pub trait FsMeta {
// Required methods
fn fs_type(&self) -> i64;
fn io_size(&self) -> u64;
fn block_size(&self) -> i64;
fn total_blocks(&self) -> u64;
fn free_blocks(&self) -> u64;
fn avail_blocks(&self) -> u64;
fn total_file_nodes(&self) -> u64;
fn free_file_nodes(&self) -> u64;
fn fsid(&self) -> u64;
fn namelen(&self) -> u64;
}