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 28029 : pub fn new(host: String, port: String) -> Self {
38 : // port number is the same as NodeId
39 28029 : let port_num = port.parse::<u32>().unwrap();
40 28029 : Self {
41 28029 : host,
42 28029 : port,
43 28029 : node_id: port_num,
44 28029 : socket: None,
45 28029 : is_connecting: false,
46 28029 : is_start_wal_push: false,
47 28029 : raw_ptr: std::ptr::null_mut(),
48 28029 : }
49 28029 : }
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 9343 : pub fn new(os: NodeOs) -> Self {
66 9343 : let node_events = os.node_events();
67 9343 : Self {
68 9343 : os,
69 9343 : chans: vec![Box::new(node_events)],
70 9343 : sk_ptrs: vec![std::ptr::null_mut()],
71 9343 : masks: vec![WL_SOCKET_READABLE],
72 9343 : }
73 9343 : }
74 :
75 : /// Leaves all readable channels at the beginning of the array.
76 29432 : fn sort_readable(&mut self) -> usize {
77 29432 : let mut cnt = 1;
78 68322 : for i in 1..self.chans.len() {
79 68322 : if self.masks[i] & WL_SOCKET_READABLE != 0 {
80 68322 : self.chans.swap(i, cnt);
81 68322 : self.sk_ptrs.swap(i, cnt);
82 68322 : self.masks.swap(i, cnt);
83 68322 : cnt += 1;
84 68322 : }
85 : }
86 29432 : cnt
87 29432 : }
88 :
89 67899 : fn update_event_set(&mut self, conn: &SafekeeperConn, event_mask: u32) {
90 67899 : let index = self
91 67899 : .sk_ptrs
92 67899 : .iter()
93 257217 : .position(|&ptr| ptr == conn.raw_ptr)
94 67899 : .expect("safekeeper should exist in event set");
95 67899 : self.masks[index] = event_mask;
96 67899 : }
97 :
98 62786 : fn add_safekeeper(&mut self, sk: &SafekeeperConn, event_mask: u32) {
99 151679 : for ptr in self.sk_ptrs.iter() {
100 151679 : assert!(*ptr != sk.raw_ptr);
101 : }
102 :
103 62786 : self.chans.push(Box::new(
104 62786 : sk.socket
105 62786 : .as_ref()
106 62786 : .expect("socket should not be closed")
107 62786 : .recv_chan(),
108 62786 : ));
109 62786 : self.sk_ptrs.push(sk.raw_ptr);
110 62786 : self.masks.push(event_mask);
111 62786 : }
112 :
113 40489 : fn remove_safekeeper(&mut self, sk: &SafekeeperConn) {
114 86042 : let index = self.sk_ptrs.iter().position(|&ptr| ptr == sk.raw_ptr);
115 40489 : if index.is_none() {
116 5 : debug!("remove_safekeeper: sk={:?} not found", sk.raw_ptr);
117 5 : return;
118 40484 : }
119 40484 : let index = index.unwrap();
120 :
121 40484 : self.chans.remove(index);
122 40484 : self.sk_ptrs.remove(index);
123 40484 : self.masks.remove(index);
124 :
125 : // to simulate the actual behaviour
126 40484 : self.refresh_event_set();
127 40489 : }
128 :
129 : /// Updates all masks to match the result of a SafekeeperStateDesiredEvents.
130 46610 : fn refresh_event_set(&mut self) {
131 131971 : for (i, mask) in self.masks.iter_mut().enumerate() {
132 131971 : if i == 0 {
133 46610 : continue;
134 85361 : }
135 :
136 85361 : let mut mask_sk: u32 = 0;
137 85361 : let mut mask_nwr: u32 = 0;
138 85361 : unsafe { SafekeeperStateDesiredEvents(self.sk_ptrs[i], &mut mask_sk, &mut mask_nwr) };
139 :
140 85361 : 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 85361 : }
147 : }
148 46610 : }
149 :
150 : /// Wait for events on all channels.
151 29432 : fn wait(&mut self, timeout_millis: i64) -> walproposer::walproposer::WaitResult {
152 : // all channels are always writeable
153 97754 : for (i, mask) in self.masks.iter().enumerate() {
154 97754 : 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 97754 : }
160 : }
161 :
162 29432 : let cnt = self.sort_readable();
163 :
164 29432 : let slice = &self.chans[0..cnt];
165 29432 : match executor::epoll_chans(slice, timeout_millis) {
166 11791 : None => walproposer::walproposer::WaitResult::Timeout,
167 : Some(0) => {
168 534 : let msg = self.os.node_events().must_recv();
169 534 : match msg {
170 534 : NodeEvent::Internal(AnyMessage::Just32(0)) => {
171 534 : // got a notification about new WAL available
172 534 : }
173 0 : NodeEvent::Internal(_) => unreachable!(),
174 0 : NodeEvent::Accept(_) => unreachable!(),
175 : }
176 534 : walproposer::walproposer::WaitResult::Latch
177 : }
178 17107 : Some(index) => walproposer::walproposer::WaitResult::Network(
179 17107 : self.sk_ptrs[index],
180 17107 : WL_SOCKET_READABLE,
181 17107 : ),
182 : }
183 29432 : }
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 9343 : pub fn new(args: Args) -> Self {
207 : // initialize connection state for each safekeeper
208 9343 : let sk_conns = args
209 9343 : .config
210 9343 : .safekeepers_list
211 9343 : .iter()
212 28029 : .map(|s| {
213 28029 : SafekeeperConn::new(
214 28029 : s.split(':').next().unwrap().to_string(),
215 28029 : s.split(':').nth(1).unwrap().to_string(),
216 : )
217 28029 : })
218 9343 : .collect::<Vec<_>>();
219 :
220 9343 : Self {
221 9343 : os: args.os,
222 9343 : safekeepers: RefCell::new(sk_conns),
223 9343 : disk: args.disk,
224 9343 : redo_start_lsn: args.redo_start_lsn,
225 9343 : last_logged_commit_lsn: 0,
226 9343 : shmem: UnsafeCell::new(walproposer::api_bindings::empty_shmem()),
227 9343 : config: args.config,
228 9343 : event_set: RefCell::new(None),
229 9343 : }
230 9343 : }
231 :
232 : /// Get SafekeeperConn for the given Safekeeper.
233 309174 : fn get_conn(&self, sk: &mut walproposer::bindings::Safekeeper) -> RefMut<'_, SafekeeperConn> {
234 309174 : let sk_port = unsafe { CStr::from_ptr(sk.port).to_str().unwrap() };
235 309174 : let state = self.safekeepers.borrow_mut();
236 309174 : RefMut::map(state, |v| {
237 309174 : v.iter_mut()
238 617857 : .find(|conn| conn.port == sk_port)
239 309174 : .expect("safekeeper conn not found by port")
240 309174 : })
241 309174 : }
242 : }
243 :
244 : impl ApiImpl for SimulationApi {
245 330364 : fn get_current_timestamp(&self) -> i64 {
246 330364 : debug!("get_current_timestamp");
247 : // PG TimestampTZ is microseconds, but simulation unit is assumed to be
248 : // milliseconds, so add 10^3
249 330364 : self.os.now() as i64 * 1000
250 330364 : }
251 :
252 892 : fn update_donor(&self, donor: &mut walproposer::bindings::Safekeeper, donor_lsn: u64) {
253 892 : let mut shmem = unsafe { *self.get_shmem_state() };
254 892 : shmem.propEpochStartLsn.value = donor_lsn;
255 892 : shmem.donor_conninfo = donor.conninfo;
256 892 : }
257 :
258 34958 : fn conn_status(
259 34958 : &self,
260 34958 : _: &mut walproposer::bindings::Safekeeper,
261 34958 : ) -> walproposer::bindings::WalProposerConnStatusType {
262 34958 : debug!("conn_status");
263 : // break the connection with a 10% chance
264 34958 : if self.os.random(100) < 10 {
265 3565 : walproposer::bindings::WalProposerConnStatusType_WP_CONNECTION_BAD
266 : } else {
267 31393 : walproposer::bindings::WalProposerConnStatusType_WP_CONNECTION_OK
268 : }
269 34958 : }
270 :
271 34958 : fn conn_connect_start(&self, sk: &mut walproposer::bindings::Safekeeper) {
272 34958 : debug!("conn_connect_start");
273 34958 : let mut conn = self.get_conn(sk);
274 :
275 34958 : assert!(conn.socket.is_none());
276 34958 : let socket = self.os.open_tcp(conn.node_id);
277 34958 : conn.socket = Some(socket);
278 34958 : conn.raw_ptr = sk;
279 34958 : conn.is_connecting = true;
280 34958 : }
281 :
282 31393 : fn conn_connect_poll(
283 31393 : &self,
284 31393 : _: &mut walproposer::bindings::Safekeeper,
285 31393 : ) -> walproposer::bindings::WalProposerConnectPollStatusType {
286 31393 : debug!("conn_connect_poll");
287 : // TODO: break the connection here
288 31393 : walproposer::bindings::WalProposerConnectPollStatusType_WP_CONN_POLLING_OK
289 31393 : }
290 :
291 31393 : fn conn_send_query(&self, sk: &mut walproposer::bindings::Safekeeper, query: &str) -> bool {
292 31393 : debug!("conn_send_query: {}", query);
293 31393 : self.get_conn(sk).is_start_wal_push = true;
294 31393 : true
295 31393 : }
296 :
297 31393 : fn conn_get_query_result(
298 31393 : &self,
299 31393 : _: &mut walproposer::bindings::Safekeeper,
300 31393 : ) -> walproposer::bindings::WalProposerExecStatusType {
301 31393 : debug!("conn_get_query_result");
302 : // TODO: break the connection here
303 31393 : walproposer::bindings::WalProposerExecStatusType_WP_EXEC_SUCCESS_COPYBOTH
304 31393 : }
305 :
306 19110 : fn conn_async_read(
307 19110 : &self,
308 19110 : sk: &mut walproposer::bindings::Safekeeper,
309 19110 : vec: &mut Vec<u8>,
310 19110 : ) -> walproposer::bindings::PGAsyncReadResult {
311 19110 : debug!("conn_async_read");
312 19110 : let mut conn = self.get_conn(sk);
313 :
314 19110 : let socket = if let Some(socket) = conn.socket.as_mut() {
315 19110 : socket
316 : } else {
317 : // socket is already closed
318 0 : return walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_FAIL;
319 : };
320 :
321 19110 : let msg = socket.recv_chan().try_recv();
322 :
323 16960 : match msg {
324 : None => {
325 : // no message is ready
326 2150 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_TRY_AGAIN
327 : }
328 : Some(NetEvent::Closed) => {
329 : // connection is closed
330 8800 : debug!("conn_async_read: connection is closed");
331 8800 : conn.socket = None;
332 8800 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_FAIL
333 : }
334 8160 : Some(NetEvent::Message(msg)) => {
335 : // got a message
336 8160 : let b = match msg {
337 8160 : desim::proto::AnyMessage::Bytes(b) => b,
338 0 : _ => unreachable!(),
339 : };
340 8160 : vec.extend_from_slice(&b);
341 8160 : walproposer::bindings::PGAsyncReadResult_PG_ASYNC_READ_SUCCESS
342 : }
343 : }
344 19110 : }
345 :
346 34753 : fn conn_blocking_write(&self, sk: &mut walproposer::bindings::Safekeeper, buf: &[u8]) -> bool {
347 34753 : let mut conn = self.get_conn(sk);
348 34753 : debug!("conn_blocking_write to {}: {:?}", conn.node_id, buf);
349 34753 : let socket = conn.socket.as_mut().unwrap();
350 34753 : socket.send(desim::proto::AnyMessage::Bytes(Bytes::copy_from_slice(buf)));
351 34753 : true
352 34753 : }
353 :
354 4879 : fn conn_async_write(
355 4879 : &self,
356 4879 : sk: &mut walproposer::bindings::Safekeeper,
357 4879 : buf: &[u8],
358 4879 : ) -> walproposer::bindings::PGAsyncWriteResult {
359 4879 : let mut conn = self.get_conn(sk);
360 4879 : debug!("conn_async_write to {}: {:?}", conn.node_id, buf);
361 4879 : if let Some(socket) = conn.socket.as_mut() {
362 4879 : socket.send(desim::proto::AnyMessage::Bytes(Bytes::copy_from_slice(buf)));
363 4879 : } 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 4879 : walproposer::bindings::PGAsyncWriteResult_PG_ASYNC_WRITE_SUCCESS
369 4879 : }
370 :
371 903 : fn wal_reader_allocate(&self, _: &mut walproposer::bindings::Safekeeper) -> NeonWALReadResult {
372 903 : debug!("wal_reader_allocate");
373 903 : walproposer::bindings::NeonWALReadResult_NEON_WALREAD_SUCCESS
374 903 : }
375 :
376 1111 : fn wal_read(
377 1111 : &self,
378 1111 : _sk: &mut walproposer::bindings::Safekeeper,
379 1111 : buf: &mut [u8],
380 1111 : startpos: u64,
381 1111 : ) -> NeonWALReadResult {
382 1111 : self.disk.lock().read(startpos, buf);
383 1111 : walproposer::bindings::NeonWALReadResult_NEON_WALREAD_SUCCESS
384 1111 : }
385 :
386 9343 : fn init_event_set(&self, _: &mut walproposer::bindings::WalProposer) {
387 9343 : debug!("init_event_set");
388 9343 : let new_event_set = EventSet::new(self.os.clone());
389 9343 : let old_event_set = self.event_set.replace(Some(new_event_set));
390 9343 : assert!(old_event_set.is_none());
391 9343 : }
392 :
393 67899 : fn update_event_set(&self, sk: &mut walproposer::bindings::Safekeeper, event_mask: u32) {
394 67899 : debug!(
395 0 : "update_event_set, sk={:?}, events_mask={:#b}",
396 0 : sk as *mut walproposer::bindings::Safekeeper, event_mask
397 : );
398 67899 : let conn = self.get_conn(sk);
399 :
400 67899 : self.event_set
401 67899 : .borrow_mut()
402 67899 : .as_mut()
403 67899 : .unwrap()
404 67899 : .update_event_set(&conn, event_mask);
405 67899 : }
406 :
407 62786 : fn add_safekeeper_event_set(
408 62786 : &self,
409 62786 : sk: &mut walproposer::bindings::Safekeeper,
410 62786 : event_mask: u32,
411 62786 : ) {
412 62786 : debug!(
413 0 : "add_safekeeper_event_set, sk={:?}, events_mask={:#b}",
414 0 : sk as *mut walproposer::bindings::Safekeeper, event_mask
415 : );
416 :
417 62786 : self.event_set
418 62786 : .borrow_mut()
419 62786 : .as_mut()
420 62786 : .unwrap()
421 62786 : .add_safekeeper(&self.get_conn(sk), event_mask);
422 62786 : }
423 :
424 40489 : fn rm_safekeeper_event_set(&self, sk: &mut walproposer::bindings::Safekeeper) {
425 40489 : debug!(
426 0 : "rm_safekeeper_event_set, sk={:?}",
427 0 : sk as *mut walproposer::bindings::Safekeeper,
428 : );
429 :
430 40489 : self.event_set
431 40489 : .borrow_mut()
432 40489 : .as_mut()
433 40489 : .unwrap()
434 40489 : .remove_safekeeper(&self.get_conn(sk));
435 40489 : }
436 :
437 6126 : fn active_state_update_event_set(&self, sk: &mut walproposer::bindings::Safekeeper) {
438 6126 : debug!("active_state_update_event_set");
439 :
440 6126 : assert!(sk.state == walproposer::bindings::SafekeeperState_SS_ACTIVE);
441 6126 : self.event_set
442 6126 : .borrow_mut()
443 6126 : .as_mut()
444 6126 : .unwrap()
445 6126 : .refresh_event_set();
446 6126 : }
447 :
448 18831 : fn wal_reader_events(&self, _sk: &mut walproposer::bindings::Safekeeper) -> u32 {
449 18831 : 0
450 18831 : }
451 :
452 92218 : fn wait_event_set(
453 92218 : &self,
454 92218 : _: &mut walproposer::bindings::WalProposer,
455 92218 : timeout_millis: i64,
456 92218 : ) -> walproposer::walproposer::WaitResult {
457 : // TODO: handle multiple stages as part of the simulation (e.g. connect, start_wal_push, etc)
458 92218 : let mut conns = self.safekeepers.borrow_mut();
459 213798 : for conn in conns.iter_mut() {
460 213798 : if conn.socket.is_some() && conn.is_connecting {
461 31393 : conn.is_connecting = false;
462 31393 : debug!("wait_event_set, connecting to {}:{}", conn.host, conn.port);
463 31393 : return walproposer::walproposer::WaitResult::Network(
464 31393 : conn.raw_ptr,
465 31393 : WL_SOCKET_READABLE | WL_SOCKET_WRITEABLE,
466 31393 : );
467 182405 : }
468 182405 : if conn.socket.is_some() && conn.is_start_wal_push {
469 31393 : conn.is_start_wal_push = false;
470 31393 : debug!(
471 0 : "wait_event_set, start wal push to {}:{}",
472 : conn.host, conn.port
473 : );
474 31393 : return walproposer::walproposer::WaitResult::Network(
475 31393 : conn.raw_ptr,
476 31393 : WL_SOCKET_READABLE,
477 31393 : );
478 151012 : }
479 : }
480 29432 : drop(conns);
481 :
482 29432 : let res = self
483 29432 : .event_set
484 29432 : .borrow_mut()
485 29432 : .as_mut()
486 29432 : .unwrap()
487 29432 : .wait(timeout_millis);
488 :
489 29432 : debug!(
490 0 : "wait_event_set, timeout_millis={}, res={:?}",
491 : timeout_millis, res,
492 : );
493 29432 : res
494 92218 : }
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 :
502 327 : fn finish_sync_safekeepers(&self, lsn: u64) -> ! {
503 327 : debug!("finish_sync_safekeepers, lsn={}", lsn);
504 327 : executor::exit(0, Lsn(lsn).to_string());
505 : }
506 :
507 155483 : fn log_internal(&self, _wp: &mut walproposer::bindings::WalProposer, level: Level, msg: &str) {
508 155483 : debug!("wp_log[{}] {}", level, msg);
509 155483 : if level == Level::Fatal || level == Level::Panic {
510 69 : if msg.contains("rejects our connection request with term") {
511 : // collected quorum with lower term, then got rejected by next connected safekeeper
512 49 : executor::exit(1, msg.to_owned());
513 20 : }
514 20 : if msg.contains("collected propTermStartLsn") && msg.contains(", but basebackup LSN ") {
515 : // sync-safekeepers collected wrong quorum, walproposer collected another quorum
516 1 : executor::exit(1, msg.to_owned());
517 19 : }
518 19 : if msg.contains("failed to download WAL for logical replicaiton") {
519 : // Recovery connection broken and recovery was failed
520 19 : 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 155414 : }
528 155414 : }
529 :
530 473 : fn after_election(&self, wp: &mut walproposer::bindings::WalProposer) {
531 473 : let prop_lsn = wp.propTermStartLsn;
532 473 : let prop_term = wp.propTerm;
533 :
534 473 : let mut prev_lsn: u64 = 0;
535 473 : let mut prev_term: u64 = 0;
536 :
537 : unsafe {
538 473 : let history = wp.propTermHistory.entries;
539 473 : let len = wp.propTermHistory.n_entries as usize;
540 473 : if len > 1 {
541 424 : let entry = *history.wrapping_add(len - 2);
542 424 : prev_lsn = entry.lsn;
543 424 : prev_term = entry.term;
544 424 : }
545 : }
546 :
547 473 : let msg = format!("prop_elected;{prop_lsn};{prop_term};{prev_lsn};{prev_term}");
548 :
549 473 : debug!(msg);
550 473 : self.os.log_event(msg);
551 473 : }
552 :
553 202 : fn get_redo_start_lsn(&self) -> u64 {
554 202 : debug!("get_redo_start_lsn -> {:?}", self.redo_start_lsn);
555 202 : self.redo_start_lsn.expect("redo_start_lsn is not set").0
556 202 : }
557 :
558 1840 : fn get_shmem_state(&self) -> *mut walproposer::bindings::WalproposerShmemState {
559 1840 : self.shmem.get()
560 1840 : }
561 :
562 147 : fn start_streaming(
563 147 : &self,
564 147 : startpos: u64,
565 147 : callback: &walproposer::walproposer::StreamingCallback,
566 147 : ) {
567 147 : let disk = &self.disk;
568 147 : let disk_lsn = disk.lock().flush_rec_ptr().0;
569 147 : debug!("start_streaming at {} (disk_lsn={})", startpos, disk_lsn);
570 147 : if startpos < disk_lsn {
571 47 : debug!(
572 0 : "startpos < disk_lsn, it means we wrote some transaction even before streaming started"
573 : );
574 100 : }
575 147 : assert!(startpos <= disk_lsn);
576 147 : let mut broadcasted = Lsn(startpos);
577 :
578 : loop {
579 498 : let available = disk.lock().flush_rec_ptr();
580 498 : assert!(available >= broadcasted);
581 351 : callback.broadcast(broadcasted, available);
582 351 : broadcasted = available;
583 351 : callback.poll();
584 : }
585 : }
586 :
587 2351 : fn process_safekeeper_feedback(
588 2351 : &mut self,
589 2351 : wp: &mut walproposer::bindings::WalProposer,
590 2351 : _sk: &mut walproposer::bindings::Safekeeper,
591 2351 : ) {
592 2351 : debug!("process_safekeeper_feedback, commit_lsn={}", wp.commitLsn);
593 2351 : if wp.commitLsn > self.last_logged_commit_lsn {
594 472 : self.os.log_event(format!("commit_lsn;{}", wp.commitLsn));
595 472 : self.last_logged_commit_lsn = wp.commitLsn;
596 1879 : }
597 2351 : }
598 :
599 115 : fn get_flush_rec_ptr(&self) -> u64 {
600 115 : let lsn = self.disk.lock().flush_rec_ptr();
601 115 : debug!("get_flush_rec_ptr: {}", lsn);
602 115 : lsn.0
603 115 : }
604 :
605 473 : fn recovery_download(
606 473 : &self,
607 473 : wp: &mut walproposer::bindings::WalProposer,
608 473 : sk: &mut walproposer::bindings::Safekeeper,
609 473 : ) -> bool {
610 473 : let mut startpos = wp.truncateLsn;
611 473 : let endpos = wp.propTermStartLsn;
612 :
613 473 : if startpos == endpos {
614 227 : debug!("recovery_download: nothing to download");
615 227 : return true;
616 246 : }
617 :
618 246 : debug!("recovery_download from {} to {}", startpos, endpos,);
619 :
620 246 : let replication_prompt = format!(
621 246 : "START_REPLICATION {} {} {} {}",
622 : self.config.ttid.tenant_id, self.config.ttid.timeline_id, startpos, endpos,
623 : );
624 246 : let async_conn = self.get_conn(sk);
625 :
626 246 : let conn = self.os.open_tcp(async_conn.node_id);
627 246 : conn.send(desim::proto::AnyMessage::Bytes(replication_prompt.into()));
628 :
629 246 : let chan = conn.recv_chan();
630 423 : while startpos < endpos {
631 246 : let event = chan.recv();
632 227 : match event {
633 : NetEvent::Closed => {
634 19 : debug!("connection closed in recovery");
635 19 : break;
636 : }
637 177 : NetEvent::Message(AnyMessage::Bytes(b)) => {
638 177 : debug!("got recovery bytes from safekeeper");
639 177 : self.disk.lock().write(startpos, &b);
640 177 : startpos += b.len() as u64;
641 : }
642 50 : NetEvent::Message(_) => unreachable!(),
643 : }
644 : }
645 :
646 196 : debug!("recovery finished at {}", startpos);
647 :
648 196 : startpos == endpos
649 423 : }
650 :
651 12661 : fn conn_finish(&self, sk: &mut walproposer::bindings::Safekeeper) {
652 12661 : let mut conn = self.get_conn(sk);
653 12661 : debug!("conn_finish to {}", conn.node_id);
654 12661 : if let Some(socket) = conn.socket.as_mut() {
655 3856 : socket.close();
656 8805 : } else {
657 8805 : // connection is already closed
658 8805 : }
659 12661 : conn.socket = None;
660 12661 : }
661 :
662 12365 : fn conn_error_message(&self, _sk: &mut walproposer::bindings::Safekeeper) -> String {
663 12365 : "connection is closed, probably".into()
664 12365 : }
665 : }
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