tree f01260723348738076becc9f62872d87819f3159
parent 19052c0e85a3e9d3b7d190b29fcdbf0e6c105381
author NeilBrown <neilb@suse.de> 1217915653 +1000
committer NeilBrown <neilb@suse.de> 1217915791 +1000

Restore force switch of md array to readonly at reboot time.

A recent patch allowed do_md_stop to know whether it was being called
via an ioctl or not, and thus where to allow for an extra open file
descriptor when checking if it is in use.
This broke then switch to readonly performed by the shutdown notifier,
which needs to work even when the array is still (apparently) active
(as md doesn't get told when the filesystem becomes readonly).

So restore this feature by pretending that there can be lots of
file descriptors open, but we still want do_md_stop to switch to
readonly.

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