tree c23d1c952ec837729700b5e3c34cdb42a073b055
parent f524bf271a5cf12a44253194abcf8b6688ff5b9d
author Dan Williams <dan.j.williams@intel.com> 1433003736 -0400
committer Dan Williams <dan.j.williams@intel.com> 1435195450 -0400

libnvdimm: write blk label set

After 'uuid', 'size', 'sector_size', and optionally 'alt_name' have been
set to valid values the labels on the dimm can be updated.  The
difference with the pmem case is that blk namespaces are limited to one
dimm and can cover discontiguous ranges in dpa space.

Also, after allocating label slots, it is useful for userspace to know
how many slots are left.  Export this information in sysfs.

Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Neil Brown <neilb@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>