From: Pawel Baldysiak <pawel.baldysiak@intel.com>
Date: Thu, 22 Dec 2016 12:10:47 +0000 (+0100)
Subject: IMSM: Do not update metadata if not able to migrate
X-Git-Tag: mdadm-4.0~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e9b2c3fb780c033f960736a982997e14fcd6222;p=thirdparty%2Fmdadm.git

IMSM: Do not update metadata if not able to migrate

This patch prevents mdadm from updating metadata if migration is
not possible. The same check is done in analyse_change(),
but in that place - metadata is already modified.

Signed-off-by: Pawel Baldysiak <pawel.baldysiak@intel.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---

diff --git a/super-intel.c b/super-intel.c
index b7a52031..df959572 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -10815,6 +10815,11 @@ enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
 			pr_err("Error. Chunk size change for RAID 10 is not supported.\n");
 			change = -1;
 			goto analyse_change_exit;
+		} else if (info.component_size % (geo->chunksize/512)) {
+			pr_err("New chunk size (%dK) does not evenly divide device size (%lluk). Aborting...\n",
+			       geo->chunksize/1024, info.component_size/2);
+			change = -1;
+			goto analyse_change_exit;
 		}
 		change = CH_MIGRATION;
 	} else {