vfsmod.h revision e64031e20c39650a7bc902a3e1aba613b9415dee
/** @file
*
* vboxvfs -- VirtualBox Guest Additions for Linux
*/
/*
* Copyright (C) 2006-2007 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef VFSMOD_H
#define VFSMOD_H
#include "the-linux-kernel.h"
#include "version-generated.h"
#include "product-generated.h"
#if LINUX_VERSION_CODE >= KERNEL_VERSION (2, 6, 0)
# include <linux/backing-dev.h>
#endif
#include "VBoxCalls.h"
#include "vbsfmount.h"
/* per-shared folder information */
struct sf_glob_info {
VBSFMAP map;
struct nls_table *nls;
int ttl;
int uid;
int gid;
int dmode;
int fmode;
int dmask;
int fmask;
#if LINUX_VERSION_CODE >= KERNEL_VERSION (2, 6, 0)
struct backing_dev_info bdi;
#endif
};
/* per-inode information */
struct sf_inode_info {
/* which file */
SHFLSTRING *path;
/* some information was changed, update data on next revalidate */
int force_restat;
/* file structure, only valid between open() and release() */
struct file *file;
/* handle valid if a file was created with sf_create_aux until it will
* be opened with sf_reg_open() */
SHFLHANDLE handle;
};
struct sf_dir_info {
struct list_head info_list;
};
struct sf_dir_buf {
size_t nb_entries;
size_t free_bytes;
size_t used_bytes;
void *buf;
struct list_head head;
};
struct sf_reg_info {
SHFLHANDLE handle;
};
/* globals */
extern VBSFCLIENT client_handle;
/* forward declarations */
extern struct inode_operations sf_dir_iops;
extern struct inode_operations sf_reg_iops;
extern struct file_operations sf_dir_fops;
extern struct file_operations sf_reg_fops;
extern struct dentry_operations sf_dentry_ops;
extern struct address_space_operations sf_reg_aops;
extern void
sf_init_inode (struct sf_glob_info *sf_g, struct inode *inode,
RTFSOBJINFO *info);
extern int
sf_stat (const char *caller, struct sf_glob_info *sf_g,
SHFLSTRING *path, RTFSOBJINFO *result, int ok_to_fail);
extern int
sf_inode_revalidate (struct dentry *dentry);
#if LINUX_VERSION_CODE >= KERNEL_VERSION (2, 6, 0)
extern int
sf_getattr (struct vfsmount *mnt, struct dentry *dentry, struct kstat *kstat);
extern int
sf_setattr (struct dentry *dentry, struct iattr *iattr);
#endif
extern int
sf_path_from_dentry (const char *caller, struct sf_glob_info *sf_g,
struct sf_inode_info *sf_i, struct dentry *dentry,
SHFLSTRING **result);
extern int
sf_nlscpy (struct sf_glob_info *sf_g,
char *name, size_t name_bound_len,
const unsigned char *utf8_name, size_t utf8_len);
extern void
sf_dir_info_free (struct sf_dir_info *p);
extern struct sf_dir_info *
sf_dir_info_alloc (void);
extern int
sf_dir_read_all (struct sf_glob_info *sf_g, struct sf_inode_info *sf_i,
struct sf_dir_info *sf_d, SHFLHANDLE handle);
extern int
sf_init_backing_dev (struct sf_glob_info *sf_g, const char *name);
extern void
sf_done_backing_dev (struct sf_glob_info *sf_g);
#if LINUX_VERSION_CODE < KERNEL_VERSION (2, 6, 0)
#define STRUCT_STATFS struct statfs
#else
#define STRUCT_STATFS struct kstatfs
#endif
int sf_get_volume_info(struct super_block *sb,STRUCT_STATFS *stat);
#ifdef __cplusplus
# define CMC_API __attribute__ ((cdecl, regparm (0)))
#else
# define CMC_API __attribute__ ((regparm (0)))
#endif
#define TRACE() LogFunc (("tracepoint\n"))
/* Following casts are here to prevent assignment of void * to
pointers of arbitrary type */
#if LINUX_VERSION_CODE < KERNEL_VERSION (2, 6, 0)
#define GET_GLOB_INFO(sb) ((struct sf_glob_info *) (sb)->u.generic_sbp)
#define SET_GLOB_INFO(sb, sf_g) (sb)->u.generic_sbp = sf_g
#else
#define GET_GLOB_INFO(sb) ((struct sf_glob_info *) (sb)->s_fs_info)
#define SET_GLOB_INFO(sb, sf_g) (sb)->s_fs_info = sf_g
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION (2, 6, 19) || defined(KERNEL_FC6)
/* FC6 kernel 2.6.18, vanilla kernel 2.6.19+ */
#define GET_INODE_INFO(i) ((struct sf_inode_info *) (i)->i_private)
#define SET_INODE_INFO(i, sf_i) (i)->i_private = sf_i
#else
/* vanilla kernel up to 2.6.18 */
#define GET_INODE_INFO(i) ((struct sf_inode_info *) (i)->u.generic_ip)
#define SET_INODE_INFO(i, sf_i) (i)->u.generic_ip = sf_i
#endif
#endif /* vfsmod.h */