From: Adam Kwolek <adam.kwolek@intel.com>
Date: Mon, 7 Nov 2011 00:46:35 +0000 (+1100)
Subject: FIX: Do not continue container reshape when mdmon is absent
X-Git-Tag: mdadm-3.2.3~62
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4584621ab439f009d7f6a3e61b7cc91c0374065f;p=thirdparty%2Fmdadm.git

FIX: Do not continue container reshape when mdmon is absent

When mdmon is absent metadata is not updated, and container_reshape()
can fall in to endless loop. This can cause user data corruption.

In case when mdmon is absent do not continue container reshape process.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/Grow.c b/Grow.c
index e7fd7c42..184a973a 100644
--- a/Grow.c
+++ b/Grow.c
@@ -2562,6 +2562,12 @@ int reshape_container(char *container, char *devname,
 		restart = 0;
 		if (rv)
 			break;
+		rv = !mdmon_running(devname2devnum(container));
+		if (rv) {
+			printf(Name ": Mdmon is not found. "
+			       "Cannot continue container reshape.\n");
+			break;
+		}
 	}
 	if (!rv)
 		unfreeze(st);