xref: /openbmc/linux/arch/s390/hypfs/hypfs.h (revision 3325b4d8)
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 
hypfs_fs_init(void)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