/* SPDX-License-Identifier: GPL-2.0 *//* *  internal.h - declarations internal to debugfs * *  Copyright (C) 2016 Nicolai Stange <nicstange@gmail.com> */ #ifndef _DEBUGFS_INTERNAL_H_#define _DEBUGFS_INTERNAL_H_#include <linux/list.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;extern const struct file_operations debugfs_full_short_proxy_file_operations; struct debugfs_fsdata {	const struct file_operations *real_fops;	const struct debugfs_short_fops *short_fops;	union {		/* automount_fn is used when real_fops is NULL */		debugfs_automount_t automount;		struct {			refcount_t active_users;			struct completion active_users_drained; 			/* protect cancellations */			struct mutex cancellations_mtx;			struct list_head cancellations;		};	};}; /* * 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) /* Access BITS */#define DEBUGFS_ALLOW_API	BIT(0)#define DEBUGFS_ALLOW_MOUNT	BIT(1) #ifdef CONFIG_DEBUG_FS_ALLOW_ALL#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_MOUNT | DEBUGFS_ALLOW_API)#endif#ifdef CONFIG_DEBUG_FS_DISALLOW_MOUNT#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_API)#endif#ifdef CONFIG_DEBUG_FS_ALLOW_NONE#define DEFAULT_DEBUGFS_ALLOW_BITS (0)#endif #endif /* _DEBUGFS_INTERNAL_H_ */