From e640f7813468211a0e84416683bbf2f171936a6c Mon Sep 17 00:00:00 2001
From: Ben Pig Chu <benpichu@gmail.com>
Date: Sat, 27 Oct 2018 01:53:15 +0800
Subject: [PATCH] untested single layer lookup named find

---
 src/sfs.rs | 11 +++++++++++
 src/vfs.rs |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/src/sfs.rs b/src/sfs.rs
index abb201e..e505f28 100644
--- a/src/sfs.rs
+++ b/src/sfs.rs
@@ -396,6 +396,17 @@ impl vfs::INode for INode {
             _ => unimplemented!(),
         }
     }
+    fn find(&self, name: &str) -> vfs::Result<Ptr<vfs::INode>> {
+        let fs = self.fs.upgrade().unwrap();
+        let info = self.info().unwrap();
+        assert_eq!(info.type_, vfs::FileType::Dir);
+        let inode_id = self.get_file_inode_id(name);
+        if inode_id.is_none() {
+            return Err(());
+        }
+        let inode = fs.get_inode(inode_id.unwrap());
+        Ok(inode)
+    }
     fn get_entry(&self,id: usize) -> vfs::Result<String> {
         assert_eq!(self.disk_inode.type_, FileType::Dir);
         assert!(id<self.disk_inode.blocks as usize);
diff --git a/src/vfs.rs b/src/vfs.rs
index eadd870..f152941 100644
--- a/src/vfs.rs
+++ b/src/vfs.rs
@@ -28,6 +28,8 @@ pub trait INode: Debug + Any {
     /// user of the vfs api should call borrow_mut by itself
     fn link(&mut self, name: &str, other:&mut INode) -> Result<()>;
     fn lookup(&self, path: &str) -> Result<INodePtr>;
+    /// lookup with only one layer
+    fn find(&self, name: &str) -> Result<INodePtr>;
     fn list(&self) -> Result<Vec<String>>;
     /// like list()[id]
     /// only get one item in list, often faster than list