From: Bernd Helmle <mailings@oopsware.de>
Date: Sat, 14 Sep 2013 16:24:42 +0000 (+0200)
Subject: Add GUC data_checksums to report wether checksums for database blocks are enabled.
X-Git-Url: http://git.postgresql.org/gitweb/sta%3Cscript%20data-cfasync=?a=commitdiff_plain;h=refs%2Fheads%2Fdata_checksum_guc;p=users%2Fbernd%2Fpostgres.git

Add GUC data_checksums to report wether checksums for database blocks are enabled.
---

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 23ebc11202..5a1d9ac342 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -6169,6 +6169,20 @@ dynamic_library_path = 'C:\tools\postgresql;H:\my_project\lib;$libdir'
       </listitem>
      </varlistentry>
 
+     <varlistentry id="guc-data-checksums" xreflabel="data_checksums">
+      <term><varname>data_checksums</varname> (<type>boolean</type>)</term>
+      <indexterm>
+       <primary><varname>data_checksums</> configuration parameter</primary>
+      </indexterm>
+      <listitem>
+       <para>
+        Reports wether data checksums are turned on or off for this
+        particular cluster. See <xref linkend="app-initdb-data-checksums"> for more
+        information.
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry id="guc-integer-datetimes" xreflabel="integer_datetimes">
       <term><varname>integer_datetimes</varname> (<type>boolean</type>)</term>
       <indexterm>
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 7d297bcd34..f2fccc47d2 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -199,6 +199,7 @@ static bool check_application_name(char **newval, void **extra, GucSource source
 static void assign_application_name(const char *newval, void *extra);
 static const char *show_unix_socket_permissions(void);
 static const char *show_log_file_mode(void);
+static const char *show_data_checksums(void);
 
 static char *config_enum_get_options(struct config_enum * record,
 						const char *prefix, const char *suffix,
@@ -466,6 +467,7 @@ static int	max_identifier_length;
 static int	block_size;
 static int	segment_size;
 static int	wal_block_size;
+static bool data_checksums;
 static int	wal_segment_size;
 static bool integer_datetimes;
 static int	effective_io_concurrency;
@@ -1457,6 +1459,18 @@ static struct config_bool ConfigureNamesBool[] =
 		NULL, NULL, NULL
 	},
 
+	{
+		{"data_checksums", PGC_INTERNAL, PRESET_OPTIONS,
+		 gettext_noop("Shows wether data checksums are turned on for this cluster"),
+		 NULL,
+		 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
+		},
+		&data_checksums,
+		false,
+		NULL, NULL, show_data_checksums
+	},
+
+
 	/* End-of-list marker */
 	{
 		{NULL, 0, 0, NULL, NULL}, NULL, false, NULL, NULL, NULL
@@ -8655,6 +8669,15 @@ assign_tcp_keepalives_idle(int newval, void *extra)
 	(void) pq_setkeepalivesidle(newval, MyProcPort);
 }
 
+static const char *
+show_data_checksums(void)
+{
+	if (DataChecksumsEnabled())
+		return "on";
+	else
+		return "off";
+}
+
 static const char *
 show_tcp_keepalives_idle(void)
 {