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pg_upgrade.h
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1 /*
2  * pg_upgrade.h
3  *
4  * Copyright (c) 2010-2024, PostgreSQL Global Development Group
5  * src/bin/pg_upgrade/pg_upgrade.h
6  */
7 
8 #include <unistd.h>
9 #include <assert.h>
10 #include <sys/stat.h>
11 #include <sys/time.h>
12 
13 #include "common/relpath.h"
14 #include "libpq-fe.h"
15 
16 /* For now, pg_upgrade does not use common/logging.c; use our own pg_fatal */
17 #undef pg_fatal
18 
19 /* Use port in the private/dynamic port number range */
20 #define DEF_PGUPORT 50432
21 
22 #define MAX_STRING 1024
23 #define QUERY_ALLOC 8192
24 
25 #define MESSAGE_WIDTH 62
26 
27 #define GET_MAJOR_VERSION(v) ((v) / 100)
28 
29 /* contains both global db information and CREATE DATABASE commands */
30 #define GLOBALS_DUMP_FILE "pg_upgrade_dump_globals.sql"
31 #define DB_DUMP_FILE_MASK "pg_upgrade_dump_%u.custom"
32 
33 /*
34  * Base directories that include all the files generated internally, from the
35  * root path of the new cluster. The paths are dynamically built as of
36  * BASE_OUTPUTDIR/$timestamp/{LOG_OUTPUTDIR,DUMP_OUTPUTDIR} to ensure their
37  * uniqueness in each run.
38  */
39 #define BASE_OUTPUTDIR "pg_upgrade_output.d"
40 #define LOG_OUTPUTDIR "log"
41 #define DUMP_OUTPUTDIR "dump"
42 
43 #define DB_DUMP_LOG_FILE_MASK "pg_upgrade_dump_%u.log"
44 #define SERVER_LOG_FILE "pg_upgrade_server.log"
45 #define UTILITY_LOG_FILE "pg_upgrade_utility.log"
46 #define INTERNAL_LOG_FILE "pg_upgrade_internal.log"
47 
48 extern char *output_files[];
49 
50 /*
51  * WIN32 files do not accept writes from multiple processes
52  *
53  * On Win32, we can't send both pg_upgrade output and command output to the
54  * same file because we get the error: "The process cannot access the file
55  * because it is being used by another process." so send the pg_ctl
56  * command-line output to a new file, rather than into the server log file.
57  * Ideally we could use UTILITY_LOG_FILE for this, but some Windows platforms
58  * keep the pg_ctl output file open by the running postmaster, even after
59  * pg_ctl exits.
60  *
61  * We could use the Windows pgwin32_open() flags to allow shared file
62  * writes but is unclear how all other tools would use those flags, so
63  * we just avoid it and log a little differently on Windows; we adjust
64  * the error message appropriately.
65  */
66 #ifndef WIN32
67 #define SERVER_START_LOG_FILE SERVER_LOG_FILE
68 #define SERVER_STOP_LOG_FILE SERVER_LOG_FILE
69 #else
70 #define SERVER_START_LOG_FILE "pg_upgrade_server_start.log"
71 /*
72  * "pg_ctl start" keeps SERVER_START_LOG_FILE and SERVER_LOG_FILE open
73  * while the server is running, so we use UTILITY_LOG_FILE for "pg_ctl
74  * stop".
75  */
76 #define SERVER_STOP_LOG_FILE UTILITY_LOG_FILE
77 #endif
78 
79 
80 #ifndef WIN32
81 #define pg_mv_file rename
82 #define PATH_SEPARATOR '/'
83 #define PATH_QUOTE '\''
84 #define RM_CMD "rm -f"
85 #define RMDIR_CMD "rm -rf"
86 #define SCRIPT_PREFIX "./"
87 #define SCRIPT_EXT "sh"
88 #define ECHO_QUOTE "'"
89 #define ECHO_BLANK ""
90 #else
91 #define pg_mv_file pgrename
92 #define PATH_SEPARATOR '\\'
93 #define PATH_QUOTE '"'
94 /* @ prefix disables command echo in .bat files */
95 #define RM_CMD "@DEL /q"
96 #define RMDIR_CMD "@RMDIR /s/q"
97 #define SCRIPT_PREFIX ""
98 #define SCRIPT_EXT "bat"
99 #define ECHO_QUOTE ""
100 #define ECHO_BLANK "."
101 #endif
102 
103 
104 /*
105  * The format of visibility map was changed with this 9.6 commit.
106  */
107 #define VISIBILITY_MAP_FROZEN_BIT_CAT_VER 201603011
108 
109 /*
110  * pg_multixact format changed in 9.3 commit 0ac5ad5134f2769ccbaefec73844f85,
111  * ("Improve concurrency of foreign key locking") which also updated catalog
112  * version to this value. pg_upgrade behavior depends on whether old and new
113  * server versions are both newer than this, or only the new one is.
114  */
115 #define MULTIXACT_FORMATCHANGE_CAT_VER 201301231
116 
117 /*
118  * large object chunk size added to pg_controldata,
119  * commit 5f93c37805e7485488480916b4585e098d3cc883
120  */
121 #define LARGE_OBJECT_SIZE_PG_CONTROL_VER 942
122 
123 /*
124  * change in JSONB format during 9.4 beta
125  */
126 #define JSONB_FORMAT_CHANGE_CAT_VER 201409291
127 
128 
129 /*
130  * Each relation is represented by a relinfo structure.
131  */
132 typedef struct
133 {
134  /* Can't use NAMEDATALEN; not guaranteed to be same on client */
135  char *nspname; /* namespace name */
136  char *relname; /* relation name */
137  Oid reloid; /* relation OID */
138  RelFileNumber relfilenumber; /* relation file number */
139  Oid indtable; /* if index, OID of its table, else 0 */
140  Oid toastheap; /* if toast table, OID of base table, else 0 */
141  char *tablespace; /* tablespace path; "" for cluster default */
142  bool nsp_alloc; /* should nspname be freed? */
143  bool tblsp_alloc; /* should tablespace be freed? */
144 } RelInfo;
145 
146 typedef struct
147 {
148  RelInfo *rels;
149  int nrels;
150 } RelInfoArr;
151 
152 /*
153  * Structure to store logical replication slot information.
154  */
155 typedef struct
156 {
157  char *slotname; /* slot name */
158  char *plugin; /* plugin */
159  bool two_phase; /* can the slot decode 2PC? */
160  bool caught_up; /* has the slot caught up to latest changes? */
161  bool invalid; /* if true, the slot is unusable */
162  bool failover; /* is the slot designated to be synced to the
163  * physical standby? */
164 } LogicalSlotInfo;
165 
166 typedef struct
167 {
168  int nslots; /* number of logical slot infos */
169  LogicalSlotInfo *slots; /* array of logical slot infos */
170 } LogicalSlotInfoArr;
171 
172 /*
173  * The following structure represents a relation mapping.
174  */
175 typedef struct
176 {
177  const char *old_tablespace;
178  const char *new_tablespace;
179  const char *old_tablespace_suffix;
180  const char *new_tablespace_suffix;
181  Oid db_oid;
182  RelFileNumber relfilenumber;
183  /* the rest are used only for logging and error reporting */
184  char *nspname; /* namespaces */
185  char *relname;
186 } FileNameMap;
187 
188 /*
189  * Structure to store database information
190  */
191 typedef struct
192 {
193  Oid db_oid; /* oid of the database */
194  char *db_name; /* database name */
195  char db_tablespace[MAXPGPATH]; /* database default tablespace
196  * path */
197  RelInfoArr rel_arr; /* array of all user relinfos */
198  LogicalSlotInfoArr slot_arr; /* array of all LogicalSlotInfo */
199 } DbInfo;
200 
201 /*
202  * Locale information about a database.
203  */
204 typedef struct
205 {
206  char *db_collate;
207  char *db_ctype;
208  char db_collprovider;
209  char *db_locale;
210  int db_encoding;
211 } DbLocaleInfo;
212 
213 typedef struct
214 {
215  DbInfo *dbs; /* array of db infos */
216  int ndbs; /* number of db infos */
217 } DbInfoArr;
218 
219 /*
220  * The following structure is used to hold pg_control information.
221  * Rather than using the backend's control structure we use our own
222  * structure to avoid pg_control version issues between releases.
223  */
224 typedef struct
225 {
226  uint32 ctrl_ver;
227  uint32 cat_ver;
228  char nextxlogfile[25];
229  uint32 chkpnt_nxtxid;
230  uint32 chkpnt_nxtepoch;
231  uint32 chkpnt_nxtoid;
232  uint32 chkpnt_nxtmulti;
233  uint32 chkpnt_nxtmxoff;
234  uint32 chkpnt_oldstMulti;
235  uint32 chkpnt_oldstxid;
236  uint32 align;
237  uint32 blocksz;
238  uint32 largesz;
239  uint32 walsz;
240  uint32 walseg;
241  uint32 ident;
242  uint32 index;
243  uint32 toast;
244  uint32 large_object;
245  bool date_is_int;
246  bool float8_pass_by_value;
247  uint32 data_checksum_version;
248 } ControlData;
249 
250 /*
251  * Enumeration to denote transfer modes
252  */
253 typedef enum
254 {
255  TRANSFER_MODE_CLONE,
256  TRANSFER_MODE_COPY,
257  TRANSFER_MODE_COPY_FILE_RANGE,
258  TRANSFER_MODE_LINK,
259 } transferMode;
260 
261 /*
262  * Enumeration to denote pg_log modes
263  */
264 typedef enum
265 {
266  PG_VERBOSE,
267  PG_STATUS, /* these messages do not get a newline added */
268  PG_REPORT_NONL, /* these too */
269  PG_REPORT,
270  PG_WARNING,
271  PG_FATAL,
272 } eLogType;
273 
274 
275 /*
276  * cluster
277  *
278  * information about each cluster
279  */
280 typedef struct
281 {
282  ControlData controldata; /* pg_control information */
283  DbLocaleInfo *template0; /* template0 locale info */
284  DbInfoArr dbarr; /* dbinfos array */
285  char *pgdata; /* pathname for cluster's $PGDATA directory */
286  char *pgconfig; /* pathname for cluster's config file
287  * directory */
288  char *bindir; /* pathname for cluster's executable directory */
289  char *pgopts; /* options to pass to the server, like pg_ctl
290  * -o */
291  char *sockdir; /* directory for Unix Domain socket, if any */
292  unsigned short port; /* port number where postmaster is waiting */
293  uint32 major_version; /* PG_VERSION of cluster */
294  char major_version_str[64]; /* string PG_VERSION of cluster */
295  uint32 bin_version; /* version returned from pg_ctl */
296  const char *tablespace_suffix; /* directory specification */
297  int nsubs; /* number of subscriptions */
298 } ClusterInfo;
299 
300 
301 /*
302  * LogOpts
303 */
304 typedef struct
305 {
306  FILE *internal; /* internal log FILE */
307  bool verbose; /* true -> be verbose in messages */
308  bool retain; /* retain log files on success */
309  /* Set of internal directories for output files */
310  char *rootdir; /* Root directory, aka pg_upgrade_output.d */
311  char *basedir; /* Base output directory, with timestamp */
312  char *dumpdir; /* Dumps */
313  char *logdir; /* Log files */
314  bool isatty; /* is stdout a tty */
315 } LogOpts;
316 
317 
318 /*
319  * UserOpts
320 */
321 typedef struct
322 {
323  bool check; /* check clusters only, don't change any data */
324  bool live_check; /* check clusters only, old server is running */
325  bool do_sync; /* flush changes to disk */
326  transferMode transfer_mode; /* copy files or link them? */
327  int jobs; /* number of processes/threads to use */
328  char *socketdir; /* directory to use for Unix sockets */
329  char *sync_method;
330 } UserOpts;
331 
332 typedef struct
333 {
334  char *name;
335  int dbnum;
336 } LibraryInfo;
337 
338 /*
339  * OSInfo
340  */
341 typedef struct
342 {
343  const char *progname; /* complete pathname for this program */
344  char *user; /* username for clusters */
345  bool user_specified; /* user specified on command-line */
346  char **old_tablespaces; /* tablespaces */
347  int num_old_tablespaces;
348  LibraryInfo *libraries; /* loadable libraries */
349  int num_libraries;
350  ClusterInfo *running_cluster;
351 } OSInfo;
352 
353 
354 /* Function signature for data type check version hook */
355 typedef bool (*DataTypesUsageVersionCheck) (ClusterInfo *cluster);
356 
357 /*
358  * Global variables
359  */
360 extern LogOpts log_opts;
361 extern UserOpts user_opts;
362 extern ClusterInfo old_cluster,
363  new_cluster;
364 extern OSInfo os_info;
365 
366 
367 /* check.c */
368 
369 void output_check_banner(void);
370 void check_and_dump_old_cluster(void);
371 void check_new_cluster(void);
372 void report_clusters_compatible(void);
373 void issue_warnings_and_set_wal_level(void);
374 void output_completion_banner(char *deletion_script_file_name);
375 void check_cluster_versions(void);
376 void check_cluster_compatibility(void);
377 void create_script_for_old_cluster_deletion(char **deletion_script_file_name);
378 
379 
380 /* controldata.c */
381 
382 void get_control_data(ClusterInfo *cluster);
383 void check_control_data(ControlData *oldctrl, ControlData *newctrl);
384 void disable_old_cluster(void);
385 
386 
387 /* dump.c */
388 
389 void generate_old_dump(void);
390 
391 
392 /* exec.c */
393 
394 #define EXEC_PSQL_ARGS "--echo-queries --set ON_ERROR_STOP=on --no-psqlrc --dbname=template1"
395 
396 bool exec_prog(const char *log_filename, const char *opt_log_file,
397  bool report_error, bool exit_on_error, const char *fmt,...) pg_attribute_printf(5, 6);
398 void verify_directories(void);
399 bool pid_lock_file_exists(const char *datadir);
400 
401 
402 /* file.c */
403 
404 void cloneFile(const char *src, const char *dst,
405  const char *schemaName, const char *relName);
406 void copyFile(const char *src, const char *dst,
407  const char *schemaName, const char *relName);
408 void copyFileByRange(const char *src, const char *dst,
409  const char *schemaName, const char *relName);
410 void linkFile(const char *src, const char *dst,
411  const char *schemaName, const char *relName);
412 void rewriteVisibilityMap(const char *fromfile, const char *tofile,
413  const char *schemaName, const char *relName);
414 void check_file_clone(void);
415 void check_copy_file_range(void);
416 void check_hard_link(void);
417 
418 /* fopen_priv() is no longer different from fopen() */
419 #define fopen_priv(path, mode) fopen(path, mode)
420 
421 /* function.c */
422 
423 void get_loadable_libraries(void);
424 void check_loadable_libraries(void);
425 
426 /* info.c */
427 
428 FileNameMap *gen_db_file_maps(DbInfo *old_db,
429  DbInfo *new_db, int *nmaps, const char *old_pgdata,
430  const char *new_pgdata);
431 void get_db_rel_and_slot_infos(ClusterInfo *cluster);
432 int count_old_cluster_logical_slots(void);
433 void get_subscription_count(ClusterInfo *cluster);
434 
435 /* option.c */
436 
437 void parseCommandLine(int argc, char *argv[]);
438 void adjust_data_dir(ClusterInfo *cluster);
439 void get_sock_dir(ClusterInfo *cluster);
440 
441 /* relfilenumber.c */
442 
443 void transfer_all_new_tablespaces(DbInfoArr *old_db_arr,
444  DbInfoArr *new_db_arr, char *old_pgdata, char *new_pgdata);
445 void transfer_all_new_dbs(DbInfoArr *old_db_arr,
446  DbInfoArr *new_db_arr, char *old_pgdata, char *new_pgdata,
447  char *old_tablespace);
448 
449 /* tablespace.c */
450 
451 void init_tablespaces(void);
452 
453 
454 /* server.c */
455 
456 PGconn *connectToServer(ClusterInfo *cluster, const char *db_name);
457 PGresult *executeQueryOrDie(PGconn *conn, const char *fmt,...) pg_attribute_printf(2, 3);
458 
459 char *cluster_conn_opts(ClusterInfo *cluster);
460 
461 bool start_postmaster(ClusterInfo *cluster, bool report_and_exit_on_error);
462 void stop_postmaster(bool in_atexit);
463 uint32 get_major_server_version(ClusterInfo *cluster);
464 void check_pghost_envvar(void);
465 
466 
467 /* util.c */
468 
469 char *quote_identifier(const char *s);
470 int get_user_info(char **user_name_p);
471 void check_ok(void);
472 void report_status(eLogType type, const char *fmt,...) pg_attribute_printf(2, 3);
473 void pg_log(eLogType type, const char *fmt,...) pg_attribute_printf(2, 3);
474 void pg_fatal(const char *fmt,...) pg_attribute_printf(1, 2) pg_attribute_noreturn();
475 void end_progress_output(void);
476 void cleanup_output_dirs(void);
477 void prep_status(const char *fmt,...) pg_attribute_printf(1, 2);
478 void prep_status_progress(const char *fmt,...) pg_attribute_printf(1, 2);
479 unsigned int str2uint(const char *str);
480 
481 
482 /* version.c */
483 
484 bool jsonb_9_4_check_applicable(ClusterInfo *cluster);
485 void old_9_6_invalidate_hash_indexes(ClusterInfo *cluster,
486  bool check_mode);
487 
488 void report_extension_updates(ClusterInfo *cluster);
489 
490 /* parallel.c */
491 void parallel_exec_prog(const char *log_file, const char *opt_log_file,
492  const char *fmt,...) pg_attribute_printf(3, 4);
493 void parallel_transfer_all_new_dbs(DbInfoArr *old_db_arr, DbInfoArr *new_db_arr,
494  char *old_pgdata, char *new_pgdata,
495  char *old_tablespace);
496 bool reap_child(bool wait_for_child);
497 
498 /* task.c */
499 
500 typedef void (*UpgradeTaskProcessCB) (DbInfo *dbinfo, PGresult *res, void *arg);
501 
502 /* struct definition is private to task.c */
503 typedef struct UpgradeTask UpgradeTask;
504 
505 UpgradeTask *upgrade_task_create(void);
506 void upgrade_task_add_step(UpgradeTask *task, const char *query,
507  UpgradeTaskProcessCB process_cb, bool free_result,
508  void *arg);
509 void upgrade_task_run(const UpgradeTask *task, const ClusterInfo *cluster);
510 void upgrade_task_free(UpgradeTask *task);
511 
512 /* convenient type for common private data needed by several tasks */
513 typedef struct
514 {
515  FILE *file;
516  char path[MAXPGPATH];
517 } UpgradeTaskReport;
char * output_files[]
Definition: pg_upgrade.c:71