From 77e3d54bae3197856535ea71ae4841e3360a1a28 Mon Sep 17 00:00:00 2001
From: Jinmou Li <jinmli@google.com>
Date: Tue, 1 Sep 2020 01:49:57 +0000
Subject: Implement FUSE_WRITE

This commit adds basic write(2) support for FUSE.
---
 pkg/sentry/fsimpl/fuse/fusefs.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'pkg/sentry/fsimpl/fuse/fusefs.go')

diff --git a/pkg/sentry/fsimpl/fuse/fusefs.go b/pkg/sentry/fsimpl/fuse/fusefs.go
index cfae9ed0d..8cf13dcb6 100644
--- a/pkg/sentry/fsimpl/fuse/fusefs.go
+++ b/pkg/sentry/fsimpl/fuse/fusefs.go
@@ -18,6 +18,7 @@ package fuse
 import (
 	"math"
 	"strconv"
+	"sync"
 	"sync/atomic"
 
 	"gvisor.dev/gvisor/pkg/abi/linux"
@@ -228,13 +229,18 @@ type inode struct {
 	kernfs.InodeNotSymlink
 	kernfs.OrderedChildren
 
-	NodeID uint64
 	dentry kernfs.Dentry
-	locks  vfs.FileLocks
 
 	// the owning filesystem. fs is immutable.
 	fs *filesystem
 
+	// metaDataMu protects the metadata of this inode.
+	metadataMu sync.Mutex
+
+	NodeID uint64
+
+	locks vfs.FileLocks
+
 	// size of the file.
 	size uint64
 
-- 
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