libnvdimm: handle locked label storage areas

Per the latest version of the "NVDIMM DSM Interface Example" [1], the
label data retrieval routine can report a "locked" status. In this case
all regions associated with that DIMM are disabled until the label area
is unlocked. Provide generic libnvdimm enabling for NVDIMMs with label
data area locking capabilities.

[1]: http://pmem.io/documents/

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h
index ede5c6a62164..7ad3863cb88b 100644
--- a/include/uapi/linux/ndctl.h
+++ b/include/uapi/linux/ndctl.h
@@ -169,6 +169,7 @@ enum {
 enum {
         ND_ARS_VOLATILE = 1,
         ND_ARS_PERSISTENT = 2,
+        ND_CONFIG_LOCKED = 1,
 };
 
 static inline const char *nvdimm_bus_cmd_name(unsigned cmd)