rqbit/crates/librqbit/src/torrent_state.rs
2021-07-02 13:00:46 +01:00

905 lines
30 KiB
Rust

use std::{
collections::{HashMap, HashSet},
fs::File,
net::SocketAddr,
sync::{
atomic::{AtomicU64, Ordering},
Arc,
},
time::{Duration, Instant},
};
use anyhow::Context;
use futures::{stream::FuturesUnordered, StreamExt};
use log::{debug, info, trace, warn};
use parking_lot::{Mutex, RwLock};
use tokio::{sync::mpsc::UnboundedSender, time::timeout};
use crate::{
buffers::{ByteBuf, ByteString},
chunk_tracker::{ChunkMarkingResult, ChunkTracker},
clone_to_owned::CloneToOwned,
file_ops::FileOps,
lengths::{Lengths, ValidPieceIndex},
peer_binary_protocol::{Handshake, Message, MessageOwned, Piece, Request},
peer_connection::{PeerConnection, PeerConnectionHandler, WriterRequest},
peer_state::{InflightRequest, LivePeerState, PeerState},
spawn_utils::{spawn, BlockingSpawner},
torrent_metainfo::TorrentMetaV1Owned,
type_aliases::{PeerHandle, Sha1, BF},
};
pub struct InflightPiece {
pub peer: PeerHandle,
pub started: Instant,
}
#[derive(Default)]
pub struct PeerStates {
states: HashMap<PeerHandle, PeerState>,
seen: HashSet<SocketAddr>,
inflight_pieces: HashMap<ValidPieceIndex, InflightPiece>,
tx: HashMap<PeerHandle, Arc<tokio::sync::mpsc::UnboundedSender<WriterRequest>>>,
}
#[derive(Debug, Default)]
pub struct AggregatePeerStats {
pub connecting: usize,
pub live: usize,
}
impl PeerStates {
pub fn stats(&self) -> AggregatePeerStats {
self.states
.values()
.fold(AggregatePeerStats::default(), |mut s, p| {
match p {
PeerState::Connecting(_) => s.connecting += 1,
PeerState::Live(_) => s.live += 1,
};
s
})
}
pub fn add_if_not_seen(
&mut self,
addr: SocketAddr,
tx: UnboundedSender<WriterRequest>,
) -> Option<PeerHandle> {
if self.seen.contains(&addr) {
return None;
}
let handle = self.add(addr, tx)?;
self.seen.insert(addr);
Some(handle)
}
pub fn seen(&self) -> &HashSet<SocketAddr> {
&self.seen
}
pub fn get_live(&self, handle: PeerHandle) -> Option<&LivePeerState> {
if let PeerState::Live(ref l) = self.states.get(&handle)? {
return Some(l);
}
None
}
pub fn get_live_mut(&mut self, handle: PeerHandle) -> Option<&mut LivePeerState> {
if let PeerState::Live(ref mut l) = self.states.get_mut(&handle)? {
return Some(l);
}
None
}
pub fn try_get_live_mut(&mut self, handle: PeerHandle) -> anyhow::Result<&mut LivePeerState> {
self.get_live_mut(handle)
.ok_or_else(|| anyhow::anyhow!("peer dropped"))
}
pub fn add(
&mut self,
addr: SocketAddr,
tx: UnboundedSender<WriterRequest>,
) -> Option<PeerHandle> {
let handle = addr;
if self.states.contains_key(&addr) {
return None;
}
self.states.insert(handle, PeerState::Connecting(addr));
self.tx.insert(handle, Arc::new(tx));
Some(handle)
}
pub fn drop_peer(&mut self, handle: PeerHandle) -> Option<PeerState> {
let result = self.states.remove(&handle);
self.tx.remove(&handle);
result
}
pub fn mark_i_am_choked(&mut self, handle: PeerHandle, is_choked: bool) -> Option<bool> {
let live = self.get_live_mut(handle)?;
let prev = live.i_am_choked;
live.i_am_choked = is_choked;
Some(prev)
}
pub fn mark_peer_interested(
&mut self,
handle: PeerHandle,
is_interested: bool,
) -> Option<bool> {
let live = self.get_live_mut(handle)?;
let prev = live.peer_interested;
live.peer_interested = is_interested;
Some(prev)
}
pub fn update_bitfield_from_vec(
&mut self,
handle: PeerHandle,
bitfield: Vec<u8>,
) -> Option<Option<BF>> {
let live = self.get_live_mut(handle)?;
let bitfield = BF::from_vec(bitfield);
let prev = live.bitfield.take();
live.bitfield = Some(bitfield);
Some(prev)
}
pub fn clone_tx(&self, handle: PeerHandle) -> Option<Arc<UnboundedSender<WriterRequest>>> {
Some(self.tx.get(&handle)?.clone())
}
pub fn remove_inflight_piece(&mut self, piece: ValidPieceIndex) -> Option<InflightPiece> {
self.inflight_pieces.remove(&piece)
}
}
pub struct TorrentStateLocked {
pub peers: PeerStates,
pub chunks: ChunkTracker,
}
#[derive(Default, Debug)]
pub struct AtomicStats {
pub have: AtomicU64,
pub downloaded_and_checked: AtomicU64,
pub uploaded: AtomicU64,
pub fetched_bytes: AtomicU64,
pub downloaded_pieces: AtomicU64,
pub total_piece_download_ms: AtomicU64,
}
impl AtomicStats {
pub fn average_piece_download_time(&self) -> Option<Duration> {
let d = self.downloaded_pieces.load(Ordering::Relaxed);
let t = self.total_piece_download_ms.load(Ordering::Relaxed);
if d == 0 {
return None;
}
Some(Duration::from_secs_f64(t as f64 / d as f64 / 1000f64))
}
}
#[derive(Debug)]
pub struct StatsSnapshot {
pub have_bytes: u64,
pub downloaded_and_checked_bytes: u64,
pub downloaded_and_checked_pieces: u64,
pub fetched_bytes: u64,
pub uploaded_bytes: u64,
pub initially_needed_bytes: u64,
pub remaining_bytes: u64,
pub live_peers: u32,
pub seen_peers: u32,
pub connecting_peers: u32,
pub time: Instant,
}
pub struct TorrentState {
pub torrent: TorrentMetaV1Owned,
pub locked: Arc<RwLock<TorrentStateLocked>>,
pub files: Vec<Arc<Mutex<File>>>,
pub info_hash: [u8; 20],
pub peer_id: [u8; 20],
pub lengths: Lengths,
pub needed: u64,
pub stats: AtomicStats,
pub spawner: BlockingSpawner,
}
impl TorrentState {
pub fn file_ops(&self) -> FileOps<'_, Sha1> {
FileOps::new(&self.torrent, &self.files, &self.lengths)
}
pub fn get_next_needed_piece(&self, peer_handle: PeerHandle) -> Option<ValidPieceIndex> {
let g = self.locked.read();
let bf = g.peers.get_live(peer_handle)?.bitfield.as_ref()?;
for n in g.chunks.get_needed_pieces().iter_ones() {
if bf.get(n).map(|v| *v) == Some(true) {
// in theory it should be safe without validation, but whatever.
return self.lengths.validate_piece_index(n as u32);
}
}
None
}
pub fn am_i_choked(&self, peer_handle: PeerHandle) -> Option<bool> {
self.locked
.read()
.peers
.get_live(peer_handle)
.map(|l| l.i_am_choked)
}
pub fn reserve_next_needed_piece(&self, peer_handle: PeerHandle) -> Option<ValidPieceIndex> {
if self.am_i_choked(peer_handle)? {
warn!("we are choked by {}, can't reserve next piece", peer_handle);
return None;
}
let mut g = self.locked.write();
let n = {
let mut n_opt = None;
let bf = g.peers.get_live(peer_handle)?.bitfield.as_ref()?;
for n in g.chunks.get_needed_pieces().iter_ones() {
if bf.get(n).map(|v| *v) == Some(true) {
n_opt = Some(n);
break;
}
}
self.lengths.validate_piece_index(n_opt? as u32)?
};
g.peers.inflight_pieces.insert(
n,
InflightPiece {
peer: peer_handle,
started: Instant::now(),
},
);
g.chunks.reserve_needed_piece(n);
Some(n)
}
pub fn am_i_interested_in_peer(&self, handle: PeerHandle) -> bool {
self.get_next_needed_piece(handle).is_some()
}
pub fn try_steal_old_slow_piece(&self, handle: PeerHandle) -> Option<ValidPieceIndex> {
let total = self.stats.downloaded_pieces.load(Ordering::Relaxed);
// heuristic for not enough precision in average time
if total < 20 {
return None;
}
let avg_time = self.stats.average_piece_download_time()?;
let mut g = self.locked.write();
let (idx, elapsed, piece_req) = g
.peers
.inflight_pieces
.iter_mut()
// don't steal from myself
.filter(|(_, r)| r.peer != handle)
.map(|(p, r)| (p, r.started.elapsed(), r))
.max_by_key(|(_, e, _)| *e)?;
// heuristic for "too slow peer"
if elapsed > avg_time * 10 {
debug!(
"{} will steal piece {} from {}: elapsed time {:?}, avg piece time: {:?}",
handle, idx, piece_req.peer, elapsed, avg_time
);
piece_req.peer = handle;
piece_req.started = Instant::now();
return Some(*idx);
}
None
}
pub fn try_steal_piece(&self, handle: PeerHandle) -> Option<ValidPieceIndex> {
let mut rng = rand::thread_rng();
use rand::seq::IteratorRandom;
let g = self.locked.read();
let pl = g.peers.get_live(handle)?;
g.peers
.inflight_pieces
.keys()
.filter(|p| !pl.inflight_requests.iter().any(|req| req.piece == **p))
.choose(&mut rng)
.copied()
}
pub fn set_peer_live(&self, handle: PeerHandle, h: Handshake) {
let mut g = self.locked.write();
match g.peers.states.get_mut(&handle) {
Some(s @ &mut PeerState::Connecting(_)) => {
*s = PeerState::Live(LivePeerState::new(h.peer_id));
}
_ => {
warn!("peer {} was in wrong state", handle);
}
}
}
pub fn drop_peer(&self, handle: PeerHandle) -> bool {
let mut g = self.locked.write();
let peer = match g.peers.drop_peer(handle) {
Some(peer) => peer,
None => return false,
};
match peer {
PeerState::Connecting(_) => {}
PeerState::Live(l) => {
for req in l.inflight_requests {
g.chunks.mark_chunk_request_cancelled(req.piece, req.chunk);
}
}
}
true
}
pub fn get_uploaded(&self) -> u64 {
self.stats.uploaded.load(Ordering::Relaxed)
}
pub fn get_downloaded(&self) -> u64 {
self.stats.downloaded_and_checked.load(Ordering::Relaxed)
}
pub fn get_left_to_download(&self) -> u64 {
self.needed - self.get_downloaded()
}
pub fn maybe_transmit_haves(&self, index: ValidPieceIndex) {
let mut futures = Vec::new();
let g = self.locked.read();
for (handle, peer_state) in g.peers.states.iter() {
match peer_state {
PeerState::Live(live) => {
if !live.peer_interested {
continue;
}
if live
.bitfield
.as_ref()
.and_then(|b| b.get(index.get() as usize).map(|v| *v))
.unwrap_or(false)
{
continue;
}
let tx = match g.peers.tx.get(handle) {
Some(tx) => tx,
None => continue,
};
let tx = Arc::downgrade(tx);
futures.push(async move {
if let Some(tx) = tx.upgrade() {
if tx
.send(WriterRequest::Message(Message::Have(index.get())))
.is_err()
{
// whatever
}
}
});
}
_ => continue,
}
}
if futures.is_empty() {
trace!("no peers to transmit Have={} to, saving some work", index);
return;
}
let mut unordered: FuturesUnordered<_> = futures.into_iter().collect();
spawn(
format!("transmit_haves(piece={}, count={})", index, unordered.len()),
async move {
while unordered.next().await.is_some() {}
Ok(())
},
);
}
pub fn add_peer_if_not_seen(self: &Arc<Self>, addr: SocketAddr) -> bool {
let (out_tx, out_rx) = tokio::sync::mpsc::unbounded_channel::<WriterRequest>();
let handle = match self.locked.write().peers.add_if_not_seen(addr, out_tx) {
Some(handle) => handle,
None => return false,
};
let handler = PeerHandler {
addr,
state: self.clone(),
spawner: self.spawner,
};
let peer_connection =
PeerConnection::new(addr, self.torrent.info_hash, self.peer_id, handler);
spawn(format!("manage_peer({})", handle), async move {
if let Err(e) = peer_connection.manage_peer(out_rx).await {
debug!("error managing peer {}: {:#}", handle, e)
};
peer_connection.into_handler().state.drop_peer(handle);
Ok::<_, anyhow::Error>(())
});
true
}
pub fn stats_snapshot(&self) -> StatsSnapshot {
let g = self.locked.read();
use Ordering::*;
let (live, connecting) =
g.peers
.states
.values()
.fold((0u32, 0u32), |(live, connecting), p| match p {
PeerState::Connecting(_) => (live, connecting + 1),
PeerState::Live(_) => (live + 1, connecting),
});
let downloaded = self.stats.downloaded_and_checked.load(Relaxed);
let remaining = self.needed - downloaded;
StatsSnapshot {
have_bytes: self.stats.have.load(Relaxed),
downloaded_and_checked_bytes: downloaded,
downloaded_and_checked_pieces: self.stats.downloaded_pieces.load(Relaxed),
fetched_bytes: self.stats.fetched_bytes.load(Relaxed),
uploaded_bytes: self.stats.fetched_bytes.load(Relaxed),
live_peers: live,
seen_peers: g.peers.seen.len() as u32,
connecting_peers: connecting,
time: Instant::now(),
initially_needed_bytes: self.needed,
remaining_bytes: remaining,
}
}
}
#[derive(Clone)]
struct PeerHandler {
state: Arc<TorrentState>,
addr: SocketAddr,
spawner: BlockingSpawner,
}
impl PeerConnectionHandler for PeerHandler {
fn on_received_message(&self, message: Message<ByteBuf<'_>>) -> anyhow::Result<()> {
match message {
Message::Request(request) => {
self.on_download_request(self.addr, request)
.with_context(|| {
format!("error handling download request from {}", self.addr)
})?;
}
Message::Bitfield(b) => self.on_bitfield(self.addr, b.clone_to_owned())?,
Message::Choke => self.on_i_am_choked(self.addr),
Message::Unchoke => self.on_i_am_unchoked(self.addr),
Message::Interested => self.on_peer_interested(self.addr),
Message::Piece(piece) => {
self.on_received_piece(self.addr, piece)
.context("error in on_received_piece()")?;
}
Message::KeepAlive => {
debug!("keepalive received from {}", self.addr);
}
Message::Have(h) => self.on_have(self.addr, h),
Message::NotInterested => {
info!("received \"not interested\", but we don't care yet")
}
message => {
warn!(
"{}: received unsupported message {:?}, ignoring",
self.addr, message
);
}
}
Ok(())
}
fn get_have_bytes(&self) -> u64 {
self.state.stats.have.load(Ordering::Relaxed)
}
fn serialize_bitfield_message_to_buf(&self, buf: &mut Vec<u8>) -> Option<usize> {
let g = self.state.locked.read();
let msg = Message::Bitfield(ByteBuf(g.chunks.get_have_pieces().as_raw_slice()));
let len = msg.serialize(buf, None).unwrap();
debug!("sending to {}: {:?}, length={}", self.addr, &msg, len);
Some(len)
}
fn on_handshake(&self, handshake: Handshake) {
self.state.set_peer_live(self.addr, handshake)
}
fn on_uploaded_bytes(&self, bytes: u32) {
self.state
.stats
.uploaded
.fetch_add(bytes as u64, Ordering::Relaxed);
}
fn read_chunk(&self, chunk: &crate::lengths::ChunkInfo, buf: &mut [u8]) -> anyhow::Result<()> {
self.state.file_ops().read_chunk(self.addr, chunk, buf)
}
fn on_extended_handshake(
&self,
extended_handshake: &crate::peer_binary_protocol::ExtendedHandshake<ByteBuf>,
) {
}
}
impl PeerHandler {
fn on_download_request(&self, peer_handle: PeerHandle, request: Request) -> anyhow::Result<()> {
let piece_index = match self.state.lengths.validate_piece_index(request.index) {
Some(p) => p,
None => {
anyhow::bail!(
"{}: received {:?}, but it is not a valid chunk request (piece index is invalid). Ignoring.",
peer_handle, request
);
}
};
let chunk_info = match self.state.lengths.chunk_info_from_received_data(
piece_index,
request.begin,
request.length,
) {
Some(d) => d,
None => {
anyhow::bail!(
"{}: received {:?}, but it is not a valid chunk request (chunk data is invalid). Ignoring.",
peer_handle, request
);
}
};
let tx = {
let g = self.state.locked.read();
if !g.chunks.is_chunk_ready_to_upload(&chunk_info) {
anyhow::bail!(
"got request for a chunk that is not ready to upload. chunk {:?}",
&chunk_info
);
}
g.peers.clone_tx(peer_handle).ok_or_else(|| {
anyhow::anyhow!(
"peer {} died, dropping chunk that it requested",
peer_handle
)
})?
};
// TODO: this is not super efficient as it does copying multiple times.
// Theoretically, this could be done in the sending code, so that it reads straight into
// the send buffer.
let request = WriterRequest::ReadChunkRequest(chunk_info);
debug!("sending to {}: {:?}", peer_handle, &request);
Ok::<_, anyhow::Error>(tx.send(request)?)
}
fn on_have(&self, handle: PeerHandle, have: u32) {
if let Some(bitfield) = self
.state
.locked
.write()
.peers
.get_live_mut(handle)
.and_then(|l| l.bitfield.as_mut())
{
debug!("{}: updated bitfield with have={}", handle, have);
bitfield.set(have as usize, true)
}
}
fn on_bitfield(&self, handle: PeerHandle, bitfield: ByteString) -> anyhow::Result<()> {
if bitfield.len() != self.state.lengths.piece_bitfield_bytes() as usize {
anyhow::bail!(
"dropping {} as its bitfield has unexpected size. Got {}, expected {}",
handle,
bitfield.len(),
self.state.lengths.piece_bitfield_bytes(),
);
}
self.state
.locked
.write()
.peers
.update_bitfield_from_vec(handle, bitfield.0);
if !self.state.am_i_interested_in_peer(handle) {
let tx = self
.state
.locked
.read()
.peers
.clone_tx(handle)
.ok_or_else(|| anyhow::anyhow!("peer closed"))?;
tx.send(WriterRequest::Message(MessageOwned::Unchoke))
.context("peer dropped")?;
tx.send(WriterRequest::Message(MessageOwned::NotInterested))
.context("peer dropped")?;
return Ok(());
}
// Additional spawn per peer, not good.
spawn(
format!("peer_chunk_requester({})", handle),
self.clone().task_peer_chunk_requester(handle),
);
Ok(())
}
async fn task_peer_chunk_requester(self, handle: PeerHandle) -> anyhow::Result<()> {
let tx = match self.state.locked.read().peers.clone_tx(handle) {
Some(tx) => tx,
None => return Ok(()),
};
tx.send(WriterRequest::Message(MessageOwned::Unchoke))
.context("peer dropped")?;
tx.send(WriterRequest::Message(MessageOwned::Interested))
.context("peer dropped")?;
self.requester(handle).await?;
Ok::<_, anyhow::Error>(())
}
fn on_i_am_choked(&self, handle: PeerHandle) {
warn!("we are choked by {}", handle);
self.state
.locked
.write()
.peers
.mark_i_am_choked(handle, true);
}
fn on_peer_interested(&self, handle: PeerHandle) {
debug!("peer {} is interested", handle);
self.state
.locked
.write()
.peers
.mark_peer_interested(handle, true);
}
async fn requester(self, handle: PeerHandle) -> anyhow::Result<()> {
let notify = match self.state.locked.read().peers.get_live(handle) {
Some(l) => l.have_notify.clone(),
None => return Ok(()),
};
// TODO: this might dangle, same below.
#[allow(unused_must_use)]
{
timeout(Duration::from_secs(60), notify.notified()).await;
}
loop {
match self.state.am_i_choked(handle) {
Some(true) => {
warn!("we are choked by {}, can't reserve next piece", handle);
#[allow(unused_must_use)]
{
timeout(Duration::from_secs(60), notify.notified()).await;
}
continue;
}
Some(false) => {}
None => return Ok(()),
}
let next = match self.state.try_steal_old_slow_piece(handle) {
Some(next) => next,
None => match self.state.reserve_next_needed_piece(handle) {
Some(next) => next,
None => {
if self.state.get_left_to_download() == 0 {
debug!("{}: nothing left to download, closing requester", handle);
return Ok(());
}
if let Some(piece) = self.state.try_steal_piece(handle) {
debug!("{}: stole a piece {}", handle, piece);
piece
} else {
debug!("no pieces to request from {}", handle);
#[allow(unused_must_use)]
{
timeout(Duration::from_secs(60), notify.notified()).await;
}
continue;
}
}
},
};
let tx = match self.state.locked.read().peers.clone_tx(handle) {
Some(tx) => tx,
None => return Ok(()),
};
let sem = match self.state.locked.read().peers.get_live(handle) {
Some(live) => live.requests_sem.clone(),
None => return Ok(()),
};
for chunk in self.state.lengths.iter_chunk_infos(next) {
if self.state.locked.read().chunks.is_chunk_downloaded(&chunk) {
continue;
}
if !self
.state
.locked
.write()
.peers
.try_get_live_mut(handle)?
.inflight_requests
.insert(InflightRequest::from(&chunk))
{
warn!(
"{}: probably a bug, we already requested {:?}",
handle, chunk
);
continue;
}
let request = Request {
index: next.get(),
begin: chunk.offset,
length: chunk.size,
};
sem.acquire().await?.forget();
tx.send(WriterRequest::Message(MessageOwned::Request(request)))
.context("peer dropped")?;
}
}
}
fn on_i_am_unchoked(&self, handle: PeerHandle) {
debug!("we are unchoked by {}", handle);
let mut g = self.state.locked.write();
let live = match g.peers.get_live_mut(handle) {
Some(live) => live,
None => return,
};
live.i_am_choked = false;
live.have_notify.notify_waiters();
live.requests_sem.add_permits(16);
}
fn on_received_piece(&self, handle: PeerHandle, piece: Piece<ByteBuf>) -> anyhow::Result<()> {
let chunk_info = match self.state.lengths.chunk_info_from_received_piece(&piece) {
Some(i) => i,
None => {
anyhow::bail!(
"peer {} sent us a piece that is invalid {:?}",
handle,
&piece,
);
}
};
let mut g = self.state.locked.write();
let h = g.peers.try_get_live_mut(handle)?;
h.requests_sem.add_permits(1);
self.state
.stats
.fetched_bytes
.fetch_add(piece.block.len() as u64, Ordering::Relaxed);
if !h
.inflight_requests
.remove(&InflightRequest::from(&chunk_info))
{
anyhow::bail!(
"peer {} sent us a piece that we did not ask it for. Requested pieces: {:?}. Got: {:?}", handle, &h.inflight_requests, &piece,
);
}
let full_piece_download_time = match g.chunks.mark_chunk_downloaded(&piece) {
Some(ChunkMarkingResult::Completed) => {
debug!(
"piece={} done by {}, will write and checksum",
piece.index, handle
);
// This will prevent others from stealing it.
g.peers
.remove_inflight_piece(chunk_info.piece_index)
.map(|t| t.started.elapsed())
}
Some(ChunkMarkingResult::PreviouslyCompleted) => {
// TODO: we might need to send cancellations here.
debug!(
"piece={} was done by someone else {}, ignoring",
piece.index, handle
);
return Ok(());
}
Some(ChunkMarkingResult::NotCompleted) => None,
None => {
anyhow::bail!(
"bogus data received from {}: {:?}, cannot map this to a chunk, dropping peer",
handle,
piece
);
}
};
// to prevent deadlocks.
drop(g);
self.spawner
.spawn_block_in_place(move || {
let index = piece.index;
// TODO: in theory we should unmark the piece as downloaded here. But if there was a disk error, what
// should we really do? If we unmark it, it will get requested forever...
//
// So let's just unwrap and abort.
self.state
.file_ops()
.write_chunk(handle, &piece, &chunk_info)
.expect("expected to be able to write to disk");
let full_piece_download_time = match full_piece_download_time {
Some(t) => t,
None => return Ok(()),
};
match self
.state
.file_ops()
.check_piece(handle, chunk_info.piece_index, &chunk_info)
.with_context(|| format!("error checking piece={}", index))?
{
true => {
let piece_len =
self.state.lengths.piece_length(chunk_info.piece_index) as u64;
self.state
.stats
.downloaded_and_checked
.fetch_add(piece_len, Ordering::Relaxed);
self.state
.stats
.have
.fetch_add(piece_len, Ordering::Relaxed);
self.state
.stats
.downloaded_pieces
.fetch_add(1, Ordering::Relaxed);
self.state
.stats
.downloaded_pieces
.fetch_add(1, Ordering::Relaxed);
self.state.stats.total_piece_download_ms.fetch_add(
full_piece_download_time.as_millis() as u64,
Ordering::Relaxed,
);
self.state
.locked
.write()
.chunks
.mark_piece_downloaded(chunk_info.piece_index);
debug!(
"piece={} successfully downloaded and verified from {}",
index, handle
);
self.state.maybe_transmit_haves(chunk_info.piece_index);
}
false => {
warn!(
"checksum for piece={} did not validate, came from {}",
index, handle
);
self.state
.locked
.write()
.chunks
.mark_piece_broken(chunk_info.piece_index);
}
};
Ok::<_, anyhow::Error>(())
})
.with_context(|| format!("error processing received chunk {:?}", chunk_info))?;
Ok(())
}
}