commit dba034eef2456d2a9f9a76806846c97acf6c3ad1
author NeilBrown <neilb@suse.de> Tue Aug 05 15:54:13 2008 +1000
committer NeilBrown <neilb@suse.de> Tue Aug 05 15:56:32 2008 +1000
tree 3cf51b72fc5be671e986a39c389aa5332994e2a2
parent 2b25000bf5157c28d8591f03f0575248a8cbd900

Fail safely when trying to grow an array with a write-intent bitmap.

We cannot currently change the size of a write-intent bitmap.
So if we change the size of an array which has such a bitmap, it
tries to set bits beyond the end of the bitmap.

For now, simply reject any request to change the size of an array
which has a bitmap.  mdadm can remove the bitmap and add a new one
after the array has changed size.

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