From: NeilBrown <neilb@suse.de>
Date: Tue, 10 May 2011 03:09:37 +0000 (+1000)
Subject: Grow: allow auto-readonly arrays to be reshaped.
X-Git-Tag: mdadm-3.2.2~80
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=815c8a7e0b11b69331211b59b880ba50f3ed2b5e;p=thirdparty%2Fmdadm.git

Grow: allow auto-readonly arrays to be reshaped.

In an array is auto-readonly then a reshape will not start.
But auto-readonly is only wanted until something is explicitly
done to acknowledge that the array is really wanted.
So it is perfectly correct to switch an auto-readonly array to
'clean' if a reshape has been requested.

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

diff --git a/Grow.c b/Grow.c
index 5840a2c1..1e1e9f8c 100644
--- a/Grow.c
+++ b/Grow.c
@@ -521,9 +521,15 @@ static int freeze(struct supertype *st)
 	else {
 		struct mdinfo *sra = sysfs_read(-1, st->devnum, GET_VERSION);
 		int err;
+		char buf[20];
 
 		if (!sra)
 			return -1;
+		/* Need to clear any 'read-auto' status */
+		if (sysfs_get_str(sra, NULL, "array_state", buf, 20) > 0 &&
+		    strncmp(buf, "read-auto", 9) == 0)
+			sysfs_set_str(sra, NULL, "array_state", "clean");
+
 		err = sysfs_freeze_array(sra);
 		sysfs_free(sra);
 		return err;