162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * internal.h - declarations internal to debugfs 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 2016 Nicolai Stange <nicstange@gmail.com> 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#ifndef _DEBUGFS_INTERNAL_H_ 962306a36Sopenharmony_ci#define _DEBUGFS_INTERNAL_H_ 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_cistruct file_operations; 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci/* declared over in file.c */ 1462306a36Sopenharmony_ciextern const struct file_operations debugfs_noop_file_operations; 1562306a36Sopenharmony_ciextern const struct file_operations debugfs_open_proxy_file_operations; 1662306a36Sopenharmony_ciextern const struct file_operations debugfs_full_proxy_file_operations; 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_cistruct debugfs_fsdata { 1962306a36Sopenharmony_ci const struct file_operations *real_fops; 2062306a36Sopenharmony_ci union { 2162306a36Sopenharmony_ci /* automount_fn is used when real_fops is NULL */ 2262306a36Sopenharmony_ci debugfs_automount_t automount; 2362306a36Sopenharmony_ci struct { 2462306a36Sopenharmony_ci refcount_t active_users; 2562306a36Sopenharmony_ci struct completion active_users_drained; 2662306a36Sopenharmony_ci }; 2762306a36Sopenharmony_ci }; 2862306a36Sopenharmony_ci}; 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci/* 3162306a36Sopenharmony_ci * A dentry's ->d_fsdata either points to the real fops or to a 3262306a36Sopenharmony_ci * dynamically allocated debugfs_fsdata instance. 3362306a36Sopenharmony_ci * In order to distinguish between these two cases, a real fops 3462306a36Sopenharmony_ci * pointer gets its lowest bit set. 3562306a36Sopenharmony_ci */ 3662306a36Sopenharmony_ci#define DEBUGFS_FSDATA_IS_REAL_FOPS_BIT BIT(0) 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ci/* Access BITS */ 3962306a36Sopenharmony_ci#define DEBUGFS_ALLOW_API BIT(0) 4062306a36Sopenharmony_ci#define DEBUGFS_ALLOW_MOUNT BIT(1) 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci#ifdef CONFIG_DEBUG_FS_ALLOW_ALL 4362306a36Sopenharmony_ci#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_MOUNT | DEBUGFS_ALLOW_API) 4462306a36Sopenharmony_ci#endif 4562306a36Sopenharmony_ci#ifdef CONFIG_DEBUG_FS_DISALLOW_MOUNT 4662306a36Sopenharmony_ci#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_API) 4762306a36Sopenharmony_ci#endif 4862306a36Sopenharmony_ci#ifdef CONFIG_DEBUG_FS_ALLOW_NONE 4962306a36Sopenharmony_ci#define DEFAULT_DEBUGFS_ALLOW_BITS (0) 5062306a36Sopenharmony_ci#endif 5162306a36Sopenharmony_ci 5262306a36Sopenharmony_ci#endif /* _DEBUGFS_INTERNAL_H_ */ 53