Add option for repairing only from trusted validators (#11752)

Co-authored-by: Carl <carl@solana.com>

core/src/repair_service.rs

@@ -18,7 +18,7 @@ use solana_measure::measure::Measure;
 use solana_runtime::{bank::Bank, bank_forks::BankForks, commitment::VOTE_THRESHOLD_SIZE};
 use solana_sdk::{clock::Slot, epoch_schedule::EpochSchedule, pubkey::Pubkey, timing::timestamp};
 use std::{
-    collections::HashMap,
+    collections::{HashMap, HashSet},
     iter::Iterator,
     net::SocketAddr,
     net::UdpSocket,
@@ -108,6 +108,7 @@ pub struct RepairInfo {
     pub bank_forks: Arc<RwLock<BankForks>>,
     pub epoch_schedule: EpochSchedule,
     pub duplicate_slots_reset_sender: DuplicateSlotsResetSender,
+    pub repair_validators: Option<HashSet<Pubkey>>,
 }
 
 pub struct RepairSlotRange {
@@ -234,6 +235,7 @@ impl RepairService {
                     blockstore,
                     &serve_repair,
                     &repair_info.duplicate_slots_reset_sender,
+                    &repair_info.repair_validators,
                 );
                 Self::generate_and_send_duplicate_repairs(
                     &mut duplicate_slot_repair_statuses,
@@ -242,6 +244,7 @@ impl RepairService {
                     &serve_repair,
                     &mut repair_stats,
                     &repair_socket,
+                    &repair_info.repair_validators,
                 );*/
 
                 repair_weight.get_best_weighted_repairs(
@@ -263,6 +266,7 @@ impl RepairService {
                     repair_request,
                     &mut cache,
                     &mut repair_stats,
+                    &repair_info.repair_validators,
                 ) {
                     repair_socket.send_to(&req, to).unwrap_or_else(|e| {
                         info!("{} repair req send_to({}) error {:?}", id, to, e);
@@ -444,9 +448,16 @@ impl RepairService {
         serve_repair: &ServeRepair,
         repair_stats: &mut RepairStats,
         repair_socket: &UdpSocket,
+        repair_validators: &Option<HashSet<Pubkey>>,
     ) {
         duplicate_slot_repair_statuses.retain(|slot, status| {
-            Self::update_duplicate_slot_repair_addr(*slot, status, cluster_slots, serve_repair);
+            Self::update_duplicate_slot_repair_addr(
+                *slot,
+                status,
+                cluster_slots,
+                serve_repair,
+                repair_validators,
+            );
             if let Some((repair_pubkey, repair_addr)) = status.repair_pubkey_and_addr {
                 let repairs = Self::generate_duplicate_repairs_for_slot(&blockstore, *slot);
 
@@ -499,13 +510,17 @@ impl RepairService {
         status: &mut DuplicateSlotRepairStatus,
         cluster_slots: &ClusterSlots,
         serve_repair: &ServeRepair,
+        repair_validators: &Option<HashSet<Pubkey>>,
     ) {
         let now = timestamp();
         if status.repair_pubkey_and_addr.is_none()
             || now.saturating_sub(status.start) >= MAX_DUPLICATE_WAIT_MS as u64
         {
-            let repair_pubkey_and_addr =
-                serve_repair.repair_request_duplicate_compute_best_peer(slot, cluster_slots);
+            let repair_pubkey_and_addr = serve_repair.repair_request_duplicate_compute_best_peer(
+                slot,
+                cluster_slots,
+                repair_validators,
+            );
             status.repair_pubkey_and_addr = repair_pubkey_and_addr.ok();
             status.start = timestamp();
         }
@@ -520,6 +535,7 @@ impl RepairService {
         blockstore: &Blockstore,
         serve_repair: &ServeRepair,
         duplicate_slots_reset_sender: &DuplicateSlotsResetSender,
+        repair_validators: &Option<HashSet<Pubkey>>,
     ) {
         for slot in new_duplicate_slots {
             warn!(
@@ -545,7 +561,7 @@ impl RepairService {
             // Mark this slot as special repair, try to download from single
             // validator to avoid corruption
             let repair_pubkey_and_addr = serve_repair
-                .repair_request_duplicate_compute_best_peer(*slot, cluster_slots)
+                .repair_request_duplicate_compute_best_peer(*slot, cluster_slots, repair_validators)
                 .ok();
             let new_duplicate_slot_repair_status = DuplicateSlotRepairStatus {
                 start: timestamp(),
@@ -953,6 +969,7 @@ mod test {
             &serve_repair,
             &mut RepairStats::default(),
             &UdpSocket::bind("0.0.0.0:0").unwrap(),
+            &None,
         );
         assert!(duplicate_slot_repair_statuses
             .get(&dead_slot)
@@ -976,6 +993,7 @@ mod test {
             &serve_repair,
             &mut RepairStats::default(),
             &UdpSocket::bind("0.0.0.0:0").unwrap(),
+            &None,
         );
         assert_eq!(duplicate_slot_repair_statuses.len(), 1);
         assert!(duplicate_slot_repair_statuses.get(&dead_slot).is_some());
@@ -992,6 +1010,7 @@ mod test {
             &serve_repair,
             &mut RepairStats::default(),
             &UdpSocket::bind("0.0.0.0:0").unwrap(),
+            &None,
         );
         assert!(duplicate_slot_repair_statuses.is_empty());
     }
@@ -1026,6 +1045,7 @@ mod test {
             &mut duplicate_status,
             &cluster_slots,
             &serve_repair,
+            &None,
         );
         assert_eq!(duplicate_status.repair_pubkey_and_addr, dummy_addr);
 
@@ -1039,6 +1059,7 @@ mod test {
             &mut duplicate_status,
             &cluster_slots,
             &serve_repair,
+            &None,
         );
         assert!(duplicate_status.repair_pubkey_and_addr.is_some());
 
@@ -1052,6 +1073,7 @@ mod test {
             &mut duplicate_status,
             &cluster_slots,
             &serve_repair,
+            &None,
         );
         assert_ne!(duplicate_status.repair_pubkey_and_addr, dummy_addr);
     }
@@ -1108,6 +1130,7 @@ mod test {
             &blockstore,
             &serve_repair,
             &reset_sender,
+            &None,
         );
 
         // Blockstore should have been cleared

core/src/retransmit_stage.rs

@@ -28,6 +28,7 @@ use solana_sdk::timing::timestamp;
 use solana_streamer::streamer::PacketReceiver;
 use std::{
     cmp,
+    collections::hash_set::HashSet,
     collections::{BTreeMap, HashMap},
     net::UdpSocket,
     sync::atomic::{AtomicBool, AtomicU64, Ordering},
@@ -417,6 +418,7 @@ impl RetransmitStage {
         cluster_slots: Arc<ClusterSlots>,
         duplicate_slots_reset_sender: DuplicateSlotsResetSender,
         verified_vote_receiver: VerifiedVoteReceiver,
+        repair_validators: Option<HashSet<Pubkey>>,
     ) -> Self {
         let (retransmit_sender, retransmit_receiver) = channel();
 
@@ -442,6 +444,7 @@ impl RetransmitStage {
             bank_forks,
             epoch_schedule,
             duplicate_slots_reset_sender,
+            repair_validators,
         };
         let window_service = WindowService::new(
             blockstore,

core/src/serve_repair.rs

@@ -21,7 +21,7 @@ use solana_sdk::{
 };
 use solana_streamer::streamer::{PacketReceiver, PacketSender};
 use std::{
-    collections::HashMap,
+    collections::{HashMap, HashSet},
     net::SocketAddr,
     sync::atomic::{AtomicBool, Ordering},
     sync::{Arc, RwLock},
@@ -382,12 +382,13 @@ impl ServeRepair {
         repair_request: RepairType,
         cache: &mut RepairCache,
         repair_stats: &mut RepairStats,
+        repair_validators: &Option<HashSet<Pubkey>>,
     ) -> Result<(SocketAddr, Vec<u8>)> {
         // find a peer that appears to be accepting replication and has the desired slot, as indicated
         // by a valid tvu port location
         let slot = repair_request.slot();
         if cache.get(&slot).is_none() {
-            let repair_peers: Vec<_> = self.cluster_info.repair_peers(slot);
+            let repair_peers = self.repair_peers(&repair_validators, slot);
             if repair_peers.is_empty() {
                 return Err(ClusterInfoError::NoPeers.into());
             }
@@ -411,8 +412,9 @@ impl ServeRepair {
         &self,
         slot: Slot,
         cluster_slots: &ClusterSlots,
+        repair_validators: &Option<HashSet<Pubkey>>,
     ) -> Result<(Pubkey, SocketAddr)> {
-        let repair_peers: Vec<_> = self.cluster_info.repair_peers(slot);
+        let repair_peers: Vec<_> = self.repair_peers(repair_validators, slot);
         if repair_peers.is_empty() {
             return Err(ClusterInfoError::NoPeers.into());
         }
@@ -448,6 +450,27 @@ impl ServeRepair {
         }
     }
 
+    fn repair_peers(
+        &self,
+        repair_validators: &Option<HashSet<Pubkey>>,
+        slot: Slot,
+    ) -> Vec<ContactInfo> {
+        if let Some(repair_validators) = repair_validators {
+            repair_validators
+                .iter()
+                .filter_map(|key| {
+                    if *key != self.my_info.id {
+                        self.cluster_info.lookup_contact_info(key, |ci| ci.clone())
+                    } else {
+                        None
+                    }
+                })
+                .collect()
+        } else {
+            self.cluster_info.repair_peers(slot)
+        }
+    }
+
     fn run_window_request(
         recycler: &PacketsRecycler,
         from: &ContactInfo,
@@ -733,6 +756,7 @@ mod tests {
             RepairType::Shred(0, 0),
             &mut HashMap::new(),
             &mut RepairStats::default(),
+            &None,
         );
         assert_matches!(rv, Err(Error::ClusterInfoError(ClusterInfoError::NoPeers)));
 
@@ -759,6 +783,7 @@ mod tests {
                 RepairType::Shred(0, 0),
                 &mut HashMap::new(),
                 &mut RepairStats::default(),
+                &None,
             )
             .unwrap();
         assert_eq!(nxt.serve_repair, serve_repair_addr);
@@ -791,6 +816,7 @@ mod tests {
                     RepairType::Shred(0, 0),
                     &mut HashMap::new(),
                     &mut RepairStats::default(),
+                    &None,
                 )
                 .unwrap();
             if rv.0 == serve_repair_addr {
@@ -937,4 +963,71 @@ mod tests {
 
         Blockstore::destroy(&ledger_path).expect("Expected successful database destruction");
     }
+
+    #[test]
+    fn test_repair_with_repair_validators() {
+        let cluster_slots = ClusterSlots::default();
+        let me = ContactInfo::new_localhost(&Pubkey::new_rand(), timestamp());
+        let cluster_info = Arc::new(ClusterInfo::new_with_invalid_keypair(me.clone()));
+
+        // Insert two peers on the network
+        let contact_info2 = ContactInfo::new_localhost(&Pubkey::new_rand(), timestamp());
+        let contact_info3 = ContactInfo::new_localhost(&Pubkey::new_rand(), timestamp());
+        cluster_info.insert_info(contact_info2.clone());
+        cluster_info.insert_info(contact_info3.clone());
+        let serve_repair = ServeRepair::new(cluster_info);
+
+        // If:
+        // 1) repair validator set doesn't exist in gossip
+        // 2) repair validator set only includes our own id
+        // then no repairs should be generated
+        for pubkey in &[Pubkey::new_rand(), me.id] {
+            let trusted_validators = Some(vec![*pubkey].into_iter().collect());
+            assert!(serve_repair.repair_peers(&trusted_validators, 1).is_empty());
+            assert!(serve_repair
+                .repair_request(
+                    &cluster_slots,
+                    RepairType::Shred(0, 0),
+                    &mut HashMap::new(),
+                    &mut RepairStats::default(),
+                    &trusted_validators,
+                )
+                .is_err());
+        }
+
+        // If trusted validator exists in gossip, should return repair successfully
+        let trusted_validators = Some(vec![contact_info2.id].into_iter().collect());
+        let repair_peers = serve_repair.repair_peers(&trusted_validators, 1);
+        assert_eq!(repair_peers.len(), 1);
+        assert_eq!(repair_peers[0].id, contact_info2.id);
+        assert!(serve_repair
+            .repair_request(
+                &cluster_slots,
+                RepairType::Shred(0, 0),
+                &mut HashMap::new(),
+                &mut RepairStats::default(),
+                &trusted_validators,
+            )
+            .is_ok());
+
+        // Using no trusted validators should default to all
+        // validator's available in gossip, excluding myself
+        let repair_peers: HashSet<Pubkey> = serve_repair
+            .repair_peers(&None, 1)
+            .into_iter()
+            .map(|c| c.id)
+            .collect();
+        assert_eq!(repair_peers.len(), 2);
+        assert!(repair_peers.contains(&contact_info2.id));
+        assert!(repair_peers.contains(&contact_info3.id));
+        assert!(serve_repair
+            .repair_request(
+                &cluster_slots,
+                RepairType::Shred(0, 0),
+                &mut HashMap::new(),
+                &mut RepairStats::default(),
+                &None,
+            )
+            .is_ok());
+    }
 }

core/src/tvu.rs

@@ -66,6 +66,7 @@ pub struct TvuConfig {
     pub shred_version: u16,
     pub halt_on_trusted_validators_accounts_hash_mismatch: bool,
     pub trusted_validators: Option<HashSet<Pubkey>>,
+    pub repair_validators: Option<HashSet<Pubkey>>,
     pub accounts_hash_fault_injection_slots: u64,
 }
 
@@ -150,6 +151,7 @@ impl Tvu {
             cluster_slots.clone(),
             duplicate_slots_reset_sender,
             verified_vote_receiver,
+            tvu_config.repair_validators,
         );
 
         let (ledger_cleanup_slot_sender, ledger_cleanup_slot_receiver) = channel();

core/src/validator.rs

@@ -82,6 +82,7 @@ pub struct ValidatorConfig {
     pub wait_for_supermajority: Option<Slot>,
     pub new_hard_forks: Option<Vec<Slot>>,
     pub trusted_validators: Option<HashSet<Pubkey>>, // None = trust all
+    pub repair_validators: Option<HashSet<Pubkey>>,  // None = repair from all
     pub halt_on_trusted_validators_accounts_hash_mismatch: bool,
     pub accounts_hash_fault_injection_slots: u64, // 0 = no fault injection
     pub frozen_accounts: Vec<Pubkey>,
@@ -110,6 +111,7 @@ impl Default for ValidatorConfig {
             wait_for_supermajority: None,
             new_hard_forks: None,
             trusted_validators: None,
+            repair_validators: None,
             halt_on_trusted_validators_accounts_hash_mismatch: false,
             accounts_hash_fault_injection_slots: 0,
             frozen_accounts: vec![],
@@ -472,6 +474,7 @@ impl Validator {
                     .halt_on_trusted_validators_accounts_hash_mismatch,
                 shred_version: node.info.shred_version,
                 trusted_validators: config.trusted_validators.clone(),
+                repair_validators: config.repair_validators.clone(),
                 accounts_hash_fault_injection_slots: config.accounts_hash_fault_injection_slots,
             },
         );

validator/src/main.rs

@@ -352,6 +352,29 @@ fn hardforks_of(matches: &ArgMatches<'_>, name: &str) -> Option<Vec<Slot>> {
     }
 }
 
+fn validators_set(
+    identity_pubkey: &Pubkey,
+    matches: &ArgMatches<'_>,
+    matches_name: &str,
+    arg_name: &str,
+) -> Option<HashSet<Pubkey>> {
+    if matches.is_present(matches_name) {
+        let validators_set: HashSet<_> = values_t_or_exit!(matches, matches_name, Pubkey)
+            .into_iter()
+            .collect();
+        if validators_set.contains(identity_pubkey) {
+            eprintln!(
+                "The validator's identity pubkey cannot be a {}: {}",
+                arg_name, identity_pubkey
+            );
+            exit(1);
+        }
+        Some(validators_set)
+    } else {
+        None
+    }
+}
+
 fn check_genesis_hash(
     genesis_config: &GenesisConfig,
     expected_genesis_hash: Option<Hash>,
@@ -812,6 +835,16 @@ pub fn main() {
                 .takes_value(false)
                 .help("Use the RPC service of trusted validators only")
         )
+        .arg(
+            Arg::with_name("repair_validators")
+                .long("repair-validator")
+                .validator(is_pubkey)
+                .value_name("PUBKEY")
+                .multiple(true)
+                .takes_value(true)
+                .help("A list of validators to request repairs from. If specified, repair will not \
+                       request from validators outside this set [default: request repairs from all validators]")
+        )
         .arg(
             Arg::with_name("no_rocksdb_compaction")
                 .long("no-rocksdb-compaction")
@@ -914,22 +947,18 @@ pub fn main() {
     });
 
     let no_untrusted_rpc = matches.is_present("no_untrusted_rpc");
-    let trusted_validators = if matches.is_present("trusted_validators") {
-        let trusted_validators: HashSet<_> =
-            values_t_or_exit!(matches, "trusted_validators", Pubkey)
-                .into_iter()
-                .collect();
-        if trusted_validators.contains(&identity_keypair.pubkey()) {
-            eprintln!(
-                "The validator's identity pubkey cannot be a --trusted-validator: {}",
-                identity_keypair.pubkey()
-            );
-            exit(1);
-        }
-        Some(trusted_validators)
-    } else {
-        None
-    };
+    let trusted_validators = validators_set(
+        &identity_keypair.pubkey(),
+        &matches,
+        "trusted_validators",
+        "--trusted-validator",
+    );
+    let repair_validators = validators_set(
+        &identity_keypair.pubkey(),
+        &matches,
+        "repair_validators",
+        "--repair-validator",
+    );
 
     let mut validator_config = ValidatorConfig {
         dev_halt_at_slot: value_t!(matches, "dev_halt_at_slot", Slot).ok(),
@@ -963,6 +992,7 @@ pub fn main() {
         voting_disabled: matches.is_present("no_voting"),
         wait_for_supermajority: value_t!(matches, "wait_for_supermajority", Slot).ok(),
         trusted_validators,
+        repair_validators,
         frozen_accounts: values_t!(matches, "frozen_accounts", Pubkey).unwrap_or_default(),
         no_rocksdb_compaction,
         wal_recovery_mode,