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Fix initdb --sync-only to also sync tablespaces.

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630cd14426dc added initdb --sync-only, for use by pg_upgrade, by just
exposing the existing fsync code. That's wrong, because initdb so far
had absolutely no reason to deal with tablespaces.

Fix --sync-only by additionally explicitly syncing each of the
tablespaces.

Backpatch to 9.3 where --sync-only was introduced.

Abhijit Menon-Sen and Andres Freund
This commit is contained in:
Andres Freund 2014-11-14 18:22:12 +01:00
parent e26a920acb
commit f52b3c4463
1 changed files with 61 additions and 2 deletions
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63
src/bin/initdb/initdb.c
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@ -60,6 +60,7 @@
#include "sys/mman.h"
#endif
#include "catalog/catalog.h"
#include "common/username.h"
#include "mb/pg_wchar.h"
#include "getaddrinfo.h"
@ -218,6 +219,7 @@ static char **filter_lines_with_token(char **lines, const char *token);
static char **readfile(const char *path);
static void writefile(char *path, char **lines);
static void walkdir(char *path, void (*action) (char *fname, bool isdir));
static void walktblspc_links(char *path, void (*action) (char *fname, bool isdir));
static void pre_sync_fname(char *fname, bool isdir);
static void fsync_fname(char *fname, bool isdir);
static FILE *popen_check(const char *command, const char *mode);
@ -587,6 +589,55 @@ walkdir(char *path, void (*action) (char *fname, bool isdir))
(*action) (path, true);
}
/*
* walktblspc_links: call walkdir on each entry under the given
* pg_tblspc directory, or do nothing if pg_tblspc doesn't exist.
*/
static void
walktblspc_links(char *path, void (*action) (char *fname, bool isdir))
{
DIR *dir;
struct dirent *direntry;
char subpath[MAXPGPATH];
dir = opendir(path);
if (dir == NULL)
{
if (errno == ENOENT)
return;
fprintf(stderr, _("%s: could not open directory \"%s\": %s\n"),
progname, path, strerror(errno));
exit_nicely();
}
while (errno = 0, (direntry = readdir(dir)) != NULL)
{
if (strcmp(direntry->d_name, ".") == 0 ||
strcmp(direntry->d_name, "..") == 0)
continue;
/* fsync the version specific tablespace subdirectory */
snprintf(subpath, sizeof(subpath), "%s/%s/%s",
path, direntry->d_name, TABLESPACE_VERSION_DIRECTORY);
walkdir(subpath, action);
}
if (errno)
{
fprintf(stderr, _("%s: could not read directory \"%s\": %s\n"),
progname, path, strerror(errno));
exit_nicely();
}
if (closedir(dir))
{
fprintf(stderr, _("%s: could not close directory \"%s\": %s\n"),
progname, path, strerror(errno));
exit_nicely();
}
}
/*
* Hint to the OS that it should get ready to fsync() this file.
*/
@ -2375,6 +2426,7 @@ static void
perform_fsync(void)
{
char pdir[MAXPGPATH];
char pg_tblspc[MAXPGPATH];
fputs(_("syncing data to disk ... "), stdout);
fflush(stdout);
@ -2393,9 +2445,13 @@ perform_fsync(void)
/* first the parent of the PGDATA directory */
pre_sync_fname(pdir, true);
/* then recursively through the directory */
/* then recursively through the data directory */
walkdir(pg_data, pre_sync_fname);
/* now do the same thing for everything under pg_tblspc */
snprintf(pg_tblspc, MAXPGPATH, "%s/pg_tblspc", pg_data);
walktblspc_links(pg_tblspc, pre_sync_fname);
/*
* Now, do the fsync()s in the same order.
*/
@ -2403,9 +2459,12 @@ perform_fsync(void)
/* first the parent of the PGDATA directory */
fsync_fname(pdir, true);
/* then recursively through the directory */
/* then recursively through the data directory */
walkdir(pg_data, fsync_fname);
/* and now the same for all tablespaces */
walktblspc_links(pg_tblspc, fsync_fname);
check_ok();
}