xref: /openbmc/linux/arch/s390/hypfs/hypfs.h (revision 4800cd83)
1 /*
2  *  arch/s390/hypfs/hypfs.h
3  *    Hypervisor filesystem for Linux on s390.
4  *
5  *    Copyright (C) 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 
18 #define REG_FILE_MODE    0440
19 #define UPDATE_FILE_MODE 0220
20 #define DIR_MODE         0550
21 
22 extern struct dentry *hypfs_mkdir(struct super_block *sb, struct dentry *parent,
23 				  const char *name);
24 
25 extern struct dentry *hypfs_create_u64(struct super_block *sb,
26 				       struct dentry *dir, const char *name,
27 				       __u64 value);
28 
29 extern struct dentry *hypfs_create_str(struct super_block *sb,
30 				       struct dentry *dir, const char *name,
31 				       char *string);
32 
33 /* LPAR Hypervisor */
34 extern int hypfs_diag_init(void);
35 extern void hypfs_diag_exit(void);
36 extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
37 
38 /* VM Hypervisor */
39 extern int hypfs_vm_init(void);
40 extern void hypfs_vm_exit(void);
41 extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
42 
43 /* debugfs interface */
44 struct hypfs_dbfs_file;
45 
46 struct hypfs_dbfs_data {
47 	void			*buf;
48 	void			*buf_free_ptr;
49 	size_t			size;
50 	struct hypfs_dbfs_file	*dbfs_file;;
51 	struct kref		kref;
52 };
53 
54 struct hypfs_dbfs_file {
55 	const char	*name;
56 	int		(*data_create)(void **data, void **data_free_ptr,
57 				       size_t *size);
58 	void		(*data_free)(const void *buf_free_ptr);
59 
60 	/* Private data for hypfs_dbfs.c */
61 	struct hypfs_dbfs_data	*data;
62 	struct delayed_work	data_free_work;
63 	struct mutex		lock;
64 	struct dentry		*dentry;
65 };
66 
67 extern int hypfs_dbfs_init(void);
68 extern void hypfs_dbfs_exit(void);
69 extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
70 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
71 
72 #endif /* _HYPFS_H_ */
73