From: NeilBrown <neilb@suse.com>
Date: Thu, 10 Mar 2016 07:06:59 +0000 (+1100)
Subject: ddf: use 64bit 'size', not 32bit 'info->size' for create.
X-Git-Tag: mdadm-4.0~115
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eddaacc304ba34a28ebba4b0239dd2da072b54bb;p=thirdparty%2Fmdadm.git

ddf: use 64bit 'size', not 32bit 'info->size' for create.

The 'size' field of mdu_disk_info_t is 32bit and should not be used
except for legacy ioctls.  super-ddf got this wrong :-(

This change makes it possible to create ddf arrays which used more than
2TB of each device.

Reported-by: Dan Russell <dpr@aol.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---

diff --git a/super-ddf.c b/super-ddf.c
index faaf0a7c..1707ad1e 100644
--- a/super-ddf.c
+++ b/super-ddf.c
@@ -2688,10 +2688,10 @@ static int init_super_ddf_bvd(struct supertype *st,
 		free(vcl);
 		return 0;
 	}
-	vc->blocks = cpu_to_be64(info->size * 2);
+	vc->blocks = cpu_to_be64(size * 2);
 	vc->array_blocks = cpu_to_be64(
 		calc_array_size(info->level, info->raid_disks, info->layout,
-				info->chunk_size, info->size*2));
+				info->chunk_size, size * 2));
 	memset(vc->pad1, 0xff, 8);
 	vc->spare_refs[0] = cpu_to_be32(0xffffffff);
 	vc->spare_refs[1] = cpu_to_be32(0xffffffff);