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 super_block *sb, struct dentry *parent,
  22                                   const char *name);
  23
  24 extern struct dentry *hypfs_create_u64(struct super_block *sb,
  25                                        struct dentry *dir, const char *name,
  26                                        __u64 value);
  27
  28 extern struct dentry *hypfs_create_str(struct super_block *sb,
  29                                        struct dentry *dir, const char *name,
  30                                        char *string);
  31
  32 /* LPAR Hypervisor */
  33 extern int hypfs_diag_init(void);
  34 extern void hypfs_diag_exit(void);
  35 extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
  36
  37 /* VM Hypervisor */
  38 extern int hypfs_vm_init(void);
  39 extern void hypfs_vm_exit(void);
  40 extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
  41
  42 /* debugfs interface */
  43 struct hypfs_dbfs_file;
  44
  45 struct hypfs_dbfs_data {
  46         void                    *buf;
  47         void                    *buf_free_ptr;
  48         size_t                  size;
  49         struct hypfs_dbfs_file  *dbfs_file;
  50         struct kref             kref;
  51 };
  52
  53 struct hypfs_dbfs_file {
  54         const char      *name;
  55         int             (*data_create)(void **data, void **data_free_ptr,
  56                                        size_t *size);
  57         void            (*data_free)(const void *buf_free_ptr);
  58
  59         /* Private data for hypfs_dbfs.c */
  60         struct hypfs_dbfs_data  *data;
  61         struct delayed_work     data_free_work;
  62         struct mutex            lock;
  63         struct dentry           *dentry;
  64 };
  65
  66 extern int hypfs_dbfs_init(void);
  67 extern void hypfs_dbfs_exit(void);
  68 extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
  69 extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
  70
  71 #endif /* _HYPFS_H_ */