Speedy_Lex
44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
use alloc::vec::Vec;
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use crate::{context, scheme, sync::CleanLockToken, syscall::error::*};
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use super::{
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copy_path_to_buf,
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usercopy::{UserSlice, UserSliceRo},
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};
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pub fn mkns(mut user_buf: UserSliceRo, token: &mut CleanLockToken) -> Result<usize> {
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let (uid, from) = {
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let ctx = context::current();
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let cx = &ctx.read(token.token());
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(cx.euid, cx.ens)
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};
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// TODO: Lift this restriction later?
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if uid != 0 {
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return Err(Error::new(EACCES));
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}
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let mut names = Vec::with_capacity(user_buf.len() / core::mem::size_of::<[usize; 2]>());
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while let Some((current_name_ptr_buf, next_part)) =
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user_buf.split_at(core::mem::size_of::<[usize; 2]>())
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{
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let mut iter = current_name_ptr_buf.usizes();
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let ptr = iter.next().ok_or(Error::new(EINVAL))??;
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let len = iter.next().ok_or(Error::new(EINVAL))??;
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let raw_path = UserSlice::new(ptr, len)?;
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// TODO: Max scheme size limit?
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let max_len = 256;
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names.push(copy_path_to_buf(raw_path, max_len)?.into_boxed_str());
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user_buf = next_part;
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}
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let to = scheme::schemes_mut(token.token()).make_ns(from, names)?;
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Ok(to.into())
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}
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