[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/fs/overlayfs/ovl_entry.h b/src/kernel/linux/v4.19/fs/overlayfs/ovl_entry.h
new file mode 100644
index 0000000..dc06228
--- /dev/null
+++ b/src/kernel/linux/v4.19/fs/overlayfs/ovl_entry.h
@@ -0,0 +1,123 @@
+/*
+ *
+ * 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;
+ bool redirect_follow;
+ const char *redirect_mode;
+ bool index;
+ bool nfs_export;
+ int xino;
+ bool metacopy;
+ bool override_creds;
+};
+
+struct ovl_sb {
+ struct super_block *sb;
+ dev_t pseudo_dev;
+};
+
+struct ovl_layer {
+ struct vfsmount *mnt;
+ /* Trap in ovl inode cache */
+ struct inode *trap;
+ struct ovl_sb *fs;
+ /* Index of this layer in fs root (upper idx == 0) */
+ int idx;
+ /* One fsid per unique underlying sb (upper fsid == 0) */
+ int fsid;
+};
+
+struct ovl_path {
+ struct ovl_layer *layer;
+ struct dentry *dentry;
+};
+
+/* private information held for overlayfs's superblock */
+struct ovl_fs {
+ struct vfsmount *upper_mnt;
+ unsigned int numlower;
+ /* Number of unique lower sb that differ from upper sb */
+ unsigned int numlowerfs;
+ struct ovl_layer *lower_layers;
+ struct ovl_sb *lower_fs;
+ /* workbasedir is the path at workdir= mount option */
+ struct dentry *workbasedir;
+ /* workdir is the 'work' directory under workbasedir */
+ struct dentry *workdir;
+ /* index directory listing overlay inodes by origin file handle */
+ struct dentry *indexdir;
+ 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;
+ bool tmpfile;
+ bool noxattr;
+ /* Did we take the inuse lock? */
+ bool upperdir_locked;
+ bool workdir_locked;
+ /* Traps in ovl inode cache */
+ struct inode *upperdir_trap;
+ struct inode *workbasedir_trap;
+ struct inode *workdir_trap;
+ struct inode *indexdir_trap;
+ /* Inode numbers in all layers do not use the high xino_bits */
+ unsigned int xino_bits;
+};
+
+/* private information held for every overlayfs dentry */
+struct ovl_entry {
+ union {
+ struct {
+ unsigned long flags;
+ };
+ struct rcu_head rcu;
+ };
+ unsigned numlower;
+ struct ovl_path lowerstack[];
+};
+
+struct ovl_entry *ovl_alloc_entry(unsigned int numlower);
+
+static inline struct ovl_entry *OVL_E(struct dentry *dentry)
+{
+ return (struct ovl_entry *) dentry->d_fsdata;
+}
+
+struct ovl_inode {
+ union {
+ struct ovl_dir_cache *cache; /* directory */
+ struct inode *lowerdata; /* regular file */
+ };
+ const char *redirect;
+ u64 version;
+ unsigned long flags;
+ struct inode vfs_inode;
+ struct dentry *__upperdentry;
+ struct inode *lower;
+
+ /* synchronize copy up and more */
+ struct mutex lock;
+};
+
+static inline struct ovl_inode *OVL_I(struct inode *inode)
+{
+ return container_of(inode, struct ovl_inode, vfs_inode);
+}
+
+static inline struct dentry *ovl_upperdentry_dereference(struct ovl_inode *oi)
+{
+ return READ_ONCE(oi->__upperdentry);
+}