forked from AbleOS/ableos
vfs: readdir and finddir operations in FsNode
This commit is contained in:
parent
c63fbabc42
commit
9462350de7
|
@ -21,11 +21,18 @@ use spin::Lazy;
|
|||
use crate::handle::Handle;
|
||||
|
||||
use self::errors::FsError;
|
||||
use FsResult as Result;
|
||||
|
||||
pub type FsOpenOperation = fn(/* TODO: flags */) -> Result<Handle, FsError>;
|
||||
pub type FsCloseOperation = fn(fd: Handle) -> Result<(), FsError>;
|
||||
pub type FsReadOperation = fn(fd: Handle, offset: u32, size: u32) -> Result<Box<[u8]>, FsError>;
|
||||
pub type FsWriteOperation = fn(fd: Handle, offset: u32, buffer: Box<[u8]>) -> Result<(), FsError>;
|
||||
pub type FsResult<T> = core::result::Result<T, FsError>;
|
||||
|
||||
pub type FsOpenOperation = fn(node: &FsNode /* TODO: flags */) -> Result<Handle>;
|
||||
pub type FsCloseOperation = fn(node: &FsNode) -> Result<()>;
|
||||
pub type FsReadOperation = fn(node: &FsNode, offset: u32, size: u32)
|
||||
-> Result<Box<[u8]>>;
|
||||
pub type FsWriteOperation = fn(node: &FsNode, offset: u32, buffer: Box<[u8]>)
|
||||
-> Result<()>;
|
||||
pub type FsReaddirOperation = fn(node: &FsNode, index: u32) -> Result<DirectoryEntry>;
|
||||
pub type FsFinddirOperation = fn(node: &FsNode, name: &str) -> Result<FsNode>;
|
||||
|
||||
/// A VFS node, that can either be a file or a directory.
|
||||
pub struct FsNode {
|
||||
|
@ -41,40 +48,57 @@ pub struct FsNode {
|
|||
close: Option<FsCloseOperation>,
|
||||
read: Option<FsReadOperation>,
|
||||
write: Option<FsWriteOperation>,
|
||||
readdir: Option<FsReaddirOperation>,
|
||||
finddir: Option<FsFinddirOperation>,
|
||||
// todo: permissions mask
|
||||
// todo: owning user/group
|
||||
// todo: readdir, finddir fn pointers
|
||||
}
|
||||
|
||||
impl FsNode {
|
||||
// TODO: make this take flags
|
||||
fn open(&self) -> Result<Handle, FsError> {
|
||||
fn open(&self) -> Result<Handle> {
|
||||
if let Some(open) = self.open {
|
||||
open()
|
||||
open(self)
|
||||
} else {
|
||||
Err(FsError::UnsupportedOperation)
|
||||
}
|
||||
}
|
||||
|
||||
fn close(&self, fd: Handle) -> Result<(), FsError> {
|
||||
fn close(&self) -> Result<()> {
|
||||
if let Some(close) = self.close {
|
||||
close(fd)
|
||||
close(self)
|
||||
} else {
|
||||
Err(FsError::UnsupportedOperation)
|
||||
}
|
||||
}
|
||||
|
||||
fn read(&self, fd: Handle, offset: u32, size: u32) -> Result<Box<[u8]>, FsError> {
|
||||
fn read(&self, offset: u32, size: u32) -> Result<Box<[u8]>> {
|
||||
if let Some(read) = self.read {
|
||||
read(fd, offset, size)
|
||||
read(self, offset, size)
|
||||
} else {
|
||||
Err(FsError::UnsupportedOperation)
|
||||
}
|
||||
}
|
||||
|
||||
fn write(&self, fd: Handle, offset: u32, buffer: Box<[u8]>) -> Result<(), FsError> {
|
||||
fn write(&self, offset: u32, buffer: Box<[u8]>) -> Result<()> {
|
||||
if let Some(write) = self.write {
|
||||
write(fd, offset, buffer)
|
||||
write(self, offset, buffer)
|
||||
} else {
|
||||
Err(FsError::UnsupportedOperation)
|
||||
}
|
||||
}
|
||||
|
||||
fn readdir(&self, index: u32) -> Result<DirectoryEntry> {
|
||||
if let Some(readdir) = self.readdir {
|
||||
readdir(self, index)
|
||||
} else {
|
||||
Err(FsError::UnsupportedOperation)
|
||||
}
|
||||
}
|
||||
|
||||
fn finddir(&self, name: &str) -> Result<FsNode> {
|
||||
if let Some(finddir) = self.finddir {
|
||||
finddir(self, name)
|
||||
} else {
|
||||
Err(FsError::UnsupportedOperation)
|
||||
}
|
||||
|
@ -96,6 +120,11 @@ bitflags! {
|
|||
}
|
||||
}
|
||||
|
||||
pub struct DirectoryEntry {
|
||||
name: String,
|
||||
inode: u32,
|
||||
}
|
||||
|
||||
pub static FILE_SYSTEM: Lazy<spin::Mutex<Synced<Ext2<Size1024, Vec<u8>>>>> =
|
||||
Lazy::new(|| spin::Mutex::new(load_fs()));
|
||||
|
||||
|
|
Loading…
Reference in a new issue