406 lines
13 KiB
Rust
406 lines
13 KiB
Rust
//! The `shred_fetch_stage` pulls shreds from UDP sockets and sends it to a channel.
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use {
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crate::{cluster_nodes::check_feature_activation, serve_repair::ServeRepair},
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crossbeam_channel::{unbounded, Sender},
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solana_gossip::cluster_info::ClusterInfo,
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solana_ledger::shred::{should_discard_shred, ShredFetchStats},
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solana_perf::packet::{PacketBatch, PacketBatchRecycler, PacketFlags},
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solana_runtime::{bank::Bank, bank_forks::BankForks},
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solana_sdk::{
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clock::{Slot, DEFAULT_MS_PER_SLOT},
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feature_set,
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},
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solana_streamer::streamer::{self, PacketBatchReceiver, StreamerReceiveStats},
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std::{
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net::UdpSocket,
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sync::{
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atomic::{AtomicBool, Ordering},
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Arc, RwLock,
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},
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thread::{self, Builder, JoinHandle},
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time::{Duration, Instant},
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},
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};
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pub(crate) struct ShredFetchStage {
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thread_hdls: Vec<JoinHandle<()>>,
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}
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impl ShredFetchStage {
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// updates packets received on a channel and sends them on another channel
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fn modify_packets(
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recvr: PacketBatchReceiver,
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sendr: Sender<PacketBatch>,
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bank_forks: &RwLock<BankForks>,
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shred_version: u16,
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name: &'static str,
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flags: PacketFlags,
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repair_context: Option<(&UdpSocket, &ClusterInfo)>,
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turbine_disabled: Arc<AtomicBool>,
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) {
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const STATS_SUBMIT_CADENCE: Duration = Duration::from_secs(1);
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let mut last_updated = Instant::now();
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let mut keypair = repair_context
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.as_ref()
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.map(|(_, cluster_info)| cluster_info.keypair().clone());
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// In the case of bank_forks=None, setup to accept any slot range
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let mut root_bank = bank_forks.read().unwrap().root_bank();
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let mut last_root = 0;
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let mut last_slot = std::u64::MAX;
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let mut slots_per_epoch = 0;
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let mut stats = ShredFetchStats::default();
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for mut packet_batch in recvr {
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if last_updated.elapsed().as_millis() as u64 > DEFAULT_MS_PER_SLOT {
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last_updated = Instant::now();
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{
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let bank_forks_r = bank_forks.read().unwrap();
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last_root = bank_forks_r.root();
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let working_bank = bank_forks_r.working_bank();
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last_slot = working_bank.slot();
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root_bank = bank_forks_r.root_bank();
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slots_per_epoch = root_bank.get_slots_in_epoch(root_bank.epoch());
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}
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keypair = repair_context
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.as_ref()
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.map(|(_, cluster_info)| cluster_info.keypair().clone());
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}
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stats.shred_count += packet_batch.len();
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if let Some((udp_socket, _)) = repair_context {
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debug_assert_eq!(flags, PacketFlags::REPAIR);
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debug_assert!(keypair.is_some());
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if let Some(ref keypair) = keypair {
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ServeRepair::handle_repair_response_pings(
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udp_socket,
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keypair,
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&mut packet_batch,
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&mut stats,
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);
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}
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}
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// Limit shreds to 2 epochs away.
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let max_slot = last_slot + 2 * slots_per_epoch;
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let should_drop_merkle_shreds =
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|shred_slot| should_drop_merkle_shreds(shred_slot, &root_bank);
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let turbine_disabled = turbine_disabled.load(Ordering::Relaxed);
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for packet in packet_batch.iter_mut() {
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if turbine_disabled
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|| should_discard_shred(
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packet,
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last_root,
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max_slot,
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shred_version,
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should_drop_merkle_shreds,
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&mut stats,
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)
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{
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packet.meta_mut().set_discard(true);
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} else {
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packet.meta_mut().flags.insert(flags);
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}
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}
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stats.maybe_submit(name, STATS_SUBMIT_CADENCE);
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if sendr.send(packet_batch).is_err() {
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break;
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}
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}
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}
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#[allow(clippy::too_many_arguments)]
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fn packet_modifier(
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sockets: Vec<Arc<UdpSocket>>,
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exit: &Arc<AtomicBool>,
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sender: Sender<PacketBatch>,
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recycler: PacketBatchRecycler,
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bank_forks: Arc<RwLock<BankForks>>,
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shred_version: u16,
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name: &'static str,
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flags: PacketFlags,
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repair_context: Option<(Arc<UdpSocket>, Arc<ClusterInfo>)>,
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turbine_disabled: Arc<AtomicBool>,
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) -> (Vec<JoinHandle<()>>, JoinHandle<()>) {
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let (packet_sender, packet_receiver) = unbounded();
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let streamers = sockets
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.into_iter()
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.map(|s| {
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streamer::receiver(
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s,
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exit.clone(),
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packet_sender.clone(),
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recycler.clone(),
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Arc::new(StreamerReceiveStats::new("packet_modifier")),
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Duration::from_millis(1), // coalesce
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true,
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None,
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)
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})
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.collect();
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let modifier_hdl = Builder::new()
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.name("solTvuFetchPMod".to_string())
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.spawn(move || {
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let repair_context = repair_context
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.as_ref()
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.map(|(socket, cluster_info)| (socket.as_ref(), cluster_info.as_ref()));
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Self::modify_packets(
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packet_receiver,
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sender,
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&bank_forks,
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shred_version,
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name,
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flags,
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repair_context,
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turbine_disabled,
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)
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})
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.unwrap();
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(streamers, modifier_hdl)
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}
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pub(crate) fn new(
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sockets: Vec<Arc<UdpSocket>>,
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forward_sockets: Vec<Arc<UdpSocket>>,
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repair_socket: Arc<UdpSocket>,
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sender: Sender<PacketBatch>,
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shred_version: u16,
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bank_forks: Arc<RwLock<BankForks>>,
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cluster_info: Arc<ClusterInfo>,
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turbine_disabled: Arc<AtomicBool>,
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exit: &Arc<AtomicBool>,
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) -> Self {
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let recycler = PacketBatchRecycler::warmed(100, 1024);
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let (mut tvu_threads, tvu_filter) = Self::packet_modifier(
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sockets,
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exit,
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sender.clone(),
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recycler.clone(),
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bank_forks.clone(),
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shred_version,
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"shred_fetch",
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PacketFlags::empty(),
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None, // repair_context
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turbine_disabled.clone(),
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);
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let (tvu_forwards_threads, fwd_thread_hdl) = Self::packet_modifier(
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forward_sockets,
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exit,
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sender.clone(),
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recycler.clone(),
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bank_forks.clone(),
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shred_version,
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"shred_fetch_tvu_forwards",
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PacketFlags::FORWARDED,
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None, // repair_context
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turbine_disabled.clone(),
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);
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let (repair_receiver, repair_handler) = Self::packet_modifier(
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vec![repair_socket.clone()],
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exit,
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sender,
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recycler,
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bank_forks,
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shred_version,
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"shred_fetch_repair",
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PacketFlags::REPAIR,
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Some((repair_socket, cluster_info)),
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turbine_disabled,
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);
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tvu_threads.extend(tvu_forwards_threads.into_iter());
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tvu_threads.extend(repair_receiver.into_iter());
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tvu_threads.push(tvu_filter);
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tvu_threads.push(fwd_thread_hdl);
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tvu_threads.push(repair_handler);
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Self {
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thread_hdls: tvu_threads,
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}
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}
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pub(crate) fn join(self) -> thread::Result<()> {
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for thread_hdl in self.thread_hdls {
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thread_hdl.join()?;
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}
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Ok(())
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}
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}
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#[must_use]
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fn should_drop_merkle_shreds(shred_slot: Slot, root_bank: &Bank) -> bool {
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check_feature_activation(
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&feature_set::keep_merkle_shreds::id(),
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shred_slot,
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root_bank,
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) && !check_feature_activation(
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&feature_set::drop_merkle_shreds::id(),
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shred_slot,
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root_bank,
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)
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}
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#[cfg(test)]
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mod tests {
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use {
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super::*,
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solana_ledger::{
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blockstore::MAX_DATA_SHREDS_PER_SLOT,
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shred::{ReedSolomonCache, Shred, ShredFlags},
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},
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solana_sdk::packet::Packet,
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};
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#[test]
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fn test_data_code_same_index() {
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solana_logger::setup();
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let mut packet = Packet::default();
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let mut stats = ShredFetchStats::default();
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let slot = 2;
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let shred_version = 45189;
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let shred = Shred::new_from_data(
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slot,
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3, // shred index
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1, // parent offset
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&[], // data
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ShredFlags::LAST_SHRED_IN_SLOT,
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0, // reference_tick
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shred_version,
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3, // fec_set_index
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);
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shred.copy_to_packet(&mut packet);
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let last_root = 0;
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let last_slot = 100;
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let slots_per_epoch = 10;
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let max_slot = last_slot + 2 * slots_per_epoch;
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assert!(!should_discard_shred(
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&packet,
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last_root,
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max_slot,
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shred_version,
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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let coding = solana_ledger::shred::Shredder::generate_coding_shreds(
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&[shred],
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3, // next_code_index
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&ReedSolomonCache::default(),
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);
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coding[0].copy_to_packet(&mut packet);
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assert!(!should_discard_shred(
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&packet,
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last_root,
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max_slot,
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shred_version,
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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}
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#[test]
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fn test_shred_filter() {
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solana_logger::setup();
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let mut packet = Packet::default();
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let mut stats = ShredFetchStats::default();
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let last_root = 0;
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let last_slot = 100;
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let slots_per_epoch = 10;
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let shred_version = 59445;
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let max_slot = last_slot + 2 * slots_per_epoch;
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// packet size is 0, so cannot get index
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assert!(should_discard_shred(
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&packet,
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last_root,
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max_slot,
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shred_version,
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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assert_eq!(stats.index_overrun, 1);
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let shred = Shred::new_from_data(
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2, // slot
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3, // index
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1, // parent_offset
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&[], // data
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ShredFlags::LAST_SHRED_IN_SLOT,
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0, // reference_tick
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shred_version,
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0, // fec_set_index
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);
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shred.copy_to_packet(&mut packet);
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// rejected slot is 2, root is 3
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assert!(should_discard_shred(
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&packet,
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3,
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max_slot,
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shred_version,
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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assert_eq!(stats.slot_out_of_range, 1);
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assert!(should_discard_shred(
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&packet,
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last_root,
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max_slot,
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345, // shred_version
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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assert_eq!(stats.shred_version_mismatch, 1);
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// Accepted for 1,3
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assert!(!should_discard_shred(
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&packet,
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last_root,
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max_slot,
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shred_version,
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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let shred = Shred::new_from_data(
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1_000_000,
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3,
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0,
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&[],
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ShredFlags::LAST_SHRED_IN_SLOT,
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0,
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0,
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0,
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);
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shred.copy_to_packet(&mut packet);
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// Slot 1 million is too high
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assert!(should_discard_shred(
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&packet,
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last_root,
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max_slot,
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shred_version,
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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let index = MAX_DATA_SHREDS_PER_SLOT as u32;
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let shred = Shred::new_from_data(5, index, 0, &[], ShredFlags::LAST_SHRED_IN_SLOT, 0, 0, 0);
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shred.copy_to_packet(&mut packet);
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assert!(should_discard_shred(
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&packet,
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last_root,
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max_slot,
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shred_version,
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|_| false, // should_drop_merkle_shreds
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&mut stats,
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));
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}
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}
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