From 71d68ff62f945254240575cd836f5f2a09ced5d2 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Wed, 31 Jul 2013 09:18:57 +1000
Subject: [PATCH] Fix is_resync_complete for RAID10

For RAID10, 'sync' numbers go up to the array size rather than the
component size.  is_resync_complete() needs to allow for this.

Reported-by: Pawel Baldysiak <pawel.baldysiak@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---
 mdmon.h | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/mdmon.h b/mdmon.h
index 60fda38..5a8e120 100644
--- a/mdmon.h
+++ b/mdmon.h
@@ -91,8 +91,22 @@ extern int monitor_loop_cnt;
  */
 static inline int is_resync_complete(struct mdinfo *array)
 {
-	if (array->resync_start >= array->component_size)
-		return 1;
-	return 0;
+	unsigned long long sync_size = 0;
+	int ncopies, l;
+	switch(array->array.level) {
+	case 1:
+	case 4:
+	case 5:
+	case 6:
+		sync_size = array->component_size;
+		break;
+	case 10:
+		l = array->array.layout;
+		ncopies = (l & 0xff) * ((l >> 8) && 0xff);
+		sync_size = array->component_size * array->array.raid_disks;
+		sync_size /= ncopies;
+		break;
+	}
+	return array->resync_start >= sync_size;
 }