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/** @file
* Module to dynamically load libfuse/libosxfuse and load all symbols which are needed by
* vboximg-mount.
*/
/*
* Copyright (C) 2019-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
* --------------------------------------------------------------------
*
* This code is based on and contains parts of:
*
* libfuse
*
* FUSE: Filesystem in Userspace
* Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
*
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB.
*/
#ifndef VBOX_INCLUDED_SRC_vboximg_mount_fuse_h
#define VBOX_INCLUDED_SRC_vboximg_mount_fuse_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/types.h>
#include <iprt/stdarg.h>
RT_C_DECLS_BEGIN
/* Forward declaration of stat buffer. */
struct stat;
/**
* Fuse option structure.
*/
typedef struct fuse_opt
{
/** Argument template with optional parameter formatting. */
const char *pszTempl;
/** Offset where the parameter is stored inside the data struct passed to fuse_opt_parse(). */
unsigned long uOffset;
/** The value to set the variable to if the template has no argument format. */
int uVal;
} fuse_opt;
#define FUSE_OPT_KEY(templ, key) { templ, -1U, key }
#define FUSE_OPT_END { NULL, 0, 0 }
#define FUSE_OPT_KEY_NONOPT -2
/**
* Fuse argument vector.
*/
typedef struct fuse_args
{
int argc;
char **argv;
int allocated;
} fuse_args;
#define FUSE_ARGS_INIT(argc, argv) { argc, argv, 0 }
/**
* Fuse file info structure - for us only the fh member is of interest for now.
*/
typedef struct fuse_file_info
{
int flags;
unsigned long fh_old;
int writepage;
unsigned int oth_flags;
uint64_t fh;
uint64_t lock_owner;
} fuse_file_info;
/** Option processing function. */
typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key, struct fuse_args *outargs);
/** Directory entry filler function. */
typedef int (*fuse_fill_dir_t) (void *buf, const char *name, const struct stat *stbuf, off_t off);
/**
* Fuse FS callback table implementing the filesystem functionality.
*
* Only required methods are filled out, others are stubbed (change as required).
*/
typedef struct fuse_operations
{
int (*getattr) (const char *pszPath, struct stat *pStatBuf);
int (*readlink) (const char *pszPath, char *pbBuf, size_t cbBuf);
PFNRT getdir;
PFNRT mknod;
PFNRT mkdir;
PFNRT unlink;
PFNRT rmdir;
PFNRT symlink;
PFNRT rename;
PFNRT link;
PFNRT chmod;
PFNRT chown;
PFNRT truncate;
PFNRT utime;
int (*open) (const char *pszPath, struct fuse_file_info *pInfo);
int (*read) (const char *pszPath, char *pbBuf, size_t cbBuf, off_t off, struct fuse_file_info *pInfo);
int (*write) (const char *pszPath, const char *pbBuf, size_t cbBuf, off_t off, struct fuse_file_info *pInfo);
PFNRT statfs;
PFNRT flush;
int (*release) (const char *pszPath, struct fuse_file_info *pInfo);
PFNRT fsync;
PFNRT setxattr; /* OSXFuse has a different parameter layout. */
PFNRT getxattr; /* OSXFuse has a different parameter layout. */
PFNRT listxattr;
PFNRT removexattr;
int (*opendir) (const char *pszPath, struct fuse_file_info *pInfo);
int (*readdir) (const char *pszPath, void *pvBuf, fuse_fill_dir_t pfnFiller, off_t offset, struct fuse_file_info *pInfo);
PFNRT releasedir;
PFNRT fsyncdir;
PFNRT init;
PFNRT destroy;
PFNRT access;
PFNRT create;
PFNRT ftruncate;
PFNRT fgettatr;
PFNRT lock;
PFNRT utimens;
PFNRT bmap;
unsigned int flag_null_path_ok: 1;
unsigned int flag_nopath: 1;
unsigned int flag_utime_omit_ok: 1;
unsigned int flag_reserved: 20;
PFNRT ioctl;
PFNRT poll;
PFNRT write_buf;
PFNRT read_buf;
PFNRT flock;
PFNRT fallocate;
#ifdef RT_OS_DARWIN
PFNRT rsvd00;
PFNRT rsvd01;
PFNRT rsvd02;
PFNRT statfs_x;
PFNRT setvolname;
PFNRT exchange;
PFNRT getxtimes;
PFNRT setbkuptime;
PFNRT setchgtime;
PFNRT setcrtime;
PFNRT chflags;
PFNRT setattr_x;
PFNRT fsetattr_x;
#endif
} fuse_operations;
/* Declarations of the functions that we need from libfuse */
#define VBOX_FUSE_GENERATE_HEADER
#include "fuse-calls.h"
#undef VBOX_FUSE_GENERATE_HEADER
RT_C_DECLS_END
#endif /* !VBOX_INCLUDED_SRC_vboximg_mount_fuse_h */
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