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 1264 : extern "C" fn get_shmem_state(wp: *mut WalProposer) -> *mut WalproposerShmemState {
29 1264 : unsafe {
30 1264 : let callback_data = (*(*wp).config).callback_data;
31 1264 : let api = callback_data as *mut Box<dyn ApiImpl>;
32 1264 : (*api).get_shmem_state()
33 1264 : }
34 1264 : }
35 :
36 1214 : extern "C" fn start_streaming(wp: *mut WalProposer, startpos: XLogRecPtr) {
37 1214 : unsafe {
38 1214 : let callback_data = (*(*wp).config).callback_data;
39 1214 : let api = callback_data as *mut Box<dyn ApiImpl>;
40 1214 : let callback = StreamingCallback::new(wp);
41 1214 : (*api).start_streaming(startpos, &callback);
42 1214 : }
43 1214 : }
44 :
45 817 : extern "C" fn get_flush_rec_ptr(wp: *mut WalProposer) -> XLogRecPtr {
46 817 : unsafe {
47 817 : let callback_data = (*(*wp).config).callback_data;
48 817 : let api = callback_data as *mut Box<dyn ApiImpl>;
49 817 : (*api).get_flush_rec_ptr()
50 817 : }
51 817 : }
52 :
53 2534101 : extern "C" fn get_current_timestamp(wp: *mut WalProposer) -> TimestampTz {
54 2534101 : unsafe {
55 2534101 : let callback_data = (*(*wp).config).callback_data;
56 2534101 : let api = callback_data as *mut Box<dyn ApiImpl>;
57 2534101 : (*api).get_current_timestamp()
58 2534101 : }
59 2534101 : }
60 :
61 87390 : extern "C" fn conn_error_message(sk: *mut Safekeeper) -> *mut ::std::os::raw::c_char {
62 87390 : unsafe {
63 87390 : let callback_data = (*(*(*sk).wp).config).callback_data;
64 87390 : let api = callback_data as *mut Box<dyn ApiImpl>;
65 87390 : let msg = (*api).conn_error_message(&mut (*sk));
66 87390 : let msg = CString::new(msg).unwrap();
67 87390 : // TODO: fix leaking error message
68 87390 : msg.into_raw()
69 87390 : }
70 87390 : }
71 :
72 270015 : extern "C" fn conn_status(sk: *mut Safekeeper) -> WalProposerConnStatusType {
73 270015 : unsafe {
74 270015 : let callback_data = (*(*(*sk).wp).config).callback_data;
75 270015 : let api = callback_data as *mut Box<dyn ApiImpl>;
76 270015 : (*api).conn_status(&mut (*sk))
77 270015 : }
78 270015 : }
79 :
80 270015 : extern "C" fn conn_connect_start(sk: *mut Safekeeper) {
81 270015 : unsafe {
82 270015 : let callback_data = (*(*(*sk).wp).config).callback_data;
83 270015 : let api = callback_data as *mut Box<dyn ApiImpl>;
84 270015 : (*api).conn_connect_start(&mut (*sk))
85 270015 : }
86 270015 : }
87 :
88 243151 : extern "C" fn conn_connect_poll(sk: *mut Safekeeper) -> WalProposerConnectPollStatusType {
89 243151 : unsafe {
90 243151 : let callback_data = (*(*(*sk).wp).config).callback_data;
91 243151 : let api = callback_data as *mut Box<dyn ApiImpl>;
92 243151 : (*api).conn_connect_poll(&mut (*sk))
93 243151 : }
94 243151 : }
95 :
96 243151 : extern "C" fn conn_send_query(sk: *mut Safekeeper, query: *mut ::std::os::raw::c_char) -> bool {
97 243151 : let query = unsafe { CStr::from_ptr(query) };
98 243151 : let query = query.to_str().unwrap();
99 243151 :
100 243151 : unsafe {
101 243151 : let callback_data = (*(*(*sk).wp).config).callback_data;
102 243151 : let api = callback_data as *mut Box<dyn ApiImpl>;
103 243151 : (*api).conn_send_query(&mut (*sk), query)
104 243151 : }
105 243151 : }
106 :
107 243151 : extern "C" fn conn_get_query_result(sk: *mut Safekeeper) -> WalProposerExecStatusType {
108 243151 : unsafe {
109 243151 : let callback_data = (*(*(*sk).wp).config).callback_data;
110 243151 : let api = callback_data as *mut Box<dyn ApiImpl>;
111 243151 : (*api).conn_get_query_result(&mut (*sk))
112 243151 : }
113 243151 : }
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 89522 : extern "C" fn conn_finish(sk: *mut Safekeeper) {
124 89522 : unsafe {
125 89522 : let callback_data = (*(*(*sk).wp).config).callback_data;
126 89522 : let api = callback_data as *mut Box<dyn ApiImpl>;
127 89522 : (*api).conn_finish(&mut (*sk))
128 89522 : }
129 89522 : }
130 :
131 136617 : extern "C" fn conn_async_read(
132 136617 : sk: *mut Safekeeper,
133 136617 : buf: *mut *mut ::std::os::raw::c_char,
134 136617 : amount: *mut ::std::os::raw::c_int,
135 136617 : ) -> PGAsyncReadResult {
136 136617 : unsafe {
137 136617 : let callback_data = (*(*(*sk).wp).config).callback_data;
138 136617 : let api = callback_data as *mut Box<dyn ApiImpl>;
139 136617 :
140 136617 : // This function has guarantee that returned buf will be valid until
141 136617 : // the next call. So we can store a Vec in each Safekeeper and reuse
142 136617 : // it on the next call.
143 136617 : let mut inbuf = take_vec_u8(&mut (*sk).inbuf).unwrap_or_default();
144 136617 : inbuf.clear();
145 136617 :
146 136617 : let result = (*api).conn_async_read(&mut (*sk), &mut inbuf);
147 136617 :
148 136617 : // Put a Vec back to sk->inbuf and return data ptr.
149 136617 : *amount = inbuf.len() as i32;
150 136617 : *buf = store_vec_u8(&mut (*sk).inbuf, inbuf);
151 136617 :
152 136617 : result
153 136617 : }
154 136617 : }
155 :
156 33923 : extern "C" fn conn_async_write(
157 33923 : sk: *mut Safekeeper,
158 33923 : buf: *const ::std::os::raw::c_void,
159 33923 : size: usize,
160 33923 : ) -> PGAsyncWriteResult {
161 33923 : unsafe {
162 33923 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
163 33923 : let callback_data = (*(*(*sk).wp).config).callback_data;
164 33923 : let api = callback_data as *mut Box<dyn ApiImpl>;
165 33923 : (*api).conn_async_write(&mut (*sk), buf)
166 33923 : }
167 33923 : }
168 :
169 272090 : extern "C" fn conn_blocking_write(
170 272090 : sk: *mut Safekeeper,
171 272090 : buf: *const ::std::os::raw::c_void,
172 272090 : size: usize,
173 272090 : ) -> bool {
174 272090 : unsafe {
175 272090 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
176 272090 : let callback_data = (*(*(*sk).wp).config).callback_data;
177 272090 : let api = callback_data as *mut Box<dyn ApiImpl>;
178 272090 : (*api).conn_blocking_write(&mut (*sk), buf)
179 272090 : }
180 272090 : }
181 :
182 5635 : extern "C" fn recovery_download(wp: *mut WalProposer, sk: *mut Safekeeper) -> bool {
183 5635 : unsafe {
184 5635 : let callback_data = (*(*(*sk).wp).config).callback_data;
185 5635 : let api = callback_data as *mut Box<dyn ApiImpl>;
186 5635 :
187 5635 : // currently `recovery_download` is always called right after election
188 5635 : (*api).after_election(&mut (*wp));
189 5635 :
190 5635 : (*api).recovery_download(&mut (*wp), &mut (*sk))
191 5635 : }
192 5635 : }
193 :
194 7643 : extern "C" fn wal_reader_allocate(sk: *mut Safekeeper) {
195 7643 : unsafe {
196 7643 : let callback_data = (*(*(*sk).wp).config).callback_data;
197 7643 : let api = callback_data as *mut Box<dyn ApiImpl>;
198 7643 : (*api).wal_reader_allocate(&mut (*sk));
199 7643 : }
200 7643 : }
201 :
202 : #[allow(clippy::unnecessary_cast)]
203 26280 : extern "C" fn wal_read(
204 26280 : sk: *mut Safekeeper,
205 26280 : buf: *mut ::std::os::raw::c_char,
206 26280 : startptr: XLogRecPtr,
207 26280 : count: Size,
208 26280 : _errmsg: *mut *mut ::std::os::raw::c_char,
209 26280 : ) -> NeonWALReadResult {
210 26280 : unsafe {
211 26280 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, count);
212 26280 : let callback_data = (*(*(*sk).wp).config).callback_data;
213 26280 : let api = callback_data as *mut Box<dyn ApiImpl>;
214 26280 : // TODO: errmsg is not forwarded
215 26280 : (*api).wal_read(&mut (*sk), buf, startptr)
216 26280 : }
217 26280 : }
218 :
219 110114 : extern "C" fn wal_reader_events(sk: *mut Safekeeper) -> uint32 {
220 110114 : unsafe {
221 110114 : let callback_data = (*(*(*sk).wp).config).callback_data;
222 110114 : let api = callback_data as *mut Box<dyn ApiImpl>;
223 110114 : (*api).wal_reader_events(&mut (*sk))
224 110114 : }
225 110114 : }
226 :
227 73356 : extern "C" fn init_event_set(wp: *mut WalProposer) {
228 73356 : unsafe {
229 73356 : let callback_data = (*(*wp).config).callback_data;
230 73356 : let api = callback_data as *mut Box<dyn ApiImpl>;
231 73356 : (*api).init_event_set(&mut (*wp));
232 73356 : }
233 73356 : }
234 :
235 536298 : extern "C" fn update_event_set(sk: *mut Safekeeper, events: uint32) {
236 536298 : unsafe {
237 536298 : let callback_data = (*(*(*sk).wp).config).callback_data;
238 536298 : let api = callback_data as *mut Box<dyn ApiImpl>;
239 536298 : (*api).update_event_set(&mut (*sk), events);
240 536298 : }
241 536298 : }
242 :
243 38816 : extern "C" fn active_state_update_event_set(sk: *mut Safekeeper) {
244 38816 : unsafe {
245 38816 : let callback_data = (*(*(*sk).wp).config).callback_data;
246 38816 : let api = callback_data as *mut Box<dyn ApiImpl>;
247 38816 : (*api).active_state_update_event_set(&mut (*sk));
248 38816 : }
249 38816 : }
250 :
251 486302 : extern "C" fn add_safekeeper_event_set(sk: *mut Safekeeper, events: uint32) {
252 486302 : unsafe {
253 486302 : let callback_data = (*(*(*sk).wp).config).callback_data;
254 486302 : let api = callback_data as *mut Box<dyn ApiImpl>;
255 486302 : (*api).add_safekeeper_event_set(&mut (*sk), events);
256 486302 : }
257 486302 : }
258 :
259 305809 : extern "C" fn rm_safekeeper_event_set(sk: *mut Safekeeper) {
260 305809 : unsafe {
261 305809 : let callback_data = (*(*(*sk).wp).config).callback_data;
262 305809 : let api = callback_data as *mut Box<dyn ApiImpl>;
263 305809 : (*api).rm_safekeeper_event_set(&mut (*sk));
264 305809 : }
265 305809 : }
266 :
267 706115 : extern "C" fn wait_event_set(
268 706115 : wp: *mut WalProposer,
269 706115 : timeout: ::std::os::raw::c_long,
270 706115 : event_sk: *mut *mut Safekeeper,
271 706115 : events: *mut uint32,
272 706115 : ) -> ::std::os::raw::c_int {
273 706115 : unsafe {
274 706115 : let callback_data = (*(*wp).config).callback_data;
275 706115 : let api = callback_data as *mut Box<dyn ApiImpl>;
276 706115 : let result = (*api).wait_event_set(&mut (*wp), timeout);
277 706115 : match result {
278 : WaitResult::Latch => {
279 72549 : *event_sk = std::ptr::null_mut();
280 72549 : *events = crate::bindings::WL_LATCH_SET;
281 72549 : 1
282 : }
283 : WaitResult::Timeout => {
284 22113 : *event_sk = std::ptr::null_mut();
285 22113 : // WaitEventSetWait returns 0 for timeout.
286 22113 : *events = 0;
287 22113 : 0
288 : }
289 611453 : WaitResult::Network(sk, event_mask) => {
290 611453 : *event_sk = sk;
291 611453 : *events = event_mask;
292 611453 : 1
293 : }
294 : }
295 : }
296 706115 : }
297 :
298 73356 : extern "C" fn strong_random(
299 73356 : wp: *mut WalProposer,
300 73356 : buf: *mut ::std::os::raw::c_void,
301 73356 : len: usize,
302 73356 : ) -> bool {
303 73356 : unsafe {
304 73356 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, len);
305 73356 : let callback_data = (*(*wp).config).callback_data;
306 73356 : let api = callback_data as *mut Box<dyn ApiImpl>;
307 73356 : (*api).strong_random(buf)
308 73356 : }
309 73356 : }
310 :
311 2086 : extern "C" fn get_redo_start_lsn(wp: *mut WalProposer) -> XLogRecPtr {
312 2086 : unsafe {
313 2086 : let callback_data = (*(*wp).config).callback_data;
314 2086 : let api = callback_data as *mut Box<dyn ApiImpl>;
315 2086 : (*api).get_redo_start_lsn()
316 2086 : }
317 2086 : }
318 :
319 2759 : extern "C" fn finish_sync_safekeepers(wp: *mut WalProposer, lsn: XLogRecPtr) {
320 2759 : unsafe {
321 2759 : let callback_data = (*(*wp).config).callback_data;
322 2759 : let api = callback_data as *mut Box<dyn ApiImpl>;
323 2759 : (*api).finish_sync_safekeepers(lsn)
324 2759 : }
325 2759 : }
326 :
327 13032 : extern "C" fn process_safekeeper_feedback(wp: *mut WalProposer, commit_lsn: XLogRecPtr) {
328 13032 : unsafe {
329 13032 : let callback_data = (*(*wp).config).callback_data;
330 13032 : let api = callback_data as *mut Box<dyn ApiImpl>;
331 13032 : (*api).process_safekeeper_feedback(&mut (*wp), commit_lsn)
332 13032 : }
333 13032 : }
334 :
335 788304 : extern "C" fn log_internal(
336 788304 : wp: *mut WalProposer,
337 788304 : level: ::std::os::raw::c_int,
338 788304 : line: *const ::std::os::raw::c_char,
339 788304 : ) {
340 788304 : unsafe {
341 788304 : let callback_data = (*(*wp).config).callback_data;
342 788304 : let api = callback_data as *mut Box<dyn ApiImpl>;
343 788304 : let line = CStr::from_ptr(line);
344 788304 : let line = line.to_str().unwrap();
345 788304 : (*api).log_internal(&mut (*wp), Level::from(level as u32), line)
346 788304 : }
347 788304 : }
348 :
349 1576105 : #[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 788304 : pub fn from(elevel: u32) -> Level {
368 788304 : use crate::bindings::*;
369 788304 :
370 788304 : match elevel {
371 26280 : DEBUG5 => Level::Debug5,
372 0 : DEBUG4 => Level::Debug4,
373 0 : DEBUG3 => Level::Debug3,
374 81306 : DEBUG2 => Level::Debug2,
375 0 : DEBUG1 => Level::Debug1,
376 590699 : LOG => Level::Log,
377 0 : INFO => Level::Info,
378 0 : NOTICE => Level::Notice,
379 89522 : WARNING => Level::Warning,
380 0 : ERROR => Level::Error,
381 475 : FATAL => Level::Fatal,
382 22 : PANIC => Level::Panic,
383 0 : WPEVENT => Level::WPEvent,
384 0 : _ => panic!("unknown log level {}", elevel),
385 : }
386 788304 : }
387 : }
388 :
389 73356 : pub(crate) fn create_api() -> walproposer_api {
390 73356 : walproposer_api {
391 73356 : get_shmem_state: Some(get_shmem_state),
392 73356 : start_streaming: Some(start_streaming),
393 73356 : get_flush_rec_ptr: Some(get_flush_rec_ptr),
394 73356 : get_current_timestamp: Some(get_current_timestamp),
395 73356 : conn_error_message: Some(conn_error_message),
396 73356 : conn_status: Some(conn_status),
397 73356 : conn_connect_start: Some(conn_connect_start),
398 73356 : conn_connect_poll: Some(conn_connect_poll),
399 73356 : conn_send_query: Some(conn_send_query),
400 73356 : conn_get_query_result: Some(conn_get_query_result),
401 73356 : conn_flush: Some(conn_flush),
402 73356 : conn_finish: Some(conn_finish),
403 73356 : conn_async_read: Some(conn_async_read),
404 73356 : conn_async_write: Some(conn_async_write),
405 73356 : conn_blocking_write: Some(conn_blocking_write),
406 73356 : recovery_download: Some(recovery_download),
407 73356 : wal_reader_allocate: Some(wal_reader_allocate),
408 73356 : wal_read: Some(wal_read),
409 73356 : wal_reader_events: Some(wal_reader_events),
410 73356 : init_event_set: Some(init_event_set),
411 73356 : update_event_set: Some(update_event_set),
412 73356 : active_state_update_event_set: Some(active_state_update_event_set),
413 73356 : add_safekeeper_event_set: Some(add_safekeeper_event_set),
414 73356 : rm_safekeeper_event_set: Some(rm_safekeeper_event_set),
415 73356 : wait_event_set: Some(wait_event_set),
416 73356 : strong_random: Some(strong_random),
417 73356 : get_redo_start_lsn: Some(get_redo_start_lsn),
418 73356 : finish_sync_safekeepers: Some(finish_sync_safekeepers),
419 73356 : process_safekeeper_feedback: Some(process_safekeeper_feedback),
420 73356 : log_internal: Some(log_internal),
421 73356 : }
422 73356 : }
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 356669 : pub(crate) fn take_vec_u8(pg: &mut StringInfoData) -> Option<Vec<u8>> {
433 356669 : if pg.data.is_null() {
434 220062 : return None;
435 136607 : }
436 136607 :
437 136607 : let ptr = pg.data as *mut u8;
438 136607 : let length = pg.len as usize;
439 136607 : let capacity = pg.maxlen as usize;
440 136607 :
441 136607 : pg.data = std::ptr::null_mut();
442 136607 : pg.len = 0;
443 136607 : pg.maxlen = 0;
444 136607 :
445 136607 : unsafe { Some(Vec::from_raw_parts(ptr, length, capacity)) }
446 356669 : }
447 :
448 : /// Store `Vec<u8>` in StringInfoData.
449 136617 : fn store_vec_u8(pg: &mut StringInfoData, vec: Vec<u8>) -> *mut ::std::os::raw::c_char {
450 136617 : let ptr = vec.as_ptr() as *mut ::std::os::raw::c_char;
451 136617 : let length = vec.len();
452 136617 : let capacity = vec.capacity();
453 136617 :
454 136617 : assert!(pg.data.is_null());
455 :
456 136617 : pg.data = ptr;
457 136617 : pg.len = length as i32;
458 136617 : pg.maxlen = capacity as i32;
459 136617 :
460 136617 : std::mem::forget(vec);
461 136617 :
462 136617 : ptr
463 136617 : }
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