From ade94b0d0a71db7db117454c075dc93f839e1c9c Mon Sep 17 00:00:00 2001
From: Konstantin Lebedev <9497591+kmlebedev@users.noreply.github.com>
Date: Tue, 30 Aug 2022 12:08:00 +0500
Subject: [PATCH] avoid race conditions access to  SuperBlock.Version (#3539)

* avoid race conditions access to  SuperBlock.Version
https://github.com/seaweedfs/seaweedfs/issues/3515

* superBlockAccessLock replace to sync.Mutex
---
 weed/storage/volume.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/weed/storage/volume.go b/weed/storage/volume.go
index 91d2d0d1f..e48a2f49a 100644
--- a/weed/storage/volume.go
+++ b/weed/storage/volume.go
@@ -36,6 +36,7 @@ type Volume struct {
 	super_block.SuperBlock
 
 	dataFileAccessLock    sync.RWMutex
+	superBlockAccessLock  sync.Mutex
 	asyncRequestsChan     chan *needle.AsyncRequest
 	lastModifiedTsSeconds uint64 // unix time in seconds
 	lastAppendAtNs        uint64 // unix time in nanoseconds
@@ -97,6 +98,8 @@ func (v *Volume) FileName(ext string) (fileName string) {
 }
 
 func (v *Volume) Version() needle.Version {
+	v.superBlockAccessLock.Lock()
+	defer v.superBlockAccessLock.Unlock()
 	if v.volumeInfo.Version != 0 {
 		v.SuperBlock.Version = needle.Version(v.volumeInfo.Version)
 	}