hypfs.h

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/*
 *    Hypervisor filesystem for Linux on s390.
 *
 *    Copyright IBM Corp. 2006
 *    Author(s): Michael Holzheu <[email protected]>
 */

#ifndef _HYPFS_H_
#define _HYPFS_H_

#include <linux/fs.h>
#include <linux/types.h>
#include <linux/debugfs.h>
#include <linux/workqueue.h>
#include <linux/kref.h>

#define REG_FILE_MODE    0440
#define UPDATE_FILE_MODE 0220
#define DIR_MODE         0550

extern struct dentry *hypfs_mkdir(struct super_block *sb, struct dentry *parent,
                  const char *name);

extern struct dentry *hypfs_create_u64(struct super_block *sb,
                       struct dentry *dir, const char *name,
                       __u64 value);

extern struct dentry *hypfs_create_str(struct super_block *sb,
                       struct dentry *dir, const char *name,
                       char *string);

/* LPAR Hypervisor */
extern int hypfs_diag_init(void);
extern void hypfs_diag_exit(void);
extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);

/* VM Hypervisor */
extern int hypfs_vm_init(void);
extern void hypfs_vm_exit(void);
extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);

/* debugfs interface */
struct hypfs_dbfs_file;

struct hypfs_dbfs_data {
    void            *buf;
    void            *buf_free_ptr;
    size_t          size;
    struct hypfs_dbfs_file  *dbfs_file;
    struct kref     kref;
};

struct hypfs_dbfs_file {
    const char  *name;
    int     (*data_create)(void **data, void **data_free_ptr,
                       size_t *size);
    void        (*data_free)(const void *buf_free_ptr);

    /* Private data for hypfs_dbfs.c */
    struct hypfs_dbfs_data  *data;
    struct delayed_work data_free_work;
    struct mutex        lock;
    struct dentry       *dentry;
};

extern int hypfs_dbfs_init(void);
extern void hypfs_dbfs_exit(void);
extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);

#endif /* _HYPFS_H_ */