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pg_checksums: Use new routine to retrieve data of PG_VERSION

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Previously, attempting to use pg_checksums on a cluster with a control
file whose version does not match with what thetool is able to support
would lead to the following error:
pg_checksums: error: pg_control CRC value is incorrect

This is confusing, because it would look like the control file is
corrupted.  However, the contents of the control file are correct,
pg_checksums not being able to understand how the past control file is
shaped.

This commit adds a check based on PG_VERSION, using the facility added
by cd0be131ba, using the same error message as some of the other
frontend tools.  A note is added in the documentation about the major
version requirement.

Author: Michael Banck <mbanck@gmx.net>
Discussion: https://postgr.es/m/68f1ff21.170a0220.2c9b5f.4df5@mx.google.com
This commit is contained in:
Michael Paquier
2025-10-20 09:35:22 +09:00
parent 92cf557ffa
commit a7c3042200
2 changed files with 21 additions and 0 deletions
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4
doc/src/sgml/ref/pg_checksums.sgml
View File

@@ -247,5 +247,9 @@ PostgreSQL documentation
remains unchanged, and <application>pg_checksums</application> can be
re-run to perform the same operation.
</para>
<para>
The target cluster must have the same major version as
<application>pg_checksums</application>.
</para>
</refsect1>
</refentry>

17
src/bin/pg_checksums/pg_checksums.c
View File

@@ -25,6 +25,7 @@
#include "common/logging.h"
#include "common/relpath.h"
#include "fe_utils/option_utils.h"
#include "fe_utils/version.h"
#include "getopt_long.h"
#include "pg_getopt.h"
#include "storage/bufpage.h"
@@ -448,6 +449,8 @@ main(int argc, char *argv[])
int c;
int option_index;
bool crc_ok;
uint32 major_version;
char *version_str;
pg_logging_init(argv[0]);
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_checksums"));
@@ -543,6 +546,20 @@ main(int argc, char *argv[])
exit(1);
}
/*
* Retrieve the contents of this cluster's PG_VERSION. We require
* compatibility with the same major version as the one this tool is
* compiled with.
*/
major_version = GET_PG_MAJORVERSION_NUM(get_pg_version(DataDir, &version_str));
if (major_version != PG_MAJORVERSION_NUM)
{
pg_log_error("data directory is of wrong version");
pg_log_error_detail("File \"%s\" contains \"%s\", which is not compatible with this program's version \"%s\".",
"PG_VERSION", version_str, PG_MAJORVERSION);
exit(1);
}
/* Read the control file and check compatibility */
ControlFile = get_controlfile(DataDir, &crc_ok);
if (!crc_ok)