1 use alloc::vec::Vec; 2 3 use self::cache_iter::FailData; 4 5 mod cache_block; 6 mod cache_iter; 7 pub mod cached_block_device; 8 pub const BLOCK_SIZE_LOG: usize = 9; 9 ///块大小这里固定为512 10 pub const BLOCK_SIZE: usize = 1 << BLOCK_SIZE_LOG; 11 ///这里规定Cache的threshold大小，单位为：MB 12 pub const CACHE_THRESHOLD: usize = 64; 13 14 pub enum BlockCacheError { 15 BlockSizeError, 16 InsufficientCacheSpace, 17 StaticParameterError, 18 BlockFaultError(Vec<FailData>), 19 } 20