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
23 extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name);
24
25 extern struct dentry *hypfs_create_u64(struct dentry *dir, const char *name,
26 __u64 value);
27
28 extern struct dentry *hypfs_create_str(struct dentry *dir, const char *name,
29 char *string);
30
31 /* LPAR Hypervisor */
32 extern int hypfs_diag_init(void);
33 extern void hypfs_diag_exit(void);
34 extern int hypfs_diag_create_files(struct dentry *root);
35
36 /* VM Hypervisor */
37 extern int hypfs_vm_init(void);
38 extern void hypfs_vm_exit(void);
39 extern int hypfs_vm_create_files(struct dentry *root);
40
41 /* VM diagnose 0c */
42 int hypfs_diag0c_init(void);
43 void hypfs_diag0c_exit(void);
44
45 /* Set Partition-Resource Parameter */
46 void hypfs_sprp_init(void);
47 void hypfs_sprp_exit(void);
48
49 int __hypfs_fs_init(void);
50
51 static inline int hypfs_fs_init(void)
52 {
53 if (IS_ENABLED(CONFIG_S390_HYPFS_FS))
54 return __hypfs_fs_init();
55 return 0;
56 }
57
58 /* debugfs interface */
59 struct hypfs_dbfs_file;
60
61 struct hypfs_dbfs_data {
62 void *buf;
63 void *buf_free_ptr;
64 size_t size;
65 struct hypfs_dbfs_file *dbfs_file;
66 };
67
68 struct hypfs_dbfs_file {
69 const char *name;
70 int (*data_create)(void **data, void **data_free_ptr,
71 size_t *size);
72 void (*data_free)(const void *buf_free_ptr);
73 long (*unlocked_ioctl) (struct file *, unsigned int,
74 unsigned long);
75
76 /* Private data for hypfs_dbfs.c */
77 struct mutex lock;
78 struct dentry *dentry;
79 };
80
81 extern void hypfs_dbfs_exit(void);
82 extern void hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
83 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
84
85 #endif /* _HYPFS_H_ */
86
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