From: Czarnowska, Anna <anna.czarnowska@intel.com>
Date: Sun, 13 Feb 2011 22:27:09 +0000 (+1100)
Subject: fix: imsm: size must be in K for rounding to chunk
X-Git-Tag: mdadm-3.2.1~118
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=612e59d838b5480c2780a59f021eea2b32f3eb19;p=thirdparty%2Fmdadm.git

fix: imsm: size must be in K for rounding to chunk

chunk is in K so size must be converted to K before it is rounded.
Otherwise we may get wrong freesize returned
resulting in creation failure.

Signed-off-by: Anna Czarnowska <anna.czarnowska@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/super-intel.c b/super-intel.c
index 456eacc6..295aa1d0 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -4384,7 +4384,8 @@ static int reserve_space(struct supertype *st, int raiddisks,
 	maxsize = merge_extents(super, extent_cnt);
 	minsize = size;
 	if (size == 0)
-		minsize = chunk;
+		/* chunk is in K */
+		minsize = chunk * 2;
 
 	if (cnt < raiddisks ||
 	    (super->orom && used && used != raiddisks) ||
@@ -4397,8 +4398,8 @@ static int reserve_space(struct supertype *st, int raiddisks,
 	if (size == 0) {
 		size = maxsize;
 		if (chunk) {
-			size /= chunk;
-			size *= chunk;
+			size /= 2 * chunk;
+			size *= 2 * chunk;
 		}
 	}