1.2.0"
 flate2 = "1.0"

core/src/ancestor_hashes_service.rs

@@ -0,0 +1,364 @@
+use crate::{
+    duplicate_repair_status::DeadSlotAncestorRequestStatus,
+    outstanding_requests::OutstandingRequests,
+    repair_response::{self},
+    repair_service::{DuplicateSlotsResetSender, RepairInfo, RepairStatsGroup},
+    result::{Error, Result},
+    serve_repair::AncestorHashesRepairType,
+};
+use dashmap::{mapref::entry::Entry::Occupied, DashMap};
+use solana_ledger::{blockstore::Blockstore, shred::SIZE_OF_NONCE};
+use solana_measure::measure::Measure;
+use solana_perf::{packet::limited_deserialize, recycler::Recycler};
+use solana_sdk::{
+    clock::{Slot, SLOT_MS},
+    timing::timestamp,
+};
+use solana_streamer::{
+    packet::Packets,
+    streamer::{self, PacketReceiver},
+};
+use std::{
+    net::UdpSocket,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        mpsc::channel,
+        {Arc, RwLock},
+    },
+    thread::{self, sleep, Builder, JoinHandle},
+    time::{Duration, Instant},
+};
+
+pub const MAX_ANCESTOR_HASHES_SLOT_REQUESTS_PER_SECOND: usize = 2;
+type OutstandingAncestorHashesRepairs = OutstandingRequests<AncestorHashesRepairType>;
+
+#[derive(Default)]
+pub struct AncestorHashesResponsesStats {
+    pub total_packets: usize,
+    pub dropped_packets: usize,
+    pub invalid_packets: usize,
+    pub processed: usize,
+}
+
+impl AncestorHashesResponsesStats {
+    fn report(&mut self) {
+        inc_new_counter_info!(
+            "ancestor_hashes_responses-total_packets",
+            self.total_packets
+        );
+        inc_new_counter_info!("ancestor_hashes_responses-processed", self.processed);
+        inc_new_counter_info!(
+            "ancestor_hashes_responses-dropped_packets",
+            self.dropped_packets
+        );
+        inc_new_counter_info!(
+            "ancestor_hashes_responses-invalid_packets",
+            self.invalid_packets
+        );
+        *self = AncestorHashesResponsesStats::default();
+    }
+}
+
+pub struct AncestorRepairRequestsStats {
+    pub ancestor_requests: RepairStatsGroup,
+    last_report: Instant,
+}
+
+impl Default for AncestorRepairRequestsStats {
+    fn default() -> Self {
+        AncestorRepairRequestsStats {
+            ancestor_requests: RepairStatsGroup::default(),
+            last_report: Instant::now(),
+        }
+    }
+}
+
+impl AncestorRepairRequestsStats {
+    fn report(&mut self) {
+        let slot_to_count: Vec<_> = self
+            .ancestor_requests
+            .slot_pubkeys
+            .iter()
+            .map(|(slot, slot_repairs)| {
+                (
+                    slot,
+                    slot_repairs
+                        .pubkey_repairs()
+                        .iter()
+                        .map(|(_key, count)| count)
+                        .sum::<u64>(),
+                )
+            })
+            .collect();
+
+        let repair_total = self.ancestor_requests.count;
+        if self.last_report.elapsed().as_secs() > 2 && repair_total > 0 {
+            info!("ancestor_repair_requests_stats: {:?}", slot_to_count);
+            datapoint_info!(
+                "ancestor-repair",
+                ("ancestor-repair-count", self.ancestor_requests.count, i64)
+            );
+
+            *self = AncestorRepairRequestsStats::default();
+        }
+    }
+}
+
+pub struct AncestorHashesService {
+    thread_hdls: Vec<JoinHandle<()>>,
+}
+
+impl AncestorHashesService {
+    pub fn new(
+        exit: Arc<AtomicBool>,
+        blockstore: Arc<Blockstore>,
+        ancestor_hashes_request_socket: Arc<UdpSocket>,
+        repair_info: RepairInfo,
+    ) -> Self {
+        let outstanding_requests: Arc<RwLock<OutstandingAncestorHashesRepairs>> =
+            Arc::new(RwLock::new(OutstandingAncestorHashesRepairs::default()));
+        let (response_sender, response_receiver) = channel();
+        let t_receiver = streamer::receiver(
+            ancestor_hashes_request_socket.clone(),
+            &exit,
+            response_sender,
+            Recycler::default(),
+            "ancestor_hashes_response_receiver",
+            1,
+            false,
+        );
+
+        // Listen for responses to our ancestor requests
+        let ancestor_hashes_request_statuses: Arc<DashMap<Slot, DeadSlotAncestorRequestStatus>> =
+            Arc::new(DashMap::new());
+        let t_ancestor_hashes_responses = Self::run_responses_listener(
+            ancestor_hashes_request_statuses.clone(),
+            response_receiver,
+            blockstore,
+            outstanding_requests.clone(),
+            exit.clone(),
+            repair_info.duplicate_slots_reset_sender.clone(),
+        );
+
+        // Generate ancestor requests for dead slots that are repairable
+        let t_ancestor_requests = Self::run_find_repairable_dead_slots(
+            ancestor_hashes_request_statuses,
+            ancestor_hashes_request_socket,
+            repair_info,
+            outstanding_requests,
+            exit,
+        );
+        let thread_hdls = vec![t_receiver, t_ancestor_hashes_responses, t_ancestor_requests];
+        Self { thread_hdls }
+    }
+
+    pub fn join(self) -> thread::Result<()> {
+        for thread_hdl in self.thread_hdls {
+            thread_hdl.join()?;
+        }
+        Ok(())
+    }
+
+    /// Listen for responses to our ancestors hashes repair requests
+    fn run_responses_listener(
+        ancestor_hashes_request_statuses: Arc<DashMap<Slot, DeadSlotAncestorRequestStatus>>,
+        response_receiver: PacketReceiver,
+        blockstore: Arc<Blockstore>,
+        outstanding_requests: Arc<RwLock<OutstandingAncestorHashesRepairs>>,
+        exit: Arc<AtomicBool>,
+        duplicate_slots_reset_sender: DuplicateSlotsResetSender,
+    ) -> JoinHandle<()> {
+        Builder::new()
+            .name("solana-ancestor-hashes-responses-service".to_string())
+            .spawn(move || {
+                let mut last_stats_report = Instant::now();
+                let mut stats = AncestorHashesResponsesStats::default();
+                let mut max_packets = 1024;
+                loop {
+                    let result = Self::process_new_responses(
+                        &ancestor_hashes_request_statuses,
+                        &response_receiver,
+                        &blockstore,
+                        &outstanding_requests,
+                        &mut stats,
+                        &mut max_packets,
+                        &duplicate_slots_reset_sender,
+                    );
+                    match result {
+                        Err(Error::RecvTimeout(_)) | Ok(_) => {}
+                        Err(err) => info!("ancestors hashes reponses listener error: {:?}", err),
+                    };
+                    if exit.load(Ordering::Relaxed) {
+                        return;
+                    }
+                    if last_stats_report.elapsed().as_secs() > 2 {
+                        stats.report();
+                        last_stats_report = Instant::now();
+                    }
+                }
+            })
+            .unwrap()
+    }
+
+    /// Process messages from the network
+    fn process_new_responses(
+        ancestor_hashes_request_statuses: &DashMap<Slot, DeadSlotAncestorRequestStatus>,
+        response_receiver: &PacketReceiver,
+        blockstore: &Blockstore,
+        outstanding_requests: &RwLock<OutstandingAncestorHashesRepairs>,
+        stats: &mut AncestorHashesResponsesStats,
+        max_packets: &mut usize,
+        duplicate_slots_reset_sender: &DuplicateSlotsResetSender,
+    ) -> Result<()> {
+        let timeout = Duration::new(1, 0);
+        let mut responses = vec![response_receiver.recv_timeout(timeout)?];
+        let mut total_packets = responses[0].packets.len();
+
+        let mut dropped_packets = 0;
+        while let Ok(more) = response_receiver.try_recv() {
+            total_packets += more.packets.len();
+            if total_packets < *max_packets {
+                // Drop the rest in the channel in case of DOS
+                responses.push(more);
+            } else {
+                dropped_packets += more.packets.len();
+            }
+        }
+
+        stats.dropped_packets += dropped_packets;
+        stats.total_packets += total_packets;
+
+        let mut time = Measure::start("ancestor_hashes::handle_packets");
+        for response in responses {
+            Self::handle_packets(
+                ancestor_hashes_request_statuses,
+                response,
+                stats,
+                outstanding_requests,
+                blockstore,
+                duplicate_slots_reset_sender,
+            );
+        }
+        time.stop();
+        if total_packets >= *max_packets {
+            if time.as_ms() > 1000 {
+                *max_packets = (*max_packets * 9) / 10;
+            } else {
+                *max_packets = (*max_packets * 10) / 9;
+            }
+        }
+        Ok(())
+    }
+
+    fn handle_packets(
+        ancestor_hashes_request_statuses: &DashMap<Slot, DeadSlotAncestorRequestStatus>,
+        packets: Packets,
+        stats: &mut AncestorHashesResponsesStats,
+        outstanding_requests: &RwLock<OutstandingAncestorHashesRepairs>,
+        blockstore: &Blockstore,
+        duplicate_slots_reset_sender: &DuplicateSlotsResetSender,
+    ) {
+        // iter over the packets
+        packets.packets.iter().for_each(|packet| {
+            let from_addr = packet.meta.addr();
+            if let Ok(ancestor_hashes_response) =
+                limited_deserialize(&packet.data[..packet.meta.size - SIZE_OF_NONCE])
+            {
+                // Verify the response
+                let request_slot = repair_response::nonce(&packet.data[..packet.meta.size])
+                    .and_then(|nonce| {
+                        outstanding_requests.write().unwrap().register_response(
+                            nonce,
+                            &ancestor_hashes_response,
+                            timestamp(),
+                            // If the response is valid, return the slot the request
+                            // was for
+                            |ancestor_hashes_request| ancestor_hashes_request.0,
+                        )
+                    });
+
+                if request_slot.is_none() {
+                    stats.invalid_packets += 1;
+                    return;
+                }
+
+                // If was a valid response, there must be a valid `request_slot`
+                let request_slot = request_slot.unwrap();
+                stats.processed += 1;
+
+                // Check if we can make any decisions.
+                if let Occupied(mut ancestor_hashes_status_ref) =
+                    ancestor_hashes_request_statuses.entry(request_slot)
+                {
+                    if let Some(decision) = ancestor_hashes_status_ref.get_mut().add_response(
+                        &from_addr,
+                        ancestor_hashes_response.into_slot_hashes(),
+                        blockstore,
+                    ) {
+                        let potential_slots_to_dump = {
+                            // TODO: In the case of DuplicateAncestorDecision::ContinueSearch
+                            // This means all the ancestors were mismatched, which
+                            // means the earliest mismatched ancestor has yet to be found.
+                            //
+                            // In the best case scenario, this means after ReplayStage dumps
+                            // the earliest known ancestor `A` here, and then repairs `A`,
+                            // because we may still have the incorrect version of some ancestor
+                            // of `A`, we will mark `A` as dead and then continue the search
+                            // protocol through another round of ancestor repairs.
+                            //
+                            // However this process is a bit slow, so in an ideal world, the
+                            // protocol could be extended to keep searching by making
+                            // another ancestor repair request from the earliest returned
+                            // ancestor from this search.
+                            decision
+                                .repair_status()
+                                .map(|status| status.correct_ancestors_to_repair.clone())
+                        };
+
+                        let mut did_send_replay_correct_ancestors = false;
+
+                        if let Some(potential_slots_to_dump) = potential_slots_to_dump {
+                            // Signal ReplayStage to dump the fork that is descended from
+                            // `earliest_mismatched_slot_to_dump`.
+                            if !potential_slots_to_dump.is_empty() {
+                                did_send_replay_correct_ancestors = true;
+                                let _ = duplicate_slots_reset_sender.send(potential_slots_to_dump);
+                            }
+                        }
+
+                        if !did_send_replay_correct_ancestors {
+                            // If nothing is going to be dumped + repaired, then we can remove
+                            // this slot from `ancestor_hashes_request_statuses` since the
+                            // dead flag won't be cleared from blockstore, so the
+                            // `ancestor_hashes_request_statuses.retain()` in
+                            // `Self::run_find_repairable_dead_slots()` won't clear
+                            // this slot
+                            ancestor_hashes_status_ref.remove();
+                        }
+                    }
+                }
+            }
+        });
+    }
+
+    fn run_find_repairable_dead_slots(
+        _ancestor_hashes_request_statuses: Arc<DashMap<Slot, DeadSlotAncestorRequestStatus>>,
+        _ancestor_hashes_request_socket: Arc<UdpSocket>,
+        _repair_info: RepairInfo,
+        _outstanding_requests: Arc<RwLock<OutstandingAncestorHashesRepairs>>,
+        exit: Arc<AtomicBool>,
+    ) -> JoinHandle<()> {
+        let mut repair_stats = AncestorRepairRequestsStats::default();
+
+        Builder::new()
+            .name("solana-find-repairable-dead-slots".to_string())
+            .spawn(move || loop {
+                if exit.load(Ordering::Relaxed) {
+                    return;
+                }
+                repair_stats.report();
+                sleep(Duration::from_millis(SLOT_MS));
+            })
+            .unwrap()
+    }
+}

core/src/lib.rs

@@ -8,6 +8,7 @@
 //!
 
 pub mod accounts_hash_verifier;
+pub mod ancestor_hashes_service;
 pub mod banking_stage;
 pub mod broadcast_stage;
 pub mod cache_block_meta_service;

core/src/outstanding_requests.rs

@@ -29,8 +29,15 @@ where
         nonce
     }
 
-    pub fn register_response(&mut self, nonce: u32, response: &S, now: u64) -> bool {
-        let (is_valid, should_delete) = self
+    pub fn register_response<R>(
+        &mut self,
+        nonce: u32,
+        response: &S,
+        now: u64,
+        // runs if the response was valid
+        success_fn: impl Fn(&T) -> R,
+    ) -> Option<R> {
+        let (response, should_delete) = self
             .requests
             .get_mut(&nonce)
             .map(|status| {
@@ -39,12 +46,15 @@ where
                     && status.request.verify_response(response)
                 {
                     status.num_expected_responses -= 1;
-                    (true, status.num_expected_responses == 0)
+                    (
+                        Some(success_fn(&status.request)),
+                        status.num_expected_responses == 0,
+                    )
                 } else {
-                    (false, true)
+                    (None, true)
                 }
             })
-            .unwrap_or((false, false));
+            .unwrap_or((None, false));
 
         if should_delete {
             self.requests
@@ -52,7 +62,7 @@ where
                 .expect("Delete must delete existing object");
         }
 
-        is_valid
+        response
     }
 }
 
@@ -103,7 +113,9 @@ pub(crate) mod tests {
             .unwrap()
             .expire_timestamp;
 
-        assert!(!outstanding_requests.register_response(nonce, &shred, expire_timestamp + 1));
+        assert!(outstanding_requests
+            .register_response(nonce, &shred, expire_timestamp + 1, |_| ())
+            .is_none());
         assert!(outstanding_requests.requests.get(&nonce).is_none());
     }
 
@@ -127,7 +139,9 @@ pub(crate) mod tests {
         assert!(num_expected_responses > 1);
 
         // Response that passes all checks should decrease num_expected_responses
-        assert!(outstanding_requests.register_response(nonce, &shred, expire_timestamp - 1));
+        assert!(outstanding_requests
+            .register_response(nonce, &shred, expire_timestamp - 1, |_| ())
+            .is_some());
         num_expected_responses -= 1;
         assert_eq!(
             outstanding_requests
@@ -139,8 +153,12 @@ pub(crate) mod tests {
         );
 
         // Response with incorrect nonce is ignored
-        assert!(!outstanding_requests.register_response(nonce + 1, &shred, expire_timestamp - 1));
-        assert!(!outstanding_requests.register_response(nonce + 1, &shred, expire_timestamp));
+        assert!(outstanding_requests
+            .register_response(nonce + 1, &shred, expire_timestamp - 1, |_| ())
+            .is_none());
+        assert!(outstanding_requests
+            .register_response(nonce + 1, &shred, expire_timestamp, |_| ())
+            .is_none());
         assert_eq!(
             outstanding_requests
                 .requests
@@ -152,7 +170,9 @@ pub(crate) mod tests {
 
         // Response with timestamp over limit should remove status, preventing late
         // responses from being accepted
-        assert!(!outstanding_requests.register_response(nonce, &shred, expire_timestamp));
+        assert!(outstanding_requests
+            .register_response(nonce, &shred, expire_timestamp, |_| ())
+            .is_none());
         assert!(outstanding_requests.requests.get(&nonce).is_none());
 
         // If number of outstanding requests hits zero, should also remove the entry
@@ -170,7 +190,9 @@ pub(crate) mod tests {
         assert!(num_expected_responses > 1);
         for _ in 0..num_expected_responses {
             assert!(outstanding_requests.requests.get(&nonce).is_some());
-            assert!(outstanding_requests.register_response(nonce, &shred, expire_timestamp - 1));
+            assert!(outstanding_requests
+                .register_response(nonce, &shred, expire_timestamp - 1, |_| ())
+                .is_some());
         }
         assert!(outstanding_requests.requests.get(&nonce).is_none());
     }

core/src/repair_service.rs

@@ -1,6 +1,7 @@
 //! The `repair_service` module implements the tools necessary to generate a thread which
 //! regularly finds missing shreds in the ledger and sends repair requests for those shreds
 use crate::{
+    ancestor_hashes_service::AncestorHashesService,
     cluster_info_vote_listener::VerifiedVoteReceiver,
     cluster_slots::ClusterSlots,
     duplicate_repair_status::DuplicateSlotRepairStatus,
@@ -33,8 +34,8 @@ use std::{
     time::{Duration, Instant},
 };
 
-pub type DuplicateSlotsResetSender = CrossbeamSender<Slot>;
-pub type DuplicateSlotsResetReceiver = CrossbeamReceiver<Slot>;
+pub type DuplicateSlotsResetSender = CrossbeamSender<Vec<(Slot, Hash)>>;
+pub type DuplicateSlotsResetReceiver = CrossbeamReceiver<Vec<(Slot, Hash)>>;
 pub type ConfirmedSlotsSender = CrossbeamSender<Vec<Slot>>;
 pub type ConfirmedSlotsReceiver = CrossbeamReceiver<Vec<Slot>>;
 pub type OutstandingShredRepairs = OutstandingRequests<ShredRepairType>;
@@ -46,6 +47,12 @@ pub struct SlotRepairs {
     pubkey_repairs: HashMap<Pubkey, u64>,
 }
 
+impl SlotRepairs {
+    pub fn pubkey_repairs(&self) -> &HashMap<Pubkey, u64> {
+        &self.pubkey_repairs
+    }
+}
+
 #[derive(Default, Debug)]
 pub struct RepairStatsGroup {
     pub count: u64,
@@ -111,8 +118,11 @@ pub const MAX_DUPLICATE_WAIT_MS: usize = 10_000;
 pub const REPAIR_MS: u64 = 100;
 pub const MAX_ORPHANS: usize = 5;
 
+#[derive(Clone)]
 pub struct RepairInfo {
     pub bank_forks: Arc<RwLock<BankForks>>,
+    pub cluster_info: Arc<ClusterInfo>,
+    pub cluster_slots: Arc<ClusterSlots>,
     pub epoch_schedule: EpochSchedule,
     pub duplicate_slots_reset_sender: DuplicateSlotsResetSender,
     pub repair_validators: Option<HashSet<Pubkey>>,
@@ -134,6 +144,7 @@ impl Default for RepairSlotRange {
 
 pub struct RepairService {
     t_repair: JoinHandle<()>,
+    ancestor_hashes_service: AncestorHashesService,
 }
 
 impl RepairService {
@@ -141,44 +152,54 @@ impl RepairService {
         blockstore: Arc<Blockstore>,
         exit: Arc<AtomicBool>,
         repair_socket: Arc<UdpSocket>,
-        cluster_info: Arc<ClusterInfo>,
         repair_info: RepairInfo,
-        cluster_slots: Arc<ClusterSlots>,
         verified_vote_receiver: VerifiedVoteReceiver,
         outstanding_requests: Arc<RwLock<OutstandingShredRepairs>>,
     ) -> Self {
-        let t_repair = Builder::new()
-            .name("solana-repair-service".to_string())
-            .spawn(move || {
-                Self::run(
-                    &blockstore,
-                    &exit,
-                    &repair_socket,
-                    cluster_info,
-                    repair_info,
-                    &cluster_slots,
-                    verified_vote_receiver,
-                    &outstanding_requests,
-                )
-            })
-            .unwrap();
+        let t_repair = {
+            let blockstore = blockstore.clone();
+            let exit = exit.clone();
+            let repair_info = repair_info.clone();
+            Builder::new()
+                .name("solana-repair-service".to_string())
+                .spawn(move || {
+                    Self::run(
+                        &blockstore,
+                        &exit,
+                        &repair_socket,
+                        repair_info,
+                        verified_vote_receiver,
+                        &outstanding_requests,
+                    )
+                })
+                .unwrap()
+        };
 
-        RepairService { t_repair }
+        let ancestor_hashes_request_socket = Arc::new(UdpSocket::bind("0.0.0.0:0").unwrap());
+        let ancestor_hashes_service = AncestorHashesService::new(
+            exit,
+            blockstore,
+            ancestor_hashes_request_socket,
+            repair_info,
+        );
+
+        RepairService {
+            t_repair,
+            ancestor_hashes_service,
+        }
     }
 
     fn run(
         blockstore: &Blockstore,
         exit: &AtomicBool,
         repair_socket: &UdpSocket,
-        cluster_info: Arc<ClusterInfo>,
         repair_info: RepairInfo,
-        cluster_slots: &ClusterSlots,
         verified_vote_receiver: VerifiedVoteReceiver,
         outstanding_requests: &RwLock<OutstandingShredRepairs>,
     ) {
         let mut repair_weight = RepairWeight::new(repair_info.bank_forks.read().unwrap().root());
-        let serve_repair = ServeRepair::new(cluster_info.clone());
-        let id = cluster_info.id();
+        let serve_repair = ServeRepair::new(repair_info.cluster_info.clone());
+        let id = repair_info.cluster_info.id();
         let mut repair_stats = RepairStats::default();
         let mut repair_timing = RepairTiming::default();
         let mut last_stats = Instant::now();
@@ -243,7 +264,7 @@ impl RepairService {
             let mut outstanding_requests = outstanding_requests.write().unwrap();
             repairs.into_iter().for_each(|repair_request| {
                 if let Ok((to, req)) = serve_repair.repair_request(
-                    cluster_slots,
+                    &repair_info.cluster_slots,
                     repair_request,
                     &mut peers_cache,
                     &mut repair_stats,
@@ -389,12 +410,12 @@ impl RepairService {
         repairs: &mut Vec<ShredRepairType>,
         max_repairs: usize,
         slot: Slot,
-        ancestor_hashes_request_statuses: &impl Contains<'a, Slot>,
+        duplicate_slot_repair_statuses: &impl Contains<'a, Slot>,
     ) {
         let mut pending_slots = vec![slot];
         while repairs.len() < max_repairs && !pending_slots.is_empty() {
             let slot = pending_slots.pop().unwrap();
-            if ancestor_hashes_request_statuses.contains(&slot) {
+            if duplicate_slot_repair_statuses.contains(&slot) {
                 // These are repaired through a different path
                 continue;
             }
@@ -554,7 +575,8 @@ impl RepairService {
     }
 
     pub fn join(self) -> thread::Result<()> {
-        self.t_repair.join()
+        self.t_repair.join()?;
+        self.ancestor_hashes_service.join()
     }
 }
 
@@ -875,7 +897,7 @@ mod test {
         let cluster_slots = ClusterSlots::default();
         let serve_repair =
             ServeRepair::new(Arc::new(new_test_cluster_info(Node::new_localhost().info)));
-        let mut ancestor_hashes_request_statuses = HashMap::new();
+        let mut duplicate_slot_repair_statuses = HashMap::new();
         let dead_slot = 9;
         let receive_socket = &UdpSocket::bind("0.0.0.0:0").unwrap();
         let duplicate_status = DuplicateSlotRepairStatus {
@@ -891,12 +913,12 @@ mod test {
             .insert_shreds(shreds[..shreds.len() - 1].to_vec(), None, false)
             .unwrap();
 
-        ancestor_hashes_request_statuses.insert(dead_slot, duplicate_status);
+        duplicate_slot_repair_statuses.insert(dead_slot, duplicate_status);
 
         // There is no repair_addr, so should not get filtered because the timeout
         // `std::u64::MAX` has not expired
         RepairService::generate_and_send_duplicate_repairs(
-            &mut ancestor_hashes_request_statuses,
+            &mut duplicate_slot_repair_statuses,
             &cluster_slots,
             &blockstore,
             &serve_repair,
@@ -905,23 +927,23 @@ mod test {
             &None,
             &RwLock::new(OutstandingRequests::default()),
         );
-        assert!(ancestor_hashes_request_statuses
+        assert!(duplicate_slot_repair_statuses
             .get(&dead_slot)
             .unwrap()
             .repair_pubkey_and_addr
             .is_none());
-        assert!(ancestor_hashes_request_statuses.get(&dead_slot).is_some());
+        assert!(duplicate_slot_repair_statuses.get(&dead_slot).is_some());
 
         // Give the slot a repair address
-        ancestor_hashes_request_statuses
+        duplicate_slot_repair_statuses
             .get_mut(&dead_slot)
             .unwrap()
             .repair_pubkey_and_addr =
             Some((Pubkey::default(), receive_socket.local_addr().unwrap()));
 
-        // Slot is not yet full, should not get filtered from `ancestor_hashes_request_statuses`
+        // Slot is not yet full, should not get filtered from `duplicate_slot_repair_statuses`
         RepairService::generate_and_send_duplicate_repairs(
-            &mut ancestor_hashes_request_statuses,
+            &mut duplicate_slot_repair_statuses,
             &cluster_slots,
             &blockstore,
             &serve_repair,
@@ -930,16 +952,16 @@ mod test {
             &None,
             &RwLock::new(OutstandingRequests::default()),
         );
-        assert_eq!(ancestor_hashes_request_statuses.len(), 1);
-        assert!(ancestor_hashes_request_statuses.get(&dead_slot).is_some());
+        assert_eq!(duplicate_slot_repair_statuses.len(), 1);
+        assert!(duplicate_slot_repair_statuses.get(&dead_slot).is_some());
 
         // Insert rest of shreds. Slot is full, should get filtered from
-        // `ancestor_hashes_request_statuses`
+        // `duplicate_slot_repair_statuses`
         blockstore
             .insert_shreds(vec![shreds.pop().unwrap()], None, false)
             .unwrap();
         RepairService::generate_and_send_duplicate_repairs(
-            &mut ancestor_hashes_request_statuses,
+            &mut duplicate_slot_repair_statuses,
             &cluster_slots,
             &blockstore,
             &serve_repair,
@@ -948,7 +970,7 @@ mod test {
             &None,
             &RwLock::new(OutstandingRequests::default()),
         );
-        assert!(ancestor_hashes_request_statuses.is_empty());
+        assert!(duplicate_slot_repair_statuses.is_empty());
     }
 
     #[test]

core/src/retransmit_stage.rs

@@ -574,10 +574,11 @@ impl RetransmitStage {
             epoch_schedule,
             duplicate_slots_reset_sender,
             repair_validators,
+            cluster_info: cluster_info.clone(),
+            cluster_slots,
         };
         let window_service = WindowService::new(
             blockstore,
-            cluster_info.clone(),
             verified_receiver,
             retransmit_sender,
             repair_socket,
@@ -599,7 +600,6 @@ impl RetransmitStage {
                 );
                 rv && is_connected
             },
-            cluster_slots,
             verified_vote_receiver,
             completed_data_sets_sender,
             duplicate_slots_sender,

core/src/serve_repair.rs

@@ -95,20 +95,25 @@ impl RequestResponse for ShredRepairType {
     }
 }
 
-pub struct AncestorHashesRepair(Slot);
+pub struct AncestorHashesRepairType(pub Slot);
+impl AncestorHashesRepairType {
+    pub fn slot(&self) -> Slot {
+        self.0
+    }
+}
+
 #[derive(Serialize, Deserialize)]
 pub enum AncestorHashesResponseVersion {
     Current(Vec<SlotHash>),
 }
 impl AncestorHashesResponseVersion {
-    #[cfg(test)]
-    fn into_slot_hashes(self) -> Vec<SlotHash> {
+    pub fn into_slot_hashes(self) -> Vec<SlotHash> {
         match self {
             AncestorHashesResponseVersion::Current(slot_hashes) => slot_hashes,
         }
     }
 
-    fn slot_hashes(&self) -> &[SlotHash] {
+    pub fn slot_hashes(&self) -> &[SlotHash] {
         match self {
             AncestorHashesResponseVersion::Current(slot_hashes) => slot_hashes,
         }
@@ -121,7 +126,7 @@ impl AncestorHashesResponseVersion {
     }
 }
 
-impl RequestResponse for AncestorHashesRepair {
+impl RequestResponse for AncestorHashesRepairType {
     type Response = AncestorHashesResponseVersion;
     fn num_expected_responses(&self) -> u32 {
         1
@@ -474,6 +479,16 @@ impl ServeRepair {
         Ok(out)
     }
 
+    pub fn ancestor_repair_request_bytes(
+        &self,
+        request_slot: Slot,
+        nonce: Nonce,
+    ) -> Result<Vec<u8>> {
+        let repair_request = RepairProtocol::AncestorHashes(self.my_info(), request_slot, nonce);
+        let out = serialize(&repair_request)?;
+        Ok(out)
+    }
+
     pub(crate) fn repair_request(
         &self,
         cluster_slots: &ClusterSlots,
@@ -1346,7 +1361,7 @@ mod tests {
     #[test]
     fn test_verify_ancestor_response() {
         let request_slot = MAX_ANCESTOR_RESPONSES as Slot;
-        let repair = AncestorHashesRepair(request_slot);
+        let repair = AncestorHashesRepairType(request_slot);
         let mut response: Vec<SlotHash> = (0..request_slot)
             .into_iter()
             .map(|slot| (slot, Hash::new_unique()))

core/src/window_service.rs

@@ -3,7 +3,6 @@
 //!
 use crate::{
     cluster_info_vote_listener::VerifiedVoteReceiver,
-    cluster_slots::ClusterSlots,
     completed_data_sets_service::CompletedDataSetsSender,
     outstanding_requests::OutstandingRequests,
     repair_response,
@@ -131,11 +130,14 @@ fn verify_repair(
     repair_meta
         .as_ref()
         .map(|repair_meta| {
-            outstanding_requests.register_response(
-                repair_meta.nonce,
-                shred,
-                solana_sdk::timing::timestamp(),
-            )
+            outstanding_requests
+                .register_response(
+                    repair_meta.nonce,
+                    shred,
+                    solana_sdk::timing::timestamp(),
+                    |_| (),
+                )
+                .is_some()
         })
         .unwrap_or(true)
 }
@@ -329,7 +331,6 @@ impl WindowService {
     #[allow(clippy::too_many_arguments)]
     pub fn new<F>(
         blockstore: Arc<Blockstore>,
-        cluster_info: Arc<ClusterInfo>,
         verified_receiver: CrossbeamReceiver<Vec<Packets>>,
         retransmit: PacketSender,
         repair_socket: Arc<UdpSocket>,
@@ -337,7 +338,6 @@ impl WindowService {
         repair_info: RepairInfo,
         leader_schedule_cache: &Arc<LeaderScheduleCache>,
         shred_filter: F,
-        cluster_slots: Arc<ClusterSlots>,
         verified_vote_receiver: VerifiedVoteReceiver,
         completed_data_sets_sender: CompletedDataSetsSender,
         duplicate_slots_sender: DuplicateSlotSender,
@@ -352,14 +352,14 @@ impl WindowService {
             Arc::new(RwLock::new(OutstandingRequests::default()));
 
         let bank_forks = repair_info.bank_forks.clone();
+        let cluster_info = repair_info.cluster_info.clone();
+        let id = cluster_info.id();
 
         let repair_service = RepairService::new(
             blockstore.clone(),
             exit.clone(),
             repair_socket,
-            cluster_info.clone(),
             repair_info,
-            cluster_slots,
             verified_vote_receiver,
             outstanding_requests.clone(),
         );
@@ -368,7 +368,7 @@ impl WindowService {
         let (duplicate_sender, duplicate_receiver) = unbounded();
 
         let t_check_duplicate = Self::start_check_duplicate_thread(
-            cluster_info.clone(),
+            cluster_info,
             exit.clone(),
             blockstore.clone(),
             duplicate_receiver,
@@ -386,7 +386,7 @@ impl WindowService {
         );
 
         let t_window = Self::start_recv_window_thread(
-            cluster_info.id(),
+            id,
             exit,
             &blockstore,
             insert_sender,