From 51f5edd7498333f1f6356fbfd90578db4875cf83 Mon Sep 17 00:00:00 2001
From: Robin Appelman <icewind@owncloud.com>
Date: Fri, 22 Apr 2016 16:07:08 +0200
Subject: [PATCH] add locks in the scanner to prevent multiple scanners running
 on the same files

---
 lib/private/files/cache/scanner.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/private/files/cache/scanner.php b/lib/private/files/cache/scanner.php
index 8730707f1c..feefe29d27 100644
--- a/lib/private/files/cache/scanner.php
+++ b/lib/private/files/cache/scanner.php
@@ -296,6 +296,7 @@ class Scanner extends BasicEmitter implements IScanner {
 		}
 		if ($lock) {
 			if ($this->storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
+				$this->storage->acquireLock('scanner::' . $path, ILockingProvider::LOCK_EXCLUSIVE, $this->lockingProvider);
 				$this->storage->acquireLock($path, ILockingProvider::LOCK_SHARED, $this->lockingProvider);
 			}
 		}
@@ -307,6 +308,7 @@ class Scanner extends BasicEmitter implements IScanner {
 		if ($lock) {
 			if ($this->storage->instanceOfStorage('\OCP\Files\Storage\ILockingStorage')) {
 				$this->storage->releaseLock($path, ILockingProvider::LOCK_SHARED, $this->lockingProvider);
+				$this->storage->releaseLock('scanner::' . $path, ILockingProvider::LOCK_EXCLUSIVE, $this->lockingProvider);
 			}
 		}
 		return $data;