1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  internal.h - declarations internal to debugfs
 4 *
 5 *  Copyright (C) 2016 Nicolai Stange <nicstange@gmail.com>
 6 */
 7
 8#ifndef _DEBUGFS_INTERNAL_H_
 9#define _DEBUGFS_INTERNAL_H_
10
11struct file_operations;
12
13/* declared over in file.c */
14extern const struct file_operations debugfs_noop_file_operations;
15extern const struct file_operations debugfs_open_proxy_file_operations;
16extern const struct file_operations debugfs_full_proxy_file_operations;
17
18struct debugfs_fsdata {
19	const struct file_operations *real_fops;
20	refcount_t active_users;
21	struct completion active_users_drained;
22};
23
24/*
25 * A dentry's ->d_fsdata either points to the real fops or to a
26 * dynamically allocated debugfs_fsdata instance.
27 * In order to distinguish between these two cases, a real fops
28 * pointer gets its lowest bit set.
29 */
30#define DEBUGFS_FSDATA_IS_REAL_FOPS_BIT BIT(0)
31
32#endif /* _DEBUGFS_INTERNAL_H_ */