48 lines
1.4 KiB
Rust
48 lines
1.4 KiB
Rust
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
use aster_util::printer::VmPrinter;
|
|
|
|
use super::TidDirOps;
|
|
use crate::{
|
|
fs::{
|
|
procfs::template::{FileOps, ProcFileBuilder},
|
|
utils::{Inode, mkmod},
|
|
},
|
|
prelude::*,
|
|
process::{Process, Uid},
|
|
};
|
|
|
|
/// Represents the inode at `/proc/[pid]/task/[tid]/uid_map` (and also `/proc/[pid]/uid_map`).
|
|
#[expect(dead_code)]
|
|
pub struct UidMapFileOps(Arc<Process>);
|
|
|
|
impl UidMapFileOps {
|
|
pub fn new_inode(dir: &TidDirOps, parent: Weak<dyn Inode>) -> Arc<dyn Inode> {
|
|
let process_ref = dir.process_ref.clone();
|
|
// Reference: <https://elixir.bootlin.com/linux/v6.16.5/source/fs/proc/base.c#L3402>
|
|
ProcFileBuilder::new(Self(process_ref), mkmod!(a+r, u+w))
|
|
.parent(parent)
|
|
.build()
|
|
.unwrap()
|
|
}
|
|
}
|
|
|
|
impl FileOps for UidMapFileOps {
|
|
fn read_at(&self, offset: usize, writer: &mut VmWriter) -> Result<usize> {
|
|
let mut printer = VmPrinter::new_skip(writer, offset);
|
|
|
|
// This is the default UID map for the initial user namespace.
|
|
// TODO: Retrieve the UID map from the user namespace of the current process
|
|
// instead of returning this hard-coded value.
|
|
writeln!(
|
|
printer,
|
|
"{:>10} {:>10} {:>10}",
|
|
0,
|
|
0,
|
|
u32::from(Uid::INVALID)
|
|
)?;
|
|
|
|
Ok(printer.bytes_written())
|
|
}
|
|
}
|