Calling fsync for parent directory in copy-up to
ensure the change get synced.
Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
---
fs/overlayfs/copy_up.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index e040970408d4..52ca915f04a3 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -944,6 +944,7 @@ static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
{
int err;
DEFINE_DELAYED_CALL(done);
+ struct file *parent_file = NULL;
struct path parentpath;
struct ovl_copy_up_ctx ctx = {
.parent = parent,
@@ -972,6 +973,12 @@ static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
AT_STATX_SYNC_AS_STAT);
if (err)
return err;
+
+ parent_file = ovl_path_open(&parentpath, O_WRONLY);
+ if (IS_ERR(parent_file)) {
+ err = PTR_ERR(parent_file);
+ return err;
+ }
}
/* maybe truncate regular file. this has no effect on dirs */
@@ -998,6 +1005,14 @@ static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
err = ovl_copy_up_meta_inode_data(&ctx);
ovl_copy_up_end(dentry);
}
+
+ if (!err) {
+ if (parent_file) {
+ vfs_fsync(parent_file, 0);
+ fput(parent_file);
+ }
+ }
+
do_delayed_call(&done);
return err;
--
2.27.0
