[linux.git] / fs / debugfs / internal.h

// SPDX-License-Identifier: GPL-2.0
/*
 *  internal.h - declarations internal to debugfs
 *
 *  Copyright (C) 2016 Nicolai Stange <[email protected]>
 */

#ifndef _DEBUGFS_INTERNAL_H_
#define _DEBUGFS_INTERNAL_H_

struct file_operations;

/* declared over in file.c */
extern const struct file_operations debugfs_noop_file_operations;
extern const struct file_operations debugfs_open_proxy_file_operations;
extern const struct file_operations debugfs_full_proxy_file_operations;

struct debugfs_fsdata {
	const struct file_operations *real_fops;
	refcount_t active_users;
	struct completion active_users_drained;
};

/*
 * A dentry's ->d_fsdata either points to the real fops or to a
 * dynamically allocated debugfs_fsdata instance.
 * In order to distinguish between these two cases, a real fops
 * pointer gets its lowest bit set.
 */
#define DEBUGFS_FSDATA_IS_REAL_FOPS_BIT BIT(0)

#endif /* _DEBUGFS_INTERNAL_H_ */
Commit	Line	Data
3bce94fd	1	// SPDX-License-Identifier: GPL-2.0
9fd4dcec NS	2	/*
	3	* internal.h - declarations internal to debugfs
	4	*
	5	* Copyright (C) 2016 Nicolai Stange <[email protected]>
9fd4dcec NS	6	*/
	7
	8	#ifndef _DEBUGFS_INTERNAL_H_
	9	#define _DEBUGFS_INTERNAL_H_
	10
	11	struct file_operations;
9fd4dcec NS	12
	13	/* declared over in file.c */
	14	extern const struct file_operations debugfs_noop_file_operations;
	15	extern const struct file_operations debugfs_open_proxy_file_operations;
49d200de	16	extern const struct file_operations debugfs_full_proxy_file_operations;
9fd4dcec	17
7c8d4698 NS	18	struct debugfs_fsdata {
7c8d4698 NS	19	const struct file_operations *real_fops;
e9117a5a NS	20	refcount_t active_users;
e9117a5a NS	21	struct completion active_users_drained;
7c8d4698 NS	22	};
7c8d4698 NS	23
7d39bc50 NS	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
9fd4dcec	32	#endif /* _DEBUGFS_INTERNAL_H_ */