arch/s390/hypfs/hypfs.h

   1 /*
   2  *    Hypervisor filesystem for Linux on s390.
   3  *
   4  *    Copyright IBM Corp. 2006
   5  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
   6  */
   7
   8 #ifndef _HYPFS_H_
   9 #define _HYPFS_H_
  10
  11 #include <linux/fs.h>
  12 #include <linux/types.h>
  13 #include <linux/debugfs.h>
  14 #include <linux/workqueue.h>
  15 #include <linux/kref.h>
  16
  17 #define REG_FILE_MODE    0440
  18 #define UPDATE_FILE_MODE 0220
  19 #define DIR_MODE         0550
  20
  21 extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name);
  22
  23 extern struct dentry *hypfs_create_u64(struct dentry *dir, const char *name,
  24                                        __u64 value);
  25
  26 extern struct dentry *hypfs_create_str(struct dentry *dir, const char *name,
  27                                        char *string);
  28
  29 /* LPAR Hypervisor */
  30 extern int hypfs_diag_init(void);
  31 extern void hypfs_diag_exit(void);
  32 extern int hypfs_diag_create_files(struct dentry *root);
  33
  34 /* VM Hypervisor */
  35 extern int hypfs_vm_init(void);
  36 extern void hypfs_vm_exit(void);
  37 extern int hypfs_vm_create_files(struct dentry *root);
  38
  39 /* debugfs interface */
  40 struct hypfs_dbfs_file;
  41
  42 struct hypfs_dbfs_data {
  43         void                    *buf;
  44         void                    *buf_free_ptr;
  45         size_t                  size;
  46         struct hypfs_dbfs_file  *dbfs_file;
  47         struct kref             kref;
  48 };
  49
  50 struct hypfs_dbfs_file {
  51         const char      *name;
  52         int             (*data_create)(void **data, void **data_free_ptr,
  53                                        size_t *size);
  54         void            (*data_free)(const void *buf_free_ptr);
  55
  56         /* Private data for hypfs_dbfs.c */
  57         struct hypfs_dbfs_data  *data;
  58         struct delayed_work     data_free_work;
  59         struct mutex            lock;
  60         struct dentry           *dentry;
  61 };
  62
  63 extern int hypfs_dbfs_init(void);
  64 extern void hypfs_dbfs_exit(void);
  65 extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
  66 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
  67
  68 #endif /* _HYPFS_H_ */