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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 
 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 

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