const char * dmmp_path_blk_name_get (struct dmmp_path *dmmp_p);
Pointer of 'struct dmmp_path'. If this pointer is NULL, your program will be terminated by assert.
Retrieve block name of certain path. The example of block names are "sda", "nvme0n1".
const char *. No need to free this memory, the resources will get freed when dmmp_mpath_array_free.