fix: root directory lookup path

crates/axfs_vfs/src/path.rs

@@ -75,7 +75,7 @@ impl<'a> AbsPath<'a> {
     }
 
     /// Simply wrap a string into a `AbsPath`.
-    pub fn new_owned(path: String) -> Self {
+    pub const fn new_owned(path: String) -> Self {
         Self(Cow::Owned(path))
     }
 
@@ -128,14 +128,19 @@ impl core::fmt::Display for AbsPath<'_> {
 pub struct RelPath<'a>(Cow<'a, str>);
 
 impl<'a> RelPath<'a> {
-    /// Wrap a string into a `RelPath`.
-    pub fn new(path: &'a str) -> Self {
+    /// Simply wrap a string into a `RelPath`.
+    pub const fn new(path: &'a str) -> Self {
         Self(Cow::Borrowed(path))
     }
 
+    /// Wrap a string into a `RelPath` with possibly leading '/' trimmed.
+    pub fn new_trimmed(path: &'a str) -> Self {
+        Self(Cow::Borrowed(path.trim_start_matches('/')))
+    }
+
     /// Parse and canonicalize a relative path from a string.
     pub fn new_canonicalized(path: &str) -> Self {
-        Self(Cow::Owned(canonicalize(path.trim_start_matches("/"))))
+        Self(Cow::Owned(canonicalize(path.trim_start_matches('/'))))
     }
 }
 

modules/ruxfs/src/fops.rs

@@ -11,7 +11,7 @@
 
 use axerrno::{ax_err, ax_err_type, AxResult};
 use axfs_vfs::path::{AbsPath, RelPath};
-use axfs_vfs::{VfsNodeRef, VfsNodeType, VfsNodeOps};
+use axfs_vfs::{VfsError, VfsNodeOps, VfsNodeRef, VfsNodeType};
 use axio::SeekFrom;
 use capability::{Cap, WithCap};
 
@@ -212,7 +212,7 @@ impl File {
 impl Directory {
     /// Access the underlying `VfsNode`
     fn access_node(&self) -> AxResult<&VfsNodeRef> {
-        self.node.access(Cap::EXECUTE).or(ax_err!(PermissionDenied))
+        self.node.access(Cap::EXECUTE).map_err(|_| VfsError::PermissionDenied)
     }
 
     /// Creates an opened directory.

modules/ruxfs/src/root.rs

@@ -115,7 +115,7 @@ impl RootDirectory {
         if max_len == 0 {
             f(self.main_fs.clone(), path) // not matched any mount point
         } else {
-            f(self.mounts[idx].fs.clone(), &RelPath::new(&path[max_len..])) // matched at `idx`
+            f(self.mounts[idx].fs.clone(), &RelPath::new_trimmed(&path[max_len..])) // matched at `idx`
         }
     }
 }