| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| 11 | struct file_operations; |
| 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; |
| 16 | extern const struct file_operations debugfs_full_proxy_file_operations; |
| 17 | |
| 18 | struct 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_ */ |