vfs: rename FsNode::close() to FsNode::release()

FsNode::close() will instead become a method that takes a closes a file descriptor, while release() will close the whole VFS node.

ableos/src/filesystem/ext2.rs

@@ -45,7 +45,7 @@ where
         Ok(FileDescriptor::new(node.flags, inode.size(), node.inode))
     }
 
-    fn close(&self, node: &super::FsNode) -> Result<()> {
+    fn release(&self, node: &super::FsNode) -> Result<()> {
         todo!()
     }
 

ableos/src/filesystem/mod.rs

@@ -22,7 +22,7 @@ where
     Self: Send,
 {
     fn open(&self, node: &FsNode /* TODO: flags */) -> Result<FileDescriptor>;
-    fn close(&self, node: &FsNode) -> Result<()>;
+    fn release(&self, node: &FsNode) -> Result<()>;
     fn read(&self, node: &FsNode, offset: usize, size: usize) -> Result<Box<[u8]>>;
     fn write(&self, node: &FsNode, offset: usize, buffer: Box<[u8]>) -> Result<()>;
     fn read_dir(&self, node: &FsNode, index: usize) -> Result<DirectoryEntry>;
@@ -79,13 +79,13 @@ impl FsNode {
 
     /// This method is for closing the VFS node, which is done when no open file
     /// descriptors for this file are left.
-    pub fn close(&self) -> Result<()> {
+    pub fn release(&self) -> Result<()> {
         let state = KERNEL_STATE.lock();
         let device = state
             .get_storage_device(self.device_handle)
             .ok_or_else(|| FsError::InvalidDevice)?;
 
-        device.close(self)
+        device.release(self)
     }
 
     /// This method reads from the VFS node without opening a new file