internal.h

 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#include <linux/list.h>
11
12struct file_operations;
13
14struct debugfs_inode_info {
15	struct inode vfs_inode;
16	union {
17		const void *raw;
18		const struct file_operations *real_fops;
19		const struct debugfs_short_fops *short_fops;
20		debugfs_automount_t automount;
21	};
22	void *aux;
23};
24
25static inline struct debugfs_inode_info *DEBUGFS_I(struct inode *inode)
26{
27	return container_of(inode, struct debugfs_inode_info, vfs_inode);
28}
29
30/* declared over in file.c */
31extern const struct file_operations debugfs_noop_file_operations;
32extern const struct file_operations debugfs_open_proxy_file_operations;
33extern const struct file_operations debugfs_full_proxy_file_operations;
34extern const struct file_operations debugfs_full_short_proxy_file_operations;
35
36struct debugfs_fsdata {
37	const struct file_operations *real_fops;
38	const struct debugfs_short_fops *short_fops;
39	struct {
40		refcount_t active_users;
41		struct completion active_users_drained;
42
43		/* protect cancellations */
44		struct mutex cancellations_mtx;
45		struct list_head cancellations;
46		unsigned int methods;
47	};
48};
49
50enum {
51	HAS_READ = 1,
52	HAS_WRITE = 2,
53	HAS_LSEEK = 4,
54	HAS_POLL = 8,
55	HAS_IOCTL = 16
56};
57
58#endif /* _DEBUGFS_INTERNAL_H_ */