linux/arch/s390/hypfs/hypfs.h
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   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
  22extern struct dentry *hypfs_mkdir(struct super_block *sb, struct dentry *parent,
  23                                  const char *name);
  24
  25extern struct dentry *hypfs_create_u64(struct super_block *sb,
  26                                       struct dentry *dir, const char *name,
  27                                       __u64 value);
  28
  29extern struct dentry *hypfs_create_str(struct super_block *sb,
  30                                       struct dentry *dir, const char *name,
  31                                       char *string);
  32
  33/* LPAR Hypervisor */
  34extern int hypfs_diag_init(void);
  35extern void hypfs_diag_exit(void);
  36extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
  37
  38/* VM Hypervisor */
  39extern int hypfs_vm_init(void);
  40extern void hypfs_vm_exit(void);
  41extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
  42
  43/* debugfs interface */
  44struct hypfs_dbfs_file;
  45
  46struct 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
  54struct 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
  67extern int hypfs_dbfs_init(void);
  68extern void hypfs_dbfs_exit(void);
  69extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
  70extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
  71
  72#endif /* _HYPFS_H_ */
  73