Line data Source code
1 : //!
2 : //! Import data and WAL from a PostgreSQL data directory and WAL segments into
3 : //! a neon Timeline.
4 : //!
5 : use std::path::{Path, PathBuf};
6 :
7 : use anyhow::{bail, ensure, Context, Result};
8 : use bytes::Bytes;
9 : use camino::Utf8Path;
10 : use futures::StreamExt;
11 : use pageserver_api::key::rel_block_to_key;
12 : use tokio::io::{AsyncRead, AsyncReadExt};
13 : use tokio_tar::Archive;
14 : use tracing::*;
15 : use walkdir::WalkDir;
16 :
17 : use crate::context::RequestContext;
18 : use crate::metrics::WAL_INGEST;
19 : use crate::pgdatadir_mapping::*;
20 : use crate::tenant::Timeline;
21 : use crate::walingest::WalIngest;
22 : use crate::walrecord::DecodedWALRecord;
23 : use pageserver_api::reltag::{RelTag, SlruKind};
24 : use postgres_ffi::pg_constants;
25 : use postgres_ffi::relfile_utils::*;
26 : use postgres_ffi::waldecoder::WalStreamDecoder;
27 : use postgres_ffi::ControlFileData;
28 : use postgres_ffi::DBState_DB_SHUTDOWNED;
29 : use postgres_ffi::Oid;
30 : use postgres_ffi::XLogFileName;
31 : use postgres_ffi::{BLCKSZ, WAL_SEGMENT_SIZE};
32 : use utils::lsn::Lsn;
33 :
34 : // Returns checkpoint LSN from controlfile
35 6 : pub fn get_lsn_from_controlfile(path: &Utf8Path) -> Result<Lsn> {
36 6 : // Read control file to extract the LSN
37 6 : let controlfile_path = path.join("global").join("pg_control");
38 6 : let controlfile_buf = std::fs::read(&controlfile_path)
39 6 : .with_context(|| format!("reading controlfile: {controlfile_path}"))?;
40 6 : let controlfile = ControlFileData::decode(&controlfile_buf)?;
41 6 : let lsn = controlfile.checkPoint;
42 6 :
43 6 : Ok(Lsn(lsn))
44 6 : }
45 :
46 : ///
47 : /// Import all relation data pages from local disk into the repository.
48 : ///
49 : /// This is currently only used to import a cluster freshly created by initdb.
50 : /// The code that deals with the checkpoint would not work right if the
51 : /// cluster was not shut down cleanly.
52 6 : pub async fn import_timeline_from_postgres_datadir(
53 6 : tline: &Timeline,
54 6 : pgdata_path: &Utf8Path,
55 6 : pgdata_lsn: Lsn,
56 6 : ctx: &RequestContext,
57 6 : ) -> Result<()> {
58 6 : let mut pg_control: Option<ControlFileData> = None;
59 6 :
60 6 : // TODO this shoud be start_lsn, which is not necessarily equal to end_lsn (aka lsn)
61 6 : // Then fishing out pg_control would be unnecessary
62 6 : let mut modification = tline.begin_modification(pgdata_lsn);
63 6 : modification.init_empty()?;
64 :
65 : // Import all but pg_wal
66 6 : let all_but_wal = WalkDir::new(pgdata_path)
67 6 : .into_iter()
68 5940 : .filter_entry(|entry| !entry.path().ends_with("pg_wal"));
69 5940 : for entry in all_but_wal {
70 5934 : let entry = entry?;
71 5934 : let metadata = entry.metadata().expect("error getting dir entry metadata");
72 5934 : if metadata.is_file() {
73 5790 : let absolute_path = entry.path();
74 5790 : let relative_path = absolute_path.strip_prefix(pgdata_path)?;
75 :
76 5790 : let mut file = tokio::fs::File::open(absolute_path).await?;
77 5790 : let len = metadata.len() as usize;
78 6 : if let Some(control_file) =
79 22116 : import_file(&mut modification, relative_path, &mut file, len, ctx).await?
80 6 : {
81 6 : pg_control = Some(control_file);
82 5784 : }
83 5790 : modification.flush(ctx).await?;
84 144 : }
85 : }
86 :
87 : // We're done importing all the data files.
88 1044 : modification.commit(ctx).await?;
89 :
90 : // We expect the Postgres server to be shut down cleanly.
91 6 : let pg_control = pg_control.context("pg_control file not found")?;
92 6 : ensure!(
93 6 : pg_control.state == DBState_DB_SHUTDOWNED,
94 0 : "Postgres cluster was not shut down cleanly"
95 : );
96 6 : ensure!(
97 6 : pg_control.checkPointCopy.redo == pgdata_lsn.0,
98 0 : "unexpected checkpoint REDO pointer"
99 : );
100 :
101 : // Import WAL. This is needed even when starting from a shutdown checkpoint, because
102 : // this reads the checkpoint record itself, advancing the tip of the timeline to
103 : // *after* the checkpoint record. And crucially, it initializes the 'prev_lsn'.
104 6 : import_wal(
105 6 : &pgdata_path.join("pg_wal"),
106 6 : tline,
107 6 : Lsn(pg_control.checkPointCopy.redo),
108 6 : pgdata_lsn,
109 6 : ctx,
110 6 : )
111 6 : .await?;
112 :
113 6 : Ok(())
114 6 : }
115 :
116 : // subroutine of import_timeline_from_postgres_datadir(), to load one relation file.
117 5676 : async fn import_rel(
118 5676 : modification: &mut DatadirModification<'_>,
119 5676 : path: &Path,
120 5676 : spcoid: Oid,
121 5676 : dboid: Oid,
122 5676 : reader: &mut (impl AsyncRead + Unpin),
123 5676 : len: usize,
124 5676 : ctx: &RequestContext,
125 5676 : ) -> anyhow::Result<()> {
126 5676 : // Does it look like a relation file?
127 5676 : trace!("importing rel file {}", path.display());
128 :
129 5676 : let filename = &path
130 5676 : .file_name()
131 5676 : .expect("missing rel filename")
132 5676 : .to_string_lossy();
133 5676 : let (relnode, forknum, segno) = parse_relfilename(filename).map_err(|e| {
134 0 : warn!("unrecognized file in postgres datadir: {:?} ({})", path, e);
135 0 : e
136 5676 : })?;
137 :
138 5676 : let mut buf: [u8; 8192] = [0u8; 8192];
139 5676 :
140 5676 : ensure!(len % BLCKSZ as usize == 0);
141 5676 : let nblocks = len / BLCKSZ as usize;
142 5676 :
143 5676 : let rel = RelTag {
144 5676 : spcnode: spcoid,
145 5676 : dbnode: dboid,
146 5676 : relnode,
147 5676 : forknum,
148 5676 : };
149 5676 :
150 5676 : let mut blknum: u32 = segno * (1024 * 1024 * 1024 / BLCKSZ as u32);
151 :
152 : // Call put_rel_creation for every segment of the relation,
153 : // because there is no guarantee about the order in which we are processing segments.
154 : // ignore "relation already exists" error
155 : //
156 : // FIXME: Keep track of which relations we've already created?
157 : // https://github.com/neondatabase/neon/issues/3309
158 5676 : if let Err(e) = modification
159 5676 : .put_rel_creation(rel, nblocks as u32, ctx)
160 0 : .await
161 : {
162 0 : match e {
163 : RelationError::AlreadyExists => {
164 0 : debug!("Relation {} already exist. We must be extending it.", rel)
165 : }
166 0 : _ => return Err(e.into()),
167 : }
168 5676 : }
169 :
170 : loop {
171 21996 : let r = reader.read_exact(&mut buf).await;
172 21996 : match r {
173 : Ok(_) => {
174 16320 : let key = rel_block_to_key(rel, blknum);
175 16320 : if modification.tline.get_shard_identity().is_key_local(&key) {
176 16320 : modification.put_rel_page_image(rel, blknum, Bytes::copy_from_slice(&buf))?;
177 0 : }
178 : }
179 :
180 : // TODO: UnexpectedEof is expected
181 5676 : Err(err) => match err.kind() {
182 : std::io::ErrorKind::UnexpectedEof => {
183 : // reached EOF. That's expected.
184 5676 : let relative_blknum = blknum - segno * (1024 * 1024 * 1024 / BLCKSZ as u32);
185 5676 : ensure!(relative_blknum == nblocks as u32, "unexpected EOF");
186 5676 : break;
187 : }
188 : _ => {
189 0 : bail!("error reading file {}: {:#}", path.display(), err);
190 : }
191 : },
192 : };
193 16320 : blknum += 1;
194 : }
195 :
196 : // Update relation size
197 : //
198 : // If we process rel segments out of order,
199 : // put_rel_extend will skip the update.
200 5676 : modification.put_rel_extend(rel, blknum, ctx).await?;
201 :
202 5676 : Ok(())
203 5676 : }
204 :
205 : /// Import an SLRU segment file
206 : ///
207 18 : async fn import_slru(
208 18 : modification: &mut DatadirModification<'_>,
209 18 : slru: SlruKind,
210 18 : path: &Path,
211 18 : reader: &mut (impl AsyncRead + Unpin),
212 18 : len: usize,
213 18 : ctx: &RequestContext,
214 18 : ) -> anyhow::Result<()> {
215 18 : info!("importing slru file {path:?}");
216 :
217 18 : let mut buf: [u8; 8192] = [0u8; 8192];
218 18 : let filename = &path
219 18 : .file_name()
220 18 : .with_context(|| format!("missing slru filename for path {path:?}"))?
221 18 : .to_string_lossy();
222 18 : let segno = u32::from_str_radix(filename, 16)?;
223 :
224 18 : ensure!(len % BLCKSZ as usize == 0); // we assume SLRU block size is the same as BLCKSZ
225 18 : let nblocks = len / BLCKSZ as usize;
226 18 :
227 18 : ensure!(nblocks <= pg_constants::SLRU_PAGES_PER_SEGMENT as usize);
228 :
229 18 : modification
230 18 : .put_slru_segment_creation(slru, segno, nblocks as u32, ctx)
231 0 : .await?;
232 :
233 18 : let mut rpageno = 0;
234 : loop {
235 36 : let r = reader.read_exact(&mut buf).await;
236 36 : match r {
237 : Ok(_) => {
238 18 : modification.put_slru_page_image(
239 18 : slru,
240 18 : segno,
241 18 : rpageno,
242 18 : Bytes::copy_from_slice(&buf),
243 18 : )?;
244 : }
245 :
246 : // TODO: UnexpectedEof is expected
247 18 : Err(err) => match err.kind() {
248 : std::io::ErrorKind::UnexpectedEof => {
249 : // reached EOF. That's expected.
250 18 : ensure!(rpageno == nblocks as u32, "unexpected EOF");
251 18 : break;
252 : }
253 : _ => {
254 0 : bail!("error reading file {}: {:#}", path.display(), err);
255 : }
256 : },
257 : };
258 18 : rpageno += 1;
259 : }
260 :
261 18 : Ok(())
262 18 : }
263 :
264 : /// Scan PostgreSQL WAL files in given directory and load all records between
265 : /// 'startpoint' and 'endpoint' into the repository.
266 6 : async fn import_wal(
267 6 : walpath: &Utf8Path,
268 6 : tline: &Timeline,
269 6 : startpoint: Lsn,
270 6 : endpoint: Lsn,
271 6 : ctx: &RequestContext,
272 6 : ) -> anyhow::Result<()> {
273 6 : let mut waldecoder = WalStreamDecoder::new(startpoint, tline.pg_version);
274 6 :
275 6 : let mut segno = startpoint.segment_number(WAL_SEGMENT_SIZE);
276 6 : let mut offset = startpoint.segment_offset(WAL_SEGMENT_SIZE);
277 6 : let mut last_lsn = startpoint;
278 :
279 6 : let mut walingest = WalIngest::new(tline, startpoint, ctx).await?;
280 :
281 12 : while last_lsn <= endpoint {
282 : // FIXME: assume postgresql tli 1 for now
283 6 : let filename = XLogFileName(1, segno, WAL_SEGMENT_SIZE);
284 6 : let mut buf = Vec::new();
285 6 :
286 6 : // Read local file
287 6 : let mut path = walpath.join(&filename);
288 6 :
289 6 : // It could be as .partial
290 6 : if !PathBuf::from(&path).exists() {
291 0 : path = walpath.join(filename + ".partial");
292 6 : }
293 :
294 : // Slurp the WAL file
295 6 : let mut file = std::fs::File::open(&path)?;
296 :
297 6 : if offset > 0 {
298 : use std::io::Seek;
299 6 : file.seek(std::io::SeekFrom::Start(offset as u64))?;
300 0 : }
301 :
302 : use std::io::Read;
303 6 : let nread = file.read_to_end(&mut buf)?;
304 6 : if nread != WAL_SEGMENT_SIZE - offset {
305 : // Maybe allow this for .partial files?
306 0 : error!("read only {} bytes from WAL file", nread);
307 6 : }
308 :
309 6 : waldecoder.feed_bytes(&buf);
310 6 :
311 6 : let mut nrecords = 0;
312 6 : let mut modification = tline.begin_modification(last_lsn);
313 6 : let mut decoded = DecodedWALRecord::default();
314 12 : while last_lsn <= endpoint {
315 6 : if let Some((lsn, recdata)) = waldecoder.poll_decode()? {
316 6 : walingest
317 6 : .ingest_record(recdata, lsn, &mut modification, &mut decoded, ctx)
318 3 : .await?;
319 6 : WAL_INGEST.records_committed.inc();
320 6 :
321 6 : modification.commit(ctx).await?;
322 6 : last_lsn = lsn;
323 6 :
324 6 : nrecords += 1;
325 6 :
326 6 : trace!("imported record at {} (end {})", lsn, endpoint);
327 0 : }
328 : }
329 :
330 6 : debug!("imported {} records up to {}", nrecords, last_lsn);
331 :
332 6 : segno += 1;
333 6 : offset = 0;
334 : }
335 :
336 6 : if last_lsn != startpoint {
337 6 : info!("reached end of WAL at {}", last_lsn);
338 : } else {
339 0 : info!("no WAL to import at {}", last_lsn);
340 : }
341 :
342 6 : Ok(())
343 6 : }
344 :
345 0 : pub async fn import_basebackup_from_tar(
346 0 : tline: &Timeline,
347 0 : reader: &mut (impl AsyncRead + Send + Sync + Unpin),
348 0 : base_lsn: Lsn,
349 0 : ctx: &RequestContext,
350 0 : ) -> Result<()> {
351 0 : info!("importing base at {base_lsn}");
352 0 : let mut modification = tline.begin_modification(base_lsn);
353 0 : modification.init_empty()?;
354 :
355 0 : let mut pg_control: Option<ControlFileData> = None;
356 :
357 : // Import base
358 0 : let mut entries = Archive::new(reader).entries()?;
359 0 : while let Some(base_tar_entry) = entries.next().await {
360 0 : let mut entry = base_tar_entry?;
361 0 : let header = entry.header();
362 0 : let len = header.entry_size()? as usize;
363 0 : let file_path = header.path()?.into_owned();
364 0 :
365 0 : match header.entry_type() {
366 : tokio_tar::EntryType::Regular => {
367 0 : if let Some(res) =
368 0 : import_file(&mut modification, file_path.as_ref(), &mut entry, len, ctx).await?
369 0 : {
370 0 : // We found the pg_control file.
371 0 : pg_control = Some(res);
372 0 : }
373 0 : modification.flush(ctx).await?;
374 : }
375 : tokio_tar::EntryType::Directory => {
376 0 : debug!("directory {:?}", file_path);
377 : }
378 : _ => {
379 0 : bail!(
380 0 : "entry {} in backup tar archive is of unexpected type: {:?}",
381 0 : file_path.display(),
382 0 : header.entry_type()
383 0 : );
384 : }
385 : }
386 : }
387 :
388 : // sanity check: ensure that pg_control is loaded
389 0 : let _pg_control = pg_control.context("pg_control file not found")?;
390 :
391 0 : modification.commit(ctx).await?;
392 0 : Ok(())
393 0 : }
394 :
395 0 : pub async fn import_wal_from_tar(
396 0 : tline: &Timeline,
397 0 : reader: &mut (impl AsyncRead + Send + Sync + Unpin),
398 0 : start_lsn: Lsn,
399 0 : end_lsn: Lsn,
400 0 : ctx: &RequestContext,
401 0 : ) -> Result<()> {
402 0 : // Set up walingest mutable state
403 0 : let mut waldecoder = WalStreamDecoder::new(start_lsn, tline.pg_version);
404 0 : let mut segno = start_lsn.segment_number(WAL_SEGMENT_SIZE);
405 0 : let mut offset = start_lsn.segment_offset(WAL_SEGMENT_SIZE);
406 0 : let mut last_lsn = start_lsn;
407 0 : let mut walingest = WalIngest::new(tline, start_lsn, ctx).await?;
408 :
409 : // Ingest wal until end_lsn
410 0 : info!("importing wal until {}", end_lsn);
411 0 : let mut pg_wal_tar = Archive::new(reader);
412 0 : let mut pg_wal_entries = pg_wal_tar.entries()?;
413 0 : while last_lsn <= end_lsn {
414 0 : let bytes = {
415 0 : let mut entry = pg_wal_entries
416 0 : .next()
417 0 : .await
418 0 : .ok_or_else(|| anyhow::anyhow!("expected more wal"))??;
419 0 : let header = entry.header();
420 0 : let file_path = header.path()?.into_owned();
421 0 :
422 0 : match header.entry_type() {
423 : tokio_tar::EntryType::Regular => {
424 : // FIXME: assume postgresql tli 1 for now
425 0 : let expected_filename = XLogFileName(1, segno, WAL_SEGMENT_SIZE);
426 0 : let file_name = file_path
427 0 : .file_name()
428 0 : .expect("missing wal filename")
429 0 : .to_string_lossy();
430 0 : ensure!(expected_filename == file_name);
431 :
432 0 : debug!("processing wal file {:?}", file_path);
433 0 : read_all_bytes(&mut entry).await?
434 : }
435 : tokio_tar::EntryType::Directory => {
436 0 : debug!("directory {:?}", file_path);
437 0 : continue;
438 : }
439 : _ => {
440 0 : bail!(
441 0 : "entry {} in WAL tar archive is of unexpected type: {:?}",
442 0 : file_path.display(),
443 0 : header.entry_type()
444 0 : );
445 : }
446 : }
447 : };
448 :
449 0 : waldecoder.feed_bytes(&bytes[offset..]);
450 0 :
451 0 : let mut modification = tline.begin_modification(last_lsn);
452 0 : let mut decoded = DecodedWALRecord::default();
453 0 : while last_lsn <= end_lsn {
454 0 : if let Some((lsn, recdata)) = waldecoder.poll_decode()? {
455 0 : walingest
456 0 : .ingest_record(recdata, lsn, &mut modification, &mut decoded, ctx)
457 0 : .await?;
458 0 : modification.commit(ctx).await?;
459 0 : last_lsn = lsn;
460 0 :
461 0 : debug!("imported record at {} (end {})", lsn, end_lsn);
462 0 : }
463 : }
464 :
465 0 : debug!("imported records up to {}", last_lsn);
466 0 : segno += 1;
467 0 : offset = 0;
468 : }
469 :
470 0 : if last_lsn != start_lsn {
471 0 : info!("reached end of WAL at {}", last_lsn);
472 : } else {
473 0 : info!("there was no WAL to import at {}", last_lsn);
474 : }
475 :
476 : // Log any extra unused files
477 0 : while let Some(e) = pg_wal_entries.next().await {
478 0 : let entry = e?;
479 0 : let header = entry.header();
480 0 : let file_path = header.path()?.into_owned();
481 0 : info!("skipping {:?}", file_path);
482 : }
483 :
484 0 : Ok(())
485 0 : }
486 :
487 5790 : async fn import_file(
488 5790 : modification: &mut DatadirModification<'_>,
489 5790 : file_path: &Path,
490 5790 : reader: &mut (impl AsyncRead + Send + Sync + Unpin),
491 5790 : len: usize,
492 5790 : ctx: &RequestContext,
493 5790 : ) -> Result<Option<ControlFileData>> {
494 5790 : let file_name = match file_path.file_name() {
495 5790 : Some(name) => name.to_string_lossy(),
496 0 : None => return Ok(None),
497 : };
498 :
499 5790 : if file_name.starts_with('.') {
500 : // tar archives on macOs, created without COPYFILE_DISABLE=1 env var
501 : // will contain "fork files", skip them.
502 0 : return Ok(None);
503 5790 : }
504 5790 :
505 5790 : if file_path.starts_with("global") {
506 360 : let spcnode = postgres_ffi::pg_constants::GLOBALTABLESPACE_OID;
507 360 : let dbnode = 0;
508 360 :
509 360 : match file_name.as_ref() {
510 360 : "pg_control" => {
511 60 : let bytes = read_all_bytes(reader).await?;
512 :
513 : // Extract the checkpoint record and import it separately.
514 6 : let pg_control = ControlFileData::decode(&bytes[..])?;
515 6 : let checkpoint_bytes = pg_control.checkPointCopy.encode()?;
516 6 : modification.put_checkpoint(checkpoint_bytes)?;
517 6 : debug!("imported control file");
518 :
519 : // Import it as ControlFile
520 6 : modification.put_control_file(bytes)?;
521 6 : return Ok(Some(pg_control));
522 : }
523 354 : "pg_filenode.map" => {
524 36 : let bytes = read_all_bytes(reader).await?;
525 6 : modification
526 6 : .put_relmap_file(spcnode, dbnode, bytes, ctx)
527 0 : .await?;
528 6 : debug!("imported relmap file")
529 : }
530 348 : "PG_VERSION" => {
531 0 : debug!("ignored PG_VERSION file");
532 : }
533 : _ => {
534 705 : import_rel(modification, file_path, spcnode, dbnode, reader, len, ctx).await?;
535 348 : debug!("imported rel creation");
536 : }
537 : }
538 5430 : } else if file_path.starts_with("base") {
539 5364 : let spcnode = pg_constants::DEFAULTTABLESPACE_OID;
540 5364 : let dbnode: u32 = file_path
541 5364 : .iter()
542 5364 : .nth(1)
543 5364 : .expect("invalid file path, expected dbnode")
544 5364 : .to_string_lossy()
545 5364 : .parse()?;
546 :
547 5364 : match file_name.as_ref() {
548 5364 : "pg_filenode.map" => {
549 106 : let bytes = read_all_bytes(reader).await?;
550 18 : modification
551 18 : .put_relmap_file(spcnode, dbnode, bytes, ctx)
552 0 : .await?;
553 18 : debug!("imported relmap file")
554 : }
555 5346 : "PG_VERSION" => {
556 18 : debug!("ignored PG_VERSION file");
557 : }
558 : _ => {
559 21173 : import_rel(modification, file_path, spcnode, dbnode, reader, len, ctx).await?;
560 5328 : debug!("imported rel creation");
561 : }
562 : }
563 66 : } else if file_path.starts_with("pg_xact") {
564 6 : let slru = SlruKind::Clog;
565 6 :
566 12 : import_slru(modification, slru, file_path, reader, len, ctx).await?;
567 6 : debug!("imported clog slru");
568 60 : } else if file_path.starts_with("pg_multixact/offsets") {
569 6 : let slru = SlruKind::MultiXactOffsets;
570 6 :
571 12 : import_slru(modification, slru, file_path, reader, len, ctx).await?;
572 6 : debug!("imported multixact offsets slru");
573 54 : } else if file_path.starts_with("pg_multixact/members") {
574 6 : let slru = SlruKind::MultiXactMembers;
575 6 :
576 12 : import_slru(modification, slru, file_path, reader, len, ctx).await?;
577 6 : debug!("imported multixact members slru");
578 48 : } else if file_path.starts_with("pg_twophase") {
579 0 : let xid = u32::from_str_radix(file_name.as_ref(), 16)?;
580 :
581 0 : let bytes = read_all_bytes(reader).await?;
582 0 : modification
583 0 : .put_twophase_file(xid, Bytes::copy_from_slice(&bytes[..]), ctx)
584 0 : .await?;
585 0 : debug!("imported twophase file");
586 48 : } else if file_path.starts_with("pg_wal") {
587 0 : debug!("found wal file in base section. ignore it");
588 48 : } else if file_path.starts_with("zenith.signal") {
589 : // Parse zenith signal file to set correct previous LSN
590 0 : let bytes = read_all_bytes(reader).await?;
591 : // zenith.signal format is "PREV LSN: prev_lsn"
592 : // TODO write serialization and deserialization in the same place.
593 0 : let zenith_signal = std::str::from_utf8(&bytes)?.trim();
594 0 : let prev_lsn = match zenith_signal {
595 0 : "PREV LSN: none" => Lsn(0),
596 0 : "PREV LSN: invalid" => Lsn(0),
597 0 : other => {
598 0 : let split = other.split(':').collect::<Vec<_>>();
599 0 : split[1]
600 0 : .trim()
601 0 : .parse::<Lsn>()
602 0 : .context("can't parse zenith.signal")?
603 : }
604 : };
605 :
606 : // zenith.signal is not necessarily the last file, that we handle
607 : // but it is ok to call `finish_write()`, because final `modification.commit()`
608 : // will update lsn once more to the final one.
609 0 : let writer = modification.tline.writer().await;
610 0 : writer.finish_write(prev_lsn);
611 0 :
612 0 : debug!("imported zenith signal {}", prev_lsn);
613 48 : } else if file_path.starts_with("pg_tblspc") {
614 : // TODO Backups exported from neon won't have pg_tblspc, but we will need
615 : // this to import arbitrary postgres databases.
616 0 : bail!("Importing pg_tblspc is not implemented");
617 : } else {
618 48 : debug!(
619 0 : "ignoring unrecognized file \"{}\" in tar archive",
620 0 : file_path.display()
621 : );
622 : }
623 :
624 5784 : Ok(None)
625 5790 : }
626 :
627 30 : async fn read_all_bytes(reader: &mut (impl AsyncRead + Unpin)) -> Result<Bytes> {
628 30 : let mut buf: Vec<u8> = vec![];
629 202 : reader.read_to_end(&mut buf).await?;
630 30 : Ok(Bytes::from(buf))
631 30 : }
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