From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Subject: [PATCH 4/4] dm-mpath: reject message when the device is
	suspended
Date: Fri, 20 Nov 2009 16:15:25 +0900
Message-ID: <4B06420D.3070702@ct.jp.nec.com>
References: <4B06408A.1080700@ct.jp.nec.com>
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To: Alasdair Kergon <agk@redhat.com>, Mike Anderson <andmike@linux.vnet.ibm.com>
Cc: device-mapper development <dm-devel@redhat.com>
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This patch rejects messages that can generate I/O while the device itself
is suspended.

Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>
Cc: Alasdair G Kergon <agk@redhat.com>
---
 drivers/md/dm-mpath.c |    5 +++++
 1 file changed, 5 insertions(+)

Index: 2.6.32-rc7/drivers/md/dm-mpath.c
===================================================================
--- 2.6.32-rc7.orig/drivers/md/dm-mpath.c
+++ 2.6.32-rc7/drivers/md/dm-mpath.c
@@ -1421,6 +1421,11 @@ static int multipath_message(struct dm_t
 
 	mutex_lock(&m->work_mutex);
 
+	if (dm_suspended(ti)) {
+		r = -EBUSY;
+		goto out;
+	}
+
 	if (argc == 1) {
 		if (!strnicmp(argv[0], MESG_STR("queue_if_no_path"))) {
 			r = queue_if_no_path(m, 1, 0);