Implement copy_file_range syscall in FUSE (#3475)

See the man page of copy_file_range:
https://man7.org/linux/man-pages/man2/copy_file_range.2.html

weed/mount/weedfs_file_read.go

@@ -1,9 +1,11 @@
 package mount
 
 import (
-	"github.com/hanwen/go-fuse/v2/fuse"
-	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"io"
+
+	"github.com/hanwen/go-fuse/v2/fuse"
+
+	"github.com/seaweedfs/seaweedfs/weed/glog"
 )
 
 /**
@@ -37,6 +39,9 @@ func (wfs *WFS) Read(cancel <-chan struct{}, in *fuse.ReadIn, buff []byte) (fuse
 		return nil, fuse.ENOENT
 	}
 
+	fh.entryLock.Lock()
+	defer fh.entryLock.Unlock()
+
 	offset := int64(in.Offset)
 	fh.lockForRead(offset, len(buff))
 	defer fh.unlockForRead(offset, len(buff))