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 1135 : extern "C" fn get_shmem_state(wp: *mut WalProposer) -> *mut WalproposerShmemState {
29 1135 : unsafe {
30 1135 : let callback_data = (*(*wp).config).callback_data;
31 1135 : let api = callback_data as *mut Box<dyn ApiImpl>;
32 1135 : (*api).get_shmem_state()
33 1135 : }
34 1135 : }
35 :
36 1095 : extern "C" fn start_streaming(wp: *mut WalProposer, startpos: XLogRecPtr) {
37 1095 : unsafe {
38 1095 : let callback_data = (*(*wp).config).callback_data;
39 1095 : let api = callback_data as *mut Box<dyn ApiImpl>;
40 1095 : let callback = StreamingCallback::new(wp);
41 1095 : (*api).start_streaming(startpos, &callback);
42 1095 : }
43 1095 : }
44 :
45 726 : extern "C" fn get_flush_rec_ptr(wp: *mut WalProposer) -> XLogRecPtr {
46 726 : unsafe {
47 726 : let callback_data = (*(*wp).config).callback_data;
48 726 : let api = callback_data as *mut Box<dyn ApiImpl>;
49 726 : (*api).get_flush_rec_ptr()
50 726 : }
51 726 : }
52 :
53 2472442 : extern "C" fn get_current_timestamp(wp: *mut WalProposer) -> TimestampTz {
54 2472442 : unsafe {
55 2472442 : let callback_data = (*(*wp).config).callback_data;
56 2472442 : let api = callback_data as *mut Box<dyn ApiImpl>;
57 2472442 : (*api).get_current_timestamp()
58 2472442 : }
59 2472442 : }
60 :
61 85761 : extern "C" fn conn_error_message(sk: *mut Safekeeper) -> *mut ::std::os::raw::c_char {
62 85761 : unsafe {
63 85761 : let callback_data = (*(*(*sk).wp).config).callback_data;
64 85761 : let api = callback_data as *mut Box<dyn ApiImpl>;
65 85761 : let msg = (*api).conn_error_message(&mut (*sk));
66 85761 : let msg = CString::new(msg).unwrap();
67 85761 : // TODO: fix leaking error message
68 85761 : msg.into_raw()
69 85761 : }
70 85761 : }
71 :
72 264052 : extern "C" fn conn_status(sk: *mut Safekeeper) -> WalProposerConnStatusType {
73 264052 : unsafe {
74 264052 : let callback_data = (*(*(*sk).wp).config).callback_data;
75 264052 : let api = callback_data as *mut Box<dyn ApiImpl>;
76 264052 : (*api).conn_status(&mut (*sk))
77 264052 : }
78 264052 : }
79 :
80 264052 : extern "C" fn conn_connect_start(sk: *mut Safekeeper) {
81 264052 : unsafe {
82 264052 : let callback_data = (*(*(*sk).wp).config).callback_data;
83 264052 : let api = callback_data as *mut Box<dyn ApiImpl>;
84 264052 : (*api).conn_connect_start(&mut (*sk))
85 264052 : }
86 264052 : }
87 :
88 237702 : extern "C" fn conn_connect_poll(sk: *mut Safekeeper) -> WalProposerConnectPollStatusType {
89 237702 : unsafe {
90 237702 : let callback_data = (*(*(*sk).wp).config).callback_data;
91 237702 : let api = callback_data as *mut Box<dyn ApiImpl>;
92 237702 : (*api).conn_connect_poll(&mut (*sk))
93 237702 : }
94 237702 : }
95 :
96 237702 : extern "C" fn conn_send_query(sk: *mut Safekeeper, query: *mut ::std::os::raw::c_char) -> bool {
97 237702 : let query = unsafe { CStr::from_ptr(query) };
98 237702 : let query = query.to_str().unwrap();
99 237702 :
100 237702 : unsafe {
101 237702 : let callback_data = (*(*(*sk).wp).config).callback_data;
102 237702 : let api = callback_data as *mut Box<dyn ApiImpl>;
103 237702 : (*api).conn_send_query(&mut (*sk), query)
104 237702 : }
105 237702 : }
106 :
107 237702 : extern "C" fn conn_get_query_result(sk: *mut Safekeeper) -> WalProposerExecStatusType {
108 237702 : unsafe {
109 237702 : let callback_data = (*(*(*sk).wp).config).callback_data;
110 237702 : let api = callback_data as *mut Box<dyn ApiImpl>;
111 237702 : (*api).conn_get_query_result(&mut (*sk))
112 237702 : }
113 237702 : }
114 :
115 0 : extern "C" fn conn_flush(sk: *mut Safekeeper) -> ::std::os::raw::c_int {
116 0 : unsafe {
117 0 : let callback_data = (*(*(*sk).wp).config).callback_data;
118 0 : let api = callback_data as *mut Box<dyn ApiImpl>;
119 0 : (*api).conn_flush(&mut (*sk))
120 0 : }
121 0 : }
122 :
123 88000 : extern "C" fn conn_finish(sk: *mut Safekeeper) {
124 88000 : unsafe {
125 88000 : let callback_data = (*(*(*sk).wp).config).callback_data;
126 88000 : let api = callback_data as *mut Box<dyn ApiImpl>;
127 88000 : (*api).conn_finish(&mut (*sk))
128 88000 : }
129 88000 : }
130 :
131 130674 : extern "C" fn conn_async_read(
132 130674 : sk: *mut Safekeeper,
133 130674 : buf: *mut *mut ::std::os::raw::c_char,
134 130674 : amount: *mut ::std::os::raw::c_int,
135 130674 : ) -> PGAsyncReadResult {
136 130674 : unsafe {
137 130674 : let callback_data = (*(*(*sk).wp).config).callback_data;
138 130674 : let api = callback_data as *mut Box<dyn ApiImpl>;
139 130674 :
140 130674 : // This function has guarantee that returned buf will be valid until
141 130674 : // the next call. So we can store a Vec in each Safekeeper and reuse
142 130674 : // it on the next call.
143 130674 : let mut inbuf = take_vec_u8(&mut (*sk).inbuf).unwrap_or_default();
144 130674 : inbuf.clear();
145 130674 :
146 130674 : let result = (*api).conn_async_read(&mut (*sk), &mut inbuf);
147 130674 :
148 130674 : // Put a Vec back to sk->inbuf and return data ptr.
149 130674 : *amount = inbuf.len() as i32;
150 130674 : *buf = store_vec_u8(&mut (*sk).inbuf, inbuf);
151 130674 :
152 130674 : result
153 130674 : }
154 130674 : }
155 :
156 30658 : extern "C" fn conn_async_write(
157 30658 : sk: *mut Safekeeper,
158 30658 : buf: *const ::std::os::raw::c_void,
159 30658 : size: usize,
160 30658 : ) -> PGAsyncWriteResult {
161 30658 : unsafe {
162 30658 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
163 30658 : let callback_data = (*(*(*sk).wp).config).callback_data;
164 30658 : let api = callback_data as *mut Box<dyn ApiImpl>;
165 30658 : (*api).conn_async_write(&mut (*sk), buf)
166 30658 : }
167 30658 : }
168 :
169 265730 : extern "C" fn conn_blocking_write(
170 265730 : sk: *mut Safekeeper,
171 265730 : buf: *const ::std::os::raw::c_void,
172 265730 : size: usize,
173 265730 : ) -> bool {
174 265730 : unsafe {
175 265730 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
176 265730 : let callback_data = (*(*(*sk).wp).config).callback_data;
177 265730 : let api = callback_data as *mut Box<dyn ApiImpl>;
178 265730 : (*api).conn_blocking_write(&mut (*sk), buf)
179 265730 : }
180 265730 : }
181 :
182 5337 : extern "C" fn recovery_download(wp: *mut WalProposer, sk: *mut Safekeeper) -> bool {
183 5337 : unsafe {
184 5337 : let callback_data = (*(*(*sk).wp).config).callback_data;
185 5337 : let api = callback_data as *mut Box<dyn ApiImpl>;
186 5337 :
187 5337 : // currently `recovery_download` is always called right after election
188 5337 : (*api).after_election(&mut (*wp));
189 5337 :
190 5337 : (*api).recovery_download(&mut (*wp), &mut (*sk))
191 5337 : }
192 5337 : }
193 :
194 7078 : extern "C" fn wal_reader_allocate(sk: *mut Safekeeper) {
195 7078 : unsafe {
196 7078 : let callback_data = (*(*(*sk).wp).config).callback_data;
197 7078 : let api = callback_data as *mut Box<dyn ApiImpl>;
198 7078 : (*api).wal_reader_allocate(&mut (*sk));
199 7078 : }
200 7078 : }
201 :
202 : #[allow(clippy::unnecessary_cast)]
203 23580 : extern "C" fn wal_read(
204 23580 : sk: *mut Safekeeper,
205 23580 : buf: *mut ::std::os::raw::c_char,
206 23580 : startptr: XLogRecPtr,
207 23580 : count: Size,
208 23580 : _errmsg: *mut *mut ::std::os::raw::c_char,
209 23580 : ) -> NeonWALReadResult {
210 23580 : unsafe {
211 23580 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, count);
212 23580 : let callback_data = (*(*(*sk).wp).config).callback_data;
213 23580 : let api = callback_data as *mut Box<dyn ApiImpl>;
214 23580 : // TODO: errmsg is not forwarded
215 23580 : (*api).wal_read(&mut (*sk), buf, startptr)
216 23580 : }
217 23580 : }
218 :
219 97378 : extern "C" fn wal_reader_events(sk: *mut Safekeeper) -> uint32 {
220 97378 : unsafe {
221 97378 : let callback_data = (*(*(*sk).wp).config).callback_data;
222 97378 : let api = callback_data as *mut Box<dyn ApiImpl>;
223 97378 : (*api).wal_reader_events(&mut (*sk))
224 97378 : }
225 97378 : }
226 :
227 71659 : extern "C" fn init_event_set(wp: *mut WalProposer) {
228 71659 : unsafe {
229 71659 : let callback_data = (*(*wp).config).callback_data;
230 71659 : let api = callback_data as *mut Box<dyn ApiImpl>;
231 71659 : (*api).init_event_set(&mut (*wp));
232 71659 : }
233 71659 : }
234 :
235 523940 : extern "C" fn update_event_set(sk: *mut Safekeeper, events: uint32) {
236 523940 : unsafe {
237 523940 : let callback_data = (*(*(*sk).wp).config).callback_data;
238 523940 : let api = callback_data as *mut Box<dyn ApiImpl>;
239 523940 : (*api).update_event_set(&mut (*sk), events);
240 523940 : }
241 523940 : }
242 :
243 34524 : extern "C" fn active_state_update_event_set(sk: *mut Safekeeper) {
244 34524 : unsafe {
245 34524 : let callback_data = (*(*(*sk).wp).config).callback_data;
246 34524 : let api = callback_data as *mut Box<dyn ApiImpl>;
247 34524 : (*api).active_state_update_event_set(&mut (*sk));
248 34524 : }
249 34524 : }
250 :
251 475404 : extern "C" fn add_safekeeper_event_set(sk: *mut Safekeeper, events: uint32) {
252 475404 : unsafe {
253 475404 : let callback_data = (*(*(*sk).wp).config).callback_data;
254 475404 : let api = callback_data as *mut Box<dyn ApiImpl>;
255 475404 : (*api).add_safekeeper_event_set(&mut (*sk), events);
256 475404 : }
257 475404 : }
258 :
259 299352 : extern "C" fn rm_safekeeper_event_set(sk: *mut Safekeeper) {
260 299352 : unsafe {
261 299352 : let callback_data = (*(*(*sk).wp).config).callback_data;
262 299352 : let api = callback_data as *mut Box<dyn ApiImpl>;
263 299352 : (*api).rm_safekeeper_event_set(&mut (*sk));
264 299352 : }
265 299352 : }
266 :
267 688939 : extern "C" fn wait_event_set(
268 688939 : wp: *mut WalProposer,
269 688939 : timeout: ::std::os::raw::c_long,
270 688939 : event_sk: *mut *mut Safekeeper,
271 688939 : events: *mut uint32,
272 688939 : ) -> ::std::os::raw::c_int {
273 688939 : unsafe {
274 688939 : let callback_data = (*(*wp).config).callback_data;
275 688939 : let api = callback_data as *mut Box<dyn ApiImpl>;
276 688939 : let result = (*api).wait_event_set(&mut (*wp), timeout);
277 688939 : match result {
278 : WaitResult::Latch => {
279 70711 : *event_sk = std::ptr::null_mut();
280 70711 : *events = crate::bindings::WL_LATCH_SET;
281 70711 : 1
282 : }
283 : WaitResult::Timeout => {
284 21843 : *event_sk = std::ptr::null_mut();
285 21843 : // WaitEventSetWait returns 0 for timeout.
286 21843 : *events = 0;
287 21843 : 0
288 : }
289 596385 : WaitResult::Network(sk, event_mask) => {
290 596385 : *event_sk = sk;
291 596385 : *events = event_mask;
292 596385 : 1
293 : }
294 : }
295 : }
296 688939 : }
297 :
298 71659 : extern "C" fn strong_random(
299 71659 : wp: *mut WalProposer,
300 71659 : buf: *mut ::std::os::raw::c_void,
301 71659 : len: usize,
302 71659 : ) -> bool {
303 71659 : unsafe {
304 71659 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, len);
305 71659 : let callback_data = (*(*wp).config).callback_data;
306 71659 : let api = callback_data as *mut Box<dyn ApiImpl>;
307 71659 : (*api).strong_random(buf)
308 71659 : }
309 71659 : }
310 :
311 1961 : extern "C" fn get_redo_start_lsn(wp: *mut WalProposer) -> XLogRecPtr {
312 1961 : unsafe {
313 1961 : let callback_data = (*(*wp).config).callback_data;
314 1961 : let api = callback_data as *mut Box<dyn ApiImpl>;
315 1961 : (*api).get_redo_start_lsn()
316 1961 : }
317 1961 : }
318 :
319 2555 : extern "C" fn finish_sync_safekeepers(wp: *mut WalProposer, lsn: XLogRecPtr) {
320 2555 : unsafe {
321 2555 : let callback_data = (*(*wp).config).callback_data;
322 2555 : let api = callback_data as *mut Box<dyn ApiImpl>;
323 2555 : (*api).finish_sync_safekeepers(lsn)
324 2555 : }
325 2555 : }
326 :
327 11397 : extern "C" fn process_safekeeper_feedback(wp: *mut WalProposer, commit_lsn: XLogRecPtr) {
328 11397 : unsafe {
329 11397 : let callback_data = (*(*wp).config).callback_data;
330 11397 : let api = callback_data as *mut Box<dyn ApiImpl>;
331 11397 : (*api).process_safekeeper_feedback(&mut (*wp), commit_lsn)
332 11397 : }
333 11397 : }
334 :
335 759634 : extern "C" fn log_internal(
336 759634 : wp: *mut WalProposer,
337 759634 : level: ::std::os::raw::c_int,
338 759634 : line: *const ::std::os::raw::c_char,
339 759634 : ) {
340 759634 : unsafe {
341 759634 : let callback_data = (*(*wp).config).callback_data;
342 759634 : let api = callback_data as *mut Box<dyn ApiImpl>;
343 759634 : let line = CStr::from_ptr(line);
344 759634 : let line = line.to_str().unwrap();
345 759634 : (*api).log_internal(&mut (*wp), Level::from(level as u32), line)
346 759634 : }
347 759634 : }
348 :
349 1518711 : #[derive(Debug, PartialEq)]
350 : pub enum Level {
351 : Debug5,
352 : Debug4,
353 : Debug3,
354 : Debug2,
355 : Debug1,
356 : Log,
357 : Info,
358 : Notice,
359 : Warning,
360 : Error,
361 : Fatal,
362 : Panic,
363 : WPEvent,
364 : }
365 :
366 : impl Level {
367 759634 : pub fn from(elevel: u32) -> Level {
368 759634 : use crate::bindings::*;
369 759634 :
370 759634 : match elevel {
371 23580 : DEBUG5 => Level::Debug5,
372 0 : DEBUG4 => Level::Debug4,
373 0 : DEBUG3 => Level::Debug3,
374 71328 : DEBUG2 => Level::Debug2,
375 0 : DEBUG1 => Level::Debug1,
376 576177 : LOG => Level::Log,
377 0 : INFO => Level::Info,
378 0 : NOTICE => Level::Notice,
379 88000 : WARNING => Level::Warning,
380 0 : ERROR => Level::Error,
381 529 : FATAL => Level::Fatal,
382 20 : PANIC => Level::Panic,
383 0 : WPEVENT => Level::WPEvent,
384 0 : _ => panic!("unknown log level {}", elevel),
385 : }
386 759634 : }
387 : }
388 :
389 71659 : pub(crate) fn create_api() -> walproposer_api {
390 71659 : walproposer_api {
391 71659 : get_shmem_state: Some(get_shmem_state),
392 71659 : start_streaming: Some(start_streaming),
393 71659 : get_flush_rec_ptr: Some(get_flush_rec_ptr),
394 71659 : get_current_timestamp: Some(get_current_timestamp),
395 71659 : conn_error_message: Some(conn_error_message),
396 71659 : conn_status: Some(conn_status),
397 71659 : conn_connect_start: Some(conn_connect_start),
398 71659 : conn_connect_poll: Some(conn_connect_poll),
399 71659 : conn_send_query: Some(conn_send_query),
400 71659 : conn_get_query_result: Some(conn_get_query_result),
401 71659 : conn_flush: Some(conn_flush),
402 71659 : conn_finish: Some(conn_finish),
403 71659 : conn_async_read: Some(conn_async_read),
404 71659 : conn_async_write: Some(conn_async_write),
405 71659 : conn_blocking_write: Some(conn_blocking_write),
406 71659 : recovery_download: Some(recovery_download),
407 71659 : wal_reader_allocate: Some(wal_reader_allocate),
408 71659 : wal_read: Some(wal_read),
409 71659 : wal_reader_events: Some(wal_reader_events),
410 71659 : init_event_set: Some(init_event_set),
411 71659 : update_event_set: Some(update_event_set),
412 71659 : active_state_update_event_set: Some(active_state_update_event_set),
413 71659 : add_safekeeper_event_set: Some(add_safekeeper_event_set),
414 71659 : rm_safekeeper_event_set: Some(rm_safekeeper_event_set),
415 71659 : wait_event_set: Some(wait_event_set),
416 71659 : strong_random: Some(strong_random),
417 71659 : get_redo_start_lsn: Some(get_redo_start_lsn),
418 71659 : finish_sync_safekeepers: Some(finish_sync_safekeepers),
419 71659 : process_safekeeper_feedback: Some(process_safekeeper_feedback),
420 71659 : log_internal: Some(log_internal),
421 71659 : }
422 71659 : }
423 :
424 : impl std::fmt::Display for Level {
425 3142 : fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
426 3142 : write!(f, "{:?}", self)
427 3142 : }
428 : }
429 :
430 : /// Take ownership of `Vec<u8>` from StringInfoData.
431 : #[allow(clippy::unnecessary_cast)]
432 345635 : pub(crate) fn take_vec_u8(pg: &mut StringInfoData) -> Option<Vec<u8>> {
433 345635 : if pg.data.is_null() {
434 214971 : return None;
435 130664 : }
436 130664 :
437 130664 : let ptr = pg.data as *mut u8;
438 130664 : let length = pg.len as usize;
439 130664 : let capacity = pg.maxlen as usize;
440 130664 :
441 130664 : pg.data = std::ptr::null_mut();
442 130664 : pg.len = 0;
443 130664 : pg.maxlen = 0;
444 130664 :
445 130664 : unsafe { Some(Vec::from_raw_parts(ptr, length, capacity)) }
446 345635 : }
447 :
448 : /// Store `Vec<u8>` in StringInfoData.
449 130674 : fn store_vec_u8(pg: &mut StringInfoData, vec: Vec<u8>) -> *mut ::std::os::raw::c_char {
450 130674 : let ptr = vec.as_ptr() as *mut ::std::os::raw::c_char;
451 130674 : let length = vec.len();
452 130674 : let capacity = vec.capacity();
453 130674 :
454 130674 : assert!(pg.data.is_null());
455 :
456 130674 : pg.data = ptr;
457 130674 : pg.len = length as i32;
458 130674 : pg.maxlen = capacity as i32;
459 130674 :
460 130674 : std::mem::forget(vec);
461 130674 :
462 130674 : ptr
463 130674 : }
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