From b79c69cbfca48d4d1e6c3306ddcccc2122131f4d Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jackpot51@gmail.com>
Date: Thu, 29 Sep 2016 17:45:01 -0600
Subject: [PATCH] Add dup to ahci disk scheme

---
 drivers/ahcid/src/scheme.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/ahcid/src/scheme.rs b/drivers/ahcid/src/scheme.rs
index 76b8b8a..4b39ae3 100644
--- a/drivers/ahcid/src/scheme.rs
+++ b/drivers/ahcid/src/scheme.rs
@@ -43,6 +43,15 @@ impl Scheme for DiskScheme {
         }
     }
 
+    fn dup(&self, id: usize) -> Result<usize> {
+        let mut handles = self.handles.lock();
+        let mut handle = handles.get_mut(&id).ok_or(Error::new(EBADF))?;
+
+        let new_id = self.next_id.fetch_add(1, Ordering::SeqCst);
+        self.handles.lock().insert(new_id, handle.clone());
+        Ok(new_id)
+    }
+
     fn read(&self, id: usize, buf: &mut [u8]) -> Result<usize> {
         let mut handles = self.handles.lock();
         let mut handle = handles.get_mut(&id).ok_or(Error::new(EBADF))?;