internal.h (1310B)
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/* Access BITS */ 33#define DEBUGFS_ALLOW_API BIT(0) 34#define DEBUGFS_ALLOW_MOUNT BIT(1) 35 36#ifdef CONFIG_DEBUG_FS_ALLOW_ALL 37#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_MOUNT | DEBUGFS_ALLOW_API) 38#endif 39#ifdef CONFIG_DEBUG_FS_DISALLOW_MOUNT 40#define DEFAULT_DEBUGFS_ALLOW_BITS (DEBUGFS_ALLOW_API) 41#endif 42#ifdef CONFIG_DEBUG_FS_ALLOW_NONE 43#define DEFAULT_DEBUGFS_ALLOW_BITS (0) 44#endif 45 46#endif /* _DEBUGFS_INTERNAL_H_ */