/**
 * @file dll/fuse/library.h
 *
 * @copyright 2015-2018 Bill Zissimopoulos
 */
/*
 * This file is part of WinFsp.
 *
 * You can redistribute it and/or modify it under the terms of the GNU
 * General Public License version 3 as published by the Free Software
 * Foundation.
 *
 * Licensees holding a valid commercial license may use this file in
 * accordance with the commercial license agreement provided with the
 * software.
 */

#ifndef WINFSP_DLL_FUSE_LIBRARY_H_INCLUDED
#define WINFSP_DLL_FUSE_LIBRARY_H_INCLUDED

#include <dll/library.h>
#include <fuse/fuse.h>
#include <fuse/fuse_opt.h>

#define FSP_FUSE_LIBRARY_NAME           LIBRARY_NAME "-FUSE"

#define FSP_FUSE_HDR_FROM_CONTEXT(c)    \
    (struct fsp_fuse_context_header *)((PUINT8)(c) - sizeof(struct fsp_fuse_context_header))
#define FSP_FUSE_CONTEXT_FROM_HDR(h)    \
    (struct fuse_context *)((PUINT8)(h) + sizeof(struct fsp_fuse_context_header))

#define FSP_FUSE_HAS_SYMLINKS(f)        ((f)->has_symlinks)

struct fuse
{
    struct fsp_fuse_env *env;
    int set_umask, umask;
    int set_create_umask, create_umask;
    int set_uid, uid;
    int set_gid, gid;
    int rellinks;
    unsigned ThreadCount;
    struct fuse_operations ops;
    void *data;
    unsigned conn_want;
    BOOLEAN fsinit;
    BOOLEAN has_symlinks;
    UINT32 DebugLog;
    FSP_FILE_SYSTEM_OPERATION_GUARD_STRATEGY OpGuardStrategy;
    FSP_FSCTL_VOLUME_PARAMS VolumeParams;
    UINT16 VolumeLabelLength;
    WCHAR VolumeLabel[sizeof ((FSP_FSCTL_VOLUME_INFO *)0)->VolumeLabel / sizeof(WCHAR)];
    PWSTR MountPoint;
    FSP_FILE_SYSTEM *FileSystem;
    FSP_SERVICE *Service; /* weak */
    volatile int exited;
};

struct fsp_fuse_context_header
{
    char *PosixPath;
    __declspec(align(MEMORY_ALLOCATION_ALIGNMENT)) UINT8 ContextBuf[];
};

struct fsp_fuse_file_desc
{
    char *PosixPath;
    BOOLEAN IsDirectory, IsReparsePoint;
    int OpenFlags;
    UINT64 FileHandle;
    PVOID DirBuffer;
};

struct fuse_dirhandle
{
    /* ReadDirectory */
    struct fsp_fuse_file_desc *filedesc;
    FSP_FILE_SYSTEM *FileSystem;
    BOOLEAN ReaddirPlus;
    NTSTATUS Result;
    /* CanDelete */
    BOOLEAN DotFiles, HasChild;
};

NTSTATUS fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
    FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
NTSTATUS fsp_fuse_op_leave(FSP_FILE_SYSTEM *FileSystem,
    FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);

extern FSP_FILE_SYSTEM_INTERFACE fsp_fuse_intf;

NTSTATUS fsp_fuse_get_token_uidgid(
    HANDLE Token,
    TOKEN_INFORMATION_CLASS UserOrOwnerClass, /* TokenUser|TokenOwner */
    PUINT32 PUid, PUINT32 PGid);

/* NFS reparse points */

#define NFS_SPECFILE_FIFO               0x000000004F464946
#define NFS_SPECFILE_CHR                0x0000000000524843
#define NFS_SPECFILE_BLK                0x00000000004b4c42
#define NFS_SPECFILE_LNK                0x00000000014b4e4c
#define NFS_SPECFILE_SOCK               0x000000004B434F53

#endif