• Dan Williams's avatar
    libnvdimm: blk labels and namespace instantiation · 1b40e09a
    Dan Williams authored
    A blk label set describes a namespace comprised of one or more
    discontiguous dpa ranges on a single dimm.  They may alias with one or
    more pmem interleave sets that include the given dimm.
    
    This is the runtime/volatile configuration infrastructure for sysfs
    manipulation of 'alt_name', 'uuid', 'size', and 'sector_size'.  A later
    patch will make these settings persistent by writing back the label(s).
    
    Unlike pmem namespaces, multiple blk namespaces can be created per
    region.  Once a blk namespace has been created a new seed device
    (unconfigured child of a parent blk region) is instantiated.  As long as
    a region has 'available_size' != 0 new child namespaces may be created.
    
    Cc: Greg KH <gregkh@linuxfoundation.org>
    Cc: Neil Brown <neilb@suse.de>
    Acked-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
    1b40e09a
namespace_devs.c 37.4 KB