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, CString};
7 :
8 : use crate::bindings::{
9 : NeonWALReadResult, PGAsyncReadResult, PGAsyncWriteResult, Safekeeper, Size, StringInfoData,
10 : TimestampTz, WalProposer, WalProposerConnStatusType, WalProposerConnectPollStatusType,
11 : WalProposerExecStatusType, WalproposerShmemState, XLogRecPtr, uint32, walproposer_api,
12 : };
13 : use crate::walproposer::{ApiImpl, StreamingCallback, WaitResult};
14 :
15 810 : extern "C" fn get_shmem_state(wp: *mut WalProposer) -> *mut WalproposerShmemState {
16 : unsafe {
17 810 : let callback_data = (*(*wp).config).callback_data;
18 810 : let api = callback_data as *mut Box<dyn ApiImpl>;
19 810 : (*api).get_shmem_state()
20 : }
21 810 : }
22 :
23 111 : extern "C-unwind" fn start_streaming(wp: *mut WalProposer, startpos: XLogRecPtr) {
24 111 : unsafe {
25 111 : let callback_data = (*(*wp).config).callback_data;
26 111 : let api = callback_data as *mut Box<dyn ApiImpl>;
27 111 : let callback = StreamingCallback::new(wp);
28 111 : (*api).start_streaming(startpos, &callback);
29 111 : }
30 111 : }
31 :
32 108 : extern "C" fn get_flush_rec_ptr(wp: *mut WalProposer) -> XLogRecPtr {
33 : unsafe {
34 108 : let callback_data = (*(*wp).config).callback_data;
35 108 : let api = callback_data as *mut Box<dyn ApiImpl>;
36 108 : (*api).get_flush_rec_ptr()
37 : }
38 108 : }
39 :
40 689 : extern "C" fn update_donor(wp: *mut WalProposer, donor: *mut Safekeeper, donor_lsn: XLogRecPtr) {
41 : unsafe {
42 689 : let callback_data = (*(*wp).config).callback_data;
43 689 : let api = callback_data as *mut Box<dyn ApiImpl>;
44 689 : (*api).update_donor(&mut (*donor), donor_lsn)
45 : }
46 689 : }
47 :
48 322444 : extern "C" fn get_current_timestamp(wp: *mut WalProposer) -> TimestampTz {
49 : unsafe {
50 322444 : let callback_data = (*(*wp).config).callback_data;
51 322444 : let api = callback_data as *mut Box<dyn ApiImpl>;
52 322444 : (*api).get_current_timestamp()
53 : }
54 322444 : }
55 :
56 11810 : extern "C" fn conn_error_message(sk: *mut Safekeeper) -> *mut ::std::os::raw::c_char {
57 : unsafe {
58 11810 : let callback_data = (*(*(*sk).wp).config).callback_data;
59 11810 : let api = callback_data as *mut Box<dyn ApiImpl>;
60 11810 : let msg = (*api).conn_error_message(&mut (*sk));
61 11810 : let msg = CString::new(msg).unwrap();
62 : // TODO: fix leaking error message
63 11810 : msg.into_raw()
64 : }
65 11810 : }
66 :
67 34213 : extern "C" fn conn_status(sk: *mut Safekeeper) -> WalProposerConnStatusType {
68 : unsafe {
69 34213 : let callback_data = (*(*(*sk).wp).config).callback_data;
70 34213 : let api = callback_data as *mut Box<dyn ApiImpl>;
71 34213 : (*api).conn_status(&mut (*sk))
72 : }
73 34213 : }
74 :
75 34213 : extern "C" fn conn_connect_start(sk: *mut Safekeeper) {
76 : unsafe {
77 34213 : let callback_data = (*(*(*sk).wp).config).callback_data;
78 34213 : let api = callback_data as *mut Box<dyn ApiImpl>;
79 34213 : (*api).conn_connect_start(&mut (*sk))
80 : }
81 34213 : }
82 :
83 30809 : extern "C" fn conn_connect_poll(sk: *mut Safekeeper) -> WalProposerConnectPollStatusType {
84 : unsafe {
85 30809 : let callback_data = (*(*(*sk).wp).config).callback_data;
86 30809 : let api = callback_data as *mut Box<dyn ApiImpl>;
87 30809 : (*api).conn_connect_poll(&mut (*sk))
88 : }
89 30809 : }
90 :
91 30809 : extern "C" fn conn_send_query(sk: *mut Safekeeper, query: *mut ::std::os::raw::c_char) -> bool {
92 30809 : let query = unsafe { CStr::from_ptr(query) };
93 30809 : let query = query.to_str().unwrap();
94 :
95 : unsafe {
96 30809 : let callback_data = (*(*(*sk).wp).config).callback_data;
97 30809 : let api = callback_data as *mut Box<dyn ApiImpl>;
98 30809 : (*api).conn_send_query(&mut (*sk), query)
99 : }
100 30809 : }
101 :
102 30809 : extern "C" fn conn_get_query_result(sk: *mut Safekeeper) -> WalProposerExecStatusType {
103 : unsafe {
104 30809 : let callback_data = (*(*(*sk).wp).config).callback_data;
105 30809 : let api = callback_data as *mut Box<dyn ApiImpl>;
106 30809 : (*api).conn_get_query_result(&mut (*sk))
107 : }
108 30809 : }
109 :
110 0 : extern "C" fn conn_flush(sk: *mut Safekeeper) -> ::std::os::raw::c_int {
111 : unsafe {
112 0 : let callback_data = (*(*(*sk).wp).config).callback_data;
113 0 : let api = callback_data as *mut Box<dyn ApiImpl>;
114 0 : (*api).conn_flush(&mut (*sk))
115 : }
116 0 : }
117 :
118 12178 : extern "C" fn conn_finish(sk: *mut Safekeeper) {
119 : unsafe {
120 12178 : let callback_data = (*(*(*sk).wp).config).callback_data;
121 12178 : let api = callback_data as *mut Box<dyn ApiImpl>;
122 12178 : (*api).conn_finish(&mut (*sk))
123 : }
124 12178 : }
125 :
126 17990 : extern "C" fn conn_async_read(
127 17990 : sk: *mut Safekeeper,
128 17990 : buf: *mut *mut ::std::os::raw::c_char,
129 17990 : amount: *mut ::std::os::raw::c_int,
130 17990 : ) -> PGAsyncReadResult {
131 : unsafe {
132 17990 : let callback_data = (*(*(*sk).wp).config).callback_data;
133 17990 : let api = callback_data as *mut Box<dyn ApiImpl>;
134 :
135 : // This function has guarantee that returned buf will be valid until
136 : // the next call. So we can store a Vec in each Safekeeper and reuse
137 : // it on the next call.
138 17990 : let mut inbuf = take_vec_u8(&mut (*sk).inbuf).unwrap_or_default();
139 17990 : inbuf.clear();
140 :
141 17990 : let result = (*api).conn_async_read(&mut (*sk), &mut inbuf);
142 :
143 : // Put a Vec back to sk->inbuf and return data ptr.
144 17990 : *amount = inbuf.len() as i32;
145 17990 : *buf = store_vec_u8(&mut (*sk).inbuf, inbuf);
146 :
147 17990 : result
148 : }
149 17990 : }
150 :
151 4220 : extern "C" fn conn_async_write(
152 4220 : sk: *mut Safekeeper,
153 4220 : buf: *const ::std::os::raw::c_void,
154 4220 : size: usize,
155 4220 : ) -> PGAsyncWriteResult {
156 : unsafe {
157 4220 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
158 4220 : let callback_data = (*(*(*sk).wp).config).callback_data;
159 4220 : let api = callback_data as *mut Box<dyn ApiImpl>;
160 4220 : (*api).conn_async_write(&mut (*sk), buf)
161 : }
162 4220 : }
163 :
164 34091 : extern "C" fn conn_blocking_write(
165 34091 : sk: *mut Safekeeper,
166 34091 : buf: *const ::std::os::raw::c_void,
167 34091 : size: usize,
168 34091 : ) -> bool {
169 : unsafe {
170 34091 : let buf = std::slice::from_raw_parts(buf as *const u8, size);
171 34091 : let callback_data = (*(*(*sk).wp).config).callback_data;
172 34091 : let api = callback_data as *mut Box<dyn ApiImpl>;
173 34091 : (*api).conn_blocking_write(&mut (*sk), buf)
174 : }
175 34091 : }
176 :
177 401 : extern "C-unwind" fn recovery_download(wp: *mut WalProposer, sk: *mut Safekeeper) -> bool {
178 : unsafe {
179 401 : let callback_data = (*(*(*sk).wp).config).callback_data;
180 401 : let api = callback_data as *mut Box<dyn ApiImpl>;
181 :
182 : // currently `recovery_download` is always called right after election
183 401 : (*api).after_election(&mut (*wp));
184 :
185 401 : (*api).recovery_download(&mut (*wp), &mut (*sk))
186 : }
187 401 : }
188 :
189 698 : extern "C" fn wal_reader_allocate(sk: *mut Safekeeper) {
190 698 : unsafe {
191 698 : let callback_data = (*(*(*sk).wp).config).callback_data;
192 698 : let api = callback_data as *mut Box<dyn ApiImpl>;
193 698 : (*api).wal_reader_allocate(&mut (*sk));
194 698 : }
195 698 : }
196 :
197 : #[allow(clippy::unnecessary_cast)]
198 1054 : extern "C" fn wal_read(
199 1054 : sk: *mut Safekeeper,
200 1054 : buf: *mut ::std::os::raw::c_char,
201 1054 : startptr: XLogRecPtr,
202 1054 : count: Size,
203 1054 : _errmsg: *mut *mut ::std::os::raw::c_char,
204 1054 : ) -> NeonWALReadResult {
205 : unsafe {
206 1054 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, count);
207 1054 : let callback_data = (*(*(*sk).wp).config).callback_data;
208 1054 : let api = callback_data as *mut Box<dyn ApiImpl>;
209 : // TODO: errmsg is not forwarded
210 1054 : (*api).wal_read(&mut (*sk), buf, startptr)
211 : }
212 1054 : }
213 :
214 16403 : extern "C" fn wal_reader_events(sk: *mut Safekeeper) -> uint32 {
215 : unsafe {
216 16403 : let callback_data = (*(*(*sk).wp).config).callback_data;
217 16403 : let api = callback_data as *mut Box<dyn ApiImpl>;
218 16403 : (*api).wal_reader_events(&mut (*sk))
219 : }
220 16403 : }
221 :
222 9162 : extern "C" fn init_event_set(wp: *mut WalProposer) {
223 9162 : unsafe {
224 9162 : let callback_data = (*(*wp).config).callback_data;
225 9162 : let api = callback_data as *mut Box<dyn ApiImpl>;
226 9162 : (*api).init_event_set(&mut (*wp));
227 9162 : }
228 9162 : }
229 :
230 66695 : extern "C" fn update_event_set(sk: *mut Safekeeper, events: uint32) {
231 66695 : unsafe {
232 66695 : let callback_data = (*(*(*sk).wp).config).callback_data;
233 66695 : let api = callback_data as *mut Box<dyn ApiImpl>;
234 66695 : (*api).update_event_set(&mut (*sk), events);
235 66695 : }
236 66695 : }
237 :
238 5435 : extern "C" fn active_state_update_event_set(sk: *mut Safekeeper) {
239 5435 : unsafe {
240 5435 : let callback_data = (*(*(*sk).wp).config).callback_data;
241 5435 : let api = callback_data as *mut Box<dyn ApiImpl>;
242 5435 : (*api).active_state_update_event_set(&mut (*sk));
243 5435 : }
244 5435 : }
245 :
246 61618 : extern "C" fn add_safekeeper_event_set(sk: *mut Safekeeper, events: uint32) {
247 61618 : unsafe {
248 61618 : let callback_data = (*(*(*sk).wp).config).callback_data;
249 61618 : let api = callback_data as *mut Box<dyn ApiImpl>;
250 61618 : (*api).add_safekeeper_event_set(&mut (*sk), events);
251 61618 : }
252 61618 : }
253 :
254 39583 : extern "C" fn rm_safekeeper_event_set(sk: *mut Safekeeper) {
255 39583 : unsafe {
256 39583 : let callback_data = (*(*(*sk).wp).config).callback_data;
257 39583 : let api = callback_data as *mut Box<dyn ApiImpl>;
258 39583 : (*api).rm_safekeeper_event_set(&mut (*sk));
259 39583 : }
260 39583 : }
261 :
262 90008 : extern "C-unwind" fn wait_event_set(
263 90008 : wp: *mut WalProposer,
264 90008 : timeout: ::std::os::raw::c_long,
265 90008 : event_sk: *mut *mut Safekeeper,
266 90008 : events: *mut uint32,
267 90008 : ) -> ::std::os::raw::c_int {
268 : unsafe {
269 90008 : let callback_data = (*(*wp).config).callback_data;
270 90008 : let api = callback_data as *mut Box<dyn ApiImpl>;
271 90008 : let result = (*api).wait_event_set(&mut (*wp), timeout);
272 90008 : match result {
273 : WaitResult::Latch => {
274 9268 : *event_sk = std::ptr::null_mut();
275 9268 : *events = crate::bindings::WL_LATCH_SET;
276 9268 : 1
277 : }
278 : WaitResult::Timeout => {
279 2821 : *event_sk = std::ptr::null_mut();
280 : // WaitEventSetWait returns 0 for timeout.
281 2821 : *events = 0;
282 2821 : 0
283 : }
284 77919 : WaitResult::Network(sk, event_mask) => {
285 77919 : *event_sk = sk;
286 77919 : *events = event_mask;
287 77919 : 1
288 : }
289 : }
290 : }
291 90008 : }
292 :
293 0 : extern "C" fn strong_random(
294 0 : wp: *mut WalProposer,
295 0 : buf: *mut ::std::os::raw::c_void,
296 0 : len: usize,
297 0 : ) -> bool {
298 : unsafe {
299 0 : let buf = std::slice::from_raw_parts_mut(buf as *mut u8, len);
300 0 : let callback_data = (*(*wp).config).callback_data;
301 0 : let api = callback_data as *mut Box<dyn ApiImpl>;
302 0 : (*api).strong_random(buf)
303 : }
304 0 : }
305 :
306 186 : extern "C" fn get_redo_start_lsn(wp: *mut WalProposer) -> XLogRecPtr {
307 : unsafe {
308 186 : let callback_data = (*(*wp).config).callback_data;
309 186 : let api = callback_data as *mut Box<dyn ApiImpl>;
310 186 : (*api).get_redo_start_lsn()
311 : }
312 186 : }
313 :
314 286 : unsafe extern "C-unwind" fn finish_sync_safekeepers(wp: *mut WalProposer, lsn: XLogRecPtr) -> ! {
315 : unsafe {
316 286 : let callback_data = (*(*wp).config).callback_data;
317 286 : let api = callback_data as *mut Box<dyn ApiImpl>;
318 286 : (*api).finish_sync_safekeepers(lsn)
319 : }
320 : }
321 :
322 2092 : extern "C" fn process_safekeeper_feedback(wp: *mut WalProposer, sk: *mut Safekeeper) {
323 2092 : unsafe {
324 2092 : let callback_data = (*(*wp).config).callback_data;
325 2092 : let api = callback_data as *mut Box<dyn ApiImpl>;
326 2092 : (*api).process_safekeeper_feedback(&mut (*wp), &mut (*sk));
327 2092 : }
328 2092 : }
329 :
330 151364 : extern "C-unwind" fn log_internal(
331 151364 : wp: *mut WalProposer,
332 151364 : level: ::std::os::raw::c_int,
333 151364 : line: *const ::std::os::raw::c_char,
334 151364 : ) {
335 : unsafe {
336 151364 : let callback_data = (*(*wp).config).callback_data;
337 151364 : let api = callback_data as *mut Box<dyn ApiImpl>;
338 151364 : let line = CStr::from_ptr(line);
339 151364 : let line = line.to_str().unwrap();
340 151364 : (*api).log_internal(&mut (*wp), Level::from(level as u32), line)
341 : }
342 151364 : }
343 :
344 : #[derive(Debug, PartialEq)]
345 : pub enum Level {
346 : Debug5,
347 : Debug4,
348 : Debug3,
349 : Debug2,
350 : Debug1,
351 : Log,
352 : Info,
353 : Notice,
354 : Warning,
355 : Error,
356 : Fatal,
357 : Panic,
358 : WPEvent,
359 : }
360 :
361 : impl Level {
362 151364 : pub fn from(elevel: u32) -> Level {
363 : use crate::bindings::*;
364 :
365 151364 : match elevel {
366 3522 : DEBUG5 => Level::Debug5,
367 0 : DEBUG4 => Level::Debug4,
368 0 : DEBUG3 => Level::Debug3,
369 2092 : DEBUG2 => Level::Debug2,
370 0 : DEBUG1 => Level::Debug1,
371 132212 : LOG => Level::Log,
372 0 : INFO => Level::Info,
373 0 : NOTICE => Level::Notice,
374 13468 : WARNING => Level::Warning,
375 0 : ERROR => Level::Error,
376 66 : FATAL => Level::Fatal,
377 4 : PANIC => Level::Panic,
378 0 : WPEVENT => Level::WPEvent,
379 0 : _ => panic!("unknown log level {elevel}"),
380 : }
381 151364 : }
382 : }
383 :
384 9162 : pub(crate) fn create_api() -> walproposer_api {
385 9162 : walproposer_api {
386 9162 : get_shmem_state: Some(get_shmem_state),
387 9162 : start_streaming: Some(start_streaming),
388 9162 : get_flush_rec_ptr: Some(get_flush_rec_ptr),
389 9162 : update_donor: Some(update_donor),
390 9162 : get_current_timestamp: Some(get_current_timestamp),
391 9162 : conn_error_message: Some(conn_error_message),
392 9162 : conn_status: Some(conn_status),
393 9162 : conn_connect_start: Some(conn_connect_start),
394 9162 : conn_connect_poll: Some(conn_connect_poll),
395 9162 : conn_send_query: Some(conn_send_query),
396 9162 : conn_get_query_result: Some(conn_get_query_result),
397 9162 : conn_flush: Some(conn_flush),
398 9162 : conn_finish: Some(conn_finish),
399 9162 : conn_async_read: Some(conn_async_read),
400 9162 : conn_async_write: Some(conn_async_write),
401 9162 : conn_blocking_write: Some(conn_blocking_write),
402 9162 : recovery_download: Some(recovery_download),
403 9162 : wal_reader_allocate: Some(wal_reader_allocate),
404 9162 : wal_read: Some(wal_read),
405 9162 : wal_reader_events: Some(wal_reader_events),
406 9162 : init_event_set: Some(init_event_set),
407 9162 : update_event_set: Some(update_event_set),
408 9162 : active_state_update_event_set: Some(active_state_update_event_set),
409 9162 : add_safekeeper_event_set: Some(add_safekeeper_event_set),
410 9162 : rm_safekeeper_event_set: Some(rm_safekeeper_event_set),
411 9162 : wait_event_set: Some(wait_event_set),
412 9162 : strong_random: Some(strong_random),
413 9162 : get_redo_start_lsn: Some(get_redo_start_lsn),
414 9162 : finish_sync_safekeepers: Some(finish_sync_safekeepers),
415 9162 : process_safekeeper_feedback: Some(process_safekeeper_feedback),
416 9162 : log_internal: Some(log_internal),
417 9162 : }
418 9162 : }
419 :
420 9162 : pub fn empty_shmem() -> crate::bindings::WalproposerShmemState {
421 9162 : let empty_feedback = crate::bindings::PageserverFeedback {
422 9162 : present: false,
423 9162 : currentClusterSize: 0,
424 9162 : last_received_lsn: 0,
425 9162 : disk_consistent_lsn: 0,
426 9162 : remote_consistent_lsn: 0,
427 9162 : replytime: 0,
428 9162 : shard_number: 0,
429 9162 : corruption_detected: false,
430 9162 : };
431 :
432 9162 : let empty_wal_rate_limiter = crate::bindings::WalRateLimiter {
433 9162 : effective_max_wal_bytes_per_second: crate::bindings::pg_atomic_uint32 { value: 0 },
434 9162 : should_limit: crate::bindings::pg_atomic_uint32 { value: 0 },
435 9162 : sent_bytes: 0,
436 9162 : batch_start_time_us: crate::bindings::pg_atomic_uint64 { value: 0 },
437 9162 : batch_end_time_us: crate::bindings::pg_atomic_uint64 { value: 0 },
438 9162 : };
439 :
440 9162 : crate::bindings::WalproposerShmemState {
441 9162 : propEpochStartLsn: crate::bindings::pg_atomic_uint64 { value: 0 },
442 9162 : donor_name: [0; 64],
443 9162 : donor_conninfo: [0; 1024],
444 9162 : donor_lsn: 0,
445 9162 : mutex: 0,
446 9162 : mineLastElectedTerm: crate::bindings::pg_atomic_uint64 { value: 0 },
447 9162 : backpressureThrottlingTime: crate::bindings::pg_atomic_uint64 { value: 0 },
448 9162 : currentClusterSize: crate::bindings::pg_atomic_uint64 { value: 0 },
449 9162 : shard_ps_feedback: [empty_feedback; 128],
450 9162 : num_shards: 0,
451 9162 : replica_promote: false,
452 9162 : min_ps_feedback: empty_feedback,
453 9162 : wal_rate_limiter: empty_wal_rate_limiter,
454 9162 : }
455 9162 : }
456 :
457 : impl std::fmt::Display for Level {
458 693 : fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
459 693 : write!(f, "{self:?}")
460 693 : }
461 : }
462 :
463 : /// Take ownership of `Vec<u8>` from StringInfoData.
464 : #[allow(clippy::unnecessary_cast)]
465 45468 : pub(crate) fn take_vec_u8(pg: &mut StringInfoData) -> Option<Vec<u8>> {
466 45468 : if pg.data.is_null() {
467 27484 : return None;
468 17984 : }
469 :
470 17984 : let ptr = pg.data as *mut u8;
471 17984 : let length = pg.len as usize;
472 17984 : let capacity = pg.maxlen as usize;
473 :
474 17984 : pg.data = std::ptr::null_mut();
475 17984 : pg.len = 0;
476 17984 : pg.maxlen = 0;
477 :
478 17984 : unsafe { Some(Vec::from_raw_parts(ptr, length, capacity)) }
479 45468 : }
480 :
481 : /// Store `Vec<u8>` in StringInfoData.
482 17990 : fn store_vec_u8(pg: &mut StringInfoData, vec: Vec<u8>) -> *mut ::std::os::raw::c_char {
483 17990 : let ptr = vec.as_ptr() as *mut ::std::os::raw::c_char;
484 17990 : let length = vec.len();
485 17990 : let capacity = vec.capacity();
486 :
487 17990 : assert!(pg.data.is_null());
488 :
489 17990 : pg.data = ptr;
490 17990 : pg.len = length as i32;
491 17990 : pg.maxlen = capacity as i32;
492 :
493 17990 : std::mem::forget(vec);
494 :
495 17990 : ptr
496 17990 : }
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