PostgreSQL Source Code  git master
relfilenumber.c File Reference
#include "postgres_fe.h"
#include <sys/stat.h>
#include "access/transam.h"
#include "catalog/pg_class_d.h"
#include "pg_upgrade.h"
Include dependency graph for relfilenumber.c:

Go to the source code of this file.

Functions

static void transfer_single_new_db (FileNameMap *maps, int size, char *old_tablespace)
 
static void transfer_relfile (FileNameMap *map, const char *type_suffix, bool vm_must_add_frozenbit)
 
void transfer_all_new_tablespaces (DbInfoArr *old_db_arr, DbInfoArr *new_db_arr, char *old_pgdata, char *new_pgdata)
 
void transfer_all_new_dbs (DbInfoArr *old_db_arr, DbInfoArr *new_db_arr, char *old_pgdata, char *new_pgdata, char *old_tablespace)
 

Function Documentation

◆ transfer_all_new_dbs()

void transfer_all_new_dbs ( DbInfoArr old_db_arr,
DbInfoArr new_db_arr,
char *  old_pgdata,
char *  new_pgdata,
char *  old_tablespace 
)

Definition at line 86 of file relfilenumber.c.

88 {
89  int old_dbnum,
90  new_dbnum;
91 
92  /* Scan the old cluster databases and transfer their files */
93  for (old_dbnum = new_dbnum = 0;
94  old_dbnum < old_db_arr->ndbs;
95  old_dbnum++, new_dbnum++)
96  {
97  DbInfo *old_db = &old_db_arr->dbs[old_dbnum],
98  *new_db = NULL;
99  FileNameMap *mappings;
100  int n_maps;
101 
102  /*
103  * Advance past any databases that exist in the new cluster but not in
104  * the old, e.g. "postgres". (The user might have removed the
105  * 'postgres' database from the old cluster.)
106  */
107  for (; new_dbnum < new_db_arr->ndbs; new_dbnum++)
108  {
109  new_db = &new_db_arr->dbs[new_dbnum];
110  if (strcmp(old_db->db_name, new_db->db_name) == 0)
111  break;
112  }
113 
114  if (new_dbnum >= new_db_arr->ndbs)
115  pg_fatal("old database \"%s\" not found in the new cluster",
116  old_db->db_name);
117 
118  mappings = gen_db_file_maps(old_db, new_db, &n_maps, old_pgdata,
119  new_pgdata);
120  if (n_maps)
121  {
122  transfer_single_new_db(mappings, n_maps, old_tablespace);
123  }
124  /* We allocate something even for n_maps == 0 */
125  pg_free(mappings);
126  }
127 }
void pg_free(void *ptr)
Definition: fe_memutils.c:105
FileNameMap * gen_db_file_maps(DbInfo *old_db, DbInfo *new_db, int *nmaps, const char *old_pgdata, const char *new_pgdata)
Definition: info.c:40
#define pg_fatal(...)
static void transfer_single_new_db(FileNameMap *maps, int size, char *old_tablespace)
DbInfo * dbs
Definition: pg_upgrade.h:195
char * db_name
Definition: pg_upgrade.h:175

References DbInfo::db_name, DbInfoArr::dbs, gen_db_file_maps(), DbInfoArr::ndbs, pg_fatal, pg_free(), and transfer_single_new_db().

Referenced by parallel_transfer_all_new_dbs().

◆ transfer_all_new_tablespaces()

void transfer_all_new_tablespaces ( DbInfoArr old_db_arr,
DbInfoArr new_db_arr,
char *  old_pgdata,
char *  new_pgdata 
)

Definition at line 29 of file relfilenumber.c.

31 {
32  switch (user_opts.transfer_mode)
33  {
35  prep_status_progress("Cloning user relation files");
36  break;
37  case TRANSFER_MODE_COPY:
38  prep_status_progress("Copying user relation files");
39  break;
40  case TRANSFER_MODE_LINK:
41  prep_status_progress("Linking user relation files");
42  break;
43  }
44 
45  /*
46  * Transferring files by tablespace is tricky because a single database
47  * can use multiple tablespaces. For non-parallel mode, we just pass a
48  * NULL tablespace path, which matches all tablespaces. In parallel mode,
49  * we pass the default tablespace and all user-created tablespaces and let
50  * those operations happen in parallel.
51  */
52  if (user_opts.jobs <= 1)
53  parallel_transfer_all_new_dbs(old_db_arr, new_db_arr, old_pgdata,
54  new_pgdata, NULL);
55  else
56  {
57  int tblnum;
58 
59  /* transfer default tablespace */
60  parallel_transfer_all_new_dbs(old_db_arr, new_db_arr, old_pgdata,
61  new_pgdata, old_pgdata);
62 
63  for (tblnum = 0; tblnum < os_info.num_old_tablespaces; tblnum++)
65  new_db_arr,
66  old_pgdata,
67  new_pgdata,
68  os_info.old_tablespaces[tblnum]);
69  /* reap all children */
70  while (reap_child(true) == true)
71  ;
72  }
73 
75  check_ok();
76 }
void parallel_transfer_all_new_dbs(DbInfoArr *old_db_arr, DbInfoArr *new_db_arr, char *old_pgdata, char *new_pgdata, char *old_tablespace)
Definition: parallel.c:172
bool reap_child(bool wait_for_child)
Definition: parallel.c:278
static void check_ok(void)
Definition: initdb.c:2034
OSInfo os_info
Definition: pg_upgrade.c:65
@ TRANSFER_MODE_COPY
Definition: pg_upgrade.h:236
@ TRANSFER_MODE_LINK
Definition: pg_upgrade.h:237
@ TRANSFER_MODE_CLONE
Definition: pg_upgrade.h:235
void void prep_status_progress(const char *fmt,...) pg_attribute_printf(1
void end_progress_output(void)
Definition: util.c:43
UserOpts user_opts
Definition: option.c:29
int num_old_tablespaces
Definition: pg_upgrade.h:324
char ** old_tablespaces
Definition: pg_upgrade.h:323
transferMode transfer_mode
Definition: pg_upgrade.h:304
int jobs
Definition: pg_upgrade.h:305

References check_ok(), end_progress_output(), UserOpts::jobs, OSInfo::num_old_tablespaces, OSInfo::old_tablespaces, os_info, parallel_transfer_all_new_dbs(), prep_status_progress(), reap_child(), UserOpts::transfer_mode, TRANSFER_MODE_CLONE, TRANSFER_MODE_COPY, TRANSFER_MODE_LINK, and user_opts.

Referenced by main().

◆ transfer_relfile()

static void transfer_relfile ( FileNameMap map,
const char *  type_suffix,
bool  vm_must_add_frozenbit 
)
static

Definition at line 173 of file relfilenumber.c.

174 {
175  char old_file[MAXPGPATH];
176  char new_file[MAXPGPATH];
177  int segno;
178  char extent_suffix[65];
179  struct stat statbuf;
180 
181  /*
182  * Now copy/link any related segments as well. Remember, PG breaks large
183  * files into 1GB segments, the first segment has no extension, subsequent
184  * segments are named relfilenumber.1, relfilenumber.2, relfilenumber.3.
185  */
186  for (segno = 0;; segno++)
187  {
188  if (segno == 0)
189  extent_suffix[0] = '\0';
190  else
191  snprintf(extent_suffix, sizeof(extent_suffix), ".%d", segno);
192 
193  snprintf(old_file, sizeof(old_file), "%s%s/%u/%u%s%s",
194  map->old_tablespace,
196  map->db_oid,
197  map->relfilenumber,
198  type_suffix,
199  extent_suffix);
200  snprintf(new_file, sizeof(new_file), "%s%s/%u/%u%s%s",
201  map->new_tablespace,
203  map->db_oid,
204  map->relfilenumber,
205  type_suffix,
206  extent_suffix);
207 
208  /* Is it an extent, fsm, or vm file? */
209  if (type_suffix[0] != '\0' || segno != 0)
210  {
211  /* Did file open fail? */
212  if (stat(old_file, &statbuf) != 0)
213  {
214  /* File does not exist? That's OK, just return */
215  if (errno == ENOENT)
216  return;
217  else
218  pg_fatal("error while checking for file existence \"%s.%s\" (\"%s\" to \"%s\"): %s",
219  map->nspname, map->relname, old_file, new_file,
220  strerror(errno));
221  }
222 
223  /* If file is empty, just return */
224  if (statbuf.st_size == 0)
225  return;
226  }
227 
228  unlink(new_file);
229 
230  /* Copying files might take some time, so give feedback. */
231  pg_log(PG_STATUS, "%s", old_file);
232 
233  if (vm_must_add_frozenbit && strcmp(type_suffix, "_vm") == 0)
234  {
235  /* Need to rewrite visibility map format */
236  pg_log(PG_VERBOSE, "rewriting \"%s\" to \"%s\"",
237  old_file, new_file);
238  rewriteVisibilityMap(old_file, new_file, map->nspname, map->relname);
239  }
240  else
241  switch (user_opts.transfer_mode)
242  {
243  case TRANSFER_MODE_CLONE:
244  pg_log(PG_VERBOSE, "cloning \"%s\" to \"%s\"",
245  old_file, new_file);
246  cloneFile(old_file, new_file, map->nspname, map->relname);
247  break;
248  case TRANSFER_MODE_COPY:
249  pg_log(PG_VERBOSE, "copying \"%s\" to \"%s\"",
250  old_file, new_file);
251  copyFile(old_file, new_file, map->nspname, map->relname);
252  break;
253  case TRANSFER_MODE_LINK:
254  pg_log(PG_VERBOSE, "linking \"%s\" to \"%s\"",
255  old_file, new_file);
256  linkFile(old_file, new_file, map->nspname, map->relname);
257  }
258  }
259 }
void linkFile(const char *src, const char *dst, const char *schemaName, const char *relName)
Definition: file.c:150
void rewriteVisibilityMap(const char *fromfile, const char *tofile, const char *schemaName, const char *relName)
Definition: file.c:176
void cloneFile(const char *src, const char *dst, const char *schemaName, const char *relName)
Definition: file.c:38
void copyFile(const char *src, const char *dst, const char *schemaName, const char *relName)
Definition: file.c:81
#define MAXPGPATH
void void pg_log(eLogType type, const char *fmt,...) pg_attribute_printf(2
@ PG_STATUS
Definition: pg_upgrade.h:246
@ PG_VERBOSE
Definition: pg_upgrade.h:245
#define strerror
Definition: port.h:251
#define snprintf
Definition: port.h:238
const char * new_tablespace
Definition: pg_upgrade.h:159
const char * old_tablespace_suffix
Definition: pg_upgrade.h:160
const char * old_tablespace
Definition: pg_upgrade.h:158
RelFileNumber relfilenumber
Definition: pg_upgrade.h:163
char * relname
Definition: pg_upgrade.h:166
char * nspname
Definition: pg_upgrade.h:165
const char * new_tablespace_suffix
Definition: pg_upgrade.h:161
#define stat
Definition: win32_port.h:292

References cloneFile(), copyFile(), FileNameMap::db_oid, linkFile(), MAXPGPATH, FileNameMap::new_tablespace, FileNameMap::new_tablespace_suffix, FileNameMap::nspname, FileNameMap::old_tablespace, FileNameMap::old_tablespace_suffix, pg_fatal, pg_log(), PG_STATUS, PG_VERBOSE, FileNameMap::relfilenumber, FileNameMap::relname, rewriteVisibilityMap(), snprintf, stat::st_size, stat, strerror, UserOpts::transfer_mode, TRANSFER_MODE_CLONE, TRANSFER_MODE_COPY, TRANSFER_MODE_LINK, and user_opts.

Referenced by transfer_single_new_db().

◆ transfer_single_new_db()

static void transfer_single_new_db ( FileNameMap maps,
int  size,
char *  old_tablespace 
)
static

Definition at line 135 of file relfilenumber.c.

136 {
137  int mapnum;
138  bool vm_must_add_frozenbit = false;
139 
140  /*
141  * Do we need to rewrite visibilitymap?
142  */
145  vm_must_add_frozenbit = true;
146 
147  for (mapnum = 0; mapnum < size; mapnum++)
148  {
149  if (old_tablespace == NULL ||
150  strcmp(maps[mapnum].old_tablespace, old_tablespace) == 0)
151  {
152  /* transfer primary file */
153  transfer_relfile(&maps[mapnum], "", vm_must_add_frozenbit);
154 
155  /*
156  * Copy/link any fsm and vm files, if they exist
157  */
158  transfer_relfile(&maps[mapnum], "_fsm", vm_must_add_frozenbit);
159  transfer_relfile(&maps[mapnum], "_vm", vm_must_add_frozenbit);
160  }
161  }
162 }
ClusterInfo new_cluster
Definition: pg_upgrade.c:64
ClusterInfo old_cluster
Definition: pg_upgrade.c:63
#define VISIBILITY_MAP_FROZEN_BIT_CAT_VER
Definition: pg_upgrade.h:108
static void transfer_relfile(FileNameMap *map, const char *type_suffix, bool vm_must_add_frozenbit)
ControlData controldata
Definition: pg_upgrade.h:261
uint32 cat_ver
Definition: pg_upgrade.h:207
static const pg_conv_map maps[]

References ControlData::cat_ver, ClusterInfo::controldata, maps, new_cluster, old_cluster, transfer_relfile(), and VISIBILITY_MAP_FROZEN_BIT_CAT_VER.

Referenced by transfer_all_new_dbs().