1 files changed, 21 insertions, 0 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index cfdea47..b5a0dc3 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -303,3 +303,24 @@ void ovl_copy_up_end(struct dentry *dentry)
 	wake_up_locked(&ofs->copyup_wq);
 	spin_unlock(&ofs->copyup_wq.lock);
 }
+
+int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
+		       const char *name, const void *value, size_t size,
+		       int xerr)
+{
+	int err;
+	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+
+	if (ofs->noxattr)
+		return xerr;
+
+	err = ovl_do_setxattr(upperdentry, name, value, size, 0);
+
+	if (err == -EOPNOTSUPP) {
+		pr_warn("overlayfs: cannot set %s xattr on upper\n", name);
+		ofs->noxattr = true;
+		return xerr;
+	}
+
+	return err;
+}