41 	struct dentry *workdir;
51 	struct dentry *__upperdentry;
66 static struct dentry *__ovl_dentry_lower(struct ovl_entry *oe)  in __ovl_dentry_lower()
68 	return oe->numlower ? oe->lowerstack[0].dentry : NULL;  in __ovl_dentry_lower()
71 enum ovl_path_type ovl_path_type(struct dentry *dentry)  in ovl_path_type()  argument
73 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_type()
83 		if (oe->numlower && S_ISDIR(dentry->d_inode->i_mode))  in ovl_path_type()
94 static struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe)  in ovl_upperdentry_dereference()
99 void ovl_path_upper(struct dentry *dentry, struct path *path)  in ovl_path_upper()  argument
101 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_path_upper()
102 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_upper()
105 	path->dentry = ovl_upperdentry_dereference(oe);  in ovl_path_upper()
108 enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path)  in ovl_path_real()  argument
110 	enum ovl_path_type type = ovl_path_type(dentry);  in ovl_path_real()
113 		ovl_path_lower(dentry, path);  in ovl_path_real()
115 		ovl_path_upper(dentry, path);  in ovl_path_real()
120 struct dentry *ovl_dentry_upper(struct dentry *dentry)  in ovl_dentry_upper()  argument
122 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_upper()
127 struct dentry *ovl_dentry_lower(struct dentry *dentry)  in ovl_dentry_lower()  argument
129 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_lower()
134 struct dentry *ovl_dentry_real(struct dentry *dentry)  in ovl_dentry_real()  argument
136 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_real()
137 	struct dentry *realdentry;  in ovl_dentry_real()
146 struct dentry *ovl_entry_real(struct ovl_entry *oe, bool *is_upper)  in ovl_entry_real()
148 	struct dentry *realdentry;  in ovl_entry_real()
160 struct ovl_dir_cache *ovl_dir_cache(struct dentry *dentry)  in ovl_dir_cache()  argument
162 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dir_cache()
167 void ovl_set_dir_cache(struct dentry *dentry, struct ovl_dir_cache *cache)  in ovl_set_dir_cache()  argument
169 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_set_dir_cache()
174 void ovl_path_lower(struct dentry *dentry, struct path *path)  in ovl_path_lower()  argument
176 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_lower()
181 int ovl_want_write(struct dentry *dentry)  in ovl_want_write()  argument
183 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_want_write()
187 void ovl_drop_write(struct dentry *dentry)  in ovl_drop_write()  argument
189 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_drop_write()
193 struct dentry *ovl_workdir(struct dentry *dentry)  in ovl_workdir()  argument
195 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_workdir()
199 bool ovl_dentry_is_opaque(struct dentry *dentry)  in ovl_dentry_is_opaque()  argument
201 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_is_opaque()
205 void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque)  in ovl_dentry_set_opaque()  argument
207 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_set_opaque()
211 void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry)  in ovl_dentry_update()  argument
213 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_update()
226 void ovl_dentry_version_inc(struct dentry *dentry)  in ovl_dentry_version_inc()  argument
228 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_version_inc()
230 	WARN_ON(!mutex_is_locked(&dentry->d_inode->i_mutex));  in ovl_dentry_version_inc()
234 u64 ovl_dentry_version_get(struct dentry *dentry)  in ovl_dentry_version_get()  argument
236 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_version_get()
238 	WARN_ON(!mutex_is_locked(&dentry->d_inode->i_mutex));  in ovl_dentry_version_get()
242 bool ovl_is_whiteout(struct dentry *dentry)  in ovl_is_whiteout()  argument
244 	struct inode *inode = dentry->d_inode;  in ovl_is_whiteout()
249 static bool ovl_is_opaquedir(struct dentry *dentry)  in ovl_is_opaquedir()  argument
253 	struct inode *inode = dentry->d_inode;  in ovl_is_opaquedir()
258 	res = inode->i_op->getxattr(dentry, OVL_XATTR_OPAQUE, &val, 1);  in ovl_is_opaquedir()
265 static void ovl_dentry_release(struct dentry *dentry)  in ovl_dentry_release()  argument
267 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_dentry_release()
274 			dput(oe->lowerstack[i].dentry);  in ovl_dentry_release()
295 static inline struct dentry *ovl_lookup_real(struct dentry *dir,  in ovl_lookup_real()
298 	struct dentry *dentry;  in ovl_lookup_real()  local
301 	dentry = lookup_one_len(name->name, dir, name->len);  in ovl_lookup_real()
304 	if (IS_ERR(dentry)) {  in ovl_lookup_real()
305 		if (PTR_ERR(dentry) == -ENOENT)  in ovl_lookup_real()
306 			dentry = NULL;  in ovl_lookup_real()
307 	} else if (!dentry->d_inode) {  in ovl_lookup_real()
308 		dput(dentry);  in ovl_lookup_real()
309 		dentry = NULL;  in ovl_lookup_real()
311 	return dentry;  in ovl_lookup_real()
318 int ovl_path_next(int idx, struct dentry *dentry, struct path *path)  in ovl_path_next()  argument
320 	struct ovl_entry *oe = dentry->d_fsdata;  in ovl_path_next()
324 		ovl_path_upper(dentry, path);  in ovl_path_next()
325 		if (path->dentry)  in ovl_path_next()
335 struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,  in ovl_lookup()  argument
339 	struct ovl_entry *poe = dentry->d_parent->d_fsdata;  in ovl_lookup()
341 	struct dentry *upperdir, *upperdentry = NULL;  in ovl_lookup()
345 	struct dentry *this, *prev = NULL;  in ovl_lookup()
351 		this = ovl_lookup_real(upperdir, &dentry->d_name);  in ovl_lookup()
379 		this = ovl_lookup_real(lowerpath.dentry, &dentry->d_name);  in ovl_lookup()
419 		stack[ctr].dentry = this;  in ovl_lookup()
433 		struct dentry *realdentry;  in ovl_lookup()
435 		realdentry = upperdentry ? upperdentry : stack[0].dentry;  in ovl_lookup()
438 		inode = ovl_new_inode(dentry->d_sb, realdentry->d_inode->i_mode,  in ovl_lookup()
449 	dentry->d_fsdata = oe;  in ovl_lookup()
450 	d_add(dentry, inode);  in ovl_lookup()
458 		dput(stack[i].dentry);  in ovl_lookup()
496 static int ovl_statfs(struct dentry *dentry, struct kstatfs *buf)  in ovl_statfs()  argument
498 	struct ovl_fs *ofs = dentry->d_sb->s_fs_info;  in ovl_statfs()
499 	struct dentry *root_dentry = dentry->d_sb->s_root;  in ovl_statfs()
520 static int ovl_show_options(struct seq_file *m, struct dentry *dentry)  in ovl_show_options()  argument
522 	struct super_block *sb = dentry->d_sb;  in ovl_show_options()
640 static struct dentry *ovl_workdir_create(struct vfsmount *mnt,  in ovl_workdir_create()
641 					 struct dentry *dentry)  in ovl_workdir_create()  argument
643 	struct inode *dir = dentry->d_inode;  in ovl_workdir_create()
644 	struct dentry *work;  in ovl_workdir_create()
654 	work = lookup_one_len(OVL_WORKDIR_NAME, dentry,  in ovl_workdir_create()
702 static bool ovl_is_allowed_fs_type(struct dentry *root)  in ovl_is_allowed_fs_type()
735 	if (!ovl_is_allowed_fs_type(path->dentry)) {  in ovl_mount_dir_noesc()
739 	if (!S_ISDIR(path->dentry->d_inode->i_mode)) {  in ovl_mount_dir_noesc()
791 static bool ovl_workdir_ok(struct dentry *workdir, struct dentry *upperdir)  in ovl_workdir_ok()
826 	struct dentry *root_dentry;  in ovl_fill_super()
880 		if (!ovl_workdir_ok(workpath.dentry, upperpath.dentry)) {  in ovl_fill_super()
931 		ufs->workdir = ovl_workdir_create(ufs->upper_mnt, workpath.dentry);  in ovl_fill_super()
984 	oe->__upperdentry = upperpath.dentry;  in ovl_fill_super()
986 		oe->lowerstack[i].dentry = stack[i].dentry;  in ovl_fill_super()
1031 static struct dentry *ovl_mount(struct file_system_type *fs_type, int flags,  in ovl_mount()