validate ptrack_lsn to InvalidXLogRecPtr

gsmolk · gsmolk · commit 6c2050f1d536 · 2017-10-05T12:19:36.000+03:00
diff --git a/src/backup.c b/src/backup.c
@@ -596,7 +596,7 @@ do_backup_instance(void)
 	{
 		XLogRecPtr	ptrack_lsn = get_last_ptrack_lsn();
 
-		if (ptrack_lsn > prev_backup->stop_lsn)
+		if (ptrack_lsn > prev_backup->stop_lsn || ptrack_lsn == InvalidXLogRecPtr)
 		{
 			elog(ERROR, "LSN from ptrack_control %lx differs from STOP LSN of previous backup %lx.\n"
 						"Create new full backup before an incremental one.",

Original file line number	Diff line number	Diff line change
`@@ -596,7 +596,7 @@ do_backup_instance(void)`
`596`	`596`	`{`
`597`	`597`	`XLogRecPtr ptrack_lsn = get_last_ptrack_lsn();`
`598`	`598`
`599`		`- if (ptrack_lsn > prev_backup->stop_lsn)`
	`599`	`+ if (ptrack_lsn > prev_backup->stop_lsn \|\| ptrack_lsn == InvalidXLogRecPtr)`
`600`	`600`	`{`
`601`	`601`	`elog(ERROR, "LSN from ptrack_control %lx differs from STOP LSN of previous backup %lx.\n"`
`602`	`602`	`"Create new full backup before an incremental one.",`