arch/s390/hypfs/hypfs.h

   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_ */