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pg_backup_archiver.c
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1 /*-------------------------------------------------------------------------
2  *
3  * pg_backup_archiver.c
4  *
5  * Private implementation of the archiver routines.
6  *
7  * See the headers to pg_restore for more details.
8  *
9  * Copyright (c) 2000, Philip Warner
10  * Rights are granted to use this software in any way so long
11  * as this notice is not removed.
12  *
13  * The author is not responsible for loss or damages that may
14  * result from its use.
15  *
16  *
17  * IDENTIFICATION
18  * src/bin/pg_dump/pg_backup_archiver.c
19  *
20  *-------------------------------------------------------------------------
21  */
22 #include "postgres_fe.h"
23 
24 #include <ctype.h>
25 #include <fcntl.h>
26 #include <unistd.h>
27 #include <sys/stat.h>
28 #include <sys/wait.h>
29 #ifdef WIN32
30 #include <io.h>
31 #endif
32 
33 #include "common/string.h"
34 #include "dumputils.h"
35 #include "fe_utils/string_utils.h"
36 #include "lib/stringinfo.h"
37 #include "libpq/libpq-fs.h"
38 #include "parallel.h"
39 #include "pg_backup_archiver.h"
40 #include "pg_backup_db.h"
41 #include "pg_backup_utils.h"
42 
43 #define TEXT_DUMP_HEADER "--\n-- PostgreSQL database dump\n--\n\n"
44 #define TEXT_DUMPALL_HEADER "--\n-- PostgreSQL database cluster dump\n--\n\n"
45 
46 /* state needed to save/restore an archive's output target */
47 typedef struct _outputContext
48 {
49  void *OF;
50  int gzOut;
51 } OutputContext;
52 
53 /*
54  * State for tracking TocEntrys that are ready to process during a parallel
55  * restore. (This used to be a list, and we still call it that, though now
56  * it's really an array so that we can apply qsort to it.)
57  *
58  * tes[] is sized large enough that we can't overrun it.
59  * The valid entries are indexed first_te .. last_te inclusive.
60  * We periodically sort the array to bring larger-by-dataLength entries to
61  * the front; "sorted" is true if the valid entries are known sorted.
62  */
63 typedef struct _parallelReadyList
64 {
65  TocEntry **tes; /* Ready-to-dump TocEntrys */
66  int first_te; /* index of first valid entry in tes[] */
67  int last_te; /* index of last valid entry in tes[] */
68  bool sorted; /* are valid entries currently sorted? */
69 } ParallelReadyList;
70 
71 
72 static ArchiveHandle *_allocAH(const char *FileSpec, const ArchiveFormat fmt,
73  const int compression, bool dosync, ArchiveMode mode,
74  SetupWorkerPtrType setupWorkerPtr);
75 static void _getObjectDescription(PQExpBuffer buf, TocEntry *te);
76 static void _printTocEntry(ArchiveHandle *AH, TocEntry *te, bool isData);
77 static char *sanitize_line(const char *str, bool want_hyphen);
78 static void _doSetFixedOutputState(ArchiveHandle *AH);
79 static void _doSetSessionAuth(ArchiveHandle *AH, const char *user);
80 static void _reconnectToDB(ArchiveHandle *AH, const char *dbname);
81 static void _becomeUser(ArchiveHandle *AH, const char *user);
82 static void _becomeOwner(ArchiveHandle *AH, TocEntry *te);
83 static void _selectOutputSchema(ArchiveHandle *AH, const char *schemaName);
84 static void _selectTablespace(ArchiveHandle *AH, const char *tablespace);
85 static void _selectTableAccessMethod(ArchiveHandle *AH, const char *tableam);
86 static void processEncodingEntry(ArchiveHandle *AH, TocEntry *te);
87 static void processStdStringsEntry(ArchiveHandle *AH, TocEntry *te);
88 static void processSearchPathEntry(ArchiveHandle *AH, TocEntry *te);
89 static int _tocEntryRequired(TocEntry *te, teSection curSection, ArchiveHandle *AH);
90 static RestorePass _tocEntryRestorePass(TocEntry *te);
91 static bool _tocEntryIsACL(TocEntry *te);
92 static void _disableTriggersIfNecessary(ArchiveHandle *AH, TocEntry *te);
93 static void _enableTriggersIfNecessary(ArchiveHandle *AH, TocEntry *te);
94 static void buildTocEntryArrays(ArchiveHandle *AH);
95 static void _moveBefore(TocEntry *pos, TocEntry *te);
96 static int _discoverArchiveFormat(ArchiveHandle *AH);
97 
98 static int RestoringToDB(ArchiveHandle *AH);
99 static void dump_lo_buf(ArchiveHandle *AH);
100 static void dumpTimestamp(ArchiveHandle *AH, const char *msg, time_t tim);
101 static void SetOutput(ArchiveHandle *AH, const char *filename, int compression);
102 static OutputContext SaveOutput(ArchiveHandle *AH);
103 static void RestoreOutput(ArchiveHandle *AH, OutputContext savedContext);
104 
105 static int restore_toc_entry(ArchiveHandle *AH, TocEntry *te, bool is_parallel);
106 static void restore_toc_entries_prefork(ArchiveHandle *AH,
107  TocEntry *pending_list);
108 static void restore_toc_entries_parallel(ArchiveHandle *AH,
109  ParallelState *pstate,
110  TocEntry *pending_list);
111 static void restore_toc_entries_postfork(ArchiveHandle *AH,
112  TocEntry *pending_list);
113 static void pending_list_header_init(TocEntry *l);
114 static void pending_list_append(TocEntry *l, TocEntry *te);
115 static void pending_list_remove(TocEntry *te);
116 static void ready_list_init(ParallelReadyList *ready_list, int tocCount);
117 static void ready_list_free(ParallelReadyList *ready_list);
118 static void ready_list_insert(ParallelReadyList *ready_list, TocEntry *te);
119 static void ready_list_remove(ParallelReadyList *ready_list, int i);
120 static void ready_list_sort(ParallelReadyList *ready_list);
121 static int TocEntrySizeCompare(const void *p1, const void *p2);
122 static void move_to_ready_list(TocEntry *pending_list,
123  ParallelReadyList *ready_list,
124  RestorePass pass);
125 static TocEntry *pop_next_work_item(ParallelReadyList *ready_list,
126  ParallelState *pstate);
127 static void mark_dump_job_done(ArchiveHandle *AH,
128  TocEntry *te,
129  int status,
130  void *callback_data);
131 static void mark_restore_job_done(ArchiveHandle *AH,
132  TocEntry *te,
133  int status,
134  void *callback_data);
135 static void fix_dependencies(ArchiveHandle *AH);
136 static bool has_lock_conflicts(TocEntry *te1, TocEntry *te2);
137 static void repoint_table_dependencies(ArchiveHandle *AH);
138 static void identify_locking_dependencies(ArchiveHandle *AH, TocEntry *te);
139 static void reduce_dependencies(ArchiveHandle *AH, TocEntry *te,
140  ParallelReadyList *ready_list);
141 static void mark_create_done(ArchiveHandle *AH, TocEntry *te);
142 static void inhibit_data_for_failed_table(ArchiveHandle *AH, TocEntry *te);
143 
144 static void StrictNamesCheck(RestoreOptions *ropt);
145 
146 
147 /*
148  * Allocate a new DumpOptions block containing all default values.
149  */
150 DumpOptions *
151 NewDumpOptions(void)
152 {
153  DumpOptions *opts = (DumpOptions *) pg_malloc(sizeof(DumpOptions));
154 
155  InitDumpOptions(opts);
156  return opts;
157 }
158 
159 /*
160  * Initialize a DumpOptions struct to all default values
161  */
162 void
163 InitDumpOptions(DumpOptions *opts)
164 {
165  memset(opts, 0, sizeof(DumpOptions));
166  /* set any fields that shouldn't default to zeroes */
167  opts->include_everything = true;
168  opts->cparams.promptPassword = TRI_DEFAULT;
169  opts->dumpSections = DUMP_UNSECTIONED;
170 }
171 
172 /*
173  * Create a freshly allocated DumpOptions with options equivalent to those
174  * found in the given RestoreOptions.
175  */
176 DumpOptions *
177 dumpOptionsFromRestoreOptions(RestoreOptions *ropt)
178 {
179  DumpOptions *dopt = NewDumpOptions();
180 
181  /* this is the inverse of what's at the end of pg_dump.c's main() */
182  dopt->cparams.dbname = ropt->cparams.dbname ? pg_strdup(ropt->cparams.dbname) : NULL;
183  dopt->cparams.pgport = ropt->cparams.pgport ? pg_strdup(ropt->cparams.pgport) : NULL;
184  dopt->cparams.pghost = ropt->cparams.pghost ? pg_strdup(ropt->cparams.pghost) : NULL;
185  dopt->cparams.username = ropt->cparams.username ? pg_strdup(ropt->cparams.username) : NULL;
186  dopt->cparams.promptPassword = ropt->cparams.promptPassword;
187  dopt->outputClean = ropt->dropSchema;
188  dopt->dataOnly = ropt->dataOnly;
189  dopt->schemaOnly = ropt->schemaOnly;
190  dopt->if_exists = ropt->if_exists;
191  dopt->column_inserts = ropt->column_inserts;
192  dopt->dumpSections = ropt->dumpSections;
193  dopt->aclsSkip = ropt->aclsSkip;
194  dopt->outputSuperuser = ropt->superuser;
195  dopt->outputCreateDB = ropt->createDB;
196  dopt->outputNoOwner = ropt->noOwner;
197  dopt->outputNoTablespaces = ropt->noTablespace;
198  dopt->disable_triggers = ropt->disable_triggers;
199  dopt->use_setsessauth = ropt->use_setsessauth;
200  dopt->disable_dollar_quoting = ropt->disable_dollar_quoting;
201  dopt->dump_inserts = ropt->dump_inserts;
202  dopt->no_comments = ropt->no_comments;
203  dopt->no_publications = ropt->no_publications;
204  dopt->no_security_labels = ropt->no_security_labels;
205  dopt->no_subscriptions = ropt->no_subscriptions;
206  dopt->lockWaitTimeout = ropt->lockWaitTimeout;
207  dopt->include_everything = ropt->include_everything;
208  dopt->enable_row_security = ropt->enable_row_security;
209  dopt->sequence_data = ropt->sequence_data;
210 
211  return dopt;
212 }
213 
214 
215 /*
216  * Wrapper functions.
217  *
218  * The objective is to make writing new formats and dumpers as simple
219  * as possible, if necessary at the expense of extra function calls etc.
220  *
221  */
222 
223 /*
224  * The dump worker setup needs lots of knowledge of the internals of pg_dump,
225  * so it's defined in pg_dump.c and passed into OpenArchive. The restore worker
226  * setup doesn't need to know anything much, so it's defined here.
227  */
228 static void
229 setupRestoreWorker(Archive *AHX)
230 {
231  ArchiveHandle *AH = (ArchiveHandle *) AHX;
232 
233  AH->ReopenPtr(AH);
234 }
235 
236 
237 /* Create a new archive */
238 /* Public */
239 Archive *
240 CreateArchive(const char *FileSpec, const ArchiveFormat fmt,
241  const int compression, bool dosync, ArchiveMode mode,
242  SetupWorkerPtrType setupDumpWorker)
243 
244 {
245  ArchiveHandle *AH = _allocAH(FileSpec, fmt, compression, dosync,
246  mode, setupDumpWorker);
247 
248  return (Archive *) AH;
249 }
250 
251 /* Open an existing archive */
252 /* Public */
253 Archive *
254 OpenArchive(const char *FileSpec, const ArchiveFormat fmt)
255 {
256  ArchiveHandle *AH = _allocAH(FileSpec, fmt, 0, true, archModeRead, setupRestoreWorker);
257 
258  return (Archive *) AH;
259 }
260 
261 /* Public */
262 void
263 CloseArchive(Archive *AHX)
264 {
265  int res = 0;
266  ArchiveHandle *AH = (ArchiveHandle *) AHX;
267 
268  AH->ClosePtr(AH);
269 
270  /* Close the output */
271  if (AH->gzOut)
272  res = GZCLOSE(AH->OF);
273  else if (AH->OF != stdout)
274  res = fclose(AH->OF);
275 
276  if (res != 0)
277  fatal("could not close output file: %m");
278 }
279 
280 /* Public */
281 void
282 SetArchiveOptions(Archive *AH, DumpOptions *dopt, RestoreOptions *ropt)
283 {
284  /* Caller can omit dump options, in which case we synthesize them */
285  if (dopt == NULL && ropt != NULL)
286  dopt = dumpOptionsFromRestoreOptions(ropt);
287 
288  /* Save options for later access */
289  AH->dopt = dopt;
290  AH->ropt = ropt;
291 }
292 
293 /* Public */
294 void
295 ProcessArchiveRestoreOptions(Archive *AHX)
296 {
297  ArchiveHandle *AH = (ArchiveHandle *) AHX;
298  RestoreOptions *ropt = AH->public.ropt;
299  TocEntry *te;
300  teSection curSection;
301 
302  /* Decide which TOC entries will be dumped/restored, and mark them */
303  curSection = SECTION_PRE_DATA;
304  for (te = AH->toc->next; te != AH->toc; te = te->next)
305  {
306  /*
307  * When writing an archive, we also take this opportunity to check
308  * that we have generated the entries in a sane order that respects
309  * the section divisions. When reading, don't complain, since buggy
310  * old versions of pg_dump might generate out-of-order archives.
311  */
312  if (AH->mode != archModeRead)
313  {
314  switch (te->section)
315  {
316  case SECTION_NONE:
317  /* ok to be anywhere */
318  break;
319  case SECTION_PRE_DATA:
320  if (curSection != SECTION_PRE_DATA)
321  pg_log_warning("archive items not in correct section order");
322  break;
323  case SECTION_DATA:
324  if (curSection == SECTION_POST_DATA)
325  pg_log_warning("archive items not in correct section order");
326  break;
327  case SECTION_POST_DATA:
328  /* ok no matter which section we were in */
329  break;
330  default:
331  fatal("unexpected section code %d",
332  (int) te->section);
333  break;
334  }
335  }
336 
337  if (te->section != SECTION_NONE)
338  curSection = te->section;
339 
340  te->reqs = _tocEntryRequired(te, curSection, AH);
341  }
342 
343  /* Enforce strict names checking */
344  if (ropt->strict_names)
345  StrictNamesCheck(ropt);
346 }
347 
348 /* Public */
349 void
350 RestoreArchive(Archive *AHX)
351 {
352  ArchiveHandle *AH = (ArchiveHandle *) AHX;
353  RestoreOptions *ropt = AH->public.ropt;
354  bool parallel_mode;
355  TocEntry *te;
356  OutputContext sav;
357 
358  AH->stage = STAGE_INITIALIZING;
359 
360  /*
361  * If we're going to do parallel restore, there are some restrictions.
362  */
363  parallel_mode = (AH->public.numWorkers > 1 && ropt->useDB);
364  if (parallel_mode)
365  {
366  /* We haven't got round to making this work for all archive formats */
367  if (AH->ClonePtr == NULL || AH->ReopenPtr == NULL)
368  fatal("parallel restore is not supported with this archive file format");
369 
370  /* Doesn't work if the archive represents dependencies as OIDs */
371  if (AH->version < K_VERS_1_8)
372  fatal("parallel restore is not supported with archives made by pre-8.0 pg_dump");
373 
374  /*
375  * It's also not gonna work if we can't reopen the input file, so
376  * let's try that immediately.
377  */
378  AH->ReopenPtr(AH);
379  }
380 
381  /*
382  * Make sure we won't need (de)compression we haven't got
383  */
384 #ifndef HAVE_LIBZ
385  if (AH->compression != 0 && AH->PrintTocDataPtr != NULL)
386  {
387  for (te = AH->toc->next; te != AH->toc; te = te->next)
388  {
389  if (te->hadDumper && (te->reqs & REQ_DATA) != 0)
390  fatal("cannot restore from compressed archive (compression not supported in this installation)");
391  }
392  }
393 #endif
394 
395  /*
396  * Prepare index arrays, so we can assume we have them throughout restore.
397  * It's possible we already did this, though.
398  */
399  if (AH->tocsByDumpId == NULL)
400  buildTocEntryArrays(AH);
401 
402  /*
403  * If we're using a DB connection, then connect it.
404  */
405  if (ropt->useDB)
406  {
407  pg_log_info("connecting to database for restore");
408  if (AH->version < K_VERS_1_3)
409  fatal("direct database connections are not supported in pre-1.3 archives");
410 
411  /*
412  * We don't want to guess at whether the dump will successfully
413  * restore; allow the attempt regardless of the version of the restore
414  * target.
415  */
416  AHX->minRemoteVersion = 0;
417  AHX->maxRemoteVersion = 9999999;
418 
419  ConnectDatabase(AHX, &ropt->cparams, false);
420 
421  /*
422  * If we're talking to the DB directly, don't send comments since they
423  * obscure SQL when displaying errors
424  */
425  AH->noTocComments = 1;
426  }
427 
428  /*
429  * Work out if we have an implied data-only restore. This can happen if
430  * the dump was data only or if the user has used a toc list to exclude
431  * all of the schema data. All we do is look for schema entries - if none
432  * are found then we set the dataOnly flag.
433  *
434  * We could scan for wanted TABLE entries, but that is not the same as
435  * dataOnly. At this stage, it seems unnecessary (6-Mar-2001).
436  */
437  if (!ropt->dataOnly)
438  {
439  int impliedDataOnly = 1;
440 
441  for (te = AH->toc->next; te != AH->toc; te = te->next)
442  {
443  if ((te->reqs & REQ_SCHEMA) != 0)
444  { /* It's schema, and it's wanted */
445  impliedDataOnly = 0;
446  break;
447  }
448  }
449  if (impliedDataOnly)
450  {
451  ropt->dataOnly = impliedDataOnly;
452  pg_log_info("implied data-only restore");
453  }
454  }
455 
456  /*
457  * Setup the output file if necessary.
458  */
459  sav = SaveOutput(AH);
460  if (ropt->filename || ropt->compression)
461  SetOutput(AH, ropt->filename, ropt->compression);
462 
463  ahprintf(AH, "--\n-- PostgreSQL database dump\n--\n\n");
464 
465  if (AH->archiveRemoteVersion)
466  ahprintf(AH, "-- Dumped from database version %s\n",
467  AH->archiveRemoteVersion);
468  if (AH->archiveDumpVersion)
469  ahprintf(AH, "-- Dumped by pg_dump version %s\n",
470  AH->archiveDumpVersion);
471 
472  ahprintf(AH, "\n");
473 
474  if (AH->public.verbose)
475  dumpTimestamp(AH, "Started on", AH->createDate);
476 
477  if (ropt->single_txn)
478  {
479  if (AH->connection)
480  StartTransaction(AHX);
481  else
482  ahprintf(AH, "BEGIN;\n\n");
483  }
484 
485  /*
486  * Establish important parameter values right away.
487  */
488  _doSetFixedOutputState(AH);
489 
490  AH->stage = STAGE_PROCESSING;
491 
492  /*
493  * Drop the items at the start, in reverse order
494  */
495  if (ropt->dropSchema)
496  {
497  for (te = AH->toc->prev; te != AH->toc; te = te->prev)
498  {
499  AH->currentTE = te;
500 
501  /*
502  * In createDB mode, issue a DROP *only* for the database as a
503  * whole. Issuing drops against anything else would be wrong,
504  * because at this point we're connected to the wrong database.
505  * (The DATABASE PROPERTIES entry, if any, should be treated like
506  * the DATABASE entry.)
507  */
508  if (ropt->createDB)
509  {
510  if (strcmp(te->desc, "DATABASE") != 0 &&
511  strcmp(te->desc, "DATABASE PROPERTIES") != 0)
512  continue;
513  }
514 
515  /* Otherwise, drop anything that's selected and has a dropStmt */
516  if (((te->reqs & (REQ_SCHEMA | REQ_DATA)) != 0) && te->dropStmt)
517  {
518  pg_log_info("dropping %s %s", te->desc, te->tag);
519  /* Select owner and schema as necessary */
520  _becomeOwner(AH, te);
521  _selectOutputSchema(AH, te->namespace);
522 
523  /*
524  * Now emit the DROP command, if the object has one. Note we
525  * don't necessarily emit it verbatim; at this point we add an
526  * appropriate IF EXISTS clause, if the user requested it.
527  */
528  if (*te->dropStmt != '\0')
529  {
530  if (!ropt->if_exists)
531  {
532  /* No --if-exists? Then just use the original */
533  ahprintf(AH, "%s", te->dropStmt);
534  }
535  else
536  {
537  /*
538  * Inject an appropriate spelling of "if exists". For
539  * large objects, we have a separate routine that
540  * knows how to do it, without depending on
541  * te->dropStmt; use that. For other objects we need
542  * to parse the command.
543  */
544  if (strncmp(te->desc, "BLOB", 4) == 0)
545  {
546  DropBlobIfExists(AH, te->catalogId.oid);
547  }
548  else
549  {
550  char *dropStmt = pg_strdup(te->dropStmt);
551  char *dropStmtOrig = dropStmt;
552  PQExpBuffer ftStmt = createPQExpBuffer();
553 
554  /*
555  * Need to inject IF EXISTS clause after ALTER
556  * TABLE part in ALTER TABLE .. DROP statement
557  */
558  if (strncmp(dropStmt, "ALTER TABLE", 11) == 0)
559  {
560  appendPQExpBufferStr(ftStmt,
561  "ALTER TABLE IF EXISTS");
562  dropStmt = dropStmt + 11;
563  }
564 
565  /*
566  * ALTER TABLE..ALTER COLUMN..DROP DEFAULT does
567  * not support the IF EXISTS clause, and therefore
568  * we simply emit the original command for DEFAULT
569  * objects (modulo the adjustment made above).
570  *
571  * Likewise, don't mess with DATABASE PROPERTIES.
572  *
573  * If we used CREATE OR REPLACE VIEW as a means of
574  * quasi-dropping an ON SELECT rule, that should
575  * be emitted unchanged as well.
576  *
577  * For other object types, we need to extract the
578  * first part of the DROP which includes the
579  * object type. Most of the time this matches
580  * te->desc, so search for that; however for the
581  * different kinds of CONSTRAINTs, we know to
582  * search for hardcoded "DROP CONSTRAINT" instead.
583  */
584  if (strcmp(te->desc, "DEFAULT") == 0 ||
585  strcmp(te->desc, "DATABASE PROPERTIES") == 0 ||
586  strncmp(dropStmt, "CREATE OR REPLACE VIEW", 22) == 0)
587  appendPQExpBufferStr(ftStmt, dropStmt);
588  else
589  {
590  char buffer[40];
591  char *mark;
592 
593  if (strcmp(te->desc, "CONSTRAINT") == 0 ||
594  strcmp(te->desc, "CHECK CONSTRAINT") == 0 ||
595  strcmp(te->desc, "FK CONSTRAINT") == 0)
596  strcpy(buffer, "DROP CONSTRAINT");
597  else
598  snprintf(buffer, sizeof(buffer), "DROP %s",
599  te->desc);
600 
601  mark = strstr(dropStmt, buffer);
602 
603  if (mark)
604  {
605  *mark = '\0';
606  appendPQExpBuffer(ftStmt, "%s%s IF EXISTS%s",
607  dropStmt, buffer,
608  mark + strlen(buffer));
609  }
610  else
611  {
612  /* complain and emit unmodified command */
613  pg_log_warning("could not find where to insert IF EXISTS in statement \"%s\"",
614  dropStmtOrig);
615  appendPQExpBufferStr(ftStmt, dropStmt);
616  }
617  }
618 
619  ahprintf(AH, "%s", ftStmt->data);
620 
621  destroyPQExpBuffer(ftStmt);
622  pg_free(dropStmtOrig);
623  }
624  }
625  }
626  }
627  }
628 
629  /*
630  * _selectOutputSchema may have set currSchema to reflect the effect
631  * of a "SET search_path" command it emitted. However, by now we may
632  * have dropped that schema; or it might not have existed in the first
633  * place. In either case the effective value of search_path will not
634  * be what we think. Forcibly reset currSchema so that we will
635  * re-establish the search_path setting when needed (after creating
636  * the schema).
637  *
638  * If we treated users as pg_dump'able objects then we'd need to reset
639  * currUser here too.
640  */
641  if (AH->currSchema)
642  free(AH->currSchema);
643  AH->currSchema = NULL;
644  }
645 
646  if (parallel_mode)
647  {
648  /*
649  * In parallel mode, turn control over to the parallel-restore logic.
650  */
651  ParallelState *pstate;
652  TocEntry pending_list;
653 
654  /* The archive format module may need some setup for this */
655  if (AH->PrepParallelRestorePtr)
656  AH->PrepParallelRestorePtr(AH);
657 
658  pending_list_header_init(&pending_list);
659 
660  /* This runs PRE_DATA items and then disconnects from the database */
661  restore_toc_entries_prefork(AH, &pending_list);
662  Assert(AH->connection == NULL);
663 
664  /* ParallelBackupStart() will actually fork the processes */
665  pstate = ParallelBackupStart(AH);
666  restore_toc_entries_parallel(AH, pstate, &pending_list);
667  ParallelBackupEnd(AH, pstate);
668 
669  /* reconnect the leader and see if we missed something */
670  restore_toc_entries_postfork(AH, &pending_list);
671  Assert(AH->connection != NULL);
672  }
673  else
674  {
675  /*
676  * In serial mode, process everything in three phases: normal items,
677  * then ACLs, then post-ACL items. We might be able to skip one or
678  * both extra phases in some cases, eg data-only restores.
679  */
680  bool haveACL = false;
681  bool havePostACL = false;
682 
683  for (te = AH->toc->next; te != AH->toc; te = te->next)
684  {
685  if ((te->reqs & (REQ_SCHEMA | REQ_DATA)) == 0)
686  continue; /* ignore if not to be dumped at all */
687 
688  switch (_tocEntryRestorePass(te))
689  {
690  case RESTORE_PASS_MAIN:
691  (void) restore_toc_entry(AH, te, false);
692  break;
693  case RESTORE_PASS_ACL:
694  haveACL = true;
695  break;
696  case RESTORE_PASS_POST_ACL:
697  havePostACL = true;
698  break;
699  }
700  }
701 
702  if (haveACL)
703  {
704  for (te = AH->toc->next; te != AH->toc; te = te->next)
705  {
706  if ((te->reqs & (REQ_SCHEMA | REQ_DATA)) != 0 &&
707  _tocEntryRestorePass(te) == RESTORE_PASS_ACL)
708  (void) restore_toc_entry(AH, te, false);
709  }
710  }
711 
712  if (havePostACL)
713  {
714  for (te = AH->toc->next; te != AH->toc; te = te->next)
715  {
716  if ((te->reqs & (REQ_SCHEMA | REQ_DATA)) != 0 &&
717  _tocEntryRestorePass(te) == RESTORE_PASS_POST_ACL)
718  (void) restore_toc_entry(AH, te, false);
719  }
720  }
721  }
722 
723  if (ropt->single_txn)
724  {
725  if (AH->connection)
726  CommitTransaction(AHX);
727  else
728  ahprintf(AH, "COMMIT;\n\n");
729  }
730 
731  if (AH->public.verbose)
732  dumpTimestamp(AH, "Completed on", time(NULL));
733 
734  ahprintf(AH, "--\n-- PostgreSQL database dump complete\n--\n\n");
735 
736  /*
737  * Clean up & we're done.
738  */
739  AH->stage = STAGE_FINALIZING;
740 
741  if (ropt->filename || ropt->compression)
742  RestoreOutput(AH, sav);
743 
744  if (ropt->useDB)
745  DisconnectDatabase(&AH->public);
746 }
747 
748 /*
749  * Restore a single TOC item. Used in both parallel and non-parallel restore;
750  * is_parallel is true if we are in a worker child process.
751  *
752  * Returns 0 normally, but WORKER_CREATE_DONE or WORKER_INHIBIT_DATA if
753  * the parallel parent has to make the corresponding status update.
754  */
755 static int
756 restore_toc_entry(ArchiveHandle *AH, TocEntry *te, bool is_parallel)
757 {
758  RestoreOptions *ropt = AH->public.ropt;
759  int status = WORKER_OK;
760  int reqs;
761  bool defnDumped;
762 
763  AH->currentTE = te;
764 
765  /* Dump any relevant dump warnings to stderr */
766  if (!ropt->suppressDumpWarnings && strcmp(te->desc, "WARNING") == 0)
767  {
768  if (!ropt->dataOnly && te->defn != NULL && strlen(te->defn) != 0)
769  pg_log_warning("warning from original dump file: %s", te->defn);
770  else if (te->copyStmt != NULL && strlen(te->copyStmt) != 0)
771  pg_log_warning("warning from original dump file: %s", te->copyStmt);
772  }
773 
774  /* Work out what, if anything, we want from this entry */
775  reqs = te->reqs;
776 
777  defnDumped = false;
778 
779  /*
780  * If it has a schema component that we want, then process that
781  */
782  if ((reqs & REQ_SCHEMA) != 0)
783  {
784  /* Show namespace in log message if available */
785  if (te->namespace)
786  pg_log_info("creating %s \"%s.%s\"",
787  te->desc, te->namespace, te->tag);
788  else
789  pg_log_info("creating %s \"%s\"",
790  te->desc, te->tag);
791 
792  _printTocEntry(AH, te, false);
793  defnDumped = true;
794 
795  if (strcmp(te->desc, "TABLE") == 0)
796  {
797  if (AH->lastErrorTE == te)
798  {
799  /*
800  * We failed to create the table. If
801  * --no-data-for-failed-tables was given, mark the
802  * corresponding TABLE DATA to be ignored.
803  *
804  * In the parallel case this must be done in the parent, so we
805  * just set the return value.
806  */
807  if (ropt->noDataForFailedTables)
808  {
809  if (is_parallel)
810  status = WORKER_INHIBIT_DATA;
811  else
812  inhibit_data_for_failed_table(AH, te);
813  }
814  }
815  else
816  {
817  /*
818  * We created the table successfully. Mark the corresponding
819  * TABLE DATA for possible truncation.
820  *
821  * In the parallel case this must be done in the parent, so we
822  * just set the return value.
823  */
824  if (is_parallel)
825  status = WORKER_CREATE_DONE;
826  else
827  mark_create_done(AH, te);
828  }
829  }
830 
831  /*
832  * If we created a DB, connect to it. Also, if we changed DB
833  * properties, reconnect to ensure that relevant GUC settings are
834  * applied to our session.
835  */
836  if (strcmp(te->desc, "DATABASE") == 0 ||
837  strcmp(te->desc, "DATABASE PROPERTIES") == 0)
838  {
839  pg_log_info("connecting to new database \"%s\"", te->tag);
840  _reconnectToDB(AH, te->tag);
841  }
842  }
843 
844  /*
845  * If it has a data component that we want, then process that
846  */
847  if ((reqs & REQ_DATA) != 0)
848  {
849  /*
850  * hadDumper will be set if there is genuine data component for this
851  * node. Otherwise, we need to check the defn field for statements
852  * that need to be executed in data-only restores.
853  */
854  if (te->hadDumper)
855  {
856  /*
857  * If we can output the data, then restore it.
858  */
859  if (AH->PrintTocDataPtr != NULL)
860  {
861  _printTocEntry(AH, te, true);
862 
863  if (strcmp(te->desc, "BLOBS") == 0 ||
864  strcmp(te->desc, "BLOB COMMENTS") == 0)
865  {
866  pg_log_info("processing %s", te->desc);
867 
868  _selectOutputSchema(AH, "pg_catalog");
869 
870  /* Send BLOB COMMENTS data to ExecuteSimpleCommands() */
871  if (strcmp(te->desc, "BLOB COMMENTS") == 0)
872  AH->outputKind = OUTPUT_OTHERDATA;
873 
874  AH->PrintTocDataPtr(AH, te);
875 
876  AH->outputKind = OUTPUT_SQLCMDS;
877  }
878  else
879  {
880  _disableTriggersIfNecessary(AH, te);
881 
882  /* Select owner and schema as necessary */
883  _becomeOwner(AH, te);
884  _selectOutputSchema(AH, te->namespace);
885 
886  pg_log_info("processing data for table \"%s.%s\"",
887  te->namespace, te->tag);
888 
889  /*
890  * In parallel restore, if we created the table earlier in
891  * the run then we wrap the COPY in a transaction and
892  * precede it with a TRUNCATE. If archiving is not on
893  * this prevents WAL-logging the COPY. This obtains a
894  * speedup similar to that from using single_txn mode in
895  * non-parallel restores.
896  */
897  if (is_parallel && te->created)
898  {
899  /*
900  * Parallel restore is always talking directly to a
901  * server, so no need to see if we should issue BEGIN.
902  */
903  StartTransaction(&AH->public);
904 
905  /*
906  * If the server version is >= 8.4, make sure we issue
907  * TRUNCATE with ONLY so that child tables are not
908  * wiped.
909  */
910  ahprintf(AH, "TRUNCATE TABLE %s%s;\n\n",
911  (PQserverVersion(AH->connection) >= 80400 ?
912  "ONLY " : ""),
913  fmtQualifiedId(te->namespace, te->tag));
914  }
915 
916  /*
917  * If we have a copy statement, use it.
918  */
919  if (te->copyStmt && strlen(te->copyStmt) > 0)
920  {
921  ahprintf(AH, "%s", te->copyStmt);
922  AH->outputKind = OUTPUT_COPYDATA;
923  }
924  else
925  AH->outputKind = OUTPUT_OTHERDATA;
926 
927  AH->PrintTocDataPtr(AH, te);
928 
929  /*
930  * Terminate COPY if needed.
931  */
932  if (AH->outputKind == OUTPUT_COPYDATA &&
933  RestoringToDB(AH))
934  EndDBCopyMode(&AH->public, te->tag);
935  AH->outputKind = OUTPUT_SQLCMDS;
936 
937  /* close out the transaction started above */
938  if (is_parallel && te->created)
939  CommitTransaction(&AH->public);
940 
941  _enableTriggersIfNecessary(AH, te);
942  }
943  }
944  }
945  else if (!defnDumped)
946  {
947  /* If we haven't already dumped the defn part, do so now */
948  pg_log_info("executing %s %s", te->desc, te->tag);
949  _printTocEntry(AH, te, false);
950  }
951  }
952 
953  if (AH->public.n_errors > 0 && status == WORKER_OK)
954  status = WORKER_IGNORED_ERRORS;
955 
956  return status;
957 }
958 
959 /*
960  * Allocate a new RestoreOptions block.
961  * This is mainly so we can initialize it, but also for future expansion,
962  */
963 RestoreOptions *
964 NewRestoreOptions(void)
965 {
966  RestoreOptions *opts;
967 
968  opts = (RestoreOptions *) pg_malloc0(sizeof(RestoreOptions));
969 
970  /* set any fields that shouldn't default to zeroes */
971  opts->format = archUnknown;
972  opts->cparams.promptPassword = TRI_DEFAULT;
973  opts->dumpSections = DUMP_UNSECTIONED;
974 
975  return opts;
976 }
977 
978 static void
979 _disableTriggersIfNecessary(ArchiveHandle *AH, TocEntry *te)
980 {
981  RestoreOptions *ropt = AH->public.ropt;
982 
983  /* This hack is only needed in a data-only restore */
984  if (!ropt->dataOnly || !ropt->disable_triggers)
985  return;
986 
987  pg_log_info("disabling triggers for %s", te->tag);
988 
989  /*
990  * Become superuser if possible, since they are the only ones who can
991  * disable constraint triggers. If -S was not given, assume the initial
992  * user identity is a superuser. (XXX would it be better to become the
993  * table owner?)
994  */
995  _becomeUser(AH, ropt->superuser);
996 
997  /*
998  * Disable them.
999  */
1000  ahprintf(AH, "ALTER TABLE %s DISABLE TRIGGER ALL;\n\n",
1001  fmtQualifiedId(te->namespace, te->tag));
1002 }
1003 
1004 static void
1005 _enableTriggersIfNecessary(ArchiveHandle *AH, TocEntry *te)
1006 {
1007  RestoreOptions *ropt = AH->public.ropt;
1008 
1009  /* This hack is only needed in a data-only restore */
1010  if (!ropt->dataOnly || !ropt->disable_triggers)
1011  return;
1012 
1013  pg_log_info("enabling triggers for %s", te->tag);
1014 
1015  /*
1016  * Become superuser if possible, since they are the only ones who can
1017  * disable constraint triggers. If -S was not given, assume the initial
1018  * user identity is a superuser. (XXX would it be better to become the
1019  * table owner?)
1020  */
1021  _becomeUser(AH, ropt->superuser);
1022 
1023  /*
1024  * Enable them.
1025  */
1026  ahprintf(AH, "ALTER TABLE %s ENABLE TRIGGER ALL;\n\n",
1027  fmtQualifiedId(te->namespace, te->tag));
1028 }
1029 
1030 /*
1031  * This is a routine that is part of the dumper interface, hence the 'Archive*' parameter.
1032  */
1033 
1034 /* Public */
1035 void
1036 WriteData(Archive *AHX, const void *data, size_t dLen)
1037 {
1038  ArchiveHandle *AH = (ArchiveHandle *) AHX;
1039 
1040  if (!AH->currToc)
1041  fatal("internal error -- WriteData cannot be called outside the context of a DataDumper routine");
1042 
1043  AH->WriteDataPtr(AH, data, dLen);
1044 }
1045 
1046 /*
1047  * Create a new TOC entry. The TOC was designed as a TOC, but is now the
1048  * repository for all metadata. But the name has stuck.
1049  *
1050  * The new entry is added to the Archive's TOC list. Most callers can ignore
1051  * the result value because nothing else need be done, but a few want to
1052  * manipulate the TOC entry further.
1053  */
1054 
1055 /* Public */
1056 TocEntry *
1057 ArchiveEntry(Archive *AHX, CatalogId catalogId, DumpId dumpId,
1058  ArchiveOpts *opts)
1059 {
1060  ArchiveHandle *AH = (ArchiveHandle *) AHX;
1061  TocEntry *newToc;
1062 
1063  newToc = (TocEntry *) pg_malloc0(sizeof(TocEntry));
1064 
1065  AH->tocCount++;
1066  if (dumpId > AH->maxDumpId)
1067  AH->maxDumpId = dumpId;
1068 
1069  newToc->prev = AH->toc->prev;
1070  newToc->next = AH->toc;
1071  AH->toc->prev->next = newToc;
1072  AH->toc->prev = newToc;
1073 
1074  newToc->catalogId = catalogId;
1075  newToc->dumpId = dumpId;
1076  newToc->section = opts->section;
1077 
1078  newToc->tag = pg_strdup(opts->tag);
1079  newToc->namespace = opts->namespace ? pg_strdup(opts->namespace) : NULL;
1080  newToc->tablespace = opts->tablespace ? pg_strdup(opts->tablespace) : NULL;
1081  newToc->tableam = opts->tableam ? pg_strdup(opts->tableam) : NULL;
1082  newToc->owner = opts->owner ? pg_strdup(opts->owner) : NULL;
1083  newToc->desc = pg_strdup(opts->description);
1084  newToc->defn = opts->createStmt ? pg_strdup(opts->createStmt) : NULL;
1085  newToc->dropStmt = opts->dropStmt ? pg_strdup(opts->dropStmt) : NULL;
1086  newToc->copyStmt = opts->copyStmt ? pg_strdup(opts->copyStmt) : NULL;
1087 
1088  if (opts->nDeps > 0)
1089  {
1090  newToc->dependencies = (DumpId *) pg_malloc(opts->nDeps * sizeof(DumpId));
1091  memcpy(newToc->dependencies, opts->deps, opts->nDeps * sizeof(DumpId));
1092  newToc->nDeps = opts->nDeps;
1093  }
1094  else
1095  {
1096  newToc->dependencies = NULL;
1097  newToc->nDeps = 0;
1098  }
1099 
1100  newToc->dataDumper = opts->dumpFn;
1101  newToc->dataDumperArg = opts->dumpArg;
1102  newToc->hadDumper = opts->dumpFn ? true : false;
1103 
1104  newToc->formatData = NULL;
1105  newToc->dataLength = 0;
1106 
1107  if (AH->ArchiveEntryPtr != NULL)
1108  AH->ArchiveEntryPtr(AH, newToc);
1109 
1110  return newToc;
1111 }
1112 
1113 /* Public */
1114 void
1115 PrintTOCSummary(Archive *AHX)
1116 {
1117  ArchiveHandle *AH = (ArchiveHandle *) AHX;
1118  RestoreOptions *ropt = AH->public.ropt;
1119  TocEntry *te;
1120  teSection curSection;
1121  OutputContext sav;
1122  const char *fmtName;
1123  char stamp_str[64];
1124 
1125  sav = SaveOutput(AH);
1126  if (ropt->filename)
1127  SetOutput(AH, ropt->filename, 0 /* no compression */ );
1128 
1129  if (strftime(stamp_str, sizeof(stamp_str), PGDUMP_STRFTIME_FMT,
1130  localtime(&AH->createDate)) == 0)
1131  strcpy(stamp_str, "[unknown]");
1132 
1133  ahprintf(AH, ";\n; Archive created at %s\n", stamp_str);
1134  ahprintf(AH, "; dbname: %s\n; TOC Entries: %d\n; Compression: %d\n",
1135  sanitize_line(AH->archdbname, false),
1136  AH->tocCount, AH->compression);
1137 
1138  switch (AH->format)
1139  {
1140  case archCustom:
1141  fmtName = "CUSTOM";
1142  break;
1143  case archDirectory:
1144  fmtName = "DIRECTORY";
1145  break;
1146  case archTar:
1147  fmtName = "TAR";
1148  break;
1149  default:
1150  fmtName = "UNKNOWN";
1151  }
1152 
1153  ahprintf(AH, "; Dump Version: %d.%d-%d\n",
1154  ARCHIVE_MAJOR(AH->version), ARCHIVE_MINOR(AH->version), ARCHIVE_REV(AH->version));
1155  ahprintf(AH, "; Format: %s\n", fmtName);
1156  ahprintf(AH, "; Integer: %d bytes\n", (int) AH->intSize);
1157  ahprintf(AH, "; Offset: %d bytes\n", (int) AH->offSize);
1158  if (AH->archiveRemoteVersion)
1159  ahprintf(AH, "; Dumped from database version: %s\n",
1160  AH->archiveRemoteVersion);
1161  if (AH->archiveDumpVersion)
1162  ahprintf(AH, "; Dumped by pg_dump version: %s\n",
1163  AH->archiveDumpVersion);
1164 
1165  ahprintf(AH, ";\n;\n; Selected TOC Entries:\n;\n");
1166 
1167  curSection = SECTION_PRE_DATA;
1168  for (te = AH->toc->next; te != AH->toc; te = te->next)
1169  {
1170  if (te->section != SECTION_NONE)
1171  curSection = te->section;
1172  if (ropt->verbose ||
1173  (_tocEntryRequired(te, curSection, AH) & (REQ_SCHEMA | REQ_DATA)) != 0)
1174  {
1175  char *sanitized_name;
1176  char *sanitized_schema;
1177  char *sanitized_owner;
1178 
1179  /*
1180  */
1181  sanitized_name = sanitize_line(te->tag, false);
1182  sanitized_schema = sanitize_line(te->namespace, true);
1183  sanitized_owner = sanitize_line(te->owner, false);
1184 
1185  ahprintf(AH, "%d; %u %u %s %s %s %s\n", te->dumpId,
1186  te->catalogId.tableoid, te->catalogId.oid,
1187  te->desc, sanitized_schema, sanitized_name,
1188  sanitized_owner);
1189 
1190  free(sanitized_name);
1191  free(sanitized_schema);
1192  free(sanitized_owner);
1193  }
1194  if (ropt->verbose && te->nDeps > 0)
1195  {
1196  int i;
1197 
1198  ahprintf(AH, ";\tdepends on:");
1199  for (i = 0; i < te->nDeps; i++)
1200  ahprintf(AH, " %d", te->dependencies[i]);
1201  ahprintf(AH, "\n");
1202  }
1203  }
1204 
1205  /* Enforce strict names checking */
1206  if (ropt->strict_names)
1207  StrictNamesCheck(ropt);
1208 
1209  if (ropt->filename)
1210  RestoreOutput(AH, sav);
1211 }
1212 
1213 /***********
1214  * BLOB Archival
1215  ***********/
1216 
1217 /* Called by a dumper to signal start of a BLOB */
1218 int
1219 StartBlob(Archive *AHX, Oid oid)
1220 {
1221  ArchiveHandle *AH = (ArchiveHandle *) AHX;
1222 
1223  if (!AH->StartBlobPtr)
1224  fatal("large-object output not supported in chosen format");
1225 
1226  AH->StartBlobPtr(AH, AH->currToc, oid);
1227 
1228  return 1;
1229 }
1230 
1231 /* Called by a dumper to signal end of a BLOB */
1232 int
1233 EndBlob(Archive *AHX, Oid oid)
1234 {
1235  ArchiveHandle *AH = (ArchiveHandle *) AHX;
1236 
1237  if (AH->EndBlobPtr)
1238  AH->EndBlobPtr(AH, AH->currToc, oid);
1239 
1240  return 1;
1241 }
1242 
1243 /**********
1244  * BLOB Restoration
1245  **********/
1246 
1247 /*
1248  * Called by a format handler before any blobs are restored
1249  */
1250 void
1251 StartRestoreBlobs(ArchiveHandle *AH)
1252 {
1253  RestoreOptions *ropt = AH->public.ropt;
1254 
1255  if (!ropt->single_txn)
1256  {
1257  if (AH->connection)
1258  StartTransaction(&AH->public);
1259  else
1260  ahprintf(AH, "BEGIN;\n\n");
1261  }
1262 
1263  AH->blobCount = 0;
1264 }
1265 
1266 /*
1267  * Called by a format handler after all blobs are restored
1268  */
1269 void
1270 EndRestoreBlobs(ArchiveHandle *AH)
1271 {
1272  RestoreOptions *ropt = AH->public.ropt;
1273 
1274  if (!ropt->single_txn)
1275  {
1276  if (AH->connection)
1277  CommitTransaction(&AH->public);
1278  else
1279  ahprintf(AH, "COMMIT;\n\n");
1280  }
1281 
1282  pg_log_info(ngettext("restored %d large object",
1283  "restored %d large objects",
1284  AH->blobCount),
1285  AH->blobCount);
1286 }
1287 
1288 
1289 /*
1290  * Called by a format handler to initiate restoration of a blob
1291  */
1292 void
1293 StartRestoreBlob(ArchiveHandle *AH, Oid oid, bool drop)
1294 {
1295  bool old_blob_style = (AH->version < K_VERS_1_12);
1296  Oid loOid;
1297 
1298  AH->blobCount++;
1299 
1300  /* Initialize the LO Buffer */
1301  AH->lo_buf_used = 0;
1302 
1303  pg_log_info("restoring large object with OID %u", oid);
1304 
1305  /* With an old archive we must do drop and create logic here */
1306  if (old_blob_style && drop)
1307  DropBlobIfExists(AH, oid);
1308 
1309  if (AH->connection)
1310  {
1311  if (old_blob_style)
1312  {
1313  loOid = lo_create(AH->connection, oid);
1314  if (loOid == 0 || loOid != oid)
1315  fatal("could not create large object %u: %s",
1316  oid, PQerrorMessage(AH->connection));
1317  }
1318  AH->loFd = lo_open(AH->connection, oid, INV_WRITE);
1319  if (AH->loFd == -1)
1320  fatal("could not open large object %u: %s",
1321  oid, PQerrorMessage(AH->connection));
1322  }
1323  else
1324  {
1325  if (old_blob_style)
1326  ahprintf(AH, "SELECT pg_catalog.lo_open(pg_catalog.lo_create('%u'), %d);\n",
1327  oid, INV_WRITE);
1328  else
1329  ahprintf(AH, "SELECT pg_catalog.lo_open('%u', %d);\n",
1330  oid, INV_WRITE);
1331  }
1332 
1333  AH->writingBlob = 1;
1334 }
1335 
1336 void
1337 EndRestoreBlob(ArchiveHandle *AH, Oid oid)
1338 {
1339  if (AH->lo_buf_used > 0)
1340  {
1341  /* Write remaining bytes from the LO buffer */
1342  dump_lo_buf(AH);
1343  }
1344 
1345  AH->writingBlob = 0;
1346 
1347  if (AH->connection)
1348  {
1349  lo_close(AH->connection, AH->loFd);
1350  AH->loFd = -1;
1351  }
1352  else
1353  {
1354  ahprintf(AH, "SELECT pg_catalog.lo_close(0);\n\n");
1355  }
1356 }
1357 
1358 /***********
1359  * Sorting and Reordering
1360  ***********/
1361 
1362 void
1363 SortTocFromFile(Archive *AHX)
1364 {
1365  ArchiveHandle *AH = (ArchiveHandle *) AHX;
1366  RestoreOptions *ropt = AH->public.ropt;
1367  FILE *fh;
1368  StringInfoData linebuf;
1369 
1370  /* Allocate space for the 'wanted' array, and init it */
1371  ropt->idWanted = (bool *) pg_malloc0(sizeof(bool) * AH->maxDumpId);
1372 
1373  /* Setup the file */
1374  fh = fopen(ropt->tocFile, PG_BINARY_R);
1375  if (!fh)
1376  fatal("could not open TOC file \"%s\": %m", ropt->tocFile);
1377 
1378  initStringInfo(&linebuf);
1379 
1380  while (pg_get_line_buf(fh, &linebuf))
1381  {
1382  char *cmnt;
1383  char *endptr;
1384  DumpId id;
1385  TocEntry *te;
1386 
1387  /* Truncate line at comment, if any */
1388  cmnt = strchr(linebuf.data, ';');
1389  if (cmnt != NULL)
1390  {
1391  cmnt[0] = '\0';
1392  linebuf.len = cmnt - linebuf.data;
1393  }
1394 
1395  /* Ignore if all blank */
1396  if (strspn(linebuf.data, " \t\r\n") == linebuf.len)
1397  continue;
1398 
1399  /* Get an ID, check it's valid and not already seen */
1400  id = strtol(linebuf.data, &endptr, 10);
1401  if (endptr == linebuf.data || id <= 0 || id > AH->maxDumpId ||
1402  ropt->idWanted[id - 1])
1403  {
1404  pg_log_warning("line ignored: %s", linebuf.data);
1405  continue;
1406  }
1407 
1408  /* Find TOC entry */
1409  te = getTocEntryByDumpId(AH, id);
1410  if (!te)
1411  fatal("could not find entry for ID %d",
1412  id);
1413 
1414  /* Mark it wanted */
1415  ropt->idWanted[id - 1] = true;
1416 
1417  /*
1418  * Move each item to the end of the list as it is selected, so that
1419  * they are placed in the desired order. Any unwanted items will end
1420  * up at the front of the list, which may seem unintuitive but it's
1421  * what we need. In an ordinary serial restore that makes no
1422  * difference, but in a parallel restore we need to mark unrestored
1423  * items' dependencies as satisfied before we start examining
1424  * restorable items. Otherwise they could have surprising
1425  * side-effects on the order in which restorable items actually get
1426  * restored.
1427  */
1428  _moveBefore(AH->toc, te);
1429  }
1430 
1431  pg_free(linebuf.data);
1432 
1433  if (fclose(fh) != 0)
1434  fatal("could not close TOC file: %m");
1435 }
1436 
1437 /**********************
1438  * Convenience functions that look like standard IO functions
1439  * for writing data when in dump mode.
1440  **********************/
1441 
1442 /* Public */
1443 void
1444 archputs(const char *s, Archive *AH)
1445 {
1446  WriteData(AH, s, strlen(s));
1447 }
1448 
1449 /* Public */
1450 int
1451 archprintf(Archive *AH, const char *fmt,...)
1452 {
1453  int save_errno = errno;
1454  char *p;
1455  size_t len = 128; /* initial assumption about buffer size */
1456  size_t cnt;
1457 
1458  for (;;)
1459  {
1460  va_list args;
1461 
1462  /* Allocate work buffer. */
1463  p = (char *) pg_malloc(len);
1464 
1465  /* Try to format the data. */
1466  errno = save_errno;
1467  va_start(args, fmt);
1468  cnt = pvsnprintf(p, len, fmt, args);
1469  va_end(args);
1470 
1471  if (cnt < len)
1472  break; /* success */
1473 
1474  /* Release buffer and loop around to try again with larger len. */
1475  free(p);
1476  len = cnt;
1477  }
1478 
1479  WriteData(AH, p, cnt);
1480  free(p);
1481  return (int) cnt;
1482 }
1483 
1484 
1485 /*******************************
1486  * Stuff below here should be 'private' to the archiver routines
1487  *******************************/
1488 
1489 static void
1490 SetOutput(ArchiveHandle *AH, const char *filename, int compression)
1491 {
1492  int fn;
1493 
1494  if (filename)
1495  {
1496  if (strcmp(filename, "-") == 0)
1497  fn = fileno(stdout);
1498  else
1499  fn = -1;
1500  }
1501  else if (AH->FH)
1502  fn = fileno(AH->FH);
1503  else if (AH->fSpec)
1504  {
1505  fn = -1;
1506  filename = AH->fSpec;
1507  }
1508  else
1509  fn = fileno(stdout);
1510 
1511  /* If compression explicitly requested, use gzopen */
1512 #ifdef HAVE_LIBZ
1513  if (compression != 0)
1514  {
1515  char fmode[14];
1516 
1517  /* Don't use PG_BINARY_x since this is zlib */
1518  sprintf(fmode, "wb%d", compression);
1519  if (fn >= 0)
1520  AH->OF = gzdopen(dup(fn), fmode);
1521  else
1522  AH->OF = gzopen(filename, fmode);
1523  AH->gzOut = 1;
1524  }
1525  else
1526 #endif
1527  { /* Use fopen */
1528  if (AH->mode == archModeAppend)
1529  {
1530  if (fn >= 0)
1531  AH->OF = fdopen(dup(fn), PG_BINARY_A);
1532  else
1533  AH->OF = fopen(filename, PG_BINARY_A);
1534  }
1535  else
1536  {
1537  if (fn >= 0)
1538  AH->OF = fdopen(dup(fn), PG_BINARY_W);
1539  else
1540  AH->OF = fopen(filename, PG_BINARY_W);
1541  }
1542  AH->gzOut = 0;
1543  }
1544 
1545  if (!AH->OF)
1546  {
1547  if (filename)
1548  fatal("could not open output file \"%s\": %m", filename);
1549  else
1550  fatal("could not open output file: %m");
1551  }
1552 }
1553 
1554 static OutputContext
1555 SaveOutput(ArchiveHandle *AH)
1556 {
1557  OutputContext sav;
1558 
1559  sav.OF = AH->OF;
1560  sav.gzOut = AH->gzOut;
1561 
1562  return sav;
1563 }
1564 
1565 static void
1566 RestoreOutput(ArchiveHandle *AH, OutputContext savedContext)
1567 {
1568  int res;
1569 
1570  if (AH->gzOut)
1571  res = GZCLOSE(AH->OF);
1572  else
1573  res = fclose(AH->OF);
1574 
1575  if (res != 0)
1576  fatal("could not close output file: %m");
1577 
1578  AH->gzOut = savedContext.gzOut;
1579  AH->OF = savedContext.OF;
1580 }
1581 
1582 
1583 
1584 /*
1585  * Print formatted text to the output file (usually stdout).
1586  */
1587 int
1588 ahprintf(ArchiveHandle *AH, const char *fmt,...)
1589 {
1590  int save_errno = errno;
1591  char *p;
1592  size_t len = 128; /* initial assumption about buffer size */
1593  size_t cnt;
1594 
1595  for (;;)
1596  {
1597  va_list args;
1598 
1599  /* Allocate work buffer. */
1600  p = (char *) pg_malloc(len);
1601 
1602  /* Try to format the data. */
1603  errno = save_errno;
1604  va_start(args, fmt);
1605  cnt = pvsnprintf(p, len, fmt, args);
1606  va_end(args);
1607 
1608  if (cnt < len)
1609  break; /* success */
1610 
1611  /* Release buffer and loop around to try again with larger len. */
1612  free(p);
1613  len = cnt;
1614  }
1615 
1616  ahwrite(p, 1, cnt, AH);
1617  free(p);
1618  return (int) cnt;
1619 }
1620 
1621 /*
1622  * Single place for logic which says 'We are restoring to a direct DB connection'.
1623  */
1624 static int
1625 RestoringToDB(ArchiveHandle *AH)
1626 {
1627  RestoreOptions *ropt = AH->public.ropt;
1628 
1629  return (ropt && ropt->useDB && AH->connection);
1630 }
1631 
1632 /*
1633  * Dump the current contents of the LO data buffer while writing a BLOB
1634  */
1635 static void
1636 dump_lo_buf(ArchiveHandle *AH)
1637 {
1638  if (AH->connection)
1639  {
1640  int res;
1641 
1642  res = lo_write(AH->connection, AH->loFd, AH->lo_buf, AH->lo_buf_used);
1643  pg_log_debug(ngettext("wrote %zu byte of large object data (result = %d)",
1644  "wrote %zu bytes of large object data (result = %d)",
1645  AH->lo_buf_used),
1646  AH->lo_buf_used, res);
1647  /* We assume there are no short writes, only errors */
1648  if (res != AH->lo_buf_used)
1649  warn_or_exit_horribly(AH, "could not write to large object: %s",
1650  PQerrorMessage(AH->connection));
1651  }
1652  else
1653  {
1654  PQExpBuffer buf = createPQExpBuffer();
1655 
1656  appendByteaLiteralAHX(buf,
1657  (const unsigned char *) AH->lo_buf,
1658  AH->lo_buf_used,
1659  AH);
1660 
1661  /* Hack: turn off writingBlob so ahwrite doesn't recurse to here */
1662  AH->writingBlob = 0;
1663  ahprintf(AH, "SELECT pg_catalog.lowrite(0, %s);\n", buf->data);
1664  AH->writingBlob = 1;
1665 
1666  destroyPQExpBuffer(buf);
1667  }
1668  AH->lo_buf_used = 0;
1669 }
1670 
1671 
1672 /*
1673  * Write buffer to the output file (usually stdout). This is used for
1674  * outputting 'restore' scripts etc. It is even possible for an archive
1675  * format to create a custom output routine to 'fake' a restore if it
1676  * wants to generate a script (see TAR output).
1677  */
1678 void
1679 ahwrite(const void *ptr, size_t size, size_t nmemb, ArchiveHandle *AH)
1680 {
1681  int bytes_written = 0;
1682 
1683  if (AH->writingBlob)
1684  {
1685  size_t remaining = size * nmemb;
1686 
1687  while (AH->lo_buf_used + remaining > AH->lo_buf_size)
1688  {
1689  size_t avail = AH->lo_buf_size - AH->lo_buf_used;
1690 
1691  memcpy((char *) AH->lo_buf + AH->lo_buf_used, ptr, avail);
1692  ptr = (const void *) ((const char *) ptr + avail);
1693  remaining -= avail;
1694  AH->lo_buf_used += avail;
1695  dump_lo_buf(AH);
1696  }
1697 
1698  memcpy((char *) AH->lo_buf + AH->lo_buf_used, ptr, remaining);
1699  AH->lo_buf_used += remaining;
1700 
1701  bytes_written = size * nmemb;
1702  }
1703  else if (AH->gzOut)
1704  bytes_written = GZWRITE(ptr, size, nmemb, AH->OF);
1705  else if (AH->CustomOutPtr)
1706  bytes_written = AH->CustomOutPtr(AH, ptr, size * nmemb);
1707 
1708  else
1709  {
1710  /*
1711  * If we're doing a restore, and it's direct to DB, and we're
1712  * connected then send it to the DB.
1713  */
1714  if (RestoringToDB(AH))
1715  bytes_written = ExecuteSqlCommandBuf(&AH->public, (const char *) ptr, size * nmemb);
1716  else
1717  bytes_written = fwrite(ptr, size, nmemb, AH->OF) * size;
1718  }
1719 
1720  if (bytes_written != size * nmemb)
1721  WRITE_ERROR_EXIT;
1722 }
1723 
1724 /* on some error, we may decide to go on... */
1725 void
1726 warn_or_exit_horribly(ArchiveHandle *AH, const char *fmt,...)
1727 {
1728  va_list ap;
1729 
1730  switch (AH->stage)
1731  {
1732 
1733  case STAGE_NONE:
1734  /* Do nothing special */
1735  break;
1736 
1737  case STAGE_INITIALIZING:
1738  if (AH->stage != AH->lastErrorStage)
1739  pg_log_generic(PG_LOG_INFO, "while INITIALIZING:");
1740  break;
1741 
1742  case STAGE_PROCESSING:
1743  if (AH->stage != AH->lastErrorStage)
1744  pg_log_generic(PG_LOG_INFO, "while PROCESSING TOC:");
1745  break;
1746 
1747  case STAGE_FINALIZING:
1748  if (AH->stage != AH->lastErrorStage)
1749  pg_log_generic(PG_LOG_INFO, "while FINALIZING:");
1750  break;
1751  }
1752  if (AH->currentTE != NULL && AH->currentTE != AH->lastErrorTE)
1753  {
1754  pg_log_generic(PG_LOG_INFO, "from TOC entry %d; %u %u %s %s %s",
1755  AH->currentTE->dumpId,
1756  AH->currentTE->catalogId.tableoid,
1757  AH->currentTE->catalogId.oid,
1758  AH->currentTE->desc ? AH->currentTE->desc : "(no desc)",
1759  AH->currentTE->tag ? AH->currentTE->tag : "(no tag)",
1760  AH->currentTE->owner ? AH->currentTE->owner : "(no owner)");
1761  }
1762  AH->lastErrorStage = AH->stage;
1763  AH->lastErrorTE = AH->currentTE;
1764 
1765  va_start(ap, fmt);
1766  pg_log_generic_v(PG_LOG_ERROR, fmt, ap);
1767  va_end(ap);
1768 
1769  if (AH->public.exit_on_error)
1770  exit_nicely(1);
1771  else
1772  AH->public.n_errors++;
1773 }
1774 
1775 #ifdef NOT_USED
1776 
1777 static void
1778 _moveAfter(ArchiveHandle *AH, TocEntry *pos, TocEntry *te)
1779 {
1780  /* Unlink te from list */
1781  te->prev->next = te->next;
1782  te->next->prev = te->prev;
1783 
1784  /* and insert it after "pos" */
1785  te->prev = pos;
1786  te->next = pos->next;
1787  pos->next->prev = te;
1788  pos->next = te;
1789 }
1790 #endif
1791 
1792 static void
1793 _moveBefore(TocEntry *pos, TocEntry *te)
1794 {
1795  /* Unlink te from list */
1796  te->prev->next = te->next;
1797  te->next->prev = te->prev;
1798 
1799  /* and insert it before "pos" */
1800  te->prev = pos->prev;
1801  te->next = pos;
1802  pos->prev->next = te;
1803  pos->prev = te;
1804 }
1805 
1806 /*
1807  * Build index arrays for the TOC list
1808  *
1809  * This should be invoked only after we have created or read in all the TOC
1810  * items.
1811  *
1812  * The arrays are indexed by dump ID (so entry zero is unused). Note that the
1813  * array entries run only up to maxDumpId. We might see dependency dump IDs
1814  * beyond that (if the dump was partial); so always check the array bound
1815  * before trying to touch an array entry.
1816  */
1817 static void
1818 buildTocEntryArrays(ArchiveHandle *AH)
1819 {
1820  DumpId maxDumpId = AH->maxDumpId;
1821  TocEntry *te;
1822 
1823  AH->tocsByDumpId = (TocEntry **) pg_malloc0((maxDumpId + 1) * sizeof(TocEntry *));
1824  AH->tableDataId = (DumpId *) pg_malloc0((maxDumpId + 1) * sizeof(DumpId));
1825 
1826  for (te = AH->toc->next; te != AH->toc; te = te->next)
1827  {
1828  /* this check is purely paranoia, maxDumpId should be correct */
1829  if (te->dumpId <= 0 || te->dumpId > maxDumpId)
1830  fatal("bad dumpId");
1831 
1832  /* tocsByDumpId indexes all TOCs by their dump ID */
1833  AH->tocsByDumpId[te->dumpId] = te;
1834 
1835  /*
1836  * tableDataId provides the TABLE DATA item's dump ID for each TABLE
1837  * TOC entry that has a DATA item. We compute this by reversing the
1838  * TABLE DATA item's dependency, knowing that a TABLE DATA item has
1839  * just one dependency and it is the TABLE item.
1840  */
1841  if (strcmp(te->desc, "TABLE DATA") == 0 && te->nDeps > 0)
1842  {
1843  DumpId tableId = te->dependencies[0];
1844 
1845  /*
1846  * The TABLE item might not have been in the archive, if this was
1847  * a data-only dump; but its dump ID should be less than its data
1848  * item's dump ID, so there should be a place for it in the array.
1849  */
1850  if (tableId <= 0 || tableId > maxDumpId)
1851  fatal("bad table dumpId for TABLE DATA item");
1852 
1853  AH->tableDataId[tableId] = te->dumpId;
1854  }
1855  }
1856 }
1857 
1858 TocEntry *
1859 getTocEntryByDumpId(ArchiveHandle *AH, DumpId id)
1860 {
1861  /* build index arrays if we didn't already */
1862  if (AH->tocsByDumpId == NULL)
1863  buildTocEntryArrays(AH);
1864 
1865  if (id > 0 && id <= AH->maxDumpId)
1866  return AH->tocsByDumpId[id];
1867 
1868  return NULL;
1869 }
1870 
1871 int
1872 TocIDRequired(ArchiveHandle *AH, DumpId id)
1873 {
1874  TocEntry *te = getTocEntryByDumpId(AH, id);
1875 
1876  if (!te)
1877  return 0;
1878 
1879  return te->reqs;
1880 }
1881 
1882 size_t
1883 WriteOffset(ArchiveHandle *AH, pgoff_t o, int wasSet)
1884 {
1885  int off;
1886 
1887  /* Save the flag */
1888  AH->WriteBytePtr(AH, wasSet);
1889 
1890  /* Write out pgoff_t smallest byte first, prevents endian mismatch */
1891  for (off = 0; off < sizeof(pgoff_t); off++)
1892  {
1893  AH->WriteBytePtr(AH, o & 0xFF);
1894  o >>= 8;
1895  }
1896  return sizeof(pgoff_t) + 1;
1897 }
1898 
1899 int
1900 ReadOffset(ArchiveHandle *AH, pgoff_t * o)
1901 {
1902  int i;
1903  int off;
1904  int offsetFlg;
1905 
1906  /* Initialize to zero */
1907  *o = 0;
1908 
1909  /* Check for old version */
1910  if (AH->version < K_VERS_1_7)
1911  {
1912  /* Prior versions wrote offsets using WriteInt */
1913  i = ReadInt(AH);
1914  /* -1 means not set */
1915  if (i < 0)
1916  return K_OFFSET_POS_NOT_SET;
1917  else if (i == 0)
1918  return K_OFFSET_NO_DATA;
1919 
1920  /* Cast to pgoff_t because it was written as an int. */
1921  *o = (pgoff_t) i;
1922  return K_OFFSET_POS_SET;
1923  }
1924 
1925  /*
1926  * Read the flag indicating the state of the data pointer. Check if valid
1927  * and die if not.
1928  *
1929  * This used to be handled by a negative or zero pointer, now we use an
1930  * extra byte specifically for the state.
1931  */
1932  offsetFlg = AH->ReadBytePtr(AH) & 0xFF;
1933 
1934  switch (offsetFlg)
1935  {
1936  case K_OFFSET_POS_NOT_SET:
1937  case K_OFFSET_NO_DATA:
1938  case K_OFFSET_POS_SET:
1939 
1940  break;
1941 
1942  default:
1943  fatal("unexpected data offset flag %d", offsetFlg);
1944  }
1945 
1946  /*
1947  * Read the bytes
1948  */
1949  for (off = 0; off < AH->offSize; off++)
1950  {
1951  if (off < sizeof(pgoff_t))
1952  *o |= ((pgoff_t) (AH->ReadBytePtr(AH))) << (off * 8);
1953  else
1954  {
1955  if (AH->ReadBytePtr(AH) != 0)
1956  fatal("file offset in dump file is too large");
1957  }
1958  }
1959 
1960  return offsetFlg;
1961 }
1962 
1963 size_t
1964 WriteInt(ArchiveHandle *AH, int i)
1965 {
1966  int b;
1967 
1968  /*
1969  * This is a bit yucky, but I don't want to make the binary format very
1970  * dependent on representation, and not knowing much about it, I write out
1971  * a sign byte. If you change this, don't forget to change the file
1972  * version #, and modify ReadInt to read the new format AS WELL AS the old
1973  * formats.
1974  */
1975 
1976  /* SIGN byte */
1977  if (i < 0)
1978  {
1979  AH->WriteBytePtr(AH, 1);
1980  i = -i;
1981  }
1982  else
1983  AH->WriteBytePtr(AH, 0);
1984 
1985  for (b = 0; b < AH->intSize; b++)
1986  {
1987  AH->WriteBytePtr(AH, i & 0xFF);
1988  i >>= 8;
1989  }
1990 
1991  return AH->intSize + 1;
1992 }
1993 
1994 int
1995 ReadInt(ArchiveHandle *AH)
1996 {
1997  int res = 0;
1998  int bv,
1999  b;
2000  int sign = 0; /* Default positive */
2001  int bitShift = 0;
2002 
2003  if (AH->version > K_VERS_1_0)
2004  /* Read a sign byte */
2005  sign = AH->ReadBytePtr(AH);
2006 
2007  for (b = 0; b < AH->intSize; b++)
2008  {
2009  bv = AH->ReadBytePtr(AH) & 0xFF;
2010  if (bv != 0)
2011  res = res + (bv << bitShift);
2012  bitShift += 8;
2013  }
2014 
2015  if (sign)
2016  res = -res;
2017 
2018  return res;
2019 }
2020 
2021 size_t
2022 WriteStr(ArchiveHandle *AH, const char *c)
2023 {
2024  size_t res;
2025 
2026  if (c)
2027  {
2028  int len = strlen(c);
2029 
2030  res = WriteInt(AH, len);
2031  AH->WriteBufPtr(AH, c, len);
2032  res += len;
2033  }
2034  else
2035  res = WriteInt(AH, -1);
2036 
2037  return res;
2038 }
2039 
2040 char *
2041 ReadStr(ArchiveHandle *AH)
2042 {
2043  char *buf;
2044  int l;
2045 
2046  l = ReadInt(AH);
2047  if (l < 0)
2048  buf = NULL;
2049  else
2050  {
2051  buf = (char *) pg_malloc(l + 1);
2052  AH->ReadBufPtr(AH, (void *) buf, l);
2053 
2054  buf[l] = '\0';
2055  }
2056 
2057  return buf;
2058 }
2059 
2060 static int
2061 _discoverArchiveFormat(ArchiveHandle *AH)
2062 {
2063  FILE *fh;
2064  char sig[6]; /* More than enough */
2065  size_t cnt;
2066  int wantClose = 0;
2067 
2068  pg_log_debug("attempting to ascertain archive format");
2069 
2070  if (AH->lookahead)
2071  free(AH->lookahead);
2072 
2073  AH->readHeader = 0;
2074  AH->lookaheadSize = 512;
2075  AH->lookahead = pg_malloc0(512);
2076  AH->lookaheadLen = 0;
2077  AH->lookaheadPos = 0;
2078 
2079  if (AH->fSpec)
2080  {
2081  struct stat st;
2082 
2083  wantClose = 1;
2084 
2085  /*
2086  * Check if the specified archive is a directory. If so, check if
2087  * there's a "toc.dat" (or "toc.dat.gz") file in it.
2088  */
2089  if (stat(AH->fSpec, &st) == 0 && S_ISDIR(st.st_mode))
2090  {
2091  char buf[MAXPGPATH];
2092 
2093  if (snprintf(buf, MAXPGPATH, "%s/toc.dat", AH->fSpec) >= MAXPGPATH)
2094  fatal("directory name too long: \"%s\"",
2095  AH->fSpec);
2096  if (stat(buf, &st) == 0 && S_ISREG(st.st_mode))
2097  {
2098  AH->format = archDirectory;
2099  return AH->format;
2100  }
2101 
2102 #ifdef HAVE_LIBZ
2103  if (snprintf(buf, MAXPGPATH, "%s/toc.dat.gz", AH->fSpec) >= MAXPGPATH)
2104  fatal("directory name too long: \"%s\"",
2105  AH->fSpec);
2106  if (stat(buf, &st) == 0 && S_ISREG(st.st_mode))
2107  {
2108  AH->format = archDirectory;
2109  return AH->format;
2110  }
2111 #endif
2112  fatal("directory \"%s\" does not appear to be a valid archive (\"toc.dat\" does not exist)",
2113  AH->fSpec);
2114  fh = NULL; /* keep compiler quiet */
2115  }
2116  else
2117  {
2118  fh = fopen(AH->fSpec, PG_BINARY_R);
2119  if (!fh)
2120  fatal("could not open input file \"%s\": %m", AH->fSpec);
2121  }
2122  }
2123  else
2124  {
2125  fh = stdin;
2126  if (!fh)
2127  fatal("could not open input file: %m");
2128  }
2129 
2130  if ((cnt = fread(sig, 1, 5, fh)) != 5)
2131  {
2132  if (ferror(fh))
2133  fatal("could not read input file: %m");
2134  else
2135  fatal("input file is too short (read %lu, expected 5)",
2136  (unsigned long) cnt);
2137  }
2138 
2139  /* Save it, just in case we need it later */
2140  memcpy(&AH->lookahead[0], sig, 5);
2141  AH->lookaheadLen = 5;
2142 
2143  if (strncmp(sig, "PGDMP", 5) == 0)
2144  {
2145  /* It's custom format, stop here */
2146  AH->format = archCustom;
2147  AH->readHeader = 1;
2148  }
2149  else
2150  {
2151  /*
2152  * *Maybe* we have a tar archive format file or a text dump ... So,
2153  * read first 512 byte header...
2154  */
2155  cnt = fread(&AH->lookahead[AH->lookaheadLen], 1, 512 - AH->lookaheadLen, fh);
2156  /* read failure is checked below */
2157  AH->lookaheadLen += cnt;
2158 
2159  if (AH->lookaheadLen >= strlen(TEXT_DUMPALL_HEADER) &&
2160  (strncmp(AH->lookahead, TEXT_DUMP_HEADER, strlen(TEXT_DUMP_HEADER)) == 0 ||
2161  strncmp(AH->lookahead, TEXT_DUMPALL_HEADER, strlen(TEXT_DUMPALL_HEADER)) == 0))
2162  {
2163  /*
2164  * looks like it's probably a text format dump. so suggest they
2165  * try psql
2166  */
2167  fatal("input file appears to be a text format dump. Please use psql.");
2168  }
2169 
2170  if (AH->lookaheadLen != 512)
2171  {
2172  if (feof(fh))
2173  fatal("input file does not appear to be a valid archive (too short?)");
2174  else
2175  READ_ERROR_EXIT(fh);
2176  }
2177 
2178  if (!isValidTarHeader(AH->lookahead))
2179  fatal("input file does not appear to be a valid archive");
2180 
2181  AH->format = archTar;
2182  }
2183 
2184  /* Close the file if we opened it */
2185  if (wantClose)
2186  {
2187  if (fclose(fh) != 0)
2188  fatal("could not close input file: %m");
2189  /* Forget lookahead, since we'll re-read header after re-opening */
2190  AH->readHeader = 0;
2191  AH->lookaheadLen = 0;
2192  }
2193 
2194  return AH->format;
2195 }
2196 
2197 
2198 /*
2199  * Allocate an archive handle
2200  */
2201 static ArchiveHandle *
2202 _allocAH(const char *FileSpec, const ArchiveFormat fmt,
2203  const int compression, bool dosync, ArchiveMode mode,
2204  SetupWorkerPtrType setupWorkerPtr)
2205 {
2206  ArchiveHandle *AH;
2207 
2208  pg_log_debug("allocating AH for %s, format %d",
2209  FileSpec ? FileSpec : "(stdio)", fmt);
2210 
2211  AH = (ArchiveHandle *) pg_malloc0(sizeof(ArchiveHandle));
2212 
2213  AH->version = K_VERS_SELF;
2214 
2215  /* initialize for backwards compatible string processing */
2216  AH->public.encoding = 0; /* PG_SQL_ASCII */
2217  AH->public.std_strings = false;
2218 
2219  /* sql error handling */
2220  AH->public.exit_on_error = true;
2221  AH->public.n_errors = 0;
2222 
2223  AH->archiveDumpVersion = PG_VERSION;
2224 
2225  AH->createDate = time(NULL);
2226 
2227  AH->intSize = sizeof(int);
2228  AH->offSize = sizeof(pgoff_t);
2229  if (FileSpec)
2230  {
2231  AH->fSpec = pg_strdup(FileSpec);
2232 
2233  /*
2234  * Not used; maybe later....
2235  *
2236  * AH->workDir = pg_strdup(FileSpec); for(i=strlen(FileSpec) ; i > 0 ;
2237  * i--) if (AH->workDir[i-1] == '/')
2238  */
2239  }
2240  else
2241  AH->fSpec = NULL;
2242 
2243  AH->currUser = NULL; /* unknown */
2244  AH->currSchema = NULL; /* ditto */
2245  AH->currTablespace = NULL; /* ditto */
2246  AH->currTableAm = NULL; /* ditto */
2247 
2248  AH->toc = (TocEntry *) pg_malloc0(sizeof(TocEntry));
2249 
2250  AH->toc->next = AH->toc;
2251  AH->toc->prev = AH->toc;
2252 
2253  AH->mode = mode;
2254  AH->compression = compression;
2255  AH->dosync = dosync;
2256 
2257  memset(&(AH->sqlparse), 0, sizeof(AH->sqlparse));
2258 
2259  /* Open stdout with no compression for AH output handle */
2260  AH->gzOut = 0;
2261  AH->OF = stdout;
2262 
2263  /*
2264  * On Windows, we need to use binary mode to read/write non-text files,
2265  * which include all archive formats as well as compressed plain text.
2266  * Force stdin/stdout into binary mode if that is what we are using.
2267  */
2268 #ifdef WIN32
2269  if ((fmt != archNull || compression != 0) &&
2270  (AH->fSpec == NULL || strcmp(AH->fSpec, "") == 0))
2271  {
2272  if (mode == archModeWrite)
2273  _setmode(fileno(stdout), O_BINARY);
2274  else
2275  _setmode(fileno(stdin), O_BINARY);
2276  }
2277 #endif
2278 
2279  AH->SetupWorkerPtr = setupWorkerPtr;
2280 
2281  if (fmt == archUnknown)
2282  AH->format = _discoverArchiveFormat(AH);
2283  else
2284  AH->format = fmt;
2285 
2286  switch (AH->format)
2287  {
2288  case archCustom:
2289  InitArchiveFmt_Custom(AH);
2290  break;
2291 
2292  case archNull:
2293  InitArchiveFmt_Null(AH);
2294  break;
2295 
2296  case archDirectory:
2297  InitArchiveFmt_Directory(AH);
2298  break;
2299 
2300  case archTar:
2301  InitArchiveFmt_Tar(AH);
2302  break;
2303 
2304  default:
2305  fatal("unrecognized file format \"%d\"", fmt);
2306  }
2307 
2308  return AH;
2309 }
2310 
2311 /*
2312  * Write out all data (tables & blobs)
2313  */
2314 void
2315 WriteDataChunks(ArchiveHandle *AH, ParallelState *pstate)
2316 {
2317  TocEntry *te;
2318 
2319  if (pstate && pstate->numWorkers > 1)
2320  {
2321  /*
2322  * In parallel mode, this code runs in the leader process. We
2323  * construct an array of candidate TEs, then sort it into decreasing
2324  * size order, then dispatch each TE to a data-transfer worker. By
2325  * dumping larger tables first, we avoid getting into a situation
2326  * where we're down to one job and it's big, losing parallelism.
2327  */
2328  TocEntry **tes;
2329  int ntes;
2330 
2331  tes = (TocEntry **) pg_malloc(AH->tocCount * sizeof(TocEntry *));
2332  ntes = 0;
2333  for (te = AH->toc->next; te != AH->toc; te = te->next)
2334  {
2335  /* Consider only TEs with dataDumper functions ... */
2336  if (!te->dataDumper)
2337  continue;
2338  /* ... and ignore ones not enabled for dump */
2339  if ((te->reqs & REQ_DATA) == 0)
2340  continue;
2341 
2342  tes[ntes++] = te;
2343  }
2344 
2345  if (ntes > 1)
2346  qsort((void *) tes, ntes, sizeof(TocEntry *),
2347  TocEntrySizeCompare);
2348 
2349  for (int i = 0; i < ntes; i++)
2350  DispatchJobForTocEntry(AH, pstate, tes[i], ACT_DUMP,
2351  mark_dump_job_done, NULL);
2352 
2353  pg_free(tes);
2354 
2355  /* Now wait for workers to finish. */
2356  WaitForWorkers(AH, pstate, WFW_ALL_IDLE);
2357  }
2358  else
2359  {
2360  /* Non-parallel mode: just dump all candidate TEs sequentially. */
2361  for (te = AH->toc->next; te != AH->toc; te = te->next)
2362  {
2363  /* Must have same filter conditions as above */
2364  if (!te->dataDumper)
2365  continue;
2366  if ((te->reqs & REQ_DATA) == 0)
2367  continue;
2368 
2369  WriteDataChunksForTocEntry(AH, te);
2370  }
2371  }
2372 }
2373 
2374 
2375 /*
2376  * Callback function that's invoked in the leader process after a step has
2377  * been parallel dumped.
2378  *
2379  * We don't need to do anything except check for worker failure.
2380  */
2381 static void
2382 mark_dump_job_done(ArchiveHandle *AH,
2383  TocEntry *te,
2384  int status,
2385  void *callback_data)
2386 {
2387  pg_log_info("finished item %d %s %s",
2388  te->dumpId, te->desc, te->tag);
2389 
2390  if (status != 0)
2391  fatal("worker process failed: exit code %d",
2392  status);
2393 }
2394 
2395 
2396 void
2397 WriteDataChunksForTocEntry(ArchiveHandle *AH, TocEntry *te)
2398 {
2399  StartDataPtrType startPtr;
2400  EndDataPtrType endPtr;
2401 
2402  AH->currToc = te;
2403 
2404  if (strcmp(te->desc, "BLOBS") == 0)
2405  {
2406  startPtr = AH->StartBlobsPtr;
2407  endPtr = AH->EndBlobsPtr;
2408  }
2409  else
2410  {
2411  startPtr = AH->StartDataPtr;
2412  endPtr = AH->EndDataPtr;
2413  }
2414 
2415  if (startPtr != NULL)
2416  (*startPtr) (AH, te);
2417 
2418  /*
2419  * The user-provided DataDumper routine needs to call AH->WriteData
2420  */
2421  te->dataDumper((Archive *) AH, te->dataDumperArg);
2422 
2423  if (endPtr != NULL)
2424  (*endPtr) (AH, te);
2425 
2426  AH->currToc = NULL;
2427 }
2428 
2429 void
2430 WriteToc(ArchiveHandle *AH)
2431 {
2432  TocEntry *te;
2433  char workbuf[32];
2434  int tocCount;
2435  int i;
2436 
2437  /* count entries that will actually be dumped */
2438  tocCount = 0;
2439  for (te = AH->toc->next; te != AH->toc; te = te->next)
2440  {
2441  if ((te->reqs & (REQ_SCHEMA | REQ_DATA | REQ_SPECIAL)) != 0)
2442  tocCount++;
2443  }
2444 
2445  /* printf("%d TOC Entries to save\n", tocCount); */
2446 
2447  WriteInt(AH, tocCount);
2448 
2449  for (te = AH->toc->next; te != AH->toc; te = te->next)
2450  {
2451  if ((te->reqs & (REQ_SCHEMA | REQ_DATA | REQ_SPECIAL)) == 0)
2452  continue;
2453 
2454  WriteInt(AH, te->dumpId);
2455  WriteInt(AH, te->dataDumper ? 1 : 0);
2456 
2457  /* OID is recorded as a string for historical reasons */
2458  sprintf(workbuf, "%u", te->catalogId.tableoid);
2459  WriteStr(AH, workbuf);
2460  sprintf(workbuf, "%u", te->catalogId.oid);
2461  WriteStr(AH, workbuf);
2462 
2463  WriteStr(AH, te->tag);
2464  WriteStr(AH, te->desc);
2465  WriteInt(AH, te->section);
2466  WriteStr(AH, te->defn);
2467  WriteStr(AH, te->dropStmt);
2468  WriteStr(AH, te->copyStmt);
2469  WriteStr(AH, te->namespace);
2470  WriteStr(AH, te->tablespace);
2471  WriteStr(AH, te->tableam);
2472  WriteStr(AH, te->owner);
2473  WriteStr(AH, "false");
2474 
2475  /* Dump list of dependencies */
2476  for (i = 0; i < te->nDeps; i++)
2477  {
2478  sprintf(workbuf, "%d", te->dependencies[i]);
2479  WriteStr(AH, workbuf);
2480  }
2481  WriteStr(AH, NULL); /* Terminate List */
2482 
2483  if (AH->WriteExtraTocPtr)
2484  AH->WriteExtraTocPtr(AH, te);
2485  }
2486 }
2487 
2488 void
2489 ReadToc(ArchiveHandle *AH)
2490 {
2491  int i;
2492  char *tmp;
2493  DumpId *deps;
2494  int depIdx;
2495  int depSize;
2496  TocEntry *te;
2497 
2498  AH->tocCount = ReadInt(AH);
2499  AH->maxDumpId = 0;
2500 
2501  for (i = 0; i < AH->tocCount; i++)
2502  {
2503  te = (TocEntry *) pg_malloc0(sizeof(TocEntry));
2504  te->dumpId = ReadInt(AH);
2505 
2506  if (te->dumpId > AH->maxDumpId)
2507  AH->maxDumpId = te->dumpId;
2508 
2509  /* Sanity check */
2510  if (te->dumpId <= 0)
2511  fatal("entry ID %d out of range -- perhaps a corrupt TOC",
2512  te->dumpId);
2513 
2514  te->hadDumper = ReadInt(AH);
2515 
2516  if (AH->version >= K_VERS_1_8)
2517  {
2518  tmp = ReadStr(AH);
2519  sscanf(tmp, "%u", &te->catalogId.tableoid);
2520  free(tmp);
2521  }
2522  else
2523  te->catalogId.tableoid = InvalidOid;
2524  tmp = ReadStr(AH);
2525  sscanf(tmp, "%u", &te->catalogId.oid);
2526  free(tmp);
2527 
2528  te->tag = ReadStr(AH);
2529  te->desc = ReadStr(AH);
2530 
2531  if (AH->version >= K_VERS_1_11)
2532  {
2533  te->section = ReadInt(AH);
2534  }
2535  else
2536  {
2537  /*
2538  * Rules for pre-8.4 archives wherein pg_dump hasn't classified
2539  * the entries into sections. This list need not cover entry
2540  * types added later than 8.4.
2541  */
2542  if (strcmp(te->desc, "COMMENT") == 0 ||
2543  strcmp(te->desc, "ACL") == 0 ||
2544  strcmp(te->desc, "ACL LANGUAGE") == 0)
2545  te->section = SECTION_NONE;
2546  else if (strcmp(te->desc, "TABLE DATA") == 0 ||
2547  strcmp(te->desc, "BLOBS") == 0 ||
2548  strcmp(te->desc, "BLOB COMMENTS") == 0)
2549  te->section = SECTION_DATA;
2550  else if (strcmp(te->desc, "CONSTRAINT") == 0 ||
2551  strcmp(te->desc, "CHECK CONSTRAINT") == 0 ||
2552  strcmp(te->desc, "FK CONSTRAINT") == 0 ||
2553  strcmp(te->desc, "INDEX") == 0 ||
2554  strcmp(te->desc, "RULE") == 0 ||
2555  strcmp(te->desc, "TRIGGER") == 0)
2556  te->section = SECTION_POST_DATA;
2557  else
2558  te->section = SECTION_PRE_DATA;
2559  }
2560 
2561  te->defn = ReadStr(AH);
2562  te->dropStmt = ReadStr(AH);
2563 
2564  if (AH->version >= K_VERS_1_3)
2565  te->copyStmt = ReadStr(AH);
2566 
2567  if (AH->version >= K_VERS_1_6)
2568  te->namespace = ReadStr(AH);
2569 
2570  if (AH->version >= K_VERS_1_10)
2571  te->tablespace = ReadStr(AH);
2572 
2573  if (AH->version >= K_VERS_1_14)
2574  te->tableam = ReadStr(AH);
2575 
2576  te->owner = ReadStr(AH);
2577  if (AH->version < K_VERS_1_9 || strcmp(ReadStr(AH), "true") == 0)
2578  pg_log_warning("restoring tables WITH OIDS is not supported anymore");
2579 
2580  /* Read TOC entry dependencies */
2581  if (AH->version >= K_VERS_1_5)
2582  {
2583  depSize = 100;
2584  deps = (DumpId *) pg_malloc(sizeof(DumpId) * depSize);
2585  depIdx = 0;
2586  for (;;)
2587  {
2588  tmp = ReadStr(AH);
2589  if (!tmp)
2590  break; /* end of list */
2591  if (depIdx >= depSize)
2592  {
2593  depSize *= 2;
2594  deps = (DumpId *) pg_realloc(deps, sizeof(DumpId) * depSize);
2595  }
2596  sscanf(tmp, "%d", &deps[depIdx]);
2597  free(tmp);
2598  depIdx++;
2599  }
2600 
2601  if (depIdx > 0) /* We have a non-null entry */
2602  {
2603  deps = (DumpId *) pg_realloc(deps, sizeof(DumpId) * depIdx);
2604  te->dependencies = deps;
2605  te->nDeps = depIdx;
2606  }
2607  else
2608  {
2609  free(deps);
2610  te->dependencies = NULL;
2611  te->nDeps = 0;
2612  }
2613  }
2614  else
2615  {
2616  te->dependencies = NULL;
2617  te->nDeps = 0;
2618  }
2619  te->dataLength = 0;
2620 
2621  if (AH->ReadExtraTocPtr)
2622  AH->ReadExtraTocPtr(AH, te);
2623 
2624  pg_log_debug("read TOC entry %d (ID %d) for %s %s",
2625  i, te->dumpId, te->desc, te->tag);
2626 
2627  /* link completed entry into TOC circular list */
2628  te->prev = AH->toc->prev;
2629  AH->toc->prev->next = te;
2630  AH->toc->prev = te;
2631  te->next = AH->toc;
2632 
2633  /* special processing immediately upon read for some items */
2634  if (strcmp(te->desc, "ENCODING") == 0)
2635  processEncodingEntry(AH, te);
2636  else if (strcmp(te->desc, "STDSTRINGS") == 0)
2637  processStdStringsEntry(AH, te);
2638  else if (strcmp(te->desc, "SEARCHPATH") == 0)
2639  processSearchPathEntry(AH, te);
2640  }
2641 }
2642 
2643 static void
2644 processEncodingEntry(ArchiveHandle *AH, TocEntry *te)
2645 {
2646  /* te->defn should have the form SET client_encoding = 'foo'; */
2647  char *defn = pg_strdup(te->defn);
2648  char *ptr1;
2649  char *ptr2 = NULL;
2650  int encoding;
2651 
2652  ptr1 = strchr(defn, '\'');
2653  if (ptr1)
2654  ptr2 = strchr(++ptr1, '\'');
2655  if (ptr2)
2656  {
2657  *ptr2 = '\0';
2658  encoding = pg_char_to_encoding(ptr1);
2659  if (encoding < 0)
2660  fatal("unrecognized encoding \"%s\"",
2661  ptr1);
2662  AH->public.encoding = encoding;
2663  }
2664  else
2665  fatal("invalid ENCODING item: %s",
2666  te->defn);
2667 
2668  free(defn);
2669 }
2670 
2671 static void
2672 processStdStringsEntry(ArchiveHandle *AH, TocEntry *te)
2673 {
2674  /* te->defn should have the form SET standard_conforming_strings = 'x'; */
2675  char *ptr1;
2676 
2677  ptr1 = strchr(te->defn, '\'');
2678  if (ptr1 && strncmp(ptr1, "'on'", 4) == 0)
2679  AH->public.std_strings = true;
2680  else if (ptr1 && strncmp(ptr1, "'off'", 5) == 0)
2681  AH->public.std_strings = false;
2682  else
2683  fatal("invalid STDSTRINGS item: %s",
2684  te->defn);
2685 }
2686 
2687 static void
2688 processSearchPathEntry(ArchiveHandle *AH, TocEntry *te)
2689 {
2690  /*
2691  * te->defn should contain a command to set search_path. We just copy it
2692  * verbatim for use later.
2693  */
2694  AH->public.searchpath = pg_strdup(te->defn);
2695 }
2696 
2697 static void
2698 StrictNamesCheck(RestoreOptions *ropt)
2699 {
2700  const char *missing_name;
2701 
2702  Assert(ropt->strict_names);
2703 
2704  if (ropt->schemaNames.head != NULL)
2705  {
2706  missing_name = simple_string_list_not_touched(&ropt->schemaNames);
2707  if (missing_name != NULL)
2708  fatal("schema \"%s\" not found", missing_name);
2709  }
2710 
2711  if (ropt->tableNames.head != NULL)
2712  {
2713  missing_name = simple_string_list_not_touched(&ropt->tableNames);
2714  if (missing_name != NULL)
2715  fatal("table \"%s\" not found", missing_name);
2716  }
2717 
2718  if (ropt->indexNames.head != NULL)
2719  {
2720  missing_name = simple_string_list_not_touched(&ropt->indexNames);
2721  if (missing_name != NULL)
2722  fatal("index \"%s\" not found", missing_name);
2723  }
2724 
2725  if (ropt->functionNames.head != NULL)
2726  {
2727  missing_name = simple_string_list_not_touched(&ropt->functionNames);
2728  if (missing_name != NULL)
2729  fatal("function \"%s\" not found", missing_name);
2730  }
2731 
2732  if (ropt->triggerNames.head != NULL)
2733  {
2734  missing_name = simple_string_list_not_touched(&ropt->triggerNames);
2735  if (missing_name != NULL)
2736  fatal("trigger \"%s\" not found", missing_name);
2737  }
2738 }
2739 
2740 /*
2741  * Determine whether we want to restore this TOC entry.
2742  *
2743  * Returns 0 if entry should be skipped, or some combination of the
2744  * REQ_SCHEMA and REQ_DATA bits if we want to restore schema and/or data
2745  * portions of this TOC entry, or REQ_SPECIAL if it's a special entry.
2746  */
2747 static int
2748 _tocEntryRequired(TocEntry *te, teSection curSection, ArchiveHandle *AH)
2749 {
2750  int res = REQ_SCHEMA | REQ_DATA;
2751  RestoreOptions *ropt = AH->public.ropt;
2752 
2753  /* These items are treated specially */
2754  if (strcmp(te->desc, "ENCODING") == 0 ||
2755  strcmp(te->desc, "STDSTRINGS") == 0 ||
2756  strcmp(te->desc, "SEARCHPATH") == 0)
2757  return REQ_SPECIAL;
2758 
2759  /*
2760  * DATABASE and DATABASE PROPERTIES also have a special rule: they are
2761  * restored in createDB mode, and not restored otherwise, independently of
2762  * all else.
2763  */
2764  if (strcmp(te->desc, "DATABASE") == 0 ||
2765  strcmp(te->desc, "DATABASE PROPERTIES") == 0)
2766  {
2767  if (ropt->createDB)
2768  return REQ_SCHEMA;
2769  else
2770  return 0;
2771  }
2772 
2773  /*
2774  * Process exclusions that affect certain classes of TOC entries.
2775  */
2776 
2777  /* If it's an ACL, maybe ignore it */
2778  if (ropt->aclsSkip && _tocEntryIsACL(te))
2779  return 0;
2780 
2781  /* If it's a comment, maybe ignore it */
2782  if (ropt->no_comments && strcmp(te->desc, "COMMENT") == 0)
2783  return 0;
2784 
2785  /*
2786  * If it's a publication or a table part of a publication, maybe ignore
2787  * it.
2788  */
2789  if (ropt->no_publications &&
2790  (strcmp(te->desc, "PUBLICATION") == 0 ||
2791  strcmp(te->desc, "PUBLICATION TABLE") == 0))
2792  return 0;
2793 
2794  /* If it's a security label, maybe ignore it */
2795  if (ropt->no_security_labels && strcmp(te->desc, "SECURITY LABEL") == 0)
2796  return 0;
2797 
2798  /* If it's a subscription, maybe ignore it */
2799  if (ropt->no_subscriptions && strcmp(te->desc, "SUBSCRIPTION") == 0)
2800  return 0;
2801 
2802  /* Ignore it if section is not to be dumped/restored */
2803  switch (curSection)
2804  {
2805  case SECTION_PRE_DATA:
2806  if (!(ropt->dumpSections & DUMP_PRE_DATA))
2807  return 0;
2808  break;
2809  case SECTION_DATA:
2810  if (!(ropt->dumpSections & DUMP_DATA))
2811  return 0;
2812  break;
2813  case SECTION_POST_DATA:
2814  if (!(ropt->dumpSections & DUMP_POST_DATA))
2815  return 0;
2816  break;
2817  default:
2818  /* shouldn't get here, really, but ignore it */
2819  return 0;
2820  }
2821 
2822  /* Ignore it if rejected by idWanted[] (cf. SortTocFromFile) */
2823  if (ropt->idWanted && !ropt->idWanted[te->dumpId - 1])
2824  return 0;
2825 
2826  /*
2827  * Check options for selective dump/restore.
2828  */
2829  if (strcmp(te->desc, "ACL") == 0 ||
2830  strcmp(te->desc, "COMMENT") == 0 ||
2831  strcmp(te->desc, "SECURITY LABEL") == 0)
2832  {
2833  /* Database properties react to createDB, not selectivity options. */
2834  if (strncmp(te->tag, "DATABASE ", 9) == 0)
2835  {
2836  if (!ropt->createDB)
2837  return 0;
2838  }
2839  else if (ropt->schemaNames.head != NULL ||
2840  ropt->schemaExcludeNames.head != NULL ||
2841  ropt->selTypes)
2842  {
2843  /*
2844  * In a selective dump/restore, we want to restore these dependent
2845  * TOC entry types only if their parent object is being restored.
2846  * Without selectivity options, we let through everything in the
2847  * archive. Note there may be such entries with no parent, eg
2848  * non-default ACLs for built-in objects.
2849  *
2850  * This code depends on the parent having been marked already,
2851  * which should be the case; if it isn't, perhaps due to
2852  * SortTocFromFile rearrangement, skipping the dependent entry
2853  * seems prudent anyway.
2854  *
2855  * Ideally we'd handle, eg, table CHECK constraints this way too.
2856  * But it's hard to tell which of their dependencies is the one to
2857  * consult.
2858  */
2859  if (te->nDeps != 1 ||
2860  TocIDRequired(AH, te->dependencies[0]) == 0)
2861  return 0;
2862  }
2863  }
2864  else
2865  {
2866  /* Apply selective-restore rules for standalone TOC entries. */
2867  if (ropt->schemaNames.head != NULL)
2868  {
2869  /* If no namespace is specified, it means all. */
2870  if (!te->namespace)
2871  return 0;
2872  if (!simple_string_list_member(&ropt->schemaNames, te->namespace))
2873  return 0;
2874  }
2875 
2876  if (ropt->schemaExcludeNames.head != NULL &&
2877  te->namespace &&
2878  simple_string_list_member(&ropt->schemaExcludeNames, te->namespace))
2879  return 0;
2880 
2881  if (ropt->selTypes)
2882  {
2883  if (strcmp(te->desc, "TABLE") == 0 ||
2884  strcmp(te->desc, "TABLE DATA") == 0 ||
2885  strcmp(te->desc, "VIEW") == 0 ||
2886  strcmp(te->desc, "FOREIGN TABLE") == 0 ||
2887  strcmp(te->desc, "MATERIALIZED VIEW") == 0 ||
2888  strcmp(te->desc, "MATERIALIZED VIEW DATA") == 0 ||
2889  strcmp(te->desc, "SEQUENCE") == 0 ||
2890  strcmp(te->desc, "SEQUENCE SET") == 0)
2891  {
2892  if (!ropt->selTable)
2893  return 0;
2894  if (ropt->tableNames.head != NULL &&
2895  !simple_string_list_member(&ropt->tableNames, te->tag))
2896  return 0;
2897  }
2898  else if (strcmp(te->desc, "INDEX") == 0)
2899  {
2900  if (!ropt->selIndex)
2901  return 0;
2902  if (ropt->indexNames.head != NULL &&
2903  !simple_string_list_member(&ropt->indexNames, te->tag))
2904  return 0;
2905  }
2906  else if (strcmp(te->desc, "FUNCTION") == 0 ||
2907  strcmp(te->desc, "AGGREGATE") == 0 ||
2908  strcmp(te->desc, "PROCEDURE") == 0)
2909  {
2910  if (!ropt->selFunction)
2911  return 0;
2912  if (ropt->functionNames.head != NULL &&
2913  !simple_string_list_member(&ropt->functionNames, te->tag))
2914  return 0;
2915  }
2916  else if (strcmp(te->desc, "TRIGGER") == 0)
2917  {
2918  if (!ropt->selTrigger)
2919  return 0;
2920  if (ropt->triggerNames.head != NULL &&
2921  !simple_string_list_member(&ropt->triggerNames, te->tag))
2922  return 0;
2923  }
2924  else
2925  return 0;
2926  }
2927  }
2928 
2929  /*
2930  * Determine whether the TOC entry contains schema and/or data components,
2931  * and mask off inapplicable REQ bits. If it had a dataDumper, assume
2932  * it's both schema and data. Otherwise it's probably schema-only, but
2933  * there are exceptions.
2934  */
2935  if (!te->hadDumper)
2936  {
2937  /*
2938  * Special Case: If 'SEQUENCE SET' or anything to do with BLOBs, then
2939  * it is considered a data entry. We don't need to check for the
2940  * BLOBS entry or old-style BLOB COMMENTS, because they will have
2941  * hadDumper = true ... but we do need to check new-style BLOB ACLs,
2942  * comments, etc.
2943  */
2944  if (strcmp(te->desc, "SEQUENCE SET") == 0 ||
2945  strcmp(te->desc, "BLOB") == 0 ||
2946  (strcmp(te->desc, "ACL") == 0 &&
2947  strncmp(te->tag, "LARGE OBJECT ", 13) == 0) ||
2948  (strcmp(te->desc, "COMMENT") == 0 &&
2949  strncmp(te->tag, "LARGE OBJECT ", 13) == 0) ||
2950  (strcmp(te->desc, "SECURITY LABEL") == 0 &&
2951  strncmp(te->tag, "LARGE OBJECT ", 13) == 0))
2952  res = res & REQ_DATA;
2953  else
2954  res = res & ~REQ_DATA;
2955  }
2956 
2957  /* If there's no definition command, there's no schema component */
2958  if (!te->defn || !te->defn[0])
2959  res = res & ~REQ_SCHEMA;
2960 
2961  /*
2962  * Special case: <Init> type with <Max OID> tag; this is obsolete and we
2963  * always ignore it.
2964  */
2965  if ((strcmp(te->desc, "<Init>") == 0) && (strcmp(te->tag, "Max OID") == 0))
2966  return 0;
2967 
2968  /* Mask it if we only want schema */
2969  if (ropt->schemaOnly)
2970  {
2971  /*
2972  * The sequence_data option overrides schemaOnly for SEQUENCE SET.
2973  *
2974  * In binary-upgrade mode, even with schemaOnly set, we do not mask
2975  * out large objects. (Only large object definitions, comments and
2976  * other metadata should be generated in binary-upgrade mode, not the
2977  * actual data, but that need not concern us here.)
2978  */
2979  if (!(ropt->sequence_data && strcmp(te->desc, "SEQUENCE SET") == 0) &&
2980  !(ropt->binary_upgrade &&
2981  (strcmp(te->desc, "BLOB") == 0 ||
2982  (strcmp(te->desc, "ACL") == 0 &&
2983  strncmp(te->tag, "LARGE OBJECT ", 13) == 0) ||
2984  (strcmp(te->desc, "COMMENT") == 0 &&
2985  strncmp(te->tag, "LARGE OBJECT ", 13) == 0) ||
2986  (strcmp(te->desc, "SECURITY LABEL") == 0 &&
2987  strncmp(te->tag, "LARGE OBJECT ", 13) == 0))))
2988  res = res & REQ_SCHEMA;
2989  }
2990 
2991  /* Mask it if we only want data */
2992  if (ropt->dataOnly)
2993  res = res & REQ_DATA;
2994 
2995  return res;
2996 }
2997 
2998 /*
2999  * Identify which pass we should restore this TOC entry in.
3000  *
3001  * See notes with the RestorePass typedef in pg_backup_archiver.h.
3002  */
3003 static RestorePass
3004 _tocEntryRestorePass(TocEntry *te)
3005 {
3006  /* "ACL LANGUAGE" was a crock emitted only in PG 7.4 */
3007  if (strcmp(te->desc, "ACL") == 0 ||
3008  strcmp(te->desc, "ACL LANGUAGE") == 0 ||
3009  strcmp(te->desc, "DEFAULT ACL") == 0)
3010  return RESTORE_PASS_ACL;
3011  if (strcmp(te->desc, "EVENT TRIGGER") == 0 ||
3012  strcmp(te->desc, "MATERIALIZED VIEW DATA") == 0)
3013  return RESTORE_PASS_POST_ACL;
3014 
3015  /*
3016  * Comments need to be emitted in the same pass as their parent objects.
3017  * ACLs haven't got comments, and neither do matview data objects, but
3018  * event triggers do. (Fortunately, event triggers haven't got ACLs, or
3019  * we'd need yet another weird special case.)
3020  */
3021  if (strcmp(te->desc, "COMMENT") == 0 &&
3022  strncmp(te->tag, "EVENT TRIGGER ", 14) == 0)
3023  return RESTORE_PASS_POST_ACL;
3024 
3025  /* All else can be handled in the main pass. */
3026  return RESTORE_PASS_MAIN;
3027 }
3028 
3029 /*
3030  * Identify TOC entries that are ACLs.
3031  *
3032  * Note: it seems worth duplicating some code here to avoid a hard-wired
3033  * assumption that these are exactly the same entries that we restore during
3034  * the RESTORE_PASS_ACL phase.
3035  */
3036 static bool
3037 _tocEntryIsACL(TocEntry *te)
3038 {
3039  /* "ACL LANGUAGE" was a crock emitted only in PG 7.4 */
3040  if (strcmp(te->desc, "ACL") == 0 ||
3041  strcmp(te->desc, "ACL LANGUAGE") == 0 ||
3042  strcmp(te->desc, "DEFAULT ACL") == 0)
3043  return true;
3044  return false;
3045 }
3046 
3047 /*
3048  * Issue SET commands for parameters that we want to have set the same way
3049  * at all times during execution of a restore script.
3050  */
3051 static void
3052 _doSetFixedOutputState(ArchiveHandle *AH)
3053 {
3054  RestoreOptions *ropt = AH->public.ropt;
3055 
3056  /*
3057  * Disable timeouts to allow for slow commands, idle parallel workers, etc
3058  */
3059  ahprintf(AH, "SET statement_timeout = 0;\n");
3060  ahprintf(AH, "SET lock_timeout = 0;\n");
3061  ahprintf(AH, "SET idle_in_transaction_session_timeout = 0;\n");
3062 
3063  /* Select the correct character set encoding */
3064  ahprintf(AH, "SET client_encoding = '%s';\n",
3065  pg_encoding_to_char(AH->public.encoding));
3066 
3067  /* Select the correct string literal syntax */
3068  ahprintf(AH, "SET standard_conforming_strings = %s;\n",
3069  AH->public.std_strings ? "on" : "off");
3070 
3071  /* Select the role to be used during restore */
3072  if (ropt && ropt->use_role)
3073  ahprintf(AH, "SET ROLE %s;\n", fmtId(ropt->use_role));
3074 
3075  /* Select the dump-time search_path */
3076  if (AH->public.searchpath)
3077  ahprintf(AH, "%s", AH->public.searchpath);
3078 
3079  /* Make sure function checking is disabled */
3080  ahprintf(AH, "SET check_function_bodies = false;\n");
3081 
3082  /* Ensure that all valid XML data will be accepted */
3083  ahprintf(AH, "SET xmloption = content;\n");
3084 
3085  /* Avoid annoying notices etc */
3086  ahprintf(AH, "SET client_min_messages = warning;\n");
3087  if (!AH->public.std_strings)
3088  ahprintf(AH, "SET escape_string_warning = off;\n");
3089 
3090  /* Adjust row-security state */
3091  if (ropt && ropt->enable_row_security)
3092  ahprintf(AH, "SET row_security = on;\n");
3093  else
3094  ahprintf(AH, "SET row_security = off;\n");
3095 
3096  ahprintf(AH, "\n");
3097 }
3098 
3099 /*
3100  * Issue a SET SESSION AUTHORIZATION command. Caller is responsible
3101  * for updating state if appropriate. If user is NULL or an empty string,
3102  * the specification DEFAULT will be used.
3103  */
3104 static void
3105 _doSetSessionAuth(ArchiveHandle *AH, const char *user)
3106 {
3107  PQExpBuffer cmd = createPQExpBuffer();
3108 
3109  appendPQExpBufferStr(cmd, "SET SESSION AUTHORIZATION ");
3110 
3111  /*
3112  * SQL requires a string literal here. Might as well be correct.
3113  */
3114  if (user && *user)
3115  appendStringLiteralAHX(cmd, user, AH);
3116  else
3117  appendPQExpBufferStr(cmd, "DEFAULT");
3118  appendPQExpBufferChar(cmd, ';');
3119 
3120  if (RestoringToDB(AH))
3121  {
3122  PGresult *res;
3123 
3124  res = PQexec(AH->connection, cmd->data);
3125 
3126  if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
3127  /* NOT warn_or_exit_horribly... use -O instead to skip this. */
3128  fatal("could not set session user to \"%s\": %s",
3129  user, PQerrorMessage(AH->connection));
3130 
3131  PQclear(res);
3132  }
3133  else
3134  ahprintf(AH, "%s\n\n", cmd->data);
3135 
3136  destroyPQExpBuffer(cmd);
3137 }
3138 
3139 
3140 /*
3141  * Issue the commands to connect to the specified database.
3142  *
3143  * If we're currently restoring right into a database, this will
3144  * actually establish a connection. Otherwise it puts a \connect into
3145  * the script output.
3146  */
3147 static void
3148 _reconnectToDB(ArchiveHandle *AH, const char *dbname)
3149 {
3150  if (RestoringToDB(AH))
3151  ReconnectToServer(AH, dbname);
3152  else
3153  {
3154  PQExpBufferData connectbuf;
3155 
3156  initPQExpBuffer(&connectbuf);
3157  appendPsqlMetaConnect(&connectbuf, dbname);
3158  ahprintf(AH, "%s\n", connectbuf.data);
3159  termPQExpBuffer(&connectbuf);
3160  }
3161 
3162  /*
3163  * NOTE: currUser keeps track of what the imaginary session user in our
3164  * script is. It's now effectively reset to the original userID.
3165  */
3166  if (AH->currUser)
3167  free(AH->currUser);
3168  AH->currUser = NULL;
3169 
3170  /* don't assume we still know the output schema, tablespace, etc either */
3171  if (AH->currSchema)
3172  free(AH->currSchema);
3173  AH->currSchema = NULL;
3174  if (AH->currTablespace)
3175  free(AH->currTablespace);
3176  AH->currTablespace = NULL;
3177 
3178  /* re-establish fixed state */
3179  _doSetFixedOutputState(AH);
3180 }
3181 
3182 /*
3183  * Become the specified user, and update state to avoid redundant commands
3184  *
3185  * NULL or empty argument is taken to mean restoring the session default
3186  */
3187 static void
3188 _becomeUser(ArchiveHandle *AH, const char *user)
3189 {
3190  if (!user)
3191  user = ""; /* avoid null pointers */
3192 
3193  if (AH->currUser && strcmp(AH->currUser, user) == 0)
3194  return; /* no need to do anything */
3195 
3196  _doSetSessionAuth(AH, user);
3197 
3198  /*
3199  * NOTE: currUser keeps track of what the imaginary session user in our
3200  * script is
3201  */
3202  if (AH->currUser)
3203  free(AH->currUser);
3204  AH->currUser = pg_strdup(user);
3205 }
3206 
3207 /*
3208  * Become the owner of the given TOC entry object. If
3209  * changes in ownership are not allowed, this doesn't do anything.
3210  */
3211 static void
3212 _becomeOwner(ArchiveHandle *AH, TocEntry *te)
3213 {
3214  RestoreOptions *ropt = AH->public.ropt;
3215 
3216  if (ropt && (ropt->noOwner || !ropt->use_setsessauth))
3217  return;
3218 
3219  _becomeUser(AH, te->owner);
3220 }
3221 
3222 
3223 /*
3224  * Issue the commands to select the specified schema as the current schema
3225  * in the target database.
3226  */
3227 static void
3228 _selectOutputSchema(ArchiveHandle *AH, const char *schemaName)
3229 {
3230  PQExpBuffer qry;
3231 
3232  /*
3233  * If there was a SEARCHPATH TOC entry, we're supposed to just stay with
3234  * that search_path rather than switching to entry-specific paths.
3235  * Otherwise, it's an old archive that will not restore correctly unless
3236  * we set the search_path as it's expecting.
3237  */
3238  if (AH->public.searchpath)
3239  return;
3240 
3241  if (!schemaName || *schemaName == '\0' ||
3242  (AH->currSchema && strcmp(AH->currSchema, schemaName) == 0))
3243  return; /* no need to do anything */
3244 
3245  qry = createPQExpBuffer();
3246 
3247  appendPQExpBuffer(qry, "SET search_path = %s",
3248  fmtId(schemaName));
3249  if (strcmp(schemaName, "pg_catalog") != 0)
3250  appendPQExpBufferStr(qry, ", pg_catalog");
3251 
3252  if (RestoringToDB(AH))
3253  {
3254  PGresult *res;
3255 
3256  res = PQexec(AH->connection, qry->data);
3257 
3258  if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
3259  warn_or_exit_horribly(AH,
3260  "could not set search_path to \"%s\": %s",
3261  schemaName, PQerrorMessage(AH->connection));
3262 
3263  PQclear(res);
3264  }
3265  else
3266  ahprintf(AH, "%s;\n\n", qry->data);
3267 
3268  if (AH->currSchema)
3269  free(AH->currSchema);
3270  AH->currSchema = pg_strdup(schemaName);
3271 
3272  destroyPQExpBuffer(qry);
3273 }
3274 
3275 /*
3276  * Issue the commands to select the specified tablespace as the current one
3277  * in the target database.
3278  */
3279 static void
3280 _selectTablespace(ArchiveHandle *AH, const char *tablespace)
3281 {
3282  RestoreOptions *ropt = AH->public.ropt;
3283  PQExpBuffer qry;
3284  const char *want,
3285  *have;
3286 
3287  /* do nothing in --no-tablespaces mode */
3288  if (ropt->noTablespace)
3289  return;
3290 
3291  have = AH->currTablespace;
3292  want = tablespace;
3293 
3294  /* no need to do anything for non-tablespace object */
3295  if (!want)
3296  return;
3297 
3298  if (have && strcmp(want, have) == 0)
3299  return; /* no need to do anything */
3300 
3301  qry = createPQExpBuffer();
3302 
3303  if (strcmp(want, "") == 0)
3304  {
3305  /* We want the tablespace to be the database's default */
3306  appendPQExpBufferStr(qry, "SET default_tablespace = ''");
3307  }
3308  else
3309  {
3310  /* We want an explicit tablespace */
3311  appendPQExpBuffer(qry, "SET default_tablespace = %s", fmtId(want));
3312  }
3313 
3314  if (RestoringToDB(AH))
3315  {
3316  PGresult *res;
3317 
3318  res = PQexec(AH->connection, qry->data);
3319 
3320  if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
3321  warn_or_exit_horribly(AH,
3322  "could not set default_tablespace to %s: %s",
3323  fmtId(want), PQerrorMessage(AH->connection));
3324 
3325  PQclear(res);
3326  }
3327  else
3328  ahprintf(AH, "%s;\n\n", qry->data);
3329 
3330  if (AH->currTablespace)
3331  free(AH->currTablespace);
3332  AH->currTablespace = pg_strdup(want);
3333 
3334  destroyPQExpBuffer(qry);
3335 }
3336 
3337 /*
3338  * Set the proper default_table_access_method value for the table.
3339  */
3340 static void
3341 _selectTableAccessMethod(ArchiveHandle *AH, const char *tableam)
3342 {
3343  PQExpBuffer cmd;
3344  const char *want,
3345  *have;
3346 
3347  have = AH->currTableAm;
3348  want = tableam;
3349 
3350  if (!want)
3351  return;
3352 
3353  if (have && strcmp(want, have) == 0)
3354  return;
3355 
3356  cmd = createPQExpBuffer();
3357  appendPQExpBuffer(cmd, "SET default_table_access_method = %s;", fmtId(want));
3358 
3359  if (RestoringToDB(AH))
3360  {
3361  PGresult *res;
3362 
3363  res = PQexec(AH->connection, cmd->data);
3364 
3365  if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
3366  warn_or_exit_horribly(AH,
3367  "could not set default_table_access_method: %s",
3368  PQerrorMessage(AH->connection));
3369 
3370  PQclear(res);
3371  }
3372  else
3373  ahprintf(AH, "%s\n\n", cmd->data);
3374 
3375  destroyPQExpBuffer(cmd);
3376 
3377  AH->currTableAm = pg_strdup(want);
3378 }
3379 
3380 /*
3381  * Extract an object description for a TOC entry, and append it to buf.
3382  *
3383  * This is used for ALTER ... OWNER TO.
3384  */
3385 static void
3386 _getObjectDescription(PQExpBuffer buf, TocEntry *te)
3387 {
3388  const char *type = te->desc;
3389 
3390  /* Use ALTER TABLE for views and sequences */
3391  if (strcmp(type, "VIEW") == 0 || strcmp(type, "SEQUENCE") == 0 ||
3392  strcmp(type, "MATERIALIZED VIEW") == 0)
3393  type = "TABLE";
3394 
3395  /* objects that don't require special decoration */
3396  if (strcmp(type, "COLLATION") == 0 ||
3397  strcmp(type, "CONVERSION") == 0 ||
3398  strcmp(type, "DOMAIN") == 0 ||
3399  strcmp(type, "TABLE") == 0 ||
3400  strcmp(type, "TYPE") == 0 ||
3401  strcmp(type, "FOREIGN TABLE") == 0 ||
3402  strcmp(type, "TEXT SEARCH DICTIONARY") == 0 ||
3403  strcmp(type, "TEXT SEARCH CONFIGURATION") == 0 ||
3404  strcmp(type, "STATISTICS") == 0 ||
3405  /* non-schema-specified objects */
3406  strcmp(type, "DATABASE") == 0 ||
3407  strcmp(type, "PROCEDURAL LANGUAGE") == 0 ||
3408  strcmp(type, "SCHEMA") == 0 ||
3409  strcmp(type, "EVENT TRIGGER") == 0 ||
3410  strcmp(type, "FOREIGN DATA WRAPPER") == 0 ||
3411  strcmp(type, "SERVER") == 0 ||
3412  strcmp(type, "PUBLICATION") == 0 ||
3413  strcmp(type, "SUBSCRIPTION") == 0 ||
3414  strcmp(type, "USER MAPPING") == 0)
3415  {
3416  appendPQExpBuffer(buf, "%s ", type);
3417  if (te->namespace && *te->namespace)
3418  appendPQExpBuffer(buf, "%s.", fmtId(te->namespace));
3419  appendPQExpBufferStr(buf, fmtId(te->tag));
3420  return;
3421  }
3422 
3423  /* BLOBs just have a name, but it's numeric so must not use fmtId */
3424  if (strcmp(type, "BLOB") == 0)
3425  {
3426  appendPQExpBuffer(buf, "LARGE OBJECT %s", te->tag);
3427  return;
3428  }
3429 
3430  /*
3431  * These object types require additional decoration. Fortunately, the
3432  * information needed is exactly what's in the DROP command.
3433  */
3434  if (strcmp(type, "AGGREGATE") == 0 ||
3435  strcmp(type, "FUNCTION") == 0 ||
3436  strcmp(type, "OPERATOR") == 0 ||
3437  strcmp(type, "OPERATOR CLASS") == 0 ||
3438  strcmp(type, "OPERATOR FAMILY") == 0 ||
3439  strcmp(type, "PROCEDURE") == 0)
3440  {
3441  /* Chop "DROP " off the front and make a modifiable copy */
3442  char *first = pg_strdup(te->dropStmt + 5);
3443  char *last;
3444 
3445  /* point to last character in string */
3446  last = first + strlen(first) - 1;
3447 
3448  /* Strip off any ';' or '\n' at the end */
3449  while (last >= first && (*last == '\n' || *last == ';'))
3450  last--;
3451  *(last + 1) = '\0';
3452 
3453  appendPQExpBufferStr(buf, first);
3454 
3455  free(first);
3456  return;
3457  }
3458 
3459  pg_log_warning("don't know how to set owner for object type \"%s\"",
3460  type);
3461 }
3462 
3463 /*
3464  * Emit the SQL commands to create the object represented by a TOC entry
3465  *
3466  * This now also includes issuing an ALTER OWNER command to restore the
3467  * object's ownership, if wanted. But note that the object's permissions
3468  * will remain at default, until the matching ACL TOC entry is restored.
3469  */
3470 static void
3471 _printTocEntry(ArchiveHandle *AH, TocEntry *te, bool isData)
3472 {
3473  RestoreOptions *ropt = AH->public.ropt;
3474 
3475  /* Select owner, schema, tablespace and default AM as necessary */
3476  _becomeOwner(AH, te);
3477  _selectOutputSchema(AH, te->namespace);
3478  _selectTablespace(AH, te->tablespace);
3479  _selectTableAccessMethod(AH, te->tableam);
3480 
3481  /* Emit header comment for item */
3482  if (!AH->noTocComments)
3483  {
3484  const char *pfx;
3485  char *sanitized_name;
3486  char *sanitized_schema;
3487  char *sanitized_owner;
3488 
3489  if (isData)
3490  pfx = "Data for ";
3491  else
3492  pfx = "";
3493 
3494  ahprintf(AH, "--\n");
3495  if (AH->public.verbose)
3496  {
3497  ahprintf(AH, "-- TOC entry %d (class %u OID %u)\n",
3498  te->dumpId, te->catalogId.tableoid, te->catalogId.oid);
3499  if (te->nDeps > 0)
3500  {
3501  int i;
3502 
3503  ahprintf(AH, "-- Dependencies:");
3504  for (i = 0; i < te->nDeps; i++)
3505  ahprintf(AH, " %d", te->dependencies[i]);
3506  ahprintf(AH, "\n");
3507  }
3508  }
3509 
3510  sanitized_name = sanitize_line(te->tag, false);
3511  sanitized_schema = sanitize_line(te->namespace, true);
3512  sanitized_owner = sanitize_line(ropt->noOwner ? NULL : te->owner, true);
3513 
3514  ahprintf(AH, "-- %sName: %s; Type: %s; Schema: %s; Owner: %s",
3515  pfx, sanitized_name, te->desc, sanitized_schema,
3516  sanitized_owner);
3517 
3518  free(sanitized_name);
3519  free(sanitized_schema);
3520  free(sanitized_owner);
3521 
3522  if (te->tablespace && strlen(te->tablespace) > 0 && !ropt->noTablespace)
3523  {
3524  char *sanitized_tablespace;
3525 
3526  sanitized_tablespace = sanitize_line(te->tablespace, false);
3527  ahprintf(AH, "; Tablespace: %s", sanitized_tablespace);
3528  free(sanitized_tablespace);
3529  }
3530  ahprintf(AH, "\n");
3531 
3532  if (AH->PrintExtraTocPtr != NULL)
3533  AH->PrintExtraTocPtr(AH, te);
3534  ahprintf(AH, "--\n\n");
3535  }
3536 
3537  /*
3538  * Actually print the definition.
3539  *
3540  * Really crude hack for suppressing AUTHORIZATION clause that old pg_dump
3541  * versions put into CREATE SCHEMA. Don't mutate the variant for schema
3542  * "public" that is a comment. We have to do this when --no-owner mode is
3543  * selected. This is ugly, but I see no other good way ...
3544  */
3545  if (ropt->noOwner &&
3546  strcmp(te->desc, "SCHEMA") == 0 && strncmp(te->defn, "--", 2) != 0)
3547  {
3548  ahprintf(AH, "CREATE SCHEMA %s;\n\n\n", fmtId(te->tag));
3549  }
3550  else
3551  {
3552  if (te->defn && strlen(te->defn) > 0)
3553  ahprintf(AH, "%s\n\n", te->defn);
3554  }
3555 
3556  /*
3557  * If we aren't using SET SESSION AUTH to determine ownership, we must
3558  * instead issue an ALTER OWNER command. Schema "public" is special; when
3559  * a dump emits a comment in lieu of creating it, we use ALTER OWNER even
3560  * when using SET SESSION for all other objects. We assume that anything
3561  * without a DROP command is not a separately ownable object. All the
3562  * categories with DROP commands must appear in one list or the other.
3563  */
3564  if (!ropt->noOwner &&
3565  (!ropt->use_setsessauth ||
3566  (strcmp(te->desc, "SCHEMA") == 0 &&
3567  strncmp(te->defn, "--", 2) == 0)) &&
3568  te->owner && strlen(te->owner) > 0 &&
3569  te->dropStmt && strlen(te->dropStmt) > 0)
3570  {
3571  if (strcmp(te->desc, "AGGREGATE") == 0 ||
3572  strcmp(te->desc, "BLOB") == 0 ||
3573  strcmp(te->desc, "COLLATION") == 0 ||
3574  strcmp(te->desc, "CONVERSION") == 0 ||
3575  strcmp(te->desc, "DATABASE") == 0 ||
3576  strcmp(te->desc, "DOMAIN") == 0 ||
3577  strcmp(te->desc, "FUNCTION") == 0 ||
3578  strcmp(te->desc, "OPERATOR") == 0 ||
3579  strcmp(te->desc, "OPERATOR CLASS") == 0 ||
3580  strcmp(te->desc, "OPERATOR FAMILY") == 0 ||
3581  strcmp(te->desc, "PROCEDURE") == 0 ||
3582  strcmp(te->desc, "PROCEDURAL LANGUAGE") == 0 ||
3583  strcmp(te->desc, "SCHEMA") == 0 ||
3584  strcmp(te->desc, "EVENT TRIGGER") == 0 ||
3585  strcmp(te->desc, "TABLE") == 0 ||
3586  strcmp(te->desc, "TYPE") == 0 ||
3587  strcmp(te->desc, "VIEW") == 0 ||
3588  strcmp(te->desc, "MATERIALIZED VIEW") == 0 ||
3589  strcmp(te->desc, "SEQUENCE") == 0 ||
3590  strcmp(te->desc, "FOREIGN TABLE") == 0 ||
3591  strcmp(te->desc, "TEXT SEARCH DICTIONARY") == 0 ||
3592  strcmp(te->desc, "TEXT SEARCH CONFIGURATION") == 0 ||
3593  strcmp(te->desc, "FOREIGN DATA WRAPPER") == 0 ||
3594  strcmp(te->desc, "SERVER") == 0 ||
3595  strcmp(te->desc, "STATISTICS") == 0 ||
3596  strcmp(te->desc, "PUBLICATION") == 0 ||
3597  strcmp(te->desc, "SUBSCRIPTION") == 0)
3598  {
3599  PQExpBuffer temp = createPQExpBuffer();
3600 
3601  appendPQExpBufferStr(temp, "ALTER ");
3602  _getObjectDescription(temp, te);
3603  appendPQExpBuffer(temp, " OWNER TO %s;", fmtId(te->owner));
3604  ahprintf(AH, "%s\n\n", temp->data);
3605  destroyPQExpBuffer(temp);
3606  }
3607  else if (strcmp(te->desc, "CAST") == 0 ||
3608  strcmp(te->desc, "CHECK CONSTRAINT") == 0 ||
3609  strcmp(te->desc, "CONSTRAINT") == 0 ||
3610  strcmp(te->desc, "DATABASE PROPERTIES") == 0 ||
3611  strcmp(te->desc, "DEFAULT") == 0 ||
3612  strcmp(te->desc, "FK CONSTRAINT") == 0 ||
3613  strcmp(te->desc, "INDEX") == 0 ||
3614  strcmp(te->desc, "RULE") == 0 ||
3615  strcmp(te->desc, "TRIGGER") == 0 ||
3616  strcmp(te->desc, "ROW SECURITY") == 0 ||
3617  strcmp(te->desc, "POLICY") == 0 ||
3618  strcmp(te->desc, "USER MAPPING") == 0)
3619  {
3620  /* these object types don't have separate owners */
3621  }
3622  else
3623  {
3624  pg_log_warning("don't know how to set owner for object type \"%s\"",
3625  te->desc);
3626  }
3627  }
3628 
3629  /*
3630  * If it's an ACL entry, it might contain SET SESSION AUTHORIZATION
3631  * commands, so we can no longer assume we know the current auth setting.
3632  */
3633  if (_tocEntryIsACL(te))
3634  {
3635  if (AH->currUser)
3636  free(AH->currUser);
3637  AH->currUser = NULL;
3638  }
3639 }
3640 
3641 /*
3642  * Sanitize a string to be included in an SQL comment or TOC listing, by
3643  * replacing any newlines with spaces. This ensures each logical output line
3644  * is in fact one physical output line, to prevent corruption of the dump
3645  * (which could, in the worst case, present an SQL injection vulnerability
3646  * if someone were to incautiously load a dump containing objects with
3647  * maliciously crafted names).
3648  *
3649  * The result is a freshly malloc'd string. If the input string is NULL,
3650  * return a malloc'ed empty string, unless want_hyphen, in which case return a
3651  * malloc'ed hyphen.
3652  *
3653  * Note that we currently don't bother to quote names, meaning that the name
3654  * fields aren't automatically parseable. "pg_restore -L" doesn't care because
3655  * it only examines the dumpId field, but someday we might want to try harder.
3656  */
3657 static char *
3658 sanitize_line(const char *str, bool want_hyphen)
3659 {
3660  char *result;
3661  char *s;
3662 
3663  if (!str)
3664  return pg_strdup(want_hyphen ? "-" : "");
3665 
3666  result = pg_strdup(str);
3667 
3668  for (s = result; *s != '\0'; s++)
3669  {
3670  if (*s == '\n' || *s == '\r')
3671  *s = ' ';
3672  }
3673 
3674  return result;
3675 }
3676 
3677 /*
3678  * Write the file header for a custom-format archive
3679  */
3680 void
3681 WriteHead(ArchiveHandle *AH)
3682 {
3683  struct tm crtm;
3684 
3685  AH->WriteBufPtr(AH, "PGDMP", 5); /* Magic code */
3686  AH->WriteBytePtr(AH, ARCHIVE_MAJOR(AH->version));
3687  AH->WriteBytePtr(AH, ARCHIVE_MINOR(AH->version));
3688  AH->WriteBytePtr(AH, ARCHIVE_REV(AH->version));
3689  AH->WriteBytePtr(AH, AH->intSize);
3690  AH->WriteBytePtr(AH, AH->offSize);
3691  AH->WriteBytePtr(AH, AH->format);
3692  WriteInt(AH, AH->compression);
3693  crtm = *localtime(&AH->createDate);
3694  WriteInt(AH, crtm.tm_sec);
3695  WriteInt(AH, crtm.tm_min);
3696  WriteInt(AH, crtm.tm_hour);
3697  WriteInt(AH, crtm.tm_mday);
3698  WriteInt(AH, crtm.tm_mon);
3699  WriteInt(AH, crtm.tm_year);
3700  WriteInt(AH, crtm.tm_isdst);
3701  WriteStr(AH, PQdb(AH->connection));
3702  WriteStr(AH, AH->public.remoteVersionStr);
3703  WriteStr(AH, PG_VERSION);
3704 }
3705 
3706 void
3707 ReadHead(ArchiveHandle *AH)
3708 {
3709  char vmaj,
3710  vmin,
3711  vrev;
3712  int fmt;
3713 
3714  /*
3715  * If we haven't already read the header, do so.
3716  *
3717  * NB: this code must agree with _discoverArchiveFormat(). Maybe find a
3718  * way to unify the cases?
3719  */
3720  if (!AH->readHeader)
3721  {
3722  char tmpMag[7];
3723 
3724  AH->ReadBufPtr(AH, tmpMag, 5);
3725 
3726  if (strncmp(tmpMag, "PGDMP", 5) != 0)
3727  fatal("did not find magic string in file header");
3728  }
3729 
3730  vmaj = AH->ReadBytePtr(AH);
3731  vmin = AH->ReadBytePtr(AH);
3732 
3733  if (vmaj > 1 || (vmaj == 1 && vmin > 0)) /* Version > 1.0 */
3734  vrev = AH->ReadBytePtr(AH);
3735  else
3736  vrev = 0;
3737 
3738  AH->version = MAKE_ARCHIVE_VERSION(vmaj, vmin, vrev);
3739 
3740  if (AH->version < K_VERS_1_0 || AH->version > K_VERS_MAX)
3741  fatal("unsupported version (%d.%d) in file header",
3742  vmaj, vmin);
3743 
3744  AH->intSize = AH->ReadBytePtr(AH);
3745  if (AH->intSize > 32)
3746  fatal("sanity check on integer size (%lu) failed",
3747  (unsigned long) AH->intSize);
3748 
3749  if (AH->intSize > sizeof(int))
3750  pg_log_warning("archive was made on a machine with larger integers, some operations might fail");
3751 
3752  if (AH->version >= K_VERS_1_7)
3753  AH->offSize = AH->ReadBytePtr(AH);
3754  else
3755  AH->offSize = AH->intSize;
3756 
3757  fmt = AH->ReadBytePtr(AH);
3758 
3759  if (AH->format != fmt)
3760  fatal("expected format (%d) differs from format found in file (%d)",
3761  AH->format, fmt);
3762 
3763  if (AH->version >= K_VERS_1_2)
3764  {
3765  if (AH->version < K_VERS_1_4)
3766  AH->compression = AH->ReadBytePtr(AH);
3767  else
3768  AH->compression = ReadInt(AH);
3769  }
3770  else
3771  AH->compression = Z_DEFAULT_COMPRESSION;
3772 
3773 #ifndef HAVE_LIBZ
3774  if (AH->compression != 0)
3775  pg_log_warning("archive is compressed, but this installation does not support compression -- no data will be available");
3776 #endif
3777 
3778  if (AH->version >= K_VERS_1_4)
3779  {
3780  struct tm crtm;
3781 
3782  crtm.tm_sec = ReadInt(AH);
3783  crtm.tm_min = ReadInt(AH);
3784  crtm.tm_hour = ReadInt(AH);
3785  crtm.tm_mday = ReadInt(AH);
3786  crtm.tm_mon = ReadInt(AH);
3787  crtm.tm_year = ReadInt(AH);
3788  crtm.tm_isdst = ReadInt(AH);
3789 
3790  /*
3791  * Newer versions of glibc have mktime() report failure if tm_isdst is
3792  * inconsistent with the prevailing timezone, e.g. tm_isdst = 1 when
3793  * TZ=UTC. This is problematic when restoring an archive under a
3794  * different timezone setting. If we get a failure, try again with
3795  * tm_isdst set to -1 ("don't know").
3796  *
3797  * XXX with or without this hack, we reconstruct createDate
3798  * incorrectly when the prevailing timezone is different from
3799  * pg_dump's. Next time we bump the archive version, we should flush
3800  * this representation and store a plain seconds-since-the-Epoch
3801  * timestamp instead.
3802  */
3803  AH->createDate = mktime(&crtm);
3804  if (AH->createDate == (time_t) -1)
3805  {
3806  crtm.tm_isdst = -1;
3807  AH->createDate = mktime(&crtm);
3808  if (AH->createDate == (time_t) -1)
3809  pg_log_warning("invalid creation date in header");
3810  }
3811  }
3812 
3813  if (AH->version >= K_VERS_1_4)
3814  {
3815  AH->archdbname = ReadStr(AH);
3816  }
3817 
3818  if (AH->version >= K_VERS_1_10)
3819  {
3820  AH->archiveRemoteVersion = ReadStr(AH);
3821  AH->archiveDumpVersion = ReadStr(AH);
3822  }
3823 }
3824 
3825 
3826 /*
3827  * checkSeek
3828  * check to see if ftell/fseek can be performed.
3829  */
3830 bool
3831 checkSeek(FILE *fp)
3832 {
3833  pgoff_t tpos;
3834 
3835  /* Check that ftello works on this file */
3836  tpos = ftello(fp);
3837  if (tpos < 0)
3838  return false;
3839 
3840  /*
3841  * Check that fseeko(SEEK_SET) works, too. NB: we used to try to test
3842  * this with fseeko(fp, 0, SEEK_CUR). But some platforms treat that as a
3843  * successful no-op even on files that are otherwise unseekable.
3844  */
3845  if (fseeko(fp, tpos, SEEK_SET) != 0)
3846  return false;
3847 
3848  return true;
3849 }
3850 
3851 
3852 /*
3853  * dumpTimestamp
3854  */
3855 static void
3856 dumpTimestamp(ArchiveHandle *AH, const char *msg, time_t tim)
3857 {
3858  char buf[64];
3859 
3860  if (strftime(buf, sizeof(buf), PGDUMP_STRFTIME_FMT, localtime(&tim)) != 0)
3861  ahprintf(AH, "-- %s %s\n\n", msg, buf);
3862 }
3863 
3864 /*
3865  * Main engine for parallel restore.
3866  *
3867  * Parallel restore is done in three phases. In this first phase,
3868  * we'll process all SECTION_PRE_DATA TOC entries that are allowed to be
3869  * processed in the RESTORE_PASS_MAIN pass. (In practice, that's all
3870  * PRE_DATA items other than ACLs.) Entries we can't process now are
3871  * added to the pending_list for later phases to deal with.
3872  */
3873 static void
3874 restore_toc_entries_prefork(ArchiveHandle *AH, TocEntry *pending_list)
3875 {
3876  bool skipped_some;
3877  TocEntry *next_work_item;
3878 
3879  pg_log_debug("entering restore_toc_entries_prefork");
3880 
3881  /* Adjust dependency information */
3882  fix_dependencies(AH);
3883 
3884  /*
3885  * Do all the early stuff in a single connection in the parent. There's no
3886  * great point in running it in parallel, in fact it will actually run
3887  * faster in a single connection because we avoid all the connection and
3888  * setup overhead. Also, pre-9.2 pg_dump versions were not very good
3889  * about showing all the dependencies of SECTION_PRE_DATA items, so we do
3890  * not risk trying to process them out-of-order.
3891  *
3892  * Stuff that we can't do immediately gets added to the pending_list.
3893  * Note: we don't yet filter out entries that aren't going to be restored.
3894  * They might participate in dependency chains connecting entries that
3895  * should be restored, so we treat them as live until we actually process
3896  * them.
3897  *
3898  * Note: as of 9.2, it should be guaranteed that all PRE_DATA items appear
3899  * before DATA items, and all DATA items before POST_DATA items. That is
3900  * not certain to be true in older archives, though, and in any case use
3901  * of a list file would destroy that ordering (cf. SortTocFromFile). So
3902  * this loop cannot assume that it holds.
3903  */
3904  AH->restorePass = RESTORE_PASS_MAIN;
3905  skipped_some = false;
3906  for (next_work_item = AH->toc->next; next_work_item != AH->toc; next_work_item = next_work_item->next)
3907  {
3908  bool do_now = true;
3909 
3910  if (next_work_item->section != SECTION_PRE_DATA)
3911  {
3912  /* DATA and POST_DATA items are just ignored for now */
3913  if (next_work_item->section == SECTION_DATA ||
3914  next_work_item->section == SECTION_POST_DATA)
3915  {
3916  do_now = false;
3917  skipped_some = true;
3918  }
3919  else
3920  {
3921  /*
3922  * SECTION_NONE items, such as comments, can be processed now
3923  * if we are still in the PRE_DATA part of the archive. Once
3924  * we've skipped any items, we have to consider whether the
3925  * comment's dependencies are satisfied, so skip it for now.
3926  */
3927  if (skipped_some)
3928  do_now = false;
3929  }
3930  }
3931 
3932  /*
3933  * Also skip items that need to be forced into later passes. We need
3934  * not set skipped_some in this case, since by assumption no main-pass
3935  * items could depend on these.
3936  */
3937  if (_tocEntryRestorePass(next_work_item) != RESTORE_PASS_MAIN)
3938  do_now = false;
3939 
3940  if (do_now)
3941  {
3942  /* OK, restore the item and update its dependencies */
3943  pg_log_info("processing item %d %s %s",
3944  next_work_item->dumpId,
3945  next_work_item->desc, next_work_item->tag);
3946 
3947  (void) restore_toc_entry(AH, next_work_item, false);
3948 
3949  /* Reduce dependencies, but don't move anything to ready_list */
3950  reduce_dependencies(AH, next_work_item, NULL);
3951  }
3952  else
3953  {
3954  /* Nope, so add it to pending_list */
3955  pending_list_append(pending_list, next_work_item);
3956  }
3957  }
3958 
3959  /*
3960  * Now close parent connection in prep for parallel steps. We do this
3961  * mainly to ensure that we don't exceed the specified number of parallel
3962  * connections.
3963  */
3964  DisconnectDatabase(&AH->public);
3965 
3966  /* blow away any transient state from the old connection */
3967  if (AH->currUser)
3968  free(AH->currUser);
3969  AH->currUser = NULL;
3970  if (AH->currSchema)
3971  free(AH->currSchema);
3972  AH->currSchema = NULL;
3973  if (AH->currTablespace)
3974  free(AH->currTablespace);
3975  AH->currTablespace = NULL;
3976  if (AH->currTableAm)
3977  free(AH->currTableAm);
3978  AH->currTableAm = NULL;
3979 }
3980 
3981 /*
3982  * Main engine for parallel restore.
3983  *
3984  * Parallel restore is done in three phases. In this second phase,
3985  * we process entries by dispatching them to parallel worker children
3986  * (processes on Unix, threads on Windows), each of which connects
3987  * separately to the database. Inter-entry dependencies are respected,
3988  * and so is the RestorePass multi-pass structure. When we can no longer
3989  * make any entries ready to process, we exit. Normally, there will be
3990  * nothing left to do; but if there is, the third phase will mop up.
3991  */
3992 static void
3993 restore_toc_entries_parallel(ArchiveHandle *AH, ParallelState *pstate,
3994  TocEntry *pending_list)
3995 {
3996  ParallelReadyList ready_list;
3997  TocEntry *next_work_item;
3998 
3999  pg_log_debug("entering restore_toc_entries_parallel");
4000 
4001  /* Set up ready_list with enough room for all known TocEntrys */
4002  ready_list_init(&ready_list, AH->tocCount);
4003 
4004  /*
4005  * The pending_list contains all items that we need to restore. Move all
4006  * items that are available to process immediately into the ready_list.
4007  * After this setup, the pending list is everything that needs to be done
4008  * but is blocked by one or more dependencies, while the ready list
4009  * contains items that have no remaining dependencies and are OK to
4010  * process in the current restore pass.
4011  */
4012  AH->restorePass = RESTORE_PASS_MAIN;
4013  move_to_ready_list(pending_list, &ready_list, AH->restorePass);
4014 
4015  /*
4016  * main parent loop
4017  *
4018  * Keep going until there is no worker still running AND there is no work
4019  * left to be done. Note invariant: at top of loop, there should always
4020  * be at least one worker available to dispatch a job to.
4021  */
4022  pg_log_info("entering main parallel loop");
4023 
4024  for (;;)
4025  {
4026  /* Look for an item ready to be dispatched to a worker */
4027  next_work_item = pop_next_work_item(&ready_list, pstate);
4028  if (next_work_item != NULL)
4029  {
4030  /* If not to be restored, don't waste time launching a worker */
4031  if ((next_work_item->reqs & (REQ_SCHEMA | REQ_DATA)) == 0)
4032  {
4033  pg_log_info("skipping item %d %s %s",
4034  next_work_item->dumpId,
4035  next_work_item->desc, next_work_item->tag);
4036  /* Update its dependencies as though we'd completed it */
4037  reduce_dependencies(AH, next_work_item, &ready_list);
4038  /* Loop around to see if anything else can be dispatched */
4039  continue;
4040  }
4041 
4042  pg_log_info("launching item %d %s %s",
4043  next_work_item->dumpId,
4044  next_work_item->desc, next_work_item->tag);
4045 
4046  /* Dispatch to some worker */
4047  DispatchJobForTocEntry(AH, pstate, next_work_item, ACT_RESTORE,
4048  mark_restore_job_done, &ready_list);
4049  }
4050  else if (IsEveryWorkerIdle(pstate))
4051  {
4052  /*
4053  * Nothing is ready and no worker is running, so we're done with
4054  * the current pass or maybe with the whole process.
4055  */
4056  if (AH->restorePass == RESTORE_PASS_LAST)
4057  break; /* No more parallel processing is possible */
4058 
4059  /* Advance to next restore pass */
4060  AH->restorePass++;
4061  /* That probably allows some stuff to be made ready */
4062  move_to_ready_list(pending_list, &ready_list, AH->restorePass);
4063  /* Loop around to see if anything's now ready */
4064  continue;
4065  }
4066  else
4067  {
4068  /*
4069  * We have nothing ready, but at least one child is working, so
4070  * wait for some subjob to finish.
4071  */
4072  }
4073 
4074  /*
4075  * Before dispatching another job, check to see if anything has
4076  * finished. We should check every time through the loop so as to
4077  * reduce dependencies as soon as possible. If we were unable to
4078  * dispatch any job this time through, wait until some worker finishes
4079  * (and, hopefully, unblocks some pending item). If we did dispatch
4080  * something, continue as soon as there's at least one idle worker.
4081  * Note that in either case, there's guaranteed to be at least one
4082  * idle worker when we return to the top of the loop. This ensures we
4083  * won't block inside DispatchJobForTocEntry, which would be
4084  * undesirable: we'd rather postpone dispatching until we see what's
4085  * been unblocked by finished jobs.
4086  */
4087  WaitForWorkers(AH, pstate,
4088  next_work_item ? WFW_ONE_IDLE : WFW_GOT_STATUS);
4089  }
4090 
4091  /* There should now be nothing in ready_list. */
4092  Assert(ready_list.first_te > ready_list.last_te);
4093 
4094  ready_list_free(&ready_list);
4095 
4096  pg_log_info("finished main parallel loop");
4097 }
4098 
4099 /*
4100  * Main engine for parallel restore.
4101  *
4102  * Parallel restore is done in three phases. In this third phase,
4103  * we mop up any remaining TOC entries by processing them serially.
4104  * This phase normally should have nothing to do, but if we've somehow
4105  * gotten stuck due to circular dependencies or some such, this provides
4106  * at least some chance of completing the restore successfully.
4107  */
4108 static void
4109 restore_toc_entries_postfork(ArchiveHandle *AH, TocEntry *pending_list)
4110 {
4111  RestoreOptions *ropt = AH->public.ropt;
4112  TocEntry *te;
4113 
4114  pg_log_debug("entering restore_toc_entries_postfork");
4115 
4116  /*
4117  * Now reconnect the single parent connection.
4118  */
4119  ConnectDatabase((Archive *) AH, &ropt->cparams, true);
4120 
4121  /* re-establish fixed state */
4122  _doSetFixedOutputState(AH);
4123 
4124  /*
4125  * Make sure there is no work left due to, say, circular dependencies, or
4126  * some other pathological condition. If so, do it in the single parent
4127  * connection. We don't sweat about RestorePass ordering; it's likely we
4128  * already violated that.
4129  */
4130  for (te = pending_list->pending_next; te != pending_list; te = te->pending_next)
4131  {
4132  pg_log_info("processing missed item %d %s %s",
4133  te->dumpId, te->desc, te->tag);
4134  (void) restore_toc_entry(AH, te, false);
4135  }
4136 }
4137 
4138 /*
4139  * Check if te1 has an exclusive lock requirement for an item that te2 also
4140  * requires, whether or not te2's requirement is for an exclusive lock.
4141  */
4142 static bool
4143 has_lock_conflicts(TocEntry *te1, TocEntry *te2)
4144 {
4145  int j,
4146  k;
4147 
4148  for (j = 0; j < te1->nLockDeps; j++)
4149  {
4150  for (k = 0; k < te2->nDeps; k++)
4151  {
4152  if (te1->lockDeps[j] == te2->dependencies[k])
4153  return true;
4154  }
4155  }
4156  return false;
4157 }
4158 
4159 
4160 /*
4161  * Initialize the header of the pending-items list.
4162  *
4163  * This is a circular list with a dummy TocEntry as header, just like the
4164  * main TOC list; but we use separate list links so that an entry can be in
4165  * the main TOC list as well as in the pending list.
4166  */
4167 static void
4168 pending_list_header_init(TocEntry *l)
4169 {
4170  l->pending_prev = l->pending_next = l;
4171 }
4172 
4173 /* Append te to the end of the pending-list headed by l */
4174 static void
4175 pending_list_append(TocEntry *l, TocEntry *te)
4176 {
4177  te->pending_prev = l->pending_prev;
4178  l->pending_prev->pending_next = te;
4179  l->pending_prev = te;
4180  te->pending_next = l;
4181 }
4182 
4183 /* Remove te from the pending-list */
4184 static void
4185 pending_list_remove(TocEntry *te)
4186 {
4187  te->pending_prev->pending_next = te->pending_next;
4188  te->pending_next->pending_prev = te->pending_prev;
4189  te->pending_prev = NULL;
4190  te->pending_next = NULL;
4191 }
4192 
4193 
4194 /*
4195  * Initialize the ready_list with enough room for up to tocCount entries.
4196  */
4197 static void
4198 ready_list_init(ParallelReadyList *ready_list, int tocCount)
4199 {
4200  ready_list->tes = (TocEntry **)
4201  pg_malloc(tocCount * sizeof(TocEntry *));
4202  ready_list->first_te = 0;
4203  ready_list->last_te = -1;
4204  ready_list->sorted = false;
4205 }
4206 
4207 /*
4208  * Free storage for a ready_list.
4209  */
4210 static void
4211 ready_list_free(ParallelReadyList *ready_list)
4212 {
4213  pg_free(ready_list->tes);
4214 }
4215 
4216 /* Add te to the ready_list */
4217 static void
4218 ready_list_insert(ParallelReadyList *ready_list, TocEntry *te)
4219 {
4220  ready_list->tes[++ready_list->last_te] = te;
4221  /* List is (probably) not sorted anymore. */
4222  ready_list->sorted = false;
4223 }
4224 
4225 /* Remove the i'th entry in the ready_list */
4226 static void
4227 ready_list_remove(ParallelReadyList *ready_list, int i)
4228 {
4229  int f = ready_list->first_te;
4230 
4231  Assert(i >= f && i <= ready_list->last_te);
4232 
4233  /*
4234  * In the typical case where the item to be removed is the first ready
4235  * entry, we need only increment first_te to remove it. Otherwise, move
4236  * the entries before it to compact the list. (This preserves sortedness,
4237  * if any.) We could alternatively move the entries after i, but there
4238  * are typically many more of those.
4239  */
4240  if (i > f)
4241  {
4242  TocEntry **first_te_ptr = &ready_list->tes[f];
4243 
4244  memmove(first_te_ptr + 1, first_te_ptr, (i - f) * sizeof(TocEntry *));
4245  }
4246  ready_list->first_te++;
4247 }
4248 
4249 /* Sort the ready_list into the desired order */
4250 static void
4251 ready_list_sort(ParallelReadyList *ready_list)
4252 {
4253  if (!ready_list->sorted)
4254  {
4255  int n = ready_list->last_te - ready_list->first_te + 1;
4256 
4257  if (n > 1)
4258  qsort(ready_list->tes + ready_list->first_te, n,
4259  sizeof(TocEntry *),
4260  TocEntrySizeCompare);
4261  ready_list->sorted = true;
4262  }
4263 }
4264 
4265 /* qsort comparator for sorting TocEntries by dataLength */
4266 static int
4267 TocEntrySizeCompare(const void *p1, const void *p2)
4268 {
4269  const TocEntry *te1 = *(const TocEntry *const *) p1;
4270  const TocEntry *te2 = *(const TocEntry *const *) p2;
4271 
4272  /* Sort by decreasing dataLength */
4273  if (te1->dataLength > te2->dataLength)
4274  return -1;
4275  if (te1->dataLength < te2->dataLength)
4276  return 1;
4277 
4278  /* For equal dataLengths, sort by dumpId, just to be stable */
4279  if (te1->dumpId < te2->dumpId)
4280  return -1;
4281  if (te1->dumpId > te2->dumpId)
4282  return 1;
4283 
4284  return 0;
4285 }
4286 
4287 
4288 /*
4289  * Move all immediately-ready items from pending_list to ready_list.
4290  *
4291  * Items are considered ready if they have no remaining dependencies and
4292  * they belong in the current restore pass. (See also reduce_dependencies,
4293  * which applies the same logic one-at-a-time.)
4294  */
4295 static void
4296 move_to_ready_list(TocEntry *pending_list,
4297  ParallelReadyList *ready_list,
4298  RestorePass pass)
4299 {
4300  TocEntry *te;
4301  TocEntry *next_te;
4302 
4303  for (te = pending_list->pending_next; te != pending_list; te = next_te)
4304  {
4305  /* must save list link before possibly removing te from list */
4306  next_te = te->pending_next;
4307 
4308  if (te->depCount == 0 &&
4309  _tocEntryRestorePass(te) == pass)
4310  {
4311  /* Remove it from pending_list ... */
4312  pending_list_remove(te);
4313  /* ... and add to ready_list */
4314  ready_list_insert(ready_list, te);
4315  }
4316  }
4317 }
4318 
4319 /*
4320  * Find the next work item (if any) that is capable of being run now,
4321  * and remove it from the ready_list.
4322  *
4323  * Returns the item, or NULL if nothing is runnable.
4324  *
4325  * To qualify, the item must have no remaining dependencies
4326  * and no requirements for locks that are incompatible with
4327  * items currently running. Items in the ready_list are known to have
4328  * no remaining dependencies, but we have to check for lock conflicts.
4329  */
4330 static TocEntry *
4331 pop_next_work_item(ParallelReadyList *ready_list,
4332  ParallelState *pstate)
4333 {
4334  /*
4335  * Sort the ready_list so that we'll tackle larger jobs first.
4336  */
4337  ready_list_sort(ready_list);
4338 
4339  /*
4340  * Search the ready_list until we find a suitable item.
4341  */
4342  for (int i = ready_list->first_te; i <= ready_list->last_te; i++)
4343  {
4344  TocEntry *te = ready_list->tes[i];
4345  bool conflicts = false;
4346 
4347  /*
4348  * Check to see if the item would need exclusive lock on something
4349  * that a currently running item also needs lock on, or vice versa. If
4350  * so, we don't want to schedule them together.
4351  */
4352  for (int k = 0; k < pstate->numWorkers; k++)
4353  {
4354  TocEntry *running_te = pstate->te[k];
4355 
4356  if (running_te == NULL)
4357  continue;
4358  if (has_lock_conflicts(te, running_te) ||
4359  has_lock_conflicts(running_te, te))
4360  {
4361  conflicts = true;
4362  break;
4363  }
4364  }
4365 
4366  if (conflicts)
4367  continue;
4368 
4369  /* passed all tests, so this item can run */
4370  ready_list_remove(ready_list, i);
4371  return te;
4372  }
4373 
4374  pg_log_debug("no item ready");
4375  return NULL;
4376 }
4377 
4378 
4379 /*
4380  * Restore a single TOC item in parallel with others
4381  *
4382  * this is run in the worker, i.e. in a thread (Windows) or a separate process
4383  * (everything else). A worker process executes several such work items during
4384  * a parallel backup or restore. Once we terminate here and report back that
4385  * our work is finished, the leader process will assign us a new work item.
4386  */
4387 int
4388 parallel_restore(ArchiveHandle *AH, TocEntry *te)
4389 {
4390  int status;
4391 
4392  Assert(AH->connection != NULL);
4393 
4394  /* Count only errors associated with this TOC entry */
4395  AH->public.n_errors = 0;
4396 
4397  /* Restore the TOC item */
4398  status = restore_toc_entry(AH, te, true);
4399 
4400  return status;
4401 }
4402 
4403 
4404 /*
4405  * Callback function that's invoked in the leader process after a step has
4406  * been parallel restored.
4407  *
4408  * Update status and reduce the dependency count of any dependent items.
4409  */
4410 static void
4411 mark_restore_job_done(ArchiveHandle *AH,
4412  TocEntry *te,
4413  int status,
4414  void *callback_data)
4415 {
4416  ParallelReadyList *ready_list = (ParallelReadyList *) callback_data;
4417 
4418  pg_log_info("finished item %d %s %s",
4419  te->dumpId, te->desc, te->tag);
4420 
4421  if (status == WORKER_CREATE_DONE)
4422  mark_create_done(AH, te);
4423  else if (status == WORKER_INHIBIT_DATA)
4424  {
4425  inhibit_data_for_failed_table(AH, te);
4426  AH->public.n_errors++;
4427  }
4428  else if (status == WORKER_IGNORED_ERRORS)
4429  AH->public.n_errors++;
4430  else if (status != 0)
4431  fatal("worker process failed: exit code %d",
4432  status);
4433 
4434  reduce_dependencies(AH, te, ready_list);
4435 }
4436 
4437 
4438 /*
4439  * Process the dependency information into a form useful for parallel restore.
4440  *
4441  * This function takes care of fixing up some missing or badly designed
4442  * dependencies, and then prepares subsidiary data structures that will be
4443  * used in the main parallel-restore logic, including:
4444  * 1. We build the revDeps[] arrays of incoming dependency dumpIds.
4445  * 2. We set up depCount fields that are the number of as-yet-unprocessed
4446  * dependencies for each TOC entry.
4447  *
4448  * We also identify locking dependencies so that we can avoid trying to
4449  * schedule conflicting items at the same time.
4450  */
4451 static void
4452 fix_dependencies(ArchiveHandle *AH)
4453 {
4454  TocEntry *te;
4455  int i;
4456 
4457  /*
4458  * Initialize the depCount/revDeps/nRevDeps fields, and make sure the TOC
4459  * items are marked as not being in any parallel-processing list.
4460  */
4461  for (te = AH->toc->next; te != AH->toc; te = te->next)
4462  {
4463  te->depCount = te->nDeps;
4464  te->revDeps = NULL;
4465  te->nRevDeps = 0;
4466  te->pending_prev = NULL;
4467  te->pending_next = NULL;
4468  }
4469 
4470  /*
4471  * POST_DATA items that are shown as depending on a table need to be
4472  * re-pointed to depend on that table's data, instead. This ensures they
4473  * won't get scheduled until the data has been loaded.
4474  */
4475  repoint_table_dependencies(AH);
4476 
4477  /*
4478  * Pre-8.4 versions of pg_dump neglected to set up a dependency from BLOB
4479  * COMMENTS to BLOBS. Cope. (We assume there's only one BLOBS and only
4480  * one BLOB COMMENTS in such files.)
4481  */
4482  if (AH->version < K_VERS_1_11)
4483  {
4484  for (te = AH->toc->next; te != AH->toc; te = te->next)
4485  {
4486  if (strcmp(te->desc, "BLOB COMMENTS") == 0 && te->nDeps == 0)
4487  {
4488  TocEntry *te2;
4489 
4490  for (te2 = AH->toc->next; te2 != AH->toc; te2 = te2->next)
4491  {
4492  if (strcmp(te2->desc, "BLOBS") == 0)
4493  {
4494  te->dependencies = (DumpId *) pg_malloc(sizeof(DumpId));
4495  te->dependencies[0] = te2->dumpId;
4496  te->nDeps++;
4497  te->depCount++;
4498  break;
4499  }
4500  }
4501  break;
4502  }
4503  }
4504  }
4505 
4506  /*
4507  * At this point we start to build the revDeps reverse-dependency arrays,
4508  * so all changes of dependencies must be complete.
4509  */
4510 
4511  /*
4512  * Count the incoming dependencies for each item. Also, it is possible
4513  * that the dependencies list items that are not in the archive at all
4514  * (that should not happen in 9.2 and later, but is highly likely in older
4515  * archives). Subtract such items from the depCounts.
4516  */
4517  for (te = AH->toc->next; te != AH->toc; te = te->next)
4518  {
4519  for (i = 0; i < te->nDeps; i++)
4520  {
4521  DumpId depid = te->dependencies[i];
4522 
4523  if (depid <= AH->maxDumpId && AH->tocsByDumpId[depid] != NULL)
4524  AH->tocsByDumpId[depid]->nRevDeps++;
4525  else
4526  te->depCount--;
4527  }
4528  }
4529 
4530  /*
4531  * Allocate space for revDeps[] arrays, and reset nRevDeps so we can use
4532  * it as a counter below.
4533  */
4534  for (te = AH->toc->next; te != AH->toc; te = te->next)
4535  {
4536  if (te->nRevDeps > 0)
4537  te->revDeps = (DumpId *) pg_malloc(te->nRevDeps * sizeof(DumpId));
4538  te->nRevDeps = 0;
4539  }
4540 
4541  /*
4542  * Build the revDeps[] arrays of incoming-dependency dumpIds. This had
4543  * better agree with the loops above.
4544  */
4545  for (te = AH->toc->next; te != AH->toc; te = te->next)
4546  {
4547  for (i = 0; i < te->nDeps; i++)
4548  {
4549  DumpId depid = te->dependencies[i];
4550 
4551  if (depid <= AH->maxDumpId && AH->tocsByDumpId[depid] != NULL)
4552  {
4553  TocEntry *otherte = AH->tocsByDumpId[depid];
4554 
4555  otherte->revDeps[otherte->nRevDeps++] = te->dumpId;
4556  }
4557  }
4558  }
4559 
4560  /*
4561  * Lastly, work out the locking dependencies.
4562  */
4563  for (te = AH->toc->next; te != AH->toc; te = te->next)
4564  {
4565  te->lockDeps = NULL;
4566  te->nLockDeps = 0;
4567  identify_locking_dependencies(AH, te);
4568  }
4569 }
4570 
4571 /*
4572  * Change dependencies on table items to depend on table data items instead,
4573  * but only in POST_DATA items.
4574  *
4575  * Also, for any item having such dependency(s), set its dataLength to the
4576  * largest dataLength of the table data items it depends on. This ensures
4577  * that parallel restore will prioritize larger jobs (index builds, FK
4578  * constraint checks, etc) over smaller ones, avoiding situations where we
4579  * end a restore with only one active job working on a large table.
4580  */
4581 static void
4582 repoint_table_dependencies(ArchiveHandle *AH)
4583 {
4584  TocEntry *te;
4585  int i;
4586  DumpId olddep;
4587 
4588  for (te = AH->toc->next; te != AH->toc; te = te->next)
4589  {
4590  if (te->section != SECTION_POST_DATA)
4591  continue;
4592  for (i = 0; i < te->nDeps; i++)
4593  {
4594  olddep = te->dependencies[i];
4595  if (olddep <= AH->maxDumpId &&
4596  AH->tableDataId[olddep] != 0)
4597  {
4598  DumpId tabledataid = AH->tableDataId[olddep];
4599  TocEntry *tabledatate = AH->tocsByDumpId[tabledataid];
4600 
4601  te->dependencies[i] = tabledataid;
4602  te->dataLength = Max(te->dataLength, tabledatate->dataLength);
4603  pg_log_debug("transferring dependency %d -> %d to %d",
4604  te->dumpId, olddep, tabledataid);
4605  }
4606  }
4607  }
4608 }
4609 
4610 /*
4611  * Identify which objects we'll need exclusive lock on in order to restore
4612  * the given TOC entry (*other* than the one identified by the TOC entry
4613  * itself). Record their dump IDs in the entry's lockDeps[] array.
4614  */
4615 static void
4616 identify_locking_dependencies(ArchiveHandle *AH, TocEntry *te)
4617 {
4618  DumpId *lockids;
4619  int nlockids;
4620  int i;
4621 
4622  /*
4623  * We only care about this for POST_DATA items. PRE_DATA items are not
4624  * run in parallel, and DATA items are all independent by assumption.
4625  */
4626  if (te->section != SECTION_POST_DATA)
4627  return;
4628 
4629  /* Quick exit if no dependencies at all */
4630  if (te->nDeps == 0)
4631  return;
4632 
4633  /*
4634  * Most POST_DATA items are ALTER TABLEs or some moral equivalent of that,
4635  * and hence require exclusive lock. However, we know that CREATE INDEX
4636  * does not. (Maybe someday index-creating CONSTRAINTs will fall in that
4637  * category too ... but today is not that day.)
4638  */
4639  if (strcmp(te->desc, "INDEX") == 0)
4640  return;
4641 
4642  /*
4643  * We assume the entry requires exclusive lock on each TABLE or TABLE DATA
4644  * item listed among its dependencies. Originally all of these would have
4645  * been TABLE items, but repoint_table_dependencies would have repointed
4646  * them to the TABLE DATA items if those are present (which they might not
4647  * be, eg in a schema-only dump). Note that all of the entries we are
4648  * processing here are POST_DATA; otherwise there might be a significant
4649  * difference between a dependency on a table and a dependency on its
4650  * data, so that closer analysis would be needed here.
4651  */
4652  lockids = (DumpId *) pg_malloc(te->nDeps * sizeof(DumpId));
4653  nlockids = 0;
4654  for (i = 0; i < te->nDeps; i++)
4655  {
4656  DumpId depid = te->dependencies[i];
4657 
4658  if (depid <= AH->maxDumpId && AH->tocsByDumpId[depid] != NULL &&
4659  ((strcmp(AH->tocsByDumpId[depid]->desc, "TABLE DATA") == 0) ||
4660  strcmp(AH->tocsByDumpId[depid]->desc, "TABLE") == 0))
4661  lockids[nlockids++] = depid;
4662  }
4663 
4664  if (nlockids == 0)
4665  {
4666  free(lockids);
4667  return;
4668  }
4669 
4670  te->lockDeps = pg_realloc(lockids, nlockids * sizeof(DumpId));
4671  te->nLockDeps = nlockids;
4672 }
4673 
4674 /*
4675  * Remove the specified TOC entry from the depCounts of items that depend on
4676  * it, thereby possibly making them ready-to-run. Any pending item that
4677  * becomes ready should be moved to the ready_list, if that's provided.
4678  */
4679 static void
4680 reduce_dependencies(ArchiveHandle *AH, TocEntry *te,
4681  ParallelReadyList *ready_list)
4682 {
4683  int i;
4684 
4685  pg_log_debug("reducing dependencies for %d", te->dumpId);
4686 
4687  for (i = 0; i < te->nRevDeps; i++)
4688  {
4689  TocEntry *otherte = AH->tocsByDumpId[te->revDeps[i]];
4690 
4691  Assert(otherte->depCount > 0);
4692  otherte->depCount--;
4693 
4694  /*
4695  * It's ready if it has no remaining dependencies, and it belongs in
4696  * the current restore pass, and it is currently a member of the
4697  * pending list (that check is needed to prevent double restore in
4698  * some cases where a list-file forces out-of-order restoring).
4699  * However, if ready_list == NULL then caller doesn't want any list
4700  * memberships changed.
4701  */
4702  if (otherte->depCount == 0 &&
4703  _tocEntryRestorePass(otherte) == AH->restorePass &&
4704  otherte->pending_prev != NULL &&
4705  ready_list != NULL)
4706  {
4707  /* Remove it from pending list ... */
4708  pending_list_remove(otherte);
4709  /* ... and add to ready_list */
4710  ready_list_insert(ready_list, otherte);
4711  }
4712  }
4713 }
4714 
4715 /*
4716  * Set the created flag on the DATA member corresponding to the given
4717  * TABLE member
4718  */
4719 static void
4720 mark_create_done(ArchiveHandle *AH, TocEntry *te)
4721 {
4722  if (AH->tableDataId[te->dumpId] != 0)
4723  {
4724  TocEntry *ted = AH->tocsByDumpId[AH->tableDataId[te->dumpId]];
4725 
4726  ted->created = true;
4727  }
4728 }
4729 
4730 /*
4731  * Mark the DATA member corresponding to the given TABLE member
4732  * as not wanted
4733  */
4734 static void
4735 inhibit_data_for_failed_table(ArchiveHandle *AH, TocEntry *te)
4736 {
4737  pg_log_info("table \"%s\" could not be created, will not restore its data",
4738  te->tag);
4739 
4740  if (AH->tableDataId[te->dumpId] != 0)
4741  {
4742  TocEntry *ted = AH->tocsByDumpId[AH->tableDataId[te->dumpId]];
4743 
4744  ted->reqs = 0;
4745  }
4746 }
4747 
4748 /*
4749  * Clone and de-clone routines used in parallel restoration.
4750  *
4751  * Enough of the structure is cloned to ensure that there is no
4752  * conflict between different threads each with their own clone.
4753  */
4754 ArchiveHandle *
4755 CloneArchive(ArchiveHandle *AH)
4756 {
4757  ArchiveHandle *clone;
4758 
4759  /* Make a "flat" copy */
4760  clone = (ArchiveHandle *) pg_malloc(sizeof(ArchiveHandle));
4761  memcpy(clone, AH, sizeof(ArchiveHandle));
4762 
4763  /* Handle format-independent fields */
4764  memset(&(clone->sqlparse), 0, sizeof(clone->sqlparse));
4765 
4766  /* The clone will have its own connection, so disregard connection state */
4767  clone->connection = NULL;
4768  clone->connCancel = NULL;
4769  clone->currUser = NULL;
4770  clone->currSchema = NULL;
4771  clone->currTablespace = NULL;
4772 
4773  /* savedPassword must be local in case we change it while connecting */
4774  if (clone->savedPassword)
4775  clone->savedPassword = pg_strdup(clone->savedPassword);
4776 
4777  /* clone has its own error count, too */
4778  clone->public.n_errors = 0;
4779 
4780  /*
4781  * Connect our new clone object to the database, using the same connection
4782  * parameters used for the original connection.
4783  */
4784  ConnectDatabase((Archive *) clone, &clone->public.ropt->cparams, true);
4785 
4786  /* re-establish fixed state */
4787  if (AH->mode == archModeRead)
4788  _doSetFixedOutputState(clone);
4789  /* in write case, setupDumpWorker will fix up connection state */
4790 
4791  /* Let the format-specific code have a chance too */
4792  clone->ClonePtr(clone);
4793 
4794  Assert(clone->connection != NULL);
4795  return clone;
4796 }
4797 
4798 /*
4799  * Release clone-local storage.
4800  *
4801  * Note: we assume any clone-local connection was already closed.
4802  */
4803 void
4804 DeCloneArchive(ArchiveHandle *AH)
4805 {
4806  /* Should not have an open database connection */
4807  Assert(AH->connection == NULL);
4808 
4809  /* Clear format-specific state */
4810  AH->DeClonePtr(AH);
4811 
4812  /* Clear state allocated by CloneArchive */
4813  if (AH->sqlparse.curCmd)
4814  destroyPQExpBuffer(AH->sqlparse.curCmd);
4815 
4816  /* Clear any connection-local state */
4817  if (AH->currUser)
4818  free(AH->currUser);
4819  if (AH->currSchema)
4820  free(AH->currSchema);
4821  if (AH->currTablespace)
4822  free(AH->currTablespace);
4823  if (AH->currTableAm)
4824  free(AH->currTableAm);
4825  if (AH->savedPassword)
4826  free(AH->savedPassword);
4827 
4828  free(AH);
4829 }
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