hypfs.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 *    Hypervisor filesystem for Linux on s390.
 4 *
 5 *    Copyright IBM Corp. 2006
 6 *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
 7 */
 8
 9#ifndef _HYPFS_H_
10#define _HYPFS_H_
11
12#include <linux/fs.h>
13#include <linux/types.h>
14#include <linux/debugfs.h>
15#include <linux/workqueue.h>
16#include <linux/kref.h>
17#include <asm/hypfs.h>
18
19#define REG_FILE_MODE    0440
20#define UPDATE_FILE_MODE 0220
21#define DIR_MODE         0550
22
23extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name);
24
25extern int hypfs_create_u64(struct dentry *dir, const char *name, __u64 value);
26
27extern int hypfs_create_str(struct dentry *dir, const char *name, char *string);
28
29/* LPAR Hypervisor */
30extern int hypfs_diag_init(void);
31extern void hypfs_diag_exit(void);
32extern int hypfs_diag_create_files(struct dentry *root);
33
34/* VM Hypervisor */
35extern int hypfs_vm_init(void);
36extern void hypfs_vm_exit(void);
37extern int hypfs_vm_create_files(struct dentry *root);
38
39/* VM diagnose 0c */
40int hypfs_diag0c_init(void);
41void hypfs_diag0c_exit(void);
42
43/* Set Partition-Resource Parameter */
44void hypfs_sprp_init(void);
45void hypfs_sprp_exit(void);
46
47int __hypfs_fs_init(void);
48
49static __always_inline int hypfs_fs_init(void)
50{
51	if (IS_ENABLED(CONFIG_S390_HYPFS_FS))
52		return __hypfs_fs_init();
53	return 0;
54}
55
56/* debugfs interface */
57struct hypfs_dbfs_file;
58
59struct hypfs_dbfs_data {
60	void			*buf;
61	void			*buf_free_ptr;
62	size_t			size;
63	struct hypfs_dbfs_file	*dbfs_file;
64};
65
66struct hypfs_dbfs_file {
67	const char	*name;
68	int		(*data_create)(void **data, void **data_free_ptr,
69				       size_t *size);
70	void		(*data_free)(const void *buf_free_ptr);
71	long		(*unlocked_ioctl) (struct file *, unsigned int,
72					   unsigned long);
73
74	/* Private data for hypfs_dbfs.c */
75	struct mutex		lock;
76	struct dentry		*dentry;
77};
78
79extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
80extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
81
82#endif /* _HYPFS_H_ */