Line data Source code
1 : //! A C-Rust shim: defines implementation of C walproposer API, assuming wp
2 : //! callback_data stores Box to some Rust implementation.
3 :
4 : #![allow(dead_code)]
5 :
6 : use std::ffi::CStr;
7 : use std::ffi::CString;
8 :
9 : use crate::bindings::uint32;
10 : use crate::bindings::walproposer_api;
11 : use crate::bindings::NeonWALReadResult;
12 : use crate::bindings::PGAsyncReadResult;
13 : use crate::bindings::PGAsyncWriteResult;
14 : use crate::bindings::Safekeeper;
15 : use crate::bindings::Size;
16 : use crate::bindings::StringInfoData;
17 : use crate::bindings::TimestampTz;
18 : use crate::bindings::WalProposer;
19 : use crate::bindings::WalProposerConnStatusType;
20 : use crate::bindings::WalProposerConnectPollStatusType;
21 : use crate::bindings::WalProposerExecStatusType;
22 : use crate::bindings::WalproposerShmemState;
23 : use crate::bindings::XLogRecPtr;
24 : use crate::walproposer::ApiImpl;
25 : use crate::walproposer::StreamingCallback;
26 : use crate::walproposer::WaitResult;
27 :
28 1578 : extern "C" fn get_shmem_state(wp: *mut WalProposer) -> *mut WalproposerShmemState {
29 1578 : unsafe {
30 1578 : let callback_data = (*(*wp).config).callback_data;
31 1578 : let api = callback_data as *mut Box<dyn ApiImpl>;
32 1578 : (*api).get_shmem_state()
33 1578 : }
34 1578 : }
35 :
36 164 : extern "C-unwind" fn start_streaming(wp: *mut WalProposer, startpos: XLogRecPtr) {
37 164 : unsafe {
38 164 : let callback_data = (*(*wp).config).callback_data;
39 164 : let api = callback_data as *mut Box<dyn ApiImpl>;
40 164 : let callback = StreamingCallback::new(wp);
41 164 : (*api).start_streaming(startpos, &callback);
42 164 : }
43 164 : }
44 :
45 126 : extern "C" fn get_flush_rec_ptr(wp: *mut WalProposer) -> XLogRecPtr {
46 126 : unsafe {
47 126 : let callback_data = (*(*wp).config).callback_data;
48 126 : let api = callback_data as *mut Box<dyn ApiImpl>;
49 126 : (*api).get_flush_rec_ptr()
50 126 : }
51 126 : }
52 :
53 1041 : extern "C" fn update_donor(wp: *mut WalProposer, donor: *mut Safekeeper, donor_lsn: XLogRecPtr) {
54 1041 : unsafe {
55 1041 : let callback_data = (*(*wp).config).callback_data;
56 1041 : let api = callback_data as *mut Box<dyn ApiImpl>;
57 1041 : (*api).update_donor(&mut (*donor), donor_lsn)
58 1041 : }
59 1041 : }
60 :
61 332542 : extern "C" fn get_current_timestamp(wp: *mut WalProposer) -> TimestampTz {
62 332542 : unsafe {
63 332542 : let callback_data = (*(*wp).config).callback_data;
64 332542 : let api = callback_data as *mut Box<dyn ApiImpl>;
65 332542 : (*api).get_current_timestamp()
66 332542 : }
67 332542 : }
68 :
69 11143 : extern "C" fn conn_error_message(sk: *mut Safekeeper) -> *mut ::std::os::raw::c_char {
70 11143 : unsafe {
71 11143 : let callback_data = (*(*(*sk).wp).config).callback_data;
72 11143 : let api = callback_data as *mut Box<dyn ApiImpl>;
73 11143 : let msg = (*api).conn_error_message(&mut (*sk));
74 11143 : let msg = CString::new(msg).unwrap();
75 11143 : // TODO: fix leaking error message
76 11143 : msg.into_raw()
77 11143 : }
78 11143 : }
79 :
80 35199 : extern "C" fn conn_status(sk: *mut Safekeeper) -> WalProposerConnStatusType {
81 35199 : unsafe {
82 35199 : let callback_data = (*(*(*sk).wp).config).callback_data;
83 35199 : let api = callback_data as *mut Box<dyn ApiImpl>;
84 35199 : (*api).conn_status(&mut (*sk))
85 35199 : }
86 35199 : }
87 :
88 35199 : extern "C" fn conn_connect_start(sk: *mut Safekeeper) {
89 35199 : unsafe {
90 35199 : let callback_data = (*(*(*sk).wp).config).callback_data;
91 35199 : let api = callback_data as *mut Box<dyn ApiImpl>;
92 35199 : (*api).conn_connect_start(&mut (*sk))
93 35199 : }
94 35199 : }
95 :
96 31652 : extern "C" fn conn_connect_poll(sk: *mut Safekeeper) -> WalProposerConnectPollStatusType {
97 31652 : unsafe {
98 31652 : let callback_data = (*(*(*sk).wp).config).callback_data;
99 31652 : let api = callback_data as *mut Box<dyn ApiImpl>;
100 31652 : (*api).conn_connect_poll(&mut (*sk))
101 31652 : }
102 31652 : }
103 :
104 31652 : extern "C" fn conn_send_query(sk: *mut Safekeeper, query: *mut ::std::os::raw::c_char) -> bool {
105 31652 : let query = unsafe { CStr::from_ptr(query) };
106 31652 : let query = query.to_str().unwrap();
107 31652 :
108 31652 : unsafe {
109 31652 : let callback_data = (*(*(*sk).wp).config).callback_data;
110 31652 : let api = callback_data as *mut Box<dyn ApiImpl>;
111 31652 : (*api).conn_send_query(&mut (*sk), query)
112 31652 : }
113 31652 : }
114 :
115 31652 : extern "C" fn conn_get_query_result(sk: *mut Safekeeper) -> WalProposerExecStatusType {
116 31652 : unsafe {
117 31652 : let callback_data = (*(*(*sk).wp).config).callback_data;
118 31652 : let api = callback_data as *mut Box<dyn ApiImpl>;
119 31652 : (*api).conn_get_query_result(&mut (*sk))
120 31652 : }
121 31652 : }
122 :
123 0 : extern "C" fn conn_flush(sk: *mut Safekeeper) -> ::std::os::raw::c_int {
124 0 : unsafe {
125 0 : let callback_data = (*(*(*sk).wp).config).callback_data;
126 0 : let api = callback_data as *mut Box<dyn ApiImpl>;
127 0 : (*api).conn_flush(&mut (*sk))
128 0 : }
129 0 : }
130 :
131 11370 : extern "C" fn conn_finish(sk: *mut Safekeeper) {
132 11370 : unsafe {
133 11370 : let callback_data = (*(*(*sk).wp).config).callback_data;
134 11370 : let api = callback_data as *mut Box<dyn ApiImpl>;
135 11370 : (*api).conn_finish(&mut (*sk))
136 11370 : }
137 11370 : }
138 :
139 18950 : extern "C" fn conn_async_read(
140 18950 : sk: *mut Safekeeper,
141 18950 : buf: *mut *mut ::std::os::raw::c_char,
142 18950 : amount: *mut ::std::os::raw::c_int,
143 18950 : ) -> PGAsyncReadResult {
144 18950 : unsafe {
145 18950 : let callback_data = (*(*(*sk).wp).config).callback_data;
146 18950 : let api = callback_data as *mut Box<dyn ApiImpl>;
147 18950 :
148 18950 : // This function has guarantee that returned buf will be valid until
149 18950 : // the next call. So we can store a Vec in each Safekeeper and reuse
150 18950 : // it on the next call.
151 18950 : let mut inbuf = take_vec_u8(&mut (*sk).inbuf).unwrap_or_default();
152 18950 : inbuf.clear();
153 18950 :
154 18950 : let result = (*api).conn_async_read(&mut (*sk), &mut inbuf);
155 18950 :
156 18950 : // Put a Vec back to sk->inbuf and return data ptr.
157 18950 : *amount = inbuf.len() as i32;
158 18950 : *buf = store_vec_u8(&mut (*sk).inbuf, inbuf);
159 18950 :
160 18950 : result
161 18950 : }
162 18950 : }
163 :
164 5434 : extern "C" fn conn_async_write(
165 5434 : sk: *mut Safekeeper,
166 5434 : buf: *const ::std::os::raw::c_void,
167 5434 : size: usize,
168 5434 : ) -> PGAsyncWriteResult {
169 5434 : unsafe {
170 5434 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
171 5434 : let callback_data = (*(*(*sk).wp).config).callback_data;
172 5434 : let api = callback_data as *mut Box<dyn ApiImpl>;
173 5434 : (*api).conn_async_write(&mut (*sk), buf)
174 5434 : }
175 5434 : }
176 :
177 35569 : extern "C" fn conn_blocking_write(
178 35569 : sk: *mut Safekeeper,
179 35569 : buf: *const ::std::os::raw::c_void,
180 35569 : size: usize,
181 35569 : ) -> bool {
182 35569 : unsafe {
183 35569 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
184 35569 : let callback_data = (*(*(*sk).wp).config).callback_data;
185 35569 : let api = callback_data as *mut Box<dyn ApiImpl>;
186 35569 : (*api).conn_blocking_write(&mut (*sk), buf)
187 35569 : }
188 35569 : }
189 :
190 786 : extern "C-unwind" fn recovery_download(wp: *mut WalProposer, sk: *mut Safekeeper) -> bool {
191 786 : unsafe {
192 786 : let callback_data = (*(*(*sk).wp).config).callback_data;
193 786 : let api = callback_data as *mut Box<dyn ApiImpl>;
194 786 :
195 786 : // currently `recovery_download` is always called right after election
196 786 : (*api).after_election(&mut (*wp));
197 786 :
198 786 : (*api).recovery_download(&mut (*wp), &mut (*sk))
199 786 : }
200 786 : }
201 :
202 1106 : extern "C" fn wal_reader_allocate(sk: *mut Safekeeper) {
203 1106 : unsafe {
204 1106 : let callback_data = (*(*(*sk).wp).config).callback_data;
205 1106 : let api = callback_data as *mut Box<dyn ApiImpl>;
206 1106 : (*api).wal_reader_allocate(&mut (*sk));
207 1106 : }
208 1106 : }
209 :
210 : #[allow(clippy::unnecessary_cast)]
211 980 : extern "C" fn wal_read(
212 980 : sk: *mut Safekeeper,
213 980 : buf: *mut ::std::os::raw::c_char,
214 980 : startptr: XLogRecPtr,
215 980 : count: Size,
216 980 : _errmsg: *mut *mut ::std::os::raw::c_char,
217 980 : ) -> NeonWALReadResult {
218 980 : unsafe {
219 980 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, count);
220 980 : let callback_data = (*(*(*sk).wp).config).callback_data;
221 980 : let api = callback_data as *mut Box<dyn ApiImpl>;
222 980 : // TODO: errmsg is not forwarded
223 980 : (*api).wal_read(&mut (*sk), buf, startptr)
224 980 : }
225 980 : }
226 :
227 18050 : extern "C" fn wal_reader_events(sk: *mut Safekeeper) -> uint32 {
228 18050 : unsafe {
229 18050 : let callback_data = (*(*(*sk).wp).config).callback_data;
230 18050 : let api = callback_data as *mut Box<dyn ApiImpl>;
231 18050 : (*api).wal_reader_events(&mut (*sk))
232 18050 : }
233 18050 : }
234 :
235 9590 : extern "C" fn init_event_set(wp: *mut WalProposer) {
236 9590 : unsafe {
237 9590 : let callback_data = (*(*wp).config).callback_data;
238 9590 : let api = callback_data as *mut Box<dyn ApiImpl>;
239 9590 : (*api).init_event_set(&mut (*wp));
240 9590 : }
241 9590 : }
242 :
243 70026 : extern "C" fn update_event_set(sk: *mut Safekeeper, events: uint32) {
244 70026 : unsafe {
245 70026 : let callback_data = (*(*(*sk).wp).config).callback_data;
246 70026 : let api = callback_data as *mut Box<dyn ApiImpl>;
247 70026 : (*api).update_event_set(&mut (*sk), events);
248 70026 : }
249 70026 : }
250 :
251 6571 : extern "C" fn active_state_update_event_set(sk: *mut Safekeeper) {
252 6571 : unsafe {
253 6571 : let callback_data = (*(*(*sk).wp).config).callback_data;
254 6571 : let api = callback_data as *mut Box<dyn ApiImpl>;
255 6571 : (*api).active_state_update_event_set(&mut (*sk));
256 6571 : }
257 6571 : }
258 :
259 63304 : extern "C" fn add_safekeeper_event_set(sk: *mut Safekeeper, events: uint32) {
260 63304 : unsafe {
261 63304 : let callback_data = (*(*(*sk).wp).config).callback_data;
262 63304 : let api = callback_data as *mut Box<dyn ApiImpl>;
263 63304 : (*api).add_safekeeper_event_set(&mut (*sk), events);
264 63304 : }
265 63304 : }
266 :
267 39475 : extern "C" fn rm_safekeeper_event_set(sk: *mut Safekeeper) {
268 39475 : unsafe {
269 39475 : let callback_data = (*(*(*sk).wp).config).callback_data;
270 39475 : let api = callback_data as *mut Box<dyn ApiImpl>;
271 39475 : (*api).rm_safekeeper_event_set(&mut (*sk));
272 39475 : }
273 39475 : }
274 :
275 92640 : extern "C-unwind" fn wait_event_set(
276 92640 : wp: *mut WalProposer,
277 92640 : timeout: ::std::os::raw::c_long,
278 92640 : event_sk: *mut *mut Safekeeper,
279 92640 : events: *mut uint32,
280 92640 : ) -> ::std::os::raw::c_int {
281 92640 : unsafe {
282 92640 : let callback_data = (*(*wp).config).callback_data;
283 92640 : let api = callback_data as *mut Box<dyn ApiImpl>;
284 92640 : let result = (*api).wait_event_set(&mut (*wp), timeout);
285 92640 : match result {
286 : WaitResult::Latch => {
287 9636 : *event_sk = std::ptr::null_mut();
288 9636 : *events = crate::bindings::WL_LATCH_SET;
289 9636 : 1
290 : }
291 : WaitResult::Timeout => {
292 2881 : *event_sk = std::ptr::null_mut();
293 2881 : // WaitEventSetWait returns 0 for timeout.
294 2881 : *events = 0;
295 2881 : 0
296 : }
297 80123 : WaitResult::Network(sk, event_mask) => {
298 80123 : *event_sk = sk;
299 80123 : *events = event_mask;
300 80123 : 1
301 : }
302 : }
303 : }
304 92640 : }
305 :
306 9590 : extern "C" fn strong_random(
307 9590 : wp: *mut WalProposer,
308 9590 : buf: *mut ::std::os::raw::c_void,
309 9590 : len: usize,
310 9590 : ) -> bool {
311 9590 : unsafe {
312 9590 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, len);
313 9590 : let callback_data = (*(*wp).config).callback_data;
314 9590 : let api = callback_data as *mut Box<dyn ApiImpl>;
315 9590 : (*api).strong_random(buf)
316 9590 : }
317 9590 : }
318 :
319 303 : extern "C" fn get_redo_start_lsn(wp: *mut WalProposer) -> XLogRecPtr {
320 303 : unsafe {
321 303 : let callback_data = (*(*wp).config).callback_data;
322 303 : let api = callback_data as *mut Box<dyn ApiImpl>;
323 303 : (*api).get_redo_start_lsn()
324 303 : }
325 303 : }
326 :
327 355 : extern "C-unwind" fn finish_sync_safekeepers(wp: *mut WalProposer, lsn: XLogRecPtr) {
328 355 : unsafe {
329 355 : let callback_data = (*(*wp).config).callback_data;
330 355 : let api = callback_data as *mut Box<dyn ApiImpl>;
331 355 : (*api).finish_sync_safekeepers(lsn)
332 355 : }
333 355 : }
334 :
335 2418 : extern "C" fn process_safekeeper_feedback(wp: *mut WalProposer, sk: *mut Safekeeper) {
336 2418 : unsafe {
337 2418 : let callback_data = (*(*wp).config).callback_data;
338 2418 : let api = callback_data as *mut Box<dyn ApiImpl>;
339 2418 : (*api).process_safekeeper_feedback(&mut (*wp), &mut (*sk));
340 2418 : }
341 2418 : }
342 :
343 95968 : extern "C-unwind" fn log_internal(
344 95968 : wp: *mut WalProposer,
345 95968 : level: ::std::os::raw::c_int,
346 95968 : line: *const ::std::os::raw::c_char,
347 95968 : ) {
348 95968 : unsafe {
349 95968 : let callback_data = (*(*wp).config).callback_data;
350 95968 : let api = callback_data as *mut Box<dyn ApiImpl>;
351 95968 : let line = CStr::from_ptr(line);
352 95968 : let line = line.to_str().unwrap();
353 95968 : (*api).log_internal(&mut (*wp), Level::from(level as u32), line)
354 95968 : }
355 95968 : }
356 :
357 : #[derive(Debug, PartialEq)]
358 : pub enum Level {
359 : Debug5,
360 : Debug4,
361 : Debug3,
362 : Debug2,
363 : Debug1,
364 : Log,
365 : Info,
366 : Notice,
367 : Warning,
368 : Error,
369 : Fatal,
370 : Panic,
371 : WPEvent,
372 : }
373 :
374 : impl Level {
375 95968 : pub fn from(elevel: u32) -> Level {
376 : use crate::bindings::*;
377 :
378 95968 : match elevel {
379 4328 : DEBUG5 => Level::Debug5,
380 0 : DEBUG4 => Level::Debug4,
381 0 : DEBUG3 => Level::Debug3,
382 2418 : DEBUG2 => Level::Debug2,
383 0 : DEBUG1 => Level::Debug1,
384 77731 : LOG => Level::Log,
385 0 : INFO => Level::Info,
386 0 : NOTICE => Level::Notice,
387 11435 : WARNING => Level::Warning,
388 0 : ERROR => Level::Error,
389 53 : FATAL => Level::Fatal,
390 3 : PANIC => Level::Panic,
391 0 : WPEVENT => Level::WPEvent,
392 0 : _ => panic!("unknown log level {}", elevel),
393 : }
394 95968 : }
395 : }
396 :
397 9590 : pub(crate) fn create_api() -> walproposer_api {
398 9590 : walproposer_api {
399 9590 : get_shmem_state: Some(get_shmem_state),
400 9590 : start_streaming: Some(start_streaming),
401 9590 : get_flush_rec_ptr: Some(get_flush_rec_ptr),
402 9590 : update_donor: Some(update_donor),
403 9590 : get_current_timestamp: Some(get_current_timestamp),
404 9590 : conn_error_message: Some(conn_error_message),
405 9590 : conn_status: Some(conn_status),
406 9590 : conn_connect_start: Some(conn_connect_start),
407 9590 : conn_connect_poll: Some(conn_connect_poll),
408 9590 : conn_send_query: Some(conn_send_query),
409 9590 : conn_get_query_result: Some(conn_get_query_result),
410 9590 : conn_flush: Some(conn_flush),
411 9590 : conn_finish: Some(conn_finish),
412 9590 : conn_async_read: Some(conn_async_read),
413 9590 : conn_async_write: Some(conn_async_write),
414 9590 : conn_blocking_write: Some(conn_blocking_write),
415 9590 : recovery_download: Some(recovery_download),
416 9590 : wal_reader_allocate: Some(wal_reader_allocate),
417 9590 : wal_read: Some(wal_read),
418 9590 : wal_reader_events: Some(wal_reader_events),
419 9590 : init_event_set: Some(init_event_set),
420 9590 : update_event_set: Some(update_event_set),
421 9590 : active_state_update_event_set: Some(active_state_update_event_set),
422 9590 : add_safekeeper_event_set: Some(add_safekeeper_event_set),
423 9590 : rm_safekeeper_event_set: Some(rm_safekeeper_event_set),
424 9590 : wait_event_set: Some(wait_event_set),
425 9590 : strong_random: Some(strong_random),
426 9590 : get_redo_start_lsn: Some(get_redo_start_lsn),
427 9590 : finish_sync_safekeepers: Some(finish_sync_safekeepers),
428 9590 : process_safekeeper_feedback: Some(process_safekeeper_feedback),
429 9590 : log_internal: Some(log_internal),
430 9590 : }
431 9590 : }
432 :
433 9590 : pub fn empty_shmem() -> crate::bindings::WalproposerShmemState {
434 9590 : let empty_feedback = crate::bindings::PageserverFeedback {
435 9590 : present: false,
436 9590 : currentClusterSize: 0,
437 9590 : last_received_lsn: 0,
438 9590 : disk_consistent_lsn: 0,
439 9590 : remote_consistent_lsn: 0,
440 9590 : replytime: 0,
441 9590 : shard_number: 0,
442 9590 : };
443 9590 :
444 9590 : crate::bindings::WalproposerShmemState {
445 9590 : propEpochStartLsn: crate::bindings::pg_atomic_uint64 { value: 0 },
446 9590 : donor_name: [0; 64],
447 9590 : donor_conninfo: [0; 1024],
448 9590 : donor_lsn: 0,
449 9590 : mutex: 0,
450 9590 : mineLastElectedTerm: crate::bindings::pg_atomic_uint64 { value: 0 },
451 9590 : backpressureThrottlingTime: crate::bindings::pg_atomic_uint64 { value: 0 },
452 9590 : currentClusterSize: crate::bindings::pg_atomic_uint64 { value: 0 },
453 9590 : shard_ps_feedback: [empty_feedback; 128],
454 9590 : num_shards: 0,
455 9590 : min_ps_feedback: empty_feedback,
456 9590 : }
457 9590 : }
458 :
459 : impl std::fmt::Display for Level {
460 1153 : fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
461 1153 : write!(f, "{:?}", self)
462 1153 : }
463 : }
464 :
465 : /// Take ownership of `Vec<u8>` from StringInfoData.
466 : #[allow(clippy::unnecessary_cast)]
467 47712 : pub(crate) fn take_vec_u8(pg: &mut StringInfoData) -> Option<Vec<u8>> {
468 47712 : if pg.data.is_null() {
469 28767 : return None;
470 18945 : }
471 18945 :
472 18945 : let ptr = pg.data as *mut u8;
473 18945 : let length = pg.len as usize;
474 18945 : let capacity = pg.maxlen as usize;
475 18945 :
476 18945 : pg.data = std::ptr::null_mut();
477 18945 : pg.len = 0;
478 18945 : pg.maxlen = 0;
479 18945 :
480 18945 : unsafe { Some(Vec::from_raw_parts(ptr, length, capacity)) }
481 47712 : }
482 :
483 : /// Store `Vec<u8>` in StringInfoData.
484 18950 : fn store_vec_u8(pg: &mut StringInfoData, vec: Vec<u8>) -> *mut ::std::os::raw::c_char {
485 18950 : let ptr = vec.as_ptr() as *mut ::std::os::raw::c_char;
486 18950 : let length = vec.len();
487 18950 : let capacity = vec.capacity();
488 18950 :
489 18950 : assert!(pg.data.is_null());
490 :
491 18950 : pg.data = ptr;
492 18950 : pg.len = length as i32;
493 18950 : pg.maxlen = capacity as i32;
494 18950 :
495 18950 : std::mem::forget(vec);
496 18950 :
497 18950 : ptr
498 18950 : }
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