rust: file: Add flags() method to File

It's useful to know the flags associated with a file. Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
danobi · Jan 2, 2022 · 53df040 · 53df040
1 parent 8ca7a7f
commit 53df040
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/rust/kernel/file.rs b/rust/kernel/file.rs
@@ -54,6 +54,12 @@ impl File {
         // change over the lifetime of a file).
         unsafe { CredentialRef::from_ptr(ptr) }
     }
+
+    /// Returns the flags associated with the file.
+    pub fn flags(&self) -> u32 {
+        // SAFETY: `File::ptr` is guaranteed to be valid by the type invariants.
+        unsafe { (*self.ptr).f_flags }
+    }
 }
 
 impl Drop for File {