From 0fde6edbae7fc11e9ba4e4b190be5bda570468b9 Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sat, 12 Sep 2020 10:39:30 -0400
Subject: Delete filesystem.rs

It's very incomplete and not useful at the moment.
---
 rust/kernel/src/filesystem.rs | 84 -------------------------------------------
 1 file changed, 84 deletions(-)
 delete mode 100644 rust/kernel/src/filesystem.rs

diff --git a/rust/kernel/src/filesystem.rs b/rust/kernel/src/filesystem.rs
deleted file mode 100644
index a5b7774292f1..000000000000
--- a/rust/kernel/src/filesystem.rs
+++ /dev/null
@@ -1,84 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-// TODO: `filesystem` is really incomplete -- deletion to be considered
-
-use alloc::boxed::Box;
-use core::default::Default;
-use core::marker;
-
-use crate::bindings;
-use crate::c_types;
-use crate::error;
-use crate::types::CStr;
-
-pub struct Registration<T: FileSystem> {
-    _phantom: marker::PhantomData<T>,
-    ptr: Box<bindings::file_system_type>,
-}
-
-// This is safe because Registration doesn't actually expose any methods.
-unsafe impl<T> Sync for Registration<T> where T: FileSystem {}
-
-impl<T: FileSystem> Drop for Registration<T> {
-    fn drop(&mut self) {
-        unsafe { bindings::unregister_filesystem(&mut *self.ptr) };
-    }
-}
-
-pub trait FileSystem: Sync {
-    const NAME: &'static CStr;
-    const FLAGS: FileSystemFlags;
-}
-
-bitflags::bitflags! {
-    pub struct FileSystemFlags: c_types::c_int {
-        const REQUIRES_DEV = bindings::FS_REQUIRES_DEV as c_types::c_int;
-        const BINARY_MOUNTDATA = bindings::FS_BINARY_MOUNTDATA as c_types::c_int;
-        const HAS_SUBTYPE = bindings::FS_HAS_SUBTYPE as c_types::c_int;
-        const USERNS_MOUNT = bindings::FS_USERNS_MOUNT as c_types::c_int;
-        const RENAME_DOES_D_MOVE = bindings::FS_RENAME_DOES_D_MOVE as c_types::c_int;
-    }
-}
-
-extern "C" fn fill_super_callback<T: FileSystem>(
-    _sb: *mut bindings::super_block,
-    _data: *mut c_types::c_void,
-    _silent: c_types::c_int,
-) -> c_types::c_int {
-    // T::fill_super(...)
-    // This should actually create an object that gets dropped by
-    // file_system_registration::kill_sb. You can point to it with
-    // sb->s_fs_info.
-    unimplemented!();
-}
-
-extern "C" fn mount_callback<T: FileSystem>(
-    fs_type: *mut bindings::file_system_type,
-    flags: c_types::c_int,
-    _dev_name: *const c_types::c_char,
-    data: *mut c_types::c_void,
-) -> *mut bindings::dentry {
-    unsafe { bindings::mount_nodev(fs_type, flags, data, Some(fill_super_callback::<T>)) }
-}
-
-pub fn register<T: FileSystem>() -> error::KernelResult<Registration<T>> {
-    let mut fs_registration = Registration {
-        ptr: Box::new(bindings::file_system_type {
-            name: T::NAME.as_ptr() as *const i8,
-            // TODO: proper `THIS_MODULE` handling
-            owner: core::ptr::null_mut(),
-            fs_flags: T::FLAGS.bits(),
-            mount: Some(mount_callback::<T>),
-            kill_sb: Some(bindings::kill_litter_super),
-
-            ..Default::default()
-        }),
-        _phantom: marker::PhantomData,
-    };
-    let result = unsafe { bindings::register_filesystem(&mut *fs_registration.ptr) };
-    if result != 0 {
-        return Err(error::Error::from_kernel_errno(result));
-    }
-
-    Ok(fs_registration)
-}
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