From: NeilBrown <neilb@suse.de>
Date: Thu, 10 Mar 2011 06:06:59 +0000 (+1100)
Subject: Initialise all of file when opening backup file for reshape.
X-Git-Tag: mdadm-3.1.5~37
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4622ac62c92280318b43d479e9abc4415ac2bfa;p=thirdparty%2Fmdadm.git

Initialise all of file when opening backup file for reshape.

Due to a miscalculation we didn't initialise the whole file.
There is 4K (8 sectors) for the metadata, then the data.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/Grow.c b/Grow.c
index 0571f5b0..7db54de2 100644
--- a/Grow.c
+++ b/Grow.c
@@ -1054,7 +1054,7 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
 				break;
 			}
 			memset(buf, 0, 512);
-			for (i=0; i < (signed)blocks + 1 ; i++) {
+			for (i=0; i < (signed)blocks + 8 ; i++) {
 				if (write(fdlist[d], buf, 512) != 512) {
 					fprintf(stderr, Name ": %s: cannot create backup file %s: %s\n",
 						devname, backup_file, strerror(errno));