Line data Source code
1 : use std::{
2 : cell::{RefCell, RefMut, UnsafeCell},
3 : ffi::CStr,
4 : sync::Arc,
5 : };
6 :
7 : use bytes::Bytes;
8 : use desim::{
9 : executor::{self, PollSome},
10 : network::TCP,
11 : node_os::NodeOs,
12 : proto::{AnyMessage, NetEvent, NodeEvent},
13 : world::NodeId,
14 : };
15 : use tracing::debug;
16 : use utils::lsn::Lsn;
17 : use walproposer::{
18 : api_bindings::Level,
19 : bindings::{
20 : NeonWALReadResult, SafekeeperStateDesiredEvents, WL_SOCKET_READABLE, WL_SOCKET_WRITEABLE,
21 : },
22 : walproposer::{ApiImpl, Config},
23 : };
24 :
25 : use super::walproposer_disk::DiskWalProposer;
26 :
27 : /// Special state for each wp->sk connection.
28 : struct SafekeeperConn {
29 : host: String,
30 : port: String,
31 : node_id: NodeId,
32 : // socket is Some(..) equals to connection is established
33 : socket: Option<TCP>,
34 : // connection is in progress
35 : is_connecting: bool,
36 : // START_WAL_PUSH is in progress
37 : is_start_wal_push: bool,
38 : // pointer to Safekeeper in walproposer for callbacks
39 : raw_ptr: *mut walproposer::bindings::Safekeeper,
40 : }
41 :
42 : impl SafekeeperConn {
43 27885 : pub fn new(host: String, port: String) -> Self {
44 27885 : // port number is the same as NodeId
45 27885 : let port_num = port.parse::<u32>().unwrap();
46 27885 : Self {
47 27885 : host,
48 27885 : port,
49 27885 : node_id: port_num,
50 27885 : socket: None,
51 27885 : is_connecting: false,
52 27885 : is_start_wal_push: false,
53 27885 : raw_ptr: std::ptr::null_mut(),
54 27885 : }
55 27885 : }
56 : }
57 :
58 : /// Simulation version of a postgres WaitEventSet. At pos 0 there is always
59 : /// a special NodeEvents channel, which is used as a latch.
60 : struct EventSet {
61 : os: NodeOs,
62 : // all pollable channels, 0 is always NodeEvent channel
63 : chans: Vec<Box<dyn PollSome>>,
64 : // 0 is always nullptr
65 : sk_ptrs: Vec<*mut walproposer::bindings::Safekeeper>,
66 : // event mask for each channel
67 : masks: Vec<u32>,
68 : }
69 :
70 : impl EventSet {
71 9295 : pub fn new(os: NodeOs) -> Self {
72 9295 : let node_events = os.node_events();
73 9295 : Self {
74 9295 : os,
75 9295 : chans: vec![Box::new(node_events)],
76 9295 : sk_ptrs: vec![std::ptr::null_mut()],
77 9295 : masks: vec![WL_SOCKET_READABLE],
78 9295 : }
79 9295 : }
80 :
81 : /// Leaves all readable channels at the beginning of the array.
82 29163 : fn sort_readable(&mut self) -> usize {
83 29163 : let mut cnt = 1;
84 69100 : for i in 1..self.chans.len() {
85 69100 : if self.masks[i] & WL_SOCKET_READABLE != 0 {
86 69100 : self.chans.swap(i, cnt);
87 69100 : self.sk_ptrs.swap(i, cnt);
88 69100 : self.masks.swap(i, cnt);
89 69100 : cnt += 1;
90 69100 : }
91 : }
92 29163 : cnt
93 29163 : }
94 :
95 68311 : fn update_event_set(&mut self, conn: &SafekeeperConn, event_mask: u32) {
96 68311 : let index = self
97 68311 : .sk_ptrs
98 68311 : .iter()
99 257342 : .position(|&ptr| ptr == conn.raw_ptr)
100 68311 : .expect("safekeeper should exist in event set");
101 68311 : self.masks[index] = event_mask;
102 68311 : }
103 :
104 61484 : fn add_safekeeper(&mut self, sk: &SafekeeperConn, event_mask: u32) {
105 148641 : for ptr in self.sk_ptrs.iter() {
106 148641 : assert!(*ptr != sk.raw_ptr);
107 : }
108 :
109 61484 : self.chans.push(Box::new(
110 61484 : sk.socket
111 61484 : .as_ref()
112 61484 : .expect("socket should not be closed")
113 61484 : .recv_chan(),
114 61484 : ));
115 61484 : self.sk_ptrs.push(sk.raw_ptr);
116 61484 : self.masks.push(event_mask);
117 61484 : }
118 :
119 38757 : fn remove_safekeeper(&mut self, sk: &SafekeeperConn) {
120 82444 : let index = self.sk_ptrs.iter().position(|&ptr| ptr == sk.raw_ptr);
121 38757 : if index.is_none() {
122 8 : debug!("remove_safekeeper: sk={:?} not found", sk.raw_ptr);
123 8 : return;
124 38749 : }
125 38749 : let index = index.unwrap();
126 38749 :
127 38749 : self.chans.remove(index);
128 38749 : self.sk_ptrs.remove(index);
129 38749 : self.masks.remove(index);
130 38749 :
131 38749 : // to simulate the actual behaviour
132 38749 : self.refresh_event_set();
133 38757 : }
134 :
135 : /// Updates all masks to match the result of a SafekeeperStateDesiredEvents.
136 45311 : fn refresh_event_set(&mut self) {
137 128481 : for (i, mask) in self.masks.iter_mut().enumerate() {
138 128481 : if i == 0 {
139 45311 : continue;
140 83170 : }
141 83170 :
142 83170 : let mut mask_sk: u32 = 0;
143 83170 : let mut mask_nwr: u32 = 0;
144 83170 : unsafe { SafekeeperStateDesiredEvents(self.sk_ptrs[i], &mut mask_sk, &mut mask_nwr) };
145 83170 :
146 83170 : if mask_sk != *mask {
147 0 : debug!(
148 0 : "refresh_event_set: sk={:?}, old_mask={:#b}, new_mask={:#b}",
149 0 : self.sk_ptrs[i], *mask, mask_sk
150 : );
151 0 : *mask = mask_sk;
152 83170 : }
153 : }
154 45311 : }
155 :
156 : /// Wait for events on all channels.
157 29163 : fn wait(&mut self, timeout_millis: i64) -> walproposer::walproposer::WaitResult {
158 : // all channels are always writeable
159 98263 : for (i, mask) in self.masks.iter().enumerate() {
160 98263 : if *mask & WL_SOCKET_WRITEABLE != 0 {
161 0 : return walproposer::walproposer::WaitResult::Network(
162 0 : self.sk_ptrs[i],
163 0 : WL_SOCKET_WRITEABLE,
164 0 : );
165 98263 : }
166 : }
167 :
168 29163 : let cnt = self.sort_readable();
169 29163 :
170 29163 : let slice = &self.chans[0..cnt];
171 29163 : match executor::epoll_chans(slice, timeout_millis) {
172 11565 : None => walproposer::walproposer::WaitResult::Timeout,
173 : Some(0) => {
174 514 : let msg = self.os.node_events().must_recv();
175 514 : match msg {
176 514 : NodeEvent::Internal(AnyMessage::Just32(0)) => {
177 514 : // got a notification about new WAL available
178 514 : }
179 0 : NodeEvent::Internal(_) => unreachable!(),
180 0 : NodeEvent::Accept(_) => unreachable!(),
181 : }
182 514 : walproposer::walproposer::WaitResult::Latch
183 : }
184 17084 : Some(index) => walproposer::walproposer::WaitResult::Network(
185 17084 : self.sk_ptrs[index],
186 17084 : WL_SOCKET_READABLE,
187 17084 : ),
188 : }
189 29163 : }
190 : }
191 :
192 : /// This struct handles all calls from walproposer into walproposer_api.
193 : pub struct SimulationApi {
194 : os: NodeOs,
195 : safekeepers: RefCell<Vec<SafekeeperConn>>,
196 : disk: Arc<DiskWalProposer>,
197 : redo_start_lsn: Option<Lsn>,
198 : last_logged_commit_lsn: u64,
199 : shmem: UnsafeCell<walproposer::bindings::WalproposerShmemState>,
200 : config: Config,
201 : event_set: RefCell<Option<EventSet>>,
202 : }
203 :
204 : pub struct Args {
205 : pub os: NodeOs,
206 : pub config: Config,
207 : pub disk: Arc<DiskWalProposer>,
208 : pub redo_start_lsn: Option<Lsn>,
209 : }
210 :
211 : impl SimulationApi {
212 9295 : pub fn new(args: Args) -> Self {
213 9295 : // initialize connection state for each safekeeper
214 9295 : let sk_conns = args
215 9295 : .config
216 9295 : .safekeepers_list
217 9295 : .iter()
218 27885 : .map(|s| {
219 27885 : SafekeeperConn::new(
220 27885 : s.split(':').next().unwrap().to_string(),
221 27885 : s.split(':').nth(1).unwrap().to_string(),
222 27885 : )
223 27885 : })
224 9295 : .collect::<Vec<_>>();
225 9295 :
226 9295 : Self {
227 9295 : os: args.os,
228 9295 : safekeepers: RefCell::new(sk_conns),
229 9295 : disk: args.disk,
230 9295 : redo_start_lsn: args.redo_start_lsn,
231 9295 : last_logged_commit_lsn: 0,
232 9295 : shmem: UnsafeCell::new(walproposer::api_bindings::empty_shmem()),
233 9295 : config: args.config,
234 9295 : event_set: RefCell::new(None),
235 9295 : }
236 9295 : }
237 :
238 : /// Get SafekeeperConn for the given Safekeeper.
239 304866 : fn get_conn(&self, sk: &mut walproposer::bindings::Safekeeper) -> RefMut<'_, SafekeeperConn> {
240 304866 : let sk_port = unsafe { CStr::from_ptr(sk.port).to_str().unwrap() };
241 304866 : let state = self.safekeepers.borrow_mut();
242 304866 : RefMut::map(state, |v| {
243 304866 : v.iter_mut()
244 608231 : .find(|conn| conn.port == sk_port)
245 304866 : .expect("safekeeper conn not found by port")
246 304866 : })
247 304866 : }
248 : }
249 :
250 : impl ApiImpl for SimulationApi {
251 325366 : fn get_current_timestamp(&self) -> i64 {
252 325366 : debug!("get_current_timestamp");
253 : // PG TimestampTZ is microseconds, but simulation unit is assumed to be
254 : // milliseconds, so add 10^3
255 325366 : self.os.now() as i64 * 1000
256 325366 : }
257 :
258 1108 : fn update_donor(&self, donor: &mut walproposer::bindings::Safekeeper, donor_lsn: u64) {
259 1108 : let mut shmem = unsafe { *self.get_shmem_state() };
260 1108 : shmem.propEpochStartLsn.value = donor_lsn;
261 1108 : shmem.donor_conninfo = donor.conninfo;
262 1108 : }
263 :
264 34259 : fn conn_status(
265 34259 : &self,
266 34259 : _: &mut walproposer::bindings::Safekeeper,
267 34259 : ) -> walproposer::bindings::WalProposerConnStatusType {
268 34259 : debug!("conn_status");
269 : // break the connection with a 10% chance
270 34259 : if self.os.random(100) < 10 {
271 3517 : walproposer::bindings::WalProposerConnStatusType_WP_CONNECTION_BAD
272 : } else {
273 30742 : walproposer::bindings::WalProposerConnStatusType_WP_CONNECTION_OK
274 : }
275 34259 : }
276 :
277 34259 : fn conn_connect_start(&self, sk: &mut walproposer::bindings::Safekeeper) {
278 34259 : debug!("conn_connect_start");
279 34259 : let mut conn = self.get_conn(sk);
280 34259 :
281 34259 : assert!(conn.socket.is_none());
282 34259 : let socket = self.os.open_tcp(conn.node_id);
283 34259 : conn.socket = Some(socket);
284 34259 : conn.raw_ptr = sk;
285 34259 : conn.is_connecting = true;
286 34259 : }
287 :
288 30742 : fn conn_connect_poll(
289 30742 : &self,
290 30742 : _: &mut walproposer::bindings::Safekeeper,
291 30742 : ) -> walproposer::bindings::WalProposerConnectPollStatusType {
292 30742 : debug!("conn_connect_poll");
293 : // TODO: break the connection here
294 30742 : walproposer::bindings::WalProposerConnectPollStatusType_WP_CONN_POLLING_OK
295 30742 : }
296 :
297 30742 : fn conn_send_query(&self, sk: &mut walproposer::bindings::Safekeeper, query: &str) -> bool {
298 30742 : debug!("conn_send_query: {}", query);
299 30742 : self.get_conn(sk).is_start_wal_push = true;
300 30742 : true
301 30742 : }
302 :
303 30742 : fn conn_get_query_result(
304 30742 : &self,
305 30742 : _: &mut walproposer::bindings::Safekeeper,
306 30742 : ) -> walproposer::bindings::WalProposerExecStatusType {
307 30742 : debug!("conn_get_query_result");
308 : // TODO: break the connection here
309 30742 : walproposer::bindings::WalProposerExecStatusType_WP_EXEC_SUCCESS_COPYBOTH
310 30742 : }
311 :
312 19169 : fn conn_async_read(
313 19169 : &self,
314 19169 : sk: &mut walproposer::bindings::Safekeeper,
315 19169 : vec: &mut Vec<u8>,
316 19169 : ) -> walproposer::bindings::PGAsyncReadResult {
317 19169 : debug!("conn_async_read");
318 19169 : let mut conn = self.get_conn(sk);
319 :
320 19169 : let socket = if let Some(socket) = conn.socket.as_mut() {
321 19169 : socket
322 : } else {
323 : // socket is already closed
324 0 : return walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_FAIL;
325 : };
326 :
327 19169 : let msg = socket.recv_chan().try_recv();
328 :
329 16957 : match msg {
330 : None => {
331 : // no message is ready
332 2212 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_TRY_AGAIN
333 : }
334 : Some(NetEvent::Closed) => {
335 : // connection is closed
336 7765 : debug!("conn_async_read: connection is closed");
337 7765 : conn.socket = None;
338 7765 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_FAIL
339 : }
340 9192 : Some(NetEvent::Message(msg)) => {
341 : // got a message
342 9192 : let b = match msg {
343 9192 : desim::proto::AnyMessage::Bytes(b) => b,
344 0 : _ => unreachable!(),
345 : };
346 9192 : vec.extend_from_slice(&b);
347 9192 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_SUCCESS
348 : }
349 : }
350 19169 : }
351 :
352 34742 : fn conn_blocking_write(&self, sk: &mut walproposer::bindings::Safekeeper, buf: &[u8]) -> bool {
353 34742 : let mut conn = self.get_conn(sk);
354 34742 : debug!("conn_blocking_write to {}: {:?}", conn.node_id, buf);
355 34742 : let socket = conn.socket.as_mut().unwrap();
356 34742 : socket.send(desim::proto::AnyMessage::Bytes(Bytes::copy_from_slice(buf)));
357 34742 : true
358 34742 : }
359 :
360 5508 : fn conn_async_write(
361 5508 : &self,
362 5508 : sk: &mut walproposer::bindings::Safekeeper,
363 5508 : buf: &[u8],
364 5508 : ) -> walproposer::bindings::PGAsyncWriteResult {
365 5508 : let mut conn = self.get_conn(sk);
366 5508 : debug!("conn_async_write to {}: {:?}", conn.node_id, buf);
367 5508 : if let Some(socket) = conn.socket.as_mut() {
368 5508 : socket.send(desim::proto::AnyMessage::Bytes(Bytes::copy_from_slice(buf)));
369 5508 : } else {
370 : // connection is already closed
371 0 : debug!("conn_async_write: writing to a closed socket!");
372 : // TODO: maybe we should return error here?
373 : }
374 5508 : walproposer::bindings::PGAsyncWriteResult_PG_ASYNC_WRITE_SUCCESS
375 5508 : }
376 :
377 1158 : fn wal_reader_allocate(&self, _: &mut walproposer::bindings::Safekeeper) -> NeonWALReadResult {
378 1158 : debug!("wal_reader_allocate");
379 1158 : walproposer::bindings::NeonWALReadResult_NEON_WALREAD_SUCCESS
380 1158 : }
381 :
382 964 : fn wal_read(
383 964 : &self,
384 964 : _sk: &mut walproposer::bindings::Safekeeper,
385 964 : buf: &mut [u8],
386 964 : startpos: u64,
387 964 : ) -> NeonWALReadResult {
388 964 : self.disk.lock().read(startpos, buf);
389 964 : walproposer::bindings::NeonWALReadResult_NEON_WALREAD_SUCCESS
390 964 : }
391 :
392 9295 : fn init_event_set(&self, _: &mut walproposer::bindings::WalProposer) {
393 9295 : debug!("init_event_set");
394 9295 : let new_event_set = EventSet::new(self.os.clone());
395 9295 : let old_event_set = self.event_set.replace(Some(new_event_set));
396 9295 : assert!(old_event_set.is_none());
397 9295 : }
398 :
399 68311 : fn update_event_set(&self, sk: &mut walproposer::bindings::Safekeeper, event_mask: u32) {
400 68311 : debug!(
401 0 : "update_event_set, sk={:?}, events_mask={:#b}",
402 0 : sk as *mut walproposer::bindings::Safekeeper, event_mask
403 : );
404 68311 : let conn = self.get_conn(sk);
405 68311 :
406 68311 : self.event_set
407 68311 : .borrow_mut()
408 68311 : .as_mut()
409 68311 : .unwrap()
410 68311 : .update_event_set(&conn, event_mask);
411 68311 : }
412 :
413 61484 : fn add_safekeeper_event_set(
414 61484 : &self,
415 61484 : sk: &mut walproposer::bindings::Safekeeper,
416 61484 : event_mask: u32,
417 61484 : ) {
418 61484 : debug!(
419 0 : "add_safekeeper_event_set, sk={:?}, events_mask={:#b}",
420 0 : sk as *mut walproposer::bindings::Safekeeper, event_mask
421 : );
422 :
423 61484 : self.event_set
424 61484 : .borrow_mut()
425 61484 : .as_mut()
426 61484 : .unwrap()
427 61484 : .add_safekeeper(&self.get_conn(sk), event_mask);
428 61484 : }
429 :
430 38757 : fn rm_safekeeper_event_set(&self, sk: &mut walproposer::bindings::Safekeeper) {
431 38757 : debug!(
432 0 : "rm_safekeeper_event_set, sk={:?}",
433 0 : sk as *mut walproposer::bindings::Safekeeper,
434 : );
435 :
436 38757 : self.event_set
437 38757 : .borrow_mut()
438 38757 : .as_mut()
439 38757 : .unwrap()
440 38757 : .remove_safekeeper(&self.get_conn(sk));
441 38757 : }
442 :
443 6562 : fn active_state_update_event_set(&self, sk: &mut walproposer::bindings::Safekeeper) {
444 6562 : debug!("active_state_update_event_set");
445 :
446 6562 : assert!(sk.state == walproposer::bindings::SafekeeperState_SS_ACTIVE);
447 6562 : self.event_set
448 6562 : .borrow_mut()
449 6562 : .as_mut()
450 6562 : .unwrap()
451 6562 : .refresh_event_set();
452 6562 : }
453 :
454 18133 : fn wal_reader_events(&self, _sk: &mut walproposer::bindings::Safekeeper) -> u32 {
455 18133 : 0
456 18133 : }
457 :
458 90647 : fn wait_event_set(
459 90647 : &self,
460 90647 : _: &mut walproposer::bindings::WalProposer,
461 90647 : timeout_millis: i64,
462 90647 : ) -> walproposer::walproposer::WaitResult {
463 90647 : // TODO: handle multiple stages as part of the simulation (e.g. connect, start_wal_push, etc)
464 90647 : let mut conns = self.safekeepers.borrow_mut();
465 210379 : for conn in conns.iter_mut() {
466 210379 : if conn.socket.is_some() && conn.is_connecting {
467 30742 : conn.is_connecting = false;
468 30742 : debug!("wait_event_set, connecting to {}:{}", conn.host, conn.port);
469 30742 : return walproposer::walproposer::WaitResult::Network(
470 30742 : conn.raw_ptr,
471 30742 : WL_SOCKET_READABLE | WL_SOCKET_WRITEABLE,
472 30742 : );
473 179637 : }
474 179637 : if conn.socket.is_some() && conn.is_start_wal_push {
475 30742 : conn.is_start_wal_push = false;
476 30742 : debug!(
477 0 : "wait_event_set, start wal push to {}:{}",
478 : conn.host, conn.port
479 : );
480 30742 : return walproposer::walproposer::WaitResult::Network(
481 30742 : conn.raw_ptr,
482 30742 : WL_SOCKET_READABLE,
483 30742 : );
484 148895 : }
485 : }
486 29163 : drop(conns);
487 29163 :
488 29163 : let res = self
489 29163 : .event_set
490 29163 : .borrow_mut()
491 29163 : .as_mut()
492 29163 : .unwrap()
493 29163 : .wait(timeout_millis);
494 29163 :
495 29163 : debug!(
496 0 : "wait_event_set, timeout_millis={}, res={:?}",
497 : timeout_millis, res,
498 : );
499 20367 : res
500 81851 : }
501 :
502 9295 : fn strong_random(&self, buf: &mut [u8]) -> bool {
503 9295 : debug!("strong_random");
504 9295 : buf.fill(0);
505 9295 : true
506 9295 : }
507 :
508 347 : fn finish_sync_safekeepers(&self, lsn: u64) {
509 347 : debug!("finish_sync_safekeepers, lsn={}", lsn);
510 347 : executor::exit(0, Lsn(lsn).to_string());
511 347 : }
512 :
513 94558 : fn log_internal(&self, _wp: &mut walproposer::bindings::WalProposer, level: Level, msg: &str) {
514 94558 : debug!("wp_log[{}] {}", level, msg);
515 94558 : if level == Level::Fatal || level == Level::Panic {
516 66 : if msg.contains("rejects our connection request with term") {
517 29 : // collected quorum with lower term, then got rejected by next connected safekeeper
518 29 : executor::exit(1, msg.to_owned());
519 37 : }
520 66 : if msg.contains("collected propEpochStartLsn") && msg.contains(", but basebackup LSN ")
521 3 : {
522 3 : // sync-safekeepers collected wrong quorum, walproposer collected another quorum
523 3 : executor::exit(1, msg.to_owned());
524 63 : }
525 66 : if msg.contains("failed to download WAL for logical replicaiton") {
526 19 : // Recovery connection broken and recovery was failed
527 19 : executor::exit(1, msg.to_owned());
528 47 : }
529 66 : if msg.contains("missing majority of votes, collected") {
530 15 : // Voting bug when safekeeper disconnects after voting
531 15 : executor::exit(1, msg.to_owned());
532 51 : }
533 66 : panic!("unknown FATAL error from walproposer: {}", msg);
534 94492 : }
535 94492 : }
536 :
537 800 : fn after_election(&self, wp: &mut walproposer::bindings::WalProposer) {
538 800 : let prop_lsn = wp.propEpochStartLsn;
539 800 : let prop_term = wp.propTerm;
540 800 :
541 800 : let mut prev_lsn: u64 = 0;
542 800 : let mut prev_term: u64 = 0;
543 800 :
544 800 : unsafe {
545 800 : let history = wp.propTermHistory.entries;
546 800 : let len = wp.propTermHistory.n_entries as usize;
547 800 : if len > 1 {
548 559 : let entry = *history.wrapping_add(len - 2);
549 559 : prev_lsn = entry.lsn;
550 559 : prev_term = entry.term;
551 559 : }
552 : }
553 :
554 800 : let msg = format!(
555 800 : "prop_elected;{};{};{};{}",
556 800 : prop_lsn, prop_term, prev_lsn, prev_term
557 800 : );
558 800 :
559 800 : debug!(msg);
560 800 : self.os.log_event(msg);
561 800 : }
562 :
563 301 : fn get_redo_start_lsn(&self) -> u64 {
564 301 : debug!("get_redo_start_lsn -> {:?}", self.redo_start_lsn);
565 301 : self.redo_start_lsn.expect("redo_start_lsn is not set").0
566 301 : }
567 :
568 2714 : fn get_shmem_state(&self) -> *mut walproposer::bindings::WalproposerShmemState {
569 2714 : self.shmem.get()
570 2714 : }
571 :
572 171 : fn start_streaming(
573 171 : &self,
574 171 : startpos: u64,
575 171 : callback: &walproposer::walproposer::StreamingCallback,
576 171 : ) {
577 171 : let disk = &self.disk;
578 171 : let disk_lsn = disk.lock().flush_rec_ptr().0;
579 171 : debug!("start_streaming at {} (disk_lsn={})", startpos, disk_lsn);
580 171 : if startpos < disk_lsn {
581 56 : debug!("startpos < disk_lsn, it means we wrote some transaction even before streaming started");
582 115 : }
583 171 : assert!(startpos <= disk_lsn);
584 171 : let mut broadcasted = Lsn(startpos);
585 :
586 : loop {
587 698 : let available = disk.lock().flush_rec_ptr();
588 698 : assert!(available >= broadcasted);
589 527 : callback.broadcast(broadcasted, available);
590 527 : broadcasted = available;
591 527 : callback.poll();
592 : }
593 : }
594 :
595 2394 : fn process_safekeeper_feedback(
596 2394 : &mut self,
597 2394 : wp: &mut walproposer::bindings::WalProposer,
598 2394 : _sk: &mut walproposer::bindings::Safekeeper,
599 2394 : ) {
600 2394 : debug!("process_safekeeper_feedback, commit_lsn={}", wp.commitLsn);
601 2394 : if wp.commitLsn > self.last_logged_commit_lsn {
602 544 : self.os.log_event(format!("commit_lsn;{}", wp.commitLsn));
603 544 : self.last_logged_commit_lsn = wp.commitLsn;
604 1850 : }
605 2394 : }
606 :
607 97 : fn get_flush_rec_ptr(&self) -> u64 {
608 97 : let lsn = self.disk.lock().flush_rec_ptr();
609 97 : debug!("get_flush_rec_ptr: {}", lsn);
610 97 : lsn.0
611 97 : }
612 :
613 800 : fn recovery_download(
614 800 : &self,
615 800 : wp: &mut walproposer::bindings::WalProposer,
616 800 : sk: &mut walproposer::bindings::Safekeeper,
617 800 : ) -> bool {
618 800 : let mut startpos = wp.truncateLsn;
619 800 : let endpos = wp.propEpochStartLsn;
620 800 :
621 800 : if startpos == endpos {
622 438 : debug!("recovery_download: nothing to download");
623 438 : return true;
624 362 : }
625 362 :
626 362 : debug!("recovery_download from {} to {}", startpos, endpos,);
627 :
628 362 : let replication_prompt = format!(
629 362 : "START_REPLICATION {} {} {} {}",
630 362 : self.config.ttid.tenant_id, self.config.ttid.timeline_id, startpos, endpos,
631 362 : );
632 362 : let async_conn = self.get_conn(sk);
633 362 :
634 362 : let conn = self.os.open_tcp(async_conn.node_id);
635 362 : conn.send(desim::proto::AnyMessage::Bytes(replication_prompt.into()));
636 362 :
637 362 : let chan = conn.recv_chan();
638 619 : while startpos < endpos {
639 362 : let event = chan.recv();
640 343 : match event {
641 : NetEvent::Closed => {
642 19 : debug!("connection closed in recovery");
643 19 : break;
644 : }
645 343 : NetEvent::Message(AnyMessage::Bytes(b)) => {
646 343 : debug!("got recovery bytes from safekeeper");
647 257 : self.disk.lock().write(startpos, &b);
648 257 : startpos += b.len() as u64;
649 : }
650 0 : NetEvent::Message(_) => unreachable!(),
651 : }
652 : }
653 :
654 276 : debug!("recovery finished at {}", startpos);
655 :
656 276 : startpos == endpos
657 714 : }
658 :
659 11532 : fn conn_finish(&self, sk: &mut walproposer::bindings::Safekeeper) {
660 11532 : let mut conn = self.get_conn(sk);
661 11532 : debug!("conn_finish to {}", conn.node_id);
662 11532 : if let Some(socket) = conn.socket.as_mut() {
663 3759 : socket.close();
664 7773 : } else {
665 7773 : // connection is already closed
666 7773 : }
667 11532 : conn.socket = None;
668 11532 : }
669 :
670 11282 : fn conn_error_message(&self, _sk: &mut walproposer::bindings::Safekeeper) -> String {
671 11282 : "connection is closed, probably".into()
672 11282 : }
673 : }
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