1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
use std::collections::HashSet;
use std::sync::{Arc, Weak};
use std::thread;
use std::time::Duration;
use parking_lot::{Mutex, Condvar};
use time::precise_time_s;
use primitives::hash::H256;
use synchronization_client_core::{ClientCore, SynchronizationClientCore};
use synchronization_executor::TaskExecutor;
use synchronization_peers_tasks::{PeersTasks, TrustLevel};
use utils::{OrphanBlocksPool, OrphanTransactionsPool};
use types::PeersRef;
const MANAGEMENT_INTERVAL_MS: u64 = 10 * 1000;
const DEFAULT_NEW_PEER_BLOCK_FAILURE_INTERVAL_MS: u32 = 5 * 1000;
const DEFAULT_NEW_PEER_HEADERS_FAILURE_INTERVAL_MS: u32 = 5 * 1000;
const DEFAULT_TRUSTED_PEER_BLOCK_FAILURE_INTERVAL_MS: u32 = 20 * 1000;
const DEFAULT_TRUSTED_PEER_HEADERS_FAILURE_INTERVAL_MS: u32 = 20 * 1000;
const DEFAULT_UNKNOWN_BLOCK_REMOVAL_TIME_MS: u32 = 20 * 60 * 1000;
const DEFAULT_UNKNOWN_BLOCKS_MAX_LEN: usize = 16;
const DEFAULT_ORPHAN_TRANSACTION_REMOVAL_TIME_MS: u32 = 10 * 60 * 1000;
const DEFAULT_ORPHAN_TRANSACTIONS_MAX_LEN: usize = 10000;
pub struct ManagementWorker {
is_stopping: Arc<Mutex<bool>>,
stopping_event: Arc<Condvar>,
thread: Option<thread::JoinHandle<()>>,
}
impl ManagementWorker {
pub fn new<T: TaskExecutor>(core: Weak<Mutex<SynchronizationClientCore<T>>>) -> Self {
let is_stopping = Arc::new(Mutex::new(false));
let stopping_event = Arc::new(Condvar::new());
ManagementWorker {
is_stopping: is_stopping.clone(),
stopping_event: stopping_event.clone(),
thread: Some(thread::Builder::new()
.name("Sync management thread".to_string())
.spawn(move || ManagementWorker::worker_proc(is_stopping, stopping_event, core))
.expect("Error creating management thread"))
}
}
fn worker_proc<T: TaskExecutor>(is_stopping: Arc<Mutex<bool>>, stopping_event: Arc<Condvar>, core: Weak<Mutex<SynchronizationClientCore<T>>>) {
let peers_config = ManagePeersConfig::default();
let unknown_config = ManageUnknownBlocksConfig::default();
let orphan_config = ManageOrphanTransactionsConfig::default();
loop {
let mut lock = is_stopping.lock();
if *lock {
break;
}
if !stopping_event.wait_for(&mut lock, Duration::from_millis(MANAGEMENT_INTERVAL_MS)).timed_out() {
if *lock {
break;
}
continue;
}
drop(lock);
let core = match core.upgrade() {
None => break,
Some(core) => core,
};
let mut core = core.lock();
core.print_synchronization_information();
if core.state().is_synchronizing() || core.state().is_nearly_saturated() {
let (blocks_to_request, blocks_to_forget) = manage_synchronization_peers_blocks(&peers_config, core.peers(), core.peers_tasks());
core.forget_failed_blocks(&blocks_to_forget);
core.execute_synchronization_tasks(
if blocks_to_request.is_empty() { None } else { Some(blocks_to_request) },
if blocks_to_forget.is_empty() { None } else { Some(blocks_to_forget) },
);
manage_synchronization_peers_headers(&peers_config, core.peers(), core.peers_tasks());
manage_orphaned_transactions(&orphan_config, core.orphaned_transactions_pool());
} else {
if let Some(orphans_to_remove) = manage_unknown_orphaned_blocks(&unknown_config, core.orphaned_blocks_pool()) {
for orphan_to_remove in orphans_to_remove {
core.chain().forget_block(&orphan_to_remove);
}
}
}
}
trace!(target: "sync", "Stopping sync management thread");
}
}
impl Drop for ManagementWorker {
fn drop(&mut self) {
if let Some(join_handle) = self.thread.take() {
*self.is_stopping.lock() = true;
self.stopping_event.notify_all();
join_handle.join().expect("Clean shutdown.");
}
}
}
pub struct ManagePeersConfig {
pub new_block_failure_interval_ms: u32,
pub new_headers_failure_interval_ms: u32,
pub trusted_block_failure_interval_ms: u32,
pub trusted_headers_failure_interval_ms: u32,
}
impl Default for ManagePeersConfig {
fn default() -> Self {
ManagePeersConfig {
new_block_failure_interval_ms: DEFAULT_NEW_PEER_BLOCK_FAILURE_INTERVAL_MS,
new_headers_failure_interval_ms: DEFAULT_NEW_PEER_HEADERS_FAILURE_INTERVAL_MS,
trusted_block_failure_interval_ms: DEFAULT_TRUSTED_PEER_BLOCK_FAILURE_INTERVAL_MS,
trusted_headers_failure_interval_ms: DEFAULT_TRUSTED_PEER_HEADERS_FAILURE_INTERVAL_MS,
}
}
}
pub struct ManageUnknownBlocksConfig {
pub removal_time_ms: u32,
pub max_number: usize,
}
impl Default for ManageUnknownBlocksConfig {
fn default() -> Self {
ManageUnknownBlocksConfig {
removal_time_ms: DEFAULT_UNKNOWN_BLOCK_REMOVAL_TIME_MS,
max_number: DEFAULT_UNKNOWN_BLOCKS_MAX_LEN,
}
}
}
pub struct ManageOrphanTransactionsConfig {
pub removal_time_ms: u32,
pub max_number: usize,
}
impl Default for ManageOrphanTransactionsConfig {
fn default() -> Self {
ManageOrphanTransactionsConfig {
removal_time_ms: DEFAULT_ORPHAN_TRANSACTION_REMOVAL_TIME_MS,
max_number: DEFAULT_ORPHAN_TRANSACTIONS_MAX_LEN,
}
}
}
pub fn manage_synchronization_peers_blocks(config: &ManagePeersConfig, peers: PeersRef, peers_tasks: &mut PeersTasks) -> (Vec<H256>, Vec<H256>) {
let mut blocks_to_request: Vec<H256> = Vec::new();
let mut blocks_to_forget: Vec<H256> = Vec::new();
let now = precise_time_s();
let ordered_blocks_requests: Vec<_> = peers_tasks.ordered_blocks_requests().clone().into_iter().collect();
for (worst_peer_index, blocks_request) in ordered_blocks_requests {
let is_trusted = peers_tasks.get_peer_stats(worst_peer_index).map(|s| s.trust() == TrustLevel::Trusted).unwrap_or(false);
let block_failure_interval = if is_trusted { config.trusted_block_failure_interval_ms } else { config.new_block_failure_interval_ms };
let time_diff = now - blocks_request.timestamp;
if time_diff <= block_failure_interval as f64 / 1000f64 {
break;
}
warn!(target: "sync", "Failed to get requested block from peer#{} in {:.2} seconds.", worst_peer_index, time_diff);
let failed_blocks = peers_tasks.reset_blocks_tasks(worst_peer_index);
let (normal_blocks, failed_blocks) = peers_tasks.on_blocks_failure(failed_blocks);
blocks_to_request.extend(normal_blocks);
blocks_to_forget.extend(failed_blocks);
if peers_tasks.on_peer_block_failure(worst_peer_index) {
warn!(target: "sync", "Too many failures for peer#{}. Excluding from synchronization.", worst_peer_index);
peers_tasks.unuseful_peer(worst_peer_index);
peers.misbehaving(worst_peer_index, &format!("Too many failures."));
}
}
(blocks_to_request, blocks_to_forget)
}
pub fn manage_synchronization_peers_headers(config: &ManagePeersConfig, peers: PeersRef, peers_tasks: &mut PeersTasks) {
let now = precise_time_s();
let ordered_headers_requests: Vec<_> = peers_tasks.ordered_headers_requests().clone().into_iter().collect();
for (worst_peer_index, headers_request) in ordered_headers_requests {
let is_trusted = peers_tasks.get_peer_stats(worst_peer_index).map(|s| s.trust() == TrustLevel::Trusted).unwrap_or(false);
let headers_failure_interval = if is_trusted { config.trusted_headers_failure_interval_ms } else { config.new_headers_failure_interval_ms };
let time_diff = now - headers_request.timestamp;
if time_diff <= headers_failure_interval as f64 / 1000f64 {
break;
}
if peers_tasks.get_blocks_tasks(worst_peer_index).map(|t| !t.is_empty()).unwrap_or(false) {
continue;
}
if peers_tasks.on_peer_headers_failure(worst_peer_index) {
warn!(target: "sync", "Too many header failures for peer#{}. Excluding from synchronization.", worst_peer_index);
peers.misbehaving(worst_peer_index, &format!("Too many header failures."));
}
}
}
pub fn manage_unknown_orphaned_blocks(config: &ManageUnknownBlocksConfig, orphaned_blocks_pool: &mut OrphanBlocksPool) -> Option<Vec<H256>> {
let unknown_to_remove = {
let unknown_blocks = orphaned_blocks_pool.unknown_blocks();
let mut unknown_to_remove: HashSet<H256> = HashSet::new();
let mut remove_num = if unknown_blocks.len() > config.max_number { unknown_blocks.len() - config.max_number } else { 0 };
let now = precise_time_s();
for (hash, time) in unknown_blocks {
if remove_num > 0 {
unknown_to_remove.insert(hash.clone());
remove_num -= 1;
continue;
}
let time_diff = now - time;
if time_diff <= config.removal_time_ms as f64 / 1000f64 {
break;
}
unknown_to_remove.insert(hash.clone());
}
unknown_to_remove
};
let unknown_to_remove: Vec<H256> = orphaned_blocks_pool.remove_blocks(&unknown_to_remove).into_iter()
.map(|b| b.header.hash)
.collect();
if unknown_to_remove.is_empty() { None } else { Some(unknown_to_remove) }
}
pub fn manage_orphaned_transactions(config: &ManageOrphanTransactionsConfig, orphaned_transactions_pool: &mut OrphanTransactionsPool) -> Option<Vec<H256>> {
let orphans_to_remove = {
let unknown_transactions = orphaned_transactions_pool.transactions();
let mut orphans_to_remove: Vec<H256> = Vec::new();
let mut remove_num = if unknown_transactions.len() > config.max_number { unknown_transactions.len() - config.max_number } else { 0 };
let now = precise_time_s();
for (hash, orphan_tx) in unknown_transactions {
if remove_num > 0 {
orphans_to_remove.push(hash.clone());
remove_num -= 1;
continue;
}
let time_diff = now - orphan_tx.insertion_time;
if time_diff <= config.removal_time_ms as f64 / 1000f64 {
break;
}
orphans_to_remove.push(hash.clone());
}
orphans_to_remove
};
let orphans_to_remove: Vec<H256> = orphaned_transactions_pool.remove_transactions(&orphans_to_remove).into_iter()
.map(|t| t.hash)
.collect();
if orphans_to_remove.is_empty() { None } else { Some(orphans_to_remove) }
}
#[cfg(test)]
mod tests {
extern crate test_data;
use std::sync::Arc;
use std::collections::HashSet;
use primitives::hash::H256;
use synchronization_peers::PeersImpl;
use synchronization_peers_tasks::PeersTasks;
use super::{ManagePeersConfig, ManageUnknownBlocksConfig, ManageOrphanTransactionsConfig, manage_synchronization_peers_blocks,
manage_unknown_orphaned_blocks, manage_orphaned_transactions};
use utils::{OrphanBlocksPool, OrphanTransactionsPool};
#[test]
fn manage_good_peer() {
let config = ManagePeersConfig { new_block_failure_interval_ms: 1000, ..Default::default() };
let mut peers = PeersTasks::default();
peers.on_blocks_requested(1, &vec![H256::from(0), H256::from(1)]);
peers.on_block_received(1, &H256::from(0));
assert_eq!(manage_synchronization_peers_blocks(&config, Arc::new(PeersImpl::default()), &mut peers), (vec![], vec![]));
assert_eq!(peers.idle_peers_for_blocks().len(), 0);
}
#[test]
fn manage_bad_peers() {
use std::thread::sleep;
use std::time::Duration;
let config = ManagePeersConfig { new_block_failure_interval_ms: 0, ..Default::default() };
let mut peers = PeersTasks::default();
peers.on_blocks_requested(1, &vec![H256::from(0)]);
peers.on_blocks_requested(2, &vec![H256::from(1)]);
sleep(Duration::from_millis(1));
let managed_tasks = manage_synchronization_peers_blocks(&config, Arc::new(PeersImpl::default()), &mut peers).0;
assert!(managed_tasks.contains(&H256::from(0)));
assert!(managed_tasks.contains(&H256::from(1)));
let idle_peers = peers.idle_peers_for_blocks();
assert_eq!(2, idle_peers.len());
assert!(idle_peers.contains(&1));
assert!(idle_peers.contains(&2));
}
#[test]
fn manage_unknown_blocks_good() {
let config = ManageUnknownBlocksConfig { removal_time_ms: 1000, max_number: 100 };
let mut pool = OrphanBlocksPool::new();
let block = test_data::genesis();
pool.insert_unknown_block(block.into());
assert_eq!(manage_unknown_orphaned_blocks(&config, &mut pool), None);
assert_eq!(pool.len(), 1);
}
#[test]
fn manage_unknown_blocks_by_time() {
use std::thread::sleep;
use std::time::Duration;
let config = ManageUnknownBlocksConfig { removal_time_ms: 0, max_number: 100 };
let mut pool = OrphanBlocksPool::new();
let block = test_data::genesis();
let block_hash = block.hash();
pool.insert_unknown_block(block.into());
sleep(Duration::from_millis(1));
assert_eq!(manage_unknown_orphaned_blocks(&config, &mut pool), Some(vec![block_hash]));
assert_eq!(pool.len(), 0);
}
#[test]
fn manage_unknown_blocks_by_max_number() {
let config = ManageUnknownBlocksConfig { removal_time_ms: 100, max_number: 1 };
let mut pool = OrphanBlocksPool::new();
let block1 = test_data::genesis();
let block1_hash = block1.hash();
let block2 = test_data::block_h2();
pool.insert_unknown_block(block1.into());
pool.insert_unknown_block(block2.into());
assert_eq!(manage_unknown_orphaned_blocks(&config, &mut pool), Some(vec![block1_hash]));
assert_eq!(pool.len(), 1);
}
#[test]
fn manage_orphan_transactions_good() {
let config = ManageOrphanTransactionsConfig { removal_time_ms: 1000, max_number: 100 };
let mut pool = OrphanTransactionsPool::new();
let transaction = test_data::block_h170().transactions[1].clone();
let unknown_inputs: HashSet<H256> = transaction.inputs.iter().map(|i| i.previous_output.hash.clone()).collect();
pool.insert(transaction.into(), unknown_inputs);
assert_eq!(manage_orphaned_transactions(&config, &mut pool), None);
assert_eq!(pool.len(), 1);
}
#[test]
fn manage_orphan_transactions_by_time() {
use std::thread::sleep;
use std::time::Duration;
let config = ManageOrphanTransactionsConfig { removal_time_ms: 0, max_number: 100 };
let mut pool = OrphanTransactionsPool::new();
let transaction = test_data::block_h170().transactions[1].clone();
let unknown_inputs: HashSet<H256> = transaction.inputs.iter().map(|i| i.previous_output.hash.clone()).collect();
let transaction_hash = transaction.hash();
pool.insert(transaction.into(), unknown_inputs);
sleep(Duration::from_millis(1));
assert_eq!(manage_orphaned_transactions(&config, &mut pool), Some(vec![transaction_hash]));
assert_eq!(pool.len(), 0);
}
#[test]
fn manage_orphan_transactions_by_max_number() {
let config = ManageOrphanTransactionsConfig { removal_time_ms: 100, max_number: 1 };
let mut pool = OrphanTransactionsPool::new();
let transaction1 = test_data::block_h170().transactions[1].clone();
let unknown_inputs1: HashSet<H256> = transaction1.inputs.iter().map(|i| i.previous_output.hash.clone()).collect();
let transaction1_hash = transaction1.hash();
let transaction2 = test_data::block_h182().transactions[1].clone();
let unknown_inputs2: HashSet<H256> = transaction2.inputs.iter().map(|i| i.previous_output.hash.clone()).collect();
pool.insert(transaction1.into(), unknown_inputs1);
pool.insert(transaction2.into(), unknown_inputs2);
assert_eq!(manage_orphaned_transactions(&config, &mut pool), Some(vec![transaction1_hash]));
assert_eq!(pool.len(), 1);
}
}