From e3a74331549a3857c2cbfe092064218509b4945a Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Sun, 3 Apr 2016 16:37:50 +1000
Subject: [PATCH] piece file storage: Don't write to completed pieces

---
 storage/piece_file.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/storage/piece_file.go b/storage/piece_file.go
index 95b2af0b..5656eedd 100644
--- a/storage/piece_file.go
+++ b/storage/piece_file.go
@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"errors"
 	"io"
 	"os"
 	"path"
@@ -96,6 +97,10 @@ func (me pieceFileTorrentStoragePiece) ReadAt(b []byte, off int64) (n int, err e
 }
 
 func (me pieceFileTorrentStoragePiece) WriteAt(b []byte, off int64) (n int, err error) {
+	if me.GetIsComplete() {
+		err = errors.New("piece completed")
+		return
+	}
 	f, err := me.fs.OpenFile(me.incompletePath(), os.O_WRONLY|os.O_CREATE)
 	if err != nil {
 		return
-- 
2.48.1