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use alloc::{Vec, String, rc::{Rc, Weak}};
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use core::cell::RefCell;
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use core::mem::size_of;
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use core;
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use core::fmt::Debug;
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/// Abstract operations on a inode.
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pub trait INode: Debug {
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fn open(&mut self, flags: u32) -> Result<()>;
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fn close(&mut self) -> Result<()>;
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fn read_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize>;
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fn write_at(&self, offset: usize, buf: &[u8]) -> Result<usize>;
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fn info(&self) -> Result<FileInfo>;
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fn sync(&mut self) -> Result<()>;
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// fn name_file(&mut self) -> Result<()>;
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// fn reclaim(&mut self) -> Result<()>;
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// fn try_seek(&mut self, offset: u64) -> Result<()>;
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fn resize(&mut self, len: usize) -> Result<()>;
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fn create(&mut self, name: &'static str, type_: FileType) -> Result<Rc<RefCell<INode>>>;
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fn lookup(&self, path: &'static str) -> Result<Rc<RefCell<INode>>>;
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fn list(&self) -> Result<Vec<String>>;
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// fn io_ctrl(&mut self, op: u32, data: &[u8]) -> Result<()>;
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}
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#[derive(Debug, Eq, PartialEq)]
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pub struct FileInfo {
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pub size: usize,
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pub mode: u32,
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pub type_: FileType,
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pub blocks: usize,
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}
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#[derive(Debug, Eq, PartialEq)]
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pub enum FileType {
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File, Dir,
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}
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pub type Result<T> = core::result::Result<T, ()>;
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/// Abstract filesystem
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pub trait FileSystem {
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fn sync(&self) -> Result<()>;
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fn root_inode(&self) -> Rc<RefCell<INode>>;
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// fn unmount(&self) -> Result<()>;
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// fn cleanup(&self);
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} |
