From 9288ac511793de8edb9fcb12c758917a867af118 Mon Sep 17 00:00:00 2001
From: Diptanu Choudhury <diptanuc@gmail.com>
Date: Mon, 4 Apr 2016 13:05:02 -0700
Subject: [PATCH] Seeking to offset while doing readAt with non-zero offset

---
 client/allocdir/alloc_dir.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/client/allocdir/alloc_dir.go b/client/allocdir/alloc_dir.go
index 81528fcff..4ba84f112 100644
--- a/client/allocdir/alloc_dir.go
+++ b/client/allocdir/alloc_dir.go
@@ -331,6 +331,9 @@ func (d *AllocDir) ReadAt(path string, offset int64, limit int64) (io.ReadCloser
 	if err != nil {
 		return nil, err
 	}
+	if _, err := f.Seek(offset, 0); err != nil {
+		return nil, fmt.Errorf("can't seek to offset %q: %v", offset, err)
+	}
 	return &ReadCloserWrapper{Reader: io.LimitReader(f, limit), Closer: f}, nil
 }