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Add ability to contain a process in a scheme sandbox

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This commit is contained in:
Jeremy Soller 2016-11-16 20:54:38 -07:00
parent 6b8a576a21
commit d294d56b52
16 changed files with 186 additions and 73 deletions
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21
kernel/scheme/root.rs
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@ -7,19 +7,21 @@ use spin::RwLock;
use context;
use syscall::error::*;
use syscall::scheme::Scheme;
use scheme::{self, AtomicSchemeId, ATOMIC_SCHEMEID_INIT};
use scheme::{self, SchemeNamespace, SchemeId};
use scheme::user::{UserInner, UserScheme};
pub static ROOT_SCHEME_ID: AtomicSchemeId = ATOMIC_SCHEMEID_INIT;
pub struct RootScheme {
scheme_ns: SchemeNamespace,
scheme_id: SchemeId,
next_id: AtomicUsize,
handles: RwLock<BTreeMap<usize, Arc<UserInner>>>
}
impl RootScheme {
pub fn new() -> RootScheme {
pub fn new(scheme_ns: SchemeNamespace, scheme_id: SchemeId) -> RootScheme {
RootScheme {
scheme_ns: scheme_ns,
scheme_id: scheme_id,
next_id: AtomicUsize::new(0),
handles: RwLock::new(BTreeMap::new())
}
@ -39,12 +41,11 @@ impl Scheme for RootScheme {
let inner = {
let mut schemes = scheme::schemes_mut();
if schemes.get_name(path).is_some() {
return Err(Error::new(EEXIST));
}
let inner = Arc::new(UserInner::new(id, flags, context));
let scheme_id = schemes.insert(path.to_vec().into_boxed_slice(), Arc::new(Box::new(UserScheme::new(Arc::downgrade(&inner))))).expect("failed to insert user scheme");
inner.scheme_id.store(scheme_id, Ordering::SeqCst);
let inner = Arc::new(UserInner::new(self.scheme_id, id, flags, context));
schemes.insert(self.scheme_ns, path.to_vec().into_boxed_slice(), |scheme_id| {
inner.scheme_id.store(scheme_id, Ordering::SeqCst);
Arc::new(Box::new(UserScheme::new(Arc::downgrade(&inner))))
})?;
inner
};