chain sync initial state refact

This commit is contained in:
Nikolay Volf 2016-01-29 17:42:29 +04:00
parent 53c2cbc631
commit 15fdebc4f3
2 changed files with 109 additions and 41 deletions

View File

@ -21,6 +21,7 @@ use client::{BlockChainClient, BlockStatus};
use sync::range_collection::{RangeCollection, ToUsize, FromUsize}; use sync::range_collection::{RangeCollection, ToUsize, FromUsize};
use error::*; use error::*;
use sync::io::SyncIo; use sync::io::SyncIo;
use std::option::Option;
impl ToUsize for BlockNumber { impl ToUsize for BlockNumber {
fn to_usize(&self) -> usize { fn to_usize(&self) -> usize {
@ -99,14 +100,14 @@ pub struct SyncStatus {
pub protocol_version: u8, pub protocol_version: u8,
/// BlockChain height for the moment the sync started. /// BlockChain height for the moment the sync started.
pub start_block_number: BlockNumber, pub start_block_number: BlockNumber,
/// Last fully downloaded and imported block number. /// Last fully downloaded and imported block number (if any).
pub last_imported_block_number: BlockNumber, pub last_imported_block_number: Option<BlockNumber>,
/// Highest block number in the download queue. /// Highest block number in the download queue (if any).
pub highest_block_number: BlockNumber, pub highest_block_number: Option<BlockNumber>,
/// Total number of blocks for the sync process. /// Total number of blocks for the sync process.
pub blocks_total: usize, pub blocks_total: BlockNumber,
/// Number of blocks downloaded so far. /// Number of blocks downloaded so far.
pub blocks_received: usize, pub blocks_received: BlockNumber,
/// Total number of connected peers /// Total number of connected peers
pub num_peers: usize, pub num_peers: usize,
/// Total number of active peers /// Total number of active peers
@ -147,7 +148,7 @@ pub struct ChainSync {
/// Last block number for the start of sync /// Last block number for the start of sync
starting_block: BlockNumber, starting_block: BlockNumber,
/// Highest block number seen /// Highest block number seen
highest_block: BlockNumber, highest_block: Option<BlockNumber>,
/// Set of block header numbers being downloaded /// Set of block header numbers being downloaded
downloading_headers: HashSet<BlockNumber>, downloading_headers: HashSet<BlockNumber>,
/// Set of block body numbers being downloaded /// Set of block body numbers being downloaded
@ -161,9 +162,9 @@ pub struct ChainSync {
/// Used to map body to header /// Used to map body to header
header_ids: HashMap<HeaderId, BlockNumber>, header_ids: HashMap<HeaderId, BlockNumber>,
/// Last impoted block number /// Last impoted block number
last_imported_block: BlockNumber, last_imported_block: Option<BlockNumber>,
/// Last impoted block hash /// Last impoted block hash
last_imported_hash: H256, last_imported_hash: Option<H256>,
/// Syncing total difficulty /// Syncing total difficulty
syncing_difficulty: U256, syncing_difficulty: U256,
/// True if common block for our and remote chain has been found /// True if common block for our and remote chain has been found
@ -177,15 +178,15 @@ impl ChainSync {
ChainSync { ChainSync {
state: SyncState::NotSynced, state: SyncState::NotSynced,
starting_block: 0, starting_block: 0,
highest_block: 0, highest_block: None,
downloading_headers: HashSet::new(), downloading_headers: HashSet::new(),
downloading_bodies: HashSet::new(), downloading_bodies: HashSet::new(),
headers: Vec::new(), headers: Vec::new(),
bodies: Vec::new(), bodies: Vec::new(),
peers: HashMap::new(), peers: HashMap::new(),
header_ids: HashMap::new(), header_ids: HashMap::new(),
last_imported_block: 0, last_imported_block: None,
last_imported_hash: H256::new(), last_imported_hash: None,
syncing_difficulty: U256::from(0u64), syncing_difficulty: U256::from(0u64),
have_common_block: false, have_common_block: false,
} }
@ -199,8 +200,8 @@ impl ChainSync {
start_block_number: self.starting_block, start_block_number: self.starting_block,
last_imported_block_number: self.last_imported_block, last_imported_block_number: self.last_imported_block,
highest_block_number: self.highest_block, highest_block_number: self.highest_block,
blocks_received: (self.last_imported_block - self.starting_block) as usize, blocks_received: match self.last_imported_block { None => 0, Some(x) => x - self.starting_block },
blocks_total: (self.highest_block - self.starting_block) as usize, blocks_total: match self.highest_block { None => 0, Some(x) => x - self.starting_block },
num_peers: self.peers.len(), num_peers: self.peers.len(),
num_active_peers: self.peers.values().filter(|p| p.asking != PeerAsking::Nothing).count(), num_active_peers: self.peers.values().filter(|p| p.asking != PeerAsking::Nothing).count(),
} }
@ -229,10 +230,10 @@ impl ChainSync {
/// Restart sync /// Restart sync
pub fn restart(&mut self, io: &mut SyncIo) { pub fn restart(&mut self, io: &mut SyncIo) {
self.reset(); self.reset();
self.last_imported_block = 0; self.last_imported_block = None;
self.last_imported_hash = H256::new(); self.last_imported_hash = None;
self.starting_block = 0; self.starting_block = 0;
self.highest_block = 0; self.highest_block = None;
self.have_common_block = false; self.have_common_block = false;
io.chain().clear_queue(); io.chain().clear_queue();
self.starting_block = io.chain().chain_info().best_block_number; self.starting_block = io.chain().chain_info().best_block_number;
@ -293,25 +294,27 @@ impl ChainSync {
for i in 0..item_count { for i in 0..item_count {
let info: BlockHeader = try!(r.val_at(i)); let info: BlockHeader = try!(r.val_at(i));
let number = BlockNumber::from(info.number); let number = BlockNumber::from(info.number);
if number <= self.last_imported_block || self.headers.have_item(&number) { if number <= self.current_base_block() || self.headers.have_item(&number) {
trace!(target: "sync", "Skipping existing block header"); trace!(target: "sync", "Skipping existing block header");
continue; continue;
} }
if number > self.highest_block {
self.highest_block = number; if self.highest_block == None || number > self.highest_block.unwrap() {
self.highest_block = Some(number);
} }
let hash = info.hash(); let hash = info.hash();
match io.chain().block_status(&hash) { match io.chain().block_status(&hash) {
BlockStatus::InChain => { BlockStatus::InChain => {
self.have_common_block = true; self.have_common_block = true;
self.last_imported_block = number; self.last_imported_block = Some(number);
self.last_imported_hash = hash.clone(); self.last_imported_hash = Some(hash.clone());
trace!(target: "sync", "Found common header {} ({})", number, hash); trace!(target: "sync", "Found common header {} ({})", number, hash);
}, },
_ => { _ => {
if self.have_common_block { if self.have_common_block {
//validate chain //validate chain
if self.have_common_block && number == self.last_imported_block + 1 && info.parent_hash != self.last_imported_hash { let base_hash = self.last_imported_hash.clone().unwrap();
if self.have_common_block && number == self.current_base_block() + 1 && info.parent_hash != base_hash {
// TODO: lower peer rating // TODO: lower peer rating
debug!(target: "sync", "Mismatched block header {} {}", number, hash); debug!(target: "sync", "Mismatched block header {} {}", number, hash);
continue; continue;
@ -407,7 +410,7 @@ impl ChainSync {
trace!(target: "sync", "{} -> NewBlock ({})", peer_id, h); trace!(target: "sync", "{} -> NewBlock ({})", peer_id, h);
let header_view = HeaderView::new(header_rlp.as_raw()); let header_view = HeaderView::new(header_rlp.as_raw());
// TODO: Decompose block and add to self.headers and self.bodies instead // TODO: Decompose block and add to self.headers and self.bodies instead
if header_view.number() == From::from(self.last_imported_block + 1) { if header_view.number() == From::from(self.current_base_block() + 1) {
match io.chain().import_block(block_rlp.as_raw().to_vec()) { match io.chain().import_block(block_rlp.as_raw().to_vec()) {
Err(ImportError::AlreadyInChain) => { Err(ImportError::AlreadyInChain) => {
trace!(target: "sync", "New block already in chain {:?}", h); trace!(target: "sync", "New block already in chain {:?}", h);
@ -550,6 +553,10 @@ impl ChainSync {
} }
} }
fn current_base_block(&self) -> BlockNumber {
match self.last_imported_block { None => 0, Some(x) => x }
}
/// Find some headers or blocks to download for a peer. /// Find some headers or blocks to download for a peer.
fn request_blocks(&mut self, io: &mut SyncIo, peer_id: PeerId) { fn request_blocks(&mut self, io: &mut SyncIo, peer_id: PeerId) {
self.clear_peer_download(peer_id); self.clear_peer_download(peer_id);
@ -563,7 +570,7 @@ impl ChainSync {
let mut needed_bodies: Vec<H256> = Vec::new(); let mut needed_bodies: Vec<H256> = Vec::new();
let mut needed_numbers: Vec<BlockNumber> = Vec::new(); let mut needed_numbers: Vec<BlockNumber> = Vec::new();
if self.have_common_block && !self.headers.is_empty() && self.headers.range_iter().next().unwrap().0 == self.last_imported_block + 1 { if self.have_common_block && !self.headers.is_empty() && self.headers.range_iter().next().unwrap().0 == self.current_base_block() + 1 {
for (start, ref items) in self.headers.range_iter() { for (start, ref items) in self.headers.range_iter() {
if needed_bodies.len() > MAX_BODIES_TO_REQUEST { if needed_bodies.len() > MAX_BODIES_TO_REQUEST {
break; break;
@ -596,12 +603,12 @@ impl ChainSync {
} }
if start == 0 { if start == 0 {
self.have_common_block = true; //reached genesis self.have_common_block = true; //reached genesis
self.last_imported_hash = chain_info.genesis_hash; self.last_imported_hash = Some(chain_info.genesis_hash);
} }
} }
if self.have_common_block { if self.have_common_block {
let mut headers: Vec<BlockNumber> = Vec::new(); let mut headers: Vec<BlockNumber> = Vec::new();
let mut prev = self.last_imported_block + 1; let mut prev = self.current_base_block() + 1;
for (next, ref items) in self.headers.range_iter() { for (next, ref items) in self.headers.range_iter() {
if !headers.is_empty() { if !headers.is_empty() {
break; break;
@ -656,7 +663,7 @@ impl ChainSync {
{ {
let headers = self.headers.range_iter().next().unwrap(); let headers = self.headers.range_iter().next().unwrap();
let bodies = self.bodies.range_iter().next().unwrap(); let bodies = self.bodies.range_iter().next().unwrap();
if headers.0 != bodies.0 || headers.0 != self.last_imported_block + 1 { if headers.0 != bodies.0 || headers.0 != self.current_base_block() + 1 {
return; return;
} }
@ -672,18 +679,18 @@ impl ChainSync {
match io.chain().import_block(block_rlp.out()) { match io.chain().import_block(block_rlp.out()) {
Err(ImportError::AlreadyInChain) => { Err(ImportError::AlreadyInChain) => {
trace!(target: "sync", "Block already in chain {:?}", h); trace!(target: "sync", "Block already in chain {:?}", h);
self.last_imported_block = headers.0 + i as BlockNumber; self.last_imported_block = Some(headers.0 + i as BlockNumber);
self.last_imported_hash = h.clone(); self.last_imported_hash = Some(h.clone());
}, },
Err(ImportError::AlreadyQueued) => { Err(ImportError::AlreadyQueued) => {
trace!(target: "sync", "Block already queued {:?}", h); trace!(target: "sync", "Block already queued {:?}", h);
self.last_imported_block = headers.0 + i as BlockNumber; self.last_imported_block = Some(headers.0 + i as BlockNumber);
self.last_imported_hash = h.clone(); self.last_imported_hash = Some(h.clone());
}, },
Ok(_) => { Ok(_) => {
trace!(target: "sync", "Block queued {:?}", h); trace!(target: "sync", "Block queued {:?}", h);
self.last_imported_block = headers.0 + i as BlockNumber; self.last_imported_block = Some(headers.0 + i as BlockNumber);
self.last_imported_hash = h.clone(); self.last_imported_hash = Some(h.clone());
imported += 1; imported += 1;
}, },
Err(e) => { Err(e) => {
@ -700,8 +707,8 @@ impl ChainSync {
return; return;
} }
self.headers.remove_head(&(self.last_imported_block + 1)); self.headers.remove_head(&(self.last_imported_block.unwrap() + 1));
self.bodies.remove_head(&(self.last_imported_block + 1)); self.bodies.remove_head(&(self.last_imported_block.unwrap() + 1));
if self.headers.is_empty() { if self.headers.is_empty() {
assert!(self.bodies.is_empty()); assert!(self.bodies.is_empty());

View File

@ -4,7 +4,7 @@ use block_queue::BlockQueueInfo;
use header::{Header as BlockHeader, BlockNumber}; use header::{Header as BlockHeader, BlockNumber};
use error::*; use error::*;
use sync::io::SyncIo; use sync::io::SyncIo;
use sync::chain::ChainSync; use sync::chain::{ChainSync, SyncState};
struct TestBlockChainClient { struct TestBlockChainClient {
blocks: RwLock<HashMap<H256, Bytes>>, blocks: RwLock<HashMap<H256, Bytes>>,
@ -241,13 +241,15 @@ struct TestPeer {
} }
struct TestNet { struct TestNet {
peers: Vec<TestPeer> peers: Vec<TestPeer>,
started: bool
} }
impl TestNet { impl TestNet {
pub fn new(n: usize) -> TestNet { pub fn new(n: usize) -> TestNet {
let mut net = TestNet { let mut net = TestNet {
peers: Vec::new(), peers: Vec::new(),
started: false
}; };
for _ in 0..n { for _ in 0..n {
net.peers.push(TestPeer { net.peers.push(TestPeer {
@ -291,10 +293,28 @@ impl TestNet {
} }
} }
pub fn sync(&mut self) { pub fn restart_peer(&mut self, i: usize) {
let peer = self.peer_mut(i);
peer.sync.restart(&mut TestIo::new(&mut peer.chain, &mut peer.queue, None));
}
pub fn sync(&mut self) -> u32 {
self.start(); self.start();
let mut total_steps = 0;
while !self.done() { while !self.done() {
self.sync_step() self.sync_step();
total_steps = total_steps + 1;
}
total_steps
}
pub fn sync_steps(&mut self, count: usize) {
if !self.started {
self.start();
self.started = true;
}
for _ in 0..count {
self.sync_step();
} }
} }
@ -303,7 +323,6 @@ impl TestNet {
} }
} }
#[test] #[test]
fn full_sync_two_peers() { fn full_sync_two_peers() {
::env_logger::init().ok(); ::env_logger::init().ok();
@ -315,6 +334,26 @@ fn full_sync_two_peers() {
assert_eq!(net.peer(0).chain.blocks.read().unwrap().deref(), net.peer(1).chain.blocks.read().unwrap().deref()); assert_eq!(net.peer(0).chain.blocks.read().unwrap().deref(), net.peer(1).chain.blocks.read().unwrap().deref());
} }
#[test]
fn status_after_sync() {
::env_logger::init().ok();
let mut net = TestNet::new(3);
net.peer_mut(1).chain.add_blocks(1000, false);
net.peer_mut(2).chain.add_blocks(1000, false);
net.sync();
let status = net.peer(0).sync.status();
assert_eq!(status.state, SyncState::Idle);
}
#[test]
fn full_sync_takes_few_steps() {
let mut net = TestNet::new(3);
net.peer_mut(1).chain.add_blocks(100, false);
net.peer_mut(2).chain.add_blocks(100, false);
let total_steps = net.sync();
assert!(total_steps < 7);
}
#[test] #[test]
fn full_sync_empty_blocks() { fn full_sync_empty_blocks() {
::env_logger::init().ok(); ::env_logger::init().ok();
@ -347,3 +386,25 @@ fn forked_sync() {
assert_eq!(net.peer(1).chain.numbers.read().unwrap().deref(), &peer1_chain); assert_eq!(net.peer(1).chain.numbers.read().unwrap().deref(), &peer1_chain);
assert_eq!(net.peer(2).chain.numbers.read().unwrap().deref(), &peer1_chain); assert_eq!(net.peer(2).chain.numbers.read().unwrap().deref(), &peer1_chain);
} }
#[test]
fn chain_sync_restart() {
let mut net = TestNet::new(3);
net.peer_mut(1).chain.add_blocks(1000, false);
net.peer_mut(2).chain.add_blocks(1000, false);
net.sync_steps(8);
// make sure that sync has actually happened
assert!(net.peer(0).chain.chain_info().best_block_number > 100);
net.restart_peer(0);
let status = net.peer(0).sync.status();
assert_eq!(status.state, SyncState::NotSynced);
}
#[test]
fn chain_sync_status() {
let net = TestNet::new(2);
assert_eq!(net.peer(0).sync.status().state, SyncState::NotSynced);
}