Age Owner TLA Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * pg_basebackup.c - receive a base backup using streaming replication protocol
4 : *
5 : * Author: Magnus Hagander <magnus@hagander.net>
6 : *
7 : * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
8 : *
9 : * IDENTIFICATION
10 : * src/bin/pg_basebackup/pg_basebackup.c
11 : *-------------------------------------------------------------------------
12 : */
13 :
14 : #include "postgres_fe.h"
15 :
16 : #include <unistd.h>
17 : #include <dirent.h>
18 : #include <limits.h>
19 : #include <sys/select.h>
20 : #include <sys/stat.h>
21 : #include <sys/wait.h>
22 : #include <signal.h>
23 : #include <time.h>
24 : #ifdef HAVE_LIBZ
25 : #include <zlib.h>
26 : #endif
27 :
28 : #include "access/xlog_internal.h"
29 : #include "backup/basebackup.h"
30 : #include "bbstreamer.h"
31 : #include "common/compression.h"
32 : #include "common/file_perm.h"
33 : #include "common/file_utils.h"
34 : #include "common/logging.h"
35 : #include "fe_utils/option_utils.h"
36 : #include "fe_utils/recovery_gen.h"
37 : #include "getopt_long.h"
38 : #include "receivelog.h"
39 : #include "streamutil.h"
40 :
41 : #define ERRCODE_DATA_CORRUPTED "XX001"
42 :
43 : typedef struct TablespaceListCell
44 : {
45 : struct TablespaceListCell *next;
46 : char old_dir[MAXPGPATH];
47 : char new_dir[MAXPGPATH];
48 : } TablespaceListCell;
49 :
50 : typedef struct TablespaceList
51 : {
52 : TablespaceListCell *head;
53 : TablespaceListCell *tail;
54 : } TablespaceList;
55 :
56 : typedef struct ArchiveStreamState
57 : {
58 : int tablespacenum;
59 : pg_compress_specification *compress;
60 : bbstreamer *streamer;
61 : bbstreamer *manifest_inject_streamer;
62 : PQExpBuffer manifest_buffer;
63 : char manifest_filename[MAXPGPATH];
64 : FILE *manifest_file;
65 : } ArchiveStreamState;
66 :
67 : typedef struct WriteTarState
68 : {
69 : int tablespacenum;
70 : bbstreamer *streamer;
71 : } WriteTarState;
72 :
73 : typedef struct WriteManifestState
74 : {
75 : char filename[MAXPGPATH];
76 : FILE *file;
77 : } WriteManifestState;
78 :
79 : typedef void (*WriteDataCallback) (size_t nbytes, char *buf,
80 : void *callback_data);
81 :
82 : /*
83 : * pg_xlog has been renamed to pg_wal in version 10. This version number
84 : * should be compared with PQserverVersion().
85 : */
86 : #define MINIMUM_VERSION_FOR_PG_WAL 100000
87 :
88 : /*
89 : * Temporary replication slots are supported from version 10.
90 : */
91 : #define MINIMUM_VERSION_FOR_TEMP_SLOTS 100000
92 :
93 : /*
94 : * Backup manifests are supported from version 13.
95 : */
96 : #define MINIMUM_VERSION_FOR_MANIFESTS 130000
97 :
98 : /*
99 : * Before v15, tar files received from the server will be improperly
100 : * terminated.
101 : */
102 : #define MINIMUM_VERSION_FOR_TERMINATED_TARFILE 150000
103 :
104 : /*
105 : * Different ways to include WAL
106 : */
107 : typedef enum
108 : {
109 : NO_WAL,
110 : FETCH_WAL,
111 : STREAM_WAL
112 : } IncludeWal;
113 :
114 : /*
115 : * Different places to perform compression
116 : */
117 : typedef enum
118 : {
119 : COMPRESS_LOCATION_UNSPECIFIED,
120 : COMPRESS_LOCATION_CLIENT,
121 : COMPRESS_LOCATION_SERVER
122 : } CompressionLocation;
123 :
124 : /* Global options */
125 : static char *basedir = NULL;
126 : static TablespaceList tablespace_dirs = {NULL, NULL};
127 : static char *xlog_dir = NULL;
128 : static char format = '\0'; /* p(lain)/t(ar) */
129 : static char *label = "pg_basebackup base backup";
130 : static bool noclean = false;
131 : static bool checksum_failure = false;
132 : static bool showprogress = false;
133 : static bool estimatesize = true;
134 : static int verbose = 0;
135 : static IncludeWal includewal = STREAM_WAL;
136 : static bool fastcheckpoint = false;
137 : static bool writerecoveryconf = false;
138 : static bool do_sync = true;
139 : static int standby_message_timeout = 10 * 1000; /* 10 sec = default */
140 : static pg_time_t last_progress_report = 0;
141 : static int32 maxrate = 0; /* no limit by default */
142 : static char *replication_slot = NULL;
143 : static bool temp_replication_slot = true;
144 : static char *backup_target = NULL;
145 : static bool create_slot = false;
146 : static bool no_slot = false;
147 : static bool verify_checksums = true;
148 : static bool manifest = true;
149 : static bool manifest_force_encode = false;
150 : static char *manifest_checksums = NULL;
151 :
152 : static bool success = false;
153 : static bool made_new_pgdata = false;
154 : static bool found_existing_pgdata = false;
155 : static bool made_new_xlogdir = false;
156 : static bool found_existing_xlogdir = false;
157 : static bool made_tablespace_dirs = false;
158 : static bool found_tablespace_dirs = false;
159 :
160 : /* Progress indicators */
161 : static uint64 totalsize_kb;
162 : static uint64 totaldone;
163 : static int tablespacecount;
164 : static char *progress_filename = NULL;
165 :
166 : /* Pipe to communicate with background wal receiver process */
167 : #ifndef WIN32
168 : static int bgpipe[2] = {-1, -1};
169 : #endif
170 :
171 : /* Handle to child process */
172 : static pid_t bgchild = -1;
173 : static bool in_log_streamer = false;
174 :
175 : /* Flag to indicate if child process exited unexpectedly */
176 : static volatile sig_atomic_t bgchild_exited = false;
177 :
178 : /* End position for xlog streaming, empty string if unknown yet */
179 : static XLogRecPtr xlogendptr;
180 :
181 : #ifndef WIN32
182 : static int has_xlogendptr = 0;
183 : #else
184 : static volatile LONG has_xlogendptr = 0;
185 : #endif
186 :
187 : /* Contents of configuration file to be generated */
188 : static PQExpBuffer recoveryconfcontents = NULL;
189 :
190 : /* Function headers */
191 : static void usage(void);
192 : static void verify_dir_is_empty_or_create(char *dirname, bool *created, bool *found);
193 : static void progress_update_filename(const char *filename);
194 : static void progress_report(int tablespacenum, bool force, bool finished);
195 :
196 : static bbstreamer *CreateBackupStreamer(char *archive_name, char *spclocation,
197 : bbstreamer **manifest_inject_streamer_p,
198 : bool is_recovery_guc_supported,
199 : bool expect_unterminated_tarfile,
200 : pg_compress_specification *compress);
201 : static void ReceiveArchiveStreamChunk(size_t r, char *copybuf,
202 : void *callback_data);
203 : static char GetCopyDataByte(size_t r, char *copybuf, size_t *cursor);
204 : static char *GetCopyDataString(size_t r, char *copybuf, size_t *cursor);
205 : static uint64 GetCopyDataUInt64(size_t r, char *copybuf, size_t *cursor);
206 : static void GetCopyDataEnd(size_t r, char *copybuf, size_t cursor);
207 : static void ReportCopyDataParseError(size_t r, char *copybuf);
208 : static void ReceiveTarFile(PGconn *conn, char *archive_name, char *spclocation,
209 : bool tablespacenum, pg_compress_specification *compress);
210 : static void ReceiveTarCopyChunk(size_t r, char *copybuf, void *callback_data);
211 : static void ReceiveBackupManifest(PGconn *conn);
212 : static void ReceiveBackupManifestChunk(size_t r, char *copybuf,
213 : void *callback_data);
214 : static void ReceiveBackupManifestInMemory(PGconn *conn, PQExpBuffer buf);
215 : static void ReceiveBackupManifestInMemoryChunk(size_t r, char *copybuf,
216 : void *callback_data);
217 : static void BaseBackup(char *compression_algorithm, char *compression_detail,
218 : CompressionLocation compressloc,
219 : pg_compress_specification *client_compress);
220 :
221 : static bool reached_end_position(XLogRecPtr segendpos, uint32 timeline,
222 : bool segment_finished);
223 :
224 : static const char *get_tablespace_mapping(const char *dir);
225 : static void tablespace_list_append(const char *arg);
226 :
3346 magnus 227 ECB :
228 : static void
2400 peter_e 229 CBC 268 : cleanup_directories_atexit(void)
2400 peter_e 230 ECB : {
2400 peter_e 231 GIC 268 : if (success || in_log_streamer)
2400 peter_e 232 CBC 211 : return;
233 :
1832 magnus 234 57 : if (!noclean && !checksum_failure)
235 : {
2400 peter_e 236 53 : if (made_new_pgdata)
2400 peter_e 237 ECB : {
1469 peter 238 GBC 17 : pg_log_info("removing data directory \"%s\"", basedir);
2400 peter_e 239 GIC 17 : if (!rmtree(basedir, true))
1469 peter 240 LBC 0 : pg_log_error("failed to remove data directory");
241 : }
2400 peter_e 242 GBC 36 : else if (found_existing_pgdata)
2400 peter_e 243 EUB : {
1469 peter 244 UBC 0 : pg_log_info("removing contents of data directory \"%s\"", basedir);
2400 peter_e 245 UIC 0 : if (!rmtree(basedir, false))
1469 peter 246 0 : pg_log_error("failed to remove contents of data directory");
2400 peter_e 247 ECB : }
248 :
2400 peter_e 249 GBC 53 : if (made_new_xlogdir)
2400 peter_e 250 EUB : {
1469 peter 251 UBC 0 : pg_log_info("removing WAL directory \"%s\"", xlog_dir);
2400 peter_e 252 UIC 0 : if (!rmtree(xlog_dir, true))
1469 peter 253 LBC 0 : pg_log_error("failed to remove WAL directory");
254 : }
2400 peter_e 255 GBC 53 : else if (found_existing_xlogdir)
2400 peter_e 256 EUB : {
1469 peter 257 UBC 0 : pg_log_info("removing contents of WAL directory \"%s\"", xlog_dir);
2400 peter_e 258 UIC 0 : if (!rmtree(xlog_dir, false))
1469 peter 259 0 : pg_log_error("failed to remove contents of WAL directory");
260 : }
261 : }
2400 peter_e 262 ECB : else
2400 peter_e 263 EUB : {
1832 magnus 264 GIC 4 : if ((made_new_pgdata || found_existing_pgdata) && !checksum_failure)
1469 peter 265 LBC 0 : pg_log_info("data directory \"%s\" not removed at user's request", basedir);
2400 peter_e 266 EUB :
2400 peter_e 267 GIC 4 : if (made_new_xlogdir || found_existing_xlogdir)
1469 peter 268 UIC 0 : pg_log_info("WAL directory \"%s\" not removed at user's request", xlog_dir);
2400 peter_e 269 ECB : }
2400 peter_e 270 EUB :
1832 magnus 271 GIC 57 : if ((made_tablespace_dirs || found_tablespace_dirs) && !checksum_failure)
1469 peter 272 UIC 0 : pg_log_info("changes to tablespace directories will not be undone");
273 : }
2400 peter_e 274 ECB :
275 : static void
1562 peter 276 CBC 236 : disconnect_atexit(void)
3346 magnus 277 ECB : {
3346 magnus 278 CBC 236 : if (conn != NULL)
3346 magnus 279 GIC 119 : PQfinish(conn);
1562 peter 280 236 : }
281 :
282 : #ifndef WIN32
283 : /*
284 : * If the bgchild exits prematurely and raises a SIGCHLD signal, we can abort
285 : * processing rather than wait until the backup has finished and error out at
286 : * that time. On Windows, we use a background thread which can communicate
287 : * without the need for a signal handler.
410 dgustafsson 288 ECB : */
289 : static void
410 dgustafsson 290 CBC 96 : sigchld_handler(SIGNAL_ARGS)
410 dgustafsson 291 ECB : {
410 dgustafsson 292 GIC 96 : bgchild_exited = true;
293 96 : }
294 :
295 : /*
296 : * On windows, our background thread dies along with the process. But on
297 : * Unix, if we have started a subprocess, we want to kill it off so it
298 : * doesn't remain running trying to stream data.
1562 peter 299 ECB : */
300 : static void
1562 peter 301 CBC 98 : kill_bgchild_atexit(void)
1562 peter 302 ECB : {
410 dgustafsson 303 CBC 98 : if (bgchild > 0 && !bgchild_exited)
3346 magnus 304 GIC 4 : kill(bgchild, SIGTERM);
305 98 : }
306 : #endif
307 :
308 : /*
309 : * Split argument into old_dir and new_dir and append to tablespace mapping
310 : * list.
3333 peter_e 311 ECB : */
312 : static void
3333 peter_e 313 CBC 19 : tablespace_list_append(const char *arg)
314 : {
3333 peter_e 315 GIC 19 : TablespaceListCell *cell = (TablespaceListCell *) pg_malloc0(sizeof(TablespaceListCell));
316 : char *dst;
317 : char *dst_ptr;
3260 bruce 318 ECB : const char *arg_ptr;
3333 peter_e 319 :
3333 peter_e 320 GIC 19 : dst_ptr = dst = cell->old_dir;
3333 peter_e 321 CBC 634 : for (arg_ptr = arg; *arg_ptr; arg_ptr++)
3333 peter_e 322 EUB : {
3333 peter_e 323 GIC 616 : if (dst_ptr - dst >= MAXPGPATH)
366 tgl 324 LBC 0 : pg_fatal("directory name too long");
325 :
3333 peter_e 326 CBC 616 : if (*arg_ptr == '\\' && *(arg_ptr + 1) == '=')
327 : ; /* skip backslash escaping = */
328 614 : else if (*arg_ptr == '=' && (arg_ptr == arg || *(arg_ptr - 1) != '\\'))
3333 peter_e 329 ECB : {
3333 peter_e 330 GIC 19 : if (*cell->new_dir)
366 tgl 331 CBC 1 : pg_fatal("multiple \"=\" signs in tablespace mapping");
332 : else
3333 peter_e 333 GIC 18 : dst = dst_ptr = cell->new_dir;
3333 peter_e 334 ECB : }
335 : else
3333 peter_e 336 GIC 595 : *dst_ptr++ = *arg_ptr;
3333 peter_e 337 ECB : }
338 :
3333 peter_e 339 GIC 18 : if (!*cell->old_dir || !*cell->new_dir)
366 tgl 340 3 : pg_fatal("invalid tablespace mapping format \"%s\", must be \"OLDDIR=NEWDIR\"", arg);
341 :
342 : /*
343 : * All tablespaces are created with absolute directories, so specifying a
344 : * non-absolute path here would just never match, possibly confusing users.
345 : * Since we don't know whether the remote side is Windows or not, and it
346 : * might be different than the local side, permit any path that could be
347 : * absolute under either set of rules.
348 : *
349 : * (There is little practical risk of confusion here, because someone
350 : * running entirely on Linux isn't likely to have a relative path that
351 : * begins with a backslash or something that looks like a drive
352 : * specification. If they do, and they also incorrectly believe that
353 : * a relative path is acceptable here, we'll silently fail to warn them
354 : * of their mistake, and the -T option will just not get applied, same
170 rhaas 355 ECB : * as if they'd specified -T for a nonexistent tablespace.)
3260 bruce 356 : */
170 rhaas 357 CBC 15 : if (!is_nonwindows_absolute_path(cell->old_dir) &&
170 rhaas 358 GIC 1 : !is_windows_absolute_path(cell->old_dir))
366 tgl 359 1 : pg_fatal("old directory is not an absolute path in tablespace mapping: %s",
366 tgl 360 ECB : cell->old_dir);
3333 peter_e 361 :
3333 peter_e 362 GIC 14 : if (!is_absolute_path(cell->new_dir))
366 tgl 363 1 : pg_fatal("new directory is not an absolute path in tablespace mapping: %s",
364 : cell->new_dir);
365 :
366 : /*
367 : * Comparisons done with these values should involve similarly
368 : * canonicalized path values. This is particularly sensitive on Windows
1985 peter_e 369 ECB : * where path values may not necessarily use Unix slashes.
370 : */
2903 bruce 371 GIC 13 : canonicalize_path(cell->old_dir);
2903 bruce 372 CBC 13 : canonicalize_path(cell->new_dir);
2903 bruce 373 EUB :
3333 peter_e 374 GIC 13 : if (tablespace_dirs.tail)
3333 peter_e 375 LBC 0 : tablespace_dirs.tail->next = cell;
3333 peter_e 376 ECB : else
3333 peter_e 377 CBC 13 : tablespace_dirs.head = cell;
3333 peter_e 378 GIC 13 : tablespace_dirs.tail = cell;
379 13 : }
380 :
3333 peter_e 381 ECB :
382 : static void
4459 magnus 383 CBC 1 : usage(void)
384 : {
4358 peter_e 385 1 : printf(_("%s takes a base backup of a running PostgreSQL server.\n\n"),
4459 magnus 386 ECB : progname);
4459 magnus 387 CBC 1 : printf(_("Usage:\n"));
388 1 : printf(_(" %s [OPTION]...\n"), progname);
389 1 : printf(_("\nOptions controlling the output:\n"));
3904 alvherre 390 1 : printf(_(" -D, --pgdata=DIRECTORY receive base backup into directory\n"));
3904 alvherre 391 GIC 1 : printf(_(" -F, --format=p|t output format (plain (default), tar)\n"));
2153 tgl 392 CBC 1 : printf(_(" -r, --max-rate=RATE maximum transfer rate to transfer data directory\n"
393 : " (in kB/s, or use suffix \"k\" or \"M\")\n"));
394 1 : printf(_(" -R, --write-recovery-conf\n"
395 : " write configuration for replication\n"));
363 peter 396 1 : printf(_(" -t, --target=TARGET[:DETAIL]\n"
397 : " backup target (if other than client)\n"));
2153 tgl 398 1 : printf(_(" -T, --tablespace-mapping=OLDDIR=NEWDIR\n"
2118 tgl 399 ECB : " relocate tablespace in OLDDIR to NEWDIR\n"));
2021 peter_e 400 GIC 1 : printf(_(" --waldir=WALDIR location for the write-ahead log directory\n"));
2153 tgl 401 CBC 1 : printf(_(" -X, --wal-method=none|fetch|stream\n"
2153 tgl 402 ECB : " include required WAL files with specified method\n"));
3904 alvherre 403 GIC 1 : printf(_(" -z, --gzip compress tar output\n"));
382 rhaas 404 CBC 1 : printf(_(" -Z, --compress=[{client|server}-]METHOD[:DETAIL]\n"
382 rhaas 405 ECB : " compress on client or server as specified\n"));
398 rhaas 406 CBC 1 : printf(_(" -Z, --compress=none do not compress tar output\n"));
4459 magnus 407 GIC 1 : printf(_("\nGeneral options:\n"));
2153 tgl 408 CBC 1 : printf(_(" -c, --checkpoint=fast|spread\n"
2153 tgl 409 ECB : " set fast or spread checkpointing\n"));
2021 peter_e 410 CBC 1 : printf(_(" -C, --create-slot create replication slot\n"));
3904 alvherre 411 1 : printf(_(" -l, --label=LABEL set backup label\n"));
2363 peter_e 412 1 : printf(_(" -n, --no-clean do not clean up after errors\n"));
413 1 : printf(_(" -N, --no-sync do not wait for changes to be written safely to disk\n"));
3904 alvherre 414 1 : printf(_(" -P, --progress show progress information\n"));
2021 peter_e 415 1 : printf(_(" -S, --slot=SLOTNAME replication slot to use\n"));
3904 alvherre 416 1 : printf(_(" -v, --verbose output verbose messages\n"));
3904 alvherre 417 GIC 1 : printf(_(" -V, --version output version information, then exit\n"));
1073 peter 418 CBC 1 : printf(_(" --manifest-checksums=SHA{224,256,384,512}|CRC32C|NONE\n"
419 : " use algorithm for manifest checksums\n"));
420 1 : printf(_(" --manifest-force-encode\n"
1073 peter 421 ECB : " hex encode all file names in manifest\n"));
1073 peter 422 CBC 1 : printf(_(" --no-estimate-size do not estimate backup size in server side\n"));
423 1 : printf(_(" --no-manifest suppress generation of backup manifest\n"));
1784 peter_e 424 GIC 1 : printf(_(" --no-slot prevent creation of temporary replication slot\n"));
1784 peter_e 425 CBC 1 : printf(_(" --no-verify-checksums\n"
1784 peter_e 426 ECB : " do not verify checksums\n"));
3904 alvherre 427 CBC 1 : printf(_(" -?, --help show this help, then exit\n"));
4459 magnus 428 1 : printf(_("\nConnection options:\n"));
3695 heikki.linnakangas 429 1 : printf(_(" -d, --dbname=CONNSTR connection string\n"));
3904 alvherre 430 1 : printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
3904 alvherre 431 GIC 1 : printf(_(" -p, --port=PORT database server port number\n"));
2153 tgl 432 CBC 1 : printf(_(" -s, --status-interval=INTERVAL\n"
2153 tgl 433 ECB : " time between status packets sent to server (in seconds)\n"));
3904 alvherre 434 CBC 1 : printf(_(" -U, --username=NAME connect as specified database user\n"));
435 1 : printf(_(" -w, --no-password never prompt for password\n"));
436 1 : printf(_(" -W, --password force password prompt (should happen automatically)\n"));
1136 peter 437 1 : printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
1136 peter 438 GIC 1 : printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
4459 magnus 439 1 : }
440 :
441 :
442 : /*
443 : * Called in the background process every time data is received.
444 : * On Unix, we check to see if there is any data on our pipe
445 : * (which would mean we have a stop position), and if it is, check if
446 : * it is time to stop.
447 : * On Windows, we are in a single process, so we can just check if it's
448 : * time to stop.
4183 magnus 449 ECB : */
450 : static bool
3904 alvherre 451 GIC 10313 : reached_end_position(XLogRecPtr segendpos, uint32 timeline,
3904 alvherre 452 ECB : bool segment_finished)
453 : {
4183 magnus 454 GIC 10313 : if (!has_xlogendptr)
455 : {
4183 magnus 456 ECB : #ifndef WIN32
457 : fd_set fds;
267 peter 458 GNC 10221 : struct timeval tv = {0};
459 : int r;
460 :
461 : /*
462 : * Don't have the end pointer yet - check our pipe to see if it has
4183 magnus 463 ECB : * been sent yet.
464 : */
4183 magnus 465 GIC 173757 : FD_ZERO(&fds);
4183 magnus 466 CBC 10221 : FD_SET(bgpipe[0], &fds);
4183 magnus 467 ECB :
4183 magnus 468 GIC 10221 : r = select(bgpipe[0] + 1, &fds, NULL, NULL, &tv);
469 10221 : if (r == 1)
470 : {
267 peter 471 GNC 91 : char xlogend[64] = {0};
3941 heikki.linnakangas 472 ECB : uint32 hi,
3941 heikki.linnakangas 473 EUB : lo;
474 :
3260 bruce 475 GBC 91 : r = read(bgpipe[0], xlogend, sizeof(xlogend) - 1);
4183 magnus 476 GIC 91 : if (r < 0)
366 tgl 477 LBC 0 : pg_fatal("could not read from ready pipe: %m");
4183 magnus 478 ECB :
3941 heikki.linnakangas 479 GIC 91 : if (sscanf(xlogend, "%X/%X", &hi, &lo) != 2)
366 tgl 480 UIC 0 : pg_fatal("could not parse write-ahead log location \"%s\"",
481 : xlogend);
3941 heikki.linnakangas 482 GIC 91 : xlogendptr = ((uint64) hi) << 32 | lo;
4183 magnus 483 91 : has_xlogendptr = 1;
484 :
485 : /*
486 : * Fall through to check if we've reached the point further
487 : * already.
488 : */
489 : }
490 : else
4183 magnus 491 ECB : {
492 : /*
493 : * No data received on the pipe means we don't know the end
494 : * position yet - so just say it's not time to stop yet.
495 : */
4183 magnus 496 GIC 10130 : return false;
497 : }
498 : #else
499 :
500 : /*
501 : * On win32, has_xlogendptr is set by the main thread, so if it's not
502 : * set here, we just go back and wait until it shows up.
503 : */
504 : return false;
505 : #endif
506 : }
4183 magnus 507 ECB :
508 : /*
509 : * At this point we have an end pointer, so compare it to the current
510 : * position to figure out if it's time to stop.
511 : */
3941 heikki.linnakangas 512 GIC 183 : if (segendpos >= xlogendptr)
4183 magnus 513 182 : return true;
4183 magnus 514 ECB :
515 : /*
516 : * Have end pointer, but haven't reached it yet - so tell the caller to
517 : * keep streaming.
518 : */
4183 magnus 519 GIC 1 : return false;
520 : }
521 :
522 : typedef struct
523 : {
524 : PGconn *bgconn;
525 : XLogRecPtr startptr;
526 : char xlog[MAXPGPATH]; /* directory or tarfile depending on mode */
527 : char *sysidentifier;
528 : int timeline;
362 michael 529 ECB : pg_compress_algorithm wal_compress_algorithm;
530 : int wal_compress_level;
3955 bruce 531 : } logstreamer_param;
532 :
4183 magnus 533 : static int
382 rhaas 534 GIC 94 : LogStreamerMain(logstreamer_param *param)
4183 magnus 535 ECB : {
267 peter 536 GNC 94 : StreamCtl stream = {0};
2585 magnus 537 ECB :
2400 peter_e 538 CBC 94 : in_log_streamer = true;
539 :
2585 magnus 540 GIC 94 : stream.startpos = param->startptr;
541 94 : stream.timeline = param->timeline;
542 94 : stream.sysidentifier = param->sysidentifier;
2585 magnus 543 CBC 94 : stream.stream_stop = reached_end_position;
2173 tgl 544 ECB : #ifndef WIN32
2173 tgl 545 GIC 94 : stream.stop_socket = bgpipe[0];
2173 tgl 546 ECB : #else
547 : stream.stop_socket = PGINVALID_SOCKET;
548 : #endif
2585 magnus 549 CBC 94 : stream.standby_message_timeout = standby_message_timeout;
550 94 : stream.synchronous = false;
1313 michael 551 ECB : /* fsync happens at the end of pg_basebackup for all data */
1313 michael 552 GIC 94 : stream.do_sync = false;
2585 magnus 553 CBC 94 : stream.mark_done = true;
2585 magnus 554 GIC 94 : stream.partial_suffix = NULL;
2274 magnus 555 CBC 94 : stream.replication_slot = replication_slot;
2359 magnus 556 GIC 94 : if (format == 'p')
521 michael 557 87 : stream.walmethod = CreateWalDirectoryMethod(param->xlog,
362 michael 558 ECB : PG_COMPRESSION_NONE, 0,
1313 michael 559 GIC 87 : stream.do_sync);
422 rhaas 560 ECB : else
422 rhaas 561 GIC 7 : stream.walmethod = CreateWalTarMethod(param->xlog,
562 : param->wal_compress_algorithm,
563 : param->wal_compress_level,
564 7 : stream.do_sync);
565 :
2585 magnus 566 94 : if (!ReceiveXlogStream(param->bgconn, &stream))
567 : {
568 : /*
569 : * Any errors will already have been reported in the function process,
570 : * but we need to tell the parent that we didn't shutdown in a nice
571 : * way.
572 : */
573 : #ifdef WIN32
410 dgustafsson 574 ECB : /*
575 : * In order to signal the main thread of an ungraceful exit we set the
576 : * same flag that we use on Unix to signal SIGCHLD.
577 : */
578 : bgchild_exited = true;
410 dgustafsson 579 EUB : #endif
4183 magnus 580 GIC 3 : return 1;
581 : }
582 :
202 rhaas 583 GNC 91 : if (!stream.walmethod->ops->finish(stream.walmethod))
584 : {
1469 peter 585 UIC 0 : pg_log_error("could not finish writing WAL files: %m");
410 dgustafsson 586 ECB : #ifdef WIN32
587 : bgchild_exited = true;
588 : #endif
2359 magnus 589 UIC 0 : return 1;
2359 magnus 590 ECB : }
591 :
4183 magnus 592 GIC 91 : PQfinish(param->bgconn);
593 :
202 rhaas 594 GNC 91 : stream.walmethod->ops->free(stream.walmethod);
2357 magnus 595 ECB :
4183 magnus 596 GIC 91 : return 0;
597 : }
598 :
599 : /*
600 : * Initiate background process for receiving xlog during the backup.
601 : * The background stream will use its own database connection so we can
602 : * stream the logfile in parallel with the backups.
603 : */
4183 magnus 604 ECB : static void
382 rhaas 605 CBC 99 : StartLogStreamer(char *startpos, uint32 timeline, char *sysidentifier,
362 michael 606 ECB : pg_compress_algorithm wal_compress_algorithm,
382 rhaas 607 : int wal_compress_level)
4183 magnus 608 : {
609 : logstreamer_param *param;
610 : uint32 hi,
3941 heikki.linnakangas 611 : lo;
3018 andres 612 EUB : char statusdir[MAXPGPATH];
613 :
3841 tgl 614 CBC 99 : param = pg_malloc0(sizeof(logstreamer_param));
4183 magnus 615 GIC 99 : param->timeline = timeline;
4183 magnus 616 CBC 99 : param->sysidentifier = sysidentifier;
362 michael 617 GIC 99 : param->wal_compress_algorithm = wal_compress_algorithm;
382 rhaas 618 99 : param->wal_compress_level = wal_compress_level;
619 :
4183 magnus 620 ECB : /* Convert the starting position */
3941 heikki.linnakangas 621 GBC 99 : if (sscanf(startpos, "%X/%X", &hi, &lo) != 2)
366 tgl 622 UIC 0 : pg_fatal("could not parse write-ahead log location \"%s\"",
623 : startpos);
3941 heikki.linnakangas 624 GIC 99 : param->startptr = ((uint64) hi) << 32 | lo;
4183 magnus 625 ECB : /* Round off to even segment position */
2028 andres 626 CBC 99 : param->startptr -= XLogSegmentOffset(param->startptr, WalSegSz);
627 :
4183 magnus 628 EUB : #ifndef WIN32
629 : /* Create our background pipe */
4029 andrew 630 GIC 99 : if (pipe(bgpipe) < 0)
366 tgl 631 LBC 0 : pg_fatal("could not create pipe for background process: %m");
632 : #endif
4183 magnus 633 ECB :
634 : /* Get a second connection */
4183 magnus 635 GIC 99 : param->bgconn = GetConnection();
3969 636 99 : if (!param->bgconn)
3969 magnus 637 ECB : /* Error message already written in GetConnection() */
3969 magnus 638 UBC 0 : exit(1);
639 :
640 : /* In post-10 cluster, pg_xlog has been renamed to pg_wal */
2359 magnus 641 GIC 99 : snprintf(param->xlog, sizeof(param->xlog), "%s/%s",
642 : basedir,
2362 rhaas 643 CBC 99 : PQserverVersion(conn) < MINIMUM_VERSION_FOR_PG_WAL ?
2153 bruce 644 ECB : "pg_xlog" : "pg_wal");
3018 andres 645 :
646 : /* Temporary replication slots are only supported in 10 and newer */
2274 magnus 647 CBC 99 : if (PQserverVersion(conn) < MINIMUM_VERSION_FOR_TEMP_SLOTS)
2021 peter_e 648 UIC 0 : temp_replication_slot = false;
2021 peter_e 649 ECB :
650 : /*
651 : * Create replication slot if requested
652 : */
2021 peter_e 653 GBC 99 : if (temp_replication_slot && !replication_slot)
654 92 : replication_slot = psprintf("pg_basebackup_%d", (int) PQbackendPID(param->bgconn));
2021 peter_e 655 GIC 99 : if (temp_replication_slot || create_slot)
656 : {
2021 peter_e 657 GBC 94 : if (!CreateReplicationSlot(param->bgconn, replication_slot, NULL,
658 : temp_replication_slot, true, true, false, false))
1562 peter 659 GIC 1 : exit(1);
660 :
2021 peter_e 661 93 : if (verbose)
2021 peter_e 662 ECB : {
2021 peter_e 663 UIC 0 : if (temp_replication_slot)
1469 peter 664 0 : pg_log_info("created temporary replication slot \"%s\"",
665 : replication_slot);
666 : else
667 0 : pg_log_info("created replication slot \"%s\"",
668 : replication_slot);
669 : }
2021 peter_e 670 ECB : }
671 :
2359 magnus 672 CBC 98 : if (format == 'p')
673 : {
674 : /*
2359 magnus 675 ECB : * Create pg_wal/archive_status or pg_xlog/archive_status (and thus
2153 bruce 676 EUB : * pg_wal or pg_xlog) depending on the target server so we can write
677 : * to basedir/pg_wal or basedir/pg_xlog as the directory entry in the
678 : * tar file may arrive later.
679 : */
2359 magnus 680 GIC 90 : snprintf(statusdir, sizeof(statusdir), "%s/%s/archive_status",
681 : basedir,
682 90 : PQserverVersion(conn) < MINIMUM_VERSION_FOR_PG_WAL ?
683 : "pg_xlog" : "pg_wal");
2359 magnus 684 ECB :
1828 sfrost 685 CBC 90 : if (pg_mkdir_p(statusdir, pg_dir_create_mode) != 0 && errno != EEXIST)
366 tgl 686 UIC 0 : pg_fatal("could not create directory \"%s\": %m", statusdir);
687 : }
4183 magnus 688 ECB :
689 : /*
690 : * Start a child process and tell it to start streaming. On Unix, this is
4183 magnus 691 EUB : * a fork(). On Windows, we create a thread.
692 : */
693 : #ifndef WIN32
4183 magnus 694 GIC 98 : bgchild = fork();
695 192 : if (bgchild == 0)
4183 magnus 696 ECB : {
697 : /* in child process */
278 andres 698 GIC 94 : exit(LogStreamerMain(param));
699 : }
4183 magnus 700 98 : else if (bgchild < 0)
366 tgl 701 UIC 0 : pg_fatal("could not create background process: %m");
4183 magnus 702 ECB :
703 : /*
704 : * Else we are in the parent process and all is well.
705 : */
1562 peter 706 GIC 98 : atexit(kill_bgchild_atexit);
707 : #else /* WIN32 */
708 : bgchild = _beginthreadex(NULL, 0, (void *) LogStreamerMain, param, 0, NULL);
709 : if (bgchild == 0)
366 tgl 710 ECB : pg_fatal("could not create background thread: %m");
711 : #endif
4183 magnus 712 CBC 98 : }
713 :
4459 magnus 714 ECB : /*
715 : * Verify that the given directory exists and is empty. If it does not
716 : * exist, it is created. If it exists but is not empty, an error will
717 : * be given and the process ended.
718 : */
719 : static void
2400 peter_e 720 GBC 142 : verify_dir_is_empty_or_create(char *dirname, bool *created, bool *found)
4459 magnus 721 ECB : {
4459 magnus 722 CBC 142 : switch (pg_check_dir(dirname))
4459 magnus 723 ECB : {
4459 magnus 724 CBC 130 : case 0:
725 :
726 : /*
727 : * Does not exist, so create
728 : */
1828 sfrost 729 130 : if (pg_mkdir_p(dirname, pg_dir_create_mode) == -1)
366 tgl 730 LBC 0 : pg_fatal("could not create directory \"%s\": %m", dirname);
2400 peter_e 731 CBC 130 : if (created)
732 130 : *created = true;
4459 magnus 733 GIC 130 : return;
734 11 : case 1:
735 :
736 : /*
737 : * Exists, empty
738 : */
2400 peter_e 739 CBC 11 : if (found)
2400 peter_e 740 GBC 11 : *found = true;
4459 magnus 741 GIC 11 : return;
742 1 : case 2:
743 : case 3:
744 : case 4:
4459 magnus 745 EUB :
746 : /*
747 : * Exists, not empty
748 : */
366 tgl 749 GIC 1 : pg_fatal("directory \"%s\" exists but is not empty", dirname);
4459 magnus 750 UIC 0 : case -1:
751 :
752 : /*
753 : * Access problem
754 : */
366 tgl 755 LBC 0 : pg_fatal("could not access directory \"%s\": %m", dirname);
756 : }
757 : }
4459 magnus 758 ECB :
759 : /*
520 rhaas 760 EUB : * Callback to update our notion of the current filename.
416 tgl 761 : *
762 : * No other code should modify progress_filename!
763 : */
520 rhaas 764 : static void
520 rhaas 765 GIC 98801 : progress_update_filename(const char *filename)
520 rhaas 766 ECB : {
767 : /* We needn't maintain this variable if not doing verbose reports. */
416 tgl 768 GIC 98801 : if (showprogress && verbose)
769 : {
297 peter 770 UNC 0 : free(progress_filename);
416 tgl 771 UIC 0 : if (filename)
772 0 : progress_filename = pg_strdup(filename);
773 : else
774 0 : progress_filename = NULL;
775 : }
520 rhaas 776 GIC 98801 : }
777 :
4459 magnus 778 ECB : /*
779 : * Print a progress report based on the global variables. If verbose output
780 : * is enabled, also print the current file name.
781 : *
782 : * Progress report is written at maximum once per second, unless the force
783 : * parameter is set to true.
784 : *
965 heikki.linnakangas 785 : * If finished is set to true, this is the last progress report. The cursor
786 : * is moved to the next line.
787 : */
4459 magnus 788 EUB : static void
520 rhaas 789 GBC 172 : progress_report(int tablespacenum, bool force, bool finished)
4459 magnus 790 EUB : {
791 : int percent;
4254 peter_e 792 : char totaldone_str[32];
793 : char totalsize_str[32];
794 : pg_time_t now;
795 :
3346 magnus 796 GIC 172 : if (!showprogress)
797 172 : return;
798 :
3346 magnus 799 UIC 0 : now = time(NULL);
965 heikki.linnakangas 800 0 : if (now == last_progress_report && !force && !finished)
3260 bruce 801 UBC 0 : return; /* Max once per second */
3346 magnus 802 EUB :
3346 magnus 803 UBC 0 : last_progress_report = now;
1314 peter 804 0 : percent = totalsize_kb ? (int) ((totaldone / 1024) * 100 / totalsize_kb) : 0;
805 :
4254 magnus 806 EUB : /*
807 : * Avoid overflowing past 100% or the full size. This may make the total
4183 bruce 808 : * size number change as we approach the end of the backup (the estimate
809 : * will always be wrong if WAL is included), but that's better than having
810 : * the done column be bigger than the total.
4254 magnus 811 : */
4452 magnus 812 UIC 0 : if (percent > 100)
4452 magnus 813 UBC 0 : percent = 100;
1314 peter 814 UIC 0 : if (totaldone / 1024 > totalsize_kb)
815 0 : totalsize_kb = totaldone / 1024;
816 :
571 817 0 : snprintf(totaldone_str, sizeof(totaldone_str), UINT64_FORMAT,
818 : totaldone / 1024);
571 peter 819 UBC 0 : snprintf(totalsize_str, sizeof(totalsize_str), UINT64_FORMAT, totalsize_kb);
4254 peter_e 820 EUB :
821 : #define VERBOSE_FILENAME_LENGTH 35
4459 magnus 822 UIC 0 : if (verbose)
4404 magnus 823 EUB : {
520 rhaas 824 UIC 0 : if (!progress_filename)
825 :
826 : /*
827 : * No filename given, so clear the status line (used for last
828 : * call)
4404 magnus 829 EUB : */
4404 magnus 830 UIC 0 : fprintf(stderr,
3734 magnus 831 UBC 0 : ngettext("%*s/%s kB (100%%), %d/%d tablespace %*s",
3734 magnus 832 EUB : "%*s/%s kB (100%%), %d/%d tablespaces %*s",
833 : tablespacecount),
3734 magnus 834 UIC 0 : (int) strlen(totalsize_str),
3904 alvherre 835 EUB : totaldone_str, totalsize_str,
836 : tablespacenum, tablespacecount,
837 : VERBOSE_FILENAME_LENGTH + 5, "");
838 : else
839 : {
520 rhaas 840 UIC 0 : bool truncate = (strlen(progress_filename) > VERBOSE_FILENAME_LENGTH);
841 :
4404 magnus 842 0 : fprintf(stderr,
3734 magnus 843 UBC 0 : ngettext("%*s/%s kB (%d%%), %d/%d tablespace (%s%-*.*s)",
844 : "%*s/%s kB (%d%%), %d/%d tablespaces (%s%-*.*s)",
845 : tablespacecount),
3734 magnus 846 UIC 0 : (int) strlen(totalsize_str),
3904 alvherre 847 EUB : totaldone_str, totalsize_str, percent,
3734 magnus 848 : tablespacenum, tablespacecount,
849 : /* Prefix with "..." if we do leading truncation */
850 : truncate ? "..." : "",
2118 tgl 851 : truncate ? VERBOSE_FILENAME_LENGTH - 3 : VERBOSE_FILENAME_LENGTH,
852 : truncate ? VERBOSE_FILENAME_LENGTH - 3 : VERBOSE_FILENAME_LENGTH,
853 : /* Truncate filename at beginning if it's too long */
520 rhaas 854 UIC 0 : truncate ? progress_filename + strlen(progress_filename) - VERBOSE_FILENAME_LENGTH + 3 : progress_filename);
855 : }
856 : }
857 : else
4254 peter_e 858 0 : fprintf(stderr,
3734 magnus 859 UBC 0 : ngettext("%*s/%s kB (%d%%), %d/%d tablespace",
860 : "%*s/%s kB (%d%%), %d/%d tablespaces",
861 : tablespacecount),
3734 magnus 862 UIC 0 : (int) strlen(totalsize_str),
3904 alvherre 863 ECB : totaldone_str, totalsize_str, percent,
864 : tablespacenum, tablespacecount);
865 :
866 : /*
965 heikki.linnakangas 867 : * Stay on the same line if reporting to a terminal and we're not done
868 : * yet.
869 : */
964 heikki.linnakangas 870 LBC 0 : fputc((!finished && isatty(fileno(stderr))) ? '\r' : '\n', stderr);
4459 magnus 871 ECB : }
4459 magnus 872 EUB :
3328 alvherre 873 ECB : static int32
3328 alvherre 874 GBC 1 : parse_max_rate(char *src)
875 : {
3328 alvherre 876 ECB : double result;
877 : char *after_num;
3260 bruce 878 GIC 1 : char *suffix = NULL;
879 :
3328 alvherre 880 1 : errno = 0;
3328 alvherre 881 GBC 1 : result = strtod(src, &after_num);
3328 alvherre 882 GIC 1 : if (src == after_num)
366 tgl 883 UIC 0 : pg_fatal("transfer rate \"%s\" is not a valid value", src);
3328 alvherre 884 GIC 1 : if (errno != 0)
366 tgl 885 UIC 0 : pg_fatal("invalid transfer rate \"%s\": %m", src);
886 :
3328 alvherre 887 GIC 1 : if (result <= 0)
3328 alvherre 888 ECB : {
3328 alvherre 889 EUB : /*
890 : * Reject obviously wrong values here.
3328 alvherre 891 ECB : */
366 tgl 892 UIC 0 : pg_fatal("transfer rate must be greater than zero");
3328 alvherre 893 EUB : }
894 :
895 : /*
896 : * Evaluate suffix, after skipping over possible whitespace. Lack of
3260 bruce 897 : * suffix means kilobytes.
898 : */
3328 alvherre 899 GBC 1 : while (*after_num != '\0' && isspace((unsigned char) *after_num))
3328 alvherre 900 UIC 0 : after_num++;
3328 alvherre 901 EUB :
3328 alvherre 902 GBC 1 : if (*after_num != '\0')
903 : {
3328 alvherre 904 UIC 0 : suffix = after_num;
905 0 : if (*after_num == 'k')
906 : {
3328 alvherre 907 ECB : /* kilobyte is the expected unit. */
3328 alvherre 908 UBC 0 : after_num++;
909 : }
3328 alvherre 910 LBC 0 : else if (*after_num == 'M')
3328 alvherre 911 EUB : {
3328 alvherre 912 UIC 0 : after_num++;
913 0 : result *= 1024.0;
3328 alvherre 914 ECB : }
3328 alvherre 915 EUB : }
916 :
917 : /* The rest can only consist of white space. */
3328 alvherre 918 GIC 1 : while (*after_num != '\0' && isspace((unsigned char) *after_num))
3328 alvherre 919 UIC 0 : after_num++;
920 :
3328 alvherre 921 CBC 1 : if (*after_num != '\0')
366 tgl 922 UBC 0 : pg_fatal("invalid --max-rate unit: \"%s\"", suffix);
923 :
3328 alvherre 924 ECB : /* Valid integer? */
3328 alvherre 925 GIC 1 : if ((uint64) result != (uint64) ((uint32) result))
366 tgl 926 UIC 0 : pg_fatal("transfer rate \"%s\" exceeds integer range", src);
927 :
928 : /*
929 : * The range is checked on the server side too, but avoid the server
930 : * connection if a nonsensical value was passed.
931 : */
3328 alvherre 932 GIC 1 : if (result < MAX_RATE_LOWER || result > MAX_RATE_UPPER)
366 tgl 933 UIC 0 : pg_fatal("transfer rate \"%s\" is out of range", src);
934 :
3328 alvherre 935 GIC 1 : return (int32) result;
936 : }
937 :
938 : /*
939 : * Basic parsing of a value specified for -Z/--compress.
940 : *
941 : * We're not concerned here with understanding exactly what behavior the
942 : * user wants, but we do need to know whether the user is requesting client
943 : * or server side compression or leaving it unspecified, and we need to
944 : * separate the name of the compression algorithm from the detail string.
945 : *
946 : * For instance, if the user writes --compress client-lz4:6, we want to
947 : * separate that into (a) client-side compression, (b) algorithm "lz4",
382 rhaas 948 ECB : * and (c) detail "6". Note, however, that all the client/server prefix is
949 : * optional, and so is the detail. The algorithm name is required, unless
950 : * the whole string is an integer, in which case we assume "gzip" as the
951 : * algorithm and use the integer as the detail.
952 : *
953 : * We're not concerned with validation at this stage, so if the user writes
954 : * --compress client-turkey:sandwich, the requested algorithm is "turkey"
955 : * and the detail string is "sandwich". We'll sort out whether that's legal
956 : * at a later stage.
443 michael 957 : */
958 : static void
130 michael 959 GNC 37 : backup_parse_compress_options(char *option, char **algorithm, char **detail,
960 : CompressionLocation *locationres)
443 michael 961 ECB : {
436 rhaas 962 : /*
963 : * Strip off any "client-" or "server-" prefix, calculating the location.
443 michael 964 : */
382 rhaas 965 GIC 37 : if (strncmp(option, "server-", 7) == 0)
966 : {
440 rhaas 967 CBC 18 : *locationres = COMPRESS_LOCATION_SERVER;
382 968 18 : option += 7;
440 rhaas 969 EUB : }
382 rhaas 970 GIC 19 : else if (strncmp(option, "client-", 7) == 0)
422 rhaas 971 ECB : {
422 rhaas 972 GIC 5 : *locationres = COMPRESS_LOCATION_CLIENT;
382 973 5 : option += 7;
974 : }
443 michael 975 ECB : else
440 rhaas 976 GIC 14 : *locationres = COMPRESS_LOCATION_UNSPECIFIED;
977 :
978 : /* fallback to the common parsing for the algorithm and detail */
130 michael 979 GNC 37 : parse_compress_options(option, algorithm, detail);
443 michael 980 GIC 37 : }
981 :
982 : /*
983 : * Read a stream of COPY data and invoke the provided callback for each
984 : * chunk.
985 : */
986 : static void
1221 rhaas 987 124 : ReceiveCopyData(PGconn *conn, WriteDataCallback callback,
988 : void *callback_data)
1221 rhaas 989 ECB : {
990 : PGresult *res;
991 :
992 : /* Get the COPY data stream. */
1221 rhaas 993 GIC 124 : res = PQgetResult(conn);
994 124 : if (PQresultStatus(res) != PGRES_COPY_OUT)
366 tgl 995 LBC 0 : pg_fatal("could not get COPY data stream: %s",
366 tgl 996 ECB : PQerrorMessage(conn));
1221 rhaas 997 GIC 124 : PQclear(res);
998 :
999 : /* Loop over chunks until done. */
1000 : while (1)
1001 246055 : {
1002 : int r;
1003 : char *copybuf;
1221 rhaas 1004 ECB :
1221 rhaas 1005 GIC 246179 : r = PQgetCopyData(conn, ©buf, 0);
1006 246179 : if (r == -1)
1007 : {
1008 : /* End of chunk. */
1009 121 : break;
1010 : }
1221 rhaas 1011 CBC 246058 : else if (r == -2)
366 tgl 1012 UIC 0 : pg_fatal("could not read COPY data: %s",
1013 : PQerrorMessage(conn));
1221 rhaas 1014 ECB :
410 dgustafsson 1015 CBC 246058 : if (bgchild_exited)
366 tgl 1016 GIC 3 : pg_fatal("background process terminated unexpectedly");
1017 :
1221 rhaas 1018 CBC 246055 : (*callback) (r, copybuf, callback_data);
1221 rhaas 1019 ECB :
1221 rhaas 1020 GIC 246055 : PQfreemem(copybuf);
1021 : }
1221 rhaas 1022 CBC 121 : }
1221 rhaas 1023 ECB :
1024 : /*
1025 : * Figure out what to do with an archive received from the server based on
520 1026 : * the options selected by the user. We may just write the results directly
1027 : * to a file, or we might compress first, or we might extract the tar file
1028 : * and write each member separately. This function doesn't do any of that
1029 : * directly, but it works out what kind of bbstreamer we need to create so
1030 : * that the right stuff happens when, down the road, we actually receive
1031 : * the data.
1032 : */
1033 : static bbstreamer *
520 rhaas 1034 GIC 129 : CreateBackupStreamer(char *archive_name, char *spclocation,
1035 : bbstreamer **manifest_inject_streamer_p,
1036 : bool is_recovery_guc_supported,
1037 : bool expect_unterminated_tarfile,
1038 : pg_compress_specification *compress)
1039 : {
443 michael 1040 CBC 129 : bbstreamer *streamer = NULL;
520 rhaas 1041 GIC 129 : bbstreamer *manifest_inject_streamer = NULL;
520 rhaas 1042 EUB : bool inject_manifest;
436 1043 : bool is_tar,
1044 : is_tar_gz,
398 1045 : is_tar_lz4,
1046 : is_tar_zstd,
1047 : is_compressed_tar;
1048 : bool must_parse_archive;
440 rhaas 1049 GIC 129 : int archive_name_len = strlen(archive_name);
1050 :
1051 : /*
1052 : * Normally, we emit the backup manifest as a separate file, but when
520 rhaas 1053 ECB : * we're writing a tarfile to stdout, we don't have that option, so
1054 : * include it in the one tarfile we've got.
1055 : */
520 rhaas 1056 GIC 129 : inject_manifest = (format == 't' && strcmp(basedir, "-") == 0 && manifest);
4459 magnus 1057 ECB :
1058 : /* Is this a tar archive? */
440 rhaas 1059 GBC 258 : is_tar = (archive_name_len > 4 &&
1060 129 : strcmp(archive_name + archive_name_len - 4, ".tar") == 0);
440 rhaas 1061 EUB :
394 1062 : /* Is this a .tar.gz archive? */
394 rhaas 1063 GBC 258 : is_tar_gz = (archive_name_len > 7 &&
1064 129 : strcmp(archive_name + archive_name_len - 7, ".tar.gz") == 0);
436 rhaas 1065 EUB :
394 1066 : /* Is this a .tar.lz4 archive? */
422 rhaas 1067 GBC 148 : is_tar_lz4 = (archive_name_len > 8 &&
394 rhaas 1068 GIC 19 : strcmp(archive_name + archive_name_len - 8, ".tar.lz4") == 0);
1069 :
394 rhaas 1070 ECB : /* Is this a .tar.zst archive? */
398 rhaas 1071 GIC 148 : is_tar_zstd = (archive_name_len > 8 &&
394 1072 19 : strcmp(archive_name + archive_name_len - 8, ".tar.zst") == 0);
1073 :
1074 : /* Is this any kind of compressed tar? */
1075 129 : is_compressed_tar = is_tar_gz || is_tar_lz4 || is_tar_zstd;
1076 :
1077 : /*
1078 : * Injecting the manifest into a compressed tar file would be possible if
1079 : * we decompressed it, parsed the tarfile, generated a new tarfile, and
1080 : * recompressed it, but compressing and decompressing multiple times just
394 rhaas 1081 ECB : * to inject the manifest seems inefficient enough that it's probably not
1082 : * what the user wants. So, instead, reject the request and tell the user
1083 : * to specify something more reasonable.
1084 : */
394 rhaas 1085 GIC 129 : if (inject_manifest && is_compressed_tar)
1086 : {
197 peter 1087 UIC 0 : pg_log_error("cannot inject manifest into a compressed tar file");
1088 0 : pg_log_error_hint("Use client-side compression, send the output to a directory rather than standard output, or use %s.",
1089 : "--no-manifest");
394 rhaas 1090 0 : exit(1);
1091 : }
1092 :
1093 : /*
1094 : * We have to parse the archive if (1) we're suppose to extract it, or if
1095 : * (2) we need to inject backup_manifest or recovery configuration into
1096 : * it. However, we only know how to parse tar archives.
1097 : */
520 rhaas 1098 CBC 143 : must_parse_archive = (format == 'p' || inject_manifest ||
332 tgl 1099 GIC 14 : (spclocation == NULL && writerecoveryconf));
1493 michael 1100 EUB :
440 rhaas 1101 : /* At present, we only know how to parse tar archives. */
394 rhaas 1102 GIC 129 : if (must_parse_archive && !is_tar && !is_compressed_tar)
1103 : {
197 peter 1104 UIC 0 : pg_log_error("cannot parse archive \"%s\"", archive_name);
366 tgl 1105 LBC 0 : pg_log_error_detail("Only tar archives can be parsed.");
440 rhaas 1106 UIC 0 : if (format == 'p')
366 tgl 1107 LBC 0 : pg_log_error_detail("Plain format requires pg_basebackup to parse the archive.");
440 rhaas 1108 UIC 0 : if (inject_manifest)
366 tgl 1109 0 : pg_log_error_detail("Using - as the output directory requires pg_basebackup to parse the archive.");
440 rhaas 1110 LBC 0 : if (writerecoveryconf)
366 tgl 1111 0 : pg_log_error_detail("The -R option requires pg_basebackup to parse the archive.");
440 rhaas 1112 UIC 0 : exit(1);
440 rhaas 1113 ECB : }
1114 :
520 rhaas 1115 CBC 129 : if (format == 'p')
3904 alvherre 1116 ECB : {
1117 : const char *directory;
1118 :
4459 magnus 1119 : /*
1120 : * In plain format, we must extract the archive. The data for the main
520 rhaas 1121 : * tablespace will be written to the base directory, and the data for
1122 : * other tablespaces will be written to the directory where they're
1123 : * located on the server, after applying any user-specified tablespace
1124 : * mappings.
1125 : */
520 rhaas 1126 CBC 113 : directory = spclocation == NULL ? basedir
520 rhaas 1127 GIC 113 : : get_tablespace_mapping(spclocation);
520 rhaas 1128 CBC 113 : streamer = bbstreamer_extractor_new(directory,
520 rhaas 1129 ECB : get_tablespace_mapping,
1130 : progress_update_filename);
3904 alvherre 1131 : }
1132 : else
1133 : {
1134 : FILE *archive_file;
520 rhaas 1135 EUB : char archive_filename[MAXPGPATH];
1136 :
1137 : /*
1138 : * In tar format, we just write the archive without extracting it.
1139 : * Normally, we write it to the archive name provided by the caller,
1140 : * but when the base directory is "-" that means we need to write to
1141 : * standard output.
1142 : */
520 rhaas 1143 GIC 16 : if (strcmp(basedir, "-") == 0)
4459 magnus 1144 ECB : {
520 rhaas 1145 UBC 0 : snprintf(archive_filename, sizeof(archive_filename), "-");
520 rhaas 1146 LBC 0 : archive_file = stdout;
1147 : }
1148 : else
1149 : {
520 rhaas 1150 GIC 16 : snprintf(archive_filename, sizeof(archive_filename),
1151 : "%s/%s", basedir, archive_name);
1152 16 : archive_file = NULL;
1153 : }
4459 magnus 1154 ECB :
362 michael 1155 GBC 16 : if (compress->algorithm == PG_COMPRESSION_NONE)
443 michael 1156 GIC 8 : streamer = bbstreamer_plain_writer_new(archive_filename,
1157 : archive_file);
362 1158 8 : else if (compress->algorithm == PG_COMPRESSION_GZIP)
1159 : {
520 rhaas 1160 4 : strlcat(archive_filename, ".gz", sizeof(archive_filename));
520 rhaas 1161 CBC 4 : streamer = bbstreamer_gzip_writer_new(archive_filename,
1162 : archive_file, compress);
4459 magnus 1163 ECB : }
362 michael 1164 CBC 4 : else if (compress->algorithm == PG_COMPRESSION_LZ4)
1165 : {
422 rhaas 1166 GIC 1 : strlcat(archive_filename, ".lz4", sizeof(archive_filename));
1167 1 : streamer = bbstreamer_plain_writer_new(archive_filename,
1168 : archive_file);
382 1169 1 : streamer = bbstreamer_lz4_compressor_new(streamer, compress);
1170 : }
362 michael 1171 3 : else if (compress->algorithm == PG_COMPRESSION_ZSTD)
1172 : {
398 rhaas 1173 3 : strlcat(archive_filename, ".zst", sizeof(archive_filename));
1174 3 : streamer = bbstreamer_plain_writer_new(archive_filename,
398 rhaas 1175 ECB : archive_file);
382 rhaas 1176 CBC 3 : streamer = bbstreamer_zstd_compressor_new(streamer, compress);
398 rhaas 1177 ECB : }
443 michael 1178 EUB : else
1179 : {
443 michael 1180 UIC 0 : Assert(false); /* not reachable */
1181 : }
1182 :
1183 : /*
520 rhaas 1184 ECB : * If we need to parse the archive for whatever reason, then we'll
1185 : * also need to re-archive, because, if the output format is tar, the
1186 : * only point of parsing the archive is to be able to inject stuff
1187 : * into it.
1188 : */
520 rhaas 1189 CBC 16 : if (must_parse_archive)
520 rhaas 1190 LBC 0 : streamer = bbstreamer_tar_archiver_new(streamer);
416 tgl 1191 CBC 16 : progress_update_filename(archive_filename);
1192 : }
1193 :
1194 : /*
332 tgl 1195 ECB : * If we're supposed to inject the backup manifest into the results, it
1196 : * should be done here, so that the file content can be injected directly,
1197 : * without worrying about the details of the tar format.
1198 : */
520 rhaas 1199 GIC 129 : if (inject_manifest)
520 rhaas 1200 UIC 0 : manifest_inject_streamer = streamer;
1201 :
1202 : /*
1203 : * If this is the main tablespace and we're supposed to write recovery
332 tgl 1204 ECB : * information, arrange to do that.
1205 : */
520 rhaas 1206 GIC 129 : if (spclocation == NULL && writerecoveryconf)
1207 : {
1208 2 : Assert(must_parse_archive);
520 rhaas 1209 CBC 2 : streamer = bbstreamer_recovery_injector_new(streamer,
520 rhaas 1210 ECB : is_recovery_guc_supported,
1211 : recoveryconfcontents);
1212 : }
1213 :
1214 : /*
1215 : * If we're doing anything that involves understanding the contents of the
1216 : * archive, we'll need to parse it. If not, we can skip parsing it, but
332 tgl 1217 : * old versions of the server send improperly terminated tarfiles, so if
1218 : * we're talking to such a server we'll need to add the terminator here.
520 rhaas 1219 : */
520 rhaas 1220 CBC 129 : if (must_parse_archive)
520 rhaas 1221 GIC 113 : streamer = bbstreamer_tar_parser_new(streamer);
516 1222 16 : else if (expect_unterminated_tarfile)
517 rhaas 1223 UIC 0 : streamer = bbstreamer_tar_terminator_new(streamer);
1224 :
1225 : /*
1226 : * If the user has requested a server compressed archive along with
332 tgl 1227 ECB : * archive extraction at client then we need to decompress it.
436 rhaas 1228 EUB : */
382 rhaas 1229 GIC 129 : if (format == 'p')
422 rhaas 1230 EUB : {
382 rhaas 1231 GIC 113 : if (is_tar_gz)
422 rhaas 1232 GBC 1 : streamer = bbstreamer_gzip_decompressor_new(streamer);
382 1233 112 : else if (is_tar_lz4)
422 1234 1 : streamer = bbstreamer_lz4_decompressor_new(streamer);
382 1235 111 : else if (is_tar_zstd)
398 rhaas 1236 GIC 2 : streamer = bbstreamer_zstd_decompressor_new(streamer);
1237 : }
1238 :
520 rhaas 1239 ECB : /* Return the results. */
520 rhaas 1240 GIC 129 : *manifest_inject_streamer_p = manifest_inject_streamer;
520 rhaas 1241 CBC 129 : return streamer;
520 rhaas 1242 ECB : }
4459 magnus 1243 :
1244 : /*
446 rhaas 1245 : * Receive all of the archives the server wants to send - and the backup
1246 : * manifest if present - as a single COPY stream.
1247 : */
1248 : static void
362 michael 1249 GIC 124 : ReceiveArchiveStream(PGconn *conn, pg_compress_specification *compress)
1250 : {
1251 : ArchiveStreamState state;
446 rhaas 1252 ECB :
1253 : /* Set up initial state. */
446 rhaas 1254 CBC 124 : memset(&state, 0, sizeof(state));
1255 124 : state.tablespacenum = -1;
382 rhaas 1256 GIC 124 : state.compress = compress;
1257 :
446 rhaas 1258 ECB : /* All the real work happens in ReceiveArchiveStreamChunk. */
446 rhaas 1259 GIC 124 : ReceiveCopyData(conn, ReceiveArchiveStreamChunk, &state);
446 rhaas 1260 ECB :
1261 : /* If we wrote the backup manifest to a file, close the file. */
446 rhaas 1262 GIC 121 : if (state.manifest_file !=NULL)
1263 : {
1264 109 : fclose(state.manifest_file);
1265 109 : state.manifest_file = NULL;
1266 : }
1267 :
1268 : /*
1269 : * If we buffered the backup manifest in order to inject it into the
1270 : * output tarfile, do that now.
446 rhaas 1271 ECB : */
446 rhaas 1272 CBC 121 : if (state.manifest_inject_streamer != NULL &&
446 rhaas 1273 UIC 0 : state.manifest_buffer != NULL)
1274 : {
446 rhaas 1275 LBC 0 : bbstreamer_inject_file(state.manifest_inject_streamer,
446 rhaas 1276 ECB : "backup_manifest",
446 rhaas 1277 UBC 0 : state.manifest_buffer->data,
446 rhaas 1278 UIC 0 : state.manifest_buffer->len);
1279 0 : destroyPQExpBuffer(state.manifest_buffer);
446 rhaas 1280 LBC 0 : state.manifest_buffer = NULL;
446 rhaas 1281 ECB : }
1282 :
1283 : /* If there's still an archive in progress, end processing. */
446 rhaas 1284 GIC 121 : if (state.streamer != NULL)
1285 : {
1286 111 : bbstreamer_finalize(state.streamer);
1287 111 : bbstreamer_free(state.streamer);
1288 111 : state.streamer = NULL;
446 rhaas 1289 ECB : }
446 rhaas 1290 CBC 121 : }
446 rhaas 1291 ECB :
446 rhaas 1292 EUB : /*
1293 : * Receive one chunk of data sent by the server as part of a single COPY
1294 : * stream that includes all archives and the manifest.
1295 : */
1296 : static void
446 rhaas 1297 GIC 246055 : ReceiveArchiveStreamChunk(size_t r, char *copybuf, void *callback_data)
1298 : {
1299 246055 : ArchiveStreamState *state = callback_data;
446 rhaas 1300 CBC 246055 : size_t cursor = 0;
446 rhaas 1301 ECB :
1302 : /* Each CopyData message begins with a type byte. */
446 rhaas 1303 GIC 246055 : switch (GetCopyDataByte(r, copybuf, &cursor))
446 rhaas 1304 ECB : {
446 rhaas 1305 GIC 139 : case 'n':
446 rhaas 1306 ECB : {
1307 : /* New archive. */
1308 : char *archive_name;
1309 : char *spclocation;
1310 :
1311 : /*
1312 : * We force a progress report at the end of each tablespace. A
1313 : * new tablespace starts when the previous one ends, except in
1314 : * the case of the very first one.
1315 : */
446 rhaas 1316 CBC 139 : if (++state->tablespacenum > 0)
446 rhaas 1317 GIC 15 : progress_report(state->tablespacenum, true, false);
1318 :
1319 : /* Sanity check. */
1320 139 : if (state->manifest_buffer != NULL ||
1321 139 : state->manifest_file !=NULL)
197 peter 1322 LBC 0 : pg_fatal("archives must precede manifest");
446 rhaas 1323 ECB :
1324 : /* Parse the rest of the CopyData message. */
446 rhaas 1325 GIC 139 : archive_name = GetCopyDataString(r, copybuf, &cursor);
1326 139 : spclocation = GetCopyDataString(r, copybuf, &cursor);
1327 139 : GetCopyDataEnd(r, copybuf, cursor);
1328 :
446 rhaas 1329 ECB : /*
1330 : * Basic sanity checks on the archive name: it shouldn't be
1331 : * empty, it shouldn't start with a dot, and it shouldn't
1332 : * contain a path separator.
1333 : */
446 rhaas 1334 GIC 139 : if (archive_name[0] == '\0' || archive_name[0] == '.' ||
446 rhaas 1335 CBC 139 : strchr(archive_name, '/') != NULL ||
446 rhaas 1336 GIC 139 : strchr(archive_name, '\\') != NULL)
366 tgl 1337 UIC 0 : pg_fatal("invalid archive name: \"%s\"",
366 tgl 1338 EUB : archive_name);
1339 :
1340 : /*
446 rhaas 1341 ECB : * An empty spclocation is treated as NULL. We expect this
1342 : * case to occur for the data directory itself, but not for
1343 : * any archives that correspond to tablespaces.
1344 : */
446 rhaas 1345 GIC 139 : if (spclocation[0] == '\0')
1346 124 : spclocation = NULL;
1347 :
1348 : /* End processing of any prior archive. */
1349 139 : if (state->streamer != NULL)
1350 : {
446 rhaas 1351 GBC 15 : bbstreamer_finalize(state->streamer);
1352 15 : bbstreamer_free(state->streamer);
1353 15 : state->streamer = NULL;
1354 : }
1355 :
1356 : /*
509 rhaas 1357 ECB : * Create an appropriate backup streamer, unless a backup
1358 : * target was specified. In that case, it's up to the server
1359 : * to put the backup wherever it needs to go.
446 1360 : */
509 rhaas 1361 CBC 139 : if (backup_target == NULL)
1362 : {
1363 : /*
509 rhaas 1364 EUB : * We know that recovery GUCs are supported, because this
509 rhaas 1365 ECB : * protocol can only be used on v15+.
1366 : */
509 rhaas 1367 GIC 129 : state->streamer =
509 rhaas 1368 CBC 129 : CreateBackupStreamer(archive_name,
1369 : spclocation,
1370 : &state->manifest_inject_streamer,
1371 : true, false,
1372 : state->compress);
1373 : }
446 rhaas 1374 GIC 139 : break;
1375 : }
446 rhaas 1376 ECB :
446 rhaas 1377 CBC 245640 : case 'd':
1378 : {
1379 : /* Archive or manifest data. */
446 rhaas 1380 GIC 245640 : if (state->manifest_buffer != NULL)
1381 : {
1382 : /* Manifest data, buffer in memory. */
446 rhaas 1383 LBC 0 : appendPQExpBuffer(state->manifest_buffer, copybuf + 1,
446 rhaas 1384 ECB : r - 1);
1385 : }
446 rhaas 1386 GIC 245640 : else if (state->manifest_file !=NULL)
446 rhaas 1387 ECB : {
1388 : /* Manifest data, write to disk. */
446 rhaas 1389 GIC 557 : if (fwrite(copybuf + 1, r - 1, 1,
1390 : state->manifest_file) != 1)
1391 : {
1392 : /*
446 rhaas 1393 ECB : * If fwrite() didn't set errno, assume that the
1394 : * problem is that we're out of disk space.
1395 : */
446 rhaas 1396 UIC 0 : if (errno == 0)
1397 0 : errno = ENOSPC;
366 tgl 1398 0 : pg_fatal("could not write to file \"%s\": %m",
1399 : state->manifest_filename);
446 rhaas 1400 ECB : }
1401 : }
446 rhaas 1402 GIC 245083 : else if (state->streamer != NULL)
1403 : {
1404 : /* Archive data. */
1405 245083 : bbstreamer_content(state->streamer, NULL, copybuf + 1,
1406 245083 : r - 1, BBSTREAMER_UNKNOWN);
446 rhaas 1407 ECB : }
446 rhaas 1408 EUB : else
366 tgl 1409 UIC 0 : pg_fatal("unexpected payload data");
446 rhaas 1410 GIC 245640 : break;
446 rhaas 1411 ECB : }
1412 :
446 rhaas 1413 GIC 157 : case 'p':
446 rhaas 1414 ECB : {
1415 : /*
1416 : * Progress report.
446 rhaas 1417 EUB : *
1418 : * The remainder of the message is expected to be an 8-byte
1419 : * count of bytes completed.
1420 : */
446 rhaas 1421 CBC 157 : totaldone = GetCopyDataUInt64(r, copybuf, &cursor);
446 rhaas 1422 GIC 157 : GetCopyDataEnd(r, copybuf, cursor);
1423 :
446 rhaas 1424 EUB : /*
363 drowley 1425 : * The server shouldn't send progress report messages too
446 rhaas 1426 : * often, so we force an update each time we receive one.
1427 : */
446 rhaas 1428 CBC 157 : progress_report(state->tablespacenum, true, false);
446 rhaas 1429 GIC 157 : break;
1430 : }
1431 :
1432 119 : case 'm':
1433 : {
1434 : /*
1435 : * Manifest data will be sent next. This message is not
446 rhaas 1436 ECB : * expected to have any further payload data.
1437 : */
446 rhaas 1438 CBC 119 : GetCopyDataEnd(r, copybuf, cursor);
446 rhaas 1439 EUB :
1440 : /*
509 rhaas 1441 ECB : * If a backup target was specified, figuring out where to put
1442 : * the manifest is the server's problem. Otherwise, we need to
1443 : * deal with it.
1444 : */
509 rhaas 1445 GIC 119 : if (backup_target == NULL)
1446 : {
1447 : /*
1448 : * If we're supposed inject the manifest into the archive,
1449 : * we prepare to buffer it in memory; otherwise, we
509 rhaas 1450 ECB : * prepare to write it to a temporary file.
1451 : */
509 rhaas 1452 CBC 109 : if (state->manifest_inject_streamer != NULL)
509 rhaas 1453 LBC 0 : state->manifest_buffer = createPQExpBuffer();
1454 : else
1455 : {
509 rhaas 1456 GIC 109 : snprintf(state->manifest_filename,
509 rhaas 1457 ECB : sizeof(state->manifest_filename),
509 rhaas 1458 EUB : "%s/backup_manifest.tmp", basedir);
509 rhaas 1459 CBC 109 : state->manifest_file =
1460 109 : fopen(state->manifest_filename, "wb");
1461 109 : if (state->manifest_file == NULL)
366 tgl 1462 UIC 0 : pg_fatal("could not create file \"%s\": %m",
1463 : state->manifest_filename);
446 rhaas 1464 ECB : }
1465 : }
446 rhaas 1466 GIC 119 : break;
1467 : }
1468 :
446 rhaas 1469 UIC 0 : default:
1470 0 : ReportCopyDataParseError(r, copybuf);
1471 0 : break;
1472 : }
446 rhaas 1473 GIC 246055 : }
446 rhaas 1474 ECB :
1475 : /*
1476 : * Get a single byte from a CopyData message.
1477 : *
1478 : * Bail out if none remain.
446 rhaas 1479 EUB : */
446 rhaas 1480 ECB : static char
446 rhaas 1481 CBC 246055 : GetCopyDataByte(size_t r, char *copybuf, size_t *cursor)
446 rhaas 1482 ECB : {
446 rhaas 1483 GIC 246055 : if (*cursor >= r)
446 rhaas 1484 UIC 0 : ReportCopyDataParseError(r, copybuf);
1485 :
446 rhaas 1486 GIC 246055 : return copybuf[(*cursor)++];
1487 : }
1488 :
446 rhaas 1489 ECB : /*
1490 : * Get a NUL-terminated string from a CopyData message.
1491 : *
446 rhaas 1492 EUB : * Bail out if the terminating NUL cannot be found.
446 rhaas 1493 ECB : */
1494 : static char *
446 rhaas 1495 GIC 278 : GetCopyDataString(size_t r, char *copybuf, size_t *cursor)
1496 : {
1497 278 : size_t startpos = *cursor;
1498 278 : size_t endpos = startpos;
1499 :
1500 : while (1)
1501 : {
1502 1832 : if (endpos >= r)
446 rhaas 1503 UIC 0 : ReportCopyDataParseError(r, copybuf);
446 rhaas 1504 GBC 1832 : if (copybuf[endpos] == '\0')
446 rhaas 1505 GIC 278 : break;
446 rhaas 1506 GBC 1554 : ++endpos;
446 rhaas 1507 EUB : }
1508 :
446 rhaas 1509 GBC 278 : *cursor = endpos + 1;
446 rhaas 1510 GIC 278 : return ©buf[startpos];
1511 : }
1512 :
1513 : /*
1514 : * Get an unsigned 64-bit integer from a CopyData message.
1515 : *
1516 : * Bail out if there are not at least 8 bytes remaining.
1517 : */
1518 : static uint64
446 rhaas 1519 GBC 157 : GetCopyDataUInt64(size_t r, char *copybuf, size_t *cursor)
1520 : {
1521 : uint64 result;
1522 :
446 rhaas 1523 GIC 157 : if (*cursor + sizeof(uint64) > r)
446 rhaas 1524 UIC 0 : ReportCopyDataParseError(r, copybuf);
446 rhaas 1525 GIC 157 : memcpy(&result, ©buf[*cursor], sizeof(uint64));
1526 157 : *cursor += sizeof(uint64);
1527 157 : return pg_ntoh64(result);
446 rhaas 1528 EUB : }
1529 :
1530 : /*
1531 : * Bail out if we didn't parse the whole message.
1532 : */
1533 : static void
446 rhaas 1534 GIC 415 : GetCopyDataEnd(size_t r, char *copybuf, size_t cursor)
1535 : {
1536 415 : if (r != cursor)
446 rhaas 1537 UIC 0 : ReportCopyDataParseError(r, copybuf);
446 rhaas 1538 GBC 415 : }
446 rhaas 1539 EUB :
1540 : /*
1541 : * Report failure to parse a CopyData message from the server. Then exit.
1542 : *
1543 : * As a debugging aid, we try to give some hint about what kind of message
1544 : * provoked the failure. Perhaps this is not detailed enough, but it's not
1545 : * clear that it's worth expending any more code on what should be a
1546 : * can't-happen case.
1547 : */
1548 : static void
446 rhaas 1549 UIC 0 : ReportCopyDataParseError(size_t r, char *copybuf)
1550 : {
1551 0 : if (r == 0)
366 tgl 1552 0 : pg_fatal("empty COPY message");
446 rhaas 1553 EUB : else
366 tgl 1554 UBC 0 : pg_fatal("malformed COPY message of type %d, length %zu",
366 tgl 1555 EUB : copybuf[0], r);
446 rhaas 1556 : }
1557 :
1558 : /*
520 1559 : * Receive raw tar data from the server, and stream it to the appropriate
1560 : * location. If we're writing a single tarfile to standard output, also
1561 : * receive the backup manifest and inject it into that tarfile.
1562 : */
1563 : static void
520 rhaas 1564 UIC 0 : ReceiveTarFile(PGconn *conn, char *archive_name, char *spclocation,
1565 : bool tablespacenum, pg_compress_specification *compress)
1566 : {
520 rhaas 1567 EUB : WriteTarState state;
1568 : bbstreamer *manifest_inject_streamer;
1569 : bool is_recovery_guc_supported;
516 1570 : bool expect_unterminated_tarfile;
1571 :
1572 : /* Pass all COPY data through to the backup streamer. */
520 rhaas 1573 UIC 0 : memset(&state, 0, sizeof(state));
1574 0 : is_recovery_guc_supported =
1575 0 : PQserverVersion(conn) >= MINIMUM_VERSION_FOR_RECOVERY_GUC;
516 rhaas 1576 UBC 0 : expect_unterminated_tarfile =
516 rhaas 1577 UIC 0 : PQserverVersion(conn) < MINIMUM_VERSION_FOR_TERMINATED_TARFILE;
520 1578 0 : state.streamer = CreateBackupStreamer(archive_name, spclocation,
1579 : &manifest_inject_streamer,
1580 : is_recovery_guc_supported,
1581 : expect_unterminated_tarfile,
382 rhaas 1582 EUB : compress);
520 rhaas 1583 UIC 0 : state.tablespacenum = tablespacenum;
520 rhaas 1584 UBC 0 : ReceiveCopyData(conn, ReceiveTarCopyChunk, &state);
416 tgl 1585 UIC 0 : progress_update_filename(NULL);
3746 magnus 1586 EUB :
1587 : /*
520 rhaas 1588 : * The decision as to whether we need to inject the backup manifest into
1589 : * the output at this stage is made by CreateBackupStreamer; if that is
1590 : * needed, manifest_inject_streamer will be non-NULL; otherwise, it will
1591 : * be NULL.
1592 : */
520 rhaas 1593 UIC 0 : if (manifest_inject_streamer != NULL)
1594 : {
1595 : PQExpBufferData buf;
1596 :
1597 : /* Slurp the entire backup manifest into a buffer. */
1101 rhaas 1598 LBC 0 : initPQExpBuffer(&buf);
1101 rhaas 1599 UIC 0 : ReceiveBackupManifestInMemory(conn, &buf);
1600 0 : if (PQExpBufferDataBroken(buf))
366 tgl 1601 0 : pg_fatal("out of memory");
1602 :
1603 : /* Inject it into the output tarfile. */
520 rhaas 1604 LBC 0 : bbstreamer_inject_file(manifest_inject_streamer, "backup_manifest",
1605 0 : buf.data, buf.len);
1606 :
520 rhaas 1607 ECB : /* Free memory. */
520 rhaas 1608 LBC 0 : termPQExpBuffer(&buf);
1221 rhaas 1609 ECB : }
1610 :
520 1611 : /* Cleanup. */
520 rhaas 1612 UIC 0 : bbstreamer_finalize(state.streamer);
1613 0 : bbstreamer_free(state.streamer);
1614 :
1615 0 : progress_report(tablespacenum, true, false);
1616 :
1617 : /*
1221 rhaas 1618 EUB : * Do not sync the resulting tar file yet, all files are synced once at
1619 : * the end.
1620 : */
1221 rhaas 1621 UIC 0 : }
1596 peter_e 1622 EUB :
1623 : /*
1221 rhaas 1624 : * Receive one chunk of tar-format data from the server.
1625 : */
1626 : static void
1221 rhaas 1627 UIC 0 : ReceiveTarCopyChunk(size_t r, char *copybuf, void *callback_data)
1221 rhaas 1628 EUB : {
1221 rhaas 1629 UIC 0 : WriteTarState *state = callback_data;
1596 peter_e 1630 EUB :
520 rhaas 1631 UBC 0 : bbstreamer_content(state->streamer, NULL, copybuf, r, BBSTREAMER_UNKNOWN);
1632 :
1221 rhaas 1633 UIC 0 : totaldone += r;
520 1634 0 : progress_report(state->tablespacenum, false, false);
4459 magnus 1635 0 : }
1636 :
3333 peter_e 1637 EUB :
1638 : /*
1639 : * Retrieve tablespace path, either relocated or original depending on whether
1640 : * -T was passed or not.
1641 : */
1642 : static const char *
3333 peter_e 1643 GIC 40 : get_tablespace_mapping(const char *dir)
1644 : {
3333 peter_e 1645 EUB : TablespaceListCell *cell;
1985 1646 : char canon_dir[MAXPGPATH];
1647 :
1648 : /* Canonicalize path for comparison consistency */
1985 peter_e 1649 GBC 40 : strlcpy(canon_dir, dir, sizeof(canon_dir));
1985 peter_e 1650 GIC 40 : canonicalize_path(canon_dir);
1651 :
3333 1652 40 : for (cell = tablespace_dirs.head; cell; cell = cell->next)
1985 1653 39 : if (strcmp(canon_dir, cell->old_dir) == 0)
3333 1654 39 : return cell->new_dir;
3333 peter_e 1655 EUB :
3333 peter_e 1656 GIC 1 : return dir;
3333 peter_e 1657 EUB : }
1658 :
1659 : /*
1660 : * Receive the backup manifest file and write it out to a file.
1661 : */
1662 : static void
1101 rhaas 1663 UIC 0 : ReceiveBackupManifest(PGconn *conn)
1101 rhaas 1664 EUB : {
1665 : WriteManifestState state;
1666 :
1101 rhaas 1667 UBC 0 : snprintf(state.filename, sizeof(state.filename),
1668 : "%s/backup_manifest.tmp", basedir);
1669 0 : state.file = fopen(state.filename, "wb");
1670 0 : if (state.file == NULL)
366 tgl 1671 UIC 0 : pg_fatal("could not create file \"%s\": %m", state.filename);
1672 :
1101 rhaas 1673 LBC 0 : ReceiveCopyData(conn, ReceiveBackupManifestChunk, &state);
1674 :
1101 rhaas 1675 UIC 0 : fclose(state.file);
1676 0 : }
1677 :
1678 : /*
1679 : * Receive one chunk of the backup manifest file and write it out to a file.
1680 : */
1681 : static void
1682 0 : ReceiveBackupManifestChunk(size_t r, char *copybuf, void *callback_data)
1101 rhaas 1683 ECB : {
1101 rhaas 1684 UIC 0 : WriteManifestState *state = callback_data;
1685 :
1024 alvherre 1686 0 : errno = 0;
1101 rhaas 1687 0 : if (fwrite(copybuf, r, 1, state->file) != 1)
1688 : {
1024 alvherre 1689 ECB : /* if write didn't set errno, assume problem is no disk space */
1024 alvherre 1690 UIC 0 : if (errno == 0)
1691 0 : errno = ENOSPC;
366 tgl 1692 LBC 0 : pg_fatal("could not write to file \"%s\": %m", state->filename);
1101 rhaas 1693 ECB : }
1101 rhaas 1694 UIC 0 : }
1695 :
1696 : /*
1697 : * Receive the backup manifest file and write it out to a file.
1698 : */
1101 rhaas 1699 ECB : static void
1101 rhaas 1700 LBC 0 : ReceiveBackupManifestInMemory(PGconn *conn, PQExpBuffer buf)
1101 rhaas 1701 ECB : {
1101 rhaas 1702 LBC 0 : ReceiveCopyData(conn, ReceiveBackupManifestInMemoryChunk, buf);
1703 0 : }
1704 :
1101 rhaas 1705 EUB : /*
1706 : * Receive one chunk of the backup manifest file and write it out to a file.
1707 : */
1708 : static void
1101 rhaas 1709 UIC 0 : ReceiveBackupManifestInMemoryChunk(size_t r, char *copybuf,
1101 rhaas 1710 ECB : void *callback_data)
1711 : {
1101 rhaas 1712 UIC 0 : PQExpBuffer buf = callback_data;
1713 :
1714 0 : appendPQExpBuffer(buf, copybuf, r);
1715 0 : }
1716 :
4459 magnus 1717 ECB : static void
382 rhaas 1718 GIC 142 : BaseBackup(char *compression_algorithm, char *compression_detail,
1719 : CompressionLocation compressloc, pg_compress_specification *client_compress)
1720 : {
1721 : PGresult *res;
1722 : char *sysidentifier;
3112 andres 1723 EUB : TimeLineID latesttli;
1724 : TimeLineID starttli;
1725 : char *basebkp;
1726 : int i;
1727 : char xlogstart[64];
267 peter 1728 GNC 142 : char xlogend[64] = {0};
1729 : int minServerMajor,
3670 heikki.linnakangas 1730 ECB : maxServerMajor;
2362 rhaas 1731 : int serverVersion,
1732 : serverMajor;
1733 : int writing_to_stdout;
551 rhaas 1734 GIC 142 : bool use_new_option_syntax = false;
1735 : PQExpBufferData buf;
4459 magnus 1736 ECB :
2362 rhaas 1737 GBC 142 : Assert(conn != NULL);
551 rhaas 1738 GIC 142 : initPQExpBuffer(&buf);
1739 :
1740 : /*
1741 : * Check server version. BASE_BACKUP command was introduced in 9.1, so we
3602 bruce 1742 ECB : * can't work with servers older than 9.1.
3670 heikki.linnakangas 1743 : */
3670 heikki.linnakangas 1744 CBC 142 : minServerMajor = 901;
1745 142 : maxServerMajor = PG_VERSION_NUM / 100;
2362 rhaas 1746 142 : serverVersion = PQserverVersion(conn);
1747 142 : serverMajor = serverVersion / 100;
3670 heikki.linnakangas 1748 GIC 142 : if (serverMajor < minServerMajor || serverMajor > maxServerMajor)
3670 heikki.linnakangas 1749 ECB : {
3670 heikki.linnakangas 1750 LBC 0 : const char *serverver = PQparameterStatus(conn, "server_version");
1751 :
366 tgl 1752 UIC 0 : pg_fatal("incompatible server version %s",
366 tgl 1753 EUB : serverver ? serverver : "'unknown'");
1754 : }
551 rhaas 1755 CBC 142 : if (serverMajor >= 1500)
551 rhaas 1756 GIC 142 : use_new_option_syntax = true;
3670 heikki.linnakangas 1757 ECB :
1758 : /*
1759 : * If WAL streaming was requested, also check that the server is new
3670 heikki.linnakangas 1760 EUB : * enough for that.
1761 : */
2281 magnus 1762 CBC 142 : if (includewal == STREAM_WAL && !CheckServerVersionForStreaming(conn))
3670 heikki.linnakangas 1763 ECB : {
1764 : /*
2286 magnus 1765 : * Error message already written in CheckServerVersionForStreaming(),
1766 : * but add a hint about using -X none.
1767 : */
197 peter 1768 UIC 0 : pg_log_error_hint("Use -X none or -X fetch to disable log streaming.");
1562 peter 1769 LBC 0 : exit(1);
3670 heikki.linnakangas 1770 ECB : }
1771 :
1772 : /*
1596 peter_e 1773 EUB : * Build contents of configuration file if requested
1774 : */
3746 magnus 1775 GIC 142 : if (writerecoveryconf)
1292 alvherre 1776 2 : recoveryconfcontents = GenerateRecoveryConfig(conn, replication_slot);
3746 magnus 1777 ECB :
1778 : /*
4183 1779 : * Run IDENTIFY_SYSTEM so we can get the timeline
1780 : */
3112 andres 1781 CBC 142 : if (!RunIdentifySystem(conn, &sysidentifier, &latesttli, NULL, NULL))
1562 peter 1782 LBC 0 : exit(1);
1783 :
1784 : /*
1785 : * Start the actual backup
4448 magnus 1786 ECB : */
551 rhaas 1787 GIC 142 : AppendStringCommandOption(&buf, use_new_option_syntax, "LABEL", label);
1788 142 : if (estimatesize)
1789 142 : AppendPlainCommandOption(&buf, use_new_option_syntax, "PROGRESS");
551 rhaas 1790 CBC 142 : if (includewal == FETCH_WAL)
551 rhaas 1791 GBC 24 : AppendPlainCommandOption(&buf, use_new_option_syntax, "WAL");
551 rhaas 1792 GIC 142 : if (fastcheckpoint)
551 rhaas 1793 ECB : {
551 rhaas 1794 GBC 132 : if (use_new_option_syntax)
551 rhaas 1795 GIC 132 : AppendStringCommandOption(&buf, use_new_option_syntax,
551 rhaas 1796 ECB : "CHECKPOINT", "fast");
1797 : else
551 rhaas 1798 LBC 0 : AppendPlainCommandOption(&buf, use_new_option_syntax, "FAST");
1799 : }
551 rhaas 1800 CBC 142 : if (includewal != NO_WAL)
1801 : {
551 rhaas 1802 GIC 135 : if (use_new_option_syntax)
1803 135 : AppendIntegerCommandOption(&buf, use_new_option_syntax, "WAIT", 0);
1804 : else
551 rhaas 1805 UIC 0 : AppendPlainCommandOption(&buf, use_new_option_syntax, "NOWAIT");
1806 : }
3328 alvherre 1807 CBC 142 : if (maxrate > 0)
551 rhaas 1808 1 : AppendIntegerCommandOption(&buf, use_new_option_syntax, "MAX_RATE",
1809 : maxrate);
1810 142 : if (format == 't')
551 rhaas 1811 GIC 14 : AppendPlainCommandOption(&buf, use_new_option_syntax, "TABLESPACE_MAP");
1812 142 : if (!verify_checksums)
1813 : {
551 rhaas 1814 CBC 1 : if (use_new_option_syntax)
1815 1 : AppendIntegerCommandOption(&buf, use_new_option_syntax,
1816 : "VERIFY_CHECKSUMS", 0);
1817 : else
551 rhaas 1818 LBC 0 : AppendPlainCommandOption(&buf, use_new_option_syntax,
1819 : "NOVERIFY_CHECKSUMS");
551 rhaas 1820 ECB : }
3328 alvherre 1821 EUB :
1101 rhaas 1822 CBC 142 : if (manifest)
1823 : {
551 1824 141 : AppendStringCommandOption(&buf, use_new_option_syntax, "MANIFEST",
509 1825 141 : manifest_force_encode ? "force-encode" : "yes");
1101 rhaas 1826 GIC 141 : if (manifest_checksums != NULL)
551 1827 7 : AppendStringCommandOption(&buf, use_new_option_syntax,
1828 : "MANIFEST_CHECKSUMS", manifest_checksums);
1829 : }
1101 rhaas 1830 ECB :
509 rhaas 1831 GBC 142 : if (backup_target != NULL)
1832 : {
509 rhaas 1833 ECB : char *colon;
1834 :
509 rhaas 1835 GBC 15 : if (serverMajor < 1500)
366 tgl 1836 UBC 0 : pg_fatal("backup targets are not supported by this server version");
509 rhaas 1837 EUB :
437 rhaas 1838 GIC 15 : if (writerecoveryconf)
366 tgl 1839 UBC 0 : pg_fatal("recovery configuration cannot be written when a backup target is used");
1840 :
509 rhaas 1841 GIC 15 : AppendPlainCommandOption(&buf, use_new_option_syntax, "TABLESPACE_MAP");
509 rhaas 1842 ECB :
509 rhaas 1843 CBC 15 : if ((colon = strchr(backup_target, ':')) == NULL)
1844 : {
509 rhaas 1845 GBC 6 : AppendStringCommandOption(&buf, use_new_option_syntax,
1846 : "TARGET", backup_target);
509 rhaas 1847 ECB : }
509 rhaas 1848 EUB : else
1849 : {
1850 : char *target;
1851 :
509 rhaas 1852 GIC 9 : target = pnstrdup(backup_target, colon - backup_target);
1853 9 : AppendStringCommandOption(&buf, use_new_option_syntax,
509 rhaas 1854 ECB : "TARGET", target);
509 rhaas 1855 CBC 9 : AppendStringCommandOption(&buf, use_new_option_syntax,
509 rhaas 1856 ECB : "TARGET_DETAIL", colon + 1);
1857 : }
1858 : }
509 rhaas 1859 GBC 127 : else if (serverMajor >= 1500)
446 rhaas 1860 GIC 127 : AppendStringCommandOption(&buf, use_new_option_syntax,
1861 : "TARGET", "client");
446 rhaas 1862 ECB :
440 rhaas 1863 GIC 142 : if (compressloc == COMPRESS_LOCATION_SERVER)
440 rhaas 1864 ECB : {
440 rhaas 1865 GBC 29 : if (!use_new_option_syntax)
366 tgl 1866 UIC 0 : pg_fatal("server does not support server-side compression");
440 rhaas 1867 GIC 29 : AppendStringCommandOption(&buf, use_new_option_syntax,
1868 : "COMPRESSION", compression_algorithm);
382 1869 29 : if (compression_detail != NULL)
1870 14 : AppendStringCommandOption(&buf, use_new_option_syntax,
1871 : "COMPRESSION_DETAIL",
382 rhaas 1872 ECB : compression_detail);
440 1873 : }
1874 :
2233 magnus 1875 GBC 142 : if (verbose)
1469 peter 1876 LBC 0 : pg_log_info("initiating base backup, waiting for checkpoint to complete");
1877 :
2233 magnus 1878 CBC 142 : if (showprogress && !verbose)
1955 peter_e 1879 EUB : {
197 peter 1880 UIC 0 : fprintf(stderr, _("waiting for checkpoint"));
1955 peter_e 1881 0 : if (isatty(fileno(stderr)))
1882 0 : fprintf(stderr, "\r");
1883 : else
1884 0 : fprintf(stderr, "\n");
1955 peter_e 1885 ECB : }
2233 magnus 1886 :
551 rhaas 1887 GBC 142 : if (use_new_option_syntax && buf.len > 0)
551 rhaas 1888 GIC 142 : basebkp = psprintf("BASE_BACKUP (%s)", buf.data);
551 rhaas 1889 ECB : else
551 rhaas 1890 UBC 0 : basebkp = psprintf("BASE_BACKUP %s", buf.data);
1891 :
3328 alvherre 1892 GIC 142 : if (PQsendQuery(conn, basebkp) == 0)
366 tgl 1893 UIC 0 : pg_fatal("could not send replication command \"%s\": %s",
1894 : "BASE_BACKUP", PQerrorMessage(conn));
4459 magnus 1895 ECB :
1896 : /*
2158 peter_e 1897 : * Get the starting WAL location
1898 : */
4459 magnus 1899 CBC 142 : res = PQgetResult(conn);
4459 magnus 1900 GIC 142 : if (PQresultStatus(res) != PGRES_TUPLES_OK)
366 tgl 1901 16 : pg_fatal("could not initiate base backup: %s",
1902 : PQerrorMessage(conn));
3670 heikki.linnakangas 1903 126 : if (PQntuples(res) != 1)
366 tgl 1904 UIC 0 : pg_fatal("server returned unexpected response to BASE_BACKUP command; got %d rows and %d fields, expected %d rows and %d fields",
1905 : PQntuples(res), PQnfields(res), 1, 2);
1906 :
3338 tgl 1907 GIC 126 : strlcpy(xlogstart, PQgetvalue(res, 0, 0), sizeof(xlogstart));
1908 :
2233 magnus 1909 126 : if (verbose)
1469 peter 1910 UIC 0 : pg_log_info("checkpoint completed");
2233 magnus 1911 ECB :
1912 : /*
3670 heikki.linnakangas 1913 : * 9.3 and later sends the TLI of the starting point. With older servers,
1914 : * assume it's the same as the latest timeline reported by
3602 bruce 1915 : * IDENTIFY_SYSTEM.
1916 : */
3670 heikki.linnakangas 1917 GIC 126 : if (PQnfields(res) >= 2)
1918 126 : starttli = atoi(PQgetvalue(res, 0, 1));
1919 : else
3670 heikki.linnakangas 1920 UIC 0 : starttli = latesttli;
4448 magnus 1921 GIC 126 : PQclear(res);
4448 magnus 1922 ECB :
2281 magnus 1923 CBC 126 : if (verbose && includewal != NO_WAL)
1469 peter 1924 UBC 0 : pg_log_info("write-ahead log start point: %s on timeline %u",
1925 : xlogstart, starttli);
1926 :
1927 : /*
1928 : * Get the header
1929 : */
4448 magnus 1930 GIC 126 : res = PQgetResult(conn);
4448 magnus 1931 CBC 126 : if (PQresultStatus(res) != PGRES_TUPLES_OK)
366 tgl 1932 UIC 0 : pg_fatal("could not get backup header: %s",
1933 : PQerrorMessage(conn));
4459 magnus 1934 GIC 126 : if (PQntuples(res) < 1)
366 tgl 1935 UIC 0 : pg_fatal("no data returned from server");
4459 magnus 1936 ECB :
4459 magnus 1937 EUB : /*
1938 : * Sum up the total size, for progress reporting
4459 magnus 1939 ECB : */
1314 peter 1940 GIC 126 : totalsize_kb = totaldone = 0;
4459 magnus 1941 CBC 126 : tablespacecount = PQntuples(res);
1942 266 : for (i = 0; i < PQntuples(res); i++)
1943 : {
1314 peter 1944 GIC 141 : totalsize_kb += atol(PQgetvalue(res, i, 2));
1945 :
4459 magnus 1946 ECB : /*
1947 : * Verify tablespace directories are empty. Don't bother with the
1948 : * first once since it can be relocated, and it will be checked before
1949 : * we do anything anyway.
509 rhaas 1950 : *
1951 : * Note that this is skipped for tar format backups and backups that
1952 : * the server is storing to a target location, since in that case we
1953 : * won't be storing anything into these directories and thus should
1954 : * not create them.
4459 magnus 1955 : */
509 rhaas 1956 GIC 141 : if (backup_target == NULL && format == 'p' && !PQgetisnull(res, i, 1))
1957 : {
1531 peter 1958 CBC 14 : char *path = unconstify(char *, get_tablespace_mapping(PQgetvalue(res, i, 1)));
1959 :
2400 peter_e 1960 GIC 14 : verify_dir_is_empty_or_create(path, &made_tablespace_dirs, &found_tablespace_dirs);
1961 : }
1962 : }
4459 magnus 1963 EUB :
1964 : /*
1965 : * When writing to stdout, require a single tablespace
1966 : */
509 rhaas 1967 GIC 139 : writing_to_stdout = format == 't' && basedir != NULL &&
1968 14 : strcmp(basedir, "-") == 0;
1101 1969 125 : if (writing_to_stdout && PQntuples(res) > 1)
366 tgl 1970 UIC 0 : pg_fatal("can only write single tablespace to stdout, database has %d",
1971 : PQntuples(res));
1972 :
1973 : /*
1974 : * If we're streaming WAL, start the streaming session before we start
1975 : * receiving the actual data chunks.
4183 magnus 1976 EUB : */
2281 magnus 1977 GIC 125 : if (includewal == STREAM_WAL)
4183 magnus 1978 EUB : {
332 tgl 1979 : pg_compress_algorithm wal_compress_algorithm;
1980 : int wal_compress_level;
1981 :
4183 magnus 1982 GIC 99 : if (verbose)
1469 peter 1983 UBC 0 : pg_log_info("starting background WAL receiver");
1984 :
362 michael 1985 GBC 99 : if (client_compress->algorithm == PG_COMPRESSION_GZIP)
1986 : {
362 michael 1987 GIC 3 : wal_compress_algorithm = PG_COMPRESSION_GZIP;
207 michael 1988 GBC 3 : wal_compress_level = client_compress->level;
1989 : }
1990 : else
1991 : {
362 michael 1992 GIC 96 : wal_compress_algorithm = PG_COMPRESSION_NONE;
382 rhaas 1993 96 : wal_compress_level = 0;
1994 : }
1995 :
1996 99 : StartLogStreamer(xlogstart, starttli, sysidentifier,
1997 : wal_compress_algorithm,
1998 : wal_compress_level);
1999 : }
2000 :
446 2001 124 : if (serverMajor >= 1500)
2002 : {
446 rhaas 2003 EUB : /* Receive a single tar stream with everything. */
382 rhaas 2004 GBC 124 : ReceiveArchiveStream(conn, client_compress);
2005 : }
2006 : else
446 rhaas 2007 ECB : {
2008 : /* Receive a tar file for each tablespace in turn */
446 rhaas 2009 UBC 0 : for (i = 0; i < PQntuples(res); i++)
520 rhaas 2010 EUB : {
2011 : char archive_name[MAXPGPATH];
2012 : char *spclocation;
446 rhaas 2013 ECB :
2014 : /*
2015 : * If we write the data out to a tar file, it will be named
2016 : * base.tar if it's the main data directory or <tablespaceoid>.tar
2017 : * if it's for another tablespace. CreateBackupStreamer() will
2018 : * arrange to add an extension to the archive name if
2019 : * pg_basebackup is performing compression, depending on the
2020 : * compression type.
2021 : */
446 rhaas 2022 UIC 0 : if (PQgetisnull(res, i, 0))
446 rhaas 2023 ECB : {
446 rhaas 2024 UBC 0 : strlcpy(archive_name, "base.tar", sizeof(archive_name));
446 rhaas 2025 LBC 0 : spclocation = NULL;
446 rhaas 2026 ECB : }
446 rhaas 2027 EUB : else
446 rhaas 2028 ECB : {
446 rhaas 2029 UIC 0 : snprintf(archive_name, sizeof(archive_name),
446 rhaas 2030 ECB : "%s.tar", PQgetvalue(res, i, 0));
446 rhaas 2031 LBC 0 : spclocation = PQgetvalue(res, i, 1);
2032 : }
446 rhaas 2033 ECB :
382 rhaas 2034 UIC 0 : ReceiveTarFile(conn, archive_name, spclocation, i,
382 rhaas 2035 ECB : client_compress);
520 2036 : }
2037 :
446 2038 : /*
2039 : * Now receive backup manifest, if appropriate.
2040 : *
2041 : * If we're writing a tarfile to stdout, ReceiveTarFile will have
2042 : * already processed the backup manifest and included it in the output
446 rhaas 2043 EUB : * tarfile. Such a configuration doesn't allow for writing multiple
2044 : * files.
2045 : *
446 rhaas 2046 ECB : * If we're talking to an older server, it won't send a backup
2047 : * manifest, so don't try to receive one.
2048 : */
446 rhaas 2049 LBC 0 : if (!writing_to_stdout && manifest)
446 rhaas 2050 UIC 0 : ReceiveBackupManifest(conn);
2051 : }
2052 :
4459 magnus 2053 GIC 121 : if (showprogress)
2054 : {
416 tgl 2055 UIC 0 : progress_update_filename(NULL);
520 rhaas 2056 0 : progress_report(PQntuples(res), true, true);
2057 : }
2058 :
4459 magnus 2059 GIC 121 : PQclear(res);
2060 :
2061 : /*
2062 : * Get the stop position
2063 : */
4448 2064 121 : res = PQgetResult(conn);
2065 121 : if (PQresultStatus(res) != PGRES_TUPLES_OK)
366 tgl 2066 CBC 1 : pg_fatal("backup failed: %s",
366 tgl 2067 EUB : PQerrorMessage(conn));
4448 magnus 2068 GIC 120 : if (PQntuples(res) != 1)
366 tgl 2069 UIC 0 : pg_fatal("no write-ahead log end position returned from server");
3338 tgl 2070 CBC 120 : strlcpy(xlogend, PQgetvalue(res, 0, 0), sizeof(xlogend));
2281 magnus 2071 GBC 120 : if (verbose && includewal != NO_WAL)
1469 peter 2072 UIC 0 : pg_log_info("write-ahead log end point: %s", xlogend);
4448 magnus 2073 GIC 120 : PQclear(res);
4448 magnus 2074 ECB :
4459 magnus 2075 CBC 120 : res = PQgetResult(conn);
4459 magnus 2076 GBC 120 : if (PQresultStatus(res) != PGRES_COMMAND_OK)
4459 magnus 2077 ECB : {
1832 magnus 2078 GBC 3 : const char *sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
1832 magnus 2079 ECB :
1832 magnus 2080 GBC 3 : if (sqlstate &&
1832 magnus 2081 GIC 3 : strcmp(sqlstate, ERRCODE_DATA_CORRUPTED) == 0)
2082 : {
1469 peter 2083 3 : pg_log_error("checksum error occurred");
1832 magnus 2084 3 : checksum_failure = true;
2085 : }
2086 : else
2087 : {
1469 peter 2088 UIC 0 : pg_log_error("final receive failed: %s",
2089 : PQerrorMessage(conn));
2090 : }
1562 peter 2091 GIC 3 : exit(1);
2092 : }
2093 :
4183 magnus 2094 117 : if (bgchild > 0)
2095 : {
2096 : #ifndef WIN32
2097 : int status;
2098 : pid_t r;
2099 : #else
2100 : DWORD status;
2101 :
2102 : /*
2103 : * get a pointer sized version of bgchild to avoid warnings about
2104 : * casting to a different size on WIN64.
2105 : */
2106 : intptr_t bgchild_handle = bgchild;
2107 : uint32 hi,
2108 : lo;
2109 : #endif
2110 :
2111 91 : if (verbose)
1469 peter 2112 UIC 0 : pg_log_info("waiting for background process to finish streaming ...");
2113 :
2114 : #ifndef WIN32
4029 andrew 2115 CBC 91 : if (write(bgpipe[1], xlogend, strlen(xlogend)) != strlen(xlogend))
366 tgl 2116 UIC 0 : pg_fatal("could not send command to background pipe: %m");
2117 :
2118 : /* Just wait for the background process to exit */
4183 magnus 2119 GIC 91 : r = waitpid(bgchild, &status, 0);
1575 tgl 2120 CBC 91 : if (r == (pid_t) -1)
366 tgl 2121 LBC 0 : pg_fatal("could not wait for child process: %m");
4183 magnus 2122 CBC 91 : if (r != bgchild)
366 tgl 2123 UIC 0 : pg_fatal("child %d died, expected %d", (int) r, (int) bgchild);
1575 tgl 2124 GIC 91 : if (status != 0)
366 tgl 2125 UIC 0 : pg_fatal("%s", wait_result_to_str(status));
2126 : /* Exited normally, we're happy! */
2127 : #else /* WIN32 */
2128 :
2129 : /*
2130 : * On Windows, since we are in the same process, we can just store the
2131 : * value directly in the variable, and then set the flag that says
2132 : * it's there.
2133 : */
3941 heikki.linnakangas 2134 ECB : if (sscanf(xlogend, "%X/%X", &hi, &lo) != 2)
2135 : pg_fatal("could not parse write-ahead log location \"%s\"",
366 tgl 2136 EUB : xlogend);
3941 heikki.linnakangas 2137 : xlogendptr = ((uint64) hi) << 32 | lo;
4183 magnus 2138 : InterlockedIncrement(&has_xlogendptr);
2139 :
2140 : /* First wait for the thread to exit */
2536 andrew 2141 : if (WaitForSingleObjectEx((HANDLE) bgchild_handle, INFINITE, FALSE) !=
2142 : WAIT_OBJECT_0)
2143 : {
2144 : _dosmaperr(GetLastError());
366 tgl 2145 : pg_fatal("could not wait for child thread: %m");
2146 : }
2147 : if (GetExitCodeThread((HANDLE) bgchild_handle, &status) == 0)
2148 : {
2149 : _dosmaperr(GetLastError());
2150 : pg_fatal("could not get child thread exit status: %m");
2151 : }
2152 : if (status != 0)
2153 : pg_fatal("child thread exited with error %u",
2154 : (unsigned int) status);
2155 : /* Exited normally, we're happy */
4183 magnus 2156 ECB : #endif
2157 : }
2158 :
2159 : /* Free the configuration file contents */
3746 magnus 2160 GIC 117 : destroyPQExpBuffer(recoveryconfcontents);
3746 magnus 2161 ECB :
4459 magnus 2162 EUB : /*
2163 : * End of copy data. Final result is already checked inside the loop.
4459 magnus 2164 ECB : */
4097 magnus 2165 CBC 117 : PQclear(res);
4459 magnus 2166 GIC 117 : PQfinish(conn);
1562 peter 2167 CBC 117 : conn = NULL;
2168 :
2169 : /*
2153 bruce 2170 EUB : * Make data persistent on disk once backup is completed. For tar format
1313 michael 2171 : * sync the parent directory and all its contents as each tar file was not
2172 : * synced after being completed. In plain format, all the data of the
2173 : * base directory is synced, taking into account all the tablespaces.
2174 : * Errors are not considered fatal.
509 rhaas 2175 ECB : *
509 rhaas 2176 EUB : * If, however, there's a backup target, we're not writing anything
2177 : * locally, so in that case we skip this step.
2178 : */
509 rhaas 2179 GIC 117 : if (do_sync && backup_target == NULL)
2180 : {
1715 michael 2181 LBC 0 : if (verbose)
1469 peter 2182 UBC 0 : pg_log_info("syncing data to disk ...");
2383 peter_e 2183 LBC 0 : if (format == 't')
2184 : {
2383 peter_e 2185 UIC 0 : if (strcmp(basedir, "-") != 0)
1313 michael 2186 0 : (void) fsync_dir_recurse(basedir);
2383 peter_e 2187 ECB : }
2188 : else
2189 : {
1469 peter 2190 UIC 0 : (void) fsync_pgdata(basedir, serverVersion);
2191 : }
2192 : }
2193 :
2194 : /*
2195 : * After synchronizing data to disk, perform a durable rename of
2196 : * backup_manifest.tmp to backup_manifest, if we wrote such a file. This
2197 : * way, a failure or system crash before we reach this point will leave us
2198 : * without a backup_manifest file, decreasing the chances that a directory
2199 : * we leave behind will be mistaken for a valid backup.
2200 : */
509 rhaas 2201 GIC 117 : if (!writing_to_stdout && manifest && backup_target == NULL)
2202 : {
2203 : char tmp_filename[MAXPGPATH];
2204 : char filename[MAXPGPATH];
2205 :
1101 2206 106 : if (verbose)
1101 rhaas 2207 UIC 0 : pg_log_info("renaming backup_manifest.tmp to backup_manifest");
2208 :
1101 rhaas 2209 GIC 106 : snprintf(tmp_filename, MAXPGPATH, "%s/backup_manifest.tmp", basedir);
2210 106 : snprintf(filename, MAXPGPATH, "%s/backup_manifest", basedir);
2211 :
441 andres 2212 106 : if (do_sync)
2213 : {
2214 : /* durable_rename emits its own log message in case of failure */
441 andres 2215 UIC 0 : if (durable_rename(tmp_filename, filename) != 0)
2216 0 : exit(1);
2217 : }
2218 : else
2219 : {
441 andres 2220 GIC 106 : if (rename(tmp_filename, filename) != 0)
366 tgl 2221 UIC 0 : pg_fatal("could not rename file \"%s\" to \"%s\": %m",
2222 : tmp_filename, filename);
2223 : }
2224 : }
2225 :
4459 magnus 2226 GIC 117 : if (verbose)
1469 peter 2227 UIC 0 : pg_log_info("base backup completed");
4459 magnus 2228 CBC 117 : }
4459 magnus 2229 ECB :
2230 :
2231 : int
4459 magnus 2232 GIC 176 : main(int argc, char **argv)
4459 magnus 2233 ECB : {
2234 : static struct option long_options[] = {
2235 : {"help", no_argument, NULL, '?'},
2236 : {"version", no_argument, NULL, 'V'},
2237 : {"pgdata", required_argument, NULL, 'D'},
2238 : {"format", required_argument, NULL, 'F'},
2239 : {"checkpoint", required_argument, NULL, 'c'},
2240 : {"create-slot", no_argument, NULL, 'C'},
3328 alvherre 2241 : {"max-rate", required_argument, NULL, 'r'},
3746 magnus 2242 : {"write-recovery-conf", no_argument, NULL, 'R'},
2243 : {"slot", required_argument, NULL, 'S'},
509 rhaas 2244 : {"target", required_argument, NULL, 't'},
3333 peter_e 2245 : {"tablespace-mapping", required_argument, NULL, 'T'},
2246 : {"wal-method", required_argument, NULL, 'X'},
4332 2247 : {"gzip", no_argument, NULL, 'z'},
4459 magnus 2248 : {"compress", required_argument, NULL, 'Z'},
2249 : {"label", required_argument, NULL, 'l'},
2250 : {"no-clean", no_argument, NULL, 'n'},
2251 : {"no-sync", no_argument, NULL, 'N'},
3695 heikki.linnakangas 2252 : {"dbname", required_argument, NULL, 'd'},
2253 : {"host", required_argument, NULL, 'h'},
4459 magnus 2254 : {"port", required_argument, NULL, 'p'},
2255 : {"username", required_argument, NULL, 'U'},
2256 : {"no-password", no_argument, NULL, 'w'},
2257 : {"password", no_argument, NULL, 'W'},
2258 : {"status-interval", required_argument, NULL, 's'},
2259 : {"verbose", no_argument, NULL, 'v'},
2260 : {"progress", no_argument, NULL, 'P'},
2250 rhaas 2261 : {"waldir", required_argument, NULL, 1},
2274 magnus 2262 EUB : {"no-slot", no_argument, NULL, 2},
1784 peter_e 2263 : {"no-verify-checksums", no_argument, NULL, 3},
2264 : {"no-estimate-size", no_argument, NULL, 4},
1101 rhaas 2265 : {"no-manifest", no_argument, NULL, 5},
2266 : {"manifest-force-encode", no_argument, NULL, 6},
1101 rhaas 2267 ECB : {"manifest-checksums", required_argument, NULL, 7},
4459 magnus 2268 : {NULL, 0, NULL, 0}
2269 : };
2270 : int c;
2271 :
2272 : int option_index;
382 rhaas 2273 CBC 176 : char *compression_algorithm = "none";
2274 176 : char *compression_detail = NULL;
332 tgl 2275 176 : CompressionLocation compressloc = COMPRESS_LOCATION_UNSPECIFIED;
332 tgl 2276 ECB : pg_compress_specification client_compress;
4459 magnus 2277 :
1469 peter 2278 CBC 176 : pg_logging_init(argv[0]);
4459 magnus 2279 176 : progname = get_progname(argv[0]);
2280 176 : set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_basebackup"));
4459 magnus 2281 ECB :
4459 magnus 2282 GIC 176 : if (argc > 1)
4459 magnus 2283 EUB : {
4459 magnus 2284 GIC 175 : if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
4459 magnus 2285 ECB : {
4459 magnus 2286 CBC 1 : usage();
2287 1 : exit(0);
4459 magnus 2288 ECB : }
4459 magnus 2289 GBC 174 : else if (strcmp(argv[1], "-V") == 0
2290 174 : || strcmp(argv[1], "--version") == 0)
4459 magnus 2291 EUB : {
4459 magnus 2292 CBC 1 : puts("pg_basebackup (PostgreSQL) " PG_VERSION);
2293 1 : exit(0);
4459 magnus 2294 ECB : }
2295 : }
2296 :
2400 peter_e 2297 CBC 174 : atexit(cleanup_directories_atexit);
2400 peter_e 2298 ECB :
118 peter 2299 GNC 920 : while ((c = getopt_long(argc, argv, "c:Cd:D:F:h:l:nNp:Pr:Rs:S:t:T:U:vwWX:zZ:",
4459 magnus 2300 CBC 920 : long_options, &option_index)) != -1)
4459 magnus 2301 EUB : {
4459 magnus 2302 GBC 753 : switch (c)
4459 magnus 2303 EUB : {
118 peter 2304 GNC 150 : case 'c':
2305 150 : if (pg_strcasecmp(optarg, "fast") == 0)
2306 150 : fastcheckpoint = true;
118 peter 2307 UNC 0 : else if (pg_strcasecmp(optarg, "spread") == 0)
2308 0 : fastcheckpoint = false;
2309 : else
2310 0 : pg_fatal("invalid checkpoint argument \"%s\", must be \"fast\" or \"spread\"",
2311 : optarg);
118 peter 2312 GNC 150 : break;
2021 peter_e 2313 CBC 6 : case 'C':
2314 6 : create_slot = true;
2315 6 : break;
118 peter 2316 GNC 1 : case 'd':
2317 1 : connection_string = pg_strdup(optarg);
2318 1 : break;
4459 magnus 2319 CBC 154 : case 'D':
3841 tgl 2320 154 : basedir = pg_strdup(optarg);
4459 magnus 2321 154 : break;
4459 magnus 2322 GBC 29 : case 'F':
2323 29 : if (strcmp(optarg, "p") == 0 || strcmp(optarg, "plain") == 0)
4459 magnus 2324 GIC 14 : format = 'p';
2325 15 : else if (strcmp(optarg, "t") == 0 || strcmp(optarg, "tar") == 0)
4459 magnus 2326 GBC 15 : format = 't';
4459 magnus 2327 EUB : else
366 tgl 2328 UBC 0 : pg_fatal("invalid output format \"%s\", must be \"plain\" or \"tar\"",
366 tgl 2329 ECB : optarg);
4459 magnus 2330 GIC 29 : break;
118 peter 2331 GNC 54 : case 'h':
2332 54 : dbhost = pg_strdup(optarg);
2333 54 : break;
118 peter 2334 UNC 0 : case 'l':
2335 0 : label = pg_strdup(optarg);
2336 0 : break;
118 peter 2337 GNC 1 : case 'n':
2338 1 : noclean = true;
2339 1 : break;
2340 150 : case 'N':
2341 150 : do_sync = false;
2342 150 : break;
2343 54 : case 'p':
2344 54 : dbport = pg_strdup(optarg);
2345 54 : break;
118 peter 2346 UNC 0 : case 'P':
2347 0 : showprogress = true;
2348 0 : break;
3328 alvherre 2349 GIC 1 : case 'r':
2350 1 : maxrate = parse_max_rate(optarg);
2351 1 : break;
3746 magnus 2352 2 : case 'R':
3746 magnus 2353 CBC 2 : writerecoveryconf = true;
2354 2 : break;
118 peter 2355 UNC 0 : case 's':
2356 0 : if (!option_parse_int(optarg, "-s/--status-interval", 0,
2357 : INT_MAX / 1000,
2358 : &standby_message_timeout))
2359 0 : exit(1);
2360 0 : standby_message_timeout *= 1000;
2361 0 : break;
2819 peter_e 2362 CBC 9 : case 'S':
2274 magnus 2363 ECB :
2364 : /*
2365 : * When specifying replication slot name, use a permanent
2366 : * slot.
2367 : */
2819 peter_e 2368 CBC 9 : replication_slot = pg_strdup(optarg);
2274 magnus 2369 9 : temp_replication_slot = false;
2370 9 : break;
509 rhaas 2371 GBC 20 : case 't':
2372 20 : backup_target = pg_strdup(optarg);
2373 20 : break;
3333 peter_e 2374 19 : case 'T':
2375 19 : tablespace_list_append(optarg);
2376 13 : break;
118 peter 2377 GNC 7 : case 'U':
2378 7 : dbuser = pg_strdup(optarg);
2379 7 : break;
118 peter 2380 UNC 0 : case 'v':
2381 0 : verbose++;
2382 0 : break;
2383 0 : case 'w':
2384 0 : dbgetpassword = -1;
2385 0 : break;
2386 0 : case 'W':
2387 0 : dbgetpassword = 1;
2388 0 : break;
3955 magnus 2389 GBC 43 : case 'X':
2286 magnus 2390 CBC 43 : if (strcmp(optarg, "n") == 0 ||
2391 43 : strcmp(optarg, "none") == 0)
3955 magnus 2392 ECB : {
2281 magnus 2393 GIC 10 : includewal = NO_WAL;
3955 magnus 2394 ECB : }
2286 magnus 2395 GIC 33 : else if (strcmp(optarg, "f") == 0 ||
2153 bruce 2396 CBC 33 : strcmp(optarg, "fetch") == 0)
2286 magnus 2397 ECB : {
2281 magnus 2398 GIC 24 : includewal = FETCH_WAL;
2286 magnus 2399 ECB : }
4183 magnus 2400 GIC 9 : else if (strcmp(optarg, "s") == 0 ||
4183 magnus 2401 CBC 9 : strcmp(optarg, "stream") == 0)
2286 magnus 2402 ECB : {
2281 magnus 2403 GIC 9 : includewal = STREAM_WAL;
2286 magnus 2404 ECB : }
2405 : else
366 tgl 2406 UIC 0 : pg_fatal("invalid wal-method option \"%s\", must be \"fetch\", \"stream\", or \"none\"",
366 tgl 2407 EUB : optarg);
4452 magnus 2408 GIC 43 : break;
4332 peter_e 2409 CBC 1 : case 'z':
382 rhaas 2410 1 : compression_algorithm = "gzip";
2411 1 : compression_detail = NULL;
440 2412 1 : compressloc = COMPRESS_LOCATION_UNSPECIFIED;
4332 peter_e 2413 1 : break;
4459 magnus 2414 37 : case 'Z':
130 michael 2415 GNC 37 : backup_parse_compress_options(optarg, &compression_algorithm,
2416 : &compression_detail, &compressloc);
4459 magnus 2417 GBC 37 : break;
118 peter 2418 GNC 1 : case 1:
2419 1 : xlog_dir = pg_strdup(optarg);
4459 magnus 2420 CBC 1 : break;
118 peter 2421 GNC 3 : case 2:
2422 3 : no_slot = true;
4459 magnus 2423 GIC 3 : break;
1784 peter_e 2424 1 : case 3:
1832 magnus 2425 1 : verify_checksums = false;
2426 1 : break;
1116 fujii 2427 LBC 0 : case 4:
1116 fujii 2428 UIC 0 : estimatesize = false;
1116 fujii 2429 LBC 0 : break;
1101 rhaas 2430 CBC 1 : case 5:
2431 1 : manifest = false;
1101 rhaas 2432 GIC 1 : break;
1101 rhaas 2433 CBC 1 : case 6:
2434 1 : manifest_force_encode = true;
1101 rhaas 2435 GIC 1 : break;
2436 7 : case 7:
2437 7 : manifest_checksums = pg_strdup(optarg);
2438 7 : break;
4459 magnus 2439 CBC 1 : default:
2440 : /* getopt_long already emitted a complaint */
366 tgl 2441 1 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
4459 magnus 2442 1 : exit(1);
4459 magnus 2443 ECB : }
2444 : }
2445 :
2446 : /*
2447 : * Any non-option arguments?
2448 : */
4459 magnus 2449 CBC 167 : if (optind < argc)
2450 : {
1469 peter 2451 UIC 0 : pg_log_error("too many command-line arguments (first is \"%s\")",
2452 : argv[optind]);
366 tgl 2453 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
4459 magnus 2454 0 : exit(1);
2455 : }
2456 :
4459 magnus 2457 ECB : /*
2458 : * Setting the backup target to 'client' is equivalent to leaving out the
509 rhaas 2459 : * option. This logic allows us to assume elsewhere that the backup is
2460 : * being stored locally if and only if backup_target == NULL.
2461 : */
509 rhaas 2462 CBC 167 : if (backup_target != NULL && strcmp(backup_target, "client") == 0)
2463 : {
509 rhaas 2464 UIC 0 : pg_free(backup_target);
2465 0 : backup_target = NULL;
2466 : }
2467 :
2468 : /*
2469 : * Can't use --format with --target. Without --target, default format is
2470 : * tar.
509 rhaas 2471 ECB : */
509 rhaas 2472 GIC 167 : if (backup_target != NULL && format != '\0')
2473 : {
2474 1 : pg_log_error("cannot specify both format and backup target");
366 tgl 2475 1 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
509 rhaas 2476 CBC 1 : exit(1);
509 rhaas 2477 ECB : }
509 rhaas 2478 GIC 166 : if (format == '\0')
2479 144 : format = 'p';
509 rhaas 2480 ECB :
2481 : /*
2482 : * Either directory or backup target should be specified, but not both
4459 magnus 2483 : */
509 rhaas 2484 GIC 166 : if (basedir == NULL && backup_target == NULL)
2485 : {
2486 1 : pg_log_error("must specify output directory or backup target");
366 tgl 2487 1 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
509 rhaas 2488 CBC 1 : exit(1);
509 rhaas 2489 ECB : }
509 rhaas 2490 CBC 165 : if (basedir != NULL && backup_target != NULL)
2491 : {
509 rhaas 2492 GIC 2 : pg_log_error("cannot specify both output directory and backup target");
366 tgl 2493 2 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
4459 magnus 2494 2 : exit(1);
2495 : }
2496 :
4459 magnus 2497 ECB : /*
2498 : * If the user has not specified where to perform backup compression,
332 tgl 2499 EUB : * default to the client, unless the user specified --target, in which
2500 : * case the server is the only choice.
4459 magnus 2501 : */
382 rhaas 2502 GIC 163 : if (compressloc == COMPRESS_LOCATION_UNSPECIFIED)
2503 : {
509 2504 140 : if (backup_target == NULL)
440 2505 127 : compressloc = COMPRESS_LOCATION_CLIENT;
2506 : else
440 rhaas 2507 CBC 13 : compressloc = COMPRESS_LOCATION_SERVER;
440 rhaas 2508 ECB : }
2509 :
382 rhaas 2510 EUB : /*
332 tgl 2511 : * If any compression that we're doing is happening on the client side, we
2512 : * must try to parse the compression algorithm and detail, but if it's all
2513 : * on the server side, then we're just going to pass through whatever was
2514 : * requested and let the server decide what to do.
2515 : */
382 rhaas 2516 GIC 163 : if (compressloc == COMPRESS_LOCATION_CLIENT)
2517 : {
332 tgl 2518 ECB : pg_compress_algorithm alg;
2519 : char *error_detail;
382 rhaas 2520 :
362 michael 2521 CBC 132 : if (!parse_compress_algorithm(compression_algorithm, &alg))
197 peter 2522 2 : pg_fatal("unrecognized compression algorithm: \"%s\"",
2523 : compression_algorithm);
382 rhaas 2524 ECB :
362 michael 2525 GIC 130 : parse_compress_specification(alg, compression_detail, &client_compress);
362 michael 2526 GBC 130 : error_detail = validate_compress_specification(&client_compress);
382 rhaas 2527 130 : if (error_detail != NULL)
366 tgl 2528 10 : pg_fatal("invalid compression specification: %s",
2529 : error_detail);
2530 : }
382 rhaas 2531 ECB : else
2532 : {
382 rhaas 2533 CBC 31 : Assert(compressloc == COMPRESS_LOCATION_SERVER);
362 michael 2534 31 : client_compress.algorithm = PG_COMPRESSION_NONE;
382 rhaas 2535 31 : client_compress.options = 0;
2536 : }
2537 :
2538 : /*
2539 : * Can't perform client-side compression if the backup is not being sent
2540 : * to the client.
440 rhaas 2541 ECB : */
440 rhaas 2542 GIC 151 : if (backup_target != NULL && compressloc == COMPRESS_LOCATION_CLIENT)
440 rhaas 2543 ECB : {
440 rhaas 2544 UIC 0 : pg_log_error("client-side compression is not possible when a backup target is specified");
366 tgl 2545 LBC 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
440 rhaas 2546 0 : exit(1);
440 rhaas 2547 ECB : }
2548 :
2549 : /*
2550 : * Client-side compression doesn't make sense unless tar format is in use.
2551 : */
382 rhaas 2552 CBC 151 : if (format == 'p' && compressloc == COMPRESS_LOCATION_CLIENT &&
362 michael 2553 GIC 106 : client_compress.algorithm != PG_COMPRESSION_NONE)
440 rhaas 2554 ECB : {
440 rhaas 2555 UIC 0 : pg_log_error("only tar mode backups can be compressed");
366 tgl 2556 LBC 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
4459 magnus 2557 UIC 0 : exit(1);
4459 magnus 2558 ECB : }
2559 :
2560 : /*
2561 : * Sanity checks for WAL method.
509 rhaas 2562 : */
509 rhaas 2563 GIC 151 : if (backup_target != NULL && includewal == STREAM_WAL)
509 rhaas 2564 EUB : {
509 rhaas 2565 GIC 2 : pg_log_error("WAL cannot be streamed when a backup target is specified");
366 tgl 2566 GBC 2 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
509 rhaas 2567 2 : exit(1);
2568 : }
2281 magnus 2569 GIC 149 : if (format == 't' && includewal == STREAM_WAL && strcmp(basedir, "-") == 0)
2570 : {
1469 peter 2571 UIC 0 : pg_log_error("cannot stream write-ahead logs in tar mode to stdout");
366 tgl 2572 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
2300 fujii 2573 0 : exit(1);
2300 fujii 2574 ECB : }
2575 :
2274 magnus 2576 CBC 149 : if (replication_slot && includewal != STREAM_WAL)
2577 : {
1469 peter 2578 GBC 1 : pg_log_error("replication slots can only be used with WAL streaming");
366 tgl 2579 1 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
2819 peter_e 2580 1 : exit(1);
2581 : }
2819 peter_e 2582 ECB :
2583 : /*
509 rhaas 2584 EUB : * Sanity checks for replication slot options.
2585 : */
2274 magnus 2586 GBC 148 : if (no_slot)
2587 : {
2274 magnus 2588 GIC 3 : if (replication_slot)
2589 : {
1469 peter 2590 CBC 2 : pg_log_error("--no-slot cannot be used with slot name");
366 tgl 2591 2 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
2274 magnus 2592 GIC 2 : exit(1);
2274 magnus 2593 EUB : }
2274 magnus 2594 GBC 1 : temp_replication_slot = false;
2274 magnus 2595 EUB : }
2596 :
2021 peter_e 2597 GIC 146 : if (create_slot)
2598 : {
2599 4 : if (!replication_slot)
2600 : {
1469 peter 2601 2 : pg_log_error("%s needs a slot to be specified using --slot",
1469 peter 2602 ECB : "--create-slot");
366 tgl 2603 GIC 2 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
2021 peter_e 2604 GBC 2 : exit(1);
2605 : }
2021 peter_e 2606 EUB :
2021 peter_e 2607 GBC 2 : if (no_slot)
2608 : {
1028 peter 2609 UIC 0 : pg_log_error("%s and %s are incompatible options",
2610 : "--create-slot", "--no-slot");
366 tgl 2611 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
2021 peter_e 2612 0 : exit(1);
2021 peter_e 2613 ECB : }
2614 : }
2021 peter_e 2615 EUB :
2616 : /*
509 rhaas 2617 : * Sanity checks on WAL directory.
2618 : */
2048 peter_e 2619 GIC 144 : if (xlog_dir)
2620 : {
509 rhaas 2621 CBC 1 : if (backup_target != NULL)
2622 : {
509 rhaas 2623 UBC 0 : pg_log_error("WAL directory location cannot be specified along with a backup target");
366 tgl 2624 UIC 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
509 rhaas 2625 UBC 0 : exit(1);
509 rhaas 2626 EUB : }
3420 fujii 2627 GIC 1 : if (format != 'p')
2628 : {
1469 peter 2629 UIC 0 : pg_log_error("WAL directory location can only be specified in plain mode");
366 tgl 2630 LBC 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
3420 fujii 2631 0 : exit(1);
2632 : }
2633 :
3420 fujii 2634 ECB : /* clean up xlog directory name, check it's absolute */
3420 fujii 2635 GIC 1 : canonicalize_path(xlog_dir);
3420 fujii 2636 CBC 1 : if (!is_absolute_path(xlog_dir))
2637 : {
1469 peter 2638 UIC 0 : pg_log_error("WAL directory location must be an absolute path");
366 tgl 2639 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
3420 fujii 2640 0 : exit(1);
2641 : }
2642 : }
2643 :
2644 : /*
2645 : * Sanity checks for progress reporting options.
2646 : */
1116 fujii 2647 GIC 144 : if (showprogress && !estimatesize)
1116 fujii 2648 ECB : {
1028 peter 2649 UIC 0 : pg_log_error("%s and %s are incompatible options",
2650 : "--progress", "--no-estimate-size");
366 tgl 2651 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
1116 fujii 2652 0 : exit(1);
2653 : }
2654 :
2655 : /*
2656 : * Sanity checks for backup manifest options.
2657 : */
1101 rhaas 2658 GIC 144 : if (!manifest && manifest_checksums != NULL)
1101 rhaas 2659 ECB : {
1028 peter 2660 UIC 0 : pg_log_error("%s and %s are incompatible options",
2661 : "--no-manifest", "--manifest-checksums");
366 tgl 2662 LBC 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
1101 rhaas 2663 UBC 0 : exit(1);
2664 : }
2665 :
1101 rhaas 2666 GIC 144 : if (!manifest && manifest_force_encode)
2667 : {
1028 peter 2668 UIC 0 : pg_log_error("%s and %s are incompatible options",
2669 : "--no-manifest", "--manifest-force-encode");
366 tgl 2670 LBC 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
1101 rhaas 2671 0 : exit(1);
2672 : }
2673 :
2362 rhaas 2674 ECB : /* connection in replication mode to server */
2362 rhaas 2675 GBC 144 : conn = GetConnection();
2362 rhaas 2676 GIC 144 : if (!conn)
2677 : {
2362 rhaas 2678 ECB : /* Error message already written in GetConnection() */
2362 rhaas 2679 GIC 2 : exit(1);
2680 : }
1562 peter 2681 142 : atexit(disconnect_atexit);
2362 rhaas 2682 ECB :
2683 : #ifndef WIN32
2684 :
2685 : /*
2686 : * Trap SIGCHLD to be able to handle the WAL stream process exiting. There
2687 : * is no SIGCHLD on Windows, there we rely on the background thread
332 tgl 2688 : * setting the signal variable on unexpected but graceful exit. If the WAL
2689 : * stream thread crashes on Windows it will bring down the entire process
2690 : * as it's a thread, so there is nothing to catch should that happen. A
2691 : * crash on UNIX will be caught by the signal handler.
410 dgustafsson 2692 : */
410 dgustafsson 2693 GBC 142 : pqsignal(SIGCHLD, sigchld_handler);
410 dgustafsson 2694 ECB : #endif
2695 :
2696 : /*
1828 sfrost 2697 : * Set umask so that directories/files are created with the same
2698 : * permissions as directories/files in the source data directory.
2699 : *
2700 : * pg_mode_mask is set to owner-only by default and then updated in
2701 : * GetConnection() where we get the mode from the server-side with
2702 : * RetrieveDataDirCreatePerm() and then call SetDataDirectoryCreatePerm().
2703 : */
1828 sfrost 2704 GIC 142 : umask(pg_mode_mask);
2705 :
2706 : /* Backup manifests are supported in 13 and newer versions */
1088 michael 2707 142 : if (PQserverVersion(conn) < MINIMUM_VERSION_FOR_MANIFESTS)
1088 michael 2708 UIC 0 : manifest = false;
2709 :
2710 : /*
2711 : * If an output directory was specified, verify that it exists, or create
2712 : * it. Note that for a tar backup, an output directory of "-" means we are
2713 : * writing to stdout, so do nothing in that case.
2714 : */
509 rhaas 2715 GIC 142 : if (basedir != NULL && (format == 'p' || strcmp(basedir, "-") != 0))
1828 sfrost 2716 127 : verify_dir_is_empty_or_create(basedir, &made_new_pgdata, &found_existing_pgdata);
2717 :
2718 : /* determine remote server's xlog segment size */
2028 andres 2719 142 : if (!RetrieveWalSegSize(conn))
1562 peter 2720 UIC 0 : exit(1);
2721 :
2722 : /* Create pg_wal symlink, if required */
2048 peter_e 2723 GIC 142 : if (xlog_dir)
2724 : {
2725 : char *linkloc;
2726 :
2400 2727 1 : verify_dir_is_empty_or_create(xlog_dir, &made_new_xlogdir, &found_existing_xlogdir);
2728 :
2729 : /*
2730 : * Form name of the place where the symlink must go. pg_xlog has been
2731 : * renamed to pg_wal in post-10 clusters.
2732 : */
2362 rhaas 2733 1 : linkloc = psprintf("%s/%s", basedir,
2118 tgl 2734 1 : PQserverVersion(conn) < MINIMUM_VERSION_FOR_PG_WAL ?
2735 : "pg_xlog" : "pg_wal");
2736 :
3420 fujii 2737 1 : if (symlink(xlog_dir, linkloc) != 0)
366 tgl 2738 UIC 0 : pg_fatal("could not create symbolic link \"%s\": %m", linkloc);
3420 fujii 2739 GIC 1 : free(linkloc);
2740 : }
2741 :
382 rhaas 2742 142 : BaseBackup(compression_algorithm, compression_detail, compressloc,
2743 : &client_compress);
2744 :
2400 peter_e 2745 117 : success = true;
4459 magnus 2746 117 : return 0;
2747 : }
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