Line data Source code
1 : use std::cell::{RefCell, RefMut, UnsafeCell};
2 : use std::ffi::CStr;
3 : use std::sync::Arc;
4 :
5 : use bytes::Bytes;
6 : use desim::executor::{self, PollSome};
7 : use desim::network::TCP;
8 : use desim::node_os::NodeOs;
9 : use desim::proto::{AnyMessage, NetEvent, NodeEvent};
10 : use desim::world::NodeId;
11 : use tracing::debug;
12 : use utils::lsn::Lsn;
13 : use walproposer::api_bindings::Level;
14 : use walproposer::bindings::{
15 : NeonWALReadResult, SafekeeperStateDesiredEvents, WL_SOCKET_READABLE, WL_SOCKET_WRITEABLE,
16 : };
17 : use walproposer::walproposer::{ApiImpl, Config};
18 :
19 : use super::walproposer_disk::DiskWalProposer;
20 :
21 : /// Special state for each wp->sk connection.
22 : struct SafekeeperConn {
23 : host: String,
24 : port: String,
25 : node_id: NodeId,
26 : // socket is Some(..) equals to connection is established
27 : socket: Option<TCP>,
28 : // connection is in progress
29 : is_connecting: bool,
30 : // START_WAL_PUSH is in progress
31 : is_start_wal_push: bool,
32 : // pointer to Safekeeper in walproposer for callbacks
33 : raw_ptr: *mut walproposer::bindings::Safekeeper,
34 : }
35 :
36 : impl SafekeeperConn {
37 27081 : pub fn new(host: String, port: String) -> Self {
38 : // port number is the same as NodeId
39 27081 : let port_num = port.parse::<u32>().unwrap();
40 27081 : Self {
41 27081 : host,
42 27081 : port,
43 27081 : node_id: port_num,
44 27081 : socket: None,
45 27081 : is_connecting: false,
46 27081 : is_start_wal_push: false,
47 27081 : raw_ptr: std::ptr::null_mut(),
48 27081 : }
49 27081 : }
50 : }
51 :
52 : /// Simulation version of a postgres WaitEventSet. At pos 0 there is always
53 : /// a special NodeEvents channel, which is used as a latch.
54 : struct EventSet {
55 : os: NodeOs,
56 : // all pollable channels, 0 is always NodeEvent channel
57 : chans: Vec<Box<dyn PollSome>>,
58 : // 0 is always nullptr
59 : sk_ptrs: Vec<*mut walproposer::bindings::Safekeeper>,
60 : // event mask for each channel
61 : masks: Vec<u32>,
62 : }
63 :
64 : impl EventSet {
65 9027 : pub fn new(os: NodeOs) -> Self {
66 9027 : let node_events = os.node_events();
67 9027 : Self {
68 9027 : os,
69 9027 : chans: vec![Box::new(node_events)],
70 9027 : sk_ptrs: vec![std::ptr::null_mut()],
71 9027 : masks: vec![WL_SOCKET_READABLE],
72 9027 : }
73 9027 : }
74 :
75 : /// Leaves all readable channels at the beginning of the array.
76 29022 : fn sort_readable(&mut self) -> usize {
77 29022 : let mut cnt = 1;
78 68365 : for i in 1..self.chans.len() {
79 68365 : if self.masks[i] & WL_SOCKET_READABLE != 0 {
80 68365 : self.chans.swap(i, cnt);
81 68365 : self.sk_ptrs.swap(i, cnt);
82 68365 : self.masks.swap(i, cnt);
83 68365 : cnt += 1;
84 68365 : }
85 : }
86 29022 : cnt
87 29022 : }
88 :
89 66254 : fn update_event_set(&mut self, conn: &SafekeeperConn, event_mask: u32) {
90 66254 : let index = self
91 66254 : .sk_ptrs
92 66254 : .iter()
93 250390 : .position(|&ptr| ptr == conn.raw_ptr)
94 66254 : .expect("safekeeper should exist in event set");
95 66254 : self.masks[index] = event_mask;
96 66254 : }
97 :
98 60690 : fn add_safekeeper(&mut self, sk: &SafekeeperConn, event_mask: u32) {
99 146585 : for ptr in self.sk_ptrs.iter() {
100 146585 : assert!(*ptr != sk.raw_ptr);
101 : }
102 :
103 60690 : self.chans.push(Box::new(
104 60690 : sk.socket
105 60690 : .as_ref()
106 60690 : .expect("socket should not be closed")
107 60690 : .recv_chan(),
108 60690 : ));
109 60690 : self.sk_ptrs.push(sk.raw_ptr);
110 60690 : self.masks.push(event_mask);
111 60690 : }
112 :
113 38922 : fn remove_safekeeper(&mut self, sk: &SafekeeperConn) {
114 82791 : let index = self.sk_ptrs.iter().position(|&ptr| ptr == sk.raw_ptr);
115 38922 : if index.is_none() {
116 5 : debug!("remove_safekeeper: sk={:?} not found", sk.raw_ptr);
117 5 : return;
118 38917 : }
119 38917 : let index = index.unwrap();
120 :
121 38917 : self.chans.remove(index);
122 38917 : self.sk_ptrs.remove(index);
123 38917 : self.masks.remove(index);
124 :
125 : // to simulate the actual behaviour
126 38917 : self.refresh_event_set();
127 38922 : }
128 :
129 : /// Updates all masks to match the result of a SafekeeperStateDesiredEvents.
130 45405 : fn refresh_event_set(&mut self) {
131 129591 : for (i, mask) in self.masks.iter_mut().enumerate() {
132 129591 : if i == 0 {
133 45405 : continue;
134 84186 : }
135 :
136 84186 : let mut mask_sk: u32 = 0;
137 84186 : let mut mask_nwr: u32 = 0;
138 84186 : unsafe { SafekeeperStateDesiredEvents(self.sk_ptrs[i], &mut mask_sk, &mut mask_nwr) };
139 :
140 84186 : if mask_sk != *mask {
141 0 : debug!(
142 0 : "refresh_event_set: sk={:?}, old_mask={:#b}, new_mask={:#b}",
143 0 : self.sk_ptrs[i], *mask, mask_sk
144 : );
145 0 : *mask = mask_sk;
146 84186 : }
147 : }
148 45405 : }
149 :
150 : /// Wait for events on all channels.
151 29022 : fn wait(&mut self, timeout_millis: i64) -> walproposer::walproposer::WaitResult {
152 : // all channels are always writeable
153 97387 : for (i, mask) in self.masks.iter().enumerate() {
154 97387 : if *mask & WL_SOCKET_WRITEABLE != 0 {
155 0 : return walproposer::walproposer::WaitResult::Network(
156 0 : self.sk_ptrs[i],
157 0 : WL_SOCKET_WRITEABLE,
158 0 : );
159 97387 : }
160 : }
161 :
162 29022 : let cnt = self.sort_readable();
163 :
164 29022 : let slice = &self.chans[0..cnt];
165 29022 : match executor::epoll_chans(slice, timeout_millis) {
166 11264 : None => walproposer::walproposer::WaitResult::Timeout,
167 : Some(0) => {
168 530 : let msg = self.os.node_events().must_recv();
169 530 : match msg {
170 530 : NodeEvent::Internal(AnyMessage::Just32(0)) => {
171 530 : // got a notification about new WAL available
172 530 : }
173 0 : NodeEvent::Internal(_) => unreachable!(),
174 0 : NodeEvent::Accept(_) => unreachable!(),
175 : }
176 530 : walproposer::walproposer::WaitResult::Latch
177 : }
178 17228 : Some(index) => walproposer::walproposer::WaitResult::Network(
179 17228 : self.sk_ptrs[index],
180 17228 : WL_SOCKET_READABLE,
181 17228 : ),
182 : }
183 29022 : }
184 : }
185 :
186 : /// This struct handles all calls from walproposer into walproposer_api.
187 : pub struct SimulationApi {
188 : os: NodeOs,
189 : safekeepers: RefCell<Vec<SafekeeperConn>>,
190 : disk: Arc<DiskWalProposer>,
191 : redo_start_lsn: Option<Lsn>,
192 : last_logged_commit_lsn: u64,
193 : shmem: UnsafeCell<walproposer::bindings::WalproposerShmemState>,
194 : config: Config,
195 : event_set: RefCell<Option<EventSet>>,
196 : }
197 :
198 : pub struct Args {
199 : pub os: NodeOs,
200 : pub config: Config,
201 : pub disk: Arc<DiskWalProposer>,
202 : pub redo_start_lsn: Option<Lsn>,
203 : }
204 :
205 : impl SimulationApi {
206 9027 : pub fn new(args: Args) -> Self {
207 : // initialize connection state for each safekeeper
208 9027 : let sk_conns = args
209 9027 : .config
210 9027 : .safekeepers_list
211 9027 : .iter()
212 27081 : .map(|s| {
213 27081 : SafekeeperConn::new(
214 27081 : s.split(':').next().unwrap().to_string(),
215 27081 : s.split(':').nth(1).unwrap().to_string(),
216 : )
217 27081 : })
218 9027 : .collect::<Vec<_>>();
219 :
220 9027 : Self {
221 9027 : os: args.os,
222 9027 : safekeepers: RefCell::new(sk_conns),
223 9027 : disk: args.disk,
224 9027 : redo_start_lsn: args.redo_start_lsn,
225 9027 : last_logged_commit_lsn: 0,
226 9027 : shmem: UnsafeCell::new(walproposer::api_bindings::empty_shmem()),
227 9027 : config: args.config,
228 9027 : event_set: RefCell::new(None),
229 9027 : }
230 9027 : }
231 :
232 : /// Get SafekeeperConn for the given Safekeeper.
233 300463 : fn get_conn(&self, sk: &mut walproposer::bindings::Safekeeper) -> RefMut<'_, SafekeeperConn> {
234 300463 : let sk_port = unsafe { CStr::from_ptr(sk.port).to_str().unwrap() };
235 300463 : let state = self.safekeepers.borrow_mut();
236 300463 : RefMut::map(state, |v| {
237 300463 : v.iter_mut()
238 600846 : .find(|conn| conn.port == sk_port)
239 300463 : .expect("safekeeper conn not found by port")
240 300463 : })
241 300463 : }
242 : }
243 :
244 : impl ApiImpl for SimulationApi {
245 321869 : fn get_current_timestamp(&self) -> i64 {
246 321869 : debug!("get_current_timestamp");
247 : // PG TimestampTZ is microseconds, but simulation unit is assumed to be
248 : // milliseconds, so add 10^3
249 321869 : self.os.now() as i64 * 1000
250 321869 : }
251 :
252 919 : fn update_donor(&self, donor: &mut walproposer::bindings::Safekeeper, donor_lsn: u64) {
253 919 : let mut shmem = unsafe { *self.get_shmem_state() };
254 919 : shmem.propEpochStartLsn.value = donor_lsn;
255 919 : shmem.donor_conninfo = donor.conninfo;
256 919 : }
257 :
258 33705 : fn conn_status(
259 33705 : &self,
260 33705 : _: &mut walproposer::bindings::Safekeeper,
261 33705 : ) -> walproposer::bindings::WalProposerConnStatusType {
262 33705 : debug!("conn_status");
263 : // break the connection with a 10% chance
264 33705 : if self.os.random(100) < 10 {
265 3360 : walproposer::bindings::WalProposerConnStatusType_WP_CONNECTION_BAD
266 : } else {
267 30345 : walproposer::bindings::WalProposerConnStatusType_WP_CONNECTION_OK
268 : }
269 33705 : }
270 :
271 33705 : fn conn_connect_start(&self, sk: &mut walproposer::bindings::Safekeeper) {
272 33705 : debug!("conn_connect_start");
273 33705 : let mut conn = self.get_conn(sk);
274 :
275 33705 : assert!(conn.socket.is_none());
276 33705 : let socket = self.os.open_tcp(conn.node_id);
277 33705 : conn.socket = Some(socket);
278 33705 : conn.raw_ptr = sk;
279 33705 : conn.is_connecting = true;
280 33705 : }
281 :
282 30345 : fn conn_connect_poll(
283 30345 : &self,
284 30345 : _: &mut walproposer::bindings::Safekeeper,
285 30345 : ) -> walproposer::bindings::WalProposerConnectPollStatusType {
286 30345 : debug!("conn_connect_poll");
287 : // TODO: break the connection here
288 30345 : walproposer::bindings::WalProposerConnectPollStatusType_WP_CONN_POLLING_OK
289 30345 : }
290 :
291 30345 : fn conn_send_query(&self, sk: &mut walproposer::bindings::Safekeeper, query: &str) -> bool {
292 30345 : debug!("conn_send_query: {}", query);
293 30345 : self.get_conn(sk).is_start_wal_push = true;
294 30345 : true
295 30345 : }
296 :
297 30345 : fn conn_get_query_result(
298 30345 : &self,
299 30345 : _: &mut walproposer::bindings::Safekeeper,
300 30345 : ) -> walproposer::bindings::WalProposerExecStatusType {
301 30345 : debug!("conn_get_query_result");
302 : // TODO: break the connection here
303 30345 : walproposer::bindings::WalProposerExecStatusType_WP_EXEC_SUCCESS_COPYBOTH
304 30345 : }
305 :
306 19321 : fn conn_async_read(
307 19321 : &self,
308 19321 : sk: &mut walproposer::bindings::Safekeeper,
309 19321 : vec: &mut Vec<u8>,
310 19321 : ) -> walproposer::bindings::PGAsyncReadResult {
311 19321 : debug!("conn_async_read");
312 19321 : let mut conn = self.get_conn(sk);
313 :
314 19321 : let socket = if let Some(socket) = conn.socket.as_mut() {
315 19321 : socket
316 : } else {
317 : // socket is already closed
318 0 : return walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_FAIL;
319 : };
320 :
321 19321 : let msg = socket.recv_chan().try_recv();
322 :
323 17007 : match msg {
324 : None => {
325 : // no message is ready
326 2314 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_TRY_AGAIN
327 : }
328 : Some(NetEvent::Closed) => {
329 : // connection is closed
330 8202 : debug!("conn_async_read: connection is closed");
331 8202 : conn.socket = None;
332 8202 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_FAIL
333 : }
334 8805 : Some(NetEvent::Message(msg)) => {
335 : // got a message
336 8805 : let b = match msg {
337 8805 : desim::proto::AnyMessage::Bytes(b) => b,
338 0 : _ => unreachable!(),
339 : };
340 8805 : vec.extend_from_slice(&b);
341 8805 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_SUCCESS
342 : }
343 : }
344 19321 : }
345 :
346 33905 : fn conn_blocking_write(&self, sk: &mut walproposer::bindings::Safekeeper, buf: &[u8]) -> bool {
347 33905 : let mut conn = self.get_conn(sk);
348 33905 : debug!("conn_blocking_write to {}: {:?}", conn.node_id, buf);
349 33905 : let socket = conn.socket.as_mut().unwrap();
350 33905 : socket.send(desim::proto::AnyMessage::Bytes(Bytes::copy_from_slice(buf)));
351 33905 : true
352 33905 : }
353 :
354 5097 : fn conn_async_write(
355 5097 : &self,
356 5097 : sk: &mut walproposer::bindings::Safekeeper,
357 5097 : buf: &[u8],
358 5097 : ) -> walproposer::bindings::PGAsyncWriteResult {
359 5097 : let mut conn = self.get_conn(sk);
360 5097 : debug!("conn_async_write to {}: {:?}", conn.node_id, buf);
361 5097 : if let Some(socket) = conn.socket.as_mut() {
362 5097 : socket.send(desim::proto::AnyMessage::Bytes(Bytes::copy_from_slice(buf)));
363 5097 : } else {
364 : // connection is already closed
365 0 : debug!("conn_async_write: writing to a closed socket!");
366 : // TODO: maybe we should return error here?
367 : }
368 5097 : walproposer::bindings::PGAsyncWriteResult_PG_ASYNC_WRITE_SUCCESS
369 5097 : }
370 :
371 923 : fn wal_reader_allocate(&self, _: &mut walproposer::bindings::Safekeeper) -> NeonWALReadResult {
372 923 : debug!("wal_reader_allocate");
373 923 : walproposer::bindings::NeonWALReadResult_NEON_WALREAD_SUCCESS
374 923 : }
375 :
376 1087 : fn wal_read(
377 1087 : &self,
378 1087 : _sk: &mut walproposer::bindings::Safekeeper,
379 1087 : buf: &mut [u8],
380 1087 : startpos: u64,
381 1087 : ) -> NeonWALReadResult {
382 1087 : self.disk.lock().read(startpos, buf);
383 1087 : walproposer::bindings::NeonWALReadResult_NEON_WALREAD_SUCCESS
384 1087 : }
385 :
386 9027 : fn init_event_set(&self, _: &mut walproposer::bindings::WalProposer) {
387 9027 : debug!("init_event_set");
388 9027 : let new_event_set = EventSet::new(self.os.clone());
389 9027 : let old_event_set = self.event_set.replace(Some(new_event_set));
390 9027 : assert!(old_event_set.is_none());
391 9027 : }
392 :
393 66254 : fn update_event_set(&self, sk: &mut walproposer::bindings::Safekeeper, event_mask: u32) {
394 66254 : debug!(
395 0 : "update_event_set, sk={:?}, events_mask={:#b}",
396 0 : sk as *mut walproposer::bindings::Safekeeper, event_mask
397 : );
398 66254 : let conn = self.get_conn(sk);
399 :
400 66254 : self.event_set
401 66254 : .borrow_mut()
402 66254 : .as_mut()
403 66254 : .unwrap()
404 66254 : .update_event_set(&conn, event_mask);
405 66254 : }
406 :
407 60690 : fn add_safekeeper_event_set(
408 60690 : &self,
409 60690 : sk: &mut walproposer::bindings::Safekeeper,
410 60690 : event_mask: u32,
411 60690 : ) {
412 60690 : debug!(
413 0 : "add_safekeeper_event_set, sk={:?}, events_mask={:#b}",
414 0 : sk as *mut walproposer::bindings::Safekeeper, event_mask
415 : );
416 :
417 60690 : self.event_set
418 60690 : .borrow_mut()
419 60690 : .as_mut()
420 60690 : .unwrap()
421 60690 : .add_safekeeper(&self.get_conn(sk), event_mask);
422 60690 : }
423 :
424 38922 : fn rm_safekeeper_event_set(&self, sk: &mut walproposer::bindings::Safekeeper) {
425 38922 : debug!(
426 0 : "rm_safekeeper_event_set, sk={:?}",
427 0 : sk as *mut walproposer::bindings::Safekeeper,
428 : );
429 :
430 38922 : self.event_set
431 38922 : .borrow_mut()
432 38922 : .as_mut()
433 38922 : .unwrap()
434 38922 : .remove_safekeeper(&self.get_conn(sk));
435 38922 : }
436 :
437 6488 : fn active_state_update_event_set(&self, sk: &mut walproposer::bindings::Safekeeper) {
438 6488 : debug!("active_state_update_event_set");
439 :
440 6488 : assert!(sk.state == walproposer::bindings::SafekeeperState_SS_ACTIVE);
441 6488 : self.event_set
442 6488 : .borrow_mut()
443 6488 : .as_mut()
444 6488 : .unwrap()
445 6488 : .refresh_event_set();
446 6488 : }
447 :
448 19937 : fn wal_reader_events(&self, _sk: &mut walproposer::bindings::Safekeeper) -> u32 {
449 19937 : 0
450 19937 : }
451 :
452 89712 : fn wait_event_set(
453 89712 : &self,
454 89712 : _: &mut walproposer::bindings::WalProposer,
455 89712 : timeout_millis: i64,
456 89712 : ) -> walproposer::walproposer::WaitResult {
457 : // TODO: handle multiple stages as part of the simulation (e.g. connect, start_wal_push, etc)
458 89712 : let mut conns = self.safekeepers.borrow_mut();
459 208448 : for conn in conns.iter_mut() {
460 208448 : if conn.socket.is_some() && conn.is_connecting {
461 30345 : conn.is_connecting = false;
462 30345 : debug!("wait_event_set, connecting to {}:{}", conn.host, conn.port);
463 30345 : return walproposer::walproposer::WaitResult::Network(
464 30345 : conn.raw_ptr,
465 30345 : WL_SOCKET_READABLE | WL_SOCKET_WRITEABLE,
466 30345 : );
467 178103 : }
468 178103 : if conn.socket.is_some() && conn.is_start_wal_push {
469 30345 : conn.is_start_wal_push = false;
470 30345 : debug!(
471 0 : "wait_event_set, start wal push to {}:{}",
472 : conn.host, conn.port
473 : );
474 30345 : return walproposer::walproposer::WaitResult::Network(
475 30345 : conn.raw_ptr,
476 30345 : WL_SOCKET_READABLE,
477 30345 : );
478 147758 : }
479 : }
480 29022 : drop(conns);
481 :
482 29022 : let res = self
483 29022 : .event_set
484 29022 : .borrow_mut()
485 29022 : .as_mut()
486 29022 : .unwrap()
487 29022 : .wait(timeout_millis);
488 :
489 29022 : debug!(
490 0 : "wait_event_set, timeout_millis={}, res={:?}",
491 : timeout_millis, res,
492 : );
493 29022 : res
494 89712 : }
495 :
496 0 : fn strong_random(&self, buf: &mut [u8]) -> bool {
497 0 : debug!("strong_random");
498 0 : buf.fill(0);
499 0 : true
500 0 : }
501 :
502 335 : fn finish_sync_safekeepers(&self, lsn: u64) -> ! {
503 335 : debug!("finish_sync_safekeepers, lsn={}", lsn);
504 335 : executor::exit(0, Lsn(lsn).to_string());
505 : }
506 :
507 152061 : fn log_internal(&self, _wp: &mut walproposer::bindings::WalProposer, level: Level, msg: &str) {
508 152061 : debug!("wp_log[{}] {}", level, msg);
509 152061 : if level == Level::Fatal || level == Level::Panic {
510 86 : if msg.contains("rejects our connection request with term") {
511 : // collected quorum with lower term, then got rejected by next connected safekeeper
512 53 : executor::exit(1, msg.to_owned());
513 33 : }
514 33 : if msg.contains("collected propTermStartLsn") && msg.contains(", but basebackup LSN ") {
515 : // sync-safekeepers collected wrong quorum, walproposer collected another quorum
516 2 : executor::exit(1, msg.to_owned());
517 31 : }
518 31 : if msg.contains("failed to download WAL for logical replicaiton") {
519 : // Recovery connection broken and recovery was failed
520 31 : executor::exit(1, msg.to_owned());
521 0 : }
522 0 : if msg.contains("missing majority of votes, collected") {
523 : // Voting bug when safekeeper disconnects after voting
524 0 : executor::exit(1, msg.to_owned());
525 0 : }
526 0 : panic!("unknown FATAL error from walproposer: {msg}");
527 151975 : }
528 151975 : }
529 :
530 526 : fn after_election(&self, wp: &mut walproposer::bindings::WalProposer) {
531 526 : let prop_lsn = wp.propTermStartLsn;
532 526 : let prop_term = wp.propTerm;
533 :
534 526 : let mut prev_lsn: u64 = 0;
535 526 : let mut prev_term: u64 = 0;
536 :
537 : unsafe {
538 526 : let history = wp.propTermHistory.entries;
539 526 : let len = wp.propTermHistory.n_entries as usize;
540 526 : if len > 1 {
541 473 : let entry = *history.wrapping_add(len - 2);
542 473 : prev_lsn = entry.lsn;
543 473 : prev_term = entry.term;
544 473 : }
545 : }
546 :
547 526 : let msg = format!("prop_elected;{prop_lsn};{prop_term};{prev_lsn};{prev_term}");
548 :
549 526 : debug!(msg);
550 526 : self.os.log_event(msg);
551 526 : }
552 :
553 212 : fn get_redo_start_lsn(&self) -> u64 {
554 212 : debug!("get_redo_start_lsn -> {:?}", self.redo_start_lsn);
555 212 : self.redo_start_lsn.expect("redo_start_lsn is not set").0
556 212 : }
557 :
558 1975 : fn get_shmem_state(&self) -> *mut walproposer::bindings::WalproposerShmemState {
559 1975 : self.shmem.get()
560 1975 : }
561 :
562 152 : fn start_streaming(
563 152 : &self,
564 152 : startpos: u64,
565 152 : callback: &walproposer::walproposer::StreamingCallback,
566 152 : ) {
567 152 : let disk = &self.disk;
568 152 : let disk_lsn = disk.lock().flush_rec_ptr().0;
569 152 : debug!("start_streaming at {} (disk_lsn={})", startpos, disk_lsn);
570 152 : if startpos < disk_lsn {
571 46 : debug!(
572 0 : "startpos < disk_lsn, it means we wrote some transaction even before streaming started"
573 : );
574 106 : }
575 152 : assert!(startpos <= disk_lsn);
576 152 : let mut broadcasted = Lsn(startpos);
577 :
578 : loop {
579 498 : let available = disk.lock().flush_rec_ptr();
580 498 : assert!(available >= broadcasted);
581 346 : callback.broadcast(broadcasted, available);
582 346 : broadcasted = available;
583 346 : callback.poll();
584 : }
585 : }
586 :
587 2519 : fn process_safekeeper_feedback(
588 2519 : &mut self,
589 2519 : wp: &mut walproposer::bindings::WalProposer,
590 2519 : _sk: &mut walproposer::bindings::Safekeeper,
591 2519 : ) {
592 2519 : debug!("process_safekeeper_feedback, commit_lsn={}", wp.commitLsn);
593 2519 : if wp.commitLsn > self.last_logged_commit_lsn {
594 497 : self.os.log_event(format!("commit_lsn;{}", wp.commitLsn));
595 497 : self.last_logged_commit_lsn = wp.commitLsn;
596 2022 : }
597 2519 : }
598 :
599 86 : fn get_flush_rec_ptr(&self) -> u64 {
600 86 : let lsn = self.disk.lock().flush_rec_ptr();
601 86 : debug!("get_flush_rec_ptr: {}", lsn);
602 86 : lsn.0
603 86 : }
604 :
605 526 : fn recovery_download(
606 526 : &self,
607 526 : wp: &mut walproposer::bindings::WalProposer,
608 526 : sk: &mut walproposer::bindings::Safekeeper,
609 526 : ) -> bool {
610 526 : let mut startpos = wp.truncateLsn;
611 526 : let endpos = wp.propTermStartLsn;
612 :
613 526 : if startpos == endpos {
614 239 : debug!("recovery_download: nothing to download");
615 239 : return true;
616 287 : }
617 :
618 287 : debug!("recovery_download from {} to {}", startpos, endpos,);
619 :
620 287 : let replication_prompt = format!(
621 287 : "START_REPLICATION {} {} {} {}",
622 : self.config.ttid.tenant_id, self.config.ttid.timeline_id, startpos, endpos,
623 : );
624 287 : let async_conn = self.get_conn(sk);
625 :
626 287 : let conn = self.os.open_tcp(async_conn.node_id);
627 287 : conn.send(desim::proto::AnyMessage::Bytes(replication_prompt.into()));
628 :
629 287 : let chan = conn.recv_chan();
630 481 : while startpos < endpos {
631 287 : let event = chan.recv();
632 256 : match event {
633 : NetEvent::Closed => {
634 31 : debug!("connection closed in recovery");
635 31 : break;
636 : }
637 194 : NetEvent::Message(AnyMessage::Bytes(b)) => {
638 194 : debug!("got recovery bytes from safekeeper");
639 194 : self.disk.lock().write(startpos, &b);
640 194 : startpos += b.len() as u64;
641 : }
642 62 : NetEvent::Message(_) => unreachable!(),
643 : }
644 : }
645 :
646 225 : debug!("recovery finished at {}", startpos);
647 :
648 225 : startpos == endpos
649 464 : }
650 :
651 11937 : fn conn_finish(&self, sk: &mut walproposer::bindings::Safekeeper) {
652 11937 : let mut conn = self.get_conn(sk);
653 11937 : debug!("conn_finish to {}", conn.node_id);
654 11937 : if let Some(socket) = conn.socket.as_mut() {
655 3730 : socket.close();
656 8207 : } else {
657 8207 : // connection is already closed
658 8207 : }
659 11937 : conn.socket = None;
660 11937 : }
661 :
662 11562 : fn conn_error_message(&self, _sk: &mut walproposer::bindings::Safekeeper) -> String {
663 11562 : "connection is closed, probably".into()
664 11562 : }
665 : }
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