Add a Scheme supertrait for kernel-only methods.

src/scheme/acpi.rs

@@ -288,3 +288,4 @@ impl Scheme for AcpiScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for AcpiScheme {}

src/scheme/debug.rs

@@ -165,3 +165,4 @@ impl Scheme for DebugScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for DebugScheme {}

src/scheme/event.rs

@@ -71,3 +71,4 @@ impl Scheme for EventScheme {
         queues_mut().remove(&id).ok_or(Error::new(EBADF)).and(Ok(0))
     }
 }
+impl crate::scheme::KernelScheme for EventScheme {}

src/scheme/initfs.rs

@@ -273,3 +273,4 @@ impl Scheme for InitFsScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for InitFsScheme {}

src/scheme/irq.rs

@@ -371,3 +371,4 @@ impl Scheme for IrqScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for IrqScheme {}

src/scheme/itimer.rs

@@ -106,3 +106,4 @@ impl Scheme for ITimerScheme {
         self.handles.write().remove(&id).ok_or(Error::new(EBADF)).and(Ok(0))
     }
 }
+impl crate::scheme::KernelScheme for ITimerScheme {}

src/scheme/live.rs

@@ -202,3 +202,4 @@ impl Scheme for DiskScheme {
         self.handles.write().remove(&id).ok_or(Error::new(EBADF)).and(Ok(0))
     }
 }
+impl crate::scheme::KernelScheme for DiskScheme {}

src/scheme/memory.rs

@@ -85,3 +85,4 @@ impl Scheme for MemoryScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for MemoryScheme {}

src/scheme/mod.rs

@@ -107,7 +107,7 @@ impl<'a> Iterator for SchemeIter<'a> {
 
 /// Scheme list type
 pub struct SchemeList {
-    map: BTreeMap<SchemeId, Arc<dyn Scheme + Send + Sync>>,
+    map: BTreeMap<SchemeId, Arc<dyn KernelScheme + Send + Sync>>,
     names: BTreeMap<SchemeNamespace, BTreeMap<Box<str>, SchemeId>>,
     next_ns: usize,
     next_id: usize
@@ -201,7 +201,7 @@ impl SchemeList {
         Ok(to)
     }
 
-    pub fn iter(&self) -> ::alloc::collections::btree_map::Iter<SchemeId, Arc<dyn Scheme + Send + Sync>> {
+    pub fn iter(&self) -> ::alloc::collections::btree_map::Iter<SchemeId, Arc<dyn KernelScheme + Send + Sync>> {
         self.map.iter()
     }
 
@@ -212,11 +212,11 @@ impl SchemeList {
     }
 
     /// Get the nth scheme.
-    pub fn get(&self, id: SchemeId) -> Option<&Arc<dyn Scheme + Send + Sync>> {
+    pub fn get(&self, id: SchemeId) -> Option<&Arc<dyn KernelScheme + Send + Sync>> {
         self.map.get(&id)
     }
 
-    pub fn get_name(&self, ns: SchemeNamespace, name: &str) -> Option<(SchemeId, &Arc<dyn Scheme + Send + Sync>)> {
+    pub fn get_name(&self, ns: SchemeNamespace, name: &str) -> Option<(SchemeId, &Arc<dyn KernelScheme + Send + Sync>)> {
         if let Some(names) = self.names.get(&ns) {
             if let Some(&id) = names.get(name) {
                 return self.get(id).map(|scheme| (id, scheme));
@@ -227,7 +227,7 @@ impl SchemeList {
 
     /// Create a new scheme.
     pub fn insert<F>(&mut self, ns: SchemeNamespace, name: &str, scheme_fn: F) -> Result<SchemeId>
-        where F: Fn(SchemeId) -> Arc<dyn Scheme + Send + Sync>
+        where F: Fn(SchemeId) -> Arc<dyn KernelScheme + Send + Sync>
     {
         if let Some(names) = self.names.get(&ns) {
             if names.contains_key(name) {
@@ -298,3 +298,5 @@ pub fn schemes() -> RwLockReadGuard<'static, SchemeList> {
 pub fn schemes_mut() -> RwLockWriteGuard<'static, SchemeList> {
     SCHEMES.call_once(init_schemes).write()
 }
+
+pub trait KernelScheme: Scheme + Send + Sync + 'static {}

src/scheme/pipe.rs

@@ -264,3 +264,4 @@ impl Drop for PipeWrite {
         self.condition.notify();
     }
 }
+impl crate::scheme::KernelScheme for PipeScheme {}

src/scheme/proc.rs

@@ -824,3 +824,4 @@ impl Scheme for ProcScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for ProcScheme {}

src/scheme/root.rs

@@ -344,3 +344,4 @@ impl Scheme for RootScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for RootScheme {}

src/scheme/serio.rs

@@ -162,3 +162,4 @@ impl Scheme for SerioScheme {
         Ok(0)
     }
 }
+impl crate::scheme::KernelScheme for SerioScheme {}

src/scheme/sys/mod.rs

@@ -170,3 +170,4 @@ impl Scheme for SysScheme {
         self.handles.write().remove(&id).ok_or(Error::new(EBADF)).and(Ok(0))
     }
 }
+impl crate::scheme::KernelScheme for SysScheme {}

src/scheme/time.rs

@@ -117,3 +117,4 @@ impl Scheme for TimeScheme {
         self.handles.write().remove(&id).ok_or(Error::new(EBADF)).and(Ok(0))
     }
 }
+impl crate::scheme::KernelScheme for TimeScheme {}

src/scheme/user.rs

@@ -528,3 +528,4 @@ impl Scheme for UserScheme {
         inner.call(SYS_CLOSE, file, 0, 0)
     }
 }
+impl crate::scheme::KernelScheme for UserScheme {}