1 files changed, 53 insertions, 0 deletions
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
new file mode 100644
index 000000000000..d14bca1850d9
--- /dev/null
+++ b/fs/overlayfs/ovl_entry.h
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright (C) 2011 Novell Inc.
+ * Copyright (C) 2016 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+struct ovl_config {
+	char *lowerdir;
+	char *upperdir;
+	char *workdir;
+	bool default_permissions;
+	bool redirect_dir;
+};
+
+/* private information held for overlayfs's superblock */
+struct ovl_fs {
+	struct vfsmount *upper_mnt;
+	unsigned numlower;
+	struct vfsmount **lower_mnt;
+	struct dentry *workdir;
+	long namelen;
+	/* pathnames of lower and upper dirs, for show_options */
+	struct ovl_config config;
+	/* creds of process who forced instantiation of super block */
+	const struct cred *creator_cred;
+};
+
+/* private information held for every overlayfs dentry */
+struct ovl_entry {
+	struct dentry *__upperdentry;
+	struct ovl_dir_cache *cache;
+	union {
+		struct {
+			u64 version;
+			const char *redirect;
+			bool opaque;
+		};
+		struct rcu_head rcu;
+	};
+	unsigned numlower;
+	struct path lowerstack[];
+};
+
+struct ovl_entry *ovl_alloc_entry(unsigned int numlower);
+
+static inline struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe)
+{
+	return lockless_dereference(oe->__upperdentry);
+}