Fix pg_upgrade for 9.3 with data checksums.

Previous changes misconstrued pg_upgrade internals
causing build farm breakages.

Author: simonat2ndQuadrant

contrib/pg_upgrade/controldata.c

@@ -56,7 +56,7 @@ get_control_data(ClusterInfo *cluster, bool live_check)
 	bool		got_toast = false;
 	bool		got_date_is_int = false;
 	bool		got_float8_pass_by_value = false;
-	bool		got_data_checksums = false;
+	bool		got_data_checksum_version = false;
 	char	   *lc_collate = NULL;
 	char	   *lc_ctype = NULL;
 	char	   *lc_monetary = NULL;
@@ -135,8 +135,8 @@ get_control_data(ClusterInfo *cluster, bool live_check)
 	/* Only in <= 9.2 */
 	if (GET_MAJOR_VERSION(cluster->major_version) <= 902)
 	{
-		cluster->controldata.data_checksums = false;
-		got_data_checksums = true;
+		cluster->controldata.data_checksum_version = 0;
+		got_data_checksum_version = true;
 	}
 
 	/* we have the result of cmd in "output". so parse it line by line now */
@@ -401,7 +401,7 @@ get_control_data(ClusterInfo *cluster, bool live_check)
 			cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
 			got_float8_pass_by_value = true;
 		}
-		else if ((p = strstr(bufin, "checksums")) != NULL)
+		else if ((p = strstr(bufin, "checksum")) != NULL)
 		{
 			p = strchr(p, ':');
 
@@ -410,8 +410,8 @@ get_control_data(ClusterInfo *cluster, bool live_check)
 
 			p++;				/* removing ':' char */
 			/* used later for contrib check */
-			cluster->controldata.data_checksums = strstr(p, "enabled") != NULL;
-			got_data_checksums = true;
+			cluster->controldata.data_checksum_version = str2uint(p);
+			got_data_checksum_version = true;
 		}
 		/* In pre-8.4 only */
 		else if ((p = strstr(bufin, "LC_COLLATE:")) != NULL)
@@ -496,7 +496,7 @@ get_control_data(ClusterInfo *cluster, bool live_check)
 		!got_tli ||
 		!got_align || !got_blocksz || !got_largesz || !got_walsz ||
 		!got_walseg || !got_ident || !got_index || !got_toast ||
-		!got_date_is_int || !got_float8_pass_by_value || !got_data_checksums)
+		!got_date_is_int || !got_float8_pass_by_value || !got_data_checksum_version)
 	{
 		pg_log(PG_REPORT,
 			"The %s cluster lacks some required control information:\n",
@@ -556,8 +556,8 @@ get_control_data(ClusterInfo *cluster, bool live_check)
 			pg_log(PG_REPORT, "  float8 argument passing method\n");
 
 		/* value added in Postgres 9.3 */
-		if (!got_data_checksums)
-			pg_log(PG_REPORT, "  data checksums\n");
+		if (!got_data_checksum_version)
+			pg_log(PG_REPORT, "  data checksum version\n");
 
 		pg_log(PG_FATAL,
 			   "Cannot continue without required control information, terminating\n");
@@ -622,10 +622,10 @@ check_control_data(ControlData *oldctrl,
 	}
 
 	/* We might eventually allow upgrades from checksum to no-checksum clusters. */
-	if (oldctrl->data_checksums != newctrl->data_checksums)
+	if (oldctrl->data_checksum_version != newctrl->data_checksum_version)
 	{
 		pg_log(PG_FATAL,
-			   "old and new pg_controldata checksums settings are invalid or do not match\n");
+			   "old and new pg_controldata checksum versions are invalid or do not match\n");
 	}
 }
 

contrib/pg_upgrade/pg_upgrade.h

@@ -202,7 +202,7 @@ typedef struct
 	uint32		toast;
 	bool		date_is_int;
 	bool		float8_pass_by_value;
-	bool		data_checksums;
+	bool		data_checksum_version;
 	char	   *lc_collate;
 	char	   *lc_ctype;
 	char	   *encoding;