| // Copyright 2022 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| use crate::errors::*; |
| |
| #[derive(Debug, Copy, Clone)] |
| pub struct BlockDeviceGeometry { |
| pub block_size: usize, |
| pub block_count: usize, |
| } |
| |
| pub trait BlockDevice { |
| fn geom(&self) -> BlockDeviceGeometry; |
| fn read_block(&self, block: usize, block: &mut [u8]) -> Result<(), BFSErr>; |
| fn write_block(&mut self, block: usize, block: &[u8]) -> Result<(), BFSErr>; |
| fn erase_block(&mut self, block: usize) -> Result<(), BFSErr>; |
| |
| fn read_range(&self, addr: usize, data: &mut [u8]) -> Result<(), BFSErr>; |
| fn write_range(&mut self, addr: usize, data: &[u8]) -> Result<(), BFSErr>; |
| fn overwrite_range(&mut self, addr: usize, data: &[u8]) -> Result<(), BFSErr>; |
| } |
