Function nvme_scan_subsystem_namespaces 

pub unsafe extern "C" fn nvme_scan_subsystem_namespaces(
    s: nvme_subsystem_t,
    ns: *mut *mut *mut dirent,
) -> c_int

nvme_scan_subsystem_namespaces() - Scan for namespaces in a subsystem @s: Subsystem to scan @ns: Pointer to array of dirents

Return: number of entries in @ns